:root{--ink:#1d2433;--muted:#5b6474;--brand:#b4232c;--bg:#fff;--soft:#f5f6f8;--line:#e3e6eb;--ok:#14653a}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:#0b5cad}
header.site{border-bottom:1px solid var(--line);background:#fff}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 18px}
.logo{display:inline-block;padding:8px 0;font-weight:800;text-decoration:none;color:var(--ink)}
.logo span{color:var(--brand)}
nav a{display:inline-block;margin-left:6px;padding:12px 6px;font-size:15px;line-height:20px;text-decoration:none;color:var(--muted)}
nav a:hover,nav a:focus{color:var(--brand)}
.wrap{max-width:760px;margin:0 auto;padding:0 18px}
main{padding:22px 0 40px}
h1{font-size:1.9rem;line-height:1.25;margin:.3em 0 .4em}
h2{font-size:1.35rem;margin:1.8em 0 .5em}
h3{font-size:1.1rem;margin:1.4em 0 .4em}
.meta{color:var(--muted);font-size:14px}
.lede{font-size:1.1rem;color:#333}
.box{background:var(--soft);border:1px solid var(--line);border-radius:10px;padding:14px 18px;margin:18px 0}
.key{border-left:4px solid var(--brand)}
.cta{background:#fff7f1;border:1px solid #f1c9a8;border-radius:12px;padding:18px;margin:28px 0}
.cta h2{margin-top:0;font-size:1.2rem}
.btn{display:inline-block;padding:10px 16px;border-radius:8px;text-decoration:none;font-weight:700;margin:6px 8px 6px 0}
.btn.free{background:var(--ok);color:#fff}
.btn.paid{background:var(--brand);color:#fff}
table{border-collapse:collapse;width:100%;margin:12px 0;font-size:15px}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{background:var(--soft)}
.tablewrap{overflow-x:auto}
ul.check{list-style:none;padding-left:0}
ul.check li{padding-left:1.6em;position:relative;margin:.35em 0}
ul.check li:before{content:"☐";position:absolute;left:0}
.sources{font-size:15px}
.cards{display:grid;grid-template-columns:1fr;gap:12px;padding:0;list-style:none}
@media(min-width:640px){.cards{grid-template-columns:1fr 1fr}}
.cards li{border:1px solid var(--line);border-radius:10px;padding:14px}
.cards a{font-weight:700;text-decoration:none}
.cards p{margin:.3em 0 0;color:var(--muted);font-size:15px}
footer.site{border-top:1px solid var(--line);background:var(--soft);font-size:14px;color:var(--muted);padding:20px 0 30px}
.disclaimer{font-size:14px;color:var(--muted)}

.story{background:#fffdf5;border-color:#ecdca8}
.story .label{margin:0 0 .4em;font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.mistakes{border-left:4px solid var(--brand)}
.mistakes li{margin:.5em 0}
.related{font-size:15px}
form.calc input,form.calc select{font:inherit;padding:.5em;max-width:100%;border:1px solid #bbb;border-radius:6px;margin-top:.3em}
form.calc button{border:0;cursor:pointer;font:inherit}
.answer p{margin:.3em 0}
/* mobile + tap-target pass (2026-10-23) */
img,svg,video,iframe{max-width:100%;height:auto}
header.site .wrap{max-width:980px}
.logo{white-space:nowrap}
nav{display:flex;flex-wrap:wrap;justify-content:flex-end}
.cards p{font-size:16px}
.related,.sources{font-size:16px}
.related a,.sources a{line-height:1.9}
footer.site{font-size:15px}
footer.site p{line-height:1.5}
footer.site a{display:inline-block;padding:11px 0}
.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
nav a{min-width:44px;text-align:center}
@media(max-width:820px){nav a{padding:12px 8px;margin-left:2px}}
@media(max-width:640px){
 header.site .wrap{flex-wrap:wrap;row-gap:0;padding:6px 18px 0}
 nav{width:100%;display:flex;flex-wrap:nowrap;justify-content:flex-start;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;margin:0 -8px;border-top:1px solid var(--line)}
 nav::-webkit-scrollbar{display:none}
 nav a{flex:0 0 auto;white-space:nowrap;margin:0;padding:12px 10px;min-width:44px;text-align:center}
 h1{font-size:1.6rem}
 .meta,.disclaimer{font-size:15px}
 th,td{padding:6px 5px}
 .btn{display:block;text-align:center;margin:10px 0;padding:13px 16px}
 form.calc input,form.calc select{width:100%;min-height:48px}
 form.calc button{width:100%}
}