* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  padding: 1rem; /* Add padding for small screens */
}

.container {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  width: 100%;
  max-width: 400px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

#sort-by {
  padding: 0.4rem;
  border-radius: 4px;
  border: 1px solid #ccc;
}

.summary {
  margin-top: 1rem;
  text-align: center;
  font-weight: bold;
}

@media (max-width: 600px) {
  .container {
    padding: 1rem;
  }
  #todo-form {
    flex-direction: column;
  }
  #todo-form input,
  #todo-form select,
  #todo-form button {
    margin-bottom: 0.5rem;
    width: 100%;
  }
  .controls {
    flex-direction: column;
    gap: 0.5rem;
  }
}

h1 {
  text-align: center;
  margin-bottom: 1rem;
}

#todo-form {
  display: flex;
  flex-wrap: wrap; /* Allow wrapping for smaller screens */
  margin-bottom: 1rem;
}

#todo-input {
  flex: 1;
  padding: 0.5rem;
  border: 1px solid #ccc;
  border-radius: 4px 0 0 4px;
}

#todo-form button {
  padding: 0.5rem 1rem;
  border: none;
  background-color: #28a745;
  color: white;
  border-radius: 0 4px 4px 0;
  cursor: pointer;
}

#todo-list {
  list-style: none;
}

#todo-form input[type="date"],
#todo-form input[type="time"],
#todo-form select {
  margin-left: 0.5rem;
  padding: 0.5rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  flex: 1; /* Make inputs flexible */
}

.todo-meta {
  font-size: 0.85rem;
  color: #555;
  margin-left: 0.5rem;
  display: block;
}

.priority-High {
  color: red;
}
.priority-Medium {
  color: orange;
}
.priority-Low {
  color: green;
}

.checkbox {
  margin-right: 0.5rem;
}

#todo-list li {
  padding: 0.5rem;
  margin-bottom: 0.5rem;
  background: #f9f9f9;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: 4px;
}

#todo-list li.completed {
  text-decoration: line-through;
  opacity: 0.6;
}

.remove-btn {
  background: #dc3545;
  border: none;
  color: white;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
}

.filters {
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
}

.filter-btn {
  margin: 0 0.25rem;
  padding: 0.5rem 1rem;
  border: none;
  background: #e0e0e0;
  cursor: pointer;
  border-radius: 4px;
}

.filter-btn.active {
  background: #007bff;
  color: white;
}

li.editing input {
  flex: 1;
  padding: 0.3rem;
  font-size: 1rem;
}