/* calculator.css — self-contained copy of the <style> block of calculator.html (source of truth, synced 01/10/2026).
   Image urls rewritten to ../ (assets/). Load after base.css. */
  :root{
    --azure:#2E8BD6; --azure-d:#1f6fb0; --ink:#20252B; --slate:#5B6672; --slate-l:#8A97A3;
    --soft:#EEF3F8; --soft2:#F6F9FC; --line:#E5ECF2; --white:#fff;
    --sky-a:#b9d0e2; --sky-b:#6f8ba1;
    --glass:rgba(255,255,255,.16); --glassborder:rgba(255,255,255,.30);
    --fd:"Poppins",system-ui,sans-serif; --fb:"Inter",system-ui,sans-serif;
    --shadow:0 30px 70px rgba(28,58,90,.16); --shadow-sm:0 16px 40px rgba(28,58,90,.10);
  }
  *{box-sizing:border-box;margin:0;padding:0}
  body{font-family:var(--fb);color:var(--slate);background:var(--white);line-height:1.6;-webkit-font-smoothing:antialiased}
  .wrap{max-width:1240px;margin:0 auto;padding:0 40px}
  h1,h2,h3,h4{font-family:var(--fd);color:var(--ink);font-weight:300;letter-spacing:-.01em;line-height:1.1}
  a{text-decoration:none;color:inherit}
  .kick{font-family:var(--fb);font-weight:600;font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--azure);display:inline-flex;align-items:center;gap:8px}
  .kick::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--azure)}
  .kick.light{color:#dceafa}.kick.light::before{background:#dceafa}
  /* ===== BUTTON SYSTEM (from home.html) ===== */
  .btn{display:inline-flex;align-items:center;gap:10px;font-family:var(--fd);font-weight:500;font-size:15px;border-radius:999px;height:52px;padding:0 8px 0 24px;cursor:pointer;border:none;box-shadow:0 10px 24px rgba(28,58,90,.12);transition:transform .2s ease-out,box-shadow .2s ease-out,background .2s ease-out}
  .btn .arw{width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:15px;flex-shrink:0;transition:transform .2s ease-out}
  .btn:hover{transform:translateY(-1px)}
  .btn:hover .arw{transform:translateX(3px)}
  .btn:active{transform:translateY(0)}
  .btn:focus-visible{outline:2px solid var(--azure);outline-offset:3px}
  .btn-primary{background:var(--azure);color:#fff}
  .btn-primary .arw{background:rgba(255,255,255,.22)}
  .btn-primary:hover{background:var(--azure-d);box-shadow:0 16px 36px rgba(46,139,214,.32)}
  .btn-secondary{background:#fff;color:var(--ink)}
  .btn-secondary .arw{background:#12171d;color:#fff}
  .btn-secondary:hover{box-shadow:0 16px 36px rgba(28,58,90,.22)}
  .btn-ghost{background:transparent;color:#fff;box-shadow:none;padding:0 4px 0 18px}
  .btn-ghost .arw{background:rgba(255,255,255,.16)}
  .btn-ghost:hover{background:rgba(255,255,255,.08);box-shadow:none}
  .btn-sm{height:44px;font-size:14px;padding:0 6px 0 20px}.btn-sm .arw{width:28px;height:28px}
  .btn-ghost-ink{color:var(--azure);box-shadow:none}
  .btn-ghost-ink .arw{background:var(--soft);color:var(--azure)}
  .btn-ghost-ink:hover{background:var(--soft)}
  @media(max-width:480px){.btn{height:48px}}
  @media(prefers-reduced-motion:reduce){
    .btn,.btn .arw{transition:none!important}
    .btn:hover,.btn:hover .arw{transform:none}
  }

  /* HEADER (same as home/catalog/protocol) */
  header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
  .nav{display:flex;align-items:center;justify-content:space-between;height:80px}
  .brand{display:flex;align-items:center;gap:11px;color:var(--ink);font-family:var(--fd);font-weight:600;font-size:19px}.brand .logo{height:54px;width:auto;display:block}@media(max-width:980px){.brand .logo{height:44px}}@media(max-width:480px){.brand .logo{height:36px}}
  
