@import url('https://fonts.googleapis.com/css2?family=Zen+Kaku+Gothic+New:wght@400;500;700;900&display=swap');

:root{
  --paper:#FFFFFF;
  --paper-deep:#F5F5F3;
  --ink:#151515;
  --ink-soft:#6B6B66;
  --line:#E7E5DF;
  --cat-color:#2E6DB4;
  --cat-soft:#EFF3F6;
}

*{box-sizing:border-box;}
html{scroll-behavior:auto;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'Zen Kaku Gothic New',sans-serif;
  line-height:1.9;
  font-size:clamp(15px,1.6vw,17px);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{font-family:'Zen Kaku Gothic New',sans-serif;font-weight:900;letter-spacing:.01em;}

a{color:var(--cat-color);text-decoration:none;border-bottom:1px solid var(--line);}
a:hover{border-bottom-color:var(--cat-color);}
a.plain{border-bottom:none;}

img,svg{max-width:100%;height:auto;display:block;}

.wrap{max-width:660px;margin:0 auto;padding:0 24px;}
.wrap-wide{max-width:960px;margin:0 auto;padding:0 24px;}

/* ---------- top bar : thin rule, flat rectangular tags ---------- */
.topbar{border-bottom:1px solid var(--ink);padding:20px 0;position:relative;}
.topbar .wrap-wide{display:flex;align-items:center;justify-content:space-between;gap:14px 16px;flex-wrap:wrap;}
.brand{font-weight:900;font-size:1rem;letter-spacing:.02em;color:var(--ink);display:flex;align-items:center;gap:9px;flex-shrink:0;}
.brand .dot{width:.7em;height:.7em;background:var(--cat-color);display:inline-block;animation:dot-pulse 3.2s ease-in-out infinite;}
@keyframes dot-pulse{0%,100%{transform:scale(1);}50%{transform:scale(1.18);}}
.topnav{
  display:flex;flex-wrap:wrap;gap:8px;
  flex:1 1 auto;justify-content:flex-start;
}
.topnav a{
  font-size:.74rem;font-weight:700;color:var(--ink);white-space:nowrap;
  border:1px solid var(--ink);
  padding:8px 12px;
  transition:background-color .15s ease, color .15s ease, border-color .15s ease;
}
.topnav a:hover, .topnav a.active{background:var(--cat-color);color:#fff;border-color:var(--ink);}
.topnav a.cta{background:var(--ink);color:#fff;}
.topnav a.cta:hover, .topnav a.cta.active{background:#9C2A18;}
.topnav a.cta-quiz{background:#1E8449;}
.topnav a.cta-quiz:hover, .topnav a.cta-quiz.active{background:#145C33;}

/* ---------- hamburger menu (tablet / smartphone) ---------- */
.menu-toggle{
  display:none;flex-direction:column;justify-content:center;align-items:center;gap:5px;
  width:40px;height:40px;border:1px solid var(--ink);background:var(--paper);
  cursor:pointer;flex-shrink:0;padding:0;
}
.menu-toggle-bar{display:block;width:20px;height:2px;background:var(--ink);transition:transform .15s ease, opacity .15s ease;}
.menu-toggle[aria-expanded="true"] .menu-toggle-bar:nth-child(1){transform:translateY(7px) rotate(45deg);}
.menu-toggle[aria-expanded="true"] .menu-toggle-bar:nth-child(2){opacity:0;}
.menu-toggle[aria-expanded="true"] .menu-toggle-bar:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

@media (max-width:1024px){
  .menu-toggle{display:flex;}
  .topnav{
    display:flex;flex-direction:column;flex-wrap:nowrap;align-items:stretch;
    position:absolute;left:0;right:0;top:100%;
    background:var(--paper);border-top:1px solid transparent;border-bottom:1px solid transparent;
    padding:0 20px;gap:8px;z-index:30;
    max-height:0;opacity:0;overflow:hidden;
    transform:translateY(-6px);pointer-events:none;
    transition:max-height .3s ease, opacity .22s ease, transform .22s ease, padding .3s ease;
  }
  .topnav.open{
    max-height:70vh;opacity:1;transform:translateY(0);pointer-events:auto;
    padding:14px 20px 20px;overflow-y:auto;
    border-top-color:var(--ink);border-bottom-color:var(--ink);
  }
  .topnav a{width:100%;text-align:left;}
}

