/* ================================================
   AI全域商业OS — Design System v5.0
   对标 Stripe / Linear / Notion / Vercel
   色彩升级：深海蓝品牌色 + 极深炭灰侧边栏
   字体升级：Inter + Plus Jakarta Sans + JetBrains Mono
   ================================================ */

/* --- Color System v5.0 --- */
:root {
  /* Brand — 深海蓝，比 v3.0 的 #2563EB 更深邃明亮 */
  --color-brand: #3B7DFF;
  --color-brand-light: #60A5FA;
  --color-brand-lighter: #BCD4FF;
  --color-brand-dark: #2563EB;
  --color-brand-50: #EEF4FF;
  --color-brand-100: #D9E6FF;
  --color-brand-200: #BCD4FF;
  --color-brand-300: #8EB8FF;
  --color-brand-400: #5A95FF;
  --color-brand-500: #3B7DFF;
  --color-brand-600: #2563EB;
  --color-brand-700: #1D4ED8;
  --color-brand-800: #1E40AF;
  --color-brand-900: #1E3A5F;

  /* Semantic */
  --color-success: #10B981;
  --color-success-light: #D1FAE5;
  --color-warning: #F59E0B;
  --color-warning-light: #FEF3C7;
  --color-danger: #EF4444;
  --color-danger-light: #FEE2E2;
  --color-info: #3B7DFF;
  --color-info-light: #DBEAFE;
  --color-neutral: #6B7280;

  /* Neutrals — Slate scale */
  --color-slate-50: #F8FAFC;
  --color-slate-100: #F1F5F9;
  --color-slate-200: #E2E8F0;
  --color-slate-300: #CBD5E1;
  --color-slate-400: #94A3B8;
  --color-slate-500: #64748B;
  --color-slate-600: #475569;
  --color-slate-700: #334155;
  --color-slate-800: #1E293B;
  --color-slate-900: #0F172A;
  --color-slate-950: #020617;

  /* Sidebar — 极深炭灰，比 v3.0 的 #0F172A 更深更沉浸 */
  --sidebar-bg: #0B1120;
  --sidebar-bg-hover: #111827;
  --sidebar-bg-active: #1E293B;
  --sidebar-hover: rgba(255, 255, 255, 0.06);
  --sidebar-active: #1E293B;
  --sidebar-active-border: #3B7DFF;
  --sidebar-text: #94A3B8;
  --sidebar-text-hover: #F8FAFC;
  --sidebar-text-active: #F8FAFC;
  --sidebar-icon: #64748B;
  --sidebar-icon-active: #60A5FA;
  --sidebar-border: #1E293B;
  --sidebar-accent: #3B7DFF;
  --sidebar-width: 260px;
  --sidebar-collapsed-width: 64px;

  /* Backgrounds */
  --bg-page: #F8FAFC;
  --bg-card: #FFFFFF;
  --bg-card-hover: #FAFBFC;
  --bg-elevated: #FFFFFF;
  --bg-hover: #F1F5F9;
  --bg-active: #EFF6FF;
  --bg-input: #F8FAFC;
  --bg-header: #FFFFFF;

  /* Text */
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-tertiary: #94A3B8;
  --text-inverse: #F8FAFC;
  --text-link: #3B7DFF;

  /* Borders */
  --border-default: #E2E8F0;
  --border-light: #F1F5F9;
  --border-strong: #CBD5E1;
  --border-hover: #CBD5E1;

  /* Shadows — 4级阴影系统 */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-modal: 0 25px 50px -12px rgba(0, 0, 0, 0.15), 0 12px 24px -8px rgba(0, 0, 0, 0.08);

  /* Typography — 3字体系统 */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Noto Sans CJK SC', 'Microsoft YaHei', sans-serif;
  --font-display: 'Plus Jakarta Sans', 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;

  --text-xs: 12px;
  --text-sm: 13px;
  --text-base: 14px;
  --text-lg: 16px;
  --text-xl: 18px;
  --text-2xl: 20px;
  --text-3xl: 24px;
  --text-display: 28px;

  --leading-tight: 1.2;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;

  /* Radius — 4级圆角系统 */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 16px;
  --radius-3xl: 16px;
  --radius-full: 9999px;

  /* Spacing — 4px基础单位 */
  --space-0: 0px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* Layout */
  --header-height: 56px;
  --page-padding: 24px;
  --page-max-width: 1400px;
  --card-padding: 20px;
  --card-gap: 16px;
  --section-gap: 24px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-index */
  --z-sidebar: 100;
  --z-header: 90;
  --z-dropdown: 200;
  --z-modal: 300;
  --z-toast: 400;
}

/* --- Global Resets --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg-page);
  line-height: var(--leading-normal);
  overflow: hidden;
  height: 100vh;
}

#app {
  height: 100vh;
  overflow: hidden;
}

/* --- Element Plus Overrides — Global Theme v5.0 --- */

/* Primary color — 深海蓝 */
:root {
  --el-color-primary: #3B7DFF;
  --el-color-primary-light-3: #60A5FA;
  --el-color-primary-light-5: #8EB8FF;
  --el-color-primary-light-7: #BCD4FF;
  --el-color-primary-light-9: #D9E6FF;
  --el-color-primary-dark-2: #2563EB;
  --el-color-success: #10B981;
  --el-color-warning: #F59E0B;
  --el-color-danger: #EF4444;
  --el-color-info: #94A3B8;

  --el-border-radius-base: var(--radius-md);
  --el-border-radius-small: var(--radius-sm);
  --el-border-radius-round: var(--radius-full);

  --el-border-color: var(--border-default);
  --el-border-color-light: var(--border-light);
  --el-border-color-lighter: var(--border-light);

  --el-bg-color: var(--bg-card);
  --el-bg-color-page: var(--bg-page);
  --el-bg-color-overlay: var(--bg-elevated);

  --el-text-color-primary: var(--text-primary);
  --el-text-color-regular: var(--text-secondary);
  --el-text-color-secondary: var(--text-tertiary);
  --el-text-color-placeholder: var(--text-tertiary);

  --el-fill-color-light: var(--bg-hover);
  --el-fill-color-lighter: var(--bg-input);
  --el-fill-color-blank: var(--bg-card);

  --el-font-size-base: var(--text-base);
  --el-font-size-small: var(--text-sm);
  --el-font-size-extra-small: var(--text-xs);

  --el-shadow: var(--shadow-sm);
  --el-shadow-light: var(--shadow-xs);
  --el-shadow-dark: var(--shadow-md);

  /* Menu */
  --el-menu-bg-color: transparent;
  --el-menu-hover-bg-color: var(--sidebar-hover);
  --el-menu-text-color: var(--sidebar-text);
  --el-menu-active-color: var(--sidebar-text-active);
  --el-menu-item-height: 40px;

  /* Dialog */
  --el-dialog-border-radius: var(--radius-3xl);
  --el-dialog-box-shadow: var(--shadow-modal);

  /* Card */
  --el-card-border-radius: var(--radius-lg);

  /* Tag */
  --el-tag-border-radius: var(--radius-full);
}

/* --- Card Component Style v5.0 --- */
.xyc-card {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}
.xyc-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-hover);
}
.xyc-card--interactive:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  border-color: var(--color-brand-300);
}

.xyc-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border-light);
}
.xyc-card__title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
}
.xyc-card__body {
  padding: var(--space-6);
}

/* --- Page Header v5.0 --- */
.xyc-page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}
.xyc-page-header__title {
  font-family: var(--font-display);
  font-size: var(--text-display);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
}
.xyc-page-header__subtitle {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-top: var(--space-1);
}
.xyc-page-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* --- Stat Card v5.0 --- */
.xyc-stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-6);
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
  transition: all var(--transition-fast);
}
.xyc-stat:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.xyc-stat__label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: 500;
}
.xyc-stat__value {
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum';
}
.xyc-stat__trend {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
}
.xyc-stat__trend--up { color: var(--color-success); }
.xyc-stat__trend--down { color: var(--color-danger); }
.xyc-stat__trend--flat { color: var(--text-tertiary); }

