/* AllCalculators — global styles */
:root{
  --ink:#0e1b2c;
  --ink-soft:#43536a;
  --paper:#ffffff;
  --mist:#f2f5f9;
  --line:#dce3ec;
  --accent:#0b7a4b;
  --accent-dark:#08603b;
  --accent-soft:#e6f4ec;
  --radius:12px;
  --maxw:780px;
  --font-display:"Space Grotesk",system-ui,sans-serif;
  --font-body:"Inter",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{font-family:var(--font-body);color:var(--ink);background:var(--paper);line-height:1.65;font-size:16px}
img{max-width:100%}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}

/* Header */
.site-header{border-bottom:1px solid var(--line);background:var(--paper);position:sticky;top:0;z-index:50}
.header-inner{max-width:1080px;margin:0 auto;padding:.7rem 1rem;display:flex;align-items:center;gap:1rem;flex-wrap:wrap}
.logo{font-family:var(--font-display);font-weight:700;font-size:1.25rem;color:var(--ink);letter-spacing:-.02em}
.logo:hover{text-decoration:none}
.logo .dot{color:var(--accent)}
.main-nav{display:flex;gap:.25rem;margin-left:auto;flex-wrap:wrap}
.main-nav a{color:var(--ink-soft);font-weight:600;font-size:.92rem;padding:.4rem .7rem;border-radius:8px}
.main-nav a:hover{background:var(--mist);color:var(--ink);text-decoration:none}
.main-nav a[aria-current="true"]{background:var(--accent-soft);color:var(--accent-dark)}

/* Layout */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 1rem}
.wrap-wide{max-width:1080px;margin:0 auto;padding:0 1rem}
main{padding:1.5rem 0 3rem}

/* Breadcrumbs */
.crumbs{font-size:.85rem;color:var(--ink-soft);margin-bottom:1rem}
.crumbs a{color:var(--ink-soft)}
.crumbs span{color:var(--line);padding:0 .35rem}

/* Typography */
h1{font-family:var(--font-display);font-size:clamp(1.6rem,4vw,2.2rem);line-height:1.2;letter-spacing:-.02em;margin-bottom:.6rem}
h2{font-family:var(--font-display);font-size:1.35rem;letter-spacing:-.01em;margin:2.2rem 0 .7rem}
h3{font-family:var(--font-display);font-size:1.05rem;margin:1.4rem 0 .5rem}
p{margin-bottom:.9rem}
.intro{font-size:1.05rem;color:var(--ink-soft);margin-bottom:1.4rem}
ol,ul{padding-left:1.3rem;margin-bottom:1rem}
li{margin-bottom:.35rem}

/* Calculator card */
.calc-card{background:var(--mist);border:1px solid var(--line);border-radius:var(--radius);padding:1.3rem;margin:1.2rem 0 1.6rem}
.calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:.9rem 1rem}
@media(max-width:560px){.calc-grid{grid-template-columns:1fr}}
.field{display:flex;flex-direction:column;gap:.3rem}
.field.full{grid-column:1/-1}
.field label{font-weight:600;font-size:.88rem}
.field .hint{font-size:.78rem;color:var(--ink-soft)}
.field input,.field select,.field textarea{font:inherit;padding:.65rem .75rem;border:1px solid var(--line);border-radius:8px;background:var(--paper);color:var(--ink);width:100%}
.field textarea{resize:vertical;min-height:90px}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--accent);outline:2px solid var(--accent-soft)}
.btn-calc{grid-column:1/-1;font-family:var(--font-display);font-weight:700;font-size:1rem;background:var(--accent);color:#fff;border:0;border-radius:8px;padding:.8rem 1rem;cursor:pointer;margin-top:.3rem}
.btn-calc:hover{background:var(--accent-dark)}

