/* ── Reset & Design Tokens ──────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@300;400;500;600;700&display=swap');

:root {
    --bg-primary:    #0a0a0c;
    --bg-secondary:  #111116;
    --bg-card:       rgba(255, 255, 255, 0.03);
    --border-subtle: rgba(255, 255, 255, 0.06);
    --text-primary:  #f0f0f2;
    --text-secondary:#8a8a95;
    --text-muted:    #55555f;
    --accent:        #a78bfa;
    --accent-glow:   rgba(167, 139, 250, 0.25);
    --danger:        #f87171;
    --success:       #34d399;
    --radius-sm:     8px;
    --radius-md:     14px;
    --radius-lg:     20px;
    --font-body:     'Inter', system-ui, -apple-system, sans-serif;
    --font-display:  'Outfit', system-ui, sans-serif;
    --transition:    0.3s cubic-bezier(.4,0,.2,1);
}

/* ── Hidden elements by default ────────────────────────────── */
.sidebar__handle { display: none !important; }
.sidebar__close { display: none !important; }
.cursor-hint__text-mobile { display: none !important; }
.mobile-toolbar { display: none !important; }
.mobile-backdrop { display: none !important; }
.sidebar__content { display: contents; } /* transparent wrapper on desktop */

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

html, body {
    height: 100%;
    font-family: var(--font-body);
    background:  var(--bg-primary);
    color:       var(--text-primary);
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ── Layout ─────────────────────────────────────────────────────── */
.app {
    display: grid;
    grid-template-columns: 380px 1fr;
    height: 100vh;
}

/* ── Sidebar ────────────────────────────────────────────────────── */
.sidebar {
    position: relative;
    z-index: 10;
    display: flex;
    flex-direction: column;
    padding: 40px 32px 32px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-subtle);
    overflow-y: auto;
}

.sidebar__logo {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar__logo-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #6366f1);
    display: grid;
    place-items: center;
    font-size: 0.75rem;
    color: #fff;
    box-shadow: 0 0 20px var(--accent-glow);
}

.sidebar__subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    font-weight: 400;
    letter-spacing: 0.02em;
}

.sidebar__label {
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    margin-bottom: 16px;
}

/* ── Scene list ─────────────────────────────────────────────────── */
.scene-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
}

.scene-item {
    position: relative;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    cursor: pointer;
    user-select: none;
    transition: background var(--transition), box-shadow var(--transition);
    border: 1px solid transparent;
}

.scene-item:hover {
    background: var(--bg-card);
    border-color: var(--border-subtle);
}

.scene-item.active {
    background: rgba(167, 139, 250, 0.06);
    border-color: rgba(167, 139, 250, 0.15);
    box-shadow: 0 0 30px rgba(167, 139, 250, 0.08);
}

.scene-item.active .scene-item__indicator {
    background: var(--accent);
    box-shadow: 0 0 12px var(--accent-glow);
}

.scene-item__indicator {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--text-muted);
    flex-shrink: 0;
    transition: background var(--transition), box-shadow var(--transition);
}

.scene-item__thumb {
    width: 48px;
    height: 34px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    flex-shrink: 0;
    transition: transform var(--transition), box-shadow var(--transition);
    border: 1px solid var(--border-subtle);
}

.scene-item:hover .scene-item__thumb {
    transform: scale(1.05);
    box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}

.scene-item__info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
    min-width: 0;
}

.scene-item__title {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: -0.01em;
}

.scene-item__meta {
    font-size: 0.72rem;
    color: var(--text-muted);
    letter-spacing: 0.01em;
}

.scene-item__number {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--font-display);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    opacity: 0.5;
}

/* ── Viewport ───────────────────────────────────────────────────── */
.viewport {
    position: relative;
    overflow: hidden;
    background: #000;
}

.viewport__overlay {
    position: absolute;
    inset: 0;
    z-index: 5;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 48px;
    background: linear-gradient(
        0deg,
        rgba(0,0,0,0.55) 0%,
        rgba(0,0,0,0.0) 50%
    );
    opacity: 1;
    transition: opacity 0.4s ease;
}

