:root{--paper:#f2f5f9;--paper2:#e3e9f1;--ink:#1d2733;--ink2:#566478;--line:rgba(29,39,51,.2);--card:#fff;--accent:#2a6fb8;--gold:#c8901c;--red:#c0453a;--shadow:0 2px 0 rgba(29,39,51,.12),0 6px 16px rgba(29,39,51,.1)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);font-family:"Zen Maru Gothic","Hiragino Maru Gothic ProN","Noto Sans JP",sans-serif;line-height:1.85;font-size:16.5px;
 background:var(--paper) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='40' height='40'><path d='M40 0H0V40' fill='none' stroke='%23b9c6d8' stroke-width='1' opacity='.5'/></svg>")}
h1,h2,h3,.serif{font-family:"Shippori Mincho","Hiragino Mincho ProN",serif}
a{color:inherit}
.wrap{max-width:820px;margin:0 auto;padding:0 18px}
.top{padding:22px 0 8px;text-align:center}
.top .kick{letter-spacing:.3em;font-size:12px;color:var(--ink2)}
.top h1{margin:.1em 0;font-size:clamp(30px,6vw,46px);font-weight:800;letter-spacing:.08em}
.top h1 em{font-style:normal;color:var(--accent)}
.top p{margin:.3em 0;color:var(--ink2)}
.stats{display:inline-flex;gap:10px;margin-top:8px;font-size:13px;background:var(--card);border:1px solid var(--line);border-radius:99px;padding:4px 14px;box-shadow:var(--shadow)}
.stats b{color:var(--accent);font-size:17px}
h2.sh{font-size:19px;margin:26px 0 8px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.chip{font:inherit;font-size:14px;border:2px solid var(--ink);background:var(--card);border-radius:99px;padding:3px 13px;cursor:pointer;box-shadow:0 2px 0 var(--ink)}
.chip.on{background:var(--ink);color:#fff}
.chip:active{transform:translateY(2px);box-shadow:none}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px;margin:12px 0 30px}
.card{display:block;text-decoration:none;background:var(--card);border:2px solid var(--ink);border-radius:14px;overflow:hidden;box-shadow:0 4px 0 var(--ink);transition:.15s;position:relative}
.card:hover{transform:translateY(-3px);box-shadow:0 7px 0 var(--ink)}
.card .band{background:var(--accent);color:#fff;padding:5px 12px;font-size:13px;display:flex;justify-content:space-between;gap:8px}
.card .body{padding:10px 14px 14px}
.card h3{margin:0 0 4px;font-size:17px;line-height:1.5}
.card p{margin:0;font-size:14px;color:var(--ink2);line-height:1.6}
.card.stub{opacity:.55;box-shadow:none}
.card.lab .band{background:var(--ink)}
.stamp{position:absolute;right:8px;bottom:6px;font-size:12px;color:#fff;background:var(--red);border-radius:50%;width:46px;height:46px;display:grid;place-items:center;transform:rotate(-14deg);font-weight:800;border:2px dashed #fff;outline:2px solid var(--red)}
.badge{font-size:11px;border:1px solid currentColor;border-radius:6px;padding:0 6px;opacity:.85;margin-left:4px}
.hero{background:var(--accent);color:#fff;padding:26px 0 30px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='260' height='260'><g fill='none' stroke='white' stroke-width='1.2' opacity='.18'><circle cx='200' cy='60' r='30'/><circle cx='200' cy='60' r='55'/><circle cx='200' cy='60' r='80'/><circle cx='200' cy='60' r='105'/></g></svg>") right top/260px no-repeat}
.hero .wrap{position:relative;z-index:1}
.hero .meta{font-size:13px;opacity:.92;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.hero .em{font-size:40px;line-height:1.1}
.hero h1{margin:.2em 0 .3em;font-size:clamp(24px,5vw,36px);line-height:1.4}
.hero .q{font-size:17px;background:#0002;border-left:5px solid #fff;padding:6px 12px;border-radius:0 10px 10px 0}
.back{display:inline-block;margin:10px 0;font-size:14px;text-decoration:none;color:var(--ink2)}
.sec{margin:26px 0}
.sec>h2{font-size:19px;margin:0 0 10px;display:flex;align-items:center;gap:8px}
