/* WarmRechner design system v2 — palette: primary deep teal, accent amber (sparing), slate neutrals */
:root{
--primary:#0E6B5E;--primary-dark:#0A4F45;--primary-tint:#E6F2EF;--primary-mid:#3E8F83;
--accent:#B45309;--accent-tint:#FBF0E1;--accent-soft:#D97706;
--ink:#0F172A;--body:#334155;--muted:#64748B;--faint:#94A3B8;
--bg:#F7F8F7;--surface:#FFFFFF;--border:#E2E8F0;--border-strong:#CBD5E1;
--success:#15803D;--error:#B91C1C;--footer-bg:#0F172A;--footer-ink:#CBD5E1;
--radius:14px;--radius-s:10px;--shadow:0 1px 3px rgba(15,23,42,.07),0 8px 24px rgba(15,23,42,.05);
--shadow-lg:0 4px 12px rgba(15,23,42,.08),0 20px 44px rgba(15,23,42,.10);
--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--body);font:16px/1.65 var(--font);-webkit-font-smoothing:antialiased}
::selection{background:var(--primary-tint)}
a{color:var(--primary);text-underline-offset:3px}
a:hover{color:var(--primary-dark)}
:focus-visible{outline:3px solid var(--primary-mid);outline-offset:2px;border-radius:4px}
/* header */
header.site{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:40}
.header-in{max-width:1180px;margin:0 auto;padding:0 24px;min-height:64px;display:flex;gap:24px;align-items:center}
.logo{font-weight:800;font-size:20px;color:var(--ink);text-decoration:none;letter-spacing:-.02em;display:flex;align-items:center;gap:10px;min-height:44px}
.logo:hover{color:var(--ink)}
.logo .mark{width:34px;height:34px;flex:none}
.logo small{display:block;font-size:10px;color:var(--muted);font-weight:600;letter-spacing:.08em}
nav.main{display:flex;gap:4px}
nav.main a{color:var(--body);text-decoration:none;font-size:15px;font-weight:500;padding:10px 12px;border-radius:8px;min-height:44px;display:inline-flex;align-items:center}
nav.main a:hover{background:var(--primary-tint);color:var(--primary-dark)}
nav.main a[aria-current]{color:var(--primary-dark);background:var(--primary-tint)}
.lang{margin-left:auto;font-size:14px;font-weight:600;color:var(--muted);display:flex;gap:6px;align-items:center}
.lang a{color:var(--body);text-decoration:none;padding:10px;min-height:44px;display:inline-flex;align-items:center;border-radius:8px}
.lang a:hover{background:var(--primary-tint)}
/* layout & type */
.wrap{max-width:1180px;margin:0 auto;padding:32px 24px 72px}
.wrap-narrow{max-width:860px}
.crumb{font-size:13px;color:var(--muted);margin-bottom:16px}
.crumb a{color:var(--muted)}
h1{font-size:clamp(30px,4.2vw,44px);line-height:1.12;letter-spacing:-.025em;color:var(--ink);margin:0 0 14px;font-weight:800}
h2{font-size:clamp(21px,2.6vw,27px);line-height:1.25;letter-spacing:-.02em;color:var(--ink);margin:44px 0 12px;font-weight:750}
h3{font-size:17px;line-height:1.35;color:var(--ink);margin:0 0 8px;font-weight:700}
p{margin:0 0 14px}
.lead{font-size:19px;line-height:1.6;color:var(--body);max-width:68ch}
.lead strong{color:var(--ink)}
.mut{color:var(--muted);font-size:14px}
.small{font-size:13px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--primary-dark);background:var(--primary-tint);border-radius:999px;padding:6px 12px;margin-bottom:16px}
.eyebrow.amber{color:#92400E;background:var(--accent-tint)}
/* hero */
.hero{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;padding:16px 0 8px}
.hero-art{background:var(--surface);border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow);padding:10px}
.hero-art svg{width:100%;height:auto;display:block}
.hero-stats{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.stat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-s);padding:12px 16px;min-width:132px}
.stat b{display:block;font-size:21px;color:var(--ink);letter-spacing:-.02em;line-height:1.2}
.stat span{font-size:13px;color:var(--muted)}
/* buttons */
