/* style.css
 * Copyright (c) 2026 Cron AI Limited. All rights reserved.
 * Contact: info@cronai.ai, https://cronai.ai
 * Author(s): Robert de Temple (robert@cronai.ai)
 * Description: Responsive editor surfaces and accessible form styling.
 */

:root {
  /* Exact CRON AI 1.3 colours; neutrals use the permitted greys. */
  --ink: #09434f;
  --accent: var(--ink);
  --cyan: #10879d;
  --cyan-bright: #1ab2d1;
  --highlight: #fab000;
  --error: #e12727;
  --surface: #ffffff;
  --canvas: #eeeeee;
  --line: #cccccc;
  --muted: var(--ink);
  --control-font: 1rem;
  --compact-font: 12px;
  --compact-height: 28px;
  --control-radius: 5px;
  --popup-radius: 6px;
  --dialog-radius: 10px;
  --control-pad-y: 0.55rem;
  --control-pad-x: 0.75rem;
  --compact-pad-y: 4px;
  --compact-pad-x: 8px;
  --field-gap: 6px;
  --field-margin: 12px;
  --panel-padding: 16px;
  --selection-fill: var(--cyan-bright);
  --selection-ink: #000000;
  --control-chevron: url('/assets/chevron.svg');
  --popup-shadow: 0 4px 16px #09434f26;
  --cron-blues: linear-gradient(
    0deg in srgb-linear, #10879d, #09434f
  );
  font-family: Arial, sans-serif;
  color: var(--ink);
  background: var(--canvas);
  font-size: 14px;
}

* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
/* Keep scroll tracks and thumbs visible on every scrollable surface. */
::-webkit-scrollbar {
  width: 12px;
  height: 12px;
  background: var(--canvas);
}
::-webkit-scrollbar-track { background: var(--canvas); }
::-webkit-scrollbar-thumb {
  background: var(--ink);
  border: 2px solid var(--canvas);
  border-radius: 8px;
}
::-webkit-scrollbar-thumb:hover { background: var(--cyan); }
::-webkit-scrollbar-corner { background: var(--canvas); }
@supports not selector(::-webkit-scrollbar) {
  * { scrollbar-color: var(--ink) var(--canvas); }
}

/* Provider links and browser text selection use the same UI palette. */
a,
a:visited {
  color: var(--ink);
}
::selection {
  background: var(--selection-fill);
  color: var(--selection-ink);
}
[hidden] {
  display: none !important;
}
button,
input,
select,
textarea {
  font: inherit;
  font-size: var(--control-font);
  line-height: 1.4;
}
button {
  padding: var(--control-pad-y) var(--control-pad-x);
  border: 1px solid var(--line);
  background: white;
  color: inherit;
  border-radius: var(--control-radius);
  cursor: pointer;
  white-space: nowrap;
}
button:hover {
  background: var(--canvas);
  border-color: var(--line);
}
button:disabled {
  opacity: 0.45;
  cursor: default;
}
/* View controls use the same selected colour as tool buttons. */
button:is(#top-view, #reset-view, #fullscreen,
  #fov-enabled)[aria-pressed='true'],
button.active,
.primary {
  background: var(--accent);
  color: white;
}
.primary:hover {
  background: var(--ink);
  border-color: var(--cyan-bright);
}
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}
input,
select,
textarea {
  min-width: 0;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--control-radius);
  padding: var(--control-pad-y) var(--control-pad-x);
  background: var(--canvas);
  color: var(--ink);
}
/* Native and searchable selectors share the same field and chevron. */
select {
  appearance: none;
  padding-right: calc(var(--control-pad-x) + 20px);
  background-image: var(--control-chevron);
  background-position: right var(--control-pad-x) center;
  background-size: 12px 12px;
  background-repeat: no-repeat;
}
:is(input, select, textarea):disabled {
  opacity: 0.45;
  cursor: default;
}
select:hover:not(:disabled), .entry-trigger:hover:not(:disabled) {
  border-color: var(--cyan);
}
summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  list-style: none;
  cursor: pointer;
}
summary::-webkit-details-marker { display: none; }
summary::after, .entry-trigger::after {
  content: '';
  flex: 0 0 12px;
  width: 12px;
  height: 12px;
  background: currentColor;
  mask: var(--control-chevron) center / contain no-repeat;
}
/* Section disclosures rotate the same chevron to reflect expansion. */
details:not(.tool-settings):not(.viewport-menu) > summary::after {
  transform: rotate(-90deg);
}
details[open]:not(.tool-settings):not(.viewport-menu) > summary::after {
  transform: none;
}
input[type='checkbox'],
input[type='radio'] {
  width: auto;
  accent-color: var(--accent);
}
input[type='color'] {
  height: 36px;
  padding: 3px;
}
input[type='range'] {
  padding: 0;
  accent-color: var(--accent);
}
label {
  display: grid;
  gap: var(--field-gap);
  margin-bottom: var(--field-margin);
}
h1,
h2,
h3,
p {
  margin-top: 0;
}
h2 {
  font-size: 1rem;
  font-weight: 650;
  margin-bottom: 0;
}
h3 {
  font-size: 1rem;
  margin: 16px 0 8px;
}
p {
  line-height: 1.5;
}
.muted {
  color: var(--muted);
  font-size: var(--compact-font);
}
.row {
  display: flex;
  gap: 8px;
  margin-bottom: var(--field-margin);
}
.row > * {
  flex: 1;
  min-width: 0;
}
/* Action tints belong to side menus and deeper dialogs only. */
:is(aside, dialog, .settings-menu)
  button:is(.action-enable, .action-disable, .danger) {
  color: var(--ink);
}
:is(aside, dialog, .settings-menu) button.action-enable {
  background: #edf7ef;
  border-color: #a9cdb1;
}
:is(aside, dialog, .settings-menu)
  button.action-enable:hover:not(:disabled) {
  background: #dfeee3;
}
:is(aside, dialog, .settings-menu) button.action-disable {
  background: #fff3e7;
  border-color: #e2c09b;
}
:is(aside, dialog, .settings-menu)
  button.action-disable:hover:not(:disabled) {
  background: #ffe8d1;
}
:is(aside, dialog, .settings-menu) button.danger {
  background: #fbeeee;
  border-color: #dfb1b1;
}
:is(aside, dialog, .settings-menu) button.danger:hover:not(:disabled) {
  background: #f7dddd;
}
.login-shell {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  background: var(--cron-blues);
}
.login-card {
  width: min(390px, 90vw);
  padding: 2.6rem;
  background: white;
  border-radius: var(--dialog-radius);
  box-shadow: 0 25px 90px #0004;
}
.login-card h1 {
  font-size: 2rem;
  margin: 1rem 0 0.2rem;
}
.login-card > p {
  color: var(--muted);
  margin-bottom: 2rem;
}
.login-card button {
  width: 100%;
  margin-top: 0.6rem;
}
/* Reuse the official logo silhouette in the approved surface colour. */
.cron-logo {
  display: block;
  width: 148px;
  height: 32px;
  background: currentColor;
  mask: url("/assets/cron-ai.svg") center / contain no-repeat;
}
#modal .cron-logo {
  margin-bottom: 12px;
}
#login-error {
  color: var(--ink);
  margin: 1rem 0 0;
}
#workspace {
  height: 100dvh;
  display: flex;
  flex-direction: column;
}
header {
  min-height: 56px;
  padding: 10px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--cron-blues);
  color: #fff;
}
/* Keep the logo beside the product title so branding stays compact. */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  font-size: 1.05rem;
  font-weight: 700;
  min-width: 214px;
}
.brand .cron-logo {
  width: 111px;
  height: 24px;
  flex-shrink: 0;
}
.brand small {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  font-weight: 400;
  color: var(--surface);
  margin-top: 3px;
}
header button {
  background: #ffffff09;
  border-color: var(--cyan);
  color: white;
}
header button:hover {
  background: #ffffff18;
}
header nav {
  display: flex;
  gap: 5px;
  margin-left: auto;
}
#project-name {
  background: transparent;
  color: white;
  border-color: transparent;
  max-width: 250px;
  padding: var(--compact-pad-y) var(--compact-pad-x);
  font-weight: 600;
}
#save-state {
  white-space: nowrap;
  color: var(--line);
  font-size: var(--compact-font);
  line-height: 1.5rem;
  padding: 3px 7px;
  border-radius: 4px;
}
#save-state.unsaved {
  color: var(--surface);
  background: var(--error);
  font-size: 1rem;
  font-weight: 700;
}
.work-area {
  display: flex;
  min-height: 0;
  flex: 1;
}
aside {
  background: white;
  overflow-y: auto;
  flex-shrink: 0;
}
.left-panel {
  width: var(--sidebar-width, 25%);
  max-width: max(200px, calc(100% - 328px));
  container-type: inline-size;
  border-right: 1px solid var(--line);
}

