/* OKD SOFT — 読みもの／資料室 共通スタイル
   トップ(index.html)のデザイントークンをそのまま踏襲。
   トップはインラインCSSの単一ファイル構成なので、こちらは別ファイルで持つ。 */

:root{
  --ink:#13233A;
  --ink-soft:#5A6472;
  --paper:#FFFFFF;
  --paper-2:#F4F5F7;
  --line:#E1E4E9;
  --accent:#1C8273;
  --accent-deep:#136256;
  --accent-light:#3AA893;
  --warm:#C8842B;
  --white:#FFFFFF;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Noto Sans JP",sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.95;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto}
.wrap{max-width:1080px;margin:0 auto;padding:0 28px}
.wrap-narrow{max-width:760px;margin:0 auto;padding:0 28px}

.eyebrow{
  font-family:"Space Grotesk","Zen Kaku Gothic New","Noto Sans JP",sans-serif;
  font-size:1.2rem;font-weight:900;letter-spacing:.1em;
  text-transform:uppercase;color:var(--accent);
  display:inline-block;margin-bottom:20px;
}
.eyebrow::before{content:"";display:inline-block;width:40px;height:3px;
  background:currentColor;vertical-align:middle;margin-right:14px;}
h1,h2,h3,h4{font-family:"Zen Kaku Gothic New",sans-serif;letter-spacing:.01em}

.skip{position:absolute;left:-9999px;top:0;background:var(--accent);color:#fff;padding:10px 18px;z-index:100}
.skip:focus{left:8px;top:8px}

/* ---------- wordmark ---------- */
.wordmark{font-family:"Space Grotesk",sans-serif;font-weight:700;
  letter-spacing:.18em;color:var(--ink);white-space:nowrap;}
.wordmark b{color:var(--accent);font-weight:700}

/* ---------- header ---------- */
header.site{position:sticky;top:0;z-index:50;
  background:rgba(19,35,58,.94);backdrop-filter:blur(8px);
  border-bottom:1px solid rgba(255,255,255,.08);}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.nav .wordmark{color:var(--paper);font-size:1rem}
.nav .wordmark a{color:inherit;text-decoration:none}
.nav-links{display:flex;gap:20px;align-items:center}
.nav-links a{color:rgba(255,255,255,.78);text-decoration:none;
  font-size:.82rem;font-weight:500;transition:color .2s;white-space:nowrap}
.nav-links a:hover{color:var(--paper)}
.nav-links a[aria-current="page"]{color:var(--paper)}
.nav-cta{padding:9px 16px;border:1px solid var(--accent);border-radius:2px;color:var(--paper)!important}
.nav-cta:hover{background:var(--accent)}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:10px;width:44px;height:44px}
.nav-toggle span{display:block;height:1.5px;background:var(--paper);margin:5px 0;transition:transform .2s,opacity .2s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{display:inline-block;font-weight:700;font-size:.92rem;text-decoration:none;
  padding:14px 30px;border-radius:2px;transition:transform .15s,background .2s,color .2s}
.btn-primary{background:var(--accent);color:var(--white)}
.btn-primary:hover{background:var(--accent-deep);transform:translateY(-2px)}
.btn-line{border:1px solid var(--line);color:var(--ink);background:var(--white)}
.btn-line:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.btn-ghost{border:1px solid rgba(255,255,255,.35);color:var(--paper)}
.btn-ghost:hover{border-color:var(--paper);transform:translateY(-2px)}

/* ---------- page head ---------- */
.page-head{background:var(--ink);color:var(--paper);padding:76px 0 64px}
.page-head .eyebrow{color:var(--accent-light)}
.page-head h1{font-weight:900;font-size:clamp(1.6rem,3.6vw,2.5rem);line-height:1.45}
.page-head p.lead{margin-top:22px;color:rgba(255,255,255,.82);font-weight:400;max-width:40em}

.crumb{font-size:.78rem;color:rgba(255,255,255,.6);margin-bottom:18px}
.crumb a{color:rgba(255,255,255,.78);text-decoration:none}
.crumb a:hover{text-decoration:underline}

.meta{margin-top:26px;display:flex;gap:14px;flex-wrap:wrap;align-items:center;
  font-size:.78rem;color:rgba(255,255,255,.66)}
.meta time{font-family:"Space Grotesk",sans-serif;letter-spacing:.06em}
.tag{display:inline-block;border:1px solid rgba(255,255,255,.28);border-radius:2px;
  padding:3px 10px;font-size:.72rem;color:rgba(255,255,255,.8)}

/* ---------- article body ---------- */
.article{padding:64px 0 88px}
.toc{border:1px solid var(--line);background:var(--paper-2);padding:24px 28px;margin-bottom:52px}
.toc h2{font-size:.9rem;font-weight:700;letter-spacing:.08em;color:var(--ink-soft);margin-bottom:12px}
.toc ol{list-style:none;counter-reset:toc}
.toc li{counter-increment:toc;margin:8px 0;font-size:.92rem;line-height:1.7}
.toc li::before{content:counter(toc,decimal-leading-zero);font-family:"Space Grotesk",sans-serif;
  color:var(--accent);font-weight:700;margin-right:12px;font-size:.8rem}
.toc a{color:var(--ink);text-decoration:none}
.toc a:hover{color:var(--accent);text-decoration:underline}

