* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Arial', sans-serif; background: #fafafa; display: flex; justify-content: center; padding-top: 50px; min-height: 100vh; }
.container { background: white; padding: 30px; border-radius: 10px; box-shadow: 0 4px 15px rgba(0,0,0,0.05); width: 80%; max-width: 800px; text-align: center; }
h1 { margin-bottom: 20px; color: #333; }
.input-area { display: flex; justify-content: center; gap: 10px; margin-bottom: 30px; }
input { width: 100px; padding: 10px; border: 1px solid #ccc; border-radius: 5px; outline: none; }
button { padding: 10px 20px; background: #27ae60; color: white; border: none; border-radius: 5px; cursor: pointer; transition: 0.3s; }
button:hover { background: #2ecc71; }
.table-container { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; margin-top: 10px; }
th, td { border: 1px solid #ddd; padding: 12px; text-align: center; }
th { background-color: #f2f2f2; font-weight: bold; }
tr:nth-child(even) { background-color: #f9f9f9; }
tr:hover { background-color: #f1f1f1; }