/**
 * GAIALED Design System
 * Based on Brand Package v1.0
 * Swiss Evidence Ledger - Professional Styling
 */

/* ========================================
   1. FONT LOADING (Inter - Open Font License)
   ======================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ========================================
   2. CSS VARIABLES - Design Tokens
   ======================================== */
:root {
  /* Brand Colors */
  --color-brand-green: #16A34A;
  --color-brand-slate: #0F172A;
  
  /* Grayscale */
  --color-gray-600: #64748B;
  --color-gray-300: #CBD5E1;
  --color-gray-200: #E5E7EB;
  --color-gray-50: #F9FAFB;
  
  /* Semantic Colors */
  --color-success: #16A34A;
  --color-error: #DC2626;
  --color-warning: #F59E0B;
  --color-info: #3B82F6;
  
  /* Typography */
  --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.6;
  
  /* Spacing */
  --spacing-xs: 0.5rem;   /* 8px */
  --spacing-sm: 1rem;     /* 16px */
  --spacing-md: 1.5rem;   /* 24px */
  --spacing-lg: 2rem;     /* 32px */
  --spacing-xl: 3rem;     /* 48px */
  --spacing-2xl: 4rem;    /* 64px */
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  
  /* Container */
  --container-max-width: 1200px;
  --container-padding: 2rem;
}

/* ========================================
   3. RESET & BASE
   ======================================== */
*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-base);
  line-height: var(--line-height-base);
  color: var(--color-brand-slate);
  background: #ffffff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   4. TYPOGRAPHY
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 { font-size: 3rem; }      /* 48px */
h2 { font-size: 2.25rem; }   /* 36px */
h3 { font-size: 1.875rem; }  /* 30px */
h4 { font-size: 1.5rem; }    /* 24px */
h5 { font-size: 1.25rem; }   /* 20px */
h6 { font-size: 1rem; }      /* 16px */

p {
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--color-brand-green);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #15803d;
  text-decoration: underline;
}

strong {
  font-weight: 600;
}

code {
  font-family: 'Courier New', monospace;
  background: var(--color-gray-50);
  padding: 0.2em 0.4em;
  border-radius: var(--radius-sm);
  font-size: 0.875em;
  color: var(--color-brand-slate);
}

/* ========================================
   5. LAYOUT
   ======================================== */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--spacing-2xl) 0;
}

.section-alt {
  background: var(--color-gray-50);
}

/* ========================================
   6. HEADER & NAVIGATION
   ======================================== */
.header {
  background: #ffffff;
  border-bottom: 1px solid var(--color-gray-200);
  padding: var(--spacing-sm) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-brand-slate);
}

.logo:hover {
  text-decoration: none;
}

.nav {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav a {
  color: var(--color-gray-600);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: color 0.2s ease;
}

.nav a:hover {
  color: var(--color-brand-green);
  text-decoration: none;
}

.nav a.active {
  color: var(--color-brand-green);
}

/* ========================================
   7. FOOTER
   ======================================== */
.footer {
  background: var(--color-brand-slate);
  color: var(--color-gray-300);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  margin-top: var(--spacing-2xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
}

.footer-section h5 {
  color: #ffffff;
  font-size: 1rem;
  margin-bottom: var(--spacing-sm);
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: var(--spacing-xs);
}

.footer-section a {
  color: var(--color-gray-300);
  font-size: 0.875rem;
}

.footer-section a:hover {
  color: #ffffff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-md);
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-gray-600);
}

/* ========================================
   8. BUTTONS
   ======================================== */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-brand-green);
  color: #ffffff;
}

.btn-primary:hover {
  background: #15803d;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--color-brand-slate);
  color: #ffffff;
}

.btn-secondary:hover {
  background: #1e293b;
  text-decoration: none;
  transform: translateY(-1px);
}

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

.btn-outline:hover {
  background: var(--color-brand-green);
  color: #ffffff;
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ========================================
   9. CARDS
   ======================================== */
.card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.card-header {
  margin-bottom: var(--spacing-md);
}

.card-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-brand-slate);
  margin-bottom: var(--spacing-xs);
}

.card-subtitle {
  font-size: 0.875rem;
  color: var(--color-gray-600);
}

/* ========================================
   10. FORMS
   ======================================== */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-brand-slate);
  font-size: 0.9375rem;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-family: var(--font-family-base);
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-brand-green);
  box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.1);
}

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

.form-message {
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  margin-top: var(--spacing-md);
  font-size: 0.9375rem;
}

.form-message.success {
  background: #dcfce7;
  color: #15803d;
  border: 1px solid #86efac;
}

.form-message.error {
  background: #fee2e2;
  color: #b91c1c;
  border: 1px solid #fca5a5;
}

/* ========================================
   11. HERO SECTION
   ======================================== */
.hero {
  background: linear-gradient(135deg, var(--color-brand-slate) 0%, #1e293b 100%);
  color: #ffffff;
  padding: var(--spacing-2xl) 0;
  text-align: center;
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: var(--spacing-md);
}

.hero .tagline {
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--color-gray-300);
  margin-bottom: var(--spacing-xl);
}

.hero .baseline {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-brand-green);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: var(--spacing-sm);
}

/* ========================================
   12. PRICING CARDS
   ======================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.pricing-card {
  background: #ffffff;
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  border: 2px solid var(--color-gray-200);
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-brand-green);
}

.pricing-card.featured {
  border-color: var(--color-brand-green);
  border-width: 3px;
  background: linear-gradient(180deg, #ffffff 0%, #f0fdf4 100%);
}

.pricing-card h3 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-sm);
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-brand-green);
  margin-bottom: var(--spacing-xs);
}

.pricing-period {
  color: var(--color-gray-600);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-lg);
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin-bottom: var(--spacing-lg);
}

.pricing-features li {
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid var(--color-gray-200);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-features li::before {
  content: '✓';
  color: var(--color-brand-green);
  font-weight: bold;
  margin-right: var(--spacing-xs);
}

/* ========================================
   13. STATUS INDICATORS
   ======================================== */
.status {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
}

.status-operational {
  background: #dcfce7;
  color: #15803d;
}

.status-degraded {
  background: #fef3c7;
  color: #b45309;
}

.status-outage {
  background: #fee2e2;
  color: #b91c1c;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
}

/* ========================================
   14. TRUST SECTIONS
   ======================================== */
.trust-section {
  margin-bottom: var(--spacing-2xl);
  padding: var(--spacing-xl);
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-gray-200);
}

.trust-section h3 {
  color: var(--color-brand-green);
  margin-bottom: var(--spacing-md);
}

.trust-section ul {
  list-style: none;
  padding-left: 0;
}

.trust-section li {
  padding: var(--spacing-xs) 0;
  padding-left: var(--spacing-lg);
  position: relative;
}

.trust-section li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-brand-green);
  font-weight: bold;
}

/* ========================================
   15. RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
    --spacing-2xl: 3rem;
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.5rem; }
  
  .hero h1 { font-size: 2.5rem; }
  .hero .tagline { font-size: 1.25rem; }
  
  .nav {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   16. UTILITY CLASSES
   ======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.hidden { display: none; }

/* Honeypot field (must be hidden) */
.honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
}