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

/* VARIÁVEIS */
:root {
  --bg-dark: #0f0f1a;
  --card-dark: #1a1a2e;
  --purple: #7c4dff;
  --text: #eaeaff;
  --gray: #9fa0b4;
}

/* BODY */
body {
  font-family: Arial, Helvetica, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text);
  min-height: 100vh;
}

/* HEADER */
.header {
  text-align: center;
  padding: 2.5rem 1rem;
  background: linear-gradient(135deg, #14142b, #1a1a3c);
}

.header h1 {
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
}

.header p {
  color: var(--gray);
}

/* CONTAINER */
.container {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}

/* SEÇÕES */
section {
  background-color: var(--card-dark);
  padding: 1.5rem;
  border-radius: 12px;
  margin-bottom: 1.5rem;
}

/* FORMULÁRIO */
.add-task form {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

.add-task input {
  flex: 1;
  padding: 0.7rem;
  border-radius: 8px;
  border: none;
  font-size: 1rem;
}

.add-task button {
  background-color: var(--purple);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 0.7rem 1.2rem;
  cursor: pointer;
  transition: 0.2s;
}

.add-task button:hover {
  opacity: 0.85;
}

/* FILTROS */
.filters {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
}

.filters button {
  flex: 1;
  background: transparent;
  border: 1px solid var(--purple);
  color: var(--purple);
  padding: 0.6rem;
  border-radius: 8px;
  cursor: pointer;
  transition: 0.2s;
}

.filters button.active,
.filters button:hover {
  background-color: var(--purple);
  color: white;
}

/* LISTA */
.task-list ul {
  list-style: none;
  margin-top: 1rem;
}

.task-list li {
  background-color: #23234a;
  padding: 0.8rem;
  border-radius: 8px;
  margin-bottom: 0.6rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* FOOTER */
.footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--gray);
  font-size: 0.9rem;
}
/* ANIMAÇÕES */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.task-list li {
  animation: fadeIn 0.3s ease;
}

/* TAREFA CONCLUÍDA */
.task-list li.completed span {
  text-decoration: line-through;
  color: var(--gray);
}

/* BOTÕES DAS TAREFAS */
.task-list button {
  background: transparent;
  border: none;
  color: var(--purple);
  font-size: 1rem;
  cursor: pointer;
  margin-left: 0.4rem;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.task-list button:hover {
  transform: scale(1.2);
  opacity: 0.8;
}