.body h2{font-size:clamp(1.25rem,2.4vw,1.6rem);font-weight:700;line-height:1.55;
  margin:64px 0 22px;padding-left:18px;border-left:5px solid var(--accent);scroll-margin-top:84px}
.body h3{font-size:1.05rem;font-weight:700;margin:40px 0 14px;color:var(--ink)}
.body p{margin:20px 0}
.body ul,.body ol{margin:20px 0 20px 1.5em}
.body li{margin:9px 0}
.body strong{font-weight:700;background:linear-gradient(transparent 62%,rgba(28,130,115,.16) 62%)}
.body a{color:var(--accent-deep);text-decoration:underline;text-underline-offset:3px}
.body a:hover{color:var(--accent)}
.body code{font-family:Consolas,"Courier New",monospace;font-size:.88em;
  background:var(--paper-2);border:1px solid var(--line);border-radius:2px;padding:2px 6px}
.body pre{background:#0E1B2E;color:#E8EDF3;padding:20px 22px;border-radius:3px;
  overflow-x:auto;margin:26px 0;font-size:.86rem;line-height:1.75}
.body pre code{background:none;border:0;padding:0;color:inherit;font-size:1em}
.body blockquote{border-left:3px solid var(--line);padding:4px 0 4px 22px;margin:26px 0;color:var(--ink-soft)}
.body hr{border:0;border-top:1px solid var(--line);margin:52px 0}
.table-scroll{overflow-x:auto;margin:26px 0}
.body table{border-collapse:collapse;width:100%;font-size:.9rem;min-width:520px}
.body th,.body td{border:1px solid var(--line);padding:11px 14px;text-align:left;vertical-align:top}
.body th{background:var(--paper-2);font-weight:700;white-space:nowrap}

.note{border:1px solid var(--line);border-left:4px solid var(--warm);
  background:#FDFAF5;padding:20px 24px;margin:30px 0}
.note .note-t{font-weight:700;font-size:.9rem;color:var(--warm);
  letter-spacing:.04em;margin-bottom:8px;display:block}
.note p{margin:8px 0}
.note p:first-of-type{margin-top:0}
.note p:last-child{margin-bottom:0}

/* ---------- cards ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:0;
  border-top:1px solid var(--line)}
.card{border-bottom:1px solid var(--line);border-right:1px solid var(--line);
  padding:34px 30px;display:flex;flex-direction:column;gap:12px;
  text-decoration:none;color:inherit;transition:background .2s}
.card:hover{background:var(--paper-2)}
.card .k{font-family:"Space Grotesk",sans-serif;font-size:.72rem;letter-spacing:.1em;
  color:var(--ink-soft)}
.card h3{font-size:1.06rem;font-weight:700;line-height:1.6}
.card p{font-size:.88rem;color:var(--ink-soft);line-height:1.8}
.card .more{margin-top:auto;font-size:.8rem;font-weight:700;color:var(--accent)}
.card .more::after{content:" →"}
.tags{display:flex;gap:8px;flex-wrap:wrap}
.tags span{font-size:.7rem;border:1px solid var(--line);border-radius:2px;
  padding:2px 8px;color:var(--ink-soft)}
.empty{padding:60px 0;color:var(--ink-soft);text-align:center}

/* ---------- 症状から探す ---------- */
.symptoms{background:var(--paper-2);border-bottom:1px solid var(--line);padding:72px 0}
.sec-head{margin-bottom:40px}
.sec-head h2{font-weight:700;font-size:clamp(1.4rem,2.6vw,1.9rem);line-height:1.45}
.sec-head p{margin-top:14px;color:var(--ink-soft);font-size:.95rem}
.sym-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:26px}
.sym{background:var(--white);border:1px solid var(--line);border-top:3px solid var(--accent);
  padding:26px 26px 22px}
.sym h3{font-size:1.04rem;font-weight:700;line-height:1.5}
.sym > p{margin-top:10px;font-size:.84rem;color:var(--ink-soft);line-height:1.8}
.sym ul{list-style:none;margin-top:16px;border-top:1px solid var(--line);padding-top:6px}
.sym li{margin:0;border-bottom:1px solid var(--line)}
.sym li:last-child{border-bottom:0}
.sym a{display:block;padding:11px 0 11px 18px;position:relative;
  color:var(--ink);text-decoration:none;font-size:.9rem;line-height:1.7;
  transition:color .2s,padding .2s}
.sym a::before{content:"›";position:absolute;left:2px;top:11px;color:var(--accent);font-weight:700}
.sym a:hover{color:var(--accent);padding-left:22px}

