*{box-sizing:border-box}
:root{
  --bg:#f1f5f9; --panel:#ffffff; --ink:#0f172a; --muted:#64748b;
  --line:#e2e8f0; --accent:#0284c7; --accent-soft:#e0f2fe;
  --good:#059669; --chip:#f8fafc; --shadow:0 8px 30px rgba(2,132,199,.08);
  --radius:16px;
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#0b1220; --panel:#111c30; --ink:#e2e8f0; --muted:#94a3b8;
    --line:#1f2f4a; --accent:#38bdf8; --accent-soft:#0c2a3f;
    --chip:#16233a; --shadow:0 8px 30px rgba(0,0,0,.4);
  }
}
html{overflow-x:hidden}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic",Meiryo,sans-serif;background:var(--bg);color:var(--ink);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
.topbar{position:sticky;top:0;z-index:20;background:var(--panel);background:color-mix(in srgb,var(--panel) 88%,transparent);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.topbar-inner{max-width:1180px;margin:0 auto;padding:10px 18px;display:flex;align-items:center;justify-content:space-between;gap:10px}
.brand{display:flex;gap:10px;align-items:center;min-width:0}
.logo{font-size:28px;background:var(--accent-soft);width:44px;height:44px;display:grid;place-items:center;border-radius:12px}
.brand strong{display:block;line-height:1.1;font-size:17px}
.brand small{color:var(--muted);font-size:12px}
.topbar-actions{display:flex;gap:8px}
.btn{border:1px solid var(--line);background:var(--panel);color:var(--ink);border-radius:10px;padding:8px 12px;cursor:pointer;font-size:14px;white-space:nowrap;flex-shrink:0}
.btn:hover{border-color:var(--accent)}
.btn.ghost{background:transparent}
.btn.small{font-size:13px;padding:6px 10px}
.btn.swap{font-size:18px;padding:8px 12px;align-self:end;height:42px;line-height:1;white-space:nowrap;flex-shrink:0}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.hero{max-width:1180px;margin:0 auto;padding:34px 18px 8px;text-align:center;position:relative}
.hero::before{content:"";position:absolute;inset:-40px 0 0;z-index:-1;background:radial-gradient(520px 180px at 20% 0%,color-mix(in srgb,var(--accent) 14%,transparent),transparent 70%),radial-gradient(620px 200px at 80% 10%,color-mix(in srgb,#a855f7 12%,transparent),transparent 70%);pointer-events:none}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;color:var(--accent);background:var(--accent-soft);border:1px solid var(--line);border-radius:999px;padding:6px 14px;margin-bottom:12px}
.eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(2,132,199,.18);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 18%,transparent)}
@supports not (background:color-mix(in srgb,red 50%,blue)){.hero::before{display:none}.cat-tab.active{background:var(--ink)}.quick:focus-within{box-shadow:none}}
.hero h1{font-size:clamp(24px,4vw,36px);line-height:1.25;margin:0 0 8px;letter-spacing:-.03em}
.hero h1 .grad{background:linear-gradient(90deg,var(--accent),#a855f7);-webkit-background-clip:text;background-clip:text;color:transparent}
.lede{color:var(--muted);margin:0 0 6px;font-size:14px}
.quick-card{max-width:720px;margin:16px auto 0;background:var(--panel);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:10px 10px 8px}
.quick{display:flex;gap:0;align-items:center;background:var(--chip);border:1px solid var(--line);border-radius:14px;padding:6px 6px 6px 12px;flex-wrap:nowrap;min-width:0}
.quick:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(2,132,199,.22);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 22%,transparent)}
.q-icon{font-size:16px;opacity:.7;margin-right:8px;flex-shrink:0}
.q-div{width:1px;align-self:stretch;background:var(--line);margin:4px 8px;flex-shrink:0}
