JSFiddle - React, Tailwind, and code Playground

HTML

<section class="top-section">
  <section class="top-section__left input-flasks" id="inputColors">

  </section>
  <section class="top-section__right">

  </section>
</section>

<section class="bottom-section">
  <section class="bottom-section__left">

  </section>
  <section class="bottom-section__right">

  </section>
</section>

CSS

:root {
  --light: hsl(36, 14%, 93%);
  --dark: indigo;
  --gold: hsl(46, 86%, 58%);
}

/*
===================================
Global styles
===================================
*/

body {
  font-family: 'Lora', serif;
  background-color: var(--dark);
  color: var(--light);
  padding: 0 8.75rem;
  max-width: 107.5rem;
  margin: 0 auto;
  font-size: 1.25rem;
}

body *::selection {
  background-color: hsla(46, 86%, 58%, 0.8);
  color: var(--dark);
}

h1 {
  padding-bottom: 1rem;
}

h2 {
  font-family: 'Cinzel Decorative', serif;
  font-size: 1.25rem;
}

button {
  border: none;
  background: none;
  color: var(--light);
  cursor: pointer;
}

a {
  color: var(--light);
}

a:hover {
  color: var(--gold);
  transition: 0.3s;
}

button {
  text-decoration: underline;
}

button:hover {
  color: var(--gold);
  transition: 0.3s;
}

.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip .tooltiptext {
  visibility: hidden;
  width: 140px;
  background-color: var(--light);
  color: var(--dark);
  text-align: center;
  padding: 5px 1rem;
  position: absolute;
  z-index: 1;
  bottom: 160%;
  left: 50%;
  margin-left: -60px;
  opacity: 0;
  transition: opacity 0.3s;
}

.tooltip:hover .tooltiptext {
  visibility: visible;
  opacity: 1;
}

/*
===================================
Main
===================================
*/

.instructions {
  text-align: center;
  margin-bottom: 2.5rem;
}

/*
-----------------------------------
Colors
-----------------------------------
*/

.colors-block {
  width: 4rem;
  height: 4rem;
  border: solid 2px var(--light);
  border-radius: 50%;
}

.colors-block:hover {
  cursor: pointer;
}

/* 
-----------------------------------
Top section
-----------------------------------
*/

.top-section {
  padding: 0 2.7rem;
  padding-bottom: 2.5rem;
  border-bottom: solid 2px var(--light);
  margin-bottom: 2.5rem;
  margin-top: 5rem;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 8rem;
}

.flask {
 ...