:root{--bg: #0f1419;--bg-muted: #151c24;--surface: #1a232d;--text: #e8ecf0;--text-muted: #94a3b8;--accent: #3d9a6b;--accent-hover: #4caf7a;--accent-soft: rgba(61, 154, 107, .15);--border: rgba(255, 255, 255, .08);--radius: 12px;--radius-lg: 20px;--font: "Manrope", system-ui, -apple-system, sans-serif;--shadow: 0 24px 48px rgba(0, 0, 0, .35)}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:var(--font);font-size:1rem;line-height:1.6;color:var(--text);background:var(--bg)}img{max-width:100%;height:auto;display:block}a{color:var(--accent);text-decoration:none}a:hover{color:var(--accent-hover)}.container{width:min(1120px,92vw);margin-inline:auto}.header{position:sticky;top:0;z-index:50;background:#0f1419eb;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}.header__inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.85rem 0}.logo{font-weight:700;font-size:1.25rem;color:var(--text);letter-spacing:-.02em}.logo span{color:var(--accent)}.nav{display:flex;gap:1.25rem}.nav a{color:var(--text-muted);font-size:.9rem;font-weight:500}.nav a:hover{color:var(--text)}.header__cta{flex-shrink:0}.burger{display:none;flex-direction:column;gap:5px;background:none;border:none;padding:8px;cursor:pointer}.burger span{display:block;width:22px;height:2px;background:var(--text);border-radius:1px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.65rem 1.25rem;font-family:inherit;font-weight:600;font-size:.9rem;border-radius:var(--radius);border:1px solid transparent;cursor:pointer;transition:background .2s,color .2s,border-color .2s}.btn--sm{padding:.5rem 1rem;font-size:.85rem}.btn--lg{padding:.85rem 1.5rem;font-size:1rem}.btn--primary{background:var(--accent);color:#fff}.btn--primary:hover{background:var(--accent-hover);color:#fff}.btn--ghost{background:transparent;color:var(--text);border-color:var(--border)}.btn--ghost:hover{background:var(--surface);color:var(--text)}.hero{padding:3.5rem 0 4rem}.hero__grid{display:grid;grid-template-columns:1fr 1fr;gap:2.5rem;align-items:center}.hero__content h1{font-size:clamp(1.85rem,4vw,2.65rem);line-height:1.15;letter-spacing:-.03em;margin:0 0 1rem}.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.72rem;font-weight:600;color:var(--accent);margin:0 0 .75rem}.lead{color:var(--text-muted);font-size:1.05rem;margin:0 0 1.75rem;max-width:36ch}.lead strong{color:var(--text)}.hero__actions{display:flex;flex-wrap:wrap;gap:.75rem}.hero__visual{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--border)}.hero__visual img{width:100%;aspect-ratio:4/3;object-fit:cover}.section{padding:4rem 0}.section--muted{background:var(--bg-muted)}.section__title{font-size:clamp(1.5rem,3vw,2rem);margin:0 0 .5rem;letter-spacing:-.02em}.section__subtitle{color:var(--text-muted);max-width:60ch;margin:0 0 2rem}.cards{display:grid;gap:1.25rem}.cards--3{grid-template-columns:repeat(3,1fr)}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem}.card__icon{font-size:2rem;margin-bottom:.75rem}.card h3{font-size:1.1rem;margin:0 0 .5rem}.card p{margin:0;color:var(--text-muted);font-size:.95rem}.fitting-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.25rem}.fitting-card{margin:0;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.fitting-card img{width:100%;aspect-ratio:7/5;object-fit:contain;background:linear-gradient(160deg,#1e2936,#0f1419);padding:1rem}.fitting-card figcaption{padding:1rem 1.25rem;font-size:.9rem;color:var(--text-muted)}.note{margin-top:1.5rem;font-size:.85rem;color:var(--text-muted)}.note code{background:var(--accent-soft);padding:.15rem .45rem;border-radius:6px;font-size:.8em}.polycarb-table{overflow-x:auto}.polycarb-table table{width:100%;border-collapse:collapse;background:var(--surface);border-radius:var(--radius);overflow:hidden;border:1px solid var(--border)}.polycarb-table th,.polycarb-table td{text-align:left;padding:1rem 1.25rem;border-bottom:1px solid var(--border)}.polycarb-table th{background:#3d9a6b1f;color:var(--text);font-weight:600;font-size:.85rem}.polycarb-table tr:last-child td{border-bottom:none}.polycarb-table td{color:var(--text-muted);font-size:.95rem}.table-hint{margin-top:.75rem;font-size:.85rem;color:var(--text-muted)}.calc{display:grid;gap:1.5rem}@media (min-width: 768px){.calc{grid-template-columns:1fr 340px;align-items:start}}.calc__grid{display:grid;gap:1rem}.field{display:flex;flex-direction:column;gap:.35rem}.field__label{font-size:.85rem;font-weight:500;color:var(--text-muted)}.field input,.field select{font-family:inherit;font-size:1rem;padding:.75rem 1rem;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface);color:var(--text)}.field input:focus,.field select:focus{outline:2px solid var(--accent);outline-offset:2px}.field--check{flex-direction:row;align-items:center;gap:.65rem}.field--check input{width:1.1rem;height:1.1rem;accent-color:var(--accent)}.calc__result{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem;box-shadow:var(--shadow)}.calc__label{margin:0 0 .25rem;font-size:.85rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em}.calc__sum{margin:0 0 1rem;font-size:2rem;font-weight:700;color:var(--accent);letter-spacing:-.02em}.calc__breakdown{margin:0;padding-left:1.1rem;color:var(--text-muted);font-size:.9rem}.calc__breakdown li{margin-bottom:.35rem}.calc__disclaimer{grid-column:1 / -1;margin:0;font-size:.85rem;color:var(--text-muted)}.examples{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem}.example{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.example img{width:100%;aspect-ratio:16/10;object-fit:cover}.example__body{padding:1.25rem}.example h3{margin:0 0 .35rem;font-size:1.05rem}.example p{margin:0;font-size:.9rem;color:var(--text-muted)}.cta{padding:3.5rem 0;background:linear-gradient(135deg,rgba(61,154,107,.18) 0%,var(--bg) 50%);border-top:1px solid var(--border)}.cta__inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1.5rem}.cta__title{margin-bottom:.5rem}.cta__text{margin:0;color:var(--text-muted);max-width:40ch}.cta__actions{display:flex;flex-wrap:wrap;gap:.75rem}.footer{padding:2rem 0;border-top:1px solid var(--border)}.footer__inner{text-align:center}.footer p{margin:.5rem 0 0;color:var(--text-muted);font-size:.9rem}.footer__copy{font-size:.8rem;margin-top:1rem}@media (max-width: 900px){.hero__grid{grid-template-columns:1fr}.hero__visual{order:-1}.cards--3,.fitting-grid,.examples{grid-template-columns:1fr}.nav{display:none}.burger{display:flex}.header__cta{display:none}}@media (max-width: 900px){body.nav-open .nav{display:flex;flex-direction:column;position:absolute;top:100%;left:0;right:0;background:var(--bg);padding:1rem 1.5rem 1.5rem;border-bottom:1px solid var(--border)}.header__inner{position:relative}}