/* 大学別 数学ページ（傾向と対策・過去問解説）。2026-10-31 Claude。
   デザイン基準：output/ynu-math-20261031/codex-design/（相棒の画像案と HANDOFF.md）。.ex 配下だけに効かせる。 */
.ex{--navy:#13294b;--ink:#1d3557;--blue:#2c5c99;--sky:#eaf2fb;--cream:#fbf7ee;--gold:#b8924a;--line:#d6e2ef;--muted:#55677d;
  color:var(--ink);background:#fff;font-family:"Noto Sans JP",sans-serif;font-size:17px;line-height:1.95;letter-spacing:.02em}
.ex *{box-sizing:border-box}
.ex :is(h1,h2,h3,p,ul,ol,table,figure,details){margin:0}
.ex :is(h2,h3,[id]){scroll-margin-top:110px}
.ex a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}
.ex a:hover{opacity:.8}
.ex a:focus-visible,.ex summary:focus-visible{outline:3px solid var(--blue);outline-offset:3px}
.ex strong{font-weight:700;color:var(--navy)}
.ex .katex{letter-spacing:0;font-size:1.08em}
.ex-wrap{width:min(1120px,calc(100% - 48px));margin:0 auto;padding:0 0 96px}
.ex-wrap>*:not(.ex-hero):not(.ex-crumb){max-width:760px;margin-inline:auto}
.ex-small{font-size:14px;line-height:1.8;color:var(--muted)}

/* パンくず・ヒーロー */
.ex-crumb{display:flex;flex-wrap:wrap;gap:4px 10px;align-items:center;padding:18px 0 10px;font-size:13px;color:var(--muted)}
.ex-crumb a{color:var(--muted);text-decoration:none;min-height:32px;display:inline-flex;align-items:center}
.ex-hero{position:relative;margin:0 calc(50% - 50vw);padding:48px max(24px,calc(50vw - 560px)) 40px;background:linear-gradient(120deg,#f6f9fd 0%,#e6effa 55%,#d7e6f6 100%)}
.ex-hero::after{content:"";position:absolute;inset:auto 0 0;height:1px;background:linear-gradient(90deg,transparent,var(--gold),transparent)}
.ex-eyebrow{color:var(--gold);font-size:15px;font-weight:700;letter-spacing:.06em}
.ex-hero h1{margin-top:8px;max-width:960px;color:var(--navy);font-family:"Noto Serif JP","Noto Sans JP",serif;font-weight:700;font-size:40px;line-height:1.4;letter-spacing:.02em}
.ex-meta{margin-top:14px;font-size:14px;line-height:1.8;color:var(--muted)}

/* 本文の段落・見出し */
.ex-lead{margin-top:40px}
.ex-lead p+p,.ex-sec p+p,.ex-sec h3+p,.ex-year p+p{margin-top:18px}
.ex-sec,.ex-year{margin-top:72px}
.ex-sec>h2,.ex-year>h2,.ex-summary>h2{position:relative;padding-left:18px;color:var(--navy);font-family:"Noto Serif JP","Noto Sans JP",serif;font-weight:700;font-size:28px;line-height:1.5;margin-bottom:24px}
.ex-sec>h2::before,.ex-year>h2::before,.ex-summary>h2::before{content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;background:var(--gold)}
.ex-sec h3{margin:36px 0 12px;font-size:20px;line-height:1.6;color:var(--navy)}
.ex-sec ul:not(.ex-cards),.ex-ans ul,.ex-key ul,.ex-note ul{padding-left:1.3em;list-style:disc}
.ex-sec ul:not(.ex-cards) li+li,.ex-key li+li,.ex-note li+li,.ex-ans li+li{margin-top:12px}
.ex-sec>ul,.ex-sec>ol,.ex-sec>.ex-small{margin-top:18px}

