* {
  box-sizing: border-box;
}

:root {
  --async-color: #7b68ee;
  --sync-color: #b53389;
  --done-color: green;
}

body {
  margin: 0;
  padding: 1rem;
  font-family: "Arial", sans-serif;
  text-align: center;
  background-color: rgba(0, 0, 0, 0.8);
  color: white;
}

h1 {
  margin: 3rem 0;
}

main {
  display: flex;
  justify-content: center;
  gap: 1rem;
  max-width: 1000px;
  margin: 0 auto 2rem auto;
}

.tasks {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem;
  border-radius: 0.5rem;
  transition: background-color 0.3s ease-in-out;
}

.tasks[data-mode="sync"] {
  background-color: var(--sync-color);
}

.tasks[data-mode="async"] {
  background-color: var(--async-color);
}

.tasks.done {
  background-color: var(--done-color);
}

.tasks .status {
  min-height: 1.5rem;
}

.task progress {
  width: 100%;
  height: 1.5rem;
  border-radius: 0;
}

.task progress[value="100"]::-webkit-progress-bar {
  background-color: rgba(0, 0, 0, 0.6);
}

.task progress::-webkit-progress-bar {
  background-color: rgba(0, 0, 0, 0.2);
  transition: background-color 0.3s ease-in-out;
}

.task progress::-webkit-progress-value {
  background-color: rgba(0, 0, 0, 0.5);
}

button {
  line-height: 3rem;
  padding: 0 2rem;
  border: none;
  background-color: rgba(0, 0, 0, 0.5);
  color: white;
  border-radius: 0.25rem;
  font-size: 1.2rem;
  transition: background-color 0.2s ease-in-out;
}

button:not([disabled]):hover {
  background-color: rgba(0, 0, 0, 0.4);
}

button[disabled] {
  cursor: not-allowed;
  background-color: rgba(0, 0, 0, 0.2);
}