:root{--bg:#f5f7fb;--card:#fff;--ink:#172033;--muted:#677189;--line:#dfe4ee;--brand:#2357e8;--soft:#eef3ff;--shadow:0 18px 45px #18254017;--radius:22px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:linear-gradient(180deg,#fbfcff 0%,var(--bg) 100%);color:var(--ink);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.wrap{max-width:1080px;margin:auto;padding:0 22px}.siteHeader{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:20;background:#ffffffd1;border-bottom:1px solid #dfe4eebf;padding:22px 0;position:sticky;top:0}.nav{justify-content:space-between;align-items:center;gap:18px;display:flex}.brand{letter-spacing:-.03em;font-size:22px;font-weight:850}.brand span{color:var(--brand)}nav{color:var(--muted);gap:22px;font-size:14px;display:flex}.hero{text-align:center;padding:72px 0 36px}.eyebrow{background:var(--soft);color:#3150b7;border:1px solid #dfe7ff;border-radius:999px;align-items:center;gap:8px;padding:7px 11px;font-size:13px;font-weight:700;display:inline-flex}.hero h1{letter-spacing:-.055em;max-width:820px;margin:20px auto 14px;font-size:clamp(38px,6vw,68px);line-height:.98}.hero p{color:var(--muted);max-width:680px;margin:0 auto;font-size:18px;line-height:1.6}.toolShell{grid-template-columns:minmax(0,1.25fr) minmax(280px,.75fr);align-items:start;gap:22px;margin:20px auto 56px;display:grid}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.calcCard{padding:26px}.titleRow{justify-content:space-between;align-items:flex-start;gap:14px;margin-bottom:22px;display:flex}.titleRow h2{letter-spacing:-.03em;margin:0;font-size:24px}.sub{color:var(--muted);margin-top:6px;font-size:14px}.unitToggle{white-space:nowrap;background:#f1f4f8;border-radius:12px;padding:4px;display:flex}.unitToggle button{color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:9px;padding:8px 11px;font-weight:750}.unitToggle button.active{color:var(--ink);background:#fff;box-shadow:0 1px 5px #00000014}.rooms{flex-direction:column;gap:14px;display:flex}.room{border:1px solid var(--line);background:#fcfdff;border-radius:18px;padding:18px}.roomHead{justify-content:space-between;align-items:center;margin-bottom:14px;display:flex}.roomName{font-weight:800}.remove{color:#a64a4a;cursor:pointer;background:0 0;border:0;font-size:13px;font-weight:700}.fields{grid-template-columns:1fr 1fr;gap:12px;display:grid}label{color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:7px;font-size:12px;font-weight:750;display:block}.inputWrap{background:#fff;border:1px solid #cfd6e4;border-radius:12px;align-items:center;transition:all .15s;display:flex;overflow:hidden}.inputWrap:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px #2357e81c}input{width:100%;color:var(--ink);background:0 0;border:0;outline:0;padding:13px 12px}.suffix{color:var(--muted);padding:0 12px;font-size:13px;font-weight:700}.options{grid-template-columns:1fr 1fr;gap:12px;margin-top:18px;display:grid}.optionBox{border:1px solid var(--line);background:#fff;border-radius:14px;padding:14px}.optionBox select{width:100%;color:var(--ink);background:0 0;border:0;outline:0;padding:3px 0}.priceInput{align-items:center;gap:6px;display:flex}.priceInput input{padding:3px 0}.actions{flex-wrap:wrap;gap:10px;margin-top:16px;display:flex}.btn{cursor:pointer;border:0;border-radius:12px;padding:11px 14px;font-size:14px;font-weight:800}.btnSecondary{background:var(--soft);color:#254bbd}.btnGhost{color:#536078;background:#f5f6f8}.resultCard{color:#fff;background:linear-gradient(145deg,#14244c,#284fbc);border:0;padding:26px;position:sticky;top:92px}.resultLabel{opacity:.72;text-transform:uppercase;letter-spacing:.06em;font-size:13px;font-weight:800}.big{letter-spacing:-.055em;margin:10px 0 3px;font-size:52px;font-weight:900;line-height:1}.big small{letter-spacing:-.01em;opacity:.86;font-size:20px;font-weight:750}.metric{opacity:.74;margin-bottom:24px}.divider{background:#ffffff29;height:1px;margin:20px 0}.resultGrid{grid-template-columns:1fr 1fr;gap:18px;display:grid}.resultItem span{opacity:.68;margin-bottom:4px;font-size:12px;display:block}.resultItem strong{font-size:19px}.formula{color:#e4eaff;background:#ffffff17;border:1px solid #ffffff1f;border-radius:14px;margin-top:20px;padding:14px;font-size:13px;line-height:1.55}.section{padding:34px 0 70px}.section h2{text-align:center;letter-spacing:-.04em;margin:0 0 10px;font-size:34px}.sectionIntro{text-align:center;color:var(--muted);max-width:650px;margin:0 auto 28px;line-height:1.65}.toolsGrid{grid-template-columns:repeat(3,1fr);gap:14px;display:grid}.mini{border:1px solid var(--line);background:#fff;border-radius:17px;padding:19px}.mini .icon{margin-bottom:10px;font-size:24px}.mini strong{margin-bottom:5px;display:block}.mini span{color:var(--muted);font-size:13px;line-height:1.45}.howSection{padding-top:0}.howGrid{grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px;display:grid}.step{border:1px solid var(--line);background:#fff;border-radius:17px;padding:20px}.num{background:var(--soft);width:34px;height:34px;color:var(--brand);border-radius:10px;place-items:center;margin-bottom:12px;font-weight:900;display:grid}.step p{color:var(--muted);margin-bottom:0;font-size:14px;line-height:1.55}footer{border-top:1px solid var(--line);color:var(--muted);text-align:center;padding:30px 0 42px;font-size:13px}@media (max-width:800px){nav{display:none}.hero{padding-top:48px}.toolShell{grid-template-columns:1fr}.resultCard{position:relative;top:auto}.toolsGrid,.howGrid{grid-template-columns:1fr 1fr}}@media (max-width:520px){.wrap{padding:0 14px}.hero{padding-top:38px}.hero h1{font-size:43px}.hero p{font-size:16px}.calcCard,.resultCard{border-radius:18px;padding:18px}.titleRow{display:block}.unitToggle{margin-top:15px;display:inline-flex}.fields,.options,.toolsGrid,.howGrid,.resultGrid{grid-template-columns:1fr}.big{font-size:44px}}