:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --panel: rgba(255, 255, 255, 0.94);
  --panel-strong: #ffffff;
  --panel-border: rgba(15, 23, 42, 0.08);
  --text: #172033;
  --text-muted: #64748b;
  --accent: #2563eb;
  --accent-strong: #1d4ed8;
  --button: #ffffff;
  --button-border: rgba(15, 23, 42, 0.08);
  --button-hover: #f8fbff;
  --group-bg: rgba(15, 23, 42, 0.04);
  --editor-bg: #fbfcff;
  --preview-grid: rgba(15, 23, 42, 0.08);
  --error-bg: #fff2f2;
  --error-border: rgba(190, 24, 24, 0.18);
  --error-text: #a61b1b;
  --shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
  --toolbar-height: 74px;
  --diagram-zoom: 1;
}

body[data-theme='dark'] {
  color-scheme: dark;
  --bg: #0b1220;
  --panel: rgba(13, 20, 35, 0.92);
  --panel-strong: #0f172a;
  --panel-border: rgba(148, 163, 184, 0.14);
  --text: #e7edf7;
  --text-muted: #9fb0c9;
  --accent: #5eaefc;
  --accent-strong: #3895fb;
  --button: #121b2d;
  --button-border: rgba(148, 163, 184, 0.18);
  --button-hover: #172338;
  --group-bg: rgba(148, 163, 184, 0.08);
  --editor-bg: #08111f;
  --preview-grid: rgba(148, 163, 184, 0.1);
  --error-bg: rgba(127, 29, 29, 0.22);
  --error-border: rgba(248, 113, 113, 0.22);
  --error-text: #fecaca;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.42);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.1), transparent 30%),
    radial-gradient(circle at top right, rgba(14, 165, 233, 0.08), transparent 24%),
    var(--bg);
  color: var(--text);
}

button,
textarea {
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: var(--toolbar-height);
  padding: 12px 20px;
  overflow: visible;
  border-bottom: 1px solid var(--panel-border);
  background: color-mix(in srgb, var(--panel-strong) 88%, transparent);
  backdrop-filter: blur(18px);
}

.topbar__brand,
.topbar__center,
.topbar__right,
.action-group {
  display: flex;
  align-items: center;
}

.topbar__brand,
.topbar__center,
.topbar__right {
  flex-wrap: nowrap;
  flex: 0 0 auto;
}

.topbar__brand {
  gap: 12px;
  min-width: max-content;
}

.topbar__logo-wrap {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.28), transparent 42%), linear-gradient(180deg, rgba(37, 99, 235, 0.12), rgba(124, 58, 237, 0.16));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.22), 0 14px 28px rgba(37, 99, 235, 0.18);
}

.topbar__logo {
  width: 30px;
  height: 30px;
  display: block;
}

.topbar__title {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.topbar__center {
  justify-content: center;
  min-width: max-content;
}

.topbar__right {
  gap: 16px;
  min-width: max-content;
  margin-left: auto;
}

.action-group {
  gap: 8px;
  padding: 4px;
  flex: 0 0 auto;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: var(--group-bg);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.action-group--primary {
  background: color-mix(in srgb, var(--group-bg) 65%, var(--panel-strong));
}

.group-divider {
  width: 1px;
  height: 24px;
  flex: 0 0 auto;
  background: color-mix(in srgb, var(--text) 12%, transparent);
}

.button {
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 10px 14px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 150ms ease, border-color 150ms ease, box-shadow 150ms ease, color 150ms ease, transform 150ms ease;
}

.button:hover {
  background: var(--button-hover);
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.08);
}

.button:active {
  transform: translateY(1px);
}

.button:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--accent) 58%, transparent);
  outline-offset: 2px;
  background: var(--button-hover);
}

.button--primary {
  background: linear-gradient(180deg, var(--accent), color-mix(in srgb, var(--accent) 84%, #ffffff));
  color: #ffffff;
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.2);
}

.button--primary:hover,
.button--primary:focus-visible {
  background: linear-gradient(180deg, var(--accent-strong), color-mix(in srgb, var(--accent-strong) 84%, #ffffff));
  box-shadow: 0 12px 28px rgba(37, 99, 235, 0.24);
}

.button--icon {
  min-width: 56px;
  padding-inline: 12px;
}

.button__icon {
  width: 16px;
  height: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
}

