/* Swiss anchor tokens — bright lab ledger. Single accent Yves Klein Blue. */
:root{
  --surface:#FFFFFF;
  --panel:#F7F7F8;
  --ink:#111318;
  --muted:#5B6472;
  --line:#E2E4E9;
  --hairline:#111318;
  --accent:#002FA7;
  --accent-ink:#FFFFFF;
  --accent-soft:#E8EDFB;
  --danger:#B00020;
  --radius:12px;
  --radius-sm:8px;
  --inset:16px;
  --content-max:1120px;
  --section-gap:24px;
  --card-pad:16px;
  --btn-min-h:44px;
  --input-min-h:44px;
  --plot-h:240px;
  --strip-h:140px;
  --focus:#002FA7;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}
body{
  margin:0;background:var(--surface);color:var(--ink);
  font-family:"Helvetica Neue",Helvetica,system-ui,-apple-system,"Apple SD Gothic Neo","Noto Sans KR",sans-serif;
  line-height:1.6;font-size:16px;
}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip-link{position:absolute;left:12px;top:-48px;background:var(--ink);color:#fff;padding:10px 14px;border-radius:8px;z-index:50;text-decoration:none}
.skip-link:focus{top:12px;outline:3px solid var(--focus);outline-offset:2px}
.site-header{border-bottom:1px solid var(--line);background:var(--surface);position:sticky;top:0;z-index:20}
.header-inner{max-width:var(--content-max);margin:0 auto;padding:10px var(--inset);display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.brand{margin:0;font-weight:700;font-size:16px;display:flex;align-items:center;gap:8px}
.brand-mark{width:12px;height:12px;background:var(--accent);display:inline-block}
.brand-sub{font-weight:400;color:var(--muted);font-size:13px}
.step-nav ul,.step-nav{margin:0;padding:0}
.step-nav ul{display:flex;gap:4px;list-style:none;flex-wrap:wrap}
.step-nav a{display:inline-block;padding:10px 12px;color:var(--ink);text-decoration:none;border-bottom:2px solid transparent;min-height:var(--btn-min-h)}
.step-nav a:hover{background:var(--panel)}
.step-nav a:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.page{max-width:var(--content-max);margin:0 auto;padding:24px var(--inset) 64px;display:grid;gap:var(--section-gap)}
/* 그리드 자식이 내용 최소폭으로 페이지를 밀어내지 않도록 관계 고정 (320px 검증) */
.page > *, .card, .two-col > *, .exp-grid > *, .compare-grid > *, .visual, .plot-block, .controls{min-width:0;max-width:100%}
h1,h2,h3,p,li,dd,dt,.folio-strip,.run-desc{overflow-wrap:break-word;word-break:keep-all}
.card{border:1px solid var(--line);border-radius:var(--radius);padding:20px;background:var(--surface)}
.hero{border-top:4px solid var(--ink)}
.folio{margin:0 0 8px;font-size:13px;color:var(--muted);letter-spacing:.02em;border-bottom:1px solid var(--line);padding-bottom:8px}
h1{font-size:clamp(26px,4vw,38px);line-height:1.25;margin:8px 0;letter-spacing:-.01em}
h2{font-size:22px;line-height:1.4;margin:8px 0 12px}
h3{font-size:17px;margin:16px 0 8px}
.lede{font-size:17px;max-width:60ch}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:16px 0}
.hero-facts{display:grid;gap:8px;margin:16px 0 0;padding:12px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm)}
.hero-facts div{display:grid;grid-template-columns:90px 1fr;gap:12px;min-width:0}
.hero-facts dt,.hero-facts dd{min-width:0}
.hero-facts dt{font-weight:700}
.hero-facts dd{margin:0}
/* Buttons — shared component */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:var(--btn-min-h);padding:10px 18px;border-radius:var(--radius-sm);border:1px solid var(--ink);background:var(--surface);color:var(--ink);font:inherit;font-weight:600;text-decoration:none;cursor:pointer}
.btn:hover{background:var(--panel)}
.btn:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn-primary:hover{background:#00248A}
.btn-secondary{border-width:2px}
.btn-ghost{border-color:var(--line)}
.btn-sm{min-height:40px;padding:6px 12px;font-size:14px}
/* gi-pulse aura — single next action only, static border under reduced motion */
.gi-pulse{position:relative;box-shadow:0 0 0 3px var(--accent-soft),0 0 18px rgba(0,47,167,.45)}
@media (prefers-reduced-motion:reduce){
  .gi-pulse{box-shadow:none;border:3px solid var(--accent)}
}
/* Forms */
.field{margin:12px 0}
.field label,.field legend{font-weight:700}
.field label{display:block;margin-bottom:6px}
fieldset{border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px;margin:0 0 12px}
legend{padding:0 6px}
input[type="number"],input[type="text"],select,textarea{width:100%;min-height:var(--input-min-h);padding:10px 12px;border:1px solid var(--ink);border-radius:var(--radius-sm);background:#fff;color:var(--ink);font:inherit}
input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.inline-inputs{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.hint{font-size:13px;color:var(--muted);margin:6px 0}
