:root {
  color-scheme: light dark;
  --background: #f5f7fb;
  --surface: #ffffff;
  --text: #172033;
  --muted: #5d6678;
  --accent: #2367d1;
  --accent-strong: #174c9f;
  --border: #dce2ec;
  --focus: #ffbf47;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  line-height: 1.65;
}

a { color: var(--accent); text-underline-offset: 0.16em; }
a:hover { color: var(--accent-strong); }
a:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 2px; }

header, main, footer { width: min(100% - 2rem, 74rem); margin-inline: auto; }

header { padding: 1.25rem 0 0; }

.brand { color: var(--text); font-size: 1.2rem; font-weight: 750; text-decoration: none; }

nav, .languages { display: flex; flex-wrap: wrap; gap: .6rem 1rem; margin-top: .8rem; }
nav a[aria-current="page"] { color: var(--text); font-weight: 700; text-decoration-thickness: .15em; }

main { padding: 2.5rem 0 4rem; }

.hero, .panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  box-shadow: 0 .5rem 2rem rgba(20, 38, 70, .07);
}

.hero { padding: clamp(1.5rem, 5vw, 4rem); }
.panel { padding: clamp(1.25rem, 3vw, 2.2rem); margin-top: 1.25rem; }

h1, h2, h3 { line-height: 1.22; }
h1 { font-size: clamp(2rem, 7vw, 4rem); margin: 0 0 1rem; letter-spacing: -.035em; }
h2 { margin-top: 2.25rem; font-size: clamp(1.35rem, 3vw, 1.8rem); }
h3 { margin-top: 1.5rem; }
p, li { max-width: 72ch; }
.lede { color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.25rem); }
.meta { color: var(--muted); font-size: .95rem; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 1rem; margin-top: 1.5rem; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: .85rem; padding: 1.3rem; }
.card h2 { margin-top: 0; font-size: 1.2rem; }
.button { display: inline-block; margin-top: .5rem; background: var(--accent); color: #fff; padding: .7rem 1rem; border-radius: .6rem; font-weight: 700; text-decoration: none; }
.button:hover { background: var(--accent-strong); color: #fff; }
.notice { border-left: .3rem solid var(--accent); padding-left: 1rem; }
code { overflow-wrap: anywhere; }
footer { border-top: 1px solid var(--border); padding: 1.5rem 0 2.5rem; color: var(--muted); font-size: .92rem; }

@media (prefers-color-scheme: dark) {
  :root { --background: #101521; --surface: #171e2d; --text: #edf2fb; --muted: #b4bed0; --accent: #8bb8ff; --accent-strong: #b6d2ff; --border: #344056; }
  .hero, .panel { box-shadow: none; }
  .button, .button:hover { color: #101521; }
}

@media (max-width: 32rem) {
  header, main, footer { width: min(100% - 1.25rem, 74rem); }
  main { padding-top: 1.5rem; }
}