body {font-family: "Roboto", sans-serif; 
    color: #434455; 
    background-color: #FFFFFF;}

ul, ol {
    list-style-type: none;
    margin: 0;
    padding: 0;
}

h1, h2, h3, h4, h5, h6, p {
    margin: 0;
}

a {text-decoration: none;}

img {display: block;}

.container {
    max-width: 1158px;
    padding: 0 15px;
    margin: 0 auto;
}

/*header*/

.page-header {
    border-bottom: 1px solid #e7e9fc;
    box-shadow: 0px 2px 1px rgba(46, 47, 66, 0.08),
        0px 1px 1px rgba(46, 47, 66, 0.16),
        0px 1px 6px rgba(46, 47, 66, 0.08);
}

.header-container {
    display: flex;
    align-items: center;
}

.header-nav {
    display: flex;
    align-items: center;
}

.logo {font-family: "Raleway", sans-serif;
    font-weight: 700;
    font-size: 18px;
    line-height: 1.17;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: #4d5ae5;}

.header-logo {
    padding: 24px 0;
    margin-right: 76px;
}

.header-logo > .logo-part {color: #2e2f42;}

.nav-list {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    display: block;
    padding: 24px 0;
    font-weight: 500;
    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.02em;
    color: #2e2f42;
    transition: color 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link.current {
    position: relative;
}

.nav-link.current::after {
    content: "";
    width: 100%;
    position: absolute;
    left: 0;
    bottom: -1px;
    height: 4px;
    background-color: #404bbf;
    border-radius: 2px;
}

.contacts {
    margin-left: auto;
    font-style: normal;}

.contacts-list {
    display: flex;
    align-items: center;
    gap: 40px;
}

.contacts-link {
    display: block;
    padding: 24px 0;
    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.02em;
    color: #434455;
    transition: color 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link:hover,
.nav-link:focus,
.contacts-link:hover,
.contacts-link:focus,
.nav-link.current {
    color: #404bbf;
}

/*section1*/
.banner {
    padding: 188px 0;
    margin-left: auto;
    margin-right: auto;
    background-color: #2e2f42;
    background-image: linear-gradient(rgba(46, 47, 66, 0.7), rgba(46, 47, 66, 0.7)), url(../images/people-office.jpg);
    max-width: 1440px;
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
}

.banner-title {
        max-width: 496px;
        font-weight: 700;
        font-size: 56px;
        line-height: 1.07;
        letter-spacing: 0.02em;
        text-align: center;
        color: #ffffff;
        margin-left: auto;
        margin-right: auto;
        margin-bottom: 48px;
    }

.banner-button {
    display: block;
    margin-left: auto;
    margin-right: auto;
    min-width: 169px;
    height: 56px;
    border: none;
    background-color: #4D5AE5;
    border-radius: 4px;
    font-weight: 500;
    line-height: 1.5;
    letter-spacing: 0.04em;
    color: #ffffff;
    cursor: pointer;
    transition: background-color 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.banner-button:hover,
.banner-button:focus,
.social-link:hover,
.social-link:focus {background-color: #404BBF;}

/*section2*/
.feature {
    padding: 120px 0;
}

.visually-hidden {
    overflow: hidden;
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    border: 0;
    padding: 0;
    white-space: nowrap;
    clip-path: inset(100%);
    clip: rect(0 0 0 0);
}

.feature-list {
    display: flex;
    gap: 24px;
}

.feature-item {
    width: calc((100% - 72px)/4);
}

.feature-item-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 112px;
    background-color: #f4f4fd;
    border-radius: 4px;
    border: 1px solid #8e8f99;
    margin-bottom: 8px;
}

.feature-title,
.team-list-title,
.portfolio-item-title {
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 20px;
    line-height: 1.2;
    letter-spacing: 0.02em;
    color: #2e2f42;}

.feature-text,
.team-list-text,
.portfolio-item-text {font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.02em;}

/*section3*/
.team {
    padding: 120px 0;
    background-color: #F4F4FD;
}

.team-title,
.portfolio-title {
    margin-bottom: 72px;
    font-size: 36px;
    line-height: 1.11;
    text-align: center;
    letter-spacing: 0.02em;
    text-transform: capitalize;
    color: #2e2f42;
}

.team-list {
    display: flex;
    gap: 24px;
}

.team-item {
    box-shadow: 0px 1px 6px rgba(46, 47, 66, 0.08),
        0px 1px 1px rgba(46, 47, 66, 0.16),
        0px 2px 1px rgba(46, 47, 66, 0.08);
    width: calc((100% - 72px)/4);
    border-radius: 0px 0px 4px 4px;
    background-color: #FFFFFF;}

.team-box {padding: 32px 0;}

.team-list-title,
.team-list-text {text-align: center;}

.social-list {
    display: flex;
    justify-content: center;
    gap: 24px;
}

.social-item {
    width: 40px;
    height: 40px;
    }

.social-link {
    width: 100%;
    height: 100%;
    background-color: #4d5ae5;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 250ms cubic-bezier(0.4, 0, 0.2, 1)
}

.social-icon {
    fill: #f4f4fd;
}

.team-list-text {
    margin-bottom: 8px;
}

/*section4*/
.portfolio {
    padding-top: 120px;
    padding-bottom: 120px;
}

.portfolio-list {
    display: flex;
    flex-wrap: wrap;
    column-gap: 24px;
    row-gap: 48px;
}

.portfolio-item {
    width: calc((100% - 48px)/3);
    transition: box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.portfolio-item:hover {
    box-shadow: 0px 1px 6px rgba(46, 47, 66, 0.08),
        0px 1px 1px rgba(46, 47, 66, 0.16),
        0px 2px 1px rgba(46, 47, 66, 0.08);
}

.overlay {
    position: absolute;
    top: 0;
    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.02em;
    color: #f4f4fd;
    padding: 40px 32px;
    background-color: #4d5ae5;
    height: 100%;
    width: 100%;
    transform: translateY(100%);
    transition: transform 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.portfolio-item:hover .overlay {
    transform: translateY(0%);
}

.portfolio-box {
    padding: 32px 16px;
    border: 1px solid #e7e9fc;
    border-top: none;
}

/*footer*/
.page-footer {
    padding: 100px 0;
    background-color: #2e2f42;
}

.container.footer {
    display: flex;
    align-items: baseline;
}

.footer-wrap {
    margin: 0 120px 0 0;
}

.footer-logo {
    display: inline-block;
    margin-bottom: 16px;
}

.footer-logo > .logo-part {color: #f4f4fd}

.footer-logo-text {
    max-width: 264px;
    line-height: 1.5;
    letter-spacing: 0.02em;
    color: #F4F4FD;
}

.footer-social-text {
    font-weight: 500;
    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.02em;
    color: #FFFFFF;
    margin-bottom: 16px;
}

.footer-social-list {
    display: flex;
    gap: 16px;
}

.footer.social-link:hover,
.footer.social-link:focus {
    background-color: #31d0aa;
}