* {
  margin: 0;
  padding: 0;
  line-height: 1.5;
}

body {
  background-image: url(https://kartinkin.net/uploads/posts/2021-07/1626820064_1-kartinkin-com-p-fon-s-perelivami-krasivo-1.jpg);
  background-position: center;
  background-size: cover;
  font-family: sans-serif;
  color: #ffffff;
  min-height: 100vh;
}

body>h1 {
  background: rgb(255, 255, 255);
  background: linear-gradient(90deg, rgba(255, 255, 255, 1) 0%, rgba(0, 17, 38, 1) 25%, rgba(0, 54, 65, 1) 75%, rgba(255, 255, 255, 1) 100%);
  text-align: center;
  height: 20vh;
  line-height: 20vh;
  border-radius: 15px;
  margin: 20px;
  text-shadow: 4px 4px 2px #000;
}

main {
  background-color: rgb(0, 0, 0, 0.8);
  text-align: center;
  min-height: 45vh;
  border-radius: 15px;
  margin: 20px;
  padding: 20px;
}

footer {
  background-color: rgb(0, 0, 0, 0.8);
  text-align: left;
  min-height: 10vh;
  border-radius: 15px;
  margin: 20px;
  padding: 20px 0 20px 10%;
}

footer>h2 {
  font-size: 1.5rem;
  text-decoration: underline;
}

footer>address::before {
  content: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 576 512'%3E%3Cpath width='100' fill='%23fff' d='M528 32H48C21.5 32 0 53.5 0 80v352c0 26.5 21.5 48 48 48h480c26.5 0 48-21.5 48-48V80c0-26.5-21.5-48-48-48zm-352 96c35.3 0 64 28.7 64 64s-28.7 64-64 64-64-28.7-64-64 28.7-64 64-64zm112 236.8c0 10.6-10 19.2-22.4 19.2H86.4C74 384 64 375.4 64 364.8v-19.2c0-31.8 30.1-57.6 67.2-57.6h5c12.3 5.1 25.7 8 39.8 8s27.6-2.9 39.8-8h5c37.1 0 67.2 25.8 67.2 57.6v19.2zM512 312c0 4.4-3.6 8-8 8H360c-4.4 0-8-3.6-8-8v-16c0-4.4 3.6-8 8-8h144c4.4 0 8 3.6 8 8v16zm0-64c0 4.4-3.6 8-8 8H360c-4.4 0-8-3.6-8-8v-16c0-4.4 3.6-8 8-8h144c4.4 0 8 3.6 8 8v16zm0-64c0 4.4-3.6 8-8 8H360c-4.4 0-8-3.6-8-8v-16c0-4.4 3.6-8 8-8h144c4.4 0 8 3.6 8 8v16z'%3E%3C/path%3E%3C/svg%3E");
  display: inline-block;
  font-size: inherit;
  overflow: visible;
  vertical-align: -.125em;
  width: 1.5em;
  margin-right: .75rem;
}

img {
  max-width: 45%;
  border-radius: 15px;
  display: block;
  margin: 10px auto;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0% {
    transform: translateY(0px);
  }

  50% {
    transform: translateY(-20px);
  }

  100% {
    transform: translateY(0px);
  }
}

.btn {
  margin: 0 auto;
  position: relative;
  width: 215px;
  height: 50px;
  margin: 20px auto;
  box-sizing: border-box;
}

.btn a {
  box-sizing: inherit;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.05);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 30px;
  color: #fff;
  z-index: 1;
  font-weight: 400;
  letter-spacing: 1px;
  text-decoration: none;
  overflow: hidden;
  transition: 0.5s;
  backdrop-filter: blur(15px);
}

.btn:hover a, .btn:focus a {
  letter-spacing: 3px;
}

.btn a::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 50%;
  height: 100%;
  background: linear-gradient(to left, rgba(255, 255, 255, 0.15), transparent);
  transform: skew(45deg) translate(0);
}

.btn::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translate(-50%);
  bottom: -5px;
  width: 30px;
  height: 10px;
  background-color: #f00;
  border-radius: 10px;
  transition: 0.5s;
  transition-delay: 0s;
}

.btn:hover::before {
  bottom: 0;
  height: 50%;
  width: 80%;
  border-radius: 30px;
  transition-delay: 0.5s;
}

.btn::after {
  content: '';
  position: absolute;
  left: 50%;
  transform: translate(-50%);
  top: -5px;
  width: 30px;
  height: 10px;
  background-color: #f00;
  border-radius: 10px;
  transition: 0.5s;
  transition-delay: 0s;
}

.btn:hover::after {
  top: 0;
  height: 50%;
  width: 80%;
  border-radius: 30px;
  transition-delay: 0.5s;
}

.btn-red::before,
.btn-red::after {
  background-color: #ff1f71;
  box-shadow: 0 0 5px #ff1f71,
    0 0 15px #ff1f71,
    0 0 30px #ff1f71,
    0 0 60px #ff1f71;
}

.btn-blue::before,
.btn-blue::after {
  background-color: #2bd2ff;
  box-shadow: 0 0 5px #2bd2ff,
    0 0 15px #2bd2ff,
    0 0 30px #2bd2ff,
    0 0 60px #2bd2ff;
}

.btn-green::before,
.btn-green::after {
  background-color: #1eff45;
  box-shadow: 0 0 5px #1eff45,
    0 0 15px #1eff45,
    0 0 30px #1eff45,
    0 0 60px #1eff45;
}

@media only all and (max-width: 550px) {
  body>h1 {
    font-size: 1rem;
  }
}