/* ============================================================================
   Odessa Geo Website - Main Stylesheet
   Geophysical Services LLC - Professional Services Website
   ============================================================================ */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Variables)
   -------------------------------------------------------------------------- */
:root {
  /* Primary Colors - Deep earth tones for geophysical theme */
  --primary-dark: #1a2f4a;       /* Deep navy - professionalism */
  --primary: #2c5282;            /* Strong blue - trust */
  --primary-light: #4299e1;      /* Bright blue - accents */
  
  /* Secondary Colors - Earth/geological tones */
  --secondary-dark: #744210;     /* Deep earth brown */
  --secondary: #c05621;          /* Burnt orange - energy */
  --secondary-light: #ed8936;    /* Bright orange - CTAs */
  
  /* Neutral Colors */
  --text-dark: #1a202c;          /* Near black for headings */
  --text-body: #2d3748;          /* Dark gray for body text */
  --text-muted: #718096;         /* Muted gray for secondary text */
  --text-light: #a0aec0;         /* Light gray */
  
  /* Background Colors */
  --bg-dark: #1a202c;            /* Dark sections */
  --bg-medium: #2d3748;          /* Medium dark */
  --bg-light: #f7fafc;           /* Light gray backgrounds */
  --bg-white: #ffffff;           /* Pure white */
  
  /* Accent Colors */
  --success: #38a169;            /* Green for success states */
  --warning: #d69e2e;            /* Yellow for warnings */
  --error: #e53e3e;              /* Red for errors */
  
  /* Typography */
  --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  
  /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  
  /* Container widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-body);
  background-color: var(--bg-white);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-dark);
  margin-bottom: var(--spacing-md);
}

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);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

/* --------------------------------------------------------------------------
   Utility Classes
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-muted { color: var(--text-muted); }
.text-white { color: var(--bg-white); }

.bg-primary { background-color: var(--primary); }
.bg-dark { background-color: var(--bg-dark); }
.bg-light { background-color: var(--bg-light); }

.section-padding {
  padding: var(--spacing-3xl) 0;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-align: center;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn-primary {
  background-color: var(--secondary);
  color: var(--bg-white);
  border-color: var(--secondary);
}

.btn-primary:hover {
  background-color: var(--secondary-light);
  border-color: var(--secondary-light);
  color: var(--bg-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background-color: transparent;
  color: var(--bg-white);
  border-color: var(--bg-white);
}

.btn-outline:hover {
  background-color: var(--bg-white);
  color: var(--primary-dark);
}

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

/* --------------------------------------------------------------------------
   Header & Navigation
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: transparent;
  transition: all var(--transition-base);
}

.header.scrolled {
  background-color: var(--bg-white);
  box-shadow: var(--shadow-md);
}

.header.scrolled .nav-link {
  color: var(--text-dark);
}

.header.scrolled .nav-link:hover {
  color: var(--primary);
}

.header.scrolled .logo-text {
  color: var(--primary-dark);
}

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

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

.logo-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bg-white);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--bg-white);
  transition: color var(--transition-base);
}

.logo-text span {
  color: var(--secondary-light);
}

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

.nav-link {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--bg-white);
  padding: var(--spacing-sm) 0;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--secondary-light);
  transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link:hover {
  color: var(--secondary-light);
}

/* Mobile Menu Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--bg-white);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.header.scrolled .nav-toggle span {
  background-color: var(--text-dark);
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--secondary-dark) 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 150px;
  background: linear-gradient(to top, var(--bg-white), transparent);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--bg-white);
  max-width: 900px;
  padding: var(--spacing-xl);
}

.hero-subtitle {
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--secondary-light);
  margin-bottom: var(--spacing-md);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--bg-white);
  margin-bottom: var(--spacing-lg);
  line-height: 1.1;
}

.hero-title span {
  color: var(--secondary-light);
}

.hero-description {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Wave decoration */
.hero-wave {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100px;
  z-index: 2;
}

.hero-wave svg {
  width: 100%;
  height: 100%;
}

/* --------------------------------------------------------------------------
   Services Section
   -------------------------------------------------------------------------- */
.services {
  background-color: var(--bg-white);
  padding: var(--spacing-3xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-label {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--secondary);
  margin-bottom: var(--spacing-sm);
}

.section-title {
  font-size: 2.5rem;
  color: var(--text-dark);
  margin-bottom: var(--spacing-md);
}

.section-description {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.service-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.service-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
}

.service-icon svg {
  width: 32px;
  height: 32px;
  color: var(--bg-white);
}

.service-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
}

.service-description {
  color: var(--text-muted);
  margin-bottom: var(--spacing-lg);
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 600;
  color: var(--primary);
}

.service-link:hover {
  color: var(--secondary);
}

.service-link svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.service-link:hover svg {
  transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   About Section
   -------------------------------------------------------------------------- */
.about {
  background-color: var(--bg-light);
  padding: var(--spacing-3xl) 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.about-content h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
}

