body {
    font-family: 'Segoe UI', Tahoma, sans-serif;
    background: #f9f9f9;
    color: #333;
    margin: 0;
    padding: 0;
}

h1, h2 {
    text-align: center;
    color: #2c3e50;
}

.container {
    width: 80%;
    margin: 0 auto;
    padding: 20px;
}

.table-container {
    background: #ffffff;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    padding: 20px;
}

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

th {
    background: #34495e;
    color: #fff;
}

th, td {
    padding: 12px;
    border-bottom: 1px solid #ddd;
    text-align: left;
}

a.button {
    display: inline-block;
    padding: 10px 20px;
    margin: 10px 5px;
    background: #2980b9;
    color: #fff;
    text-decoration: none;
    border-radius: 6px;
    transition: background 0.3s ease;
}

a.button:hover {
    background: #1abc9c;
}

.form-box {
    max-width: 400px;
    margin: 30px auto;
    padding: 20px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

input[type="text"], input[type="password"], input[type="number"] {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 5px;
}

input[type="submit"] {
    width: 100%;
    padding: 10px;
    background: #2980b9;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

input[type="submit"]:hover {
    background: #1abc9c;
}

.error-message {
    color: red;
    text-align: center;
}