:root{
  --paper:#f6f3ea;--card:#fffdf8;--ink:#1d2621;--muted:#5b655e;--line:#e2dccd;
  --accent:#c94a22;--accent-soft:#fbe7dd;--green:#2d6a57;--green-soft:#e2eee8;
  --grid:rgba(45,106,87,.075);--shadow:0 1px 2px rgba(29,38,33,.05),0 10px 28px rgba(29,38,33,.06);
  --res-bg:#1d2621;--res-ink:#f6f3ea;--res-line:rgba(246,243,234,.16);--res-accent:#ff8a5c;
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,"Book Antiqua",Georgia,serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root{
  --paper:#121614;--card:#1a1f1c;--ink:#ebe7dc;--muted:#a2aaa4;--line:#2b332e;
  --accent:#ff8a5c;--accent-soft:#3a2219;--green:#7cc4a8;--green-soft:#1e2b26;
  --grid:rgba(124,196,168,.06);--shadow:none;
  --res-bg:#22302a;--res-ink:#f1eee5;--res-line:rgba(241,238,229,.14);--res-accent:#ff9b72;
}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:80px}
body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.68 var(--sans);text-rendering:optimizeLegibility}
img,svg{max-width:100%;display:block}
a{color:var(--green);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:var(--accent)}
h1,h2,h3{font-family:var(--serif);line-height:1.18;letter-spacing:-.012em;margin:0 0 .5em;font-weight:700}
h1{font-size:clamp(2.1rem,4.8vw,3.3rem)}
h2{font-size:clamp(1.45rem,2.6vw,1.85rem);margin-top:1.9em}
h3{font-size:1.16rem;margin-top:1.4em}
p{margin:0 0 1em}
ul,ol{padding-left:1.25em;margin:0 0 1.2em}
li{margin-bottom:.4em}
.wrap{max-width:1140px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}
.skip:focus{left:12px;top:12px;background:var(--card);padding:8px 12px;z-index:20}

/* header */
.site-header{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--paper) 92%,transparent);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-weight:700;font-size:1.32rem;color:var(--ink);text-decoration:none;letter-spacing:-.01em}
.logo:hover{color:var(--ink)}
.logo svg{width:32px;height:32px}
.logo span b{color:var(--accent)}
.nav ul{list-style:none;display:flex;gap:24px;margin:0;padding:0}
.nav li{margin:0}
.nav a{color:var(--ink);text-decoration:none;font-weight:550;font-size:.95rem}
.nav a:hover,.nav a[aria-current]{color:var(--accent)}

/* hero */
.hero{padding:76px 0 60px;border-bottom:1px solid var(--line);
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:28px 28px;background-position:-1px -1px}
.hero h1{max-width:15ch}
.eyebrow{display:inline-block;font-family:var(--mono);font-size:.76rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:16px}
.lead{font-size:1.18rem;color:var(--muted);max-width:52ch}
.search{margin-top:30px;max-width:500px;position:relative}
.search input{width:100%;padding:15px 16px 15px 46px;border:1.5px solid var(--line);border-radius:14px;background:var(--card);color:var(--ink);font:inherit;box-shadow:var(--shadow)}
.search input:focus{outline:none;border-color:var(--accent)}
.search svg{position:absolute;left:15px;top:50%;transform:translateY(-50%);width:20px;height:20px;color:var(--muted)}
.hero-stats{display:flex;gap:28px;flex-wrap:wrap;margin-top:26px;font-size:.9rem;color:var(--muted)}
.hero-stats b{color:var(--ink);font-family:var(--serif);font-size:1.15rem;margin-right:4px}

/* sections */
.block{padding:60px 0}
.block.alt{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:24px;flex-wrap:wrap}
.section-head h2{margin:0}
.section-head p{margin:0;color:var(--muted)}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:var(--shadow)}
.tool-card{display:block;text-decoration:none;color:var(--ink);transition:transform .16s ease,border-color .16s ease}
.tool-card:hover{transform:translateY(-3px);border-color:var(--accent);color:var(--ink)}
.ic{width:46px;height:46px;border-radius:13px;background:var(--green-soft);color:var(--green);display:grid;place-items:center;margin-bottom:14px}
.ic svg{width:24px;height:24px}
.tool-card:hover .ic{background:var(--accent-soft);color:var(--accent)}
.tool-card h3{margin:0 0 6px;font-size:1.12rem}
.tool-card p{margin:0;color:var(--muted);font-size:.93rem;line-height:1.5}
.no-match{color:var(--muted);display:none;margin-top:12px}

