/* =========================================================
   PulmHealth — Public Website Design System
   ========================================================= */

:root {
  --navy: #16324a;
  --navy-2: #1c3d5a;
  --blue: #8fcae7;
  --blue-deep: #2e75b6;
  --blue-pale: #eaf4fb;
  --bg: #f7fafc;
  --bg-alt: #eef4f8;
  --white: #ffffff;
  --text: #1f2b36;
  --text-muted: #57697a;
  --border: #dde6ed;
  --border-soft: #e7eef3;
  --success: #2f8f5b;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 2px 10px rgba(22, 50, 74, 0.06);
  --shadow: 0 10px 30px rgba(22, 50, 74, 0.08);
  --shadow-lg: 0 20px 50px rgba(22, 50, 74, 0.12);
  --maxw: 1180px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--blue-deep); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 {
  font-family: var(--font);
  color: var(--navy-2);
  line-height: 1.15;
  margin: 0 0 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2.1rem, 4vw, 3.1rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 16px; color: var(--text); }
.lede { font-size: 1.15rem; color: var(--text-muted); }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 72px 0; }
.section--tight { padding: 48px 0; }
.section--alt { background: var(--bg); }
.section--navy { background: var(--navy); color: #dfe9f1; }
.section--navy h2, .section--navy h3 { color: #ffffff; }
.section--navy p { color: #c7d7e3; }
.section--pale { background: var(--blue-pale); }

.center { text-align: center; }
.narrow { max-width: 760px; margin-left: auto; margin-right: auto; }

/* -------- Eyebrow / pill tags -------- */
.eyebrow {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--blue-deep);
  background: var(--blue-pale);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.section--navy .eyebrow {
  background: rgba(143, 202, 231, 0.16);
  color: var(--blue);
}

/* -------- Buttons -------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.98rem;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.btn:hover { text-decoration: none; }
.btn-primary {
  background: var(--navy-2);
  color: #ffffff;
}
.btn-primary:hover { background: var(--navy); box-shadow: var(--shadow); transform: translateY(-1px); }
.btn-secondary {
  background: transparent;
  border-color: var(--navy-2);
  color: var(--navy-2);
}
.btn-secondary:hover { background: var(--navy-2); color: #fff; }
.btn-on-navy {
  background: var(--blue);
  color: var(--navy);
}
.btn-on-navy:hover { background: #ffffff; }
.btn-ghost-on-navy {
  background: transparent;
  border-color: rgba(255,255,255,0.5);
  color: #ffffff;
}
.btn-ghost-on-navy:hover { background: rgba(255,255,255,0.12); }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.btn-row.center { justify-content: center; }
.btn-sm { padding: 9px 18px; font-size: 0.88rem; }

/* -------- Header / nav -------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border-soft);
}
.nav-wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { height: 34px; width: auto; }
.brand-wordmark { font-weight: 800; font-size: 1.28rem; color: var(--navy-2); letter-spacing: -0.01em; }

.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  display: block;
  padding: 9px 14px;
  border-radius: 999px;
  color: var(--text);
  font-weight: 600;
  font-size: 0.94rem;
}
.nav-links a:hover { background: var(--bg-alt); text-decoration: none; color: var(--navy-2); }
.nav-links a.active { color: var(--blue-deep); }

.nav-cta { display: flex; align-items: center; gap: 10px; }
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 10px;
  width: 42px; height: 38px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: "";
  display: block;
  width: 20px; height: 2px;
  background: var(--navy-2);
  position: relative;
  transition: 0.2s;
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }

@media (max-width: 900px) {
  .nav-links { position: fixed; top: 66px; left: 0; right: 0; background: #fff; flex-direction: column; align-items: stretch; padding: 10px 20px 20px; border-bottom: 1px solid var(--border-soft); box-shadow: var(--shadow); display: none; gap: 2px; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 10px; border-radius: var(--radius-sm); }
  .nav-toggle { display: inline-flex; }
  .nav-cta .btn-secondary { display: none; }
}