.sec>h2::before{content:"";width:10px;height:22px;background:var(--accent);border-radius:3px}
.panel{background:var(--card);border:2px solid var(--ink);border-radius:14px;padding:14px 16px;box-shadow:0 4px 0 var(--ink)}
.opt{display:block;width:100%;text-align:left;font:inherit;border:2px solid var(--ink);background:#fff;border-radius:12px;padding:8px 14px;margin:8px 0;cursor:pointer;box-shadow:0 3px 0 var(--ink)}
.opt:hover{background:#eef4fb}
.opt.ok{background:#d8f1e2;border-color:#2f7d5b}
.opt.ng{background:#fbe0dc;border-color:var(--red)}
.opt[disabled]{cursor:default}
.why{margin-top:8px;padding:8px 12px;background:#fff6d8;border-radius:10px;font-size:15px;display:none}
.why.show{display:block}
.step{display:flex;gap:12px;margin:14px 0}
.step .n{flex:none;width:38px;height:38px;border-radius:50%;background:var(--accent);color:#fff;display:grid;place-items:center;font-weight:800;box-shadow:0 3px 0 var(--ink);border:2px solid var(--ink)}
.step .c{background:var(--card);border:2px solid var(--ink);border-radius:14px;padding:10px 14px;flex:1;box-shadow:0 3px 0 var(--ink)}
.step h3{margin:0 0 3px;font-size:17px}
.step p{margin:0}
.one{background:var(--ink);color:#fff;padding:14px 18px;border-radius:14px;font-size:18px;font-weight:700;text-align:center}
.one small{display:block;font-size:12px;opacity:.7;letter-spacing:.2em}
.fun{background:#fff6d8;border:2px dashed var(--gold);border-radius:14px;padding:12px 16px}
.tips{margin:0;padding-left:1.2em}
.tips li{margin:6px 0}
.danger{background:#fdecea;border:3px solid var(--red);border-radius:14px;padding:12px 16px}
.danger h2{color:var(--red)}
.danger li{margin:6px 0}
.danger small{display:block;color:var(--ink2)}
.tag{display:inline-block;font-size:12px;background:var(--paper2);border-radius:6px;padding:1px 8px;color:var(--ink2)}
.nums{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px}
.num{background:var(--card);border:2px solid var(--ink);border-radius:12px;padding:8px 12px}
.num .v{font-weight:800;font-size:18px;color:var(--accent)}
.num .a{font-size:12px;color:var(--ink2)}
details{background:var(--card);border:2px solid var(--line);border-radius:12px;padding:8px 14px;margin:8px 0}
summary{cursor:pointer;font-weight:700}
.result{text-align:center;font-weight:800;margin-top:6px;color:#2f7d5b}
footer{text-align:center;font-size:12px;color:var(--ink2);padding:30px 0}
/* simulators */
.sim{background:#fff;border:2px solid var(--ink);border-radius:14px;padding:12px 14px;box-shadow:0 4px 0 var(--ink)}
.sim .row{display:flex;align-items:center;gap:10px;margin:8px 0;flex-wrap:wrap}
.sim label{font-size:14px;min-width:7em}
.sim input[type=range]{flex:1;min-width:140px;accent-color:var(--accent)}
.sim input[type=number]{width:5.5em;font:inherit;padding:2px 6px;border:2px solid var(--ink);border-radius:8px}
.sim select{font:inherit;padding:2px 6px;border:2px solid var(--ink);border-radius:8px;background:#fff}
.sim .val{font-weight:800;min-width:5em;text-align:right}
.sim .out{background:var(--paper);border-radius:10px;padding:8px 12px;margin-top:8px}
.sim .big{font-size:24px;font-weight:800;color:var(--accent)}
.sim svg{width:100%;height:auto;display:block;background:var(--paper);border-radius:10px}
.sim table{width:100%;border-collapse:collapse;font-size:14px}
.sim td,.sim th{padding:4px 4px;border-bottom:1px solid var(--line);text-align:left}
.sim td.r{text-align:right;white-space:nowrap}
.sim .note{font-size:12.5px;color:var(--ink2);margin-top:6px}
.bar{height:22px;background:var(--paper2);border-radius:11px;overflow:hidden;border:2px solid var(--ink)}
