:root {
  /* === TENDED TRACKING BRAND PALETTE (from logo) === */
  /* Primary: vital-sign blue from logo */
  --primary: #2A6B8A;
  --primary-dark: #1C4F68;
  --primary-light: #CBE3EF;

  /* Accent: "TRACKING" gold/orange from logo wordmark */
  --accent: #E8A020;
  --accent-dark: #C07B10;
  --accent-light: #FBE9C3;

  /* App-specific: logo bar colors */
  --heart: #E8394A;       /* red bar */
  --heart-light: #FAD2D6;
  --heart-dark: #B5222F;
  --diabetes: #5BAECB;    /* sky-blue bar */
  --diabetes-light: #C8E7F2;
  --kidney: #D4621A;      /* orange bar — warmer, deeper than accent gold */
  --kidney-light: #F5DDD0;
  --purple: #9B6BB5;      /* purple bar — future app */
  --purple-light: #E8DAF2;

  /* Legacy aliases (keep for footer/contact/form which we're not touching) */
  --red: #E8394A;
  --red-light: #FAD2D6;
  --red-dark: #B5222F;
  --aqua: #2A6B8A;
  --aqua-light: #CBE3EF;
  --orange: #E8A020;
  --orange-light: #FBE9C3;

  --gray-50: #F7F9FB;
  --gray-100: #EEF2F6;
  --gray-200: #DDE4EC;
  --gray-400: #9AAAB8;
  --gray-600: #4A5E70;
  --gray-900: #0F1E28;
  --white: #FFFFFF;
  --font-display: 'Poppins', sans-serif;
  --font-body: 'Poppins', sans-serif;
  --radius: 16px;
  --shadow: 0 4px 24px rgba(42,107,138,0.10);
  --shadow-lg: 0 12px 48px rgba(42,107,138,0.16);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--gray-900);
  background: var(--white);
  line-height: 1.6;
}

/* NAV */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  padding: 0 40px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--gray-900);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--gray-600);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--primary); }

/* HERO WRAPPER */
.hero-wrapper {
  background: radial-gradient(ellipse 80% 60% at 70% 40%, rgba(42,107,138,0.07) 0%, transparent 70%),
              radial-gradient(ellipse 50% 40% at 20% 80%, rgba(232,160,32,0.05) 0%, transparent 60%),
              var(--white);
}

/* HERO */
.hero {
  min-height: 100vh;
  padding: 120px 40px 80px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-content h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 4vw, 3.8rem);
  font-weight: 900;
  line-height: 1.1;
  color: var(--gray-900);
  margin-bottom: 24px;
}

.hero-content h1 span {
  color: var(--accent);
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 480px;
}

.hero-conditions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 40px;
}

.condition-tag {
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gray-600);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  background: var(--primary);
  color: white;
  padding: 14px 28px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
  display: inline-block;
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(42,107,138,0.35);
}

.btn-secondary {
  background: transparent;
  color: var(--gray-900);
  padding: 14px 28px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid var(--gray-200);
  transition: all 0.2s;
  display: inline-block;
}

.btn-secondary:hover {
  border-color: var(--gray-400);
  transform: translateY(-1px);
}

/* PHONE MOCKUPS */
.hero-phones {
  position: relative;
  height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.phone-mockup {
  width: 240px;
  border-radius: 36px;
  box-shadow: var(--shadow-lg), 0 0 0 8px #1A1A1A, 0 0 0 10px #333;
  overflow: hidden;
  position: absolute;
  transition: transform 0.3s ease;
}

.phone-mockup:hover { transform: translateY(-8px) !important; }

.phone-mockup img {
  width: 100%;
  display: block;
}

.phone-1 { transform: rotate(-6deg) translateX(-80px); z-index: 2; }
.phone-2 { transform: rotate(4deg) translateX(60px) translateY(30px); z-index: 1; }

/* SECTION COMMON */
section {
  padding: 100px 40px;
}

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--gray-600);
  max-width: 560px;
  line-height: 1.7;
}

/* APPS SECTION */
.apps-section {
  background: var(--gray-50);
  position: relative;
}

.apps-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-top: 64px;
}

.app-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 40px 32px;
  box-shadow: var(--shadow);
  border-top: 4px solid var(--card-color);
  transition: transform 0.2s, box-shadow 0.2s;
}

.app-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.app-card.heart { --card-color: var(--heart); }
.app-card.diabetes { --card-color: var(--diabetes); }
.app-card.kidney { --card-color: var(--kidney); }
.app-card.memory { --card-color: var(--purple); }

.app-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
  font-size: 24px;
}

.heart .app-icon { background: var(--heart-light); }
.diabetes .app-icon { background: var(--diabetes-light); }
.kidney .app-icon { background: var(--kidney-light); }
.memory .app-icon { background: var(--purple-light); }

.app-card h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.app-card .app-subtitle {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.heart .app-subtitle { color: var(--heart); }
.diabetes .app-subtitle { color: var(--diabetes); }
.kidney .app-subtitle { color: var(--kidney); }
.memory .app-subtitle { color: var(--purple); }

.app-card p {
  color: var(--gray-600);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 24px;
}

