body {
    font-family: "Courier New", Courier, monospace;
    font-size: 14px;
    line-height: 1.5;
    color: #000;
    background: #fff;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

h1, h2, h3 {
    color: #000;
    border-bottom: 1px solid #ccc;
    padding-bottom: 5px;
}

.main-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    border: 1px solid #ddd;
}

.main-table th {
    background-color: #f0f0f0;
    text-align: left;
    padding: 8px;
    border: 1px solid #ddd;
}

.main-table td {
    padding: 8px;
    border: 1px solid #ddd;
}

.main-table tr:nth-child(even) {
    background-color: #f9f9f9;
}

.btn {
    display: inline-block;
    padding: 5px 10px;
    background: #f0f0f0;
    color: #000;
    text-decoration: none;
    border: 1px solid #ccc;
    border-radius: 3px;
    margin-right: 5px;
}

.btn:hover {
    background: #e0e0e0;
}

.btn.buy {
    background: #ffd700;
    border-color: #d4af37;
}

.btn.buy:hover {
    background: #e6c200;
}

.error {
    color: #d00;
    background: #ffecec;
    padding: 10px;
    border: 1px solid #f5aca6;
    margin-bottom: 15px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.form-group input[type="password"] {
    width: 300px;
    padding: 5px;
    border: 1px solid #ccc;
    font-family: monospace;
}

.footer {
    margin-top: 20px;
    padding-top: 10px;
    border-top: 1px solid #eee;
    font-size: 12px;
    color: #666;
}