@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Outfit:wght@600;700;800&display=swap');

:root {
    --bg-color: #050505;
    --surface-color: rgba(15, 23, 42, 0.8);
    --border-color: rgba(57, 255, 20, 0.2);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-green: #39ff14;
    --accent-cyan: #00ffff;
    --accent-red: #8b0000;
    --card-shadow: 0 0 20px rgba(57, 255, 20, 0.1);
}

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

body {
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(220, 20, 60, 0.45) 0%, transparent 50%),
        radial-gradient(circle at 90% 80%, rgba(139, 0, 0, 0.5) 0%, transparent 60%),
        radial-gradient(circle at 50% 50%, rgba(178, 34, 34, 0.3) 0%, transparent 70%),
        radial-gradient(circle at 0% 100%, rgba(255, 0, 0, 0.35) 0%, transparent 50%),
        linear-gradient(135deg, #050505 0%, #0a0a0a 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    min-height: 100vh;
    padding-bottom: 4rem;
}

h1, h2, h3 {
    font-family: 'Outfit', sans-serif;
    letter-spacing: -0.02em;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header / Hero Section */
header {
    padding: 6rem 0 4rem;
    text-align: center;
}

.hero-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 24px;
    margin-bottom: 2rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
}

h1 {
    font-size: clamp(2rem, 10vw, 4rem);
    background: linear-gradient(to bottom, #ffffff 0%, #cbd5e1 50%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-transform: uppercase;
    font-weight: 800;
    text-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
    margin-bottom: 1.5rem;
    position: relative;
    letter-spacing: 0.1em;
}

h1::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--accent-green);
    box-shadow: 0 0 15px var(--accent-green);
}

.status-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(244, 63, 94, 0.1);
    color: #fb7185;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
    border: 1px solid rgba(244, 63, 94, 0.2);
}

/* Music Cards */
.archive-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.card {
    background: var(--surface-color);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 4px; /* より鋭利なデザイン */
    padding: 2.5rem;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s;
}

.card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: var(--accent-green);
    box-shadow: 0 0 30px rgba(57, 255, 20, 0.2);
}

.card:hover::before {
    transform: translateX(100%);
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--accent-cyan);
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

.btn-primary {
    background: var(--accent-green);
    color: #000;
    font-weight: 700;
    text-transform: uppercase;
    box-shadow: 0 0 10px rgba(57, 255, 20, 0.3);
}

.btn-primary:hover {
    background: #fff;
    color: #000;
    box-shadow: 0 0 20px var(--accent-green);
    transform: scale(1.1);
}

.btn-secondary {
    background: transparent;
    color: var(--accent-cyan);
    border: 1px solid var(--accent-cyan);
    text-transform: uppercase;
}

.btn-secondary:hover {
    background: rgba(0, 255, 255, 0.1);
    box-shadow: 0 0 15px var(--accent-cyan);
}

/* iframe / Soundcloud */
iframe {
    border-radius: 12px;
    margin-top: 1rem;
}

/* Footnotes / Counters */
.footer-info {
    margin-top: 4rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.8125rem;
}

/* Animations */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.card {
    animation: fadeInUp 0.6s ease forwards;
}

/* Responsive */
@media (max-width: 640px) {
    h1 { font-size: 2.25rem; }
    .hero-image { height: 200px; }
}