body {
    font-family: Arial, sans-serif;
    background: #f0f2f5;
    padding: 20px;
}
.container {
    background: #fff;
    padding: 20px;
    max-width: 480px;
 margin: 40px auto;
    box-shadow: 0 0 8px rgba(0,0,0,0.1);
    border-radius: 6px;
}
h1, h2 {
    margin-bottom: 20px;
    color: #333;
}
form label {
    display: block;
    margin-top: 15px;
    margin-bottom: 5px;
}
input[type="text"],
input[type="password"],
input[type="number"] {
    width: 100%;
    padding: 8px;
    box-sizing: border-box;
}
button {
    margin-top: 20px;
    padding: 10px 15px;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}
button:hover {
    background: #2980b9;
}
.error {
    color: #e74c3c;
    background: #fce4e4;
    padding: 10px;
    border-radius: 4px;
}
.success {
    color: #27ae60;
    background: #e2f4ea;
    padding: 10px;
    border-radius: 4px;
}
.btn {
    display: inline-block;
    margin-bottom: 10px;
    padding: 8px 12px;
    background: #2980b9;
    color: white;
    text-decoration: none;
    border-radius: 4px;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}
table, th, td {
    border: 1px solid #ddd;
}
th, td {
    padding: 10px;
    text-align: left;
}