.about-content p {
  color: var(--text-muted);
  margin-bottom: var(--spacing-lg);
  font-size: 1.125rem;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.about-feature {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.about-feature-icon {
  width: 48px;
  height: 48px;
  background-color: var(--primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.about-feature-icon svg {
  width: 24px;
  height: 24px;
  color: var(--bg-white);
}

.about-feature h4 {
  font-size: 1rem;
  margin-bottom: var(--spacing-xs);
}

.about-feature p {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

.about-image {
  position: relative;
}

.about-image-main {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  width: 100%;
  height: 500px;
  object-fit: cover;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
}

.about-stats {
  position: absolute;
  bottom: -30px;
  right: -30px;
  background: var(--bg-white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  font-family: var(--font-heading);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --------------------------------------------------------------------------
   Stats Bar
   -------------------------------------------------------------------------- */
.stats-bar {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  padding: var(--spacing-2xl) 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
  text-align: center;
}

.stats-item {
  color: var(--bg-white);
}

.stats-number {
  font-size: 3rem;
  font-weight: 800;
  font-family: var(--font-heading);
  margin-bottom: var(--spacing-sm);
}

.stats-label {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.8;
}

/* --------------------------------------------------------------------------
   Contact Section
   -------------------------------------------------------------------------- */
.contact {
  padding: var(--spacing-3xl) 0;
  background-color: var(--bg-white);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
}

.contact-info h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
}

.contact-info > p {
  color: var(--text-muted);
  font-size: 1.125rem;
  margin-bottom: var(--spacing-xl);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.contact-icon {
  width: 48px;
  height: 48px;
  background-color: var(--bg-light);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-icon svg {
  width: 24px;
  height: 24px;
  color: var(--primary);
}

.contact-item h4 {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: var(--spacing-xs);
}

.contact-item p, .contact-item a {
  font-size: 1.125rem;
  color: var(--text-dark);
  margin-bottom: 0;
}

.contact-item a:hover {
  color: var(--primary);
}

/* Contact Form */
.contact-form-wrapper {
  background: var(--bg-light);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-dark);
}

.form-group input,
.form-group textarea,
.form-group select {
  padding: var(--spacing-md);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: var(--font-body);
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(44, 82, 130, 0.1);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  background-color: var(--bg-dark);
  color: var(--bg-white);
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-brand .logo-text {
  margin-bottom: var(--spacing-md);
}

.footer-brand p {
  color: var(--text-light);
  margin-bottom: var(--spacing-lg);
  max-width: 300px;
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
}

.social-link {
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.social-link:hover {
  background-color: var(--secondary);
}

.social-link svg {
  width: 20px;
  height: 20px;
  color: var(--bg-white);
}

.footer-column h4 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--bg-white);
  margin-bottom: var(--spacing-lg);
}

.footer-column ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-column a {
  color: var(--text-light);
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

.footer-column a:hover {
  color: var(--secondary-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-bottom p {
  color: var(--text-light);
  font-size: 0.875rem;
  margin-bottom: 0;
}

.footer-legal {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-legal a {
  color: var(--text-light);
  font-size: 0.875rem;
}

.footer-legal a:hover {
  color: var(--secondary-light);
}

/* --------------------------------------------------------------------------
   Page Header (for inner pages)
   -------------------------------------------------------------------------- */
.page-header {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  padding: 150px 0 80px;
  text-align: center;
  color: var(--bg-white);
}

.page-header h1 {
  color: var(--bg-white);
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.page-header p {
  font-size: 1.25rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
  font-size: 0.875rem;
}

.breadcrumb a {
  color: var(--secondary-light);
}

.breadcrumb span {
  opacity: 0.6;
}

/* --------------------------------------------------------------------------
   404 Page
   -------------------------------------------------------------------------- */
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  text-align: center;
  color: var(--bg-white);
}

.error-content h1 {
  font-size: 8rem;
  color: var(--secondary-light);
  margin-bottom: 0;
}

.error-content h2 {
  font-size: 2rem;
  color: var(--bg-white);
  margin-bottom: var(--spacing-lg);
}

.error-content p {
  font-size: 1.25rem;
  opacity: 0.8;
  margin-bottom: var(--spacing-xl);
}

/* --------------------------------------------------------------------------
   Responsive Styles
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .about-image {
    order: -1;
  }
  
  .about-stats {
    right: 0;
    bottom: -20px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  h1, .hero-title { font-size: 2.5rem; }
  h2, .section-title { font-size: 2rem; }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-white);
    flex-direction: column;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    gap: var(--spacing-md);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .nav-menu .nav-link {
    color: var(--text-dark);
    padding: var(--spacing-md);
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .about-features {
    grid-template-columns: 1fr;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-brand p {
    margin-left: auto;
    margin-right: auto;
  }
  
  .social-links {
    justify-content: center;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .page-header h1 {
    font-size: 2.5rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  
  h1, .hero-title { font-size: 2rem; }
  
  .stats-number {
    font-size: 2rem;
  }
  
  .error-content h1 {
    font-size: 5rem;
  }
}