* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: system-ui; min-height: 100vh; display: flex; justify-content: center; align-items: center; background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%); }
.container { background: white; padding: 3rem; border-radius: 16px; text-align: center; box-shadow: 0 20px 60px rgba(0,0,0,0.2); max-width: 500px; }
h1 { margin-bottom: 1rem; }
button { margin-top: 1.5rem; padding: 12px 32px; font-size: 16px; background: #11998e; color: white; border: none; border-radius: 8px; cursor: pointer; transition: transform 0.2s; }
button:hover { transform: scale(1.05); }
#output { margin-top: 1rem; font-size: 1.2rem; color: #11998e; }