/* BP & Sugar Tracker — base tokens & shared components
   No external fonts, no CDN. System stacks only. */

:root{
  /* Palette — clinical navy, instrument-panel accents */
  --ink:#0B1B33;          /* deep navy — primary text & panels */
  --ink-2:#16294a;
  --slate:#5A6B85;        /* secondary text */
  --mist:#F4F6F9;         /* page wash */
  --paper:#FFFFFF;
  --line:#DDE3EC;
  --line-soft:#EDF1F6;

  /* Data channels — each measurement owns one hue, everywhere */
  --bp:#1F5FD6;
  --glucose:#6D4AD1;
  --pulse:#0E8C8C;
  --weight:#3F5A80;
  --spo2:#0F7FA8;

  /* Status — never used alone; always paired with a word */
  --ok:#1E8E5A;
  --watch:#B4720A;
  --high:#C2382E;

  --radius:14px;
  --radius-sm:9px;
  --shadow:0 1px 2px rgba(11,27,51,.06), 0 8px 24px rgba(11,27,51,.06);
  --shadow-lg:0 2px 6px rgba(11,27,51,.08), 0 24px 60px rgba(11,27,51,.12);

  --font-display:Georgia,"Iowan Old Style","Times New Roman",serif;
  --font-ui:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --font-num:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;

  --wrap:1120px;
  --gap:clamp(18px,4vw,32px);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font:400 16px/1.65 var(--font-ui);
  -webkit-font-smoothing:antialiased;
}
img,svg{max-width:100%;display:block}
a{color:var(--bp);text-underline-offset:3px}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:400;letter-spacing:-.01em;line-height:1.18;margin:0}
h1{font-size:clamp(2rem,5.2vw,3.4rem)}
h2{font-size:clamp(1.5rem,3.4vw,2.25rem)}
h3{font-size:1.18rem}
p{margin:0 0 1rem}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.eyebrow{
  font:600 12px/1 var(--font-ui);letter-spacing:.14em;text-transform:uppercase;
  color:var(--slate);margin:0 0 14px;display:block;
}
.lede{font-size:1.075rem;color:var(--slate);max-width:62ch}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

:focus-visible{outline:2px solid var(--bp);outline-offset:3px;border-radius:4px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 20px;border-radius:999px;border:1px solid transparent;
  font:600 15px/1 var(--font-ui);cursor:pointer;text-decoration:none;
  transition:background .15s ease,border-color .15s ease,color .15s ease,transform .1s ease;
}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--ink);color:#fff}
.btn--primary:hover{background:var(--ink-2)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--ink);background:var(--mist)}
.btn--wide{width:100%}
.btn--sm{min-height:38px;padding:0 14px;font-size:14px}

/* ---------- Forms ---------- */
.field{margin:0 0 16px}
.field > label{display:block;font:600 13px/1.4 var(--font-ui);margin:0 0 6px;color:var(--ink)}
.field .hint{display:block;font-size:12.5px;color:var(--slate);margin-top:6px}
.input,select.input,textarea.input{
  width:100%;min-height:46px;padding:11px 13px;background:var(--paper);
  border:1px solid var(--line);border-radius:var(--radius-sm);
  font:400 16px/1.4 var(--font-ui);color:var(--ink);
}
.input:focus{border-color:var(--bp);outline:none;box-shadow:0 0 0 3px rgba(31,95,214,.14)}
.input[aria-invalid="true"]{border-color:var(--high)}
.field-error{color:var(--high);font-size:13px;margin-top:6px;display:none}
.field-error[data-show="1"]{display:block}
.row-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}

/* ---------- Site header ---------- */
.site-head{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line-soft)}
.site-head__in{display:flex;align-items:center;gap:16px;min-height:66px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:600;font-size:15.5px;letter-spacing:-.01em}
.brand__mark{width:30px;height:30px;flex:none}
.site-nav{margin-left:auto;display:none;gap:26px}
.site-nav a{color:var(--slate);text-decoration:none;font-size:14.5px;font-weight:500}
.site-nav a:hover,.site-nav a[aria-current="page"]{color:var(--ink)}
.head-cta{display:none;gap:10px;margin-left:22px}
.nav-toggle{margin-left:auto;background:none;border:1px solid var(--line);border-radius:9px;width:42px;height:38px;display:grid;place-items:center;cursor:pointer}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{display:block;width:17px;height:1.6px;background:var(--ink);content:"";position:relative}
.nav-toggle span::before{position:absolute;top:-5px}
.nav-toggle span::after{position:absolute;top:5px}
.mobile-nav{display:none;border-top:1px solid var(--line-soft);padding:12px 0 18px}
.mobile-nav[data-open="1"]{display:block}
.mobile-nav a{display:block;padding:11px 0;color:var(--ink);text-decoration:none;border-bottom:1px solid var(--line-soft);font-size:15px}
.mobile-nav .btn{margin-top:14px}
@media(min-width:900px){
  .site-nav,.head-cta{display:flex}
  .nav-toggle{display:none}
  .mobile-nav{display:none !important}
}

/* ---------- Footer ---------- */
.site-foot{background:var(--ink);color:#AFBDD2;margin-top:88px;padding:56px 0 32px;font-size:14.5px}
.site-foot a{color:#DCE5F2;text-decoration:none}
.site-foot a:hover{text-decoration:underline}
.foot-grid{display:grid;gap:32px;grid-template-columns:1fr}
.foot-grid h4{font-family:var(--font-ui);font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:#7C90AE;margin:0 0 14px}
.foot-grid ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.foot-brand p{max-width:34ch;color:#8FA1BC}
.foot-note{margin-top:40px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;color:#7C90AE;font-size:13px}
@media(min-width:760px){.foot-grid{grid-template-columns:1.6fr 1fr 1fr 1fr}}

/* ---------- Disclaimer bar ---------- */
.medbar{background:#FFF8E8;border:1px solid #F0DFB4;border-radius:var(--radius-sm);padding:12px 14px;color:#6B5312;font-size:13.5px;display:flex;gap:10px;align-items:flex-start}
.medbar strong{color:#5A4409}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
}