/* ==========================================================================
   PlayFree Design System & Main Stylesheet
   ========================================================================== */

/* Cores e Variáveis Globais */
:root {
    --bg-primary: #09090b;
    --bg-surface: rgba(18, 18, 22, 0.45);
    --bg-surface-solid: #121216;
    --bg-card: rgba(28, 28, 35, 0.4);
    --bg-card-hover: rgba(45, 45, 55, 0.6);
    
    --accent: #10b981; /* Esmeralda Premium */
    --accent-glow: rgba(16, 185, 129, 0.35);
    --accent-hover: #34d399;
    
    --text-primary: #f4f4f5;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    
    --glass-blur: blur(20px);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-quick: all 0.15s ease;
    
    --font-main: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* Reset básico */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
    user-select: none;
    -webkit-user-select: none;
}

/* Scrollbars estilizadas */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* ==========================================================================
   Background Dinâmico
   ========================================================================== */
.dynamic-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -2;
    background: radial-gradient(circle at 50% 50%, #1e1e24 0%, #09090b 100%);
    transition: background 1.5s ease;
    filter: blur(100px);
    opacity: 0.65;
}

.glass-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    background: rgba(9, 9, 11, 0.7);
    backdrop-filter: saturate(140%) blur(10px);
}

/* ==========================================================================
   Layout Principal (App Grid)
   ========================================================================== */
.app-container {
    display: grid;
    grid-template-columns: 240px 1fr 340px;
    grid-template-rows: 1fr;
    height: calc(100vh - 90px); /* Descontando a barra do player */
    width: 100vw;
    overflow: hidden;
}

/* ==========================================================================
   Sidebar Lateral
   ========================================================================== */
.sidebar {
    background: rgba(9, 9, 11, 0.4);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 24px 16px;
    backdrop-filter: var(--glass-blur);
    z-index: 10;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
    padding-left: 8px;
}

.logo-icon {
    color: var(--accent);
    filter: drop-shadow(0 0 8px var(--accent-glow));
    animation: pulseLogo 3s infinite ease-in-out;
}

@keyframes pulseLogo {
    0%, 100% { filter: drop-shadow(0 0 4px var(--accent-glow)); }
    50% { filter: drop-shadow(0 0 12px var(--accent-glow)); }
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.logo-text span {
    color: var(--accent);
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 16px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 12px 16px;
    border-radius: 10px;
    font-family: var(--font-main);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    transition: var(--transition-quick);
    width: 100%;
}

.nav-item:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-item.active {
    color: var(--accent);
    background: rgba(16, 185, 129, 0.1);
    font-weight: 600;
}

.sidebar-divider {
    height: 1px;
    background: var(--border);
    margin: 20px 0;
}

.playlists-sidebar {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    overflow: hidden;
}

.playlists-sidebar h3 {
    font-size: 12px;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 1px;
    margin-bottom: 12px;
    padding-left: 16px;
    font-weight: 600;
}

.playlists-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
    overflow-y: auto;
    flex-grow: 1;
    padding-right: 4px;
}

.playlist-item-nav {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-main);
    font-size: 14px;
    text-align: left;
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: var(--transition-quick);
}

.playlist-item-nav:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.04);
}

.btn-create-playlist {
    margin-top: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px dashed rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    color: var(--text-primary);
    padding: 10px;
    font-family: var(--font-main);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-quick);
}

.btn-create-playlist:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent);
    color: var(--accent);
}

/* ==========================================================================
   Área de Conteúdo Principal
   ========================================================================== */
.main-content {
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 24px 32px;
    position: relative;
    scroll-behavior: smooth;
}

/* Header do Topo */
.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    gap: 20px;
}

.search-bar-header {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    border-radius: 30px;
    padding: 4px 6px 4px 18px;
    width: 100%;
    max-width: 420px;
    transition: var(--transition-quick);
}

.search-bar-header:focus-within {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent);
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.15);
}

.search-bar-header input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 14px;
    flex-grow: 1;
    height: 32px;
}

.search-bar-header input::placeholder {
    color: var(--text-muted);
}

.search-btn {
    background: var(--accent);
    border: none;
    color: #09090b;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-quick);
}

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

.connection-status {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    padding: 8px 16px;
    border-radius: 20px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent);
    transition: var(--transition-quick);
}