.panel-heading {
  padding: var(--panel-padding);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.panel-heading h2 { min-width: 0; overflow-wrap: anywhere; }
.panel-heading button {
  font-size: var(--compact-font);
  padding: var(--compact-pad-y) var(--compact-pad-x);
  min-height: var(--compact-height);
}
.image-actions {
  padding: 0 16px 12px;
}
.image-actions button {
  width: 100%;
}
.layer-list {
  max-height: 35vh;
  overflow-y: auto;
  padding: 0 8px 12px;
}
.layer-list h3 {
  color: var(--muted);
  margin: 12px 8px 5px;
  font-size: var(--compact-font);
}
.layer-item {
  border: 0;
  border-radius: 4px;
  width: 100%;
  display: flex;
  gap: 9px;
  text-align: left;
  align-items: center;
  overflow: hidden;
  text-overflow: ellipsis;
}
.layer-item.active {
  color: var(--selection-ink);
  background: var(--selection-fill);
  box-shadow: inset 4px 0 var(--ink);
  font-weight: 700;
}
.layer-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0 8px;
  white-space: nowrap;
  cursor: pointer;
}
.layer-toggle input {
  width: auto;
  margin: 0;
}
.swatch {
  width: 8px;
  height: 8px;
  border-radius: 2px;
  flex-shrink: 0;
}
/* Balance section spacing so each tab clears its upper boundary. */
.scene-section {
  padding: 8px var(--panel-padding);
  border-top: 1px solid var(--line);
}
.scene-section .panel-heading {
  padding: 16px 0;
}
/* Keep standalone sidebar actions inside the section padding. */
.scene-section > button {
  max-width: 100%;
  white-space: normal;
}
.scene-section > :last-child { margin-bottom: 0; }
/* Move scene actions onto another row when the sidebar is narrow. */
.scene-section > .row {
  flex-wrap: wrap;
}
.scene-section > .row > button {
  flex: 1 0 auto;
}
.scene-section .primary,
progress {
  width: 100%;
}
progress {
  margin: 10px 0;
  accent-color: var(--accent);
}
#sim-status {
  margin: 10px 0 0;
}
#viewport {
  position: relative;
  flex: 1;
  min-width: 200px;
  overflow: hidden;
}
#viewport canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}
.view-top {
  position: absolute;
  z-index: 2;
  top: 14px;
  left: 14px;
  right: 14px;
  display: flex;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
  pointer-events: none;
}
.toolbar {
  display: flex;
  gap: 3px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #ffffffef;
  box-shadow: 0 4px 12px #09434f15;
  pointer-events: auto;
}
.toolbar button {
  padding: 0.45rem 0.55rem;
  border-color: transparent;
}

