:root {
    --bg-dark: #05080c;
    --bg-card: #10141b;
    --accent: #d4af37;
    --accent-light: #f1e5ac;
    --text-main: #f8f8f8;
    --text-muted: #8a94a1;
    --border: #1e2631;
    --font-serif: "Noto Serif JP", serif;
    --font-sans: "Inter", sans-serif;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-serif);
    line-height: 1.8;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: 0.3s;
}

ul {
    list-style: none;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    height: 80px;
    display: flex;
    align-items: center;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(5, 8, 12, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--accent);
}

nav ul {
    display: flex;
    gap: 20px;
}

.nav-link {
    font-size: 0.85rem;
    font-family: var(--font-sans);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent);
}

/* Hero */
.hero {
    height: 100vh;
    background: radial-gradient(circle at center, rgba(16, 20, 27, 0.4) 0%, rgba(5, 8, 12, 1) 100%),
        linear-gradient(135deg, #05080c 0%, #10141b 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml;utf8,<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg"><filter id="noiseFilter"><feTurbulence type="fractalNoise" baseFrequency="0.65" numOctaves="3" stitchTiles="stitch"/></filter><rect width="100%" height="100%" filter="url(%23noiseFilter)"/></svg>');
    opacity: 0.05;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 10;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    color: var(--accent-light);
    letter-spacing: 0.05em;
}

.hero-content p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 30px;
    color: var(--text-muted);
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 4px;
    font-family: var(--font-sans);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--accent);
    color: #000;
}

.btn-outline {
    border: 1px solid var(--accent);
    color: var(--accent);
    margin-left: 15px;
}

/* Sections */
.section {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 10px;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background: var(--bg-card);
    padding: 40px;
    border: 1px solid var(--border);
    transition: 0.3s;
}

.card:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
}

.card h3 {
    margin-bottom: 15px;
    color: var(--accent-light);
}

/* Sub-hero */
.page-header {
    padding: 160px 0 80px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    color: var(--accent-light);
}

/* Footer */
footer {
    padding: 60px 0;
    background: #030508;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
}

.footer-links ul {
    display: flex;
    gap: 20px;
}

/* Mobile */
@media (max-width: 768px) {
    nav {
        display: none;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }
}