index.css

/* EVERYTHING */
* {
    margin: 0px;
}

/* BODY */

body {
    font-family: 'Roboto', sans-serif;
}

/* HEADER */

header {
    background-color: #1F2937;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 240px;
}

header h1 {
    color: white;
    font-size: 24px;
    margin: 0px;
}

header ul {
    display: flex;
    list-style-type: none;
    margin: 0px;
}

header li {
    color: lightgray;
    padding-left: 16px;
}

/* HERO */

.hero {
    background-color: #1F2937;
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 80px 240px 120px;
}

.hero .hero-left {
    display: flex;
    flex-direction: column;
    padding-right: 40px;
}

.hero .hero-left h1 {
    margin-bottom: 0px;
    font-size: 48px;
    font-weight: 800;
    color: #F9FAF8;
}

.hero .hero-left p {
    font-size: 18px;
    color: #E5E7EB;
    margin: 0px 0px 24px 0px;
}

.hero button {
    background-color: #3B82F6;
    width: 104px;
    border-radius: 6px;
    border: 0px;
    color: white;
    padding: 16px 8px;
    font-size: 18px;
}

.hero img {
    width: 640px;
}

/* WHITE SECTION */

.section-white {
    margin: 64px 0px;
    display: flex;
    align-items: center;
    flex-direction: column;
}

.section-white h2 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 40px;
}

.box-row {
    display: flex;
    justify-content: space-between;
    width: 960px;
}

.box-unit {
    width: 184px;
    color: gray;
    text-align: center;
}

.section-white .square {
    border: 4px #3B82F6 solid;
    border-radius: 16px;
    height: 184px;
}

/* GRAY SECTION */

.section-gray {
    background-color: #E5E7EB;
    display: flex;
    align-items: center;
    flex-direction: column;
    padding: 120px 440px;
}

.section-gray .quote {
    font-size: 36px;
    font-weight: 200;
    color: #1F2937;
}

.section-gray .quote-attribution {
    font-size: 24px;
    align-self: flex-end;
}

/* SECTION CTA */

.section-cta {
    background-color: white;
}

.blue-cta {
    background-color: #3B82F6;
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 72px 160px;
    margin: 120px 264px;
    border-radius: 16px;
}

.blue-cta {
    font-size: 20px;
}

.blue-cta h3 {
    font-size: 32px;
    font-weight: 800;
}

.blue-cta button {
    background-color: #3B82F6;
    color: white;
    border: 2px white solid;
    border-radius: 6px;
    padding: 8px 40px;
    font-size: 20px;
    font-weight: 800;
}

/* FOOTER */

footer {
    background-color: #1F2937;
    color: #E5E7EB;
    display: flex;
    justify-content: center;
    padding: 64px 240px;
    font-size: 20px;
}