:root {
  --bg: #0f1724;
  --card: #0b1220;
  --accent: #06b6d4;
  --danger: #ef4444;
  --muted: #94a3b8;
}
body {
  margin: 0;
  font-family: Inter, sans-serif;
  background: var(--bg);
  color: #e6eef6;
  display: flex;
  justify-content: center;
  padding: 20px;
}
.app {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 20px;
  width: 100%;
  max-width: 1100px;
}
.card {
  background: var(--card);
  padding: 16px;
  border-radius: 12px;
}
header h1 {
  margin: 0;
}
.sidebar input,
.sidebar form input,
select,
textarea {
  width: 100%;
  padding: 8px;
  margin-top: 4px;
  margin-bottom: 8px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: transparent;
  color: #fff;
}
.primary {
  background: linear-gradient(90deg, var(--accent), #7c3aed);
  border: none;
  padding: 8px 12px;
  color: #fff;
  border-radius: 8px;
  cursor: pointer;
}
.tasks {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
  margin-top: 12px;
}
.task {
  background: rgba(255, 255, 255, 0.02);
  padding: 12px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.02);
}
.task.done {
  opacity: 0.6;
  text-decoration: line-through;
}

/* Botões */
.btn {
  padding: 6px 12px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s ease;
}

/* Botão primário (adicionar) */
.primary {
  background: linear-gradient(90deg, #06b6d4, #7c3aed);
  color: #fff;
}

/* Botão excluir (danger) */
.btn.delete-user,
.btn.delete-task {
  background: linear-gradient(90deg, #ef4444, #f87171);
  color: #fff;
  margin-left: 8px;
}

.btn:hover {
  transform: translateY(-2px);
  opacity: 0.9;
}