:root {
    --primary: #7c3aed;
    --primary-dark: #0077b6;
    --black: #121212;
    --dark-gray: #1e1e1e;
    --medium-gray: #2d2d2d;
    --light-gray: #3d3d3d;
    --text-light: #f0f0f0;
    --text-dark: #333333;
    --white: #ffffff;
    --success: #2ecc71;
    --warning: #f39c12;
    --danger: #e74c3c;
}

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

body {
    font-family: 'Montserrat', sans-serif;
    background-color: var(--black);
    color: var(--text-light);
    line-height: 1.6;
    transition: all 0.3s ease;
}

.app-container {
    display: flex;
    min-height: 100vh;
    position: relative;
}

.sidebar {
    width: 280px;
    background-color: var(--dark-gray);
    border-right: 1px solid var(--medium-gray);
    height: 100vh;
    position: fixed;
    transition: all 0.3s ease;
    transform: translateX(-100%);
    z-index: 100;
display: flex;
flex-direction: column;
}

.sidebar.active {
    transform: translateX(0);
    box-shadow: 5px 0 15px rgba(0,0,0,0.3);
}

.sidebar-header {
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--medium-gray);
}

.logo img {
    max-width: 180px;
    height: auto;
}

.no-context-menu {
    -webkit-user-select: none;
    user-select: none;
    -webkit-user-drag: none;
    pointer-events: none;
}

.close-menu {
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.close-menu:hover {
    color: var(--primary);
    transform: rotate(90deg);
}

.sidebar-content {
    padding: 20px;
    overflow-y: auto;
flex: 1;
min-height: 0;
}

.menu-section {
    margin-bottom: 30px;
}

.menu-title {
    font-size: 0.9rem;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 15px;
    letter-spacing: 1px;
}

.menu-list {
    list-style: none;
}

.menu-list li {
    margin-bottom: 5px;
    position: relative;
}

.menu-list a {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    color: var(--text-light);
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}

.menu-list a:hover {
    background-color: var(--medium-gray);
    color: var(--primary);
}

.menu-list a i {
    margin-right: 10px;
    width: 20px;
    text-align: center;
    font-size: 1rem;
}

.main-content {
    flex: 1;
    margin-left: 0;
    padding: 20px;
    transition: all 0.3s ease;
}

.main-header {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    background-color: var(--dark-gray);
    border-radius: 10px;
    margin-bottom: 20px;
}

.menu-toggle {
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 1.5rem;
    margin-right: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.menu-toggle:hover {
    color: var(--primary);
}

.header-title h1 {
    font-size: 1.8rem;
    margin-bottom: 5px;
    background: linear-gradient(90deg, var(--primary), var(--primary-dark));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.header-title p {
    font-size: 0.9rem;
    color: var(--text-light);
    opacity: 0.7;
}

.theme-selector {
    display: flex;
    margin-left: auto;
    gap: 8px;
}

.theme-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background-color: var(--medium-gray);
    color: var(--text-light);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.theme-btn:hover {
    transform: scale(1.1);
}

.theme-btn.active {
    box-shadow: 0 0 0 2px var(--primary);
}

.player-section {
    margin-bottom: 30px;
}

.music-card {
    display: flex;
    background-color: var(--dark-gray);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
}

.music-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,168,255,0.2);
}

.music-cover {
    width: 120px;
    height: 120px;
    position: relative;
    flex-shrink: 0;
}

.music-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.music-info {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.music-controls {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 10px;
}

.music-controls button {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary);
    color: white;
    border: none;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.music-controls button:hover {
    transform: scale(1.1);
}

.music-info h3 {
    font-size: 1.2rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin: 0;
}

.music-artist {
    font-size: 0.9rem;
    color: var(--primary);
    margin-bottom: 15px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.music-progress {
    width: 100%;
}

.music-progress input[type="range"] {
    width: 100%;
    height: 4px;
    border-radius: 2px;
    background: var(--medium-gray);
    outline: none;
    -webkit-appearance: none;
}

.music-progress input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.music-time {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-light);
    opacity: 0.7;
    margin-top: 5px;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.metric-card {
    background-color: var(--dark-gray);
    border-radius: 10px;
    padding: 20px;
    transition: all 0.3s ease;
    border-left: 4px solid var(--primary);
}

.metric-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
}

.metric-header {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.metric-header i {
    width: 40px;
    height: 40px;
    background-color: rgba(0,168,255,0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    margin-right: 15px;
    font-size: 1.2rem;
}

.metric-header h3 {
    font-size: 1rem;
    font-weight: 500;
}

.metric-value {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.metric-description {
    font-size: 0.9rem;
    color: var(--text-light);
    opacity: 0.7;
}

.system-info {
    background-color: var(--dark-gray);
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 30px;
}

.system-info h2 {
    display: flex;
    align-items: center;
    font-size: 1.3rem;
    margin-bottom: 20px;
}

.system-info h2 i {
    margin-right: 10px;
    color: var(--primary);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.info-item {
    margin-bottom: 15px;
}

.info-item label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-light);
    opacity: 0.7;
    margin-bottom: 5px;
}

.info-item span {
    font-size: 1.1rem;
    font-weight: 600;
    word-break: break-all;
}

