:root {
  color-scheme: light dark;
  --bg: light-dark(hsl(0 0 100%), hsl(0 0% 0%));
  --fg: light-dark(hsl(0 0% 0%), hsl(0 0 100%));
  --input-bg: light-dark(white, hsl(0, 0%, 18%));
  --gray-med: light-dark(hsl(0 0% 86%), hsl(0, 0%, 38%));
  --accent: #e30002;
  --alt: light-dark(hsl(0 0 0 / 0.1), hsl(0 0 100% / 0.2));
  --padding: min(2svi, 1rem);
  --valid: light-dark(hsl(125 94% 21%), hsl(125, 74%, 39%));
  --invalid: var(--accent);
  font-size: 16px;
}

input::-webkit-datetime-edit-day-field:focus,
input::-webkit-datetime-edit-month-field:focus,
input::-webkit-datetime-edit-year-field:focus,
::selection {
  background-color: var(--alt);
  color: black;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-weight: normal;
  user-select: none;
  accent-color: var(--fg);
  transition: all 200ms ease-out;
}

*:is(:focus-visible),
input[type="date"]:has(:focus-visible),
input::-webkit-calendar-picker-indicator:focus-visible {
  outline: 2px solid var(--fg);
  outline-offset: 2px;
}

input::-webkit-calendar-picker-indicator {
  border-radius: 1px;
}

body {
  margin: 0;
  width: 100svw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
}

#highlighter {
  display: none;
}

main {
  width: min(22rem, 100%);
  display: grid;
  grid-template-columns: auto 1fr;
  row-gap: calc(var(--padding) * 1.5);
  padding: calc(var(--padding) * 2);
  background: var(--bg);
  border-radius: var(--padding);
  border: 1px solid var(--gray-med);

  form {
    display: grid;
    grid-template-columns: subgrid;
    grid-column: span 2;
    row-gap: var(--padding);
    align-items: center;
  }

  h1 {
    font-size: 1.5rem;
    font-weight: bold;
    letter-spacing: 0.02em;
  }

  .input-wrapper {
    display: grid;
    grid-template-columns: 1fr 0;
    align-items: center;

    &:has(:user-invalid, :user-valid) {
      grid-template-columns: 1fr auto;
    }

    .validity {
      overflow: clip;
      opacity: 0;
      position: relative;

      & > span {
        opacity: 0;
        height: 100%;
        position: absolute;
        inset: 0;
        display: flex;
        align-items: center;
        justify-content: end;
      }

      .valid {
        color: var(--valid);
        font-size: 1.1rem;
      }

      .invalid {
        color: var(--invalid);
        font-size: 1.5rem;
      }
    }

    &:has(:user-valid) .valid,
    &:has(:user-invalid) .invalid {
      opacity: 1;
    }

    input:is(:user-invalid, :user-valid) + .validity {
      opacity: 1;
      height: 100%;
      aspect-ratio: 2/3;
    }
  }

  h1,
  input[type="submit"] {
    grid-column: span 2;
  }

  label {
    font-size: 0.875rem;
    padding-right: var(--padding);
    white-space: nowrap;
  }

  input {
    font-family: inherit;
    font-size: 0.875rem;
    padding: calc(var(--padding) * 0.5) var(--padding)
      calc(var(--padding) * 0.67);
    border-radius: calc(var(--padding) * 0.25);
    border: 1px solid var(--gray-med);
  }

  input[type="text"],
  input[type="email"],
  input[type="date"] {
    background: var(--input-bg);
  }

  input[type="submit"] {
    background: var(--gray-med);
    color: var(--fg);
    font-weight: bold;
    border: none;
    margin-top: var(--padding);
    opacity: 0.5;
  }

  &:has(#email:user-valid):has(#fullName:user-valid):has(#birthDate:user-valid)
    input[type="submit"] {
    background: var(--accent);
    color: var(--alt);
    opacity: 1;
  }
}
:user-(in)valid From
