body {
    font-family: Arial, sans-serif;
    margin: 0;
    background-color: #f4f4f4;
    color: #333;
}

.header {
    background: white;
    color: black;
    padding: 20px;
    text-align: center;
}

.header h1 {
    margin: 0;
}

.sidebar {
    width: 220px;
    background: black;
    color: white;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    padding-top: 20px;
}

.sidebar ul {
    list-style-type: none;
    padding: 0;  
}

.sidebar ul li {
    padding: 10px;
}
  
.sidebar ul li a {
    color: white;
    text-decoration: none;
    display: block;
}

.sidebar ul li a:hover {
    background: #666;
}

.dropdown-content {
    display: none;
    list-style-type: none;
    padding-left: 15px;
}

.dropdown:hover .dropdown-content {
    display: block;
}

table {
    border-collapse: collapse;
    width: 100%;
    margin: 20px 0;
    background: white;
}

table th, table td {
    border: 1px solid #ddd;
    padding: 8px;
}

table th {
    background-color: #333;
    color: white;
}

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

table tr:hover {
    background-color: #f1f1f1;
}

form {
    margin: 20px;
    padding: 20px;
    background: white;
    border-radius: 5px;
}

label {
    display: block;
    margin: 10px 0 5px;
}
  
input[type="text"], input[type="number"], input[type="date"], select, textarea {
    width: 100%;
    padding: 8px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 4px;
}
  
button, input[type="submit"] {
    background: #333;
    color: white;
    border: none;
    padding: 10px 15px;
    cursor: pointer;
    border-radius: 4px;
}
  
button:hover, input[type="submit"]:hover {
    background: #555;
}

.success {
    color: green;
    font-weight: bold;
}
  
.error {
    color: red;
    font-weight: bold;
}
  
blockquote {
    background: #e9ecef;
    padding: 10px;
    border-left: 5px solid #333;
}

.logo {
    display: block;        /* makes the image behave like a block element */
    margin: 0 auto;        /* centers it horizontally */
    max-width: 200px;      /* sets a maximum width */
    height: auto;          /* keeps the aspect ratio */
}

.back-link {
    display: inline-block;
    background-color: #333;
    color: white;
    padding: 10px 15px;
    text-decoration: none;
    border-radius: 4px;
    margin-top: 20px;
}
  
.back-link:hover {
    background-color: #555;
}