* { margin: 0; padding: 0; box-sizing: border-box; } body { font-family: system-ui, -apple-system, sans-serif; min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: #fff; } header { text-align: center; margin-bottom: 2rem; } h1 { font-size: 3rem; margin-bottom: 0.5rem; } main { text-align: center; } button { padding: 0.75rem 2rem; font-size: 1.1rem; border: none; border-radius: 8px; background: #fff; color: #764ba2; cursor: pointer; transition: transform 0.15s ease; } button:hover { transform: scale(1.05); } button:active { transform: scale(0.95); } #clickCount { margin-top: 1rem; font-size: 1.25rem; }