html, body {
  margin: 0;
  overflow: hidden;
  color: #fff;
  background-color: #222222;
  background-attachment: fixed;
  background-size: cover;
  background-image: url("../img/gradient.webp"); }

a[href] {
  color: transparent; }

.center {
  display: flex;
  overflow: hidden;
  justify-content: center;
  align-items: center;
  min-height: 100vh; }

.box {
  background-color: #0b0b0b80;
  aspect-ratio: 1 / 1;
  padding: 20px;
  border-radius: 15%;
  border: 3px solid #fff;
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.75);
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.box-404 {
  background-color: #0b0b0b80;
  aspect-ratio: 1 / 1;
  padding: 20px;
  border-radius: 15%;
  border: 3px solid #fff;
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.75);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center; }

.logo {
  width: 65%;
  align-self: center; }

.header {
  font-size: 4vh;
  margin-top: auto; }

.header-404 {
  font-size: 6vh; }

.unselectable {
  -webkit-user-select: none;
  user-select: none; }

@media (max-width: 768px) {
  .box {
    width: 70%;
  }
  .box-404 {
    width: 40%;
  }
}
@media (min-width: 768px) {
  .box {
    width: 15%;
  }
  .box-404 {
    width: 10%;
  }
}

@keyframes fadeIn {
  0% {
    opacity: 0; }
  100% {
    opacity: 1; } }

.box {
  animation: fadeIn 2s;
  animation-fill-mode: forwards; }

.logo, .header {
  opacity: 0;
  animation: fadeIn 1.2s;
  animation-fill-mode: forwards; }

.logo {
  animation-delay: 1s; }

.header {
  animation-delay: 1.35s; }

@keyframes snowfall {
  0% {
    transform: translateY(-10vh); }
  100% {
    transform: translateY(130vh); } }

.snowflake {
  background: white;
  border-radius: 50%;
  position: fixed;
  top: -5vh;
  animation: snowfall infinite;
  opacity: 0.1; }

@font-face {
  font-family: 'SF-Regular';
  src: url("../fonts/SF-Pro-Display-Regular.woff2") format("woff2");
  font-weight: normal;
  font-style: normal;
  font-display: swap; }

h1, h2, h3, h4, h5, h6, summary, select, button, p {
  font-family: 'SF-Regular', system-ui; }