*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--indigo:#4f46e5;--indigo-d:#4338ca;--indigo-l:#eef2ff;--purple:#7c3aed;--text:#111827;--muted:#6b7280;--border:#e5e7eb;--bg:#f9fafb;--white:#fff;--radius:14px;--shadow:0 4px 24px rgba(0,0,0,.07);--shadow-lg:0 8px 40px rgba(0,0,0,.12)}
html{scroll-behavior:smooth}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;color:var(--text);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:'DM Serif Display',Georgia,serif;line-height:1.2}
a{color:inherit;text-decoration:none}
input,select{font-family:'Inter',sans-serif;font-size:15px;width:100%;padding:11px 14px;border:1.5px solid var(--border);border-radius:8px;background:var(--white);color:var(--text);transition:border-color .2s,box-shadow .2s;outline:none;appearance:none}
input:focus,select:focus{border-color:var(--indigo);box-shadow:0 0 0 3px rgba(79,70,229,.1)}
button{cursor:pointer;font-family:'Inter',sans-serif;transition:all .2s}
.btn-primary{background:linear-gradient(135deg,var(--indigo),var(--purple));color:#fff;border:none;border-radius:10px;padding:13px 28px;font-size:15px;font-weight:600;box-shadow:0 2px 12px rgba(79,70,229,.35);width:100%;margin-top:4px}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 20px rgba(79,70,229,.45)}
.hidden{display:none!important}

/* NAV */
.nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav-inner{max-width:1100px;margin:0 auto;padding:0 20px;height:60px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo{font-family:'Inter',sans-serif;font-size:20px;font-weight:600;letter-spacing:-.5px;color:var(--text)}
.logo strong{color:var(--indigo)}
.nav-links{display:flex;gap:4px}
.nav-link{background:none;border:none;padding:7px 14px;border-radius:8px;font-size:14px;font-weight:500;color:var(--muted)}
.nav-link:hover,.nav-link.active{background:var(--indigo-l);color:var(--indigo)}

/* HERO */
.hero{background:linear-gradient(135deg,#4f46e5 0%,#7c3aed 60%,#4f46e5 100%);padding:64px 20px 72px;text-align:center;color:#fff;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at 30% 50%,rgba(255,255,255,.06) 0%,transparent 60%)}
.hero-inner{position:relative;max-width:680px;margin:0 auto}
.hero-badge{display:inline-block;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.25);border-radius:50px;padding:5px 16px;font-size:13px;font-weight:500;margin-bottom:20px;letter-spacing:.3px}
.hero h1{font-size:clamp(2rem,5vw,3.2rem);color:#fff;margin-bottom:16px}
.hero h1 em{font-style:italic;opacity:.9}
.hero-sub{font-size:17px;opacity:.85;margin-bottom:36px;line-height:1.6;max-width:540px;margin-left:auto;margin-right:auto}
.hero-stats{display:flex;justify-content:center;gap:40px;flex-wrap:wrap}
.stat{text-align:center}
.sv{display:block;font-size:2rem;font-weight:700;line-height:1}
.sl{display:block;font-size:13px;opacity:.75;margin-top:4px}

/* TABS */
.calcs-section{max-width:800px;margin:0 auto;padding:0 16px 60px}
.tabs-bar{display:flex;gap:8px;padding:20px 0 8px;overflow-x:auto;scrollbar-width:none}
.tabs-bar::-webkit-scrollbar{display:none}
.tab{background:#fff;border:1.5px solid var(--border);border-radius:10px;padding:10px 18px;font-size:14px;font-weight:500;color:var(--muted);white-space:nowrap;flex-shrink:0;display:flex;align-items:center;gap:6px}
.tab:hover{border-color:var(--indigo);color:var(--indigo)}
.tab.active{border-color:var(--indigo);background:var(--indigo-l);color:var(--indigo);font-weight:600}

/* CALC CARD */
.calc-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;margin-top:8px}
.calc-header{padding:24px 28px;display:flex;align-items:center;gap:16px;color:#fff}
.bmr-h{background:linear-gradient(135deg,#4f46e5,#7c3aed)}
.bmi-h{background:linear-gradient(135deg,#0ea5e9,#4f46e5)}
.wl-h{background:linear-gradient(135deg,#10b981,#4f46e5)}
.macro-h{background:linear-gradient(135deg,#f59e0b,#ef4444)}
.cicon{font-size:2.2rem}
.calc-header h2{font-size:1.5rem;color:#fff;margin-bottom:2px}
.calc-header p{font-size:13px;opacity:.85}
.calc-body{padding:28px}

