/* ═══════════════════════════════════════════
       THEME
       ═══════════════════════════════════════════ */
    :root, [data-theme="dark"] {
        --crimson: #C51A4A;
        --crimson-light: #E8365F;
        --crimson-glow: rgba(197, 26, 74, 0.45);
        --crimson-dim: rgba(197, 26, 74, 0.12);
        --crimson-faint: rgba(197, 26, 74, 0.04);
        --bg: #06080F;
        --bg-gradient: radial-gradient(ellipse at top, #0E1221 0%, #06080F 60%);
        --bg-card: #0E1221;
        --bg-elevated: #141A2D;
        --bg-deep: #05070D;
        --bg-nav: rgba(6, 8, 15, 0.75);
        --text: #e2e8f0;
        --text-secondary: #94a3b8;
        --text-muted: #64748b;
        --text-faint: #475569;
        --border: rgba(255, 255, 255, 0.06);
        --border-hover: rgba(255, 255, 255, 0.14);
        --border-strong: rgba(255, 255, 255, 0.22);
        --waveform-bg: #090C16;
        --wave-base: #2a3549;
        --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
        --shadow-glow: 0 0 40px rgba(197, 26, 74, 0.22);
    }
    [data-theme="light"] {
        --crimson: #C51A4A;
        --crimson-light: #E8365F;
        --crimson-glow: rgba(197, 26, 74, 0.18);
        --crimson-dim: rgba(197, 26, 74, 0.08);
        --crimson-faint: rgba(197, 26, 74, 0.03);
        --bg: #F5F3F0;
        --bg-gradient: radial-gradient(ellipse at top, #FFFFFF 0%, #F5F3F0 60%);
        --bg-card: #FFFFFF;
        --bg-elevated: #FAF9F7;
        --bg-deep: #ECE9E3;
        --bg-nav: rgba(245, 243, 240, 0.85);
        --text: #1a1a2e;
        --text-secondary: #4a4a5a;
        --text-muted: #7a7a8a;
        --text-faint: #a0a0b0;
        --border: rgba(0, 0, 0, 0.08);
        --border-hover: rgba(0, 0, 0, 0.18);
        --border-strong: rgba(0, 0, 0, 0.28);
        --waveform-bg: #ede9e3;
        --wave-base: #b0a898;
        --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.08);
        --shadow-glow: 0 0 40px rgba(197, 26, 74, 0.15);
    }

    /* ═══════════════════════════════════════════
       RESET & BASE
       ═══════════════════════════════════════════ */
    * { margin: 0; padding: 0; box-sizing: border-box; }
    *:focus-visible { outline: 2px solid var(--crimson); outline-offset: 2px; border-radius: 4px; }
    html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
    body {
        font-family: 'DM Sans', sans-serif;
        background: var(--bg);
        background-image: var(--bg-gradient);
        color: var(--text);
        min-height: 100vh;
        overflow-x: hidden;
    }
    h1, h2, h3, h4 { font-family: 'Syne', sans-serif; letter-spacing: -0.02em; }
    button { font-family: inherit; }

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

    /* ═══════════════════════════════════════════
       NAV
       ═══════════════════════════════════════════ */
    nav {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 14px 24px;
        background: var(--bg-nav);
        backdrop-filter: blur(24px) saturate(180%);
        -webkit-backdrop-filter: blur(24px) saturate(180%);
        border-bottom: 1px solid var(--border);
        position: sticky;
        top: 0;
        z-index: 100;
    }
    .nav-brand {
        display: flex;
        align-items: center;
        gap: 10px;
        text-decoration: none;
        color: var(--text);
        transition: opacity 0.2s;
    }
    .nav-brand:hover { opacity: 0.85; }
    .nav-dot {
        width: 28px; height: 28px;
        background: var(--crimson);
        border-radius: 50%;
        box-shadow: 0 0 18px var(--crimson-glow), inset 0 0 0 3px var(--bg);
        position: relative;
        flex-shrink: 0;
    }
    .nav-dot::after {
        content: '';
        position: absolute;
        inset: 7px;
        background: #fff;
        border-radius: 50%;
    }
    .nav-title {
        font-family: 'Syne', sans-serif;
        font-weight: 700;
        font-size: 15px;
        letter-spacing: -0.3px;
    }
    .nav-title span { color: var(--crimson-light); }
    .nav-badge {
        font-size: 10px;
        font-weight: 700;
        padding: 2px 7px;
        border-radius: 20px;
        background: var(--crimson-dim);
        color: var(--crimson-light);
        letter-spacing: 0.5px;
        margin-left: 4px;
        border: 1px solid rgba(197, 26, 74, 0.3);
    }
    .nav-actions { display: flex; align-items: center; gap: 8px; }

