/* ===== VARIABLES Y RESET ===== */
        :root {
            --amarillo-primario: #FFD700;
            --amarillo-hover: #FFC700;
            --negro-fondo: #0a0a0a;
            --negro-sidebar: #1a1a1a;
            --negro-card: #1f1f1f;
            --verde-activo: #1DB954;
            --verde-hover: #1ed760;
            --gris-texto: #b3b3b3;
            --gris-oscuro: #282828;
            --blanco: #ffffff;
            --rojo-error: #ff4444;
        }

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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: var(--negro-fondo);
            color: var(--blanco);
            overflow-x: hidden;
        }

        /* ===== LAYOUT PRINCIPAL ===== */
        .app-container {
            display: grid;
            grid-template-columns: 240px 1fr;
            grid-template-rows: 1fr 100px;
            height: 100vh;
            grid-template-areas: 
                "sidebar content"
                "player player";
        }

        /* ===== SIDEBAR ===== */
        .sidebar {
            grid-area: sidebar;
            background: var(--negro-sidebar);
            padding: 24px 12px;
            display: flex;
            flex-direction: column;
            gap: 24px;
            overflow-y: auto;
            position: fixed;
            width: 240px;
            height: calc(100vh - 100px);
            z-index: 100;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 0 12px;
            margin-bottom: 12px;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--amarillo-primario), var(--verde-activo));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
        }

        .logo-text {
            font-size: 22px;
            font-weight: bold;
            background: linear-gradient(135deg, var(--amarillo-primario), var(--verde-activo));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .nav-section {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 12px 16px;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.3s ease;
            color: var(--gris-texto);
            font-size: 14px;
            font-weight: 500;
        }

        .nav-item:hover {
            background: var(--gris-oscuro);
            color: var(--blanco);
        }

        .nav-item.active {
            background: var(--gris-oscuro);
            color: var(--amarillo-primario);
        }

        .nav-icon {
            font-size: 20px;
            min-width: 20px;
        }

        .divider {
            height: 1px;
            background: var(--gris-oscuro);
            margin: 8px 0;
        }

        /* ===== ÁREA DE CONTENIDO ===== */
        .content {
            grid-area: content;
            overflow-y: auto;
            padding: 24px 32px 120px 32px;
            margin-left: 240px;
        }

        /* ===== HEADER DE BÚSQUEDA ===== */
        .search-header {
            position: sticky;
            top: 0;
            background: var(--negro-fondo);
            z-index: 50;
            padding-bottom: 24px;
        }

        .search-container {
            display: flex;
            gap: 16px;
            align-items: center;
            margin-bottom: 24px;
        }

        .search-box {
            flex: 1;
            position: relative;
        }

        .search-input {
            width: 100%;
            padding: 12px 48px 12px 48px;
            background: var(--negro-card);
            border: 2px solid transparent;
            border-radius: 24px;
            color: var(--blanco);
            font-size: 14px;
            transition: all 0.3s ease;
        }

        .search-input:focus {
            outline: none;
            border-color: var(--amarillo-primario);
            background: var(--gris-oscuro);
        }

        .search-icon {
            position: absolute;
            left: 18px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--gris-texto);
            font-size: 18px;
        }

        .search-clear {
            position: absolute;
            right: 18px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--gris-texto);
            cursor: pointer;
            display: none;
            font-size: 18px;
        }

        .search-clear:hover {
            color: var(--blanco);
        }

        /* ===== GÉNEROS ===== */
        .genre-section {
            margin-bottom: 32px;
        }

        .section-title {
            font-size: 24px;
            font-weight: bold;
            margin-bottom: 16px;
            color: var(--blanco);
        }

        .genre-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
            gap: 12px;
        }

        .genre-btn {
            background: var(--negro-card);
            border: 2px solid transparent;
            padding: 16px;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            color: var(--gris-texto);
        }

        .genre-btn:hover {
            background: var(--gris-oscuro);
            border-color: var(--amarillo-primario);
            transform: translateY(-2px);
        }

        .genre-btn.active {
            background: var(--amarillo-primario);
            color: var(--negro-fondo);
            border-color: var(--amarillo-primario);
        }

        .genre-icon {
            font-size: 32px;
        }

        .genre-name {
            font-size: 13px;
            font-weight: 600;
        }

        /* ===== RESULTADOS DE MÚSICA ===== */
        .results-section {
            margin-top: 32px;
        }

        .status-message {
            padding: 16px;
            background: var(--gris-oscuro);
            border-radius: 8px;
            text-align: center;
            color: var(--gris-texto);
            margin-bottom: 24px;
        }

        .results-grid {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        /* ===== CARD DE CANCIÓN (Horizontal estilo SoundCloud) ===== */
        .song-card {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--negro-card);
            border-radius: 8px;
            padding: 12px;
            transition: all 0.3s ease;
            border: 2px solid transparent;
        }

        .song-card:hover {
            background: var(--gris-oscuro);
            transform: translateX(4px);
        }

        .song-card.playing {
            border-color: var(--verde-activo);
            background: var(--gris-oscuro);
        }

