/* コラム共通: 本文1カラム(約40字幅)+目次。トップと同じトークン */
:root{
  color-scheme:light;
  --bg:#ffffff; --ink:#1a1a1c; --sub:#6b6760; --line:#e2ded3;
  --sand:#eeecdd; --sand2:#f6f4ec; --night:#0b1020;
  --red:#a3223a; --blue:#7fb0d6; --red-soft:#f6e7ea; --blue-soft:#e9f1f8;
  --iri:linear-gradient(90deg,#8fd3d1 0%,#a9b7f0 38%,#d6a6e6 68%,#f2a7b5 100%);
  --f-en:"Montserrat","Helvetica Neue",Arial,sans-serif;
  --f-body:"Zen Kaku Gothic New","Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;
  padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:17px;line-height:2;letter-spacing:.03em;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--red)}
a:focus-visible,.btn:focus-visible{outline:2px solid var(--red);outline-offset:3px}
.wrap{max-width:1120px;margin:0 auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}
.adbar{background:var(--sand2);font-size:11.5px;color:var(--sub);letter-spacing:.06em}
.adbar .wrap{padding-block:6px}
.adbar p{margin:0}
.brand{display:flex;align-items:center;gap:14px;flex-wrap:wrap;min-width:0}
.logo-tag{margin:0;font-size:12px;color:var(--sub);letter-spacing:.08em}
.meta .pr{color:#4a4740}
.idx-hero .pr-line{font-size:12px;margin-top:12px}
header.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:30;background:#fff}
header.top .wrap{display:flex;justify-content:space-between;align-items:center;padding-block:14px;gap:16px}
.logo{display:inline-flex;align-items:center;gap:10px;font-family:var(--f-en);font-weight:400;letter-spacing:.26em;font-size:14px;color:var(--ink);text-decoration:none;white-space:nowrap}
.logo-mark{width:22px;height:22px;flex:none}
.logo-mark .q{stroke:var(--red)}
.logo span{color:var(--red);font-weight:600;letter-spacing:.04em}
nav.toc{display:flex;gap:22px;font-family:var(--f-en);font-size:11px;letter-spacing:.2em}
nav.toc a{color:var(--sub);text-decoration:none}
nav.toc a:hover{color:var(--red)}
nav.toc a.cta{color:#fff;background:var(--ink);padding:6px 14px}

/* article hero */
.a-hero{position:relative;min-height:clamp(320px,40vw,460px);display:grid;align-items:end;overflow:hidden;background:var(--sand2)}
.a-hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.a-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(255,255,255,0) 10%,rgba(255,255,255,.9) 62%,#fff 92%)}
.a-hero .wrap{position:relative;z-index:1;width:100%;padding-block:40px 28px}
.crumb{font-size:12.5px;color:var(--sub);margin-bottom:14px}
.crumb a{color:var(--sub);text-decoration:none}
.crumb a:hover{color:var(--red)}
.a-no{font-family:var(--f-en);font-size:13px;letter-spacing:.24em;color:var(--red);margin:0 0 8px}
.a-hero h1{margin:0;font-size:clamp(24px,3.6vw,38px);line-height:1.5;font-weight:700;letter-spacing:.04em;text-wrap:balance;max-width:24em}
.meta{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:12.5px;color:var(--sub);margin-top:16px}

/* layout */
.a-body{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:64px;padding-block:40px 96px;align-items:start}
.a-main{min-width:0;max-width:720px}
.a-side{position:sticky;top:90px;display:grid;gap:20px}
.toc-box{border-top:2px solid var(--ink);padding-top:14px;font-size:13.5px;line-height:1.7}
.toc-box p{margin:0 0 10px;font-family:var(--f-en);font-size:11px;letter-spacing:.24em;color:var(--sub)}
.toc-box ol{margin:0;padding-left:1.3em;display:grid;gap:8px}
.toc-box a{color:var(--ink);text-decoration:none}
.toc-box a:hover{color:var(--red)}