.viewport__overlay.transitioning {
    opacity: 0;
}

.viewport__title {
    font-family: var(--font-display);
    font-size: 2.8rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: #fff;
    text-shadow: 0 2px 20px rgba(0,0,0,0.35);
    margin-bottom: 8px;
}

.viewport__desc {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
    max-width: 420px;
    line-height: 1.5;
}

/* ── Progress bar (top of viewport) ─────────────────────────────── */
.progress-bar {
    position: absolute;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), #6366f1);
    z-index: 20;
    width: 0%;
    transition: width 50ms linear;
    box-shadow: 0 0 12px var(--accent-glow);
    border-radius: 0 3px 3px 0;
}

/* ── Bottom info bar ────────────────────────────────────────────── */
.sidebar__footer {
    margin-top: auto;
    padding-top: 24px;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar__footer-text {
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

.sidebar__footer-badge {
    font-size: 0.62rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 100px;
    background: rgba(167, 139, 250, 0.1);
    color: var(--accent);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* ── Cursor hint ────────────────────────────────────────────────── */
.cursor-hint {
    position: absolute;
    top: 24px;
    right: 24px;
    z-index: 20;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 100px;
    background: rgba(0,0,0,0.45);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.08);
    font-size: 0.72rem;
    color: rgba(255,255,255,0.5);
    pointer-events: none;
    opacity: 1;
    transition: opacity 0.5s ease;
}

.cursor-hint.hidden {
    opacity: 0;
}

.cursor-hint__dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 0.4; transform: scale(0.8); }
    50%      { opacity: 1;   transform: scale(1.2); }
}

/* ── Counter badge ──────────────────────────────────────────────── */
.viewport__counter {
    position: absolute;
    top: 24px;
    left: 24px;
    z-index: 20;
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 600;
    color: rgba(255,255,255,0.4);
    letter-spacing: 0.05em;
}

.viewport__counter span {
    color: #fff;
    font-size: 1.3rem;
}

/* ── Settings Panel ─────────────────────────────────────────────── */
.settings-panel {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-subtle);
}

.settings-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    letter-spacing: 0.02em;
}

.settings-toggle:hover {
    background: rgba(255,255,255,0.05);
    border-color: rgba(255,255,255,0.1);
    color: var(--text-primary);
}

.settings-toggle__chevron {
    margin-left: auto;
    font-size: 0.9rem;
    transition: transform var(--transition);
}

.settings-panel.open .settings-toggle__chevron {
    transform: rotate(180deg);
}

.settings-panel.open .settings-toggle {
    border-color: rgba(167, 139, 250, 0.2);
    background: rgba(167, 139, 250, 0.04);
}

.settings-body {
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: max-height 0.35s cubic-bezier(.4,0,.2,1),
                opacity 0.25s ease,
                padding 0.3s ease;
    padding: 0 4px;
}

.settings-panel.open .settings-body {
    max-height: 300px;
    opacity: 1;
    padding: 16px 4px 4px;
}

.settings-group {
    margin-bottom: 16px;
}

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

.settings-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.settings-value {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--accent);
    font-size: 0.72rem;
    letter-spacing: 0;
    text-transform: none;
}

/* ── Range Slider ───────────────────────────────────────────────── */
.settings-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    border-radius: 100px;
    background: rgba(255,255,255,0.08);
    outline: none;
    margin-bottom: 12px;
    cursor: pointer;
}

.settings-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 0 10px var(--accent-glow), 0 2px 6px rgba(0,0,0,0.3);
    border: 2px solid var(--bg-secondary);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.settings-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: 0 0 16px var(--accent-glow), 0 2px 8px rgba(0,0,0,0.4);
}

.settings-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 0 10px var(--accent-glow);
    border: 2px solid var(--bg-secondary);
}

/* ── Speed Presets ──────────────────────────────────────────────── */
.speed-presets {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.speed-preset {
    flex: 1;
    min-width: 0;
    padding: 5px 4px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 0.6rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
    white-space: nowrap;
}

.speed-preset:hover {
    background: rgba(255,255,255,0.04);
    border-color: rgba(255,255,255,0.1);
    color: var(--text-secondary);
}