  
  .menu{display:flex;gap:30px;font-family:var(--fd);font-weight:500;font-size:15px;color:var(--ink)}
  .menu a{opacity:.82}.menu a.on{color:var(--azure)}.menu a:hover{color:var(--azure)}

  /* HERO compact (catalog-style) */
  .chero{background:linear-gradient(160deg,#1a5f96,#154e7e);color:#fff;padding:66px 0 130px;position:relative;overflow:hidden}
  .chero::after{content:"";position:absolute;right:-140px;top:-140px;width:480px;height:480px;border-radius:50%;background:radial-gradient(circle,rgba(46,139,214,.5),transparent 68%)}
  .chero .wrap{position:relative;z-index:1}
  .chero h1{color:#fff;font-size:50px;font-weight:300;margin:16px 0 16px;max-width:20ch}
  .chero p{color:#cfe0ee;font-size:17px;max-width:60ch}

  /* CALCULATOR CARD */
  .calcsec{background:var(--white);padding:0 0 90px}
  .calcwrap{position:relative;z-index:5;margin-top:-90px}
  .calc-card{background:rgba(255,255,255,.86);border:1px solid rgba(255,255,255,.6);border-radius:28px;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);box-shadow:var(--shadow);padding:46px 50px}
  .calcgrid{display:grid;grid-template-columns:.92fr 1.18fr;gap:54px;align-items:stretch}

  .field{margin-bottom:26px}
  .field:last-child{margin-bottom:0}
  .field label{display:block;font-family:var(--fb);font-weight:600;font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--slate-l);margin-bottom:10px}

  .inputgroup{display:flex;align-items:center;gap:12px}
  .inputwrap{flex:1;min-width:0;display:flex;align-items:baseline;gap:8px;border-bottom:2px solid var(--line);padding-bottom:10px;transition:border-color .15s}
  .inputwrap:focus-within{border-color:var(--azure)}
  .inputwrap input[type=number]{border:none;outline:none;font-family:var(--fd);font-weight:500;font-size:32px;color:var(--ink);width:100%;background:transparent;min-width:0}
  .inputwrap input[type=number]::-webkit-outer-spin-button,.inputwrap input[type=number]::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
  .inputwrap .unit{font-family:var(--fb);color:var(--slate-l);font-size:14px;white-space:nowrap}

  .stepbtn{flex-shrink:0;width:38px;height:38px;border-radius:50%;border:1px solid var(--line);background:var(--soft2);color:var(--azure);font-family:var(--fd);font-weight:500;font-size:18px;line-height:1;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background .15s,color .15s,border-color .15s}
  .stepbtn:hover{background:var(--azure);color:#fff;border-color:var(--azure)}
  .stepbtn:focus-visible{outline:2px solid var(--azure);outline-offset:2px}

  .presets{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}
  .presets button{font-family:var(--fd);font-weight:500;font-size:13px;color:var(--azure);background:var(--soft);border:1px solid var(--line);border-radius:999px;padding:7px 15px;cursor:pointer;transition:.15s}
  .presets button:hover,.presets button.active{background:var(--azure);color:#fff;border-color:var(--azure)}
  .presets button:focus-visible{outline:2px solid var(--azure);outline-offset:2px}

  .segmented{display:inline-flex;background:var(--soft2);border:1px solid var(--line);border-radius:999px;padding:5px;gap:4px;flex-wrap:wrap}
  .segmented button{font-family:var(--fd);font-weight:500;font-size:13.5px;color:var(--slate);background:transparent;border:none;border-radius:999px;padding:9px 16px;cursor:pointer;transition:background .15s,color .15s}
  .segmented button.active{background:var(--azure);color:#fff}
  .segmented button:focus-visible{outline:2px solid var(--azure);outline-offset:2px}

  .resetbtn{margin-top:6px}

  /* INSTRUMENT (syringe hero) */
  .outputs{display:flex;flex-direction:column;height:100%}
  .instrument{flex:1;display:flex;flex-direction:column;background:linear-gradient(135deg,#154e7e,#2E8BD6);border-radius:22px;padding:28px 18px 26px;color:#fff;text-align:center;box-shadow:var(--shadow-sm)}
  .readout{flex:1;display:flex;flex-direction:column;justify-content:center}
  .readout .v{font-family:var(--fd);font-weight:300;font-size:72px;color:#fff;line-height:1;letter-spacing:-.01em}
  .readout .v .u{font-size:15px;font-family:var(--fb);font-weight:600;color:#cfe3f4;margin-left:8px;letter-spacing:.1em;text-transform:uppercase}
  .readout .sub{font-family:var(--fb);font-size:13px;color:#bfe0f7;margin-top:6px}

