/* ===== セット図くん 記事・カテゴリ共通スタイル（全記事で共有） ===== */
*{margin:0;padding:0;box-sizing:border-box}
:root{--accent:#d8313f;--ink:#2a2723;--muted:#6b6459;--bg:#fbf7f1;--line:#eadfce;--soft:#fff4f0}
html{scroll-behavior:smooth}
body{font-family:'Zen Kaku Gothic New','Hiragino Kaku Gothic ProN','Noto Sans JP','Yu Gothic',sans-serif;color:var(--ink);background:var(--bg);line-height:1.95;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:#1a63c4}
.wrap{max-width:760px;margin:0 auto;padding:0 18px}
.wrap.wide{max-width:960px}
/* header */
header.site{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
header.site .in{max-width:960px;margin:0 auto;padding:12px 18px;display:flex;align-items:center;gap:10px}
header.site .logo{font-family:'Zen Maru Gothic';font-weight:900;font-size:19px;color:var(--ink);text-decoration:none;display:inline-flex;align-items:center;gap:7px}
header.site .logo .ico{font-size:21px;transition:transform .3s}
header.site .logo:hover .ico{transform:rotate(-12deg) scale(1.1)}
header.site .top-cta{margin-left:auto;background:var(--accent);color:#fff;text-decoration:none;font-weight:800;font-size:13.5px;padding:9px 15px;border-radius:999px;white-space:nowrap;transition:transform .12s,box-shadow .12s}
header.site .top-cta:hover{transform:translateY(-1px);box-shadow:0 6px 16px rgba(216,49,63,.3)}
/* breadcrumb */
.crumb{max-width:960px;margin:0 auto;padding:11px 18px 0;font-size:12.5px;color:var(--muted)}
.crumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.crumb li{display:flex;align-items:center;gap:6px}
.crumb li+li::before{content:"›";color:#c3b8a6}
.crumb a{color:var(--muted);text-decoration:none}
.crumb a:hover{text-decoration:underline}
.crumb [aria-current]{color:var(--ink);font-weight:700}
/* article */
article{background:#fff;border:1px solid var(--line);border-radius:16px;margin:16px auto 0;padding:30px 26px 40px;box-shadow:0 10px 30px rgba(60,50,30,.05)}
.eyebrow{display:inline-block;background:var(--soft);color:var(--accent);font-family:'Zen Maru Gothic';font-weight:700;font-size:12px;padding:4px 11px;border-radius:999px;margin-bottom:12px}
h1{font-family:'Zen Maru Gothic';font-weight:900;font-size:27px;line-height:1.45;letter-spacing:.01em;margin-bottom:12px}
.meta{font-size:12.5px;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:8px}
article p{margin:14px 0}
article h2{font-family:'Zen Maru Gothic';font-weight:900;font-size:22px;line-height:1.5;margin:38px 0 12px;padding:11px 0 11px 15px;border-left:6px solid var(--accent);background:linear-gradient(90deg,var(--soft),transparent);scroll-margin-top:70px}
article h3{font-family:'Zen Maru Gothic';font-weight:700;font-size:17.5px;margin:26px 0 8px;color:#3a352d;padding-left:12px;border-left:3px solid #e6b9b0}
article ul,article ol{margin:12px 0 12px 1.3em}
article li{margin:6px 0}
strong{font-weight:800;background-image:linear-gradient(transparent 62%,#ffe1a8 62%);background-repeat:no-repeat;background-size:100% 100%;padding:0 1px}
strong.mk-init{background-size:0% 100%}
strong.mk-init.lit{background-size:100% 100%;transition:background-size .6s cubic-bezier(.5,0,.1,1)}
.lead{font-size:16.5px;color:#4a443c;text-wrap:pretty;word-break:auto-phrase;line-break:strict}
/* TOC */
.toc{background:#fbf9f5;border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin:22px 0}
.toc .tt{font-family:'Zen Maru Gothic';font-weight:700;font-size:14px;color:var(--muted);margin-bottom:8px}
.toc ol{list-style:none;counter-reset:t;margin:0}
.toc li{counter-increment:t;margin:5px 0;font-size:14.5px}
.toc li::before{content:counter(t);display:inline-flex;width:20px;height:20px;background:var(--accent);color:#fff;border-radius:50%;font-size:11px;font-weight:700;align-items:center;justify-content:center;margin-right:8px;vertical-align:middle;transition:transform .2s}
.toc li:hover::before{transform:scale(1.18)}
.toc a{color:var(--ink);text-decoration:none}
.toc a:hover{color:var(--accent)}
/* table */
.tblwrap{overflow-x:auto;margin:16px 0}
table.info{width:100%;border-collapse:collapse;font-size:14px;min-width:420px}
table.info th,table.info td{border:1px solid var(--line);padding:9px 11px;text-align:left;vertical-align:top}
table.info th{background:var(--soft);font-family:'Zen Maru Gothic';font-weight:700;color:#7a3b34;white-space:nowrap}
table.info thead th{background:var(--accent);color:#fff}
