:root{--bg:#0b1220;--card:#142238;--line:#263b59;--text:#f7fbff;--muted:#aebbd0;--accent:#ff8a1f;--accent2:#ffc34d;--light:#f5f7fb;--dark:#0d1728}
*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text);line-height:1.55}a{color:inherit}.container{width:min(1120px,92%);margin:auto}.site-header{position:sticky;top:0;background:#0b1220f2;border-bottom:1px solid var(--line);z-index:10}.nav{display:flex;justify-content:space-between;align-items:center;padding:16px 0;gap:20px}.brand{text-decoration:none;font-weight:900;font-size:1.25rem;display:flex;gap:10px;align-items:center}.mark{display:grid;place-items:center;width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#111}.navlinks{display:flex;gap:18px;flex-wrap:wrap}.navlinks a{text-decoration:none;font-weight:700;color:#dce6f3}.hero{padding:78px 0 56px;background:radial-gradient(circle at 80% 10%,#ff8a1f26,transparent 30%),linear-gradient(180deg,#0e1728,#0b1220)}.eyebrow{display:inline-block;border:1px solid #3a4a66;border-radius:999px;padding:6px 10px;color:#ffd69d;font-weight:800;font-size:.78rem;text-transform:uppercase;letter-spacing:.08em}.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:42px;align-items:center;margin-top:24px}h1{font-size:clamp(2.6rem,6vw,5rem);line-height:.98;letter-spacing:-.05em;margin:.15em 0 .25em}.hero p{color:#c5d0df;font-size:1.1rem}.hero-card{background:linear-gradient(180deg,#16253e,#101a2b);border:1px solid #2b3f5d;border-radius:22px;padding:26px}.stat{font-size:2.6rem;font-weight:900}.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 18px;border-radius:12px;text-decoration:none;font-weight:900;border:1px solid transparent;cursor:pointer;font-size:1rem}.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#151515}.secondary{border-color:#3a4d6a;background:#111d31}.row{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.section{padding:60px 0}.light{background:var(--light);color:var(--dark)}.tool-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.tool{display:block;text-decoration:none;background:#fff;color:#111b2a;border:1px solid #dfe5ed;border-radius:18px;padding:22px}.tool small{color:#677489}.calc-wrap{width:min(900px,92%);margin:36px auto}.calc{background:#fff;color:#111b2a;border-radius:22px;padding:26px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}label{display:block;font-weight:800;margin:12px 0 7px}input,select{width:100%;padding:13px;border:1px solid #cfd7e2;border-radius:11px;font:inherit}.appliances{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:14px 0}.check{display:flex;justify-content:space-between;align-items:center;border:1px solid #d7dfe9;border-radius:12px;padding:12px;background:#f9fbfd}.check input{width:auto}.result{display:none;margin-top:20px;background:#0f1c30;color:#fff;border-radius:18px;padding:24px}.result.show{display:block}.big{font-size:clamp(2.4rem,7vw,4.4rem);font-weight:950;line-height:1}.result-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:18px 0}.box{background:#1a2a44;border:1px solid #304761;border-radius:14px;padding:15px}.box b{display:block;font-size:1.25rem}.muted{color:var(--muted)}.aff{margin-top:18px;padding:18px;background:#14243b;border:1px solid #3a4e6b;border-radius:15px}.disc{font-size:.78rem;color:#9faec2;margin-top:10px}.article{width:min(820px,92%);margin:auto}.footer{border-top:1px solid var(--line);padding:28px 0;color:#9eacc0}.foot{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
@media(max-width:820px){.hero-grid,.tool-grid,.form-grid,.appliances,.result-grid{grid-template-columns:1fr}.nav{align-items:flex-start}}