:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #5e687c;
  --line: #dce4f1;
  --surface: #ffffff;
  --canvas: #f4f7fc;
  --blue: #2463eb;
  --teal: #0b8b80;
  --purple: #5943db;
  --danger: #b42318;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 85% 0%, rgba(11, 139, 128, .13), transparent 26rem),
    radial-gradient(circle at 0% 15%, rgba(89, 67, 219, .12), transparent 25rem),
    var(--canvas);
  line-height: 1.62;
}

a { color: var(--blue); }

.shell {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

header {
  padding: 26px 0 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 850;
  font-size: 1.18rem;
}

.mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 13px;
  color: #fff;
  background: linear-gradient(135deg, var(--purple), var(--teal));
  box-shadow: 0 9px 24px rgba(64, 65, 173, .24);
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

nav a, .language {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,.72);
  color: var(--ink);
  text-decoration: none;
  font-weight: 650;
}

main { padding: 24px 0 64px; }

.hero, .card {
  border: 1px solid rgba(220, 228, 241, .9);
  border-radius: 24px;
  background: rgba(255, 255, 255, .92);
  box-shadow: 0 18px 55px rgba(33, 54, 91, .09);
}

.hero { padding: clamp(28px, 6vw, 56px); }
.card { padding: clamp(22px, 4vw, 36px); margin-top: 18px; }

.eyebrow {
  color: var(--teal);
  font-size: .8rem;
  font-weight: 850;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h1, h2, h3 { line-height: 1.18; }
h1 { margin: 10px 0 14px; font-size: clamp(2rem, 7vw, 3.6rem); }
h2 { margin: 0 0 12px; font-size: clamp(1.45rem, 4vw, 2rem); }
h3 { margin: 24px 0 8px; }
p { margin: 8px 0 14px; }
.lead { max-width: 680px; color: var(--muted); font-size: 1.08rem; }
.muted, small { color: var(--muted); }

.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 18px;
  border-radius: 13px;
  background: var(--blue);
  color: white;
  text-decoration: none;
  font-weight: 800;
}
.button.secondary { background: #edf2ff; color: #2548a7; }
.button.danger { background: var(--danger); }

.notice {
  padding: 14px 16px;
  border-left: 4px solid var(--teal);
  border-radius: 10px;
  background: #edfafa;
}

ol, ul { padding-left: 1.35rem; }
li + li { margin-top: 7px; }

footer {
  padding: 0 0 40px;
  color: var(--muted);
  font-size: .9rem;
}

@media (min-width: 720px) {
  header .shell { display: flex; align-items: center; justify-content: space-between; }
  nav { margin-top: 0; }
}