body{
    background-image: url(/img/classroom-2093744_960_720.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment:fixed;
    height: 100%;
}

html {
  scroll-behavior: smooth;
}

#first_title{
    color: blueviolet;
    transition: 2s;
    position: relative;
    top: 5px;
    left: 60px;
    font-size: 45px;
}

#first_title:hover{
    color: black;
    transition: 2s;
}

.nav{
    position: fixed;
    top: 0;
    width: 100%;
    height: 200px;
    background: rgba(255, 255, 255, 0.897);
    box-shadow: 0px 2px 3px rgba(0, 0, 0, 0.4);
    z-index: 99999999999999;
}

#Courses{
    display: inline-flex;
    width: 200px;
    background-color: blueviolet;
    position: relative;
    color: black;
    text-decoration: none;
    transition: 0.8s;
    left: 45px;
    top: 10px;
    padding: 15px;
    font-weight: bold;
    justify-content: center;
    align-items: center;
    border-radius: 18px;
    border: 1px solid black;
    cursor: pointer;
}

#Olympiads{
    width: 200px;
    background-color: blueviolet;
    position: relative;
    color: black;
    text-decoration: none;
    transition: 0.8s;
    left: 45px;
    top: 10px;
    padding: 15px;
    font-weight: bold;
    border-radius: 18px;
    border: 1px solid black;
    cursor: pointer;
}
#Exams{
    width: 200px;
background-color: blueviolet;
position: relative;
color: black;
text-decoration: none;
transition: 0.8s;
left: 45px;
top: 10px;
padding: 15px;
font-weight: bold;
border-radius: 18px;
border: 1px solid black;
cursor: pointer;
}
#teachers{
    width: 200px;
background-color: blueviolet;
position: relative;
color: black;
text-decoration: none;
transition: 0.8s;
left: 45px;
top: 10px;
padding: 15px;
font-weight: bold;
border-radius: 18px;
border: 1px solid black;
cursor: pointer;
}
#StudentCouncil{
width: 200px;
background-color: blueviolet;
position: relative;
color: black;
text-decoration: none;
transition: 0.8s;
left: 45px;
top: 10px;
padding: 15px;
font-weight: bold;
border-radius: 18px;
border: 1px solid black;
cursor: pointer;
}
#Address{
width: 200px;
background-color: blueviolet;
position: relative;
color: black;
text-decoration: none;
transition: 0.8s;
left: 45px;
top: 10px;
padding: 15px;
font-weight: bold;
border-radius: 18px;
border: 1px solid black;
cursor: pointer;
}

#Courses:hover, #Olympiads:hover, #Exams:hover,#teachers:hover,#StudentCouncil:hover,#Address:hover{
    background-color: black;
    color: blueviolet;
}

.custom-select{
  position: relative;
  top: 350px;
  display: block;
}


#courses{
  color: aliceblue;
  font-size: 34px;
  position: relative;
  display: inline-block;
  left: 650px;
}

#courses_info
{
  color: red;
  font-size: 18px;
  position: relative;
  left: 260px;
  top: 50px;
}

.dropdown{
  display: none;
  
}

.show{
  display: none;
}

iframe{
position: relative;
left: 520px;
top: 100px;
display: block;
}

summary{
  font-size: 20px;
  color: blueviolet;
}

summary:hover{
    cursor: pointer;
}

h3{
  display: flex;
  color: blueviolet;
  font-size: 22px;
  position: relative;
  float: center;
  top: 100px;
  align-items: center;
  justify-content: center;
}


#olympiad_h2
{
  font-size: 34px;
  position: relative;
  top: 500px;
  left: 650px;
  color: aliceblue;
  display: inline-block;
}

#olimp_info
{
  display: flex;
  font-size: 34px;
  position: relative;
  top: 550px;
  left: 160px;
  color: aliceblue;
  display: inline-block;
}

#olymp_link{
  text-decoration: none;
  color: rgb(128, 0, 255);
  font-weight: 900;
  transition: 0.8s;}

#olymp_link:hover{
  color: red;
  transition: 0.8s;
  transform: scale(10px);
}

.exams_info{
  display: block;
  position: relative;
  top: 650px;
  background-color:rgba(255, 255, 255, 0.836);
  height: 360px;
}

