:root {
  color-scheme: light dark;
  --bg: #f6f2ec;
  --surface: #fffaf4;
  --text: #17202d;
  --muted: #667085;
  --line: #ded7cd;
  --accent: #c73605;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.75;
}

main {
  width: min(720px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 80px;
}

.brand {
  display: inline-block;
  margin-bottom: 30px;
  color: var(--accent);
  font-size: 18px;
  font-weight: 800;
  text-decoration: none;
}

h1 { margin: 0; font-size: clamp(28px, 7vw, 42px); line-height: 1.25; }
h2 { margin: 36px 0 10px; font-size: 20px; }
p, li { font-size: 15px; }
.lead, .updated { color: var(--muted); }
.updated { margin-top: 8px; font-size: 13px; }

section, .panel {
  margin-top: 24px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
}

section h2 { margin-top: 0; }
ul, ol { padding-left: 1.4em; }
a { color: var(--accent); }
.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 12px;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--accent);
  color: white;
  font-weight: 750;
  text-decoration: none;
}

footer { margin-top: 36px; color: var(--muted); font-size: 13px; }

@media (prefers-color-scheme: dark) {
  :root { --bg: #0b1220; --surface: #111c2c; --text: #f7f8fa; --muted: #a7b0bf; --line: #2c384a; --accent: #ff6a33; }
}