index.css

* {
    margin: auto;
    padding: 0;
    font-family: 'Inter', sans-serif;
    font-size: 16px;
}

body {
  display: flex;
  width: 20rem;
  margin-bottom: 2.875rem;
}

header {
    display: flex;
    align-items: center;
    position: fixed;
    background-color: #fff;
    width: 20rem;
    height: 5.625rem;
}

.input-wrapper {
  display: flex;
  flex-direction: column;
  /* align-items: flex-start; */
  /* justify-content: left; */
}
.color-wrapper {
  display: flex;
}

.color-input {
  margin: 0 1.125rem;
  height: 2.625rem;
  border: none;
  cursor: pointer;
}

.dropdown,
.hex-input {
  width: 10rem;
  height: 2rem;
  border: 1px solid #D1D5DB;
  box-shadow: 0px 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 6px;
  cursor: pointer;
}

.hex-input {
  /* margin-left: 5.5rem; */
  padding-left: 0.25rem;
  width: 9.75rem;
  margin: 0 auto 0 0;
  align-self: flex-start;
}

.get-color-btn {
  width: 7.6875rem;
  height: 2.625rem;
  margin: 1.75rem 1.125rem;
  border: 1px solid #D1D5DB;
  box-shadow: 0px 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
  font-weight: 500;
  font-size: 12px;
  line-height: 16px;
  cursor: pointer;
}

select {
  font-weight: 400;
}

select option {
  padding: 0.5rem 0;
}

option:checked {
  font-weight: 600;
}

.color-display {
  display: flex;
}

.color-display div {
  width: 4rem;
  height: 34.375rem;
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-around;
  position: fixed;
  width: 20rem;
  height: 2.875rem;
  left: auto;
  top: 31.5rem;
  flex-shrink: 0;
  background-color: #fff;
  opacity: 0.8;
}

footer button {
  border: none;
  background-color: #fff;
  font-family: inherit;
  font-weight: 500;
  font-size: 12px;
  line-height: 24px;
  color: #2B283A;
  cursor: pointer;
  writing-mode: vertical-rl;
  /* transform: rotate(-180deg); */
}