/* ---------- 絞り込み（検索＋タグ） ---------- */
.finder{margin-bottom:34px}
.visually-hidden{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.search input{
  width:100%;max-width:520px;font-family:inherit;font-size:.95rem;
  padding:13px 16px;border:1px solid var(--line);border-radius:2px;
  background:var(--white);color:var(--ink);
}
.search input::placeholder{color:var(--ink-soft);opacity:.8}
.search input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(28,130,115,.12)}
.filter{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.chip{font-family:inherit;cursor:pointer;background:var(--white);
  border:1px solid var(--line);border-radius:2px;padding:8px 14px;
  font-size:.82rem;font-weight:500;color:var(--ink-soft);
  transition:border-color .2s,color .2s,background .2s}
.chip span{margin-left:8px;font-family:"Space Grotesk",sans-serif;font-size:.72rem;
  color:var(--ink-soft);opacity:.7}
.chip:hover{border-color:var(--accent);color:var(--accent)}
.chip.on{background:var(--ink);border-color:var(--ink);color:var(--white);font-weight:700}
.chip.on span{color:var(--white);opacity:.6}
.sr-live{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.card[hidden]{display:none}

/* ---------- 記事末CTA ---------- */
.endcta{margin-top:72px;border:1px solid var(--line);border-top:4px solid var(--accent);
  background:var(--paper-2);padding:36px 34px}
.endcta h2{font-size:1.12rem;font-weight:700;margin:0 0 14px;border:0;padding:0}
.endcta p{font-size:.92rem;color:var(--ink-soft);margin:10px 0}
.endcta .actions{margin-top:24px;display:flex;gap:14px;flex-wrap:wrap}
.endcta .btn{padding:12px 26px;font-size:.86rem}

.dl-row{display:flex;gap:18px;align-items:flex-start;border:1px solid var(--line);
  padding:22px 24px;margin:26px 0;background:var(--white)}
.dl-row .ico{font-family:"Space Grotesk",sans-serif;font-weight:700;font-size:.7rem;
  letter-spacing:.08em;color:var(--white);background:var(--accent);padding:5px 9px;border-radius:2px;flex:none}
.dl-row h3{font-size:1rem;margin-bottom:6px}
.dl-row p{font-size:.86rem;color:var(--ink-soft);margin:6px 0 14px}
.dl-row .fmeta{font-size:.72rem;color:var(--ink-soft);margin-top:10px}

.next{margin-top:72px;padding-top:34px;border-top:1px solid var(--line)}
.next h2{font-size:.9rem;letter-spacing:.08em;color:var(--ink-soft);margin-bottom:18px;border:0;padding:0}
.next ul{list-style:none;margin:0}
.next li{margin:12px 0}
.next a{color:var(--ink);text-decoration:none;font-weight:700;font-size:.95rem}
.next a:hover{color:var(--accent);text-decoration:underline}
.next a::before{content:"— ";color:var(--accent)}

/* ---------- footer ---------- */
footer.site{background:#0E1B2E;color:rgba(255,255,255,.62);padding:52px 0 38px;font-size:.85rem}
.foot-top{display:grid;grid-template-columns:1fr auto;gap:28px;align-items:start}
.foot .wordmark{color:var(--paper);font-size:1.05rem}
.foot-tag{margin-top:10px;color:rgba(255,255,255,.62)}
.foot-list{display:grid;grid-template-columns:auto 1fr;gap:6px 20px;font-size:.85rem}
.foot-list dt{font-family:"Space Grotesk",sans-serif;font-weight:700;
  letter-spacing:.08em;color:rgba(255,255,255,.42);font-size:.72rem;padding-top:3px}
.foot-list dd{color:rgba(255,255,255,.78)}
.foot-list a{color:rgba(255,255,255,.78);text-decoration:none}
.foot-list a:hover{color:var(--paper);text-decoration:underline}
.foot-btm{margin-top:34px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.75rem;
  color:rgba(255,255,255,.42)}

@media(max-width:900px){
  .nav-links{gap:16px}
  .nav-links a{font-size:.78rem}
}
@media(max-width:820px){
  .nav-toggle{display:block}
  .nav-links{
    position:absolute;top:64px;left:0;right:0;background:rgba(19,35,58,.99);
    flex-direction:column;align-items:stretch;gap:0;max-height:0;overflow:hidden;
    transition:max-height .25s ease;border-bottom:1px solid rgba(255,255,255,.08)
  }
  .nav-links.open{max-height:460px}
  .nav-links a{padding:14px 28px;font-size:.9rem;border-top:1px solid rgba(255,255,255,.06)}
  .nav-cta{margin:14px 28px 20px;text-align:center}
  .foot-top{grid-template-columns:1fr}
  .article{padding:44px 0 64px}
  .cards{grid-template-columns:1fr}
  .card{border-right:0}
  .dl-row{flex-direction:column}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}
a:focus-visible,.btn:focus-visible,button:focus-visible{outline:2px solid var(--warm);outline-offset:3px}