:root {
  --bg: #fbf8f3;
  --surface: #ffffff;
  --ink: #1d1a24;
  --muted: #6b6574;
  --line: #ece6dc;
  --accent: #ff7a3d;
  --accent-ink: #ffffff;
  --night: #24203a;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14121c;
    --surface: #1d1a28;
    --ink: #f3eff8;
    --muted: #a49db0;
    --line: #2d2939;
    --night: #0d0b14;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.85;
  padding-inline: max(16px, env(safe-area-inset-left));
}
a { color: inherit; }
.wrap { max-width: 720px; margin: 0 auto; }

.site-header { display: flex; align-items: center; justify-content: space-between; padding-block: 20px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; text-decoration: none; }
.brand-mark {
  width: 32px; height: 32px; border-radius: 9px; display: grid; place-items: center;
  background: var(--accent); color: var(--accent-ink); font-size: 17px;
}
.site-header nav { display: flex; gap: 18px; font-size: 14px; color: var(--muted); }
.site-header nav a { text-decoration: none; }

.hero { padding-block: 48px 32px; }
.eyebrow { color: var(--accent); font-weight: 700; font-size: 14px; letter-spacing: .04em; margin: 0 0 8px; }
.hero h1 { font-size: clamp(30px, 7vw, 46px); line-height: 1.3; margin: 0 0 16px; letter-spacing: .01em; }
.lead { font-size: 18px; color: var(--muted); margin: 0 0 24px; }
.badge {
  display: inline-block; padding: 10px 18px; border-radius: 999px; background: var(--night); color: #fff;
  font-weight: 700; font-size: 15px;
}

.phone {
  margin: 40px auto 8px; max-width: 320px; background: var(--night); color: #fff; border-radius: 36px;
  padding: 28px 24px 32px; box-shadow: 0 20px 50px rgba(36, 32, 58, .25); text-align: center;
}
.phone .time { font-size: 13px; opacity: .6; margin: 0; }
.phone .alarm { font-size: 30px; font-weight: 800; margin: 12px 0 4px; }
.phone .sub { margin: 0 0 20px; opacity: .75; font-size: 14px; }
.phone .stop { display: inline-block; background: var(--accent); border-radius: 999px; padding: 8px 28px; font-weight: 700; }

section { padding-block: 28px; border-top: 1px solid var(--line); }
section h2 { font-size: 22px; margin: 0 0 16px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 18px; }
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.7; }

.prose { padding-block: 24px 40px; }
.prose h1 { font-size: 28px; line-height: 1.4; margin: 16px 0 8px; }
.prose h2 { font-size: 19px; margin: 32px 0 8px; }
.prose p, .prose li { color: var(--ink); }
.updated { color: var(--muted); font-size: 14px; }

.site-footer { border-top: 1px solid var(--line); padding-block: 24px 40px; color: var(--muted); font-size: 13px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 8px; }
.site-footer p { margin: 4px 0; }