:root{
    --bg:#f3faf5; --bg2:#e6f4ea; --card:#ffffff; --ink:#0f2a1f; --ink2:#3b5448; --muted:#5f7a6d; --line:#d8ebdf;
    --leaf:#1f9d63; --leaf2:#157a4b; --mint:#7ddcb0; --deep:#0e2b20; --deep2:#143a2b; --citrus:#ffb22e; --lime:#c6e85a; --sky:#3fa9d6;
    --sans: system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
    --round: ui-rounded,"SF Pro Rounded",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  }
  *{box-sizing:border-box} html{scroll-behavior:smooth}
  body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.6 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
  a{color:inherit}
  .wrap{max-width:1140px;margin:0 auto;padding:0 20px}
  .sr{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

  nav{position:sticky;top:0;z-index:40;background:rgba(243,250,245,.88);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
  nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
  .logo{font:800 21px/1 var(--round);letter-spacing:-.02em;text-decoration:none;display:flex;align-items:center;gap:10px}
  .logo .mk{width:32px;height:32px;border-radius:10px 22px 10px 22px;background:linear-gradient(135deg,var(--mint),var(--leaf));position:relative}
  .logo .mk::after{content:"";position:absolute;right:-3px;top:-3px;width:11px;height:11px;border-radius:50%;background:var(--citrus);border:2px solid var(--bg)}
  .logo small{font:500 12px var(--sans);color:var(--muted)}

  .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;cursor:pointer;text-decoration:none;
    font:700 16px/1 var(--sans);padding:16px 24px;border-radius:14px;background:var(--leaf);color:#fff;
    box-shadow:0 10px 24px -12px rgba(21,122,75,.8);transition:transform .15s,box-shadow .15s,background .2s}
  .btn:hover{background:var(--leaf2);transform:translateY(-1px)}
  .btn:active{transform:translateY(1px)}
  .btn:focus-visible,input:focus-visible,summary:focus-visible,a:focus-visible,.reset:focus-visible{outline:3px solid var(--citrus);outline-offset:3px}
  .btn.sm{padding:11px 16px;font-size:14px}

  /* hero */
  .hero{padding:60px 0 76px;position:relative;overflow:hidden}
  .hero::before{content:"";position:absolute;right:-180px;top:-180px;width:560px;height:560px;border-radius:50%;background:radial-gradient(circle,rgba(125,220,176,.45),transparent 65%);pointer-events:none}
  .hero::after{content:"";position:absolute;left:-120px;bottom:-200px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(255,178,46,.18),transparent 65%);pointer-events:none}
  .hero .grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;position:relative;z-index:1}
  .tag{display:inline-flex;gap:8px;align-items:center;font:700 13px var(--sans);color:var(--leaf2);background:rgba(31,157,99,.1);padding:7px 14px;border-radius:999px}
  .tag i{width:8px;height:8px;border-radius:50%;background:var(--leaf)}
  h1{font:800 clamp(40px,6vw,76px)/1 var(--sans);letter-spacing:-.04em;margin:20px 0 20px}
  h1 .q{color:var(--leaf)}
  .lede{font-size:clamp(18px,2vw,21px);color:var(--ink2);max-width:540px;margin:0 0 28px}
  .signup{display:flex;gap:10px;max-width:520px;flex-wrap:wrap}
  .signup input{flex:1 1 230px;min-width:0;background:var(--card);border:2px solid var(--line);color:var(--ink);font:16px var(--sans);padding:14px 16px;border-radius:14px}
  .signup input:focus{border-color:var(--leaf)}
  .micro{font-size:14px;color:var(--ink2);margin-top:14px;display:flex;gap:18px;flex-wrap:wrap}
  .micro span::before{content:"✓ ";color:var(--leaf);font-weight:800}

