#content {
    font-family: 'Times New Roman', Times, serif;
    max-width: 600px;
    margin: 0 auto;
    margin-top: 50px;
    border: 1.6px solid lightgray;
    padding: 75px;
}
#choose-Theme {
    position: fixed;
    top: 10px;
    left: 10px;
    width: auto;
    padding: 4px 6px;
    font-size: 14px;
    z-index: 1000;
}
body{
    transition: background-color 1s ease;
}
header {
    text-align: center;
}
hr { 
    margin-top: 5px;
    margin-bottom: 1rem;
    height: 1.6px;
    background-color: lightgray;
    border: none;
}
h1 { 
    letter-spacing: 0.2rem;
    text-transform: uppercase;
    display: block;
    width: 100%;
    margin-bottom: 0.1rem;
    font-size: 40px;
}
h2 {
    color: #006EB6;
    letter-spacing: 0.1rem;
    margin-bottom: 0.1rem;
    display: inline-block;
    width: auto;
    font-size: 20px;
    font-weight: normal;
}
p , .list {
    font-size: 20px;
    text-align: left;
}
p {
    margin-top: 2.5rem;
}
.list li {
    margin-top: 1.5rem;
}
img {
    margin: 0 auto;
    display: block;
    height: auto;
    max-width: 150px;
    padding-top: 3rem;
}

/* dark theme */
body.dark {
    background-color: rgba(51, 51, 51, 51);
}

body.dark h1,
body.dark p,
body.dark .list {
    color: white;
}

body.dark h2 {
    color:#0194f6;
}

/*light theme */
body.light {
    background-color: white;
}