:root {
  color-scheme: light;
  font-family: "Microsoft YaHei", "Segoe UI", sans-serif;
  color: #20242a;
  background: #f5f6f8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
}

.app {
  width: min(100% - 32px, 640px);
  margin: 64px auto;
  padding: 32px;
  border: 1px solid #e4e7eb;
  border-radius: 12px;
  background: #fff;
}

h1 {
  margin: 0 0 28px;
  font-size: 28px;
}

h2 {
  margin: 32px 0 12px;
  font-size: 18px;
}

.task-entry {
  display: flex;
  gap: 12px;
}

input {
  flex: 1;
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid #aeb5be;
  border-radius: 6px;
  font: inherit;
}

button {
  padding: 10px 20px;
  border: 0;
  border-radius: 6px;
  background: #d8dde3;
  color: #59616c;
  font: inherit;
}

#task-list {
  margin: 0;
  padding-left: 24px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}