/* === MAIN.CSS ===
   assets/css/main.css
   НАЗНАЧЕНИЕ: CSS переменные (OKLCH), dark/light тема, базовый layout, типографика
   ОБНОВЛЕНО: 2026-03-24 - OKLCH цвета, CSS nesting, container queries, :has(), <dialog>
   РАЗМЕР: ~250 строк */

/* -- CSS Variables: Cosmic Dark (дефолт, OKLCH) -- */
:root {
    /* Фоны (tinted neutrals - hue 250 синий тинт) */
    --bg-primary: oklch(8% 0.02 250);
    --bg-secondary: oklch(12% 0.02 250);
    --bg-tertiary: oklch(18% 0.03 250);
    /* Текст */
    --text-primary: oklch(92% 0.01 250);
    --text-secondary: oklch(70% 0.01 250);
    --text-muted: oklch(50% 0.01 250);
    /* Акценты */
    --color-primary: oklch(60% 0.22 15);
    --color-secondary: oklch(62% 0.20 25);
    --color-success: oklch(72% 0.19 155);
    --color-warning: oklch(80% 0.16 85);
    --color-danger: oklch(60% 0.22 28);
    --color-info: oklch(68% 0.15 250);
    /* Производные через color-mix (без ручного подбора) */
    --color-primary-hover: color-mix(in oklch, var(--color-primary), black 20%);
    --color-primary-bg: color-mix(in oklch, var(--color-primary), transparent 85%);
    --color-danger-light: color-mix(in oklch, var(--color-danger), transparent 80%);
    /* Поверхности */
    --card-bg: oklch(13% 0.02 250);
    --border-color: oklch(22% 0.01 250);
    --border-color-light: oklch(18% 0.01 250);
    --hover-bg: oklch(18% 0.03 250);
    --bg-input: oklch(10% 0.02 250);
    /* Градиенты и тени */
    --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    --shadow-sm: 0 1px 2px oklch(0% 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px oklch(0% 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px oklch(0% 0 0 / 0.4);
    /* Радиусы */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    /* Шрифты */
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --font-sans: 'Exo 2', 'Space Grotesk', system-ui, sans-serif;
    /* Анимации */
    --transition: 0.2s ease;
    --transition-slow: 0.3s ease;
    /* Easing curves (профессиональные, НЕ ease) */
    --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-quart: cubic-bezier(0.5, 0, 0.75, 0);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
}

/* -- Light Theme (переопределяет OKLCH переменные) -- */
html.light-theme {
    --bg-primary: oklch(98% 0.005 250);
    --bg-secondary: oklch(96% 0.005 250);
    --bg-tertiary: oklch(93% 0.01 250);
    --text-primary: oklch(15% 0.02 250);
    --text-secondary: oklch(40% 0.01 250);
    --text-muted: oklch(55% 0.01 250);
    --color-primary: oklch(50% 0.22 15);
    --color-secondary: oklch(52% 0.20 25);
    --card-bg: oklch(100% 0 0);
    --border-color: oklch(85% 0.01 250);
    --border-color-light: oklch(90% 0.005 250);
    --hover-bg: oklch(94% 0.01 250);
    --bg-input: oklch(97% 0.005 250);
    --shadow-sm: 0 1px 2px oklch(0% 0 0 / 0.08);
    --shadow-md: 0 4px 6px -1px oklch(0% 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px oklch(0% 0 0 / 0.12);
}

/* -- Reset & Base -- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

/* -- Typography (CSS Nesting) -- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-primary);
    text-wrap: balance;
}

p { text-wrap: pretty; }

h1 { font-size: 1.5rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.1rem; }

a {
    color: var(--color-primary);
    text-decoration: none;
    &:hover { text-decoration: underline; }
}

code, pre {
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

/* -- Layout -- */
#app {
    display: flex;
    min-height: 100vh;
}

.zk-sidebar {
    width: 280px;
    flex-shrink: 0;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.zk-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.zk-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.zk-content {
    flex: 1;
    padding: 10px;
    overflow-y: auto;
}

/* -- Container Queries (виджеты реагируют на контейнер, не viewport) -- */
.zk-content { container-type: inline-size; }

@container (max-width: 600px) {
    .detail-grid { grid-template-columns: 1fr !important; }
    .stat-grid { grid-template-columns: repeat(2, 1fr) !important; }
}

/* -- :has() селектор (стилизация родителя по ребенку, без JS) -- */
.zk-form:has(input:invalid) .zk-submit-btn {
    opacity: 0.5;
    pointer-events: none;
}

tr:has(input:checked) {
    background: color-mix(in oklch, var(--color-primary), transparent 90%);
}

.zk-sidebar:has(.list-item.active) .list-empty-msg {
    display: none;
}

/* -- Native <dialog> стили + @starting-style entry animation -- */
dialog {
    background: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 10px;
    max-width: 500px;
    width: 90%;
    /* Entry/exit animation (Chrome 117+, Safari 17.5+, Firefox 129+) */
    opacity: 1;
    transform: scale(1) translateY(0);
    transition: opacity 0.25s var(--ease-out-quart),
                transform 0.25s var(--ease-out-quart),
                overlay 0.25s var(--ease-out-quart) allow-discrete,
                display 0.25s var(--ease-out-quart) allow-discrete;