  /* calculator demo */
  .today{background:var(--card);border-radius:26px;border:1px solid var(--line);box-shadow:0 30px 70px -32px rgba(15,42,31,.45);overflow:hidden}
  .th{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:16px 20px;border-bottom:1px solid var(--line)}
  .th b{font:800 18px var(--round)}
  .th .d{font-size:13px;color:var(--muted);display:block}
  .demo-lbl{font:700 11px var(--sans);letter-spacing:.1em;text-transform:uppercase;color:#8a5a00;background:#fff1d1;padding:5px 10px;border-radius:999px;white-space:nowrap}
  .calc{padding:14px 18px 6px;display:grid;grid-template-columns:1fr 1fr;gap:10px 12px}
  .calc .full{grid-column:1/-1}
  .fld{min-width:0}
  .fld>label,.fld>.lb{display:block;font:700 12px var(--sans);letter-spacing:.04em;text-transform:uppercase;color:var(--muted);margin-bottom:4px}
  .fld input,.fld select{width:100%;min-width:0;border:1.5px solid var(--line);background:var(--bg);border-radius:11px;padding:9px 10px;font:600 16px var(--sans);color:var(--ink);font-variant-numeric:tabular-nums}
  .fld input:focus,.fld select:focus{border-color:var(--leaf);outline:none;background:#fff}
  .fld select:focus-visible{outline:3px solid var(--citrus);outline-offset:2px}
  .unitin{position:relative}
  .unitin input{padding-right:34px}
  .unitin em{position:absolute;right:10px;top:50%;transform:translateY(-50%);font:600 13px var(--sans);font-style:normal;color:var(--muted);pointer-events:none}
  .pair{display:flex;gap:6px}.pair .unitin{flex:1;min-width:0}
  .seg{display:flex;background:var(--bg2);border-radius:11px;padding:3px;gap:3px}
  .seg button{flex:1;border:0;background:none;border-radius:8px;padding:8px 6px;font:700 13.5px var(--sans);color:var(--ink2);cursor:pointer;white-space:nowrap}
  .seg button[aria-pressed="true"]{background:#fff;color:var(--leaf2);box-shadow:0 1px 4px rgba(15,42,31,.15)}
  .seg button:focus-visible{outline:3px solid var(--citrus);outline-offset:1px}
  .unitsw{width:auto;flex:none}
  .res{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:10px 18px 4px}
  .tile{border:1px solid var(--line);border-radius:16px;padding:12px 14px;background:linear-gradient(180deg,#fff,var(--bg));min-width:0}
  .tile .k{font:700 12px var(--sans);letter-spacing:.05em;text-transform:uppercase;color:var(--muted);display:flex;gap:6px;align-items:center}
  .tile .big{font:800 26px/1.1 var(--round);font-variant-numeric:tabular-nums;margin:4px 0 2px;color:var(--ink)}
  .tile .big small{font:600 13px var(--sans);color:var(--muted);margin-left:3px}
  .tile .s{font-size:12.5px;line-height:1.35;color:var(--ink2)}
  .tile.bmi{grid-column:1/-1}
  .bmihead{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
  .cat{font:700 12px var(--sans);padding:3px 9px;border-radius:999px;background:var(--bg2);color:var(--leaf2)}
  .cat.u{background:#e1f2fb;color:#1c6c8f}.cat.o{background:#fff1d1;color:#8a5a00}.cat.a{background:#fde4dc;color:#9a3a1c}
  .gauge{position:relative;height:10px;border-radius:999px;margin:10px 0 4px;background:linear-gradient(90deg,#8fd0ec 0 14%,#7ddcb0 14% 40%,#ffd27a 40% 60%,#f6a58a 60% 100%)}
  .gauge i{position:absolute;top:50%;width:16px;height:16px;border-radius:50%;background:#fff;border:3px solid var(--ink);transform:translate(-50%,-50%);transition:left .5s cubic-bezier(.2,.8,.2,1)}
  .gl{position:relative;height:14px;font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums}
  .gl span{position:absolute;top:0;transform:translateX(-50%)}.gl span:first-child{transform:none}.gl span:last-child{transform:translateX(-100%)}
  .tf{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:10px 18px 16px;font-size:12.5px;color:var(--muted)}
  .reset{border:0;background:none;color:var(--leaf2);font:700 13px var(--sans);cursor:pointer;text-decoration:underline;padding:4px;flex:none}
  .err{color:#9a3a1c}

  section{padding:92px 0}
  .kicker{font:800 12px var(--sans);letter-spacing:.16em;text-transform:uppercase;color:var(--leaf2);margin-bottom:12px}
  h2{font:800 clamp(32px,4.4vw,52px)/1.05 var(--sans);letter-spacing:-.03em;margin:0 0 16px}
  h2 em{font-style:normal;color:var(--leaf)}
  .sub{color:var(--ink2);font-size:19px;max-width:660px;margin:0}
  .center{text-align:center}.center .sub{margin:0 auto}

  .for{padding:24px 0 28px;border-block:1px solid var(--line);background:var(--card)}
  .for .wrap{display:flex;align-items:center;gap:12px;flex-wrap:wrap;justify-content:center}
  .for b{font:800 13px var(--sans);letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-right:6px}
  .chip{background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:8px 16px;font:600 15px var(--sans);color:var(--ink2)}