.button__icon svg,
.sample-menu__caret svg {
  width: 16px;
  height: 16px;
  display: block;
}

.button__label {
  display: inline-block;
}

.overflow-menu,
.sample-menu {
  position: relative;
  flex: 0 0 auto;
}

.overflow-menu summary,
.sample-menu summary {
  list-style: none;
}

.overflow-menu summary::-webkit-details-marker,
.sample-menu summary::-webkit-details-marker {
  display: none;
}

.button--menu {
  background: var(--group-bg);
  border: 1px solid var(--panel-border);
}

.overflow-menu[open] .button--menu,
.sample-menu[open] .button--menu {
  background: var(--button-hover);
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.12);
}

.overflow-menu__panel,
.sample-menu__panel {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  z-index: 25;
  min-width: 196px;
  display: grid;
  gap: 4px;
  padding: 8px;
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  background: color-mix(in srgb, var(--panel-strong) 96%, transparent);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.overflow-menu__item,
.sample-menu__item {
  width: 100%;
  justify-content: flex-start;
  background: transparent;
}

.overflow-menu__item {
  display: inline-flex;
}

.overflow-menu__item .button__label {
  display: inline-block !important;
}

.sample-menu__panel {
  max-height: 360px;
  overflow-y: auto;
}

.sample-menu__item {
  height: 40px;
  display: flex;
  align-items: center;
  padding: 0 12px;
  border: 0;
  border-radius: 10px;
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
}

.sample-menu__item:hover,
.sample-menu__item:focus-visible {
  background: var(--button-hover);
  outline: none;
}

.sample-menu__caret {
  width: 14px;
  height: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 150ms ease;
}

.sample-menu[open] .sample-menu__caret {
  transform: rotate(180deg);
}

.workspace {
  flex: 1;
  display: flex;
  gap: 1.25rem;
  padding: 1.25rem;
  min-height: calc(100vh - var(--toolbar-height));
}

.panel {
  flex: 1 1 50%;
  min-width: 0;
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 1.25rem;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.1rem;
  border-bottom: 1px solid var(--panel-border);
  background: color-mix(in srgb, var(--panel-strong) 84%, transparent);
}

.panel__header h2,
.modal__header h2 {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.panel__header p,
.status,
.shortcut-hint,
.modal__header p {
  margin: 0.18rem 0 0;
  color: var(--text-muted);
  font-size: 0.84rem;
}

.editor-tools {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.85rem;
  position: relative;
}

.editor {
  flex: 1;
  width: 100%;
  min-height: 420px;
  border: 0;
  resize: none;
  padding: 1.25rem;
  background: var(--editor-bg);
  color: var(--text);
  font-family: Consolas, 'SFMono-Regular', Menlo, Monaco, monospace;
  font-size: 0.96rem;
  line-height: 1.6;
}

.editor:focus,
.embed-code:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 42%, transparent);
  outline-offset: -2px;
}

.preview-container {
  flex: 1;
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: stretch;
  justify-content: center;
  cursor: grab;
  user-select: none;
  touch-action: none;
  background:
    linear-gradient(var(--preview-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--preview-grid) 1px, transparent 1px),
    color-mix(in srgb, var(--panel-strong) 90%, transparent);
  background-size: 20px 20px, 20px 20px, auto;
}

.preview-stage {
  position: relative;
  width: 100%;
  min-height: 100%;
  overflow: hidden;
}

.preview-container.is-panning {
  cursor: grabbing;
}

.preview-container.is-panning * {
  cursor: grabbing !important;
}

.diagram-mount {
  position: absolute;
  top: 0;
  left: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.5rem;
  transform-origin: top left;
  transition: transform 180ms ease;
  will-change: transform;
}

.diagram-mount.is-interacting {
  transition: none;
}

.diagram-frame {
  flex: 0 0 auto;
  display: flex;
  justify-content: flex-start;
  overflow: visible;
}