/* -------- Hero -------- */
.hero {
  padding: 64px 0 56px;
  background: linear-gradient(180deg, var(--blue-pale) 0%, #ffffff 78%);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.hero h1 { margin-bottom: 18px; }
.hero .lede { margin-bottom: 6px; }
.hero-art {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow);
  padding: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
}
.hero-art img { width: 100%; max-width: 260px; }
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
}

/* -------- Cards / grids -------- */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.card {
  background: #fff;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.card h3 { margin-bottom: 10px; }
.card p:last-child { margin-bottom: 0; }
.card .card-icon {
  width: 46px; height: 46px;
  border-radius: 12px;
  background: var(--blue-pale);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
  font-size: 1.3rem;
}

.platform-card {
  background: #fff;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 34px;
  box-shadow: var(--shadow-sm);
}
.platform-card .tag { color: var(--blue-deep); font-weight: 700; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; }
.platform-card h3 { font-size: 1.5rem; margin-top: 8px; }

/* -------- Quote / guardrail block -------- */
.quote-block {
  border-left: 4px solid var(--blue-deep);
  background: var(--blue-pale);
  padding: 18px 22px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--navy-2);
  font-style: italic;
  margin: 18px 0;
}
.quote-block p { margin: 0; color: var(--navy-2); }

.guardrail {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
}
.guardrail h3 { margin-bottom: 10px; }

/* -------- Tables -------- */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border-soft); box-shadow: var(--shadow-sm); }
table { width: 100%; border-collapse: collapse; background: #fff; font-size: 0.92rem; min-width: 720px; }
thead th {
  background: var(--navy-2);
  color: #fff;
  text-align: left;
  padding: 13px 16px;
  font-weight: 700;
  position: sticky; top: 0;
}
tbody td, tbody th {
  padding: 11px 16px;
  border-bottom: 1px solid var(--border-soft);
  text-align: left;
  font-weight: 400;
}
tbody th { font-weight: 700; color: var(--navy-2); background: var(--bg-alt); }
tbody tr:nth-child(even) td { background: #fbfdfe; }
.table-wrap.pricing td:first-child, .table-wrap.pricing th:first-child { min-width: 220px; }

/* -------- Pricing cards -------- */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; align-items: stretch; }
@media (max-width: 980px) { .pricing-grid { grid-template-columns: 1fr; } }
.price-card {
  background: #fff;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 30px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
}
.price-card.featured {
  border: 2px solid var(--blue-deep);
  box-shadow: var(--shadow);
  position: relative;
}
.price-card.featured::before {
  content: "Recommended";
  position: absolute;
  top: -13px; left: 26px;
  background: var(--blue-deep);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 999px;
}
.price-card .price { font-size: 2.2rem; font-weight: 800; color: var(--navy-2); margin: 6px 0 4px; }
.price-card .price small { font-size: 1rem; font-weight: 600; color: var(--text-muted); }
.price-card .best-for { color: var(--text-muted); font-size: 0.92rem; margin-bottom: 18px; }
.price-card ul { margin: 0 0 24px; padding-left: 20px; flex-grow: 1; }
.price-card ul li { margin-bottom: 8px; font-size: 0.94rem; }
.price-card .btn { width: 100%; }

/* -------- Lists -------- */
ul.check-list { list-style: none; padding: 0; margin: 0 0 16px; }
ul.check-list li { position: relative; padding-left: 28px; margin-bottom: 10px; }
ul.check-list li::before {
  content: "";
  position: absolute; left: 0; top: 7px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--blue);
}

/* -------- FAQ -------- */
.faq-item {
  border-bottom: 1px solid var(--border-soft);
  padding: 4px 0;
}
.faq-item summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--navy-2);
  padding: 16px 4px;
  list-style: none;
  position: relative;
  padding-right: 30px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 4px; top: 14px;
  font-size: 1.3rem;
  color: var(--blue-deep);
}
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p { padding: 0 4px 18px; color: var(--text-muted); }

/* -------- Use case / data layer chips -------- */
.chip-list { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.88rem;
  color: var(--navy-2);
  font-weight: 600;
}

