:root{--navy:#0a1b39;--royal:#004aac;--royal2:#1460c6;--ink:#1b2b40;--muted:#55677e;--line:#dce5f0;--bg:#f3f7fb;--mint:#13aa90;--white:#fff;--danger:#a32832}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:16px;line-height:1.6}
.wrapper{width:min(calc(100% - 32px),1180px);margin-inline:auto}a{color:var(--royal)}button,input{font:inherit}button:focus-visible,input:focus-visible,a:focus-visible{outline:3px solid #7cbeff;outline-offset:3px}
.topbar{background:#050f2a;padding:13px 0}.topbar img{height:auto;width:170px;display:block}
.skip{position:absolute;top:-200px;left:12px;background:#fff;padding:10px;z-index:10}.skip:focus{top:10px}
main{padding:26px 0 64px}.crumb{display:flex;gap:10px;align-items:center;flex-wrap:wrap;font-size:.88rem;color:var(--muted);margin-bottom:22px}
.crumb a{text-decoration:none}.crumb a:hover{text-decoration:underline}
.hero{background:linear-gradient(125deg,#081734,#0b3774);color:white;border-radius:24px;padding:clamp(25px,5vw,58px);display:grid;grid-template-columns:1.4fr .6fr;gap:28px;overflow:hidden;position:relative;box-shadow:0 20px 42px rgba(7,28,68,.12)}
.eyebrow{font-size:.72rem;letter-spacing:.13em;font-weight:800;text-transform:uppercase;color:#0e78b7;margin:0 0 12px}.hero .eyebrow{color:#94d5ff}h1{font-size:clamp(2rem,4.6vw,3.7rem);line-height:1.12;letter-spacing:-.035em;margin:0 0 18px}h1 em{font-style:normal;color:#72d9cf}.hero p.lead{font-size:1.06rem;color:#dae7f9;max-width:62ch;margin:0}.pills{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}.pills span{border:1px solid rgba(235,248,255,.28);background:#ffffff14;padding:5px 11px;border-radius:30px;font-size:.82rem}
.roof-visual{align-self:center;justify-self:center;width:min(100%,260px);aspect-ratio:1;display:grid;place-items:center;border-radius:22px;border:1px solid #badfff3d;background:radial-gradient(circle at 70% 25%,#3bb9d544,transparent 60%)}.roof-svg{width:95%;max-height:220px;transform:rotate(-10deg);filter:drop-shadow(5px 14px 15px #0007)}
.work{display:grid;grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);gap:18px;align-items:start;margin-top:22px}.card{background:white;border:1px solid var(--line);border-radius:19px;padding:clamp(18px,3vw,30px);box-shadow:0 6px 24px #1d3d7308;min-width:0}
.card h2{font-size:clamp(1.35rem,2vw,1.65rem);line-height:1.25;margin:0 0 12px;color:var(--navy)}.intro{margin-top:0;color:var(--muted);font-size:.93rem}
fieldset{margin:19px 0 0;border:0;padding:0}legend{font-weight:750;border-bottom:1px solid var(--line);width:100%;padding-bottom:8px;color:var(--navy)}.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 12px;margin-top:13px}.field{min-width:0;display:flex;flex-direction:column}.field label{font-weight:700;font-size:.88rem;margin-bottom:5px}.field input{border:1px solid #c4d2e2;border-radius:10px;width:100%;height:46px;padding:9px 11px;background:#fff;color:var(--navy)}.field small{font-size:.75rem;line-height:1.4;color:var(--muted);padding-top:4px}.full{grid-column:1/-1}
.hint{color:var(--muted);font-size:.83rem;margin:8px 0}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.btn{appearance:none;display:inline-flex;align-items:center;justify-content:center;text-decoration:none;border-radius:11px;border:1px solid var(--royal);font-weight:700;min-height:46px;padding:10px 16px;cursor:pointer}.btn.primary{background:var(--royal);color:white}.btn.primary:hover{background:#073d89}.btn.ghost{color:var(--royal);background:#fff}.btn.ghost:hover{background:#eaf2ff}.btn[disabled]{opacity:.5;cursor:not-allowed}