/* 先に結論・答えの一覧 */
.ex-summary{margin-top:40px;padding:28px 32px;background:var(--cream);border:1px solid #efe4cc;border-radius:6px}
.ex-summary>h2{padding-left:0;margin-bottom:16px}
.ex-summary>h2::before{display:none}
.ex-points{list-style:none;padding:0;counter-reset:pt}
.ex-points li{position:relative;padding:0 0 0 44px;counter-increment:pt}
.ex-points li+li{margin-top:20px;padding-top:20px;border-top:1px solid #efe4cc}
.ex-points li::before{content:counter(pt);position:absolute;left:0;top:2px;width:28px;height:28px;border-radius:50%;background:var(--gold);color:#fff;font-size:15px;font-weight:700;line-height:28px;text-align:center}
.ex-points li+li::before{top:22px}
.ex-summary .ex-table-wrap{margin-top:8px}
.ex-summary>.ex-small{margin-top:14px}

/* 目次 */
.ex-toc{margin-top:32px;padding:24px 28px;background:var(--sky);border:1px solid var(--line);border-radius:6px}
.ex-toc-title{font-family:"Noto Serif JP","Noto Sans JP",serif;font-size:22px;font-weight:700;color:var(--navy)}
.ex-toc ol{margin-top:8px;padding-left:1.6em;columns:2;column-gap:40px;font-size:15px}
.ex-toc li{break-inside:avoid}
.ex-toc a{display:inline-block;padding:6px 0;min-height:44px;line-height:1.7;text-decoration:none}
.ex-toc a:hover{text-decoration:underline}

/* 表 */
.ex-table-wrap{width:100%;max-width:100%;min-width:0;overflow-x:auto;margin:24px 0;-webkit-overflow-scrolling:touch;border-radius:4px}
.ex-sec>.ex-table-wrap{max-width:none;width:min(1120px,calc(100vw - 48px));position:relative;left:50%;transform:translateX(-50%)}
.ex-table{width:100%;border-collapse:collapse;font-size:15px;line-height:1.7;background:#fff}
.ex-table caption{caption-side:top;text-align:left;font-size:16px;font-weight:700;color:var(--navy);padding:0 0 10px}
.ex-table th,.ex-table td{border:1px solid var(--line);padding:14px 16px;vertical-align:top;text-align:left}
.ex-table thead th{background:var(--sky);color:var(--navy);font-weight:700;vertical-align:middle;white-space:nowrap}
.ex-table tbody th{font-weight:700;color:var(--navy);background:#fbfdff}
.ex-table-num td{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
.ex-table-c th,.ex-table-c td{text-align:center}
.ex-sec .ex-table{min-width:760px}
.ex-topics{min-width:1040px!important}
.ex-topics td{font-size:14.5px}
.ex-topics td a{color:var(--blue)}
.ex-summary .ex-table{min-width:640px}
.ex-tag3,.ex-tagp,.ex-tagc{display:inline-block;margin:2px 0 0 6px;padding:2px 6px;border-radius:3px;font-size:12.5px;line-height:1.5;font-weight:700;vertical-align:1px;white-space:nowrap}
.ex-tag3{background:var(--navy);color:#fff}
.ex-tagp{background:var(--cream);color:#7a5a1e;border:1px solid #e6d6b2}
.ex-tagc{background:var(--sky);color:var(--blue);border:1px solid #c6d8ef}

/* 時間配分（番号付きの縦の流れ） */
.ex-sec>ol.ex-steps{list-style:none;padding:0;counter-reset:st;position:relative}
.ex-sec>ol.ex-steps li{position:relative;padding:0 0 22px 48px;counter-increment:st}
.ex-sec>ol.ex-steps li::before{content:counter(st);position:absolute;left:0;top:2px;width:30px;height:30px;border-radius:50%;background:var(--navy);color:#fff;font-weight:700;font-size:15px;line-height:30px;text-align:center}
.ex-sec>ol.ex-steps li:not(:last-child)::after{content:"";position:absolute;left:14px;top:36px;bottom:4px;width:2px;background:var(--line)}

/* 学年別 */
.ex-grade{padding:22px 0;border-top:1px solid var(--line)}
.ex-grade:last-child{border-bottom:1px solid var(--line)}
.ex-grade h3{margin:0 0 8px!important}

