/* #project_header, #project_footer{display: none;} */
body, html {
  width: 100%;
  height: 100%;
}

.instructor_section {
  position: relative;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

@media screen and (min-width: 600px) {
  .instructor_section {
    background-image: url(/asset/img/instructor/instructor_background01.jpg);
  }
}

@media screen and (max-width: 600px) {
  .instructor_section {
    background-image: url(/asset/img/instructor/m_instructor_background01.jpg);
  }
}

.instructor_section .textbox {
  position: absolute;
  width: 95%;
  left: 50%;
  top: 55%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  text-align: center;
  color: #FFF;
}

@media screen and (max-width: 600px) {
  .instructor_section .textbox {
    top: 60%;
  }
}

.instructor_section .textbox strong, .instructor_section .textbox p {
  display: block;
  font-size: 35px;
  line-height: 150%;
}

@media screen and (max-width: 1100px) {
  .instructor_section .textbox strong, .instructor_section .textbox p {
    font-size: 25px;
  }
}

@media screen and (max-width: 600px) {
  .instructor_section .textbox strong, .instructor_section .textbox p {
    font-size: 20px;
  }
}

@media screen and (max-width: 350px) {
  .instructor_section .textbox strong, .instructor_section .textbox p {
    font-size: 16px;
  }
}

.instructor_section .textbox strong {
  opacity: 0;
  -webkit-transform: translateY(70px);
          transform: translateY(70px);
  -webkit-transition: opacity 1s, -webkit-transform 1s;
  transition: opacity 1s, -webkit-transform 1s;
  transition: opacity 1s, transform 1s;
  transition: opacity 1s, transform 1s, -webkit-transform 1s;
}

.instructor_section .textbox h3 {
  font-size: 40px;
  margin: 30px 0;
  opacity: 0;
  -webkit-transform: translateY(70px);
          transform: translateY(70px);
  -webkit-transition: opacity 1s, -webkit-transform 1s;
  transition: opacity 1s, -webkit-transform 1s;
  transition: opacity 1s, transform 1s;
  transition: opacity 1s, transform 1s, -webkit-transform 1s;
  -webkit-transition-delay: 0.3s;
          transition-delay: 0.3s;
}

@media screen and (max-width: 1100px) {
  .instructor_section .textbox h3 {
    font-size: 30px;
  }
}

@media screen and (max-width: 600px) {
  .instructor_section .textbox h3 {
    font-size: 27px;
    margin: 25px 0;
  }
}

@media screen and (max-width: 350px) {
  .instructor_section .textbox h3 {
    font-size: 25px;
  }
}

.instructor_section .textbox p {
  opacity: 0;
  -webkit-transform: translateY(70px);
          transform: translateY(70px);
  -webkit-transition: opacity 1s, -webkit-transform 1s;
  transition: opacity 1s, -webkit-transform 1s;
  transition: opacity 1s, transform 1s;
  transition: opacity 1s, transform 1s, -webkit-transform 1s;
  -webkit-transition-delay: 0.6s;
          transition-delay: 0.6s;
}

.instructor_section .textbox .apply_btn {
  width: 185px;
  margin: 45px 0;
  opacity: 0;
  -webkit-transform: translateY(70px);
          transform: translateY(70px);
  -webkit-transition: opacity 1s, -webkit-transform 1s;
  transition: opacity 1s, -webkit-transform 1s;
  transition: opacity 1s, transform 1s;
  transition: opacity 1s, transform 1s, -webkit-transform 1s;
  -webkit-transition-delay: 0.9s;
          transition-delay: 0.9s;
}

@media screen and (max-width: 600px) {
  .instructor_section .textbox .apply_btn {
    margin: 25px 0;
  }
}

.instructor_section .textbox b {
  display: block;
  line-height: 150%;
  font-size: 25px;
  font-family: 'Nanum Myeongjo', serif;
  color: rgba(255, 255, 255, 0.7);
  opacity: 0;
  -webkit-transform: translateY(70px);
          transform: translateY(70px);
  -webkit-transition: opacity 1s, -webkit-transform 1s;
  transition: opacity 1s, -webkit-transform 1s;
  transition: opacity 1s, transform 1s;
  transition: opacity 1s, transform 1s, -webkit-transform 1s;
  -webkit-transition-delay: 1.2s;
          transition-delay: 1.2s;
}

@media screen and (max-width: 1100px) {
  .instructor_section .textbox b {
    font-size: 20px;
  }
}

@media screen and (max-width: 600px) {
  .instructor_section .textbox b {
    font-size: 18px;
  }
}

@media screen and (max-width: 350px) {
  .instructor_section .textbox b {
    font-size: 16px;
  }
}

.instructor_section.active .textbox strong {
  opacity: 1;
  -webkit-transform: translateY(0);
          transform: translateY(0);
}

.instructor_section.active .textbox h3 {
  opacity: 1;
  -webkit-transform: translateY(0);
          transform: translateY(0);
}

.instructor_section.active .textbox p {
  opacity: 1;
  -webkit-transform: translateY(0);
          transform: translateY(0);
}

.instructor_section.active .textbox .apply_btn {
  opacity: 1;
  -webkit-transform: translateY(0);
          transform: translateY(0);
}

.instructor_section.active .textbox b {
  opacity: 1;
  -webkit-transform: translateY(0);
          transform: translateY(0);
}