* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS Variables matching studything */
:root {
    --bg-primary: #FAF7F2;
    --bg-secondary: #FAF7F2;
    --bg-tertiary: #FAF7F2;
    --bg-card: white;
    --text-primary: #2F2F2F;
    --text-secondary: #6B6B6B;
    --text-tertiary: #6B6B6B;
    --text-muted: #6B6B6B;
    --border-color: #E6E2DA;
    --shadow: rgba(47, 47, 47, 0.08);
    --shadow-soft: rgba(47, 47, 47, 0.04);
    --accent-primary: #7FA89A;
    --accent-secondary: #5E8578;
    --accent-gradient: linear-gradient(135deg, #7FA89A 0%, #5E8578 100%);
    --success-color: #8FBFB0;
    --error-color: #D89A9A;
    --warning-color: #E6C79C;
    /* Design system: spacing (8px base) */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    /* Typography */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

[data-theme="dark"] {
    --bg-primary: #2F2F2F;
    --bg-secondary: #2F2F2F;
    --bg-tertiary: #3A3A3A;
    --bg-card: #3A3A3A;
    --text-primary: #FAF7F2;
    --text-secondary: #B8B8B8;
    --text-tertiary: #8F8F8F;
    --text-muted: #6B6B6B;
    --border-color: #4A4A4A;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-soft: rgba(0, 0, 0, 0.15);
    --accent-primary: #8FBFB0;
    --accent-secondary: #7FA89A;
    --accent-gradient: linear-gradient(135deg, #8FBFB0 0%, #7FA89A 100%);
    --success-color: #8FBFB0;
    --error-color: #D89A9A;
    --warning-color: #E6C79C;
}

html, body {
    height: 100%;
    margin: 0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    min-height: 100vh;
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-height: 100dvh;
    height: 100vh;
    height: 100dvh;
    width: 100%;
    overflow: hidden;
}

/* Smooth transitions for all theme-dependent elements */
* {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* Exclude elements that shouldn't transition */
input, textarea, button, a, img, svg {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

header {
    flex-shrink: 0;
    background: var(--bg-card);
    padding: var(--space-lg) var(--space-xl);
    box-shadow: 0 1px 0 var(--border-color);
    margin-bottom: 0;
    border-bottom: 1px solid var(--border-color);
    width: 100%;
}

.header-content {
    max-width: 100%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-lg);
}

.header-title-section {
    flex: 1;
    min-width: 0;
}

.back-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    margin-bottom: 1rem;
    color: var(--accent-primary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 12px;
    transition: all 0.2s;
    border: 2px solid transparent;
}

.back-button:hover {
    background: rgba(127, 168, 154, 0.1);
    border-color: var(--accent-primary);
    transform: translateX(-2px);
}

.back-icon {
    font-size: 1.2rem;
    font-weight: 600;
}

.back-text {
    font-weight: 500;
}

.page-title {
    color: var(--text-primary);
    font-size: var(--text-2xl);
    margin: 0;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.beta-label {
    display: inline-block;
    font-size: 0.5em;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary, #6b7280);
    background: var(--bg-tertiary, rgba(0, 0, 0, 0.08));
    padding: 0.15em 0.5em;
    border-radius: 4px;
    vertical-align: middle;
    margin-left: 0.25em;
}

.header-subtitle {
    display: none;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.lockin-header-avatar {
    flex-shrink: 0;
}

.lockin-header-avatar-link {
    display: block;
    line-height: 0;
}

.lockin-header-avatar-img {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: contain;
    border: 2px solid var(--border-color);
}

.lockin-header-avatar-link:hover .lockin-header-avatar-img {
    border-color: var(--accent-primary);
}

/* Same XP block as main app (points-display, xp-container, etc.) */
.lockin-xp-display {
    flex: 0 1 auto;
    max-width: 420px;
}

.lockin-xp-display .xp-container {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.lockin-xp-display .xp-info {
    display: flex;
    align-items: baseline;
    gap: 6px;
}

.lockin-xp-display .xp-label {
    font-size: 0.75em;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.lockin-xp-display .xp-value {
    font-size: 1.25em;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.3px;
}

.lockin-xp-display .level-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    background: var(--accent-gradient);
    color: white;
    border-radius: 12px;
    font-size: 0.75em;
    font-weight: 700;
    box-shadow: 0 2px 6px var(--shadow-soft, rgba(0,0,0,0.08));
}

.lockin-xp-display .xp-progress-bar {
    flex: 1;
    min-width: 100px;
    max-width: 180px;
    height: 6px;
    background: rgba(224, 224, 224, 0.4);
    border-radius: 10px;
    overflow: hidden;
}

.lockin-xp-display .xp-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #7FA89A 0%, #5E8578 100%);
    border-radius: 10px;
    transition: width 0.5s ease;
    width: 0%;
}

.lockin-xp-display .xp-to-next {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    white-space: nowrap;
}

.dark-mode-toggle {
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    font-size: 1.5em;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 48px;
    height: 48px;
    box-shadow: 0 2px 8px var(--shadow);
}

.dark-mode-toggle:hover {
    background: var(--bg-card);
    border-color: var(--accent-primary);
    transform: scale(1.05);
    box-shadow: 0 4px 12px var(--shadow);
}

.dark-mode-icon {
    transition: transform 0.3s ease;
    font-size: 1.3em;
}

[data-theme="dark"] .dark-mode-icon {
    transform: rotate(180deg);
}

.create-dropdown-wrapper {
    position: relative;
}

.btn-create-primary {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.2s;
    white-space: nowrap;
    box-shadow: 0 2px 8px var(--shadow);
}

.btn-create-primary:hover {
    background: var(--accent-secondary);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow);
}

.btn-create-primary .btn-icon {
    font-size: 1.2rem;
    font-weight: 300;
    line-height: 1;
}

.btn-home {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--bg-card);
    color: var(--text-primary);
    border: 2px solid var(--accent-primary);
    border-radius: 12px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.2s;
    white-space: nowrap;
    text-decoration: none;
    box-shadow: 0 2px 8px var(--shadow);
}

.btn-home:hover {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow);
}

.btn-home .btn-icon {
    font-size: 1.2rem;
    font-weight: 300;
    line-height: 1;
}

.create-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--bg-card);
    border-radius: 12px;
    box-shadow: 0 4px 16px var(--shadow);
    border: 1px solid var(--border-color);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s ease;
    z-index: 1000;
    overflow: hidden;
}

.create-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.75rem 1rem;
    background: transparent;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--text-primary);
    transition: background 0.15s;
}

.dropdown-item:hover {
    background: var(--bg-secondary);
}

.dropdown-item:first-child {
    border-top-left-radius: 12px;
    border-top-right-radius: 12px;
}

.dropdown-item:last-child {
    border-bottom-left-radius: 12px;
    border-bottom-right-radius: 12px;
}

.dropdown-icon {
    font-size: 1.1rem;
    width: 1.5rem;
    text-align: center;
}

#app-main {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    width: 100%;
    overflow: auto;
}

#app-main.hidden {
    display: none !important;
}

#main-content {
    flex: 1;
    padding: var(--space-2xl) var(--space-xl) var(--space-3xl);
    max-width: 720px;
    margin: 0 auto;
    width: 100%;
}

/* Hub Editor specific main content padding */
.hub-editor-container {
    padding: 1rem 0;
}

.page-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-3xl);
    padding-top: var(--space-lg);
}

.homepage-you {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 0;
}

.homepage-you-avatar {
    flex-shrink: 0;
}

.homepage-avatar-img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: contain;
    border: 2px solid var(--border-color);
}

.homepage-you-text {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Study Sections */
.study-section {
    width: 100%;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 1.5rem 0;
    letter-spacing: -0.01em;
}

/* Discover / Recent: collapsible */
.discover-details,
.recent-details {
    border: 1px solid var(--border-color, rgba(0,0,0,0.1));
    border-radius: 8px;
    margin-bottom: var(--space-xl);
    background: var(--bg-secondary, rgba(0,0,0,0.02));
}

.discover-summary,
.recent-summary {
    cursor: pointer;
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--text-primary);
    list-style: none;
    padding: var(--space-md) var(--space-lg);
    padding-right: 2.5rem;
    position: relative;
    display: block;
}

.discover-summary::-webkit-details-marker,
.recent-summary::-webkit-details-marker { display: none; }

.discover-summary::after,
.recent-summary::after {
    content: '\25BC';
    position: absolute;
    right: var(--space-md);
    top: 50%;
    transform: translateY(-50%) rotate(-90deg);
    font-size: 1rem;
    color: var(--accent-primary);
    transition: transform 0.2s ease;
}

.discover-details[open] .discover-summary::after,
.recent-details[open] .recent-summary::after {
    transform: translateY(-50%) rotate(0deg);
}

.discover-summary:hover,
.recent-summary:hover {
    color: var(--accent-primary);
    background: var(--bg-tertiary, rgba(0,0,0,0.04));
}

.discover-summary:hover::after,
.recent-summary:hover::after {
    color: var(--accent-primary);
}

.discover-content-inner { padding-top: var(--space-lg); }

.empty-continue-state {
    padding: var(--space-xl) 0;
    text-align: center;
}

.empty-continue-text {
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--text-primary);
    margin: 0 0 var(--space-xs) 0;
}

