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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #1e1e1e 0%, #2d2d2d 100%);
    color: #ffffff;
    min-height: 100vh;
    line-height: 1.6;
    outline: none; /* Remove focus outline since we're using it for keyboard events */
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px 0;
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #00d4ff, #ff6b6b, #ffa502);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

header p {
    color: #b0b0b0;
    font-size: 1.1rem;
}

.platform-info {
    background: rgba(0, 212, 255, 0.1);
    color: #00d4ff;
    padding: 8px 16px;
    border-radius: 20px;
    margin: 10px 0;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid rgba(0, 212, 255, 0.3);
    display: inline-block;
}

.platform-info.windows {
    background: rgba(0, 123, 255, 0.1);
    color: #007bff;
    border-color: rgba(0, 123, 255, 0.3);
}

.platform-info.macos {
    background: rgba(46, 213, 115, 0.1);
    color: #2ed573;
    border-color: rgba(46, 213, 115, 0.3);
}

.user-interaction-notice {
    background: linear-gradient(135deg, #ffa502, #ff7675);
    color: white;
    padding: 10px 20px;
    border-radius: 25px;
    margin-top: 15px;
    font-size: 0.95rem;
    font-weight: 600;
    box-shadow: 0 5px 15px rgba(255, 165, 2, 0.3);
    animation: pulse 2s infinite;
    display: inline-block;
}

.user-interaction-notice span {
    display: flex;
    align-items: center;
    gap: 8px;
}

body.user-interacted .user-interaction-notice {
    display: none;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Player Management Controls */
.player-management {
    background: rgba(255, 255, 255, 0.05);
    padding: 20px;
    border-radius: 15px;
    margin-bottom: 30px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.management-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
    margin-bottom: 15px;
}

.add-player-btn, .add-videos-btn, .sync-btn, .pause-all-btn, .play-all-btn {
    padding: 12px 20px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s ease;
    color: white;
}

.add-player-btn {
    background: linear-gradient(135deg, #2ed573, #26d466);
    box-shadow: 0 5px 15px rgba(46, 213, 115, 0.3);
}

.add-videos-btn {
    background: linear-gradient(135deg, #00d4ff, #0099cc);
    box-shadow: 0 5px 15px rgba(0, 212, 255, 0.3);
}

.sync-btn {
    background: linear-gradient(135deg, #ffa502, #ff7675);
    box-shadow: 0 5px 15px rgba(255, 165, 2, 0.3);
}

.pause-all-btn, .play-all-btn {
    background: linear-gradient(135deg, #6c5ce7, #a29bfe);
    box-shadow: 0 5px 15px rgba(108, 92, 231, 0.3);
}

.player-management button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.player-counter {
    text-align: center;
    color: #00d4ff;
    font-weight: bold;
    font-size: 1.1rem;
}

/* Video Players Container */
.video-players-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

/* Individual Video Player Instance */
.video-player-instance {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 15px;
    padding: 20px;
    border: 2px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.video-player-instance.active {
    border-color: #00d4ff;
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.5);
    background: rgba(0, 212, 255, 0.08);
    transform: scale(1.02);
}

.video-player-instance:hover {
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* Player Header */
.player-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.player-header h4 {
    color: #00d4ff;
    font-size: 1.2rem;
}

.player-controls {
    display: flex;
    gap: 10px;
}

.remove-player-btn, .minimize-player-btn {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    padding: 5px 10px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.remove-player-btn:hover {
    background: rgba(255, 107, 107, 0.8);
}

.minimize-player-btn:hover {
    background: rgba(255, 165, 2, 0.8);
}

/* Video Container */
.video-container {
    position: relative;
    background: #000;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 20px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5);
}

.video-element {
    width: 100%;
    height: auto;
    max-height: 300px;
    display: block;
    border-radius: 10px;
}

.video-overlay {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(0, 0, 0, 0.8);
    color: #00d4ff;
    padding: 6px 12px;
    border-radius: 15px;
    font-weight: bold;
    font-size: 1rem;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: 10;
}

.video-overlay.show {
    opacity: 1;
}

/* File Input */
.file-input-container {
    margin-bottom: 20px;
    text-align: center;
}

.file-input {
    display: none;
}

.file-input-label {
    display: inline-block;
    background: linear-gradient(135deg, #00d4ff, #0099cc);
    color: white;
    padding: 10px 20px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    box-shadow: 0 5px 15px rgba(0, 212, 255, 0.3);
}

.file-input-label:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 212, 255, 0.4);
}

/* Player Controls Section */
.player-controls-section {
    display: grid;
    gap: 20px;
}

.control-group {
    background: rgba(255, 255, 255, 0.05);
    padding: 15px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.control-group h5 {
    margin-bottom: 12px;
    color: #00d4ff;
    font-size: 1rem;
}

.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

button {
    background: linear-gradient(135deg, #333, #555);
    color: white;
    border: none;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

button:hover {
    background: linear-gradient(135deg, #555, #777);
    transform: translateY(-1px);
    box-shadow: 0 5px 12px rgba(0, 0, 0, 0.3);
}

button:active {
    transform: translateY(0);
}

/* Speed Controls */
.speed-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
}

.speed-btn {
    min-width: 45px;
    padding: 6px 10px;
    font-size: 0.8rem;
}

.speed-btn.active {
    background: linear-gradient(135deg, #00d4ff, #0099cc);
    color: white;
    box-shadow: 0 3px 10px rgba(0, 212, 255, 0.4);
}

.custom-speed {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
}

.speed-slider {
    flex: 1;
    height: 4px;
    background: #333;
    border-radius: 2px;
    outline: none;
    -webkit-appearance: none;
}