.btn{background:var(--primary);color:#fff;border:1px solid var(--primary);border-radius:10px;padding:13px 22px;font-weight:650;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:8px;font-size:16px;min-height:48px;transition:background .15s,transform .1s;font-family:inherit}
.btn:hover{background:var(--primary-dark);color:#fff}
.btn:active{transform:translateY(1px)}
.btn.secondary{background:var(--surface);color:var(--primary-dark);border-color:var(--border-strong)}
.btn.secondary:hover{background:var(--primary-tint)}
.btn.ghost{background:transparent;color:var(--body);border-color:transparent}
.btn.ghost:hover{background:var(--primary-tint);color:var(--primary-dark)}
.btn[disabled]{opacity:.45;cursor:not-allowed}
/* cards & grid */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.card p:last-child{margin-bottom:0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px;margin:18px 0}
.icon{width:40px;height:40px;border-radius:10px;background:var(--primary-tint);display:flex;align-items:center;justify-content:center;margin-bottom:12px}
.icon svg{width:22px;height:22px;stroke:var(--primary-dark)}
.icon.amber{background:var(--accent-tint)}.icon.amber svg{stroke:var(--accent)}
.pill{display:inline-block;font-size:12px;font-weight:700;border-radius:999px;padding:3px 10px;background:var(--primary-tint);color:var(--primary-dark)}
.pill.amber{background:var(--accent-tint);color:#92400E}
/* tables */
.tablewrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);margin:16px 0}
table{border-collapse:collapse;width:100%;font-size:15px}
th,td{padding:12px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--border)}
tr:last-child td{border-bottom:0}
th{background:#F1F5F9;color:var(--ink);font-size:13px;letter-spacing:.03em;text-transform:uppercase}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
/* steps timeline */
.steps{list-style:none;margin:18px 0;padding:0;counter-reset:st}
.steps li{display:flex;gap:16px;padding:16px 0;border-bottom:1px solid var(--border)}
.steps li:last-child{border-bottom:0}
.steps .n{flex:none;width:36px;height:36px;border-radius:50%;background:var(--primary);color:#fff;font-weight:750;display:flex;align-items:center;justify-content:center;font-size:15px}
.steps h3{margin:2px 0 4px}.steps p{margin:0;color:var(--body)}
/* faq / note / alert */
.faq{border:1px solid var(--border);border-radius:var(--radius-s);background:var(--surface);padding:14px 18px;margin:10px 0}
.faq summary{font-weight:650;cursor:pointer;color:var(--ink);min-height:32px}
.faq p{margin:8px 0 2px}
.note{font-size:13px;color:var(--muted);border-top:1px solid var(--border);padding-top:12px;margin-top:28px}
.alert{border-radius:var(--radius-s);padding:14px 16px;font-size:15px;margin:16px 0;display:flex;gap:12px}
.alert svg{width:22px;height:22px;min-width:22px;max-width:22px;flex:none;margin-top:2px}
.alert span{flex:1;min-width:0}
.alert.warn{background:#FFFBEB;border:1px solid #FDE68A;color:#78350F}
.alert.info{background:var(--primary-tint);border:1px solid #BFE3DB;color:#134E4A}
/* calculator wizard */
.calc-layout{display:grid;grid-template-columns:minmax(0,1fr) 400px;gap:24px;align-items:start;margin-top:20px}
.wizard{background:var(--surface);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}
.wiz-progress{display:flex;background:#F1F5F9;border-bottom:1px solid var(--border)}
.wiz-progress button{flex:1;background:none;border:0;border-bottom:3px solid transparent;padding:14px 6px;font:600 13.5px var(--font);color:var(--muted);cursor:pointer;min-height:52px;display:flex;flex-direction:column;align-items:center;gap:2px}
.wiz-progress button .dot{width:24px;height:24px;border-radius:50%;background:#fff;border:2px solid var(--border-strong);display:flex;align-items:center;justify-content:center;font-size:12px}
