@property --border-angle {
    syntax: '<angle>';
    initial-value: 0deg;
    inherits: false;
}

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

:root {
    --bg: #000000;
    --bg-card: #141414;
    --bg-card-hover: #1A1A1A;
    --bg-input: #0A0A0A;
    --text: #FFFFFF;
    --text-secondary: #888888;
    --text-muted: #555555;
    --accent-blue: #4A9EFF;
    --accent-green: #34D399;
    --accent-purple: #A78BFA;
    --accent-orange: #FB923C;
    --accent-pink: #F472B6;
    --accent-teal: #2DD4BF;
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --radius-pill: 999px;
    --shadow-card: 0 2px 16px rgba(0,0,0,0.4);
    --shadow-hover: 0 8px 32px rgba(0,0,0,0.6);
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

html, body {
    height: 100%;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ── App Shell ─────────────────────────────────────────── */

.app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0 20px;
}

.header {
    text-align: center;
    padding-top: 64px;
    padding-bottom: 40px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 12px;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: var(--accent-purple);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.logo-text {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.tagline {
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
}

.main {
    width: 100%;
    max-width: 560px;
    flex: 1;
}

.footer {
    padding: 32px 0;
    text-align: center;
}

.footer p {
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 500;
}

/* ── Sections ─────────────────────────────────────────── */

.section {
    display: none;
    animation: fadeUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.section.active {
    display: block;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Upload Zone ──────────────────────────────────────── */

.upload-zone {
    border: 2px dashed #2A2A2A;
    border-radius: var(--radius-xl);
    padding: 64px 32px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    background: var(--bg-card);
}

.upload-zone:hover,
.upload-zone.drag-over {
    border-color: var(--accent-purple);
    background: #1A1A2A;
    box-shadow: 0 0 48px rgba(167, 139, 250, 0.08);
}

.upload-zone.drag-over {
    transform: scale(1.01);
}

.upload-icon-ring {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: white;
    transition: transform var(--transition);
}

.upload-zone:hover .upload-icon-ring {
    transform: scale(1.05);
}

.upload-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.3px;
}

.upload-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 4px;
}

.upload-limit {
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 500;
    margin-top: 8px;
}

/* ── Status Pills ─────────────────────────────────────── */

.status-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    gap: 16px;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 14px 28px;
    border-radius: var(--radius-pill);
    font-size: 15px;
    font-weight: 600;
    position: relative;
    background: var(--bg-card);
    z-index: 1;
}

.status-pill::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    z-index: -1;
    background: conic-gradient(
        from var(--border-angle),
        transparent 40%,
        var(--pill-color) 50%,
        transparent 60%
    );
    animation: rotateBorder 2s linear infinite;
}

.status-pill::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: var(--bg-card);
    z-index: -1;
}

.status-pill.extracting { --pill-color: var(--accent-green); }
.status-pill.generating { --pill-color: var(--accent-blue); }

@keyframes rotateBorder {
    to { --border-angle: 360deg; }
}

.pill-spinner {
    width: 18px;
    height: 18px;
    border: 2.5px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.extracting .pill-spinner { color: var(--accent-green); }
.generating .pill-spinner { color: var(--accent-blue); }

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

.status-file {
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 500;
}

.status-sub {
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 500;
}

/* ── Cards ────────────────────────────────────────────── */

.card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: 24px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-card);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.card-title-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-title-group h3 {
    font-size: 16px;
    font-weight: 700;
    letter-spacing: -0.2px;
}

.card-icon {
    width: 32px;
    height: 32px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.card-icon.green { background: var(--accent-green); }
.card-icon.purple { background: var(--accent-purple); }
.card-icon.blue { background: var(--accent-blue); }
.card-icon.orange { background: var(--accent-orange); }

.badge {
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    font-size: 12px;
    font-weight: 600;
    background: rgba(255,255,255,0.08);
    color: var(--text-secondary);
}

.badge.blue {
    background: rgba(74, 158, 255, 0.15);
    color: var(--accent-blue);
}

/* ── Text Area ────────────────────────────────────────── */

.text-area {
    width: 100%;
    min-height: 180px;
    max-height: 320px;
    background: var(--bg-input);
    border: 1px solid #1E1E1E;
    border-radius: var(--radius-md);
    padding: 16px;
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    line-height: 1.7;
    color: var(--text);
    resize: vertical;
    transition: border-color var(--transition);
}