/* -------- Use case card structure -------- */
.usecase-card .meta { font-size: 0.86rem; color: var(--text-muted); margin-bottom: 4px; }
.usecase-card .meta strong { color: var(--navy-2); }

/* -------- Stat / why-now list -------- */
.reason-list { display: grid; gap: 14px; }
.reason-item { display: flex; gap: 14px; align-items: flex-start; }
.reason-item .dot { flex: none; width: 10px; height: 10px; border-radius: 50%; background: var(--blue-deep); margin-top: 8px; }

/* -------- Ecosystem row -------- */
.ecosystem-row { display: flex; flex-wrap: wrap; gap: 30px; align-items: center; }
.ecosystem-badge {
  display: flex; align-items: center; gap: 10px;
  background: #fff; border: 1px solid var(--border-soft);
  border-radius: var(--radius); padding: 12px 18px;
  font-weight: 700; color: var(--navy-2); font-size: 0.92rem;
  box-shadow: var(--shadow-sm);
}

/* -------- Steps -------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr; } }
.step { background: #fff; border: 1px solid var(--border-soft); border-radius: var(--radius); padding: 24px; }
.step .num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--navy-2); color: #fff; font-weight: 800; font-size: 0.9rem;
  margin-bottom: 12px;
}

/* -------- CTA band -------- */
.cta-band {
  background: var(--navy-2);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
  color: #fff;
}
.cta-band h2 { color: #fff; }
.cta-band p { color: #cfe0ec; }

/* -------- Forms -------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 700px) { .form-grid { grid-template-columns: 1fr; } }
.form-field { display: flex; flex-direction: column; gap: 6px; }
.form-field.full { grid-column: 1 / -1; }
label { font-weight: 700; font-size: 0.88rem; color: var(--navy-2); }
input, select, textarea {
  font-family: var(--font);
  font-size: 0.96rem;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text);
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--blue-deep);
  box-shadow: 0 0 0 3px rgba(46,117,182,0.15);
}
textarea { resize: vertical; min-height: 130px; }
.form-note { font-size: 0.85rem; color: var(--text-muted); margin-top: 6px; }
.alert {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  font-weight: 600;
}
.alert-success { background: #e7f6ee; color: var(--success); border: 1px solid #c3e9d3; }
.alert-error { background: #fdecec; color: #b3261e; border: 1px solid #f6c6c3; }

.contact-info-list { list-style: none; padding: 0; margin: 24px 0 0; }
.contact-info-list li { padding: 10px 0; border-top: 1px solid var(--border-soft); font-size: 0.94rem; }
.contact-info-list li:first-child { border-top: none; }

/* -------- Footer -------- */
.site-footer { background: var(--navy); color: #cddce7; padding: 56px 0 26px; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 40px; }
@media (max-width: 900px) { .footer-top { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-top { grid-template-columns: 1fr; } }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-brand img { height: 30px; }
.footer-brand span { color: #fff; font-weight: 800; font-size: 1.15rem; }
.site-footer p { color: #aec2d1; font-size: 0.92rem; }
.footer-col h4 { color: #fff; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 14px; }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: #cddce7; font-size: 0.92rem; }
.footer-col a:hover { color: #fff; }
.footer-ecosystem { font-size: 0.82rem; color: #93a9b9; margin-top: 6px; }
.footer-disclaimer {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 22px;
  margin-top: 22px;
  font-size: 0.82rem;
  color: #93a9b9;
}
.footer-bottom {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 20px; margin-top: 20px;
  font-size: 0.82rem; color: #93a9b9;
}

/* -------- Legal pages -------- */
.legal-body h3 { margin-top: 32px; }
.legal-body { max-width: 820px; }
.legal-meta { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 30px; }
.legal-note {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 40px;
}

/* -------- Misc -------- */
.divider { height: 1px; background: var(--border-soft); margin: 40px 0; border: none; }
.breadcrumb { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 18px; }
.breadcrumb a { color: var(--text-muted); }
.section-head { max-width: 720px; margin-bottom: 40px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }