/* Chesspy sub-pages — ambush tokens: white/ink, Cinzel wordmark, Hahmlet heads, checkerboard edge */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --bg: #fff; --sq: #F0F0ED; --ink: #111; --text: #111; --text-mid: #2E2E2C; --text-dim: #5E5E5A;
  --border: #E7E7E3; --teal: #00968C;
  --mono: Pretendard, -apple-system, system-ui, sans-serif;
  --sans: Pretendard, -apple-system, 'Apple SD Gothic Neo', system-ui, sans-serif;
  --serif: 'Hahmlet', Georgia, serif; --mark: 'Cinzel', Georgia, serif;
}
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text-mid); font-family: var(--sans); font-weight: 500; line-height: 1.7; -webkit-font-smoothing: antialiased; }
body::before {
  content: ""; display: block; height: 72px;
  background: repeating-conic-gradient(var(--sq) 0 25%, var(--bg) 0 50%) 0 0 / 48px 48px;
  -webkit-mask-image: linear-gradient(#000, transparent); mask-image: linear-gradient(#000, transparent);
}
.wrap { max-width: 720px; margin: 0 auto; padding: 0.5rem 1.25rem 5rem; }
.topnav {
  display: inline-block; margin-bottom: 2rem; padding: 6px 14px; border: 2px solid var(--ink); border-radius: 10px;
  font-size: 13px; font-weight: 700; color: var(--ink); text-decoration: none;
}
h1 { font-family: var(--serif); font-weight: 800; font-size: clamp(28px, 5.4vw, 42px); line-height: 1.15; letter-spacing: -0.02em; color: var(--ink); margin-bottom: 0.75rem; }
h1::before { content: "CHESSPY"; display: block; font-family: var(--mark); font-weight: 900; font-size: 15px; letter-spacing: 0.08em; margin-bottom: 0.9rem; }
.effective { font-size: 12px; font-weight: 700; letter-spacing: 0.08em; color: var(--text-dim); margin-bottom: 2rem; }
.intro { font-size: 16px; margin-bottom: 1rem; }
h2 {
  font-family: var(--serif); font-weight: 800; font-size: 22px; letter-spacing: -0.01em; color: var(--ink);
  margin: 2.75rem 0 1rem; padding-top: 1.25rem; border-top: 2px solid var(--ink);
}
h3 { font-size: 15px; font-weight: 700; color: var(--ink); margin: 1.5rem 0 0.4rem; }
p { font-size: 15px; margin-bottom: 0.85rem; }
ul, ol { margin: 0.5rem 0 1rem 1.3rem; }
li { font-size: 15px; margin-bottom: 0.5rem; }
li::marker { color: var(--ink); }
strong { color: var(--ink); font-weight: 700; }
a.inline { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; text-decoration-thickness: 1.5px; }
table { width: 100%; border-collapse: collapse; margin: 1rem 0 1.5rem; font-size: 14px; border: 2px solid var(--ink); }
th, td { padding: 0.65rem 0.85rem; text-align: left; vertical-align: top; border: 1px solid var(--border); }
th { font-size: 12px; font-weight: 700; color: var(--bg); background: var(--ink); border-color: var(--ink); }
.contact-box { margin: 1.5rem 0; display: flex; flex-wrap: wrap; gap: 10px; }
.contact-box a {
  display: inline-block; padding: 12px 22px; border-radius: 12px; border: 2px solid var(--ink);
  background: var(--ink); color: var(--bg); font-size: 15px; font-weight: 700; text-decoration: none;
}
footer { margin-top: 3.5rem; padding-top: 1.25rem; border-top: 1.5px solid var(--border); font-family: var(--mark); font-weight: 900; font-size: 12px; letter-spacing: 0.08em; color: var(--ink); }
footer a.inline { font-family: var(--sans); letter-spacing: 0; }
a:focus-visible { outline: 3px solid var(--teal); outline-offset: 3px; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #0C0C0C; --sq: #1A1A19; --ink: #F3F3F1; --text: #F3F3F1; --text-mid: #D8D8D4; --text-dim: #A3A39E; --border: #2E2E2C; }
}
@media (max-width: 640px) { table, th, td { font-size: 13px; } th, td { padding: 0.5rem 0.55rem; } }