/* CSS Variables */
:root {
    --color-bg: #0f0f0f;
    --color-surface: #1a1a1a;
    --color-surface-hover: #252525;
    --color-border: #333;
    --color-text: #fff;
    --color-text-secondary: #999;
    --color-primary: #4f46e5;
    --color-primary-hover: #6366f1;
    --color-danger: #dc2626;
    --color-danger-hover: #ef4444;
    --color-recording: #ef4444;
    --radius: 8px;
    --radius-lg: 12px;
}

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

/* Base */
html, body {
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
}

/* Utility */
.hidden {
    display: none !important;
}

/* Layout */
.app {
    min-height: 100%;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.logo {
    font-size: 1.25rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo svg {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
}

/* Folder Section */
.folder-section {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.folder-section svg {
    width: 16px;
    height: 16px;
}

.folder-name {
    color: var(--color-text);
}

.change-folder-btn {
    background: none;
    border: none;
    color: var(--color-primary);
    cursor: pointer;
    font-size: 0.875rem;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius);
}

.change-folder-btn:hover {
    background: var(--color-surface);
    color: var(--color-primary-hover);
}

/* GitHub Link */
.github-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    color: var(--color-text-secondary);
    border-radius: var(--radius);
    transition: color 0.15s, background-color 0.15s;
}

.github-link:hover {
    color: var(--color-text);
    background: var(--color-surface);
}

.github-link svg {
    width: 20px;
    height: 20px;
}

/* Main Content */
.main {
    flex: 1;
    padding: 2rem 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Unsupported Banner */
.unsupported-banner {
    background: var(--color-danger);
    color: white;
    padding: 1rem 1.5rem;
    text-align: center;
}

.unsupported-banner h2 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.unsupported-banner p {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* No Folder Section */
.no-folder-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 4rem 2rem;
    gap: 1.5rem;
}

.no-folder-section svg {
    width: 64px;
    height: 64px;
    color: var(--color-text-secondary);
}

.no-folder-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.no-folder-section p {
    color: var(--color-text-secondary);
    max-width: 400px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background-color 0.15s, transform 0.1s;
}

.btn:active {
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn svg {
    width: 20px;
    height: 20px;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-hover);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
    border-radius: var(--radius-lg);
}

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

/* Ready Section */
.ready-section {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Recording Options */
.recording-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    max-width: 400px;
    margin: 0 auto;
}

.option-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    min-width: 180px;
}

.option-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.option-label svg {
    width: 16px;
    height: 16px;
}

.option-select {
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-text);
    cursor: pointer;
    min-width: 180px;
}

.option-select:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* Input Row - Select + Toggle */
.input-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    width: 100%;
}

.input-row .option-select {
    flex: 1;
    min-width: 0;
}

/* Toggle Switch */
.toggle {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

.toggle input {
    display: none;
}

.toggle-slider {
    position: relative;
    width: 44px;
    height: 24px;
    background: var(--color-border);
    border-radius: 12px;
    transition: background-color 0.2s;
}

.toggle-slider::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    transition: transform 0.2s;
}

.toggle input:checked + .toggle-slider {
    background: var(--color-primary);
}

.toggle input:checked + .toggle-slider::after {
    transform: translateX(20px);
}

.toggle-label {
    font-size: 0.875rem;
    color: var(--color-text);
    min-width: 24px;
}

/* Previews Container */
.previews-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    padding: 1rem 0;
    flex-wrap: wrap;
}

/* Audio Preview */
.audio-preview-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.audio-meter {
    width: 60px;
    height: 150px;
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    align-items: flex-end;
    padding: 4px;
}

.audio-level {
    width: 100%;
    height: 0%;
    background: linear-gradient(to top, var(--color-primary), #22c55e);
    border-radius: var(--radius);
    transition: height 0.05s ease-out;
}

.audio-label {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

/* Camera Preview */
.camera-preview-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.camera-preview {
    width: 200px;
    height: 150px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    background: var(--color-bg);
    border: 2px solid var(--color-border);
}

.record-controls {
    display: flex;
    justify-content: center;
    padding: 1rem 0;
}

/* Recording Section */
.recording-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    padding: 3rem 0;
}

.recording-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 600;
}

.recording-dot {
    width: 16px;
    height: 16px;
    background: var(--color-recording);
    border-radius: 50%;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.btn-stop {
    background: var(--color-danger);
    color: white;
}

.btn-stop:hover:not(:disabled) {
    background: var(--color-danger-hover);
}

/* Library */
.library-section h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text-secondary);
}

.library-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.library-empty {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    color: var(--color-text-secondary);
    text-align: center;
    gap: 0.5rem;
}

.library-empty svg {
    opacity: 0.5;
    margin-bottom: 0.5rem;
}

.library-empty-hint {
    font-size: 0.875rem;
    opacity: 0.7;
}

/* Recording Card */
.recording-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: background-color 0.15s, transform 0.1s;
    display: flex;
    flex-direction: column;
    position: relative;
}

.recording-card:hover {
    background: var(--color-surface-hover);
    transform: translateY(-2px);
}

.recording-thumbnail {
    aspect-ratio: 16 / 9;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    position: relative;
    overflow: hidden;
}

.recording-thumbnail .thumbnail-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.play-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);
    opacity: 0;
    transition: opacity 0.15s;
}

.recording-card:hover .play-overlay {
    opacity: 1;
}

.play-overlay svg {
    width: 48px;
    height: 48px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.5));
}

.recording-info {
    padding: 0.75rem 1rem;
}

.recording-title {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.25rem;
}

.recording-meta {
    display: flex;
    gap: 0.75rem;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

.recording-delete {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    width: 32px;
    height: 32px;
    border: none;
    border-radius: var(--radius);
    background: rgba(0, 0, 0, 0.6);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.15s, background-color 0.15s;
}

.recording-card:hover .recording-delete {
    opacity: 1;
}

.recording-delete:hover {
    background: var(--color-danger);
}

.recording-delete svg {
    width: 18px;
    height: 18px;
}

/* Player Modal */
.player-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
}

.player-modal.visible {
    opacity: 1;
    visibility: visible;
}

.player-container {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
}

.player-video {
    max-width: 90vw;
    max-height: 90vh;
    border-radius: var(--radius-lg);
    background: black;
}

.player-close {
    position: absolute;
    top: -40px;
    right: 0;
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 50%;
    background: var(--color-surface);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.15s;
}

.player-close:hover {
    background: var(--color-surface-hover);
}

.player-close svg {
    width: 20px;
    height: 20px;
}

/* Responsive */
@media (max-width: 640px) {
    .header {
        flex-direction: column;
        align-items: flex-start;
    }

    .folder-section {
        width: 100%;
        justify-content: space-between;
    }

    .library-grid {
        grid-template-columns: 1fr;
    }
}