.empty-continue-hint {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin: 0;
}

/* Continue Studying Section - Most Prominent */
.continue-studying-section {
    margin-bottom: var(--space-2xl);
}

.continue-studying-content {
    width: 100%;
}

.continue-studying-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 4px 16px var(--shadow);
    border: 2px solid var(--accent-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    transition: all 0.2s;
}

.continue-studying-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow);
}

.continue-card-content {
    flex: 1;
}

.continue-card-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
}

.continue-card-status {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 0;
}

.btn-resume {
    padding: 0.875rem 2rem;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    box-shadow: 0 2px 8px var(--shadow);
}

.btn-resume:hover {
    background: var(--accent-secondary);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow);
}

/* My Hubs Section */
.my-hubs-section {
    margin-bottom: 2rem;
}

.hubs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.hub-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px var(--shadow-soft);
    border: 1px solid var(--border-color);
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.hub-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
    border-color: var(--accent-primary);
}

.hub-card.empty {
    opacity: 0.7;
    border-style: dashed;
}

.hub-card-header {
    flex: 1;
}

.hub-card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.hub-card-resources {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
}

.resource-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.75rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.resource-badge.empty {
    color: var(--text-tertiary);
    font-style: italic;
}

.resource-icon {
    font-size: 0.9rem;
}

.hub-card-actions {
    margin-top: auto;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.btn-open-hub {
    flex: 1;
    min-width: 0;
    padding: 0.75rem 1rem;
    background: transparent;
    color: var(--accent-primary);
    border: 2px solid var(--accent-primary);
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-open-hub:hover {
    background: var(--accent-primary);
    color: white;
}

.btn-share-hub,
.lockin-share-btn {
    padding: 0.75rem 0.75rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-share-hub:hover,
.lockin-share-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.shared-link-banner {
    background: var(--accent-primary);
    color: white;
    padding: 0.75rem 1.25rem;
    border-radius: 10px;
    margin-bottom: 1rem;
    box-shadow: 0 2px 8px var(--shadow);
}

.shared-link-banner-inner {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.shared-link-title {
    flex: 1;
    min-width: 0;
    font-weight: 500;
}

.shared-link-banner .btn-copy-shared {
    padding: 0.5rem 1rem;
    background: white;
    color: var(--accent-secondary);
    border: none;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
}

.shared-link-banner .shared-link-dismiss {
    background: transparent;
    border: none;
    color: white;
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0 0.25rem;
    line-height: 1;
}

.lockin-toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.75rem 1.5rem;
    background: var(--text-primary);
    color: var(--bg-primary);
    border-radius: 10px;
    font-size: 0.9rem;
    z-index: 9999;
    box-shadow: 0 4px 12px var(--shadow);
}

/* Empty Hubs State */
.empty-hubs-state {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 4rem 2rem;
    text-align: center;
    border: 2px dashed var(--border-color);
}

.empty-hubs-state .empty-state-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    opacity: 0.5;
}

.empty-state-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.75rem 0;
}

.empty-state-description {
    font-size: 1rem;
    color: var(--text-secondary);
    margin: 0 0 2rem 0;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

.empty-state-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
    max-width: 300px;
    margin: 0 auto;
}

.btn-empty-primary {
    width: 100%;
    padding: 1rem 1.5rem;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-empty-primary:hover {
    background: var(--accent-secondary);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow);
}

.btn-empty-secondary {
    width: 100%;
    padding: 0.75rem 1.5rem;
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-empty-secondary:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* Recently Created Section - De-emphasized */
.recently-created-section {
    opacity: 0.85;
}

.recently-created-content {
    width: 100%;
}

.recent-group {
    margin-bottom: 2rem;
}

.recent-group:last-child {
    margin-bottom: 0;
}

.recent-group-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0 0 0.75rem 0;
}

.recent-items-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.recent-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--bg-card);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    transition: all 0.15s;
}

.recent-item:hover {
    background: var(--bg-secondary);
    border-color: var(--accent-primary);
    transform: translateX(4px);
}

.recent-item-clickable {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

.recent-item-actions {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.recent-item-btn {
    width: 1.75rem;
    height: 1.75rem;
    padding: 0;
    border: none;
    border-radius: 6px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, color 0.15s;
}

.recent-item-btn:hover {
    background: var(--accent-primary);
    color: white;
}

.recent-item-delete:hover {
    background: #c62828;
    color: white;
}

.recent-item-icon {
    font-size: 1.1rem;
    opacity: 0.7;
}

.recent-item-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.recent-item-title {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

.recent-item-date {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.empty-message {
    color: var(--text-secondary);
    font-size: 0.95rem;
    padding: 2rem;
    text-align: center;
}

.empty-message.subtle {
    color: var(--text-tertiary);
    font-size: 0.85rem;
    padding: 1rem;
}

/* Onboarding Rail */
.onboarding-rail {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 8px var(--shadow-soft);
    border: 2px solid var(--accent-primary);
}

.onboarding-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    flex-wrap: wrap;
}

.onboarding-title {
    font-size: 1.2rem;
    color: var(--accent-primary);
    margin: 0;
    font-weight: 600;
}

.onboarding-steps {
    display: flex;
    gap: 1.5rem;
    flex: 1;
    flex-wrap: wrap;
}

.onboarding-step {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    transition: all 0.2s;
}

.onboarding-step.completed {
    background: var(--accent-primary);
    color: white;
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    font-size: 0.85rem;
    font-weight: 600;
}

.onboarding-step.completed .step-number {
    background: rgba(255, 255, 255, 0.4);
}

.step-text {
    font-size: 0.9rem;
    font-weight: 500;
}

.btn-dismiss {
    padding: 0.5rem 1rem;
    background: transparent;
    color: var(--accent-primary);
    border: 2px solid var(--accent-primary);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-dismiss:hover {
    background: var(--accent-primary);
    color: white;
}

/* Primary CTA Section */
.primary-cta-section {
    display: flex;
    justify-content: center;
    padding: 2rem 0 1rem 0;
}

.btn-primary-large {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 16px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 12px var(--shadow);
}

.btn-primary-large:hover {
    background: var(--accent-secondary);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px var(--shadow);
}

.btn-primary-large:active {
    transform: translateY(0);
}

.btn-icon {
    font-size: 1.2rem;
}

/* Secondary Actions Section */
.secondary-actions-section {
    display: flex;
    justify-content: center;
    padding: 0.5rem 0 2rem 0;
}

.secondary-actions-grid {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.btn-secondary-small {
    padding: 0.5rem 1rem;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-secondary-small:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: rgba(127, 168, 154, 0.05);
}

/* Action Grid Section */
.action-grid-section {
    margin-top: 1rem;
}

.section-title {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin: 0 0 1.5rem 0;
    font-weight: 600;
}

.action-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.action-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 2px 8px var(--shadow-soft);
    cursor: pointer;
    transition: all 0.2s;
    border: 2px solid transparent;
}

.action-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px var(--shadow);
    border-color: var(--accent-primary);
}

.action-card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
}

.action-card-title {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    font-weight: 600;
}

.action-card-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

/* Content Section */
.content-section {
    margin-top: 2rem;
}

.content-section-group {
    margin-bottom: 3rem;
}

.content-section-title {
    font-size: 1.3rem;
    color: var(--accent-primary);
    margin: 0 0 1.5rem 0;
    font-weight: 600;
}

/* Responsive adjustments for new layout */
@media (max-width: 768px) {
    .page-title {
        font-size: 2rem;
    }

    .continue-studying-card {
        flex-direction: column;
        align-items: flex-start;
    }

    .btn-resume {
        width: 100%;
    }

    .hubs-grid {
        grid-template-columns: 1fr;
    }

    .header-content {
        flex-direction: column;
    gap: 1.5rem;
    }

    .header-actions {
        width: 100%;
        justify-content: flex-end;
    }

    .create-dropdown {
        right: 0;
        left: 0;
        min-width: auto;
    }
}

.content-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px var(--shadow-soft);
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    border: 1px solid var(--border-color);
}

.content-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px var(--shadow);
}

.content-card-header {
    flex: 1;
}

.content-card-title {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    font-weight: 600;
}

.content-card-meta {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

.hub-card {
    position: relative;
}

.hub-card.empty {
    opacity: 0.8;
    border: 2px dashed var(--border-color);
}

.card-icons {
    font-size: 1.2rem;
    margin: 0.5rem 0;
}

.card-status {
    font-size: 0.85rem;
    margin: 0.5rem 0 0 0;
    font-weight: 500;
}

.card-status.active {
    color: var(--accent-primary);
}

.card-status.empty {
    color: var(--text-secondary);
    font-style: italic;
}

.card-type-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(127, 168, 154, 0.1);
    color: var(--accent-primary);
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.content-card-actions {
    display: flex;
    gap: 0.5rem;
}

/* Empty State */
.empty-state-panel {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 4rem 2rem;
    text-align: center;
    box-shadow: 0 2px 8px var(--shadow-soft);
    margin: 2rem 0;
    border: 1px solid var(--border-color);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    opacity: 0.6;
}

.empty-state-headline {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
    font-weight: 600;
}