.bar i{display:block;height:100%;background:var(--accent);transition:width .2s}
.bar i.over{background:var(--red)}
@media(max-width:560px){body{font-size:16px}.step .n{width:32px;height:32px}.sim label{min-width:100%}}
/* ---- 2026-11-09 トップ再設計: 実験台のヒーロー・サムネイル付きカード・線画アイコン ---- */
.ic{width:1.15em;height:1.15em;vertical-align:-.2em;flex:none}
.hero .em .ic{width:40px;height:40px}
.hero0{background:radial-gradient(120% 90% at 20% 0,#2a6aa3 0,#173c60 55%,#0f2740 100%);color:#fff;padding:26px 0 6px;position:relative;border-bottom:4px solid var(--ink);overflow:hidden}
.hero0 .top,.hero0 .wrap{position:relative}
.hero0 .kick{letter-spacing:.3em;font-size:12px;color:#cfe8ff;text-align:center}
.hero0 h1{margin:.1em 0;font-size:clamp(34px,7vw,54px);font-weight:800;letter-spacing:.08em;text-align:center}
.hero0 h1 em{font-style:normal;color:#ffc857}
.hero0 p{margin:.2em 0 .6em;color:#dbeaf8;text-align:center}
.hero0 .stats{display:flex;width:max-content;margin:6px auto 0;background:#ffffff1f;border-color:#ffffff55;color:#fff;box-shadow:none}
.hero0 .stats b{color:#ffc857}
.stage{padding:4px 18px 0;max-width:900px}
#hs{width:100%;height:auto;display:block;touch-action:none}
#bob{touch-action:none}
h2.sh{display:flex;align-items:center;gap:8px}
h2.sh .ic{width:26px;height:26px;color:var(--accent)}
.card{border-radius:16px;background:#fffdf8}
.card .thumb{position:relative;height:118px;background:var(--accent) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='24' height='24'><path d='M24 0H0V24' fill='none' stroke='white' stroke-opacity='.16'/></svg>");display:grid;place-items:center;border-bottom:2px solid var(--ink)}
.card .thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,#fff0 55%,#0002)}
.card .th{width:78%;height:100%;position:relative;z-index:1;filter:drop-shadow(0 2px 0 #0003)}
.card .th .y{stroke:#ffd56b}
.card .tag2{position:absolute;right:8px;top:8px;z-index:2;font-size:11px;background:#fff;color:var(--ink);border:1.5px solid var(--ink);border-radius:99px;padding:0 9px;font-weight:700}
.card .pill{display:inline-flex;align-items:center;gap:4px;font-size:12px;color:var(--accent);font-weight:700}
.card .pill .ic{width:15px;height:15px}
.chip{display:inline-flex;align-items:center;gap:5px}
.chip .ic{width:16px;height:16px}
.card:nth-child(odd):hover{transform:translateY(-3px) rotate(-.6deg)}.card:nth-child(even):hover{transform:translateY(-3px) rotate(.6deg)}
@media(max-width:520px){.hero0{padding-top:18px}.card .thumb{height:104px}}
@media(max-width:520px){#labs.grid{grid-template-columns:1fr 1fr;gap:10px}#labs .card .thumb{height:84px}#labs .card h3{font-size:14.5px}#labs .card .body{padding:8px 10px 12px}}
svg.ic,#sim svg.ic,td svg.ic,label svg.ic{width:1.2em;height:1.2em;min-width:1.2em;max-width:none;display:inline-block;vertical-align:-.25em;color:var(--ink2)}
table.uni{border-collapse:collapse;margin:6px 0}table.uni td{padding:3px 12px 3px 0;font-size:16px}table.uni td.big{font-size:26px;font-weight:700;color:var(--accent)}.sim select{font:inherit;border:2px solid var(--ink);border-radius:10px;padding:5px 8px;background:#fff}

/* Codex製SVGのスタイル（線の太さ・色はここで統一） */
.card .th{display:block;width:78%;height:100%;position:relative;z-index:1;filter:none}
.card .th svg{display:block;width:100%;height:100%;fill:none;stroke:#fff;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.card .th svg .s{stroke:#fff;stroke-opacity:.5;stroke-width:1.2}
.card .th svg .y{stroke:#ffd56b}
.card .th svg .f{fill:#fff;stroke:none}
.card .th svg .fy{fill:#ffd56b;stroke:none}
.ic[viewBox]{stroke:currentColor}

