:root {
  color-scheme: light;
  --bg: #f7faf8;
  --bg-2: #eaf4ef;
  --surface: rgba(255, 255, 255, .78);
  --surface-strong: rgba(255, 255, 255, .94);
  --surface-soft: rgba(13, 148, 136, .06);
  --text: #12221f;
  --muted: #66736f;
  --faint: #96a09d;
  --border: rgba(18, 34, 31, .105);
  --border-strong: rgba(18, 34, 31, .17);
  --brand: #52e1cd;
  --brand-2: #20bca7;
  --brand-dark: #0a7c70;
  --brand-soft: rgba(82, 225, 205, .18);
  --p3: #6ee7a4;
  --p3-soft: rgba(110, 231, 164, .16);
  --p2: #fde68a;
  --p2-soft: rgba(253, 230, 138, .20);
  --p1: #fca5a5;
  --p1-soft: rgba(252, 165, 165, .16);
  --shadow: 0 16px 45px rgba(14, 48, 43, .10);
  --radius: 18px;
  --radius-sm: 12px;
  --max-width: 860px;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #020b0a;
  --bg-2: #061412;
  --surface: rgba(9, 24, 22, .70);
  --surface-strong: rgba(10, 27, 25, .90);
  --surface-soft: rgba(255, 255, 255, .050);
  --text: #f8fffd;
  --muted: #b7c3c0;
  --faint: #788784;
  --border: rgba(223, 255, 249, .125);
  --border-strong: rgba(223, 255, 249, .22);
  --brand: #52e1cd;
  --brand-2: #25c4af;
  --brand-dark: #61f2dc;
  --brand-soft: rgba(82, 225, 205, .18);
  --shadow: 0 24px 64px rgba(0, 0, 0, .34);
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--bg); scroll-behavior: smooth; }
body {
  min-height: 100%;
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
  color: var(--text);
  background:
    radial-gradient(circle at 10% -8%, rgba(82, 225, 205, .16), transparent 24rem),
    radial-gradient(circle at 92% 4%, rgba(10, 80, 73, .24), transparent 22rem),
    linear-gradient(145deg, var(--bg), var(--bg-2));
  background-attachment: fixed;
}

:root[data-theme="light"] body {
  background:
    radial-gradient(circle at 12% -12%, rgba(79, 216, 197, .20), transparent 24rem),
    linear-gradient(145deg, var(--bg), var(--bg-2));
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .24;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.9), transparent 75%);
}
:root[data-theme="light"] body::before { opacity: 0; }

a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button { cursor: pointer; }
img, svg { max-width: 100%; display: block; }

.skip-link {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 50;
  transform: translateY(-150%);
  padding: .7rem 1rem;
  border-radius: 999px;
  background: var(--text);
  color: var(--bg);
}
.skip-link:focus { transform: translateY(0); }
.muted { color: var(--muted); }
.stack { display: grid; gap: .85rem; }
.centered { place-items: center; text-align: center; }
.big-icon { font-size: 4rem; }