/* Modern CSS Reset and Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg-primary: #0f0f14;
    --bg-secondary: #1a1a24;
    --bg-card: #24242f;
    --bg-hover: #2d2d3a;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --accent-glow: rgba(59, 130, 246, 0.3);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #3f3f50;
    --shadow: rgba(0, 0, 0, 0.4);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
}

body {
    background: var(--bg-primary);
    background-image: 
        radial-gradient(ellipse at top, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at bottom right, rgba(37, 99, 235, 0.06) 0%, transparent 50%);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    font-size: 24px;
    line-height: 1.6;
    color: var(--text-secondary);
    min-height: 100vh;
}

h1, h2, h3 {
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(3rem, 7.5vw, 4.5rem);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--accent-hover);
}

/* Layout */
#main {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

#content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    max-width: 1400px;
    width: 100%;
    box-shadow: 
        0 4px 6px -1px var(--shadow),
        0 25px 50px -12px var(--shadow);
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.header img {
    max-width: 400px;
    height: auto;
    filter: drop-shadow(0 4px 12px var(--shadow));
}

/* CTA Card */
#biglink {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

#biglink:hover {
    background: linear-gradient(135deg, var(--accent) 0%, #2563eb 100%);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
}

#biglink td {
    border: none;
    padding: 0;
}

#biglink img {
    width: 64px;
    height: 64px;
    flex-shrink: 0;
    filter: drop-shadow(0 2px 8px var(--shadow));
}

#biglink a {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
}

#biglink:hover a {
    color: white;
}

#biglink strong {
    color: var(--text-primary);
    font-weight: 600;
}

#biglink:hover strong {
    color: white;
}

/* Archive Section */
.archive-section {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    text-align: center;
}

.archive-section h2 {
    font-size: 1.875rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Version Cards Grid */
.versions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
}

.version-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem;
    transition: all 0.2s ease;
    text-align: center;
}

.version-card:hover {
    background: var(--bg-hover);
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 12px 24px var(--shadow);
}

.version-card a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
}

.version-card:hover a {
    color: var(--text-primary);
}

.version-card img {
    width: 100%;
    max-width: 300px;
    height: auto;
    aspect-ratio: auto;
    object-fit: contain;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    filter: drop-shadow(0 4px 8px var(--shadow));
    transition: transform 0.2s ease;
}

.version-card:hover img {
    transform: scale(1.05);
}

.version-card .version-year {
    font-size: 1.125rem;
    color: var(--text-muted);
}

.version-card .version-number {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.5rem;
}

.version-card .version-song {
    font-size: 1.05rem;
    color: var(--text-muted);
    font-style: italic;
    line-height: 1.4;
}

/* Responsive Design */
@media (max-width: 768px) {
    #main {
        padding: 1rem;
    }
    
    #content {
        padding: 1.5rem;
        border-radius: var(--radius-md);
    }
    
    #biglink {
        flex-direction: column;
        text-align: center;
        padding: 1.5rem;
    }
    
    #biglink a {
        flex-direction: column;
        text-align: center;
    }
    
    .versions-grid {
        grid-template-columns: 1fr;
    }
}

/* Utility classes */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }