:root {
  color-scheme: light;
  --ds-font-sans: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --ds-font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --ds-text-xs: .75rem;
  --ds-text-sm: .875rem;
  --ds-text-md: 1rem;
  --ds-text-lg: 1.125rem;
  --ds-text-xl: 1.5rem;
  --ds-text-2xl: clamp(1.75rem, 2.4vw, 2.25rem);
  --ds-leading-tight: 1.2;
  --ds-leading-normal: 1.5;
  --ds-space-1: .25rem;
  --ds-space-2: .5rem;
  --ds-space-3: .75rem;
  --ds-space-4: 1rem;
  --ds-space-5: 1.25rem;
  --ds-space-6: 1.5rem;
  --ds-space-8: 2rem;
  --ds-space-10: 2.5rem;
  --ds-radius-sm: .5rem;
  --ds-radius-md: .75rem;
  --ds-radius-lg: 1rem;
  --ds-radius-xl: 1.25rem;
  --ds-radius-pill: 999px;
  --ds-bg: #f7f9f9;
  --ds-surface: #ffffff;
  --ds-surface-subtle: #f2f5f5;
  --ds-surface-raised: #ffffff;
  --ds-text: #17262d;
  --ds-text-muted: #5b6c72;
  --ds-border: #dfe6e8;
  --ds-border-strong: #c6d1d4;
  --ds-accent: var(--tenant-accent, #087f7d);
  --ds-accent-hover: #076c6b;
  --ds-accent-soft: color-mix(in srgb, var(--ds-accent) 11%, white);
  --ds-focus: #197f82;
  --ds-success: #147a55;
  --ds-success-soft: #eaf7f1;
  --ds-warning: #9b6716;
  --ds-warning-soft: #fff6df;
  --ds-danger: #b53e45;
  --ds-danger-soft: #fff0f1;
  --ds-info: #316a9a;
  --ds-info-soft: #edf5fc;
  --ds-shadow-sm: 0 1px 2px rgb(16 36 44 / 6%);
  --ds-shadow-md: 0 10px 28px rgb(16 36 44 / 10%);
  --ds-shadow-lg: 0 28px 80px rgb(16 36 44 / 18%);
  --ds-control-height: 42px;
  --ds-table-row-height: 52px;
  --shell-ink: var(--ds-text);
  --shell-muted: var(--ds-text-muted);
  --shell-line: var(--ds-border);
  --shell-bg: var(--ds-bg);
  --shell-teal: var(--ds-accent);
  --shell-teal-soft: var(--ds-accent-soft);
  --wp-line: var(--ds-border);
}

html[data-density="compact"] {
  --ds-control-height: 36px;
  --ds-table-row-height: 42px;
  --ds-space-5: 1rem;
  --ds-space-6: 1.125rem;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --ds-bg: #111719;
  --ds-surface: #182124;
  --ds-surface-subtle: #202b2e;
  --ds-surface-raised: #1d282b;
  --ds-text: #edf4f4;
  --ds-text-muted: #9dafb3;
  --ds-border: #304044;
  --ds-border-strong: #475b60;
  --ds-accent-hover: #56bab7;
  --ds-accent-soft: color-mix(in srgb, var(--ds-accent) 24%, #182124);
  --ds-focus: #66cfca;
  --ds-success: #63d39e;
  --ds-success-soft: #18372c;
  --ds-warning: #f0be63;
  --ds-warning-soft: #3b301d;
  --ds-danger: #ff8d94;
  --ds-danger-soft: #402328;
  --ds-info: #8fc7f4;
  --ds-info-soft: #203447;
  --ds-shadow-sm: 0 1px 2px rgb(0 0 0 / 20%);
  --ds-shadow-md: 0 12px 32px rgb(0 0 0 / 28%);
  --ds-shadow-lg: 0 30px 90px rgb(0 0 0 / 42%);
}

*, *::before, *::after { box-sizing: border-box; }
html { font-family: var(--ds-font-sans); text-rendering: optimizeLegibility; }
body { color: var(--ds-text); background: var(--ds-bg); }
button, input, select, textarea { font: inherit; }
button, a, input, select, textarea { -webkit-tap-highlight-color: transparent; }

:where(button, a, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: 3px solid var(--ds-focus) !important;
  outline-offset: 3px !important;
}

:where(input, select, textarea):not([type="checkbox"]):not([type="radio"]) {
  min-height: var(--ds-control-height);
  border-color: var(--ds-border-strong);
  border-radius: var(--ds-radius-sm);
  color: var(--ds-text);
  background: var(--ds-surface);
}

:where(input, select, textarea)::placeholder { color: color-mix(in srgb, var(--ds-text-muted) 78%, transparent); }
:where(input, select, textarea):disabled { cursor: not-allowed; opacity: .62; background: var(--ds-surface-subtle); }
:where(button, [role="button"]):disabled { cursor: not-allowed; opacity: .55; }

.ds-button,
.wp-primary,
.wp-secondary,
.wp-danger,
.workspace-page button,
.wp-modal button {
  min-height: var(--ds-control-height);
  border-radius: var(--ds-radius-sm);
  font-weight: 700;
}

