:root {
  --bg: #0f172a;
  --surface: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --primary: #3b82f6;
  --accent: #10b981;
  --card: #1f2937;
  --border: #334155;
}
* { box-sizing: border-box }
html, body { height: 100% }
body {
  margin: 0;
  font-family: "Noto Sans JP", system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background: linear-gradient(180deg, var(--bg), #0b1023 40%, var(--bg) 100%);
  color: var(--text);
}
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(17,24,39,.8);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.branding {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 0;
}
.logo {
  font-weight: 700;
  letter-spacing: .02em;
}
.subtitle {
  color: var(--muted);
  font-size: 14px;
}
.nav {
  display: flex;
  gap: 16px;
  padding-bottom: 14px;
}
.nav a {
  color: var(--text);
  text-decoration: none;
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: 8px;
}
.nav a:hover {
  border-color: var(--border);
  background: #0b1328;
}
.hero {
  padding: 60px 0 40px;
  background: radial-gradient(circle at 10% 0%, rgba(59,130,246,.2), transparent 50%), radial-gradient(circle at 90% 10%, rgba(16,185,129,.15), transparent 60%);
}
.hero h1 {
  margin: 0 0 8px;
  font-size: 28px;
}
.hero p {
  margin: 0 0 20px;
  color: var(--muted);
}
.cta {
  display: flex;
  gap: 12px;
}
.button {
  display: inline-block;
  color: var(--text);
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  background: var(--card);
}
.button.primary {
  background: linear-gradient(90deg, var(--primary), #7c3aed);
  border-color: transparent;
}
.section {
  padding: 40px 0;
}
.section.alt {
  background: #0c142b;
}
.section h2 {
  margin: 0 0 16px;
  font-size: 22px;
}
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}
input[type="search"], select {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.card {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
  padding: 16px;
}
.card h3 {
  margin: 0 0 8px;
  font-size: 18px;
}
.pill {
  display: inline-block;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #0b1328;
  margin: 4px 6px 0 0;
  font-size: 12px;
  color: var(--text);
}
.desc {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}
.rank-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: rank;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.rank-item {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
  padding: 12px;
}
.rank-num {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: #0b1328;
  border: 1px solid var(--border);
  font-weight: 700;
}
.badge {
  display: inline-block;
  min-width: 28px;
  text-align: center;
  padding: 6px 8px;
  border-radius: 999px;
  font-weight: 700;
  color: #0b1023;
}
.badge.s { background: #fbbf24 }
.badge.a { background: #60a5fa }
.badge.b { background: #34d399 }
.legend {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 14px;
  align-items: center;
  margin-top: 12px;
  color: var(--muted);
}
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  background: rgba(17,24,39,.6);
}
.site-footer .links {
  display: flex;
  gap: 16px;
}
.site-footer a {
  color: var(--text);
  text-decoration: none;
}
@media (max-width: 960px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 640px) {
  .card-grid {
    grid-template-columns: 1fr;
  }
  .rank-item {
    grid-template-columns: 44px 1fr;
  }
}