:root {
  --page: #edf2f7;
  --page-soft: #f8fafc;
  --panel: #ffffff;
  --panel-soft: #f8fafc;
  --ink: #172033;
  --ink-soft: #334155;
  --muted: #667085;
  --line: #cbd5e1;
  --line-soft: #e2e8f0;
  --accent: #3867d6;
  --accent-dark: #2852b6;
  --accent-soft: #e8efff;
  --accent-ring: rgb(56 103 214 / 22%);
  --success: #2f9464;
  --success-dark: #21794d;
  --success-soft: #e8f7ef;
  --warning: #b66d00;
  --warning-soft: #fff4cf;
  --danger: #c0392b;
  --danger-dark: #9f2f25;
  --danger-soft: #fff0ee;
  --purple: #7650b8;
  --purple-soft: #f1eaff;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow: 0 18px 45px rgb(15 23 42 / 11%);
  --shadow-soft: 0 8px 22px rgb(15 23 42 / 8%);
  --control-scale: 1;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--page);
  scrollbar-gutter: stable;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at top left, rgb(56 103 214 / 9%), transparent 34rem),
    linear-gradient(180deg, #f8fafc 0%, #edf2f7 52%, #e6edf5 100%);
}

button,
input,
select {
  font: inherit;
}

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

.app-header {
  position: sticky;
  top: 0;
  z-index: 40;
  padding: 7px 12px;
  color: white;
  background: linear-gradient(135deg, #172033 0%, #243b68 62%, #3867d6 100%);
  box-shadow: 0 10px 26px rgb(15 23 42 / 16%);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  margin: 0 auto;
}

.brand-block h1 {
  margin: 0;
  font-size: clamp(1.32rem, 2vw, 1.78rem);
  font-weight: 850;
  letter-spacing: -0.025em;
}

.brand-block p {
  margin: 2px 0 0;
  color: rgb(226 232 240 / 88%);
  font-size: 0.9rem;
  font-weight: 560;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-action {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 7px 11px;
  border: 1px solid rgb(255 255 255 / 26%);
  border-radius: 11px;
  color: #172033;
  background: white;
  box-shadow: 0 8px 18px rgb(15 23 42 / 14%);
  font-size: 0.82rem;
  font-weight: 780;
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease, box-shadow 120ms ease;
}

.header-action:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgb(15 23 42 / 18%);
}

.header-action:active:not(:disabled) {
  transform: translateY(0);
}

.header-action:disabled {
  color: #8994a4;
  background: #edf2f7;
  cursor: not-allowed;
  opacity: 0.72;
  box-shadow: none;
}

.save-action {
  border-color: #f2c14e;
  color: #513600;
  background: linear-gradient(180deg, #ffe9ad 0%, #ffd36b 100%);
}

.download-action {
  color: #1e3a70;
  background: linear-gradient(180deg, #ffffff 0%, #edf4ff 100%);
}

.app-layout {
  display: grid;
  grid-template-columns: 224px minmax(0, 1fr) 224px;
  gap: 10px;
  width: 100%;
  margin: 0;
  padding: 8px 10px 20px;
}

.toolbar,
.guide-panel {
  position: sticky;
  top: 66px;
  align-self: start;
  border: 1px solid rgb(203 213 225 / 84%);
  border-radius: var(--radius-lg);
  background: rgb(255 255 255 / 92%);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(10px);
}

.guide-panel {
  max-height: calc(100vh - 78px);
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-gutter: auto !important;
}

.toolbar {
  z-index: 20;
  max-height: none;
  overflow: visible;
  padding: 10px;
}

.panel-title-block {
  padding: 2px 2px 10px;
}

.eyebrow {
  margin: 0 0 3px;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.panel-title-block h2,
.workspace-head h2 {
  margin: 0;
  color: var(--ink);
  font-size: 1.05rem;
  line-height: 1.15;
  letter-spacing: -0.015em;
}

.toolbar-section {
  padding: 10px 0;
  border-top: 1px solid var(--line-soft);
}

.toolbar-section h3 {
  margin: 0 0 7px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 820;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.primary-tool-section {
  padding-top: 0;
  border-top: 0;
}

.tool-grid,
.edit-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
}

.tool-button,
.action-button,
.history-button {
  display: flex;
  min-width: 0;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  width: 100%;
  padding: 7px 6px;
  border: 1px solid transparent;
  border-radius: 12px;
  color: var(--ink-soft);
  background: var(--panel-soft);
  box-shadow: inset 0 0 0 1px rgb(226 232 240 / 74%);
  font-size: 0.74rem;
  font-weight: 760;
  line-height: 1.08;
  text-align: center;
  cursor: pointer;
  transition: transform 110ms ease, background 110ms ease, border-color 110ms ease, color 110ms ease, box-shadow 110ms ease;
}