.diagram-frame svg,
.diagram-mount svg {
  width: auto;
  height: auto;
  max-width: none;
  display: block;
  margin: 0;
  background: transparent;
}
body[data-theme='dark'] .diagram-frame svg,
body[data-theme='dark'] .diagram-mount svg {
  filter: drop-shadow(0 18px 30px rgba(0, 0, 0, 0.25));
}

body[data-theme='dark'] .diagram-svg--dark {
  border-radius: 1rem;
}

body[data-theme='dark'] .diagram-svg--dark text,
body[data-theme='dark'] .diagram-svg--dark tspan,
body[data-theme='dark'] .diagram-svg--dark .messageText,
body[data-theme='dark'] .diagram-svg--dark .loopText,
body[data-theme='dark'] .diagram-svg--dark .noteText,
body[data-theme='dark'] .diagram-svg--dark .sectionTitle,
body[data-theme='dark'] .diagram-svg--dark .sectionTitleText,
body[data-theme='dark'] .diagram-svg--dark .taskText,
body[data-theme='dark'] .diagram-svg--dark .titleText,
body[data-theme='dark'] .diagram-svg--dark .legend text,
body[data-theme='dark'] .diagram-svg--dark .edgeLabel text,
body[data-theme='dark'] .diagram-svg--dark .cluster-label text,
body[data-theme='dark'] .diagram-svg--dark .label text,
body[data-theme='dark'] .diagram-svg--dark .relationshipLabelBox text,
body[data-theme='dark'] .diagram-svg--dark .er.entityBox text,
body[data-theme='dark'] .diagram-svg--dark .entityLabel,
body[data-theme='dark'] .diagram-svg--dark .classTitleText,
body[data-theme='dark'] .diagram-svg--dark .node .label text,
body[data-theme='dark'] .diagram-svg--dark .flowchart-label text {
  fill: #e8eefc !important;
  color: #e8eefc !important;
}

body[data-theme='dark'] .diagram-svg--dark .actor text,
body[data-theme='dark'] .diagram-svg--dark .actor-box text,
body[data-theme='dark'] .diagram-svg--dark .labelBox text,
body[data-theme='dark'] .diagram-svg--dark .nodeLabel,
body[data-theme='dark'] .diagram-svg--dark .node text,
body[data-theme='dark'] .diagram-svg--dark .cluster text,
body[data-theme='dark'] .diagram-svg--dark .edgeLabel .label text,
body[data-theme='dark'] .diagram-svg--dark .classLabel .label text,
body[data-theme='dark'] .diagram-svg--dark .pieTitleText,
body[data-theme='dark'] .diagram-svg--dark .slice text,
body[data-theme='dark'] .diagram-svg--dark .journey-section text,
body[data-theme='dark'] .diagram-svg--dark .taskTextOutsideRight,
body[data-theme='dark'] .diagram-svg--dark .taskTextOutsideLeft,
body[data-theme='dark'] .diagram-svg--dark .taskText0,
body[data-theme='dark'] .diagram-svg--dark .taskText1,
body[data-theme='dark'] .diagram-svg--dark .taskText2,
body[data-theme='dark'] .diagram-svg--dark .taskText3 {
  fill: #0f172a !important;
  color: #0f172a !important;
}

body[data-theme='dark'] .diagram-svg--dark .labelBox,
body[data-theme='dark'] .diagram-svg--dark .label-container,
body[data-theme='dark'] .diagram-svg--dark .edgeLabel rect,
body[data-theme='dark'] .diagram-svg--dark .cluster rect,
body[data-theme='dark'] .diagram-svg--dark .note,
body[data-theme='dark'] .diagram-svg--dark .note rect,
body[data-theme='dark'] .diagram-svg--dark .task,
body[data-theme='dark'] .diagram-svg--dark .task0,
body[data-theme='dark'] .diagram-svg--dark .task1,
body[data-theme='dark'] .diagram-svg--dark .task2,
body[data-theme='dark'] .diagram-svg--dark .task3,
body[data-theme='dark'] .diagram-svg--dark .section0,
body[data-theme='dark'] .diagram-svg--dark .section1,
body[data-theme='dark'] .diagram-svg--dark .section2,
body[data-theme='dark'] .diagram-svg--dark .section3,
body[data-theme='dark'] .diagram-svg--dark .classTitle,
body[data-theme='dark'] .diagram-svg--dark .relationshipLabelBox,
body[data-theme='dark'] .diagram-svg--dark .cluster-alt,
body[data-theme='dark'] .diagram-svg--dark .journey-section,
body[data-theme='dark'] .diagram-svg--dark .journey-section rect {
  fill: #18233b !important;
  stroke: #d7e0f7 !important;
}

