:root {
  color-scheme: light;
  --bg: #f7f8fb;
  --surface: #ffffff;
  --ink: #172033;
  --muted: #647086;
  --line: #dfe5ef;
  --accent: #0f766e;
  --accent-dark: #115e59;
  --warm: #f59e0b;
  --red: #ef4444;
  --blue: #2563eb;
  --purple: #7c3aed;
  --teal: #14b8a6;
  --yellow: #facc15;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
}

a {
  color: var(--accent-dark);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 22px 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background:
    radial-gradient(circle at 32% 34%, #ffffff 0 12%, transparent 13%),
    linear-gradient(135deg, var(--teal), var(--blue) 56%, var(--purple));
  box-shadow: 0 8px 20px rgba(15, 118, 110, 0.25);
}

nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.95rem;
  font-weight: 650;
}

nav a {
  color: var(--muted);
  text-decoration: none;
}

nav a:hover,
nav a[aria-current="page"] {
  color: var(--accent-dark);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
  align-items: center;
  gap: 56px;
  max-width: 1120px;
  min-height: calc(100vh - 180px);
  margin: 0 auto;
  padding: 44px 24px 70px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(3rem, 7vw, 6.4rem);
  line-height: 0.95;
  letter-spacing: 0;
}

.lead {
  max-width: 620px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 1.24rem;
  line-height: 1.6;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 750;
  text-decoration: none;
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #ffffff;
}

.button.secondary {
  background: var(--surface);
  color: var(--ink);
}

.game-board {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  width: min(100%, 420px);
  aspect-ratio: 1;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #edf2f7;
  box-shadow: 0 24px 70px rgba(23, 32, 51, 0.16);
}

.game-board > span {
  display: block;
  aspect-ratio: 1;
  border: 1px solid #d7dee9;
  border-radius: 8px;
  background: #ffffff;
}

.orb {
  border-radius: 999px !important;
  border: 0 !important;
  box-shadow: inset 0 8px 14px rgba(255, 255, 255, 0.45), inset 0 -12px 16px rgba(23, 32, 51, 0.18), 0 8px 18px rgba(23, 32, 51, 0.16);
}

.orb.red {
  background: var(--red);
}

.orb.teal {
  background: var(--teal);
}

.orb.yellow {
  background: var(--yellow);
}

.orb.blue {
  background: var(--blue);
}

.orb.purple {
  background: var(--purple);
}

.info-band {
  max-width: 1120px;
  margin: 0 auto 64px;
  padding: 38px 24px;
  border-top: 1px solid var(--line);
}

h2 {
  margin: 0 0 12px;
  font-size: 1.1rem;
}

.info-band p,
.document p {
  margin: 0 0 18px;
  color: var(--muted);
  line-height: 1.7;
}

.document {
  max-width: 820px;
  min-height: calc(100vh - 160px);
  margin: 0 auto;
  padding: 52px 24px 72px;
}

.document h1 {
  font-size: clamp(2.4rem, 6vw, 4.8rem);
  line-height: 1;
  margin-bottom: 12px;
}

.document h2 {
  margin-top: 34px;
  padding-top: 8px;
}

.updated {
  color: var(--accent-dark) !important;
  font-weight: 700;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 760px) {
  .site-header,
  footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    gap: 34px;
    padding-top: 24px;
  }

  .lead {
    font-size: 1.06rem;
  }

  .game-board {
    max-width: 340px;
  }

}