/* Result — the receipt */
.result{display:none;margin-top:1.1rem;background:var(--paper);border:1px solid var(--line);border-top:2px dashed var(--accent);border-radius:0 0 var(--radius) var(--radius);padding:1rem 1.1rem}
.result.show{display:block}
.result-label{font-size:.72rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-soft);margin-bottom:.4rem}
.result-main{font-family:var(--font-mono);font-weight:500;font-size:clamp(1.4rem,4vw,1.9rem);color:var(--accent-dark);font-variant-numeric:tabular-nums;word-break:break-word}
.result-rows{margin-top:.7rem;border-top:1px solid var(--line);padding-top:.6rem;font-size:.95rem}
.result-rows .row{display:flex;justify-content:space-between;gap:1rem;padding:.22rem 0;border-bottom:1px dotted var(--line)}
.result-rows .row:last-child{border-bottom:0}
.result-rows .row b{font-family:var(--font-mono);font-weight:500;font-variant-numeric:tabular-nums;text-align:right}
.result-note{font-size:.82rem;color:var(--ink-soft);margin-top:.6rem}
.result-error{color:#b42318;font-weight:600}

/* Content sections */
.formula-box{background:var(--mist);border-left:4px solid var(--accent);border-radius:0 8px 8px 0;padding:.9rem 1rem;font-family:var(--font-mono);font-size:.95rem;margin:.8rem 0;overflow-x:auto}
.example-box{border:1px solid var(--line);border-radius:var(--radius);padding:1rem 1.1rem;margin:.8rem 0}
.example-box .tag{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-dark);background:var(--accent-soft);border-radius:99px;padding:.15rem .6rem;margin-bottom:.5rem}

/* FAQ */
.faq details{border:1px solid var(--line);border-radius:10px;padding:.8rem 1rem;margin-bottom:.6rem;background:var(--paper)}
.faq summary{font-weight:600;cursor:pointer;font-size:.97rem}
.faq details[open]{background:var(--mist)}
.faq details p{margin:.6rem 0 0;font-size:.95rem;color:var(--ink-soft)}

/* Related tools */
.related-grid{display:grid;grid-template-columns:1fr 1fr;gap:.7rem;margin-top:.8rem}
@media(max-width:560px){.related-grid{grid-template-columns:1fr}}
.related-grid a{border:1px solid var(--line);border-radius:10px;padding:.7rem .9rem;color:var(--ink);font-weight:600;font-size:.93rem;display:block}
.related-grid a:hover{border-color:var(--accent);background:var(--accent-soft);text-decoration:none}

/* Home & category listing */
.hero{padding:2.2rem 0 1.4rem;text-align:left}
.hero h1{font-size:clamp(1.9rem,5vw,2.8rem)}
.hero p{font-size:1.08rem;color:var(--ink-soft);max-width:640px}
.search-box{margin:1.2rem 0 1.8rem;max-width:520px}
.search-box input{width:100%;font:inherit;padding:.8rem 1rem;border:2px solid var(--line);border-radius:99px;background:var(--paper)}
.search-box input:focus{border-color:var(--accent)}
.cat-section{margin-bottom:2.2rem}
.cat-head{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;border-bottom:2px solid var(--ink);padding-bottom:.4rem;margin-bottom:.9rem}
.cat-head h2{margin:0;font-size:1.25rem}
.cat-head a{font-size:.88rem;font-weight:600}
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:.8rem}
.tool-card{border:1px solid var(--line);border-radius:var(--radius);padding:.9rem 1rem;display:block;color:var(--ink)}
.tool-card:hover{border-color:var(--accent);background:var(--accent-soft);text-decoration:none}
.tool-card b{display:block;font-family:var(--font-display);font-size:.98rem;margin-bottom:.2rem}
.tool-card span{font-size:.83rem;color:var(--ink-soft);line-height:1.45;display:block}
.hidden{display:none!important}

/* Footer */
.site-footer{border-top:1px solid var(--line);background:var(--mist);margin-top:2rem}
.footer-inner{max-width:1080px;margin:0 auto;padding:1.6rem 1rem;font-size:.88rem;color:var(--ink-soft)}
.footer-inner nav{display:flex;gap:1.1rem;flex-wrap:wrap;margin-bottom:.7rem}
.footer-inner a{color:var(--ink-soft);font-weight:600}
.result-code{font-family:"IBM Plex Mono",monospace;font-size:.85rem;background:var(--wash);border:1px solid var(--line);border-radius:8px;padding:.75rem;white-space:pre-wrap;word-break:break-all;max-height:320px;overflow:auto;margin:.5rem 0 0}
.color-swatch{display:inline-block;width:1.1em;height:1.1em;border-radius:4px;border:1px solid var(--line);vertical-align:-.2em;margin-right:.4em}