:root {
  --bg: #f7f1e8;
  --paper: rgba(255, 250, 243, 0.92);
  --paper-strong: #fff7ee;
  --ink: #14213d;
  --muted: #6f655d;
  --line: rgba(20, 33, 61, 0.12);
  --line-strong: rgba(20, 33, 61, 0.24);
  --accent: #de6b48;
  --accent-soft: rgba(222, 107, 72, 0.14);
  --accent-alt: #207178;
  --accent-alt-soft: rgba(32, 113, 120, 0.14);
  --warning: #a04e1a;
  --shadow: 0 26px 50px rgba(20, 33, 61, 0.1);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(222, 107, 72, 0.2), transparent 30%),
    radial-gradient(circle at top right, rgba(32, 113, 120, 0.16), transparent 28%),
    linear-gradient(180deg, #fef9f3 0%, var(--bg) 100%);
}

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

button {
  cursor: pointer;
}

.page-shell {
  width: min(100% - 28px, 1560px);
  margin: 0 auto;
  padding: 28px 0 32px;
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-start;
  padding: 30px 34px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(255, 247, 238, 0.94), rgba(245, 238, 224, 0.86));
  border: 1px solid rgba(20, 33, 61, 0.08);
  box-shadow: var(--shadow);
}

.eyebrow,
.panel-kicker,
.micro-copy,
.node-id,
.node-type-badge,
.node-field label,
.node-toggle span,
.form-label,
.stack-note {
  color: var(--muted);
}

.eyebrow,
.panel-kicker,
.micro-copy,
.node-id,
.node-type-badge,
.node-field label,
.node-toggle span,
.form-label {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.7rem;
}

.hero h1,
.canvas-header h2 {
  margin: 0;
  font-size: clamp(2.2rem, 3vw, 3.4rem);
  line-height: 0.95;
}

.hero-copy {
  margin: 16px 0 0;
  max-width: 720px;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.6;
}

.hero-actions,
.canvas-toolbar,
.config-actions,
.inline-actions,
.card-toolbar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.ghost-button,
.stacked-actions button,
.mini-button,
.tool-button,
.node-grip,
.node-copy,
.node-delete,
.endpoint-delete,
.model-delete,
.subtle-button {
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
  border-radius: 999px;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.ghost-button,
.stacked-actions button,
.toolbar-button,
.subtle-button {
  padding: 12px 16px;
}

.ghost-button {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.ghost-button:hover,
.stacked-actions button:hover,
.mini-button:hover,
.tool-button:hover,
.node-grip:hover,
.node-copy:hover,
.node-delete:hover,
.endpoint-delete:hover,
.model-delete:hover,
.subtle-button:hover {
  transform: translateY(-1px);
  border-color: rgba(32, 113, 120, 0.45);
  background: rgba(255, 255, 255, 0.96);
}

.workspace {
  position: relative;
  margin-top: 22px;
  min-height: calc(100vh - 220px);
}

.panel,
.canvas-panel,
.config-panel {
  border-radius: var(--radius-lg);
  background: var(--paper);
  border: 1px solid rgba(20, 33, 61, 0.08);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.panel {
  padding: 22px;
}

.panel-left {
  position: absolute;
  top: 18px;
  left: 18px;
  z-index: 30;
  width: min(340px, calc(100vw - 64px));
  max-height: calc(100vh - 260px);
  overflow: auto;
  transition: transform 220ms ease, opacity 220ms ease;
}

.panel-left.is-collapsed {
  transform: translateX(calc(-100% - 24px));
  opacity: 0;
  pointer-events: none;
}

.panel-title {
  margin: 8px 0 0;
  font-size: 1.1rem;
}

.panel-headline,
.canvas-header,
.node-toolbar,
.config-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.panel-headline-tight {
  align-items: center;
}

.panel-block + .panel-block {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.field-group,
.node-field,
.config-card {
  display: grid;
  gap: 6px;
}

.field-group input,
.field-group textarea,
.field-group select,
.node-field input,
.node-field textarea,
.node-field select,
.config-card input,
.config-card select,
.config-card textarea {
  width: 100%;
  padding: 11px 12px;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.84);
  color: var(--ink);
}

.field-group textarea,
.node-field textarea,
.config-card textarea {
  min-height: 90px;
  resize: vertical;
}

.workflow-node textarea[name="prompt"] {
  min-height: 220px;
}

.workflow-node textarea[name="systemPrompt"] {
  min-height: 140px;
}

.workflow-node textarea[name="rawOutput"] {
  min-height: 160px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.84rem;
  line-height: 1.55;
}

.pretty-output {
  margin: 0;
  min-height: 120px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.76);
  white-space: pre-wrap;
  color: var(--ink);
  line-height: 1.6;
}

.debug-toolbar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.run-status {
  font-size: 0.84rem;
  color: var(--muted);
}

.endpoint-test-status {
  font-size: 0.84rem;
  color: var(--muted);
  align-self: center;
}

.compact-field input {
  min-height: 46px;
}

.stack-note {
  margin: 8px 0 0;
  font-size: 0.92rem;
  line-height: 1.55;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.tool-button {
  text-align: left;
  border-radius: 18px;
  padding: 14px;
}

.tool-button strong,
.tool-button span {
  display: block;
}

.tool-button span {
  color: var(--muted);
  margin-top: 6px;
  font-size: 0.9rem;
}

.tip-list {
  margin: 12px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.6;
}

.stacked-actions {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.zoom-controls {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.72);
}

.zoom-label,
.zoom-value {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--muted);
}

.zoom-slider {
  width: 120px;
}

.canvas-panel {
  padding: 20px;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.canvas-header {
  flex-wrap: wrap;
}

.canvas-header h2 {
  font-size: 1.5rem;
  margin-top: 8px;
}

.status-row {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  margin-left: auto;
}

.status-pill {
  border-radius: 999px;
  padding: 8px 12px;
  background: var(--accent-soft);
  color: var(--warning);
  font-weight: 700;
}

.status-pill.is-good {
  background: var(--accent-alt-soft);
  color: var(--accent-alt);
}

.warning-popover {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: min(420px, 72vw);
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid rgba(20, 33, 61, 0.12);
  background: rgba(255, 251, 246, 0.98);
  box-shadow: 0 20px 40px rgba(20, 33, 61, 0.16);
  text-align: left;
  z-index: 25;
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity 160ms ease, transform 160ms ease;
}

.warning-popover::before {
  content: "";
  position: absolute;
  top: -8px;
  right: 26px;
  width: 14px;
  height: 14px;
  background: rgba(255, 251, 246, 0.98);
  border-top: 1px solid rgba(20, 33, 61, 0.12);
  border-left: 1px solid rgba(20, 33, 61, 0.12);
  transform: rotate(45deg);
}

.status-row:hover .warning-popover:not(.is-hidden),
.status-row:focus-within .warning-popover:not(.is-hidden) {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.warning-popover-title {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--warning);
}

.warning-list {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--ink);
  line-height: 1.5;
}

.warning-list li + li {
  margin-top: 8px;
}

.warning-popover.is-hidden {
  display: none;
}

.canvas-viewport {
  position: relative;
  margin-top: 16px;
  min-height: 760px;
  overflow: auto;
  border-radius: 24px;
  border: 1px solid rgba(20, 33, 61, 0.08);
  background:
    linear-gradient(rgba(255, 255, 255, 0.62), rgba(255, 255, 255, 0.62)),
    linear-gradient(90deg, rgba(20, 33, 61, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(20, 33, 61, 0.05) 1px, transparent 1px);
  background-size: auto, 32px 32px, 32px 32px;
  cursor: grab;
}

.canvas-viewport.is-panning {
  cursor: grabbing;
}

.canvas-stage {
  position: relative;
  width: 2200px;
  height: 1400px;
}

.canvas-surface {
  position: relative;
  width: 2200px;
  height: 1400px;
  transform-origin: top left;
}

.connections-layer,
.nodes-layer {
  position: absolute;
  inset: 0;
}

.connections-layer {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.connection-line {
  fill: none;
  stroke: rgba(32, 113, 120, 0.9);
  stroke-width: 3;
  stroke-linecap: round;
  filter: drop-shadow(0 0 6px rgba(32, 113, 120, 0.16));
}

