/* Base Styles */
:root {
  --navy-blue: #1a5f7a;
  --teal-blue: #57c4c6;
  --light-blue: #e8f4f5;
  --dark-gray: #333333;
  --medium-gray: #666666;
  --light-gray: #f5f5f5;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
}

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

body {
  font-family: 'Open Sans', sans-serif;
  color: var(--dark-gray);
  line-height: 1.6;
  background-color: var(--light-gray);
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--navy-blue);
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--teal-blue);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--navy-blue);
}

ul, ol {
  margin-bottom: 1rem;
}

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

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Row and Column System */
.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -1rem;
}

.col {
  padding: 0 1rem;
  width: 100%;
}

/* Header */
.header {
  background-color: white;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
}

.logo img {
  height: 40px;
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
}

.nav-menu li {
  margin-left: 1.5rem;
}

.nav-menu a {
  color: var(--dark-gray);
  font-weight: 600;
  padding: 0.5rem 0;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--teal-blue);
  transition: width 0.3s ease;
}

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

.nav-menu a.active {
  color: var(--teal-blue);
}

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

/* Page Header */
.page-header {
  background-color: var(--navy-blue);
  color: white;
  padding: 3rem 0;
  text-align: center;
}

.page-header h1 {
  color: white;
  margin-bottom: 0.5rem;
}

.page-header p {
  font-size: 1.2rem;
  opacity: 0.9;
  margin-bottom: 0;
}

/* Footer */
.footer {
  background-color: var(--navy-blue);
  color: white;
  padding: 3rem 0 1rem;
}

.footer h4 {
  color: white;
  margin-bottom: 1.5rem;
}

.footer p {
  opacity: 0.8;
}

.footer-logo img {
  height: 40px;
  margin-bottom: 1rem;
}

.footer-nav {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-nav li {
  margin-bottom: 0.5rem;
}

.footer-nav a {
  color: white;
  opacity: 0.8;
  transition: opacity 0.3s ease;
}

.footer-nav a:hover {
  opacity: 1;
}

.social-links {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
}

.social-links li {
  margin-right: 1rem;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: white;
  transition: background-color 0.3s ease;
}

.social-links a:hover {
  background-color: var(--teal-blue);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.5rem;
  margin-top: 2rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}

.footer-bottom p {
  margin-bottom: 1rem;
}

.footer-bottom a {
  color: white;
  opacity: 0.8;
}

.footer-bottom a:hover {
  opacity: 1;
}

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

.mb-4 {
  margin-bottom: 1.5rem;
}

.mb-5 {
  margin-bottom: 3rem;
}

/* Responsive Styles */
@media (min-width: 576px) {
  .col-sm-6 {
    width: 50%;
  }
}

@media (min-width: 768px) {
  .col-md-4 {
    width: 33.333333%;
  }
  
  .col-md-6 {
    width: 50%;
  }
  
  .col-md-8 {
    width: 66.666667%;
  }
}

@media (min-width: 992px) {
  .col-lg-2 {
    width: 16.666667%;
  }
  
  .col-lg-3 {
    width: 25%;
  }
  
  .col-lg-4 {
    width: 33.333333%;
  }
  
  .col-lg-6 {
    width: 50%;
  }
  
  .col-lg-8 {
    width: 66.666667%;
  }
  
  .col-lg-9 {
    width: 75%;
  }
}

@media (max-width: 991px) {
  h1 {
    font-size: 2.2rem;
  }
  
  h2 {
    font-size: 1.8rem;
  }
}

@media (max-width: 767px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: white;
    flex-direction: column;
    padding: 1rem;
    box-shadow: var(--shadow-md);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .nav-menu li {
    margin: 0.5rem 0;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 575px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.6rem;
  }
  
  .page-header {
    padding: 2rem 0;
  }
}