/**
 * Botões, campos e feedback comuns ao login e ao shell.
 * Criado: 2026-09-10 | Agente: Codex
 */
.user-btn, .btn {
  border: 0;
  border-radius: var(--radius-md);
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  background: var(--action-bg);
  color: var(--action-fg);
  font-weight: 650;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  white-space: nowrap;
  transition: background var(--ease), transform var(--ease), color var(--ease), border-color var(--ease);
}

.btn:hover { background: var(--action-hover-bg); color: var(--action-hover-fg); }
.user-btn:focus-visible, .btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.user-btn:disabled, .btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}
.btn-ghost, .user-btn {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-ghost:hover, .user-btn:hover {
  background: var(--color-surface-muted);
  color: var(--color-text);
  border-color: color-mix(in srgb, var(--color-primary) 35%, var(--color-border));
}
.btn-outline {
  background: transparent;
  color: var(--color-primary-strong);
  border: 1px solid color-mix(in srgb, var(--color-primary) 45%, var(--color-border));
}
.btn-outline:hover {
  background: color-mix(in srgb, var(--color-primary) 12%, transparent);
  color: var(--color-primary-strong);
}
.btn-danger { background: var(--danger-bg); color: var(--danger-fg); border-color: transparent; }
.btn-danger:hover { background: var(--danger-bg); color: var(--danger-fg); filter: brightness(.9); }
.btn-ghost.btn-danger {
  background: transparent;
  color: var(--color-danger-text);
  border-color: color-mix(in srgb, var(--color-danger) 40%, var(--color-border));
}
.btn-sm { padding: 0.35rem 0.7rem; font-size: 0.85rem; }

.flash {
  padding: 0.7rem 1rem;
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  border: 1px solid var(--color-border);
}
.flash-error { color: var(--color-danger-text); background: color-mix(in srgb, var(--color-danger) 12%, transparent); }
.flash-ok { color: var(--color-success-text); background: color-mix(in srgb, var(--color-success-text) 12%, transparent); }

select,
textarea,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
input[type="date"],
input[type="number"],
input[type="tel"],
input[type="url"],
input[type="file"] {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  color-scheme: inherit;
}
textarea { min-height: 5.5rem; resize: vertical; }
select:focus-visible,
textarea:focus-visible,
input:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--focus-ring);
}
select:disabled,
textarea:disabled,
input:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  background: var(--color-surface-muted);
}