/* 過去問カード */
.ex-cards{list-style:none;padding:0;margin-top:24px}
.ex-cards li+li{margin-top:16px}
.ex-cards a{display:block;padding:24px;border:1px solid var(--line);border-radius:6px;background:#fff;text-decoration:none;color:var(--ink)}
.ex-cards a:hover{border-color:var(--blue);opacity:1}
.ex-card-year{display:block;font-size:18px;font-weight:700;color:var(--navy)}
.ex-card-title{display:block;margin-top:6px;font-size:16px}
.ex-card-more{display:block;margin-top:10px;color:var(--blue);font-weight:700;font-size:15px}

/* 代表から */
.ex-voice{padding:32px;background:var(--cream);border-radius:6px}
.ex-sign{text-align:right;font-weight:700;color:var(--navy)}

/* FAQ */
.ex-faq details{border-top:1px solid var(--line)}
.ex-faq details:last-child{border-bottom:1px solid var(--line)}
.ex-faq summary{position:relative;min-height:44px;padding:16px 40px 16px 0;font-weight:700;color:var(--navy);cursor:pointer;list-style:none}
.ex-faq summary::-webkit-details-marker{display:none}
.ex-faq summary::after{content:"+";position:absolute;right:8px;top:12px;font-size:24px;color:var(--gold);font-weight:400}
.ex-faq details[open] summary::after{content:"−"}
.ex-faq details p{padding:0 0 18px;font-size:16px}

/* CTA */
.ex-cta{margin-top:72px;padding:36px 32px;background:var(--navy);color:#fff;border-radius:6px}
.ex-cta h2{font-family:"Noto Serif JP","Noto Sans JP",serif;font-size:26px;line-height:1.5;color:#fff}
.ex-cta p{margin-top:14px;color:#e8eef7}
.ex-cta-btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:22px}
.ex .ex-btn{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:0 28px;border:1px solid #fff;border-radius:4px;color:#fff;text-decoration:none;font-weight:700}
.ex .ex-btn-main{background:#fff;color:var(--navy)}
.ex-sources ul{font-size:14px;line-height:1.8}
.ex-sources li{color:var(--muted)}

/* ===== 過去問解説 ===== */
.ex-q{margin-top:80px}
.ex-qno{display:flex;align-items:center;gap:16px;font-family:"Noto Serif JP","Noto Sans JP",serif;font-size:26px;font-weight:700;color:var(--gold)}
.ex-qno::after{content:"";flex:1;height:1px;background:var(--gold);opacity:.7}
.ex-qno span{order:2;font-family:"Noto Sans JP",sans-serif;font-size:13px;font-weight:700;color:var(--blue);background:var(--sky);border:1px solid #c6d8ef;border-radius:3px;padding:2px 8px;letter-spacing:.02em}
.ex-qhead h2{margin-top:10px;font-family:"Noto Serif JP","Noto Sans JP",serif;font-size:26px;line-height:1.55;color:var(--navy)}
.ex-src{margin-top:8px;font-size:14px;color:var(--muted)}
.ex-label{font-weight:700;color:var(--navy);font-size:18px;margin-bottom:10px!important}
.ex-key{margin-top:24px;padding:22px 24px;background:var(--sky);border-left:3px solid var(--blue);border-radius:4px;font-size:16.5px}
.ex-key .ex-label{color:var(--blue)}
.ex-ans{margin-top:32px}
.ex-ans>.ex-label{font-size:20px;padding-bottom:6px;position:relative}
.ex-ans>.ex-label::after{content:"";position:absolute;left:0;bottom:0;width:48px;height:1px;background:var(--gold)}
.ex-ans h3{margin:28px 0 12px;font-size:20px;color:var(--navy)}
.ex-ans p+p,.ex-ans p+ul,.ex-ans ul+p{margin-top:14px}
.ex-math{overflow-x:auto;overflow-y:hidden;padding:10px 0;margin:4px 0}
.ex-math .katex-display{margin:0}
.ex-result{margin:20px 0!important;color:#000;font-weight:700;font-size:20px;line-height:1.8;text-align:center;overflow-x:auto}
.ex-result .katex{color:#000}
.ex-note{margin-top:32px;padding:22px 24px;background:var(--cream);border-left:3px solid var(--gold);border-radius:4px;font-size:16.5px}
.ex-check{margin-top:24px;padding-top:20px;border-top:1px dotted #b9cbe0;font-size:16px;line-height:1.9}
.ex-check .ex-label{font-size:16px}
.ex-fig{margin:28px auto;text-align:center}
.ex-fig img{max-width:100%;height:auto;display:inline-block}
.ex-fig-s img{max-width:360px;width:100%}
.ex-ans ul.ex-steps{list-style:disc}
.ex-more{margin-top:28px!important;font-weight:700}

