/* === TRANSCRIPTS.CSS ===
 * /assets/css/transcripts.css
 * НАЗНАЧЕНИЕ: Стили вкладки "Транскрипты" — парсер ru.acistudent.com
 * СВЯЗИ: assets/js/transcripts.js, index.php (#page-transcripts)
 * ЭСТЕТИКА: Dev Terminal — JetBrains Mono, OKLCH, плотный layout
 * РАЗМЕР: ~430 строк
 */

/* ============================================
 * 1. ПЕРЕМЕННЫЕ И БАЗА
 * ============================================ */

#page-transcripts {
    --tx-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;
    --tx-status-pending: oklch(60% 0.02 250);
    --tx-status-draft:   oklch(75% 0.15 75);
    --tx-status-fixed:   oklch(70% 0.18 145);
    --tx-status-published: oklch(65% 0.18 240);
    --tx-bg-soft: color-mix(in oklab, var(--bg-card), white 3%);
    --tx-border-soft: color-mix(in oklab, var(--border-color), transparent 40%);
}

#page-transcripts .container {
    max-width: 1400px;
    padding: 16px;
}

/* ============================================
 * 2. ЗАГОЛОВОК + ПРОГРЕСС
 * ============================================ */

.tx-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
    padding: 14px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
}

.tx-header__title {
    font-family: var(--tx-mono);
    font-size: 13px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.tx-header__progress {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 12px;
}

.tx-progress-bar {
    flex: 1;
    height: 6px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.tx-progress-bar__fill {
    height: 100%;
    background: linear-gradient(90deg, var(--tx-status-fixed), var(--tx-status-published));
    transition: width 0.5s var(--ease-out-expo, cubic-bezier(0.16, 1, 0.3, 1));
    border-radius: 4px;
}

.tx-progress-stats {
    font-family: var(--tx-mono);
    font-size: 13px;
    color: var(--text-primary);
    white-space: nowrap;
}

.tx-progress-stats strong {
    color: var(--tx-status-fixed);
    font-weight: 700;
}

.tx-header__actions {
    display: flex;
    gap: 8px;
}

.tx-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: var(--tx-mono);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.15s ease-out;
}

.tx-btn:hover {
    background: color-mix(in oklab, var(--bg-secondary), white 6%);
    border-color: var(--color-gold);
}

.tx-btn--primary {
    background: var(--color-gold);
    color: #000;
    border-color: var(--color-gold);
}

.tx-btn--primary:hover {
    background: var(--color-gold-dark);
    border-color: var(--color-gold-dark);
}

.tx-btn--success {
    background: var(--tx-status-fixed);
    color: #000;
    border-color: var(--tx-status-fixed);
}

.tx-btn--ghost {
    background: transparent;
}

.tx-btn[disabled] { opacity: 0.4; cursor: not-allowed; }

/* ============================================
 * 3. КАРТОЧКА КУРСА
 * ============================================ */

.tx-course {
    margin-bottom: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.tx-course__header {
    padding: 14px 18px;
    background: var(--tx-bg-soft);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

.tx-course__name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.tx-course__teachers {
    font-size: 12px;
    color: var(--text-muted);
    font-style: italic;
}

.tx-course__counter {
    margin-left: auto;
    font-family: var(--tx-mono);
    font-size: 12px;
    padding: 4px 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    color: var(--text-secondary);
}

.tx-course__counter strong {
    color: var(--tx-status-fixed);
}

/* ============================================
 * 4. УРОК — карточка
 * ============================================ */

.tx-lesson {
    padding: 14px 18px;
    border-top: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 16px;
    align-items: start;
    transition: background 0.2s ease-out;
}

.tx-lesson:first-child { border-top: none; }
.tx-lesson:hover { background: color-mix(in oklab, var(--bg-card), white 1.5%); }

.tx-lesson--has-transcript {
    background: color-mix(in oklab, var(--bg-card), oklch(60% 0.18 145) 4%);
}

.tx-lesson--published {
    background: color-mix(in oklab, var(--bg-card), oklch(60% 0.18 240) 6%);
}

/* Левая колонка: видео + аудио + материалы */
.tx-lesson__media {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.tx-video-frame {
    aspect-ratio: 16/9;
    width: 100%;
    background: #000;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.tx-video-frame iframe {
    width: 100%;
    height: 100%;
    border: 0;
}

.tx-video-empty {
    aspect-ratio: 16/9;
    background: var(--bg-secondary);
    border: 1px dashed var(--border-color);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--text-muted);
    font-family: var(--tx-mono);
    font-size: 11px;
    padding: 12px;
    text-align: center;
}

