@import url("https://fonts.googleapis.com/css2?family=Zen+Antique&display=swap");

:root {
  --box-shadow: 0 8px 22px rgba(0, 0, 0, 0.2);
}

* {
  transition: all 0.4s ease;
}

body {
  font-family: "Zen Antique", serif;
  color: #000000;
	background-color: #ffffff;
}

html {
  font-size: 62.5%;
}

h2,
h3 {
  position: relative;
  z-index: 1;
  font-size: 3rem;
  font-weight: 540;
}

h4 {
  position: relative;
  z-index: 1;
  font-size: 2rem;
  font-weight: 540;
}

p {
  font-weight: 500;
  font-size: 1.7rem;
  line-height: 3rem;
  letter-spacing: 0.2rem;
}

a,
span {
  position: relative;
  z-index: 1;
}


h3.box {
  color:#ffffff;
}

h3.box.changed {
  color:#000000;
}



section {
  padding-top: 60px;
  padding-bottom: 0px;
}

header {
  position: fixed;
  z-index: 1000;
  padding: 2.7rem 5.4rem;
  text-shadow: black 1px 3px 6px;
}

.logo-title {
  cursor: pointer;
}

header img {
  width: 3.5rem;
}

/* ----- book-javascript ----- */
header .book-close-btn {
  display: block;
}

header .book-close-btn.active {
  display: none;
}

header .book-open-btn {
  display: none;
}

header .book-open-btn.active {
  display: block;
}
/* ----- book-javascript ----- */


header a:link {
  color: #ffffff;
  text-decoration: none;
}

header a:visited {
  color: #ffffff;
  text-decoration: none;
}

header a:hover {
  color: rgb(71, 173, 187);
  text-decoration: none;
}

header .menu-bar {
  position: absolute;
  top: 15vh;
  right: -40px;
  /* right: -20px; */
  background: #000;
  width: 240px;
  height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 2rem;
  box-shadow: var(--box-shadow);
  opacity: 0;
}

header .menu-bar.active {
  right: -20px;
  opacity: 1;
}

header .menu-bar li {
  margin-bottom: 3rem;
}
header .menu-bar li a {
  text-decoration: none;
  color: #fff;
  font-size: 2rem;
}

header .menu-bar li a:hover {
  color: rgb(71, 173, 187);
}



a.anchor {
    display: block;
    padding-top: 100px;
    margin-top: -100px;
}



/* sec section */
.sec {
  background-position: center;
  background-size: cover;
  background-attachment: fixed;

}

.sec::after {
  position: absolute;
  content: "";
  background-color: rgba(f, f, f, 0.1);
  width: 100%;
  height:100%;
  top: 0;
  left: 0;
}


.sec .message-left {
  transform: translateY(60px);
  position: relative;
  z-index: 3;
}


.sec .message-right {
  transform: translateY(60px);
  position: relative;
  z-index: 3;
}



@media (max-width: 1000px) {
  .sec h2 {
    font-size: 5rem;
  }

  .sec h3 {
    width: 400px;
    font-size: 3rem;
  }
}

@media (max-width: 768px) {
  .sec .title {
    transform: translateY(-50px);
    text-align: center;
  }

  .sec h2 {
    font-size: 6rem;
  }

  .sec h3 {
    width: 100%;
    text-align: center;
  }

}

@media (max-width: 576px) {
  html {
    font-size: 45%;
  }

  .sec h3 {
    font-size: 2rem;
  }

}