style.css

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

body {
    width: 100%;
    height: 100%;
}

nav {
    width: auto;
    height: 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 15px 12px 18px 15px;
}

.img-ul {
    display: flex;
}

.logo {
    width: 105px;
    height: 35px;
    margin-right: 60px;
    cursor: pointer;
}

.ul-list {
    list-style-type: none;
    display: flex;
    gap: 20px;
    font-weight: 600;
    font-size: 15px;
    line-height: 30px;
}

.ul-list li {
    cursor: pointer;
}

.ul-list li:hover {
    color: #5955b3;
}

.small-button {
    color: #fff;
    background-color: #8f27b8;
    padding: 8px 14px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-align: center;
}

main {
    display: flex;
    justify-content: center;
    align-items: center;
}

.main-left {
    display: flex;
    flex-direction: column;
    margin: 0 auto;
}

h1 {
    color: rgb(82, 16, 82);
    font-size: 3em;
    width: 280px;
    margin: 55px 12px 20px 14px;
}

h1 span {
    color: #8f27b8;
}

p {
    color: darkgrey;
    margin: 0 10px 49px 14px;
}

.big-button {
    background-color: #8f27b8;
    color: #fff;
    padding: 3px 2px;
    border: none;
    width: 140px;
    height: 40px;
    border-radius: 12px;
    margin-left: 20px;
}

.main-pic {
    width: 455px;
    height: 420px;
    margin: 20px 20px 0 20px;
}