/* ヒーロー（Codex製）: 線の太さ・色 */
#hs g{stroke:#cfe8ff;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
#hs .s{stroke:#cfe8ff;stroke-opacity:.5;stroke-width:1.3}
#hs .y{stroke:#ffc857;stroke-width:3}
#hs .f{fill:#cfe8ff;stroke:none}
#hs .fy{fill:#ffc857;stroke:#fff;stroke-width:1.6}
#hs circle.fy[r="5.5"]{stroke:none}
#hs path.fy{stroke:none}
#hs .w{stroke:#7fd3ff;stroke-width:2.4}
#hs .water{fill:#7fd3ff;fill-opacity:.22;stroke:none}
#hs .lbl{fill:#cfe8ff;stroke:none;font-family:"Zen Maru Gothic",sans-serif;font-size:22px;font-weight:700}

/* ---- 読みもの（コラム）・おまけのラボ ---- */
.sub{margin:-4px 0 12px;color:var(--ink2);font-size:14.5px}
.cols{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:12px 0 34px}
.ccard{display:grid;grid-template-columns:1fr;text-decoration:none;background:#fffdf8;border:2px solid var(--ink);border-radius:16px;overflow:hidden;box-shadow:0 4px 0 var(--ink);transition:.15s}
.ccard:hover{transform:translateY(-3px);box-shadow:0 7px 0 var(--ink)}
.ccard.lead{grid-column:1/-1;grid-template-columns:1.1fr 1fr}
.ccard .cth{background:#173c60 url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='24' height='24'><path d='M24 0H0V24' fill='none' stroke='white' stroke-opacity='.14'/></svg>");display:grid;place-items:center;min-height:130px;border-bottom:2px solid var(--ink)}
.ccard.lead .cth{border-bottom:0;border-right:2px solid var(--ink);min-height:230px}
.ccard .cth .th{display:block;width:70%;height:100%;max-height:200px}
.ccard .cth .th svg{display:block;width:100%;height:100%;fill:none;stroke:#fff;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.ccard .cth .th svg .s{stroke-opacity:.5;stroke-width:1.2}.ccard .cth .th svg .y{stroke:#ffd56b}.ccard .cth .th svg .f{fill:#fff;stroke:none}.ccard .cth .th svg .fy{fill:#ffd56b;stroke:none}
.ccard .cbody{padding:16px 18px 18px}
.ccard .pill{display:inline-flex;align-items:center;gap:4px;font-size:12px;font-weight:700;color:#8a5a2b}.ccard .pill .ic{width:15px;height:15px}
.ccard h3{margin:4px 0 6px;font-size:19px;line-height:1.5}.ccard.lead h3{font-size:24px}
.ccard p{margin:0 0 8px;color:var(--ink2);font-size:14.5px;line-height:1.75}
.ccard .more{font-weight:700;font-size:13px;color:var(--accent)}
details.omake{margin:30px 0;border:2px dashed var(--line);border-radius:14px;padding:6px 14px;background:#ffffff80}
details.omake summary{cursor:pointer;font-weight:700;font-size:14.5px;color:var(--ink2);padding:6px 0;display:flex;align-items:center;gap:6px}
details.omake summary .ic{width:18px;height:18px}
.labs{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:8px;padding:8px 0 10px}
.lab-s{display:flex;align-items:center;gap:8px;text-decoration:none;font-size:13.5px;line-height:1.4;padding:8px 10px;border:1.5px solid var(--line);border-radius:10px;background:#fff}
.lab-s:hover{border-color:var(--ink)}.lab-s .ic{width:18px;height:18px;flex:none;color:var(--ink2)}
.chero{background:radial-gradient(120% 100% at 15% 0,#26577e 0,#173c60 60%,#0f2740 100%);color:#fff;padding:26px 0 30px;border-bottom:4px solid var(--ink)}
.chero .cw{display:grid;grid-template-columns:1fr 280px;gap:24px;align-items:center}
.chero .meta{display:flex;gap:8px;align-items:center;font-size:13px;opacity:.9}.chero .meta .ic{width:18px;height:18px}
.chero h1{margin:.3em 0 .4em;font-size:clamp(26px,5vw,40px);line-height:1.4}
.chero .lead{margin:0;font-size:17px;line-height:1.9;color:#dbeaf8}
.chero .cart .th{display:block;width:100%}
