/* ROUTEGRAL ブランドホームの最小スタイル。
   色は既存の暫定ビジュアル（濃紺・白・ティール）に合わせてある。
   ⚠️ 見た目の作り込みは Codex 側で行う前提。ここでは読めること・崩れないことだけを担保する。 */

:root {
  color-scheme: light;
  --ink: #172b3d;
  --ink-soft: #4a6076;
  --navy: #153049;
  --teal: #007d6a;
  --line: #d9e2e8;
  --bg: #f7f9fb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
  line-height: 1.85;
}

.site-header { background: var(--navy); }
.site-header__inner,
.site-footer__inner,
.home { width: min(100% - 32px, 820px); margin-inline: auto; }
.site-header__inner { display: flex; align-items: center; min-height: 60px; }

.site-brand {
  display: inline-flex; align-items: center; gap: 10px;
  min-height: 44px; color: #fff; font-weight: 700;
  letter-spacing: .08em; text-decoration: none;
}
.site-brand__mark {
  display: inline-grid; place-items: center;
  width: 26px; height: 26px; border-radius: 8px;
  background: #fff; color: var(--teal); font-size: 15px;
}

.home { padding: 40px 0 72px; }

.home-hero { padding: 24px 0 8px; border-bottom: 1px solid var(--line); }
.home-hero h1 { margin: 0; font-size: clamp(2rem, 8vw, 2.8rem); letter-spacing: .1em; }
.home-hero__reading { margin: 4px 0 18px; color: var(--ink-soft); font-size: .95rem; letter-spacing: .12em; }
.home-hero__copy { margin: 0 0 28px; font-size: clamp(1.05rem, 4.2vw, 1.3rem); font-weight: 700; color: var(--navy); }

.home-section { margin-top: 40px; }
.home-section h2 {
  margin: 0 0 12px; font-size: 1.2rem;
  padding-left: 12px; border-left: 4px solid var(--teal);
}
.home-section p { margin: 0 0 12px; }

.home-cards { display: grid; gap: 16px; margin-top: 18px; }
.home-card {
  padding: 20px; border: 1px solid var(--line); border-radius: 14px;
  background: #fff; box-shadow: 0 10px 30px rgba(16, 43, 67, .05);
}
.home-card h3 { margin: 0 0 8px; font-size: 1.05rem; }
.home-card p { margin: 0 0 14px; color: var(--ink-soft); }
.home-card__link {
  display: inline-flex; align-items: center; min-height: 44px;
  color: var(--teal); font-weight: 700; text-decoration: none;
}
.home-card__link::after { content: " →"; }
.home-card__link:hover,
.home-card__link:focus-visible { text-decoration: underline; }

.home-note { margin-top: 14px; color: var(--ink-soft); font-size: .92rem; }

.site-footer { padding: 28px 0; background: var(--navy); color: #fff; }
.site-footer__inner { letter-spacing: .1em; font-weight: 700; }

a:focus-visible,
.site-brand:focus-visible { outline: 3px solid var(--teal); outline-offset: 3px; border-radius: 6px; }

@media (min-width: 720px) {
  .home-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}