.empty-state-description {
    font-size: 1rem;
    color: var(--text-secondary);
    margin: 0 0 2rem 0;
    line-height: 1.6;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.empty-state-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.empty-state-secondary-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.btn-secondary-text {
    padding: 0.6rem 1.2rem;
    background: transparent;
    color: var(--accent-primary);
    border: 2px solid var(--accent-primary);
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-secondary-text:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateY(-1px);
}

/* Loading and Error States */
.loading-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
    font-size: 1rem;
}

.lockin-loading-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 280px;
}

.error-state {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 2px 8px var(--shadow-soft);
    border: 1px solid var(--border-color);
}

.error-message {
    color: var(--error-color);
    font-size: 1rem;
    margin: 0 0 0.5rem 0;
}

.error-hint {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin: 0;
}

.card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 2px 8px var(--shadow-soft);
    transition: all 0.2s;
    border: 1px solid var(--border-color);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px var(--shadow);
}

.btn {
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s;
    margin: 0.25rem;
}

.btn-primary {
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 12px;
    padding: 0.6rem 1.2rem;
    font-weight: 500;
}

.btn-primary:hover {
    background: var(--accent-secondary);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px var(--shadow);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-success {
    background: #28a745;
    color: white;
}

input, textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    margin-bottom: 1rem;
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

#test-generation-loading-modal {
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    z-index: 10000;
    cursor: not-allowed;
}

#test-generation-loading-modal .modal-content {
    cursor: default;
    pointer-events: auto;
}

.grading-modal-content {
    text-align: center;
    pointer-events: none;
}

.grading-modal-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
}

.grading-modal-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

.modal-content {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 12px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.guided-flow-modal {
    max-width: 500px;
}

.modal-title {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    font-weight: 600;
}

.modal-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin: 0 0 2rem 0;
}

.lockin-share-modal .share-modal-body {
    margin: 1.25rem 0;
}

.lockin-share-modal .share-modal-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
}

.lockin-share-modal .share-modal-checkbox input {
    width: 1.1rem;
    height: 1.1rem;
}

.lockin-share-modal .share-modal-link-row {
    margin-top: 1rem;
}

.lockin-share-modal .share-modal-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.lockin-share-modal .share-modal-link-wrap {
    display: flex;
    gap: 0.5rem;
}

.lockin-share-modal .share-modal-link-wrap input {
    flex: 1;
    min-width: 0;
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
}

.lockin-share-modal .btn-copy-link {
    padding: 0.5rem 1rem;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
}

.lockin-share-modal .btn-copy-link:hover {
    background: var(--accent-secondary);
}

.hidden {
    display: none !important;
}

/* Study guide modal */
.lockin-study-guide-modal .modal-content {
    max-width: 640px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}
.lockin-study-guide-modal .study-guide-modal-body {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    overflow: auto;
}
.lockin-study-guide-modal .study-guide-hint {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin: 0;
}
.lockin-study-guide-modal .study-guide-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}
.lockin-study-guide-modal .study-guide-focus-input {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background: var(--bg-card);
    color: var(--text-primary);
}
.lockin-study-guide-modal .study-guide-focus-input:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}
.lockin-study-guide-modal .study-guide-focus-hint {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin: 0.25rem 0 0 0;
}
.lockin-study-guide-modal .study-guide-generate-row {
    margin: 0.25rem 0 0 0;
}
.lockin-study-guide-modal .study-guide-loading {
    text-align: center;
    padding: var(--space-xl);
}
.lockin-study-guide-modal .study-guide-loading p {
    margin: var(--space-sm) 0 0 0;
    color: var(--text-secondary);
}
.lockin-study-guide-modal .study-guide-error {
    padding: 0.75rem 1rem;
    background: rgba(220, 53, 69, 0.1);
    border: 1px solid rgba(220, 53, 69, 0.3);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.9rem;
}
.lockin-study-guide-modal .study-guide-empty {
    padding: var(--space-xl);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
}
.lockin-study-guide-modal .study-guide-result {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    min-height: 0;
}
.lockin-study-guide-modal .study-guide-preview {
    max-height: 55vh;
    overflow: auto;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.9rem;
    line-height: 1.55;
}
.lockin-study-guide-modal .study-guide-preview .sg-preview-h1 { font-size: 1.25rem; margin: 1rem 0 0.5rem 0; font-weight: 700; }
.lockin-study-guide-modal .study-guide-preview .sg-preview-h2 { font-size: 1.1rem; margin: 1rem 0 0.5rem 0; font-weight: 600; }
.lockin-study-guide-modal .study-guide-preview .sg-preview-h3 { font-size: 1rem; margin: 0.75rem 0 0.35rem 0; font-weight: 600; }
.lockin-study-guide-modal .study-guide-preview .sg-preview-ul,
.lockin-study-guide-modal .study-guide-preview .sg-preview-ol { margin: 0.5rem 0; padding-left: 1.5rem; }
.lockin-study-guide-modal .study-guide-preview .sg-preview-ul { list-style-type: disc; }
.lockin-study-guide-modal .study-guide-preview .sg-preview-ol { list-style-type: decimal; }
.lockin-study-guide-modal .study-guide-preview li { margin: 0.25rem 0; }
.lockin-study-guide-modal .study-guide-text.hidden {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}
.lockin-study-guide-modal .study-guide-title-label {
    margin-top: 0.5rem;
}
.lockin-study-guide-modal .study-guide-actions {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.study-guide-view {
    max-width: min(1200px, 92vw);
    margin: 0 auto;
    padding: 0;
    min-height: 100%;
}
.study-guide-view-header-sticky {
    position: sticky;
    top: 0;
    z-index: 10;
    background: var(--bg-page, var(--bg-card));
    padding: var(--space-md) 0;
    margin-bottom: var(--space-lg);
    border-bottom: 1px solid var(--border-color);
}
.study-guide-view-header-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-md);
}
.study-guide-view-title {
    font-size: 1.5rem;
    margin: 0;
    flex: 1;
    min-width: 0;
    color: var(--text-primary);
}
.study-guide-view-actions {
    display: flex;
    gap: var(--space-sm);
}
.study-guide-view-actions .btn {
    white-space: nowrap;
}
.study-guide-view-body {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    padding-bottom: var(--space-2xl);
}
.study-guide-toc {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--space-lg);
}
.study-guide-toc-title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 var(--space-sm) 0;
    color: var(--text-primary);
}
.study-guide-toc-nav {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}
.study-guide-toc-link {
    color: var(--accent-primary);
    text-decoration: none;
    font-size: 0.9rem;
}
.study-guide-toc-link:hover {
    text-decoration: underline;
}
.study-guide-toc-link.sg-toc-h2 { padding-left: 0; }
.study-guide-toc-link.sg-toc-h3 { padding-left: 1rem; }

.study-guide-view-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--space-2xl);
    line-height: 1.65;
    overflow-wrap: break-word;
}
.study-guide-view-content .sg-view-h1 { font-size: 1.35rem; margin: 1.5rem 0 0.75rem 0; font-weight: 700; }
.study-guide-view-content .sg-view-h1:first-child { margin-top: 0; }
.study-guide-view-content .sg-view-h2 { font-size: 1.15rem; margin: 1.25rem 0 0.5rem 0; font-weight: 600; }
.study-guide-view-content .sg-view-h3 { font-size: 1.05rem; margin: 1rem 0 0.4rem 0; font-weight: 600; }
.study-guide-view-content .sg-view-ul,
.study-guide-view-content .sg-view-ol { margin: 0.5rem 0; padding-left: 1.5rem; }
.study-guide-view-content .sg-view-ul { list-style-type: disc; }
.study-guide-view-content .sg-view-ol { list-style-type: decimal; }
.study-guide-view-content li { margin: 0.25rem 0; }

.study-guide-qa-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--space-xl);
}
.study-guide-qa-card-title {
    font-size: 1.1rem;
    margin: 0 0 var(--space-sm) 0;
    color: var(--text-primary);
}
.study-guide-qa-hint {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0 0 var(--space-md) 0;
}
.study-guide-qa-form {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}
.study-guide-question-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background: var(--bg-card);
    color: var(--text-primary);
}
.study-guide-question-input:focus {
    outline: none;
    border-color: var(--accent-primary);
}
.study-guide-qa-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}
.study-guide-qa-item {
    padding: var(--space-md);
    border-radius: 8px;
    line-height: 1.5;
}
.study-guide-qa-question {
    background: rgba(102, 126, 234, 0.1);
    border-left: 4px solid var(--accent-primary);
}
.study-guide-qa-answer {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
}
.study-guide-qa-loading {
    opacity: 0.7;
    font-style: italic;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background: var(--bg-card);
    color: var(--text-primary);
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.form-hint {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-style: italic;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
}

.close {
    float: right;
    font-size: 1.5rem;
    cursor: pointer;
    color: #999;
}

.close:hover {
    color: var(--text-primary);
}

.flashcard {
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
    background: #f8f9fa;
}

.flashcard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.flashcard-actions {
    display: flex;
    gap: 0.5rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }

    header h1 {
        font-size: 1.5rem;
    }

    .back-button {
        margin-bottom: 0.75rem;
    }

    .back-text {
        display: none;
    }

    .back-icon {
        font-size: 1.5rem;
    }

    .action-grid {
        grid-template-columns: 1fr;
    }

    .content-cards-grid {
        grid-template-columns: 1fr;
    }

    .empty-state-secondary-actions {
        flex-direction: column;
        width: 100%;
    }

