@import url('https://fonts.googleapis.com/css?family=Roboto|Suez+One');

* {
  margin: 0;
  padding: 0;
  outline: none;
}

body, html {
  width: 100%;
  height: 100%;
}

body {
  background-color: #F0FFFF;
  font-family: Trebuchet MS, Helvetica;
}

/* Шапка сайта */

header {
  width: 100%;
  padding: 10px 0.5% 0px 0.5%;
  background: transparent;
  float: left;
  position: fixed;
}

header #logo {
  color: #fff;
  cursor: pointer;
}

header #logo span {
  font-size: 1.7em;
  line-height: 45px;
  margin-left: 40px;
  font-family: 'Suez One', serif;
}

@media (min-width: 701px) {
  #logo {
    float: left;
    width: 30%;
    font-size: 1.1em;
  }

  #about {
    float: right;
    width: 67%;
  }
}

@media (max-width: 700px) {
  #logo {
    margin-top: 15px;
    width: 100%;
    font-size: 1.5em;
  }

  #about {
    float: left;
    width: 100%;
  }
}

#about {
  text-align: center;
  font-size: 1em;
  line-height: 40px;
  margin-bottom: 10px;
}

#about > a {color: #fff}

#about > a:hover {
  color: #b0b0b0;
  text-decoration: underline;
}

#about > a:not(:last-child) {
  margin-right: 7%;
}

/* Стили для фиксированной шапки */

.fixed {
  z-index: 5000;
  background-color: #fff;
  border-bottom: 1px solid silver;
}

header.fixed #logo {
  color: #343434;
}

.fixed #about a {color: #343434}
.fixed #about a:hover {color: #7c7c7c}

/* Главный блок на сайте */

#top {
  width: 100%;
  background-image: url(https://etosibir.ru/wp-content/uploads/2021/07/Rossiya-141-delta-volgi1.jpg);
  background-blend-mode: multiply;
  background-color: #FFFFFF;
  background-size: cover;
  text-align: center;
  color: #FFFFFF;
}

@media (min-width: 1001px) {
  #top {
    font-size: 3em;
    height: 1000px;
  }
}

@media (max-width: 1000px) and (min-width: 651px) {
  #top {
    font-size: 2em;
    height: 600px;
  }
}

@media (max-width: 650px) {
  #top {
    font-size: 1.3em;
    padding-top: 50%;
    height: 500px;
  }
}

@media (max-width: 450px) {
  #top {
    font-size: 0.9em;
  }
}

#top h1 {
  padding-top: 20%;
}

#top h3 {
  color: #ccc;
}

#main {
  float: left;
  background-color: #f6f6f6;
  border-top: 2px solid silver;
  color: #484848;
  font-size: 1.3em;
}

@media (min-width: 1401px) {
  #main {
    padding: 100px 20%;
    width: 60%;
  }
}

@media (max-width: 1400px) {
  #main {
    padding: 100px 10%;
    width: 80%;
  }
}

@media (max-width: 700px) {
  #main div {
    width: 98%!important;
    margin-bottom: 20px;
  }
}

#main div {
  width: 48%;
  margin-right: 2%;
  float: left;
}

#main h2 {font-size: 3em}
#main ul {color: #000000}

p{
  text-align: center;
}