/* summary */
.summary{background:var(--sand2);padding:24px 28px;margin-bottom:48px}
.summary .sum-h{margin:0 0 10px;font-size:15px;letter-spacing:.14em;font-family:var(--f-en);font-weight:500;color:var(--red)}
.summary ul{margin:0;padding-left:1.2em;display:grid;gap:6px;font-size:15.5px;line-height:1.85}

/* prose */
.a-main h2{font-size:clamp(21px,2.6vw,26px);line-height:1.55;margin:64px 0 20px;padding-top:22px;border-top:1px solid var(--ink);font-weight:700;scroll-margin-top:90px;text-wrap:balance}
.a-main h2 .en{display:block;font-family:var(--f-en);font-weight:400;font-size:12px;letter-spacing:.26em;color:var(--red);margin-bottom:6px;text-transform:uppercase}
.a-main h3{font-size:18.5px;line-height:1.6;margin:40px 0 12px;font-weight:700}
.a-main p{margin:0 0 1.2em}
.a-main ul,.a-main ol{padding-left:1.3em;margin:0 0 1.4em;display:grid;gap:6px}
.a-main strong{background:linear-gradient(transparent 64%,rgba(163,34,58,.14) 64%)}
sup.ref a{font-family:var(--f-en);font-size:11px;text-decoration:none;color:var(--red);padding-left:1px}
.fig{margin:32px 0;background:var(--sand2);padding:22px}
.fig .t{font-size:14px;font-weight:700;margin:0 0 10px}
.fig svg{width:100%;height:auto;display:block}
.fig .c{font-size:12px;color:var(--sub);margin:10px 0 0;line-height:1.7}
.table-wrap{overflow-x:auto;margin:28px 0}
table{border-collapse:collapse;width:100%;font-size:14.5px;line-height:1.7;min-width:520px}
th,td{border-bottom:1px solid var(--line);padding:12px 12px;text-align:left;vertical-align:top}
th{background:var(--sand2);font-weight:700;font-size:13.5px}
td.num{font-variant-numeric:tabular-nums;white-space:nowrap}
.evidence{display:inline-block;font-size:11px;letter-spacing:.1em;padding:2px 8px;border-radius:99px;font-weight:700;white-space:nowrap}
.ev-a{background:var(--red);color:#fff}.ev-b{background:var(--blue);color:#fff}.ev-c{background:var(--line);color:var(--ink)}
.callout{border-left:3px solid var(--red);background:var(--red-soft);padding:16px 20px;margin:28px 0;font-size:15.5px}
.callout.blue{border-left-color:var(--blue);background:var(--blue-soft)}
.callout b{display:block;margin-bottom:4px}
.study{border:1px solid var(--line);padding:18px 20px;margin:24px 0;font-size:15px;display:grid;gap:4px}
.study .s-h{font-family:var(--f-en);font-size:11px;letter-spacing:.2em;color:var(--red);font-weight:600}
.study .s-t{font-weight:700}
.study .s-d{color:var(--sub);font-size:14px}
.howto{background:var(--night);color:#e9ecf6;padding:28px;margin:40px 0}
.howto h3{color:#fff;margin-top:0}
.howto ol{color:#d5daea}
.howto::before{content:"";display:block;height:3px;background:var(--iri);margin:-28px -28px 24px}

/* pick */
.pick{margin:40px 0;display:grid;grid-template-columns:140px minmax(0,1fr);gap:20px;align-items:center;padding:18px;border:1px solid var(--line)}
.pick .thumb{aspect-ratio:6/5;overflow:hidden;background:var(--sand2)}
.pick .thumb img{width:100%;height:100%;object-fit:cover}
.pick .k{font-family:var(--f-en);font-size:11px;letter-spacing:.24em;color:var(--red);font-weight:600;margin:0}
.pick b{display:block;font-size:16.5px;line-height:1.6}
.pick .d{font-size:14px;color:var(--sub);line-height:1.8;margin:4px 0 10px}
.btn{display:inline-flex;align-items:center;gap:10px;padding:11px 20px;background:var(--red);color:#fff;text-decoration:none;font-size:13.5px;font-weight:700;letter-spacing:.1em;border-radius:999px}
.btn::after{content:"";width:7px;height:7px;border-top:2px solid currentColor;border-right:2px solid currentColor;transform:rotate(45deg)}
.btn:hover{background:#7f172b}

