@font-face{font-family:"Public Sans";src:url(fonts/public-sans-400.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Public Sans";src:url(fonts/public-sans-600.woff2) format("woff2");font-weight:600;font-display:swap}
@font-face{font-family:"Public Sans";src:url(fonts/public-sans-700.woff2) format("woff2");font-weight:700;font-display:swap}
:root{--paper:#F3F5F6;--sans:"Public Sans","Segoe UI",Arial,sans-serif;--card:#FFFFFF;--ink:#152337;--mute:#425466;--rule:#D5DDE2;--moss:#008000;--moss-d:#006400;--focus:#2360AA;--s1:#C9E4CD;--s2:#ACD2B2;--s3:#84B88E;--soil:#5B9066;--tint:#F3F5F6;--field-border:#8494A4}*{box-sizing:border-box}html{font-size:112.5%;-webkit-text-size-adjust:100%}body{margin:0;background:var(--paper);color:var(--ink);font:400 19px/1.62 var(--sans)}img,svg{max-width:100%}a{color:var(--moss);text-underline-offset:2px}a:hover{color:var(--moss-d)}:focus-visible{outline:3px solid var(--focus);outline-offset:2px}.wrap{max-width:1080px;margin:0 auto;padding:0 20px}.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:8px 12px;z-index:9}.skip:focus{left:8px}.brand,.duo-h,.n,h1,h2,h3{font-family:var(--sans);font-weight:700;letter-spacing:-.005em;line-height:1.15}h1{font-size:2.45rem;margin:.2rem 0 .6rem}h2{font-size:1.6rem;margin:2.2rem 0 .7rem}h3{font-size:1.2rem;margin:1.5rem 0 .4rem}p{margin:.6rem 0}.site-head{background:var(--tint);color:var(--ink)}.site-head .wrap{gap:22px;min-height:58px;flex-wrap:wrap}.brand,.site-nav a{text-decoration:none}.brand,.site-head .wrap{display:flex;align-items:center}.brand{font-size:1.3rem;gap:10px}.brand,.brand:hover{color:var(--ink)}.brand svg{width:28px;height:28px;flex:none}.site-nav{flex:1;min-width:0}.site-nav ul{list-style:none;margin:0;padding:0;display:flex;gap:4px 16px;flex-wrap:wrap}.site-nav a{color:var(--moss);font-size:.95rem;padding:4px 0;display:inline-block}.site-nav a:hover,.site-nav a[aria-current]{color:var(--moss-d);box-shadow:inset 0-2px 0 var(--focus)}.hero{padding:26px 0 0;position:relative}.hero:after{content:"";display:block;height:22px;margin-top:34px;background:linear-gradient(var(--s1)0 6px,var(--s2) 6px 12px,var(--s3) 12px 17px,var(--soil) 17px 22px)}.crumbs{font-size:.9rem;margin:0}.crumbs,.crumbs a{color:var(--mute)}.intro{font-size:1.12rem;max-width:62ch;color:var(--ink)}.tool{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:26px;margin-top:22px;align-items:start}.calc{background:var(--card);border:1px solid var(--rule);border-top:4px solid var(--s3);border-radius:4px;padding:20px 20px 22px}.fgrid{display:grid;grid-template-columns:1fr 1fr;gap:14px 16px}.fld,.inp{display:flex}.fld{flex-direction:column;gap:5px;min-width:0}.fld.wide{grid-column:1/-1}.fld[hidden]{display:none}.fld label{font-weight:600;font-size:.95rem}.fld .hint{font-size:.85rem;color:var(--mute);line-height:1.35}.inp{align-items:stretch;border:1px solid var(--field-border);border-radius:4px;background:#fff;overflow:hidden}.inp:focus-within{border-color:var(--moss);box-shadow:0 0 0 2px rgb(35 96 170 / 22%)}.fld>select,.inp input,.inp select{flex:1;min-width:0;border:0;padding:10px 11px;font:inherit;font-size:1rem;color:var(--ink);background:0 0}.fld>select{border:1px solid var(--field-border);border-radius:4px;background:#fff}.fld>select:focus,.inp input:focus,.inp select:focus{outline:0}.fld>select:focus{border-color:var(--moss);box-shadow:0 0 0 2px rgb(35 96 170 / 22%)}.inp .u{padding:10px 11px;background:var(--tint);color:var(--mute);border-left:1px solid var(--rule);font-size:.92rem;white-space:nowrap}.inp .u.pre{border-left:0;border-right:1px solid var(--rule)}.sub-h{grid-column:1/-1;font-weight:600;margin:6px 0-4px;padding-top:10px;border-top:1px solid var(--rule)}.actions{margin-top:20px}.btn,.result{border-radius:4px}.btn{background:var(--moss);color:#fff;border:0;padding:13px 