/* CSS Variables */
:root {
    --spotify-green: #1DB954;
    --spotify-green-dark: #1aa34a;
    --bg-dark: #121212;
    --bg-card: #1e1e1e;
    --bg-card-hover: #282828;
    --bg-genre: #2a2a2a;
    --bg-genre-hover: #3a3a3a;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-muted: #666666;
    --border-radius: 12px;
    --border-radius-sm: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--spotify-green), #1ed760);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Cards */
.card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

/* Search Container */
.search-container {
    position: relative;
}

#search-input {
    width: 100%;
    padding: 1rem 1.25rem;
    padding-right: 100px;
    font-size: 1.1rem;
    background: var(--bg-dark);
    border: 2px solid var(--bg-card-hover);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    transition: border-color 0.2s ease;
}

#search-input:focus {
    outline: none;
    border-color: var(--spotify-green);
}

#search-input::placeholder {
    color: var(--text-muted);
}

.match-count {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--spotify-green);
    font-size: 0.875rem;
    font-weight: 600;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.btn-back {
    background: var(--bg-genre);
    color: var(--text-primary);
}

.btn-back:hover {
    background: var(--bg-genre-hover);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    background: var(--bg-genre);
    color: var(--text-secondary);
}

.btn-small:hover {
    background: var(--bg-genre-hover);
    color: var(--text-primary);
}

/* Loading */
.loader {
    width: 48px;
    height: 48px;
    border: 4px solid var(--bg-card-hover);
    border-top-color: var(--spotify-green);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

#loading-section {
    text-align: center;
    padding: 3rem 1.5rem;
}

/* ================================
   MAIN GENRES GRID - Big Cards
   ================================ */
.main-genres-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1rem;
}

.main-genre-card {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-card-hover) 100%);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.main-genre-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--spotify-green);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.main-genre-card:hover {
    transform: translateY(-4px);
    border-color: var(--spotify-green);
    box-shadow: 0 8px 30px rgba(29, 185, 84, 0.2);
}

.main-genre-card:hover::before {
    transform: scaleX(1);
}

.main-genre-name {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.main-genre-count {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.main-genre-arrow {
    position: absolute;
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    color: var(--text-muted);
    transition: all 0.3s ease;
}

.main-genre-card:hover .main-genre-arrow {
    color: var(--spotify-green);
    transform: translateY(-50%) translateX(4px);
}

/* ================================
   ARTISTS VIEW
   ================================ */
.artists-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.artists-header h2 {
    font-size: 1.75rem;
    color: var(--spotify-green);
    flex: 1;
}

.artists-count {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ================================
   SEARCH RESULTS
   ================================ */
.results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.results-header h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

/* ================================
   ARTIST TAGS (clickable pills)
   ================================ */
.artists-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.artist-tag {
    display: inline-flex;
    align-items: center;
    padding: 0.6rem 1rem;
    background: var(--bg-genre);
    border-radius: 50px;
    color: var(--text-primary);
    font-size: 0.9rem;
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
}

.artist-tag:hover {
    background: var(--spotify-green);
    color: var(--bg-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(29, 185, 84, 0.3);
}

/* Search result highlight */
.artist-tag mark {
    background: transparent;
    color: var(--spotify-green);
    font-weight: 700;
}

.artist-tag:hover mark {
    color: var(--bg-dark);
}

/* Genre badge in search results */
.artist-tag .genre-badge {
    margin-left: 0.5rem;
    padding: 0.15rem 0.5rem;
    background: rgba(255,255,255,0.1);
    border-radius: 20px;
    font-size: 0.7rem;
    color: var(--text-muted);
}

.artist-tag:hover .genre-badge {
    background: rgba(0,0,0,0.2);
    color: var(--bg-dark);
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Utility */
.hidden {
    display: none !important;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    header h1 {
        font-size: 1.75rem;
    }

    .main-genres-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }

    .main-genre-name {
        font-size: 1.2rem;
    }

    .artists-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .artist-tag {
        padding: 0.5rem 0.875rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .main-genres-grid {
        grid-template-columns: 1fr;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-card-hover);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}