.status-dot.yt-mode {
    background: #ff3b30;
    box-shadow: 0 0 8px #ff3b30;
}

.status-text {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

/* ==========================================================================
   Seções de Conteúdo (Home, Search, Library, Queue)
   ========================================================================== */
.tab-content {
    display: none;
    flex-direction: column;
    gap: 36px;
}

.tab-content.active {
    display: flex;
}

/* Welcome Section */
.welcome-section h1 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #ffffff 30%, #a1a1aa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.welcome-section p {
    color: var(--text-secondary);
    font-size: 16px;
    max-width: 600px;
}

/* Prateleira / Grid de Músicas */
.section-shelf {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.section-shelf h2 {
    font-size: 20px;
    font-weight: 600;
}

.music-grid, .library-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 20px;
}

.music-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 14px;
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.music-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-5px);
    border-color: var(--border-hover);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

.card-img-wrapper {
    position: relative;
    aspect-ratio: 1;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 12px;
    background: #18181b;
}

.card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.music-card:hover .card-img {
    transform: scale(1.06);
}

.card-play-btn {
    position: absolute;
    bottom: 8px;
    right: 8px;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--accent);
    color: #09090b;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: translateY(10px);
    transition: var(--transition-smooth);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
    cursor: pointer;
}

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

.card-play-btn:hover {
    background: var(--accent-hover);
    transform: scale(1.08);
}

.card-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

.card-duration {
    font-size: 11px;
    color: var(--text-muted);
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(0, 0, 0, 0.7);
    padding: 2px 6px;
    border-radius: 4px;
    backdrop-filter: blur(4px);
}

/* Resultados da Busca */
.results-list, .queue-list, .playlist-tracks-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.search-status {
    color: var(--text-muted);
    font-size: 14px;
    font-style: italic;
}

.track-row {
    display: grid;
    grid-template-columns: 48px 48px 1fr 180px 80px 80px;
    align-items: center;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 8px 16px;
    gap: 16px;
    transition: var(--transition-quick);
}

.track-row:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--border-hover);
}

.track-row-index {
    color: var(--text-muted);
    font-size: 14px;
    text-align: center;
}

.track-row-cover {
    width: 40px;
    height: 40px;
    border-radius: 6px;
    object-fit: cover;
    background: #18181b;
}

.track-row-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.track-row-title {
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-row-artist {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-row-album {
    font-size: 13px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-row-duration {
    font-size: 13px;
    color: var(--text-secondary);
    text-align: right;
}

.track-row-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.row-action-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-quick);
}

.row-action-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
}

.row-action-btn.active {
    color: var(--accent);
}

/* Fila de Reprodução */
.queue-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.btn-clear-queue {
    background: rgba(255, 59, 48, 0.1);
    color: #ff3b30;
    border: 1px solid rgba(255, 59, 48, 0.2);
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-family: var(--font-main);
    font-weight: 600;
    font-size: 13px;
    transition: var(--transition-quick);
}

.btn-clear-queue:hover {
    background: rgba(255, 59, 48, 0.2);
}

/* Empty State global */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
    padding: 40px 0;
    border: 1px dashed var(--border);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.01);
}

/* Playlists Grid */
.playlists-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 20px;
}

.playlist-card {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.4) 0%, rgba(15, 23, 42, 0.6) 100%);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px;
    cursor: pointer;
    transition: var(--transition-smooth);
    min-height: 140px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.playlist-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.4);
}

.playlist-card-icon {
    color: var(--accent);
    margin-bottom: 24px;
}

.playlist-card-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
}

.playlist-card-count {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Playlist Detail View */
.playlist-detail-view {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.playlist-detail-header {
    display: flex;
    align-items: center;
    gap: 20px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 20px;
}

.btn-back {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-quick);
}

.btn-back:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.05);
}

.playlist-info {
    flex-grow: 1;
}

.playlist-info h1 {
    font-size: 28px;
    font-weight: 700;
}

.playlist-info p {
    color: var(--text-secondary);
    font-size: 14px;
}

.btn-delete-playlist {
    background: transparent;
    border: 1px solid #ff3b30;
    color: #ff3b30;
    padding: 10px 20px;
    border-radius: 20px;
    cursor: pointer;
    font-family: var(--font-main);
    font-weight: 600;
    font-size: 13px;
    transition: var(--transition-quick);
}

