/*
  たのしいサイエンス・サマースクール 共通CSS
  ----------------------------------------------------------------------
  更新担当者向け:
  - 原則、HTMLは index.html / history.html / sssXX/index.html / sssXX/photo.html の4枚だけです。
  - 配色・余白・角丸などを変えたい場合は、この :root の変数を優先して修正してください。
  - JavaScriptは使っていません。スマホ表示・ページ内ジャンプもHTML/CSSのみです。
*/
:root {
  --bg: #f5f8fc;
  --surface: #ffffff;
  --surface-soft: #f8fbff;
  --text: #142033;
  --muted: #5d6e84;
  --primary: #005bac;
  --primary-dark: #003f7d;
  --accent: #00a6b8;
  --accent-soft: #e6f8fb;
  --warm: #ffb000;
  --warm-soft: #fff6d9;
  --line: #dce4ee;
  --shadow: 0 18px 42px rgba(20, 32, 51, 0.10);
  --shadow-soft: 0 10px 26px rgba(20, 32, 51, 0.07);
  --radius-lg: 26px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  line-height: 1.75;
  background:
    radial-gradient(circle at 5% 0%, rgba(0, 166, 184, 0.16), transparent 30rem),
    radial-gradient(circle at 95% 2%, rgba(255, 176, 0, 0.18), transparent 28rem),
    var(--bg);
}
a { color: var(--primary); text-decoration-thickness: 0.08em; text-underline-offset: 0.18em; }
a:hover, a:focus-visible { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
.container { width: min(100% - 32px, var(--max)); margin-inline: auto; }
.skip-link { position: absolute; left: -999px; top: 8px; z-index: 100; background: var(--primary); color: #fff; padding: 8px 12px; border-radius: 8px; }
.skip-link:focus { left: 8px; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(220, 228, 238, 0.9);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 18px; min-height: 72px; padding: 10px 0; }
.logo { display: inline-flex; align-items: center; gap: 12px; color: var(--text); text-decoration: none; font-weight: 900; letter-spacing: 0.02em; }
.logo-mark { display: grid; place-items: center; flex: 0 0 auto; width: 42px; height: 42px; border-radius: 14px; color: #fff; font-size: 0.78rem; font-weight: 900; line-height: 1; background: linear-gradient(135deg, var(--primary), var(--accent)); box-shadow: 0 8px 20px rgba(0, 91, 172, 0.24); }
.logo small { display: block; color: var(--muted); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; }
.nav { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 6px; }
.nav a { display: inline-flex; align-items: center; min-height: 38px; padding: 6px 12px; border-radius: 999px; color: var(--text); text-decoration: none; font-size: 0.93rem; font-weight: 800; }
.nav a:hover, .nav a:focus-visible, .nav a[aria-current="page"] { background: #edf5ff; color: var(--primary-dark); }
.hero { padding: clamp(34px, 7vw, 72px) 0 30px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr); gap: 34px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin: 0 0 16px; padding: 7px 12px; border: 1px solid rgba(0, 91, 172, 0.18); border-radius: 999px; color: var(--primary-dark); font-size: 0.88rem; font-weight: 900; background: rgba(255,255,255,.78); }
h1 { margin: 0; font-size: clamp(2.05rem, 5vw, 4.3rem); line-height: 1.08; letter-spacing: -0.04em; }
h1 .line { display: block; color: var(--primary); }
.lead { max-width: 46rem; margin: 20px 0 0; color: #34445c; font-size: clamp(1.02rem, 1.8vw, 1.2rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 0 22px; border-radius: 999px; border: 1px solid transparent; font-weight: 900; text-decoration: none; text-align: center; transition: transform 150ms ease, box-shadow 150ms ease, background 150ms ease; }
.button:hover, .button:focus-visible { transform: translateY(-1px); }
.button-primary { color: #fff; background: linear-gradient(135deg, var(--primary), var(--accent)); box-shadow: 0 12px 28px rgba(0, 91, 172, 0.24); }
.button-primary:hover, .button-primary:focus-visible { color: #fff; box-shadow: 0 14px 32px rgba(0, 91, 172, 0.32); }
.button-secondary { color: var(--primary-dark); background: #fff; border-color: var(--line); }
.button-small { min-height: 42px; padding-inline: 16px; font-size: .94rem; }
.hero-panel { position: relative; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: rgba(255,255,255,0.95); box-shadow: var(--shadow); overflow: hidden; }
.hero-panel::before { content: ""; position: absolute; inset: auto -70px -70px auto; width: 190px; height: 190px; border-radius: 50%; background: radial-gradient(circle, rgba(255,176,0,.30), transparent 65%); }
.info-stack { position: relative; display: grid; gap: 12px; }
.info-item { padding: 15px 16px; border: 1px solid var(--line); border-radius: var(--radius-md); background: #fff; }
.info-item small { display: block; color: var(--muted); font-weight: 800; font-size: .78rem; letter-spacing: .05em; }
.info-item strong { display: block; margin-top: 2px; font-size: 1.06rem; }
main { padding-bottom: 60px; }
.section { margin-top: 24px; padding: clamp(22px, 4vw, 36px); border: 1px solid var(--line); border-radius: var(--radius-lg); background: rgba(255,255,255,.96); box-shadow: var(--shadow-soft); }
.section:first-child { margin-top: 12px; }
.section h2 { margin: 0 0 16px; font-size: clamp(1.38rem, 3vw, 2.05rem); line-height: 1.3; letter-spacing: -0.02em; }
.section h3 { margin: 24px 0 10px; font-size: 1.14rem; color: var(--primary-dark); }
.section p { margin: 0 0 1em; }
.section p:last-child { margin-bottom: 0; }
