index.css

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', sans-serif;
}

body {
  max-width: 550px;
  margin: auto;
}

header {
  height: 12vh;
}

.color-select {
  display: flex;
  justify-content: space-between;
  padding: 1em 0.5em;
  height: 100%;
}

input[type='color'] {
  display: flex;
  background: none;
  width: 10%;
  height: 100%;
  border: 1px solid #d1d5db;
}

.mode-names {
  width: 40%;
  border: 1px solid #d1d5db;
  padding: 0.5em;
  border-radius: 6px;
}

option[selected] {
  font-weight: 600;
}

.color-btn {
  width: 40%;
  font-weight: 500;
  border: 1px solid #d1d5db;
  background-color: white;
  padding: 0.5em 1em;
  border-radius: 6px;
  cursor: pointer;
}

main {
  height: calc(100vh - 12vh);
}

.color-palette-container {
  display: flex;
  width: 100%;
  height: 100%;
}

.color-palette-column {
  display: flex;
  flex-direction: column;
  text-align: center;
  width: 20%;
}

.color-palette {
  height: 100%;
}

.color-palette-value {
  background: linear-gradient(to bottom, #ece9e6, #ffffff);
  padding: 0.6em;
  font-weight: 500;
}

.color-palette-value > span {
  transition: all 0.1s;
}

.color-palette-value:hover {
  background: linear-gradient(to bottom, #757f9a, #d7dde8);
  color: white;
  cursor: pointer;
}

.copy-text,
.copy-text:hover {
  background: black;
  color: white;
}

@media (max-width: 426px) {
  * {
    font-size: 0.8rem;
  }
}