@media (max-width:960px){
  .ex-hero h1{font-size:32px}
}
@media (max-width:700px){
  .ex{font-size:16px;line-height:1.9}
  .ex :is(h2,h3,[id]){scroll-margin-top:80px}
  .ex-wrap{width:calc(100% - 40px)}
  .ex-hero{padding:28px 20px 28px}
  .ex-hero h1{font-size:26px;line-height:1.45}
  .ex-meta{font-size:13px}
  .ex-lead{margin-top:28px}
  .ex-sec,.ex-year,.ex-cta{margin-top:48px}
  .ex-sec>h2,.ex-year>h2,.ex-summary>h2{font-size:23px;margin-bottom:20px}
  .ex-sec h3,.ex-ans h3{font-size:18px}
  .ex-summary,.ex-voice{padding:20px 16px}
  .ex-toc{padding:18px 16px}
  .ex-toc ol{columns:1}
  .ex-sec>.ex-table-wrap{width:calc(100vw - 40px)}
  .ex-table th,.ex-table td{padding:12px}
  .ex-table-wrap{background:linear-gradient(90deg,#fff 30%,rgba(255,255,255,0)) left/40px 100% no-repeat local,linear-gradient(270deg,rgba(19,41,75,.12),rgba(19,41,75,0)) right/14px 100% no-repeat scroll}
  .ex-q{margin-top:56px}
  .ex-qno{font-size:22px;flex-wrap:wrap}
  .ex-qno::after{display:none}
  .ex-qhead h2{font-size:21px}
  .ex-key,.ex-note{padding:16px;font-size:16px}
  .ex-result{font-size:18px}
  .ex-cta{padding:24px 20px}
  .ex-cta-btns{flex-direction:column}
  .ex .ex-btn{width:100%}
  .ex .katex{font-size:1.04em}
}
/* 2026-10-31 画面確認後の調整：テーマ全体の指定に負けないように */
.ex h1,.ex h2,.ex h3{font-weight:700}
.ex .ex-toc ol{list-style:decimal}
.ex .ex-toc li::marker{color:var(--gold);font-weight:700}
.ex .ex-sec ul:not(.ex-cards),.ex .ex-key ul,.ex .ex-note ul,.ex .ex-ans ul{list-style:disc}
.ex .ex-toc a{display:block;min-height:0;padding:9px 0}
.ex .ex-toc li{padding-left:2px}
.ex-fig figcaption{max-width:600px;margin:10px auto 0;font-size:14.5px;line-height:1.8;color:var(--muted);text-align:left}
.ex-red{color:#c8372d}.ex-blue{color:var(--blue)}
@media (max-width:700px){.ex-fig img[src*="prob"]{width:100%}}
/* 2026-10-31 一覧（ハブ）・著者欄・合格者の声 */
.ex-quote{margin:18px 0 0;padding:16px 20px;background:#fff;border-left:3px solid var(--gold);border-radius:4px}
.ex-quote p{font-weight:700;color:var(--navy)}
.ex-quote cite{display:block;margin-top:6px;font-style:normal;font-size:14px;color:var(--muted)}
.ex-author{margin-top:56px;padding:20px 24px;border:1px solid var(--line);border-radius:6px;font-size:15px;line-height:1.8}
.ex-author__label{font-size:13px;font-weight:700;color:var(--gold);letter-spacing:.06em}
.ex-author__name{margin-top:2px!important;font-weight:700;color:var(--navy);font-size:17px}
.ex-author p+p{margin-top:6px}
.ex-sec>.ex-cards+.ex-small{margin-top:16px}
@media (max-width:700px){.ex-author{padding:16px}.ex-quote{padding:14px 16px}}
.ex-voice .ex-sign{margin-top:16px!important}
/* ===== 解説の改訂部品（2026-10-31）。デザイン基準：codex-design/05・06 と HANDOFF.md「改訂部品の追加案」 ===== */
.ex-key-lead{margin:-2px 0 14px!important;font-size:15px;color:var(--muted)}
.ex .ex-key ul.ex-plan{list-style:none;padding:0}
.ex-plan li{display:grid;grid-template-columns:32% 24px 1fr;gap:16px;align-items:stretch}
