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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.container {
  max-width: 800px;
  width: 100%;
}

header {
  text-align: center;
  color: white;
  margin-bottom: 40px;
}

header h1 {
  font-size: 48px;
  margin-bottom: 10px;
}

header p {
  font-size: 18px;
  opacity: 0.9;
}

main {
  display: grid;
  gap: 20px;
}

.card {
  background: white;
  border-radius: 10px;
  padding: 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
}

.card h2 {
  color: #667eea;
  margin-bottom: 15px;
  font-size: 24px;
}

.card p {
  color: #555;
  line-height: 1.6;
  margin-bottom: 10px;
}

.card ul {
  margin-left: 20px;
}

.card li {
  color: #555;
  margin-bottom: 8px;
  line-height: 1.6;
}

button {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 16px;
  transition: opacity 0.3s ease;
}

button:hover {
  opacity: 0.9;
}

#time {
  font-size: 20px;
  font-weight: bold;
  color: #667eea;
  margin-bottom: 10px;
}

footer {
  text-align: center;
  color: white;
  margin-top: 40px;
  opacity: 0.8;
}

@media (max-width: 600px) {
  header h1 {
    font-size: 32px;
  }

  .card {
    padding: 20px;
  }
}