    /* ═══════════════════════════════════════════
       BUTTONS
       ═══════════════════════════════════════════ */
    .btn {
        font-family: 'DM Sans', sans-serif;
        font-size: 13px;
        font-weight: 500;
        padding: 7px 14px;
        border-radius: 8px;
        border: 1px solid var(--border);
        background: var(--bg-card);
        color: var(--text-secondary);
        cursor: pointer;
        transition: all 0.18s cubic-bezier(0.2, 0, 0.2, 1);
        display: inline-flex;
        align-items: center;
        gap: 6px;
        user-select: none;
        white-space: nowrap;
    }
    .btn:hover { border-color: var(--border-hover); color: var(--text); transform: translateY(-1px); }
    .btn:active { transform: translateY(0); }
    .btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none !important; }
    .btn-crimson { background: var(--crimson); border-color: var(--crimson); color: #fff; }
    .btn-crimson:hover { background: var(--crimson-light); box-shadow: var(--shadow-glow); }
    .btn-ghost { background: transparent; border-color: transparent; }
    .btn-ghost:hover { background: var(--bg-card); border-color: var(--border); }
    .btn-sm { padding: 4px 9px; font-size: 12px; }
    .btn-icon {
        width: 30px; height: 30px;
        padding: 0;
        justify-content: center;
    }
    .btn-icon svg { width: 14px; height: 14px; }
    .btn-kbd {
        font-family: 'JetBrains Mono', monospace;
        font-size: 10px;
        background: rgba(255, 255, 255, 0.08);
        padding: 1px 5px;
        border-radius: 3px;
        margin-left: 4px;
        color: var(--text-faint);
    }
    [data-theme="light"] .btn-kbd { background: rgba(0, 0, 0, 0.06); }

    .theme-toggle {
        width: 30px; height: 30px;
        display: flex; align-items: center; justify-content: center;
        border-radius: 8px;
        border: 1px solid var(--border);
        background: transparent;
        color: var(--text-muted);
        cursor: pointer;
        transition: all 0.18s;
    }
    .theme-toggle:hover { border-color: var(--border-hover); color: var(--text); transform: rotate(15deg); }
    .theme-toggle svg { width: 14px; height: 14px; }

    /* ═══════════════════════════════════════════
       FADE TRANSITIONS BETWEEN SCREENS
       ═══════════════════════════════════════════ */
    .screen {
        animation: fadeIn 0.4s cubic-bezier(0.2, 0, 0.1, 1);
    }
    .screen.fade-out {
        animation: fadeOut 0.3s cubic-bezier(0.4, 0, 1, 1) forwards;
    }
    @keyframes fadeIn {
        from { opacity: 0; transform: translateY(6px); }
        to   { opacity: 1; transform: translateY(0); }
    }
    @keyframes fadeOut {
        from { opacity: 1; transform: translateY(0); }
        to   { opacity: 0; transform: translateY(-6px); }
    }

