:root {
  --accent-color: #2196f3;
  --headers-color: #212121;
  --text-color: #757575;
  --background-color: #2f303a;
  --background-our-team-color: #f5f4fa;
  --info-footer-color: rgba(255, 255, 255, 0.6);
  --color-white: #fff;
  --color-black: #000;
  --portfolio-button-color: #f5f4fa;
  --border-bottom-color: #ececec;
  --border-cards-color: #eeeeee;
}
*,
*::before,
*::after {
  box-sizing: border-box;
}
ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
h1,
h2,
h3,
p {
  margin: 0;
  padding: 0;
}
a {
  text-decoration: none;
}
.container {
  width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 15px;
  padding-right: 15px;
}
body {
  font-family: 'Roboto', sans-serif;
}
/* Шапка */
.header .logo,
.footer .logo {
  font-family: 'Raleway', sans-serif;
  font-weight: 700;
  font-size: 26px;
  letter-spacing: 0.03em;
}
header {
  padding-top: 31px;
  padding-bottom: 31px;
  border-bottom: 1px solid var(--border-bottom-color);
}
.header-container {
  display: flex;
}
.header .logo {
  margin-right: 93px;
}
.main-menu {
  display: flex;
}
.banner {
  text-align: center;
  padding-top: 200px;
  padding-bottom: 200px;
}
.banner .button {
  margin-top: 45px;
}
.accent {
  color: var(--accent-color);
}
.studio-black {
  color: var(--color-black);
}
.site-nav {
  display: flex;
}
.site-nav .item + .item {
  margin-left: 50px;
}
.site-nav a {
  color: var(--headers-color);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.02em;
}
.site-nav a:hover,
.site-nav a:focus {
  color: var(--accent-color);
}
.header .info {
  display: flex;
  margin-left: auto;
}
.header .info a {
  color: var(--text-color);
}
.info a:hover,
.info a:focus {
  color: var(--accent-color);
}
.info .mail-item {
  margin-right: 50px;
}
.section {
  padding-top: 94px;
}
.our-team {
  padding-bottom: 94px;
}
/* Банер */
.banner,
.footer {
  background-color: var(--background-color);
}
.banner .title {
  color: var(--color-white);
  font-weight: 900;
  font-size: 44px;
  line-height: 136%;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-align: center;
}
.banner .button {
  padding: 19px 32px;
  color: var(--color-white);
  background-color: var(--accent-color);
  border: 1px solid var(--accent-color);
  border-radius: 4px;
  cursor: pointer;
  font-weight: 700;
  font-size: 16px;
  line-height: 187%;
  letter-spacing: 0.06em;
  text-align: center;
}
/* Заголовки і тексти */
h3 {
  color: var(--headers-color);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
p {
  color: var(--text-color);
  font-weight: 400;
  font-size: 14px;
  line-height: 171%;
  letter-spacing: 0.03em;
}
.advantages,
.do-img {
  display: flex;
}
.do-img .img + .img {
  margin-left: 30px;
}
.what-we-do {
  padding-bottom: 94px;
}
.what-we-do .title,
.our-team .title {
  color: var(--headers-color);
  font-weight: 700;
  font-size: 36px;
  letter-spacing: 0.03em;
  text-align: center;
  margin-bottom: 50px;
}
.cards-team {
  display: flex;
  text-align: center;
}
.cards-team .item + .item {
  margin-left: 30px;
}
.our-team {
  background-color: var(--background-our-team-color);
}
.our-team h3 {
  font-weight: 500;
  font-size: 16px;
  letter-spacing: 0.03em;
  text-align: center;
  margin-top: 30px;
  margin-bottom: 10px;
}
.our-team p {
  font-size: 16px;
  letter-spacing: 0.03em;
  text-align: center;
}
/* Футер */
.footer {
  padding: 60px 0;
}
.studio-white {
  color: var(--color-white);
}
.footer-logo {
  display: inline-block;
  margin-bottom: 20px;
}
.address {
  color: var(--color-white);
  font-style: normal;
  font-weight: 400;
  font-size: 14px;
  line-height: 171%;
  letter-spacing: 0.03em;
}
.footer-info a {
  color: var(--info-footer-color);
  font-weight: 400;
  font-size: 14px;
  line-height: 171%;
  letter-spacing: 0.03em;
}
.footer-mail {
  margin: 9px 0;
}
/* сторінка портфоліо */
.cards {
  display: flex;
  flex-wrap: wrap;
}
.cards .element{
  margin-right: 30px;
  margin-bottom: 30px;
}
.cards .element:nth-child(3n) {
  margin-right: 0;
}
.cards .element:nth-last-child(-n+3) {
  margin-bottom: 0;
}
.cards h2 {
  color: var(--headers-color);
  font-weight: 700;
  font-size: 18px;
  line-height: 200%;
  letter-spacing: 0.06em;
  margin-bottom: 25px;
}
.cards p {
  font-weight: 400;
  font-size: 16px;
  line-height: 187%;
  letter-spacing: 0.03em;
}
.cards-lowpart {
  max-width: 370px;
  padding: 31px 24px 30px 24px;
  border: 1px solid var(--border-cards-color);
  border-top: none;
}
.img-cards {
  display: block;
}
.portfolio-section {
  padding: 94px 0;
}
.main .button {
  background-color: var(--portfolio-button-color);
  color: var(--headers-color);
  border: 1px solid var(--portfolio-button-color);
  border-radius: 4px;
  font-weight: 500;
  font-size: 16px;
  line-height: 162%;
  letter-spacing: 0.03em;
  text-align: center;
  margin-bottom: 50px;
}
.main-buttons {
  display: flex;
  gap: 8px;
  justify-content: center;
}
.main .button:hover,
.main .button:focus {
  background-color: var(--accent-color);
  color: var(--color-white);
  cursor: pointer;
}