.wp-primary, .ds-button--primary { border-color: var(--ds-accent); color: #fff; background: var(--ds-accent); }
.wp-primary:hover, .ds-button--primary:hover { background: var(--ds-accent-hover); }
.wp-secondary, .ds-button--secondary { border: 1px solid var(--ds-border-strong); color: var(--ds-text); background: var(--ds-surface); }
.wp-danger, .ds-button--danger, button.danger { border-color: var(--ds-danger); color: #fff; background: var(--ds-danger); }
.ds-button--ghost { border-color: transparent; color: var(--ds-text); background: transparent; }

.card,
.wp-card,
.metric-card,
.table-panel,
.settings-card,
.campaign-card,
.provider-card,
.agent-config-main,
.agent-config-grid article,
.usage-metrics article,
.daily-usage,
.routing-policy,
.routing-summary article {
  border-color: var(--ds-border);
  background: var(--ds-surface);
  box-shadow: var(--ds-shadow-sm);
}

.wp-table, .tenant-table { width: 100%; border-collapse: collapse; }
.wp-table caption, .tenant-table caption { color: var(--ds-text); }
.wp-table th, .tenant-table th { color: var(--ds-text-muted); background: var(--ds-surface-subtle); }
.wp-table tr, .tenant-table tr { min-height: var(--ds-table-row-height); }
.wp-table td, .tenant-table td { height: var(--ds-table-row-height); border-color: var(--ds-border); }
.wp-table tbody tr:hover, .tenant-table tbody tr:hover { background: var(--ds-accent-soft); }

.wp-badge,
.badge,
.ds-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--ds-space-1);
  width: max-content;
  min-height: 24px;
  padding: 3px 9px;
  border-radius: var(--ds-radius-pill);
  color: var(--ds-text-muted);
  background: var(--ds-surface-subtle);
  font-size: var(--ds-text-xs);
  font-weight: 750;
}
.ds-badge--success, .wp-badge.ready, .badge.active { color: var(--ds-success); background: var(--ds-success-soft); }
.ds-badge--warning, .wp-badge.pending { color: var(--ds-warning); background: var(--ds-warning-soft); }
.ds-badge--danger, .wp-badge.failed { color: var(--ds-danger); background: var(--ds-danger-soft); }
.ds-badge--info { color: var(--ds-info); background: var(--ds-info-soft); }

.ds-alert,
.integration-state,
.integration-recovery,
.knowledge-search-error,
.form-status:not(:empty) {
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius-md);
  padding: var(--ds-space-3) var(--ds-space-4);
  line-height: var(--ds-leading-normal);
}
.ds-alert--success, .integration-state { border-color: color-mix(in srgb, var(--ds-success) 25%, var(--ds-border)); color: var(--ds-success); background: var(--ds-success-soft); }
.ds-alert--warning { border-color: color-mix(in srgb, var(--ds-warning) 25%, var(--ds-border)); color: var(--ds-warning); background: var(--ds-warning-soft); }
.ds-alert--danger, .integration-recovery, .knowledge-search-error { border-color: color-mix(in srgb, var(--ds-danger) 25%, var(--ds-border)); color: var(--ds-danger); background: var(--ds-danger-soft); }

.shell-toast,
.ds-toast {
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius-md);
  color: var(--ds-text);
  background: var(--ds-surface-raised);
  box-shadow: var(--ds-shadow-md);
}

dialog,
.wp-modal,
.command-palette,
.session-manager,
.help-guides {
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius-xl);
  color: var(--ds-text);
  background: var(--ds-surface-raised);
  box-shadow: var(--ds-shadow-lg);
}
dialog::backdrop { background: rgb(10 24 30 / 62%); backdrop-filter: blur(5px); }
.ds-confirm { width: min(460px, calc(100vw - 32px)); padding: 0; }
.ds-confirm form { display: grid; grid-template-columns: 42px 1fr; gap: var(--ds-space-4); padding: var(--ds-space-6); }
.ds-confirm-mark { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; color: var(--ds-danger); background: var(--ds-danger-soft); font-weight: 800; font-size: 1.2rem; }
.ds-confirm h2 { margin: 0 0 var(--ds-space-2); font-size: var(--ds-text-xl); }
.ds-confirm p { margin: 0; color: var(--ds-text-muted); line-height: 1.55; }
.ds-confirm footer { grid-column: 1 / -1; display: flex; justify-content: flex-end; gap: var(--ds-space-3); margin-top: var(--ds-space-3); }
.ds-confirm { width: min(460px, calc(100vw - 32px)); padding: 0; }
.ds-confirm form { display: grid; grid-template-columns: 42px 1fr; gap: var(--ds-space-4); padding: var(--ds-space-6); }
.ds-confirm-mark { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; color: var(--ds-danger); background: var(--ds-danger-soft); font-weight: 800; font-size: 1.2rem; }
.ds-confirm h2 { margin: 0 0 var(--ds-space-2); font-size: var(--ds-text-xl); }
.ds-confirm p { margin: 0; color: var(--ds-text-muted); line-height: 1.55; }
.ds-confirm footer { grid-column: 1 / -1; display: flex; justify-content: flex-end; gap: var(--ds-space-3); margin-top: var(--ds-space-3); }
.ds-confirm { width: min(460px, calc(100vw - 32px)); padding: 0; }
.ds-confirm form { display: grid; grid-template-columns: 42px 1fr; gap: var(--ds-space-4); padding: var(--ds-space-6); }
.ds-confirm-mark { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; color: var(--ds-danger); background: var(--ds-danger-soft); font-weight: 800; font-size: 1.2rem; }
.ds-confirm h2 { margin: 0 0 var(--ds-space-2); font-size: var(--ds-text-xl); }
.ds-confirm p { margin: 0; color: var(--ds-text-muted); line-height: 1.55; }
.ds-confirm footer { grid-column: 1 / -1; display: flex; justify-content: flex-end; gap: var(--ds-space-3); margin-top: var(--ds-space-3); }

.ds-skeleton {
  display: block;
  min-height: 14px;
  border-radius: var(--ds-radius-sm);
  background: linear-gradient(90deg, var(--ds-surface-subtle) 20%, color-mix(in srgb, var(--ds-surface-subtle) 45%, var(--ds-surface)) 38%, var(--ds-surface-subtle) 56%);
  background-size: 220% 100%;
  animation: ds-shimmer 1.35s ease-in-out infinite;
}
.ds-skeleton--title { width: min(320px, 70%); min-height: 24px; }
.ds-skeleton--row { width: 100%; min-height: var(--ds-table-row-height); }
@keyframes ds-shimmer { to { background-position: -120% 0; } }

.ds-empty,
.wp-empty {
  display: grid;
  place-items: center;
  align-content: center;
  min-height: 280px;
  padding: clamp(var(--ds-space-8), 6vw, 5rem);
  color: var(--ds-text-muted);
  text-align: center;
}
.wp-empty > b svg { width: 36px; height: 36px; }
.ds-empty h2, .wp-empty h2 { color: var(--ds-text); font-size: var(--ds-text-xl); }

.ds-truncate,
[data-truncate] {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ds-tooltip {
  position: fixed;
  z-index: 1000;
  max-width: min(360px, calc(100vw - 24px));
  padding: 7px 9px;
  border-radius: 7px;
  color: #fff;
  background: #17262d;
  box-shadow: var(--ds-shadow-md);
  font-size: var(--ds-text-xs);
  line-height: 1.4;
  pointer-events: none;
}

.appearance-preferences {
  display: grid;
  gap: var(--ds-space-2);
  padding: var(--ds-space-3);
  border-top: 1px solid var(--ds-border);
}
.appearance-preferences > span { color: var(--ds-text-muted); font-size: .68rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.appearance-preferences > div { display: grid; grid-template-columns: 1fr 1fr; gap: var(--ds-space-2); }
.appearance-preferences button { justify-content: center; border: 1px solid var(--ds-border); background: var(--ds-surface-subtle); }
.appearance-preferences button[aria-pressed="true"] { border-color: var(--ds-accent); color: var(--ds-accent); background: var(--ds-accent-soft); }

.flow-node[role="button"]:focus-visible { z-index: 3; box-shadow: 0 0 0 4px color-mix(in srgb, var(--ds-focus) 28%, transparent), var(--ds-shadow-md); }
.wp-breadcrumb { display: flex; align-items: center; gap: var(--ds-space-2); margin: 0 0 var(--ds-space-2); color: var(--ds-text-muted); font-size: var(--ds-text-xs); font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }
.wp-breadcrumb a { color: var(--ds-accent); text-decoration: none; }
.wp-breadcrumb a:hover { text-decoration: underline; }

@media (pointer: coarse) {
  :where(button, a, input, select, summary, [role="button"]) { min-height: 44px; }
  .port { width: 16px; height: 16px; }
}

html[data-theme="dark"] :where(.sidebar, .app-topbar, .shell-popover, .workspace-page, .node-palette, .node-inspector, .studio-head) { color: var(--ds-text); background-color: var(--ds-surface); }
html[data-theme="dark"] :where(.workspace-page p, .workspace-page small, .workspace-page span, .node-inspector p) { border-color: var(--ds-border); }
html[data-theme="dark"] :where(.workflow-canvas, .workflow-studio) { background-color: var(--ds-bg); }
html[data-theme="dark"] img { filter: brightness(.92) contrast(1.04); }

@media (max-width: 1280px) {
  .workspace-page { padding-inline: clamp(16px, 2.4vw, 28px); }
  .metric-grid.four, .home-metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  :root { --ds-control-height: 44px; }
  .workspace-page { padding-inline: 16px; }
  .wp-head h1 { font-size: var(--ds-text-2xl); }
  .wp-modal, dialog { max-width: calc(100vw - 24px); max-height: calc(100dvh - 24px); }
  .metric-grid.four, .home-metric-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}

@media (forced-colors: active) {
  .wp-primary, .ds-button--primary, .wp-danger, .ds-button--danger { border: 1px solid ButtonText; }
  .wp-badge, .badge, .ds-badge { border: 1px solid CanvasText; }
}