.speed-preset.active {
    background: rgba(167, 139, 250, 0.1);
    border-color: rgba(167, 139, 250, 0.25);
    color: var(--accent);
}

/* ── Select Dropdown ────────────────────────────────────────────── */
.settings-select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.78rem;
    cursor: pointer;
    outline: none;
    transition: border-color var(--transition);
    -webkit-appearance: none;
    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='%238a8a95' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
}

.settings-select:focus {
    border-color: rgba(167, 139, 250, 0.4);
}

.settings-select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 8px;
}

/* ── Scrollbar ──────────────────────────────────────────────────── */
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.08);
    border-radius: 100px;
}

/* ── Global hidden elements (mobile only) handled at top ───────── */

/* ── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 860px) {

    /* ── Layout: full viewport ────────────────── */
    .app {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr;
        position: relative;
    }

    /* ── Viewport: takes full screen ──────────── */
    .viewport {
        order: 1;
        grid-column: 1;
        grid-row: 1;
    }

    .viewport__overlay {
        padding: 20px 20px 90px;
    }

    .viewport__title {
        font-size: 1.8rem;
    }

    .viewport__desc {
        font-size: 0.8rem;
        max-width: 280px;
    }

    .viewport__counter {
        top: 16px;
        left: 16px;
        font-size: 0.72rem;
    }

    .viewport__counter span {
        font-size: 1.1rem;
    }

    /* ── Cursor hint: mobile text ─────────────── */
    .cursor-hint {
        top: 16px;
        right: 16px;
        padding: 6px 12px;
        font-size: 0.65rem;
    }

    .cursor-hint__text-desktop { display: none; }
    .cursor-hint__text-mobile  { display: inline; }

    /* ── Mobile toolbar (fixed bottom) ────────── */
    .mobile-toolbar {
        display: flex;
        position: absolute;
        bottom: 20px;
        left: 50%;
        transform: translateX(-50%) translateY(30px);
        z-index: 15;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 8px;
        background: rgba(0,0,0,0.5);
        backdrop-filter: blur(24px) saturate(180%);
        -webkit-backdrop-filter: blur(24px) saturate(180%);
        border: 1px solid rgba(255,255,255,0.12);
        border-radius: 100px;
        box-shadow: 0 10px 40px rgba(0,0,0,0.6);
        pointer-events: auto;
        width: auto;
        min-width: 250px;
        opacity: 0;
        animation: toolbar-entrance 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
        animation-delay: 0.5s;
    }

    @keyframes toolbar-entrance {
        to { transform: translateX(-50%) translateY(0); opacity: 1; }
    }

    .mobile-toolbar__btn {
        width: 44px;
        height: 44px;
        border-radius: 50%;
        border: 1px solid transparent;
        background: rgba(255,255,255,0.05);
        color: rgba(255,255,255,0.7);
        display: grid;
        place-items: center;
        cursor: pointer;
        transition: all var(--transition);
        pointer-events: auto;
    }

    .mobile-toolbar__btn:hover {
        background: rgba(255,255,255,0.1);
        color: #fff;
    }

    .mobile-toolbar__btn:active {
        transform: scale(0.92);
        background: rgba(255,255,255,0.1);
    }

    .mobile-toolbar__toggle {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 0 20px;
        height: 44px;
        border-radius: 100px;
        border: 1px solid rgba(167, 139, 250, 0.2);
        background: rgba(167, 139, 250, 0.1);
        color: #fff;
        font-family: var(--font-body);
        font-size: 0.75rem;
        font-weight: 600;
        cursor: pointer;
        transition: all var(--transition);
        pointer-events: auto;
    }

    .mobile-toolbar__toggle svg {
        color: var(--accent);
    }

    .mobile-toolbar__toggle:active {
        transform: scale(0.96);
        background: rgba(167, 139, 250, 0.15);
        border-color: rgba(167, 139, 250, 0.3);
    }