.view-bottom {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 12px;
  background: #ffffffd9;
  font-size: var(--compact-font);
  pointer-events: none;
}
.tool-settings {
  color: var(--ink);
  position: relative;
}
.tool-settings > summary {
  padding: var(--control-pad-y) var(--control-pad-x);
  border: 1px solid var(--line);
  border-radius: var(--control-radius);
  background: white;
  cursor: pointer;
}
/* Header menus share the toolbar colour and focus treatment. */
header .tool-settings > summary {
  color: var(--surface);
  background: #ffffff09;
  border-color: var(--cyan);
}
header .tool-settings > summary:hover {
  background: #ffffff18;
}
.settings-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  width: 270px;
  z-index: 30;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: var(--popup-radius);
  background: white;
  box-shadow: var(--popup-shadow);
}
.settings-menu label:has(input[type='checkbox']) {
  display: flex;
  align-items: center;
  gap: 8px;
}
/* Group Settings fields and leave room for complete option names. */
#tool-settings > .settings-menu {
  width: 360px;
  max-width: calc(100vw - 24px);
  padding: var(--panel-padding);
  display: grid;
  gap: 12px;
}
#tool-settings .settings-fields {
  display: grid;
  gap: 12px;
  min-width: 0;
}
#tool-settings .settings-fields + .settings-fields {
  border-top: 1px solid var(--line);
  padding-top: 12px;
}
#tool-settings .settings-fields > h3,
#tool-settings .settings-menu label,
#tool-settings .number-field { margin: 0; }
#tool-settings .number-control input {
  padding-inline: var(--control-pad-x);
}
#tool-settings .settings-gradient { display: grid; gap: 6px; }
#tool-settings #coverage-colours { display: grid; gap: 4px; }
#tool-settings #coverage-colours > details { margin: 0; }
#tool-settings #coverage-colours summary {
  padding: 6px 0;
  font-size: var(--control-font);
  min-height: 32px;
}
#tool-settings .settings-actions { gap: 8px; }
#tool-settings .admin-actions {
  margin: 0;
  border: 0;
  padding: 0;
}
/* Header action padding must not enlarge stacked number steppers. */
header .settings-menu .number-step { padding: 0; min-height: 0; }

#inspector {
  padding: 0 16px 20px;
}
#inspector .empty {
  color: var(--muted);
  line-height: 1.6;
  padding-top: 12px;
}
/* Property forms share gaps instead of accumulating field margins. */
:is(#inspector, .group-part-fields) {
  display: grid;
  align-content: start;
  gap: var(--field-margin);
}
:is(#inspector, .group-part-fields)
  :is(label, .number-field, .row, .entry-picker,
      .colour-selector, p, h3) {
  margin: 0;
}
:is(#inspector, .group-part-fields) .field-grid {
  gap: var(--field-margin) 10px;
}
:is(#inspector, .group-part-fields) .number-control {
  width: min(100%, 9rem);
}
:is(#inspector, .group-part-fields) .number-control input {
  padding-inline: var(--control-pad-x);
}
:is(#inspector, .group-part-fields) > button { text-align: left; }
:is(#inspector, .group-part-fields) .object-palette {
  margin: var(--field-gap) 0 0;
}
:is(.left-panel, .group-part-fields)
  label:has(> input[type='checkbox']) {
  display: flex;
  flex-direction: row-reverse;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
}
.inspector-panel > .panel-heading {
  padding: 12px var(--panel-padding);
}
.layer-list .layer-item {
  padding: var(--compact-pad-y) var(--compact-pad-x);
  min-height: var(--compact-height);
}

/* Unit references must not stretch neighbouring field heights. */
.field-grid {
  display: grid;
  align-items: start;
  grid-template-columns: 1fr 1fr;
  gap: 0 10px;
}
.field-grid label {
  min-width: 0;
}
.vertex-row {
  display: flex;
  gap: 5px;
  margin-bottom: 6px;
}
.vertex-row input {
  width: 45%;
}
table {
  border-collapse: collapse;
  width: 100%;
}
th,
td {
  padding: 7px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}
th {
  color: var(--muted);
  font-size: var(--compact-font);
  font-weight: 500;
}
dialog {
  border: 1px solid var(--line);
  border-radius: var(--dialog-radius);
  padding: 0;
  width: min(940px, 94vw);
  max-height: 88dvh;
  box-shadow: 0 25px 100px #0004;
  color: inherit;
}
dialog::backdrop {
  background: #09434f88;
}
.modal-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--panel-padding);
  border-bottom: 1px solid var(--line);
}
#modal-content {
  padding: var(--panel-padding);
  overflow: auto;
}
.zone {
  border: 1px solid var(--line);
  border-radius: var(--popup-radius);
  margin: 12px 0;
  padding: 12px;
}
.zone .field-grid {
  grid-template-columns: repeat(4, 1fr);
}

.file-row {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  align-items: center;
}
.file-row .file-info {
  flex: 1;
}
.file-row small {
  display: block;
  color: var(--muted);
  margin-top: 5px;
}
#toast {
  position: fixed;
  inset: auto auto 22px 50%;
  margin: 0;
  border: 0;
  transform: translateX(-50%);
  background: var(--ink);
  color: white;
  padding: 12px 20px;
  border-radius: var(--popup-radius);
  box-shadow: 0 4px 24px #0003;
  z-index: 10;
  max-width: 85vw;
}
#toast details {
  margin-top: 8px;
}
#toast pre {
  user-select: text;
  cursor: text;
  max-height: 30vh;
  overflow: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
#toast button {
  margin-top: 8px;
  color: var(--ink);
  background: #fff;
}
.error-message {
  color: var(--ink);
  border-left: 3px solid var(--error);
  padding-left: 8px;
  white-space: pre-wrap;
}
@media (max-width: 1250px) {
  header {
    flex-wrap: wrap;
  }
  .brand {
    min-width: 180px;
  }
  header nav {
    margin-left: 0;
  }
}
@media (max-width: 850px) {
  .zone .field-grid {
    grid-template-columns: 1fr 1fr;
  }
  header nav {
    flex-wrap: wrap;
  }
}

