:root {
    --bg-color: #121212;
    --text-color: #ffffff;
    --primary-color: #bb86fc;
    --secondary-color: #03dac6;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-blur: 10px;
    --radius: 12px;
    --gap: 16px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Glassmorphism Utilities */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
}

.btn {
    background: var(--primary-color);
    color: #000;
    border: none;
    padding: 10px 20px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    transition: filter 0.2s;
}

.btn:hover {
    filter: brightness(1.1);
}

.btn-icon {
    background: transparent;
    color: var(--text-color);
    font-size: 1.2rem;
    padding: 8px;
    border-radius: 50%;
}

.btn-icon:hover {
    background: var(--glass-bg);
}

/* Layout */
.app-container {
    display: grid;
    grid-template-rows: auto 1fr auto; /* Header, Content, Player */
    height: 100vh;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Header */
header {
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    margin-left: 20px;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.nav-links a.active, .nav-links a:hover {
    opacity: 1;
}

/* Main Content */
main {
    padding: 20px;
    overflow-y: auto;
}

.search-bar {
    width: 100%;
    max-width: 600px;
    margin: 0 auto 30px;
    display: flex;
}

.search-bar input {
    flex: 1;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: white;
    padding: 12px 20px;
    border-radius: 25px;
    outline: none;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: transform 0.2s;
    cursor: pointer;
}

.card:hover {
    transform: translateY(-5px);
}

.card-image {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    background: #333;
    border-radius: var(--radius);
}

.card-content {
    padding: 10px 5px;
}

.card-title {
    font-size: 0.9rem;
    font-weight: bold;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-subtitle {
    font-size: 0.8rem;
    color: #aaa;
}

/* Player Bar */
.player-bar {
    padding: 15px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid var(--glass-border);
    background: #000; /* Solid background for visibility */
}

.player-info {
    display: flex;
    align-items: center;
    width: 30%;
    overflow: hidden;
}

.player-art {
    width: 50px;
    height: 50px;
    border-radius: 8px;
    margin-right: 15px;
    background: #333;
    object-fit: cover;
}

.player-text {
    flex: 1;
    overflow: hidden;
}

.track-title {
    font-size: 0.9rem;
    font-weight: bold;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-artist {
    font-size: 0.75rem;
    color: #aaa;
}

.player-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 40%;
}

.control-buttons {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 5px;
}

.play-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--text-color);
    color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    border: none;
    cursor: pointer;
}

.progress-container {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.75rem;
    color: #aaa;
}

input[type="range"] {
    flex: 1;
    accent-color: var(--primary-color);
    height: 4px;
    cursor: pointer;
}

.player-extra {
    width: 30%;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 10px;
}

/* Login Page */
.login-container {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at top right, #2a2a2a, #121212);
}

.login-box {
    padding: 40px;
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-box h1 {
    margin-bottom: 30px;
    color: var(--primary-color);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.login-form input {
    width: 100%;
    padding: 12px;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    color: white;
}

.error-msg {
    color: #cf6679;
    margin-top: 10px;
    font-size: 0.9rem;
}

/* Spinner */
.loader {
    border: 3px solid rgba(255,255,255,0.1);
    border-radius: 50%;
    border-top: 3px solid var(--primary-color);
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Tracklist in Modal or Expanded View */
.track-list {
    list-style: none;
    margin-top: 20px;
}

.track-item {
    display: flex;
    align-items: center;
    padding: 10px;
    border-bottom: 1px solid var(--glass-border);
    cursor: pointer;
    transition: background 0.2s;
}

.track-item:hover {
    background: rgba(255,255,255,0.05);
}

.track-number {
    width: 30px;
    color: #aaa;
}

.track-name {
    flex: 1;
}

.track-duration {
    color: #aaa;
    font-size: 0.85rem;
}