/**
 * 框架级 UI 组件库 — Toast / ConfirmDialog / Modal / Button
 * Depends on: tokens.css
 */

/* Toast 容器 */
.ui-toast-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}

.ui-toast {
  pointer-events: auto;
  min-width: 280px;
  max-width: 400px;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border-left: 4px solid var(--color-primary);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  animation: ui-toast-in 0.25s var(--ease-out);
}

.ui-toast.success { border-left-color: var(--color-success); }
.ui-toast.error { border-left-color: var(--color-error); }
.ui-toast.warning { border-left-color: var(--color-warning); }
.ui-toast.info { border-left-color: var(--color-info); }

.ui-toast-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 1px;
}

.ui-toast-content {
  flex: 1;
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: var(--leading-normal);
}

@keyframes ui-toast-in {
  from { opacity: 0; transform: translateX(100%); }
  to { opacity: 1; transform: translateX(0); }
}

.ui-toast.leaving {
  animation: ui-toast-out 0.2s var(--ease-in) forwards;
}

@keyframes ui-toast-out {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(100%); }
}

/* Global Loading Indicator */
.ui-global-loading {
  --ui-loading-bg: var(--cs-bg, var(--color-bg));
  --ui-loading-surface: var(--cs-card, var(--color-surface));
  --ui-loading-text: var(--cs-fg, var(--color-text));
  --ui-loading-muted: var(--cs-muted, var(--color-text-secondary));
  --ui-loading-border: var(--cs-border, var(--color-border));
  --ui-loading-accent: var(--cs-primary, var(--color-primary));
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-toast) + 20);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: max(var(--space-6), env(safe-area-inset-top)) var(--space-4) var(--space-4);
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.18s var(--ease-out), visibility 0.18s var(--ease-out);
}

.ui-global-loading.is-visible {
  opacity: 1;
  visibility: visible;
}

.ui-global-loading__veil {
  position: absolute;
  inset: 0;
  background: transparent;
  backdrop-filter: blur(2px);
}

@supports (background: color-mix(in srgb, white 50%, transparent)) {
  .ui-global-loading__veil {
    background: color-mix(in srgb, var(--ui-loading-bg) 52%, transparent);
  }
}

.ui-global-loading__panel {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  width: min(420px, calc(100vw - var(--space-8)));
  min-height: 58px;
  padding: var(--space-3) var(--space-4);
  color: var(--ui-loading-text);
  background: var(--ui-loading-surface);
  border: 1px solid var(--ui-loading-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  backdrop-filter: blur(var(--glass-blur));
  transform: translateY(-8px) scale(0.98);
  transition: transform 0.18s var(--ease-out), box-shadow 0.18s var(--ease-out);
}

@supports (background: color-mix(in srgb, white 50%, transparent)) {
  .ui-global-loading__panel {
    background: color-mix(in srgb, var(--ui-loading-surface) 88%, transparent);
  }
}

.ui-global-loading.is-visible .ui-global-loading__panel {
  transform: translateY(0) scale(1);
}

.ui-global-loading__icon {
  width: 36px;
  height: 36px;
  min-width: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ui-loading-accent);
}

.ui-global-loading__svg {
  width: 36px;
  height: 36px;
  animation: ui-global-loading-spin 0.9s linear infinite;
}

.ui-global-loading__track {
  opacity: 0.16;
}

.ui-global-loading__arc,
.ui-global-loading__dot {
  opacity: 0.92;
}

.ui-global-loading__copy {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.ui-global-loading__title {
  color: var(--ui-loading-text);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
}

.ui-global-loading__message {
  color: var(--ui-loading-muted);
  font-size: var(--text-xs);
  line-height: var(--leading-normal);
}

.ui-global-loading.is-long .ui-global-loading__panel {
  box-shadow: var(--shadow-xl);
}

@keyframes ui-global-loading-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@media (max-width: 640px) {
  .ui-global-loading {
    padding-top: max(var(--space-4), env(safe-area-inset-top));
  }

  .ui-global-loading__panel {
    width: min(360px, calc(100vw - var(--space-6)));
    padding: var(--space-3);
  }
}

@media (prefers-reduced-motion: reduce) {
  .ui-global-loading,
  .ui-global-loading__panel {
    transition: none;
  }

  .ui-global-loading__svg {
    animation: none;
  }
}

/* ConfirmDialog */
.ui-confirm-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-overlay);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: ui-fade-in 0.2s var(--ease-out);
}

.ui-confirm-dialog {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 320px;
  max-width: 90vw;
  animation: ui-scale-in 0.2s var(--ease-out);
}

.ui-confirm-header {
  padding: var(--space-5) var(--space-6) var(--space-3);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text);
}

.ui-confirm-body {
  padding: var(--space-3) var(--space-6) var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  white-space: pre-wrap;
  word-break: break-all;
}

.ui-confirm-footer {
  padding: var(--space-4) var(--space-6) var(--space-5);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
}

.ui-confirm-btn {
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  border: none;
  transition: background 0.15s var(--ease-default), transform 0.1s var(--ease-default);
}

.ui-confirm-btn:active { transform: scale(0.98); }

.ui-confirm-btn-cancel {
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.ui-confirm-btn-cancel:hover {
  background: var(--color-border);
}

.ui-confirm-btn-ok {
  background: var(--color-primary);
  color: var(--color-surface);
}

.ui-confirm-btn-ok:hover {
  background: var(--color-primary-hover);
}

.ui-confirm-btn-danger {
  background: var(--color-error);
  color: var(--color-surface);
}

.ui-confirm-btn-danger:hover {
  background: var(--color-error-dark);
}

@keyframes ui-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes ui-scale-in {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

/* Modal 基础 */
.ui-modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-overlay);
  z-index: var(--z-modal-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: ui-fade-in 0.2s var(--ease-out);
}

.ui-modal {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  animation: ui-scale-in 0.2s var(--ease-out);
}

.ui-modal-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.ui-modal-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text);
}

.ui-modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: var(--text-xl);
  line-height: 1;
  transition: background 0.15s var(--ease-default), color 0.15s var(--ease-default);
}

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

.ui-modal-body {
  padding: var(--space-6);
  overflow-y: auto;
  flex: 1;
}

.ui-modal-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* Button 标准类（供现有页面复用） */
.ui-btn {
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  border: none;
  transition: background 0.15s var(--ease-default), transform 0.1s var(--ease-default);
}

.ui-btn:active { transform: scale(0.98); }
.ui-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.ui-btn-primary {
  background: var(--color-primary);
  color: var(--color-surface);
}

.ui-btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

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

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

.ui-btn-danger {
  background: var(--color-error);
  color: var(--color-surface);
}

.ui-btn-danger:hover:not(:disabled) {
  background: var(--color-error-dark);
}

.ui-btn-success {
  background: var(--color-success);
  color: var(--color-surface);
}

.ui-btn-success:hover:not(:disabled) {
  background: var(--color-success-dark);
}

/* Card 标准类 */
.ui-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}