:root {
  --ink: #12282f;
  --ink-soft: #344a50;
  --muted: #566b71;
  --paper: #fbfdfd;
  --mist: #edf3f3;
  --line: #d9e4e5;
  --line-strong: #bfcfd1;
  --blue: #0878ff;
  --blue-deep: #0056c8;
  --teal: #087f72;
  --orange: #e89a12;
  --green: #009e73;
  --purple: #bb6aa8;
  --shadow: 0 24px 70px rgba(24, 54, 61, 0.09);
  --display: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --body: "Avenir Next", Avenir, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  max-width: 100%;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100svh;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background-color: #f3f8f8;
  background-image:
    url("background-network.svg?v=20260806"),
    radial-gradient(circle, rgba(8, 120, 255, 0.085) 0, rgba(8, 120, 255, 0) 69%),
    radial-gradient(circle, rgba(8, 127, 114, 0.065) 0, rgba(8, 127, 114, 0) 70%),
    linear-gradient(180deg, #fbfdfd 0%, #f6fafa 56%, #eef5f5 100%);
  background-repeat: no-repeat;
  background-position:
    center 8px,
    122% -30vw,
    -12% 12%,
    center;
  background-size:
    max(1480px, 100vw) auto,
    82vw 82vw,
    58vw 58vw,
    100% 100%;
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
}

html[data-embed="true"] {
  height: 100%;
  overflow: hidden;
}

html[data-embed="true"] body {
  height: 100%;
  min-height: 0;
  overflow: hidden;
  background: var(--paper);
}

html[data-embed="true"] .skip-link,
html[data-embed="true"] .site-header {
  display: none;
}

html[data-embed="true"] main,
html[data-embed="true"] .visual-section,
html[data-embed="true"] .lab {
  width: 100%;
  max-width: none;
  height: 100%;
  min-height: 0;
  margin: 0;
}

html[data-embed="true"] .lab {
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

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

button,
select {
  cursor: pointer;
}

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

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

button:focus-visible,
select:focus-visible,
textarea:focus-visible,
input:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(8, 120, 255, 0.28);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  transform: translateY(-150%);
  border-radius: 8px;
  color: white;
  background: var(--ink);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: relative;
  z-index: 20;
  display: block;
  width: min(1440px, calc(100% - 64px));
  min-height: 0;
  margin: 0 auto;
  padding: 24px 0 12px;
  border-bottom: 1px solid var(--line);
}

.paper-identity {
  min-width: 0;
}

.paper-identity h1 {
  max-width: 980px;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(22px, 2.05vw, 30px);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.12;
}

.paper-byline {
  display: flex;
  gap: 14px;
  align-items: center;
  margin-top: 9px;
}

.author-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  align-items: center;
  min-width: 0;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
}

.author-strip span:not(:last-child)::after {
  display: inline-block;
  width: 3px;
  height: 3px;
  margin: 0 0 2px 16px;
  border-radius: 50%;
  background: var(--line-strong);
  content: "";
}

.paper-links {
  display: inline-flex;
  gap: 14px;
  align-items: center;
  flex: 0 0 auto;
  padding-left: 14px;
  border-left: 1px solid var(--line-strong);
}

.paper-meta-link {
  display: inline-flex;
  gap: 5px;
  align-items: center;
  color: var(--blue-deep);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.03em;
}

.external-link-icon {
  width: 12px;
  height: 12px;
  overflow: visible;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.2;
  transition: transform 160ms ease;
}

.paper-meta-link:hover .external-link-icon {
  transform: translate(1px, -1px);
}

.visual-section {
  width: calc(100% - 64px);
  max-width: 1440px;
  margin: 56px auto 32px;
}

.quiet-button,
.primary-button {
  padding: 10px 15px;
  border-radius: 10px;
  font-size: 12px;
}

.quiet-button {
  border: 1px solid var(--line);
  background: white;
  font-weight: 600;
}

.quiet-button:hover {
  border-color: var(--line-strong);
  background: var(--mist);
}

.primary-button {
  border: 1px solid var(--ink);
  color: white;
  background: var(--ink);
  font-weight: 700;
}

.primary-button:hover {
  background: #1b3941;
}

dialog {
  width: min(660px, calc(100% - 32px));
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  color: var(--ink);
  background: var(--paper);
  box-shadow: 0 35px 100px rgba(14, 42, 50, 0.25);
}

dialog::backdrop {
  background: rgba(11, 34, 42, 0.42);
  backdrop-filter: blur(5px);
}

dialog form {
  padding: 26px 28px 24px;
}

.dialog-heading {
  display: flex;
  justify-content: space-between;
  align-items: start;
}

.dialog-heading h2 {
  margin: 4px 0 0;
  font-family: var(--display);
  font-size: 34px;
  font-weight: 500;
  letter-spacing: -0.042em;
}

.dialog-close {
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: white;
  font-size: 22px;
  line-height: 1;
}

.dialog-close:hover {
  border-color: var(--line-strong);
  background: var(--mist);
}

.dialog-intro {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  margin: 20px 0 18px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.dialog-help {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.dialog-help code {
  padding: 2px 5px;
  border-radius: 4px;
  color: var(--ink);
  background: var(--mist);
  font-family: var(--mono);
  font-size: 0.92em;
}

.graph-editor-link {
  display: inline-flex;
  gap: 7px;
  align-items: center;
  flex: 0 0 auto;
  padding: 5px 0;
  color: var(--blue-deep);
  font-size: 11px;
  font-weight: 750;
  transition: color 160ms ease;
}

.graph-editor-link:hover {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.graph-editor-link span:last-child {
  font-size: 13px;
}

