body {
  background-color: white;
  font-family: Ubuntu, sans-serif;
  font-size: 16px;
  color: #828282;
  font-weight: normal;
  min-width: 320px;
}
a {
  font-family: Montserrat, sans-serif;
  font-weight: bold;
  font-size: 17px;
  color: #2cc7c1;
}
a:hover{
  color: #2cc7c1;
}
img {
  max-width: 100%;
  height: auto;
}
section {
  position: relative;
}
h2 {
  font-family: Montserrat, sans-serif;
  font-size: 30px;
  margin-top: 0;
  text-transform: uppercase;
}

/*header*/
#header {
  background: url("../img/3617.jpg") center no-repeat;
  background-size: cover;
  height: 100vh;
  min-height: 500px
}

.section-table {
  display: table;
  height: 100%;
  width: 100%;
}
.section-row {
  display: table-row;
}
.section-cell {
  display: table-cell;
  text-align: center;
  vertical-align: middle;
}
.section-center {
  max-width: 615px;
  display: inline-block;
}
#header h1 {
  font-family: Montserrat, sans-serif;
  font-size: 31px;
  color: white;
  text-transform: uppercase;
}
#header p {
  font-family: Ubuntu, sans-serif;
  font-size: 20px;
  color: white;
}
/*кнопки в хедер*/
.btn {
  font-family: Montserrat, sans-serif;
  font-size: 17px;
  padding: 10px 20px;
  margin: 0 15px;
  border: none;
  color: white;
  transition-duration: .3s;
}
.btn-primary {
  background-color: #7ea4e8;
}
.btn-primary:hover {
  background-color: #6787c2;
}
.btn-dark {
  background-color: #6a7079;
}
.btn-dark:hover {
  background-color: #474c52;
}
/*спикеры*/
#speakers {
  padding: 90px 0;
  border-bottom: 2px solid #f0f0f1;
  color: #828689;
  line-height: 26px;
}
.large {
  color: #828282;
  font-size: 22px;
  margin-bottom: 20px;
}
/*спикеры вкладки ()*/
.section-tabs {
  border: 3px solid #ececec;
  border-radius: 2px;
}
.section-tabs .nav-tabs .nav-link, .nav-tabs .nav-item.show .nav-link {
  background-color: #ececec;
  color: #6a7079;
  font-size: 18px;
  font-family: Ubuntu, sans-serif;
  font-weight: bold;
  border-radius: 0;
  border: none;
}
.nav-tabs .nav-link.active, .nav-tabs .nav-item.show .nav-link {
  background-color: white;
  color: #9097a1;
  font-weight: bold;
}
.tab-content {
  padding: 10px;
}
/*спикер*/
#speakers .section-tabs .tab-content i {
  color: #2cc7c1;
  padding-right: 16px;
  padding-left: 18px;
  font-size: 14px;
}
#speakers .section-tabs .tab-content li {
  padding-left: 18px;
  line-height: 40px;
}

.speakers-head {
  margin: 100px 0 60px 0;
}
.speakers-head h2 {
  color: #6a7079;
  text-transform: uppercase;
}
.speakers-head .large {
  color: #828689;
}
.speakers .item h3 {
  text-transform: uppercase;
  color: #777a7d;
}
.speakers-footer {
  margin-top: 70px;
}
.speakers-footer p {
  color: #828282;
  font-size: 16px;
}
.speakers-footer {
  margin-top: 70px;
}
/*позиционирование для картинок при наведении*/
.item > div {
  position: relative;
}
.item > div:hover .front {
  opacity: .2;
}
.item > div:hover .back {
  opacity: 1;
}
.item > div:hover h3 {
  color: #6bd8d3;
  transition-duration: .7s;
}
.front {
  position: absolute;
  width: 140px;
  height: 140px;
  transition-duration: .7s;
  left: 50%; /*ie*/
  margin-left: -70px; /*ie*/
  cursor: pointer;
}
.back {
  width: 140px;
  height: 140px;
  background-color: #6bd8d3;
  color: white;
  display: inline-block;
  border-radius: 50%;
  font-size: 40px;
  opacity: 0;
}
.back i {
  line-height: 140px;
}

/*events*/
#events {
  padding: 90px 0;
}
.link {
  text-transform: uppercase;
}
#events .section-tabs .nav.nav-tabs {
  background-color: #ececec;
}


/*аккордеон*/
.time {
  background-color: #2cc7c1;
  font-size: 17px;
  font-weight: 500;
  border-radius: 2px;
  padding: 5px;
  color: white;
  margin-right: 25px;
}
.collapse-link {
  color: #747a84;
  font-weight: 500;
  font-size: 18px;
}
.collapse-link:hover {
  color: #747a84;
}
.collapse-state {
  color: #2cc7c1;
  font-size: 21px;
}
.card.card-body {
  color: #999;
  font-size: 17px;
}
.tab-collapse {
  margin-bottom: 20px;
}
/*video*/
#events .row.item {
  margin-top: 100px;
}
/*slide gallery*/
#gallerySlide .carousel-indicators li {
  border-radius: 50%;
  border: 3px solid #65d2ce;
  background-color: transparent !important;
  width: 13px;
  height: 13px;
}
#gallerySlide .carousel-indicators li.active {
  background: #65d2ce !important;
}
#gallerySlide .carousel-indicators li:not(.active) {
  opacity: 1;
}
#gallerySlide .carousel-indicators {
  justify-content: start;
  opacity: 1 !important;
  margin-right: 0;
  margin-left: 18px;
}


