:root {
  --color-bg-1: #ffffff;
  --color-bg-2: #f7f8fa;
  --color-bg-3: #f2f3f5;
  --color-text-1: #1d2129;
  --color-text-2: #4e5969;
  --color-text-3: #86909c;
  --color-border: #e5e6eb;
  --color-border-strong: #c9cdd4;
  --color-primary: #165dff;
  --color-primary-hover: #0e42d2;
  --color-primary-light: #e8f3ff;
  --color-success: #00b42a;
  --color-success-light: #e8ffea;
  --color-warning: #ff7d00;
  --color-warning-light: #fff7e8;
  --color-danger: #f53f3f;
  --radius: 4px;
  --font: Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color-scheme: light;
}

html.dark {
  --color-bg-1: #17171a;
  --color-bg-2: #232324;
  --color-bg-3: #2a2a2b;
  --color-text-1: #f2f3f5;
  --color-text-2: #c9cdd4;
  --color-text-3: #86909c;
  --color-border: #3f3f41;
  --color-border-strong: #5a5a5d;
  --color-primary: #4080ff;
  --color-primary-hover: #6aa1ff;
  --color-primary-light: rgba(64, 128, 255, 0.16);
  --color-success: #23c343;
  --color-success-light: rgba(35, 195, 67, 0.12);
  --color-warning-light: rgba(255, 125, 0, 0.13);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background: var(--color-bg-2);
  color: var(--color-text-1);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.55;
}

body::before {
  display: none;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration: none;
}

h1,
h2,
h3,
p {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: 20px;
}

h2 {
  font-size: 16px;
}

h3 {
  font-size: 14px;
}

.page-shell {
  width: min(1800px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  background: var(--color-bg-2);
}

.sidebar {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 16px;
  border-right: 1px solid var(--color-border);
  background: var(--color-bg-1);
}

.main-stage {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
}

.panel-card,
.hero-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-1);
  box-shadow: none;
  backdrop-filter: none;
}

.panel-card {
  padding: 16px;
}

.brand-card {
  position: relative;
  overflow: visible;
  padding: 0 0 16px;
  border: 0;
  border-bottom: 1px solid var(--color-border);
  border-radius: 0;
}

.brand-card::before {
  content: "";
  width: 28px;
  height: 28px;
  display: block;
  margin-bottom: 12px;
  background: url("/brand/tidba-mark.svg") center / contain no-repeat;
}

.brand-card::after {
  display: none;
}

.brand-card .lede {
  margin-top: 8px;
  color: var(--color-text-3);
  font-size: 12px;
}

.history-card {
  flex: 1;
  min-height: 0;
  margin-top: 16px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.history-card .section-heading {
  margin-bottom: 12px;
}

.history-list {
  max-height: calc(100vh - 260px);
  display: flex;
  flex-direction: column;
  gap: 6px;
  overflow-y: auto;
}

.history-item {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: var(--color-bg-2);
  color: var(--color-text-1);
  text-align: left;
}

.history-item:hover {
  border-color: var(--color-border-strong);
  background: var(--color-bg-3);
}

.history-item-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  color: var(--color-text-3);
  font-size: 12px;
}

.history-item-prompt {
  display: -webkit-box;
  overflow: hidden;
  line-height: 1.5;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.history-item-meta {
  color: var(--color-text-3);
  font-size: 12px;
}

.hero-card {
  display: none;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--color-text-3);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
}

.lede,
.helper-text,
.dropzone-subtitle,
.empty-placeholder {
  color: var(--color-text-3);
}

.helper-text {
  margin: 6px 0 0;
  font-size: 12px;
  line-height: 1.5;
}

.section-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.workflow-ribbon {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  padding: 0;
  overflow: hidden;
}

.flow-node {
  min-width: 0;
  min-height: 54px;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  border-right: 1px solid var(--color-border);
  background: var(--color-bg-1);
}

.flow-node:last-child {
  border-right: 0;
}

.flow-index {
  width: 24px;
  height: 24px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-bg-3);
  color: var(--color-text-3);
  font-size: 11px;
  font-weight: 500;
}

