:root{--bg:#fbfaf7;--fg:#1d2330;--muted:#5a6272;--line:#dcd8cf;--card:#fff;--accent:#0b6e4f;--accent-2:#e9f5ef;--warn:#8a5a00;--warn-bg:#fff6e0;--radius:10px;--max:1080px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--fg);background:var(--bg)}
a{color:var(--accent)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #f0b429;outline-offset:2px}
.skip{position:absolute;left:-999px;top:0;background:#000;color:#fff;padding:.5rem 1rem;z-index:10}
.skip:focus{left:0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 1rem}
header.site{background:#fff;border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.5rem;padding-top:.7rem;padding-bottom:.7rem}
.brand{font-weight:800;font-size:1.15rem;color:var(--fg);text-decoration:none;letter-spacing:-.01em}
.brand span{color:var(--accent)}
nav.main ul{list-style:none;display:flex;flex-wrap:wrap;gap:.25rem 1rem;margin:0;padding:0}
nav.main a{text-decoration:none;color:var(--fg);font-size:.95rem}
nav.main a[aria-current=page]{color:var(--accent);font-weight:700}
main{padding:1.5rem 0 3rem}
h1{font-size:clamp(1.6rem,3.5vw,2.3rem);line-height:1.2;margin:.2rem 0 .5rem;letter-spacing:-.02em}
h2{font-size:1.35rem;margin:2rem 0 .6rem}
h3{font-size:1.05rem;margin:1.2rem 0 .4rem}
.lede{font-size:1.08rem;color:var(--muted);max-width:52rem}
.checked{display:inline-block;background:var(--accent-2);color:var(--accent);font-weight:600;font-size:.85rem;border-radius:999px;padding:.15rem .7rem}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1rem 1.1rem}
.calc{display:grid;grid-template-columns:minmax(260px,340px) 1fr;gap:1.2rem;margin-top:1rem}
@media (max-width:760px){.calc{grid-template-columns:1fr}}
fieldset{border:0;margin:0;padding:0}
legend{font-weight:700;margin-bottom:.4rem}
.field{margin:.55rem 0}
.field label{display:block;font-weight:600;font-size:.92rem;margin-bottom:.2rem}
.field .hint{display:block;color:var(--muted);font-size:.82rem;margin-top:.15rem}
input[type=number],select{width:100%;padding:.55rem .6rem;font:inherit;border:1px solid #b9b4a8;border-radius:8px;background:#fff}
.money{position:relative}
.money::before{content:"$";position:absolute;left:.6rem;top:50%;transform:translateY(-50%);color:var(--muted)}
.money input{padding-left:1.4rem}
.check{display:flex;gap:.5rem;align-items:flex-start;margin:.5rem 0;font-size:.92rem}
.check input{margin-top:.25rem}
table{width:100%;border-collapse:collapse;font-size:.95rem}
caption{text-align:left;font-weight:700;padding-bottom:.4rem}
th,td{padding:.5rem .55rem;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{font-size:.85rem;color:var(--muted);font-weight:700}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
tr.best td{background:var(--accent-2)}
tr.best td:first-child{font-weight:800}
.tablewrap{overflow-x:auto}
.badge{display:inline-block;font-size:.72rem;font-weight:700;background:var(--accent);color:#fff;border-radius:4px;padding:.05rem .35rem;margin-left:.35rem;vertical-align:middle}
details{margin:.3rem 0}
details summary{cursor:pointer;color:var(--accent)}
.breakdown{font-size:.88rem;color:var(--muted);margin:.3rem 0 0;padding-left:1.1rem}
.note{background:var(--warn-bg);color:#5c3d00;border-left:4px solid #e0a100;padding:.7rem .9rem;border-radius:6px;font-size:.92rem}
.sources{font-size:.9rem}
.sources li{margin:.2rem 0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:.8rem}
.grid a.card{text-decoration:none;color:var(--fg)}
.grid a.card strong{color:var(--accent)}
.aff{display:inline-block;padding:.45rem .8rem;border-radius:8px;background:var(--accent);color:#fff;text-decoration:none;font-weight:600;font-size:.9rem}
footer.site{border-top:1px solid var(--line);background:#fff;padding:1.5rem 0;color:var(--muted);font-size:.88rem}
footer.site ul{list-style:none;padding:0;margin:.4rem 0;display:flex;flex-wrap:wrap;gap:.3rem 1rem}
.log article{border-left:3px solid var(--accent);padding:.2rem 0 .2rem 1rem;margin:1.2rem 0}
.log time{font-weight:700}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
.calc>*{min-width:0}
/* ---- embed ---- */
.embed{background:var(--bg);font-size:15px}
.embed .wrap{padding:.75rem}
.embed h1{font-size:1.15rem;margin:0 0 .5rem}
.embed .calc{grid-template-columns:1fr;gap:.75rem;margin-top:.5rem}
.embed .calc form .field{margin:.35rem 0}
.embed .calc form fieldset{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:0 .6rem}
.embed .calc form legend{grid-column:1/-1}
.embed .calc .hint{display:none}
.embed .card{padding:.7rem .8rem}
.embed .meta{font-size:.8rem;color:var(--muted);display:flex;flex-wrap:wrap;justify-content:space-between;gap:.3rem .8rem;margin-top:.6rem}
.embed .meta a{font-weight:700}
.embed details.assume{font-size:.8rem;color:var(--muted);margin-top:.5rem}
[data-theme=dark]{--bg:#12161d;--fg:#e8ebf0;--muted:#a3abb8;--line:#2c3440;--card:#1a2029;--accent:#4fd1a1;--accent-2:#173a2e}
[data-theme=dark] input[type=number],[data-theme=dark] select{background:#0f1319;color:var(--fg);border-color:#3a4452}
[data-theme=dark] .badge{color:#0b1a14}
pre.code{background:#1d2330;color:#e8ebf0;padding:.8rem;border-radius:8px;overflow-x:auto;font-size:.85rem;white-space:pre-wrap;word-break:break-all}
.copy{font:inherit;padding:.4rem .8rem;border-radius:8px;border:1px solid var(--accent);background:#fff;color:var(--accent);cursor:pointer;font-weight:600}
.preview iframe{width:100%;border:1px solid var(--line);border-radius:10px;display:block}