/* YAFFS Website - Modern, Clean, Professional Design */
/* Theme: Reliability, Trust, Technical Excellence */

:root {
  /* Colors - Blue for trust/aerospace, Orange for energy/action */
  --primary-blue: #0066cc;
  --primary-blue-dark: #004c99;
  --primary-blue-light: #3385db;
  --accent-orange: #ff6b35;
  --accent-orange-dark: #e55a2b;

  /* Neutrals */
  --text-dark: #1a1a1a;
  --text-medium: #4a4a4a;
  --text-light: #6a6a6a;
  --bg-white: #ffffff;
  --bg-light: #f8f9fa;
  --bg-lighter: #fafbfc;
  --border-light: #e1e4e8;
  --border-medium: #d1d5da;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;

  /* Borders & Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  color: var(--text-dark);
  background: var(--bg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-dark);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-medium);
}

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

a:hover {
  color: var(--primary-blue-dark);
  text-decoration: underline;
}

/* Container & Layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-wide {
  max-width: 1400px;
}

.container-narrow {
  max-width: 800px;
}

/* Header & Navigation */
.site-header {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
}

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

.logo:hover {
  text-decoration: none;
  color: var(--primary-blue-dark);
}

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

.nav-main a {
  color: var(--text-dark);
  font-weight: 500;
  text-decoration: none;
  padding: var(--spacing-xs) 0;
  border-bottom: 2px solid transparent;
  transition: all 0.2s ease;
}

.nav-main a:hover,
.nav-main a.active {
  color: var(--primary-blue);
  border-bottom-color: var(--primary-blue);
  text-decoration: none;
}

.nav-cta {
  display: flex;
  gap: var(--spacing-sm);
  margin-left: var(--spacing-lg);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-dark);
}

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

.btn-primary {
  background: var(--primary-blue);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-blue-dark);
  text-decoration: none;
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  background: var(--primary-blue);
  color: white;
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-accent {
  background: var(--accent-orange);
  color: white;
}

.btn-accent:hover {
  background: var(--accent-orange-dark);
  text-decoration: none;
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #0066cc 0%, #004c99 100%);
  color: white;
  padding: var(--spacing-3xl) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(255,255,255,0.03) 2px, rgba(255,255,255,0.03) 4px);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero h1 {
  color: white;
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  line-height: 1.1;
}

.hero p.lead {
  font-size: 1.25rem;
  color: rgba(255,255,255,0.9);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: rgba(255,255,255,0.15);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  margin-top: var(--spacing-md);
  backdrop-filter: blur(10px);
}

.trust-badge::before {
  content: '✓';
  font-weight: bold;
  font-size: 1.2rem;
}

/* Section Styles */
.section {
  padding: var(--spacing-3xl) 0;
}

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

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

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-xl);
}

.section-header h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.section-header p {
  font-size: 1.125rem;
  color: var(--text-medium);
}

/* Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.card {
  background: white;
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  border: 1px solid var(--border-light);
}

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

.card-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--primary-blue);
}

.card h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--text-dark);
}

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

/* Feature Highlights */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.feature {
  text-align: center;
}

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md);
  background: var(--primary-blue-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: white;
}

.feature h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.feature p {
  font-size: 0.95rem;
  color: var(--text-medium);
}

/* Comparison Table */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-xl) 0;
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.comparison-table th {
  background: var(--primary-blue);
  color: white;
  padding: var(--spacing-md);
  text-align: left;
  font-weight: 600;
}

.comparison-table td {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border-light);
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-table tr:nth-child(even) {
  background: var(--bg-lighter);
}

/* Client Logos */
.client-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
  opacity: 0.7;
}

.client-logos img {
  height: 60px;
  width: auto;
  filter: grayscale(100%);
  transition: all 0.3s ease;
}

.client-logos img:hover {
  filter: grayscale(0%);
  opacity: 1;
}

/* CTA Blocks */
.cta-blocks {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.cta-block {
  background: var(--bg-light);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  text-align: center;
  border: 2px solid var(--border-light);
  transition: all 0.3s ease;
}

.cta-block:hover {
  border-color: var(--primary-blue);
  box-shadow: var(--shadow-md);
}

.cta-block h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.cta-block p {
  margin-bottom: var(--spacing-lg);
}

/* Showcase Box (for NASA story) */
.showcase {
  background: linear-gradient(135deg, rgba(0,102,204,0.05) 0%, rgba(0,76,153,0.1) 100%);
  border: 2px solid var(--primary-blue-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.showcase-image {
  text-align: center;
}

.showcase-image img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.showcase-content h3 {
  color: var(--primary-blue);
  font-size: 1.75rem;
  margin-bottom: var(--spacing-md);
}

/* Service List */
.service-list {
  display: grid;
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.service-item {
  background: white;
  padding: var(--spacing-lg);
  border-left: 4px solid var(--primary-blue);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.service-item h3 {
  color: var(--primary-blue);
  margin-bottom: var(--spacing-sm);
}

.service-item ul {
  list-style: none;
  margin-top: var(--spacing-md);
}

.service-item li {
  padding-left: 1.5rem;
  position: relative;
  margin-bottom: var(--spacing-xs);
  color: var(--text-medium);
}

.service-item li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary-blue);
  font-weight: bold;
}

/* Contact Form */
.contact-form {
  max-width: 600px;
  margin: var(--spacing-xl) auto;
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  color: var(--text-dark);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--spacing-sm);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 1rem;
  transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(0,102,204,0.1);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

/* Footer */
.site-footer {
  background: var(--text-dark);
  color: rgba(255,255,255,0.8);
  padding: var(--spacing-xl) 0 var(--spacing-lg);
}

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

.footer-section h4 {
  color: white;
  margin-bottom: var(--spacing-md);
  font-size: 1.125rem;
}

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

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

.footer-section a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-section a:hover {
  color: white;
  text-decoration: none;
}

.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: rgba(255,255,255,0.6);
}

/* Documentation Styles */
.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-xl) 0;
}

.doc-card {
  background: white;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  transition: all 0.2s ease;
}

.doc-card:hover {
  border-color: var(--primary-blue);
  box-shadow: var(--shadow-md);
}

.doc-card h4 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-sm);
  color: var(--primary-blue);
}

.doc-card p {
  font-size: 0.875rem;
  color: var(--text-medium);
  margin-bottom: var(--spacing-sm);
}

.doc-card a {
  font-size: 0.875rem;
  font-weight: 600;
}

/* Responsive Design */
@media (max-width: 968px) {
  .nav-main {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .nav-main.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
  }

  .nav-cta {
    margin-left: 0;
    margin-top: var(--spacing-md);
    flex-direction: column;
  }

  .showcase {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .section-header h2 {
    font-size: 2rem;
  }
}

@media (max-width: 640px) {
  :root {
    --spacing-3xl: 3rem;
    --spacing-2xl: 2rem;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero p.lead {
    font-size: 1.125rem;
  }

  .hero-cta {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.25rem; }

  .cards-grid {
    grid-template-columns: 1fr;
  }
}

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

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.color-primary { color: var(--primary-blue); }
.color-accent { color: var(--accent-orange); }
.bg-light { background: var(--bg-light); }