:root{--navy:#1f1747;--blue:#3b2d7a;--gold:#f2c14e;--ink:#23262f;--muted:#5f6472;--bg:#f7f6f2;--card:#fff;--line:#e3e0d8;--accent:#2f6fd6}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
a{color:var(--accent)}.wrap{max-width:960px;margin:0 auto;padding:0 16px}
header.top{background:var(--navy)}header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px}
.brand{display:flex;align-items:center;gap:8px;color:#fff;text-decoration:none;font-weight:800;font-size:21px;letter-spacing:.2px}.brand span,.hero h1 span{color:var(--gold)}.brand img{background:#fff;border-radius:50%;border:2px solid var(--gold)}header nav a{color:#dfe6f5;text-decoration:none;margin-left:16px;font-size:15px;white-space:nowrap}
@media (max-width:480px){.brand{font-size:16px}header nav a{margin-left:10px;font-size:14px}}
.hero{background:radial-gradient(circle at 12% 20%,rgba(242,193,78,.35) 0 1.5px,transparent 2px) 0 0/90px 90px,radial-gradient(circle at 60% 70%,rgba(255,255,255,.25) 0 1px,transparent 1.5px) 0 0/60px 60px,linear-gradient(160deg,var(--blue),var(--navy));color:#fff;padding:34px 0 40px}
.hero-in{display:flex;align-items:center;gap:28px}.hero-in>div{flex:1;min-width:0}.mascot{width:190px;height:auto;flex:none;filter:drop-shadow(0 10px 18px rgba(0,0,0,.35));animation:bob 4s ease-in-out infinite}
@keyframes bob{50%{transform:translateY(-8px) rotate(-2deg)}}@media (prefers-reduced-motion:reduce){.mascot{animation:none}}
.hero h1{margin:0;font-size:clamp(38px,7vw,60px);line-height:1.05;letter-spacing:-.5px}.hero .tag{font-size:19px;color:#fff;margin:6px 0 8px;font-weight:600}.bm{font-size:13px;color:#cfc6f0;margin:10px 0 0}
@media (max-width:640px){.hero-in{flex-direction:column;text-align:center;gap:10px}.mascot{width:130px}}
.hero p{max-width:620px;margin:0 0 16px;color:#e4defa}.hero input{width:100%;max-width:520px;padding:14px 18px;border-radius:999px;border:3px solid var(--gold);font-size:17px}
@media (max-width:640px){.hero p{margin-left:auto;margin-right:auto}}
h2{font-size:22px;margin:28px 0 12px}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px}
.card{display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 16px;text-decoration:none;color:var(--ink);transition:transform .1s,box-shadow .1s}
.card:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(0,0,0,.07)}.card b{display:block;margin-bottom:4px}.card span{color:var(--muted);font-size:14px}
.crumbs{font-size:14px;color:var(--muted);margin:18px 0 0}.tool h1{margin:4px 0 6px;font-size:clamp(26px,4.5vw,36px)}.lede{color:var(--muted);margin:0 0 18px;font-size:17px}
.calc{position:relative;display:grid;grid-template-columns:1.1fr 1fr;gap:18px;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px;margin-top:44px}
.peek{position:absolute;top:-58px;right:18px;width:66px;height:auto;pointer-events:none}.about-mascot{float:right;width:150px;height:auto;margin:0 0 10px 16px}
.results{border:2px solid #e7dcfb}.out.main b{color:#4b2fa0}
@media (max-width:720px){.calc{grid-template-columns:1fr}}
form label{display:block;font-weight:600;margin:10px 0 4px}form small{display:block;color:var(--muted);font-size:13px;margin-top:3px}
.field{display:flex;align-items:center;gap:8px}.field input,.field select,.field textarea{flex:1;min-width:0;padding:10px 12px;font-size:16px;border:1px solid #cfd3dc;border-radius:10px;background:#fff;font-family:inherit}
.unit{color:var(--muted);font-size:14px;white-space:nowrap}label.check{display:flex;gap:8px;align-items:center;font-weight:600}
.results{background:#f2f5fb;border-radius:12px;padding:14px;align-self:start}.out{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px solid #e1e6f0}
.out:last-child{border:0}.out b{text-align:right;font-variant-numeric:tabular-nums;word-break:break-word}.out.main b{font-size:24px;color:var(--blue)}.out ul{margin:0;padding-left:18px;text-align:left;font-weight:400}
.err{background:#fdecea;color:#8a1c12;border-radius:8px;padding:8px 10px;margin-bottom:8px}
article{max-width:760px}article p{margin:0 0 12px}details{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:10px 14px;margin-bottom:8px}summary{cursor:pointer;font-weight:600}
.prose{max-width:760px;padding-top:20px;padding-bottom:40px}.muted{color:var(--muted)}
footer{margin-top:48px;background:var(--navy);color:#c5cde0;font-size:14px}footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;padding:18px 16px}footer a{color:#fff}