    .btn-secondary-text {
        width: 100%;
    }

    .onboarding-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .onboarding-steps {
        width: 100%;
        flex-direction: column;
    }

    .onboarding-step {
        width: 100%;
    }

    .secondary-actions-grid {
        flex-direction: column;
        width: 100%;
    }

    .btn-secondary-small {
        width: 100%;
    }

    .guided-flow-modal {
        width: 95%;
        padding: 1.5rem;
    }
}

.study-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: 0 4px 6px var(--shadow);
}

.card-progress {
    text-align: center;
    color: var(--accent-primary);
    font-weight: bold;
    margin-bottom: 1rem;
}

.flashcard-study {
    min-height: 300px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.card-side {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
    border: 2px solid #e0e0e0;
}

.card-side h3 {
    color: var(--accent-primary);
    margin-bottom: 1rem;
}

.study-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

.test-question {
    margin: 1rem 0;
}

.test-result {
    background: #e7f3ff;
    padding: 1rem;
    border-radius: 8px;
    margin: 1rem 0;
}

.matching-mode {
    padding: 1rem;
}

.matching-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.matching-header h3 {
    margin: 0;
    color: var(--accent-primary);
}

.matching-timer {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    font-weight: 600;
    color: var(--accent-primary);
}

#match-progress {
    color: var(--text-primary);
}

.matching-complete {
    margin-top: 2rem;
    padding: 2rem;
    background: var(--accent-gradient);
    border-radius: 12px;
    text-align: center;
}

.matching-complete-content {
    color: white;
}

.matching-complete-content h3 {
    color: white;
    font-size: 2rem;
    margin-bottom: 1rem;
}

.matching-time-result {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 1.5rem 0;
    background: rgba(255, 255, 255, 0.2);
    padding: 1rem 2rem;
    border-radius: 8px;
    display: inline-block;
}

.matching-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 1rem;
}

.matching-column {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 8px;
    min-height: 400px;
}

.match-item {
    background: var(--bg-card);
    padding: 1rem;
    margin: 0.5rem 0;
    border-radius: 8px;
    cursor: move;
    border: 2px solid #e0e0e0;
    transition: all 0.2s;
}

.match-item:hover {
    border-color: var(--accent-primary);
    transform: translateX(5px);
}

.match-item[draggable="true"] {
    cursor: grab;
}

.match-item:active {
    cursor: grabbing;
}

/* Learn Mode Styles */
.learn-mode {
    max-width: 800px;
    margin: 0 auto;
}

.learn-start {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    box-shadow: 0 4px 6px var(--shadow);
}

.learn-start-avatar,
.learn-complete-avatar {
    margin-bottom: 1rem;
}

.learn-start-avatar .learn-avatar-img,
.learn-complete-avatar .learn-avatar-img {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    object-fit: contain;
    border: 2px solid var(--border-color);
}

.learn-goal {
    font-size: var(--text-xl);
    color: var(--accent-primary);
    margin: var(--space-xl) 0;
    font-weight: 600;
}

.learn-start-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.learn-start-primary { min-width: 180px; }

.learn-start-secondary {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    margin: 0.25rem;
}

.learn-question {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px var(--shadow);
    min-height: 400px;
    display: flex;
    flex-direction: column;
}

.learn-progress-bar {
    width: 100%;
    background: #e0e0e0;
    border-radius: 12px;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 48px;
}

.learn-progress-bar .progress-fill {
    height: 48px;
    min-height: 48px;
    flex: 0 0 48px;
    border-radius: 12px;
}

.progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    transition: width 0.3s ease;
    border-radius: 20px;
}

.learn-progress-labels {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.5rem;
    padding: 0 0.25rem;
    font-size: 1rem;
}

.learn-progress-labels .progress-text {
    font-weight: 600;
    color: var(--text-primary);
}

.learn-progress-labels .session-xp {
    font-weight: 600;
    color: var(--accent, #2563eb);
}

.learn-prompt {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 2rem 0;
}

.learn-prompt h3 {
    font-size: 2rem;
    color: var(--text-primary);
    text-align: center;
}

.learn-answer-area {
    margin: 2rem 0;
    min-height: 150px;
}

.mc-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mc-option {
    padding: 1.2rem;
    background: #f8f9fa;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    text-align: left;
    transition: all 0.2s;
}

.mc-option:hover {
    border-color: var(--accent-primary);
    background: #f0f4ff;
}

.mc-option.selected {
    border-color: var(--accent-primary);
    background: #e7f3ff;
    font-weight: 600;
}

.learn-input {
    width: 100%;
    padding: 1.2rem;
    font-size: 1.2rem;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    text-align: center;
}

.learn-input:focus {
    border-color: var(--accent-primary);
    outline: none;
}

.learn-actions {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
}

.learn-feedback {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    box-shadow: 0 4px 6px var(--shadow);
    min-height: 400px;
    display: flex;
    flex-direction: column;
}

.learn-feedback.correct {
    border-top: 5px solid #28a745;
}

.learn-feedback.incorrect {
    border-top: 5px solid #dc3545;
}

.feedback-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.feedback-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.learn-feedback.correct .feedback-icon {
    color: #28a745;
}

.learn-feedback.incorrect .feedback-icon {
    color: #dc3545;
}

.correct-answer {
    margin-top: 2rem;
    padding: 1.5rem;
    background: #f8f9fa;
    border-radius: 8px;
    max-width: 600px;
}

.feedback-justification {
    margin-top: 1rem;
    padding: 1rem 1.25rem;
    background: rgba(0, 0, 0, 0.04);
    border-radius: 8px;
    max-width: 600px;
    text-align: left;
    font-size: 0.95rem;
}

.feedback-justification strong {
    display: inline;
}

.correct-answer p {
    margin: 0.5rem 0;
}

.learn-complete {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    box-shadow: 0 4px 6px var(--shadow);
}

.learn-complete-avatar .learn-avatar-img {
    width: 80px;
    height: 80px;
}

.complete-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.complete-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
    max-width: 300px;
    margin-left: auto;
    margin-right: auto;
}

/* Learn Mode Settings */
.learn-settings {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px var(--shadow);
    max-width: 700px;
    margin: 0 auto;
}

.settings-section {
    margin-bottom: 2.5rem;
}

.settings-section h3 {
    color: var(--accent-primary);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.settings-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.setting-option {
    display: flex;
    flex-direction: column;
    padding: 1.2rem;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.setting-option:hover {
    border-color: var(--accent-primary);
    background: #f8f9fa;
}

.setting-option input[type="radio"] {
    margin-right: 0.75rem;
    cursor: pointer;
    width: auto;
}

.setting-option span {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.setting-option small {
    color: #666;
    font-size: 0.85rem;
}

.setting-option input[type="checkbox"] {
    margin-right: 0.75rem;
    cursor: pointer;
    width: auto;
}

.ai-grading-selected {
    margin-top: 0.5rem;
    font-weight: 600;
    color: var(--accent, #2563eb);
}

.settings-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

/* Larger Multiple Choice Options */
.mc-option-large {
    padding: 1.5rem 2rem;
    background: #f8f9fa;
    border: 3px solid #e0e0e0;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1.1rem;
    text-align: left;
    transition: all 0.2s;
    margin-bottom: 1rem;
    width: 100%;
    min-height: 70px;
    display: flex;
    align-items: center;
}

.mc-option-large:hover {
    border-color: var(--accent-primary);
    background: #f0f4ff;
    transform: scale(1.02);
}

.mc-option-large.selected {
    border-color: var(--accent-primary);
    background: #e7f3ff;
    font-weight: 600;
    transform: scale(1.02);
    box-shadow: 0 4px 8px rgba(102, 126, 234, 0.2);
}

.mc-option-large:active {
    transform: scale(0.98);
}

.mc-option-content {
    width: 100%;
    line-height: 1.5;
}

/* Flashcard Mode Styles */
.flashcard-mode {
    max-width: 900px;
    margin: 0 auto;
}

.flashcard-mode-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
}

.flashcard-mode-header h2 {
    color: var(--accent-primary);
    margin: 0;
}

.flashcard-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    background: var(--bg-card);
    padding: 1rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
    flex-wrap: wrap;
}

.mode-switcher {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.flashcard-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.autoplay-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
}

.autoplay-toggle input[type="checkbox"] {
    width: auto;
    margin: 0;
    cursor: pointer;
}

.flashcard-study-container {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px var(--shadow);
    min-height: 500px;
    display: flex;
    flex-direction: column;
}

.study-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.study-header h2 {
    color: var(--accent-primary);
    margin: 0;
}

.study-controls {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.flashcard-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 350px;
    background: var(--bg-card);
    border: 3px solid var(--accent-primary);
    border-radius: 16px;
    padding: 3rem;
    margin: 2rem 0;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    box-shadow: 0 4px 16px var(--shadow);
}

.flashcard-card:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 16px var(--shadow);
}

.card-side-label {
    position: absolute;
    top: 1rem;
    left: 1rem;
    font-size: 0.9rem;
    color: var(--accent-primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.card-content {
    font-size: 1.8rem;
    text-align: center;
    color: var(--text-primary);
    line-height: 1.6;
    word-wrap: break-word;
    max-width: 100%;
}

.flip-hint {
    position: absolute;
    bottom: 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-style: italic;
}

