/* Longevity Health Analytics - Styles */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&family=Fraunces:wght@600;700&display=swap');

:root {
  --color-bg: #fafaf9;
  --color-text: #1c1917;
  --color-text-secondary: #57534e;
  --color-accent: #0d9488;
  --color-accent-dark: #0f766e;
  --color-border: #e7e5e4;
  --color-card-bg: #ffffff;
  --font-heading: 'Fraunces', Georgia, serif;
  --font-body: 'DM Sans', -apple-system, sans-serif;
}

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

html {
  font-size: 18px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Navigation */
nav {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-card-bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

nav .container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.logo-img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.logo-text {
  display: flex;
}

.logo-accent {
  color: var(--color-accent);
}

nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

nav a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

nav a:hover,
nav a.active {
  color: var(--color-accent);
}

/* Main Content */
main {
  flex: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 2rem;
  width: 100%;
}

/* Brand Block */
.brand-block {
  text-align: center;
  padding: 3rem 0 2rem;
  margin-bottom: 2rem;
}

.brand-logo {
  width: 180px;
  height: 180px;
  border-radius: 36px;
  margin-bottom: 1.5rem;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.brand-tagline {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  font-weight: 400;
}

/* Hero Section */
.hero {
  max-width: 720px;
  margin-bottom: 4rem;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

.hero p {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
}

.hero .highlight {
  color: var(--color-accent);
  font-weight: 500;
}

/* Section Titles */
h2 {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 2rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.card h3 {
  margin-bottom: 0.5rem;
}

.card p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
}

.card-link:hover {
  color: var(--color-accent-dark);
}

/* Blog Posts */
.post-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.post-item {
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
}

.post-item:last-child {
  border-bottom: none;
}

.post-date {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.5rem;
}

.post-item h3 {
  margin-bottom: 0.5rem;
}

.post-item h3 a {
  color: var(--color-text);
  text-decoration: none;
}

.post-item h3 a:hover {
  color: var(--color-accent);
}

.post-excerpt {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* About Page */
.about-content {
  max-width: 720px;
}

.about-content p {
  margin-bottom: 1.5rem;
  color: var(--color-text-secondary);
}

.about-content p:first-of-type {
  font-size: 1.15rem;
  color: var(--color-text);
}

/* Apps Page */
.app-card {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 2rem;
  margin-bottom: 1.5rem;
}

.app-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  border-radius: 18px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
}

.app-icon-img {
  width: 80px;
  height: 80px;
  border-radius: 18px;
  flex-shrink: 0;
  object-fit: cover;
}

.app-info h3 {
  margin-bottom: 0.5rem;
}

.app-info p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.app-store-link {
  display: inline-block;
  background: var(--color-text);
  color: white;
  padding: 0.6rem 1.25rem;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.2s ease;
}

.app-store-link:hover {
  background: var(--color-accent-dark);
}

/* Footer */
footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem;
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  html {
    font-size: 16px;
  }
  
  nav .container {
    flex-direction: column;
    gap: 1rem;
  }
  
  nav ul {
    gap: 1.5rem;
  }
  
  .hero h1 {
    font-size: 2.25rem;
  }
  
  main {
    padding: 2rem 1.25rem;
  }
  
  .app-card {
    flex-direction: column;
    gap: 1.5rem;
  }
}