.quick input,.quick select{background:transparent;border:none;color:var(--ink);font-size:16px;padding:10px 8px;min-width:0}
.quick input:focus,.quick select:focus{border:none;outline:none}
.quick input{width:130px;max-width:32vw;text-align:right;font-weight:800;font-variant-numeric:tabular-nums;flex-shrink:0}
.quick select{flex:1;min-width:0;max-width:100%;cursor:pointer;text-overflow:ellipsis;overflow:hidden}
.parsed-line{min-height:1.6em;margin:8px 2px 2px;color:var(--accent);font-weight:700;font-size:13.5px;line-height:1.5;overflow-wrap:anywhere}
.prec{font-size:13px;color:var(--muted);display:flex;gap:6px;align-items:center;white-space:nowrap}
.cat-tabs{display:flex;gap:8px;overflow-x:auto;padding:12px 2px 14px;scrollbar-width:none;justify-content:flex-start;max-width:100%;box-sizing:border-box;scroll-padding:0 2px}
@media(min-width:900px){.cat-tabs{justify-content:center;flex-wrap:wrap;overflow:visible}}
.cat-tabs::-webkit-scrollbar{display:none}
.cat-tab{flex:0 0 auto;border:1px solid var(--line);background:var(--panel);border-radius:999px;padding:8px 14px;cursor:pointer;font-size:14px;color:var(--ink);white-space:nowrap;transition:transform .12s ease,box-shadow .12s ease,background .12s ease}
.cat-tab:hover{transform:translateY(-1px);box-shadow:var(--shadow);border-color:var(--accent)}
.cat-tab.active{background:var(--ink);background:linear-gradient(135deg,var(--ink),color-mix(in srgb,var(--ink) 70%,var(--accent)));color:var(--bg);border-color:transparent;box-shadow:var(--shadow)}
.layout{max-width:860px;margin:0 auto;padding:6px 18px 30px;display:grid;grid-template-columns:minmax(0,1fr);gap:16px;align-items:start;box-sizing:border-box}
.col-main{min-width:0}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);margin-bottom:12px;min-width:0;overflow:hidden}
.card-head{display:flex;justify-content:space-between;align-items:center;gap:8px 10px;flex-wrap:wrap;margin-bottom:8px}
.card h2{margin:0;font-size:16px}
.head-tools{display:flex;gap:8px;align-items:center;flex-wrap:wrap;justify-content:flex-end;min-width:0}
.head-tools select,.converter select,.converter input{background:var(--chip);border:1px solid var(--line);color:var(--ink);border-radius:10px;padding:9px 10px;font-size:15px;width:100%;max-width:100%;min-width:0}
.head-tools select{width:auto}
.head-tools input[type="search"]{background:var(--chip);border:1px solid var(--line);color:var(--ink);border-radius:10px;padding:8px 10px;font-size:13px;width:150px;max-width:40vw}
.ref-count{margin:8px 2px 0}
.empty-compare{padding:14px;text-align:center;color:var(--muted);font-size:13px}
.converter{background:var(--chip);border:1px solid var(--line);border-radius:12px;padding:14px;min-width:0}
.conv-row{display:grid;grid-template-columns:1.2fr 1fr auto 1fr;gap:10px;align-items:end}
@media(max-width:640px){.conv-row{grid-template-columns:1fr 44px 1fr;gap:8px}.conv-row label:first-child{grid-column:1/-1}.conv-row label:nth-of-type(2){grid-column:1;grid-row:2}.conv-row label:nth-of-type(3){grid-column:3;grid-row:2}.btn.swap{grid-column:2;grid-row:2;justify-self:center;align-self:end;width:44px;padding:8px 0;text-align:center}}
.converter label{display:grid;gap:6px;font-size:12px;color:var(--muted);min-width:0}
.hero-result{margin-top:10px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:10px 12px;min-width:0}
.hero-result .big{font-size:clamp(18px,2.8vw,24px);font-weight:800;letter-spacing:-.02em;line-height:1.4;overflow-wrap:anywhere;word-break:break-word;animation:num-pop .22s ease}
