* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
}

.notification-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 24px;
    margin-bottom: 20px;
}

.notification-list {
    list-style: none;
    padding: 0;
}

.notification-item {
    background-color: #ffffff;
    padding: 10px;
    margin-bottom: 10px;
    border-radius: 4px;
    box-shadow: 0px 0px 5px rgba(0, 0, 0, 0.1);
}

.notification-item.unread {
    background-color: #eaf1ff;
    border-left: 4px solid #007bff;
}

.notification-message {
    font-size: 16px;
    margin-bottom: 8px;
}

.notification-timestamp {
    font-size: 12px;
    color: #888;
}