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

:root {
    --primary: #00ff9a;
    --dark: #000000;
    --light: #ffffff;
    --gray: #f5f5f5;
    --dark-gray: #333333;
    --light-gray: #e8e8e8;
}

body {
    font-family: 'Arial', sans-serif;
    background-color: var(--gray);
    color: #333;
}

/* Navbar */
.navbar {
    background-color: var(--light);
    padding: 1rem 0;
    border-bottom: 2px solid var(--dark);
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.navbar-brand h1 {
    font-size: 2rem;
    font-weight: bold;
    color: var(--dark);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 600;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: var(--primary);
}

.nav-right {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.subscribe-btn, .login-btn {
    padding: 0.5rem 1.5rem;
    border: 1px solid var(--dark);
    background-color: transparent;
    color: var(--dark);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
}

.subscribe-btn:hover {
    background-color: var(--primary);
    color: var(--dark);
}

.login-btn {
    text-decoration: none;
    display: inline-block;
}

.login-btn:hover {
    background-color: var(--dark);
    color: var(--primary);
}

.search-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Container Layout */
.container {
    display: flex;
    max-width: 1400px;
    margin: 0 auto;
    min-height: calc(100vh - 200px);
}

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: var(--dark);
    padding: 2rem 1rem;
    border-right: 2px solid var(--primary);
}

.sidebar-header h2 {
    font-size: 1rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
}

.sidebar-link {
    padding: 0.75rem 1rem;
    color: var(--light);
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: all 0.3s;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
}

.sidebar-link:hover {
    background-color: var(--dark-gray);
    border-left-color: var(--primary);
    color: var(--primary);
}

.sidebar-link.active {
    background-color: var(--dark-gray);
    border-left-color: var(--primary);
    color: var(--primary);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 2rem;
    background-color: var(--gray);
}

.chart-header {
    background-color: var(--dark);
    margin: -2rem -2rem 2rem -2rem;
    padding: 2rem;
    text-align: center;
    border-bottom: 2px solid var(--primary);
}

.chart-title {
    font-size: 3rem;
    font-weight: bold;
    color: var(--light);
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.chart-date {
    background-color: var(--light);
    color: var(--dark);
    padding: 1rem;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.chart-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.control-btn {
    background-color: var(--dark);
    border: 2px solid var(--primary);
    padding: 0.5rem 1rem;
    color: var(--primary);
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s;
    border-radius: 4px;
}

.control-btn:hover {
    background-color: var(--primary);
    color: var(--dark);
}

/* Songs Container */
.songs-container {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.song-item-container {
    background-color: var(--light);
    margin-bottom: 0;
    border-left: 4px solid var(--primary);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s;
}

.song-item-container:hover {
    box-shadow: 0 8px 20px rgba(0, 255, 154, 0.2);
}

.song-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    background-color: var(--light);
    color: #333;
    cursor: pointer;
    transition: all 0.3s;
    gap: 2rem;
}

.song-card:hover {
    background-color: #fafafa;
}

/* Card sections */
.card-left {
    display: flex;
    gap: 1rem;
    align-items: center;
    min-width: fit-content;
}

.song-rank {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--dark);
    background-color: var(--primary);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    min-width: 70px;
    text-align: center;
}

.song-image {
    width: 120px;
    height: 120px;
    overflow: hidden;
    border-radius: 4px;
    flex-shrink: 0;
}

.song-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Card middle - song info */
.card-middle {
    flex: 1;
}

.card-middle h3 {
    font-size: 1.3rem;
    margin-bottom: 0.3rem;
    color: var(--dark);
}

.artist-name {
    font-size: 1rem;
    color: #666;
}

/* Card right - spotify */
.card-right {
    display: flex;
    align-items: center;
    min-width: fit-content;
}

.spotify-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background-color: var(--primary);
    color: var(--dark);
    text-decoration: none;
    border-radius: 50%;
    font-size: 1.5rem;
    transition: all 0.3s;
}

.spotify-link:hover {
    transform: scale(1.1);
    box-shadow: 0 0 10px var(--primary);
}

/* Song Slider - Expandable Section */
.song-slider {
    max-height: 0;
    overflow: hidden;
    background-color: var(--dark);
    transition: max-height 0.5s ease;
}

.song-slider.expanded {
    max-height: 600px;
    overflow-y: auto;
}

.slider-content {
    padding: 2rem;
    color: var(--light);
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.slider-section {
    padding-bottom: 1.5rem;
    border-bottom: 1px solid #555;
}

.slider-section:last-child {
    border-bottom: none;
}

.slider-section.full-width {
    width: 100%;
}

.section-label {
    font-size: 0.75rem;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    display: block;
    margin-bottom: 1rem;
}

/* Share icons */
.share-icons {
    display: flex;
    gap: 1rem;
}

.share-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 2px solid var(--primary);
    color: var(--primary);
    text-decoration: none;
    border-radius: 4px;
    font-weight: bold;
    transition: all 0.3s;
    font-size: 1rem;
}

.share-icon:hover {
    background-color: var(--primary);
    color: var(--dark);
}

/* Description section */
.description-text {
    color: #ccc;
    line-height: 1.6;
}

/* Footer */
.footer {
    background-color: var(--dark);
    border-top: 2px solid var(--primary);
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    color: var(--primary);
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.footer-section ul {
    list-style: none;
}

.footer-section a {
    color: var(--light);
    text-decoration: none;
    display: block;
    padding: 0.3rem 0;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid var(--dark-gray);
    padding-top: 1rem;
    color: #999;
}

.no-songs, .no-chart {
    text-align: center;
    padding: 2rem;
    color: #666;
    font-size: 1.1rem;
}