body{
  font-family: Roboto, sans-serif;
  font-size: 14px;
}

header {
  min-height: 450px;
  padding-top: 20px;
  padding-bottom: 20px;
  background: url('../img/header_bg.jpg') 0% 0%;
  background-size: cover;
}

.logo {
  text-align: center;
}

.logo img {
  width: 120px;
}

.phones-header {
  visibility: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: flex-end;
  height: 64px;
}

.phones-header a {
  text-shadow: 1px 1px #474343, 1px -1px #474343, -1px 1px #474343, -1px -1px #474343;
  font-size: 1.2em;
  color: #fff;
}

header h1 {
  text-align: center;
  font-size: 2em;
  font-weight: bold;
  color: #fff;
}

header h1 span {
  color: #48c5fd;
}

header h2 {
  text-shadow: 1px 1px #474343, 1px -1px #474343, -1px 1px #474343, -1px -1px #474343;
  text-align: center;
  font-size: 1.5em;
  font-style: italic;
  color: #fff;
}

.link-group {
  text-align: center;
}

.link-group a {
  width: 180px;
  padding: 5px 0;
  display: inline-block;
  border-radius: 4px;
  background: #48c5fd;
  color: #fff;
  text-transform: uppercase;
}

.link-group p {
  display: flex;
  justify-content: center;
  margin: 5px;
  color: #fff;
}

.link-group p::after,
.link-group p::before {
  position: relative;
  top: 10px;
  display: block;
  content: "";
  width: 100px;
  border-top: 1px solid #fff;
}

.features h2 {
  font-size: 2rem;
  text-align: center;
  color: #421d0a;
}

.features h3 {
  font-size: 1.5rem;
  text-align: center;
  color: #421d0a;
}

.product p,
.features p {
  text-indent: 2rem;
  text-align: justify;
}

.product h2,
.popular {
  text-align: center;
}

.product h2,
.popular h2 {
  font-size: 2em;
  padding-bottom: 20px;
  color: #421d0a;
}

.product p {
  margin: 5px;
  font-size: 1.2em;
}

.popular img {
  height: 250px;
}

.bulb_title {
  margin: 0;
  font-size: 1.2em;
}

.price {
  margin: 5px 0 10px;
  font-size: 1.4em;
  font-weight: bold;
  color: red;
}

.diller-price {
  font-size: 1.4em;
  color: red;
}

.catalog-item {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  margin-bottom: 10px;
}

.catalog-item a {
  width: 180px;
  padding: 5px 0;
  display: inline-block;
  border-radius: 4px;
  background: #48c5fd;
  color: #fff;
  text-transform: uppercase;
}

.catalog-item a:hover {
  background: red;
}

.link-more {
  text-align: right;
}

.link-more a {
  font-size: 1.2em;
  margin: 10px 20px;
}

.link-more a:hover {
  text-decoration: underline;
}

.feedback {
  text-align: center;
}

.feedback h2 {
  font-size: 2em;
  text-align: center;
  color: #421d0a;
}

#zayavkaName,
#applicationTelephone {
  margin-bottom: 0;
}

.feedback textarea {
  height: 100px;
  margin-bottom: 10px;
}

.feedback form button {
  padding: 5px 20px;
  display: inline-block;
  border-radius: 4px;
  background: #ed0909;
  color: #fff;
  text-transform: uppercase;
}

footer {
  margin-top: 20px;
  background: #48c5fd;
  color: #fff;
}

footer .row {
  margin-bottom: 0;
}

footer h5 {
  font-size: 1.4em;
  font-weight: bold;
}

footer a {
  color: #000;
}

footer .phone-links a {
  display: block;
  color: #fff;
}

@media only screen and (min-width: 480px) {
  header h1 {
    font-size: 2.6em;
  }

  header h2 {
    font-size: 1.8em;
  }

  .feedback {
    display: flex;
    justify-content: center;
  }

  .feedback form {
    width: 80%;
  }
}

@media only screen and (min-width: 601px) {
  .logo {
    text-align: left;
  }

  .phones-header {
    visibility: visible;
  }
}

@media only screen and (min-width: 650px) {
  .popular-items {
    display: flex;
    justify-content: space-between;
    margin-bottom: 30px;
  }

  .feedback form {
    width: 70%;
  }
}

@media only screen and (min-width: 800px) {
  .popular-items {
    justify-content: space-around;
  }
}

@media only screen and (min-width: 900px) {
  header {
    padding-top: 50px;
    padding-bottom: 70px;
  }

  header h1 {
    margin-top: 100px;
    font-size: 4em;
  }

  header h2 {
    font-size: 3em;
  }

  .link-group {
    margin-top: 50px;
  }

  .link-group a {
    width: 240px;
    padding: 5px 20px;
    border-radius: 4px;
    font-size: 1.4em;
  }

  .link-group p {
    margin: 10px;
    font-size: 1.2em;
  }

  .link-group p::after,
  .link-group p::before {
    top: 13px;
    width: 200px;
  }

  .features h3 {
    font-size: 2.2em;
  }

  .features p {
    font-size: 1.4em;
  }
}

@media only screen and (min-width: 990px) {
  .feedback form {
    width: 50%;
  }
}