/* Prescriba — shared serif editorial design system (used by every tool page) */
:root{
  --bg:#FAFAF8;--fg:#1A1A1A;--muted:#F5F3F0;--muted-fg:#6B6B6B;
  --accent:#B8860B;--accent-2:#D4A84B;--border:#E8E4DF;--card:#FFFFFF;
  /* semantic result zones */
  --good:#4C9A6A;--warn:#C79A3E;--bad:#C0674F;--low:#5B8DEF;--info:#6E7BA8;
  --serif:"Playfair Display",Georgia,serif;--sans:"Source Sans 3",system-ui,sans-serif;--mono:"IBM Plex Mono",monospace;
  --read:52rem;--sh-sm:0 1px 2px rgba(26,26,26,.04);--sh-md:0 4px 14px rgba(26,26,26,.06);--sh-lg:0 12px 34px rgba(26,26,26,.09);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--sans);background:var(--bg);color:var(--fg);line-height:1.75;font-size:17px;-webkit-font-smoothing:antialiased;letter-spacing:.01em;position:relative;overflow-x:hidden}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--serif);font-weight:700;line-height:1.15;letter-spacing:-.015em}
.paper{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.035;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
.glow{position:fixed;top:-8%;right:-6%;width:56vw;height:56vw;max-width:700px;max-height:700px;border-radius:50%;z-index:0;pointer-events:none;background:radial-gradient(circle,rgba(184,134,11,.05),transparent 62%)}
.page{position:relative;z-index:1}
.wrap{max-width:var(--read);margin:0 auto;padding:0 24px}
.sc{font-family:var(--mono);font-size:.72rem;font-weight:500;letter-spacing:.18em;text-transform:uppercase;color:var(--accent)}
.rule-label{display:flex;align-items:center;gap:16px;margin:0 0 22px}
.rule-label .ln{height:1px;flex:1;background:var(--border)}
.rule-label.left .ln:last-child{display:none}
header{position:sticky;top:0;z-index:60;background:rgba(250,250,248,.85);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px;max-width:1120px;margin:0 auto;padding:0 24px}
.brand{font-family:var(--serif);font-weight:800;font-size:1.4rem;letter-spacing:-.02em;display:flex;align-items:center;gap:9px}
.brand .mk{color:var(--accent);font-size:1.6rem}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--sans);font-weight:600;font-size:.95rem;letter-spacing:.02em;padding:12px 24px;border-radius:6px;min-height:44px;transition:all .2s ease-out;cursor:pointer;touch-action:manipulation}
.btn-primary{background:var(--accent);color:#fff;box-shadow:var(--sh-sm)}
.btn-primary:hover{background:var(--accent-2);transform:translateY(-2px);box-shadow:0 8px 20px -6px rgba(184,134,11,.5)}
.btn-outline{background:transparent;border:1px solid var(--fg);color:var(--fg)}
.btn-outline:hover{background:var(--muted);border-color:var(--accent);color:var(--accent)}
.crumb{font-family:var(--mono);font-size:.72rem;letter-spacing:.08em;color:var(--muted-fg);padding:26px 0 0;text-transform:uppercase}
.crumb a:hover{color:var(--accent)}
.hero{padding:22px 0 6px}
.hero h1{font-size:clamp(2.2rem,5vw,3.3rem);margin:12px 0 14px}
.hero p.lead{color:var(--muted-fg);font-size:1.12rem;max-width:40rem}
.tool-card{background:var(--card);border:1px solid var(--border);border-radius:12px;box-shadow:var(--sh-lg);padding:32px;margin:30px 0;position:relative}
.tool-card::before{content:"";position:absolute;top:0;left:24px;right:24px;height:2px;background:var(--accent);opacity:.9}
.vis{display:flex;gap:22px;align-items:center;justify-content:center;flex-wrap:wrap;padding:8px 0 22px;border-bottom:1px solid var(--border);margin-bottom:26px}
.vis .art{flex:none}
.vis .readout{flex:1;min-width:220px;text-align:center}
.bignum{font-family:var(--serif);font-size:3.6rem;font-weight:800;line-height:.95;margin-top:6px}
.biglbl{font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted-fg)}
.pill{display:inline-block;font-family:var(--sans);font-weight:600;font-size:.92rem;padding:5px 16px;border-radius:100px;margin-top:12px;background:rgba(0,0,0,.03)}
.rangeline{color:var(--muted-fg);font-size:.95rem;margin-top:12px}.rangeline b{color:var(--fg)}
.seg{display:inline-flex;border:1px solid var(--border);border-radius:6px;overflow:hidden;margin-bottom:20px;flex-wrap:wrap}
.seg button{font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;padding:9px 18px;color:var(--muted-fg);background:transparent;border:none;cursor:pointer;transition:.2s}