26px;font:600 1.05remvar(--sans);cursor:pointer}.btn:hover{background:var(--moss-d)}.result{background:#F8FCF8;border:1px solid var(--rule);padding:20px;min-height:120px}.result .empty{color:var(--mute);margin:0}.big{margin:0 0 12px}.big .n{font-size:2.7rem;line-height:1}.big .u,.spec thead th{font-size:1.15rem;font-weight:600}.big .sub{color:var(--ink);margin:.4rem 0 0}.strata{display:block;width:100%;height:auto;margin:6px 0 14px;border-radius:2px}.strata .st{font:600 13pxvar(--sans);fill:#fff;paint-order:stroke;stroke:#2b2a26;stroke-width:3px}table{border-collapse:collapse;width:100%}.spec th{padding:8px 0;border-bottom:1px solid var(--rule);text-align:left;vertical-align:top}.dtable td,.dtable th,.spec td{border-bottom:1px solid var(--rule);text-align:right;font-variant-numeric:tabular-nums}.spec td{vertical-align:top;padding:8px 0 8px 12px}.spec thead th{font-size:.88rem;color:var(--mute)}.spec thead th+th{text-align:right}.spec th[scope=row]{font-weight:400}.spec .tot td,.spec .tot th{font-weight:600;border-bottom:0}.spec caption{text-align:left;font-weight:600;padding:6px 0}.rnote{font-size:.9rem;color:var(--mute);margin-top:12px}.err{color:#9b2c1f;font-weight:600}.duo{display:grid;grid-template-columns:1fr 1fr;gap:14px}.duo-c{border:1px solid var(--rule);border-radius:4px;padding:12px}.duo-h{font-size:1.1rem;margin:0 0 6px}.duo .big .n{font-size:2.1rem}.block{padding:8px 0 12px}.prose{max-width:74ch}.formula{font-family:var(--sans);font-weight:700;font-size:1.08rem;background:var(--tint);border-left:4px solid var(--s3);padding:10px 14px;margin:12px 0}.dtable{background:var(--card);border:1px solid var(--rule);border-radius:4px;overflow-x:auto;margin:12px 0}.dtable table{min-width:420px}.dtable td,.dtable th{padding:9px 12px}.dtable td:first-child,.dtable th:first-child{text-align:left}.dtable thead th{background:var(--tint);font-weight:600;font-size:.92rem}.dtable tbody tr:last-child td,.dtable tbody tr:last-child th{border-bottom:0}.dtable tbody th{font-weight:400}.cap{font-size:.88rem;color:var(--mute);margin:-4px 0 12px}.faq details{border-bottom:1px solid var(--rule);padding:10px 0}.faq summary{cursor:pointer;font-weight:600;font-size:1.05rem}.faq details p{margin:.5rem 0 .2rem}.links,.src{padding-left:18px}.links{columns:2;column-gap:28px}.links li{margin:4px 0;break-inside:avoid}.src{font-size:.9rem;color:var(--mute);word-break:break-all}.src li{margin:3px 0}.cards,.site-foot ul{list-style:none;padding:0}.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px}.cards a{display:block;background:var(--card);border:1px solid var(--rule);border-radius:4px;padding:12px 14px;text-decoration:none;color:var(--ink);height:100%}.cards a:hover{border-color:var(--moss)}.cards b{display:block;color:var(--moss)}.cards span{font-size:.9rem;color:var(--mute)}.ad-slot{margin:30px auto;text-align:center}.site-foot{background:var(--tint);color:var(--mute);margin-top:44px;padding:30px 0;font-size:.92rem}.site-foot .wrap{display:grid;grid-template-columns:1.3fr 1fr;gap:28px}.site-foot a{color:var(--moss)}.site-foot ul{margin:0;columns:2}.site-foot li{margin:4px 0}@media (max-width:860px){.site-foot .wrap,.tool{grid-template-columns:1fr}}@media (max-width:560px){body{font-size:18px}h1{font-size:1.9rem}h2{font-size:1.4rem}.wrap{padding:0 16px}.fgrid{grid-template-columns:1fr}.calc{padding:16px}.links{columns:1}.duo{grid-template-columns:1fr}.big .n{font-size:2.3rem}.site-head .wrap{padding-top:10px;padding-bottom:0;gap:6px;min-height:0}.site-nav{flex-basis:100%;margin:0-16px;padding:0 16px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}.site-nav::-webkit-scrollbar{display:none}.site-nav ul{flex-wrap:nowrap;gap:0 18px;padding-bottom:6px}.site-nav a{white-space:nowrap;padding:8px 0}.btn{width:100%}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