.ex-plan li+li{margin-top:20px!important}
.ex-plan li::before{content:"→";grid-column:2;grid-row:1;align-self:center;text-align:center;color:var(--blue);font-weight:700;font-size:18px}
.ex-cond,.ex-then{display:block;background:#fff;border-radius:4px;padding:12px 14px 14px;line-height:1.8}
.ex-cond{grid-column:1;grid-row:1;font-weight:700;color:var(--navy);font-size:16px}
.ex-then{grid-column:3;grid-row:1;font-size:16px}
.ex-cond::before,.ex-then::before{display:table;margin-bottom:6px;padding:0 8px;border-radius:3px;background:var(--sky);color:var(--blue);font-size:12.5px;font-weight:700;line-height:1.8}
.ex-cond::before{content:"条件"}
.ex-then::before{content:"方針"}
.ex-miss{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.ex-miss+.ex-miss{margin-top:20px}
.ex-miss p{margin:0!important;background:#fff;border-radius:4px;padding:14px 16px 16px;font-size:16px;line-height:1.85}
.ex-miss p>span:first-child{display:table;margin-bottom:6px;padding:0 10px;border-radius:3px;font-size:14px;font-weight:700;line-height:1.8}
.ex-ng{border:1px solid #e3e6eb;color:#3d4a5c}
.ex-ng>span:first-child{background:#e9ecf0;color:#4d5867}
.ex-ok{border:1px solid #e6d6b2}
.ex-ok>span:first-child{background:var(--cream);color:var(--navy);border:1px solid #e6d6b2}
.ex-note .ex-fig{margin:20px auto 0;padding:16px;background:#fff;border:1px solid var(--line);border-radius:4px;max-width:600px}
.ex-note .ex-fig figcaption{margin-top:10px}
.ex-type{margin-top:28px}
.ex-type .ex-label{font-size:18px}
.ex .ex-type ul{list-style:disc;padding-left:1.3em}
.ex-type li+li{margin-top:12px}
.ex-time{margin-top:16px!important;padding:12px 16px;background:var(--sky);border-radius:4px;font-size:16px;color:var(--ink)}
.ex-time strong{font-size:18px;color:var(--navy)}
.ex-try{margin-top:32px;padding:24px;border:1px solid var(--line);border-radius:4px;background:#fff}
.ex-try>p+p{margin-top:12px}
.ex-try details{margin-top:18px}
.ex-try summary{display:flex;align-items:center;gap:10px;min-height:44px;padding:8px 16px;background:var(--sky);border-radius:4px;font-weight:700;color:var(--blue);cursor:pointer;list-style:none}
.ex-try summary::-webkit-details-marker{display:none}
.ex-try summary::before{content:"";width:8px;height:8px;border-right:2px solid var(--blue);border-bottom:2px solid var(--blue);transform:rotate(-45deg);transition:transform .15s}
.ex-try details[open] summary::before{transform:rotate(45deg)}
.ex-try summary:focus-visible{outline:3px solid var(--blue);outline-offset:2px}
.ex-try-ans{padding-top:20px}
.ex-try-ans>p+p{margin-top:14px}
@media (max-width:700px){
  .ex-plan li{grid-template-columns:1fr;gap:8px}
  .ex-plan li::before{content:"↓";grid-column:1;grid-row:2}
  .ex-cond{grid-row:1}.ex-then{grid-column:1;grid-row:3}
  .ex-miss{grid-template-columns:1fr;gap:12px}
  .ex-try{padding:16px}
  .ex-note .ex-fig{padding:10px}
}