    /* ═══════════════════════════════════════════
       UPLOAD SCREEN
       ═══════════════════════════════════════════ */
    #uploadScreen {
        min-height: calc(100vh - 60px);
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 24px;
        position: relative;
    }
    /* Animated grid background */
    #uploadScreen::before {
        content: '';
        position: absolute; inset: 0;
        background-image:
            linear-gradient(var(--border) 1px, transparent 1px),
            linear-gradient(90deg, var(--border) 1px, transparent 1px);
        background-size: 48px 48px;
        mask-image: radial-gradient(ellipse at center, #000 10%, transparent 70%);
        -webkit-mask-image: radial-gradient(ellipse at center, #000 10%, transparent 70%);
        pointer-events: none;
    }
    .upload-card {
        max-width: 520px;
        width: 100%;
        position: relative;
        z-index: 1;
    }
    .upload-hero {
        text-align: center;
        margin-bottom: 32px;
    }
    .upload-hero .pill {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 4px 12px;
        border-radius: 20px;
        background: var(--crimson-dim);
        border: 1px solid rgba(197, 26, 74, 0.25);
        color: var(--crimson-light);
        font-size: 11px;
        font-weight: 600;
        letter-spacing: 1px;
        text-transform: uppercase;
        margin-bottom: 16px;
    }
    .upload-hero h1 {
        font-size: clamp(28px, 4vw, 38px);
        font-weight: 800;
        line-height: 1.1;
        margin-bottom: 12px;
    }
    .upload-hero h1 .accent { color: var(--crimson-light); }
    .upload-hero p {
        color: var(--text-secondary);
        font-size: 15px;
        line-height: 1.55;
        max-width: 400px;
        margin: 0 auto;
    }

    #dropZone {
        border: 2px dashed var(--border-hover);
        border-radius: 20px;
        padding: 48px 24px;
        cursor: pointer;
        transition: all 0.25s cubic-bezier(0.2, 0, 0.2, 1);
        background: rgba(255, 255, 255, 0.02);
        text-align: center;
        position: relative;
        overflow: hidden;
    }
    [data-theme="light"] #dropZone { background: rgba(0, 0, 0, 0.02); }
    #dropZone:hover {
        border-color: var(--crimson);
        background: var(--crimson-faint);
        transform: translateY(-2px);
        box-shadow: var(--shadow-card);
    }
    #dropZone.drag {
        border-color: var(--crimson);
        background: var(--crimson-dim);
        transform: scale(1.02);
    }
    #dropZone input { display: none; }
    .dz-icon {
        width: 56px; height: 56px;
        background: var(--crimson-dim);
        border-radius: 16px;
        display: inline-flex; align-items: center; justify-content: center;
        margin-bottom: 14px;
        color: var(--crimson-light);
        transition: transform 0.3s;
    }
    #dropZone:hover .dz-icon { transform: scale(1.1) rotate(-5deg); }
    .dz-icon svg { width: 26px; height: 26px; }
    .dz-label { font-size: 15px; color: var(--text-secondary); font-weight: 500; }
    .dz-label b { color: var(--crimson-light); font-weight: 700; }
    .dz-formats { font-size: 11px; color: var(--text-faint); margin-top: 10px; letter-spacing: 1px; text-transform: uppercase; }

    /* ── YouTube URL input alternative ── */
    .alt-input {
        margin-top: 16px;
        display: flex;
        gap: 8px;
        align-items: center;
    }
    .alt-input input {
        flex: 1;
        padding: 10px 14px;
        background: var(--bg-card);
        border: 1px solid var(--border);
        border-radius: 10px;
        color: var(--text);
        font-family: inherit;
        font-size: 13px;
        transition: border-color 0.18s;
    }
    .alt-input input::placeholder { color: var(--text-faint); }
    .alt-input input:focus { border-color: var(--crimson); }

    .quick-features {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
        margin-top: 32px;
    }
    .qf-item {
        padding: 14px;
        background: var(--bg-card);
        border: 1px solid var(--border);
        border-radius: 12px;
        text-align: center;
        transition: all 0.18s;
    }
    .qf-item:hover { border-color: var(--border-hover); transform: translateY(-2px); }
    .qf-item .qf-icon { font-size: 20px; margin-bottom: 6px; }
    .qf-item .qf-title { font-size: 12px; font-weight: 600; color: var(--text); margin-bottom: 2px; }
    .qf-item .qf-sub { font-size: 10px; color: var(--text-faint); }

