/* 群馬大学医学部推薦対策塾 — igakubu.net 共通スタイル */
:root {
  --navy: #14264f;
  --navy-deep: #0d1a38;
  --crimson: #b3122a;
  --crimson-deep: #8f0d21;
  --gold: #a8843a;
  --gold-light: #e2c887;
  --sakura: #fbeef1;
  --sakura-line: #efc9d2;
  --ink: #1d2433;
  --sub: #5a6376;
  --line: #e3e6ee;
  --mist: #f4f5f8;
}
* , *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 76px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: #fff; color: var(--ink);
  font-family: "Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic","Meiryo",sans-serif;
  font-size: 16px; line-height: 1.95;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--navy); }
a:focus-visible, button:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; }
.mincho { font-family: "Hiragino Mincho ProN","Yu Mincho","YuMincho","Noto Serif JP",serif; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 740px; }

/* ヘッダー */
.site-head { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.97); border-bottom: 1px solid var(--line); }
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--navy); font-weight: 700; font-size: 17px; line-height: 1.35; }
.brand img { width: 44px; height: 44px; border-radius: 50%; flex: none; }
.nav { display: none; }
.nav a { text-decoration: none; font-size: 15px; font-weight: 700; color: var(--navy); padding: 8px 2px; border-bottom: 2px solid transparent; }
.nav a:hover { border-bottom-color: var(--gold); }
.nav .nav-cta { background: var(--crimson); color: #fff; padding: 10px 18px; border-radius: 4px; border: 0; }
.nav .nav-cta:hover { background: var(--crimson-deep); border: 0; }
@media (min-width: 900px) { .nav { display: flex; align-items: center; gap: 26px; } .brand { font-size: 19px; } }

/* ヒーロー */
.hero { background: var(--navy-deep); }
.hero-img { max-width: 1400px; margin: 0 auto; }
.hero-img img { width: 100%; }
.hero-body { background: var(--navy); color: #fff; padding: 34px 0 44px; }
.hero-body h1 { margin: 0; font-size: clamp(24px, 5vw, 38px); line-height: 1.5; letter-spacing: .03em; }
.hero-body .lead { margin: 16px 0 0; max-width: 36em; color: #dfe4f0; }
.hero-meta { margin: 22px 0 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 8px 10px; }
.hero-meta li { border: 1px solid rgba(226,200,135,.6); color: var(--gold-light); padding: 3px 14px; font-size: 14px; border-radius: 2px; }

/* ボタン */
.btn { display: inline-block; margin-top: 28px; padding: 18px 30px; min-width: min(100%, 340px); text-align: center; background: var(--crimson); color: #fff; text-decoration: none; font-weight: 700; font-size: 18px; letter-spacing: .04em; border-radius: 4px; }
.btn:hover { background: var(--crimson-deep); }
.btn-note { margin: 10px 0 0; font-size: 14px; color: var(--sub); }
.hero-body .btn-note { color: #c3cadb; }
.btn-line { display: inline-block; margin-top: 18px; padding: 12px 22px; border: 1px solid var(--navy); color: var(--navy); text-decoration: none; font-weight: 700; border-radius: 4px; }
.btn-line:hover { background: var(--navy); color: #fff; }

/* セクション */
.sec { padding: 72px 0 0; }
.sec h2 { margin: 0 0 20px; color: var(--navy); font-size: clamp(23px, 4.6vw, 32px); line-height: 1.55; letter-spacing: .02em; }
.sec h2::after { content: ""; display: block; width: 56px; height: 3px; margin-top: 14px; background: var(--gold); }
.sec h3 { margin: 30px 0 6px; color: var(--navy); font-size: 18px; line-height: 1.6; }
.sec p { margin: 0 0 1em; }
.pair { display: grid; gap: 28px; align-items: center; }
.pair figure { margin: 0; }
.pair figure img { border-radius: 4px; box-shadow: 0 10px 30px rgba(20,38,79,.16); }
@media (min-width: 860px) {
  .pair { grid-template-columns: 1fr 1fr; gap: 52px; }
  .pair.flip figure { order: 2; }
  .pair.poster { grid-template-columns: 380px 1fr; align-items: start; }
}
.figure-num { color: var(--crimson); font-weight: 700; }
.quiet { font-size: 14px; color: var(--sub); }

/* 指導内容の一覧 */
.menu { margin: 8px 0 0; padding: 0; list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; border-top: 1px solid var(--line); }
.menu li { padding: 11px 0; border-bottom: 1px solid var(--line); font-weight: 700; color: var(--navy); font-size: 15px; }
@media (min-width: 560px) { .menu li { font-size: 16px; } }