        .song-artwork {
            width: 80px;
            height: 80px;
            min-width: 80px;
            border-radius: 6px;
            object-fit: cover;
            background: var(--gris-oscuro);
        }

        .song-info {
            flex: 1;
            min-width: 0;
        }

        .song-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--blanco);
            margin-bottom: 4px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .song-artist {
            font-size: 13px;
            color: var(--gris-texto);
            margin-bottom: 4px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .song-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--gris-texto);
        }

        .song-duration {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .song-source {
            padding: 2px 8px;
            background: var(--gris-oscuro);
            border-radius: 12px;
            font-size: 11px;
        }

        /* ===== ACCIONES DE CANCIÓN ===== */
        .song-actions {
            display: flex;
            gap: 8px;
            align-items: center;
        }

        .action-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: none;
            background: transparent;
            color: var(--gris-texto);
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
        }

        .action-btn:hover {
            background: var(--negro-fondo);
            color: var(--blanco);
            transform: scale(1.1);
        }

        .action-btn.play-btn {
            background: var(--amarillo-primario);
            color: var(--negro-fondo);
        }

        .action-btn.play-btn:hover {
            background: var(--amarillo-hover);
            transform: scale(1.15);
        }

        .action-btn.favorite.active {
            color: var(--verde-activo);
        }

        .action-btn.favorite.active:hover {
            color: var(--verde-hover);
        }

        /* ===== REPRODUCTOR INFERIOR ===== */
        .player {
            grid-area: player;
            background: var(--negro-sidebar);
            border-top: 1px solid var(--gris-oscuro);
            display: flex;
            flex-direction: column;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 200;
        }

        .player-progress {
            width: 100%;
            height: 4px;
            background: var(--gris-oscuro);
            cursor: pointer;
            position: relative;
        }

        .player-progress-bar {
            height: 100%;
            background: var(--amarillo-primario);
            width: 0%;
            transition: width 0.1s linear;
        }

        .player-content {
            display: grid;
            grid-template-columns: 1fr 2fr 1fr;
            padding: 16px 24px;
            gap: 16px;
            align-items: center;
        }

        /* ===== INFO DEL REPRODUCTOR ===== */
        .player-info {
            display: flex;
            align-items: center;
            gap: 16px;
            min-width: 0;
        }

        .player-artwork {
            width: 56px;
            height: 56px;
            border-radius: 6px;
            object-fit: cover;
            background: var(--gris-oscuro);
        }

        .player-details {
            min-width: 0;
            flex: 1;
        }

        .player-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--blanco);
            margin-bottom: 4px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .player-artist {
            font-size: 12px;
            color: var(--gris-texto);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ===== CONTROLES DEL REPRODUCTOR ===== */
        .player-controls {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
        }

        .player-buttons {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .player-btn {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            border: none;
            background: transparent;
            color: var(--gris-texto);
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
        }

        .player-btn:hover {
            color: var(--blanco);
            transform: scale(1.1);
        }

        .player-btn.active {
            color: var(--verde-activo);
        }

        .player-btn.play-pause {
            width: 40px;
            height: 40px;
            background: var(--blanco);
            color: var(--negro-fondo);
            font-size: 20px;
        }

        .player-btn.play-pause:hover {
            background: var(--amarillo-primario);
            transform: scale(1.15);
        }

        .player-time {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            color: var(--gris-texto);
            width: 100%;
            max-width: 400px;
        }

        /* ===== CONTROLES DE VOLUMEN ===== */
        .player-volume {
            display: flex;
            align-items: center;
            gap: 12px;
            justify-content: flex-end;
        }

        .volume-icon {
            color: var(--gris-texto);
            font-size: 20px;
            cursor: pointer;
        }

        .volume-icon:hover {
            color: var(--blanco);
        }

        .volume-slider {
            width: 100px;
            height: 4px;
            -webkit-appearance: none;
            appearance: none;
            background: var(--gris-oscuro);
            border-radius: 2px;
            outline: none;
        }

        .volume-slider::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 12px;
            height: 12px;
            background: var(--blanco);
            border-radius: 50%;
            cursor: pointer;
        }

        .volume-slider::-moz-range-thumb {
            width: 12px;
            height: 12px;
            background: var(--blanco);
            border-radius: 50%;
            cursor: pointer;
            border: none;
        }

        /* ===== TOAST NOTIFICATIONS ===== */
        .toast-container {
            position: fixed;
            top: 24px;
            right: 24px;
            z-index: 1000;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .toast {
            min-width: 300px;
            padding: 16px 20px;
            background: var(--negro-card);
            border-radius: 8px;
            display: flex;
            align-items: center;
            gap: 12px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
            animation: slideIn 0.3s ease;
        }

        @keyframes slideIn {
            from {
                transform: translateX(400px);
                opacity: 0;
            }
            to {
                transform: translateX(0);
                opacity: 1;
            }
        }

        .toast.success {
            border-left: 4px solid var(--verde-activo);
        }

        .toast.error {
            border-left: 4px solid var(--rojo-error);
        }

        .toast.info {
            border-left: 4px solid var(--amarillo-primario);
        }

