:root {
  --ink: #1a2a32;
  --muted: #5c6b72;
  --paper: #f6f1e8;
  --card: #fffdf8;
  --sea: #1b4b5a;
  --sand: #c9a36a;
  --line: #e4d8c4;
  --err: #8a3b32;
  font-family: "Source Serif 4", "Georgia", serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
}
a { color: var(--sea); }
header, main, footer { max-width: 920px; margin: 0 auto; padding: 1.25rem 1.25rem; }
header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; font-size: 0.92rem; }
nav a { margin-left: 1rem; text-decoration: none; font-size: 0.95rem; }
.langs { margin-left: 1.15rem; font-size: 0.8rem; letter-spacing: 0.06em; }
.langs button {
  background: none;
  border: 0;
  padding: 0;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
}
.langs button.is-on { color: var(--sea); font-weight: 600; }
.hero {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 2rem 1.5rem;
  margin: 1.5rem 0;
}
h1 { font-size: 2rem; margin: 0 0 0.5rem; }
.lede { color: var(--muted); max-width: 40rem; }
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 1rem 1.1rem;
}
.card h2 { margin-top: 0; font-size: 1.15rem; }
.note { font-size: 0.9rem; color: var(--muted); }
button, .btn {
  background: var(--sea);
  color: #f6f1e8;
  border: 0;
  padding: 0.55rem 1rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
label { display: block; margin: 0.85rem 0 0.25rem; font-size: 0.92rem; }
input {
  width: 100%;
  max-width: 22rem;
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--line);
  background: #fff;
}
.err { color: var(--err); display: none; margin-top: 0.75rem; }
.err.show { display: block; }
footer { color: var(--muted); font-size: 0.85rem; border-top: 1px solid var(--line); }
.accent { height: 4px; background: linear-gradient(90deg, var(--sea), var(--sand)); }