/* ---------- breadcrumb ---------- */
.breadcrumb{font-size:.75rem;color:var(--ink-soft);margin:26px 0 4px;}
.breadcrumb a{border-bottom:none;color:var(--ink-soft);}
.breadcrumb a:hover{color:var(--cat-color);}

/* ---------- hero (home) : huge whitespace, one flat block of color ---------- */
.hero{padding:72px 0 48px;}
.hero .kicker{color:var(--cat-color);font-weight:700;font-size:.8rem;letter-spacing:.1em;margin-bottom:20px;}
.hero h1{font-size:clamp(1.8rem,4.6vw,2.5rem);line-height:1.6;margin:0 0 26px;max-width:12em;}
.hero .lede{font-size:1.02rem;color:var(--ink-soft);max-width:32em;}

/* ---------- essay text ---------- */
.essay p{margin:0 0 1.5em;}
.essay{max-width:640px;}
section.block{padding:clamp(30px,6vw,56px) 0;border-top:1px solid var(--line);}
section.block:first-of-type{border-top:none;}
h2.section-title{font-size:1.2rem;margin:0 0 24px;}

/* ---------- priority flow : plain numbered thin-rule steps, no boxes ---------- */
.flow{display:flex;gap:0;overflow-x:auto;padding:6px 0 14px;margin-bottom:8px;}
.flow-step{flex:1 0 160px;border-top:4px solid var(--cat-color);padding:16px 14px 0 0;background:none;}
.flow-step .fnum{font-weight:900;font-size:1.6rem;color:var(--ink);display:block;}
.flow-step p{font-size:.82rem;color:var(--ink-soft);margin:8px 0 0;line-height:1.7;}
.flow-arrow{display:none;}

/* ---------- category tile grid : the "colored square menu" device ---------- */
.pmap{list-style:none;margin:0;padding:0;display:grid;gap:2px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));background:var(--ink);}
.pmap li{
  background:var(--tile-color,#2E6DB4);padding:28px 22px;min-height:220px;
  display:flex;flex-direction:column;justify-content:space-between;
  transition:transform .18s ease;
}
.pmap li:hover{transform:translateY(-4px);}
.pmap .cat-icon{background:#fff;display:inline-flex;padding:10px;align-self:flex-start;}
.pmap .step-num{font-weight:700;font-size:.72rem;color:rgba(255,255,255,.85);letter-spacing:.06em;margin-top:16px;}
.pmap .step-body h3{font-size:1.1rem;margin:6px 0 8px;color:#fff;}
.pmap .step-body p{margin:0 0 14px;color:rgba(255,255,255,.85);font-size:.86rem;}
.pmap .step-body a.cat-link{font-size:.8rem;font-weight:700;color:#fff;border-bottom:1px solid rgba(255,255,255,.6);}

/* ---------- category page ---------- */
.cat-header{padding:52px 0 36px;border-bottom:1px solid var(--ink);background:var(--cat-soft);}
.cat-header .inner{display:flex;align-items:center;gap:22px;flex-wrap:wrap;}
.cat-header .cat-icon-tile{background:var(--cat-color);padding:14px;display:inline-flex;}
.cat-header .num{color:var(--cat-color);font-weight:700;font-size:.85rem;letter-spacing:.06em;margin-bottom:10px;}
.cat-header h1{font-size:clamp(1.4rem,3.6vw,1.9rem);margin:0 0 6px;}
.cat-header .subtitle{color:var(--ink-soft);font-size:1rem;margin:0;}

.tlist{list-style:none;margin:0;padding:0;display:grid;gap:1px;background:var(--line);border:1px solid var(--line);}
.tlist li{background:var(--paper);}
.tlist a.trow{display:flex;gap:14px;align-items:center;padding:18px;border-bottom:none;color:var(--ink);transition:background-color .15s ease, padding-left .15s ease;}
.tlist a.trow:hover{background:var(--cat-soft);padding-left:24px;}
.tlist .t-icon{flex-shrink:0;width:36px;height:36px;}
.tlist .t-text{min-width:0;}
.tlist .t-title{font-size:1rem;display:block;font-weight:700;}
.tlist .t-kicker{font-size:.74rem;color:var(--ink-soft);display:block;margin-top:2px;}