/* Keep provider credits readable above the ground viewport. */
#map-attribution {
  position: absolute;
  bottom: 32px;
  left: 10px;
  right: 10px;
  z-index: 3;
  max-height: 70px;
  overflow: auto;
  padding: 5px 8px;
  background: rgb(255 255 255 / 92%);
  font-size: 10px;
  color: var(--ink);
}

/* Keep one compact sidebar beside the full-height map in every view. */
.workflow-tabs {
  display: flex;
  flex-shrink: 0;
  gap: 8px;
  padding: 7px 16px;
  border-bottom: 1px solid var(--line);
  background: white;
}
.workflow-tabs [aria-selected='true'] {
  background: var(--accent);
  color: white;
}
.inspector-panel {
  border-top: 1px solid var(--line);
}

/* Keep measurement readouts legible without blocking map gestures. */
.measurement-labels {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.measurement-label {
  position: absolute;
  pointer-events: none;
  white-space: nowrap;
  padding: 4px 7px;
  border-radius: 4px;
  background: #ffffffed;
  color: var(--ink);
  font-size: var(--compact-font);
  z-index: 2;
}

/* Measure stays immediately left of the local scale above credits/status. */
.view-lower {
  position: absolute;
  left: 18px;
  right: 14px;
  z-index: 3;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 8px;
  pointer-events: none;
}
.view-lower > :is(.coverage-legend, .heatmap-legend) {
  margin-left: auto;
}
.ground-tools {
  order: -1;
  align-self: flex-end;
  margin-right: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 100%;
  pointer-events: none;
}
.ground-tools > button {
  flex: none;
  margin: 0;
  padding: 6px 8px;
  pointer-events: auto;
  font-size: var(--compact-font);
}
.map-scale {
  padding: 4px 7px;
  border-radius: 4px;
  color: var(--ink);
  background: #ffffffe6;
  font-size: var(--compact-font);
  text-align: center;
}
.map-scale-line {
  width: 120px;
  height: 6px;
  border: solid var(--ink);
  border-width: 0 2px 2px;
  box-sizing: border-box;
}

/* Isolate local part editing while retaining a large 3D workspace. */
#modal.group-dialog {
  width: 96vw;
  max-width: none;
  height: 92dvh;
}
.group-dialog #modal-content {
  height: calc(100% - 65px);
}
.group-editor {
  display: flex;
  height: 100%;
  min-height: 400px;
}
.group-sidebar {
  width: 280px;
  flex-shrink: 0;
  overflow: auto;
  padding: 12px;
}
.group-viewport {
  position: relative;
  flex: 1;
  min-width: 200px;
  overflow: hidden;
}
.group-tools {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.template-row {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.group-sidebar > .row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
}
.group-sidebar > .row button,
.group-library button {
  width: 100%;
  white-space: normal;
  overflow-wrap: anywhere;
}

.coverage-legend {
  max-width: 100%;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  padding: 8px 12px;
  background: #fffffff0;
  border-radius: var(--popup-radius);
  pointer-events: none;
  z-index: 2;
  font-size: var(--compact-font);
}
.coverage-legend i {
  display: inline-block;
  width: 9px;
  height: 9px;
  margin-right: 4px;
}
#coverage-status:empty {
  display: none;
}

.lane-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  margin-bottom: 12px;
}
/* Wrap lane actions inside the resizable workflow panel. */
.lane-actions button {
  min-width: 0;
  white-space: normal;
  overflow-wrap: anywhere;
}
.lane-label {
  position: absolute;
  padding: 2px 5px;
  background: #ffffffdf;
  border-radius: 3px;
  font-size: 11px;
  color: var(--ink);
  pointer-events: none;
  white-space: nowrap;
}

.lane-insert-label {
  transform: translate(-50%, -50%);
  padding: 0;
  background: transparent;
  color: var(--ink);
  font-size: var(--compact-font);
  font-weight: bold;
  line-height: 12px;
}

.lane-snap {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 8px;
}
.lane-snap input {
  width: auto;
}

/* Keep scene colour selection in one compact named palette. */
.colour-selector {
  margin-bottom: 16px;
}
.colour-caption {
  display: flex;
  align-items: center;
  gap: 8px;
}
/* Large labelled swatches remain legible on both dark and light colours. */
.object-palette {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
  margin: 8px 0 16px;
}
.object-colour {
  min-width: 0;
  min-height: 30px;
  padding: 0;
  border: 1px solid #0003;
  border-radius: var(--control-radius);
}
.object-colour[aria-pressed='true'] {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  box-shadow:
    inset 0 0 0 2px white,
    inset 0 0 0 3px var(--ink);
}
.object-colour:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 2px;
}
.object-colour.custom-colour {
  background: var(--surface);
  color: var(--ink);
  font-size: 1.1rem;
}

/* Keep spinner buttons compact without narrowing paired fields excessively. */
.number-field {
  display: grid;
  gap: var(--field-gap);
  margin-bottom: var(--field-margin);
  min-width: 0;
}
.number-field > label {
  margin: 0;
}
.number-control {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 20px;
  grid-template-rows: 1fr 1fr;
}
.number-control input {
  padding-inline: 4px;
  grid-row: 1 / 3;
  border-radius: var(--control-radius) 0 0 var(--control-radius);
}
.number-step {
  padding: 0;
  min-width: 0;
  line-height: 1;
  border-radius: 0 var(--control-radius) 0 0;
  touch-action: none;
  user-select: none;
}
.number-step:last-child {
  border-radius: 0 0 var(--control-radius) 0;
}

/* The heading glyph follows its pickable handle without intercepting the mouse. */
.rotation-label {
  position: absolute;
  width: 24px;
  height: 24px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--highlight);
  color: var(--ink);
  font-size: 21px;
  line-height: 19px;
  text-align: center;
  transform: translate(-50%, -50%);
  pointer-events: none;
  user-select: none;
}

