:root {
    --bg-dark: #0f0f12;
    --bg-card: #18181c;
    --bg-hover: #26262e;
    --accent: #8a2be2;
    --accent-hover: #9d4edf;
    --text-primary: #f1f1f1;
    --text-secondary: #aaaaaa;
    --border-color: #2a2a32;
    --sidebar-width: 260px;
    --lyrics-width: 300px;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: calc(100vh - 90px);
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: #121215;
    border-right: 1px solid var(--border-color);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    overflow-y: auto;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--accent);
}

.brand-icon {
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-item {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 10px 14px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    transition: all 0.2s;
}

.nav-item:hover, .nav-item.active {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.nav-section h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.tags-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
}

.tags-grid button, .tags-list button {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.2s;
    text-align: left;
}

.tags-grid button:hover, .tags-list button:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.tags-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.top-bar {
    padding: 16px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.search-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 8px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    width: 350px;
}

.search-box input {
    background: transparent;
    border: none;
    color: var(--text-primary);
    outline: none;
    width: 100%;
}

.content-body {
    padding: 30px;
}

.card-header h1 {
    font-size: 2rem;
    margin-bottom: 6px;
}

.card-header p {
    color: var(--text-secondary);
    margin-bottom: 25px;
}

/* Track List */
.track-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.track-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border-radius: 8px;
    background: var(--bg-card);
    cursor: pointer;
    transition: background 0.2s;
}

.track-item:hover {
    background: var(--bg-hover);
}

.track-item.active {
    border-left: 4px solid var(--accent);
    background: var(--bg-hover);
}

.track-index {
    width: 30px;
    color: var(--text-secondary);
}

.track-meta {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.track-title-text {
    font-weight: 600;
}

.track-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.track-duration {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Panel Direito (Lyrics) */
.lyrics-panel {
    width: var(--lyrics-width);
    border-left: 1px solid var(--border-color);
    background: #121215;
    padding: 20px;
    display: flex;
    flex-direction: column;
}

.panel-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    padding: 8px;
    cursor: pointer;
    font-weight: 600;
}

.tab-btn.active {
    border-color: var(--accent);
    color: var(--text-primary);
}

.panel-content {
    overflow-y: auto;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
    white-space: pre-wrap;
}

/* Bottom Player */
.player-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 90px;
    background: #09090b;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 100;
}

.track-info {
    display: flex;
    align-items: center;
    gap: 15px;
    width: 25%;
}

.track-art {
    width: 55px;
    height: 55px;
    background: var(--bg-card);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--accent);
}

.track-details {
    display: flex;
    flex-direction: column;
}

.track-name {
    font-weight: 600;
    font-size: 0.95rem;
}

.track-artist {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.player-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    width: 45%;
}

.control-buttons {
    display: flex;
    align-items: center;
    gap: 20px;
}

.control-buttons button {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.1rem;
    cursor: pointer;
}

.control-buttons button:hover {
    color: var(--text-primary);
}

.play-btn {
    background: var(--accent) !important;
    color: #fff !important;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.progress-container {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
}

.progress-container span {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.progress-container input[type=range], .volume-controls input[type=range] {
    flex: 1;
    accent-color: var(--accent);
    cursor: pointer;
}

.volume-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 20%;
    justify-content: flex-end;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
    z-index: 1000;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal-card {
    background: var(--bg-card);
    padding: 30px;
    border-radius: 12px;
    width: 400px;
    position: relative;
    border: 1px solid var(--border-color);
}

.modal-large { width: 700px; }

.close-btn {
    position: absolute;
    top: 15px; right: 15px;
    background: transparent; border: none;
    color: var(--text-secondary); font-size: 1.5rem; cursor: pointer;
}

.hidden { display: none !important; }