.app-conditions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 24px;
}

.app-condition-tag {
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
}

.heart .app-condition-tag { background: var(--heart-light); color: var(--heart-dark); }
.diabetes .app-condition-tag { background: var(--diabetes-light); color: var(--diabetes); }
.kidney .app-condition-tag { background: var(--kidney-light); color: var(--kidney); }
.memory .app-condition-tag { background: var(--purple-light); color: var(--purple); }

.app-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.app-features-list li {
  font-size: 0.9rem;
  color: var(--gray-600);
  display: flex;
  align-items: center;
  gap: 8px;
}

.app-features-list li::before {
  content: '✓';
  font-weight: 700;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.heart .app-features-list li::before { color: var(--heart); }
.diabetes .app-features-list li::before { color: var(--diabetes); }
.kidney .app-features-list li::before { color: var(--kidney); }
.memory .app-features-list li::before { color: var(--purple); }

/* FEATURES SECTION */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 64px;
}

.feature-card {
  padding: 32px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--gray-200);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow);
}

.feature-icon {
  width: 48px; height: 48px;
  background: var(--primary-light);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  margin-bottom: 16px;
}

.feature-card h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--gray-600);
  line-height: 1.6;
}

/* ARTICLES */
.articles-section {
  background: var(--gray-50);
}

.articles-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 64px;
}

.article-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s;
  display: flex;
  flex-direction: row;
  align-items: stretch;
}

.article-card:hover { transform: translateY(-3px); }

.article-thumb {
  width: 160px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
}

.article-thumb.red { background: var(--heart-light); }
.article-thumb.aqua { background: var(--diabetes-light); }
.article-thumb.orange { background: var(--kidney-light); }
.article-thumb.purple { background: var(--purple-light); }

.article-body { padding: 24px; }

.article-tag {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--heart);
  margin-bottom: 8px;
  display: block;
}

.article-body h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 8px;
}

.article-body p {
  font-size: 0.875rem;
  color: var(--gray-600);
  line-height: 1.6;
}

/* CONTACT/SUBSCRIBE */
.contact-section {
  background: var(--primary-dark);
  color: var(--white);
  padding: 100px 0;
}

.contact-section .section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  margin-top: 64px;
  align-items: start;
}

.contact-info h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--white);
}

.contact-info p {
  font-size: 0.95rem;
  color: var(--gray-400);
  line-height: 1.7;
  margin-bottom: 32px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--gray-400);
}

.form-group input,
.form-group select,
.form-group textarea {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 10px;
  padding: 12px 16px;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
}

.form-group select option { background: var(--primary-dark); }

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255,255,255,0.3);
}

/* FOOTER */
footer {
  background: var(--primary-dark);
}

/* POLICY PAGES */
.policy-page {
  display: none;
  padding: 120px 40px 80px;
  max-width: 800px;
  margin: 0 auto;
}

.policy-page.active { display: block; }

.policy-page h1 {
  font-family: var(--font-display);
  font-size: 2.5rem;
  margin-bottom: 8px;
}

.policy-page .last-updated {
  color: var(--gray-400);
  font-size: 0.875rem;
  margin-bottom: 48px;
  display: block;
}

.policy-page h2 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 36px 0 12px;
  color: var(--gray-900);
}

.policy-page p, .policy-page li {
  color: var(--gray-600);
  line-height: 1.8;
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.policy-page ul { padding-left: 24px; margin-bottom: 16px; }

/* MAIN SITE */
#main-site { display: block; }

/* DISCLAIMER */
.disclaimer-bar {
  background: var(--primary-light);
  border-bottom: 1px solid var(--gray-200);
  padding: 10px 40px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--primary-dark);
  margin-top: 72px;
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding: 100px 24px 60px; }
  .hero-phones { display: none; }
  .apps-grid, .features-grid { grid-template-columns: 1fr; }
  .article-card { flex-direction: column; }
  .article-thumb { width: 100%; height: 140px; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .form-row { grid-template-columns: 1fr; }
  nav { padding: 0 24px; }
  .nav-links { display: none; }
  section { padding: 60px 24px; }
}

/* ===========================
   SHARED PAGE STYLES
   (used by policy, help pages)
   =========================== */
.page-wrap {
  max-width: 740px;
  margin: 0 auto;
  padding: 60px 32px 80px;
}
.page-wrap h1 {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 6px;
}
.page-wrap .last-updated {
  color: var(--gray-400);
  font-size: 0.8rem;
  margin-bottom: 36px;
  display: block;
}
.page-wrap h2 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--gray-900);
  margin: 32px 0 10px;
  padding-top: 8px;
  border-top: 1px solid var(--gray-100);
}
.page-wrap p {
  color: var(--gray-600);
  line-height: 1.85;
  font-size: 0.9rem;
  margin-bottom: 12px;
}
.page-wrap ul {
  padding-left: 20px;
  margin-bottom: 16px;
}
.page-wrap li {
  color: var(--gray-600);
  line-height: 1.85;
  font-size: 0.9rem;
  margin-bottom: 6px;
}
.page-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 32px;
}
.page-back:hover { color: var(--primary-dark); }