/* Collection searches stay compact; long entry lists scroll independently. */
.entry-search {
  padding: 0.3rem 0.5rem;
  font-size: var(--control-font);
  min-height: 30px;
}
.entry-picker, .entry-browser {
  min-width: 0;
  width: 100%;
}
.entry-browser { margin: 6px 0; }
.entry-picker { margin: 0 0 var(--field-margin); }
.entry-picker > label { margin: 0 0 var(--field-gap); }
.entry-list {
  max-height: min(36dvh, 20rem);
  overflow-y: auto;
  scrollbar-gutter: stable;
  scrollbar-width: auto;
  margin-top: 4px;
}
.entry-list > button {
  display: block;
  width: 100%;
  text-align: left;
}
.entry-empty {
  margin: 4px 0;
  font-size: var(--compact-font);
}
.entry-list .file-info,
.entry-list strong {
  min-width: 0;
  overflow-wrap: anywhere;
}
.row:has(> .entry-picker) {
  align-items: flex-end;
}
.row > .entry-picker {
  flex: 2;
}
/* Explicit scrollbar styling keeps long lists discoverable on macOS. */
:is(
  .entry-list,
  .layer-list,
  #modal,
  select[size]
)::-webkit-scrollbar {
  width: 9px;
  height: 9px;
}
:is(
  .entry-list,
  .layer-list,
  #modal,
  select[size]
)::-webkit-scrollbar-track {
  background: var(--canvas);
}
:is(
  .entry-list,
  .layer-list,
  #modal,
  select[size]
)::-webkit-scrollbar-thumb {
  background: #999999;
  border-radius: var(--control-radius);
  border: 2px solid var(--canvas);
}
#layer-search {
  width: calc(100% - 32px);
  margin: 8px 16px;
}

/* Keep class frequency and passing permission together in compact rows. */
.traffic-class-table {
  display: grid;
  grid-template-columns: minmax(100px, 1fr) 100px 110px;
  align-items: center;
  gap: 5px 10px;
  margin-bottom: 16px;
}
.traffic-class-table label { margin: 0; }
.traffic-class-table input { margin: 0; }

.template-child { width: min(760px, 92vw); max-height: 90vh; overflow-y: auto; border: 1px solid var(--line); border-radius: var(--dialog-radius); padding: var(--panel-padding); }
.template-child::backdrop { background: #09434f66; }
.dialog-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}
.dialog-header h2 { min-width: 0; margin: 0; }
.dialog-close { flex-shrink: 0; }
.template-child pre { max-height: 240px; overflow: auto; font-size: var(--compact-font); white-space: pre-wrap; }
.template-child details { margin: 10px 0; }
.library-entry { border: 0;
  padding: var(--compact-pad-y) var(--compact-pad-x); }
.template-child.group-dialog { width: min(1400px, 96vw); }

.template-definition { display: grid; grid-template-columns: minmax(140px, 1fr) 1fr; gap: 4px 12px; margin: 8px 0 12px; font-size: var(--compact-font); }
.template-definition dt { color: var(--muted); text-transform: capitalize; }
.template-definition dd { margin: 0; overflow-wrap: anywhere; }
.template-child.group-dialog > .group-editor-content { height: 70vh; }

/* Compact drawing controls stay above the viewport without resizing it. */
.viewport-menu { position: relative; }
.viewport-menu > summary {
  display: flex; align-items: center; gap: 8px;
  list-style: none; cursor: pointer; color: var(--ink);
  background: var(--surface); border: 1px solid transparent;
  border-radius: var(--control-radius); font-weight: 400;
}
.viewport-menu[open] > summary,
.viewport-menu > summary:hover { background: var(--canvas); }
.viewport-menu-panel {
  position: absolute; right: 0; top: 100%; z-index: 30;
  width: 235px; max-height: 65vh; overflow-y: auto;
  background: white; border: 1px solid var(--line);
  border-radius: var(--popup-radius); padding: 8px; box-shadow: var(--popup-shadow);
}
.viewport-menu-panel label { display: flex; align-items: center; gap: 8px; margin-bottom: var(--field-margin); }
.viewport-menu-panel input { width: auto; margin: 0; }
.viewport-menu-panel p { font-size: var(--compact-font); margin: 8px 0 0; }

/* Heatmap controls and legend remain compact beside existing scene analysis. */
.heatmap-scene { display: flex; gap: 8px; align-items: center; }
.heatmap-scene input { width: auto; margin: 0; }
.heatmap-legend {
  max-width: 100%; flex-wrap: wrap;
  background: #ffffffe6; border-radius: var(--control-radius); padding: 8px;
  font-size: var(--compact-font); display: flex; gap: 12px;
}
.heatmap-legend[hidden] { display: none; }

/* Keep frequent actions compact and administration out of the main bar. */
header { gap: 8px; }
header button, header summary {
  font-size: var(--compact-font);
  padding: var(--compact-pad-y) var(--compact-pad-x);
  min-height: var(--compact-height);
}
header nav { display: flex; align-items: center; gap: 5px; }
.action-menu { width: 180px; display: grid; gap: 6px; }
.admin-actions { display: grid; gap: 6px; margin-top: 10px; }
.admin-actions:has(button:not([hidden])) { border-top: 1px solid var(--line); padding-top: 10px; }
.settings-menu { max-height: 75vh; overflow-y: auto; padding: 8px; }
.view-top { top: 8px; left: 8px; right: 8px; gap: 6px; }
.toolbar { align-items: center; gap: 4px; padding: 4px;
  flex-wrap: wrap; max-width: 100%; }
.toolbar button, .toolbar summary, .toolbar select {
  font-size: var(--compact-font);
  padding: var(--compact-pad-y) var(--compact-pad-x);
  min-height: var(--compact-height);
}
#fov-class-label { font-size: var(--compact-font);
  padding: var(--compact-pad-y) var(--compact-pad-x); }
.toolbar select {
  padding-right: calc(var(--compact-pad-x) + 20px);
}
#fov-menu .viewport-menu-panel { width: 150px; }
.viewport-menu-panel label:last-child { margin-bottom: 0; }
.history-button { display: grid; place-items: center; }
.history-button svg {
  width: 19px; height: 19px; fill: none; stroke: currentColor;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
}

.compact-actions button { padding: var(--compact-pad-y) var(--compact-pad-x);
  font-size: var(--compact-font);
  min-height: var(--compact-height); }
.scene-section > .panel-heading { padding: 0 0 8px; }
.wide-button { width: 100%; }
.overlay-layout { display: grid; grid-template-columns: minmax(150px, 0.7fr) minmax(220px, 1.3fr); gap: 16px; }
.overlay-layout .entry-list { max-height: 55vh; overflow-y: auto; }
.overlay-layout .entry-list > button:not([hidden]) { display: block; width: 100%; text-align: left; margin-bottom: 4px; overflow-wrap: anywhere; }
.compact-actions { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 10px; }
.overlay-fields { min-width: 0; }
@media (max-width: 700px) {
  .overlay-layout { grid-template-columns: 1fr; }
  .overlay-layout .entry-list { max-height: 160px; }
  header { flex-wrap: wrap; }
}

/* Pair related ground controls so the dialog fits without a tall form. */
.overlay-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 0 10px; align-content: start; }
.overlay-fields > .compact-actions,
.overlay-fields > .field-grid,
.overlay-fields > label:first-of-type,
.overlay-fields > label:has(select) { grid-column: 1 / -1; }
.overlay-fields > label:has(input[type='checkbox']) { display: flex; align-items: center; gap: 8px; }
.overlay-fields input[type='checkbox'] { width: auto; margin: 0; }
.overlay-fields > button { padding: var(--compact-pad-y) var(--compact-pad-x);
  font-size: var(--compact-font);
  min-height: var(--compact-height); }
#ground-area { display: grid; grid-template-columns: 1fr 1fr; gap: 0 12px; }
#ground-area > p, #ground-area > button { grid-column: 1 / -1; }

/* Header dropdown actions sit on light panels, unlike header actions. */
header .settings-menu button {
  font-size: var(--control-font);
  padding: var(--control-pad-y) var(--control-pad-x);
  color: var(--ink);
  background: white;
  border-color: var(--line);
}
header .settings-menu button:hover {
  background: var(--canvas);
  border-color: var(--line);
}
.metric-reference { display: block; color: var(--muted); font-size: var(--compact-font); margin-top: 2px; }


/* Keep the licence readable with an explicit decision below its scroll area. */
.eula-shell {
  max-width: 900px;
  margin: 3vh auto;
  padding: 24px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.eula-text {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font: inherit;
  line-height: 1.5;
  max-height: 55vh;
  overflow-y: auto;
  padding: var(--panel-padding);
  border: 1px solid var(--line);
}
.eula-consent, .eula-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
}
.eula-consent input { width: auto; }
.eula-actions { justify-content: flex-end; flex-wrap: wrap; }

.eula-record { overflow-wrap: anywhere; min-width: 0; }

/* Keep account actions compact beneath readable ownership/status details. */
.account-row { flex-wrap: wrap; gap: 8px; }
.account-row .file-info { flex-basis: 100%; min-width: 0; }

.account-toggle { display: flex; align-items: center; gap: 8px; }
.account-toggle input[type=checkbox] { width: auto; margin: 0; }

/* Keep administrator tables compact and usable on smaller screens. */
#modal.admin-console { width: min(1120px, 94vw); }
.admin-navigation { display: flex; gap: 6px; flex-wrap: wrap; align-items: end; margin-bottom: 12px; }
.admin-navigation button[aria-pressed="true"] { background: var(--ink); color: white; }
.admin-table-scroll, .admin-log-list { max-height: 52vh; overflow: auto; }
.admin-table { width: 100%; border-collapse: collapse; font-size: var(--compact-font); }
.admin-table th, .admin-table td { padding: 7px 10px; text-align: left; border-bottom: 1px solid var(--line); white-space: nowrap; }
.admin-table th { position: sticky; top: 0; background: var(--canvas); }
.admin-log { padding: 8px; border-bottom: 1px solid var(--line); overflow-wrap: anywhere; }
.admin-log.error { border-left: 3px solid var(--error); }
.admin-log.warning { border-left: 3px solid var(--highlight); }
.admin-metrics { font-variant-numeric: tabular-nums; }

/* Keep saved-file sharing and onboarding switches beside their captions. */
.project-flags { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 8px; }
.project-flags label { margin: 0; }

/* CRON3CC matches the shared visibility score palette. */
.score-legend {
  display: flex;
  justify-content: space-between;
  position: relative;
  min-width: 100px;
  padding-top: 14px;
}
.score-legend::before {
  content: '';
  position: absolute;
  inset: 0 0 auto;
  height: 10px;
  background: var(--score-gradient, linear-gradient(
    90deg in srgb-linear, #ff3b3b 0%, #fab000 50%, #1bc64f 100%
  ));
}

/* Preview the selected data gradient and keep colour groups compact. */
#heatmap-gradient-preview {
  height: 12px;
  border-radius: 3px;
}
#coverage-colours > details {
  margin: 8px 0;
}
#coverage-colours summary {
  cursor: pointer;
}

/* Keep a narrow resize edge and an always reachable collapse control. */
.sidebar-rail {
  position: relative;
  width: 8px;
  flex-shrink: 0;
  background: var(--surface);
  z-index: 3;
}
#sidebar-resize {
  position: absolute;
  inset: 0;
  cursor: col-resize;
  touch-action: none;
}
#sidebar-resize:hover,
#sidebar-resize:focus-visible {
  background: var(--line);
  outline: 1px solid var(--accent);
}
#sidebar-toggle {
  position: absolute;
  top: 8px;
  left: -8px;
  width: 24px;
  height: 28px;
  padding: 3px;
  background: var(--surface);
  color: var(--ink);
}
#sidebar-toggle svg {
  width: 16px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  transform: rotate(90deg);
}
.sidebar-collapsed #sidebar-toggle svg { transform: rotate(-90deg); }
.sidebar-collapsed .sidebar-rail { width: 24px; }
.sidebar-collapsed #sidebar-toggle { left: 0; }
.sidebar-dragging,
.sidebar-dragging * {
  cursor: col-resize !important;
  user-select: none;
}