/* ---------- treatment page ---------- */
.t-header{padding:36px 0 26px;display:flex;gap:18px;align-items:center;}
.t-header .t-icon-lg{flex-shrink:0;width:64px;height:64px;background:var(--cat-soft);padding:10px;}
.t-header .kicker{color:var(--cat-color);font-weight:700;font-size:.78rem;letter-spacing:.06em;margin-bottom:8px;}
.t-header h1{font-size:clamp(1.35rem,3.4vw,1.75rem);line-height:1.5;margin:0;}

.lead{
  font-size:1.04rem;color:var(--ink-soft);
  border-left:4px solid var(--cat-color);padding-left:18px;margin:0 0 36px;max-width:600px;
}
.chart-block{margin:32px 0;padding:22px;border-top:4px solid var(--ink);background:var(--paper-deep);}
.diagram-block{margin:32px 0;padding:20px 12px;border:1px solid var(--line);display:flex;justify-content:center;}
.diagram-block svg{max-width:340px;}
.chart-block .chart-caption{font-size:.86rem;font-weight:700;margin-bottom:14px;}
.takeaway{
  margin:36px 0 0;padding:20px 22px;background:var(--cat-soft);border-left:4px solid var(--cat-color);font-size:1rem;
  opacity:0;transform:translateY(14px);
  transition:opacity .5s ease, transform .5s ease;
}
.takeaway.in-view{opacity:1;transform:translateY(0);}
.refs{margin-top:42px;padding-top:20px;border-top:1px solid var(--ink);font-size:.82rem;color:var(--ink-soft);}
.refs .refs-label{font-weight:700;letter-spacing:.04em;margin-bottom:10px;display:block;color:var(--ink);}
.refs ol{margin:0;padding-left:1.3em;}
.refs li{margin-bottom:6px;}
.refs a{color:var(--ink-soft);}

.pager{display:flex;justify-content:space-between;gap:12px;margin-top:50px;padding-top:20px;border-top:1px solid var(--ink);font-size:.85rem;flex-wrap:wrap;}
.pager a{font-weight:700;}

/* ---------- disclaimer / warning : flat color blocks, no rounding ---------- */
.disclaimer{font-size:.82rem;color:var(--ink-soft);background:var(--paper-deep);border-left:4px solid var(--ink);padding:20px 22px;margin:34px 0;}
.disclaimer strong{color:var(--ink);}

.warning{margin:32px 0;padding:22px;background:#FBE7E2;border-left:4px solid #9C2A18;}
.warning .warning-title{font-weight:900;color:#9C2A18;margin:0 0 8px;font-size:1.02rem;}
.warning p{margin:0;color:#5A2016;font-size:.96rem;}

.tldr{
  font-size:.92rem;color:var(--ink);background:var(--cat-soft);
  padding:14px 18px;margin:0 0 26px;border-left:4px solid var(--cat-color);
}
.tldr strong{font-weight:900;}

.faq{margin-top:20px;}
.faq-item{border-top:1px solid var(--line);padding:18px 0;}
.faq-item:first-child{border-top:1px solid var(--ink);}
.faq-q{font-weight:900;margin:0 0 8px;font-size:1rem;}
.faq-a{margin:0;color:var(--ink-soft);}

.checklist{list-style:none;margin:0;padding:0;}
.checklist li{padding:14px 16px;border-top:1px solid var(--line);font-size:.94rem;background:var(--paper);}
.checklist li:first-child{border-top:1px solid var(--ink);}

/* ---------- profile (about page) ---------- */
.profile-list{list-style:none;margin:0;padding:0;}
.profile-list li{padding:10px 0;border-top:1px solid var(--line);font-size:.92rem;color:var(--ink-soft);}
.profile-list li:first-child{border-top:1px solid var(--ink);}
.profile-career{list-style:none;margin:0;padding:0;}
.profile-career li{padding:14px 0;border-top:1px solid var(--line);}
.profile-career li:first-child{border-top:1px solid var(--ink);}
.profile-org{display:block;font-weight:900;font-size:.96rem;margin-bottom:4px;}
.profile-role{display:block;color:var(--ink-soft);font-size:.88rem;line-height:1.7;}
.profile-tags{display:flex;flex-wrap:wrap;gap:8px;}
.profile-tag{
  font-size:.8rem;font-weight:700;border:1px solid var(--ink);padding:6px 12px;
  background:var(--cat-soft);
}

footer{border-top:1px solid var(--ink);margin-top:60px;padding:30px 0 60px;font-size:.78rem;color:var(--ink-soft);}
footer .credit-line{margin-top:10px;font-weight:700;color:var(--ink);}
footer .today-line{margin-top:4px;color:var(--ink-soft);font-size:.76rem;}
footer .view-counter{margin-top:8px;}