    /* ═══════════════════════════════════════════
       ANALYZING SCREEN
       ═══════════════════════════════════════════ */
    #analyzingScreen {
        display: none;
        min-height: calc(100vh - 60px);
        align-items: center;
        justify-content: center;
        padding: 24px;
    }
    .analyzing-card {
        max-width: 440px;
        width: 100%;
        text-align: center;
    }
    .pulse-ring {
        position: relative;
        width: 80px;
        height: 80px;
        margin: 0 auto 28px;
    }
    .pulse-ring::before, .pulse-ring::after {
        content: '';
        position: absolute; inset: 0;
        border-radius: 50%;
        border: 2px solid var(--crimson);
        opacity: 0;
        animation: pulse 2.2s cubic-bezier(0, 0, 0.2, 1) infinite;
    }
    .pulse-ring::after { animation-delay: 1.1s; }
    .pulse-ring .core {
        position: absolute; inset: 22px;
        background: var(--crimson);
        border-radius: 50%;
        box-shadow: 0 0 24px var(--crimson-glow);
        display: flex; align-items: center; justify-content: center;
    }
    .pulse-ring .core svg {
        width: 18px; height: 18px; color: #fff;
        animation: spin 2s linear infinite;
    }
    @keyframes pulse {
        0% { transform: scale(0.7); opacity: 0.8; }
        100% { transform: scale(1.5); opacity: 0; }
    }
    @keyframes spin { to { transform: rotate(360deg); } }

    .analyzing-card h2 {
        font-size: 22px;
        font-weight: 700;
        margin-bottom: 8px;
    }
    .analyzing-card p {
        color: var(--text-muted);
        font-size: 14px;
        margin-bottom: 28px;
        min-height: 20px;
    }
    .progress-track {
        height: 4px;
        background: var(--bg-card);
        border-radius: 2px;
        overflow: hidden;
        margin-bottom: 12px;
        border: 1px solid var(--border);
    }
    .progress-fill {
        height: 100%;
        background: linear-gradient(90deg, var(--crimson), var(--crimson-light));
        border-radius: 2px;
        transition: width 0.35s cubic-bezier(0.2, 0, 0.2, 1);
        width: 8%;
        box-shadow: 0 0 12px var(--crimson-glow);
    }
    .progress-steps {
        display: flex;
        justify-content: space-between;
        font-size: 10px;
        color: var(--text-faint);
        font-family: 'JetBrains Mono', monospace;
        letter-spacing: 1px;
        text-transform: uppercase;
    }
    .progress-steps .step.active { color: var(--crimson-light); }
    .progress-steps .step.done { color: var(--text-muted); }

    /* ═══════════════════════════════════════════
       EDITOR SCREEN
       ═══════════════════════════════════════════ */
    #editorScreen { display: none; }

    /* ── Track header ── */
    .track-header {
        display: flex;
        align-items: center;
        gap: 16px;
        padding: 14px 24px;
        border-bottom: 1px solid var(--border);
        background: var(--bg-card);
    }
    .track-name {
        font-family: 'Syne', sans-serif;
        font-size: 16px;
        font-weight: 700;
        color: var(--text);
        flex: 1;
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    .track-meta {
        display: flex;
        gap: 18px;
        font-size: 12px;
        color: var(--text-muted);
        flex-shrink: 0;
    }
    .track-meta .tm-item { display: flex; align-items: center; gap: 6px; }
    .track-meta strong {
        color: var(--text);
        font-weight: 600;
        font-family: 'JetBrains Mono', monospace;
        font-size: 12px;
    }
    .tm-sep {
        width: 1px;
        height: 12px;
        background: var(--border);
    }