    /* Starting state - dialog appears from slightly below + fade */
    @starting-style {
        opacity: 0;
        transform: scale(0.96) translateY(8px);
    }

    &::backdrop {
        background: oklch(0% 0 0 / 0.6);
        transition: background 0.25s var(--ease-out-quart),
                    overlay 0.25s allow-discrete,
                    display 0.25s allow-discrete;
        @starting-style {
            background: oklch(0% 0 0 / 0);
        }
    }
}

/* -- Utility -- */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-10 { gap: 10px; }
.gap-6 { gap: 6px; }
.w-full { width: 100%; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.85rem; }
.text-xs { font-size: 0.75rem; }
.font-mono { font-family: var(--font-mono); }
.nowrap { white-space: nowrap; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hidden { display: none !important; }

/* -- Scrollbar -- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
    &:hover { background: var(--text-muted); }
}

/* -- Theme Toggle Button (CSS Nesting) -- */
.zk-theme-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition);
    &:hover { background: var(--hover-bg); }
}

.zk-icon-sun  { display: none; }
.zk-icon-moon { display: inline; }
html.light-theme .zk-icon-sun  { display: inline; }
html.light-theme .zk-icon-moon { display: none; }

/* -- Tabs (CSS Nesting) -- */
.zk-tabs {
    display: flex;
    gap: 2px;
    border-bottom: 1px solid var(--border-color);
    padding: 0 10px;
}

.zk-tab {
    padding: 8px 14px;
    cursor: pointer;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    transition: color var(--transition), border-color var(--transition);
    font-size: 0.85rem;
    white-space: nowrap;
    &:hover { color: var(--text-primary); }
    &.active {
        color: var(--color-primary);
        border-bottom-color: var(--color-primary);
    }
}

/* -- View Transitions CSS (morph эффекты между вкладками) -- */
.zk-content { view-transition-name: main-content; }
.zk-sidebar { view-transition-name: sidebar; }

::view-transition-old(main-content) {
    animation: 200ms var(--ease-in-quart) both vt-fade-out;
}
::view-transition-new(main-content) {
    animation: 200ms var(--ease-out-quart) both vt-fade-in;
}

@keyframes vt-fade-out { to { opacity: 0; } }
@keyframes vt-fade-in { from { opacity: 0; } }

/* -- Skeleton Shimmer (загрузочные состояния, чистый CSS) -- */
.zk-skeleton {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    position: relative;
    overflow: hidden;

    &::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(
            90deg,
            transparent 0%,
            color-mix(in oklch, var(--text-primary), transparent 92%) 50%,
            transparent 100%
        );
        background-size: 200% 100%;
        animation: zk-shimmer 1.5s infinite;
        background-attachment: fixed;
    }
}

.zk-skeleton-text { height: 14px; margin-bottom: 8px; }
.zk-skeleton-text:last-child { width: 70%; }
.zk-skeleton-title { height: 20px; width: 60%; margin-bottom: 10px; }
.zk-skeleton-avatar { width: 32px; height: 32px; border-radius: 50%; flex-shrink: 0; }
.zk-skeleton-card { height: 120px; }
.zk-skeleton-stat { height: 48px; }

@keyframes zk-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* -- Popover API стили (Chrome 114+, Safari 17+, Firefox 125+) -- */
[popover] {
    background: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 10px;
    box-shadow: var(--shadow-lg);
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.2s var(--ease-out-quart),
                transform 0.2s var(--ease-out-quart),
                overlay 0.2s allow-discrete,
                display 0.2s allow-discrete;
    @starting-style {
        opacity: 0;
        transform: translateY(4px);
    }
    &::backdrop { background: transparent; }
}

/* -- Accessibility -- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    html { scroll-behavior: auto; }
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ===== CONTENT GENERATOR - Project Styles ===== */

/* -- Sidebar Navigation -- */
.zk-sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
}

.zk-logo {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

.zk-sidebar-nav {
    flex: 1;
    padding: 6px 0;
}

.zk-nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: background var(--transition), color var(--transition);
    font-size: 0.85rem;

    &:hover {
        background: var(--hover-bg);
        color: var(--text-primary);
        text-decoration: none;
    }
    &.active {
        background: var(--color-primary-bg);
        color: var(--color-primary);
        font-weight: 500;
    }
}

.zk-nav-icon {
    width: 20px;
    text-align: center;
    font-size: 1rem;
}

.zk-sidebar-footer {
    padding: 10px 14px;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

/* -- Status Badge -- */
.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    text-transform: uppercase;
    white-space: nowrap;
    background: color-mix(in oklch, var(--badge-color, var(--text-muted)), transparent 82%);
    color: var(--badge-color, var(--text-muted));
}

/* -- Buttons -- */
.zk-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-family: inherit;
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition);
    white-space: nowrap;

    &:hover { background: var(--hover-bg); }
    &:disabled { opacity: 0.5; pointer-events: none; }
}