.flow-node strong {
  display: block;
  font-size: 13px;
  font-weight: 500;
}

.flow-node p {
  overflow: hidden;
  margin-top: 1px;
  color: var(--color-text-3);
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.flow-node.is-active {
  background: var(--color-primary-light);
}

.flow-node.is-active .flow-index,
.flow-node.is-complete .flow-index {
  background: var(--color-primary);
  color: #ffffff;
}

.flow-node.is-complete strong {
  color: var(--color-primary);
}

.connection-card {
  display: grid;
  grid-template-columns: 180px minmax(360px, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 12px 16px;
}

.connection-copy h2 {
  font-size: 15px;
}

.connection-copy .helper-text {
  max-width: 180px;
}

.sub2api-card {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto auto;
  gap: 8px;
  align-items: end;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
}

.sub2api-card .field {
  margin: 0;
}

.sub2api-card #sub2apiKeyStatus {
  grid-column: 1 / -1;
  margin: 0;
}

.inline-link {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  color: var(--color-primary);
  font-size: 13px;
  white-space: nowrap;
}

.inline-link:hover {
  color: var(--color-primary-hover);
}

.advanced-settings {
  margin: 0;
}

.advanced-settings summary {
  color: var(--color-text-2);
  cursor: pointer;
  font-size: 13px;
  user-select: none;
  white-space: nowrap;
}

.connection-card .advanced-settings[open] {
  grid-column: 1 / -1;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

.advanced-settings-body {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(260px, 1fr) minmax(260px, 1fr) auto;
  gap: 12px;
  margin-top: 12px;
  align-items: end;
}

.advanced-settings-body #settingsHint {
  grid-column: 1 / -1;
}

.workspace-grid {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(380px, 440px) minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.command-deck {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mode-switch {
  min-height: 54px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
}

.mode-switch-copy h2 {
  font-size: 15px;
}

.mode-switch-tabs,
.intent-rail {
  display: inline-flex;
  padding: 2px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-3);
}

.mode-tab,
.intent-tab {
  min-height: 30px;
  padding: 0 12px;
  border: 0;
  border-radius: 2px;
  background: transparent;
  color: var(--color-text-2);
  font-weight: 500;
}

.mode-tab.active,
.intent-tab.active {
  background: var(--color-bg-1);
  color: var(--color-primary);
}

.workspace-panel {
  min-width: 0;
}

.panel-chip {
  min-height: 24px;
  display: inline-flex;
  align-items: center;
  padding: 0 8px;
  border-radius: 2px;
  background: var(--color-bg-3);
  color: var(--color-text-2);
  font-size: 12px;
}

.intent-rail {
  margin-bottom: 10px;
}

.field {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.field > span,
.field-head > span {
  color: var(--color-text-2);
  font-size: 13px;
  font-weight: 500;
}

.field-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.field-meter {
  color: var(--color-text-3);
  font-size: 12px;
  font-weight: 400;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  outline: none;
  background: var(--color-bg-1);
  color: var(--color-text-1);
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

input,
select {
  height: 36px;
  padding: 0 10px;
}

textarea {
  min-height: 132px;
  padding: 10px;
  resize: vertical;
  line-height: 1.6;
}

input:hover,
textarea:hover,
select:hover {
  border-color: var(--color-border-strong);
}

input:focus,
textarea:focus,
select:focus,
.dropzone:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px var(--color-primary-light);
}

.secret-field {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.tiny-button,
.ghost-button,
.primary-button {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 14px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 500;
  white-space: nowrap;
}

.tiny-button,
.ghost-button {
  border-color: var(--color-border);
  background: var(--color-bg-1);
  color: var(--color-text-1);
}

.tiny-button:hover,
.ghost-button:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.primary-button {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #ffffff;
}

.primary-button:hover {
  border-color: var(--color-primary-hover);
  background: var(--color-primary-hover);
}