    /* ── Mode picker (3 detection styles) ── */
    .mode-bar {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 10px 24px;
        background: var(--bg-card);
        border-bottom: 1px solid var(--border);
        flex-wrap: wrap;
    }
    .mode-bar-label {
        font-size: 10px;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 1.5px;
        color: var(--text-muted);
        flex-shrink: 0;
    }
    .mode-group {
        display: flex;
        gap: 6px;
        flex-wrap: wrap;
        flex: 1;
    }
    .mode-chip {
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 8px 14px;
        background: var(--bg-elevated);
        border: 1px solid var(--border);
        border-radius: 10px;
        cursor: pointer;
        transition: all 0.2s cubic-bezier(0.2, 0, 0.2, 1);
        font-family: inherit;
        min-width: 0;
        text-align: left;
        color: var(--text-secondary);
    }
    .mode-chip:hover {
        border-color: var(--border-hover);
        color: var(--text);
        transform: translateY(-1px);
    }
    .mode-chip.active {
        background: var(--crimson-dim);
        border-color: var(--crimson);
        color: var(--text);
        box-shadow: 0 0 0 3px rgba(197, 26, 74, 0.08);
    }
    .mode-chip .mc-icon { font-size: 18px; flex-shrink: 0; }
    .mode-chip .mc-text { min-width: 0; }
    .mode-chip .mc-title {
        font-family: 'Syne', sans-serif;
        font-weight: 700;
        font-size: 12px;
        letter-spacing: -0.2px;
        white-space: nowrap;
    }
    .mode-chip .mc-sub {
        font-size: 10px;
        color: var(--text-muted);
        white-space: nowrap;
    }
    .mode-chip.active .mc-title { color: var(--crimson-light); }
    .mode-bar-hint {
        font-size: 10px;
        color: var(--text-faint);
        font-family: 'JetBrains Mono', monospace;
        flex-shrink: 0;
        opacity: 0;
        transition: opacity 0.35s;
    }
    .mode-bar-hint.show { opacity: 1; }

    @media (max-width: 720px) {
        .mode-bar { padding: 8px 12px; gap: 8px; }
        .mode-chip { padding: 6px 10px; gap: 6px; }
        .mode-chip .mc-icon { font-size: 16px; }
        .mode-bar-label { display: none; }
    }

    /* ── Minimap ── */
    .minimap-wrap {
        padding: 8px 24px 0;
        background: var(--bg-card);
        border-bottom: 1px solid var(--border);
    }
    .minimap {
        position: relative;
        height: 26px;
        background: var(--bg-deep);
        border-radius: 6px;
        overflow: hidden;
        cursor: pointer;
        border: 1px solid var(--border);
    }
    .minimap .mm-block {
        position: absolute;
        top: 0; bottom: 0;
        transition: opacity 0.15s;
        opacity: 0.75;
    }
    .minimap .mm-block:hover { opacity: 1; }
    .minimap .mm-playhead {
        position: absolute;
        top: 0; bottom: 0;
        width: 2px;
        background: #fff;
        box-shadow: 0 0 6px rgba(255, 255, 255, 0.6);
        pointer-events: none;
        z-index: 3;
        transition: left 0.08s linear;
    }
    .minimap .mm-viewport {
        position: absolute;
        top: -2px; bottom: -2px;
        background: rgba(255, 255, 255, 0.08);
        border: 1px solid rgba(255, 255, 255, 0.3);
        border-radius: 4px;
        pointer-events: none;
        z-index: 2;
        transition: left 0.08s linear, width 0.08s linear;
    }

    /* ── Algorithm picker ── */
    .algo-bar {
        display: flex;
        align-items: center;
        gap: 0;
        padding: 0 24px;
        background: var(--bg-card);
        border-bottom: 1px solid var(--border);
        overflow-x: auto;
        scrollbar-width: none;
    }
    .algo-bar::-webkit-scrollbar { display: none; }
    .algo-tab {
        padding: 10px 12px;
        font-size: 12px;
        font-weight: 500;
        color: var(--text-muted);
        cursor: pointer;
        white-space: nowrap;
        border-bottom: 2px solid transparent;
        transition: all 0.15s;
        user-select: none;
        display: flex;
        align-items: center;
        gap: 5px;
    }
    .algo-tab:hover { color: var(--text); }
    .algo-tab.active {
        color: var(--crimson-light);
        border-bottom-color: var(--crimson);
    }
    .algo-tab .at-icon { font-size: 14px; }
    .algo-tab .at-badge {
        font-family: 'JetBrains Mono', monospace;
        font-size: 10px;
        padding: 1px 5px;
        border-radius: 4px;
        background: rgba(255, 255, 255, 0.06);
        color: var(--text-muted);
    }
    [data-theme="light"] .algo-tab .at-badge { background: rgba(0, 0, 0, 0.06); }
    .algo-tab.active .at-badge { background: var(--crimson-dim); color: var(--crimson-light); }