.note{background:var(--panel);border-left:4px solid var(--accent);padding:10px 12px;font-size:14px}
.check-list{margin:8px 0;padding-left:20px}
.radio{display:flex!important;gap:8px;align-items:center;font-weight:400!important;border:1px solid var(--line);border-radius:8px;padding:10px;margin:6px 0!important;min-height:var(--btn-min-h)}
.radio input{width:20px;height:20px;accent-color:var(--accent)}
.actions{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}
.error{color:var(--danger);font-weight:700;min-height:1.5em}
.error:empty{display:none;min-height:0}
.progress{display:flex;align-items:center;gap:8px;margin:8px 0}
.progress[hidden]{display:none}
.status{font-size:14px;color:var(--ink);background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:8px 10px;min-height:1.5em}
.status:empty{display:none}
progress{width:160px;height:14px;accent-color:var(--accent)}
/* Experiment layout — responsive relationship */
.exp-grid{display:grid;grid-template-columns:340px minmax(0,1fr);gap:20px;align-items:start}
@media (max-width:899px){
  .exp-grid{grid-template-columns:minmax(0,1fr)}
}
.controls{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px}
.visual{min-width:0}
.folio-strip{font-variant-numeric:tabular-nums;font-size:14px;font-weight:700;border:1px solid var(--ink);border-radius:8px;padding:8px 10px;background:#fff}
/* 실행 상태 뱃지 — 모양+글로 구분 (색만으로 알리지 않음, WCAG 1.4.1) */
.state-badge{display:inline-block;font-size:14px;font-weight:700;border:1px solid var(--ink);border-radius:999px;padding:4px 12px;margin:8px 0;background:var(--panel)}
.state-badge[data-state="sampling"]{border-width:2px}
.state-badge[data-state="completed"]{background:var(--ink);color:#fff}
.state-badge[data-state="paused"],.state-badge[data-state="cancelled"]{border-style:dashed}
canvas{width:100%;height:auto;border:1px solid var(--line);border-radius:8px;background:#fff;display:block}
.legend{list-style:none;display:flex;gap:16px;flex-wrap:wrap;padding:0;margin:8px 0;font-size:14px}
.sw{display:inline-block;width:22px;height:12px;border:1px solid var(--ink);margin-right:6px;vertical-align:middle}
.sw-theory{background:var(--accent);height:4px}
.sw-hist{background:#C9D2F5}
.sw-dot{background:#fff;border-radius:50%;width:12px;height:12px;border:2px solid var(--ink)}
.fallback{margin-top:12px}
.fallback summary{min-height:var(--btn-min-h);cursor:pointer;padding:10px;font-weight:700}
.fallback summary:focus-visible{outline:3px solid var(--focus)}
.svg-wrap{border:1px solid var(--line);border-radius:8px;padding:8px;overflow-x:auto}
.table-scroll{overflow-x:auto;margin:12px 0;border:1px solid var(--line);border-radius:8px}
table{border-collapse:collapse;width:100%;font-size:14px;font-variant-numeric:tabular-nums;min-width:480px}
caption{text-align:left;font-weight:700;padding:8px}
th,td{border-top:1px solid var(--line);padding:8px 10px;text-align:left}
th{background:var(--panel)}
.two-col{display:grid;grid-template-columns:1.1fr .9fr;gap:20px}
@media (max-width:899px){.two-col{grid-template-columns:minmax(0,1fr)}}
/* 생성 이미지 — 개념 맥락용 삽화. 측정값·그래프는 코드 렌더만 사용 */
figure{margin:0;min-width:0}
figure img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--panel)}
figcaption{font-size:13px;color:var(--muted);margin-top:6px}
.hero-figure{margin:16px 0 0;max-width:720px}
.intro-figures{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}
.cond-cards{list-style:none;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;padding:0;margin:12px 0}
@media (max-width:767px){
  .intro-figures{grid-template-columns:minmax(0,1fr)}
  .cond-cards{grid-template-columns:minmax(0,1fr)}
}
.compare-actions{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0 12px}
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:12px}
@media (max-width:767px){.compare-grid{grid-template-columns:minmax(0,1fr)}}
.run-card{border:1px solid var(--line);border-radius:8px;padding:12px;background:var(--panel)}
.run-desc{font-variant-numeric:tabular-nums;margin:0}
.site-footer{border-top:4px solid var(--ink);margin-top:24px}
.footer-inner{max-width:var(--content-max);margin:0 auto;padding:16px var(--inset);display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap;font-size:14px;color:var(--muted)}
dialog{border:1px solid var(--ink);border-radius:12px;padding:20px;max-width:min(560px,92vw)}
dialog::backdrop{background:rgba(0,0,0,.4)}
@media (max-width:420px){
  :root{--inset:12px}
  .card{padding:14px}
  .inline-inputs,.field-row{grid-template-columns:minmax(0,1fr)}
  h1{font-size:26px}
}