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

:root {
    --bg-gradient-start: #667eea;
    --bg-gradient-end: #764ba2;
    --container-bg: white;
    --controls-bg: #f8f9fa;
    --text-primary: #333;
    --text-secondary: #555;
    --text-tertiary: #999;
    --border-color: #e0e0e0;
    --select-border: #667eea;
    --line-bg: white;
    --line-hover-bg: #f0f0f0;
    --timestamp-color: #999;
    --card-bg: white;
    --hover-bg: #f0f0f0;
    --text-color: #333;
}

body.dark-mode {
    --bg-gradient-start: #1a1a2e;
    --bg-gradient-end: #16213e;
    --container-bg: #0f1419;
    --controls-bg: #1a1f2e;
    --text-primary: #e4e4e7;
    --text-secondary: #d4d4d8;
    --text-tertiary: #71717a;
    --border-color: #2d3748;
    --select-border: #93a8f5;
    --line-bg: #1a1f2e;
    --line-hover-bg: #252b3a;
    --timestamp-color: #71717a;
    --card-bg: #1a1f2e;
    --hover-bg: #252b3a;
    --text-color: #e4e4e7;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
    padding: 20px;
    transition: background 0.3s ease;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--container-bg);
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    transition: background 0.3s ease;
}

.controls-bar {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: var(--controls-bg);
    border-radius: 10px;
    margin-bottom: 0;
    transition: background 0.3s ease;
}

#audioSelect {
    padding: 10px 20px;
    font-size: 1em;
    border: 2px solid var(--select-border);
    border-radius: 8px;
    background: var(--container-bg);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    flex-shrink: 0;
    width: 150px;
}

#audioSelect:hover {
    border-color: #764ba2;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

#audioSelect:focus {
    outline: none;
    border-color: #764ba2;
}

.theme-toggle {
    padding: 8px;
    background: var(--container-bg);
    border: 2px solid var(--select-border);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    color: var(--text-primary);
}

.theme-toggle:hover {
    border-color: #764ba2;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.theme-toggle .sun-icon {
    display: none;
}

.theme-toggle .moon-icon {
    display: none;
}

.theme-toggle .auto-icon {
    display: block;
}

.player-container {
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.audio-player {
    display: flex;
    align-items: center;
    flex: 1;
}

#audioPlayer {
    width: 100%;
    outline: none;
}

.transcription-container {
    background: var(--controls-bg);
    border-radius: 10px;
    padding: 0;
    max-height: calc(100vh - 200px);
    overflow-y: auto;
    margin-top: 20px;
    transition: background 0.3s ease;
}

.transcription-header {
    position: sticky;
    top: 0;
    background: var(--controls-bg);
    z-index: 10;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 20px 15px 20px;
    border-bottom: 2px solid var(--border-color);
    transition: background 0.3s ease, border-color 0.3s ease;
}

.search-container {
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 300px;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .search-container {
        min-width: 250px;
        flex: 1;
    }
}

.search-input {
    flex: 1;
    padding: 10px 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--container-bg);
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.3s ease;
    outline: none;
}

.search-input:focus {
    border-color: var(--select-border);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.search-input::placeholder {
    color: var(--text-tertiary);
}

.clear-search-btn {
    background: var(--controls-bg);
    border: 2px solid var(--border-color);
    border-radius: 6px;
    padding: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.7;
}

.clear-search-btn:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
    opacity: 1;
}

.search-results {
    font-size: 12px;
    color: var(--text-tertiary);
    white-space: nowrap;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.download-dropdown {
    position: relative;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9em;
    font-weight: 500;
    transition: all 0.3s ease;
}

.download-btn:hover {
    background: #764ba2;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

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

.download-btn svg {
    flex-shrink: 0;
}

.dropdown-arrow {
    transition: transform 0.3s ease;
}

.download-dropdown.active .dropdown-arrow {
    transform: rotate(180deg);
}

.download-options {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    min-width: 180px;
}

.download-dropdown.active .download-options {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.download-option {
    display: block;
    width: 100%;
    padding: 10px 16px;
    background: transparent;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: 0.9em;
    color: var(--text-color);
    transition: background-color 0.2s ease;
}

.download-option:hover {
    background: var(--hover-bg);
}

.download-option:first-child {
    border-radius: 6px 6px 0 0;
}

.download-option:last-child {
    border-radius: 0 0 6px 6px;
}

.autoscroll-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    user-select: none;
    font-size: 0.95em;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.autoscroll-toggle input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: #667eea;
}

.autoscroll-toggle:hover span {
    color: #667eea;
}

.transcription-display {
    line-height: 1.8;
    padding: 20px;
}

.transcription-line {
    margin-bottom: 15px;
    padding: 12px 15px;
    background: var(--line-bg);
    border-radius: 8px;
    border-left: 4px solid #667eea;
    transition: all 0.3s ease;
    cursor: pointer;
}

.transcription-line.speaker-color-0 {
    border-left-color: #93a8f5;
}

.transcription-line.speaker-color-1 {
    border-left-color: #fbbf7a;
}

.transcription-line.speaker-color-2 {
    border-left-color: #6dd4ad;
}

.transcription-line.speaker-color-3 {
    border-left-color: #f4a5ce;
}

.transcription-line.speaker-color-4 {
    border-left-color: #b392f0;
}

.transcription-line.speaker-color-5 {
    border-left-color: #67d4e8;
}

.transcription-line:hover {
    background: var(--line-hover-bg);
    transform: translateX(5px);
}

.transcription-line.active {
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.2);
}

.transcription-line.active.speaker-color-0 {
    background: #eef2ff;
}

.transcription-line.active.speaker-color-1 {
    background: #fff7ed;
}

.transcription-line.active.speaker-color-2 {
    background: #ecfdf5;
}

.transcription-line.active.speaker-color-3 {
    background: #fdf2f8;
}

.transcription-line.active.speaker-color-4 {
    background: #f5f3ff;
}

.transcription-line.active.speaker-color-5 {
    background: #ecfeff;
}

.line-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.speaker {
    font-weight: bold;
    font-size: 0.95em;
}

.speaker-color-0 .speaker {
    color: #93a8f5;
}

.speaker-color-1 .speaker {
    color: #fbbf7a;
}

.speaker-color-2 .speaker {
    color: #6dd4ad;
}

.speaker-color-3 .speaker {
    color: #f4a5ce;
}

.speaker-color-4 .speaker {
    color: #b392f0;
}

.speaker-color-5 .speaker {
    color: #67d4e8;
}

.timestamp {
    font-size: 0.75em;
    color: var(--timestamp-color);
    font-weight: normal;
    transition: color 0.3s ease;
}

.text {
    color: var(--text-primary);
    line-height: 1.6;
    transition: color 0.3s ease;
}

.loading {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
    padding: 20px;
    transition: color 0.3s ease;
}

.error {
    color: #ef4444;
    text-align: center;
    padding: 20px;
    background: rgba(239, 68, 68, 0.1);
    border-radius: 8px;
    transition: background 0.3s ease;
}

/* Scrollbar styling */
.transcription-container::-webkit-scrollbar {
    width: 8px;
}

.transcription-container::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

.transcription-container::-webkit-scrollbar-thumb {
    background: #667eea;
    border-radius: 10px;
}

.transcription-container::-webkit-scrollbar-thumb:hover {
    background: #764ba2;
}

/* Search highlight styles */
.text mark {
    background: #fbbf7a;
    color: #1a202c;
    padding: 2px 4px;
    border-radius: 3px;
    font-weight: 600;
}

body.dark-mode .text mark {
    background: #d69e2e;
    color: #1a202c;
}