:root {
    --primary-color: #1DB954;
    --dark-color: #121212;
    --darker-color: #0a0a0a;
    --light-color: #ffffff;
    --gray-color: #b3b3b3;
    --sidebar-width: 220px;
    --player-height: 90px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--dark-color);
    color: var(--light-color);
}

.app-container {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    grid-template-rows: 1fr var(--player-height);
    grid-template-areas:
        "sidebar main"
        "player player";
    height: 100vh;
}

/* Sidebar */
.sidebar {
    grid-area: sidebar;
    background-color: var(--darker-color);
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    margin-bottom: 30px;
}

.logo i {
    font-size: 32px;
    color: var(--primary-color);
    margin-right: 10px;
}

.logo h2 {
    font-size: 20px;
    font-weight: 700;
}

.sidebar nav ul {
    list-style: none;
}

.sidebar nav li {
    margin-bottom: 10px;
}

.nav-link {
    display: flex;
    align-items: center;
    color: var(--gray-color);
    text-decoration: none;
    padding: 10px;
    border-radius: 4px;
    transition: all 0.2s;
}

.nav-link i {
    margin-right: 10px;
    font-size: 16px;
}

.nav-link:hover, .nav-link.active {
    color: var(--light-color);
    background-color: rgba(255, 255, 255, 0.1);
}

.user-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px;
    gap: 10px;
}

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: #333;
    display: flex;
    overflow: hidden;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    align-items: center;
    justify-content: center;
    margin-right: 10px;
}

.user-name {
    font-size: 14px;
    font-weight: 600;
}

.login-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 20px;
    padding: 8px 15px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.2s ease;
    margin-top: 5px;
}

.login-btn:hover {
    transform: scale(1.05);
    background-color: #1ed760;
}

/* Main Content */
.main-content {
    grid-area: main;
    overflow-y: auto;
    padding: 30px;
}

/* Player Footer */
.player-footer {
    grid-area: player;
    background-color: var(--darker-color);
    border-top: 1px solid #282828;
    height: var(--player-height);
}

/* View Containers */
.view-container {
    max-width: 1200px;
    margin: 0 auto;
}

.view-container h1 {
    margin-bottom: 20px;
    font-size: 28px;
    font-weight: 700;
}

/* Home page */
.home-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.feature-card {
    background-color: #282828;
    border-radius: 8px;
    padding: 20px;
    transition: background-color 0.3s;
    cursor: pointer;
}

.feature-card:hover {
    background-color: #333;
}

.feature-card i {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.feature-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--gray-color);
    font-size: 14px;
}

/* Search page */
.search-container {
    margin-bottom: 30px;
    position: relative;
}

.input-group {
    position: relative;
}

#search-input {
    width: 100%;
    padding: 12px 50px 12px 20px;
    border-radius: 30px;
    background-color: #282828;
    border: none;
    color: var(--light-color);
    font-size: 16px;
    outline: none;
    transition: background-color 0.3s;
}

#search-input:focus {
    background-color: #333;
}

.search-btn {
    position: absolute;
    right: 5px;
    top: 5px;
    background-color: var(--primary-color);
    border: none;
    border-radius: 50%;
    width: 35px;
    height: 35px;
    color: var(--light-color);
    font-size: 16px;
    cursor: pointer;
    transition: transform 0.2s;
}

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

.suggestions {
    display: none;
    position: absolute;
    width: 100%;
    background-color: #282828;
    border-radius: 8px;
    margin-top: 5px;
    max-height: 200px;
    overflow-y: auto;
    z-index: 10;
}

.suggestion {
    padding: 10px 15px;
    cursor: pointer;
}

.suggestion:hover {
    background-color: #333;
}

/* Search Results */
.tracks-grid, .artists-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.track-card, .artist-card {
    background-color: #282828;
    border-radius: 8px;
    padding: 15px;
    transition: background-color 0.3s;
    cursor: pointer;
    position: relative;
}

.track-card:hover, .artist-card:hover {
    background-color: #333;
}

.track-cover, .artist-image {
    width: 100%;
    height: 180px;
    border-radius: 4px;
    margin-bottom: 15px;
    background-size: cover;
    background-position: center;
}

.artist-image {
    border-radius: 50%;
    height: 160px;
    width: 160px;
    margin: 0 auto 15px;
}

.track-info h3, .artist-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-info p, .artist-card p {
    color: var(--gray-color);
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.play-btn {
    position: absolute;
    top: 140px;
    right: 30px;
    background-color: var(--primary-color);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    color: var(--light-color);
    font-size: 16px;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.track-card:hover .play-btn {
    opacity: 1;
    transform: translateY(0);
}

/* Notificaciones */
.notification {
    position: fixed;
    bottom: 100px;
    right: 20px;
    background-color: var(--primary-color);
    color: var(--light-color);
    padding: 10px 20px;
    border-radius: 4px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    transform: translateX(100%);
    transition: transform 0.3s;
    z-index: 1000;
}

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

.notification.error {
    background-color: #e74c3c;
}

.notification.success {
    background-color: var(--primary-color);
}

/* Loader */
.loader {
    text-align: center;
    margin: 30px 0;
    color: var(--gray-color);
}

/* Responsive */
@media screen and (max-width: 768px) {
    :root {
        --sidebar-width: 80px;
    }
    
    .logo h2, .user-name {
        display: none;
    }
    
    .nav-link span {
        display: none;
    }
    
    .sidebar nav li {
        text-align: center;
    }
    
    .nav-link i {
        margin-right: 0;
        font-size: 20px;
    }
    
    .track-cover, .artist-image {
        height: 120px;
    }
    
    .play-btn {
        top: 80px;
    }
}