@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700;800&family=Do+Hyeon&family=Nanum+Myeongjo:wght@400;700;800&family=Noto+Sans+KR:wght@100;300;400;500;700;900&display=swap");

html {
  scroll-behavior: smooth;
  font-family: "Noto Serif KR";
}
* {
  font-family: "Noto Sans KR";
}
.container {
  max-width: 1024px!important;
}




.container_out {
  scroll-snap-type: y mandatory;
    overflow-y: scroll;
    height: 100vh
}

section {
    height: 100vh;
}



/* start of sticky */

section#main {
  height: 100vh;
  background-image: url(/images/bg1.jpg);
}
section#icons {
    overflow-y: scroll;
  background-image: url(/images/bg4.jpg);
  background-attachment: scroll;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}


div#navbar{
  position: fixed;
  top: -50px;
  display: block;
  transition: top -0.3x;
}

h1.pt {
  background-image: url(/images/title-line.png);
  background-repeat: no-repeat;
  background-position: center;
  background-opacity: 0.5;
  color: #bef264;
  text-shadow: 1px 1px 1px gray;
}

#main-nav2 {
  background-color: #777;
}

#main-nav{
  oveflow: hidden;  
}

#main-nav.sticky {
  position: fixed;
  top: 0;
  background-color:#0e5ea3;
}

#main-nav.sticky #main-pic {
  margin-top: 0px;
}

#main-nav.sticky li#link_home {
  display: none;
}

#main-nav.sticky li#link_logo {
  display: block;
}

.navbarOffsetMargin {
  padding-top: 0px;
}

/* end of sticky */


.dropDown {
  position: relative;
}

.dropDown:hover .dropDownMenu {
  display: inline-block;
  position: absolute;
  width: 170px;
  left: 0;
}

.dropDownMenu {
  display: none;
}
/*
.sticky {
  position: fixed;
  top: 0;
  padding: 0.5rem 0;
}*/

.before-line {
  content: "";
  display: block;
  width: 10px;
  height: 2px;
  background: #191970;
  left: 0;
  top: 50%;
  position: absolute;
}

/* 맨 위로가기 시작 */
div.nav_top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  margin: 0;
  padding: 0;
  font-size: 2rem;
  color: #333;
  line-height: 1.6em;
  font-family: "Poppins", "Noto Sans KR", sans-serif;
  font-weight: 400;
  letter-spacing: -0.02em;
}

[class~="nav_top"] a {
  text-decoration: none;
  display: block;
  width: 52px;
  height: 52px;
  border-radius: 52px;
  background-color: #fff;
  border: 1px solid #eee;
  box-shadow: border-box;
}

[class~="nav_top"] a:hover {
  background-color: #eee;
}

[class~="nav_top"] a:before {
  text-decoration: none;
  margin-top: 0.6rem;
  display: block;
  width: 3.2rem;
  height: 3.2rem;
  line-height: 50px;
  text-align: center;
  color: #000;
  content: "\f062";
  font: var(--fa-font-solid);
  /* font-family: "FontAwesome"; */
}
/* 맨 위로가기 끝 */

.main-banner {
  background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
  animation: gradient 8s ease infinite;
  background-size: 400% 400%;
}
.main-banner2 {
  background: linear-gradient(-45deg, #23d5ab, #23a6d5, #e73c7e, #ee7752);
  animation: gradient 8s ease infinite;
  background-size: 400% 400%;
}

@keyframes gradient {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

header {
  background-image: linear-gradient(
    to bottom,
    rgb(13, 104, 160),
    rgb(15, 52, 177)
  );
}
/* 
.circles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.circles li {
  position: absolute;
  display: block;
  list-style: none;
  width: 20px;
  height: 20px;
  background: rgba(0, 123, 255, 0.1);
  animation: animate 25s linear infinite;
  bottom: -150px;
}

.circles li:nth-child(1) {
  left: 25%;
  width: 80px;
  height: 80px;
  animation-delay: 0s;
}

.circles li:nth-child(2) {
  left: 10%;
  width: 20px;
  height: 20px;
  animation-delay: 2s;
  animation-duration: 12s;
}

.circles li:nth-child(3) {
  left: 70%;
  width: 20px;
  height: 20px;
  animation-delay: 4s;
}

.circles li:nth-child(4) {
  left: 40%;
  width: 60px;
  height: 60px;
  animation-delay: 0s;
  animation-duration: 18s;
}

.circles li:nth-child(5) {
  left: 65%;
  width: 20px;
  height: 20px;
  animation-delay: 0s;
}

.circles li:nth-child(6) {
  left: 75%;
  width: 110px;
  height: 110px;
  animation-delay: 3s;
}

.circles li:nth-child(7) {
  left: 35%;
  width: 150px;
  height: 150px;
  animation-delay: 7s;
}

.circles li:nth-child(8) {
  left: 50%;
  width: 25px;
  height: 25px;
  animation-delay: 15s;
  animation-duration: 45s;
}

.circles li:nth-child(9) {
  left: 20%;
  width: 15px;
  height: 15px;
  animation-delay: 2s;
  animation-duration: 35s;
}

.circles li:nth-child(10) {
  left: 85%;
  width: 150px;
  height: 150px;
  animation-delay: 0s;
  animation-duration: 15s;
} */
img.tri {
  left: 10%;
  width: 150px;
  height: 150px;
  animation: animate 25s linear infinite;
  animation-delay: 0s;
  animation-duration: 10s;
}
img.tri2 {
  left: 300px;
  width: 200px;
  height: 200px;
  animation: animate 25s linear infinite;
  animation-delay: 2s;
  animation-duration: 10s;
}
img.tri3 {
  left: 300px;
  width: 120px;
  height: 120px;
  animation: animate 25s linear infinite;
  animation-delay: 4s;
  animation-duration: 10s;
}
@keyframes animate {
  0% {
    transform: translateY(0) rotate(0deg);
    opacity: 1;
    border-radius: 0;
  }

  100% {
    transform: translateY(-1500px) rotate(720deg);
    opacity: 0;
    border-radius: 50%;
  }
}