📄 index.html ✕

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

body {
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, #667eea, #764ba2);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  background: white;
  border-radius: 16px;
  padding: 40px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  max-width: 400px;
  width: 90%;
}

h1 {
  font-size: 2rem;
  color: #4a3f8f;
  margin-bottom: 12px;
}

p {
  color: #666;
  margin-bottom: 24px;
  line-height: 1.6;
}

button {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  border: none;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(102,126,234,0.4);
}

#output {
  margin-top: 20px;
  font-size: 1.1rem;
  color: #764ba2;
  font-weight: 600;
  transition: transform 0.2s;
}

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