/*
 * Buttons — DESIGN.md §4 "Buttons". Dark text on neon fills, glow on focus.
 * Full width on Mobile, auto width from the Tablet breakpoint up.
 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  min-height: 44px;
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-ui);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-none);
  letter-spacing: var(--tracking-button);
  color: var(--color-foreground);
  text-decoration: none;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-standard);
  cursor: pointer;
  transition: background-color 120ms ease, color 120ms ease, border-color 120ms ease, box-shadow 120ms ease;
  -webkit-tap-highlight-color: transparent;
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--glow-purple);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn--primary {
  color: var(--color-night);
  background-color: var(--color-purple);
}

.btn--primary:hover:not(:disabled) {
  background-color: #A796FF;
}

.btn--ghost {
  color: var(--color-foreground);
  border-color: var(--color-border);
}

.btn--ghost:hover:not(:disabled) {
  background-color: var(--color-card-raised);
}

.btn--danger {
  color: var(--color-red);
  background-color: rgba(255, 149, 128, 0.1);
}

.btn--danger:hover:not(:disabled) {
  background-color: rgba(255, 149, 128, 0.18);
}

.btn--success {
  color: var(--color-night);
  background-color: var(--color-green);
}

.btn--icon {
  width: 44px;
  padding: 0;
  border-radius: var(--radius-circle);
}

.btn--sm {
  min-height: 36px;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-md);
}

.btn:hover {
  text-decoration: none;
}

@media (min-width: 640px) {
  .btn {
    width: auto;
  }

  .btn--block {
    width: 100%;
  }
}