/**
 * TubeRaker Modal System
 * Modal dialogs with overlay, focus trap, and keyboard handling
 */

/* ===== Modal Overlay ===== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-modal-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  padding: var(--spacing-md);
  overflow-y: auto;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* ===== Modal Container ===== */
.modal {
  position: relative;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  max-width: 32rem;
  width: 100%;
  max-height: calc(100vh - 2rem);
  display: flex;
  flex-direction: column;
  transform: scale(0.95) translateY(-1.25rem);
  transition: all var(--transition-base);
  z-index: var(--z-modal);
  margin: auto;
}

.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

/* ===== Modal Sizes ===== */
.modal-sm {
  max-width: 24rem;
}

.modal-md {
  max-width: 32rem;
}

.modal-lg {
  max-width: 48rem;
}

.modal-xl {
  max-width: 64rem;
}

.modal-full {
  max-width: calc(100vw - 2rem);
  max-height: calc(100vh - 2rem);
}

/* ===== Modal Header ===== */
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-primary);
  flex-shrink: 0;
}

.modal-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin: 0;
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  color: var(--text-secondary);
  background-color: transparent;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.modal-close:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.modal-close:focus-visible {
  outline: 0.125rem solid var(--color-brand-primary);
  outline-offset: 0.125rem;
}

/* ===== Modal Body ===== */
.modal-body {
  padding: var(--spacing-lg);
  overflow-y: auto;
  flex: 1;
  color: var(--text-secondary);
}

.modal-body::-webkit-scrollbar {
  width: 0.5rem;
}

.modal-body::-webkit-scrollbar-track {
  background: transparent;
}

.modal-body::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
}

/* ===== Modal Footer ===== */
.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-primary);
  flex-shrink: 0;
}

.modal-footer-start {
  justify-content: flex-start;
}

.modal-footer-center {
  justify-content: center;
}

.modal-footer-between {
  justify-content: space-between;
}

/* ===== Modal Variants ===== */
.modal-success .modal-header {
  border-bottom-color: var(--color-success);
}

.modal-warning .modal-header {
  border-bottom-color: var(--color-warning);
}

.modal-error .modal-header {
  border-bottom-color: var(--color-error);
}

.modal-info .modal-header {
  border-bottom-color: var(--color-info);
}

/* ===== Confirmation Modal ===== */
.modal-confirm {
  max-width: 28rem;
}

.modal-confirm .modal-body {
  padding: var(--spacing-xl);
  text-align: center;
}

.modal-confirm-icon {
  width: 3rem;
  height: 3rem;
  margin: 0 auto var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background-color: var(--bg-secondary);
}

.modal-confirm-icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.modal-confirm.modal-success .modal-confirm-icon {
  background-color: var(--color-success-bg);
  color: var(--color-success);
}

.modal-confirm.modal-warning .modal-confirm-icon {
  background-color: var(--color-warning-bg);
  color: var(--color-warning);
}

.modal-confirm.modal-error .modal-confirm-icon {
  background-color: var(--color-error-bg);
  color: var(--color-error);
}

.modal-confirm.modal-info .modal-confirm-icon {
  background-color: var(--color-info-bg);
  color: var(--color-info);
}

.modal-confirm-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.modal-confirm-message {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: var(--line-height-relaxed);
}

/* ===== Modal Animations ===== */
@keyframes modalFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes modalSlideIn {
  from {
    transform: scale(0.95) translateY(-1.25rem);
  }
  to {
    transform: scale(1) translateY(0);
  }
}

/* ===== Body Lock (prevent scrolling) ===== */
body.modal-open {
  overflow: hidden;
}

/* ===== Responsive Modal ===== */
@media (max-width: 767px) {
  .modal-overlay {
    padding: 0;
    align-items: flex-end;
  }

  .modal {
    max-width: 100%;
    max-height: 90vh;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    margin: 0;
  }

  .modal-full {
    max-height: 100vh;
    border-radius: 0;
  }

  .modal-footer {
    flex-direction: column-reverse;
  }

  .modal-footer .btn {
    width: 100%;
  }
}

/* ===== Accessibility ===== */
.modal[aria-hidden="true"] {
  display: none;
}

.modal[aria-hidden="false"] {
  display: flex;
}

/* Focus trap indicator (for development) */
.modal:focus {
  outline: none;
}

/* ===== Loading Modal ===== */
.modal-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  padding: var(--spacing-2xl);
}

.modal-loading .spinner {
  width: 3rem;
  height: 3rem;
  border-width: 0.1875rem;
}

.modal-loading-text {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  text-align: center;
}