/* 方針の囲み */
.policy { margin-top: 34px; padding: 26px 24px; background: var(--sakura); border: 1px solid var(--sakura-line); }
.policy h3 { margin-top: 0; color: var(--crimson); font-size: 19px; }
.policy p:last-child { margin-bottom: 0; }

/* コース（既存ブロックと同じ見た目） */
.gsk { max-width: 880px; margin: 0 auto; }
.gsk-head { border-top: 4px solid var(--navy); padding: 28px 0 8px; }
.gsk-deadline { display: inline-block; background: var(--crimson); color: #fff; font-size: 14px; font-weight: 700; padding: 3px 14px; letter-spacing: .04em; }
.gsk-title { margin: 14px 0 6px; font-size: clamp(26px, 5vw, 38px); font-weight: 700; color: var(--navy); line-height: 1.35; letter-spacing: .02em; }
.gsk-lead { margin: 0; font-size: clamp(17px, 3.2vw, 21px); }
.gsk-lead strong { color: var(--crimson); font-size: 1.25em; }
.gsk-time { margin: 34px 0 10px; }
.gsk-bar { display: flex; height: 54px; border-radius: 4px; overflow: hidden; }
.gsk-seg { display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; font-size: 15px; white-space: nowrap; }
.gsk-seg-tel { flex: 8 1 0; background: var(--crimson); min-width: 52px; }
.gsk-seg-work { flex: 52 1 0; background: var(--navy); letter-spacing: .08em; }
.gsk-ticks { display: flex; margin-top: 6px; font-size: 13px; color: var(--sub); font-variant-numeric: tabular-nums; }
.gsk-tick-tel { flex: 8 1 0; min-width: 52px; }
.gsk-tick-work { flex: 52 1 0; display: flex; justify-content: space-between; }
.gsk-tick-end { text-align: right; }
.gsk-ticks-note { margin: 2px 0 0; font-size: 13px; color: var(--sub); }
.gsk-steps { list-style: none; margin: 26px 0 0; padding: 0; }
.gsk-steps li { display: grid; grid-template-columns: 44px 1fr; gap: 4px 14px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.gsk-steps li:first-child { border-top: 1px solid var(--line); }
.gsk-num { grid-row: span 2; width: 44px; height: 44px; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; font-size: 18px; }
.gsk-num-tel { background: var(--crimson); }
.gsk-num-work { background: var(--navy); }
.gsk-step-name { margin: 0; font-size: 18px; font-weight: 700; color: var(--navy); }
.gsk-step-name span { font-weight: 400; font-size: 15px; color: var(--sub); margin-left: 6px; }
.gsk-step-text { margin: 0; }
.gsk-plus { margin: 26px 0 0; padding: 20px 22px; background: var(--sakura); border: 1px solid var(--sakura-line); }
.gsk-plus-title { margin: 0 0 8px; font-weight: 700; color: var(--crimson); }
.gsk-plus ul { margin: 0; padding-left: 1.2em; }
.gsk-plus li + li { margin-top: 4px; }
.gsk-spec { margin: 30px 0 0; display: grid; grid-template-columns: 5.5em 1fr; border-top: 2px solid var(--navy); }
.gsk-spec dt, .gsk-spec dd { margin: 0; padding: 14px 0; border-bottom: 1px solid var(--line); }
.gsk-spec dt { font-weight: 700; color: var(--navy); }
.gsk-spec dd small { display: block; color: var(--sub); font-size: 14px; }
.gsk-result { color: var(--crimson); font-weight: 700; }
.gsk-cta { margin: 8px 0 0; text-align: center; }
@media (max-width: 520px) {
  .gsk-seg { font-size: 13px; }
  .gsk-seg-tel, .gsk-tick-tel { min-width: 44px; }
  .gsk-ticks { font-size: 12px; }
  .gsk-spec { grid-template-columns: 4.5em 1fr; }
}

/* 講師 */
.teacher-banner img { width: 100%; border-radius: 4px; }
.facts { margin: 8px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.facts li { display: grid; grid-template-columns: 7.5em 1fr; gap: 12px; padding: 15px 0; border-bottom: 1px solid var(--line); }
.facts b { color: var(--navy); }

