:root{
  --bg:#EEF3F0;
  --surface:#FFFFFF;
  --surface-2:#F6F8F6;
  --ink:#16292A;
  --ink-soft:#3E5250;
  --muted:#6C7E7B;
  --teal:#1F5D56;
  --teal-deep:#123B36;
  --teal-tint:#E4EEEA;
  --amber:#C98A2B;
  --amber-tint:#F7EBD6;
  --coral:#B8483F;
  --coral-tint:#F5E1DE;
  --sage:#4C8067;
  --sage-tint:#DFEBE2;
  --slate:#4C6C88;
  --slate-tint:#DEE7EE;
  --line:#D9E0DB;
  --line-soft:#E7ECE8;
  --radius:14px;
  --shadow:0 1px 2px rgba(18,59,54,0.06), 0 6px 20px rgba(18,59,54,0.05);
  --font-display:"Newsreader", Georgia, serif;
  --font-body:"Public Sans", -apple-system, sans-serif;
  --font-mono:"IBM Plex Mono", monospace;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--teal);}
img,svg{display:block;max-width:100%;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px;}

.skip-link{position:absolute;left:-999px;top:0;background:var(--teal-deep);color:#fff;padding:.75rem 1rem;z-index:200;border-radius:0 0 8px 0;}
.skip-link:focus{left:0;}

header.site{
  position:sticky;top:0;z-index:50;
  background:var(--teal-deep);
  color:#F3EFE6;
  border-bottom:1px solid rgba(255,255,255,0.08);
}
.site-inner{max-width:1240px;margin:0 auto;padding:.9rem 1.5rem;display:flex;align-items:center;justify-content:space-between;gap:1rem;}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;color:#F3EFE6;}
.brand-mark{width:34px;height:34px;flex:none;}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-text strong{font-family:var(--font-display);font-size:1.28rem;font-weight:600;letter-spacing:.01em;}
.brand-text span{font-size:.68rem;letter-spacing:.09em;text-transform:uppercase;color:#B9C9C4;}
.header-note{font-size:.8rem;color:#C7D6D1;display:none;}
@media(min-width:760px){.header-note{display:block;}}

.layout{max-width:1240px;margin:0 auto;padding:0 1.5rem;display:grid;grid-template-columns:240px 1fr;gap:2.25rem;align-items:start;}
@media(max-width:900px){.layout{grid-template-columns:1fr;}}

nav.jump{position:sticky;top:76px;padding:1.75rem 0 2rem;display:none;}
@media(min-width:900px){nav.jump{display:block;}}
nav.jump .jump-label{font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:0 0 .75rem .1rem;}
nav.jump ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.15rem;}
nav.jump a{display:flex;align-items:center;gap:.65rem;padding:.55rem .7rem;border-radius:10px;text-decoration:none;color:var(--ink-soft);font-size:.92rem;font-weight:500;border:1px solid transparent;}
nav.jump a:hover{background:var(--surface);}
nav.jump a.active{background:var(--surface);color:var(--teal-deep);border-color:var(--line);box-shadow:var(--shadow);}
nav.jump .ic{width:18px;height:18px;flex:none;color:var(--teal);}

.tabbar{position:sticky;top:63px;z-index:40;background:var(--bg);border-bottom:1px solid var(--line);overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch;}
@media(min-width:900px){.tabbar{display:none;}}
.tabbar-inner{display:inline-flex;gap:.4rem;padding:.6rem 1.5rem;}
.tabbar a{display:inline-flex;align-items:center;gap:.4rem;padding:.5rem .8rem;border-radius:999px;background:var(--surface);border:1px solid var(--line);color:var(--ink-soft);text-decoration:none;font-size:.85rem;font-weight:500;}
.tabbar a.active{background:var(--teal);border-color:var(--teal);color:#fff;}
.tabbar .ic{width:15px;height:15px;}

main{min-width:0;padding:1.75rem 0 4rem;}

.hero{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:2.1rem 2rem;margin-bottom:2.25rem;box-shadow:var(--shadow);}
.hero h1{font-family:var(--font-display);font-weight:600;font-size:clamp(1.6rem,3vw,2.15rem);margin:0 0 .6rem;letter-spacing:-.01em;}
.hero p{margin:0 0 1.1rem;color:var(--ink-soft);max-width:60ch;}
.hero-badges{display:flex;flex-wrap:wrap;gap:.5rem;}
.badge{display:inline-flex;align-items:center;gap:.4rem;font-size:.78rem;font-weight:500;color:var(--teal-deep);background:var(--teal-tint);border-radius:999px;padding:.32rem .7rem;}