    /* ── Waveform canvas ── */
    .wave-wrap {
        position: relative;
        background: var(--waveform-bg);
        border-bottom: 1px solid var(--border);
        overflow: hidden;
    }
    .wave-labels {
        position: relative;
        height: 26px;
        background: var(--bg-card);
        border-bottom: 1px solid var(--border);
        overflow: hidden;
    }
    .wv-label {
        position: absolute;
        top: 0; bottom: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        font-family: 'Syne', sans-serif;
        font-size: 10px;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.8px;
        pointer-events: none;
        white-space: nowrap;
        overflow: hidden;
        border-right: 1px solid var(--border);
        transition: background 0.2s, color 0.2s;
    }
    .wv-label.editing {
        pointer-events: all;
        background: var(--bg-elevated);
        border: 1px solid var(--crimson);
        z-index: 10;
    }
    .wave-stage {
        position: relative;
        height: 160px;
    }
    #waveform { height: 160px; position: relative; z-index: 1; }
    #waveform > div { scrollbar-width: none; }
    #waveform > div::-webkit-scrollbar { display: none; }
    #waveCanvas {
        position: absolute;
        top: 0; left: 0;
        z-index: 2;
        pointer-events: none;
    }
    .wv-overlay {
        position: absolute;
        top: 0; left: 0;
        height: 100%;
        z-index: 3;
        pointer-events: none;
    }
    .wv-region {
        position: absolute;
        top: 0; bottom: 0;
        opacity: 0.08;
        mix-blend-mode: screen;
        pointer-events: none;
        transition: opacity 0.2s;
    }
    [data-theme="light"] .wv-region { mix-blend-mode: multiply; opacity: 0.2; }
    .wv-region.active { opacity: 0.25; }
    [data-theme="light"] .wv-region.active { opacity: 0.4; }
    .wv-boundary {
        position: absolute;
        top: 0; bottom: 0;
        width: 2px;
        cursor: ew-resize;
        pointer-events: all;
        z-index: 5;
        transition: box-shadow 0.15s;
    }
    .wv-boundary::before {
        content: '';
        position: absolute;
        top: 0; bottom: 0;
        left: -7px; right: -7px;
    }
    .wv-boundary::after {
        content: '';
        position: absolute;
        top: 50%; left: 50%;
        width: 8px; height: 28px;
        transform: translate(-50%, -50%);
        background: currentColor;
        border-radius: 2px;
        opacity: 0;
        transition: opacity 0.15s;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    }
    .wv-boundary:hover::after,
    .wv-boundary.dragging::after { opacity: 1; }
    .wv-boundary.dragging { z-index: 20; }
    .wv-playhead {
        position: absolute;
        top: 0; bottom: 0;
        width: 2px;
        background: #fff;
        box-shadow: 0 0 10px rgba(255, 255, 255, 0.6);
        pointer-events: none;
        z-index: 4;
        transition: left 0.06s linear;
    }

    /* ── Transport ── */
    .transport {
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 10px 24px;
        background: var(--bg-card);
        border-bottom: 1px solid var(--border);
        font-size: 12px;
        flex-wrap: wrap;
    }
    .time-display {
        font-family: 'JetBrains Mono', monospace;
        font-size: 13px;
        color: var(--text);
        min-width: 46px;
        font-weight: 500;
    }
    .time-display.total { color: var(--text-muted); }
    .transport-divider {
        width: 1px; height: 18px;
        background: var(--border);
        margin: 0 4px;
    }
    .zoom-control {
        display: flex;
        align-items: center;
        gap: 8px;
        color: var(--text-muted);
        font-size: 11px;
    }
    .zoom-control input[type="range"] {
        width: 100px;
        accent-color: var(--crimson);
        height: 3px;
    }
    .transport-info {
        margin-left: auto;
        color: var(--text-faint);
        font-size: 11px;
        font-family: 'JetBrains Mono', monospace;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .transport-info .hotkey {
        display: inline-flex;
        align-items: center;
        gap: 4px;
    }
    .kbd {
        font-family: 'JetBrains Mono', monospace;
        font-size: 10px;
        background: var(--bg-elevated);
        border: 1px solid var(--border);
        border-radius: 3px;
        padding: 1px 5px;
        color: var(--text-secondary);
    }

