body {
    font-family: Arial, sans-serif;
    background: #f4f6f8;
    margin: 0;
}

.navbar {
    background: #1f2937;
    color: white;
    padding: 15px;
    display: flex;
    justify-content: space-between;
}

.navbar a {
    color: white;
    margin-left: 15px;
    text-decoration: none;
}

.container {
    max-width: 900px;
    margin: 40px auto;
    background: white;
    padding: 30px;
    border-radius: 6px;
}

.auth-box {
    max-width: 400px;
    margin: 100px auto;
    padding: 30px;
    background: white;
    border-radius: 6px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

input, textarea {
    width: 100%;
    padding: 10px;
    margin-top: 10px;
}

button {
    background: #2563eb;
    color: white;
    border: none;
    padding: 10px;
    margin-top: 15px;
    cursor: pointer;
}

button:hover {
    background: #1e40af;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th, .table td {
    border-bottom: 1px solid #ddd;
    padding: 10px;
}

.action-links a {
    margin-right: 10px;
    color: #2563eb;
}
.error-box {
    background: #fee2e2;
    color: #991b1b;
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 4px;
    font-size: 14px;
}