/*Форма*/
#form {
  padding: 90px 0;
  background: #f3f3f3;
}
.section-form {
  background: white;
  padding: 40px;
  border-radius: 2px;
  margin-top: 50px;
}
.section-form input,
.section-form select {
  height: 44px;
  background: #efefef;
  padding-right: 25px;
}
.was-validated .form-control:valid {
  box-shadow: none;
  border-color: #2cc7c1;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg width='1em' height='1em' viewBox='0 0 16 16' class='bi bi-check-circle-fill' fill='%232cc7c1' xmlns='http://www.w3.org/2000/svg'%3e%3cpath fill-rule='evenodd' d='M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0zm-3.97-3.03a.75.75 0 0 0-1.08.022L7.477 9.417 5.384 7.323a.75.75 0 0 0-1.06 1.06L6.97 11.03a.75.75 0 0 0 1.079-.02l3.992-4.99a.75.75 0 0 0-.01-1.05z'/%3e%3c/svg%3e");
}
.was-validated .form-control:invalid {
  box-shadow: none;
  border-color: red;
  background-image: url("data:image/svg+xml,%3Csvg width='1em' height='1em' viewBox='0 0 16 16' class='bi bi-x-circle-fill' fill='red' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath fill-rule='evenodd' d='M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0zM5.354 4.646a.5.5 0 1 0-.708.708L7.293 8l-2.647 2.646a.5.5 0 0 0 .708.708L8 8.707l2.646 2.647a.5.5 0 0 0 .708-.708L8.707 8l2.647-2.646a.5.5 0 0 0-.708-.708L8 7.293 5.354 4.646z'/%3E%3C/svg%3E");
}
.was-validated .form-control:valid:hover,
.was-validated .form-control:invalid:focus {
  box-shadow: none;
}
.ui-selectmenu-button.ui-button {
  width: 100%;
  /* line-height: 44px; */
}
.ui-button {
  padding: 0 0 0 18px;
}
.ui-selectmenu-text {
  line-height: 44px;
}

/*sponsors*/
#sponsors {
  background: white;
  padding: 60px 0;
}
/*footer*/
#contacts {
  background-color: #525b64;
  padding: 70px 0;
}
#contacts h4, h3 {
  color: white;
  margin: 0 0 25px;
  font-weight: normal;
}
#contacts span {
  font-weight: bold;
}
#contacts h4 {
  font-size: 20px;
}
#contacts p {
  font-size: 16px;
  color: #cdd0d2;
}
#contacts .contacts p {
  font-weight: 500;
  color: #2cc7c1;
}
#contacts .contacts i {
  padding-right: 5px;
}
#contacts .social img {
  padding-right: 15px;
}


#copy {
  background-color: #3f464c;
  line-height: 50px;
  color: #cacaca;
  font-size: 14px;
}
#copy p {
  opacity: 0.5;
}







/* Large Devices, Wide Screens */
@media only screen and (max-width : 1200px) {
  #events {
    padding-top: 20px;
    padding-bottom: 20px;
  }
  .link {
    display: block;
    margin-bottom: 20px;
  }
  #myForm .btn .fas.fa-chevron-circle-right {
    display: none;
  }
}

/* Medium Devices, Desktops */
@media only screen and (max-width : 992px) {
 .speakers-head, .speakers-footer {
   margin-top: 20px;
   margin-bottom: 20px;
 }
 #speakers {
   padding-top: 20px;
   padding-bottom: 20px;
 }
 #events .row.item {
   margin-top: 20px;
 }
 #sponsors {
   margin: 0;
 }
 #sponsors img {
   margin-bottom: 10px;
   margin-top: 10px;
 }
}


/* Small Devices, Tablets */
@media only screen and (max-width : 768px) {
  .item {
    margin-top: 30px;
  }
  .collapse-link {
    font-size: 15px;
  }
  #myForm .btn.btn-primary {
    margin-top: 7px;
  }
  #myForm .btn .fas.fa-chevron-circle-right {
    display: inline;
  }
}
/*vieo*/

/* Small Devices, Tablets */
@media only screen and (max-width : 600px) {
  #header h1 {
    font-size: 22px;
  }
  #header p {
    font-size: 16px;
  }
}


/* Extra Small Devices, Phones */
@media only screen and (max-width : 480px) {
  .collapse-link {
    font-size: 10px;
  }
  .collapse-state {
    font-size: 10px;
  }
  .time {
      font-size: 10px;
      margin-right: 3px;
      padding: 3px;
  }
}