body {
    background-color: #f1f5f9;
    font-family: sans-serif;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: 60px auto;
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0,0,0,0.1);
    text-align: center;
}

h1 {
    margin-bottom: 30px;
    color: #333;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

thead {
    background-color: #374151;
    color: white;
}

th, td {
    padding: 12px;
    border: 1px solid #ccc;
    text-align: center;
}

tr:nth-child(even) {
    background-color: #f9fafb;
}

.add-btn {
    display: inline-block;
    background-color: #10b981;
    color: white;
    padding: 10px 20px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s;
}

.add-btn:hover {
    background-color: #059669;
}