.select-button {
  min-height: 48px;
  flex-direction: row;
  justify-content: flex-start;
  padding-inline: 12px;
  font-size: 0.86rem;
}

.tool-button:hover,
.action-button:hover,
.history-button:hover:not(:disabled) {
  border-color: #b7c5d8;
  color: var(--ink);
  background: white;
  box-shadow: inset 0 0 0 1px #cbd5e1, 0 8px 18px rgb(15 23 42 / 8%);
}

.tool-button:active,
.action-button:active,
.history-button:active:not(:disabled) {
  transform: translateY(1px);
}

.tool-button.active,
.polygon-button.active,
.text-button.active {
  border-color: var(--accent);
  color: #1f4fbf;
  background: var(--accent-soft);
  box-shadow: inset 0 0 0 1px rgb(56 103 214 / 18%), 0 8px 18px rgb(56 103 214 / 12%);
}

.tool-button.danger-tool,
.action-button.danger {
  color: var(--danger-dark);
  background: #fff7f5;
  box-shadow: inset 0 0 0 1px rgb(192 57 43 / 13%);
}

.tool-button.danger-tool:hover,
.action-button.danger:hover,
.tool-button.danger-tool.active {
  border-color: var(--danger);
  color: var(--danger-dark);
  background: var(--danger-soft);
}

.tool-icon {
  flex: 0 0 21px;
  width: 21px;
  height: 21px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.85;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.header-action .tool-icon {
  flex-basis: 18px;
  width: 18px;
  height: 18px;
}

.select-button .tool-icon {
  flex-basis: 21px;
  width: 21px;
  height: 21px;
}

.tool-with-options {
  display: grid;
  gap: 7px;
  min-width: 0;
}

.sides-control,
.text-value-control,
.text-size-control,
.text-font-control {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  color: var(--muted);
  background: white;
  font-size: 0.8rem;
  font-weight: 760;
}

.toolbar[data-active-tool="polygon"] .sides-control,
.toolbar[data-active-tool="text"] .text-value-control,
.toolbar[data-active-tool="text"] .text-size-control,
.toolbar[data-active-tool="text"] .text-font-control,
.toolbar.editing-text .text-value-control,
.toolbar.editing-text .text-size-control,
.toolbar.editing-text .text-font-control {
  display: flex;
}

.sides-control {
  margin-top: 8px;
}

.sides-control input,
.text-value-control input,
.text-size-control input,
.text-font-control select,
.save-dialog input {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--ink);
  background: white;
}

.sides-control input,
.text-size-control input {
  width: 58px;
  padding: 6px;
  text-align: center;
}

.text-value-control,
.text-size-control,
.text-font-control,
.text-tool-group {
  grid-column: 1 / -1;
}

.text-value-control input,
.text-font-control select {
  width: 132px;
  padding: 6px;
}

.tool-button:focus-visible,
.action-button:focus-visible,
.history-button:focus-visible,
.header-action:focus-visible,
.dialog-button:focus-visible,
.sides-control input:focus-visible,
.text-value-control input:focus-visible,
.text-size-control input:focus-visible,
.text-font-control select:focus-visible {
  outline: 3px solid var(--accent-ring);
  outline-offset: 2px;
}

.workspace-area {
  display: grid;
  justify-items: center;
  align-content: start;
  min-width: 0;
  gap: 8px;
  overflow: visible;
  padding-bottom: 10px;
}



.workspace-edit-section {
  display: flex;
  align-items: center;
  gap: 10px;
  width: min(100%, 980px);
  padding: 5px 7px;
  border: 1px solid rgb(203 213 225 / 88%);
  border-radius: 14px;
  background: rgb(255 255 255 / 94%);
  box-shadow: var(--shadow-soft);
}

.workspace-edit-section h3 {
  display: none;
}

.workspace-edit-section .edit-grid {
  display: flex;
  flex: 1 1 auto;
  flex-wrap: wrap;
  grid-template-columns: none;
  gap: 6px;
}

.workspace-edit-section .tool-button,
.workspace-edit-section .action-button {
  min-height: 32px;
  width: auto;
  min-width: 88px;
  flex: 1 1 96px;
  flex-direction: row;
  gap: 6px;
  padding: 5px 8px;
  border-radius: 10px;
}

.workspace-edit-section .tool-icon {
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
}

.canvas-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  width: min(100%, 680px);
  margin: 0 auto -2px;
  padding: 0 4px;
}

.canvas-action {
  display: inline-flex;
  min-height: 34px;
  min-width: 0;
  width: auto;
  align-items: center;
  justify-content: center;
  flex-direction: row;
  gap: 6px;
  padding: 6px 10px;
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  color: var(--ink-soft);
  background: white;
  box-shadow: var(--shadow-soft);
  font-size: 0.78rem;
  font-weight: 760;
}

