/* ==========================================================================
   Design System & Variables
   ========================================================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;800&family=Roboto:wght@300;400;500&display=swap');

:root {
  /* Colors */
  --primary: #0f4c5c;
  --secondary: #e36414;
  --accent: #00b4d8;
  --bg-color: #f8f9fa;
  --text-dark: #212529;
  --text-light: #6c757d;
  --white: #ffffff;
  
  /* Gradients */
  --grad-primary: linear-gradient(135deg, var(--primary) 0%, #06313d 100%);
  --grad-accent: linear-gradient(135deg, var(--accent) 0%, #0077b6 100%);
  --grad-warm: linear-gradient(135deg, var(--secondary) 0%, #fb8500 100%);
  
  /* Typography */
  --font-heading: 'Inter', sans-serif;
  --font-body: 'Roboto', sans-serif;
  
  /* Shadows & Glassmorphism */
  --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: 1px solid rgba(255, 255, 255, 0.3);
  --glass-blur: blur(12px);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--text-dark);
  background-color: var(--bg-color);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 800;
  line-height: 1.2;
  color: var(--primary);
  margin-bottom: 1rem;
}

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

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

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

/* ==========================================================================
   Layout Utilities
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 5rem 0;
}

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

.grid {
  display: grid;
  gap: 2rem;
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }

.text-center { text-align: center; }
.mb-2 { margin-bottom: 2rem; }
.mt-2 { margin-top: 2rem; }
.py-3 { padding-top: 3rem; padding-bottom: 3rem; }

/* ==========================================================================
   Components
   ========================================================================== */
/* Buttons */
.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  border-radius: 50px;
  font-family: var(--font-heading);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  box-shadow: var(--shadow-sm);
}

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

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  color: var(--white);
}

.btn-secondary {
  background: var(--grad-warm);
  color: var(--white);
}

.btn-secondary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  color: var(--white);
}

/* Navigation (Glassmorphism) */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: var(--glass-border);
  transition: all var(--transition-normal);
  padding: 1rem 0;
}

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

.navbar-brand img {
  height: 50px;
  transition: transform var(--transition-fast);
}

.navbar-brand:hover img {
  transform: scale(1.05);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  align-items: center;
}

.nav-links a {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--primary);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--accent);
  transition: width var(--transition-fast);
}

.nav-links a:hover::after {
  width: 100%;
}

.mobile-menu-btn {
  display: none;
  font-size: 1.5rem;
  color: var(--primary);
  background: none;
  border: none;
  cursor: pointer;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  margin-top: 70px; /* Offset for navbar */
  overflow: hidden;
  background-color: var(--primary);
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  color: var(--white);
  max-width: 800px;
}

.hero-content h1 {
  color: var(--white);
  font-size: 4rem;
  margin-bottom: 1.5rem;
  animation: fadeInUp 1s ease forwards;
}

.hero-content p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.9;
  animation: fadeInUp 1s ease 0.2s forwards;
  opacity: 0;
}

.hero-content .btn {
  animation: fadeInUp 1s ease 0.4s forwards;
  opacity: 0;
}

/* Cards (Glassmorphism) */
.card {
  background: var(--white);
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  border: 1px solid rgba(0,0,0,0.05);
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.card-icon {
  font-size: 2.5rem;
  color: var(--secondary);
  margin-bottom: 1.5rem;
}

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 12px;
  margin-bottom: 1.5rem;
}

/* Footer */
.footer {
  background: var(--primary);
  color: var(--white);
  padding: 4rem 0 2rem;
  margin-top: 4rem;
}

.footer h3 {
  color: var(--white);
  margin-bottom: 1.5rem;
}

.footer p {
  color: rgba(255,255,255,0.7);
  margin-bottom: 0.5rem;
}

.footer-bottom {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  color: rgba(255,255,255,0.5);
  font-size: 0.9rem;
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 768px) {
  .hero-content h1 {
    font-size: 2.5rem;
  }
  
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--white);
    flex-direction: column;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transform: translateY(-150%);
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: -1;
  }
  
  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
  }
  
  .mobile-menu-btn {
    display: block;
  }
}