.wiz-progress button[aria-current="step"]{color:var(--primary-dark);border-bottom-color:var(--primary)}
.wiz-progress button[aria-current="step"] .dot{border-color:var(--primary);background:var(--primary);color:#fff}
.wiz-progress button.done{color:var(--primary-dark)}
.wiz-progress button.done .dot{border-color:var(--primary);background:var(--primary-tint);color:var(--primary-dark)}
.wiz-body{padding:26px}
.wiz-step{display:none}.wiz-step.active{display:block;animation:fadein .25s ease}
@keyframes fadein{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
.wiz-nav{display:flex;justify-content:space-between;gap:12px;padding:18px 26px;border-top:1px solid var(--border);background:#F8FAFC}
fieldset{border:0;margin:0 0 20px;padding:0}
legend{font-weight:700;color:var(--ink);font-size:16px;margin-bottom:10px;padding:0}
label.flabel{display:block;font-weight:650;color:var(--ink);margin:20px 0 8px;font-size:15px}
label.flabel:first-child{margin-top:0}
.hint{font-size:13px;color:var(--muted);margin-top:6px}
input[type=text],input[type=email],input[type=number],select,textarea{width:100%;background:#fff;color:var(--ink);border:1px solid var(--border-strong);border-radius:10px;padding:12px 14px;font-size:16px;font-family:inherit;min-height:48px}
textarea{min-height:auto}
input:focus,select:focus,textarea:focus{border-color:var(--primary);outline:3px solid var(--primary-tint);outline-offset:0}
input[aria-invalid="true"]{border-color:var(--error)}
.err-msg{display:none;color:var(--error);font-size:13.5px;margin-top:6px;font-weight:550}
.err-msg.show{display:block}
/* segmented choices */
.choices{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:10px}
.choice{position:relative}
.choice input{position:absolute;opacity:0;inset:0;cursor:pointer}
.choice span{display:flex;flex-direction:column;gap:3px;border:1.5px solid var(--border);border-radius:12px;padding:14px;min-height:64px;font-weight:600;color:var(--ink);font-size:15px;background:#fff;transition:border-color .12s,background .12s}
.choice span small{font-weight:400;color:var(--muted);font-size:13px}
.choice input:checked+span{border-color:var(--primary);background:var(--primary-tint)}
.choice input:focus-visible+span{outline:3px solid var(--primary-mid);outline-offset:2px}
.choice:hover span{border-color:var(--primary-mid)}
.check{display:flex;gap:12px;align-items:flex-start;font-weight:500;background:#F8FAFC;border:1px solid var(--border);border-radius:12px;padding:14px 16px;cursor:pointer;margin:10px 0}
.check input{width:22px;height:22px;margin:2px 0 0;accent-color:var(--primary);flex:none}
.check small{display:block;color:var(--muted);font-weight:400}
/* range slider */
.range-row{display:flex;align-items:center;gap:16px}
input[type=range]{flex:1;-webkit-appearance:none;appearance:none;height:8px;border-radius:99px;background:linear-gradient(to right,var(--primary) var(--fill,30%),#E2E8F0 var(--fill,30%));cursor:pointer;min-height:44px;background-clip:content-box;padding:18px 0}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:26px;height:26px;border-radius:50%;background:#fff;border:3px solid var(--primary);box-shadow:0 1px 4px rgba(15,23,42,.25);cursor:grab}
input[type=range]::-moz-range-thumb{width:22px;height:22px;border-radius:50%;background:#fff;border:3px solid var(--primary);box-shadow:0 1px 4px rgba(15,23,42,.25);cursor:grab}
.range-val{flex:none;width:118px}
.range-scale{display:flex;justify-content:space-between;font-size:12px;color:var(--faint);margin-top:-8px}
/* result panel */
.result{position:sticky;top:84px;background:var(--surface);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow-lg);overflow:hidden}
.result-head{background:var(--ink);color:#fff;padding:16px 22px}
