:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-card: #f8f9fa;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #999999;
    --border-color: #e0e0e0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --shadow-color-hover: rgba(0, 0, 0, 0.15);
    --transition-speed: 0.3s;
    --border-radius: 15px;
    --player-gradient: linear-gradient(135deg, #f8f9fa, #e9ecef);
}

/* Dark Mode */
[data-theme="dark"] {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-card: #1a1a2e;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-light: #888888;
    --border-color: #2a2a4a;
    --shadow-color: rgba(0, 0, 0, 0.4);
    --shadow-color-hover: rgba(0, 0, 0, 0.6);
    --player-gradient: linear-gradient(135deg, #1a1a2e, #16213e);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--primary-gradient);
    min-height: 100vh;
    padding: 20px;
    transition: background var(--transition-speed);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: var(--bg-secondary);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 20px 60px var(--shadow-color);
    transition: all var(--transition-speed);
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

.header-content h1 {
    color: var(--text-primary);
    font-size: 2.5rem;
    margin-bottom: 5px;
}

.header-content h1 i {
    color: #764ba2;
    margin-right: 10px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

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

.header-actions button {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    color: var(--text-primary);
    transition: all var(--transition-speed);
}

.header-actions button:hover {
    transform: scale(1.1);
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
}

/* Search Section */
.search-section {
    margin-bottom: 30px;
}

.search-box {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.search-box input {
    flex: 1;
    padding: 12px 20px;
    border: 2px solid var(--border-color);
    border-radius: 25px;
    font-size: 1rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all var(--transition-speed);
}

.search-box input:focus {
    border-color: #764ba2;
    outline: none;
    box-shadow: 0 0 10px rgba(118, 75, 162, 0.2);
}

.search-box button {
    padding: 12px 30px;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.search-box button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(118, 75, 162, 0.4);
}

.search-options {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.option-btn {
    padding: 8px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    cursor: pointer;
    transition: all var(--transition-speed);
    color: var(--text-secondary);
}

.option-btn.active {
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
}

.option-btn:hover {
    transform: scale(1.05);
}

/* Results Section */
.results-section {
    margin-bottom: 30px;
    display: none;
}

.results-section.active {
    display: block;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

.results-header h3 {
    color: var(--text-primary);
}

#resultCount {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 15px;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 5px;
}

.result-item {
    background: var(--bg-card);
    border-radius: 10px;
    padding: 15px;
    cursor: pointer;
    transition: all var(--transition-speed);
    display: flex;
    align-items: center;
    gap: 15px;
    animation: slideIn 0.3s ease-out;
}

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

.result-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px var(--shadow-color-hover);
    background: var(--bg-secondary);
}

.result-item img {
    width: 60px;
    height: 60px;
    border-radius: 8px;
    object-fit: cover;
}

.result-item .info {
    flex: 1;
}

.result-item .info h4 {
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 5px;
}

.result-item .info p {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.result-item .actions {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.result-item .actions button {
    padding: 5px 12px;
    border: none;
    border-radius: 15px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all var(--transition-speed);
}

.result-item .actions .play-now {
    background: #764ba2;
    color: white;
}

.result-item .actions .add-queue {
    background: var(--border-color);
    color: var(--text-secondary);
}

.result-item .actions button:hover {
    transform: scale(1.05);
}

/* Player Section */
.player-section {
    margin-bottom: 30px;
}

.player-container {
    background: var(--player-gradient);
    border-radius: var(--border-radius);
    padding: 20px;
    transition: all var(--transition-speed);
}

.player-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.song-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.song-info img {
    width: 60px;
    height: 60px;
    border-radius: 10px;
    object-fit: cover;
}

.song-details h3 {
    color: var(--text-primary);
    font-size: 1.1rem;
}

.song-details p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.favorite-btn button {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
    transition: all var(--transition-speed);
}

.favorite-btn button.active {
    color: #ff4757;
}

.favorite-btn button:hover {
    transform: scale(1.2);
}

.player-controls {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.progress-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.progress-container span {
    color: var(--text-secondary);
    font-size: 0.9rem;
    min-width: 40px;
}

.progress-bar {
    flex: 1;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    cursor: pointer;
    position: relative;
}

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

.progress-hover {
    position: absolute;
    top: -5px;
    height: 16px;
    width: 0;
    background: rgba(118, 75, 162, 0.1);
    border-radius: 3px;
    pointer-events: none;
}

.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
}

.controls button {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text-primary);
    transition: all var(--transition-speed);
    padding: 8px;
    border-radius: 50%;
}

.controls button:hover {
    background: rgba(118, 75, 162, 0.1);
    transform: scale(1.1);
}

.controls .play-btn {
    width: 50px;
    height: 50px;
    background: var(--primary-gradient);
    color: white;
    border-radius: 50%;
    font-size: 1.5rem;
}

