* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #f4f7fb;
  color: #1f2933;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 8%;
  background: #0f172a;
  color: white;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: white;
  text-decoration: none;
  font-size: 1.2rem;
  font-weight: bold;
}

.logo {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: #38bdf8;
  color: #0f172a;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
}

nav {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

nav a {
  color: white;
  text-decoration: none;
  transition: color .2s ease;
}

nav a:hover,
nav a:focus {
  color: #93c5fd;
}

nav a.active {
  color: #38bdf8;
}

.hero {
  text-align: center;
  padding: 80px 12%;
  background: linear-gradient(135deg,#1e3a8a,#0f172a);
  color: white;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: 2.5rem;
}

.hero p {
  max-width: 720px;
  margin: 0 auto;
  line-height: 1.7;
}

.about-card {
  max-width: 900px;
  margin: 50px auto;
  padding: 40px;
  background: white;
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(15,23,42,.08);
}

.about-card h2 {
  margin-top: 0;
}

.about-card p {
  line-height: 1.8;
  margin-bottom: 20px;
}

footer {
  text-align: center;
  padding: 22px;
  background: #0f172a;
  color: white;
}

@media (max-width:900px){
  .navbar{
    flex-direction:column;
    gap:18px;
  }
  nav{
    justify-content:center;
  }
}

@media (max-width:600px){
  .hero{
    padding:60px 8%;
  }
  .hero h1{
    font-size:2rem;
  }
  nav{
    flex-direction:column;
    gap:12px;
  }
  .about-card{
    margin:32px 16px;
    padding:24px;
  }
}