* {
  margin: 0;
  padding: 0;
}

.socials {
  display: none;
}

.navbar {
  display: none;
}

.dropdown-menu {
  display: flex;
  flex-direction: column;
  width: 100vh;
  height: 100vh;
  position: fixed;
  bottom: 0;
  top: 0;
  padding-bottom: 40px;
}

.ax {
  font-family: 'Inter', sans-serif;
  padding-top: 20px;
  padding-left: 10px;
  padding-right: 10px;
  margin-top: 10px;
  margin-left: 10px;
  margin-right: 20px;
  font-weight: 600;
  font-size: 32px;
  line-height: 44px;
  color: #ff4500;
}

.xmark {
  margin-left: 320px;
  margin-top: 22px;
}

.hide {
  display: none;
}

.popup {
  position: fixed;
  top: 0;
  width: 100vw;
  height: 100vh;
  background-color: white;
  border: 15px solid #c1c7d0;
}

#introduction {
  background-image: url("images/color-mobile.png");
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
  background-size: 100% 100%;
}

.hello {
  color: #ff6347;
  font-family: sans-serif;
  margin-top: 30px;
  margin-left: 5px;
}

.topic {
  width: 350px;
  margin-left: 5px;
}

.topic1 {
  color: #ff4500;
  font-family: sans-serif;
  font-weight: bolder;
}

.text {
  margin-top: 10px;
  margin-left: 5px;
  padding-left: 10px;
  width: 350px;
  border: solid 2px white;
}

.text1 {
  color: #696969;
  margin-bottom: 10px;
}

.date {
  font-family: sans-serif;
  margin-top: 10px;
  margin-left: 10px;
}

.date1 {
  color: #696969;
}

.location {
  color: #696969;
  margin-bottom: 0;
  margin-left: 10px;
  padding-bottom: 30px;
}

#programme {
  background-color: #222;
  padding-bottom: 20px;
}

.prog {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding-top: 30px;
  padding-bottom: 30px;
}

.prog1 {
  color: white;
}

.lectures {
  display: flex;
  flex-direction: row;
  justify-content: flex-end;
  background-color: #434242;
  margin-bottom: 10px;
  margin-left: 10px;
  margin-right: 10px;
}

.img1 {
  margin-top: 10px;
  width: 70px;
  height: 70px;
}

.sub1 {
  color: #ff4500;
  padding-top: 20px;
  padding-right: 12px;
  padding-left: 10px;
}

.para1 {
  width: 150px;
  margin-left: 80;
  display: flex;
  justify-content: flex-end;
}

.presentation {
  display: flex;
  flex-direction: row;
  justify-content: flex-end;
  background-color: #434242;
  margin-bottom: 12px;
  margin-left: 10px;
  margin-right: 10px;
}

.img2 {
  margin-top: 10px;
  width: 70px;
  height: 70px;
}

.sub2 {
  color: #ff4500;
  padding-top: 20px;
  padding-right: 12px;
  padding-left: 10px;
}

.para2 {
  width: 150px;
  margin-left: 80;
  display: flex;
  justify-content: flex-end;
}

.meet {
  display: flex;
  flex-direction: row;
  justify-content: flex-end;
  background-color: #434242;
  margin-bottom: 10px;
  margin-left: 10px;
  margin-right: 10px;
}

.img3 {
  margin-top: 10px;
  width: 70px;
  height: 70px;
}

.sub3 {
  color: #ff4500;
  padding-top: 20px;
  padding-right: 60px;
  padding-left: 10px;
}

.para3 {
  width: 150px;
  margin-left: 80;
  display: flex;
  justify-content: flex-end;
}

.connect {
  display: flex;
  flex-direction: row;
  justify-content: flex-end;
  background-color: #434242;
  margin-bottom: 10px;
  margin-left: 10px;
  margin-right: 10px;
}

.img4 {
  margin-top: 10px;
  width: 70px;
  height: 70px;
}

.sub4 {
  color: #ff4500;
  padding-top: 20px;
  padding-right: 20px;
  padding-left: 10px;
}

.para4 {
  width: 150px;
  margin-left: 80;
  display: flex;
  justify-content: flex-end;
}

.texts {
  color: white;
}

.btn {
  display: flex;
  margin-left: 100px;
  margin-top: 40px;
  margin-bottom: 40px;
  background-color: #ff4500;
}

.see {
  display: none;
}

.f-topica {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.f-topic {
  display: flex;
  justify-content: center;
  font-weight: bold;
  color: #434242;
  margin-top: 30px;
}