.section-lead { color: var(--muted); font-size: 1.03rem; }
.kv-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px; }
.kv-card { padding: 17px 16px; border: 1px solid var(--line); border-radius: var(--radius-md); background: #fff; }
.kv-card small { display: block; color: var(--muted); font-weight: 900; }
.kv-card strong { display: block; margin-top: 2px; color: var(--primary-dark); font-size: 1.08rem; line-height: 1.45; }
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.card { display: block; min-height: 100%; padding: 18px; border: 1px solid var(--line); border-radius: var(--radius-md); background: #fff; color: var(--text); text-decoration: none; }
.card:hover, .card:focus-visible { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(20,32,51,.08); }
.card strong { display: block; color: var(--primary-dark); font-size: 1.04rem; }
.card small { display: block; margin-top: 4px; color: var(--muted); line-height: 1.6; }
.card .tag { display: inline-flex; margin-bottom: 10px; padding: 4px 9px; border-radius: 999px; background: var(--accent-soft); color: var(--primary-dark); font-size: .78rem; font-weight: 900; }
.anchor-nav-wrap { position: sticky; top: 72px; z-index: 15; border-block: 1px solid rgba(220,228,238,.9); background: rgba(246,248,252,.92); backdrop-filter: blur(12px); }
.anchor-nav { display: flex; gap: 8px; overflow-x: auto; padding: 10px 0; scrollbar-width: thin; }
.anchor-nav a { flex: 0 0 auto; display: inline-flex; align-items: center; justify-content: center; min-height: 40px; padding: 0 14px; border: 1px solid var(--line); border-radius: 999px; background: #fff; color: var(--text); text-decoration: none; font-weight: 850; font-size: .92rem; white-space: nowrap; }
.anchor-nav a:hover, .anchor-nav a:focus-visible { background: #edf5ff; color: var(--primary-dark); }
.news-list { padding-left: 1.15rem; margin: 0; }
.news-list li { margin: 0 0 .65em; }
.data-list { display: grid; grid-template-columns: 12em minmax(0, 1fr); gap: 10px 16px; }
.data-list dt { font-weight: 900; color: var(--primary-dark); }
.data-list dd { margin: 0; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-md); background: #fff; }
table { width: 100%; min-width: 620px; border-collapse: collapse; }
th, td { padding: 12px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: #edf6ff; color: var(--primary-dark); font-weight: 900; }
tr:last-child td { border-bottom: 0; }
.note { padding: 14px 16px; border-radius: var(--radius-md); background: var(--warm-soft); border: 1px solid #f1d58b; color: #604600; }
.status { display: inline-flex; align-items: center; min-height: 30px; padding: 3px 10px; border-radius: 999px; font-size: .84rem; font-weight: 900; }
.status-open { color: #005b3c; background: #def7ec; }
.status-closed { color: #665000; background: #fff2be; }
.staff-list { display: grid; gap: 0; border-top: 1px solid var(--line); }
.staff-item { display: grid; grid-template-columns: 8em minmax(0,1fr); gap: 12px; padding: 11px 0; border-bottom: 1px solid var(--line); }
.staff-role { color: var(--primary-dark); font-weight: 900; }
.photo-section-nav { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.photo-section-nav a { display: inline-flex; min-height: 38px; align-items: center; padding: 0 12px; border-radius: 999px; border: 1px solid var(--line); background: #fff; color: var(--text); text-decoration: none; font-weight: 850; font-size: .9rem; }
.photo-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.photo-grid figure { margin: 0; border: 1px solid var(--line); border-radius: var(--radius-md); overflow: hidden; background: #fff; }
.photo-grid img { width: 100%; aspect-ratio: 4/3; object-fit: cover; background: #edf2f7; }
.photo-placeholder { display: grid; place-items: center; width: 100%; aspect-ratio: 4/3; padding: 18px; background: linear-gradient(135deg, #edf6ff, #f8fbff); color: var(--muted); text-align: center; font-weight: 800; }
.photo-grid figcaption { padding: 10px 12px; color: var(--muted); font-size: .9rem; }
.footer { padding: 28px 0 38px; color: var(--muted); border-top: 1px solid var(--line); background: rgba(255,255,255,.74); }
.footer p { margin: 0; font-size: .92rem; }
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .kv-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .card-grid, .photo-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .container { width: min(100% - 24px, var(--max)); }
  .header-inner { align-items: flex-start; flex-direction: column; gap: 10px; min-height: auto; padding: 12px 0; }
  .nav { justify-content: flex-start; overflow-x: auto; flex-wrap: nowrap; width: 100%; padding-bottom: 3px; }
  .nav a { flex: 0 0 auto; min-height: 40px; }
  .anchor-nav-wrap { top: 98px; }
  .hero { padding-top: 30px; }
  .hero-actions .button { width: 100%; }
  .hero-panel { padding: 18px; }
  .section { margin-top: 18px; }
  .kv-grid, .card-grid, .photo-grid { grid-template-columns: 1fr; }
  .data-list, .staff-item { grid-template-columns: 1fr; gap: 3px; }
  table { min-width: 540px; }
}
@media (max-width: 430px) {
  h1 { font-size: 2rem; }
  .anchor-nav-wrap { top: 106px; }
  .logo { font-size: .95rem; }
  .logo-mark { width: 38px; height: 38px; }
}