.error{border-left:4px solid var(--danger);background:#fff3f4;color:#8b1720;padding:12px;margin:14px 0;border-radius:7px}.privacy{margin:14px 0 0;font-size:.79rem;color:var(--muted)}
.empty{border:2px dashed #cbd8e9;background:#f8fbff;border-radius:14px;padding:36px 18px;text-align:center}.empty-icon{font-size:2.4rem;display:block}.empty strong{display:block;color:var(--navy)}.empty p{margin:7px auto 0;max-width:31ch;color:var(--muted)}
.stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.stat{background:#f5f8fd;border:1px solid #e1eaf5;border-radius:12px;padding:12px}.stat span{display:block;font-size:.76rem;color:var(--muted);min-height:2.4em}.stat strong{font-size:clamp(1.35rem,3.5vw,1.9rem);display:block;overflow-wrap:anywhere;color:var(--navy);line-height:1.25}.stat.feature{background:#eaf4ff;border-color:#bfdaff;grid-column:1/-1}.stat.feature strong{color:var(--royal);font-size:2.35rem}
.table-scroll{overflow:auto;margin-top:14px}.table{width:100%;border-collapse:collapse;min-width:310px}.table th,.table td{border-bottom:1px solid #e4ebf4;padding:9px 5px;text-align:left;font-size:.9rem}.table th:last-child,.table td:last-child{text-align:right;font-variant-numeric:tabular-nums}.table th{font-size:.78rem;color:var(--muted)}.table tr.total td{font-weight:800;color:var(--royal);border-top:2px solid #b8cae3}
.cost{background:#0b2347;color:white;padding:17px 18px;border-radius:13px;margin:18px 0}.cost span{display:block;font-size:.82rem}.cost strong{display:block;font-size:clamp(1.4rem,3vw,2rem)}.cost small{display:block;color:#d4e7fc}
h3{font-size:1.06rem;color:var(--navy);margin:20px 0 8px}.formulas{padding:12px 16px;border-radius:12px;background:#f7fafc}.formulas p{margin:9px 0;font-size:.82rem;overflow-wrap:anywhere}.caution{font-size:.85rem;background:#fff7e8;border-left:3px solid #e7a025;padding:12px 14px;color:#634b1d}
.guide{margin-top:20px}.guide-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.guide-grid div{border-top:3px solid var(--mint);padding-top:10px}.guide-grid p{font-size:.88rem;color:var(--muted);margin:5px 0}.faq details{border-bottom:1px solid var(--line);padding:12px 0}.faq summary{font-weight:700;cursor:pointer}.faq p{color:var(--muted);font-size:.91rem}.related{margin:18px 0 0;font-size:.89rem}
.cta{display:grid;grid-template-columns:1fr auto;align-items:center;gap:20px;background:#e9f7f5;border-color:#b9e4dc;margin-top:20px}.cta h2{margin:0}.cta p{font-size:.9rem;margin:8px 0}.cta .disclosure{font-size:.78rem;color:#3b5b57}.back{margin:22px 0 0}
@media(max-width:830px){.hero{grid-template-columns:1fr}.roof-visual{display:none}.work{grid-template-columns:1fr}.guide-grid{grid-template-columns:1fr}.cta{grid-template-columns:1fr}}
@media(max-width:420px){.wrapper{width:calc(100% - 22px)}.hero{border-radius:16px;padding:23px}.card{border-radius:14px;padding:17px}.fields{grid-template-columns:1fr}.stats{gap:8px}.stat{padding:10px}.actions .btn{width:100%}}
@media print{body{background:#fff}.topbar,.skip,.hero,.form-card,.guide,.faq,.cta,.back,.actions,.privacy,.crumb,.ent-site-footer{display:none!important}.work{display:block;margin:0}.card{border:0;box-shadow:none;padding:0}main{padding:0}.result-card{width:100%}.stats{grid-template-columns:repeat(3,1fr)}.stat.feature{grid-column:auto}.formulas p{break-inside:avoid}#results{display:block!important}}