/* ============================================
   CHINESE MASTER - Vocabulary Learner Styles
   (moved out of vocabulary-learner.js so the strict
    Content-Security-Policy can use style-src 'self')
   ============================================ */

/* Level Selector */
.level-selector {
    margin: 24px 0;
}

.level-selector h3 {
    margin-bottom: 16px;
    color: var(--text-primary, #f8fafc);
}

.level-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
}

.level-card {
    background: var(--bg-card, #1e293b);
    border: 2px solid var(--border-color, rgba(200, 184, 160, 0.08));
    border-radius: 12px;
    padding: 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.level-card:hover {
    background: var(--nav-link-hover, rgba(200, 184, 160, 0.05));
    border-color: var(--border-hover, rgba(200, 184, 160, 0.18));
    transform: translateY(-2px);
}

.level-card.selected {
    border-color: var(--color-primary, #ff6b6b);
    background: rgba(230, 57, 70, 0.1);
}

.level-number {
    font-size: 32px;
    font-weight: bold;
    color: var(--color-primary, #ff6b6b);
    margin-bottom: 8px;
}

.level-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary, #f8fafc);
    margin-bottom: 4px;
}

.level-desc {
    font-size: 12px;
    color: var(--text-secondary, #cbd5e1);
    margin-bottom: 8px;
}

.level-count {
    font-size: 14px;
    color: var(--text-primary, #f8fafc);
}

/* Vocab Actions */
.vocab-actions {
    display: flex;
    gap: 16px;
    margin-top: 24px;
}

/* Review Header */
.review-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.review-progress {
    font-size: 18px;
    color: var(--text-primary, #f8fafc);
}

.review-stats {
    display: flex;
    gap: 16px;
}

.stat-correct {
    color: var(--color-success, #10b981);
}

.stat-incorrect {
    color: var(--color-danger, #ff6b6b);
}

/* Flashcard */
.flashcard-container {
    display: flex;
    justify-content: center;
    margin: 32px 0;
    perspective: 1000px;
}

.flashcard {
    width: 320px;
    max-width: 100%;
    height: 400px;
    cursor: pointer;
    position: relative;
    transform-style: preserve-3d;
}

.flashcard-front,
.flashcard-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    transition: transform 0.6s;
    background: var(--bg-tertiary, #334155);
    border: 2px solid var(--nav-link-hover, rgba(200, 184, 160, 0.05));
}

.flashcard-back {
    transform: rotateY(180deg);
    background: var(--bg-tertiary, #334155);
}

.flashcard.flipped .flashcard-front {
    transform: rotateY(180deg);
}

.flashcard.flipped .flashcard-back {
    transform: rotateY(0);
}

.flashcard-character {
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 64px;
    color: white;
    margin-bottom: 16px;
}

.flashcard-pinyin {
    font-size: 20px;
    color: var(--text-secondary, #cbd5e1);
    margin-bottom: 16px;
}

.flashcard-hint {
    font-size: 14px;
    color: var(--text-secondary, #cbd5e1);
    position: absolute;
    bottom: 24px;
}

.flashcard-meaning {
    font-size: 24px;
    color: white;
    text-align: center;
    margin-bottom: 16px;
}

.flashcard-example {
    text-align: center;
    padding: 12px;
    background: var(--nav-link-hover, rgba(200, 184, 160, 0.05));
    border-radius: 8px;
}

.example-text {
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 16px;
    color: var(--text-primary, #f8fafc);
    line-height: 1.6;
}

/* Rating Buttons */
.rating-buttons {
    text-align: center;
    margin: 24px 0;
}

.rating-label {
    margin-bottom: 16px;
    color: var(--text-primary, #f8fafc);
}

.rating-grid {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.rating-btn {
    width: 80px;
    padding: 12px 8px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.rating-btn:hover {
    transform: translateY(-2px);
}

.rating-1 { background: var(--color-danger, #f43f5e); color: white; }
.rating-2 { background: var(--color-warning-dark, #b45309); color: white; }
.rating-3 { background: var(--color-secondary, #a78bfa); color: var(--bg-primary, #0f172a); }
.rating-4 { background: var(--color-success, #10b981); color: var(--bg-primary, #0f172a); }
.rating-5 { background: var(--color-success-dark, #047857); color: white; }

.rating-number {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 4px;
}

.rating-text {
    font-size: 13px;
    font-weight: 600;
}

/* Feedback Overlay */
.feedback-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: bold;
    border-radius: 16px;
    pointer-events: none;
    z-index: 10;
    transform: rotateY(180deg);
}

.feedback-overlay.correct {
    background: rgba(46, 204, 113, 0.9);
    color: white;
}

.feedback-overlay.incorrect {
    background: rgba(231, 76, 60, 0.9);
    color: white;
}

/* Session Complete */
.session-complete {
    text-align: center;
    padding: 40px 0;
}

.session-complete h2 {
    font-size: 32px;
    margin-bottom: 32px;
    color: white;
}

.session-results {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.result-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary, #ff6b6b) 0%, var(--color-primary-dark, #ef4444) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.result-number {
    font-size: 36px;
    font-weight: bold;
    color: white;
}

.result-details {
    text-align: left;
    color: var(--text-primary, #f8fafc);
}

.result-details p {
    margin-bottom: 8px;
}

.session-message {
    font-size: 20px;
    margin-bottom: 32px;
    color: var(--text-primary, #f8fafc);
}

.session-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Word Browser */
.browser-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.browser-header h2 {
    flex: 1;
    color: white;
    margin: 0;
}

.browser-header p {
    color: var(--text-secondary, #cbd5e1);
    width: 100%;
}

