/* ===================================
   DICE GovBid Website - Main Styles
   =================================== */

/* CSS Variables for Colors and Spacing */
:root {
  /* Colors */
  --primary-navy: #1e3a5f;
  --primary-dark: #0f1f3a;
  --accent-teal: #14b8a6;
  --accent-teal-dark: #0d9488;
  --light-gray: #f8f9fa;
  --medium-gray: #e9ecef;
  --text-dark: #212529;
  --text-medium: #495057;
  --text-light: #6c757d;
  --white: #ffffff;
  --success: #28a745;
  --error: #dc3545;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.6;
  
  /* Layout */
  --container-max-width: 1200px;
  --border-radius: 8px;
  --transition-speed: 0.3s;
}

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

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

body {
  font-family: var(--font-primary);
  line-height: var(--line-height-base);
  color: var(--text-dark);
  background-color: var(--white);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--primary-navy);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

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

a {
  color: var(--accent-teal);
  text-decoration: none;
  transition: color var(--transition-speed);
}

a:hover {
  color: var(--accent-teal-dark);
}

/* Container */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Navigation */
.navbar {
  background-color: var(--primary-navy);
  padding: var(--spacing-sm) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.navbar-brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
  text-decoration: none;
}

.navbar-brand:hover {
  color: var(--accent-teal);
}

.navbar-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  align-items: center;
}

.navbar-menu a {
  color: var(--white);
  font-weight: 500;
  transition: color var(--transition-speed);
}

.navbar-menu a:hover {
  color: var(--accent-teal);
}

.navbar-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .navbar-toggle {
    display: block;
  }
  
  .navbar-menu {
    position: fixed;
    top: 60px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 60px);
    background-color: var(--primary-navy);
    flex-direction: column;
    padding: var(--spacing-xl);
    gap: var(--spacing-md);
    transition: left var(--transition-speed);
  }
  
  .navbar-menu.active {
    left: 0;
  }
}

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

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

.btn-primary:hover {
  background-color: var(--accent-teal-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(20, 184, 166, 0.3);
}

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

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

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

.btn-outline:hover {
  background-color: var(--accent-teal);
  color: var(--white);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-dark) 100%);
  color: var(--white);
  padding: var(--spacing-xxl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.03)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
  opacity: 0.5;
}

.hero .container {
  position: relative;
  z-index: 1;
}

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

.hero p {
  font-size: 1.25rem;
  color: rgba(255,255,255,0.9);
  margin-bottom: var(--spacing-xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

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

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

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

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

.section-subtitle {
  text-align: center;
  font-size: 1.125rem;
  color: var(--text-medium);
  max-width: 800px;
  margin: 0 auto var(--spacing-xl);
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.card {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

.card-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--accent-teal), var(--accent-teal-dark));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  font-size: 1.5rem;
  color: var(--white);
}

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

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

/* Service Cards */
.service-card {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  border-left: 4px solid var(--accent-teal);
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

.service-card h3 {
  color: var(--primary-navy);
  margin-bottom: var(--spacing-md);
}

.service-card h4 {
  color: var(--text-dark);
  font-size: 1.125rem;
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.service-card ul {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-lg);
}

.service-card li {
  margin-bottom: var(--spacing-xs);
  color: var(--text-medium);
}

/* Process Steps */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.process-step {
  text-align: center;
  padding: var(--spacing-lg);
}

.step-number {
  width: 60px;
  height: 60px;
  background: var(--accent-teal);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto var(--spacing-md);
}

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

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

.testimonial {
  background: var(--white);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
  border-top: 3px solid var(--accent-teal);
}

.testimonial-text {
  font-style: italic;
  color: var(--text-medium);
  margin-bottom: var(--spacing-md);
  line-height: 1.8;
}

.testimonial-author {
  font-weight: 600;
  color: var(--text-dark);
}

/* CTA Banner */
.cta-banner {
  background: linear-gradient(135deg, var(--primary-navy), var(--primary-dark));
  color: var(--white);
  padding: var(--spacing-xxl) var(--spacing-lg);
  text-align: center;
  border-radius: var(--border-radius);
  margin: var(--spacing-xxl) 0;
}

.cta-banner h2 {
  color: var(--white);
  margin-bottom: var(--spacing-md);
}

.cta-banner p {
  color: rgba(255,255,255,0.9);
  font-size: 1.125rem;
  margin-bottom: var(--spacing-lg);
}

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

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

.form-label .required {
  color: var(--error);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--medium-gray);
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-family: var(--font-primary);
  transition: border-color var(--transition-speed);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-teal);
  box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.1);
}

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

.form-radio-group {
  display: flex;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xs);
}

.form-radio-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  cursor: pointer;
}

.form-error {
  color: var(--error);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
  display: none;
}

.form-error.active {
  display: block;
}

.form-success {
  background-color: #d4edda;
  border: 1px solid #c3e6cb;
  color: #155724;
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
  display: none;
}

.form-success.active {
  display: block;
}

/* Table */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-xl) 0;
  background: var(--white);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

.comparison-table th,
.comparison-table td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--medium-gray);
}

.comparison-table th {
  background-color: var(--primary-navy);
  color: var(--white);
  font-weight: 600;
}

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

.comparison-table tr:hover {
  background-color: var(--light-gray);
}

/* Footer */
.footer {
  background-color: var(--primary-navy);
  color: var(--white);
  padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

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

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

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

.footer-section a {
  color: rgba(255,255,255,0.8);
  transition: color var(--transition-speed);
}

.footer-section a:hover {
  color: var(--accent-teal);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--spacing-md);
  text-align: center;
  color: rgba(255,255,255,0.7);
  font-size: 0.875rem;
}

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

.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-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); }

/* Responsive Typography */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.5rem; }
  
  .hero h1 { font-size: 2.25rem; }
  .hero p { font-size: 1.125rem; }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 300px;
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-base: 14px;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .section {
    padding: var(--spacing-lg) 0;
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}