  .syr-plate{flex-shrink:0;margin-top:22px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);border-radius:18px;padding:32px 24px;overflow:hidden}
  .syringe{width:100%;height:auto;display:block;overflow:hidden}
  .syringe #liquidFill{transition:x .45s ease-out,width .45s ease-out}
  .syringe #plunger{transition:transform .45s ease-out}
  .syringe .tick-label{fill:#cfe3f4;font-family:"Inter",sans-serif}

  .exceeds{font-family:var(--fb);font-size:12.5px;color:#3a2c10;background:#ffd98a;border-radius:10px;padding:10px 14px;margin-top:14px;text-align:left;display:none}
  .exceeds.show{display:block}

  .secondary{flex-shrink:0;display:grid;grid-template-columns:auto 1fr;gap:24px;margin-top:22px;align-items:center}
  .vialwrap{display:flex;flex-direction:column;align-items:center;gap:8px}
  .vial{width:70px;height:auto}
  .vial #vialLiquid{transition:y .45s ease-out,height .45s ease-out}
  .viallabel{font-family:var(--fb);font-weight:600;font-size:12px;color:var(--slate);white-space:nowrap;text-align:center}

  .results{background:var(--soft2);border-radius:20px;padding:8px 26px}
  .result-row{display:flex;align-items:center;gap:12px;padding:15px 0;border-top:1px solid var(--line)}
  .result-row:first-child{border-top:none}
  .result-row .ic{flex-shrink:0;width:20px;height:20px;color:var(--azure)}
  .result-row .l{font-family:var(--fb);font-size:14px;color:var(--slate);flex:1}
  .result-row .v{font-family:var(--fd);font-weight:500;font-size:18px;color:var(--ink);white-space:nowrap}

  @media(prefers-reduced-motion:reduce){
    .syringe #liquidFill,.syringe #plunger,.vial #vialLiquid{transition:none!important}
  }
  @media(max-width:980px){
    .outputs{order:-1;height:auto}
    .instrument{flex:none}
  }
  @media(max-width:640px){.outputs{order:0}.results{justify-self:stretch;min-width:0}}
  @media(max-width:400px){.results{padding:6px 18px}.result-row{gap:10px}.result-row .l{font-size:13px}.result-row .v{font-size:16px}}
  @media(max-width:480px){
    .readout .v{font-size:54px}
    .instrument{padding:24px 20px 22px}
    .syr-plate{padding:22px 16px}
    .secondary{grid-template-columns:1fr;justify-items:center}
  }

  /* HOW THE MATH WORKS */
  .math{padding:20px 0 90px;background:var(--white)}
  .math .head{max-width:640px;margin-bottom:34px}
  .mathsteps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
  .mstep{background:var(--soft2);border-radius:20px;padding:26px 26px 24px}
  .mstep .n{font-family:var(--fd);font-weight:600;font-size:13px;color:var(--azure);margin-bottom:12px}
  .mstep .f{font-family:var(--fd);font-weight:500;font-size:17px;color:var(--ink);margin-bottom:8px}
  .mstep .d{font-size:13.5px;color:var(--slate)}

  /* FAQ (home-style) */
  .faq{padding:20px 0 90px;background:var(--soft2)}
  .faq .head{max-width:640px;margin-bottom:34px}
  .qs{max-width:820px}
  .q{border:1px solid var(--line);border-radius:16px;padding:22px 26px;margin-bottom:14px;background:var(--white);transition:.2s}
  .q.open{border-color:#d3e0ea}
  .q .qh{display:flex;justify-content:space-between;align-items:center;cursor:pointer;font-family:var(--fd);font-weight:500;font-size:17px;color:var(--ink)}
  .q .qh .x{width:26px;height:26px;border-radius:50%;background:var(--soft);display:flex;align-items:center;justify-content:center;color:var(--azure);flex-shrink:0}
  .q .a{font-size:15px;color:var(--slate);margin-top:14px;display:none}
  .q.open .a{display:block}