/* Shared page layout */
:root {
  --page: #FFFFFF;
  --radius: 12px;
  --panel-inset: clamp(1rem, 4vw, 2rem);
}

body {
  background: var(--page);
  font-variant-numeric: tabular-nums;
}

.wrap {
  width: min(1160px, 100% - 2rem);
  max-width: none;
  padding-inline: 0;
}

.site-head {
  border-bottom: 1px solid var(--rule);
}

.site-head .wrap {
  justify-content: space-between;
  min-height: 72px;
  padding-block: .55rem;
}

.site-nav {
  flex: 0 1 auto;
}

.site-nav a {
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a[aria-current] {
  border-color: var(--focus);
  box-shadow: none;
}

.hero {
  padding: clamp(1.7rem, 5vw, 3.25rem) 0 clamp(1.7rem, 5vw, 3rem);
  background: linear-gradient(var(--tint), var(--page) 21rem);
}

.hero::after {
  content: none;
}

.hero .wrap {
  max-width: 860px;
}

.hero h1,
.hero .intro,
.hero .crumbs {
  margin-inline: auto;
  text-align: center;
}

.hero h1 {
  max-width: 25ch;
  font-size: clamp(1.95rem, 1.4rem + 2.5vw, 3.15rem);
  margin-block: 0 .7rem;
  text-wrap: balance;
}

.hero .crumbs {
  margin-bottom: .9rem;
}

.hero .intro {
  margin-block: 0 1.5rem;
  color: var(--mute);
}

.tool {
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin-top: 1.5rem;
  border: 1px solid var(--rule);
  border-radius: 20px;
  background: var(--card);
  box-shadow: 0 8px 26px rgb(21 35 55 / 10%);
}

.calc,
.result {
  min-width: 0;
  border: 0;
  padding: var(--panel-inset);
}

.calc {
  border-radius: 20px 20px 0 0;
}

.fgrid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .85rem 1.25rem;
}

.fld label {
  font-size: .95rem;
  font-weight: 700;
}

.inp,
.fld > select {
  border-radius: var(--radius);
  min-height: 46px;
}

.inp {
  border-width: 2px;
  min-height: 58px;
}

.inp input[type=number] {
  font-size: clamp(1.27rem, 1.15rem + .5vw, 1.5rem);
  font-weight: 700;
  line-height: 1.15;
}

.fld > select,
.inp select {
  font-size: 1rem;
}

.inp input,
.inp select {
  width: 0;
}

.inp .u {
  display: flex;
  align-items: center;
  background: var(--card);
  font-weight: 600;
}

.btn {
  width: 100%;
  min-height: 54px;
  border-radius: 999px;
}

.result {
  min-height: 0;
  border-top: 1px solid var(--rule);
  border-radius: 0 0 20px 20px;
  background: var(--paper);
  color: var(--ink);
  font-size: clamp(1.0625rem, 1rem + .4vw, 1.1875rem);
  overflow-wrap: anywhere;
}

.result .empty,
.result .big .sub,
.result .rnote {
  color: var(--mute);
}

.result .rnote {
  font-size: 1rem;
}

.result .big .n {
  color: var(--moss);
}

.result .strata {
  max-width: 540px;
  margin-inline: auto;
}

.result .duo-c {
  border-radius: var(--radius);
  background: var(--card);
}

.result .spec th,
.result .spec td {
  padding-block: .55rem;
  font-size: inherit;
}

.result .spec thead th {
  padding-inline: .5rem;
}

.result .spec th[scope=row],
.result .spec td {
  font-weight: 600;
}

.block {
  padding: clamp(1.4rem, 4vw, 2.7rem) 0;
}

.block:nth-of-type(even) {
  background: var(--paper);
}

.block .prose {
  max-width: 860px;
}

h2 {
  font-size: clamp(1.48rem, 1.2rem + 1vw, 1.95rem);
}

.block h2:first-child {
  margin-top: 0;
}

.cards {
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 245px), 1fr));
  gap: .85rem;
}

.cards a,
.dtable,
.formula {
  border-radius: var(--radius);
}

.cards a {
  padding: .9rem 1rem;
}

.dtable {
  background: var(--paper);
  border-radius: 0;
}

.dtable td,
.dtable th {
  padding: .56rem .8rem;
}

.dtable tbody th {
  font-weight: 600;
}

.dtable thead th,
.result .spec thead th {
  background: var(--moss);
  color: #fff;
  font-weight: 700;
}

.faq summary {
  position: relative;
  list-style: none;
  padding-right: 1.5rem;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: '+';
  position: absolute;
  right: .15rem;
  color: var(--moss);
}

.faq details[open] summary::after {
  content: '−';
}

.site-foot {
  margin-top: 0;
  border-top: 1px solid var(--rule);
}

@media (max-width: 760px) {
  .site-head .wrap {
    min-height: 0;
    gap: .35rem;
  }

  .site-nav {
    flex: 0 0 100%;
    margin: 0;
    padding: 0;
    overflow-x: auto;
  }

  .site-nav ul {
    flex-wrap: nowrap;
    gap: 0 1rem;
  }

  .site-nav a {
    white-space: nowrap;
  }
}

@media (max-width: 560px) {
  .fgrid {
    grid-template-columns: minmax(0, 1fr);
  }

  .result .spec td {
    padding-left: .25rem;
  }
}