.btn-delete-playlist:hover {
    background: #ff3b30;
    color: #ffffff;
}

/* ==========================================================================
   Visualizador Lateral (Direita)
   ========================================================================== */
.right-panel {
    background: rgba(9, 9, 11, 0.5);
    border-left: 1px solid var(--border);
    backdrop-filter: var(--glass-blur);
    padding: 24px;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 10;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), width 0.4s ease;
    overflow-y: auto;
}

.right-panel.collapsed {
    transform: translateX(100%);
    width: 0px;
    padding: 0;
    border-left: none;
}

.toggle-panel-btn {
    position: absolute;
    left: -16px;
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--bg-surface-solid);
    border: 1px solid var(--border);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    z-index: 20;
    transition: var(--transition-quick);
}

.toggle-panel-btn:hover {
    color: var(--accent);
    transform: translateY(-50%) scale(1.1);
}

.right-panel.collapsed .toggle-panel-btn {
    transform: translateY(-50%) rotate(180deg);
    left: -40px;
}

.panel-content {
    display: flex;
    flex-direction: column;
    gap: 32px;
    height: 100%;
    opacity: 1;
    transition: opacity 0.2s ease;
}

.right-panel.collapsed .panel-content {
    opacity: 0;
    pointer-events: none;
}

.now-playing-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 20px;
}

.cover-wrapper {
    width: 200px;
    height: 200px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.5);
    background: #18181b;
}

.big-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.track-details h2 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.track-details h3 {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 400;
}

.visualizer-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
    flex-grow: 1;
    justify-content: center;
}

#visualizer-canvas {
    width: 100%;
    height: 180px;
    background: rgba(255, 255, 255, 0.01);
    border-radius: 16px;
    border: 1px solid var(--border);
}

.visualizer-controls {
    display: flex;
    justify-content: center;
    gap: 8px;
}

.visualizer-mode-btn {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 12px;
    font-family: var(--font-main);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-quick);
}

.visualizer-mode-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
}

.visualizer-mode-btn.active {
    background: var(--accent);
    color: #09090b;
    border-color: var(--accent);
}

/* ==========================================================================
   Barra de Controle do Player Inferior
   ========================================================================== */
.player-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100vw;
    height: 90px;
    background: rgba(18, 18, 22, 0.85);
    border-top: 1px solid var(--border);
    backdrop-filter: blur(25px) saturate(150%);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 32px;
    z-index: 100;
}

/* Detalhes da música atual */
.player-left {
    display: flex;
    align-items: center;
    gap: 16px;
    width: 25%;
    min-width: 200px;
}

.mini-album-art-wrapper {
    width: 52px;
    height: 52px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    background: #18181b;
}

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

.mini-track-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
    flex-grow: 1;
}

.mini-title-scroll {
    overflow: hidden;
    position: relative;
    white-space: nowrap;
}

#player-track-title {
    font-size: 14px;
    font-weight: 600;
    display: inline-block;
}

#player-track-artist {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.player-fav-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-quick);
}

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

/* Controles Centrais */
.player-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    width: 50%;
}

.control-buttons {
    display: flex;
    align-items: center;
    gap: 18px;
}

.player-ctrl-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-quick);
    border-radius: 50%;
}

.player-ctrl-btn:hover {
    color: var(--text-primary);
}

.play-pause-btn {
    width: 42px;
    height: 42px;
    background: var(--text-primary);
    color: #09090b;
    border-radius: 50%;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.play-pause-btn:hover {
    background: #ffffff;
    transform: scale(1.06);
}

.player-ctrl-btn.active {
    color: var(--accent);
    filter: drop-shadow(0 0 4px var(--accent-glow));
}

.progress-container {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    max-width: 540px;
}

.time-stamp {
    font-size: 11px;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
    width: 35px;
}

#current-time {
    text-align: right;
}

#total-duration {
    text-align: left;
}

.progress-bar-wrapper {
    flex-grow: 1;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    cursor: pointer;
    position: relative;
    display: flex;
    align-items: center;
    transition: height 0.1s ease;
}

.progress-bar-wrapper:hover {
    height: 6px;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: var(--accent);
    border-radius: 2px;
    position: relative;
}

.progress-bar-wrapper:hover .progress-bar {
    background: var(--accent-hover);
}

