/**
 * buttons.css — Shared button styles for primary, secondary, and disabled states.
 * Primary buttons use the shiny blue glow effect on hover and focus.
 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  line-height: 1.4;
}

.btn:disabled,
.btn--disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn--primary {
  background-color: var(--accent-blue-bright);
  color: #ffffff;
  box-shadow: 0 0 0 transparent;
}

.btn--primary:hover:not(:disabled) {
  background-color: #388bfd;
  box-shadow: 0 0 12px var(--accent-blue-glow);
  text-decoration: none;
}

.btn--primary:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
  box-shadow: 0 0 12px var(--accent-blue-glow);
}

.btn--secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn--secondary:hover:not(:disabled) {
  background-color: var(--border-color);
  border-color: var(--text-secondary);
}

.btn--loading {
  position: relative;
  pointer-events: none;
}

.btn__spinner {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

@media (max-width: 480px) {
  .btn {
    width: 100%;
  }

  .btn-group {
    flex-direction: column;
  }
}