/* ==========================================================================
   Component: Modal
   .modal-overlay with backdrop, .modal, .modal__header/body/footer.
   Includes open/close animations.
   ========================================================================== */

/* ---------------------------------------------------------------------------
   Overlay / Backdrop
   --------------------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--transition-base),
    visibility var(--transition-base);
}

.modal-overlay.is-open,
.modal-overlay.show {
  opacity: 1;
  visibility: visible;
}

/* ---------------------------------------------------------------------------
   Modal Container
   --------------------------------------------------------------------------- */
.modal {
  position: relative;
  width: 100%;
  max-width: 480px;
  max-height: calc(100vh - var(--space-8));
  max-height: calc(100dvh - var(--space-8));
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(0.95) translateY(8px);
  transition:
    transform var(--transition-base),
    opacity var(--transition-base);
  opacity: 0;
}

.modal-overlay.is-open .modal,
.modal-overlay.show .modal {
  transform: scale(1) translateY(0);
  opacity: 1;
}

/* Size variants */
.modal--sm {
  max-width: 360px;
}

.modal--lg {
  max-width: 640px;
}

.modal--xl {
  max-width: 800px;
}

/* ---------------------------------------------------------------------------
   Header
   --------------------------------------------------------------------------- */
.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-muted);
  flex-shrink: 0;
}

.modal__title {
  font-size: var(--text-md);
  font-weight: var(--weight-semibold);
  color: var(--text-primary);
  line-height: var(--leading-tight);
}

.modal__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition:
    color var(--transition-fast),
    background-color var(--transition-fast);
  flex-shrink: 0;
}

.modal__close:hover {
  color: var(--text-primary);
  background-color: var(--bg-elevated);
}

.modal__close:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

/* ---------------------------------------------------------------------------
   Body
   --------------------------------------------------------------------------- */
.modal__body {
  flex: 1;
  padding: var(--space-5);
  overflow-y: auto;
  min-height: 0;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-normal);
}

.modal__body > * + * {
  margin-top: var(--space-3);
}

/* ---------------------------------------------------------------------------
   Footer
   --------------------------------------------------------------------------- */
.modal__footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-top: 1px solid var(--border-muted);
  flex-shrink: 0;
}

/* ---------------------------------------------------------------------------
   Keyframe animations (for JS-triggered class toggling)
   --------------------------------------------------------------------------- */
@keyframes modal-enter {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(8px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@keyframes modal-exit {
  from {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
  to {
    opacity: 0;
    transform: scale(0.95) translateY(8px);
  }
}

@keyframes overlay-enter {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes overlay-exit {
  from { opacity: 1; }
  to   { opacity: 0; }
}

.modal-overlay.is-entering {
  animation: overlay-enter var(--duration-normal) var(--ease-out) forwards;
}

.modal-overlay.is-entering .modal {
  animation: modal-enter var(--duration-normal) var(--ease-out) forwards;
}

.modal-overlay.is-exiting {
  animation: overlay-exit var(--duration-fast) var(--ease-in) forwards;
}

.modal-overlay.is-exiting .modal {
  animation: modal-exit var(--duration-fast) var(--ease-in) forwards;
}

/* ---------------------------------------------------------------------------
   Body scroll lock — applied to html/body when modal is open
   --------------------------------------------------------------------------- */
.has-modal-open {
  overflow: hidden;
}

/* ---------------------------------------------------------------------------
   Reduced motion
   --------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .modal-overlay,
  .modal,
  .modal-overlay.is-entering,
  .modal-overlay.is-entering .modal,
  .modal-overlay.is-exiting,
  .modal-overlay.is-exiting .modal {
    animation: none;
    transition: none;
  }

  .modal-overlay.is-open .modal {
    transform: none;
  }
}