.exams_info > h2{
  display: inline;
  position: relative;
  left: 650px;
  font-size: 34px;
  color: blueviolet;
}

.exams_info > a
{
  display: inline-block;
  position: relative;
  left: 200px;
  top: 50px;
  font-size: 24px;
  font-weight: bold;
  color: blueviolet;
  text-decoration: none;
  transition: 1.2s;
}

.exams_info > a:hover{
  color: black;
  transition: 1.2s;
}

.teachers
{
  display: block;
  position: relative;
  top: 700px;
  height: 360px;
  background-color:rgba(255, 255, 255, 0.836);
  height: 1200px;
}

.teachers > h2{
  display: inline;
  position: relative;
  left: 650px;
  font-size: 34px;
  color: blueviolet;
}

table
{
  color: blueviolet;
  font-size: 24px;
  font-weight: 900;
  border: 1px;
  border-color: black;
  position: relative;
  left: 450px;
}

.StudentCouncil{
  display: block;
  position: relative;
  top: 790px;
  background-color:rgba(255, 255, 255, 0.836);
}

.StudentCouncil > h2{
  display: inline;
  position: relative;
  left: 550px;
  top: 2px;
  font-size: 34px;
  color: blueviolet;
}

.mark_counter{
  display: block;
  position: relative;
  top: 850px;
  background-color:rgba(255, 255, 255, 0.836);
}

.mark_counter > h2
{
  display: inline;
  position: relative;
  left: 645px;
  top: 2px;
  font-size: 34px;
  color: blueviolet;
}


.mark_counter > p
{
display: flex;
align-items: center;
justify-content: center;
}

#count
{
border-radius: 18px;
display: flex;
border: 1px solid blueviolet;
position: relative;
left: 730px;
width: 100px;
height: 50px;
justify-content: center;
align-items: center;
color: blueviolet;
background-color: aliceblue;
font-weight: 900;
transition: 0.8s;
}

#count:hover{
  cursor: pointer;
  color: aliceblue;
  background-color: blueviolet;
  transition: 0.8s;
  border: 1px solid white;
}


.register
{
  display: block;
  position: relative;
  top: 850px;
}

.register > h2{
  display: inline;
  position: relative;
  left: 600px;
  top: 2px;
  font-size: 34px;
  color: blueviolet;
}

form{
  margin-left: 645px;
  margin-bottom: 10px;
}

#email, #send, textarea, select,option{
  box-sizing: border-box;
  display: block;
  width: 250px;
  height: 30px;
  font-family: "Calibri";
  margin-top: 10px;
  color: black;
  border-color: blueviolet;
  border-radius: 13px;
}

textarea{
  width: 250px;
  height: 100px;
  resize: vertical;
}

#send{
  color: blueviolet;
  background-color: aliceblue;
  border-radius: 16px;
  border: 1px solid blueviolet;
  transition: 0.9s;
}

#send:hover{
  color: aliceblue;
  background-color: blueviolet;
  border: 1px solid aliceblue;
  transition: 0.9s;
  cursor: pointer;
}

optgroup{
  color: black;
  text-align: center;
  font-weight: 700;
}

hr{
  opacity: 0;
}

footer{
  display: block;
  position: relative;
  top: 950px;
  width: 100%;
  height: 200px;
  background-color:rgba(152, 14, 216, 0.781);
}

#arm{
  position: relative;
  float: left;
  left: 144px;
  top: 30px;
}


#span2{
  position: relative;
  top: 160px;
  left: 42px;
  color: rgb(247, 247, 247);
}

span{
  position: relative;
  float: left;
  left: 160px;
  top: 45px;
  color: rgb(255, 255, 255);
  font-weight: 800;
}

