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

body {
  font-family: Arial, Helvetica, sans-serif;
  color: #1a1a1a;
  background: #ffffff;
  line-height: 1.7;
}

.top-bar {
  background: #1e3a8a;
  color: white;
  padding: 12px 0;
  text-align: center;
  font-size: 14px;
}

.navbar {
  background: white;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  padding: 18px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 25px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: #1e3a8a;
}

.brand img {
  width: 48px;
  height: 48px;
  border-radius: 10px;
}

.brand-name {
  font-size: 28px;
  font-weight: 800;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 35px;
}

.nav-links a {
  color: #1a1a1a;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  transition: color 0.3s;
}

.nav-links a:hover {
  color: #1e3a8a;
}

.banner {
  background: linear-gradient(to right, #1e3a8a, #3b82f6);
  color: white;
  padding: 100px 25px;
  text-align: center;
}

.banner h1 {
  font-size: 52px;
  margin-bottom: 25px;
  font-weight: 900;
}

.banner-text {
  font-size: 22px;
  margin-bottom: 35px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.btn-primary {
  background: white;
  color: #1e3a8a;
  padding: 18px 45px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  display: inline-block;
  font-size: 17px;
  transition: transform 0.3s;
}

.btn-primary:hover {
  transform: scale(1.05);
}

.content-section {
  padding: 90px 25px;
  max-width: 1300px;
  margin: 0 auto;
}

.title-main {
  font-size: 40px;
  text-align: center;
  margin-bottom: 60px;
  color: #1a1a1a;
  font-weight: 800;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 35px;
}

.card {
  background: #f8fafc;
  padding: 40px;
  border-radius: 12px;
  border: 2px solid #e5e7eb;
  transition: all 0.3s;
}

.card:hover {
  border-color: #1e3a8a;
  box-shadow: 0 8px 20px rgba(30,58,138,0.15);
}

.card-icon {
  font-size: 45px;
  margin-bottom: 18px;
}

.card h3 {
  font-size: 24px;
  margin-bottom: 15px;
  color: #1e3a8a;
}

.card p {
  color: #4b5563;
  line-height: 1.8;
}

.pairs-section {
  background: #f8fafc;
}

.pair-box {
  background: white;
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  border: 1px solid #e5e7eb;
  transition: transform 0.3s;
}

.pair-box:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 15px rgba(0,0,0,0.1);
}

.pair-box h4 {
  font-size: 22px;
  color: #1e3a8a;
  margin-bottom: 12px;
}

.pair-box p {
  color: #6b7280;
  font-size: 15px;
}

.footer {
  background: #1a1a1a;
  color: white;
  padding: 60px 25px 25px;
}

.footer-content {
  max-width: 1300px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 40px;
  margin-bottom: 35px;
}

.footer h4 {
  margin-bottom: 18px;
  font-size: 19px;
}

.footer ul {
  list-style: none;
}

.footer ul li {
  margin-bottom: 12px;
}

.footer a {
  color: #9ca3af;
  text-decoration: none;
  transition: color 0.3s;
}

.footer a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: 25px;
  border-top: 1px solid #374151;
  color: #9ca3af;
  max-width: 1300px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .banner h1 {
    font-size: 36px;
  }
  
  .nav-links {
    flex-direction: column;
    gap: 15px;
  }
}