a {
  text-decoration: none;
}

a h1 {
  text-align: center;
}

.content {
  width: 100%;
  height: auto;
  background-color: #fff;
  position: absolute;
  z-index: 1;
}

.input {
  width: 95%;
  outline: 0;
  word-wrap: break-word;
  overflow-x: hidden;
  overflow-y: auto;
  border-color: rgba(82, 168, 236, 0.8);
  margin: 0 auto;
}

.input:focus,
.input:valid {
  outline: none;
  --angle: 0deg;
  border-image: conic-gradient(from var(--angle), red, yellow, lime, aqua, blue, magenta, red) 1;
  animation: 3s rotate9234 linear infinite;
}

@keyframes rotate9234 {
  to {
    --angle: 360deg;
  }
}

@property --angle {
  syntax: "<angle>";
  initial-value: 0deg;
  inherits: false;
}

.btns {
  width: 100vw;
  height: auto;
}

.btn-donate {
  --clr-font-main: hsla(0 0% 20% / 100);
  --btn-bg-1: hsla(194 100% 69% / 1);
  --btn-bg-2: hsla(217 100% 56% / 1);
  --btn-bg-color: hsla(360 100% 100% / 1);
  cursor: pointer;
  font-family: "Segoe UI", system-ui, sans-serif;
  font-weight: 500;
  -webkit-transition: 0.8s;
  transition: 0.8s;
  background-size: 280% auto;
  background-image: linear-gradient(325deg, var(--btn-bg-2) 0%, var(--btn-bg-1) 55%, var(--btn-bg-2) 90%);
  border: none;
  border-radius: var(--radii);
  color: var(--btn-bg-color);
  -webkit-box-shadow: 0px 0px 20px rgba(71, 184, 255, 0.5), 0px 5px 5px -1px rgba(58, 125, 233, 0.25),
    inset 4px 4px 8px rgba(175, 230, 255, 0.5), inset -4px -4px 8px rgba(19, 95, 216, 0.35);
  box-shadow: 0px 0px 20px rgba(71, 184, 255, 0.5), 0px 5px 5px -1px rgba(58, 125, 233, 0.25),
    inset 4px 4px 8px rgba(175, 230, 255, 0.5), inset -4px -4px 8px rgba(19, 95, 216, 0.35);
}

.btn-donate:hover {
  background-position: right top;
}

.btn-donate:is(:focus, :focus-within, :active) {
  outline: none;
  -webkit-box-shadow: 0 0 0 3px var(--btn-bg-color), 0 0 0 6px var(--btn-bg-2);
  box-shadow: 0 0 0 3px var(--btn-bg-color), 0 0 0 6px var(--btn-bg-2);
}

@media (prefers-reduced-motion: reduce) {
  .btn-donate {
    -webkit-transition: linear;
    transition: linear;
  }
}

.footer {
  float: left;
  position: absolute;
  bottom: 0;
  width: 100%;
  text-align: center;
  background-color: #2f2f2f;
  color: #fff;
}

@media (max-width: 768px) {
  html {
    font-size: calc(100 * 100vw / 720);
  }

  a h1 {
    font-size: 0.3rem;
  }

  .content {
    top: 1rem;
  }

  .input {
    border: 0.05rem solid #a0b3d6;
    font-size: 0.4rem;
    line-height: 0.5rem;
    padding: 0.05rem;
    box-shadow: inset 0 0.01rem 0.03rem rgba(0, 0, 0, 0.1), 0 0 0.08rem rgba(82, 168, 236, 0.6);
  }

  .input:focus,
  .input:valid {
    border-bottom: 0.05rem solid;
  }

  .btns {
    margin-top: 0.1rem;
    display: flex;
    justify-content: space-evenly;
  }

  .btn-donate {
    --radii: 0.5em;
    padding: 0.9em 1.4em;
    min-width: .001rem;
    min-height: .001rem;
    font-size: var(--size, 0.2rem);
  }

  p {
    margin-left: 0.3rem;
    font-size: 0.5rem;
  }

  .footer {
    padding: 0.04rem;
    font-size: 0.2em;
  }
}

@media (min-width: 768px) {
  .content {
    top: 80px;
  }

  .input {
    width: 95%;
    height: 40vh;
    margin-right: auto; 
    padding: 3px; 
    border: 4px solid #a0b3d6; 
    font-size: 26px;
  }

  .input:focus,
  .input:valid {
    border-bottom: 4px solid;
  }

  .btns {
    margin-top: 10px;
    margin-left: 5px;
  }

  .btn-donate {
    --radii: 5px;
    padding: 0.9em 1.4em;
    min-width: 120px;
    min-height: 44px;
    font-size: var(--size, 20px);
    margin-left: 20px;
  }

  p {
    margin-left: 30px;
    font-size: 50px;
  }

  .footer {
    padding: 4px;
    font-size: 20px;
  }
}