.connection-line.draft {
  stroke: rgba(222, 107, 72, 0.85);
  stroke-dasharray: 8 8;
}

.workflow-node {
  position: absolute;
  display: grid;
  grid-template-columns: 18px 1fr 18px;
  align-items: stretch;
  gap: 10px;
  width: 360px;
  padding: 0 10px;
  border: 1px solid rgba(20, 33, 61, 0.12);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 250, 245, 0.98), rgba(250, 244, 235, 0.96));
  box-shadow: 0 18px 35px rgba(20, 33, 61, 0.08);
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.workflow-node:hover {
  transform: translateY(-2px);
}

.workflow-node.is-selected {
  border-color: rgba(222, 107, 72, 0.7);
  box-shadow: 0 20px 44px rgba(222, 107, 72, 0.18);
}

.workflow-node[data-type="input"] {
  width: 390px;
  background: linear-gradient(180deg, rgba(255, 248, 235, 0.98), rgba(255, 240, 220, 0.96));
}

.workflow-node[data-type="step"] {
  width: 450px;
  background: linear-gradient(180deg, rgba(237, 250, 247, 0.98), rgba(227, 244, 242, 0.96));
}

.workflow-node[data-type="output"] {
  width: 300px;
  background: linear-gradient(180deg, rgba(247, 243, 255, 0.98), rgba(236, 229, 250, 0.96));
}

.node-shell {
  padding: 14px 0 14px;
  display: grid;
  gap: 12px;
}

.node-meta {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.node-type-badge {
  color: var(--accent-alt);
  font-weight: 700;
}

.node-title-input {
  font-size: 1rem;
  font-weight: 700;
  min-height: 44px;
}

.node-form {
  display: grid;
  gap: 10px;
}

.node-row,
.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.node-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.68);
}

.node-toggle input {
  width: 18px;
  height: 18px;
  margin: 0;
}

.recursive-fields {
  display: none;
  gap: 10px;
}

.debug-fields {
  display: none;
  gap: 10px;
}

.workflow-node[data-recursive="true"] .recursive-fields {
  display: grid;
}

.workflow-node[data-debug="true"] .debug-fields {
  display: grid;
}

.node-handle {
  align-self: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid rgba(20, 33, 61, 0.24);
  background: #fffdf9;
  padding: 0;
  flex: none;
}

.node-handle:hover,
.node-handle.is-active {
  border-color: var(--accent);
  transform: scale(1.08);
}

.config-overlay {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(20, 33, 61, 0.28);
  backdrop-filter: blur(6px);
}

.config-overlay.is-hidden {
  display: none;
}

.config-panel {
  width: min(1180px, 100%);
  max-height: calc(100vh - 48px);
  overflow: auto;
  padding: 26px;
}

.endpoint-list,
.model-preset-list {
  display: grid;
  gap: 14px;
}

.endpoint-list {
  margin-top: 18px;
}

.config-card {
  padding: 16px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.58);
}

.endpoint-card {
  gap: 14px;
}

.endpoint-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
}

.endpoint-title,
.model-title {
  margin: 0;
  font-size: 1rem;
}

.model-preset-card {
  gap: 10px;
  background: rgba(250, 248, 244, 0.84);
}

.empty-state {
  padding: 20px;
  border-radius: 18px;
  border: 1px dashed var(--line-strong);
  color: var(--muted);
  text-align: center;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 920px) {
  .page-shell {
    width: min(100% - 20px, 1560px);
    padding-top: 18px;
  }

  .hero {
    display: grid;
    padding: 22px;
  }

  .panel-left {
    width: min(320px, calc(100vw - 28px));
    top: 12px;
    left: 12px;
    max-height: calc(100vh - 180px);
  }

  .canvas-viewport {
    min-height: 580px;
  }

  .canvas-surface {
    width: 1800px;
    height: 1400px;
  }

  .canvas-stage {
    width: 1800px;
    height: 1400px;
  }

  .workflow-node[data-type="step"] {
    width: 380px;
  }

  .workflow-node[data-type="input"] {
    width: 340px;
  }

  .form-row,
  .node-row {
    grid-template-columns: 1fr;
  }

  .config-panel {
    padding: 18px;
  }
}