body {
  margin: 0;
  background: orange; /* 전체 배경 컬러 */
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}
.app {
  background: #fdf6f0;
  padding: 20px;
  border-radius: 16px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  width: 300px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.app-header {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}
.app-header h1 {
  text-align: center;
  margin: 0;
}
.date-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  gap: 8px;
}
.date-nav button {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 4px 8px;
  cursor: pointer;
}
.date-nav button:hover {
  filter: brightness(0.98);
}
.date-nav button:active {
  transform: translateY(1px);
}
.date-nav button:focus-visible {
  outline: 2px solid #2563eb;
  outline-offset: 2px;
}
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
/*입력*/
.input-section form {
  margin: 0;
}
.input-section input {
  width: 100%;
  padding: 8px;
  border-radius: 8px;
  border: none;
  background: #e9e9e9;
  font-size: 14px;
}
.input-section input:focus {
  outline: 2px solid #2563eb;
  outline-offset: 2px;
}
/*리스트*/
.list-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.list-section.scrolling {
  overflow-y: auto;
}
/*투두*/
.todo-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #c8f74b;
  padding: 8px 10px;
  border-radius: 8px;
}
.todo-item.done .title {
  text-decoration: line-through;
  opacity: 0.6;
}
.actions button {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 4px 8px;
  cursor: pointer;
}