/* callout */
.note{background:#f4f8ff;border:1px solid #d5e3f7;border-radius:12px;padding:14px 16px;margin:18px 0;font-size:14.5px}
.note.warn{background:#fff6f2;border-color:#f2ccc0}
.note b{color:var(--accent)}
/* CTA */
.cta{background:linear-gradient(135deg,#fff3ef,#ffe9e2);border:1.5px solid #f3c9bd;border-radius:16px;padding:22px 20px;margin:26px 0;text-align:center;transition:transform .2s,box-shadow .2s}
.cta:hover{transform:translateY(-2px)}
.cta .ct{font-family:'Zen Maru Gothic';font-weight:900;font-size:18px;line-height:1.5;margin-bottom:6px}
.cta .cs{font-size:13.5px;color:var(--muted);margin-bottom:14px}
a.btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;font-weight:800;font-size:16px;padding:15px 26px;border-radius:999px;box-shadow:0 8px 20px rgba(216,49,63,.28);position:relative;overflow:hidden;transition:transform .12s,box-shadow .12s}
a.btn:active{transform:translateY(1px)}
a.btn:hover{transform:translateY(-2px);box-shadow:0 13px 28px rgba(216,49,63,.34)}
a.btn::after{content:"";position:absolute;top:0;left:-70%;width:45%;height:100%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.55),transparent);transform:skewX(-18deg);animation:shine 3.6s ease-in-out infinite;pointer-events:none}
@keyframes shine{0%{left:-70%}45%{left:145%}100%{left:145%}}
.cta .cnote{font-size:11.5px;color:#9a8f80;margin-top:9px}
a.inlink{font-weight:700}
/* inline stage example */
.exwrap{margin:18px 0}
.excap{font-size:12.5px;color:var(--muted);text-align:center;margin-top:6px}
.stg{position:relative;overflow:hidden;background:#fffdfb;border:2px solid #22272f;border-radius:12px;height:210px;background-image:linear-gradient(#eee 1px,transparent 1px),linear-gradient(90deg,#eee 1px,transparent 1px);background-size:20px 20px}
.exwrap .stg{animation:floaty 6.5s ease-in-out infinite}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
.stg .ed{position:absolute;font-family:'Zen Maru Gothic';font-weight:700;font-size:10px;color:#5a544b;background:rgba(251,243,238,.92);padding:1px 7px;border-radius:7px;z-index:2}
.stg .e-back{left:50%;top:6px;transform:translateX(-50%)} .stg .e-left{left:6px;top:50%;transform:translateY(-50%)}
.stg .e-right{right:6px;top:50%;transform:translateY(-50%)} .stg .e-front{left:50%;bottom:6px;transform:translateX(-50%);color:var(--accent)}
.stg .cr{position:absolute;right:7px;bottom:5px;font-size:8px;color:#bcb4aa;z-index:2}
.stg .o{position:absolute;transform:translate(-50%,-50%);display:flex;align-items:center;justify-content:center;background:#fff;border:2px solid var(--c,#888);color:#22272f;font-weight:800;font-size:11px;box-shadow:0 2px 5px rgba(0,0,0,.08);z-index:1;white-space:nowrap}
.stg .rect{min-width:34px;height:22px;border-radius:8px;padding:0 7px} .stg .circ{width:44px;height:44px;border-radius:50%}
.stg .wed{width:44px;height:22px;background:#23272b;border:0;clip-path:polygon(15% 0,85% 0,100% 100%,0 100%);box-shadow:none}
.stg .mic{background:transparent;border:0;box-shadow:none;flex-direction:column} .stg .mic .ml{font-size:10px;font-weight:800;color:#3a342b}
/* checklist */
.chk{list-style:none;margin:14px 0!important}
.chk li{position:relative;padding-left:30px;margin:9px 0}
.chk li::before{content:"✓";position:absolute;left:0;top:0;width:21px;height:21px;background:#eafaf0;color:#1c9a54;border:1px solid #bfe6cd;border-radius:6px;font-weight:800;font-size:13px;display:flex;align-items:center;justify-content:center}
/* FAQ */
.faq details{border:1px solid var(--line);border-radius:12px;margin:10px 0;background:#fff;overflow:hidden}
.faq summary{cursor:pointer;list-style:none;padding:15px 18px;font-family:'Zen Maru Gothic';font-weight:700;font-size:15.5px;display:flex;gap:10px;align-items:flex-start}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"Q";flex:0 0 auto;width:24px;height:24px;background:var(--accent);color:#fff;border-radius:6px;font-size:13px;display:flex;align-items:center;justify-content:center;transition:transform .25s}
.faq details[open] summary::before{transform:rotate(360deg)}
.faq details[open] summary{border-bottom:1px solid var(--line)}
.faq .fa{padding:14px 18px 16px;font-size:14.5px;color:#453f37}
.faq .fa a{background-image:linear-gradient(#1a63c4,#1a63c4);background-repeat:no-repeat;background-position:0 100%;background-size:0% 1.5px;transition:background-size .3s}
