/* 紹介ページ（about.html）専用。配色は style.css と同じ値を使う（外部フォントなし） */
:root {
  --bg: #FFF8EF;
  --surface: #FFFFFF;
  --text: #3B2A20;
  --text-sub: #6B5A4E;
  --primary: #8A4B2A;
  --primary-press: #6F3B20;
  --accent: #F2C27B;
  --line: #E8DCCD;
  --radius: 12px;
  color-scheme: light;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Noto Sans CJK JP", "Yu Gothic UI", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-text-size-adjust: 100%;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--primary); }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.wrap { max-width: 720px; margin: 0 auto; padding: 0 20px; }
.sub { color: var(--text-sub); font-size: 14px; }

/* 上部 */
.site-head { border-bottom: 1px solid var(--line); }
.site-head .wrap { display: flex; align-items: center; gap: 10px; min-height: 56px; padding-top: env(safe-area-inset-top); }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); font-weight: 700; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.brand-en { color: var(--text-sub); font-size: 13px; letter-spacing: .04em; }
.head-cta { margin-left: auto; font-size: 14px; font-weight: 700; text-decoration: none; }

/* ヒーロー */
.hero { padding-top: 48px; padding-bottom: 32px; text-align: center; }
.hero-icon { width: 96px; height: 96px; margin: 0 auto 20px; border-radius: 22px; }
.hero h1 { font-size: 28px; line-height: 1.45; margin: 0 0 12px; }
.hero-lead { margin: 0 auto 24px; max-width: 30em; color: var(--text-sub); }
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 52px; padding: 0 28px; border-radius: var(--radius);
  background: var(--primary); color: #fff; font-weight: 700; font-size: 17px; text-decoration: none;
}
.btn-primary:active { background: var(--primary-press); }
.hero-note { margin-top: 12px; font-size: 13px; color: var(--text-sub); }

/* 見出しと区切り */
section { padding: 32px 0; border-top: 1px solid var(--line); }
section h2 { font-size: 22px; margin: 0 0 20px; text-align: center; }
h3 { font-size: 17px; margin: 0 0 6px; }
p { margin: 0 0 10px; }

/* 3つの特長 */
.features { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.feature { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; display: flex; gap: 14px; align-items: flex-start; }
.feature-mark {
  flex: 0 0 48px; height: 48px; border-radius: 50%;
  background: var(--accent); color: var(--primary); font-weight: 700; font-size: 20px;
  display: flex; align-items: center; justify-content: center;
}
.feature p { margin: 0; color: var(--text-sub); font-size: 15px; }

/* 使い方3ステップ */
.steps { list-style: none; counter-reset: step; margin: 0; padding: 0; display: grid; gap: 12px; }
.steps li { counter-increment: step; position: relative; padding: 14px 16px 14px 60px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.steps li::before {
  content: counter(step); position: absolute; left: 14px; top: 14px;
  width: 32px; height: 32px; border-radius: 50%; background: var(--primary); color: #fff;
  font-weight: 700; display: flex; align-items: center; justify-content: center;
}
.steps p { margin: 0; color: var(--text-sub); font-size: 15px; }

/* ホーム画面に追加（図） */
.a2hs { display: grid; gap: 12px; }
.a2hs-step { display: flex; gap: 14px; align-items: center; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; }
.a2hs-fig { flex: 0 0 76px; width: 76px; height: 76px; }
.a2hs-step p { margin: 0; font-size: 15px; }
.a2hs-step b { color: var(--primary); }
.a2hs-note { margin-top: 12px; }

/* よくある質問 */
.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 10px; }
.faq summary { cursor: pointer; padding: 14px 16px; font-weight: 700; list-style: none; position: relative; padding-right: 40px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "＋"; position: absolute; right: 16px; top: 14px; color: var(--primary); }
.faq details[open] summary::after { content: "－"; }
.faq .ans { padding: 0 16px 14px; color: var(--text-sub); font-size: 15px; }
.faq .ans p:last-child { margin-bottom: 0; }

/* プライバシー */
.privacy ul { margin: 0 0 10px; padding-left: 1.3em; }
.privacy li { margin-bottom: 6px; }

/* 最後の誘導・運営者 */
.cta-end { text-align: center; }
.operator { font-size: 14px; color: var(--text-sub); }
.operator dl { display: grid; grid-template-columns: auto 1fr; gap: 4px 16px; margin: 0; }
.operator dt { font-weight: 700; color: var(--text); }
.operator dd { margin: 0; }
.site-foot { padding: 24px 0 calc(32px + env(safe-area-inset-bottom)); text-align: center; font-size: 13px; color: var(--text-sub); border-top: 1px solid var(--line); }

@media (min-width: 640px) {
  .hero h1 { font-size: 34px; }
  .features { grid-template-columns: repeat(3, 1fr); }
  .feature { flex-direction: column; }
}