:root {
  --bg: #0f1115;
  --card: #171a21;
  --line: #272b35;
  --text: #e6e8ec;
  --muted: #9aa3b2;
  --accent: #4c8dff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}

header {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: baseline;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}

h1 { font-size: 18px; margin: 0; }
h2 { font-size: 17px; margin: 0 0 12px; }

.tag { color: var(--muted); font-size: 14px; }

main { max-width: 680px; margin: 24px auto; padding: 0 16px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 16px;
}

p { margin: 0 0 12px; }
p:last-child { margin-bottom: 0; }

.hint { color: var(--muted); font-size: 14px; }

.plain { margin: 0; padding-left: 20px; }
.plain li { margin-bottom: 10px; }
.plain li:last-child { margin-bottom: 0; }

code {
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: 13px;
  background: #0f1115;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 5px;
}

.kv { display: grid; grid-template-columns: auto 1fr; gap: 8px 14px; font-size: 14px; margin: 0 0 12px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }

.row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }

.btn {
  display: inline-block;
  padding: 10px 16px;
  background: var(--accent);
  border: 0;
  border-radius: 6px;
  color: #fff;
  font-size: 15px;
  text-decoration: none;
}

.btn.secondary { background: transparent; border: 1px solid var(--line); color: var(--text); }
.btn:hover { filter: brightness(1.1); }

footer { max-width: 680px; margin: 0 auto 32px; padding: 0 16px; color: var(--muted); font-size: 13px; }