.canvas-action:disabled {
  color: #8c98a8;
  background: #eef2f7;
  cursor: not-allowed;
  opacity: 0.72;
  box-shadow: none;
}

.canvas-action .tool-icon {
  flex-basis: 18px;
  width: 18px;
  height: 18px;
}

.workspace-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  width: min(100%, 680px);
  padding: 0 4px;
}

.workspace-head p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 640;
}

.workspace-frame {
  position: relative;
  display: flex;
  width: max-content;
  max-width: none;
  margin-inline: auto;
  padding: 8px;
  border: 1px solid rgb(203 213 225 / 88%);
  border-radius: 20px;
  background: linear-gradient(180deg, #e7edf6 0%, #dbe4ef 100%);
  box-shadow: var(--shadow);
}

#workspace {
  display: block;
  width: min(960px, calc(100vw - 490px));
  min-width: 760px;
  height: auto;
  aspect-ratio: 1;
  border: 1px solid #cbd5e1;
  border-radius: 14px;
  background:
    radial-gradient(circle, rgb(148 163 184 / 28%) 1px, transparent 1px),
    linear-gradient(180deg, #f1f5f9 0%, #e7edf5 100%);
  background-size: 18px 18px, auto;
  box-shadow: inset 0 0 0 1px rgb(255 255 255 / 72%);
  touch-action: none;
  user-select: none;
}

#export-area {
  fill: white;
  stroke: #475569;
  stroke-width: 1.6;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
  filter: drop-shadow(0 10px 20px rgb(15 23 42 / 12%));
}

.guide-panel {
  padding: 10px;
}

.guide-card {
  padding: 11px;
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  background: var(--panel-soft);
}

.guide-card + .guide-card {
  margin-top: 10px;
}

.guide-card h3 {
  margin: 0 0 6px;
  font-size: 0.92rem;
  line-height: 1.25;
}

.guide-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.45;
}


.active-guide h2 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  line-height: 1.2;
}

.guide-steps {
  margin: 10px 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.42;
}

.guide-steps li + li {
  margin-top: 6px;
}

.legend-row {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.35;
}

.legend-row + 
.active-guide h2 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  line-height: 1.2;
}

.guide-steps {
  margin: 10px 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.42;
}

.guide-steps li + li {
  margin-top: 6px;
}

.legend-row {
  margin-top: 7px;
}

.legend-dot {
  display: inline-block;
  width: 13px;
  height: 13px;
  border-radius: 999px;
  background: white;
  flex: 0 0 13px;
}

.legend-dot.blue {
  border: 3px solid var(--accent);
}

.legend-dot.green {
  border: 3px solid var(--success);
}

.legend-dot.yellow {
  background: var(--warning-soft);
  border: 3px solid var(--warning);
}

.legend-dot.red {
  border: 3px solid var(--danger);
}

#workspace[data-tool="select"] {
  cursor: default;
}

#workspace[data-tool="rect"],
#workspace[data-tool="circle"],
#workspace[data-tool="ellipse"],
#workspace[data-tool="line"],
#workspace[data-tool="arc"],
#workspace[data-tool="text"],
#workspace[data-tool="polygon"],
#workspace[data-tool="pen"] {
  cursor: crosshair;
}

#workspace[data-tool="delete-edge"],
#workspace[data-tool="add-point"],
#workspace[data-tool="measure"] {
  cursor: pointer;
}

#workspace[data-tool="eraser"] {
  cursor: none;
}

#workspace[data-tool="pencil"] {
  cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16'%3E%3Ccircle cx='8' cy='8' r='3' fill='%23172033' stroke='white' stroke-width='1.5'/%3E%3C/svg%3E") 8 8, crosshair;
}

.drawable {
  pointer-events: all;
}

.hover-handle,
.hover-move-target,
.hover-move-ring,
.hover-move-center,
.handle,
.move-handle-ring,
.move-handle-center,
.rotate-handle,
.rotate-symbol,
.draft-point,
.snap-vertex,
.snap-active-halo,
.snap-active-marker,
.eraser-preview,
[data-handle="move"],
[data-handle="group-move"] {
  transform-box: fill-box;
  transform-origin: center;
  scale: var(--control-scale, 1);
}

.hover-handle,
.hover-move-ring,
.handle,
.move-handle-ring,
.scale-handle,
.rect-side-handle,
.draft-point,
.snap-vertex,
.snap-active-halo,
.snap-active-marker,
.eraser-preview,
.selection-bounds,
.marquee-selection,
.arc-control-guide,
.pen-preview,
.arc-height-handle,
.edge-preview {
  vector-effect: non-scaling-stroke;
}