.faq .fa a:hover{background-size:100% 1.5px}
/* related */
.related{margin-top:34px}
.related h2{border:0;background:none;padding:0;font-size:18px;margin-bottom:12px}
.rlist{display:grid;gap:10px}
.rlist a{display:block;border:1px solid var(--line);border-radius:12px;padding:13px 15px;text-decoration:none;color:var(--ink);background:#fff;font-weight:700;font-size:14.5px;transition:border-color .12s,background .12s}
.rlist a:hover{border-color:var(--accent);background:var(--soft)}
.rlist a .rc{display:block;font-size:11.5px;color:var(--accent);font-weight:700;margin-bottom:2px}
article p a{background-image:linear-gradient(#1a63c4,#1a63c4);background-repeat:no-repeat;background-position:0 100%;background-size:0% 1.5px;transition:background-size .3s}
article p a:hover{background-size:100% 1.5px}
/* ===== category index ===== */
.cathead{padding:26px 2px 6px}
.cathead .eyebrow{margin-bottom:10px}
.cathead h1{font-size:26px;margin-bottom:8px}
.cathead p{color:var(--muted);font-size:14.5px;max-width:640px;text-wrap:balance;word-break:auto-phrase;line-break:strict}
.cats{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 6px}
.cats a{font-family:'Zen Maru Gothic';font-weight:700;font-size:13px;text-decoration:none;color:var(--muted);background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 14px;transition:background .12s,color .12s,border-color .12s}
.cats a.on,.cats a:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;margin:18px 0 10px}
.card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;text-decoration:none;color:var(--ink);box-shadow:0 8px 22px rgba(60,50,30,.05);transition:transform .12s,border-color .12s}
.card:hover{transform:translateY(-3px);border-color:var(--accent)}
.card .thumb{height:118px;background:linear-gradient(135deg,#fff3ef,#ffe4db);display:flex;align-items:center;justify-content:center;font-size:44px}
.card .cbody{padding:15px 16px 18px}
.card .ccat{display:inline-block;font-size:11px;font-weight:700;color:var(--accent);background:var(--soft);border-radius:6px;padding:2px 8px;margin-bottom:8px}
.card h2{font-family:'Zen Maru Gothic';font-weight:700;font-size:16px;line-height:1.5;margin-bottom:7px}
.card p{font-size:13px;color:var(--muted);line-height:1.75}
.card .date{margin-top:10px;font-size:11.5px;color:#a99f90}
.cta-strip{background:linear-gradient(135deg,#fff3ef,#ffe9e2);border:1.5px solid #f3c9bd;border-radius:16px;padding:20px;margin:22px 0;text-align:center}
.cta-strip .t{font-family:'Zen Maru Gothic';font-weight:900;font-size:17px;margin-bottom:10px}
.cta-strip a{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;font-weight:800;font-size:15px;padding:13px 24px;border-radius:999px;box-shadow:0 8px 20px rgba(216,49,63,.28);position:relative;overflow:hidden;transition:transform .12s}
.cta-strip a:hover{transform:translateY(-2px)}
.cta-strip a::after{content:"";position:absolute;top:0;left:-70%;width:45%;height:100%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.5),transparent);transform:skewX(-18deg);animation:shine 3.6s ease-in-out infinite;pointer-events:none}
/* footer */
footer.site{margin-top:40px;padding:26px 18px 60px;text-align:center;color:var(--muted);font-size:12.5px;line-height:2}
footer.site .fl{margin-bottom:6px}
footer.site a{color:var(--muted);margin:0 8px}
/* ===== motion ===== */
.progress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,#d8313f,#ff9a6b);z-index:60;transition:width .12s ease-out;box-shadow:0 0 8px rgba(216,49,63,.45)}
.reveal{opacity:0;transform:translateY(22px);transition:opacity .65s cubic-bezier(.2,.7,.2,1),transform .65s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
@keyframes riseIn{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.eyebrow{animation:riseIn .6s .02s both}
h1{animation:riseIn .7s .10s both}
.meta{animation:riseIn .7s .18s both}
.lead,.cathead p{animation:riseIn .7s .24s both}
@media(max-width:600px){h1{font-size:23px}article{padding:22px 16px 32px}article h2{font-size:19.5px}.cathead h1{font-size:22px}}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1!important;transform:none!important;transition:none}
  strong.mk-init{background-size:100% 100%!important}
  a.btn::after,.cta-strip a::after,.progress{display:none}
  .exwrap .stg,.eyebrow,h1,.meta,.lead,.cathead p{animation:none}
}