/* WellTest Global — design system
   Paper cream + forest green + editorial typography. Sibling of ISG, instrument-minded.
   Placeholder aesthetic — swap when brand specialist delivers. */

:root {
  /* Palette */
  --paper: #faf8f1;
  --paper-2: #f2efe5;
  --paper-3: #ebe6d7;
  --ink: #17170f;
  --ink-2: #3d3d2f;
  --muted: #6c6c5d;
  --dim: #9d9d8d;
  --rule: #dbd6c7;
  --accent: #1a4d2e;
  --accent-dark: #0f3720;
  --accent-light: #2a7a47;
  --accent-wash: #e9f0e9;
  --mark: #c47b3a;       /* test-strip orange — measurement accent */
  --mark-wash: #f5e8d8;

  /* Typography */
  --serif: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --sans: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Layout */
  --measure: 72ch;
  --gutter: clamp(16px, 4vw, 32px);
  --header-h: 70px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ── Typography ──────────────────────────────────── */
h1, h2, h3, h4, h5 {
  font-family: var(--serif);
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.01em;
  line-height: 1.1;
}
h1 { font-size: clamp(42px, 6vw, 72px); font-weight: 300; line-height: 0.98; letter-spacing: -0.02em; }
h2 { font-size: clamp(32px, 4.5vw, 48px); font-weight: 400; margin-bottom: 16px; }
h3 { font-size: clamp(22px, 2.8vw, 28px); font-weight: 500; margin-bottom: 12px; line-height: 1.25; }
h4 { font-size: 14px; font-family: var(--sans); font-weight: 500; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 8px; }
p { margin-bottom: 16px; max-width: var(--measure); }
p.lead { font-family: var(--serif); font-size: clamp(22px, 2.5vw, 26px); font-style: italic; color: var(--ink-2); font-weight: 400; line-height: 1.35; }
.dim { color: var(--dim); }
.muted { color: var(--muted); }
strong { font-weight: 600; color: var(--ink); }
a { color: var(--accent); text-decoration: none; border-bottom: 1px solid transparent; transition: border-color 0.15s; }
a:hover { border-bottom-color: var(--accent); }

em.n { font-style: normal; font-weight: 600; color: var(--accent); font-variant-numeric: tabular-nums; }

/* ── Layout ──────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--gutter); }
.container-narrow { max-width: 780px; margin: 0 auto; padding: 0 var(--gutter); }

section { padding: clamp(48px, 8vw, 96px) 0; }
section + section { border-top: 1px solid var(--rule); }

.eyebrow {
  display: inline-block;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  font-weight: 500;
  margin-bottom: 12px;
}

.accent-rule { width: 40px; height: 2px; background: var(--accent); margin: 24px 0; }

/* ── Header / Nav ──────────────────────────────────── */
header.site {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(250, 248, 241, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--rule);
  height: var(--header-h);
  display: flex;
  align-items: center;
}
header.site .container { display: flex; align-items: center; justify-content: space-between; width: 100%; }

.logo {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.015em;
  color: var(--ink);
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  line-height: 1;
}
.logo:hover { border: none; }
.logo-mark {
  width: 22px; height: 22px;
  display: inline-block;
  position: relative;
  flex-shrink: 0;
}
.logo-mark::before,
.logo-mark::after {
  content: '';
  position: absolute;
  background: var(--accent);
}
.logo-mark::before { width: 22px; height: 1.5px; top: 10.25px; left: 0; }
.logo-mark::after { width: 1.5px; height: 22px; left: 10.25px; top: 0; }
.logo-mark-dot {
  position: absolute; width: 6px; height: 6px;
  background: var(--mark); border-radius: 50%;
  top: 8px; left: 8px;
  box-shadow: 0 0 0 1.5px var(--paper);
}

nav.site { display: flex; align-items: center; gap: clamp(18px, 3vw, 36px); }
nav.site a {
  font-size: 14px; color: var(--ink-2); border: none;
  font-weight: 500;
  position: relative;
}
nav.site a::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.18s;
}
nav.site a:hover::after, nav.site a.active::after { transform: scaleX(1); }
nav.site a:hover { color: var(--ink); border: none; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--ink);
  border-radius: 0;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
  letter-spacing: 0.01em;
}
.btn:hover { background: var(--accent); border-color: var(--accent); color: var(--paper); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn-accent { background: var(--accent); border-color: var(--accent); }
.btn-accent:hover { background: var(--accent-dark); border-color: var(--accent-dark); }