.chero .cart .th svg{display:block;width:100%;height:auto;fill:none;stroke:#fff;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.chero .cart .th svg .s{stroke-opacity:.5;stroke-width:1.2}.chero .cart .th svg .y{stroke:#ffd56b}.chero .cart .th svg .f{fill:#fff;stroke:none}.chero .cart .th svg .fy{fill:#ffd56b;stroke:none}
.col{max-width:700px}
.csec h2{font-size:22px;margin:34px 0 8px;padding-left:12px;border-left:5px solid #8a5a2b}
.csec p{font-size:17.5px;line-height:2.05;margin:.7em 0;font-family:"Zen Maru Gothic","Hiragino Maru Gothic ProN",sans-serif}
.pq{margin:30px 0;padding:18px 22px;border-left:6px solid var(--gold);background:#fff7e0;font-size:21px;line-height:1.8;color:#5a3d12}
.nextlist{display:grid;gap:8px}.lab-s.next{padding:12px 14px}.lab-s.next small{display:block;color:var(--ink2);font-size:12.5px}
@media(max-width:700px){.cols{grid-template-columns:1fr}.ccard.lead{grid-template-columns:1fr}.ccard.lead .cth{border-right:0;border-bottom:2px solid var(--ink);min-height:150px}.ccard.lead h3{font-size:21px}.chero .cw{grid-template-columns:1fr}.chero .cart{max-width:260px}}

.morecols{grid-column:1/-1;border:2px solid var(--ink);border-radius:14px;background:#fffdf8;box-shadow:0 4px 0 var(--ink);padding:4px 16px}
.morecols summary{cursor:pointer;font-weight:700;padding:12px 0;font-size:15.5px}
.clist{display:grid;grid-template-columns:repeat(2,1fr);gap:4px 22px;padding:6px 0 14px}
.crow{display:grid;grid-template-columns:92px 1fr;gap:12px;align-items:center;text-decoration:none;padding:8px 0;border-top:1px dashed var(--line)}
.crow .rth{display:block;background:#173c60;border-radius:8px;height:54px;padding:3px}
.crow .rth .th{display:block;width:100%;height:100%}
.crow .rth .th svg{display:block;width:100%;height:100%;fill:none;stroke:#fff;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.crow .rth .th svg .s{stroke-opacity:.5;stroke-width:1.4}.crow .rth .th svg .y{stroke:#ffd56b}.crow .rth .th svg .f{fill:#fff;stroke:none}.crow .rth .th svg .fy{fill:#ffd56b;stroke:none}
.crow .rt b{display:block;font-size:15px;line-height:1.5}.crow .rt small{display:block;color:var(--ink2);font-size:12.5px;line-height:1.55;margin-top:2px}
.crow:hover .rt b{color:var(--accent)}
@media(max-width:700px){.clist{grid-template-columns:1fr}}
.trysec{border-top:1px dashed var(--line,#c9d3e0);padding-top:18px}
.trylead{margin:0 0 12px;color:var(--mute,#5b6b7f);font-size:.95rem}

.cols{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.fcard{display:flex;flex-direction:column;gap:5px;padding:13px 15px;background:#fff;border:2px solid var(--ink);border-radius:12px;text-decoration:none;color:inherit}
.fcard:hover{box-shadow:0 4px 0 var(--ink);transform:translateY(-2px)}
.fcard .fno{font-size:11px;font-weight:700;color:var(--accent)}
.fcard b{font-size:15px;line-height:1.5}
.fcard .fb{font-size:12.5px;line-height:1.65;color:var(--ink2)}
.fcard.first{grid-column:1/-1;background:#fffbea}
.fcard.first b{font-size:18px}
@media(max-width:900px){.cols{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.cols{grid-template-columns:1fr}}

.chips{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0 6px}
a.chip{text-decoration:none;color:inherit}
.psec{margin:26px 0 10px;scroll-margin-top:12px}
.phead{display:flex;align-items:baseline;gap:10px;margin:0 0 12px;padding-bottom:8px;border-bottom:3px solid var(--accent,var(--ink));font-size:21px}
.phead small{font-size:12.5px;font-weight:600;color:var(--ink2)}
.card .thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.chero .cart img{display:block;width:100%;height:auto;border-radius:10px}
.rpt{font-size:.85rem;color:var(--muted,#6b7280);margin:28px auto 8px;text-align:center}
.rpt a{text-decoration:underline}