.seg button.on{background:var(--accent);color:#fff}
.fields{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{min-width:0}
.field label{display:block;font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted-fg);margin-bottom:8px}
.inpwrap{display:flex;gap:8px}
.inp,select.inp{width:100%;height:48px;background:transparent;border:1px solid var(--border);border-radius:6px;padding:0 14px;color:var(--fg);font-family:var(--sans);font-size:1.05rem;font-weight:600;outline:none;transition:.15s ease-out}
.inp:hover{border-color:#d8d2c8}
.inp:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(184,134,11,.15)}
.sharebtn{margin-top:22px}
.prose{padding:14px 0}
.prose h2{font-size:1.7rem;margin:40px 0 8px}
.prose h3{font-family:var(--serif);font-size:1.2rem;font-weight:600;margin:24px 0 6px}
.prose p{color:#33322e;margin-bottom:14px}
.prose ul{color:#33322e;margin:0 0 16px 22px}.prose li{margin-bottom:7px}
.prose a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}
.formula{background:var(--muted);border-left:2px solid var(--accent);border-radius:0 8px 8px 0;padding:16px 20px;font-family:var(--serif);font-size:1.12rem;font-style:italic;margin:14px 0}
.faq details{border-bottom:1px solid var(--border);padding:4px 0}
.faq summary{font-family:var(--serif);font-weight:600;font-size:1.1rem;padding:16px 0;cursor:pointer;list-style:none;min-height:44px;display:flex;align-items:center;justify-content:space-between}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:1.4rem}
.faq details[open] summary::after{content:"–"}
.faq details[open] summary{color:var(--accent)}
.faq p{padding-bottom:18px;color:var(--muted-fg)}
.src a{color:var(--accent);text-decoration:underline}.src{margin:0 0 8px 22px;color:var(--muted-fg)}
.disc{font-size:.92rem;color:var(--muted-fg);border-left:2px solid var(--accent-2);padding:12px 18px;background:var(--muted);border-radius:0 8px 8px 0;margin:22px 0}
.appcta{text-align:center;background:var(--muted);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:56px 24px;margin:44px 0}
.appcta h2{font-size:1.8rem;margin-bottom:10px}.appcta p{color:var(--muted-fg);max-width:32rem;margin:0 auto 22px}
.rel{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:16px 0}
.relc{background:var(--card);border:1px solid var(--border);border-radius:8px;padding:18px;display:flex;align-items:center;gap:14px;transition:.2s ease-out;position:relative;overflow:hidden}
.relc::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .25s}
.relc:hover{box-shadow:var(--sh-md)}.relc:hover::before{transform:scaleX(1)}
.relc .t{font-family:var(--serif);font-weight:600;font-size:1.02rem}.relc .d{font-size:.85rem;color:var(--muted-fg)}
.relc .ar{margin-left:auto;color:var(--accent)}
footer{border-top:1px solid var(--border);margin-top:40px;padding:34px 0;color:var(--muted-fg);font-size:.9rem}
footer .brand{font-size:1.15rem;margin-bottom:8px}footer a{color:var(--accent)}
@media(max-width:600px){.fields{grid-template-columns:1fr}.rel{grid-template-columns:1fr}.bignum{font-size:3rem}.tool-card{padding:22px}}
/* tools listing grid (tools page + homepage) */
.cat{margin-top:44px}.cat:first-of-type{margin-top:28px}
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:6px}
.tool{display:block;background:var(--card);border:1px solid var(--border);border-radius:8px;padding:24px 22px;position:relative;transition:all .2s ease-out;overflow:hidden}
.tool::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .25s ease-out}
.tool:hover{box-shadow:var(--sh-md)}.tool:hover::before{transform:scaleX(1)}
.tool .tnum{font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;color:var(--muted-fg)}
.tool h4{font-size:1.22rem;font-weight:700;margin:10px 0 7px}
.tool p{font-size:.93rem;color:var(--muted-fg);line-height:1.55}
.tool .go{font-family:var(--mono);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-top:14px;display:inline-block;opacity:0;transition:.2s}
.tool:hover .go{opacity:1}
@media(max-width:900px){.cat-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.cat-grid{grid-template-columns:1fr}}