.hero-result .big small{font-size:.55em;color:var(--muted);font-weight:600}
.hero-result .alt{color:var(--muted);font-size:13px;margin-top:2px;overflow-wrap:anywhere}
.formula{margin-top:8px;font-size:13px;color:var(--muted);overflow-wrap:anywhere;word-break:break-word}
.subhead{margin:14px 0 6px;font-size:13px;color:var(--muted)}
.subhead input[type="search"]{margin-left:8px;background:var(--chip);border:1px solid var(--line);color:var(--ink);border-radius:8px;padding:5px 9px;font-size:12.5px;width:200px;max-width:55vw;vertical-align:middle}
.units-text{font-size:12px;color:var(--muted);margin:0;line-height:1.9;overflow-wrap:anywhere}
.units-text b{color:var(--ink);font-weight:600}
.units-text .u{cursor:pointer;white-space:nowrap;display:inline-block;padding:1px 0}
.units-text .u:hover b{color:var(--accent)}
.units-text .u.current b{color:var(--accent)}
.linklike{background:none;border:none;color:var(--accent);font-size:12.5px;cursor:pointer;padding:0}
.compare-list{display:grid;gap:0;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.compare-list.is-updating{animation:cmp-swap .22s ease}
.cmp-row{display:grid;grid-template-columns:32px minmax(0,1fr) auto;gap:8px;align-items:center;padding:8px 10px;background:var(--panel);border-bottom:1px solid var(--line)}
.cmp-row .bar i{display:block;height:100%;background:var(--accent);border-radius:99px;transform-origin:left center;animation:bar-grow .35s ease}
.cmp-ratio{font-weight:800;color:var(--accent);font-variant-numeric:tabular-nums;text-align:right;line-height:1.35;max-width:42vw;overflow-wrap:anywhere;word-break:break-word;animation:num-pop .22s ease}
@keyframes cmp-swap{from{opacity:.55;transform:translateY(6px)}to{opacity:1;transform:none}}
@keyframes bar-grow{from{transform:scaleX(0)}to{transform:scaleX(1)}}
@keyframes num-pop{from{opacity:.6;transform:scale(.96)}to{opacity:1;transform:none}}
.cmp-row:last-child{border-bottom:none}
.cmp-row>div:nth-child(2){min-width:0}
.cmp-row .bar{height:5px;background:var(--line);border-radius:99px;margin-top:5px;overflow:hidden}
.cmp-name{font-weight:600;font-size:13px;overflow-wrap:anywhere;line-height:1.4}
.cmp-sub{font-size:12px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cmp-ratio small{display:block;color:var(--muted);font-weight:500;font-size:11px;overflow-wrap:anywhere}
.note{font-size:12px;color:var(--muted)}
.history{display:grid;gap:6px}
.history button{border:1px solid var(--line);background:var(--chip);color:var(--ink);border-radius:10px;padding:8px 10px;cursor:pointer;text-align:left;font-size:13px}
.history .empty{color:var(--muted);font-size:13px}
footer{text-align:center;color:var(--muted);font-size:12px;padding:20px}
.hidden{display:none!important}
.modal{position:fixed;inset:0;z-index:50;background:rgba(15,23,42,.5);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);display:flex;align-items:flex-start;justify-content:center;padding:8vh 16px 16px;box-sizing:border-box}
.modal.hidden{display:none!important}
.modal-card{background:var(--panel);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);width:min(560px,100%);max-height:80vh;display:flex;flex-direction:column;overflow:hidden;animation:pop .18s ease}
@keyframes pop{from{transform:translateY(8px) scale(.98);opacity:0}to{transform:none;opacity:1}}
.modal-head{display:flex;justify-content:space-between;align-items:center;padding:14px 16px;border-bottom:1px solid var(--line)}
.modal-head h2{margin:0;font-size:16px}
.modal-card .history{padding:14px 16px;overflow-y:auto}