.progress-knob {
    position: absolute;
    right: -6px;
    top: 50%;
    transform: translateY(-50%) scale(0);
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #ffffff;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
    transition: transform 0.1s ease;
}

.progress-bar-wrapper:hover .progress-knob {
    transform: translateY(-50%) scale(1);
}

/* Volume e Controles Secundários */
.player-right {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 16px;
    width: 25%;
    min-width: 200px;
}

.volume-container {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 120px;
}

.volume-slider-wrapper {
    flex-grow: 1;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    cursor: pointer;
    position: relative;
}

.volume-slider {
    height: 100%;
    width: 70%;
    background: var(--text-primary);
    border-radius: 2px;
}

.volume-slider-wrapper:hover .volume-slider {
    background: var(--accent);
}

/* ==========================================================================
   Modais (Criação de Playlists)
   ========================================================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.active {
    display: flex;
    animation: fadeIn 0.25s ease;
}

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

.modal-content {
    background: #18181b;
    border: 1px solid var(--border);
    padding: 32px;
    border-radius: 20px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    transform: translateY(0);
    transition: transform 0.3s ease;
}

.modal.active .modal-content {
    animation: slideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideUp {
    from { transform: translateY(30px); }
    to { transform: translateY(0); }
}

.modal-content h2 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 20px;
}

.modal-content input {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px 16px;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 15px;
    outline: none;
    margin-bottom: 24px;
    transition: var(--transition-quick);
}

.modal-content input:focus {
    border-color: var(--accent);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.btn-cancel {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 10px 20px;
    border-radius: 12px;
    cursor: pointer;
    font-family: var(--font-main);
    font-weight: 600;
    transition: var(--transition-quick);
}

.btn-cancel:hover {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
}

.btn-confirm {
    background: var(--accent);
    border: none;
    color: #09090b;
    padding: 10px 24px;
    border-radius: 12px;
    cursor: pointer;
    font-family: var(--font-main);
    font-weight: 700;
    transition: var(--transition-quick);
}

.btn-confirm:hover {
    background: var(--accent-hover);
}

/* Ocultar elementos técnicos */
.hidden-playback-elements {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    overflow: hidden;
    pointer-events: none;
}

/* ==========================================================================
   Responsividade (Layout Fluido)
   ========================================================================== */
@media (max-width: 1024px) {
    .app-container {
        grid-template-columns: 200px 1fr;
    }
    .right-panel {
        position: fixed;
        right: 0;
        top: 0;
        height: calc(100vh - 90px);
        width: 300px;
        transform: translateX(100%);
        box-shadow: -10px 0 30px rgba(0,0,0,0.5);
    }
    .right-panel.active {
        transform: translateX(0);
    }
    .toggle-panel-btn {
        display: none;
    }
}

@media (max-width: 768px) {
    .app-container {
        grid-template-columns: 1fr;
        height: calc(100vh - 140px); /* Mais espaço no mobile */
    }
    
    .sidebar {
        position: fixed;
        bottom: 90px;
        left: 0;
        width: 100vw;
        height: 60px;
        flex-direction: row;
        justify-content: space-around;
        padding: 4px 16px;
        border-right: none;
        border-top: 1px solid var(--border);
        border-radius: 20px 20px 0 0;
        background: rgba(9, 9, 11, 0.9);
    }
    
    .logo, .sidebar-divider, .playlists-sidebar {
        display: none;
    }
    
    .nav-menu {
        flex-direction: row;
        width: 100%;
        justify-content: space-between;
    }
    
    .nav-item {
        flex-direction: column;
        align-items: center;
        gap: 4px;
        font-size: 10px;
        padding: 6px 12px;
        text-align: center;
    }
    
    .main-content {
        padding: 16px 20px;
    }
    
    .top-header {
        margin-bottom: 20px;
    }
    
    .player-bar {
        height: 110px;
        flex-direction: column;
        justify-content: space-between;
        padding: 12px 20px;
    }
    
    .player-left {
        width: 100%;
        margin-bottom: 8px;
    }
    
    .player-center {
        width: 100%;
        margin-bottom: 8px;
    }
    
    .player-right {
        display: none; /* Oculta volume no mobile para simplificar */
    }
    
    .track-row {
        grid-template-columns: 40px 1fr 60px;
        gap: 12px;
        padding: 8px;
    }
    
    .track-row-album, .track-row-index, .track-row-actions {
        display: none;
    }
}