*,
*::before,
*::after {
    box-sizing: border-box;
}

:root {
    --font-primary: Arial, Helvetica, sans-serif;

    --fw-reg: 400;
    --fw-semibold: 700;
    --fw-bold: 900;

    --fs-h1: 3rem;
    --fs-h2: 2.25rem;
    --fs-h3: 1.15rem;
    --fs-body: 1rem;

    --clr-light: #fff;
    --clr-dark: #303030;
    --clr-accent: #2a4364;

    --bs: .25em .25em .75em rgba(0,0,0,.25),
          .125em .125em .25em rgba(0,0,0,.15)
}

@media (min-width: 900px) {
    :root {
        --fs-h1: 4.5rem;
        --fs-h2: 3.75rem;
        --fs-h3: 1.35rem;
        --fs-body: 1.125;
    }
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--clr-light);
    color: var(--clr-dark);
    font-family: var(--font-primary);
    font-size: var(--fs-body);
    line-height: 1.6;
    margin: 0;
}

img {
    display: block;
    max-width: 100%;
}

section {
    padding: 2em 1.5em;
}

strong {
    font-weight: var(--fw-semibold);
}

:focus {
    outline: 1px solid var(--clr-accent);
    outline-offset: 1px;
}

h1 {font-size: var(--fs-h1)}
h2 {font-size: var(--fs-h2)}
h3 {font-size: var(--fs-h3)}

h1,
h2,
h3 {
    margin: 0;
    line-height: 1.1;
}

h1 {color: var(--clr-accent)}

.new-customers {
    max-width: 1200px;
    margin-inline: auto;
}

.new-customers__img {
    box-shadow: var(--bs);
}
.section__info {
    margin-left: 3em;
    margin-bottom: 2em;
}

.section__info > p {
    margin: .5em;
}

.section__notice {
    font-size: var(--fs-h3);
    background-color: var(--clr-accent);
    color: var(--clr-light);
    padding: .25em 1em;
    margin-bottom: 1em;
}

@media (min-width: 900px) {
    .new-customers {
        display: grid;
        grid-template-areas:
            "title img"
            "body img"
            "notice img";
        grid-auto-columns: 1fr 520px;
        column-gap: 2em;
    }

    .section__notice {
        grid-area: notice;
        grid-column: 1 / -1;
        position: relative;
        left: -1em;
        width: calc(100% + 2em);
        padding-left: 1em;
        padding-right: calc(520px + 3em);
    }

    .new-customers__img {
        grid-area: img;
        position: relative;
        z-index: 2;
    }
}