.selection-hit {
  fill: transparent;
  stroke: transparent;
  stroke-width: 16;
  pointer-events: stroke;
  cursor: pointer;
}

.hover-handle {
  r: 4.2px;
  fill: white;
  stroke: var(--success);
  stroke-width: 2.2;
  pointer-events: none;
}

.hover-move-target {
  cursor: move;
  pointer-events: all;
}

.hover-move-ring,
.move-handle-ring {
  fill: #eef2ff;
  stroke: #5866c5;
  stroke-width: 2.5;
  pointer-events: none;
}

.hover-move-center,
.move-handle-center {
  fill: #5866c5;
  stroke: none;
  pointer-events: none;
}

[data-hover-move],
[data-handle="move"],
[data-handle="group-move"] {
  cursor: move;
}

.handle {
  r: 4.2px;
  fill: white;
  stroke: var(--success);
  stroke-width: 2.3;
  cursor: pointer;
  pointer-events: none;
}

.vertex-handle-target {
  fill: transparent;
  stroke: transparent;
  pointer-events: all;
  cursor: pointer;
}

.handle:hover {
  fill: var(--success-soft);
}

.handle[data-handle="rect-vertex"][data-index="0"],
.handle[data-handle="rect-vertex"][data-index="2"] {
  cursor: nwse-resize;
}

.handle[data-handle="rect-vertex"][data-index="1"],
.handle[data-handle="rect-vertex"][data-index="3"] {
  cursor: nesw-resize;
}

.handle[data-handle="arc-point"] {
  fill: white;
  stroke: var(--success);
  stroke-width: 2.4;
}

.handle[data-handle="arc-point"]:hover {
  fill: var(--success-soft);
}

.handle[data-handle="circle-radius"],
.handle[data-handle="ellipse-radius"],
.rect-side-handle,
.arc-height-handle {
  fill: #ecfdf5;
  stroke: #23816f;
  stroke-width: 2.2;
}

.handle[data-handle="circle-radius"]:hover,
.handle[data-handle="ellipse-radius"]:hover {
  fill: #c9f1e3;
}

.handle[data-handle="arc-bend"] {
  r: 4.6px;
  fill: var(--warning-soft);
  stroke: var(--warning);
  stroke-width: 2.4;
  cursor: move;
}

.handle[data-handle="arc-bend"]:hover {
  fill: #ffe29a;
}

.arc-bend-halo {
  fill: white;
  stroke: white;
  stroke-width: 2;
  pointer-events: none;
  transform-box: fill-box;
  transform-origin: center;
  scale: var(--control-scale, 1);
}

.arc-control-guide {
  fill: none;
  stroke: #c88520;
  stroke-width: 1.5;
  stroke-dasharray: 4 4;
  pointer-events: none;
}

.arc-height-handle {
  cursor: ns-resize;
}

.selection-bounds {
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.45;
  stroke-dasharray: 5 4;
  pointer-events: none;
}

.group-selection-bounds {
  stroke-dasharray: 7 5;
}

.marquee-selection {
  fill: rgb(56 103 214 / 12%);
  stroke: var(--accent);
  stroke-width: 1.4;
  stroke-dasharray: 5 3;
  pointer-events: none;
}

.scale-handle {
  r: 4.2px;
  fill: var(--purple-soft);
  stroke: var(--purple);
  stroke-width: 2.2;
  cursor: nwse-resize;
}

.scale-handle:hover {
  fill: #dfd2f6;
}

.scale-handle[data-index="1"],
.scale-handle[data-index="3"] {
  cursor: nesw-resize;
}

.rotate-handle {
  fill: transparent;
  stroke: transparent;
  cursor: grab;
}

.rotate-handle:active {
  cursor: grabbing;
}

.rotate-symbol {
  pointer-events: none;
}

.rect-side-target {
  fill: transparent;
  stroke: transparent;
  stroke-width: 16;
  cursor: ew-resize;
}

.rect-side-target[data-index="0"],
.rect-side-target[data-index="2"] {
  cursor: ns-resize;
}

.rect-side-handle {
  opacity: 1;
  pointer-events: none;
}

.handle.selected-point {
  r: 4.8px;
  fill: #ffd86b;
  stroke: #976000;
  stroke-width: 2.4;
}

.handle.snap-target {
  fill: white;
  stroke: var(--success);
  stroke-width: 2.8;
}

.handle.selected-point.snap-target {
  fill: #ffd86b;
  stroke: #976000;
  stroke-width: 2.4;
}

.draft-point {
  r: 3.4px;
  fill: var(--accent);
  stroke: white;
  stroke-width: 1.4;
  pointer-events: none;
}

.draft-point.snap-point {
  r: 4.2px;
  fill: white;
  stroke: var(--accent);
  stroke-width: 2.2;
}