/* ── Hero ──────────────────────────────────── */
.hero {
  padding: clamp(80px, 12vw, 160px) 0 clamp(64px, 10vw, 120px);
  position: relative;
}
.hero .credential {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  font-weight: 500;
  margin-bottom: 24px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.hero .credential::before {
  content: '';
  display: inline-block;
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
}
.hero h1 { max-width: 14ch; margin-bottom: 32px; }
.hero .sub {
  font-family: var(--serif);
  font-size: clamp(20px, 2.4vw, 26px);
  font-style: italic;
  color: var(--ink-2);
  line-height: 1.4;
  max-width: 50ch;
  margin-bottom: 40px;
}
.hero .actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ── Concepts grid ─────────────────────────── */
.concepts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin-top: 32px;
}
.concept {
  background: var(--paper);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.concept .n {
  font-family: var(--serif);
  font-size: 20px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.concept .name {
  font-family: var(--serif);
  font-size: 22px;
  color: var(--ink);
  font-weight: 500;
}
.concept .desc { font-size: 13px; color: var(--muted); line-height: 1.5; }

/* ── Steps / process ─────────────────────────── */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 32px;
}
.step { border-top: 2px solid var(--accent); padding-top: 16px; }
.step .n { font-family: var(--serif); font-size: 42px; font-weight: 300; color: var(--accent); line-height: 1; margin-bottom: 12px; }
.step h3 { font-family: var(--sans); font-size: 16px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink); margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--ink-2); margin-bottom: 0; }

/* ── Stats row ─────────────────────────── */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 24px; margin: 32px 0; }
.stat { border-top: 1px solid var(--ink); padding-top: 16px; }
.stat .n { font-family: var(--serif); font-size: 42px; font-weight: 300; color: var(--accent); line-height: 1; font-variant-numeric: tabular-nums; }
.stat .l { font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-top: 8px; line-height: 1.4; }

/* ── Callout ─────────────────────────── */
.callout {
  border-left: 3px solid var(--accent);
  padding: 20px 28px;
  background: var(--accent-wash);
  margin: 32px 0;
  font-family: var(--serif);
  font-size: clamp(18px, 2vw, 22px);
  font-style: italic;
  color: var(--ink-2);
  line-height: 1.4;
}

/* ── Tables ─────────────────────────── */
table { width: 100%; border-collapse: collapse; font-size: 14px; margin: 16px 0; }
thead th { text-align: left; font-family: var(--sans); font-size: 11px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); border-bottom: 1px solid var(--ink); padding: 8px 12px 8px 0; white-space: nowrap; }
tbody td { padding: 10px 12px 10px 0; border-bottom: 1px solid var(--rule); vertical-align: top; line-height: 1.5; }
tbody tr:hover { background: var(--paper-2); }

/* ── Cards / boxes ─────────────────────────── */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin: 24px 0; }
.card { border: 1px solid var(--rule); padding: 24px; background: var(--paper-2); }
.card h4 { margin-bottom: 8px; color: var(--accent); }
.card p { font-size: 14px; line-height: 1.55; margin-bottom: 0; }

/* ── Price block ─────────────────────────── */
.price-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; margin: 32px 0; }
.price-tier { border-top: 1px solid var(--ink); padding-top: 20px; }
.price-tier .tier-name { font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 12px; font-weight: 500; }
.price-tier .price { font-family: var(--serif); font-size: 38px; line-height: 1; color: var(--ink); font-weight: 400; margin-bottom: 8px; }
.price-tier .price .u { font-size: 14px; color: var(--muted); font-family: var(--sans); font-weight: 400; }
.price-tier .desc { font-size: 14px; color: var(--ink-2); line-height: 1.5; }

/* ── Forms ─────────────────────────── */
.form { display: grid; gap: 16px; max-width: 560px; margin-top: 24px; }
.form-row { display: grid; gap: 8px; }
.form label { font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); font-weight: 500; }
.form input, .form textarea, .form select {
  padding: 12px 14px;
  background: var(--paper);
  border: 1px solid var(--rule);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  border-radius: 0;
  outline: none;
  transition: border-color 0.15s;
}
.form input:focus, .form textarea:focus, .form select:focus { border-color: var(--accent); }
.form textarea { resize: vertical; min-height: 120px; line-height: 1.5; }
.form-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-status { padding: 12px 16px; background: var(--accent-wash); border-left: 3px solid var(--accent); font-size: 14px; margin-top: 12px; }
.form-error { background: #fbf1e6; border-left-color: var(--mark); color: var(--ink); }

