@import url('https://rsms.me/inter/inter.css');
html { font-family: 'Inter', sans-serif; }
@supports (font-variation-settings: normal) {
  html { font-family: 'Inter var', sans-serif; }
}

:root {
  --page-back: #ffffff;
  --page-fore: #111118;
  --page-font-size: 24px;

  --section-pad: 120px;
  --section-border: #f8f8f8;
  --section-height: 100vh;

  --form-width: 240px;
  --form-back: #111118;
  --form-fore: #ffffff;
  --form-border: #66666a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page-back: #111118;
    --page-fore: #ffffff;

    --section-border: #33333a;

    --form-back: #ffffff;
    --form-fore: #111118;
    --form-border: #dddddd;
  }
}

@media (max-width: 640px) {
  :root {
    --page-font-size: 16px;

    --section-pad: 24px;
    --section-height: 100vw;

    --form-width: 200px;
  }
}

@keyframes fadein {
  0% {
    visibility: hidden;
    opacity: 0;
    transform: translate(0, 24px);
  }
  100% {
    opacity: 1;
    transform: translate(0, 0);
  }
}

body {
  font-family: "Inter var";
  font-size: var(--page-font-size);
  font-variation-settings: "wght" 300;
  line-height: 1.25;
  background-color: var(--page-back);
  color: var(--page-fore);
}

header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 24px;
  z-index: 1;
  color: #ffffff;
  mix-blend-mode: difference;
}

h1 {
  font-variation-settings: "wght" 600;
}

section {
  background: var(--page-back);
  padding: var(--section-pad);
  height: var(--section-height);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--section-border);
}


section img {
  object-fit: contain;
  max-width: 100%;
  max-height: 100%;
}


form {
  position: fixed;
  bottom: 24px;
  right: 24px;
  max-width: var(--form-width);

  background: var(--form-back);
  color: var(--form-fore);
  padding: 24px;

  display: grid;
  grid-gap: 16px 8px;
  grid-template-areas: "label label" "input eth" "button button";
  grid-template-columns: 1fr auto;
  align-items: center;

  display: none;
}

form.has-eth { 
  display: grid;
  animation: fadein 0.4s 0.8s both;
}

form label {
  display: block;
  font-size: 16px;
  grid-area: label;
}

form input {
  grid-area: input;
  width: 100%;
  appearance: none;
  border: none;
  text-align: right;
  padding: 8px;
  font-variation-settings: "wght" 600;
  background: var(--form-back);
  color: var(--form-fore);
  border: 1px solid var(--form-border);
}

form input:focus {
  border: 1px solid var(--form-fore);
  outline: none;
}

form span {
  grid-area: eth;
}

form button {
  grid-area: button;
  appearance: none;
  border: none;
  background: var(--form-fore);
  color: var(--form-back);
  font: inherit;
  padding: 8px;
  font-size: 16px;
}


@supports (scroll-snap-type: y mandatory) {
  @media (min-width: 640px) {
    html {
      scroll-snap-type: y mandatory;
    }
  
    section {
      scroll-snap-align: start;
    }
  }
}