/* 1. CSS Variables (:root) */
:root {
    --bg-black: #121212;
    --card-bg: #181818;
    --spotify-pink: #ff4d8d;
    --text-white: #ffffff;
    --text-gray: #b3b3b3;
    --main-font: 'Poppins', sans-serif;
}

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

body {
    background-color: var(--bg-black);
    color: var(--text-white);
    font-family: var(--main-font);
    line-height: 1.6;
}

/* 2. Layout: Header with Flexbox */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 5%;
    background-color: rgba(0, 0, 0, 0.9);
    position: sticky; /* Positioning technique */
    top: 0;
    z-index: 1000;
}

.logo { font-size: 1.5rem; font-weight: bold; color: var(--spotify-pink); }

nav ul {
    display: flex;
    list-style: none;
    gap: 20px;
}

nav a {
    text-decoration: none;
    color: var(--text-white);
    transition: 0.3s;
}

nav a:hover { color: var(--spotify-pink); }

/* 3. Layout: Grid for Artists/Albums */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 25px;
    padding: 40px 5%;
}

.artist-card {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s ease;
}

.artist-card:hover {
    transform: scale(1.05); /* Hover effect */
    background-color: #282828;
}

.artist-card img {
    width: 100%;
    aspect-ratio: 1/1;
    border-radius: 50%; /* Круглые фото как в Spotify */
    object-fit: cover;
    margin-bottom: 15px;
}

/* 4. Pseudo-class :nth-child() for Table */
table {
    width: 90%;
    margin: 20px auto;
    border-collapse: collapse;
}

tr:nth-child(even) { background-color: #1a1a1a; } /* Zebra stripes */

th, td { padding: 15px; text-align: left; border-bottom: 1px solid #333; }
th { color: var(--spotify-pink); }

/* 5. Responsive Design (Media Queries) */
@media (max-width: 992px) {
    header { flex-direction: column; gap: 15px; }
    .responsive-title { font-size: 2rem; }
}

@media (max-width: 576px) {
    nav ul { flex-direction: column; align-items: center; }
    .grid-container { grid-template-columns: 1fr; }
}

/* Footer */
footer {
    padding: 40px 5%;
    text-align: center;
    background-color: #000;
    margin-top: 50px;
}