/* FORM */
.toggle-row,.gender-row{display:flex;gap:8px;margin-bottom:20px}
.tog,.gen{flex:1;padding:9px 16px;border:1.5px solid var(--border);border-radius:8px;background:var(--bg);font-size:14px;font-weight:500;color:var(--muted)}
.tog.active,.gen.active{border-color:var(--indigo);background:var(--indigo-l);color:var(--indigo)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:20px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
.field label,.field-label{font-size:12px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.4px}
select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:36px;cursor:pointer}
.goal-group{margin-bottom:20px}
.goal-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-top:8px}
.goal-btn{padding:12px;border:1.5px solid var(--border);border-radius:10px;background:var(--bg);text-align:left;display:flex;flex-direction:column;gap:3px}
.goal-btn strong{font-size:14px;color:var(--text)}
.goal-btn span{font-size:12px;color:var(--muted)}
.goal-btn.active{border-color:var(--indigo);background:var(--indigo-l)}
.goal-btn.active strong{color:var(--indigo)}

/* RESULTS */
.results{margin-top:24px;border-top:1px solid var(--border);padding-top:20px;animation:fadeIn .35s ease}
.rrow{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid #f3f4f6;font-size:15px}
.rrow span{color:var(--muted)}
.rrow strong{font-size:18px;color:var(--text)}
.rrow strong small{font-size:12px;color:var(--muted);font-weight:400;margin-left:2px}
.rrow.hi strong{color:var(--indigo)}
.rrow.big strong{font-size:22px;color:var(--indigo)}
.rnote{font-size:13px;color:var(--muted);margin-top:14px;line-height:1.6;background:#f9fafb;padding:12px;border-radius:8px}
.rnote.warn{background:#fff7ed;color:#92400e}

/* BMI specific */
.bmi-score{display:flex;align-items:center;gap:14px;padding:12px 0}
.bmi-num{font-size:3rem;font-weight:700;font-family:'DM Serif Display',serif;line-height:1}
.bmi-badge{padding:5px 14px;border-radius:50px;color:#fff;font-size:14px;font-weight:600}
.gauge{margin:16px 0}
.gauge-bar{height:10px;background:linear-gradient(to right,#3b82f6,#10b981,#f59e0b,#ef4444);border-radius:5px;position:relative}
.gauge-marker{position:absolute;top:-4px;width:18px;height:18px;background:#fff;border:3px solid #374151;border-radius:50%;transform:translateX(-50%)}
.gauge-labels{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin-top:6px}
.bmi-table{margin-top:16px;display:flex;flex-direction:column;gap:6px}
.bmi-row{display:flex;align-items:center;gap:10px;font-size:14px;padding:6px 10px;border-radius:6px}
.bmi-row.cur{background:var(--indigo-l);font-weight:600}
.bmi-range{margin-left:auto;color:var(--muted);font-size:13px}

/* WL projections */
.wl-proj{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}
.proj{background:var(--indigo-l);border-radius:10px;padding:14px;text-align:center}
.proj span{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}
.proj strong{font-size:20px;color:var(--indigo)}

/* MACRO bars */
.macro-bars{margin-top:16px;display:flex;flex-direction:column;gap:14px}
.mbar-label{display:flex;justify-content:space-between;font-size:14px;margin-bottom:6px}
.mbar-label span:first-child{font-weight:500}
.mbar-label span:last-child{color:var(--muted);font-weight:600}
.mbar-track{height:10px;background:#f3f4f6;border-radius:5px;overflow:hidden}
.mbar-fill{height:100%;border-radius:5px;transition:width .5s ease}

/* EXPLAINER */
.explainer{border-top:1px solid var(--border);padding:28px;background:#fafafa}
.explainer h3{font-size:15px;font-weight:700;margin-bottom:8px;margin-top:16px;color:var(--text);font-family:'Inter',sans-serif}
.explainer h3:first-child{margin-top:0}
.explainer p{font-size:14px;color:var(--muted);line-height:1.7}

/* WHY */
.why-section{background:#fff;padding:70px 20px;border-top:1px solid var(--border)}
.why-inner{max-width:1000px;margin:0 auto}
.why-inner h2{font-size:2rem;text-align:center;margin-bottom:40px}
.why-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:24px}
.why-card{padding:24px;border:1.5px solid var(--border);border-radius:var(--radius);transition:all .2s}
.why-card:hover{border-color:var(--indigo);box-shadow:var(--shadow);transform:translateY(-2px)}
.wicon{font-size:2rem;display:block;margin-bottom:12px}
.why-card h3{font-size:15px;font-weight:700;margin-bottom:8px;font-family:'Inter',sans-serif}
.why-card p{font-size:14px;color:var(--muted);line-height:1.6}