.browser-search {
    margin-bottom: 24px;
}

.browser-search input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-hover, rgba(200, 184, 160, 0.18));
    border-radius: 8px;
    background: var(--btn-secondary-bg, rgba(200, 184, 160, 0.08));
    color: white;
    font-size: 16px;
}

.browser-search input::placeholder {
    color: var(--text-muted, #6a6268);
}

.browser-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 16px;
}

.word-card {
    background: var(--btn-secondary-bg, rgba(200, 184, 160, 0.08));
    border: 1px solid var(--nav-link-hover, rgba(200, 184, 160, 0.05));
    border-radius: 8px;
    padding: 16px;
    text-align: center;
    transition: all 0.2s;
    cursor: pointer;
}

.word-card:hover {
    background: var(--nav-link-hover, rgba(200, 184, 160, 0.05));
    border-color: var(--border-hover, rgba(200, 184, 160, 0.18));
    transform: translateY(-2px);
}

.word-card-character {
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 32px;
    color: white;
    margin-bottom: 8px;
}

.word-card-pinyin {
    font-size: 14px;
    color: var(--text-secondary, #cbd5e1);
    margin-bottom: 8px;
}

.word-card-meaning {
    font-size: 14px;
    color: var(--text-primary, #f8fafc);
    margin-bottom: 4px;
}

.word-card-category {
    font-size: 11px;
    color: var(--text-secondary, #cbd5e1);
    text-transform: uppercase;
}

/* Back Button */
.back-btn {
    background: var(--nav-link-hover, rgba(200, 184, 160, 0.05));
    border: none;
    color: white;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s;
}

.back-btn:hover {
    background: var(--border-hover, rgba(200, 184, 160, 0.18));
}

.session-info {
    text-align: center;
    margin-top: 24px;
    color: var(--text-secondary, #cbd5e1);
    font-size: 14px;
}

.vocab-header {
    text-align: center;
    margin-bottom: 32px;
}

.vocab-header h2 {
    font-size: 28px;
    color: white;
    margin-bottom: 8px;
}

.vocab-header p {
    color: var(--text-secondary, #cbd5e1);
    font-size: 16px;
}

/* ============================================
   Session Manager (learner picker) styles
   ============================================ */

.session-modal {
    max-width: 520px;
    width: 100%;
}

.session-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 50vh;
    max-height: 50dvh;
    overflow-y: auto;
}

.session-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 14px;
    border-radius: 10px;
    background: var(--btn-secondary-bg, rgba(200, 184, 160, 0.06));
    border: 1px solid var(--border-color, rgba(200, 184, 160, 0.08));
    transition: background 0.15s;
}

.session-row:hover {
    background: var(--nav-link-hover, rgba(200, 184, 160, 0.05));
}

.session-row.active {
    border-color: rgba(167, 139, 250, 0.5);
    background: rgba(167, 139, 250, 0.08);
}

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

.session-name {
    color: white;
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 2px;
}

.session-meta {
    color: var(--text-muted, #6a6268);
    font-size: 11px;
}

.session-actions {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.btn-sm {
    padding: 6px 10px;
    font-size: 12px;
}

.badge-active {
    display: inline-block;
    margin-left: 6px;
    padding: 2px 8px;
    border-radius: 999px;
    background: rgba(167, 139, 250, 0.2);
    color: var(--color-secondary, #a78bfa);
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.profile-btn {
    margin-top: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 8px 12px;
    background: var(--btn-secondary-bg, rgba(200, 184, 160, 0.08));
    border: 1px solid var(--nav-link-hover, rgba(200, 184, 160, 0.05));
    border-radius: 8px;
    color: var(--text-primary, #f8fafc);
    cursor: pointer;
    transition: background 0.15s;
    font-size: 12px;
}

.profile-btn:hover {
    background: var(--nav-link-hover, rgba(200, 184, 160, 0.05));
}

.profile-icon {
    font-size: 14px;
}

.profile-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 140px;
}

/* Easy Mode Toggle */
.easy-mode-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    margin: 8px 0 16px;
    background: var(--bg-card, #1e293b);
    border: 2px solid var(--border-color, rgba(200, 184, 160, 0.08));
    border-radius: 12px;
    transition: border-color 0.2s;
}

.easy-mode-toggle:has(input:checked) {
    border-color: var(--color-accent, #06b6d4);
}

.easy-mode-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
    flex: 1;
}

.easy-mode-icon {
    font-size: 20px;
}

.easy-mode-text {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary, #f8fafc);
}

.easy-mode-desc {
    font-size: 12px;
    color: var(--text-secondary, #cbd5e1);
}

.toggle-switch {
    position: relative;
    width: 48px;
    height: 26px;
    flex-shrink: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--bg-hover, #334155);
    border-radius: 26px;
    transition: background 0.25s;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background: var(--text-primary, #f8fafc);
    border-radius: 50%;
    transition: transform 0.25s;
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--color-accent, #06b6d4);
}

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(22px);
}

.toggle-switch input:focus-visible + .toggle-slider {
    box-shadow: 0 0 0 2px var(--color-secondary, #a78bfa);
}

/* Easy badge in session info */
.easy-badge {
    display: inline-block;
    background: var(--color-accent, #06b6d4);
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 6px;
    margin-right: 8px;
    vertical-align: middle;
}

/* Make profile buttons keyboard accessible globally */
[role="button"]:focus-visible,
.profile-btn:focus-visible,
.btn:focus-visible {
    outline: 2px solid var(--color-secondary, #a78bfa);
    outline-offset: 2px;
}

/* Add :hover/cursor for clickable non-button cards that we set role=button on */
[role="button"] {
    cursor: pointer;
    user-select: none;
}