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

.login-container,
.register-container,
.dashboard-container,
.video-container,
.video-playback-container,
.alert-container,
.alert-config-container {
    width: 400px;
    margin: 50px auto;
    padding: 20px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 5px;
}

h2, h3 {
    margin-top: 0;
    text-align: center;
}

form label {
    display: block;
    margin-top: 10px;
    font-weight: bold;
}

form input[type="text"],
form input[type="email"],
form input[type="password"],
form input[type="time"] {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
    box-sizing: border-box;
}

form button {
    margin-top: 15px;
    width: 100%;
    padding: 10px;
    background: #007bff;
    border: none;
    color: white;
    font-size: 16px;
    cursor: pointer;
}

form button:hover {
    background: #0056b3;
}

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

a:hover {
    text-decoration: underline;
}

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

ul li {
    background: #eee;
    margin-bottom: 5px;
    padding: 8px;
    border-radius: 3px;
}

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

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