:root {
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --bg: #EEF2F0;
  --surface: #FAFCFB;
  --ink: #13201C;
  --ink-2: #506560;
  --line: #D3DDD9;
  --accent: #0C6A5A;
  --accent-ink: #FFFFFF;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0E1513;
    --surface: #151E1B;
    --ink: #E4EDEA;
    --ink-2: #93A8A2;
    --line: #26332F;
    --accent: #4DC2AB;
    --accent-ink: #07201B;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.45;
  padding-block: 24px;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
.page {
  width: 100%;
  max-width: 420px;
  display: grid;
  gap: 8px;
  justify-items: center;
  text-align: center;
}
h1 {
  margin: 0 0 20px;
  font-size: clamp(28px, 7vw, 40px);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
.links { display: grid; gap: 12px; width: 100%; }
.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 20px;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
  transition: filter .15s;
}
.btn.secondary {
  background: transparent;
  color: var(--ink);
  box-shadow: inset 0 0 0 2px var(--line);
}
.btn:hover { filter: brightness(1.08); }
.btn.secondary:hover { filter: none; box-shadow: inset 0 0 0 2px var(--ink-2); }
.btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}