/* Bioarchitettura® - Mobile-First Responsive CSS */

/* Reset and Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Color Palette - Inspired by sustainable architecture */
  --primary-green: #2d5016;
  --light-green: #7fb069;
  --accent-earth: #a0785a;
  --neutral-light: #f8f6f0;
  --neutral-dark: #2c3e26;
  --text-primary: #333333;
  --text-secondary: #666666;
  --white: #ffffff;
  
  /* Typography */
  --font-primary: 'Source Sans Pro', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-accent: 'Crimson Text', Georgia, serif;
  
  /* Spacing - 8px baseline */
  --space-xs: 0.5rem;   /* 8px */
  --space-sm: 1rem;     /* 16px */
  --space-md: 1.5rem;   /* 24px */
  --space-lg: 2rem;     /* 32px */
  --space-xl: 3rem;     /* 48px */
  
  /* Breakpoints */
  --mobile: 480px;
  --tablet: 768px;
  --desktop: 1024px;
  --large: 1200px;
}

/* Typography */
body {
  font-family: var(--font-primary);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--neutral-light);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-accent);
  color: var(--primary-green);
  margin-bottom: var(--space-sm);
  line-height: 1.3;
}

h1 {
  font-size: 2rem;
  font-weight: 700;
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

p {
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

a {
  color: var(--primary-green);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--light-green);
}

/* Layout Container */
.container {
  max-width: 100%;
  padding: 0 var(--space-sm);
  margin: 0 auto;
}

/* Header */
.header {
  background-color: var(--white);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) var(--space-sm);
  min-height: 60px;
}

.logo {
  font-family: var(--font-accent);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-green);
  text-decoration: none;
}

.logo:hover {
  color: var(--light-green);
}

/* Navigation */
.nav {
  display: none; /* Hidden by default on mobile */
}

.nav.active {
  display: block;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--white);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  padding: var(--space-sm) 0;
}

.nav-item {
  padding: 0;
}

.nav-link {
  display: block;
  padding: var(--space-sm);
  color: var(--text-primary);
  font-weight: 500;
  border-bottom: 1px solid var(--neutral-light);
  transition: background-color 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  background-color: var(--neutral-light);
  color: var(--primary-green);
}

/* Mobile Menu Button */
.menu-toggle {
  display: block;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--primary-green);
  cursor: pointer;
  padding: var(--space-xs);
}

/* Main Content */
.main {
  padding: var(--space-lg) 0;
  min-height: calc(100vh - 200px);
}

.hero {
  text-align: center;
  padding: var(--space-xl) 0;
  background: linear-gradient(135deg, var(--neutral-light) 0%, #eef2e6 100%);
  margin-bottom: var(--space-lg);
}

.hero-title {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
  color: var(--primary-green);
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.section {
  margin-bottom: var(--space-xl);
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.content-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.card {
  background-color: var(--white);
  border-radius: 8px;
  padding: var(--space-lg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.card-title {
  margin-bottom: var(--space-sm);
  font-size: 1.25rem;
}

/* Button Styles */
.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-md);
  background-color: var(--primary-green);
  color: var(--white);
  border: none;
  border-radius: 4px;
  font-weight: 500;
  text-align: center;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.2s ease;
  text-decoration: none;
}

.btn:hover {
  background-color: var(--light-green);
  color: var(--white);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--primary-green);
  border: 2px solid var(--primary-green);
}

.btn-secondary:hover {
  background-color: var(--primary-green);
  color: var(--white);
}

/* Footer */
.footer {
  background-color: var(--primary-green);
  color: var(--white);
  padding: var(--space-lg) 0;
  margin-top: var(--space-xl);
}

.footer-content {
  text-align: center;
}

.footer-title {
  color: var(--white);
  margin-bottom: var(--space-sm);
}

.footer p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-xs);
}

/* Responsive Design */
@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-lg);
    max-width: var(--tablet);
  }
  
  .header-content {
    padding: var(--space-sm) var(--space-lg);
  }
  
  .menu-toggle {
    display: none;
  }
  
  .nav {
    display: block !important;
    position: static;
    box-shadow: none;
  }
  
  .nav-list {
    flex-direction: row;
    padding: 0;
  }
  
  .nav-link {
    border-bottom: none;
    border-radius: 4px;
    margin: 0 var(--space-xs);
  }
  
  .hero-title {
    font-size: 3rem;
  }
  
  .content-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: left;
  }
}

@media (min-width: 1024px) {
  .container {
    max-width: var(--desktop);
  }
  
  .hero-title {
    font-size: 3.5rem;
  }
  
  .content-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1200px) {
  .container {
    max-width: var(--large);
  }
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.mb-lg {
  margin-bottom: var(--space-lg);
}

.hidden {
  display: none;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus styles for keyboard navigation */
a:focus,
button:focus,
.menu-toggle:focus {
  outline: 2px solid var(--light-green);
  outline-offset: 2px;
}