.speaker {
  display: flex;
  flex-direction: row;
  justify-content: center;
  margin-bottom: 20px;
  margin-top: 20px;
  margin-right: 5px;
  padding-top: 20px;
  padding-bottom: 20px;
}

.checked {
  position: absolute;
  z-index: -1;
  width: 100px;
  height: 100px;
}

.f-img {
  position: relative;
  z-index: 1;
  margin-left: 5px;
  margin-right: 15px;
}

.f-speak {
  padding-left: 20px;
  padding-top: 20px;
  width: 150px;
  height: 150px;
}

.f-title {
  font-weight: bold;
  color: #434242;
}

.f-para {
  color: tomato;
}

.f-hide {
  display: none;
}

.btn-f {
  color: #434242;
  background-color: white;
  border: 1px solid #434242;
  width: 300px;
  height: 50px;
  margin-bottom: 30px;
  margin-left: 25px;
  border-radius: 8px;
}

.down {
  margin-left: 30px;
}

#partners {
  display: block;
  background-color: #696969;
}

.partner-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: white;
  padding-top: 20px;
  padding-bottom: 30px;
}

.partner-imgs {
  display: flex;
  flex-direction: row;
}

.partner-img {
  width: 150px;
  height: 150px;
}

.copy {
  display: flex;
  flex-direction: row;
  justify-content: center;
  color: #454647;
  padding-top: 30px;
  padding-bottom: 20px;
}

.footer-logo {
  width: 50px;
  height: 50px;
  padding-right: 20px;
  padding-top: 20px;
}

.c-f {
  display: flex;
  flex-direction: column;
}

.copy-footer {
  padding-top: 10px;
  padding-left: 20px;
}

/* ....///desktop css...// */
@media screen and (min-width: 768px) {
  #introduction {
    background-image: url("images/color.png");
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: 100% 100%;
  }

  .socials {
    display: flex;
    width: 100vw;
    height: 30px;
    background-color: #454647;
  }

  .socials1 {
    display: flex;
    flex-direction: row;
    list-style: none;
    margin-left: 900px;
  }

  .icon {
    margin-right: 30px;
  }

  .social-text {
    color: white;
  }

  .navbar {
    display: flex;
    flex-direction: row;
  }

  #navbarSupportedContent {
    padding-left: 320px;
  }

  .nav-item {
    padding-left: 20px;
    padding-right: 20px;
  }

  .nav-show {
    margin-left: 20px;
    border: solid 3px #ff4500;
  }

  .home {
    color: #ff4500;
  }

  .art {
    width: 200px;
    height: 50px;
    margin-left: 200px;
  }

  .nv {
    color: #454647;
  }

  .dropdown-button {
    display: none;
  }

  .intro-texts {
    width: 80vw;
  }

  .hello {
    margin-left: 300px;
    font-size: 40px;
  }

  .topic {
    width: 890px;
  }

  .topic1 {
    margin-left: 300px;
    font-size: 60px;
    font-weight: bolder;
  }

  .text {
    width: 780px;
    margin-left: 320px;
    background-color: white;
    margin-top: 30px;
    margin-bottom: 40px;
  }

  .date {
    width: 780px;
    margin-left: 320px;
  }

  .date1 {
    font-weight: bold;
    font-size: 30px;
  }

  .location {
    width: 780px;
    margin-left: 320px;
    font-size: 25px;
  }

  .progos {
    display: flex;
    flex-direction: row;
    margin-left: 10px;
  }

  .progo {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 300px;
    height: 300px;
  }

  .texts {
    display: flex;
    text-align: center;
  }

  .btn {
    display: none;
  }

  .see {
    display: flex;
    flex-direction: row;
    justify-content: center;
    text-decoration: underline;
    color: white;
    padding-top: 50px;
    padding-bottom: 50px;
  }

  .speakers {
    display: flex;
    flex-wrap: wrap;
    margin-right: 40px;
  }

  .speaker {
    display: flex;
    flex-direction: row;
    width: 600px;
    padding-left: 100px;
  }

  .f-para2 {
    color: #454647;
  }

  .btn-f {
    display: none;
  }

  .partner-imgs {
    display: flex;
    flex-direction: row;
    justify-content: center;
    padding-bottom: 20px;
  }

  .partner-img {
    width: 150px;
    height: 150px;
    padding-left: 30px;
    padding-right: 30px;
  }
}