:root{--ink:#102a43;--muted:#627d98;--brand:#0e9f9a;--brand2:#087f86;--bg:#f4fbfb;--card:#fff;--line:#d9e7e7;--shadow:0 12px 35px #0b6b7118}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65}header{position:sticky;top:0;z-index:20;background:#ffffffef;backdrop-filter:blur(12px);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:12px max(18px,calc((100% - 1120px)/2))}.brand{font-size:1.35rem;font-weight:900;color:var(--brand);text-decoration:none}#menuBtn{display:none;border:0;background:none;font-size:1.5rem}nav{display:flex;gap:18px}nav a{color:var(--ink);text-decoration:none;font-weight:700;font-size:.92rem}main{max-width:1120px;margin:auto;padding:25px 16px}.hero{padding:35px 8px 25px}.eyebrow{color:var(--brand);font-weight:900;font-size:.78rem;letter-spacing:.08em}.hero h1{font-size:clamp(2rem,6vw,3.4rem);line-height:1.05;margin:10px 0}.hero p{max-width:720px;color:var(--muted);font-size:1.05rem}.pills{display:flex;flex-wrap:wrap;gap:8px}.pills span{background:#dff7f4;color:#086c70;border-radius:999px;padding:6px 11px;font-weight:800;font-size:.78rem}.grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.card,.disclaimer{background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:22px;margin:18px 0}.card h2{margin-top:0}.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}label{font-weight:800;font-size:.9rem;display:block;margin:12px 0}input,select{width:100%;padding:12px;border:1px solid #c8dddd;border-radius:12px;background:#fff;color:var(--ink);font:inherit;margin-top:6px}small{display:block;color:var(--muted);font-weight:500;margin-top:4px}.advanced{background:#f2fafa;border:1px solid var(--line);border-radius:15px;padding:14px;margin-top:15px}.advanced h3{margin:0}.check{font-weight:600}.check input{width:auto;margin-right:8px}.primary,.secondary,.actions button{border:0;border-radius:12px;padding:12px 16px;font-weight:900;cursor:pointer;margin:8px 5px 0 0}.primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:white}.secondary,.actions button{background:#eaf5f5;color:var(--brand2)}.result{text-align:center;overflow:hidden}.heart{font-size:3.5rem;color:#e65353;animation:pulse 1.4s infinite}.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.metrics div{background:#f2fafa;border-radius:14px;padding:10px}.metrics b{display:block;font-size:1.35rem;color:var(--brand2)}.metrics span{font-size:.72rem;color:var(--muted);font-weight:700}.zones{text-align:left;margin-top:16px}.zone{padding:12px;margin:8px 0;border:1px solid var(--line);border-radius:13px;position:relative;overflow:hidden}.zone::before{content:"";position:absolute;left:0;top:0;bottom:0;width:var(--w);background:#0e9f9a22}.zone b,.zone span{position:relative}.steps{text-align:left;color:var(--muted);font-size:.9rem;margin-top:15px}.formula{background:#eef9f8;border-left:4px solid var(--brand);padding:14px;border-radius:8px}.info,.article,.disclaimer{max-width:100%}.article h3{color:var(--brand2)}details{border-top:1px solid var(--line);padding:14px 0}summary{cursor:pointer;font-weight:900}.disclaimer{background:#fff8e8;border-color:#f0d89a;color:#674d13}footer{text-align:center;padding:30px;color:var(--muted);font-size:.85rem}@keyframes pulse{50%{transform:scale(1.13)} }@media(max-width:760px){#menuBtn{display:block}nav{display:none;position:absolute;top:60px;left:0;right:0;background:#fff;padding:12px 18px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);flex-direction:column}nav.open{display:flex}.grid{grid-template-columns:1fr}.row{grid-template-columns:1fr}.card{padding:18px;border-radius:16px}.hero{padding-top:25px}.metrics b{font-size:1.1rem}.actions button{width:calc(50% - 8px)}}@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important}}