body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f3f3f3;
}

.topbar {
    background: #222;
    color: #fff;
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar a {
    color: #fff;
    text-decoration: none;
    margin-right: 10px;
}

.container {
    max-width: 900px;
    margin: 30px auto;
    background: #fff;
    padding: 20px 25px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

/* Login */

.login-body {
    background: #e0e0e0;
}

.login-box {
    width: 320px;
    margin: 120px auto;
    padding: 25px 20px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.2);
    text-align: center;
}

.login-box h2 {
    margin-top: 0;
    margin-bottom: 20px;
}

.login-box input {
    width: 90%;
    padding: 8px;
    margin: 6px 0;
    border-radius: 4px;
    border: 1px solid #ccc;
}

.login-box button {
    margin-top: 10px;
    padding: 8px 16px;
    border: none;
    background: #007bff;
    color: #fff;
    border-radius: 4px;
    cursor: pointer;
}

.login-box button:hover {
    background: #0056b3;
}

.error {
    color: #b00020;
    margin-bottom: 10px;
}

/* Files */

.file-list {
    list-style: none;
    padding-left: 0;
}

.file-list li {
    margin: 5px 0;
}

.file-list a {
    text-decoration: none;
    color: #007bff;
}

.file-list a:hover {
    text-decoration: underline;
}

/* Admin */

.admin-section {
    margin-bottom: 25px;
}

.admin-form input {
    margin-right: 5px;
    padding: 5px;
}

.admin-form button {
    padding: 6px 12px;
    border: none;
    background: #28a745;
    color: #fff;
    border-radius: 4px;
    cursor: pointer;
}

.admin-form button:hover {
    background: #1e7e34;
}

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

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

.user-table th {
    background: #f0f0f0;
}

.user-table button {
    padding: 4px 8px;
    border: none;
    background: #dc3545;
    color: #fff;
    border-radius: 4px;
    cursor: pointer;
}

.user-table button:hover {
    background: #b21f2d;
}