:root {
  --bg: #f6f8f7;
  --card: #ffffff;
  --ink: #14201c;
  --muted: #5b6b64;
  --accent: #0f766e;
  --line: #d7e3de;
  --max: 760px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, "Songti SC", "Noto Serif SC", Georgia, serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, #d9f3ee 0%, transparent 55%),
    radial-gradient(900px 420px at 100% 0%, #e8f1ff 0%, transparent 50%),
    var(--bg);
  line-height: 1.65;
}

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

.wrap {
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
  padding: 2.5rem 0 4rem;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.brand {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--ink);
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.1rem;
  font-family: ui-sans-serif, system-ui, -apple-system, sans-serif;
  font-size: 0.92rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1.6rem 1.5rem 2rem;
  box-shadow: 0 10px 30px rgba(20, 32, 28, 0.04);
}

h1 {
  margin: 0 0 0.35rem;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  line-height: 1.2;
}

.meta {
  color: var(--muted);
  font-family: ui-sans-serif, system-ui, -apple-system, sans-serif;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

h2 {
  margin: 1.75rem 0 0.55rem;
  font-size: 1.2rem;
}

p, li { font-size: 1.02rem; }
ul { padding-left: 1.2rem; }
li + li { margin-top: 0.35rem; }

.note {
  background: #eef8f5;
  border-left: 3px solid var(--accent);
  padding: 0.85rem 1rem;
  border-radius: 0 10px 10px 0;
  margin: 1rem 0 1.4rem;
  font-family: ui-sans-serif, system-ui, -apple-system, sans-serif;
  font-size: 0.92rem;
  color: #26443d;
}

.lang {
  display: flex;
  gap: 0.6rem;
  margin: 0.6rem 0 1.2rem;
  font-family: ui-sans-serif, system-ui, -apple-system, sans-serif;
  font-size: 0.88rem;
}

.lang a {
  text-decoration: none;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
}

.lang a.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.hero {
  padding: 1.2rem 0 0.4rem;
}

.hero p {
  max-width: 40rem;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

@media (min-width: 640px) {
  .grid { grid-template-columns: 1fr 1fr; }
}

.tile {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.25rem 1.2rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.tile:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(20, 32, 28, 0.07);
}

.tile h2 {
  margin: 0 0 0.4rem;
  font-size: 1.15rem;
}

.tile p {
  margin: 0;
  color: var(--muted);
  font-family: ui-sans-serif, system-ui, -apple-system, sans-serif;
  font-size: 0.92rem;
}

footer {
  margin-top: 2rem;
  color: var(--muted);
  font-family: ui-sans-serif, system-ui, -apple-system, sans-serif;
  font-size: 0.85rem;
}