@font-face {
  font-family: Roos;
  src: url("../font/Roos.woff");
  font-weight: 100 900;
  font-display: swap;
}

* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}

:root {
  --primary: #000;
  --secondary: #c9a051;
}

html {
  font-size: 10px;
}

body {
  font-family: "Roos";
  font-weight: 400;
  background: var(--primary);
  color: var(--secondary);
}

/* img */

img {
  width: 100%;
  height: auto;
  display: block;
}

/* text */

h1 {
  width: 100%;
  font-size: clamp(3.2rem, 0.24608rem + 2.8846vw, 4.4rem);
  text-align: center;
  margin-bottom: 50px;
}

h3 {
  font-size: clamp(2rem, 1.01536rem + 0.9615vw, 2.4rem);
  text-transform: uppercase;
  margin-bottom: 25px;
}

p {
  font-size: clamp(2rem, 1.01536rem + 0.9615vw, 2.4rem);
}

a {
  width: fit-content;
  display: inline-block;
  font-size: clamp(2rem, 1.01536rem + 0.9615vw, 2.4rem);
  color: var(--secondary);
  text-decoration: none;
}

.btn {
  text-transform: uppercase;
  font-size: clamp(1.6rem, 0.61536rem + 0.9615vw, 2rem);
  padding: 14px 25px;
  border: 1px solid var(--secondary);
  border-radius: 30px;
  background: none;
  color: var(--secondary);
  transition: all 0.3s ease-out;
}

.btn:hover {
  background: var(--secondary);
  color: var(--primary);
}

.justify {
  text-align: justify;
}

/* flex */

.flex {
  display: flex;
}

.column {
  flex-direction: column;
}

.space-between {
  justify-content: space-between;
}

.justify-center {
  justify-content: center;
}

.align-center {
  align-items: center;
}

.gap-25 {
  gap: 25px;
}

.gap-50 {
  gap: 50px;
}

/* position */

.relative {
  position: relative;
}

.position-middle {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* header */

header {
  z-index: 10;
  position: fixed;
  width: 100%;
  padding: 40px 60px;
  background: var(--primary);
}

header img {
  width: 150px;
}

/* section */

section {
  width: 100%;
  margin-bottom: 100px;
}

.presentation {
  min-height: 100dvh;
}

.wrap {
  padding-inline: 100px;
}

.title {
  width: calc(100% - 2 * 100px);
}

.title p {
  text-align: center;
}

/* separation */

.separation {
  width: 100%;
}

.separation img,
footer img {
  width: 40px;
}

.separation::before {
  content: "";
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 100%;
  height: 1px;
  background: var(--secondary);
  z-index: -1;
}

/* footer */

footer {
  margin-bottom: 40px;
}

.underline::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--secondary);
  transition: all 0.2s ease-out;
}

.underline:hover::after {
  left: 50%;
  width: 0;
}

/* responsive */

@media screen and (max-width: 1024px) {
  h1 {
    font-size: clamp(2.4rem, 1.93776rem + 1.2327vw, 3.2rem);
  }

  h3,
  a,
  p {
    font-size: clamp(1.6rem, 1.3688rem + 0.6163vw, 2rem);
  }

  h3 {
    margin-bottom: 15px;
  }

  .btn {
    font-size: clamp(1.2rem, 0.9688rem + 0.6163vw, 1.6rem);
    padding: 10px 15px;
  }

  .title {
    width: calc(100% - 2 * 40px);
  }

  header {
    padding: 20px;
  }

  header img {
    width: 100px;
  }

  section {
    margin-bottom: 50px;
  }

  .gap-50 {
    gap: 25px;
  }

  .gap-25 {
    gap: 15px;
  }

  .flex:not(header):not(footer) {
    flex-direction: column;
  }

  .separation img,
  footer img {
    width: 30px;
  }

  footer.flex {
    flex-direction: column-reverse;
    justify-content: start;
  }

  footer a {
    display: inline-flex;
  }

  .citation {
    margin-top: 25px;
  }

  .wrap {
    padding-inline: 40px;
  }

  .align-center:not(header):not(.separation) {
    align-items: start;
  }

  footer img {
    display: none;
  }

  footer,
  footer .gap-25 {
    gap: 5px;
  }
}

/* vpc */

.vpc {
  position: relative;
  top: 50px;
  opacity: 0;
  transition: 0.6s ease-out;
}

.absolute {
  position: absolute;
}

.visible {
  top: 0;
  opacity: 1;
}