:root {
  --bg: #122018;
  --ink: #e8f0e9;
  --muted: #9bb0a0;
  --card: #1a2c22;
  --line: #2d4436;
  --accent: #e3a23a;
  --accent-2: #6ec4a0;
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.35);
  --radius: 12px;
  --font: "IBM Plex Sans", system-ui, sans-serif;
  --display: "Syne", system-ui, sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(900px 420px at 0% 0%, rgba(110, 196, 160, 0.16), transparent 55%),
    radial-gradient(700px 380px at 100% 10%, rgba(227, 162, 58, 0.12), transparent 50%),
    linear-gradient(180deg, #0e1a14 0%, var(--bg) 40%, #0c1611 100%);
  line-height: 1.55;
  min-height: 100vh;
}
a { color: var(--accent-2); text-underline-offset: 3px; }
a:hover { color: #9ee0c2; }
.wrap { width: min(1040px, calc(100% - 2rem)); margin-inline: auto; }

.site-header {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(14, 26, 20, 0.86);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 68px; gap: 1rem;
}
.logo {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.03em;
}
.nav { display: flex; gap: 1.1rem; flex-wrap: wrap; }
.nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.92rem;
}
.nav a[aria-current="page"],
.nav a:hover { color: var(--ink); }

.hero { padding: 3.2rem 0 2.2rem; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 1.6rem;
  align-items: stretch;
}
.eyebrow {
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.28rem 0.55rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: var(--accent);
  margin: 0 0 0.9rem;
}
.hero h1 {
  font-family: var(--display);
  font-size: clamp(2.5rem, 5.5vw, 3.7rem);
  line-height: 0.98;
  margin: 0 0 0.9rem;
  letter-spacing: -0.04em;
}
.lede {
  font-size: 1.08rem;
  color: var(--muted);
  max-width: 36rem;
  margin: 0 0 1.4rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-bottom: 1.3rem; }
.meta-row {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-wrap: wrap; gap: 0.45rem;
}
.meta-row li {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.32rem 0.7rem;
  font-size: 0.84rem;
  color: var(--muted);
}

.hero-card {
  background: linear-gradient(165deg, #20362a, #17261e);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.4rem;
}
.hero-card .kicker {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin: 0 0 0.6rem;
}
.hero-card .big {
  font-family: var(--display);
  font-size: 3rem;
  line-height: 1;
  margin: 0 0 0.35rem;
}
.hero-card .sub { margin: 0 0 1rem; color: var(--muted); font-size: 0.9rem; }
.score-breakdown { margin: 0; display: grid; gap: 0.45rem; }
.score-breakdown > div {
  display: flex; justify-content: space-between;
  border-top: 1px solid var(--line);
  padding-top: 0.45rem;
  font-size: 0.92rem;
}
.score-breakdown dt { color: var(--muted); }
.score-breakdown dd { margin: 0; font-weight: 700; color: var(--accent-2); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 8px;
  padding: 0.78rem 1.15rem;
  font-weight: 600;
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  font: inherit;
}
.btn-primary { background: var(--accent); color: #1a1408; }
.btn-primary:hover { background: #efb552; color: #1a1408; }
.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--accent-2); color: #fff; }

.section { padding: 2.4rem 0; }
.section-muted {
  background: rgba(0, 0, 0, 0.18);
  border-block: 1px solid var(--line);
}
.section-title {
  font-family: var(--display);
  margin: 0 0 1.15rem;
  font-size: 1.65rem;
  letter-spacing: -0.03em;
}
.prose h2 {
  font-family: var(--display);
  font-size: 1.4rem;
  margin-top: 1.9rem;
  letter-spacing: -0.02em;
}
.prose h2:first-child { margin-top: 0; }
.prose p, .prose li { color: #c5d5c9; }
.steps { padding-left: 1.2rem; }
.steps li { margin-bottom: 0.5rem; }
.callout {
  margin-top: 1.8rem;
  padding: 1.25rem 1.35rem;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(110, 196, 160, 0.12), rgba(227, 162, 58, 0.1));
  border: 1px solid var(--line);
}
.callout h3 { margin-top: 0; font-family: var(--display); }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.9rem;
}
.feature-grid article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1rem;
}
.feature-grid h3 {
  margin: 0 0 0.4rem;
  font-size: 1.02rem;
  font-family: var(--display);
}
.feature-grid p { margin: 0; color: var(--muted); font-size: 0.9rem; }

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.4rem 0 2rem;
  margin-top: 1rem;
}
.footer-inner {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  color: var(--muted); font-size: 0.88rem;
}
.footer-inner nav { display: flex; gap: 1rem; }
.footer-inner a { color: var(--muted); text-decoration: none; }
.footer-inner a:hover { color: var(--ink); }

.play-page { padding: 2rem 0 3rem; }
.play-intro h1 {
  font-family: var(--display);
  margin: 0 0 0.5rem;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  letter-spacing: -0.03em;
}
.play-intro p { color: var(--muted); max-width: 44rem; }
.game-shell {
  position: relative;
  margin: 1.25rem 0 1rem;
  background: #0a1510;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.game-hud {
  display: flex; gap: 1.2rem; flex-wrap: wrap;
  padding: 0.75rem 1rem;
  color: #d5e6da;
  font-size: 0.9rem;
  background: rgba(255,255,255,0.03);
}
#game {
  display: block;
  width: 100%;
  height: auto;
  max-height: 72vh;
  background: #08120d;
  touch-action: manipulation;
}
.game-overlay {
  position: absolute;
  inset: 42px 0 0;
  display: grid;
  place-content: center;
  gap: 0.55rem;
  text-align: center;
  background: rgba(8, 18, 13, 0.78);
  color: #fff;
  padding: 1rem;
}
.game-overlay.hidden { display: none !important; }
.overlay-title { font-family: var(--display); font-size: 2rem; margin: 0; }
.overlay-text { margin: 0 0 0.35rem; color: #bdd0c3; }
.play-note { color: var(--muted); font-size: 0.9rem; }
.controls-row {
  display: flex; flex-wrap: wrap; gap: 0.6rem;
  margin: 0.75rem 0 0;
}
.controls-row .btn { font-size: 0.9rem; padding: 0.55rem 0.9rem; }

@media (max-width: 860px) {
  .hero-grid,
  .feature-grid { grid-template-columns: 1fr; }
}