/* ═══════════════════════════════════════════════════════════════
   Audio2Face Lip Sync Studio — Stylesheet
   Premium dark glassmorphism with gradient accents
   ═══════════════════════════════════════════════════════════════ */

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

:root {
    --bg-dark: #d8d2dc;
    --bg-panel: rgba(14, 14, 24, 0.88);
    --bg-panel-border: rgba(255, 255, 255, 0.06);
    --bg-input: rgba(255, 255, 255, 0.035);
    --bg-zone: rgba(255, 255, 255, 0.02);
    --bg-zone-hover: rgba(108, 99, 255, 0.06);
    --bg-zone-active: rgba(108, 99, 255, 0.1);
    --accent: #7c6fff;
    --accent-secondary: #a78bfa;
    --accent-glow: rgba(124, 111, 255, 0.3);
    --accent-hover: #8f85ff;
    --gradient-primary: linear-gradient(135deg, #7c6fff, #a78bfa);
    --gradient-glow: linear-gradient(135deg, rgba(124, 111, 255, 0.2), rgba(167, 139, 250, 0.1));
    --text-primary: #ebebf0;
    --text-secondary: rgba(255, 255, 255, 0.5);
    --text-muted: rgba(255, 255, 255, 0.25);
    --success: #34d399;
    --success-bg: rgba(52, 211, 153, 0.08);
    --warning: #fbbf24;
    --warning-bg: rgba(251, 191, 36, 0.08);
    --error: #f87171;
    --error-bg: rgba(248, 113, 113, 0.08);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-xs: 6px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --shadow-panel: 0 12px 48px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.03) inset;
}

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

/* ── Canvas ────────────────────────────────────────────────── */
#viewport {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
}

/* ── Loading Overlay ───────────────────────────────────────── */
#loading-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-dark);
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

#loading-overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader-ring {
    width: 52px;
    height: 52px;
    border: 2.5px solid rgba(124, 111, 255, 0.12);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.85s linear infinite;
}

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

.loader-text {
    margin-top: 20px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.04em;
}

/* ── Control Panel ─────────────────────────────────────────── */
#controls {
    position: fixed;
    top: 24px;
    right: 24px;
    bottom: 24px;
    z-index: 100;
    width: min(440px, calc(100% - 48px));
    display: flex;
    flex-direction: column;
}

.panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-panel);
    backdrop-filter: blur(48px) saturate(1.6);
    -webkit-backdrop-filter: blur(48px) saturate(1.6);
    border: 1px solid var(--bg-panel-border);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: var(--shadow-panel);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--accent) transparent;
}

.panel-title {
    font-size: 15px;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.accent {
    color: var(--accent);
    font-size: 10px;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.35;
    }
}

/* ── Upload Zones ──────────────────────────────────────────── */
.upload-zone {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 16px 14px;
    margin-bottom: 10px;
    background: var(--bg-zone);
    border: 1.5px dashed rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
    min-height: 80px;
}

.upload-zone:hover {
    background: var(--bg-zone-hover);
    border-color: rgba(124, 111, 255, 0.25);
}

.upload-zone.drag-over {
    background: var(--bg-zone-active);
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.upload-zone.has-file {
    border-style: solid;
    border-color: rgba(52, 211, 153, 0.3);
    background: rgba(52, 211, 153, 0.04);
}

.upload-icon {
    width: 28px;
    height: 28px;
    color: var(--text-muted);
    margin-bottom: 6px;
    transition: color var(--transition);
}

.upload-zone:hover .upload-icon {
    color: var(--accent);
}

.upload-zone.has-file .upload-icon {
    color: var(--success);
}

.upload-label {
    font-size: 12.5px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

.upload-link {
    color: var(--accent);
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.upload-hint {
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

.upload-zone.has-file .upload-hint {
    color: var(--success);
    font-weight: 500;
}

/* ── TTS Zone & Divider ────────────────────────────────────── */
.input-divider {
    display: flex;
    align-items: center;
    color: var(--text-muted);
    font-size: 10px;
    font-weight: 600;
    margin: 8px 0;
}

.input-divider::before,
.input-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: rgba(255, 255, 255, 0.08);
}

.input-divider span {
    padding: 0 10px;
    letter-spacing: 1px;
}

.tts-zone {
    margin-bottom: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.tts-textarea {
    width: 100%;
    min-height: 80px;
    background: var(--bg-zone);
    border: 1.5px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    padding: 12px;
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 13px;
    resize: vertical;
    outline: none;
    transition: all var(--transition);
}

.tts-textarea:focus {
    background: var(--bg-zone-active);
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.btn-secondary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    font-family: var(--font);
    font-weight: 600;
    font-size: 13px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
}

.btn-secondary:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-secondary:active:not(:disabled) {
    transform: translateY(1px);
}

.btn-secondary:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

/* ── UI Toggle Button ──────────────────────────────────────── */
.ui-toggle-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1001;
    width: 48px;
    height: 48px;
    background: var(--bg-panel);
    border: 1px solid var(--bg-panel-border);
    border-radius: 14px;
    color: var(--text-primary);
    display: none;
    /* Desktop hidden */
    align-items: center;
    justify-content: center;
    cursor: pointer;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    transition: all var(--transition);
}

.ui-toggle-btn:hover {
    background: var(--bg-input);
    border-color: var(--accent);
}

.ui-toggle-btn.active {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 0 20px var(--accent-glow);
}

.ui-toggle-btn svg {
    width: 24px;
    height: 24px;
}

/* ── Button ────────────────────────────────────────────────── */
.btn-primary {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    margin-top: 4px;
    background: var(--gradient-primary);
    color: #fff;
    font-family: var(--font);
    font-weight: 600;
    font-size: 13.5px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
    letter-spacing: 0.01em;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px var(--accent-glow);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-icon {
    width: 16px;
    height: 16px;
}

