body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

header nav {
    background-color: #333;
    overflow: hidden;
}

header nav a {
    float: left;
    display: block;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

header nav a:hover {
    background-color: #ddd;
    color: black;
}

header nav span {
    float: right;
    color: #f2f2f2;
    padding: 14px 16px;
}

footer {
    background-color: #333;
    color: #f2f2f2;
    text-align: center;
    padding: 10px;
    position: fixed;
    width: 100%;
    bottom: 0;
}

h1, h2 {
    padding: 20px;
}

form {
    padding: 20px;
}

.breadcrumb {
    background: linear-gradient(90deg, #f8f9fa, #e9ecef);
    border: 1px solid #dee2e6;
    padding: .75rem 1rem;
    border-radius: .5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.04);
}
.breadcrumb .breadcrumb-item + .breadcrumb-item::before {
    content: ">";
    color: #495057;
    padding: 0 0.5rem 0 0;
}
.breadcrumb .active {
    font-weight: 600;
    color: #0d6efd;
}

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

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

th, td {
    padding: 8px;
    text-align: left;
}

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

li {
    padding: 5px;
}

.error {
    color: red;
}

.success {
    color: green;
}

.editable {
    cursor: pointer;
}