body[data-theme='dark'] .diagram-svg--dark .actor,
body[data-theme='dark'] .diagram-svg--dark .actor-man circle,
body[data-theme='dark'] .diagram-svg--dark .actor-woman circle,
body[data-theme='dark'] .diagram-svg--dark .actor-line,
body[data-theme='dark'] .diagram-svg--dark .node rect,
body[data-theme='dark'] .diagram-svg--dark .node circle,
body[data-theme='dark'] .diagram-svg--dark .node ellipse,
body[data-theme='dark'] .diagram-svg--dark .node polygon,
body[data-theme='dark'] .diagram-svg--dark .er.entityBox,
body[data-theme='dark'] .diagram-svg--dark .classGroup rect,
body[data-theme='dark'] .diagram-svg--dark .stateGroup rect,
body[data-theme='dark'] .diagram-svg--dark .state-title,
body[data-theme='dark'] .diagram-svg--dark .state-note,
body[data-theme='dark'] .diagram-svg--dark .classLabel rect,
body[data-theme='dark'] .diagram-svg--dark .pieCircle,
body[data-theme='dark'] .diagram-svg--dark .requirement,
body[data-theme='dark'] .diagram-svg--dark .requirementBox,
body[data-theme='dark'] .diagram-svg--dark .timeline-node {
  fill: #dbe4ff !important;
  stroke: #94a3b8 !important;
}

body[data-theme='dark'] .diagram-svg--dark .messageLine0,
body[data-theme='dark'] .diagram-svg--dark .messageLine1,
body[data-theme='dark'] .diagram-svg--dark .loopLine,
body[data-theme='dark'] .diagram-svg--dark .entityBox,
body[data-theme='dark'] .diagram-svg--dark .entityLabel,
body[data-theme='dark'] .diagram-svg--dark .relation,
body[data-theme='dark'] .diagram-svg--dark .flowchart-link,
body[data-theme='dark'] .diagram-svg--dark .edgePath .path,
body[data-theme='dark'] .diagram-svg--dark .cluster-line,
body[data-theme='dark'] .diagram-svg--dark .transition,
body[data-theme='dark'] .diagram-svg--dark .stateGroup line,
body[data-theme='dark'] .diagram-svg--dark .stateGroup path,
body[data-theme='dark'] .diagram-svg--dark .timeline-line,
body[data-theme='dark'] .diagram-svg--dark path,
body[data-theme='dark'] .diagram-svg--dark line,
body[data-theme='dark'] .diagram-svg--dark polyline {
  stroke: #d7e0f7 !important;
}

body[data-theme='dark'] .diagram-svg--dark marker path,
body[data-theme='dark'] .diagram-svg--dark .arrowheadPath,
body[data-theme='dark'] .diagram-svg--dark .arrowMarkerPath,
body[data-theme='dark'] .diagram-svg--dark .marker,
body[data-theme='dark'] .diagram-svg--dark .marker.cross,
body[data-theme='dark'] .diagram-svg--dark .marker.extension,
body[data-theme='dark'] .diagram-svg--dark .transition-marker {
  fill: #d7e0f7 !important;
  stroke: #d7e0f7 !important;
}

body[data-theme='dark'] .diagram-svg--dark .activation0,
body[data-theme='dark'] .diagram-svg--dark .activation1,
body[data-theme='dark'] .diagram-svg--dark .activation2 {
  fill: #5cb0ff !important;
  stroke: #d7e0f7 !important;
}

.zoom-controls {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 23, 0.6);
}

.modal__panel {
  position: relative;
  width: min(760px, 100%);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.25rem;
  border-radius: 1.2rem;
  border: 1px solid var(--panel-border);
  background: var(--panel-strong);
  box-shadow: var(--shadow);
}

.modal__header,
.modal__actions {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.embed-code {
  width: 100%;
  min-height: 180px;
  resize: vertical;
  border: 1px solid var(--panel-border);
  border-radius: 1rem;
  padding: 1rem;
  background: var(--editor-bg);
  color: var(--text);
  font-family: Consolas, 'SFMono-Regular', Menlo, Monaco, monospace;
  line-height: 1.5;
}

.empty-state,
.error-state {
  max-width: 24rem;
  padding: 1rem 1.2rem;
  border-radius: 1rem;
  border: 1px solid var(--panel-border);
  background: color-mix(in srgb, var(--panel-strong) 92%, transparent);
  text-align: center;
}

