:root{--ink:#14213d;--txt:#1f2937;--mut:#5b6474;--acc:#fca311;--acc2:#b45309;--bg:#f7f8fa;--card:#fff;--line:#e3e6ec;--good:#15803d;--bad:#b91c1c;--blue:#1d4ed8}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,Inter,Arial,sans-serif;color:var(--txt);background:var(--bg)}
a{color:var(--blue)}a:hover{color:var(--acc2)}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:6px 10px;z-index:9}
.wrap{max-width:920px;margin:0 auto;padding:0 16px}.wrap.wide{max-width:1100px}
.site-head{background:var(--ink);color:#fff}.head-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px 20px;padding-top:10px;padding-bottom:10px}
.logo{display:flex;align-items:center;gap:8px;color:#fff;text-decoration:none;font-size:1.1rem}.logo b{color:var(--acc);font-weight:700}
.nav{display:flex;flex-wrap:wrap;gap:4px 14px}.nav a{color:#dbe2ef;text-decoration:none;font-size:.93rem;padding:4px 0}.nav a:hover,.nav a[aria-current]{color:var(--acc)}
main{padding-top:14px;padding-bottom:30px}
.crumbs{font-size:.85rem;color:var(--mut);margin:4px 0 8px}.crumbs a{color:var(--mut)}
h1{font-size:1.9rem;line-height:1.2;color:var(--ink);margin:.4em 0 .3em}h2{font-size:1.35rem;color:var(--ink);margin:1.6em 0 .5em}h3{font-size:1.1rem;color:var(--ink);margin:1.3em 0 .4em}
.lede{font-size:1.08rem;color:#374151}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px;margin:16px 0;box-shadow:0 1px 2px rgba(0,0,0,.03)}
.tool{border-top:4px solid var(--acc)}
.grid{display:grid;gap:12px}.g2{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.g3{grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}
label{display:block;font-weight:600;font-size:.9rem;color:var(--ink);margin-bottom:4px}
input,select,textarea{font:inherit;width:100%;padding:9px 10px;border:1px solid #c9ced8;border-radius:8px;background:#fff;color:var(--txt)}
input:focus,select:focus,textarea:focus{outline:2px solid var(--acc);border-color:var(--acc)}
.hint{font-size:.82rem;color:var(--mut);margin-top:3px}
.seg{display:flex;border:1px solid #c9ced8;border-radius:8px;overflow:hidden}.seg label{flex:1;margin:0;text-align:center;font-weight:500;cursor:pointer}.seg input{position:absolute;opacity:0;width:1px;height:1px}.seg span{display:block;padding:9px 6px}.seg input:checked+span{background:var(--ink);color:#fff}.seg input:focus-visible+span{outline:2px solid var(--acc)}
button,.btn{font:inherit;cursor:pointer;border:0;border-radius:8px;padding:9px 14px;background:var(--ink);color:#fff;text-decoration:none;display:inline-block}button.sec,.btn.sec{background:#e8ebf1;color:var(--ink)}button.danger{background:#fee2e2;color:var(--bad)}button:hover{filter:brightness(1.1)}
.row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.out{margin-top:14px;padding:14px;border-radius:10px;background:#fff8eb;border:1px solid #fde3b0}
.big{font-size:1.6rem;font-weight:700;color:var(--ink)}.pos{color:var(--good)}.neg{color:var(--bad)}
.kv{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px}.kv div{background:#fff;border-radius:8px;padding:8px 10px;border:1px solid var(--line)}.kv small{display:block;color:var(--mut);font-size:.78rem}
table{border-collapse:collapse;width:100%;font-size:.93rem;background:#fff}th,td{border-bottom:1px solid var(--line);padding:7px 8px;text-align:left}th{background:#f0f2f6;color:var(--ink);font-weight:600}td.n,th.n{text-align:right;font-variant-numeric:tabular-nums}
.tbl{overflow-x:auto;border:1px solid var(--line);border-radius:10px}
.formula{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:#0f172a;color:#e2e8f0;padding:12px 14px;border-radius:8px;overflow-x:auto;white-space:pre;font-size:.9rem;line-height:1.5}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:#eef1f5;padding:1px 5px;border-radius:4px;font-size:.92em}
.note{border-left:4px solid var(--acc);background:#fff;padding:10px 14px;border-radius:0 8px 8px 0;margin:14px 0}
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px;margin:14px 0}.tiles a{display:block;background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px;text-decoration:none;color:var(--txt)}.tiles a:hover{border-color:var(--acc)}.tiles strong{display:block;color:var(--ink)}.tiles span{font-size:.88rem;color:var(--mut)}
.sources{font-size:.88rem;color:#374151;border-top:1px solid var(--line);margin-top:28px}.sources .pub{color:var(--mut)}.cite-ref{font-size:.72em;line-height:0}.cite-ref a{text-decoration:none}
.faq dt{font-weight:700;color:var(--ink);margin-top:16px}.faq dd{margin:4px 0 0}
details{background:#fff;border:1px solid var(--line);border-radius:8px;padding:8px 12px;margin:8px 0}summary{cursor:pointer;font-weight:600;color:var(--ink)}
.site-foot{background:#0b1325;color:#aeb7c7;font-size:.9rem;padding:18px 0}.site-foot a{color:#dbe2ef}.small{font-size:.82rem}
.ad-slot{margin:16px auto;max-width:100%}.ad-slot:empty{display:none}
.bar{height:10px;background:#e5e7eb;border-radius:5px;overflow:hidden}.bar i{display:block;height:100%;background:var(--acc)}
.chips{display:flex;flex-wrap:wrap;gap:6px}.chip{background:#eef1f5;border-radius:999px;padding:3px 10px;font-size:.85rem;display:inline-flex;gap:6px;align-items:center}.chip button{padding:0 4px;background:none;color:var(--bad);font-size:1rem;line-height:1}
.spark{vertical-align:middle}
@media (max-width:600px){h1{font-size:1.5rem}.nav{gap:2px 10px}.nav a{font-size:.86rem}.card{padding:14px}}