/* Search belongs inside collection popups; fixed row browsers keep theirs. */
.entry-trigger {
  width: 100%;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.entry-trigger { background: var(--canvas); }
.entry-value {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.entry-popup {
  position: fixed;
  inset: auto;
  margin: 0;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: var(--popup-radius);
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--popup-shadow);
}
.entry-popup:popover-open { display: flex; flex-direction: column; }
.entry-options { overflow-y: auto; min-height: 0; }
.entry-popup button {
  display: block;
  width: 100%;
  text-align: left;
  flex-shrink: 0;
  border: 0;
  padding: var(--compact-pad-y) var(--compact-pad-x);
  background: var(--surface);
  color: var(--ink);
}
.entry-popup button:hover,
.entry-popup button:focus-visible { background: var(--canvas); }
.entry-popup button[aria-selected='true'], .library-entry.active {
  background: var(--selection-fill);
  color: var(--selection-ink);
  box-shadow: inset 4px 0 var(--ink);
}
.entry-option { white-space: normal; overflow-wrap: anywhere; }
.entry-search-action { font-weight: 700; }
.entry-popup .entry-search { margin: 4px 0; flex-shrink: 0; }

/* Shared policy controls, responsive triples and contained list entries. */
.interface-modes { display: flex; gap: 2px; }
.interface-modes button {
  padding: var(--compact-pad-y) var(--compact-pad-x);
  font-size: var(--compact-font);
  min-height: var(--compact-height);
}
.interface-modes [aria-pressed="true"] {
  background: var(--selection-fill);
  color: var(--selection-ink);
}
.workflow-tabs .incomplete { color: #a52530; }
/* Keep missing setup guidance contained within existing sidebar entries. */
.left-panel .setup-missing {
  border-left: 2px solid #a52530;
  padding-left: 8px;
}
.left-panel label.setup-missing,
.left-panel p.setup-missing,
.left-panel .number-field.setup-missing > label {
  color: #a52530;
}
.left-panel .setup-missing input { border-color: #a52530; }
.setup-hint:not(.setup-missing) { display: none; }

.field-triple {
  grid-template-columns: repeat(auto-fit, minmax(68px, 1fr));
}
.field-grid > *, .number-field, .number-control { min-width: 0; }
:is(#inspector, .group-part-fields) .field-triple {
  grid-template-columns: repeat(auto-fit, minmax(94px, 1fr));
}
@container (max-width: 250px) {
  #inspector .field-grid { grid-template-columns: minmax(0, 1fr); }
}

.entry-list > button, .layer-item {
  white-space: normal; overflow-wrap: anywhere; min-width: 0;
}


/* Keep the first header menu inside narrow wrapped toolbars. */
#file-menu .settings-menu {
  left: 0;
  right: auto;
}


/* Scroll Library fields between fixed navigation and action controls. */
.library-dialog {
  width: min(1100px, calc(100vw - 32px));
  max-width: calc(100vw - 24px);
  max-height: calc(100dvh - 24px);
  box-sizing: border-box;
  overflow: hidden;
}
.library-dialog[open] {
  display: flex;
  flex-direction: column;
}
.library-dialog > .dialog-header, .library-filters, .library-actions {
  flex-shrink: 0;
}
.library-filters {
  display: grid;
  grid-template-columns: 1fr 1fr 2fr auto;
  gap: 12px;
  align-items: end;
  margin-bottom: 16px;
}
.library-filters > label { margin-bottom: 0; }
.library-layout {
  display: grid;
  grid-template-columns: minmax(180px, 260px) minmax(0, 1fr);
  gap: 20px;
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  scrollbar-gutter: stable;
}
.library-browser, .library-editor, .library-payload {
  min-width: 0;
}
.library-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 65vh;
  overflow: auto;
}
.library-entry {
  text-align: left;
  white-space: normal;
  overflow-wrap: anywhere;
}
.library-editor textarea {
  min-height: 76px;
  resize: vertical;
}
.library-editor label, .library-filters label {
  min-width: 0;
}
.library-editor input, .library-editor select,
.library-editor textarea, .library-filters input,
.library-filters select {
  max-width: 100%;
  box-sizing: border-box;
}
.library-revisions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: end;
  margin: 14px 0;
}
.library-actions {
  background: var(--surface);
  padding: 10px 0;
  flex-wrap: wrap;
}
.exact-integer-steps {
  display: inline-flex;
  gap: 6px;
  margin-top: 4px;
}
@media (max-width: 700px) {
  .library-filters { grid-template-columns: 1fr 1fr; }
  .library-layout { grid-template-columns: 1fr; }
  .library-list { max-height: 180px; }
  .library-editor .field-grid { grid-template-columns: 1fr; }
  .library-dialog .traffic-class-table {
    grid-template-columns: minmax(70px, 1fr) minmax(70px, 1fr) auto;
  }
}


