:root {
  --primary-blue: #0A2540;
  --secondary-blue: #0077CC;
  --accent-green: #20C20E;
  --light-grey: #F3F5F9;
  --dark-grey: #4A5568;
  --white: #FFFFFF;
  --text-dark: #1A202C;
  --transition: all 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', 'Roboto', sans-serif;
}

body {
  background-color: var(--light-grey);
  color: var(--text-dark);
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--primary-blue);
  margin-bottom: 1rem;
}

a {
  text-decoration: none;
  color: var(--secondary-blue);
  transition: var(--transition);
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header & Navbar */
header {
  background-color: var(--white);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: var(--transition);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.logo {
  display: flex;
  align-items: center;
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary-blue);
}

.header-logo {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  object-fit: cover;
  margin-right: 10px;
}

.logo span {
  color: var(--accent-green);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 25px;
}

.nav-links li a {
  color: var(--text-dark);
  font-weight: 600;
  position: relative;
}

.nav-links li a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -5px;
  left: 0;
  background-color: var(--accent-green);
  transition: var(--transition);
}

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

.btn-cta {
  background-color: var(--secondary-blue);
  color: var(--white) !important;
  padding: 10px 20px;
  border-radius: 5px;
  font-weight: 600;
}

.btn-cta:hover {
  background-color: var(--primary-blue);
  color: var(--white) !important;
}

/* Hero Section */
.hero {
  height: 80vh;
  background: linear-gradient(rgba(10, 37, 64, 0.8), rgba(10, 37, 64, 0.8)), url('assets/images/hero_bg.jpg') center/cover;
  display: flex;
  align-items: center;
  text-align: center;
  color: var(--white);
}

.hero h1 {
  color: var(--white);
  font-size: 3.5rem;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 30px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero-btns .btn-primary {
  background-color: var(--accent-green);
  color: var(--white);
  padding: 15px 30px;
  border-radius: 5px;
  font-size: 1.1rem;
  font-weight: bold;
  margin: 0 10px;
}
.hero-btns .btn-primary:hover {
  background-color: #1aa30b;
}

.hero-btns .btn-secondary {
  background-color: transparent;
  border: 2px solid var(--white);
  color: var(--white);
  padding: 13px 30px;
  border-radius: 5px;
  font-size: 1.1rem;
  font-weight: bold;
  margin: 0 10px;
}
.hero-btns .btn-secondary:hover {
  background-color: var(--white);
  color: var(--primary-blue);
}

/* Sections */
section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 50px;
}

/* Cards / Grids */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.card {
  background-color: var(--white);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-content {
  padding: 25px;
}

.card-content h3 {
  margin-bottom: 15px;
}

/* Zig-Zag Layout */
.zig-zag-item {
  display: flex;
  align-items: center;
  gap: 40px;
  margin-bottom: 60px;
  background: var(--white);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.zig-zag-item:nth-child(even) {
  flex-direction: row-reverse;
}

.zig-zag-image {
  flex: 1;
}

.zig-zag-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  min-height: 300px;
}

.zig-zag-text {
  flex: 1;
  padding: 40px;
}

.zig-zag-text h3 {
  margin-bottom: 15px;
  font-size: 1.8rem;
}

/* About Preview */
.about-preview {
  display: flex;
  align-items: center;
  gap: 50px;
}
.about-text, .about-image {
  flex: 1;
}
.about-image img {
  width: 100%;
  border-radius: 10px;
}

/* Contact Form */
.contact-section {
  background-color: var(--white);
}
.form-container {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--light-grey);
  padding: 40px;
  border-radius: 10px;
}
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
}
.form-control {
  width: 100%;
  padding: 12px;
  border: 1px solid #ccc;
  border-radius: 5px;
  font-size: 1rem;
}
.form-control:focus {
  outline: none;
  border-color: var(--secondary-blue);
}
.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.checkbox-group input {
  margin-top: 5px;
}
.checkbox-group label {
  font-weight: 400;
  font-size: 0.9rem;
}
.submit-btn {
  background-color: var(--primary-blue);
  color: var(--white);
  padding: 15px 30px;
  border: none;
  border-radius: 5px;
  font-size: 1.1rem;
  cursor: pointer;
  width: 100%;
  transition: var(--transition);
}
.submit-btn:hover {
  background-color: var(--secondary-blue);
}

/* Footer */
footer {
  background-color: var(--primary-blue);
  color: var(--white);
  padding: 60px 0 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h3 {
  color: var(--white);
  margin-bottom: 20px;
}

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

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col a {
  color: #ccc;
}

.footer-col a:hover {
  color: var(--accent-green);
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
  color: #ccc;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .about-preview {
    flex-direction: column;
  }
  .hero h1 {
    font-size: 2.5rem;
  }
}