.draft-point.snap-ready,
.draft-point.snap-point.snap-ready {
  fill: white;
  stroke: var(--success);
  stroke-width: 2.6;
}

.draft-point.snap-point.snap-ready {
  r: 4.6px;
}

.snap-vertex {
  r: 3.8px;
  fill: white;
  stroke: var(--success);
  stroke-width: 2;
  pointer-events: none;
}

.active-snap-placeholder {
  visibility: hidden;
}

.snap-active-halo {
  fill: transparent;
  stroke: var(--success);
  stroke-width: 1.5;
  opacity: 0.35;
  pointer-events: none;
}

.snap-active-marker {
  r: 4.4px;
  fill: white;
  stroke: var(--success);
  stroke-width: 2.8;
  pointer-events: none;
}

.pen-preview {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-dasharray: 6 4;
  stroke-linecap: round;
  pointer-events: none;
}

.eraser-preview {
  fill: rgb(255 255 255 / 68%);
  stroke: #e04435;
  stroke-width: 1.5;
  stroke-dasharray: 3 2;
  pointer-events: none;
}

.edge-target {
  fill: none;
  stroke: transparent;
  stroke-width: 16;
  stroke-linecap: round;
  pointer-events: stroke;
  cursor: pointer;
}

.edge-preview {
  fill: none;
  stroke: #e04435;
  stroke-width: 4;
  stroke-linecap: round;
  pointer-events: none;
  opacity: 0.22;
}

.edge-target:hover + .edge-preview {
  opacity: 1;
}

.add-point-preview {
  stroke: var(--success);
}

.floating-point-actions {
  position: absolute;
  z-index: 5;
  display: flex;
  gap: 8px;
  transform: translate(-50%, 0);
}

.floating-point-actions[hidden],
.floating-point-action[hidden] {
  display: none;
}

.floating-point-action {
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 38px;
  padding: 8px 13px;
  border: 1px solid rgb(138 91 0 / 42%);
  border-radius: 12px;
  color: #674300;
  background: linear-gradient(180deg, #fff8dd 0%, #ffefb0 100%);
  box-shadow: 0 12px 28px rgb(15 23 42 / 18%);
  font-size: 0.82rem;
  font-weight: 850;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 110ms ease, box-shadow 110ms ease, background 110ms ease;
}

.floating-point-action:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 32px rgb(15 23 42 / 22%);
}

.floating-point-action:active {
  transform: translateY(0);
}

.floating-point-action.delete-point-action {
  border-color: rgb(192 57 43 / 45%);
  color: var(--danger-dark);
  background: linear-gradient(180deg, #fff4f2 0%, #ffe2de 100%);
}

.floating-point-action.join-pencil-action {
  border-color: rgb(47 148 100 / 45%);
  color: #1f6845;
  background: linear-gradient(180deg, #f0fff6 0%, #dcf7e9 100%);
}

.floating-point-action svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.85;
  stroke-linecap: round;
  stroke-linejoin: round;
}

#separate-points-button svg,
#delete-selected-point-button svg {
  display: none;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.dialog-button {
  min-height: 42px;
  padding: 10px 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  color: var(--ink);
  background: white;
  font-weight: 800;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease, color 120ms ease;
}

.dialog-button:hover:not(:disabled) {
  border-color: #aebdd0;
  background: var(--panel-soft);
}

.dialog-button.danger {
  border-color: var(--danger);
  color: white;
  background: var(--danger);
}

.dialog-button.save {
  border-color: #d99b1e;
  color: #523500;
  background: linear-gradient(180deg, #ffe39a 0%, #ffd36b 100%);
}

.dialog-button.save:hover:not(:disabled) {
  background: linear-gradient(180deg, #ffedb5 0%, #ffda7a 100%);
}

.dialog-button:disabled,
.dialog-button.save:disabled {
  border-color: #d8dee8;
  color: #8b94a6;
  background: #edf0f4;
  cursor: not-allowed;
}

.save-dialog {
  width: min(400px, calc(100vw - 32px));
  padding: 0;
  border: 0;
  border-radius: 18px;
  color: var(--ink);
  background: white;
  box-shadow: 0 24px 70px rgb(15 23 42 / 32%);
}

.save-dialog::backdrop {
  background: rgb(15 23 42 / 48%);
  backdrop-filter: blur(3px);
}

.save-dialog form {
  padding: 24px;
}

.save-dialog-icon {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 14px;
  color: #774f00;
  background: #fff0bd;
}

.save-dialog-icon svg {
  width: 25px;
  height: 25px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.85;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.save-dialog h2 {
  margin: 14px 0 8px;
  font-size: 1.35rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.save-dialog p {
  margin: 0 0 18px;
  color: var(--muted);
  line-height: 1.5;
}