  /* PREMIUM CTA (protocol-style) */
  .premiumsec{padding:20px 0 90px;background:var(--white)}

  .disc{background:var(--soft2);border-radius:16px;padding:22px 26px;font-size:13px;color:var(--slate);line-height:1.7;margin-top:36px}

  footer{background:#0f1a26;color:#93a6b8;padding:64px 0 32px}
  footer .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:44px;padding-bottom:38px;border-bottom:1px solid rgba(255,255,255,.1)}
  footer .brand{color:#fff;margin-bottom:16px}
  footer .tg{font-size:14px;color:#8598aa;max-width:32ch}
  footer h4{font-family:var(--fd);color:#fff;font-size:14px;font-weight:500;margin-bottom:18px}
  footer a{display:block;color:#93a6b8;font-size:14px;margin-bottom:10px}footer a:hover{color:#fff}
  footer .base{padding-top:24px;font-size:12.5px;color:#647a8c;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}footer .base{align-items:center}.vp-boomtube-credit{display:inline-flex;align-items:center;justify-content:flex-end;gap:8px;padding:0;margin:0;text-align:right}.vp-boomtube-credit .vp-bt-link{display:inline-flex;align-items:center;gap:8px;text-decoration:none;border:0;background:none;transition:filter .2s ease,opacity .2s ease}.vp-boomtube-credit .vp-bt-burst{width:22px;height:22px;flex:0 0 auto;display:block;transition:filter .2s ease}.vp-boomtube-credit .vp-bt-text{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;line-height:1.2;white-space:nowrap}.vp-boomtube-credit .vp-bt-pre{color:#cfe3f4;opacity:.55}.vp-boomtube-credit .vp-bt-name{color:#F2F6FA;opacity:.92;font-weight:500}@media(max-width:549px){footer .base{flex-direction:column-reverse;align-items:center;text-align:center;gap:12px}.vp-boomtube-credit{justify-content:center;text-align:center}}

  @media(max-width:980px){
    .wrap{padding:0 22px}.chero h1{font-size:36px}.menu{display:none}
    .calc-card{padding:32px 26px}
    .calcgrid{grid-template-columns:1fr;gap:36px}
    .mathsteps{grid-template-columns:1fr}
    footer .cols{grid-template-columns:1fr 1fr}
  }

  /* narrow phones: keep the calculator inside its card */
  @media(max-width:480px){
    .calc-card{padding:24px 16px}
    .calcgrid{grid-template-columns:minmax(0,1fr)}
    .calcgrid > *,.inputs,.outputs,.field,.inputgroup,.presets{min-width:0}
    .inputgroup input{min-width:0}
    .presets{flex-wrap:wrap}
    .syr-plate{padding:14px 8px}
    .syringe .tick-label{font-size:46px}
    .syringe .tick-label.alt{display:none}
  }

  /* vp-mobile-v1 */
  .navtoggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;align-items:center;justify-content:center;cursor:pointer;flex:none;padding:0}
  .navtoggle span,.navtoggle span::before,.navtoggle span::after{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px}
  .navtoggle span{position:relative}
  .navtoggle span::before,.navtoggle span::after{content:"";position:absolute;left:0;transition:transform .2s ease-out}
  .navtoggle span::before{top:-6px}.navtoggle span::after{top:6px}
  .open>.navtoggle span,.open .navtoggle span{background:transparent}
  .open .navtoggle span::before{transform:translateY(6px) rotate(45deg)}
  .open .navtoggle span::after{transform:translateY(-6px) rotate(-45deg)}
  @media(max-width:980px){
    .nav{position:relative;gap:10px}
    .nav .brand{margin-right:auto}
    .navtoggle{display:inline-flex}
    header.open .menu{display:flex;flex-direction:column;gap:0;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 24px 40px rgba(28,58,90,.12);padding:6px 22px 14px}
    header.open .menu a{padding:15px 0;border-bottom:1px solid var(--line);font-size:16px}
    header.open .menu a:last-child{border-bottom:none}
  }
  @media(max-width:480px){.nav>.btn,.nav>.pill{height:40px;padding:0 16px;font-size:13px}.nav>.btn .arw,.nav>.pill .arw{display:none}}
  .layout>*{min-width:0}
  .tbl{overflow-x:auto;-webkit-overflow-scrolling:touch}