/* ── Progress ──────────────────────────────────────────────── */
.progress-container {
    display: none;
    margin-top: 12px;
}

.progress-container.active {
    display: block;
}

.progress-bar {
    width: 100%;
    height: 3px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: var(--progress, 0%);
    background: var(--gradient-primary);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.progress-bar.indeterminate::after {
    width: 30%;
    animation: indeterminate 1.5s ease-in-out infinite;
}

@keyframes indeterminate {
    0% {
        left: -30%;
    }

    100% {
        left: 100%;
    }
}

.progress-text {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-secondary);
    text-align: center;
    margin-top: 6px;
}

/* ── Status ────────────────────────────────────────────────── */
.status {
    margin-top: 10px;
    padding: 7px 12px;
    font-size: 11.5px;
    font-weight: 500;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-xs);
    text-align: center;
    transition: color var(--transition), background var(--transition);
}

.status.speaking {
    color: var(--accent);
    background: rgba(124, 111, 255, 0.08);
}

.status.error {
    color: var(--error);
    background: var(--error-bg);
}

.status.success {
    color: var(--success);
    background: var(--success-bg);
}

.status.processing {
    color: var(--warning);
    background: var(--warning-bg);
}

/* ── Debug Panel ───────────────────────────────────────────── */
.debug-panel {
    margin-top: 10px;
    font-size: 11px;
    color: var(--text-muted);
}

.debug-panel summary {
    cursor: pointer;
    user-select: none;
    padding: 5px 0;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition);
    font-size: 11px;
}

.debug-panel summary:hover {
    color: var(--text-primary);
}

#debug-content {
    padding: 8px 0 2px;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

#debug-content p {
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    font-size: 10.5px;
    color: var(--text-muted);
}

/* ── Advanced Settings ─────────────────────────────────── */
.settings-panel {
    margin: 14px 0;
    padding-top: 14px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

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

.tabs {
    display: flex;
    gap: 4px;
    background: var(--bg-input);
    padding: 3px;
    border-radius: var(--radius-xs);
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 11px;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition);
}

.tab-btn.active {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.reset-all {
    background: transparent;
    border: none;
    color: var(--accent-secondary);
    font-family: var(--font);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity var(--transition);
}

.reset-all:hover {
    opacity: 1;
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease-out;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(4px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.setting-group.full-width {
    grid-column: span 2;
}

.setting-group label {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
}

.setting-group .val {
    color: var(--accent);
    font-family: monospace;
    font-weight: 600;
}

/* Custom Range Input */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--bg-dark);
    box-shadow: 0 0 10px var(--accent-glow);
    transition: transform 0.1s ease;
}

input[type="range"]:active::-webkit-slider-thumb {
    transform: scale(1.3);
}

/* ── Blendshapes Tab ───────────────────────────────────────── */
.search-container {
    margin-bottom: 16px;
}

.bs-search-input {
    width: 100%;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 14px;
    padding: 14px 18px;
    color: var(--text-primary);
    font-size: 13px;
    font-family: var(--font);
    outline: none;
    transition: all var(--transition);
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.15);
}

.bs-search-input:focus {
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.06);
    box-shadow: 0 0 0 3px var(--accent-glow), inset 0 2px 8px rgba(0, 0, 0, 0.15);
}

.bs-grid {
    gap: 16px !important;
}

.bs-setting-group {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 16px;
    grid-column: span 2;
}

.bs-setting-group:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
}

.bs-name {
    font-size: 10px;
    font-weight: 700;
    color: var(--accent);
    margin: 0 0 12px 0;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.bs-setting-group .setting-group {
    margin-bottom: 12px;
}

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

/* ── Lighting Tab — Glassmorphism ──────────────────────────── */
.lighting-section {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.lighting-group {
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 14px;
    padding: 14px 16px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow:
        0 2px 12px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.lighting-group:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(124, 111, 255, 0.2);
    box-shadow:
        0 4px 20px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.08),
        0 0 20px rgba(124, 111, 255, 0.05);
}

.lighting-group-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.02em;
}

.light-icon {
    width: 16px;
    height: 16px;
    color: var(--accent);
    flex-shrink: 0;
    opacity: 0.85;
    transition: opacity 0.2s ease;
}

.lighting-group:hover .light-icon {
    opacity: 1;
}

.glass-divider {
    height: 1px;
    background: linear-gradient(90deg,
            transparent,
            rgba(255, 255, 255, 0.06) 30%,
            rgba(124, 111, 255, 0.12) 50%,
            rgba(255, 255, 255, 0.06) 70%,
            transparent);
    margin: 2px 0;
}

.lighting-group .settings-grid {
    gap: 10px;
}

/* ──────────────────────────────────────────────────────────── */

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 768px) {
    .ui-toggle-btn {
        display: flex;
    }

    #controls {
        top: auto;
        right: 0;
        left: 0;
        bottom: 0;
        width: 100%;
        max-height: 85vh;
        /* Take up most but not all screen */
        height: auto;
        transform: translateY(100%);
        transition: transform 0.5s cubic-bezier(0.19, 1, 0.22, 1);
        z-index: 1000;
    }

    #controls.visible {
        transform: translateY(0);
    }

    .panel {
        border-radius: 28px 28px 0 0;
        border-bottom: none;
        padding-bottom: 40px;
        /* Extra space for home bar */
    }

    .settings-grid {
        grid-template-columns: 1fr;
        /* Single column on narrow screens */
    }

    .setting-group.full-width {
        grid-column: span 1;
    }
}

@media (max-width: 520px) {
    .panel {
        padding: 18px;
    }

    .upload-zone {
        padding: 12px 10px;
        min-height: 68px;
    }
}

/* ── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.15);
}