.save-dialog label {
  display: block;
  margin-bottom: 6px;
  color: var(--ink-soft);
  font-size: 0.9rem;
  font-weight: 780;
}

.save-dialog input {
  width: 100%;
  padding: 11px 12px;
}

.save-dialog input:focus {
  border-color: #d99b1e;
  outline: 3px solid rgb(255 216 107 / 34%);
}

.save-dialog .dialog-error {
  min-height: 1.4em;
  margin: 6px 0 8px;
  color: var(--danger);
  font-size: 0.85rem;
  font-weight: 750;
}



/* Layout rifinito: strumenti ai lati, area centrale più ampia. */
.app-layout {
  grid-template-columns: 224px minmax(0, 1fr) 224px;
  gap: 10px;
  width: 100%;
  padding: 8px 10px 20px;
}

.toolbar,
.guide-panel {
  top: 66px;
}

.toolbar {
  padding: 10px;
}

.guide-panel {
  padding: 10px;
  max-height: calc(100vh - 78px);
  scrollbar-gutter: auto !important;
}

.workspace-area {
  gap: 8px;
  overflow: visible;
}

.workspace-edit-section {
  width: min(100%, 980px);
  padding: 5px 7px;
  border-radius: 14px;
}

.workspace-edit-section h3 {
  display: none;
}

.workspace-frame {
  padding: 8px;
}

#workspace {
  width: min(960px, calc(100vw - 490px));
  min-width: 760px;
}

@media (min-width: 1181px) {
  .app-layout {
    grid-template-columns: 224px minmax(760px, 1fr) 224px;
  }
}

@media (max-width: 1180px) {
  .app-layout {
    grid-template-columns: 260px minmax(500px, 1fr);
  }

  .guide-panel {
    position: static;
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
    max-height: none;
  }

  .guide-panel .panel-title-block {
    grid-column: 1 / -1;
  }

  .guide-card + .guide-card {
    margin-top: 0;
  }

  #workspace {
    width: min(760px, calc(100vw - 310px));
    min-width: 560px;
  }
}

@media (max-width: 860px) {
  .app-header {
    position: static;
    padding: 14px 16px;
  }

  .header-content {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .header-actions {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .header-action {
    padding-inline: 8px;
  }

  .app-layout {
    grid-template-columns: 1fr;
    padding: 14px;
  }

  .toolbar,
  .guide-panel {
    position: static;
    max-height: none;
  }

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

  .panel-title-block,
  .primary-tool-section,
  .edit-section {
    grid-column: 1 / -1;
  }

  .toolbar-section {
    padding: 0;
    border-top: 0;
  }

  .guide-panel {
    grid-template-columns: 1fr 1fr;
  }

  .workspace-head {
    width: 100%;
  }

  #workspace {
    width: min(600px, calc(100vw - 46px));
    min-width: 0;
  }
}

@media (max-width: 560px) {
  .header-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .toolbar,
  .guide-panel {
    display: block;
  }

  .toolbar-section + .toolbar-section,
  .primary-tool-section + .toolbar-section {
    margin-top: 14px;
  }

  .guide-card + .guide-card {
    margin-top: 10px;
  }

  .workspace-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  .workspace-frame {
    padding: 9px;
  }

  .tool-grid,
  .edit-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

.workspace-head {
  display: none;
}

.toolbar-history {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
}

.toolbar-history .history-button {
  min-height: 32px;
  padding: 4px 6px;
  border-radius: var(--radius-sm);
  gap: 3px;
}

.toolbar-history .history-button .tool-icon {
  width: 16px;
  height: 16px;
  flex-basis: 16px;
}

.toolbar-history .history-button span {
  font-size: 0.68rem;
  line-height: 1;
}

.guide-panel {
  padding: 14px;
  box-sizing: border-box;
}

.guide-card {
  width: 100%;
  box-sizing: border-box;
  margin: 0;
}

.active-guide {
  padding: 16px 20px;
}

.guide-text,
#guide-text {
  max-width: none;
}

.guide-steps {
  margin: 12px 0 0;
  padding-left: 16px;
  padding-right: 0;
  max-width: none;
}

.guide-steps li {
  margin: 0 0 8px;
  padding-left: 2px;
  padding-right: 0;
  max-width: none;
}


.measure-button {
  min-height: 52px;
}


.measurement-editor {
  position: absolute;
  z-index: 8;
  width: max-content;
  max-width: min(160px, calc(100% - 12px));
  transform: none;
}

.measurement-editor form {
  display: flex;
  align-items: center;
  gap: 3px;
  width: max-content;
  max-width: 100%;
  min-height: 28px;
  padding: 4px 6px;
  border: 1.4px solid #d59b1f;
  border-radius: 8px;
  background: #fff8db;
  box-shadow: 0 8px 18px rgb(15 23 42 / 18%);
}