.error-state {
  background: var(--error-bg);
  border-color: var(--error-border);
  color: var(--error-text);
}

.is-hidden {
  display: none !important;
}

body.is-fullscreen .panel--editor {
  display: none;
}

body.is-fullscreen .panel--preview {
  flex-basis: 100%;
}

body.embed-mode {
  background: var(--panel-strong);
}

body.embed-mode .topbar,
body.embed-mode .panel--editor,
body.embed-mode .panel--preview > .panel__header {
  display: none;
}

body.embed-mode .workspace {
  padding: 0;
  min-height: 100vh;
}

body.embed-mode .panel--preview {
  flex-basis: 100%;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  background: var(--panel-strong);
}

body.embed-mode .preview-container {
  background: var(--panel-strong);
}

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

@media (max-width: 1680px) {
  .topbar {
    gap: 18px;
    padding-inline: 16px;
  }

  .topbar__right {
    gap: 12px;
  }

  .action-group {
    gap: 6px;
    padding: 3px;
  }

  .button {
    padding-inline: 12px;
  }
}

@media (max-width: 1480px) {
  .topbar {
    gap: 14px;
  }

  .topbar__right .action-group .button__label,
  .topbar .button--menu .button__label {
    display: none;
  }

  .topbar__right .action-group .button,
  .button--menu {
    min-width: 36px;
    padding-inline: 10px;
    gap: 0;
  }

  .topbar__right .action-group {
    gap: 4px;
  }

  .group-divider {
    margin-inline: -2px;
  }
}

@media (max-width: 1240px) {
  .topbar {
    gap: 12px;
    padding-inline: 12px;
  }

  .topbar__title {
    font-size: 15px;
  }

  .topbar__center .button__label {
    display: none;
  }

  .topbar__center .button {
    min-width: 36px;
    padding-inline: 10px;
    gap: 0;
  }

  .topbar__center .action-group {
    gap: 4px;
  }
}

@media (max-width: 1080px) {
  .workspace {
    flex-direction: column;
  }

  .panel {
    flex-basis: auto;
  }

  .editor {
    min-height: 320px;
  }

  .panel__header {
    flex-direction: column;
    align-items: stretch;
  }

  .editor-tools {
    justify-content: space-between;
  }
}

@media (max-width: 980px) {
  .topbar {
    gap: 10px;
    min-height: 68px;
  }

  .topbar__title {
    font-size: 14px;
  }

  .topbar__logo-wrap {
    width: 36px;
    height: 36px;
    border-radius: 12px;
  }

  .topbar__logo {
    width: 24px;
    height: 24px;
  }

  .group-divider {
    display: none;
  }

  .topbar__right {
    gap: 8px;
  }
}

@media (max-width: 760px) {
  .topbar {
    gap: 8px;
    padding: 10px 12px;
  }

  .topbar__brand {
    gap: 8px;
  }

  .topbar__title {
    font-size: 13px;
  }

  .action-group {
    padding: 2px;
    border-radius: 10px;
  }

  .button {
    height: 34px;
    min-width: 34px;
    padding-inline: 9px;
    border-radius: 7px;
  }

  .button__label,
  .shortcut-hint {
    display: none;
  }

  .sample-menu__caret {
    margin-left: -2px;
  }

  .workspace,
  .modal {
    padding: 0.9rem;
  }
}

@media (max-width: 640px) {
  .topbar__brand {
    gap: 10px;
  }

  .topbar__title {
    font-size: 14px;
  }

  .action-group {
    padding: 3px;
  }

  .sample-menu__panel {
    right: auto;
    left: 0;
  }
}










:root {
  --diagram-bg: #ffffff;
  --diagram-surface: #edf4ff;
  --diagram-surface-strong: #ffffff;
  --diagram-foreground: #172033;
  --diagram-muted: #475569;
  --diagram-stroke: #334155;
  --diagram-border: #94a3b8;
  --diagram-label-bg: #ffffff;
  --diagram-label-text: #172033;
  --diagram-note-bg: #f8fafc;
  --diagram-note-text: #172033;
  --diagram-accent: #2563eb;
  --diagram-shadow: 0 14px 28px rgba(15, 23, 42, 0.08);
}

