/* CardioOK Marketing Website — matches Flutter app & doctor portal */
:root {
  --brand: #00ad48;
  --brand-dark: #009a3f;
  --brand-soft: #e4f8ea;
  --brand-glow: rgba(0, 173, 72, 0.12);
  --bg: #fbfaf7;
  --bg-alt: #f4f3ee;
  --card: #ffffff;
  --ink: #1c1c1e;
  --muted: #8b8b97;
  --line: #e5e5ea;
  --gold: #f5a623;
  --red: #b71c1c;
  --amber: #f9a825;
  --green: #2e7d32;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.1);
  --radius: 16px;
  --radius-sm: 10px;
  --max: 1120px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
}

img, svg { max-width: 100%; height: auto; display: block; }

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

h1, h2, h3, h4 {
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3rem); margin: 0 0 1rem; }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); margin: 0 0 0.75rem; }
h3 { font-size: 1.25rem; margin: 0 0 0.5rem; }

p { margin: 0 0 1rem; }

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: inherit;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.25rem;
}

.logo-link:hover { text-decoration: none; }
.logo-link img, .logo-link svg { height: 36px; width: auto; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  font-size: 1.25rem;
  cursor: pointer;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav a {
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a.active {
  background: var(--brand-soft);
  color: var(--brand-dark);
  text-decoration: none;
}

.nav-cta {
  margin-left: 0.35rem;
}

.site-nav .btn.nav-cta {
  padding: 0.55rem 1.1rem;
  font-size: 0.9rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s, box-shadow 0.15s;
}

.btn:hover { text-decoration: none; transform: translateY(-1px); }

.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 4px 14px var(--brand-glow);
}

.btn-primary:hover { background: var(--brand-dark); color: #fff; }

.btn-dark {
  background: var(--ink);
  color: #fff;
}

.btn-dark:hover { background: #000; color: #fff; }

.btn-secondary {
  background: var(--card);
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn-secondary:hover { background: var(--bg-alt); color: var(--ink); }

.btn-ghost {
  background: transparent;
  color: var(--brand);
  border: 1px solid var(--brand);
}

.btn-lg { padding: 1rem 2rem; font-size: 1.05rem; }

/* Hero */
.hero {
  padding: 4rem 0 3rem;
  background: linear-gradient(180deg, var(--brand-soft) 0%, var(--bg) 60%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  background: var(--card);
  border: 1px solid var(--line);
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--brand-dark);
  margin-bottom: 1rem;
}

.hero-lead {
  font-size: 1.2rem;
  color: var(--muted);
  max-width: 32rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.hero-stats {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.hero-stat strong {
  display: block;
  font-size: 1.5rem;
  color: var(--brand);
}

.hero-stat span { font-size: 0.85rem; color: var(--muted); }

/* Sections */
.section {
  padding: 4rem 0;
}

.section-alt { background: var(--bg-alt); }

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3rem;
}

.section-header p { color: var(--muted); font-size: 1.1rem; }

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.75rem;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--brand-soft);
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.card h3 { font-weight: 700; }

.card p { color: var(--muted); font-size: 0.95rem; margin-bottom: 0; }

/* Audience split */
.audience-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.audience-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  padding: 2.5rem;
  color: #fff;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.audience-card.patients {
  background: linear-gradient(135deg, #00ad48 0%, #007a33 100%);
}

.audience-card.doctors {
  background: linear-gradient(135deg, #1c1c1e 0%, #3a3a3c 100%);
}

.audience-card h2 { color: #fff; }
.audience-card p { color: rgba(255,255,255,0.85); }
.audience-card .btn { align-self: flex-start; margin-top: 1rem; }

.audience-card.patients .btn { background: #fff; color: var(--brand-dark); }
.audience-card.doctors .btn { background: var(--brand); color: #fff; }

/* Articles */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.article-card {
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  transition: box-shadow 0.2s, transform 0.2s;
}

.article-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  text-decoration: none;
}

.article-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: var(--brand-soft);
}

.article-card-body { padding: 1.25rem; color: var(--ink); }
.article-card-body h3 { font-size: 1.1rem; }
.article-card-body p { font-size: 0.9rem; color: var(--muted); margin: 0; }

.article-meta {
  display: flex;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.tag {
  display: inline-block;
  background: var(--brand-soft);
  color: var(--brand-dark);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* Article page */
.article-page { padding: 2rem 0 4rem; }

.article-page .container { max-width: 760px; }

.article-page h1 { margin-bottom: 0.5rem; }

.article-page .article-meta {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
}

.article-page h2 { margin-top: 2rem; }
.article-page ul, .article-page ol { margin-bottom: 1rem; padding-left: 1.5rem; }
.article-page li { margin-bottom: 0.5rem; }

