/* Paleta de cores escolhida */
:root {
  --dark-bg: #57564f;
  --dark-card: #7a7a73;
  --dark-text: #f8f3ce;
  --dark-accent: #dddad0;

  --light-bg: #f8f3ce;
  --light-card: #dddad0;
  --light-text: #57564f;
  --light-accent: #7a7a73;
}

/* Tema padrão (claro) */
body {
  font-family: Arial, sans-serif;
  background: var(--light-card);
  color: var(--light-text);
  margin: 0;
  padding: 0;
  transition: all 0.3s ease;
}

/* Tema escuro */
body.dark {
  background: var(--dark-bg);
  color: var(--dark-bg);
}

.container {
  max-width: 500px;
  margin: 30px auto;
  background: var(--light-card);
  padding: 20px;
  border-radius: 15px;
  box-shadow: 0 0 10px rgba(0,0,0,0.2);
  transition: all 0.3s ease;
}

body.dark .container {
  background: var(--dark-card);
}

/* Input */
.task-input {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

.task-input input {
  flex: 1;
  padding: 10px;
  border-radius: 10px;
  border: 1px solid var(--light-accent);
}

body.dark .task-input input {
  border: 1px solid var(--dark-accent);
  background: #444;
  color: var(--dark-text);
}

button {
  padding: 10px 15px;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: 0.3s;
}

button:hover {
  opacity: 0.8;
}

/* Lista de tarefas */
.task-box ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.task-box li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--light-bg);
  margin: 8px 0;
  padding: 10px;
  border-radius: 10px;
  transition: all 0.3s ease;
}

body.dark .task-box li {
  background: var(--dark-accent);
}

.task-box li.completed {
  text-decoration: line-through;
  opacity: 0.6;
}

/* Botão tema */
.theme-btn {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--light-card);
  border-radius: 50%;
  font-size: 20px;
}

body.dark .theme-btn {
  background: var(--dark-card);
}

/* Footer fixo */
#how-to {
  position: fixed;
  bottom: 10px;
  right: 10px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 12px;
}