/* Professional Enterprise Website Styles for FIRS E-Invoicing Proposal */

/* Root Variables */
:root {
  --primary-color: #4A90E2;
  --secondary-color: #357ABD;
  --accent-color: #2ECC40;
  --dark-color: #2C3E50;
  --light-gray: #F8F9FA;
  --medium-gray: #6C757D;
  --border-color: #DEE2E6;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --text-color: #333333;
  --white: #FFFFFF;
}

/* Global Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--white);
  font-size: 16px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  margin-bottom: 1rem;
  line-height: 1.3;
}

h1 {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 2rem;
  color: var(--dark-color);
  margin-bottom: 1.25rem;
}

h3 {
  font-size: 1.5rem;
  color: var(--secondary-color);
  margin-bottom: 1rem;
}

h4 {
  font-size: 1.25rem;
  color: var(--dark-color);
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1rem;
  color: var(--text-color);
}

.lead {
  font-size: 1.125rem;
  font-weight: 400;
  color: var(--medium-gray);
  margin-bottom: 2rem;
}

/* Navigation */
.navbar {
  background-color: var(--white);
  box-shadow: 0 2px 4px var(--shadow-color);
  padding: 1rem 0;
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color) !important;
}

.navbar-nav .nav-link {
  color: var(--dark-color) !important;
  font-weight: 500;
  padding: 0.5rem 1rem !important;
  margin: 0 0.25rem;
  border-radius: 4px;
  transition: all 0.3s ease;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
  background-color: var(--primary-color);
  color: var(--white) !important;
}

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: var(--white);
  padding: 4rem 0;
  margin-bottom: 3rem;
}

.hero-section h1 {
  color: var(--white);
  font-size: 3rem;
  margin-bottom: 1rem;
}

.hero-section .lead {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.25rem;
}

/* Main Content */
.main-content {
  min-height: calc(100vh - 200px);
  padding: 2rem 0;
}

/* Cards and Sections */
.content-section {
  background-color: var(--white);
  border-radius: 8px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 6px var(--shadow-color);
  border: 1px solid var(--border-color);
}

.section-header {
  border-bottom: 3px solid var(--primary-color);
  padding-bottom: 1rem;
  margin-bottom: 2rem;
}

.section-header h2 {
  margin-bottom: 0.5rem;
}

.section-header .section-subtitle {
  color: var(--medium-gray);
  font-size: 1.1rem;
  margin-bottom: 0;
}

/* Feature Cards */
.feature-card {
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition: all 0.3s ease;
  height: 100%;
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 12px var(--shadow-color);
  border-color: var(--primary-color);
}

.feature-card h4 {
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.feature-card .card-icon {
  font-size: 2.5rem;
  color: var(--accent-color);
  margin-bottom: 1rem;
  display: block;
}

/* Diagram Container */
.diagram-container {
  background-color: var(--light-gray);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 2rem;
  margin: 2rem 0;
  text-align: center;
}

.diagram-container img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  box-shadow: 0 4px 8px var(--shadow-color);
}

.diagram-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--dark-color);
  margin-bottom: 1rem;
}

.diagram-description {
  color: var(--medium-gray);
  font-size: 0.95rem;
  margin-top: 1rem;
}

/* Benefits and Features Lists */
.benefits-list {
  list-style: none;
  padding: 0;
}

.benefits-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-color);
  position: relative;
  padding-left: 2rem;
}

.benefits-list li:last-child {
  border-bottom: none;
}

.benefits-list li:before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent-color);
  font-weight: bold;
  font-size: 1.2rem;
}

/* Key Points */
.key-points {
  background-color: var(--light-gray);
  border-left: 4px solid var(--primary-color);
  padding: 1.5rem;
  margin: 2rem 0;
}

.key-points h4 {
  color: var(--primary-color);
  margin-bottom: 1rem;
}

/* Statistics and Metrics */
.stat-card {
  background-color: var(--primary-color);
  color: var(--white);
  border-radius: 8px;
  padding: 2rem;
  text-align: center;
  margin-bottom: 1rem;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  display: block;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 1rem;
  opacity: 0.9;
}

/* Call to Action */
.cta-section {
  background: linear-gradient(135deg, var(--accent-color) 0%, #27AE60 100%);
  color: var(--white);
  border-radius: 8px;
  padding: 2rem;
  text-align: center;
  margin: 3rem 0;
}

.cta-section h3 {
  color: var(--white);
  margin-bottom: 1rem;
}

.btn-cta {
  background-color: var(--white);
  color: var(--accent-color);
  border: none;
  padding: 0.75rem 2rem;
  border-radius: 4px;
  font-weight: 600;
  text-decoration: none;
  display: inline-block;
  transition: all 0.3s ease;
}

.btn-cta:hover {
  background-color: var(--light-gray);
  text-decoration: none;
  color: var(--accent-color);
  transform: translateY(-1px);
}

/* Footer */
.footer {
  background-color: var(--dark-color);
  color: var(--white);
  padding: 2rem 0;
  margin-top: 3rem;
}

.footer p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.8);
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero-section h1 {
    font-size: 2rem;
  }
  
  .hero-section .lead {
    font-size: 1.1rem;
  }
  
  .content-section {
    padding: 1.5rem;
  }
  
  .feature-card {
    margin-bottom: 1rem;
  }
  
  .stat-number {
    font-size: 2rem;
  }
}

@media (max-width: 576px) {
  .hero-section {
    padding: 3rem 0;
  }
  
  .hero-section h1 {
    font-size: 1.75rem;
  }
  
  .content-section {
    padding: 1rem;
  }
  
  .diagram-container {
    padding: 1rem;
  }
}

/* Print Styles */
@media print {
  .navbar,
  .footer,
  .btn,
  .cta-section {
    display: none !important;
  }
  
  .hero-section {
    background: none !important;
    color: var(--text-color) !important;
  }
  
  .hero-section h1 {
    color: var(--text-color) !important;
  }
  
  .content-section {
    box-shadow: none;
    border: 1px solid var(--border-color);
  }
}

/* Utility Classes */
.text-primary {
  color: var(--primary-color) !important;
}

.text-secondary {
  color: var(--secondary-color) !important;
}

.text-accent {
  color: var(--accent-color) !important;
}

.bg-light-custom {
  background-color: var(--light-gray) !important;
}

.border-primary {
  border-color: var(--primary-color) !important;
}

.shadow-custom {
  box-shadow: 0 4px 6px var(--shadow-color) !important;
}

.rounded-custom {
  border-radius: 8px !important;
}