index.css

* {
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
}
body {
    font-family: "Roboto", sans-serif;
    background-color: #8898aa1a;
}
.title {
    text-align: center;
    margin: 100px 0;
    font-size: 50px;
    font-weight: 900;
}
p {
    font-size: 24px;
    font-weight: 400;
    line-height: 2.5rem;
    margin: 100px 0;
}
.container {
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}
.section {
    padding: 60px 30px;
}

.progress-bar {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 20px;
    background-color: #c7c7c7;
}
.progress-bar::after {
    position: absolute;
    content: "";
    top: 0;
    left: 0;
    width: var(--width);
    height: inherit;
    background-color: #32bcfa;
}