.measurement-editor[data-kind="angle"] form {
  border-color: #3786c8;
  background: #edf7ff;
}

.measurement-editor input {
  flex: 0 0 5.4ch;
  width: 5.4ch;
  min-width: 0;
  border: 0;
  outline: none;
  color: #1f2937;
  background: transparent;
  font: 800 0.78rem "Liberation Sans", Arial, sans-serif;
  line-height: 1.1;
  text-align: right;
}

.measurement-editor[data-kind="angle"] input {
  flex-basis: 4.4ch;
  width: 4.4ch;
}

.measurement-editor input::-webkit-outer-spin-button,
.measurement-editor input::-webkit-inner-spin-button {
  margin: 0;
  appearance: none;
}

#measurement-unit-label {
  flex: 0 0 auto;
  color: #334155;
  font-size: 0.72rem;
  font-weight: 800;
  line-height: 1;
  white-space: nowrap;
}

.measurement-editor-error {
  display: none;
  flex: 0 0 100%;
  color: var(--danger-dark);
  font-size: 0.64rem;
  font-weight: 760;
  line-height: 1.15;
  text-align: center;
}

.measurement-editor.has-error form {
  flex-wrap: wrap;
  width: 132px;
}

.measurement-editor.has-error .measurement-editor-error {
  display: block;
}

.measurement-hit {
  cursor: pointer;
  fill: transparent;
  stroke: transparent;
  pointer-events: all;
}

.measurement-hit-length {
  stroke-width: 16;
  stroke-linecap: round;
  pointer-events: stroke;
}

.measurement-hit-length:hover,
.measurement-hit-length.active {
  stroke: rgb(213 155 31 / 62%);
}

.measurement-hit-angle {
  fill: rgb(55 134 200 / 38%);
  stroke: white;
  stroke-width: 2.2;
  vector-effect: non-scaling-stroke;
}

.measurement-hit-angle:hover,
.measurement-hit-angle.active {
  fill: rgb(55 134 200 / 78%);
  stroke: #1d5f98;
}

.measurement-control {
  cursor: pointer;
  pointer-events: all;
}

.measurement-label-bg {
  fill: #fff8db;
  stroke: #d59b1f;
  stroke-width: 1.2;
  filter: drop-shadow(0 2px 3px rgba(15, 23, 42, 0.16));
}

.measurement-angle .measurement-label-bg {
  fill: #edf7ff;
  stroke: #3786c8;
}

.measurement-info .measurement-label-bg {
  fill: #f1f5f9;
  stroke: #94a3b8;
}

.measurement-label-text {
  fill: #1f2937;
  font-family: "Liberation Sans", Arial, sans-serif;
  font-weight: 700;
  pointer-events: none;
  user-select: none;
}

.measurement-control:hover .measurement-label-bg {
  stroke-width: 2;
}


/* Rifinitura layout e feedback misure - v12 */
.app-header {
  padding: 14px 24px;
}

.header-content {
  width: 100%;
  max-width: none;
}

.brand-block h1 {
  font-size: clamp(1.46rem, 1.9vw, 1.94rem);
}

.brand-block p {
  font-size: 0.92rem;
}

.header-action {
  min-height: 42px;
  padding: 8px 13px;
  border-radius: 13px;
}

.app-layout {
  grid-template-columns: 252px minmax(0, 1fr) 252px;
  gap: 18px;
  width: 100%;
  padding: 14px 18px 24px;
}

.toolbar,
.guide-panel {
  top: 96px;
  margin-top: 28px;
  border-radius: 22px;
  background: rgb(255 255 255 / 95%);
  box-shadow: 0 14px 34px rgb(15 23 42 / 10%);
}

.toolbar {
  padding: 13px;
}

.guide-panel {
  padding: 13px;
  max-height: calc(100vh - 128px);
  scrollbar-gutter: auto !important;
}

.workspace-area {
  gap: 12px;
  overflow: visible;
  padding-top: 2px;
}

.workspace-edit-section {
  width: min(100%, 1080px);
  padding: 10px;
  border: 1px solid rgb(203 213 225 / 86%);
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgb(255 255 255 / 96%) 0%, rgb(248 250 252 / 96%) 100%);
  box-shadow: 0 12px 28px rgb(15 23 42 / 9%);
}

.workspace-edit-section .edit-grid {
  gap: 8px;
}

.workspace-edit-section .tool-button,
.workspace-edit-section .action-button {
  min-height: 42px;
  flex: 1 1 126px;
  padding: 8px 11px;
  border-radius: 13px;
  font-size: 0.78rem;
  background: #ffffff;
  box-shadow: inset 0 0 0 1px rgb(226 232 240 / 90%);
}