    /* ── Sidebar → bottom sheet overlay ───────── */
    .sidebar {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        z-index: 100;
        order: 2;
        max-height: 85vh;
        padding: 0 0 20px;
        border-right: none;
        border-top: 1px solid rgba(255,255,255,0.1);
        border-radius: 28px 28px 0 0;
        background: rgba(17, 17, 22, 0.9);
        backdrop-filter: blur(30px) saturate(180%);
        -webkit-backdrop-filter: blur(30px) saturate(180%);
        box-shadow: 0 -20px 60px rgba(0,0,0,0.8);
        transform: translateY(105%);
        transition: transform 0.5s cubic-bezier(.32,.72,.24,1.02);
        overflow: hidden; /* handle scrolling in a container instead */
        display: flex;
        flex-direction: column;
    }

    .sidebar.mobile-open {
        transform: translateY(0);
    }

    /* Container for internal scrolling on mobile */
    .sidebar__content {
        padding: 0 24px 24px;
        overflow-y: auto;
        flex: 1;
        -webkit-overflow-scrolling: touch;
    }

    /* drag handle */
    .sidebar__handle {
        width: 100%;
        height: 32px;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        cursor: grab;
    }

    .sidebar__handle::after {
        content: '';
        width: 40px;
        height: 5px;
        border-radius: 100px;
        background: rgba(255,255,255,0.25);
        box-shadow: 0 1px 2px rgba(0,0,0,0.2);
    }

    .sidebar__logo {
        font-size: 1.1rem;
        margin-bottom: 4px;
    }

    .sidebar__subtitle {
        display: block;
        font-size: 0.72rem;
        margin-bottom: 16px;
    }

    .sidebar__label {
        display: block;
        margin-bottom: 10px;
    }

    /* ── Scene list: vertical on mobile ──────── */
    .scene-list {
        flex-direction: column;
        gap: 4px;
        flex: none;
        overflow-x: visible;
        overflow-y: visible;
    }

    .scene-item {
        min-width: 0;
        padding: 10px 12px;
        gap: 10px;
    }

    .scene-item__thumb {
        width: 42px;
        height: 30px;
    }

    .scene-item__title {
        font-size: 0.82rem;
    }

    .scene-item__meta {
        font-size: 0.65rem;
    }

    .scene-item__number {
        font-size: 0.62rem;
        right: 12px;
    }

    /* ── Settings: always visible when panel open ── */
    .settings-panel {
        margin-top: 12px;
        padding-top: 12px;
    }

    .speed-presets {
        gap: 4px;
    }

    .speed-preset {
        padding: 7px 4px;
        font-size: 0.62rem;
    }

    .settings-select {
        padding: 12px 14px;
        font-size: 0.82rem;
    }

    /* ── Footer on mobile ────────────────────── */
    .sidebar__footer {
        display: flex;
        margin-top: 16px;
        padding-top: 12px;
    }

    /* ── Backdrop ─────────────────────────────── */
    .mobile-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        z-index: 90;
        background: rgba(0,0,0,0.5);
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.35s ease;
    }

    .mobile-backdrop.visible {
        opacity: 1;
        pointer-events: auto;
        visibility: visible;
    }

    /* Close button inside sidebar on mobile */
    .sidebar__close {
        position: absolute;
        top: 10px;
        right: 16px;
        width: 32px;
        height: 32px;
        border-radius: 50%;
        background: rgba(255,255,255,0.1);
        border: 1px solid rgba(255,255,255,0.05);
        color: #fff;
        display: grid;
        place-items: center;
        cursor: pointer;
        z-index: 10;
        transition: all var(--transition);
        padding: 0;
        outline: none;
    }

    .sidebar__close:active {
        transform: scale(0.9);
        background: rgba(255,255,255,0.15);
    }

    /* ── Progress bar adjustment ──────────────── */
    .progress-bar {
        height: 2px;
    }
}

/* ── Extra small screens (≤ 400px) ──────────────────────────────── */
@media (max-width: 400px) {
    .viewport__title {
        font-size: 1.5rem;
    }

    .viewport__desc {
        font-size: 0.72rem;
        max-width: 220px;
    }

    .viewport__overlay {
        padding: 16px 16px 80px;
    }

    .mobile-toolbar__toggle span {
        display: none;
    }

    .scene-item__indicator {
        display: none;
    }

    .sidebar {
        max-height: 80vh;
    }
}