body[data-theme='dark'] {
  --diagram-bg: #0f172a;
  --diagram-surface: #18233b;
  --diagram-surface-strong: #dbe4ff;
  --diagram-foreground: #e8eefc;
  --diagram-muted: #c6d2ea;
  --diagram-stroke: #d7e0f7;
  --diagram-border: #94a3b8;
  --diagram-label-bg: #18233b;
  --diagram-label-text: #e8eefc;
  --diagram-note-bg: #18233b;
  --diagram-note-text: #e8eefc;
  --diagram-accent: #5cb0ff;
  --diagram-shadow: 0 18px 30px rgba(0, 0, 0, 0.25);
}

.diagram-frame {
  border-radius: 1rem;
}

.diagram-frame svg {
  filter: drop-shadow(var(--diagram-shadow));
}

.diagram-frame svg[data-diagram-theme='light'],
.diagram-frame svg[data-diagram-theme='dark'] {
  background: transparent;
}

.diagram-frame svg [fill='white'],
.diagram-frame svg [fill='#fff'],
.diagram-frame svg [fill='#ffffff'] {
  fill: var(--diagram-surface-strong);
}

.diagram-frame svg text,
.diagram-frame svg tspan,
.diagram-frame svg foreignObject,
.diagram-frame svg .messageText,
.diagram-frame svg .loopText,
.diagram-frame svg .noteText,
.diagram-frame svg .sectionTitle,
.diagram-frame svg .sectionTitleText,
.diagram-frame svg .taskText,
.diagram-frame svg .titleText,
.diagram-frame svg .legend text,
.diagram-frame svg .edgeLabel text,
.diagram-frame svg .cluster-label text,
.diagram-frame svg .label text,
.diagram-frame svg .relationshipLabelBox text,
.diagram-frame svg .er.entityBox text,
.diagram-frame svg .entityLabel,
.diagram-frame svg .classTitleText,
.diagram-frame svg .node .label text,
.diagram-frame svg .flowchart-label text,
.diagram-frame svg .nodeLabel,
.diagram-frame svg .cluster text,
.diagram-frame svg .classLabel .label text,
.diagram-frame svg .pieTitleText,
.diagram-frame svg .slice text,
.diagram-frame svg .journey-section text,
.diagram-frame svg .taskTextOutsideRight,
.diagram-frame svg .taskTextOutsideLeft,
.diagram-frame svg .taskText0,
.diagram-frame svg .taskText1,
.diagram-frame svg .taskText2,
.diagram-frame svg .taskText3,
.diagram-frame svg .actor text,
.diagram-frame svg .actor-box text,
.diagram-frame svg .labelBox text,
.diagram-frame svg .requirement text,
.diagram-frame svg .timeline-node text,
.diagram-frame svg .quadrant text,
.diagram-frame svg .quadrant-chart text,
.diagram-frame svg .xychart text {
  fill: var(--diagram-foreground) !important;
  color: var(--diagram-foreground) !important;
}

.diagram-frame svg foreignObject > div,
.diagram-frame svg foreignObject div,
.diagram-frame svg .label foreignObject div,
.diagram-frame svg .nodeLabel foreignObject div,
.diagram-frame svg .edgeLabel foreignObject div {
  color: var(--diagram-label-text) !important;
  background: transparent !important;
}

.diagram-frame svg .labelBox,
.diagram-frame svg .label-container,
.diagram-frame svg .edgeLabel rect,
.diagram-frame svg .cluster rect,
.diagram-frame svg .note,
.diagram-frame svg .note rect,
.diagram-frame svg .task,
.diagram-frame svg .task0,
.diagram-frame svg .task1,
.diagram-frame svg .task2,
.diagram-frame svg .task3,
.diagram-frame svg .section0,
.diagram-frame svg .section1,
.diagram-frame svg .section2,
.diagram-frame svg .section3,
.diagram-frame svg .classTitle,
.diagram-frame svg .relationshipLabelBox,
.diagram-frame svg .cluster-alt,
.diagram-frame svg .journey-section,
.diagram-frame svg .journey-section rect,
.diagram-frame svg .labelBkg,
.diagram-frame svg .label-bg,
.diagram-frame svg .label-container rect {
  fill: var(--diagram-label-bg) !important;
  stroke: var(--diagram-stroke) !important;
}

