* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: sans-serif;
  line-height: 1.45;
  color: #333;
  background-color: #f5f5f5;
}

#app {
  max-width: 640px;
  margin: 0 auto;
  padding: 20px 20px 20px;
}

h1 {
  margin: 0 0 14px;
  font-size: 24px;
}

.todo-form {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: flex-end;
  margin-bottom: 18px;
}

.todo-form label {
  display: block;
  font-size: 14px;
  font-weight: 600;
}

.todo-form .todo-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
}

.todo-form input {
  min-width: 224px;
  padding: 7px 10px;
  border: 1px solid #ccc;
  border-radius: 8px;
  font: inherit;
}

.todo-section + .todo-section {
  margin-top: 14px;
}

.todo-section h2 {
  margin: 0 0 8px;
  font-size: 17px;
}

.todo-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.todo-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 12px;
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
}

.todo-item__main {
  display: flex;
  flex: 1;
  align-items: center;
  align-self: stretch;
  gap: 8px;
  min-width: 0;
  margin: -8px 0 -8px -12px;
  padding: 8px 0 8px 12px;
  cursor: pointer;
}

.todo-item__main input[type='checkbox'] {
  width: 16px;
  height: 16px;
  margin: 0;
  flex-shrink: 0;
}

.todo-item + .todo-item {
  margin-top: 6px;
}

button {
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 7px 10px;
  font: inherit;
  background: #fff;
  cursor: pointer;
}

button:hover {
  border-color: #888;
}

button.danger {
  color: #b00020;
  border-color: #e0a0a8;
}

.confirm-dialog {
  max-width: 384px;
  padding: 20px;
  border: 1px solid #ccc;
  border-radius: 8px;
}

.confirm-dialog::backdrop {
  background: rgba(0, 0, 0, 0.35);
}

.confirm-dialog h2 {
  margin: 0 0 8px;
  font-size: 18px;
}

.confirm-dialog p {
  margin: 0 0 16px;
}

.confirm-dialog__actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* NG 版 */
.todo-panel {
  margin-bottom: 14px;
}

.todo-panel__title {
  margin: 0 0 8px;
  font-size: 17px;
}

.todo-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 12px;
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
}

.todo-row .check {
  width: 16px;
  height: 16px;
  border: 1px solid #ccc;
  border-radius: 4px;
  flex-shrink: 0;
}

.todo-list--bad {
  margin: 0;
  padding: 0;
  list-style: none;
}

.todo-row + .todo-row {
  margin-top: 6px;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.35);
}

.modal-overlay.is-open {
  display: flex;
}

.modal-box {
  width: min(384px, calc(100% - 32px));
  padding: 20px;
  background: #fff;
  border-radius: 8px;
}

.modal-box h2 {
  margin: 0 0 8px;
  font-size: 18px;
}

.modal-box p {
  margin: 0 0 16px;
}

.modal-box__actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}