:root{--ink:#102a2a;--muted:#607070;--brand:#0f8f88;--brand2:#08645f;--bg:#f4fbfa;--card:#fff;--line:#d9e9e7;--shadow:0 16px 40px rgba(9,63,60,.10)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;background:linear-gradient(180deg,#effaf8,#fff 35%);color:var(--ink);line-height:1.65}header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.nav{max-width:1120px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:12px 16px}.brand{font-weight:900;font-size:1.35rem;text-decoration:none;color:var(--ink)}.brand span{color:var(--brand)}#menu{display:block;border:0;background:#e7f6f4;border-radius:10px;padding:9px 12px;font-size:1.2rem}nav{display:none;position:absolute;left:12px;right:12px;top:58px;background:white;border:1px solid var(--line);border-radius:14px;padding:10px;box-shadow:var(--shadow)}nav.open{display:grid}nav a{padding:10px;text-decoration:none;color:var(--ink);font-weight:700}.hero{max-width:1120px;margin:auto;padding:42px 16px 25px}.eyebrow{font-size:.78rem;font-weight:900;color:var(--brand);letter-spacing:.12em}.hero h1{font-size:clamp(2rem,7vw,3.5rem);line-height:1.05;margin:8px 0}.hero p{max-width:780px;color:var(--muted);font-size:1.05rem}.pills{display:flex;flex-wrap:wrap;gap:8px}.pills span{background:#e5f5f3;border:1px solid #cbe9e6;border-radius:999px;padding:6px 10px;font-size:.82rem;font-weight:800}.grid{max-width:1120px;margin:auto;padding:10px 16px;display:grid;gap:18px}.card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:var(--shadow);margin:18px auto;max-width:1120px}.form h2,.card h2{margin-top:0}label{display:block;font-weight:800;margin:13px 0}input,select{width:100%;padding:12px;border:1px solid #cfe2e0;border-radius:12px;background:white;color:var(--ink);font:inherit;margin-top:6px}.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.primary,.secondary,.actions button{border:0;border-radius:12px;padding:12px 15px;font-weight:900;cursor:pointer}.primary{width:100%;background:var(--brand);color:white;margin-top:10px}.secondary{width:100%;margin-top:9px;background:#eaf5f3;color:var(--brand2)}details{border-top:1px solid var(--line);padding:12px 0}summary{cursor:pointer;font-weight:900}.hint,.muted{color:var(--muted);font-size:.9rem}.result-top{display:flex;justify-content:space-between;align-items:center}.big{font-size:clamp(2.4rem,10vw,4.2rem);font-weight:950;line-height:1.05;margin:5px 0;animation:pop .6s ease}.orb{width:74px;height:74px;border-radius:50%;display:grid;place-items:center;background:#e5f6f3;font-size:2rem;animation:float 2.4s ease-in-out infinite}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:20px 0}.stats div{background:#f2f9f8;border-radius:14px;padding:12px;text-align:center}.stats b{display:block;font-size:1.1rem}.stats span{font-size:.72rem;color:var(--muted)}.meter{height:13px;background:#e7eeee;border-radius:99px;overflow:hidden}.meter div{height:100%;width:0;background:linear-gradient(90deg,var(--brand),#64cfc7);transition:width .8s ease}.notice{margin:14px 0;padding:12px;border-radius:12px;background:#f4faf9;color:var(--muted)}.actions{display:flex;flex-wrap:wrap;gap:8px}.actions button{background:#e8f4f2;color:var(--brand2)}.tablewrap{overflow:auto}table{width:100%;border-collapse:collapse;min-width:430px}th,td{text-align:left;padding:10px;border-bottom:1px solid var(--line)}.formula-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px}.formula{padding:15px;border:1px solid var(--line);border-radius:16px;background:#f9fdfc;animation:slide .5s ease}.formula h3{margin:0 0 4px}.formula .num{font-size:1.3rem;font-weight:900;color:var(--brand)}.article h3{margin-top:28px}.article code{background:#eef7f5;padding:3px 7px;border-radius:6px}.article p{color:#3f5655}.article{font-size:1rem}.article details p{margin-bottom:0}footer{text-align:center;padding:35px 16px;background:#0b3332;color:white;margin-top:30px}@keyframes pop{from{transform:scale(.85);opacity:0}to{transform:scale(1);opacity:1}}@keyframes float{50%{transform:translateY(-7px)}}@keyframes slide{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}@media(min-width:760px){#menu{display:none}nav{display:flex;position:static;border:0;box-shadow:none;padding:0;gap:4px}nav a{padding:7px 10px}.grid{grid-template-columns:1fr 1fr}.hero{padding-top:65px}.card{padding:28px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}@media print{header,.actions,.form,.hero,footer{display:none!important}.card{box-shadow:none;border:1px solid #ccc}.grid{display:block}}