.calc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:.7rem;margin-top:1.4rem;}
.calc-card{display:flex;flex-direction:column;gap:.5rem;padding:.9rem .95rem;border-radius:12px;border:1px solid var(--line);background:var(--surface-2);text-decoration:none;color:var(--ink);}
.calc-card:hover{border-color:var(--teal);background:var(--teal-tint);}
.calc-card .ic{width:20px;height:20px;color:var(--teal);}
.calc-card strong{font-size:.88rem;font-weight:600;}
.calc-card small{font-size:.74rem;color:var(--muted);line-height:1.3;}


section.calc{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:1.9rem 1.9rem 2.1rem;margin-bottom:1.6rem;box-shadow:var(--shadow);scroll-margin-top:130px;}
section.calc[hidden]{display:none;}
.calc-head{display:flex;align-items:flex-start;gap:.85rem;margin-bottom:.35rem;}
.calc-head .ic{width:30px;height:30px;color:var(--teal);flex:none;margin-top:.1rem;}
.calc-head h2{font-family:var(--font-display);font-weight:600;font-size:1.5rem;margin:0 0 .2rem;}
.calc-head p{margin:0;color:var(--muted);font-size:.92rem;max-width:62ch;}

.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem;margin:1.4rem 0 1.1rem;}
.field{display:flex;flex-direction:column;gap:.35rem;}
.field label{font-size:.78rem;font-weight:600;color:var(--ink-soft);}
.field input,.field select{
  font-family:var(--font-body);font-size:.95rem;padding:.62rem .7rem;border-radius:9px;border:1px solid var(--line);background:var(--surface-2);color:var(--ink);
}
.field input:focus,.field select:focus{border-color:var(--teal);background:var(--surface);}
.field-note{font-size:.72rem;color:var(--muted);}

.unit-toggle{display:inline-flex;border:1px solid var(--line);border-radius:999px;padding:3px;background:var(--surface-2);margin-bottom:1rem;}
.unit-toggle button{border:0;background:transparent;padding:.4rem 1rem;border-radius:999px;font-size:.82rem;font-weight:600;color:var(--muted);cursor:pointer;font-family:var(--font-body);}
.unit-toggle button.active{background:var(--teal);color:#fff;}

.seg-toggle{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:.2rem;}
.seg-toggle button{border:1px solid var(--line);background:var(--surface-2);padding:.55rem .95rem;border-radius:9px;font-size:.85rem;font-weight:600;color:var(--ink-soft);cursor:pointer;font-family:var(--font-body);}
.seg-toggle button.active{background:var(--teal);border-color:var(--teal);color:#fff;}

.btn-calc{margin-top:.4rem;background:var(--teal);color:#fff;border:0;padding:.78rem 1.6rem;border-radius:10px;font-size:.95rem;font-weight:600;cursor:pointer;font-family:var(--font-body);}
.btn-calc:hover{background:var(--teal-deep);}

.result{display:none;margin-top:1.6rem;padding-top:1.5rem;border-top:1px solid var(--line-soft);}
.result.show{display:block;}
.result-flex{display:flex;flex-wrap:wrap;gap:2rem;align-items:center;}
.gauge-wrap{flex:none;width:220px;}
.gauge-value{text-align:center;margin-top:-2.4rem;}
.gauge-value .num{font-family:var(--font-mono);font-size:1.9rem;font-weight:600;color:var(--teal-deep);display:block;}
.gauge-value .cat{font-size:.85rem;font-weight:600;padding:.2rem .65rem;border-radius:999px;display:inline-block;margin-top:.25rem;}
.readout{flex:1;min-width:220px;}
.readout p{margin:0 0 .7rem;color:var(--ink-soft);}
.readout p:last-child{margin-bottom:0;}

.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:.9rem;}
.stat-card{background:var(--surface-2);border:1px solid var(--line-soft);border-radius:12px;padding:.9rem 1rem;}
.stat-card .label{font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:600;}
.stat-card .value{font-family:var(--font-mono);font-size:1.35rem;font-weight:600;color:var(--teal-deep);margin-top:.25rem;}
.stat-card.hi .value{color:var(--teal);}

.macro-bars{display:flex;flex-direction:column;gap:.6rem;margin-top:1rem;}
.macro-row{display:flex;align-items:center;gap:.7rem;font-size:.85rem;}
.macro-row .mlabel{width:64px;flex:none;font-weight:600;color:var(--ink-soft);}
.macro-row .mtrack{flex:1;height:9px;border-radius:99px;background:var(--line-soft);overflow:hidden;}
.macro-row .mfill{height:100%;border-radius:99px;}
.macro-row .mval{width:82px;flex:none;text-align:right;font-family:var(--font-mono);font-size:.8rem;color:var(--ink-soft);}