    /* ── Blocks panel ── */
    .panel {
        padding: 16px 24px;
        background: var(--bg);
    }
    .panel + .panel { border-top: 1px solid var(--border); }
    .panel-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 12px;
        gap: 12px;
    }
    .panel-head h3 {
        font-size: 11px;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 1.5px;
        color: var(--text-muted);
    }
    .panel-head .meta {
        font-size: 11px;
        color: var(--text-faint);
        font-family: 'JetBrains Mono', monospace;
    }

    .block-list {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
        gap: 8px;
    }
    .block-card {
        background: var(--bg-card);
        border: 1px solid var(--border);
        border-left: 4px solid var(--wave-base);
        border-radius: 8px;
        padding: 10px 12px;
        cursor: pointer;
        transition: all 0.18s cubic-bezier(0.2, 0, 0.2, 1);
        display: flex;
        flex-direction: column;
        gap: 4px;
        position: relative;
        overflow: hidden;
    }
    .block-card:hover {
        border-color: var(--border-hover);
        transform: translateY(-2px);
        box-shadow: var(--shadow-card);
    }
    .block-card.playing {
        border-color: var(--crimson);
        background: var(--crimson-faint);
    }
    .block-card.playing::after {
        content: '';
        position: absolute;
        top: 0; right: 0;
        width: 6px; height: 6px;
        margin: 8px;
        border-radius: 50%;
        background: var(--crimson);
        box-shadow: 0 0 8px var(--crimson-glow);
        animation: pulseCard 1.3s ease-in-out infinite;
    }
    @keyframes pulseCard {
        0%, 100% { opacity: 1; transform: scale(1); }
        50% { opacity: 0.5; transform: scale(0.8); }
    }
    .bc-top {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 8px;
    }
    .bc-label-wrap { position: relative; min-width: 0; flex: 1; }
    .bc-label {
        font-family: 'Syne', sans-serif;
        font-weight: 700;
        font-size: 13px;
        color: var(--text);
        background: transparent;
        border: none;
        padding: 0;
        width: 100%;
        cursor: pointer;
        appearance: none;
        letter-spacing: -0.01em;
    }
    .bc-label:focus {
        outline: none;
        cursor: text;
    }
    .bc-drop-icon {
        color: var(--text-faint);
        width: 14px; height: 14px;
        flex-shrink: 0;
    }
    .bc-time {
        font-family: 'JetBrains Mono', monospace;
        font-size: 10px;
        color: var(--text-muted);
        display: flex;
        justify-content: space-between;
    }
    .bc-actions {
        display: flex;
        gap: 2px;
        position: absolute;
        top: 6px; right: 6px;
        opacity: 0;
        transform: translateY(-4px);
        transition: all 0.15s;
    }
    .block-card:hover .bc-actions {
        opacity: 1;
        transform: translateY(0);
    }
    .bc-action {
        width: 22px; height: 22px;
        display: flex; align-items: center; justify-content: center;
        border: none;
        background: var(--bg-elevated);
        color: var(--text-muted);
        border-radius: 4px;
        cursor: pointer;
        transition: all 0.15s;
    }
    .bc-action:hover { background: var(--crimson); color: #fff; }
    .bc-action svg { width: 12px; height: 12px; }

    /* Label dropdown */
    .label-menu {
        position: absolute;
        top: calc(100% + 4px);
        left: 0;
        min-width: 140px;
        background: var(--bg-elevated);
        border: 1px solid var(--border-hover);
        border-radius: 8px;
        padding: 4px;
        box-shadow: var(--shadow-card);
        z-index: 50;
        display: none;
    }
    .label-menu.open { display: block; }
    .label-menu-item {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 6px 10px;
        cursor: pointer;
        border-radius: 5px;
        font-size: 12px;
        color: var(--text);
        transition: background 0.12s;
    }
    .label-menu-item:hover { background: var(--bg-card); }
    .label-menu-item .ls-swatch {
        width: 10px; height: 10px; border-radius: 2px;
    }
    .label-menu-item .ls-shortcut {
        margin-left: auto;
        font-family: 'JetBrains Mono', monospace;
        font-size: 10px;
        color: var(--text-faint);
    }