  /* problem */
  .prob{background:var(--deep);color:#e8f5ee}
  .prob .grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
  .prob h2{color:#fff} .prob h2 em{color:var(--mint)}
  .prob .sub{color:#b9d6c7}
  .prob .kicker{color:var(--citrus)}
  .xlist{list-style:none;padding:0;margin:22px 0 0}
  .xlist li{padding:8px 0 8px 34px;position:relative;color:#cfe5d9}
  .xlist li::before{content:"✗";position:absolute;left:0;top:9px;width:22px;height:22px;border-radius:50%;background:rgba(255,178,46,.18);color:var(--citrus);font:800 12px/22px var(--sans);text-align:center}
  .vs{display:grid;gap:14px}
  .vc{border-radius:20px;padding:22px 24px}
  .vc h3{margin:0 0 10px;font:800 17px var(--sans);letter-spacing:.02em}
  .vc ul{margin:0;padding:0;list-style:none;font-size:15.5px}
  .vc li{padding:5px 0 5px 26px;position:relative}
  .vc.them{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);color:#b9d6c7}
  .vc.them li::before{content:"—";position:absolute;left:0;color:#7e9a8c}
  .vc.us{background:var(--card);color:var(--ink)}
  .vc.us h3{color:var(--leaf2)}
  .vc.us li::before{content:"✓";position:absolute;left:0;color:var(--leaf);font-weight:800}

  /* features */
  .feats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:48px}
  .fc{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:28px}
  .fc .ic{width:50px;height:50px;border-radius:15px;display:grid;place-items:center;font-size:24px;margin-bottom:16px;background:var(--bg2)}
  .fc:nth-child(2) .ic{background:#e1f2fb}.fc:nth-child(3) .ic{background:#fff3d6}.fc:nth-child(5) .ic{background:#f1f8d8}
  .fc h3{margin:0 0 8px;font:800 20px/1.2 var(--sans);letter-spacing:-.01em}
  .fc p{margin:0;color:var(--ink2);font-size:16px}

  /* today tracker demo */
  .tdemo{margin:40px auto 0;max-width:860px;background:var(--card);border:1px solid var(--line);border-radius:26px;box-shadow:0 30px 70px -32px rgba(15,42,31,.35);display:grid;grid-template-columns:auto 1fr;gap:28px;padding:26px}
  .tdemo__rings{display:flex;flex-direction:column;gap:16px;align-items:center;justify-content:center}
  .tring{--p:0;display:flex;flex-direction:column;align-items:center;gap:6px}
  .tring>div{position:relative;width:92px;height:92px;border-radius:50%;display:grid;place-content:center;justify-items:center;background:conic-gradient(var(--c) calc(var(--p)*1%),var(--bg2) 0);transition:background .4s}
  .tring>div::before{content:"";position:absolute;inset:8px;border-radius:50%;background:var(--card)}
  .tring b,.tring small{position:relative;line-height:1}
  .tring b{font:800 26px var(--round)} .tring small{font:700 12px var(--sans);color:var(--muted)}
  .tring span{font:800 12px var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
  .tdemo__lbl{font:700 12px var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:14px 0 8px}
  .tdemo__lbl:first-child{margin-top:0}
  .glasses{display:flex;flex-wrap:wrap;gap:8px}
  .glasses button{width:44px;height:52px;border:2px dashed rgba(63,169,214,.55);border-radius:9px 9px 16px 16px;background:none;cursor:pointer;font-size:20px;color:rgba(63,169,214,.55);transition:all .2s}
  .glasses button.on{border-style:solid;border-color:var(--sky);background:linear-gradient(to top,var(--sky),#8fd3f0);color:#fff}
  .thabits{display:flex;flex-direction:column;gap:8px}
  .th-row{display:flex;align-items:center;gap:12px;width:100%;text-align:left;border:0;border-radius:14px;padding:10px 14px;background:var(--bg);font:600 15.5px var(--sans);color:var(--ink);cursor:pointer;transition:background .2s}
  .th-row i{flex:none;width:28px;height:28px;border-radius:50%;border:2px solid var(--mint);display:grid;place-items:center;font-style:normal;font-weight:800;color:transparent;transition:all .2s}
  .th-row em{margin-left:auto;font-style:normal;font-size:13px;color:var(--muted);white-space:nowrap}
  .th-row.on{background:var(--bg2)} .th-row.on i{background:var(--leaf);border-color:var(--leaf);color:#fff}
  .tmove{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
  .tmove button{border:0;border-radius:999px;padding:9px 16px;background:var(--bg2);font:700 14px var(--sans);color:var(--ink);cursor:pointer}
  .tmove button:hover{background:#d4ecdc}
  .tmove span{font-size:13px;color:var(--muted)}
  @media (max-width:640px){.tdemo{grid-template-columns:1fr;padding:18px}.tdemo__rings{flex-direction:row;justify-content:space-around}.tring>div{width:76px;height:76px}}