.diagram-frame svg .actor,
.diagram-frame svg .actor-man circle,
.diagram-frame svg .actor-woman circle,
.diagram-frame svg .actor-line,
.diagram-frame svg .node rect,
.diagram-frame svg .node circle,
.diagram-frame svg .node ellipse,
.diagram-frame svg .node polygon,
.diagram-frame svg .node path,
.diagram-frame svg .er.entityBox,
.diagram-frame svg .classGroup rect,
.diagram-frame svg .stateGroup rect,
.diagram-frame svg .state-title,
.diagram-frame svg .state-note,
.diagram-frame svg .classLabel rect,
.diagram-frame svg .pieCircle,
.diagram-frame svg .requirement,
.diagram-frame svg .requirementBox,
.diagram-frame svg .timeline-node,
.diagram-frame svg .quadrant-1,
.diagram-frame svg .quadrant-2,
.diagram-frame svg .quadrant-3,
.diagram-frame svg .quadrant-4 {
  fill: var(--diagram-surface-strong) !important;
  stroke: var(--diagram-border) !important;
}

.diagram-frame svg .messageLine0,
.diagram-frame svg .messageLine1,
.diagram-frame svg .loopLine,
.diagram-frame svg .entityBox,
.diagram-frame svg .entityLabel,
.diagram-frame svg .relation,
.diagram-frame svg .flowchart-link,
.diagram-frame svg .edgePath .path,
.diagram-frame svg .cluster-line,
.diagram-frame svg .transition,
.diagram-frame svg .stateGroup line,
.diagram-frame svg .stateGroup path,
.diagram-frame svg .timeline-line,
.diagram-frame svg path,
.diagram-frame svg line,
.diagram-frame svg polyline,
.diagram-frame svg polygon,
.diagram-frame svg rect,
.diagram-frame svg circle,
.diagram-frame svg ellipse {
  stroke: var(--diagram-stroke);
}

.diagram-frame svg marker path,
.diagram-frame svg .arrowheadPath,
.diagram-frame svg .arrowMarkerPath,
.diagram-frame svg .marker,
.diagram-frame svg .marker.cross,
.diagram-frame svg .marker.extension,
.diagram-frame svg .transition-marker {
  fill: var(--diagram-stroke) !important;
  stroke: var(--diagram-stroke) !important;
}

.diagram-frame svg .activation0,
.diagram-frame svg .activation1,
.diagram-frame svg .activation2,
.diagram-frame svg .active0,
.diagram-frame svg .active1,
.diagram-frame svg .active2 {
  fill: var(--diagram-accent) !important;
  stroke: var(--diagram-stroke) !important;
}

.diagram-frame svg .note,
.diagram-frame svg .note rect,
.diagram-frame svg .requirementBox,
.diagram-frame svg .timeline-node rect {
  fill: var(--diagram-note-bg) !important;
}

.diagram-frame svg .noteText,
.diagram-frame svg .requirement text,
.diagram-frame svg .timeline-node text {
  fill: var(--diagram-note-text) !important;
  color: var(--diagram-note-text) !important;
}

body[data-theme='dark'] .preview-container {
  background:
    linear-gradient(var(--preview-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--preview-grid) 1px, transparent 1px),
    radial-gradient(circle at top, rgba(94, 174, 252, 0.08), transparent 42%),
    color-mix(in srgb, var(--panel-strong) 92%, #060d18 8%);
}

body[data-theme='dark'] .diagram-frame svg .actor,
body[data-theme='dark'] .diagram-frame svg .actor rect,
body[data-theme='dark'] .diagram-frame svg .actor-box,
body[data-theme='dark'] .diagram-frame svg .labelBox,
body[data-theme='dark'] .diagram-frame svg .labelBox rect {
  fill: #dbe4ff !important;
  stroke: #94a3b8 !important;
}

body[data-theme='dark'] .diagram-frame svg .actor text,
body[data-theme='dark'] .diagram-frame svg .actor tspan,
body[data-theme='dark'] .diagram-frame svg .actor-box text,
body[data-theme='dark'] .diagram-frame svg .actor-box tspan,
body[data-theme='dark'] .diagram-frame svg .labelBox text,
body[data-theme='dark'] .diagram-frame svg .labelBox tspan,
body[data-theme='dark'] .diagram-frame svg .labelText,
body[data-theme='dark'] .diagram-frame svg .labelText tspan {
  fill: #0f172a !important;
  color: #0f172a !important;
}