/* ── Footer ─────────────────────────── */
footer.site {
  background: var(--paper-2);
  border-top: 1px solid var(--rule);
  padding: 48px 0 24px;
  margin-top: 96px;
  font-size: 14px;
  color: var(--muted);
}
footer.site .f-top { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 32px; margin-bottom: 32px; }
footer.site h5 { font-family: var(--sans); font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em; font-weight: 500; color: var(--ink); margin-bottom: 12px; }
footer.site ul { list-style: none; }
footer.site li { margin-bottom: 6px; }
footer.site a { color: var(--ink-2); border: none; font-size: 14px; }
footer.site a:hover { color: var(--ink); }
footer.site .f-credential { font-family: var(--serif); font-size: 16px; font-style: italic; color: var(--ink-2); line-height: 1.4; max-width: 36ch; margin-top: 8px; }
footer.site .f-bottom { border-top: 1px solid var(--rule); padding-top: 20px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; font-size: 12px; letter-spacing: 0.04em; }

/* ── Directory UI ─────────────────────────── */
.dir-head { display: grid; gap: 16px; margin-bottom: 32px; }
.dir-filters { display: flex; flex-wrap: wrap; gap: 12px; }
.dir-filters select, .dir-filters input { padding: 10px 14px; border: 1px solid var(--rule); background: var(--paper); font-family: var(--sans); font-size: 14px; border-radius: 0; color: var(--ink); }
.dir-filters input { min-width: 240px; }
.dir-count { font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }

.dir-list { display: grid; gap: 0; border-top: 1px solid var(--rule); }
.dir-row { display: grid; grid-template-columns: minmax(0, 2fr) 1fr 1.5fr 80px; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--rule); align-items: center; }
.dir-row .d-name { font-family: var(--serif); font-size: 18px; color: var(--ink); line-height: 1.25; }
.dir-row .d-name a { color: inherit; border: none; }
.dir-row .d-name a:hover { color: var(--accent); }
.dir-row .d-sub { font-size: 12px; color: var(--muted); margin-top: 2px; }
.dir-row .d-tier { font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); font-weight: 500; }
.dir-row .d-geo { font-size: 13px; color: var(--ink-2); }
.dir-row .d-count { font-size: 13px; color: var(--muted); text-align: right; font-variant-numeric: tabular-nums; }
.dir-row.isg { background: var(--mark-wash); padding-left: 12px; border-left: 2px solid var(--mark); }

.pill { display: inline-block; font-size: 10px; font-weight: 600; padding: 2px 6px; text-transform: uppercase; letter-spacing: 0.05em; background: var(--accent-wash); color: var(--accent); border-radius: 2px; margin-right: 4px; }
.pill-keystone { background: var(--paper-3); color: var(--ink-2); }

/* ── Provider detail page ─────────────────────────── */
.prov-hero { padding: 48px 0 24px; }
.prov-hero h1 { font-size: clamp(32px, 4.5vw, 56px); font-weight: 400; }
.prov-meta { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 20px; margin: 32px 0; border-top: 1px solid var(--rule); padding-top: 24px; }
.prov-meta .m-k { font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 4px; font-weight: 500; }
.prov-meta .m-v { font-size: 15px; color: var(--ink); line-height: 1.4; }

/* ── Small screens ─────────────────────────── */
@media (max-width: 720px) {
  nav.site { gap: 14px; }
  nav.site .nav-link { display: none; }
  nav.site .nav-cta { display: inline-flex; }
  .steps { grid-template-columns: 1fr; gap: 20px; }
  footer.site .f-top { grid-template-columns: 1fr 1fr; }
  .dir-row { grid-template-columns: 1fr; gap: 6px; padding: 20px 0; }
  .dir-row .d-count { text-align: left; }
  .form-cols { grid-template-columns: 1fr; }
}

/* ── Utilities ─────────────────────────── */
.visually-hidden { position: absolute; clip: rect(0 0 0 0); width: 1px; height: 1px; overflow: hidden; }
.text-center { text-align: center; }
.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }