/* ==============================================
   Modal
   ============================================== */

@keyframes modalFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes modalSlideIn {
  from { opacity: 0; transform: translateY(20px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: var(--spacing-4);
  animation: modalFadeIn 0.2s ease-out;
}

.modal-content {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 480px;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  animation: modalSlideIn 0.25s ease-out;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-4) var(--spacing-5);
  border-bottom: 1px solid var(--color-gray-100);
}

.modal-header h2 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-gray-900);
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  color: var(--color-gray-500);
  cursor: pointer;
  border-radius: var(--radius-full);
}

.modal-close:hover {
  background: var(--color-gray-100);
}

.modal-body {
  padding: var(--spacing-5);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-3);
  padding: var(--spacing-4) var(--spacing-5);
  border-top: 1px solid var(--color-gray-100);
}

/* ==============================================
   Enhanced Modal — Bottom Sheet + Polish
   ============================================== */

/* Backdrop blur */
.modal-overlay {
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

/* Refined close button */
.modal-close {
  width: 36px;
  height: 36px;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.modal-close:hover {
  background: var(--color-gray-100);
  color: var(--color-gray-700);
}

/* Drag handle for bottom sheet */
.modal-drag-handle {
  display: none;
}

/* Responsive modal — becomes bottom sheet on mobile */
.modal-responsive .modal-footer .btn {
  min-height: var(--touch-target-min, 44px);
}

@keyframes slideUpSheet {
  from { transform: translateY(100%); opacity: 0.8; }
  to { transform: translateY(0); opacity: 1; }
}

@media (max-width: 640px) {
  .modal-responsive {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    top: auto;
    max-height: 85vh;
    max-width: 100%;
    margin: 0;
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
    animation: slideUpSheet 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .modal-responsive .modal-drag-handle {
    display: block;
    width: 36px;
    height: 4px;
    background: var(--color-gray-300);
    border-radius: var(--radius-full);
    margin: var(--spacing-2) auto var(--spacing-1);
    flex-shrink: 0;
  }

  .modal-responsive .modal-footer {
    padding-bottom: max(var(--spacing-4), env(safe-area-inset-bottom));
  }

  .modal-responsive .modal-footer .btn {
    flex: 1;
  }
}