.controls .play-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 5px 20px rgba(118, 75, 162, 0.4);
}

.controls .active {
    color: #764ba2;
}

.volume-control {
    display: flex;
    align-items: center;
    gap: 10px;
}

.volume-control i {
    color: var(--text-secondary);
}

.volume-control input[type="range"] {
    width: 100px;
    height: 4px;
    -webkit-appearance: none;
    background: var(--border-color);
    border-radius: 2px;
    outline: none;
}

.volume-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: #764ba2;
    cursor: pointer;
}

.volume-control input[type="range"]::-moz-range-thumb {
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: #764ba2;
    cursor: pointer;
    border: none;
}

#volumePercent {
    color: var(--text-secondary);
    font-size: 0.8rem;
    min-width: 35px;
}

/* Playlist Section */
.playlist-section {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 20px;
    transition: all var(--transition-speed);
}

.playlist-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    flex-wrap: wrap;
    gap: 10px;
}

.playlist-header h3 {
    color: var(--text-primary);
}

.playlist-header h3 span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

.playlist-actions button {
    padding: 8px 15px;
    border: none;
    border-radius: 15px;
    cursor: pointer;
    transition: all var(--transition-speed);
    display: flex;
    align-items: center;
    gap: 5px;
}

.playlist-actions button:hover {
    transform: scale(1.05);
}

.playlist-actions button:first-child {
    background: var(--border-color);
    color: var(--text-primary);
}

.playlist-actions button:nth-child(2) {
    background: #ff4757;
    color: white;
}

.playlist-actions button:last-child {
    background: #2ed573;
    color: white;
}

.playlist-container {
    max-height: 300px;
    overflow-y: auto;
}

.empty-playlist {
    text-align: center;
    padding: 40px;
    color: var(--text-light);
}

.empty-playlist i {
    font-size: 3rem;
    margin-bottom: 10px;
}

.empty-playlist .empty-sub {
    font-size: 0.9rem;
}

.playlist-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    background: var(--bg-secondary);
    border-radius: 8px;
    margin-bottom: 8px;
    transition: all var(--transition-speed);
    cursor: pointer;
}

.playlist-item:hover {
    background: var(--bg-card);
    transform: translateX(5px);
}

.playlist-item.active {
    background: var(--primary-gradient);
    color: white;
}

.playlist-item .info {
    display: flex;
    align-items: center;
    gap: 15px;
    flex: 1;
    min-width: 0;
}

.playlist-item .info img {
    width: 40px;
    height: 40px;
    border-radius: 5px;
    object-fit: cover;
}

.playlist-item .info .details {
    flex: 1;
    min-width: 0;
}

.playlist-item .info .details h4 {
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.playlist-item .info .details p {
    font-size: 0.8rem;
    opacity: 0.7;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

.playlist-item .actions button {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-speed);
}

.playlist-item .actions button:hover {
    color: #ff4757;
    transform: scale(1.1);
}

.playlist-item.active .actions button {
    color: white;
}

/* Notification */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--bg-secondary);
    padding: 15px 20px;
    border-radius: 10px;
    box-shadow: 0 10px 30px var(--shadow-color);
    transform: translateX(120%);
    transition: transform 0.3s ease;
    z-index: 1000;
    border-left: 4px solid #2ed573;
}

.notification.show {
    transform: translateX(0);
}

.notification-content {
    display: flex;
    align-items: center;
    gap: 10px;
}

.notification-content i {
    color: #2ed573;
    font-size: 1.2rem;
}

.notification-content span {
    color: var(--text-primary);
}

/* Loading Spinner */
.loading {
    text-align: center;
    padding: 20px;
}

.loading i {
    font-size: 2rem;
    color: #764ba2;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-card);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-gradient);
    border-radius: 10px;
}

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

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header-content h1 {
        font-size: 1.8rem;
    }
    
    .search-box {
        flex-direction: column;
    }
    
    .results-grid {
        grid-template-columns: 1fr;
    }
    
    .controls {
        gap: 10px;
        flex-wrap: wrap;
    }
    
    .controls button {
        font-size: 1rem;
        padding: 6px;
    }
    
    .controls .play-btn {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
    
    .volume-control input[type="range"] {
        width: 60px;
    }
    
    .player-header {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }
    
    .playlist-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .playlist-actions {
        justify-content: stretch;
    }
    
    .playlist-actions button {
        flex: 1;
        justify-content: center;
    }
    
    .notification {
        top: 10px;
        right: 10px;
        left: 10px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
        border-radius: 10px;
    }
    
    .header-content h1 {
        font-size: 1.4rem;
    }
    
    .result-item {
        padding: 10px;
    }
    
    .result-item img {
        width: 40px;
        height: 40px;
    }
    
    .playlist-item {
        padding: 8px 10px;
    }
    
    .playlist-item .info img {
        width: 30px;
        height: 30px;
    }
}