.editor-heading {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: baseline;
  margin-bottom: 7px;
}

.edge-editor-label {
  color: var(--muted);
  display: inline;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.editor-footer > span {
  color: var(--muted);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}

#edge-editor {
  width: 100%;
  min-height: 215px;
  resize: vertical;
  padding: 16px;
  border: 1px solid var(--line-strong);
  border-radius: 11px;
  color: var(--ink);
  background: white;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  tab-size: 2;
}

#edge-editor:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(8, 120, 255, 0.15);
}

.editor-error {
  min-height: 16px;
  margin: 0;
  color: #b42318;
  font-size: 11px;
  font-weight: 650;
}

.editor-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  min-height: 28px;
  padding-top: 7px;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 9px;
  margin-top: 8px;
}

@media (max-width: 1180px) {
  .canvas-meta {
    gap: 12px;
    padding-right: 14px;
  }

  .canvas-meta strong {
    font-size: 20px;
  }

  .header-playback {
    gap: 8px;
    width: min(100%, 480px);
  }

  .transport-controls {
    grid-template-columns: 26px 26px 38px 26px 26px;
  }

  .playback-progress {
    grid-template-columns: auto minmax(78px, 1fr) 24px;
    gap: 8px;
    min-width: 145px;
  }

  .lab-grid {
    grid-template-columns: 182px minmax(0, 1fr) 260px;
  }

  .is-outputting .dual-graph-layout {
    grid-template-columns: minmax(0, 1fr) 48px minmax(0, 1fr);
    gap: 5px;
  }
}

@media (max-width: 980px) {
  .graph-actions {
    justify-content: space-between;
  }

  .lab-grid {
    grid-template-columns: 160px 1fr;
    grid-template-rows: minmax(620px, auto) auto;
    height: auto;
  }

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

  .canvas-meta strong {
    white-space: normal;
  }

  .control-panel {
    grid-column: 1 / -1;
    display: block;
    border-top: 1px solid var(--line);
    border-left: 0;
  }
}

@media (max-width: 720px) {
  body {
    background-position:
      center 42px,
      134% -28vw,
      -30% 18%,
      center;
    background-size:
      1180px auto,
      116vw 116vw,
      90vw 90vw,
      100% 100%;
  }

  .site-header {
    width: min(100% - 32px, 1240px);
    min-height: 0;
    padding: 21px 0 14px;
  }

  .author-strip {
    width: 100%;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .paper-byline {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .paper-links {
    padding-left: 0;
    border-left: 0;
  }

  .visual-section {
    width: calc(100% - 16px);
    margin: 28px auto 18px;
  }

  .lab {
    border-radius: 17px;
  }

  .graph-actions {
    align-items: stretch;
    flex-direction: column;
    width: 100%;
    margin-left: 0;
  }

  .lab-grid {
    display: block;
    height: auto;
  }

  .control-panel {
    display: flex;
    padding: 22px 20px;
  }

  .stage-rail {
    width: 100%;
    max-width: 100%;
    padding: 12px;
    overflow-x: auto;
    overflow-y: hidden;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    scrollbar-width: none;
  }

  .stage-rail::-webkit-scrollbar {
    display: none;
  }

  .rail-heading {
    display: none;
  }

  .stage-rail ol {
    flex-direction: row;
    width: max-content;
  }

  .stage-group-title {
    align-self: center;
    margin: 0 7px;
    padding: 0 6px;
    white-space: nowrap;
  }

  .stage-button {
    width: 142px;
  }

  .canvas-card {
    min-height: 570px;
  }

  .canvas-meta {
    align-items: stretch;
    flex-direction: column;
    gap: 12px;
    padding: 14px 16px;
  }

  .canvas-meta strong {
    max-width: none;
    white-space: normal;
  }

  .header-playback {
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-start;
    width: 100%;
    margin-left: 0;
  }

  .toolbar-separator {
    display: none;
  }

  .graph-canvas-wrap,
  .graph-canvas {
    min-height: 370px;
  }

  .graph-canvas-wrap.is-outputting {
    min-height: 760px;
    padding: 10px;
  }

  .is-outputting .dual-graph-layout {
    grid-template: minmax(330px, 1fr) 44px minmax(330px, 1fr) auto / 1fr;
    gap: 5px;
  }

  .is-outputting .graph-pane,
  .is-outputting .graph-canvas {
    min-height: 330px;
  }

  .is-outputting .transfer-arrow {
    transform: rotate(90deg);
  }

  .transport-controls {
    grid-template-columns: 28px 28px 40px 28px 28px;
    flex: 0 0 auto;
  }

  .playback-progress {
    flex: 1 1 180px;
    min-width: 170px;
  }

  .playback .speed-button {
    margin-left: auto;
  }

  dialog form {
    padding: 22px 20px 20px;
  }

  .dialog-intro {
    align-items: stretch;
    flex-direction: column;
    gap: 12px;
  }

  .graph-editor-link {
    width: 100%;
  }

  .editor-footer {
    align-items: start;
    flex-direction: column;
    gap: 3px;
  }
}

@media (max-width: 840px) {
  html[data-embed="true"] .lab-grid {
    display: grid;
    grid-template: minmax(0, 1fr) / minmax(0, 1fr);
    height: 100%;
  }

  html[data-embed="true"] .stage-rail,
  html[data-embed="true"] .control-panel {
    display: none;
  }

  html[data-embed="true"] .canvas-column,
  html[data-embed="true"] .canvas-card {
    height: 100%;
  }
}

@media (prefers-contrast: more) {
  body {
    background-image: linear-gradient(180deg, #fbfdfd 0%, #f3f8f8 100%);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }
}