#ktak{
  position: relative;
  left: 106px;
  top: 81px;
}

#span3{
  position: relative;
  left: 100px;
  top: 88px;
}

@media screen and (max-width: 1280px){
  h3{
    left: 540px;
    display: inline-block;
  }
  .exams_info > a{
    left: 50px;
  }

  iframe{
    left: 415px;
  }
  #courses{
    left: 540px;
  }
  #courses_info{
    left: 20px;
  }
  #olympiad_h2{
    left: 540px;
  }
  #olimp_info{
    left: 50px;
  }
  .exams_info > h2{
    left: 540px;
  }
  table{
    left: 320px;
  }
  #teachers_scroll{
    left: 540px;
  }
  .StudentCouncil > h2{
    left: 430px;
  }
  .mark_counter > h2{
    left: 480px;
  }
  #count{
    left: 575px;
  }
  .register > h2{
    left: 430px;
  }
  #email, #send, textarea, select,option{
    position: relative;
    right: 145px;
  }
}

#menu{
  display: none;
}

@media screen and (max-width: 1024px){
  #Courses,#Olympiads,#Exams,#teachers,#StudentCouncil,#Address{
    display: none;
  }

  #menu{
    display: flex;
    width: 15vh;
    height: 65px;
    border-style: none;
    position: relative;
    top: 0px;
    float: right;
    right: 30px;
    bottom: 60px;
    font-size: 21px;
    align-items: center;
    justify-content: center;
    transition: 0.7s;
    cursor: pointer;
    color: black;
    background: blueviolet;
  }

  #menu:hover{
   background-color: black;
    color: blueviolet;
    transition: 0.8s;
  }

  .dropdown{
    display: none;
  position: relative;
  float: right;
  left: 60px;
  top:70px;
  background-color: #f9f9f9;
  width: 37vh;
  height: 395px;
  overflow: auto;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  border-radius: 18px;
  }
  .show{
    display: block;
    transition: 0.8s;
  }
  
  #Courses1,#Olympiads1,#Exams1,#teachers1,#StudentCouncil1,#Address1{
    display: inline-flex;
    width: 200px;
    background-color: blueviolet;
    position: relative;
    color: black;
    text-decoration: none;
    transition: 0.8s;
    left: 15px;
    top: 10px;
    padding: 15px;
    font-weight: bold;
    justify-content: center;
    align-items: center;
    border-radius: 18px;
    border: 1px solid black;
    cursor: pointer;
    margin-top: 10px;
  }
  #Courses1:hover, #Olympiads1:hover, #Exams1:hover,#teachers1:hover,#StudentCouncil1:hover,#Address1:hover{
    background-color: black;
    color: blueviolet;
}
  
  #courses_info{
    display: inline;
    font-size: 15px;
    right: 60px;
  }

  #courses{
    left: 455px;
  }

  h3{
    left: 440px;
    display: inline-block;
  }
  .exams_info > a{
    left: 10px;
    font-size: 20.5px;
  }

  iframe{
    left: 415px;
    width: 300px;
    height: 200px;
  }
  #courses_info{
    right: 200px;
  }
  #olympiad_h2{
    left: 442px;
  }
  #olimp_info{
    left: 50px;
  }
  .exams_info > h2{
    left: 440px;
  }
  table{
    left: 220px;
  }
  #teachers_scroll{
    left: 440px;
  }
  .StudentCouncil > h2{
    left: 340px;
  }
  .mark_counter > h2{
    left: 410px;
  }

  #count{
    left: 495px;
  }
  .register > h2{
    left: 350px;
  }
  #email, #send, textarea, select,option{
    position: relative;
    right: 220px;
  }
  #ktak{
    right: 100px;
  }
  #span3{
    right: 100px;
  }
  #span2{
    left: 0px;
  }
}

@media screen and (max-width:820px) {
  #courses_info{
    left: 10px;
  }

  #courses{
    left: 315px;
  }

  h3{
    left: 320px;
    display: inline-block;
  }
  .exams_info > a{
    left: 10px;
    font-size: 20.5px;
  }

  iframe{
    left: 295px;
    width: 300px;
    height: 200px;
  }
  #courses_info{
    right: 200px;
  }
  #olympiad_h2{
    left: 310px;
  }
  #olimp_info{
    left: 50px;
    font-size: 29px;
  }
  .exams_info > h2{
    left: 310px;
  }
  .exams_info > a{
    font-size: 18px;
    left: 0px;
  }
  table{
    left: 110px;
  }
  #teachers_scroll{
    left: 350px;
  }
  .StudentCouncil > h2{
    left: 220px;
  }
  .mark_counter > h2{
    left: 310px;
  }

