styles.css

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

body {
  background: #ffcc91;
  background: linear-gradient(to bottom left, #f6d365, #ffa991);
  color: #fff;
  font-family: sans-serif;
  min-height: 100vh;
}

header {
  min-height: 20vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  margin: 0 5px;
}

.github-corner svg:hover, .github-corner:focus svg {
  fill: #e68f78 !important;
}

.github-corner:hover .octo-arm, .github-corner:focus .octo-arm {
  animation: octocat-wave 560ms ease-in-out;
}

@keyframes octocat-wave {
  0%,
  100% {
    transform: rotate(0);
  }
  20%,
  60% {
    transform: rotate(-25deg);
  }
  40%,
  80% {
    transform: rotate(10deg);
  }
}

a {
  color: white;
}

a:hover {
  color: #885345;
}

button {
  color: #ffa991;
  background: #fff;
  cursor: pointer;
}

button:hover,
button:focus {
  background: #ffa991;
  color: #fff;
}

form {
  display: flex;
  justify-content: center;
  align-items: center;
}

form input,
form button {
  padding: 0.5rem;
  font-size: 1rem;
  background: #fff;
  outline: none;
  border: none;
  transition: all 0.3s ease;
}

form input {
  border-radius: 10px 0 0 10px;
  width: 300px;
}

form input:focus {
  background: #f5f5f5;
}

form button {
  border-radius: 0 10px 10px 0;
}

.buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 10vh;
  width: fit-content;
  margin: 0 auto;
}

.buttons button {
  border: none;
  outline: none;
  margin: 1px;
  border-radius: 3px;
}

.todo-container {
  display: flex;
  justify-content: center;
  align-items: center;
}

.todo-message {
  text-align: center;
}

.todo-list {
  min-width: 50%;
  list-style: none;
  padding: 0;
}

.todo-item {
  margin: 0 0.5rem 0.5rem 0.5rem;
  padding: 0.2rem;
  background: #fff;
  color: #000;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.3s ease;
  border-radius: 5px;
}

.todo-item span {
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.todo-item-left {
  display: flex;
  align-items: center;
  flex-grow: 1;
}

.todo-item p, .todo-item span {
  margin: 4px;
}

.todo-item p {
  text-decoration: line-through transparent;
  cursor: pointer;
  transition: color 0.3s, text-decoration-color 0.7s;
  width: 100%;
}

.todo-item p:hover {
  color: #4d4d4d;
}

.todo-item p.completed {
  color: #6e6e6e;
  text-decoration-color: #6e6e6e;
}

.todo-item .delete:hover {
  color: #d31f1f;
}

.todo-enter-active {
  transition: all 0.5s cubic-bezier(0.415, 0.1, 0.37, 1.355);
}

.todo-leave-active {
  transition: all 0.2s;
  position: absolute;
}

.todo-enter,
.todo-leave-to {
  transform: translateY(30px);
  opacity: 0;
}

@media (max-width: 769px) {
  .todo-list {
    min-width: 70%;
  }
}

@media (max-width: 500px) {
  .github-corner:hover .octo-arm {
    animation: none;
  }
  .github-corner .octo-arm {
    animation: octocat-wave 560ms ease-in-out;
  }
  form {
    width: 90%;
    margin: 0 auto;
  }
}

@media (max-width: 426px) {
  .todo-list {
    width: 100%;
  }
}

.help {
  position: fixed;
  top: 0;
  left: 0;
  padding: 1px;
  margin: 1px;
  cursor: pointer;
  font-size: 36px;
  color: #ffffffa1;
}

.introjs-tooltip {
  color: black;
}