.disabled-link,
button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.action-row-strong {
  margin-top: 4px;
}

.action-row-spread {
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

.chip-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 14px;
}

.prompt-chip {
  min-height: 28px;
  padding: 0 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-1);
  color: var(--color-text-2);
  font-size: 12px;
}

.prompt-chip:hover {
  border-color: #94bfff;
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.stack-grid,
.two-column-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.size-stack {
  display: grid;
  gap: 8px;
}

.size-manual-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 8px;
  align-items: center;
}

.size-divider {
  color: var(--color-text-3);
}

.variant-source-card,
.inline-hint {
  margin: 0 0 12px;
  padding: 10px 12px;
  border: 1px solid #94bfff;
  border-radius: var(--radius);
  background: var(--color-primary-light);
}

.variant-source-card {
  display: grid;
  gap: 4px;
}

.variant-source-label {
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 500;
}

.inline-hint {
  color: var(--color-text-2);
  font-size: 12px;
}

.dropzone {
  margin-bottom: 14px;
  padding: 24px 16px;
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius);
  background: var(--color-bg-2);
  text-align: center;
  cursor: pointer;
  transition: border-color 120ms ease, background 120ms ease;
}

.dropzone.ready,
.dropzone.dragging {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.dropzone-title {
  margin-bottom: 5px;
  font-size: 14px;
  font-weight: 500;
}

.result-panel {
  min-width: 0;
  position: sticky;
  top: 16px;
}

.status-badge {
  min-height: 24px;
  display: inline-flex;
  align-items: center;
  padding: 0 8px;
  border-radius: 2px;
  font-size: 12px;
  font-weight: 500;
}

.status-badge.idle {
  background: var(--color-success-light);
  color: var(--color-success);
}

.status-badge.working {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.canvas-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-bottom: 12px;
}

.canvas-side {
  display: grid;
  grid-template-columns: minmax(220px, 0.65fr) minmax(0, 1fr);
  gap: 12px;
}

.preview-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-2);
}

.preview-card.subtle {
  opacity: 0.9;
}

.preview-label {
  min-height: 34px;
  display: flex;
  align-items: center;
  padding: 0 10px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-1);
  color: var(--color-text-2);
  font-size: 12px;
  font-weight: 500;
}

.preview-frame {
  position: relative;
  min-height: 260px;
  display: grid;
  place-items: center;
  background-color: var(--color-bg-2);
  box-shadow: inset 0 0 0 1px var(--color-bg-3);
}

.preview-frame-hero {
  min-height: clamp(380px, 48vh, 620px);
}

.preview-frame-side {
  min-height: 220px;
}

.preview-frame.preview-frame-clickable {
  cursor: zoom-in;
}

.preview-frame img {
  display: none;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.preview-frame img.visible {
  display: block;
}

.preview-hint {
  position: absolute;
  right: 8px;
  bottom: 8px;
  display: none;
  padding: 4px 8px;
  border-radius: 2px;
  background: rgba(29, 33, 41, 0.78);
  color: #ffffff;
  font-size: 12px;
}

.preview-frame.preview-frame-clickable:hover .preview-hint,
.preview-frame.preview-frame-clickable:focus .preview-hint {
  display: block;
}

.empty-placeholder {
  max-width: 300px;
  padding: 18px;
  text-align: center;
  line-height: 1.6;
}

.inspector-card {
  min-width: 0;
  padding: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-1);
}

.inspector-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 12px;
}

.inspector-item {
  min-width: 0;
  display: grid;
  gap: 4px;
  padding: 9px 0;
  border-bottom: 1px solid var(--color-border);
}

.inspector-item span {
  color: var(--color-text-3);
  font-size: 12px;
}

.inspector-item strong {
  overflow-wrap: anywhere;
  font-size: 13px;
  font-weight: 500;
  white-space: pre-wrap;
}

.result-prompt {
  line-height: 1.6;
}

.feedback-strip {
  min-height: 22px;
}

.error-text {
  min-height: 20px;
  margin: 8px 0 0;
  color: var(--color-danger);
  white-space: pre-wrap;
}

.raw-response {
  margin-top: 10px;
}

.raw-response summary {
  color: var(--color-text-2);
  cursor: pointer;
  font-size: 13px;
}

.raw-response pre {
  max-height: 260px;
  overflow: auto;
  margin: 10px 0 0;
  padding: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #1d2129;
  color: #f2f3f5;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
  line-height: 1.6;
}

.preview-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 20px;
}

.preview-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.68);
}

.preview-modal-dialog {
  position: relative;
  width: min(1240px, calc(100vw - 40px));
  max-height: calc(100vh - 40px);
  overflow: auto;
  padding: 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-1);
}

.preview-modal-header {
  min-height: 46px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}

.preview-modal-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.active-toggle {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.preview-modal-pane {
  min-height: 320px;
}

.preview-modal-single-wrap,
.preview-modal-compare-frame {
  min-height: min(72vh, 820px);
  display: grid;
  place-items: center;
  padding: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-2);
}

.preview-modal-image {
  max-width: 100%;
  max-height: min(68vh, 780px);
  object-fit: contain;
}

.preview-modal-compare-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.hidden {
  display: none !important;
}

body.modal-open {
  overflow: hidden;
}

@media (max-width: 1360px) {
  .workspace-grid {
    grid-template-columns: minmax(360px, 410px) minmax(0, 1fr);
  }

  .canvas-side {
    grid-template-columns: 1fr;
  }

  .inspector-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 1120px) {
  .page-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    order: 2;
    border-top: 1px solid var(--color-border);
    border-right: 0;
  }

  .history-list {
    max-height: 320px;
  }

  .main-stage {
    order: 1;
  }

  .workspace-grid {
    grid-template-columns: 1fr;
  }

  .result-panel {
    position: static;
  }
}

@media (max-width: 820px) {
  .connection-card {
    grid-template-columns: 1fr;
  }

  .connection-copy .helper-text {
    max-width: none;
  }

  .sub2api-card {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .sub2api-card .inline-link {
    grid-column: 1 / -1;
  }

  .advanced-settings-body,
  .workflow-ribbon {
    grid-template-columns: 1fr;
  }

  .flow-node {
    border-right: 0;
    border-bottom: 1px solid var(--color-border);
  }

  .flow-node:last-child {
    border-bottom: 0;
  }
}

@media (max-width: 640px) {
  .main-stage,
  .sidebar {
    padding: 10px;
  }

  .panel-card {
    padding: 12px;
  }

  .workflow-ribbon {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    padding: 0;
  }

  .flow-node {
    min-height: 58px;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    padding: 6px 2px;
    border-right: 1px solid var(--color-border);
    border-bottom: 0;
    text-align: center;
  }

  .flow-node:last-child {
    border-right: 0;
  }

  .flow-node p {
    display: none;
  }

  .flow-index {
    width: 22px;
    height: 22px;
  }

  .flow-node strong {
    overflow: hidden;
    width: 100%;
    font-size: 11px;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .connection-card {
    gap: 8px;
  }

  .connection-copy .eyebrow,
  .connection-copy .helper-text {
    display: none;
  }

  .connection-copy h2 {
    font-size: 14px;
  }

  .mode-switch,
  .section-heading,
  .preview-modal-header {
    align-items: stretch;
    flex-direction: column;
  }

  .mode-switch-tabs,
  .intent-rail {
    width: 100%;
  }

  .mode-tab,
  .intent-tab {
    flex: 1;
  }

  .stack-grid,
  .two-column-grid,
  .canvas-side,
  .preview-modal-compare-grid {
    grid-template-columns: 1fr;
  }

  .action-row {
    flex-direction: column;
  }

  .action-row > * {
    width: 100%;
  }

  .preview-frame-hero {
    min-height: 340px;
  }

  .preview-modal {
    padding: 8px;
  }

  .preview-modal-dialog {
    width: calc(100vw - 16px);
    max-height: calc(100vh - 16px);
  }
}