:root{--green: #059669;--green-strong: #047857;--green-soft: #ecfdf5;--green-ring: #d1fae5;--page: #f1f5f9;--card: #ffffff;--input-bg: #ffffff;--border: #e2e8f0;--border-strong: #cbd5e1;--text: #0f172a;--text-muted: #64748b;--cat-under: #60a5fa;--cat-normal: #34d399;--cat-over: #fbbf24;--cat-mod: #fb923c;--cat-sev: #f87171;--cat-vsev: #ef4444;--radius: 16px;--radius-sm: 10px;--shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 8px 24px rgba(15, 23, 42, .06);--shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);--font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:var(--font);background:var(--page);color:var(--text);min-height:100vh;line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}.page{max-width:860px;margin:0 auto;padding:56px 20px 80px}.hero{text-align:center;margin-bottom:28px}.hero h1{font-size:clamp(2rem,4vw,2.75rem);font-weight:800;letter-spacing:-.02em;margin:0 0 6px}.hero .tagline{color:var(--text-muted);font-size:1.05rem;margin:0 auto;max-width:540px}.byline{display:inline-flex;align-items:center;gap:12px;margin:18px auto 0;padding:8px 16px 8px 8px;background:var(--card);border:1px solid var(--border);border-radius:999px;box-shadow:var(--shadow-sm)}.byline .avatar{width:38px;height:38px;border-radius:50%;flex:none;background:var(--green-soft);display:grid;place-items:center;overflow:hidden}.byline .meta{text-align:left;font-size:.82rem;line-height:1.35}.byline .meta .who{color:var(--text)}.byline .meta .who strong{font-weight:700}.byline .meta .role{color:var(--green);font-weight:600}.byline .verified{color:var(--green);display:inline-flex;vertical-align:middle;margin-left:4px}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px}.card-title{font-size:1.35rem;font-weight:700;margin:0 0 22px;color:var(--green)}.toggle{display:flex;background:var(--page);border:1px solid var(--border);border-radius:var(--radius-sm);padding:4px;width:max-content;margin:0 0 24px auto}.toggle button{background:transparent;color:var(--text-muted);border:none;padding:8px 18px;font-size:.9rem;font-weight:600;font-family:inherit;border-radius:7px;cursor:pointer;transition:background .15s,color .15s,box-shadow .15s}.toggle button.active{background:var(--green);color:#fff;box-shadow:var(--shadow-sm)}.field{margin-bottom:18px}label{display:block;font-size:.9rem;font-weight:600;color:var(--text);margin-bottom:7px}.input-row{display:flex;gap:10px}input[type=number]{width:100%;background:var(--input-bg);border:1px solid var(--border-strong);border-radius:var(--radius-sm);color:var(--text);padding:12px 14px;font-size:1rem;font-family:inherit;outline:none;transition:border-color .15s,box-shadow .15s;-moz-appearance:textfield}input[type=number]::-webkit-outer-spin-button,input[type=number]::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}input[type=number]::placeholder{color:#94a3b8}input[type=number]:focus{border-color:var(--green);box-shadow:0 0 0 3px var(--green-ring)}.btn{display:block;width:100%;background:var(--green);color:#fff;border:none;border-radius:var(--radius-sm);padding:14px;font-size:1.05rem;font-weight:700;font-family:inherit;cursor:pointer;margin-top:8px;transition:background .15s;text-align:center;text-decoration:none}.btn:hover{background:var(--green-strong)}.btn.secondary{background:var(--green-soft);color:var(--green-strong)}.btn.secondary:hover{background:var(--green-ring)}.error{color:var(--cat-vsev);font-size:.85rem;margin-top:10px;min-height:1.2em}.bmi-value{font-size:3.6rem;font-weight:800;text-align:center;margin:4px 0 0;line-height:1;letter-spacing:-.02em}.bmi-category{text-align:center;font-size:1.15rem;font-weight:700;margin:10px 0 22px}.chart-wrap{margin:18px 0 10px}.chart-wrap svg{width:100%;height:auto;display:block}.legend{display:flex;flex-wrap:wrap;gap:8px 14px;justify-content:center;margin:6px 0 24px;font-size:.76rem;color:var(--text-muted)}.legend-item{display:inline-flex;align-items:center;gap:6px}.legend-item.active{color:var(--text);font-weight:700}.legend-swatch{width:12px;height:12px;border-radius:3px;flex:none}.detail{display:flex;justify-content:space-between;padding:13px 0;border-top:1px solid var(--border);font-size:.95rem}.detail span:first-child{color:var(--text-muted)}.detail span:last-child{font-weight:600}.guidance{background:var(--green-soft);border:1px solid var(--green-ring);border-radius:var(--radius-sm);padding:14px 16px;font-size:.92rem;color:#065f46;margin:22px 0}.disclaimer{font-size:.78rem;color:var(--text-muted);text-align:center;margin-top:18px}.product{margin:24px 0 6px;background:linear-gradient(135deg,var(--green-soft),#fff);border:1px solid var(--green-ring);border-radius:var(--radius);padding:24px;position:relative;overflow:hidden}.product:before{content:"";position:absolute;inset:0 auto 0 0;width:4px;background:var(--green)}.product-tag{display:inline-block;font-size:.68rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--green-strong);background:var(--green-ring);border-radius:999px;padding:4px 10px;margin-bottom:12px}.product-title{font-size:1.2rem;font-weight:700;margin:0 0 8px}.product-desc{font-size:.92rem;color:var(--text-muted);margin:0 0 18px}.product-cta{display:inline-block;background:var(--green);color:#fff;font-weight:700;font-size:.95rem;text-decoration:none;padding:11px 22px;border-radius:var(--radius-sm);transition:background .15s}.product-cta:hover{background:var(--green-strong)}.content{margin-top:40px}.content section{margin-bottom:30px}.content h2{font-size:1.4rem;font-weight:700;letter-spacing:-.01em;margin:0 0 12px;display:flex;align-items:center;gap:10px}.content h2 .ico{width:26px;height:26px;color:var(--green);flex:none}.content p{margin:0 0 14px;color:#334155}.content .lead{font-size:1.05rem}.formula-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.formula{background:var(--page);border:1px solid var(--border);border-radius:var(--radius-sm);padding:18px 20px}.formula .label{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);margin-bottom:8px}.formula .eq{font-size:1.05rem;font-weight:600}.formula .eq .frac{display:inline-flex;flex-direction:column;text-align:center;vertical-align:middle;margin:0 4px}.formula .eq .frac .num{border-bottom:2px solid var(--text);padding:0 6px 2px}.formula .eq .frac .den{padding:2px 6px 0}.cat-table{width:100%;border-collapse:collapse;font-size:.92rem;overflow:hidden;border-radius:var(--radius-sm);border:1px solid var(--border)}.cat-table th,.cat-table td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--border)}.cat-table th{background:var(--page);font-weight:700;font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;color:var(--text-muted)}.cat-table tr:last-child td{border-bottom:none}.cat-table .dot{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:8px;vertical-align:middle}.facts{list-style:none;margin:0;padding:0;display:grid;gap:12px}.facts li{display:flex;gap:10px;align-items:flex-start;color:#334155;font-size:.95rem}.facts li svg{width:20px;height:20px;color:var(--green);flex:none;margin-top:2px}.site-footer{text-align:center;color:var(--text-muted);font-size:.82rem;margin-top:40px}@media(max-width:560px){.page{padding:36px 16px 64px}.card{padding:22px}.formula-grid{grid-template-columns:1fr}}