body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background: #f5f5f5;
    color: #222;
}

h1, h2 {
    margin-top: 0;
}

a {
    color: #0066cc;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.nav {
    margin-bottom: 20px;
}

.container {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
}

table th,
table td {
    border: 1px solid #ddd;
    padding: 10px;
    text-align: left;
    vertical-align: top;
}

table th {
    background: #f0f0f0;
}

input,
select,
textarea,
button {
    padding: 8px;
    font-size: 14px;
}

button {
    cursor: pointer;
}

.success {
    color: green;
    font-weight: bold;
}

.error,
.conflict {
    color: red;
    font-weight: bold;
}