/* 最後の呼びかけ */
.cta { margin: 80px 0 0; background: var(--navy); color: #fff; padding: 56px 0 62px; text-align: center; }
.cta h2 { margin: 0 0 10px; font-size: clamp(23px, 4.6vw, 32px); line-height: 1.55; }
.cta p { margin: 0 auto; max-width: 34em; color: #dfe4f0; }
.cta .btn-note { color: #c3cadb; }

/* フッター */
.site-foot { padding: 34px 20px 110px; text-align: center; font-size: 14px; color: var(--sub); }
.site-foot nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 22px; margin-bottom: 18px; }
.site-foot a { white-space: nowrap; }
.site-foot p { margin: 0; }
@media (min-width: 900px) { .site-foot { padding-bottom: 48px; } }

/* スマホ下部の固定ボタン */
.dock { position: fixed; left: 0; right: 0; bottom: 0; z-index: 30; padding: 10px 14px calc(10px + env(safe-area-inset-bottom, 0px)); background: rgba(255,255,255,.97); border-top: 1px solid var(--line); }
.dock a { display: block; text-align: center; padding: 14px; background: var(--crimson); color: #fff; font-weight: 700; text-decoration: none; border-radius: 4px; letter-spacing: .04em; }
@media (min-width: 900px) { .dock { display: none; } }

/* 下層ページの見出し帯 */
.page-head { background: var(--navy); color: #fff; padding: 46px 0 50px; }
.page-head h1 { margin: 0; font-size: clamp(26px, 5.4vw, 40px); line-height: 1.45; letter-spacing: .03em; }
.page-head p { margin: 12px 0 0; color: #dfe4f0; }

/* 見出しの改行は、画面が広いときだけ */
.pc-br { display: none; }
@media (min-width: 700px) { .pc-br { display: inline; } }

/* 規約ページの本文 */
.doc { padding-top: 44px; padding-bottom: 20px; }
.doc h2 { margin: 44px 0 12px; padding-bottom: 8px; border-bottom: 2px solid var(--navy); color: var(--navy); font-size: 20px; line-height: 1.6; }
.doc h2:first-child { margin-top: 0; }
.doc h3 { margin: 26px 0 8px; color: var(--navy); font-size: 17px; }
.doc p { margin: 0 0 1em; }
.doc ul { margin: 0 0 1.2em; padding-left: 1.3em; }
.doc li + li { margin-top: 6px; }
.doc a { word-break: break-all; }
.site-foot nav + nav { font-size: 13px; }

/* 実績・推薦・コース一覧 */
.narrow-text { max-width: 40em; }
.trio { display: grid; gap: 18px; margin-top: 26px; }
.trio figure, .duo figure, .banners a { margin: 0; }
.trio img, .duo img, .banners img, .stack img { width: 100%; border-radius: 4px; box-shadow: 0 10px 30px rgba(20,38,79,.16); }
@media (min-width: 760px) { .trio { grid-template-columns: repeat(3, 1fr); gap: 24px; } }
.duo { display: grid; gap: 40px; margin-top: 28px; }
@media (min-width: 760px) { .duo { grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; } }
.rec h3 { margin: 20px 0 6px; font-size: 19px; }
.rec p { margin: 0; }
.cards { display: grid; gap: 14px; margin-top: 26px; }
@media (min-width: 760px) { .cards { grid-template-columns: repeat(3, 1fr); gap: 20px; } }
.card { display: block; padding: 24px 22px 22px; border: 1px solid var(--line); border-top: 4px solid var(--navy); text-decoration: none; color: var(--ink); background: #fff; }
.card:hover { border-top-color: var(--crimson); background: var(--mist); }
.card b { display: block; color: var(--navy); font-size: 24px; line-height: 1.4; }
.card span { display: block; font-weight: 700; margin-top: 2px; }
.card small { display: block; margin-top: 10px; color: var(--sub); font-size: 14px; line-height: 1.7; }
.banners { display: grid; gap: 18px; margin-top: 24px; }
@media (min-width: 900px) { .banners { grid-template-columns: 1fr 1fr; gap: 24px; } }
.stack { display: grid; gap: 28px; margin-top: 26px; }
@media (min-width: 760px) { .stack.two { grid-template-columns: 1fr 1fr; align-items: start; } }
.article-hero img { width: 100%; border-radius: 4px; }
.doc .lead-box { padding: 20px 22px; background: var(--sakura); border: 1px solid var(--sakura-line); margin: 0 0 28px; }
.doc ol { margin: 0 0 1.2em; padding-left: 1.4em; }
.doc ol li + li { margin-top: 12px; }

.teacher-banner { max-width: 900px; margin: 0 auto; }