.zk-btn-primary {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: oklch(98% 0 0);
    &:hover { background: var(--color-primary-hover); }
}

.zk-btn-success {
    background: var(--color-success);
    border-color: var(--color-success);
    color: oklch(10% 0 0);
    &:hover { background: color-mix(in oklch, var(--color-success), black 15%); }
}

.zk-btn-warning {
    background: var(--color-warning);
    border-color: var(--color-warning);
    color: oklch(10% 0 0);
    &:hover { background: color-mix(in oklch, var(--color-warning), black 15%); }
}

.zk-btn-danger {
    background: var(--color-danger);
    border-color: var(--color-danger);
    color: oklch(98% 0 0);
    &:hover { background: color-mix(in oklch, var(--color-danger), black 15%); }
}

.zk-btn-info {
    background: var(--color-info);
    border-color: var(--color-info);
    color: oklch(10% 0 0);
    &:hover { background: color-mix(in oklch, var(--color-info), black 15%); }
}

.zk-btn-sm {
    display: inline-flex;
    align-items: center;
    padding: 4px 8px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-family: inherit;
    cursor: pointer;
    transition: background var(--transition);
    white-space: nowrap;

    &:hover { background: var(--hover-bg); color: var(--text-primary); }
    &.zk-btn-danger { background: var(--color-danger-light); color: var(--color-danger); border-color: transparent; }
}

/* -- Forms -- */
.form-group {
    margin-bottom: 10px;
}

.form-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.form-input {
    width: 100%;
    padding: 8px 10px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-family: inherit;
    transition: border-color var(--transition);

    &:focus {
        outline: none;
        border-color: var(--color-primary);
    }
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.6;
}

select.form-input {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 30px;
}

/* -- Videos Layout (list + detail) -- */
.vid-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 0;
    height: calc(100vh - 20px);
}

.vid-list-panel {
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    overflow: hidden;
}

.vid-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
}

.vid-filter-chip {
    padding: 3px 8px;
    border-radius: 10px;
    font-size: 0.7rem;
    font-weight: 500;
    cursor: pointer;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    transition: background var(--transition), color var(--transition);

    &:hover { color: var(--text-primary); }
    &.active {
        background: var(--color-primary);
        color: oklch(98% 0 0);
    }
}

.vid-list-body {
    flex: 1;
    overflow-y: auto;
}

.vid-list-item {
    padding: 8px 10px;
    border-bottom: 1px solid var(--border-color-light);
    cursor: pointer;
    transition: background var(--transition);

    &:hover { background: var(--hover-bg); }
    &.active {
        background: var(--color-primary-bg);
        border-left: 3px solid var(--color-primary);
    }
}

.vid-list-item-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2px;
}

.vid-list-item-topic {
    font-size: 0.85rem;
    font-weight: 500;
}

.vid-list-item-meta {
    margin-top: 2px;
}

/* -- Video Detail -- */
.vid-detail-panel {
    overflow-y: auto;
    padding: 10px;
}

.vid-detail-inner {
    max-width: 700px;
}

.vid-player-wrap {
    margin-bottom: 10px;
    background: oklch(5% 0 0);
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 9 / 16;
    max-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.vid-player {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.vid-detail-info {
    margin-bottom: 10px;
}

.vid-detail-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 4px 0;
    font-size: 0.85rem;
    border-bottom: 1px solid var(--border-color-light);
}

.vid-label {
    width: 110px;
    flex-shrink: 0;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.vid-detail-section {
    margin-bottom: 10px;
}

.vid-section-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.vid-script {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.6;
    background: var(--bg-secondary);
    padding: 10px;
    border-radius: var(--radius-md);
    white-space: pre-wrap;
    max-height: 200px;
    overflow-y: auto;
}

.vid-error {
    background: var(--color-danger-light);
    padding: 10px;
    border-radius: var(--radius-md);
}

.vid-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
}

/* -- Generate Form -- */
.gen-wrap {
    display: flex;
    justify-content: center;
    padding: 10px;
}

.gen-form-card {
    width: 100%;
    max-width: 500px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 10px;
}

/* -- Niches -- */
.niche-wrap {
    padding: 10px;
    max-width: 800px;
}

.niche-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 10px;
}

.niche-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 10px;
}

.niche-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}

.niche-card-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.niche-card-actions {
    display: flex;
    gap: 4px;
}

.niche-card-desc {
    line-height: 1.4;
}

/* -- Music -- */
.music-wrap {
    padding: 10px;
    max-width: 700px;
}

.music-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 10px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 8px;

    &.music-item-active {
        border-color: var(--color-success);
    }
}

.music-item-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.music-item-name {
    font-weight: 500;
    font-size: 0.85rem;
}

.music-audio {
    width: 100%;
    height: 32px;
}

.music-item-actions {
    display: flex;
    gap: 6px;
}

/* -- Settings -- */
.settings-wrap {
    padding: 10px;
}

/* -- Container Query: Videos list+detail collapses on narrow -- */
@container (max-width: 700px) {
    .vid-layout {
        grid-template-columns: 1fr !important;
        grid-template-rows: 250px 1fr;
    }
    .vid-list-panel {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
}