:root {
  --bg: #ffffff;
  --text: #16181d;
  --muted: #5b6270;
  --line: #e3e6eb;
  --accent: #0b5cad;
  --accent-text: #ffffff;
  --card: #f6f7f9;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317;
    --text: #eceef2;
    --muted: #a3aab6;
    --line: #2a2e36;
    --accent: #5aa2f0;
    --accent-text: #0b0d10;
    --card: #1a1d23;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 0 16px; }
header { border-bottom: 1px solid var(--line); }
header .wrap { display: flex; justify-content: space-between; align-items: center; padding-top: 14px; padding-bottom: 14px; }
.brand { font-weight: 700; color: var(--text); text-decoration: none; font-size: 19px; }
nav a { color: var(--muted); text-decoration: none; margin-left: 18px; }
nav a:hover, nav a[aria-current] { color: var(--text); }
main { padding: 32px 0 48px; }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 16px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
p { margin: 0 0 12px; }
.muted { color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 20px; margin-top: 20px; }
.btn {
  display: inline-block; background: var(--accent); color: var(--accent-text);
  border: 0; border-radius: 8px; padding: 10px 18px; font: inherit; font-weight: 600;
  text-decoration: none; cursor: pointer;
}
label { display: block; font-weight: 600; margin: 14px 0 4px; }
input, textarea {
  width: 100%; padding: 10px; font: inherit; color: var(--text);
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
}
textarea { min-height: 140px; resize: vertical; }
.hp { position: absolute; left: -9999px; }
footer { border-top: 1px solid var(--line); padding: 20px 0; font-size: 14px; }
footer a { color: var(--muted); }