.main-footer {
    text-align: center;
    padding: 20px;
    color: var(--text-light);
    opacity: 0.7;
    font-size: 0.9rem;
    border-top: 1px solid var(--medium-gray);
}

body.light-mode {
    --black: #f8f9fa;
    --dark-gray: #ffffff;
    --medium-gray: #e0e0e0;
    --light-gray: #d0d0d0;
    --text-light: #333333;
    --text-dark: #121212;
    background-color: var(--black);
    color: var(--text-light);
}

body.light-mode .sidebar,
body.light-mode .main-header,
body.light-mode .music-card,
body.light-mode .metric-card,
body.light-mode .system-info {
    background-color: var(--dark-gray);
    border-color: var(--medium-gray);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

body.light-mode .menu-list a,
body.light-mode .metric-description,
body.light-mode .info-item label,
body.light-mode .main-footer {
    color: var(--text-light);
    opacity: 0.8;
}

body.light-mode .menu-list a:hover,
body.light-mode .metric-card:hover {
    background-color: var(--light-gray);
}

body.light-mode .header-title p,
body.light-mode .music-time,
body.light-mode .music-artist {
    color: var(--text-light);
    opacity: 0.7;
}

body.light-mode .theme-btn {
    background-color: var(--light-gray);
}

body.blue-mode {
    --black: #0a192f;
    --dark-gray: #172a45;
    --medium-gray: #303f60;
    --light-gray: #475f8c;
    --text-light: #e6f1ff;
    --text-dark: #a8b2d1;
    --primary: #64ffda;
    --primary-dark: #52d1b2;
    background-color: var(--black);
    color: var(--text-light);
}

body.blue-mode .sidebar,
body.blue-mode .main-header,
body.blue-mode .music-card,
body.blue-mode .metric-card,
body.blue-mode .system-info {
    background-color: var(--dark-gray);
    border-color: var(--medium-gray);
}

body.blue-mode .menu-list a,
body.blue-mode .metric-description,
body.blue-mode .info-item label,
body.blue-mode .main-footer {
    color: var(--text-dark);
}

body.blue-mode .menu-list a:hover,
body.blue-mode .metric-card:hover {
    background-color: var(--medium-gray);
}

body.blue-mode .header-title p,
body.blue-mode .music-time,
body.blue-mode .music-artist {
    color: var(--text-dark);
}

body.blue-mode .theme-btn {
    background-color: var(--medium-gray);
}

body.neutral-mode {
    --black: #f5f5f5;
    --dark-gray: #e0e0e0;
    --medium-gray: #bdbdbd;
    --light-gray: #9e9e9e;
    --text-light: #212121;
    --text-dark: #424242;
    --primary: #616161;
    --primary-dark: #424242;
    background-color: var(--black);
    color: var(--text-light);
}

body.neutral-mode .sidebar,
body.neutral-mode .main-header,
body.neutral-mode .music-card,
body.neutral-mode .metric-card,
body.neutral-mode .system-info {
    background-color: var(--dark-gray);
    border-color: var(--medium-gray);
}

body.neutral-mode .menu-list a,
body.neutral-mode .metric-description,
body.neutral-mode .info-item label,
body.neutral-mode .main-footer {
    color: var(--text-light);
}

body.neutral-mode .menu-list a:hover,
body.neutral-mode .metric-card:hover {
    background-color: var(--medium-gray);
}

body.neutral-mode .header-title p,
body.neutral-mode .music-time,
body.neutral-mode .music-artist {
    color: var(--text-dark);
}

body.neutral-mode .theme-btn {
    background-color: var(--medium-gray);
}

body.pink-mode {
    --black: #1a1a2e;
    --dark-gray: #16213e;
    --medium-gray: #0f3460;
    --light-gray: #533483;
    --text-light: #e94560;
    --text-dark: #f8a1d1;
    --primary: #e94560;
    --primary-dark: #d13354;
    background-color: var(--black);
    color: var(--text-dark);
}

body.pink-mode .sidebar,
body.pink-mode .main-header,
body.pink-mode .music-card,
body.pink-mode .metric-card,
body.pink-mode .system-info {
    background-color: var(--dark-gray);
    border-color: var(--medium-gray);
}

body.pink-mode .menu-list a,
body.pink-mode .metric-description,
body.pink-mode .info-item label,
body.pink-mode .main-footer {
    color: var(--text-dark);
}

body.pink-mode .menu-list a:hover,
body.pink-mode .metric-card:hover {
    background-color: var(--medium-gray);
}

body.pink-mode .header-title p,
body.pink-mode .music-time,
body.pink-mode .music-artist {
    color: var(--text-dark);
}

body.pink-mode .theme-btn {
    background-color: var(--medium-gray);
}

@media (max-width: 768px) {
    .metrics-grid,
    .info-grid {
        grid-template-columns: 1fr;
    }

    .music-card {
        flex-direction: column;
    }

    .music-cover {
        width: 100%;
        height: 200px;
    }

    .main-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .header-title {
        margin-bottom: 15px;
    }

    .theme-selector {
        margin-left: 0;
        width: 100%;
        justify-content: space-between;
    }
}