.flashcard-navigation {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
    align-items: center;
}

.card-counter {
    font-weight: 600;
    color: var(--accent-primary);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn:disabled:hover {
    background: #6c757d;
}

/* Loading Spinner */
.loading-spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 1.5rem auto;
}

.loading-spinner-large {
    border: 5px solid var(--border-color);
    border-top: 5px solid var(--accent-primary);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
    margin: 2rem auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Test Generation Modal */
.test-generation-modal {
    text-align: center;
    padding: 3rem 2.5rem;
    max-width: 500px;
    box-shadow: 0 8px 32px var(--shadow);
}

.test-generation-header {
    margin-bottom: 2rem;
}

.test-generation-header h3 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.test-generation-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.test-generation-message {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
}

.test-generation-progress {
    width: 100%;
    margin-top: 1rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 4px;
    width: 0%;
    animation: progress-pulse 2s ease-in-out infinite;
}

@keyframes progress-pulse {
    0% { width: 0%; }
    50% { width: 70%; }
    100% { width: 100%; }
}

/* Test Taker Styles */
.test-taker {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px var(--shadow);
    max-width: 900px;
    margin: 0 auto;
}

.test-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #e9ecef;
}

.test-progress {
    flex: 1;
}

.test-progress span {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 1rem;
    color: #666;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #e9ecef;
    border-radius: 4px;
    overflow: hidden;
}

.test-controls {
    display: flex;
    gap: 0.5rem;
}

.btn-small {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

.test-question-container {
    min-height: 400px;
    margin: 2rem 0;
}

.question-card {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 2rem;
    border: 2px solid #e9ecef;
}

.question-card h3,
.question-card .question-text {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
    line-height: 1.6;
}

.question-card .question-text {
    white-space: pre-wrap;
    word-break: break-word;
}

.quote-id-quote {
    margin-bottom: 1.25rem;
}

.quote-id-quote .question-quote,
.question-card .question-quote {
    display: block;
    margin: 0.5rem 0 1rem;
    padding: 1rem 1.25rem;
    background: #eef1f7;
    border-left: 4px solid var(--accent-primary);
    border-radius: 6px;
    font-style: italic;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-break: break-word;
}

.mc-option-row {
    display: block;
    margin: 0.5rem 0;
    cursor: pointer;
    line-height: 1.5;
}

.mc-option-row input[type="radio"] {
    vertical-align: middle;
    margin: 0 0.5rem 0 0;
}

.tf-options {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.tf-option {
    padding: 1.5rem 3rem;
    background: var(--bg-card);
    border: 3px solid #dee2e6;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1.2rem;
    font-weight: 600;
}

.tf-option:hover {
    border-color: var(--accent-primary);
    background: #f0f4ff;
    transform: scale(1.05);
}

.tf-option.selected {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.answer-input {
    width: 100%;
    min-height: 150px;
    padding: 1rem;
    border: 2px solid #dee2e6;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
}

.answer-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.test-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 2px solid #e9ecef;
}

.question-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: 0.5rem;
    margin-top: 1rem;
}

.question-list-item {
    padding: 0.8rem;
    background: var(--bg-card);
    border: 2px solid #dee2e6;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
    transition: all 0.2s;
}

.question-list-item:hover {
    border-color: var(--accent-primary);
    transform: scale(1.05);
}

.question-list-item.answered {
    background: #d4edda;
    border-color: #28a745;
}

.question-list-item.flagged {
    border-color: #ffc107;
    background: #fff3cd;
}

.question-list-item.current {
    border-color: var(--accent-primary);
    background: #f0f4ff;
    font-weight: bold;
}

/* Test Results */
.test-results {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px var(--shadow);
    max-width: 900px;
    margin: 0 auto;
}

.results-summary {
    text-align: center;
    margin-bottom: 2rem;
    padding: 2rem;
    background: var(--accent-gradient);
    border-radius: 12px;
    color: white;
}

.score-display h1 {
    font-size: 4rem;
    margin: 0.5rem 0;
}

.ai-graded-label {
    font-size: var(--text-sm);
    opacity: 0.85;
    margin-top: var(--space-sm);
}

.score-display .points-earned {
    font-weight: 600;
    margin-top: var(--space-sm);
}

.results-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
    margin: var(--space-2xl) 0;
}

.results-cta-primary {
    min-width: 200px;
    padding: var(--space-md) var(--space-xl);
    font-size: var(--text-lg);
}

.results-actions-secondary {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.results-details {
    margin-top: 2rem;
}

.result-item {
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    border-left: 4px solid;
}

.result-item.correct {
    background: #d4edda;
    border-color: #28a745;
}

.result-item.incorrect {
    background: #f8d7da;
    border-color: #dc3545;
}

.result-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.result-icon {
    font-size: 1.5rem;
}

.result-answer {
    margin-top: 1rem;
}

.result-answer p {
    margin: 0.5rem 0;
}

.partial-credit {
    color: #856404;
    font-weight: 600;
}

.feedback {
    color: #721c24;
    font-style: italic;
}

.explanation {
    margin-top: 0.5rem;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 6px;
}

/* Test Config */
.test-config {
    display: grid;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.config-section {
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 8px;
}

.config-section h4 {
    margin-bottom: 0.75rem;
    color: var(--accent-primary);
}

.config-section label {
    display: block;
    margin: 0.5rem 0;
}

.config-section input[type="number"],
.config-section select {
    width: 100%;
    padding: 0.5rem;
    margin-top: 0.25rem;
    border: 1px solid #dee2e6;
    border-radius: 4px;
}

.config-section input[type="checkbox"],
.config-section input[type="radio"] {
    margin-right: 0.5rem;
}

/* Translation Viewer Styles */
.translation-view-container {
    display: flex;
    gap: 1.5rem;
    margin-top: 1rem;
}

.translation-view-container.stacked {
    flex-direction: column;
}

.translation-view-container.side-by-side {
    flex-direction: row;
}

.translation-column {
    flex: 1;
    background: var(--bg-card);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    min-height: 400px;
}

.translation-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid #e9ecef;
}

.translation-header h3 {
    margin: 0;
    color: var(--accent-primary);
    font-size: 1.2rem;
}

.translation-content {
    line-height: 1.8;
    font-size: 1rem;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-wrap: break-word;
    max-height: 600px;
    overflow-y: auto;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 4px;
    border: 1px solid #dee2e6;
}

.translation-content::-webkit-scrollbar {
    width: 8px;
}

.translation-content::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

.translation-content::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 4px;
}

.translation-content::-webkit-scrollbar-thumb:hover {
    background: var(--accent-secondary);
}

/* Breakdown (translation) editor – visual polish */
#main-content:has(.translation-editor) {
    max-width: 960px;
}

.translation-editor {
    padding: 0 var(--space-xs);
}

.translation-editor > h2 {
    font-size: var(--text-2xl);
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    margin: 0 0 var(--space-xs) 0;
    position: relative;
    padding-bottom: 0.5rem;
}

.translation-editor > h2::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 3rem;
    height: 3px;
    background: var(--accent-gradient);
    border-radius: 3px;
}

.translation-editor > .text-muted {
    font-size: var(--text-base);
    line-height: 1.5;
    margin-bottom: var(--space-xl) !important;
    color: var(--text-secondary);
}

.translation-editor .card {
    border-radius: 14px;
    padding: var(--space-xl);
    box-shadow: 0 2px 12px var(--shadow-soft);
    border: 1px solid var(--border-color);
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.translation-editor .card:hover {
    transform: none;
    box-shadow: 0 4px 20px var(--shadow);
}

.translation-editor .card h3 {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--space-md) 0;
    letter-spacing: -0.01em;
}

.translation-editor .card input[type="text"],
.translation-editor .card select,
.translation-editor .card textarea {
    width: 100%;
    padding: 0.6rem 0.75rem;
    margin-top: 0.35rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: var(--text-sm);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.translation-editor .card input[type="text"]:focus,
.translation-editor .card select:focus,
.translation-editor .card textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(127, 168, 154, 0.15);
}

.translation-editor .card label {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
}

.translation-editor .card .btn {
    margin: 0.25rem 0.25rem 0.25rem 0;
    border-radius: 10px;
    padding: 0.6rem 1.25rem;
    font-weight: 500;
}

.translation-editor .card .btn-primary {
    box-shadow: 0 2px 8px rgba(127, 168, 154, 0.25);
}

.translation-editor .card .btn-primary:hover {
    box-shadow: 0 4px 12px rgba(127, 168, 154, 0.35);
}

.translation-editor .card:first-of-type {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-md);
}

.translation-editor .card:first-of-type #translation-title {
    flex: 1 1 220px;
    min-width: 0;
}

.translation-editor #translation-title {
    font-size: var(--text-base);
    padding: 0.65rem 0.85rem;
}

.translation-view-container {
    margin-top: var(--space-xl);
    gap: var(--space-lg);
    display: flex;
}

.translation-editor .translation-column {
    border-radius: 14px;
    padding: var(--space-lg);
    box-shadow: 0 2px 12px var(--shadow-soft);
    border: 1px solid var(--border-color);
    min-height: 360px;
    display: flex;
    flex-direction: column;
    transition: box-shadow 0.2s ease;
}

.translation-editor .translation-column:hover {
    box-shadow: 0 4px 20px var(--shadow);
}

