body {
  font-family: sans-serif;
  background: #f9f9f9;
  margin: 0;
  padding: 0;
}
#app {
  max-width: 100%;
  min-width: 0;
  margin: 24px auto;
  background: #fff;
  border: 1px solid #ddd;
  padding: 12px 4px 8px 4px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
@media (min-width: 480px) {
  #app {
    max-width: 400px;
    padding: 16px 12px 12px 12px;
  }
}
h1 {
  font-size: 1.3em;
  margin: 0 0 8px 0;
}
form {
  display: flex;
  gap: 4px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
form input[type="text"] {
  width: 8em;
  min-width: 0;
}
form input[type="date"] {
  width: 7em;
  min-width: 0;
}
form select {
  width: 5em;
}
input, select, button {
  font-size: 1em;
  padding: 6px 4px;
  border-radius: 4px;
}
#todo-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.todo-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #eee;
  padding: 4px 0;
}
.todo-title {
  flex: 1;
  margin-right: 8px;
  word-break: break-all;
}
.todo-date {
  font-size: 0.9em;
  color: #888;
  margin-right: 8px;
}
.todo-repeat {
  font-size: 0.85em;
  color: #aaa;
  margin-right: 8px;
}
.expired {
  background: #ffeaea;
  color: #d00;
  font-weight: bold;
}
.days-left {
  font-size: 0.9em;
  color: #0a0;
  margin-right: 8px;
}
.todo-item button {
  display: none;
}
.todo-item.selected button {
  display: inline-block;
}
button {
  cursor: pointer;
}
.completed {
  background: #f2f2f2;
  color: #888;
}
.completed .todo-title {
  text-decoration: line-through;
}
.completed button {
  text-decoration: none;
}
#subtle-menu {
  position: fixed;
  top: 8px;
  right: 8px;
  z-index: 100;
}
.subtle-btn {
  background: #f5f5f5;
  color: #888;
  border: 1px solid #eee;
  font-size: 0.9em;
  padding: 6px 10px;
  margin-right: 2px;
  margin-bottom: 2px;
  border-radius: 4px;
  transition: background 0.2s;
}
.subtle-btn:hover {
  background: #e0e0e0;
  color: #555;
}
form input[type="number"] {
  width: 5em;
  min-width: 0;
}
@media (max-width: 480px) {
  form input, form select, form button {
    font-size: 1em;
    padding: 6px 2px;
  }
  form input[type="text"] {
    width: 100%;
    flex: 1 1 100%;
  }
}