.callout{margin-top:1rem;background:var(--surface-2);border-left:3px solid var(--teal);border-radius:0 10px 10px 0;padding:.85rem 1rem;font-size:.85rem;color:var(--ink-soft);}
.callout strong{color:var(--ink);}

details.info{margin-top:1.4rem;border-top:1px solid var(--line-soft);padding-top:1rem;}
details.info summary{cursor:pointer;font-weight:600;font-size:.9rem;color:var(--teal-deep);list-style:none;display:flex;align-items:center;gap:.45rem;}
details.info summary::-webkit-details-marker{display:none;}
details.info summary .chev{width:16px;height:16px;transition:transform .15s ease;}
details.info[open] summary .chev{transform:rotate(90deg);}
details.info .info-body{padding:.85rem 0 .2rem;color:var(--ink-soft);font-size:.88rem;}
details.info .info-body p{margin:0 0 .7rem;}
details.info .info-body ul{margin:0 0 .7rem;padding-left:1.1rem;}
details.info .info-body li{margin-bottom:.3rem;}

.disclaimer{font-size:.76rem;color:var(--muted);margin-top:1.1rem;padding-top:.9rem;border-top:1px dashed var(--line);}

.facts-panel{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:1.7rem 1.9rem;margin:2rem 0;box-shadow:var(--shadow);}
.facts-panel h2{font-family:var(--font-display);font-size:1.25rem;margin:0 0 1rem;}
.facts-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:.9rem;}
.fact{display:flex;gap:.65rem;font-size:.85rem;color:var(--ink-soft);}
.fact .ic{width:18px;height:18px;color:var(--amber);flex:none;margin-top:.1rem;}

.methods{font-size:.82rem;color:var(--muted);line-height:1.6;}

footer.site{background:var(--teal-deep);color:#C7D6D1;padding:2.4rem 1.5rem 2rem;margin-top:2rem;}
.footer-inner{max-width:1240px;margin:0 auto;display:flex;flex-wrap:wrap;justify-content:space-between;gap:1.5rem;}
footer.site h3{color:#F3EFE6;font-family:var(--font-display);font-weight:600;font-size:1.1rem;margin:0 0 .5rem;}
footer.site p{font-size:.82rem;max-width:46ch;margin:0;}
.footer-links{display:flex;gap:1.2rem;flex-wrap:wrap;font-size:.82rem;}
.footer-links a{color:#C7D6D1;text-decoration:none;}
.footer-links a:hover{text-decoration:underline;}
.footer-bottom{max-width:1240px;margin:1.6rem auto 0;padding-top:1.2rem;border-top:1px solid rgba(255,255,255,0.1);font-size:.74rem;color:#8FA6A0;}

@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto;}*{transition:none!important;}}

.prose-wrap{max-width:760px;margin:0 auto;padding:2.5rem 1.5rem 4rem;}
.prose-wrap .eyebrow{font-size:.75rem;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);font-weight:600;margin:0 0 .5rem;}
.prose-wrap h1{font-family:var(--font-display);font-weight:600;font-size:clamp(1.7rem,3.4vw,2.3rem);margin:0 0 .4rem;letter-spacing:-.01em;}
.prose-wrap .updated{font-size:.8rem;color:var(--muted);margin:0 0 2rem;}
.prose-wrap h2{font-family:var(--font-display);font-weight:600;font-size:1.25rem;margin:2rem 0 .7rem;}
.prose-wrap p{color:var(--ink-soft);margin:0 0 1rem;}
.prose-wrap ul,.prose-wrap ol{color:var(--ink-soft);margin:0 0 1rem;padding-left:1.2rem;}
.prose-wrap li{margin-bottom:.4rem;}
.prose-wrap a{color:var(--teal);font-weight:600;}
.prose-wrap strong{color:var(--ink);}
.back-link{display:inline-flex;align-items:center;gap:.4rem;font-size:.85rem;font-weight:600;color:var(--teal-deep);text-decoration:none;margin-bottom:1.5rem;}
.back-link svg{width:16px;height:16px;}
.contact-card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:1.6rem 1.7rem;box-shadow:var(--shadow);margin-top:1.5rem;}
.contact-card .row{display:flex;align-items:center;gap:.7rem;padding:.6rem 0;border-bottom:1px solid var(--line-soft);}
.contact-card .row:last-child{border-bottom:0;}
.contact-card .row svg{width:18px;height:18px;color:var(--teal);flex:none;}
.contact-card .row .rl{font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:600;display:block;}
.contact-card .row .rv{font-size:.92rem;font-weight:600;}