.translation-editor .translation-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--space-md);
    margin-bottom: var(--space-md);
}

.translation-editor .translation-header h3 {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--accent-primary);
    margin: 0;
}

.translation-editor .translation-content {
    flex: 1;
    border-radius: 10px;
    padding: var(--space-md);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    min-height: 280px;
    font-size: var(--text-sm);
    line-height: 1.7;
}

.translation-editor .translation-content:empty,
.translation-editor .translation-content:has(*:only-child) {
    color: var(--text-tertiary);
    font-style: italic;
}

.translation-followup-card h3 {
    margin: 0 0 var(--space-sm) 0;
}

.translation-followup-thread {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.translation-followup-item {
    padding: var(--space-md);
    background: var(--bg-primary);
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.translation-followup-item .followup-q {
    margin: 0 0 0.35rem 0;
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.translation-followup-item .followup-a {
    margin: 0;
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-wrap: break-word;
}

.translation-followup-item.translation-followup-loading .followup-a {
    font-style: italic;
}

/* Hub Editor 2-Column Layout */
.homepage-header,
.hub-editor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding: 0 1.5rem;
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.homepage-title,
.hub-editor-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.02em;
}

.hub-editor-title {
    position: relative;
    padding-bottom: 0.375rem;
}
.hub-editor-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 2.5rem;
    height: 2px;
    background: var(--accent-gradient);
    border-radius: 2px;
}

.hub-editor-container {
    display: grid;
    grid-template-columns: minmax(0, 380px) minmax(0, 1fr);
    gap: var(--space-2xl);
    max-width: 100%;
    margin: 0 auto;
    padding: var(--space-lg) 0 var(--space-3xl);
    min-height: 50vh;
    align-items: start;
}

.hub-editor-left {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.hub-editor-right {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

/* Hub Cards */
.hub-card {
    background: var(--bg-card);
    border-radius: 14px;
    padding: 1.5rem 1.5rem;
    box-shadow: 0 1px 3px var(--shadow-soft);
    border: 1px solid var(--border-color);
    border-left: 3px solid rgba(127, 168, 154, 0.4);
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.hub-card:hover {
    box-shadow: 0 4px 14px var(--shadow);
    border-left-color: var(--accent-primary);
}

.hub-editor-left .hub-card:first-child .card-title,
.hub-editor-left .hub-card:nth-child(2) .card-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-title {
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin: 0 0 1rem 0;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

/* Hub Settings Card */
.hub-settings-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.hub-title-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.hub-title-input::placeholder {
    color: var(--text-tertiary);
}

.hub-title-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(127, 168, 154, 0.2);
}

.hub-settings-actions {
    display: flex;
    gap: 0.625rem;
    align-items: center;
    flex-wrap: wrap;
}

.hub-settings-actions .btn {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    border-radius: 10px;
    font-weight: 500;
}

.hub-visibility-row {
    padding: 0.25rem 0;
}

.hub-visibility-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.hub-visibility-toggle input {
    width: 1.1rem;
    height: 1.1rem;
}

.public-hub-card {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(127, 168, 154, 0.06) 100%);
}

.btn-copy-public-hub {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-copy-public-hub:hover {
    background: var(--accent-secondary);
    color: white;
}

.lockin-copying-modal .lockin-copying-modal-content {
    text-align: center;
    min-width: 280px;
}

.lockin-copying-modal-text {
    margin: 0 0 1rem 0;
    font-size: 1rem;
    color: var(--text-primary);
}

.lockin-copying-spinner {
    width: 32px;
    height: 32px;
    margin: 0 auto;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: lockin-copying-spin 0.8s linear infinite;
}

@keyframes lockin-copying-spin {
    to { transform: rotate(360deg); }
}

.discover-section .discover-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.discover-subsection {
    margin-bottom: 0.5rem;
}

.discover-subtitle {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0 0 0.75rem 0;
}

.discover-grid.discover-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.discover-item-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.75rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
}

.discover-item-title {
    flex: 1;
    min-width: 0;
    font-weight: 500;
    color: var(--text-primary);
}

.discover-item-card .btn-copy-public-item {
    padding: 0.5rem 0.75rem;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
}

.discover-item-card .btn-copy-public-item:hover {
    background: var(--accent-secondary);
}

/* Knowledge Base Card */
.knowledge-base-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.knowledge-files-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.knowledge-file-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--bg-primary);
    border-radius: 10px;
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
    transition: border-color 0.2s, background 0.2s;
}

.knowledge-file-item:hover {
    border-color: var(--accent-primary);
    background: rgba(127, 168, 154, 0.04);
}

.file-icon {
    font-size: 1rem;
    opacity: 0.85;
}

.file-name {
    color: var(--text-primary);
    font-weight: 500;
}

.knowledge-display-scrollable {
    max-height: 420px;
    overflow-y: auto;
    padding: 1rem 1.25rem;
    background: var(--bg-primary);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    white-space: pre-wrap;
    word-wrap: break-word;
    line-height: 1.65;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.knowledge-display-scrollable::-webkit-scrollbar {
    width: 8px;
}

.knowledge-display-scrollable::-webkit-scrollbar-track {
    background: var(--bg-primary);
    border-radius: 4px;
}

.knowledge-display-scrollable::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.knowledge-display-scrollable::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

.knowledge-empty-state {
    color: var(--text-tertiary);
    font-style: italic;
    text-align: center;
    padding: 2.5rem 1.5rem;
    margin: 0;
    background: rgba(127, 168, 154, 0.04);
    border-radius: 12px;
    border: 1px dashed var(--border-color);
}

/* Create Content Card */
.create-content-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.btn-create-action {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
}

.btn-create-action:hover {
    border-color: var(--accent-primary);
    background: rgba(127, 168, 154, 0.1);
    transform: translateY(-1px);
}

.action-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}

/* Content Sections */
.hub-content-sections {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.content-section-card {
    padding: 1.25rem;
}

.content-section-actions {
    margin-top: 1rem;
}

.content-section-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.content-items-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.content-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    transition: all 0.2s;
}

.content-item:hover {
    border-color: var(--accent-primary);
    transform: translateX(2px);
}

.content-item-info {
    flex: 1;
    min-width: 0;
}

.content-item-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.content-item-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: 0;
}

.btn-open {
    padding: 0.5rem 1rem;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    flex-shrink: 0;
}

.btn-open:hover {
    background: var(--accent-secondary);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px var(--shadow);
}

.content-item-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.btn-danger {
    background: var(--error-color);
    color: white;
    padding: 0.5rem 0.75rem;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    flex-shrink: 0;
}

.btn-danger:hover {
    background: #c77a7a;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px var(--shadow);
}

.empty-content-message {
    color: var(--text-tertiary);
    font-style: italic;
    text-align: center;
    padding: 2rem 1rem;
    margin: 0;
}

.hub-start-lockin-card {
    text-align: center;
    padding: var(--space-xl);
}

.btn-start-lockin {
    display: block;
    width: 100%;
    padding: 1rem 1.5rem;
    font-size: 1.1rem;
    font-weight: 700;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: background 0.2s, transform 0.05s;
}

.btn-start-lockin:hover {
    background: var(--accent-secondary);
}

.hub-start-lockin-hint {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin: 0.5rem 0 0;
}

/* Button Styles */
.btn {
    padding: 0.75rem 1.25rem;
    border: none;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--accent-primary);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-secondary);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px var(--shadow);
}

.btn-secondary {
    background: transparent;
    color: var(--accent-primary);
    border: 2px solid var(--accent-primary);
}

.btn-secondary:hover {
    background: var(--accent-primary);
    color: white;
}

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-success:hover {
    background: var(--accent-secondary);
    transform: translateY(-1px);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hub-editor-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .hub-editor-left,
    .hub-editor-right {
        width: 100%;
    }
}

/* Practice Test Builder - Step-Based UI */
.test-builder-header {
    margin-bottom: 2rem;
}

.test-basic-info {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.test-title-input {
    flex: 1;
    min-width: 200px;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    background: var(--bg-card);
    color: var(--text-primary);
}

.test-builder-container {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 2px 8px var(--shadow-soft);
    border: 1px solid var(--border-color);
}

/* Step Progress Indicator */
.step-progress {
    display: flex;
    justify-content: space-between;
    margin-bottom: 3rem;
    position: relative;
}

.step-progress::before {
    content: '';
    position: absolute;
    top: 24px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--border-color);
    z-index: 0;
}

.step-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    z-index: 1;
    flex: 1;
}

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.3s;
}

.step-indicator.active .step-number {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
    transform: scale(1.1);
}

.step-indicator.completed .step-number {
    background: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

.step-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    text-align: center;
}

.step-indicator.active .step-label {
    color: var(--accent-primary);
    font-weight: 600;
}

/* Step Content */
.step-content {
    min-height: 400px;
    margin-bottom: 2rem;
}

.step-panel {
    padding: 1rem 0;
}

.step-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
}

.step-description {
    color: var(--text-secondary);
    margin: 0 0 2rem 0;
    line-height: 1.6;
}

/* Step 1: Structure */
.sections-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.section-editor-card {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.section-name-input {
    flex: 1;
    padding: 0.5rem 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    background: var(--bg-card);
    color: var(--text-primary);
}

.btn-icon {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    transition: all 0.2s;
}