body[data-theme='dark'] .diagram-frame svg .messageText,
body[data-theme='dark'] .diagram-frame svg .messageText tspan,
body[data-theme='dark'] .diagram-frame svg .loopText,
body[data-theme='dark'] .diagram-frame svg .loopText tspan,
body[data-theme='dark'] .diagram-frame svg .noteText,
body[data-theme='dark'] .diagram-frame svg .noteText tspan,
body[data-theme='dark'] .diagram-frame svg .sequenceNumber,
body[data-theme='dark'] .diagram-frame svg .sectionTitle,
body[data-theme='dark'] .diagram-frame svg .sectionTitleText {
  fill: #e8eefc !important;
  color: #e8eefc !important;
}

body[data-theme='dark'] .diagram-frame svg .note,
body[data-theme='dark'] .diagram-frame svg .note rect,
body[data-theme='dark'] .diagram-frame svg .loopLine,
body[data-theme='dark'] .diagram-frame svg .loopLine rect,
body[data-theme='dark'] .diagram-frame svg .rect,
body[data-theme='dark'] .diagram-frame svg .labelBox,
body[data-theme='dark'] .diagram-frame svg .labelBox rect {
  stroke: #d7e0f7 !important;
}

body[data-theme='dark'] .diagram-frame svg .note,
body[data-theme='dark'] .diagram-frame svg .note rect,
body[data-theme='dark'] .diagram-frame svg .labelBox,
body[data-theme='dark'] .diagram-frame svg .labelBox rect {
  fill: #18233b !important;
}


.shortcut-hint {
  position: relative;
  margin: 0;
  flex: 0 0 auto;
}

.shortcut-hint summary {
  list-style: none;
}

.shortcut-hint summary::-webkit-details-marker {
  display: none;
}

.shortcut-hint__trigger {
  height: 34px;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0 0.85rem;
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel-strong) 84%, transparent);
  color: var(--text-muted);
  cursor: pointer;
  transition: background-color 150ms ease, border-color 150ms ease, box-shadow 150ms ease, color 150ms ease;
}

.shortcut-hint__trigger:hover,
.shortcut-hint[open] .shortcut-hint__trigger {
  color: var(--text);
  background: var(--button-hover);
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.08);
}

.shortcut-hint__trigger:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--accent) 58%, transparent);
  outline-offset: 2px;
}

.shortcut-hint__icon {
  width: 18px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1;
}

.shortcut-hint__text {
  font-size: 0.83rem;
  font-weight: 600;
}

.shortcut-hint__panel {
  position: absolute;
  top: calc(100% + 0.7rem);
  right: 0;
  min-width: 260px;
  display: grid;
  gap: 0.7rem;
  padding: 0.9rem;
  border: 1px solid var(--panel-border);
  border-radius: 1rem;
  background: color-mix(in srgb, var(--panel-strong) 92%, transparent);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  z-index: 12;
}

.shortcut-hint__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.shortcut-hint__label {
  color: var(--text);
  font-size: 0.84rem;
  font-weight: 500;
}

.shortcut-hint__keys {
  display: inline-flex;
  align-items: center;
  gap: 0.32rem;
  color: var(--text-muted);
  font-size: 0.78rem;
}

.shortcut-hint__keys kbd {
  min-width: 28px;
  padding: 0.22rem 0.45rem;
  border: 1px solid var(--panel-border);
  border-bottom-width: 2px;
  border-radius: 0.55rem;
  background: color-mix(in srgb, var(--panel-strong) 94%, transparent);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  text-align: center;
  box-shadow: inset 0 -1px 0 rgba(15, 23, 42, 0.08);
}

.shortcut-hint__meta {
  padding-top: 0.15rem;
  border-top: 1px solid var(--panel-border);
  color: var(--text-muted);
  font-size: 0.76rem;
}

body[data-theme='dark'] .shortcut-hint__trigger {
  background: color-mix(in srgb, var(--panel-strong) 86%, transparent);
}

body[data-theme='dark'] .shortcut-hint__keys kbd {
  box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.05);
}

@media (max-width: 980px) {
  .shortcut-hint__panel {
    right: auto;
    left: 0;
  }
}