.workspace-edit-section .tool-button:hover,
.workspace-edit-section .action-button:hover {
  transform: translateY(-1px);
  box-shadow: inset 0 0 0 1px #cbd5e1, 0 8px 18px rgb(15 23 42 / 8%);
}

.workspace-frame {
  padding: 10px;
  border-radius: 24px;
  background: linear-gradient(180deg, #edf3fb 0%, #dce7f3 100%);
  box-shadow: 0 22px 52px rgb(15 23 42 / 13%);
}

#workspace {
  width: min(1120px, calc(100vw - 620px));
  min-width: 780px;
  border-radius: 16px;
  border-color: #b8c4d4;
  background:
    radial-gradient(circle, rgb(148 163 184 / 24%) 1px, transparent 1px),
    linear-gradient(180deg, #f6f8fb 0%, #e8eef6 100%);
  background-size: 20px 20px, auto;
}

#export-area {
  stroke: #334155;
  stroke-width: 1.8;
  filter: drop-shadow(0 12px 24px rgb(15 23 42 / 14%));
}

.guide-card {
  border-radius: 18px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.measure-button {
  color: #2852b6;
  background: #eef4ff !important;
  box-shadow: inset 0 0 0 1px rgb(56 103 214 / 16%) !important;
}

.measurement-control-target {
  cursor: pointer;
  pointer-events: all;
}

.measurement-length-hit {
  fill: none;
  stroke: transparent;
  stroke-width: 26;
  stroke-linecap: round;
  pointer-events: stroke;
}

.measurement-length-feedback {
  fill: none;
  stroke: transparent;
  stroke-width: 3.2;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
  filter: drop-shadow(0 2px 3px rgb(15 23 42 / 18%));
}

.measurement-length-target:hover .measurement-length-feedback,
.measurement-length-target.active .measurement-length-feedback {
  stroke: #f59e0b;
}

.measurement-length-target.active .measurement-length-feedback {
  stroke: #d97706;
  stroke-width: 4.1;
}

.measurement-angle-leader {
  fill: none;
  stroke: rgb(37 99 235 / 26%);
  stroke-width: 1.4;
  stroke-dasharray: 3 3;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
}

.measurement-angle-hit-area {
  fill: transparent;
  stroke: transparent;
  pointer-events: all;
}

.measurement-angle-ring {
  fill: #ffffff;
  stroke: #60a5fa;
  stroke-width: 1.8;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
  filter: drop-shadow(0 2px 4px rgb(15 23 42 / 18%));
}

.measurement-angle-dot {
  fill: #2563eb;
  pointer-events: none;
}

.measurement-angle-target:hover .measurement-angle-leader,
.measurement-angle-target.active .measurement-angle-leader {
  stroke: rgb(37 99 235 / 55%);
}

.measurement-angle-target:hover .measurement-angle-ring,
.measurement-angle-target.active .measurement-angle-ring {
  fill: #eff6ff;
  stroke: #1d4ed8;
  stroke-width: 2.4;
}

.measurement-angle-target:hover .measurement-angle-dot,
.measurement-angle-target.active .measurement-angle-dot {
  fill: #1e40af;
}

.measurement-editor form {
  border-radius: 10px;
  box-shadow: 0 10px 22px rgb(15 23 42 / 18%);
}

@media (min-width: 1560px) {
  .app-layout {
    grid-template-columns: 264px minmax(0, 1fr) 264px;
    gap: 22px;
    padding-inline: 22px;
  }

  #workspace {
    width: min(1180px, calc(100vw - 680px));
  }
}

@media (max-width: 1180px) {
  .toolbar,
  .guide-panel {
    margin-top: 0;
  }

  #workspace {
    width: min(800px, calc(100vw - 310px));
    min-width: 560px;
  }
}

@media (max-width: 860px) {
  .app-header {
    padding: 14px 16px;
  }

  #workspace {
    width: min(640px, calc(100vw - 46px));
    min-width: 0;
  }
}

/* Barra strumenti superiore fissa durante lo scorrimento - v13 */
.workspace-edit-section {
  position: sticky;
  top: 96px;
  z-index: 34;
  backdrop-filter: blur(14px);
}

.workspace-edit-section::after {
  content: "";
  position: absolute;
  inset: auto 14px -9px;
  height: 9px;
  border-radius: 0 0 999px 999px;
  background: linear-gradient(180deg, rgb(15 23 42 / 10%), transparent);
  opacity: 0;
  pointer-events: none;
}

.workspace-edit-section:is(:hover, :focus-within)::after {
  opacity: 1;
}

@media (max-width: 1180px) {
  .workspace-edit-section {
    top: 82px;
  }
}

@media (max-width: 860px) {
  .workspace-edit-section {
    top: 76px;
  }
}