.btn-icon:hover {
    background: var(--error-color);
    color: white;
}

.section-body {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-row label {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.form-row input,
.form-row select {
    padding: 0.625rem 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.95rem;
    background: var(--bg-card);
    color: var(--text-primary);
}

.question-types-select {
    min-height: 100px;
}

/* Step 2: Content */
.content-source-selection {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.source-option {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.source-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    cursor: pointer;
}

.source-checkbox input[type="checkbox"] {
    margin-top: 0.25rem;
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.source-label {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.source-label strong {
    font-size: 1.1rem;
    color: var(--text-primary);
}

.source-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.deck-select-multi {
    width: 100%;
    min-height: 120px;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-primary);
}

/* Step 3: Difficulty */
.difficulty-section,
.cognitive-skills-section {
    margin-bottom: 2.5rem;
}

.difficulty-section h4,
.cognitive-skills-section h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
}

.difficulty-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
}

.difficulty-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border-radius: 10px;
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: all 0.2s;
}

.difficulty-option:hover {
    border-color: var(--accent-primary);
}

.difficulty-option input[type="radio"]:checked + span {
    font-weight: 600;
    color: var(--accent-primary);
}

.difficulty-option input[type="radio"]:checked ~ .difficulty-option {
    border-color: var(--accent-primary);
    background: rgba(127, 168, 154, 0.1);
}

.section-hint {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0 0 1.5rem 0;
}

.skill-presets {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.preset-option {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 10px;
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: all 0.2s;
}

.preset-option:hover {
    border-color: var(--accent-primary);
}

.preset-option input[type="radio"]:checked ~ span {
    color: var(--accent-primary);
}

.preset-option input[type="radio"]:checked {
    accent-color: var(--accent-primary);
}

.skill-sliders {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.skill-slider-row {
    margin-bottom: 1.5rem;
}

.skill-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.skill-name {
    font-weight: 500;
    color: var(--text-primary);
    text-transform: capitalize;
}

.skill-percentage {
    font-weight: 600;
    color: var(--accent-primary);
}

.skill-slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
    -webkit-appearance: none;
}

.skill-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
}

.skill-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
    border: none;
}

.skill-total {
    text-align: center;
    font-weight: 600;
    color: var(--text-primary);
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

/* Step 4: Conditions */
.mode-selection {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.mode-option {
    cursor: pointer;
}

.mode-option input[type="radio"] {
    display: none;
}

.mode-card {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 2rem;
    border: 2px solid var(--border-color);
    transition: all 0.2s;
    text-align: center;
}

.mode-option input[type="radio"]:checked + .mode-card {
    border-color: var(--accent-primary);
    background: rgba(127, 168, 154, 0.1);
}

.mode-card h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
}

.mode-card p {
    color: var(--text-secondary);
    margin: 0;
}

.test-mode-options,
.practice-mode-options {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.test-mode-options h4,
.practice-mode-options h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
}

.option-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem 0;
    cursor: pointer;
}

.option-checkbox input[type="checkbox"] {
    margin-top: 0.25rem;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* Step 5: Review */
.review-summary {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.summary-card {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.summary-card h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.summary-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.summary-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.summary-value {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.sections-review {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.section-review-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem;
    background: var(--bg-card);
    border-radius: 8px;
    font-size: 0.9rem;
}

.section-review-item strong {
    color: var(--text-primary);
}

.time-badge {
    margin-left: auto;
    padding: 0.25rem 0.75rem;
    background: var(--accent-primary);
    color: white;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
}

.settings-review {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.setting-item:last-child {
    border-bottom: none;
}

.setting-label {
    color: var(--text-secondary);
}

.setting-value {
    font-weight: 600;
    color: var(--text-primary);
    text-transform: capitalize;
}

/* Step Navigation */
.step-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.step-actions {
    display: flex;
    gap: 1rem;
}

/* Advanced Toggle */
.advanced-toggle {
    margin-top: 1.5rem;
}

.btn-link {
    background: none;
    border: none;
    color: var(--accent-primary);
    font-size: 0.9rem;
    cursor: pointer;
    text-decoration: underline;
    padding: 0;
}

.btn-link:hover {
    color: var(--accent-secondary);
}

/* Test Ready View */
.test-header-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.test-header-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.test-ready-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 1.5rem;
    border: 2px solid var(--success-color);
    margin-bottom: 2rem;
}

.test-ready-message {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin: 0;
    font-weight: 500;
}

.test-builder-empty-state {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    border: 1px solid var(--border-color);
}

.test-builder-empty-state p {
    color: var(--text-secondary);
    font-size: 1rem;
}

@media (max-width: 768px) {
    .translation-view-container.side-by-side {
        flex-direction: column;
    }
    
    .matching-container {
        grid-template-columns: 1fr;
    }
    
    .hub-settings-actions {
        flex-direction: column;
    }
    
    .hub-settings-actions .btn {
        width: 100%;
    }
    
    .content-item {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .btn-open {
        width: 100%;
    }
    
    .step-progress {
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .step-progress::before {
        display: none;
    }
    
    .mode-selection {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .difficulty-options {
        grid-template-columns: 1fr 1fr;
    }
    
    .test-basic-info {
        flex-direction: column;
    }
    
    .test-title-input {
        width: 100%;
    }
}

/* Test Results & Analytics */
.test-results-modal .modal-content {
    max-width: 900px;
    max-height: 90vh;
    overflow-y: auto;
}

.results-summary-card {
    background: var(--accent-gradient);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    text-align: center;
    color: white;
}

.score-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.score-main {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    font-size: 3rem;
    font-weight: 700;
}

.score-value {
    font-size: 3.5rem;
}

.score-separator {
    font-size: 2rem;
    opacity: 0.7;
}

.score-total {
    font-size: 2.5rem;
    opacity: 0.8;
}

.score-percentage {
    font-size: 1.5rem;
    opacity: 0.9;
}

/* Analytics Tabs */
.analytics-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-color);
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: -2px;
}

.tab-btn:hover {
    color: var(--accent-primary);
}

.tab-btn.active {
    color: var(--accent-primary);
    border-bottom-color: var(--accent-primary);
}

/* Analytics Content */
.analytics-content {
    margin-bottom: 2rem;
}

.analytics-overview {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.analytics-card {
    background: var(--bg-secondary);
    border-radius: 10px;
    padding: 1.5rem;
    text-align: center;
    border: 1px solid var(--border-color);
}

.analytics-card h5 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0 0 0.75rem 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.analytics-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: 0.25rem;
}

.analytics-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.weak-areas-preview {
    background: var(--bg-secondary);
    border-radius: 10px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.weak-areas-preview h5 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
}

.weak-areas-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.weak-area-tag {
    padding: 0.5rem 1rem;
    background: var(--warning-color);
    color: var(--text-primary);
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* Analytics by Topic/Type/Difficulty */
.analytics-by-topic,
.analytics-by-type,
.analytics-by-difficulty {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.topic-performance,
.type-performance,
.difficulty-performance {
    background: var(--bg-secondary);
    border-radius: 10px;
    padding: 1rem;
    border: 1px solid var(--border-color);
}

.topic-header,
.type-header,
.difficulty-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.topic-name,
.type-name,
.difficulty-name {
    font-weight: 600;
    color: var(--text-primary);
}

.topic-percentage,
.type-percentage,
.difficulty-percentage {
    font-weight: 600;
    color: var(--accent-primary);
}

.topic-bar,
.type-bar,
.difficulty-bar {
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.topic-bar-fill,
.type-bar-fill,
.difficulty-bar-fill {
    height: 100%;
    background: var(--accent-primary);
    transition: width 0.3s;
}

.topic-stats,
.type-stats,
.difficulty-stats {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Detailed Results */
.detailed-results-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
}

.detailed-results-section h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
}

.detailed-results-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.result-item {
    background: var(--bg-secondary);
    border-radius: 10px;
    padding: 1.25rem;
    border: 2px solid var(--border-color);
    transition: all 0.2s;
}

.result-item.correct {
    border-color: var(--success-color);
    background: rgba(143, 191, 176, 0.1);
}

.result-item.incorrect {
    border-color: var(--error-color);
    background: rgba(216, 154, 154, 0.1);
}

.result-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.result-icon {
    font-size: 1.5rem;
    font-weight: 700;
}

.result-item.correct .result-icon {
    color: var(--success-color);
}

.result-item.incorrect .result-icon {
    color: var(--error-color);
}

.result-question-num {
    font-weight: 600;
    color: var(--text-primary);
}

.result-type-badge {
    margin-left: auto;
    padding: 0.25rem 0.75rem;
    background: var(--bg-card);
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: capitalize;
}

.result-body {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.result-answer,
.result-correct,
.result-explanation {
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.6;
}

.result-answer strong,
.result-correct strong {
    color: var(--text-primary);
}

.result-correct {
    color: var(--success-color);
}

.result-explanation {
    color: var(--text-secondary);
    font-style: italic;
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border-color);
}

/* Weak Areas CTA */
.weak-areas-cta {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    border: 2px solid var(--accent-primary);
    margin-top: 2rem;
    text-align: center;
}

.weak-areas-cta h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
}

.weak-areas-cta p {
    color: var(--text-secondary);
    margin: 0 0 1rem 0;
}

/* ========== Lock-In Focus Workspace ========== */
.focus-workspace.hidden,
.session-start-modal.hidden,
.session-countdown.hidden,
.lockin-loading-modal.hidden {
    display: none !important;
}