.tx-video-empty input {
    margin-top: 8px;
    padding: 6px 10px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: var(--tx-mono);
    font-size: 11px;
    color: var(--text-primary);
    width: 100%;
    max-width: 200px;
}

.tx-video-empty input:focus { outline: none; border-color: var(--color-gold); }

.tx-audio {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    background: var(--bg-secondary);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.tx-audio audio { flex: 1; min-width: 0; height: 32px; }

.tx-audio__label {
    font-family: var(--tx-mono);
    font-size: 11px;
    color: var(--text-muted);
}

.tx-materials {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.tx-material {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 11px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.12s ease-out;
}

.tx-material:hover {
    background: color-mix(in oklab, var(--bg-secondary), white 4%);
    border-color: var(--color-gold);
    color: var(--text-primary);
}

.tx-material__icon {
    width: 16px; height: 16px;
    flex-shrink: 0;
    color: var(--text-muted);
}

.tx-material__name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-family: var(--tx-mono);
}

.tx-material__size {
    color: var(--text-muted);
    font-family: var(--tx-mono);
    font-size: 10px;
}

/* Правая колонка: заголовок + textarea + actions */
.tx-lesson__main {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-width: 0;
}

.tx-lesson__title-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.tx-lesson__num {
    font-family: var(--tx-mono);
    font-size: 11px;
    color: var(--text-muted);
    background: var(--bg-secondary);
    padding: 3px 8px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    flex-shrink: 0;
}

.tx-lesson__title {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin: 0;
    flex: 1;
    line-height: 1.4;
}

.tx-status {
    flex-shrink: 0;
    width: 22px; height: 22px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 50%;
    font-size: 11px;
    font-weight: 700;
}

.tx-status--pending  { background: color-mix(in oklab, var(--tx-status-pending), transparent 80%); color: var(--tx-status-pending); border: 1px solid var(--tx-status-pending); }
.tx-status--draft    { background: color-mix(in oklab, var(--tx-status-draft), transparent 80%); color: var(--tx-status-draft); border: 1px solid var(--tx-status-draft); }
.tx-status--fixed    { background: color-mix(in oklab, var(--tx-status-fixed), transparent 75%); color: var(--tx-status-fixed); border: 1px solid var(--tx-status-fixed); }
.tx-status--published{ background: color-mix(in oklab, var(--tx-status-published), transparent 75%); color: var(--tx-status-published); border: 1px solid var(--tx-status-published); }

.tx-textarea {
    width: 100%;
    min-height: 220px;
    max-height: 600px;
    padding: 10px 12px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: var(--tx-mono);
    font-size: 12px;
    line-height: 1.6;
    resize: vertical;
    transition: border-color 0.15s ease-out;
}

.tx-textarea:focus {
    outline: none;
    border-color: var(--color-gold);
    background: color-mix(in oklab, var(--bg-secondary), white 1.5%);
}

.tx-textarea--has-content {
    background: color-mix(in oklab, var(--bg-secondary), oklch(60% 0.18 145) 3%);
}

.tx-actions {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

.tx-meta {
    margin-left: auto;
    font-family: var(--tx-mono);
    font-size: 11px;
    color: var(--text-muted);
}

.tx-meta__autosave {
    color: var(--tx-status-draft);
    animation: tx-pulse 1.5s ease-in-out infinite;
}

@keyframes tx-pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

/* ============================================
 * 5. ПУСТЫЕ СОСТОЯНИЯ И LOADER
 * ============================================ */

.tx-loading {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
    font-family: var(--tx-mono);
    font-size: 13px;
}

.tx-loading::before {
    content: '⌛';
    display: block;
    font-size: 32px;
    margin-bottom: 12px;
    animation: tx-spin 1.5s linear infinite;
}

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

.tx-empty {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
    font-family: var(--tx-mono);
    font-size: 12px;
    background: var(--bg-secondary);
    border-radius: 8px;
}

/* ============================================
 * 6. RESPONSIVE
 * ============================================ */

@media (max-width: 900px) {
    .tx-lesson {
        grid-template-columns: 1fr;
    }
    .tx-lesson__media {
        flex-direction: row;
        flex-wrap: wrap;
    }
    .tx-video-frame, .tx-video-empty { width: 100%; }
}

@media (max-width: 600px) {
    .tx-header { flex-direction: column; align-items: stretch; }
    .tx-header__progress { width: 100%; }
}