.disclaimer {
  background: var(--bg-alt);
  border-left: 4px solid var(--amber);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.9rem;
  color: var(--muted);
  margin: 2rem 0;
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  align-items: start;
}

.pricing-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
}

.pricing-card.featured {
  border-color: var(--brand);
  box-shadow: var(--shadow-md);
  position: relative;
}

.pricing-card.featured::before {
  content: "Most popular";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--brand);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
}

.pricing-price {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--brand);
  margin: 1rem 0;
}

.pricing-price span { font-size: 1rem; color: var(--muted); font-weight: 400; }

.pricing-features {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
  text-align: left;
}

.pricing-features li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
}

.pricing-features li::before {
  content: "✓";
  color: var(--brand);
  font-weight: 700;
  margin-right: 0.5rem;
}

/* CTA band */
.cta-band {
  background: linear-gradient(135deg, var(--brand) 0%, #007a33 100%);
  color: #fff;
  padding: 4rem 0;
  text-align: center;
}

.cta-band h2 { color: #fff; }
.cta-band p { color: rgba(255,255,255,0.9); max-width: 520px; margin: 0 auto 1.5rem; }
.cta-band .btn-primary { background: #fff; color: var(--brand-dark); }

/* Footer */
.site-footer {
  background: var(--ink);
  color: rgba(255,255,255,0.75);
  padding: 3rem 0 1.5rem;
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-grid h4 {
  color: #fff;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 0.5rem; }
.footer-grid a { color: rgba(255,255,255,0.75); }
.footer-grid a:hover { color: #fff; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Breadcrumb */
.breadcrumb {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
}

.breadcrumb a { color: var(--muted); }

/* Forms */
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-weight: 600; margin-bottom: 0.35rem; font-size: 0.9rem; }

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font: inherit;
  background: var(--card);
}

.form-group textarea { min-height: 140px; resize: vertical; }

.btn-block { width: 100%; text-align: center; }

.form-status {
  margin-top: 1rem;
  font-weight: 600;
  font-size: 0.95rem;
  min-height: 1.4em;
}

.form-status.is-error { color: var(--red); }
.form-status.is-ok { color: var(--brand-dark); }

/* Early-access signup */
.signup-hero {
  padding: 3.5rem 0 4.5rem;
  background:
    radial-gradient(ellipse 80% 60% at 10% 0%, rgba(0, 173, 72, 0.14), transparent 55%),
    radial-gradient(ellipse 70% 50% at 100% 20%, rgba(0, 122, 51, 0.08), transparent 50%),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
}

.signup-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3rem;
  align-items: start;
}

.signup-kicker {
  display: inline-block;
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--brand-dark);
}

.signup-perks {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
}

.signup-perks li {
  position: relative;
  padding: 0.55rem 0 0.55rem 1.75rem;
  color: var(--ink);
}

.signup-perks li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--brand);
  font-weight: 700;
}

.signup-panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 1.75rem;
}

.signup-fineprint {
  margin: 1rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.signup-success { text-align: center; padding: 0.5rem 0; }
.signup-success h2 { margin-top: 0.75rem; }

.signup-success-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto;
  border-radius: 50%;
  background: var(--brand-soft);
  color: var(--brand-dark);
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  font-weight: 700;
}

.signup-success-hint {
  color: var(--muted);
  font-size: 0.9rem;
}

.verify-panel {
  max-width: 640px;
  text-align: center;
  padding: 2rem 0 3rem;
}

.verify-state h1 { margin-bottom: 1rem; }

.referral-box {
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--brand-soft);
  border-radius: var(--radius-sm);
  text-align: left;
}

.referral-box h2 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.referral-row {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.referral-row input {
  flex: 1 1 220px;
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font: inherit;
  background: #fff;
}

/* Feature list with mockups */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  margin-bottom: 4rem;
}

.feature-row.reverse .feature-copy { order: 2; }
.feature-row.reverse .feature-visual { order: 1; }

.feature-copy ul {
  list-style: none;
  padding: 0;
}

.feature-copy li {
  padding: 0.5rem 0 0.5rem 1.75rem;
  position: relative;
}

.feature-copy li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--brand);
  font-weight: 700;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-grid,
  .audience-split,
  .feature-row,
  .footer-grid,
  .signup-grid {
    grid-template-columns: 1fr;
  }

  .feature-row.reverse .feature-copy,
  .feature-row.reverse .feature-visual { order: unset; }

  .nav-toggle { display: block; }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card);
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
  }

  .site-nav.open { display: flex; }

  .header-inner { position: relative; flex-wrap: wrap; }
}

@media (max-width: 600px) {
  .hero-stats { flex-direction: column; gap: 1rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
}