/* --- Status Pill --- */
.xyc-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  line-height: 20px;
  white-space: nowrap;
}
.xyc-pill::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}
.xyc-pill--success { background: var(--color-success-light); color: #065F46; }
.xyc-pill--success::before { background: var(--color-success); }
.xyc-pill--warning { background: var(--color-warning-light); color: #92400E; }
.xyc-pill--warning::before { background: var(--color-warning); }
.xyc-pill--danger { background: var(--color-danger-light); color: #991B1B; }
.xyc-pill--danger::before { background: var(--color-danger); }
.xyc-pill--info { background: var(--color-info-light); color: #1E40AF; }
.xyc-pill--info::before { background: var(--color-info); }
.xyc-pill--default { background: var(--color-slate-100); color: var(--text-secondary); }
.xyc-pill--default::before { background: var(--color-slate-400); }

/* --- Table Enhancement v5.0 --- */
.xyc-table {
  --el-table-border-color: var(--border-light);
  --el-table-header-bg-color: var(--color-slate-50);
  --el-table-row-hover-bg-color: var(--color-slate-50);
  --el-table-header-text-color: var(--text-secondary);
}
.xyc-table :deep(.el-table__header th) {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary) !important;
}
.xyc-table :deep(.el-table__body td) {
  font-size: var(--text-sm);
  color: var(--text-primary);
}

/* --- Skeleton Loading --- */
.xyc-skeleton {
  background: linear-gradient(90deg, var(--color-slate-100) 25%, var(--color-slate-200) 50%, var(--color-slate-100) 75%);
  background-size: 200% 100%;
  animation: xyc-shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}
@keyframes xyc-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* --- Empty State v5.0 --- */
.xyc-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-12) var(--space-6);
  text-align: center;
}
.xyc-empty__icon {
  font-size: 48px;
  color: var(--color-slate-300);
  margin-bottom: var(--space-4);
}
.xyc-empty__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}
.xyc-empty__desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  max-width: 400px;
  margin-bottom: var(--space-6);
}

/* --- Scrollbar v5.0 --- */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--color-slate-300);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-slate-400);
}

/* --- Selection --- */
::selection {
  background: var(--color-brand-100);
  color: var(--color-brand-700);
}

/* --- Button Polish v5.0 --- */
.el-button {
  font-weight: 500;
  transition: all var(--transition-fast);
}
.el-button--primary {
  background: var(--color-brand);
  border-color: var(--color-brand);
}
.el-button--primary:hover {
  background: var(--color-brand-600);
  border-color: var(--color-brand-600);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(59, 125, 255, 0.35);
}
.el-button--primary:active {
  transform: translateY(0);
  box-shadow: none;
}

/* --- Input Polish v5.0 --- */
.el-input__wrapper,
.el-textarea__inner {
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.el-input__wrapper:focus-within,
.el-textarea__inner:focus {
  box-shadow: 0 0 0 3px rgba(59, 125, 255, 0.12);
}

/* --- Dialog Overlay --- */
.el-overlay {
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

/* --- Global Image Rendering --- */
img, svg {
  image-rendering: auto;
}

/* --- Focus Visible --- */
:focus-visible {
  outline: 2px solid var(--color-brand);
  outline-offset: 2px;
}

/* --- Number Rendering --- */
.tabular-nums {
  font-variant-numeric: tabular-nums;
}

/* --- Display Font Utility --- */
.font-display {
  font-family: var(--font-display) !important;
}
.font-mono {
  font-family: var(--font-mono) !important;
}

/* --- Metric Value (大数字) --- */
.metric-value {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
  font-feature-settings: 'tnum';
}