.speed-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: linear-gradient(135deg, #00d4ff, #0099cc);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 212, 255, 0.4);
}

.speed-value {
    min-width: 40px;
    font-weight: bold;
    color: #00d4ff;
    font-size: 0.95rem;
}

/* Playlist */
.playlist {
    max-height: 150px;
    overflow-y: auto;
    margin-bottom: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
}

.playlist-item {
    padding: 8px 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.playlist-item:hover {
    background: rgba(0, 212, 255, 0.1);
}

.playlist-item.active {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(0, 153, 204, 0.2));
    border-left: 3px solid #00d4ff;
}

.playlist-item .filename {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 150px;
    font-size: 0.85rem;
}

.playlist-item .duration {
    color: #b0b0b0;
    font-size: 0.8rem;
}

/* Error state styling for corrupted files */
.playlist-item .duration.error {
    color: #ff6b6b;
    font-weight: bold;
    background: rgba(255, 107, 107, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
}

.playlist-item:has(.duration.error) {
    border-left: 3px solid #ff6b6b;
    background: rgba(255, 107, 107, 0.05);
}

.playlist-item:has(.duration.error):hover {
    background: rgba(255, 107, 107, 0.1);
    cursor: not-allowed;
}

.playlist-controls {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* Video Info */
.video-info {
    background: rgba(255, 255, 255, 0.05);
    padding: 12px;
    border-radius: 8px;
    text-align: left;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 15px;
}

.video-info p {
    color: #b0b0b0;
    margin: 3px 0;
    font-size: 0.85rem;
}

.video-info .highlight {
    color: #00d4ff;
    font-weight: bold;
}

/* Global Controls */
.global-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.global-controls .control-group {
    background: rgba(255, 255, 255, 0.05);
    padding: 25px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.global-controls .control-group h3 {
    margin-bottom: 20px;
    color: #00d4ff;
    font-size: 1.3rem;
}

/* Global Speed Controls */
.global-speed-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 15px;
}

.global-speed-btn {
    min-width: 55px;
    padding: 8px 12px;
    font-size: 0.9rem;
}

.global-speed-btn.active {
    background: linear-gradient(135deg, #00d4ff, #0099cc);
    color: white;
    box-shadow: 0 5px 15px rgba(0, 212, 255, 0.4);
}

.global-custom-speed {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-top: 15px;
}

#globalSpeedSlider {
    flex: 1;
    height: 6px;
    background: #333;
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

#globalSpeedSlider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: linear-gradient(135deg, #00d4ff, #0099cc);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 4px 8px rgba(0, 212, 255, 0.4);
}

#globalSpeedValue {
    min-width: 50px;
    font-weight: bold;
    color: #00d4ff;
    font-size: 1.1rem;
}

#applyGlobalSpeedBtn {
    background: linear-gradient(135deg, #2ed573, #26d466);
    color: white;
    padding: 8px 15px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

#applyGlobalSpeedBtn:hover {
    transform: translateY(-1px);
    box-shadow: 0 5px 15px rgba(46, 213, 115, 0.4);
}

/* Master Playlist */
.master-playlist {
    max-height: 200px;
    overflow-y: auto;
    margin-bottom: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
}

.master-playlist-item {
    padding: 10px 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.master-playlist-item:hover {
    background: rgba(0, 212, 255, 0.1);
}

.master-playlist-item .filename {
    font-weight: 500;
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-right: 10px;
}

.master-playlist-item .player-id {
    background: rgba(0, 212, 255, 0.3);
    color: white;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.8rem;
    margin-right: 10px;
}

.master-playlist-item .file-size {
    color: #b0b0b0;
    font-size: 0.85rem;
}

.playlist-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* Keyboard Shortcuts */
.keyboard-shortcuts {
    background: rgba(255, 255, 255, 0.05);
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.keyboard-shortcuts h3 {
    margin-bottom: 20px;
    color: #00d4ff;
    font-size: 1.3rem;
}

.shortcuts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
}

.shortcuts-grid span {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

kbd {
    background: #333;
    color: #fff;
    padding: 3px 6px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.8rem;
    border: 1px solid #555;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

/* Performance Info */
.performance-info {
    background: rgba(255, 255, 255, 0.05);
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 20px;
}

.performance-info h3 {
    margin-bottom: 15px;
    color: #00d4ff;
    font-size: 1.2rem;
}

.performance-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
}

.performance-stats span {
    background: rgba(255, 255, 255, 0.05);
    padding: 10px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
}

.performance-stats span span {
    color: #00d4ff;
    font-weight: bold;
    background: none;
    padding: 0;
    border: none;
}

/* Enhanced Animations */
@keyframes speedPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.03); }
    100% { transform: scale(1); }
}

.speed-change-animation {
    animation: speedPulse 0.3s ease;
}

@keyframes playerActivate {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

.video-player-instance.active {
    animation: playerActivate 0.5s ease;
}

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

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #00d4ff, #0099cc);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #0099cc, #007aa3);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .video-players-container {
        grid-template-columns: 1fr;
    }
    
    .global-controls {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .management-controls {
        flex-direction: column;
        align-items: center;
    }
    
    .shortcuts-grid {
        grid-template-columns: 1fr;
    }
    
    .performance-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .playlist-item .filename {
        max-width: 120px;
    }
    
    .master-playlist-item .filename {
        max-width: 150px;
    }

    .video-element {
        max-height: 250px;
    }
}

@media (max-width: 480px) {
    .video-players-container {
        grid-template-columns: 1fr;
    }
    
    .performance-stats {
        grid-template-columns: 1fr;
    }
    
    .speed-controls, .global-speed-controls {
        justify-content: center;
    }
}