/* Hotaru legal site. Palette B "Aurora + Amber" (docs/design-system.md),
   dark by default, light variant for prefers-color-scheme: light.
   System fonts only: no external requests. */
:root {
  color-scheme: dark light;
  --bg: #07090d;
  --card: #0f131a;
  --border: #1e2531;
  --text: #f2f5f8;
  --muted: #8c95a4;
  --accent: #00f0ff;
  --violet: #8b5cf6;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f7fa;
    --card: #ffffff;
    --border: #dce1e8;
    --text: #0b0f15;
    --muted: #4b5563;
    --accent: #007a8c;
    --violet: #7c3aed;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  overflow-wrap: break-word;
}

main, header.top, footer {
  width: min(820px, calc(100% - 32px));
  margin: 0 auto;
}

header.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0 0;
}

.brand {
  color: var(--accent);
  font-weight: 800;
  letter-spacing: .18em;
  font-size: 14px;
  text-decoration: none;
}

.lang {
  color: var(--muted);
  font-size: 14px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  text-decoration: none;
}

main { padding: 24px 0 48px; }

h1 {
  margin: 12px 0 24px;
  font-size: clamp(30px, 7vw, 46px);
  line-height: 1.1;
  background: linear-gradient(90deg, var(--accent), var(--violet));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

h2 { margin-top: 36px; color: var(--accent); font-size: 21px; line-height: 1.3; }
h3 { margin-top: 24px; font-size: 18px; }
p, li, address { color: var(--muted); }
strong { color: var(--text); }
a { color: var(--accent); }
ul, ol { padding-left: 22px; }
li { margin-bottom: 6px; }
address { font-style: normal; }

.notice {
  padding: 16px 18px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
}

footer {
  padding: 20px 0 40px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}

footer nav { display: flex; flex-wrap: wrap; gap: 8px 16px; }

/* Start page and 404 */
body.home main { padding-top: 12vh; }
body.home h1 { font-size: clamp(28px, 6vw, 40px); }
.sub { font-size: 18px; margin-top: -8px; }
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-top: 40px; }
.cols nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
}
.cols h2 { margin: 0 0 4px; font-size: 15px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }