.d-flex {
    display: flex;
}

.flex-column {
    flex-direction: column;
}

img {
    max-width: 100%;
    height: auto;
}

.paragraph {
    font-size: 14px;
    letter-spacing: 0.025em;
    line-height: 30px;
    font-weight: 300;
    margin-bottom: 32px;
}

.border-bottom {
    position: relative;
}
.border-bottom::after {
    background-color: #1DA1D1;
    content: "";
    height: 1px;
    width: 100%;
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);    
}

body {
    background: rgba(29, 161, 209, 0.07);
    color: #08526E;
    font-family: Arial, "Segoe UI", Roboto, "Helvetica Neue", "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    font-weight: 400;
    font-style: normal;
    position: relative;
}
h1, h2, h3, h4, h5, p, figure {
    margin: 0;
}

#back-link {
    background-color: #1DA1D1;
    color: white;
    text-decoration: none;
}

body > header, body > section {
    margin-left: auto;
    margin-right: auto;
}

header {
    display: flex;
}

header::after {
    height: 2px !important;
}

@media all and (min-width: 1024px) {
    body > header, body > section {
        max-width: 1544px;
    }
    header {
        margin-top: 70px;
        padding-bottom: 61px;
        margin-bottom: 47px;
        align-items: flex-end;
        justify-content: space-between;
    }
    body > header, body > section {
        margin-left: 9.8vw;
        margin-right: 9.8vw;
    }
    header aside {
        text-align: right;
    }
    header .title {
        font-size: 34px;
        letter-spacing: 0.041em;
        margin-bottom: 12px;
    }
    header .subtitle {
        letter-spacing: 0.035em;
        font-size: 22px;
        font-weight: 300;
    }
    #back-link {
        padding: 13px 52px;
        border-radius: 30px;
        font-size: 20px;
        letter-spacing: 0.2em;
    }
    section.section .title {
        font-size: 34px;
        letter-spacing: 0.041em;
        margin-bottom: 12px;
    }
    section.section .subtitle {
        letter-spacing: 0.035em;
        font-size: 22px;
        font-weight: 300;
    }
    section.section .figcaption {
        font-size: 16px;
        letter-spacing: 0.035em;
        margin-bottom: 12px;
        font-weight: 400;
    }
    section.section {
        justify-content: space-between;
    }
    section.section .left-block {
        flex-grow: 0;
        flex-shrink: 1;
        flex-basis: 634px;
        margin-right: 24px;
    }
    section.section .right-block {
        flex-grow: 0;
        flex-shrink: 1;
        flex-basis: 728px;
    }
    section.a-second .right-block img {
        max-width: 279px;
        width: calc(50% - 16px);
    }
    section.a-second .right-block img:first-child {
        margin-right: 26px;
    }
    section.section .left-block .border-bottom {
        padding-bottom: 32px;
        margin-bottom: 32px;
    }
    section.a-first {
        padding-bottom: 51px;
        margin-bottom: 60px;
    }
    section.a-first::after {
        height: 2px !important;
    }
    section.a-first .right-block img {
        max-width: 559px;
    }
    section.a-second {
        margin-bottom: 64px;
    }
    footer {
        display: none;
    }
}

@media all and (max-width: 1023px) {
    body > header, body > section {
        max-width: 83.97vw;
    }
    header {
        margin-top: 63px;
        padding-bottom: 44px;
        flex-direction: column;
        align-items: center;
    }
    header aside {
        margin-top: 84px;
        text-align: center;
    }
    header .title {
        font-size: 22px;
        letter-spacing: 0.041em;
        margin-bottom: 12px;
    }
    header .subtitle {
        letter-spacing: 0.019em;
        font-size: 14px;
        font-weight: 300;
    }
    #back-link {
        padding: 9px 35px;
        border-radius: 30px;
        font-size: 13px;
        letter-spacing: 0.2em;
    }
    section.section {
        flex-direction: column;
    }
    section.section .title {
        font-size: 22px;
        letter-spacing: 0.041em;
        margin-bottom: 12px;
    }
    section.section .subtitle {
        letter-spacing: 0.019em;
        font-size: 14px;
        font-weight: 300;
    }
    section.section .figcaption {
        font-size: 16px;
        letter-spacing: 0.035em;
        margin-bottom: 12px;
        font-weight: 400;
    }
    section.section .left-block .border-bottom {
        margin-left: auto;
        margin-right: auto;
        margin-top: 44px;
        padding-bottom: 44px;
        margin-bottom: 32px;
        text-align: center;
    }
    section.section .left-block .border-bottom::after {
        width: 40.71vw;
    }
    section.a-first {
        padding-bottom: 44px;
    }
    section.a-second img {
        margin-bottom: 32px;
    }
    footer {
        display: flex;
        justify-content: center;
        margin-top: 52px;
        margin-bottom: 36px;
    }
}