:root {
  --bg: #f7f8f4;
  --panel: #ffffff;
  --ink: #1f2933;
  --muted: #52606d;
  --brand: #0f766e;
  --brand-strong: #115e59;
  --border: #dce2e8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 20% -10%, #d7f5ea 0, transparent 40%),
    radial-gradient(circle at 90% 0%, #dff5ff 0, transparent 35%),
    var(--bg);
  color: var(--ink);
  min-height: 100vh;
}

header {
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.92);
  position: sticky;
  top: 0;
  backdrop-filter: blur(6px);
}

.wrap {
  width: min(960px, 92vw);
  margin: 0 auto;
}

nav {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding: 0.9rem 0;
}

nav a {
  text-decoration: none;
  color: var(--ink);
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  border: 1px solid transparent;
}

nav a:hover {
  border-color: var(--border);
  background: #fff;
}

nav a.active {
  background: var(--brand);
  color: #fff;
}

main {
  padding: 3rem 0 4rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.25rem;
  margin-bottom: 1rem;
  box-shadow: 0 8px 24px rgba(30, 41, 59, 0.05);
}

h1 {
  margin-top: 0;
  line-height: 1.1;
}

p {
  color: var(--muted);
  line-height: 1.6;
}

.code {
  background: #f2f5f7;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.6rem 0.8rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  color: #23303b;
  display: inline-block;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.tag {
  display: inline-block;
  font-size: 0.8rem;
  background: #e6fffa;
  color: #115e59;
  border: 1px solid #a7f3d0;
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
}