/*Спецификация*/
html {
	font-size: 15px;

}
body {
    font-family: "Open Sans";
    margin: 0;
    padding: 0;
}
div, p, input, button, form, textarea, a {
  box-sizing: border-box;
}
a, a:hover, a:active, a:focus,
button, input, button:hover, button:active, button:focus,
input:focus, input:active {
	text-decoration: none;
	outline: none;
}

h2 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  margin-bottom: 42px;
}

ul, li{
  display: block;
  padding: 0;
  margin: 0;
}
button {
  width: 227px;
  height: 72px;
  color: #fff;
  background: #00897b;
  font-size: 1.333rem;
  text-transform: uppercase;
  border: 0;
}
.button {
  padding-top: 23px;
    display: inline-block;
    text-decoration: none;
    width: 201px;
    height: 73px;
    color: #fff;
    background: #00897b;
    font-size: 1.333rem;
    text-transform: uppercase;
}

.d-flex {
  display: -webkit-flex;
  display: -moz-flex;
  display: -ms-flex;
  display: -o-flex;
  display: flex;
}
.text {
  text-align: center;
}
.container {
  margin-right: auto;
  margin-left: auto;
  max-width: 1140px;
}
div, p, input, button, form {
  box-sizing: border-box;
}

/*Шапка*/

header {
  background: url(../img/pexel.jpg) no-repeat center;
}

.menu {
  background: #fff;
}
.menu_blok {
  justify-content: space-between;
  padding-top: 38px; 
  padding-bottom: 38px;
}
nav li {
  margin-right: 40px;
}
nav li:hover {
  color:  #00897b;
} 
.logo {
  font-size: 1.667rem;
  font-weight: 700;
}
nav {
  font-size: 1.333rem;
  font-weight: 600;
  letter-spacing: 1px;
  
}
.first {
  text-align: center;
  color: #fff;
  height: 650px;
  background-color: rgba(0, 0, 0, 0.8);
  padding: 140px 0;
}
h1 {
  
  font-size: 4rem;
  margin: 0;
  font-weight: 600;
  letter-spacing: 3px;
}
.first p {
  padding-bottom: 13%;
  font-size: 1.467rem;
  letter-spacing: 1.1px;
}

/* О нас*/
.about {
  padding: 72px 0;
}
.about__p {
  width: 620px;
  margin: 0 auto 30px;
  letter-spacing: 0.75px;
}

.promo {
  max-width: 280px;
  letter-spacing: 0.75px;
}
/*Портфолио*/
.portfolio {
  background: #e4fdf9;
  padding: 72px 0;
}
.work__item {
  position: relative;
  width: 370px;
  height: 370px;
}
.work__details {
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
   background: rgba(0,0,0,0.56);
    color: #fff;
    text-align: center;
    padding-top: 170px;
    font-size: 1.250rem;
    opacity: 0;
}
.work__item:hover .work__details {
  opacity: 1;
}


/*Контакты*/

.contact {
    background: #000;
    color: #fff;
    padding: 40px 0;
    font-size: 1.333rem;
    font-weight: 600;
    letter-spacing: 1px;
   
}
.contact p {
   line-height: 10px;
}
.justify {
  justify-content: space-between;
}
.justify_content {
  justify-content: space-around;
}
.circle {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: #00897b;
  padding-top: 10px;
  margin: 0 auto;
  line-height: 127px;
}
.circle_three {
  line-height: 118px;
}
form {
  margin: 20px;
}
input {
  background: #fff;
  width: 495px;
  height: 88px;
  border: none;
  margin-bottom: 10px;
  font-size: 1.333rem;
  padding: 10px;
}
 textarea {
  width: 1000px;
  height: 500px;
  font-size: 1.333rem;
  padding: 10px;

}
/*Футур*/
footer{
  text-align: center;
  font-size: 1.333rem;
  font-weight: 700;
  letter-spacing: 1px;
  padding: 10px 0;
}
#loader {
    position: fixed;
    left: 0px;
    top: 0px;
    width: 100%;
    height: 100%;
    background: rgba(240, 240, 240, 0.91);
    overflow: hidden;
    display: none;
}

#loader img {
    position: absolute;
    width: 50px;
    height: 50px;
    left: 50%;
    margin-left: -25px;
    top: 50%;
    margin-top: -25px;
}

#overlay {
    display: none;
    /*position: absolute;*/
    position: fixed;
    top: 0px;
    width: 100%;
    height: 100%;
    background: #000c;
    left: 0px;
    cursor: pointer;
}
#thx {
    background: #fff;
    position: absolute;
    left: 50%;
    margin-left: -170px;
    top: 50%;
    padding: 30px;
    margin-top: -20px;
}

@media screen and (max-width: 1170px) {

  .work__item {
  width: 300px;
  height: auto;
}
.work__item img {
  width: 100%;
  height: auto;
}
.container {
    max-width: 960px;
}
input {
  width: 44%;
  }
textarea
{
  width: 90%;
} 
}
@media screen and (max-width: 963px) {
  .logo {
    margin-left: 15px;
  }

}
@media screen and (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }
  .container {
    width: 100%;
  }
  .about__p {
    width: 90%;
  }

  .promo {
    display: block;
  }
  .work__item {
    display: block;
    width: 80%;
  }
  .work__item img {
     display: block;

  }
  .contact {
   font-size: 1.1rem;
  }

  input {
    max-width: 90%;
  }
  textarea {
    max-width: 90%;

  }
  
}

@media screen and (max-width: 500px) {
  nav {
    display: none;
  }
  .d-flex {
    display: inherit;
  } 
  .promo {
    margin-left: auto;
    margin-right: auto;
  }
  .work__item {
    margin: 0 auto 15px;
  }
  .work__details {
    display: none;
  }
}