/* BLOG SECTION */
.blog-section{padding:70px 20px;background:var(--bg);border-top:1px solid var(--border)}
.blog-inner{max-width:1000px;margin:0 auto}
.blog-inner h2{font-size:2rem;text-align:center;margin-bottom:10px}
.blog-sub{text-align:center;color:var(--muted);margin-bottom:40px;font-size:16px}
.blog-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px}
.blog-card{background:#fff;border:1.5px solid var(--border);border-radius:var(--radius);padding:24px;transition:all .2s;display:flex;flex-direction:column;gap:10px}
.blog-card:hover{border-color:var(--indigo);box-shadow:var(--shadow);transform:translateY(-2px)}
.blog-tag{display:inline-block;background:var(--indigo-l);color:var(--indigo);font-size:11px;font-weight:700;padding:3px 10px;border-radius:50px;letter-spacing:.5px;text-transform:uppercase;width:fit-content}
.blog-card h3{font-size:16px;font-family:'Inter',sans-serif;font-weight:700;line-height:1.4;color:var(--text)}
.blog-card p{font-size:14px;color:var(--muted);line-height:1.6;flex:1}
.read-more{font-size:13px;font-weight:600;color:var(--indigo)}

/* FOOTER */
.footer{background:#111827;color:#9ca3af;padding:40px 20px}
.footer-inner{max-width:800px;margin:0 auto;text-align:center}
.footer-logo{font-size:20px;font-weight:600;color:#fff;margin-bottom:16px;font-family:'Inter',sans-serif}
.footer-logo strong{color:#a5b4fc}
.footer-note{font-size:12px;line-height:1.7;max-width:600px;margin:0 auto 16px}
.footer-links{display:flex;justify-content:center;gap:24px;margin-bottom:14px}
.footer-links a{font-size:13px;color:#9ca3af}
.footer-links a:hover{color:#fff}
.footer-copy{font-size:12px;opacity:.6}

/* BLOG POST PAGE */
.post-hero{background:linear-gradient(135deg,#4f46e5,#7c3aed);padding:48px 20px;color:#fff;text-align:center}
.post-hero .post-tag{display:inline-block;background:rgba(255,255,255,.2);border:1px solid rgba(255,255,255,.3);border-radius:50px;padding:4px 14px;font-size:12px;font-weight:600;letter-spacing:.5px;text-transform:uppercase;margin-bottom:16px}
.post-hero h1{font-size:clamp(1.6rem,4vw,2.4rem);color:#fff;max-width:700px;margin:0 auto 14px}
.post-meta{font-size:13px;opacity:.75}
.post-body{max-width:720px;margin:0 auto;padding:48px 20px 80px}
.post-body h2{font-size:1.6rem;margin:40px 0 14px;color:var(--text)}
.post-body h3{font-size:1.15rem;font-weight:700;margin:28px 0 10px;color:var(--text);font-family:'Inter',sans-serif}
.post-body p{font-size:16px;line-height:1.8;color:#374151;margin-bottom:18px}
.post-body ul,.post-body ol{padding-left:22px;margin-bottom:18px}
.post-body li{font-size:16px;line-height:1.8;color:#374151;margin-bottom:8px}
.post-body strong{color:var(--text)}
.post-body a{color:var(--indigo);text-decoration:underline}
.post-cta{background:var(--indigo-l);border:1.5px solid #c7d2fe;border-radius:var(--radius);padding:28px;margin:40px 0;text-align:center}
.post-cta h3{font-size:1.2rem;margin-bottom:8px;font-family:'Inter',sans-serif;font-weight:700}
.post-cta p{font-size:14px;color:var(--muted);margin-bottom:16px}
.post-cta a{display:inline-block;background:linear-gradient(135deg,var(--indigo),var(--purple));color:#fff;padding:12px 28px;border-radius:10px;font-weight:600;font-size:15px;text-decoration:none}
.data-box{background:#f8faff;border-left:3px solid var(--indigo);padding:16px 20px;border-radius:0 8px 8px 0;margin:20px 0}
.data-box p{margin:0;font-size:15px}

/* ANIMATION */
@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}

/* MOBILE */
@media(max-width:600px){
  .nav-links{display:none}
  .hero{padding:40px 16px 50px}
  .hero-stats{gap:24px}
  .form-grid{grid-template-columns:1fr}
  .calc-header{padding:20px}
  .calc-body,.explainer{padding:20px}
  .goal-grid{grid-template-columns:1fr 1fr}
  .tabs-bar{padding:12px 0 4px}
  .tab{padding:8px 12px;font-size:13px}
  .wl-proj{grid-template-columns:1fr 1fr}
}

/* POST ALSO LINKS */
.post-also{margin-top:32px;padding:16px;background:var(--bg);border-radius:8px;font-size:14px;color:var(--muted)}
.post-also a{color:var(--indigo);text-decoration:underline}

/* BLOG GRID 4-UP ON WIDE */
@media(min-width:800px){
  .blog-grid{grid-template-columns:repeat(4,1fr)}
}