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

body {
  font-family: Arial, sans-serif;
  background: #f5f7fb;
  color: #172033;
  line-height: 1.6;
}

header {
  background: #0b5cff;
  color: white;
  text-align: center;
  padding: 30px 20px;
}

.logo {
  font-size: 28px;
  font-weight: bold;
}

header p {
  margin-top: 6px;
}

main {
  max-width: 1100px;
  margin: auto;
  padding: 30px 20px;
}

.hero {
  background: white;
  text-align: center;
  padding: 50px 20px;
  border-radius: 18px;
  margin-bottom: 30px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.hero h1 {
  font-size: 36px;
  margin-bottom: 12px;
}

button {
  background: #ffb000;
  border: none;
  padding: 12px 22px;
  border-radius: 8px;
  font-weight: bold;
  cursor: pointer;
  margin-top: 15px;
}

.plans h2 {
  text-align: center;
  margin-bottom: 20px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.card {
  background: white;
  padding: 25px 18px;
  border-radius: 15px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.07);
}

.card h3 {
  color: #0b5cff;
  font-size: 22px;
}

footer {
  text-align: center;
  padding: 25px;
  margin-top: 30px;
  background: #172033;
  color: white;
}

@media (max-width: 800px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero h1 {
    font-size: 28px;
  }
}

@media (max-width: 500px) {
  .cards {
    grid-template-columns: 1fr;
  }
}