/* refs */
.refs{margin-top:72px;border-top:1px solid var(--ink);padding-top:22px}
.refs h2{margin:0 0 14px!important;border:0!important;padding:0!important;font-size:17px!important}
.refs ol{font-size:13px;line-height:1.8;color:#45423c;display:grid;gap:8px;padding-left:1.6em;word-break:break-word}
.refs li{scroll-margin-top:90px}
.refs li:target{background:var(--red-soft)}
.disclaimer{font-size:12.5px;color:var(--sub);margin-top:28px;line-height:1.8}

/* related + index cards */
.related{background:var(--sand2);padding-block:72px}
.related h2{font-family:var(--f-en);font-weight:300;letter-spacing:.14em;font-size:26px;margin:0 0 28px;text-align:center}
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{background:var(--bg);text-decoration:none;color:var(--ink);display:grid;grid-template-rows:auto 1fr;min-width:0}
.card .ph{aspect-ratio:16/10;overflow:hidden;background:var(--sand)}
.card .ph img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.card:hover .ph img{transform:scale(1.04)}
.card .tx{padding:18px 20px 22px;display:grid;gap:8px;align-content:start}
.card .no{font-family:var(--f-en);font-size:11px;letter-spacing:.24em;color:var(--red)}
.card h3{margin:0;font-size:16.5px;line-height:1.6;font-weight:700}
.card p{margin:0;font-size:13.5px;color:var(--sub);line-height:1.8}

.idx-hero{padding-block:72px 40px;text-align:center}
.idx-hero .en{font-family:var(--f-en);font-weight:300;font-size:clamp(30px,5vw,52px);letter-spacing:.16em;margin:0}
.idx-hero h1{font-size:clamp(20px,2.6vw,26px);margin:10px 0 16px;font-weight:700}
.idx-hero p{color:var(--sub);max-width:36em;margin:0 auto;font-size:15.5px}
.idx-list{padding-bottom:96px}
.ev-legend{display:flex;flex-wrap:wrap;gap:12px 20px;justify-content:center;font-size:12.5px;color:var(--sub);margin:22px 0 0}

footer{background:var(--night);color:#aab1c7}
footer .wrap{padding-block:44px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;font-size:12px}
footer .logo{color:#fff}
footer .logo-mark .q{stroke:#e0566f}
footer .logo span{color:#e0566f}
footer p{margin:8px 0 0;font-size:11px;color:#8890a8}

@media (max-width:960px){.a-body{grid-template-columns:1fr;gap:0}.a-side{display:none}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:640px){body{font-size:16px}.cards{grid-template-columns:1fr}.pick{grid-template-columns:100px minmax(0,1fr)}nav.toc a:not(.cta){display:none}.brand{flex-direction:column;align-items:flex-start;gap:2px}.logo-tag{font-size:11px}.summary{padding:20px}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

.a-main .h2-en{margin:64px 0 0;padding-top:22px;border-top:1px solid var(--ink);font-family:var(--f-en);font-size:12px;letter-spacing:.26em;color:var(--red);text-transform:uppercase;line-height:1.6}
.a-main .h2-en + h2{margin-top:6px;padding-top:0;border-top:0}
.related h2{font-family:var(--f-body);font-weight:700;letter-spacing:.1em;font-size:22px}
.idx-h2{font-size:18px;margin:0 0 24px;font-weight:700;letter-spacing:.08em}