/* jianghu-arena.com — the game's colours (Godot Chrome.gd): jade #0b160e, gold #debf52,
   gold ink #805208, paper #fef8e6, ink #302117, dim ink #665445. */
:root {
  --jade: #0b160e;
  --jade-2: #10261a;
  --jade-3: #23533a;
  --gold: #debf52;
  --gold-ink: #805208;
  --paper: #fef8e6;
  --paper-2: #f6e9c6;
  --ink: #302117;
  --dim: #665445;
  --cream: #f6f1e0;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  min-height: 100vh;
  background: var(--jade);
  color: var(--cream);
  font-family: system-ui, -apple-system, "Segoe UI", "Noto Sans Thai", "Leelawadee UI", "Sukhumvit Set", Roboto, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--gold); }
img { max-width: 100%; }

/* ── top bar (document pages) ─────────────────────────────────────────── */
.bar {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  max-width: 920px; margin: 0 auto; padding: 14px 16px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--cream); text-decoration: none; font-weight: 700; letter-spacing: .02em; }
.brand img { width: 44px; height: 44px; }
.bar nav a { color: var(--cream); text-decoration: none; margin-left: 18px; font-size: 15px; opacity: .85; }
.bar nav a:hover { opacity: 1; color: var(--gold); }

/* ── buttons ──────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 16px 34px; border-radius: 14px; font-size: 20px; font-weight: 700; text-decoration: none;
  color: var(--ink); background: linear-gradient(180deg, #f3dc7a 0%, var(--gold) 55%, #c9a53a 100%);
  border: 2px solid #fff3c4; box-shadow: 0 0 0 5px rgba(222, 191, 82, .22), 0 14px 32px rgba(0, 0, 0, .45);
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 0 0 7px rgba(222, 191, 82, .3), 0 18px 40px rgba(0, 0, 0, .5); }
.btn:focus-visible { outline: 3px solid #fff; outline-offset: 3px; }

/* ── landing ──────────────────────────────────────────────────────────── */
.hero {
  position: relative; min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 48px 16px 40px; text-align: center; overflow: hidden; isolation: isolate;
}
.hero::before {
  content: ""; position: absolute; inset: -30px; z-index: -2;
  background: var(--jade) url("/assets/backdrop.webp") center 30% / cover no-repeat;
  filter: blur(3px) saturate(.95); transform: scale(1.04);
}
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: radial-gradient(80% 60% at 50% 42%, rgba(11, 22, 14, .58) 0%, rgba(11, 22, 14, .84) 62%, rgba(6, 12, 8, .96) 100%);
}
.hero .logo { width: min(380px, 78vw); height: auto; filter: drop-shadow(0 18px 30px rgba(0, 0, 0, .55)); animation: float 6s ease-in-out infinite; }
.hero h1 { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.tagline { max-width: 640px; margin: 18px auto 6px; font-size: clamp(19px, 2.6vw, 24px); font-weight: 600; text-shadow: 0 2px 12px rgba(0, 0, 0, .6); }
.tagline-en { max-width: 600px; margin: 0 auto 30px; font-size: 16px; opacity: .8; text-shadow: 0 2px 10px rgba(0, 0, 0, .6); }
.note { margin-top: 16px; font-size: 13px; opacity: .7; }
.features {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px;
  max-width: 920px; margin: 0 auto; padding: 36px 16px 8px;
}
.feature {
  background: rgba(254, 248, 230, .06); border: 1px solid rgba(222, 191, 82, .28); border-radius: 16px; padding: 20px 18px;
}
.feature h2 { margin: 0 0 6px; font-size: 18px; color: var(--gold); }
.feature p { margin: 0; font-size: 15px; opacity: .85; }
.signin { max-width: 920px; margin: 8px auto 0; padding: 12px 16px 0; text-align: center; font-size: 15px; opacity: .8; }

/* ── documents (privacy / terms / data deletion) ──────────────────────── */
.paper {
  max-width: 880px; margin: 8px auto 32px; padding: 36px clamp(20px, 5vw, 56px) 40px;
  color: var(--ink); border-radius: 20px; border: 2px solid var(--gold);
  background: linear-gradient(180deg, #fffaf0 0%, var(--paper) 50%, var(--paper-2) 100%);
  box-shadow: 0 0 0 6px rgba(222, 191, 82, .14), 0 26px 70px rgba(0, 0, 0, .55);
}
.paper h1 { margin: 0 0 4px; font-size: clamp(26px, 4vw, 34px); line-height: 1.3; }
.paper h1 small { display: block; font-size: .55em; font-weight: 600; color: var(--gold-ink); }
.paper h2 { margin: 28px 0 8px; font-size: 20px; color: var(--ink); }
.paper h3 { margin: 18px 0 6px; font-size: 17px; }
.paper p, .paper li { color: #463628; font-size: 16px; }
.paper ul, .paper ol { padding-left: 22px; }
.paper li { margin: 4px 0; }
.paper a { color: var(--gold-ink); }
.paper .meta { color: var(--dim); font-size: 14px; margin: 0 0 18px; }
.paper .lead { font-size: 17px; }
.paper .box {
  margin: 16px 0; padding: 14px 18px; border-radius: 12px; background: rgba(222, 191, 82, .16); border: 1px solid rgba(128, 82, 8, .25);
}
.paper hr { border: 0; border-top: 1px dashed rgba(128, 82, 8, .4); margin: 36px 0 8px; }
.paper .lang-switch { float: right; font-size: 14px; }

/* ── footer ───────────────────────────────────────────────────────────── */
footer {
  max-width: 920px; margin: 0 auto; padding: 28px 16px 40px; text-align: center; font-size: 14px; color: rgba(246, 241, 224, .7);
}
footer nav a { color: rgba(246, 241, 224, .85); text-decoration: none; margin: 0 10px; }
footer nav a:hover { color: var(--gold); }
footer p { margin: 10px 0 0; }

@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
@media (prefers-reduced-motion: reduce) { .hero .logo { animation: none; } .btn { transition: none; } }
@media (max-width: 720px) {
  .features { grid-template-columns: 1fr; }
  .bar nav a { margin-left: 12px; }
  .btn { width: 100%; max-width: 360px; }
}