.lockin-loading-modal {
    position: fixed;
    inset: 0;
    z-index: 1500;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl, 1rem);
}

.lockin-loading-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.4);
}

.lockin-loading-dialog {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    background: var(--bg-card, #fff);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}

.lockin-loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-subtle, #e0e0e0);
    border-top-color: var(--accent-primary, #2563eb);
    border-radius: 50%;
    animation: lockin-loading-spin 0.8s linear infinite;
}

@keyframes lockin-loading-spin {
    to { transform: rotate(360deg); }
}

.lockin-loading-text {
    margin: 0;
    font-size: 1rem;
    color: var(--text-secondary, #666);
}

body.focus-mode:not(.home-mode) .header-actions .lockin-xp-display,
body.focus-mode:not(.home-mode) .header-actions .btn-home,
body.focus-mode:not(.home-mode) .header-actions .dark-mode-toggle {
    opacity: 0.4;
    pointer-events: none;
}
/* + New stays clickable in all focus modes */

body.focus-mode .page-title {
    font-size: var(--text-lg);
}

body.focus-mode header {
    padding: var(--space-md) var(--space-xl);
}

.focus-workspace {
    flex: 1;
    min-height: 0;
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr) 260px;
    grid-template-rows: 1fr;
    gap: 0;
    width: 100%;
    background: var(--bg-primary);
    overflow: hidden;
}

.focus-sidebar-left,
.focus-sidebar-right {
    background: var(--bg-card);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
    transition: width 0.2s ease, min-width 0.2s ease;
}

.focus-sidebar-right {
    border-right: none;
    border-left: 1px solid var(--border-color);
}

.focus-sidebar-left.collapsed {
    width: 52px !important;
    min-width: 52px;
}

.focus-sidebar-left.collapsed .focus-hub-title,
.focus-sidebar-left.collapsed .focus-outline-label,
.focus-sidebar-left.collapsed .focus-outline-items {
    display: none;
}

.focus-sidebar-right.collapsed {
    width: 52px !important;
    min-width: 52px;
    justify-self: end;
}

.focus-sidebar-right.collapsed .focus-session-label,
.focus-sidebar-right.collapsed .focus-session-panel {
    display: none;
}

.focus-sidebar-left {
    min-width: 200px;
}

.focus-sidebar-right {
    min-width: 220px;
}

.focus-sidebar-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: var(--space-md) var(--space-md);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.focus-sidebar-toggle {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-tertiary);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.75rem;
    color: var(--text-secondary);
    transition: background 0.2s, color 0.2s;
}

.focus-sidebar-toggle:hover {
    background: var(--accent-primary);
    color: white;
}

.focus-hub-title,
.focus-session-label {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.focus-outline {
    padding: var(--space-md);
    flex: 1;
    overflow-y: auto;
    min-height: 0;
}

.focus-outline-section {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    font-size: var(--text-sm);
    color: var(--text-secondary);
    cursor: default;
}

.focus-outline-section.active {
    background: rgba(127, 168, 154, 0.15);
    color: var(--accent-primary);
    font-weight: 600;
}

.focus-outline-icon {
    font-size: 1rem;
    flex-shrink: 0;
}

.focus-outline-items {
    margin-top: 0.5rem;
    padding-left: 0.25rem;
}

.focus-outline-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.6rem;
    border-radius: 6px;
    font-size: var(--text-xs);
    color: var(--text-secondary);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.focus-outline-item:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.focus-outline-item.active {
    background: var(--accent-primary);
    color: white;
}

/* Home mode: hide hub outline sections, show only My hubs list */
.focus-workspace.home-mode .focus-outline-section {
    display: none;
}

.focus-workspace.home-mode .focus-outline-items {
    margin-top: 0;
}

.focus-canvas {
    min-width: 0;
    min-height: 0;
    overflow: auto;
    background: var(--bg-primary);
    padding: var(--space-2xl) var(--space-xl);
    display: flex;
    flex-direction: column;
    align-items: stretch;
}

.focus-canvas #main-content {
    padding: var(--space-xl) 0;
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
    flex: 1;
    min-height: 0;
}

.focus-session-panel {
    padding: var(--space-md) var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    flex: 1;
    min-height: 0;
    overflow-y: auto;
}

.focus-session-timer {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent-primary);
    text-align: center;
    letter-spacing: 0.02em;
}

.focus-session-progress-wrap {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 999px;
    overflow: hidden;
}

.focus-session-progress-fill {
    height: 100%;
    width: 0%;
    background: var(--accent-primary);
    border-radius: 999px;
    transition: width 0.4s ease;
}

.focus-session-to-next {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

.focus-ai-feedback {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.5;
    padding: 0.5rem 0;
    border-top: 1px solid var(--border-color);
}

.btn-end-session {
    margin-top: auto;
    padding: 0.65rem 1rem;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--error-color);
    background: transparent;
    border: 2px solid var(--error-color);
    border-radius: 10px;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}

.btn-end-session:hover {
    background: var(--error-color);
    color: white;
}

.btn-start-session-panel {
    margin-top: 0.5rem;
    padding: 0.65rem 1rem;
    font-size: var(--text-sm);
    font-weight: 600;
    color: white;
    background: var(--primary-color, #4f46e5);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: opacity 0.2s;
}
.btn-start-session-panel:hover {
    opacity: 0.9;
}
.btn-start-session-panel.hidden {
    display: none;
}

@media (max-width: 900px) {
    .focus-workspace {
        grid-template-columns: 1fr;
    }
    .focus-sidebar-right {
        position: fixed;
        right: 0;
        top: 72px;
        bottom: 0;
        z-index: 100;
        max-width: 260px;
        box-shadow: -4px 0 20px var(--shadow);
    }
    .focus-sidebar-left.collapsed {
        position: fixed;
        left: 0;
        top: 72px;
        bottom: 0;
        z-index: 100;
    }
}

/* Session start modal */
.session-start-modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
}

.session-start-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.4);
}

.session-start-dialog {
    position: relative;
    background: var(--bg-card);
    border-radius: 16px;
    padding: var(--space-2xl);
    max-width: 420px;
    width: 100%;
    box-shadow: 0 20px 60px var(--shadow);
    border: 1px solid var(--border-color);
}

.session-start-title {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 var(--space-xl);
    text-align: center;
}

.session-start-duration label,
.session-start-tasks label,
.session-start-goal label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.session-duration-options {
    display: flex;
    gap: 0.5rem;
    margin-bottom: var(--space-lg);
}

.session-duration-btn {
    flex: 1;
    padding: 0.65rem 1rem;
    font-size: var(--text-sm);
    font-weight: 500;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}

.session-duration-btn:hover,
.session-duration-btn.selected {
    border-color: var(--accent-primary);
    background: rgba(127, 168, 154, 0.12);
    color: var(--accent-primary);
}

.session-task-options {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: var(--space-lg);
}

.session-task-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--text-sm);
    color: var(--text-primary);
    cursor: pointer;
}

.session-goal-input {
    width: 100%;
    padding: 0.65rem 1rem;
    font-size: var(--text-base);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    margin-bottom: var(--space-xl);
    background: var(--bg-primary);
    color: var(--text-primary);
}

.btn-start-session {
    display: block;
    width: 100%;
    padding: 0.9rem 1.5rem;
    font-size: 1rem;
    font-weight: 700;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    margin-bottom: 0.5rem;
    transition: background 0.2s, transform 0.05s;
}

.btn-start-session:hover {
    background: var(--accent-secondary);
}

.session-start-cancel {
    display: block;
    width: 100%;
    padding: 0.5rem;
    font-size: var(--text-sm);
    color: var(--text-secondary);
    background: none;
    border: none;
    cursor: pointer;
}

.session-countdown {
    position: fixed;
    inset: 0;
    z-index: 2100;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.5);
}

.session-countdown-number {
    font-size: 8rem;
    font-weight: 800;
    color: white;
    text-shadow: 0 0 40px var(--accent-primary);
    animation: sessionCountdownPop 0.8s ease-out;
}

@keyframes sessionCountdownPop {
    0% { transform: scale(0.5); opacity: 0; }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); opacity: 1; }
}

/* Content cards: focus workspace style */
.focus-mode .content-item,
.hub-editor-container .content-item {
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.focus-mode .content-item:hover,
.hub-editor-container .content-item:hover {
    box-shadow: 0 6px 20px var(--shadow);
    transform: translateY(-2px);
}

.content-item-focus-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0.35rem;
    font-size: var(--text-xs);
    color: var(--text-secondary);
}

.content-item-progress-ring {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: conic-gradient(var(--accent-primary) var(--progress-pct, 0%), var(--bg-tertiary) 0);
}

.content-item-progress-ring::before {
    content: '';
    display: block;
    width: 24px;
    height: 24px;
    margin: 4px;
    background: var(--bg-card);
    border-radius: 50%;
}

.content-item.card-type-deck { border-left: 4px solid var(--accent-primary); }
.content-item.card-type-test { border-left: 4px solid #5E8578; }
.content-item.card-type-study-guide { border-left: 4px solid #8B7355; }
.content-item.card-type-translation { border-left: 4px solid #8F8FBF; }