.text-area:focus {
    outline: none;
    border-color: var(--accent-purple);
}

.text-area::placeholder {
    color: var(--text-muted);
}

/* ── Settings ─────────────────────────────────────────── */

.settings-body {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.setting-row {
    display: flex;
    gap: 16px;
}

.flex-1 { flex: 1; }

.setting-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Voice Grid */

.voice-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.voice-pill {
    padding: 8px 16px;
    border-radius: var(--radius-pill);
    border: 1px solid #2A2A2A;
    background: transparent;
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.voice-pill:hover {
    border-color: #444;
    color: var(--text);
    background: #1A1A1A;
}

.voice-pill.active {
    border-color: var(--accent-purple);
    background: rgba(167, 139, 250, 0.12);
    color: var(--accent-purple);
}

/* Emotion Grid */

.emotion-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.emotion-pill {
    padding: 8px 14px;
    border-radius: var(--radius-pill);
    border: 1px solid #2A2A2A;
    background: transparent;
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}

.emotion-pill:hover {
    border-color: #444;
    color: var(--text);
}

.emotion-pill.active {
    border-color: var(--accent-teal);
    background: rgba(45, 212, 191, 0.1);
    color: var(--accent-teal);
}

/* Slider */

.slider-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
}

.slider {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    border-radius: 3px;
    background: #2A2A2A;
    outline: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-purple);
    cursor: pointer;
    border: 3px solid var(--bg-card);
    box-shadow: 0 2px 8px rgba(167, 139, 250, 0.3);
    transition: transform var(--transition);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-purple);
    cursor: pointer;
    border: 3px solid var(--bg-card);
}

.slider-value {
    font-size: 14px;
    font-weight: 700;
    color: var(--text);
    min-width: 36px;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

/* ── Buttons ──────────────────────────────────────────── */

.btn-generate {
    width: 100%;
    padding: 18px 32px;
    border-radius: var(--radius-lg);
    border: none;
    background: linear-gradient(135deg, var(--accent-blue), #6366F1);
    color: white;
    font-family: 'Inter', sans-serif;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: all var(--transition);
    margin-top: 8px;
    letter-spacing: -0.2px;
}

.btn-generate:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(74, 158, 255, 0.25);
}

.btn-generate:active {
    transform: translateY(0);
}

.btn-generate:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-download {
    flex: 1;
    padding: 14px 24px;
    border-radius: var(--radius-md);
    border: none;
    background: var(--accent-green);
    color: #000;
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all var(--transition);
    text-decoration: none;
}

.btn-download:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(52, 211, 153, 0.3);
}

.btn-secondary {
    padding: 14px 24px;
    border-radius: var(--radius-md);
    border: 1px solid #2A2A2A;
    background: transparent;
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-secondary:hover {
    border-color: #444;
    color: var(--text);
    background: #1A1A1A;
}

.audio-actions {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

/* ── Audio Player ─────────────────────────────────────── */

.audio-card {
    padding-bottom: 20px;
}

#audio-player {
    display: none;
}

.player-wrap {
    display: flex;
    align-items: center;
    gap: 16px;
}

.play-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: none;
    background: var(--accent-blue);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition);
    flex-shrink: 0;
}

.play-btn:hover {
    transform: scale(1.06);
    box-shadow: 0 4px 16px rgba(74, 158, 255, 0.3);
}

.play-btn:active {
    transform: scale(0.97);
}

.progress-track {
    flex: 1;
    height: 6px;
    background: #2A2A2A;
    border-radius: 3px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent-blue);
    border-radius: 3px;
    width: 0%;
    transition: width 0.1s linear;
}

.time-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 40px;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

/* ── Error Card ───────────────────────────────────────── */

.error-card {
    text-align: center;
    padding: 48px 32px;
}

.error-card .card-icon {
    margin: 0 auto 16px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

.error-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.error-card p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 24px;
    line-height: 1.5;
}

/* ── Responsive ───────────────────────────────────────── */

@media (max-width: 480px) {
    .header {
        padding-top: 40px;
        padding-bottom: 28px;
    }

    .logo-text {
        font-size: 24px;
    }

    .upload-zone {
        padding: 48px 24px;
    }

    .upload-title {
        font-size: 19px;
    }

    .card {
        padding: 20px;
    }

    .voice-pill, .emotion-pill {
        padding: 7px 12px;
        font-size: 12px;
    }

    .btn-generate {
        padding: 16px 24px;
        font-size: 15px;
    }
}