:root {
  --desk: #2b3fe0;
  --desk-deep: #1b2796;
  --paper: #ffffff;
  --ink: #141a33;
  --ink-soft: #4a5170;
  --rule: #dce0f3;
  --hl-yellow: #ffe55c;
  --shadow-sheet: 0 2px 2px rgb(10 14 60 / 0.12), 0 28px 60px -24px rgb(10 14 60 / 0.55);
  color-scheme: light;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px 16px;
  background: var(--desk);
  color: var(--ink);
  font: 400 1.0625rem/1.6 ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}

.sheet {
  width: 100%;
  max-width: 600px;
  background: var(--paper);
  border-radius: 16px;
  padding: clamp(28px, 6vw, 48px);
  box-shadow: var(--shadow-sheet);
}

.logo { display: block; width: 220px; max-width: 100%; height: auto; margin-bottom: 32px; }

h1 {
  margin: 0 0 16px;
  font-size: clamp(1.75rem, 5vw, 2.25rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

h2 { margin: 28px 0 8px; font-size: 1.125rem; line-height: 1.3; }

mark { background: var(--hl-yellow); color: inherit; padding: 0 0.2em; border-radius: 4px; }

p, ul { margin: 0 0 14px; }
ul { padding-left: 1.25em; }
li { margin-bottom: 6px; }

a { color: var(--desk); text-underline-offset: 3px; }
a:hover { color: var(--desk-deep); }
a:focus-visible { outline: 3px solid var(--desk); outline-offset: 2px; border-radius: 2px; }

footer {
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
  color: var(--ink-soft);
  font-size: 0.9375rem;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}
footer a { color: inherit; }