        .toast-icon {
            font-size: 24px;
        }

        .toast.success .toast-icon {
            color: var(--verde-activo);
        }

        .toast.error .toast-icon {
            color: var(--rojo-error);
        }

        .toast.info .toast-icon {
            color: var(--amarillo-primario);
        }

        .toast-message {
            flex: 1;
            font-size: 14px;
        }

        /* ===== MODAL ===== */
        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.8);
            display: none;
            align-items: center;
            justify-content: center;
            z-index: 500;
            animation: fadeIn 0.3s ease;
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        .modal-overlay.active {
            display: flex;
        }

        .modal {
            background: var(--negro-sidebar);
            border-radius: 12px;
            padding: 32px;
            max-width: 500px;
            width: 90%;
            max-height: 80vh;
            overflow-y: auto;
            position: relative;
            animation: modalSlideIn 0.3s ease;
        }

        @keyframes modalSlideIn {
            from {
                transform: translateY(-50px);
                opacity: 0;
            }
            to {
                transform: translateY(0);
                opacity: 1;
            }
        }

        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 24px;
        }

        .modal-title {
            font-size: 24px;
            font-weight: bold;
        }

        .modal-close {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            border: none;
            background: var(--gris-oscuro);
            color: var(--gris-texto);
            cursor: pointer;
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }

        .modal-close:hover {
            background: var(--negro-fondo);
            color: var(--blanco);
        }

        .modal-body {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .share-option {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px;
            background: var(--negro-card);
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .share-option:hover {
            background: var(--gris-oscuro);
            transform: translateX(4px);
        }

        .share-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--gris-oscuro);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--amarillo-primario);
        }

        .share-info {
            flex: 1;
        }

        .share-label {
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .share-description {
            font-size: 12px;
            color: var(--gris-texto);
        }

        .share-url {
            padding: 12px;
            background: var(--negro-fondo);
            border-radius: 6px;
            font-size: 12px;
            color: var(--gris-texto);
            word-break: break-all;
            font-family: monospace;
        }

        /* ===== PLAYLISTS ===== */
        .playlist-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .playlist-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px;
            background: var(--negro-card);
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .playlist-item:hover {
            background: var(--gris-oscuro);
            transform: translateX(4px);
        }

        .playlist-cover {
            width: 80px;
            height: 80px;
            border-radius: 6px;
            background: linear-gradient(135deg, var(--gris-oscuro), var(--negro-card));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            color: var(--amarillo-primario);
        }

        .playlist-info {
            flex: 1;
        }

        .playlist-name {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .playlist-count {
            font-size: 13px;
            color: var(--gris-texto);
        }

        .create-playlist-btn {
            width: 100%;
            padding: 16px;
            background: var(--amarillo-primario);
            color: var(--negro-fondo);
            border: none;
            border-radius: 24px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-bottom: 24px;
        }

        .create-playlist-btn:hover {
            background: var(--amarillo-hover);
            transform: translateY(-2px);
        }

        .playlist-input {
            width: 100%;
            padding: 12px;
            background: var(--negro-card);
            border: 2px solid var(--gris-oscuro);
            border-radius: 8px;
            color: var(--blanco);
            font-size: 14px;
        }

        .playlist-input:focus {
            outline: none;
            border-color: var(--amarillo-primario);
        }

        /* ===== LOADER ===== */
        .loader {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid var(--gris-oscuro);
            border-top-color: var(--amarillo-primario);
            border-radius: 50%;
            animation: spin 0.8s linear infinite;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 1024px) {
            .app-container {
                grid-template-columns: 200px 1fr;
            }

            .sidebar {
                width: 200px;
            }

            .content {
                margin-left: 200px;
                padding: 16px 24px 120px 24px;
            }

            .genre-grid {
                grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
            }
        }

        @media (max-width: 768px) {
            .app-container {
                grid-template-columns: 1fr;
            }

            .sidebar {
                position: fixed;
                left: -240px;
                transition: left 0.3s ease;
            }

            .sidebar.mobile-open {
                left: 0;
            }

            .content {
                margin-left: 0;
                padding: 16px 16px 120px 16px;
            }

            .player-content {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .player-volume {
                display: none;
            }

            .song-card {
                flex-direction: column;
                align-items: flex-start;
            }

            .song-artwork {
                width: 100%;
                height: 200px;
            }

            .genre-grid {
                grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
            }
        }

        /* ===== EMPTY STATE ===== */
        .empty-state {
            text-align: center;
            padding: 48px 24px;
            color: var(--gris-texto);
        }

        .empty-icon {
            font-size: 64px;
            margin-bottom: 16px;
            opacity: 0.5;
        }

        .empty-title {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--blanco);
        }

        .empty-message {
            font-size: 14px;
        }

        /* ===== SCROLLBAR ===== */
        ::-webkit-scrollbar {
            width: 12px;
        }

        ::-webkit-scrollbar-track {
            background: var(--negro-fondo);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--gris-oscuro);
            border-radius: 6px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--gris-texto);
        }