.result-head h2{color:#fff;margin:0 0 2px;font-size:19px}
.result-head p{margin:0;color:#CBD5E1;font-size:13.5px}
.result-body{padding:16px 22px}
.rrow{display:flex;justify-content:space-between;gap:14px;padding:7px 0;border-bottom:1px solid var(--border);font-size:15px}
.rrow b{color:var(--ink);text-align:right;font-variant-numeric:tabular-nums}
.rrow.total{border-bottom:0;padding-top:14px}
.rrow.total span{font-weight:700;color:var(--ink)}
.netbox{background:var(--primary-tint);border-radius:12px;padding:13px 18px;margin:12px 0}
.netbox .lab{font-size:13px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--primary-dark)}
.netbox .big{font-size:28px;font-weight:800;color:var(--ink);letter-spacing:-.02em;line-height:1.25;font-variant-numeric:tabular-nums}
.chart{margin:16px 0}
.chart.step-curve{margin:20px 0 2px}
.chart.step-curve svg{width:100%;height:auto}
.chart h3{font-size:15px;display:flex;justify-content:space-between;align-items:baseline}
.chart h3 .tot{font-size:13px;color:var(--muted);font-weight:500}
.chart svg{width:100%;height:auto;display:block}
.legend{display:flex;flex-wrap:wrap;gap:8px 16px;font-size:13px;color:var(--body);margin-top:8px}
.legend i{width:12px;height:12px;border-radius:3px;display:inline-block;margin-right:6px;vertical-align:-1px}
.skeleton{background:linear-gradient(90deg,#F1F5F9 25%,#E2E8F0 50%,#F1F5F9 75%);background-size:200% 100%;animation:sk 1s infinite;border-radius:8px;color:transparent!important}
@keyframes sk{to{background-position:-200% 0}}
.empty{border:1.5px dashed var(--border-strong);border-radius:12px;padding:22px;text-align:center;color:var(--muted);font-size:15px}
/* bars on content pages */
.bars{display:grid;gap:10px;margin:16px 0}
.bar-row{display:grid;grid-template-columns:170px 1fr 86px;gap:12px;align-items:center;font-size:14.5px}
.bar-track{height:16px;background:#F1F5F9;border-radius:99px;overflow:hidden}
.bar-fill{height:100%;border-radius:99px;background:var(--primary)}
.bar-fill.amber{background:var(--accent-soft)}
.bar-row b{text-align:right;color:var(--ink);font-variant-numeric:tabular-nums}
/* footer */
footer.site{background:var(--footer-bg);color:var(--footer-ink);margin-top:0}
.footer-in{max-width:1180px;margin:0 auto;padding:36px 24px 44px;font-size:14.5px}
.footer-in a{color:#E2E8F0}
.footer-grid{display:flex;flex-wrap:wrap;gap:8px 28px;margin-bottom:14px}
.footer-grid a{text-decoration:none;padding:6px 0;min-height:36px;display:inline-flex;align-items:center}
.footer-grid a:hover{text-decoration:underline}
.mobile-nav{display:none}
/* responsive: distinct mobile template */
@media(max-width:900px){.calc-layout{grid-template-columns:1fr}.result{position:static}.hero{grid-template-columns:1fr;gap:22px}}
@media(max-width:760px){
 nav.main{display:none}
 .wrap{padding:22px 16px 96px}
 .header-in{padding:0 16px}
 .lead{font-size:17.5px}
 .wiz-body{padding:20px 16px}.wiz-nav{padding:14px 16px}
 .bar-row{grid-template-columns:104px 1fr 72px;font-size:13.5px}
 .mobile-nav{display:flex;position:fixed;left:0;right:0;bottom:0;background:var(--surface);border-top:1px solid var(--border);z-index:50;box-shadow:0 -4px 16px rgba(15,23,42,.08)}
 .mobile-nav a{flex:1;text-align:center;color:var(--body);text-decoration:none;padding:8px 2px 10px;font-size:12px;font-weight:600;min-height:56px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px}
 .mobile-nav a svg{width:20px;height:20px;stroke:var(--muted)}
 .mobile-nav a[aria-current]{color:var(--primary-dark)} .mobile-nav a[aria-current] svg{stroke:var(--primary)}
 .stat{min-width:calc(50% - 6px);flex:1}
 .choices{grid-template-columns:1fr 1fr}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}html{scroll-behavior:auto}}