:root {
  --bg: #0f1220;
  --bg-alt: #171b2e;
  --card: #1d2238;
  --text: #eef0f8;
  --text-dim: #a3a8c3;
  --accent: #ff6b6b;
  --accent-2: #ffd166;
  --border: #2a3050;
  --radius: 14px;
  --max-width: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Hiragino Sans", "Yu Gothic", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

a { color: var(--accent-2); }

img { max-width: 100%; display: block; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

header.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(15, 18, 32, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
}

.logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.logo span { color: var(--accent); }

nav.main-nav ul {
  display: flex;
  gap: 24px;
  list-style: none;
  margin: 0;
  padding: 0;
}

nav.main-nav a {
  color: var(--text-dim);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

nav.main-nav a:hover { color: var(--text); }

.hero {
  padding: 64px 0 40px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin: 0 0 12px;
}

.hero p {
  color: var(--text-dim);
  max-width: 640px;
  margin: 0 auto;
  font-size: 1.05rem;
}

.section {
  padding: 40px 0;
}

.section h2 {
  font-size: 1.5rem;
  margin-bottom: 6px;
}

.section .lead {
  color: var(--text-dim);
  margin-top: 0;
  margin-bottom: 28px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.card .rank {
  display: inline-block;
  font-weight: 800;
  color: var(--accent);
  font-size: 0.85rem;
}

.cover-placeholder {
  width: 100%;
  aspect-ratio: 3 / 4;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--bg-alt), #262c4a);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.85rem;
  padding: 12px;
}

.card h3 {
  margin: 0;
  font-size: 1.1rem;
}

.card .meta {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin: 0;
}

.card .desc {
  font-size: 0.9rem;
  color: var(--text-dim);
  margin: 0;
  flex-grow: 1;
}

.buy-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.btn {
  display: inline-block;
  padding: 10px 14px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  text-align: center;
  flex: 1;
  min-width: 120px;
  transition: opacity 0.15s ease;
}

.btn:hover { opacity: 0.85; }

.btn-amazon { background: #ff9900; color: #14171f; }
.btn-dmm { background: #3ba0ff; color: #0b1220; }

.affiliate-note {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-top: 4px;
}

.cta-banner {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  margin: 40px 0;
}

.cta-banner a.btn {
  display: inline-block;
  flex: none;
  min-width: 200px;
  margin-top: 12px;
}

footer.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 60px;
  padding: 32px 0;
  color: var(--text-dim);
  font-size: 0.85rem;
}

footer.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  align-items: center;
}

footer.site-footer nav ul {
  display: flex;
  gap: 16px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

footer.site-footer nav a {
  color: var(--text-dim);
  text-decoration: none;
}

footer.site-footer nav a:hover { color: var(--text); }

.disclosure-banner {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.78rem;
  text-align: center;
  padding: 8px 16px;
}

article.legal h1 { margin-bottom: 4px; }
article.legal .updated { color: var(--text-dim); font-size: 0.85rem; margin-top: 0; margin-bottom: 32px; }
article.legal h2 { margin-top: 36px; font-size: 1.2rem; }
article.legal p, article.legal li { color: var(--text-dim); }

@media (max-width: 640px) {
  nav.main-nav ul { gap: 14px; }
  .hero { padding: 48px 0 28px; }
}