style.css

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-color: #fff;
  --color-success: #5f9341;
  --error-color: #ff5872;
}

body {
  padding: 1rem;
  min-width: 400px;
  background-color: var(--bg-color);
}

input {
  border: 1px solid var(--color-success);
  padding: 10px;
  width: 100%;
  margin-bottom: 4px;
  border-radius: 5px;
  max-width: 400px;
}

input[disabled="true"] {
  cursor: not-allowed;
}

#input-btn,
#delete-btn,
#save-tab-btn {
  background-color: var(--color-success);
  color: #fff;
  border: none;
  padding: 10px 0;
  border-radius: 5px;
  cursor: pointer;
  font-weight: bold;
}
#delete-btn {
  background-color: var(--bg-color);
  color: #5f9341;
  border: 1px solid var(--color-success);
}

#ul-el {
  list-style: none;
  padding-left: 0;
  margin-top: 8px;
}
#ul-el li {
  margin-top: 5px;
}
a {
  color: #5f9341;
  font-size: 14px;
  line-height: 19px;
}

#delete-item {
  all: unset;
  cursor: pointer;
  margin-left: 4px;
}

.buttons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  column-gap: 8px;
}

.flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

li > * {
  font-size: 12px;
  line-height: 16px;
}

.error-exits {
  color: var(--error-color);
  font-size: 16px;
  line-height: 19px;
  font-weight: 500;
  margin-top: 4px;
  text-transform: capitalize;
  display: none;
}