main.css

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

:root {
  --primary-color: #f44c2e;
  --primary-color--darken: #da2a0b;
  --gray-text-color: #bac0cf; 
  --container: calc((100% - 960px) / 2);
}

body {
  margin: 0;
  font-family: Helvetica, Arial, sans-serif;
  font-size: 16px;
  font-weight: normal;
  font-style: normal;
}

.page {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.header {
  padding: 25px var(--container);
  display: flex;
  align-items: center;
  background-color: #fbfbfb;
}

.header__nav {
  margin-right: auto;
}

.header__phone {
  font-size: 20px;
  font-weight: 600;
  margin-right: 25px;
}

.main {
  flex: 1;
}



.title {
  margin: 0;
  font-size: 30px;
  font-weight: 800;
}



.button {
  background-color: var(--primary-color);
  border: none;
  color: #fff;
  padding: 12px 30px;
  font-size: 16px;
  cursor: pointer;
  transition: all 300ms ease;
}

.button:hover {
  background-color: var(--primary-color--darken);
}

.button--outlined {
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
  background-color: transparent;
}

.button--outlined:hover {
  background-color: var(--primary-color);
  color: #fff;
}






.nav {
  display: flex;
}

.nav__link {
  text-decoration: none;
  color: #000;
  position: relative;
  transition: color 300ms ease;
}

.nav__link::after {
  content: '';
  position: absolute;
  width: 0%;
  height: 1px;
  background-color: var(--primary-color);
  bottom: -2px;
  left: 0;
  transition: width 300ms ease;
}

.nav__link:hover {
  color: var(--primary-color);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__link:not(:last-child) {
  margin-right: 20px;
}

.nav--vertical {
  flex-flow: column;
}

.nav--vertical .nav__link::after {
  display: none;
}

.nav--vertical .nav__link {
  margin-bottom: 10px;
}



.hero {
  position: relative;
  background-color: #fbfbfb;
  padding: 120px var(--container) 150px;
  background-image: url('./img/Dmitry Alekseev.png');
  background-size: 450px;
  background-repeat: no-repeat;
  background-position: calc(50% + 420px) bottom;
}

.hero__title {
  font-size: 46px;
  font-weight: 800;
  margin: 0 0 10px;
}

.hero__subtitle {
  font-size: 16px;
  font-weight: 500;
  margin: 0 0 30px;
  color: var(--gray-text-color);
}




.services {
  padding: 60px var(--container);
  text-align: center;
}

.services__title {
  margin-bottom: 50px;
}

.services__items {
  display: flex;
  margin: 0 -20px 50px;
}

.services__item {
  text-align: center;
  position: relative;
  padding: calc(74px + 15px) 0 0 0;
  margin: 0 20px;
}

.services__item::before {
  content: '';
  position: absolute;
  top: 0;
  left: calc(50% - 74px / 2);
  width: 74px;
  height: 74px;
  background-position: center;
  background-size: contain;
  background-repeat: no-repeat;
}

.services__item:nth-child(1)::before {
  background-image: url('./img/icons/tools-and-utensils.png');
}

.services__item:nth-child(2)::before {
  background-image: url('./img/icons/responsive.png');
}

.services__item:nth-child(3)::before {
  background-image: url('./img/icons/programming.png');
}

.services__item:nth-child(4)::before {
  background-image: url('./img/icons/coding (1).png');
}

.services__desc {
  color: var(--gray-text-color);
}






.portfolio {
  padding: 50px var(--container);
  text-align: center;
  background-color: #fbfbfb;
}

.portfolio__title {
  margin-bottom: 50px;
}

.portfolio__items {
  display: flex;
  margin: 0 -10px 50px;
}

.portfolio__item {
  margin: 0 10px;
}

.portfolio__img {
  width: 100%;
}

.portfolio__desc {
  color: var(--gray-text-color);
  font-size: 16px;
  font-weight: normal;
}





.price {
  background-color: var(--primary-color);
  padding: 50px var(--container);
  color: #fff;
}

.price__title {
  margin-bottom: 30px;
}

.text-gray {
  color: var(--gray-text-color);
}




.contacts {
  padding: 50px var(--container);
  display: flex;
  justify-content: space-between;
}

.contacts__data-item {
  font-size: 18px;
  margin: 0 0 20px;
  position: relative;
  padding-left: 30px;
}

.contacts__data-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
}

.contacts__data-item::before {
  width: 18px;
  height: 18px;
  background-image: url('./img/icons/call-answer (1).png');
}

.contacts__data-item:nth-child(2)::before {
  width: 23px;
  height: 15px;
  top: 2px;
  background-position: center;
  background-image: url('./img/icons/envelope (1).png');
}

.contacts__button {
  margin-bottom: 30px;
}

.contacts__social {
  display: flex;
  justify-content: space-between;
}

.contacts__link {
  width: 25px;
  height: 25px;
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
}

.contacts__link--vk {
  background-image: url('./img/icons/vk (1).png');
}

.contacts__link--fb {
  background-image: url('./img/icons/facebook-logo (1).png');
}

.contacts__link--tw {
  background-image: url('./img/icons/twitter-logo-silhouette.png');
}

.contacts__link--inst {
  background-image: url('./img/icons/instagram-social-network-logo-of-photo-camera.png');
}




.footer {
  text-align: center;
  color: #fff;
  background-color: #31293c;
  padding: 25px;
}




@media (max-width: 1000px) {
  :root {
    --container: 20px;
  }

  .hero {
    background-position: 100%;
  }
}

@media (max-width: 750px) {
  .hero {
    background-image: none;
  }
}

@media (max-width: 700px) {
  .header {
    flex-flow: column;
  }

  .header__nav {
    margin: 0 0 20px;
  }

  .header__phone {
    margin: 0 0 20px;
  }


  .services__item {
    max-width: 300px;
    margin-bottom: 30px;
  }

  .services__items {
    flex-wrap: wrap;
  }
}

@media (max-width: 680px) {
  .services__items {
    justify-content: center;
  }


  .contacts {
    flex-flow: column;
    align-items: center;
  }

  .contacts__nav,
  .contacts__data {
    margin-bottom: 30px;
  }
}

@media (max-width: 540px) {
  .portfolio__items {
    flex-flow: column;
  }

  .portfolio__item {
    margin-bottom: 30px;
  }
}