:root {
  --bg: #f4f1e8;
  --ink: #121722;
  --line: #2f3546;
  --surface: rgba(255, 255, 255, 0.72);
  --muted: #3f4758;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 15% 15%, #ffffff 0%, var(--bg) 54%, #e8dfc8 100%);
  line-height: 1.65;
}

.page {
  width: min(980px, 92vw);
  margin: 1rem auto 2.5rem;
}

.topbar {
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 0.8rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.topbar nav {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  font-size: 0.9rem;
}

.topbar a {
  text-decoration: none;
  color: inherit;
  border-bottom: 1px solid transparent;
}

.topbar a:hover {
  border-bottom-color: var(--ink);
}

.lang-switch {
  display: flex;
  gap: 0.4rem;
}

.lang-btn {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  padding: 0.3rem 0.55rem;
  font-family: "Chakra Petch", "Trebuchet MS", sans-serif;
  cursor: pointer;
}

.lang-btn.active {
  background: var(--ink);
  color: #fff;
}

main {
  border: 1px solid var(--line);
  background: var(--surface);
  margin-top: 1rem;
  padding: 1.2rem 1.2rem 1.8rem;
}

h1,
h2 {
  font-family: "Chakra Petch", "Trebuchet MS", sans-serif;
  line-height: 1.2;
}

h1 {
  margin: 0;
  font-size: clamp(1.6rem, 4vw, 2.6rem);
}

h2 {
  margin-top: 1.6rem;
  margin-bottom: 0.4rem;
  font-size: 1.1rem;
}

p,
li {
  color: var(--muted);
}

ul {
  margin-top: 0.4rem;
}

.meta {
  margin-top: 0.4rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.hidden {
  display: none !important;
}

footer {
  margin-top: 1rem;
  font-size: 0.86rem;
  color: var(--muted);
}

@media (max-width: 700px) {
  main {
    padding: 1rem 0.9rem 1.3rem;
  }
}