.steps{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:28px;counter-reset:s}
.steps li{counter-increment:s;margin:0}
.steps li::before{content:counter(s,decimal-leading-zero);display:block;font-family:var(--mono);color:var(--accent);font-size:.85rem;margin-bottom:8px;border-top:2px solid var(--ink);padding-top:12px;width:100%}
.steps h3{margin:0 0 6px}
.steps p{color:var(--muted);margin:0}

.post-card{display:flex;flex-direction:column;text-decoration:none;color:var(--ink)}
.post-card:hover{color:var(--ink);border-color:var(--accent)}
.post-card .tag{font-family:var(--mono);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.post-card h3{margin:8px 0}
.post-card p{color:var(--muted);font-size:.94rem;margin:0}

/* tool page */
.crumbs{font-size:.85rem;color:var(--muted);padding-top:22px}
.crumbs ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li{margin:0}
.crumbs li+li::before{content:"/";margin-right:6px;opacity:.6}
.crumbs a{color:var(--muted)}
.page-head{padding:16px 0 30px}
.page-head h1{margin-bottom:.3em}
.calc{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:22px;align-items:start;margin-bottom:24px}
.calc-form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 18px}
.calc-form .form-title{grid-column:1/-1;font-family:var(--mono);font-size:.75rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin:0;display:flex;justify-content:space-between}
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field.full{grid-column:1/-1}
.field[hidden]{display:none}
.field label{font-weight:600;font-size:.9rem;line-height:1.3}
.in{display:flex;align-items:stretch;border:1.5px solid var(--line);border-radius:11px;background:var(--paper);overflow:hidden;transition:border-color .12s}
.in:focus-within{border-color:var(--accent)}
.in input,.in select{flex:1;min-width:0;width:100%;border:0;background:transparent;color:var(--ink);font:inherit;font-size:1rem;padding:11px 12px;appearance:none;-webkit-appearance:none;border-radius:0}
.in select{background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);background-position:calc(100% - 18px) 52%,calc(100% - 13px) 52%;background-size:5px 5px;background-repeat:no-repeat;padding-right:34px;cursor:pointer}
.in select option{background:var(--card);color:var(--ink)}
.in input:focus,.in select:focus{outline:none}
.u{display:flex;align-items:center;padding:0 12px;border-left:1px solid var(--line);font-family:var(--mono);font-size:.8rem;color:var(--muted);background:var(--card);white-space:nowrap}
.field small{color:var(--muted);font-size:.8rem;line-height:1.4}

.result{position:sticky;top:86px;background:var(--res-bg);color:var(--res-ink);border:0;padding:26px}
.result .label{font-family:var(--mono);font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;opacity:.72;margin:0 0 6px}
.result .big{font-family:var(--serif);font-size:clamp(2.6rem,6vw,3.6rem);line-height:1;margin:0 0 8px;font-weight:700;letter-spacing:-.02em}
.result .big small{font-family:var(--sans);font-size:1rem;font-weight:500;opacity:.78;margin-left:8px;letter-spacing:0}
.result .buy{color:var(--res-accent);font-weight:650;margin:0 0 4px}
.result table{width:100%;border-collapse:collapse;margin:16px 0 10px;font-size:.93rem}
.result td{padding:9px 0;border-top:1px solid var(--res-line);vertical-align:top}
.result td+td{text-align:right;font-weight:600;padding-left:12px}
.result .note{font-size:.85rem;opacity:.8;margin:10px 0 0;line-height:1.5}
.result .empty{opacity:.8;margin:6px 0 0}
.actions{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}
.btn{font:inherit;font-size:.9rem;font-weight:600;padding:9px 16px;border-radius:999px;border:1.5px solid var(--res-line);background:transparent;color:inherit;cursor:pointer}
.btn:hover{border-color:var(--res-accent);color:var(--res-accent)}
.btn.primary{background:var(--res-accent);border-color:var(--res-accent);color:#1d1410}
.btn.primary:hover{filter:brightness(1.07);color:#1d1410}