  #count{
    left: 395px;
  }
  .register > h2{
    left: 250px;
  }
  #email, #send, textarea, select,option{
    position: relative;
    right: 320px;
  }
  #span3{
   display: none;
  }
  #span2{
    left: 190px;
  }
}

@media screen and (max-width:412px){
  html {
    overflow-x: hidden;
  }
  .nav > h1{
    font-size: 18px;
  }
  #courses_info{
    display: none;
  }

  .dropdown{
    width: 28vh;
    left: 120px;
    float: left;
  }


  #courses{
    left: 75px;
  }

  h3{
    left: 75px;
    display: inline-block;
  }
  .exams_info > a{
    left: 10px;
    font-size: 20.5px;
  }
  #menu{
    right: 220px;
  }

  iframe{
    left: 47px;
    width: 300px;
    height: 200px;
  }

  #olympiad_h2{
    left: 75px;
  }
  #olimp_info{
    left: 0px;
    font-size: 18px;
    font-weight: bold;
  }


  .exams_info > h2{
    left: 75px;
  }
  .exams_info > a{
    font-size: 11.8px;
    margin-top: 3px;
    top: 0;
    left: 0;
  }
  table{
    left: 10px;
    width: 100px;
    height: 10px;
    font-size: 18px;
  }

  .teachers{
    height: 1315px;
  }

  #teachers_scroll{
    left: 85px;
  }
  .StudentCouncil > h2{
    left: 75px;
  }
  .mark_counter > h2{
    left: 75px;
  }

  #count{
    left: 165px;
    display: inline;
  }
  .register > h2{
    left: 50px;
    font-size: 27px;
  }
  #email, #send, textarea, select,option{
    position: relative;
    right: 560px;
  }
  #arm{
    left: 10px;
  }
  #span3{
   display: none;
  }
  span{
    font-size: 10px;
    left: 10px;
  }
  #span2{
    left: 30px;
    top: 80px;
    font-size: 11px;
  }
}

@media screen and (max-width: 280px) {
  .nav > h1{
  font-size: 16px;
  left: 0px;
  }
  #menu{
    right: 300px;
  }

  h2{
    font-size: 12px;
  }
  table{
    font-size: 12.5px;
  }
  .exams_info{
    height: 450px;
  }
  .exams_info > h2{
    left: 15px;
    font-size: 25.7px;
  }
  .teachers{
    height: 1050px;
  }
  .teachers > h2{
    font-size: 26px;
    left: 5px;
  }
  .StudentCouncil{
    width: 300px;
  }
  .StudentCouncil > h2{
    left: 55px;
    font-size: 26px;
  }
  .mark_counter > h2{
    left: 35px;
    font-size: 26px;
  }

  #count{
    left: 85px;
    display: inline;
  }
  .register > h2{
    left: 50px;
    font-size: 27px;
  }
  #email, #send, textarea, select,option{
    position: relative;
    right: 620px;
  }
  #span2{
    left: 10px;
    top: 80px;
    font-size: 11px;
  }
}

::-webkit-scrollbar {
  width: 10px;

}


::-webkit-scrollbar-track {
  box-shadow: inset 0 0 5px rgb(214, 3, 203);
  border-radius: 10px;
}


::-webkit-scrollbar-thumb {
  background: blueviolet;
  border-radius: 18px;
}

/* thanks.html page */
.wrapper{
  margin: 0 auto;
  max-width: 500px;
  width: 100%;
}

.progress__line {
  background-color: #2fc54d;
  color: #fff;
  left: 0;
  top: 0;
  position: absolute;
  text-align: center;
}

.progress__line-bg{
  background-color: #ccc;
  border-radius: 20px;
  height: 20px;
  overflow: hidden;
  position: relative;
  width: 100%;
}

#thanks{
color: blueviolet;
text-align: center;
}

#thanks_info{
color: blueviolet;
text-align: center;
}