:root {
  --bg: #0d1b2a;
  --panel: #14263a;
  --ink: #eef3f8;
  --muted: #9fb3c8;
  --line: #243a52;
  --accent: #c1fb3d;
  --accent-ink: #0d1b2a;
  --radius: 14px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
html { font-size: 18px; }
body { margin: 0; font: 1rem/1.6 var(--font); color: var(--ink); background: var(--bg); }
a { color: var(--accent); }
.top { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 14px 20px; border-bottom: 1px solid var(--line); background: var(--panel); flex-wrap: wrap; }
.brand { font-weight: 800; text-decoration: none; color: var(--ink); font-size: 1.15rem; letter-spacing: -0.01em; }
.top nav { display: flex; flex-wrap: wrap; gap: 6px 18px; }
.top nav a { text-decoration: none; color: var(--muted); font-size: .95rem; }
.top nav a:hover { color: var(--accent); }
main { max-width: 960px; margin: 0 auto; padding: 24px 20px 60px; }
.hero { padding: 24px 0 12px; max-width: 760px; }
h1 { font-size: clamp(1.7rem, 4vw, 2.4rem); line-height: 1.12; margin: 0 0 12px; letter-spacing: -0.02em; }
.lead { font-size: 1.08rem; color: var(--muted); margin: 0; }
.game { margin: 20px 0 8px; }
.frame { position: relative; width: 100%; aspect-ratio: 4 / 3; max-height: 78vh; background: #000; border-radius: var(--radius); overflow: hidden; display: grid; place-items: center; margin: 0 auto; }
.frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.frame button { font: inherit; font-size: 1.1rem; padding: 14px 28px; border-radius: 12px; border: 0; cursor: pointer; }
.frame .hint { position: absolute; bottom: 12px; color: #ccc; font-size: .9rem; margin: 0; }
.frame:fullscreen { border-radius: 0; max-height: none; }
button.primary { background: var(--accent); color: var(--accent-ink); font-weight: 800; }
.gamebar { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-top: 10px; font-size: .95rem; }
.gamebar button { font: inherit; font-size: .9rem; padding: 8px 14px; border-radius: 10px; border: 1px solid var(--line); background: var(--panel); color: var(--ink); cursor: pointer; }
.small { font-size: .85rem; }
.muted { color: var(--muted); }
.notice { border: 1px solid var(--line); border-left: 4px solid var(--accent); background: var(--panel); border-radius: 10px; padding: 12px 14px; margin: 14px 0 0; font-size: .95rem; }
.block, .faq { margin-top: 36px; max-width: 820px; }
.block h2, .faq h2 { font-size: 1.4rem; margin: 0 0 10px; }
.block h3 { font-size: 1.1rem; margin: 18px 0 6px; }
.block p, .block li { margin: 0 0 10px; }
.block ul, .block ol { padding-left: 22px; }
kbd { font: .9em/1 ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--bg); border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 6px; padding: 2px 7px; }
table { border-collapse: collapse; width: 100%; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; font-size: .95rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: #102033; font-weight: 700; }
tr:last-child td { border-bottom: 0; }
details { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; margin: 8px 0; }
summary { cursor: pointer; font-weight: 600; }
details p { margin: 8px 0 2px; color: var(--muted); }
.legal { max-width: 760px; }
.foot { max-width: 960px; margin: 0 auto; padding: 24px 20px 40px; border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem; }
@media (max-width: 640px) {
  html { font-size: 17px; }
  th, td { padding: 8px; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }