@font-face {
  font-family: "Inter";
  src: url("fonts/Inter/static/Inter_18pt-Regular.ttf") format("truetype");
  font-weight: 400;
}

@font-face {
  font-family: "Inter";
  src: url("fonts/Inter/static/Inter_18pt-Bold.ttf") format("truetype");
  font-weight: 700;
}

@font-face {
  font-family: "Source Serif 4";
  src: url("fonts/Source_Serif_4/static/SourceSerif4-Regular.ttf")
    format("truetype");
  font-weight: 400;
}

@font-face {
  font-family: "Source Serif 4";
  src: url("fonts/Source_Serif_4/static/SourceSerif4-Bold.ttf")
    format("truetype");
  font-weight: 700;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --bg: #212a37;
  --clr: #fffff5;
}

html,
body {
  margin: 0;
  padding: 0;
  overflow: hidden;
}

body {
  font-family: "Source Serif 4", sans-serif;
  background-color: var(--bg);
}

.container {
  width: 100%;
  height: 100vh;
  position: relative;
}

main {
  width: 100%;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0; /* Start invisible */
  z-index: 1; /* Set a higher z-index after blocks move */
  transition: opacity 1s ease; /* Smooth fade-in */
}

label {
  color: var(--clr);
  font-size: 1.4rem;
  font-weight: 600;
  max-width: 22rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 1rem auto;
  gap: 0.5rem;
}

input {
  padding: 0;
  width: 4rem;
  height: 4rem;
}

div.variables-block {
  width: 100%;
  display: flex;
  justify-content: center;
  margin-top: 2rem;
}

.variables-block {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
}

.shade-container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.color-shade {
  width: 6rem;
  height: 6rem;
  background: rgb(var(--r), var(--g), var(--b));
  margin-bottom: 0.5rem;
  cursor: pointer;
}

.hex-label {
  font-size: 1.4rem;
  color: var(--clr);
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
  transition: transform 0.3s ease; /* Smooth scaling transition */
}

.hex-label:hover {
  transform: scale(1.2);
}

.blocks {
  width: 100%;
  height: 100vh;
  color: var(--bg);
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2; /* Initially higher to cover main */
}

.block {
  position: fixed;
  width: 50%;
  height: 100vh;
  background: var(--clr);
}

.letter {
  position: absolute;
  z-index: 3; /* Highest z-index for letters */
  font-size: 7em;
  color: var(--clr);
  mix-blend-mode: difference;
}

.block-left {
  left: 0;
}

.block-right {
  right: 0;
}

.row {
  width: 100%;
  height: 50vh;
}

.top-left,
.top-right,
.bottom-right {
  position: absolute;
  z-index: 10000;
}

.top-left {
  top: 32%;
  left: 33%;
}

.top-right {
  top: 32%;
  right: 42%;
}

.bottom-right {
  bottom: 25%;
  right: 42%;
}

@media (max-width: 900px) {
  body {
    margin: auto 0.5rem;
  }

  .letter {
    font-size: 5rem;
  }
}

@media (max-width: 590px) {
  body {
    margin: 0 0.5rem;
    overflow-y: auto;
  }

  .container {
    scroll-snap-type: y mandatory;
    height: 100vh; /* Limit to viewport height */
  }

  .letter {
    font-size: 3rem;
  }
  .color-shade {
    width: 4rem;
    height: 4rem;
  }
  label,
  .hex-label {
    font-size: 1rem;
  }

  label {
    margin: 1rem auto;
  }

  .top-left {
    top: 32%;
    left: 23%;
  }

  .top-right {
    top: 32%;
    right: 34%;
  }

  .bottom-right {
    bottom: 47%;
    right: 42%;
  }
}