:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --text: #16202e;
  --muted: #5a6577;
  --border: #e3e7ee;
  --accent: #0f766e;
  --accent-2: #1e3a8a;
  --highlight: #fbbf24;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e141c;
    --surface: #151d28;
    --text: #e8edf4;
    --muted: #9aa6b8;
    --border: #253041;
    --accent: #2dd4bf;
    --accent-2: #93c5fd;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
}
a { color: var(--accent); }
a:hover { color: var(--accent-2); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }

header.site {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
header.site .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding-top: 14px; padding-bottom: 14px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); font-weight: 600; }
.brand img { width: 36px; height: 36px; border-radius: 9px; }
nav a { margin-left: 18px; text-decoration: none; color: var(--muted); font-size: 15px; }
nav a:first-child { margin-left: 0; }
nav a:hover, nav a[aria-current="page"] { color: var(--text); }

main { padding: 48px 0 64px; }
.hero { display: flex; gap: 28px; align-items: center; margin-bottom: 40px; flex-wrap: wrap; }
.hero img { width: 112px; height: 112px; border-radius: 26px; flex: none; }
.hero h1 { margin: 0 0 6px; font-size: clamp(28px, 6vw, 40px); line-height: 1.15; letter-spacing: -0.01em; }
.hero p { margin: 0; color: var(--muted); font-size: 18px; }

h1 { font-size: clamp(26px, 5vw, 34px); line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 20px; margin: 36px 0 10px; }
p, li { color: var(--text); }
.muted { color: var(--muted); }
ul { padding-left: 22px; }
li { margin: 6px 0; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 22px;
  margin: 18px 0;
}
.card h2 { margin-top: 0; }
.notice { border-left: 4px solid var(--highlight); }

footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 40px;
  color: var(--muted);
  font-size: 14px;
}
footer a { color: var(--muted); }