body {
    padding-top: 100px;
}

h1 {
    font-size: 60px;
    color: green;
}

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

.imageHolder {
    display: flex;
    gap: 15px;
    align-items: center;
    padding: 70px;
    border: solid 2px #f6f6f6;
    border-radius: 15px;
    background: url(photo.jpg);
    background-repeat: no-repeat;
    background-size: cover;
}

.hello {
    color: red;
}

.hello:hover {
    color: blueviolet;
}

.firstImage {
    width: 200px;
}

.square {
    width: 100px;
    height: 100px;
    background: black;
    color: white;
    text-align: center;
    padding: 10px;
    margin-top: 50px;
    box-sizing: border-box;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.4s ease;
}

.square:hover {
    background: yellow;
    color: black;
    transform: rotate(10deg);
}

.square.fixed {
    background: yellow;
    color: black;
    transform: rotate(10deg);
}

header {
    position: fixed;
    top: 0px;
    left: 0px;
    right: 0px;
    z-index: 2;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 1px 13px 16px 4px #0000002e;
}

navs {
    display: flex;
}

navs a {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: green;
    text-decoration: none;
    padding: 30px 10px;
    transition: all 0.4s ease;
}

navs a:hover {
    background: orange;
}