.modal-foot{padding:12px 16px;border-top:1px solid var(--line);display:flex;justify-content:flex-end}
/* 共有モーダル */
.share-body{padding:14px 16px 16px;display:grid;gap:10px}
.share-summary{margin:0;font-weight:800;font-size:15px;line-height:1.5;overflow-wrap:anywhere;background:var(--chip);border:1px solid var(--line);border-radius:12px;padding:10px 12px}
.share-label{font-size:12.5px;color:var(--muted);font-weight:700}
.share-url-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px}
.share-url-row input{background:var(--chip);border:1px solid var(--line);color:var(--ink);border-radius:10px;padding:9px 10px;font-size:13px;width:100%;min-width:0}
.share-note{margin:0;font-size:12px;color:var(--muted)}
.share-note code{background:var(--chip);border:1px solid var(--line);border-radius:6px;padding:0 5px;font-size:11.5px}
.share-btns{display:flex;gap:8px;flex-wrap:wrap}
.share-btns .btn{text-decoration:none}
.share-btns.sub .btn{font-size:13px}
/* トースト */
.toast{position:fixed;left:50%;bottom:22px;transform:translateX(-50%) translateY(12px);z-index:80;background:var(--ink);color:var(--bg);font-size:13.5px;font-weight:700;border-radius:999px;padding:10px 18px;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:opacity .2s ease,transform .2s ease;max-width:min(92vw,480px);overflow-wrap:anywhere;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
@media(max-width:560px){.share-url-row{grid-template-columns:minmax(0,1fr)}.share-url-row .btn{width:100%}}
@media(max-width:560px){.quick input{width:88px;max-width:28vw;padding:10px 4px}.quick{padding:6px}.q-icon{display:none}.q-div{margin:4px 4px}.hero{padding-top:26px}.topbar-inner{padding:10px 12px}.brand strong{font-size:15px}.card{padding:12px}.converter{padding:10px}.layout{padding:6px 12px 24px}.modal{padding:4vh 10px 10px}.cmp-ratio{max-width:44vw;font-size:13px}}

.quick-title{margin:2px 4px 8px;font-size:12.5px;font-weight:700;color:var(--muted);text-align:left}
.card-desc{margin:0 0 8px;font-size:12.5px;color:var(--muted)}
.card-desc-inline{color:var(--muted);font-size:11.5px;font-weight:500;margin-left:8px}
/* 換算サブカード（折りたたみ・小さめ・メインじゃない） */
.sub-card{padding:8px 12px;background:var(--panel);background:color-mix(in srgb,var(--panel) 92%,var(--bg));box-shadow:none}
.sub-card details{margin:0}
.conv-summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:4px 2px;user-select:none}
.conv-summary::-webkit-details-marker{display:none}
.conv-summary-title{font-size:13.5px;font-weight:700;display:flex;align-items:center;min-width:0;white-space:nowrap}
.conv-summary-right{display:flex;align-items:center;gap:8px;min-width:0;margin-left:auto}
.conv-mini{font-size:12.5px;color:var(--muted);font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:52vw}
.conv-toggle{font-size:12px;color:var(--muted);transition:transform .15s ease;flex-shrink:0}
details[open] .conv-toggle{transform:rotate(180deg)}
.conv-body{padding-top:8px}
.sub-tools{justify-content:flex-end;margin-bottom:8px}
.sub-card .converter{padding:10px}
.sub-card .hero-result .big{font-size:16px}
.sub-card .formula{font-size:12px}
.sub-card .units-text{font-size:11.5px}
/* キーボード操作の可視フォーカス */
.btn:focus-visible,.cat-tab:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid color-mix(in srgb,var(--accent) 60%,transparent);outline-offset:2px}
.layout-wide{max-width:1180px}
/* デスクトップも換算↑・例え↓の縦並び（1カラム） */
@media(min-width:1000px){
  .layout{max-width:860px}
  .col-main{display:grid;grid-template-columns:minmax(0,1fr);gap:16px;align-items:start}
  .col-main .card{margin-bottom:12px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}