.related{margin-top:36px;padding-top:20px;border-top:1px solid var(--ink);}
.related .related-label{font-weight:900;font-size:.85rem;display:block;margin-bottom:12px;}
.related ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px;}
.related li a{
  display:inline-block;font-size:.82rem;font-weight:700;border:1px solid var(--ink);
  padding:8px 12px;border-bottom:1px solid var(--ink);color:var(--ink);
  transition:background-color .15s ease, transform .15s ease;
}
.related li a:hover{background:var(--cat-soft);transform:translateY(-2px);}

/* ---------- quiz ---------- */
.quiz-toolbar{
  display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;
  margin:24px 0 30px;padding:14px 18px;background:var(--paper-deep);border-left:4px solid var(--ink);
}
.quiz-toolbar-buttons{display:flex;gap:8px;flex-wrap:wrap;}
.quiz-progress{font-weight:900;font-size:.92rem;}
.quiz-reset{
  font-family:'Zen Kaku Gothic New',sans-serif;font-weight:700;font-size:.8rem;
  border:1px solid var(--ink);background:var(--paper);padding:8px 14px;cursor:pointer;
}
.quiz-reset:hover{background:var(--ink);color:#fff;}

.quiz-item{border-top:1px solid var(--ink);padding:26px 0;}
.quiz-item:first-child{border-top:none;}
.quiz-q-text{font-weight:900;font-size:1.02rem;margin:0 0 16px;}
.quiz-q-num{color:#1E8449;margin-right:6px;}
.quiz-options{display:flex;flex-direction:column;gap:8px;max-width:560px;}
.quiz-opt{
  font-family:'Zen Kaku Gothic New',sans-serif;text-align:left;font-size:.92rem;
  border:1px solid var(--ink);background:var(--paper);padding:12px 16px;cursor:pointer;
  transition:background-color .18s ease, border-color .18s ease, transform .12s ease;
}
.quiz-opt:hover:not(:disabled){background:var(--cat-soft);}
.quiz-opt:active:not(:disabled){transform:scale(.98);}
.quiz-opt:disabled{cursor:default;}
.quiz-opt.correct{background:#E4F3E9;border-color:#1E8449;font-weight:700;}
.quiz-opt.incorrect{background:#FBE7E2;border-color:#9C2A18;text-decoration:line-through;}
.quiz-feedback{
  margin-top:14px;padding:14px 16px;background:var(--paper-deep);border-left:4px solid var(--ink);max-width:560px;
  opacity:0;max-height:0;overflow:hidden;padding-top:0;padding-bottom:0;margin-top:0;border-left-width:0;
  transition:opacity .25s ease, max-height .3s ease, padding .25s ease, margin .25s ease, border-left-width .25s ease;
}
.quiz-feedback.show{
  opacity:1;max-height:400px;padding-top:14px;padding-bottom:14px;margin-top:14px;border-left-width:4px;
}
.quiz-feedback-text{margin:0 0 10px;font-size:.92rem;}
.quiz-retry{
  font-family:'Zen Kaku Gothic New',sans-serif;font-weight:700;font-size:.78rem;
  border:1px solid #9C2A18;color:#9C2A18;background:var(--paper);padding:7px 12px;cursor:pointer;
}
.quiz-retry:hover{background:#9C2A18;color:#fff;}