  .how{background:var(--bg2)}
  .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:52px}
  .st{background:var(--card);border-radius:22px;padding:28px;border:1px solid var(--line)}
  .st .n{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;font:800 19px var(--round);color:#fff;background:var(--leaf);margin-bottom:16px}
  .st:nth-child(2) .n{background:var(--sky)}.st:nth-child(3) .n{background:var(--citrus);color:var(--ink)}
  .st h3{margin:0 0 6px;font:800 20px var(--sans)}
  .st p{margin:0;color:var(--ink2);font-size:16px}

  .promise{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:40px}
  .pc{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:22px;border-top:4px solid var(--leaf)}
  .pc:nth-child(2){border-top-color:var(--sky)}.pc:nth-child(3){border-top-color:var(--citrus)}.pc:nth-child(4){border-top-color:var(--lime)}
  .pc b{display:block;font-size:17px;margin-bottom:4px}
  .pc span{color:var(--muted);font-size:15px}

  .disc{margin:44px auto 0;max-width:860px;background:#fffaf0;border:1.5px solid #f3dca6;border-radius:18px;padding:20px 22px;display:flex;gap:14px;align-items:flex-start;font-size:15.5px;color:#4a3b17}
  .disc b.i{flex:none;width:28px;height:28px;border-radius:50%;background:var(--citrus);color:var(--ink);display:grid;place-items:center;font:800 15px var(--sans)}
  .disc p{margin:0}

  .faq{max-width:780px;margin:44px auto 0}
  details{border-bottom:2px solid var(--line);padding:20px 0}
  summary{cursor:pointer;list-style:none;font:700 19px var(--sans);display:flex;justify-content:space-between;gap:16px}
  summary::-webkit-details-marker{display:none}
  summary::after{content:"+";font:800 24px/1 var(--sans);color:var(--leaf);transition:transform .2s;flex:none}
  details[open] summary::after{transform:rotate(45deg)}
  details p{color:var(--ink2);margin:12px 0 0}

  .final{text-align:center;background:radial-gradient(circle at 80% 0%,rgba(125,220,176,.35),transparent 50%),linear-gradient(160deg,var(--deep2),var(--deep));color:#fff;border-radius:32px;margin:0 20px 40px;padding:96px 20px;position:relative;overflow:hidden}
  .final h2{color:#fff;font-size:clamp(38px,5.8vw,70px)}
  .final h2 em{color:var(--mint)}
  .final .sub{color:#cfe5d9;margin:0 auto}
  .final .signup{margin:32px auto 0;justify-content:center}
  .final .signup input{border-color:transparent}
  .final .btn{background:var(--citrus);color:var(--ink);box-shadow:0 10px 24px -12px rgba(255,178,46,.8)}
  .final .btn:hover{background:#ffc04f}
  .final .micro{justify-content:center;color:#cfe5d9}
  .final .micro span::before{color:var(--mint)}
  .final .kicker{color:var(--citrus)}

  footer{padding:24px 0 100px;color:var(--muted);font-size:14px}
  footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
  footer a{text-decoration:none;margin-left:18px} footer a:hover{color:var(--ink)}
  footer .fine{flex-basis:100%;font-size:13px;margin:0}

  .mcta{position:fixed;left:12px;right:12px;bottom:12px;z-index:45;display:none;transform:translateY(140%);transition:transform .3s}
  .mcta.show{transform:none} .mcta .btn{width:100%;padding:17px}

  .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s,transform .6s}
  .reveal.on{opacity:1;transform:none}

  @media (max-width:960px){
    .hero .grid,.prob .grid{grid-template-columns:1fr}
    .today{max-width:520px;margin:0 auto;width:100%}
    .feats,.promise{grid-template-columns:1fr 1fr}
    .steps{grid-template-columns:1fr}
    section{padding:64px 0}
    .mcta{display:block}
    nav .btn{display:none}
    .final{margin:0 12px 30px;padding:70px 18px;border-radius:24px}
  }
  @media (max-width:560px){
    .feats,.promise{grid-template-columns:1fr} .signup .btn{width:100%}
    .calc{padding:12px 12px 4px;gap:10px 8px} .res{padding:8px 12px 4px;gap:8px} .tf{padding:10px 12px 14px}
    .tile{padding:10px 11px} .tile .big{font-size:22px} .th{padding:14px 14px}
    .disc{padding:18px}
  }
  @media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}}