.meta-line{font-size:.85rem;color:var(--muted);margin:6px 0 0;display:flex;gap:14px;flex-wrap:wrap}

/* article */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:48px;align-items:start;padding-bottom:40px}
.prose{max-width:720px}
.prose h2:first-child{margin-top:.6em}
.prose table{width:100%;border-collapse:collapse;margin:0 0 1.4em;font-size:.95rem;background:var(--card);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.prose th,.prose td{text-align:left;padding:10px 14px;border-bottom:1px solid var(--line)}
.prose th{font-size:.82rem;font-family:var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted);background:var(--paper)}
.prose tr:last-child td{border-bottom:0}
.example{margin:1.6em 0;padding:22px 24px;border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:14px;background-color:var(--card);
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:22px 22px}
.example h3{margin-top:0}
.example ul{list-style:none;padding:0;font-family:var(--mono);font-size:.9rem}
.example li{padding:6px 0;border-bottom:1px dashed var(--line);margin:0}
.example p:last-child{margin-bottom:0}
.faq details{border-top:1px solid var(--line);padding:4px 0}
.faq details:last-of-type{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;font-weight:650;padding:14px 30px 14px 0;list-style:none;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:4px;top:10px;font-size:1.4rem;color:var(--accent);font-weight:400}
.faq details[open] summary::after{content:"\2212"}
.faq details p{color:var(--muted);margin:0 0 14px}
.side{position:sticky;top:86px}
.side h2{font-size:1.05rem;margin:0 0 12px;font-family:var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:500}
.side ul{list-style:none;padding:0;margin:0 0 26px}
.side li{margin:0}
.side a{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid var(--line);color:var(--ink);text-decoration:none;font-weight:550;font-size:.95rem}
.side a:hover{color:var(--accent)}
.side a .ic{width:32px;height:32px;border-radius:9px;margin:0;flex:none}
.side a .ic svg{width:18px;height:18px}
.disclaimer{font-size:.85rem;color:var(--muted);padding:14px 16px;border:1px dashed var(--line);border-radius:12px}

.article-head{max-width:760px;padding:16px 0 10px}
.byline{color:var(--muted);font-size:.9rem}
.post-body{font-size:1.06rem}
.callout{padding:18px 20px;background:var(--green-soft);border-radius:14px;margin:1.6em 0}
.callout p:last-child{margin:0}

.figure{margin:0 0 1.6em}
.figure img{width:100%;height:auto;border-radius:18px;border:1px solid var(--line)}
.post-card .thumb{width:100%;height:auto;border-radius:12px;margin-bottom:14px;border:1px solid var(--line)}

/* footer */
.site-footer{border-top:1px solid var(--line);padding:48px 0 30px;margin-top:40px;font-size:.92rem}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
.site-footer h2{font-family:var(--mono);font-size:.75rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin:0 0 12px;font-weight:500}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin:0 0 6px}
.site-footer a{color:var(--ink);text-decoration:none}
.site-footer a:hover{color:var(--accent)}
.site-footer p{color:var(--muted)}
.copy{border-top:1px solid var(--line);margin-top:30px;padding-top:18px;color:var(--muted);font-size:.85rem;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

@media (max-width:900px){
  .layout{grid-template-columns:1fr;gap:20px}
  .side{position:static}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:820px){
  .calc{grid-template-columns:1fr}
  .result{position:static}
}
@media (max-width:540px){
  body{font-size:16px}
  .wrap{padding:0 16px}
  .calc-form{grid-template-columns:1fr}
  .form-title span+span{display:none}
  .nav ul{gap:14px}
  .nav a{font-size:.88rem}
  .logo{font-size:1.15rem}
  .logo svg{width:28px;height:28px}
  .hero{padding:48px 0 40px}
  .block{padding:44px 0}
  .card{padding:18px}
  .foot-grid{grid-template-columns:1fr}
}
@media print{
  .site-header,.site-footer,.side,.actions,.search{display:none}
  .result{background:#fff;color:#000;border:1px solid #000}
  body{background:#fff}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}