body {
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #232f3e, #37475a);
  color: #fff;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 30px 20px;
}

.logo {
  width: 200px;
  margin: 0 auto 20px;
  display: block;
}

header {
  text-align: center;
}

header h1 {
  font-size: 2.5rem;
  color: #ff9900;
  margin-bottom: 10px;
}

header p {
  font-size: 1.2rem;
  color: #dddddd;
}

main .card {
  background: #1f2937;
  border-radius: 15px;
  padding: 25px;
  margin-top: 40px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  text-align: center;
}

.card h2 {
  color: #ff9900;
}

.card a {
  display: inline-block;
  margin-top: 15px;
  text-decoration: none;
  color: #00aaff;
  font-weight: bold;
}

footer {
  text-align: center;
  margin-top: 50px;
  font-size: 0.9rem;
  color: #999;
}