/* /calculators: the calculator hub in the homepage's language. Dark navy
   bands with the contour rings for the hero and the "measured" argument,
   light bands for the cards, same two-tone headings. */
.calc-hub{background:var(--pt-paper)}
.calc-hub h1,.calc-hub h2,.calc-hub h3{letter-spacing:-.02em}

/* Hero */
.ch-hero{position:relative;isolation:isolate;overflow:hidden;color:#ecf6fb;background:#0e1c27;padding-block:88px 96px}
.ch-hero::before,.ch-measured::before{content:'';position:absolute;inset:-10%;z-index:-1;pointer-events:none;background:repeating-radial-gradient(ellipse 58% 46% at 72% 58%,transparent 0 46px,#1d3445 46px 47px)}
.ch-hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:64px;align-items:center}
.ch-hero h1{font:600 clamp(40px,4.2vw,64px)/1.04 var(--pt-font);color:#fff;margin:0}
.ch-hero h1 span,.ch-measured h2 span{color:#8cc0e6}
.ch-lede{margin:24px 0 0;max-width:52ch;font-size:18px;line-height:1.6;color:#a7c0cf}
.ch-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px 28px;margin-top:32px}
.calc-hub .ch-hero .ch-button,.calc-hub .ch-measured .ch-button{background:#f3fbff;color:#0a2537}
.calc-hub .ch-hero .ch-button:hover,.calc-hub .ch-measured .ch-button:hover{background:#fff}
.ch-textlink{display:inline-flex;align-items:center;gap:10px;min-height:44px;font-weight:600;font-size:15px;color:#ecf6fb;text-decoration:none}
.ch-textlink:hover{text-decoration:underline}

/* Quick volume card */
.ch-quick{padding:26px;border-radius:18px;background:#f7fafc;color:#19384f;box-shadow:0 30px 70px -30px rgba(0,0,0,.6)}
.ch-quick h2{margin:0 0 18px;font:600 20px/1.2 var(--pt-font)}
.ch-fields{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.ch-fields label{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:600;color:#506779}
.ch-fields label span{display:flex;align-items:center;gap:8px;font-weight:500}
.ch-fields input,.ch-fields select{width:100%;min-height:44px;padding:0 12px;border:1px solid #c8d7e3;border-radius:10px;background:#fff;color:#19384f;font:500 16px var(--pt-font)}
.ch-fields input:focus,.ch-fields select:focus{outline:2px solid #326b98;outline-offset:1px}
.ch-result{margin:22px 0 0;padding-top:18px;border-top:1px solid #d6e2ec;display:flex;align-items:baseline;gap:10px}
.ch-result b{font:600 44px/1 var(--pt-font);font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.ch-result small{font-size:14px;color:#506779}
.ch-note{margin:10px 0 0;font-size:13.5px;line-height:1.5;color:#506779}
.ch-note a{color:#326b98;font-weight:600}

/* Most used */
.ch-popular{padding-block:88px 72px}
.ch-popular h2,.ch-all h2{font:600 clamp(30px,3.2vw,44px)/1.1 var(--pt-font);color:var(--pt-ink);margin:0 0 36px}
.ch-popular-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.ch-card{display:flex;flex-direction:column;gap:10px;padding:24px;border:1px solid var(--pt-border);border-radius:16px;background:#fff;color:var(--pt-ink);text-decoration:none;transition:border-color .2s,transform .2s}
.ch-card:hover{border-color:var(--pt-accent);transform:translateY(-2px)}
.ch-card h3{margin:0;font:600 20px/1.25 var(--pt-font)}
.ch-card p{margin:0;flex:1;font-size:15px;line-height:1.55;color:var(--pt-muted)}
.ch-go{font-weight:600;font-size:14px;color:var(--pt-accent)}

/* Measured argument */
.ch-measured{position:relative;isolation:isolate;overflow:hidden;background:#0e1c27;color:#ecf6fb;padding-block:96px}
.ch-measured-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:64px;align-items:center}
.ch-measured figure{margin:0}
.ch-measured img{display:block;width:100%;height:auto;border-radius:18px}
.ch-measured h2{margin:0 0 20px;font:600 clamp(30px,3.2vw,46px)/1.08 var(--pt-font);color:#fff}
.ch-measured p{margin:0 0 14px;max-width:56ch;font-size:17px;line-height:1.65;color:#a7c0cf}

/* Every calculator */
.ch-all{padding-block:88px}
.ch-group{margin-top:40px}
.ch-group:first-of-type{margin-top:0}
.ch-group h3{margin:0 0 14px;font:600 13px/1.3 var(--pt-font);letter-spacing:.12em;text-transform:uppercase;color:var(--pt-muted)}
.ch-group ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.ch-group a{display:flex;flex-direction:column;gap:6px;height:100%;box-sizing:border-box;padding:16px 18px;border:1px solid var(--pt-border);border-radius:12px;background:var(--pt-surface);color:var(--pt-ink);text-decoration:none}
.ch-group a:hover{border-color:var(--pt-accent);background:#fff}
.ch-group strong{font-size:16px}
.ch-group span{font-size:14px;line-height:1.5;color:var(--pt-muted)}

@media(max-width:1060px){
 .ch-hero-grid,.ch-measured-grid{grid-template-columns:1fr;gap:44px}
 .ch-popular-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
 .ch-group ul{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:640px){
 .ch-hero{padding-block:52px 60px}
 .ch-popular,.ch-all{padding-block:56px}
 .ch-measured{padding-block:60px}
 .ch-popular-grid,.ch-group ul,.ch-fields{grid-template-columns:1fr}
 .ch-result b{font-size:38px}
}

.calc-hub .skip-link{position:absolute;top:-100px;left:20px;z-index:10;padding:10px;background:var(--pt-paper)}
.calc-hub .skip-link:focus{top:10px}
.calc-hub .ch-textlink{color:#ecf6fb}
.calc-hub .ch-card h3,.calc-hub .ch-group strong{color:var(--pt-ink)}
.calc-hub .ch-go{color:var(--pt-accent)}
.calc-hub .ch-lede{margin-top:24px}

/* Film intro (replaces the four feature cards). */
.ch-intro{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:56px;align-items:center;padding-block:88px 80px}
.ch-intro h2{font:600 clamp(30px,3.2vw,44px)/1.1 var(--pt-font);color:var(--pt-ink);margin:0 0 18px}
.calc-hub .ch-intro p{margin:0 0 28px;font-size:17px;line-height:1.65;color:var(--pt-muted);max-width:48ch}
.ch-film{margin:0}
.ch-film video{display:block;width:100%;aspect-ratio:16/9;border-radius:18px;background:#0e1c27;object-fit:cover}
@media(max-width:1060px){.ch-intro{grid-template-columns:1fr;gap:32px}}
@media(max-width:640px){.ch-intro{padding-block:56px}}