.mistake-notebook{margin-top:48px;padding-top:8px;border-top:1px solid var(--ink);}
.mistake-empty{color:var(--ink-soft);font-size:.9rem;}
.mistake-list{list-style:none;margin:0;padding:0;}
.mistake-entry{border-top:1px solid var(--line);padding:16px 0;}
.mistake-entry:first-child{border-top:1px solid var(--ink);}
.mistake-q{font-weight:900;margin:0 0 6px;font-size:.94rem;}
.mistake-expl{margin:0 0 10px;color:var(--ink-soft);font-size:.86rem;}
.mistake-jump{
  font-family:'Zen Kaku Gothic New',sans-serif;font-weight:700;font-size:.78rem;
  border:1px solid var(--ink);background:var(--paper);padding:7px 12px;cursor:pointer;
}
.mistake-jump:hover{background:var(--ink);color:#fff;}

/* ---------- responsive ---------- */
@media (max-width:760px){.cat-header .inner{flex-direction:column;align-items:flex-start;}}
@media (max-width:600px){
  .hero{padding:44px 0 32px;}
  .topnav a{font-size:.7rem;padding:6px 10px;}
  .flow{flex-direction:column;}
  .flow-step{border-top:none;border-left:4px solid var(--cat-color);padding:0 0 14px 14px;}
  .t-header{flex-wrap:wrap;}
  .pager{flex-direction:column;}
}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto;}}

/* ---------- 次に読むなら（回遊導線） ---------- */
.nextsteps{margin-top:40px;padding-top:22px;border-top:1px solid var(--ink);}
.nextsteps-label{font-weight:900;font-size:.9rem;display:block;margin-bottom:14px;}
.nextsteps ul{list-style:none;margin:0;padding:0;display:grid;gap:10px;}
.nextsteps li a{
  display:block;border:1px solid var(--ink);padding:14px 16px;color:var(--ink);
  border-bottom:1px solid var(--ink);transition:background-color .15s ease, padding-left .15s ease;
}
.nextsteps li a:hover{background:var(--cat-soft);padding-left:22px;}
.nextsteps .ns-t{display:block;font-weight:700;font-size:.95rem;}
.nextsteps .ns-n{display:block;font-size:.8rem;color:var(--ink-soft);margin-top:3px;}

/* ---------- ナビ：掌蹠膿疱症とは ---------- */
.topnav a.cta-basics{background:#2E6DB4;}
.topnav a.cta-basics:hover, .topnav a.cta-basics.active{background:#1B4D85;}

/* ---------- クイズ静的フォールバック ---------- */
.quiz-static{margin-top:24px;}
.quiz-static-item{border-top:1px solid var(--line);padding:16px 0;}
.quiz-static-q{font-weight:700;margin:0 0 8px;}
.quiz-static ul{margin:0 0 10px;padding-left:1.4em;}
.quiz-static-a{font-size:.9rem;color:var(--ink-soft);margin:0;}

/* ---------- 本文中の小見出し ---------- */
.body-h2{
  font-size:1.05rem;font-weight:900;margin:34px 0 12px;padding-left:12px;
  border-left:5px solid var(--cat-color);line-height:1.5;
}
.essay .body-h2:first-of-type{margin-top:28px;}

/* ---------- 外部の信頼できる情報源 ---------- */
.extlinks{margin-top:38px;padding-top:22px;border-top:1px solid var(--ink);}
.extlinks-label{font-weight:900;font-size:.9rem;display:block;margin-bottom:14px;}
.extlinks ul{list-style:none;margin:0;padding:0;display:grid;gap:10px;}
.extlinks li a{
  display:block;border:1px solid var(--ink);padding:14px 16px;color:var(--ink);
  background:var(--cat-soft);border-bottom:1px solid var(--ink);
  transition:padding-left .15s ease;
}
.extlinks li a:hover{padding-left:22px;}
footer .footer-community{margin-top:8px;font-size:.78rem;}

/* ---------- プロフィール：運営サイト・プロジェクト ---------- */
.profile-projects{list-style:none;margin:0;padding:0;}
.profile-projects li{padding:16px 0;border-top:1px solid var(--line);}
.profile-projects li:first-child{border-top:1px solid var(--ink);}
.pj-head{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;margin-bottom:5px;}
.pj-head a{font-weight:900;font-size:.98rem;}
.pj-pen{
  font-size:.74rem;font-weight:700;color:var(--ink-soft);
  border:1px solid var(--line);padding:2px 8px;white-space:nowrap;
}
.pj-desc{display:block;color:var(--ink-soft);font-size:.88rem;line-height:1.75;}