    /* ── Comparison results (compact algorithm cards) ── */
    .results-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 8px;
    }
    .result-card {
        background: var(--bg-card);
        border: 1px solid var(--border);
        border-radius: 10px;
        padding: 10px 12px;
        cursor: pointer;
        transition: all 0.18s;
        display: flex;
        flex-direction: column;
        gap: 8px;
    }
    .result-card:hover { border-color: var(--border-hover); transform: translateY(-1px); }
    .result-card.active { border-color: var(--crimson); background: var(--crimson-faint); }
    .rc-top {
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .rc-icon { font-size: 15px; flex-shrink: 0; }
    .rc-info { min-width: 0; flex: 1; }
    .rc-name {
        font-size: 12px;
        font-weight: 600;
        color: var(--text);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    .rc-detail {
        font-size: 10px;
        color: var(--text-muted);
        font-family: 'JetBrains Mono', monospace;
        white-space: nowrap;
    }
    .rc-f1 {
        font-family: 'JetBrains Mono', monospace;
        font-size: 13px;
        font-weight: 700;
        flex-shrink: 0;
    }
    .rc-blocks {
        display: flex;
        height: 4px;
        border-radius: 2px;
        overflow: hidden;
        gap: 1px;
    }
    .rc-blocks div { flex-grow: 1; min-width: 2px; }
    .f1-good { color: #4ade80; }
    .f1-ok { color: #fbbf24; }
    .f1-bad { color: var(--text-muted); }

    /* ── Toast ── */
    .toast {
        position: fixed;
        bottom: 24px;
        left: 50%;
        transform: translateX(-50%) translateY(80px);
        background: var(--bg-elevated);
        color: var(--text);
        padding: 10px 16px;
        border-radius: 10px;
        border: 1px solid var(--border-hover);
        font-size: 13px;
        box-shadow: var(--shadow-card);
        z-index: 200;
        opacity: 0;
        pointer-events: none;
        transition: all 0.3s cubic-bezier(0.2, 0, 0.1, 1);
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .toast.show {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
        pointer-events: all;
    }
    .toast.success { border-color: #4ade80; }
    .toast.error { border-color: #f87171; color: #f87171; }

    /* ── Shortcuts hint modal ── */
    .sc-modal {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.7);
        backdrop-filter: blur(4px);
        z-index: 300;
        display: none;
        align-items: center;
        justify-content: center;
        animation: fadeIn 0.2s;
    }
    .sc-modal.open { display: flex; }
    .sc-content {
        background: var(--bg-card);
        border: 1px solid var(--border-hover);
        border-radius: 16px;
        padding: 24px;
        width: 100%;
        max-width: 460px;
        max-height: 80vh;
        overflow-y: auto;
        box-shadow: var(--shadow-card);
    }
    .sc-content h2 {
        font-size: 18px;
        margin-bottom: 4px;
    }
    .sc-content p {
        font-size: 13px;
        color: var(--text-muted);
        margin-bottom: 20px;
    }
    .sc-group { margin-bottom: 18px; }
    .sc-group h4 {
        font-size: 10px;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 1.5px;
        color: var(--text-muted);
        margin-bottom: 8px;
    }
    .sc-row {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 5px 0;
        font-size: 13px;
    }
    .sc-row span:first-child { color: var(--text); }
    .sc-keys { display: flex; gap: 4px; }
    .sc-keys .kbd { font-size: 11px; }

    /* ── Responsive ── */
    @media (max-width: 720px) {
        .track-meta { font-size: 11px; gap: 10px; }
        .track-meta .tm-item { gap: 4px; }
        .panel { padding: 12px 16px; }
        .algo-bar { padding: 0 16px; }
        .transport { padding: 8px 16px; gap: 6px; }
        .transport-info { display: none; }
        .quick-features { grid-template-columns: 1fr; }
    }
    @media (prefers-reduced-motion: reduce) {
        *, *::before, *::after {
            animation-duration: 0.01s !important;
            transition-duration: 0.01s !important;
        }
    }