/* Selected definitions keep their overview beside the filtered list. */
.template-selection-dialog {
  width: min(940px, calc(100vw - 32px));
  height: min(760px, calc(100dvh - 24px));
  max-height: calc(100dvh - 24px);
  overflow: hidden;
}
.template-selection-dialog[open] {
  display: flex;
  flex-direction: column;
}
.template-selection-dialog .modal-heading { flex-shrink: 0; }
.template-selection-dialog #modal-content {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}
.template-selection-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.7fr);
  grid-template-rows: minmax(0, 1fr);
  gap: 16px;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  margin-bottom: 16px;
}
.template-selection-dialog .library-filters {
  grid-template-columns: minmax(120px, 1fr) minmax(0, 2fr);
}
/* Scroll each pane independently without moving its neighbour. */
.template-overview {
  min-width: 0;
  min-height: 0;
  overflow: auto;
  overflow-wrap: anywhere;
  scrollbar-gutter: stable;
  padding: 2px;
}
.structure-thumbnail {
  width: 100%; height: auto; max-height: 260px;
  object-fit: contain;
}
.template-selection-dialog .library-list {
  min-height: 0;
  max-height: none;
  overflow: auto;
  scrollbar-gutter: stable;
  gap: 2px;
  padding: 2px;
}
/* Use compact list rows rather than large action buttons. */
.template-selection-dialog .library-entry {
  flex: 0 0 auto;
  border-radius: var(--control-radius);
}
.setup-guidance { color: #a52530; }
.scene-section .row { flex-wrap: wrap; }
#result-loading { color: var(--cyan); }
@media (max-width: 680px) {
  .library-layout {
    grid-template-columns: minmax(0, 1fr);
  }
  .library-filters { grid-template-columns: 1fr 1fr; }
  .library-list { max-height: 180px; }
  .group-editor { flex-direction: column; }
  .group-sidebar { width: 100%; max-height: 34vh; }
  .group-viewport { min-height: 300px; }
}

.import-image-preview {
  display: block;
  max-width: 100%;
  max-height: 260px;
  object-fit: contain;
  margin: 0 auto 16px;
}

/* Compact seed controls share one row and action spacing stays readable. */
.traffic-seed-controls {
  display: flex;
  gap: 8px;
  align-items: end;
  margin-bottom: 12px;
}
.traffic-seed-controls label { flex: 1; min-width: 0; margin: 0; }
.traffic-seed-controls button { flex: 0 0 auto; }
.scene-section > button + button { margin-top: 6px; }
#modal-content > button { margin: 4px 6px 4px 0; }

/* Map is an inline workspace; all shared buttons contain their labels. */
button, summary, .entry-trigger {
  white-space: normal;
  overflow-wrap: anywhere;
  min-width: 0;
  max-width: 100%;
  box-sizing: border-box;
}
.map-control-section { border-bottom: 1px solid var(--line); }
.map-control-section > summary {
  padding: 12px 0;
  font-weight: 600;
  cursor: pointer;
}
.map-control-fields { padding-bottom: 14px; }
.map-control-fields > button { width: 100%; margin: 4px 0; }
.map-control-fields .overlay-layout { display: block; }
.map-control-fields .compact-actions { flex-wrap: wrap; }
.map-control-fields .entry-list { max-height: 180px; overflow: auto; }
.map-control-fields p { overflow-wrap: anywhere; }
.map-control-fields input[type='file'] { width: 100%; min-width: 0; }

/* Use Map's wider panel for paired coordinates and layer browsing. */
@container (min-width: 480px) {
  [data-map-section='origin'] > .map-control-fields {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 12px;
  }
  [data-map-section='origin'] > .map-control-fields > * {
    grid-column: 1 / -1;
  }
  [data-map-section='origin'] > .map-control-fields
    > :has(input[data-quantity='geographic_coordinate']) {
    grid-column: auto;
  }
  .map-control-fields .overlay-layout {
    display: grid;
    grid-template-columns: minmax(120px, .7fr) minmax(0, 1.3fr);
    gap: 12px;
  }
}

/* The collapse handle intentionally bridges its narrow resize rail. */
#sidebar-toggle { max-width: none; }


/* Keep guide topics, photographs and readable legends contained. */
.help-dialog[open] {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: min(1240px, calc(100vw - 24px));
  height: min(900px, calc(100dvh - 24px));
  max-height: calc(100dvh - 24px);
  padding: var(--panel-padding);
  overflow: hidden;
}
.help-toolbar {
  display: flex; flex-wrap: wrap; gap: 10px 16px;
  align-items: center;
}
.help-toolbar label { margin: 0; flex: 0 1 180px; min-width: 130px; }
.help-toolbar h3 { margin: 0; flex: 1 1 160px; }
.help-figure {
  position: relative; flex: 1; min-height: 0; margin: 0;
  container-type: size; display: grid; place-items: center;
}
.help-scene {
  position: relative;
  width: min(100cqw, calc(100cqh * 1280 / 900));
  aspect-ratio: 1280 / 900;
}
.help-photo { position: absolute; inset: 0; }
.help-photo img, .help-photo svg {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: contain;
}
.help-photo svg { pointer-events: none; }
.help-photo path {
  fill: none; stroke: var(--ink); stroke-width: 2;
  vector-effect: non-scaling-stroke;
  filter: drop-shadow(0 0 2px white);
}
.help-photo circle { fill: var(--ink); stroke: white; stroke-width: 2; }
.help-photo text {
  fill: white; text-anchor: middle; dominant-baseline: middle;
  font: bold 24px Arial, sans-serif;
}
.help-legend {
  position: absolute; padding: 10px;
  left: var(--legend-left); top: var(--legend-top);
  width: var(--legend-width);
  background: #fffffff5; border: 1px solid var(--ink);
  border-radius: var(--popup-radius); box-shadow: 0 2px 10px #09434f25;
  font-size: 15px; line-height: 1.35;
}
.help-captions {
  display: grid; gap: 6px; margin: 0; padding: 0; list-style: none;
}
.help-legend[data-columns='2'] .help-captions {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.help-captions li {
  display: grid; grid-template-columns: 22px minmax(0, 1fr);
  gap: 8px; align-items: start;
}
.help-note-number {
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--ink); color: white; text-align: center;
  font-weight: bold; line-height: 22px;
}
.help-actions {
  flex-wrap: wrap; align-items: center; margin: 0;
}
.help-actions button {
  flex: 0 0 auto; min-width: 36px; padding: 6px 10px;
}
.help-actions span { flex: 1; text-align: center; }
.help-toolbar, .help-actions,
.help-dialog > .dialog-header { flex-shrink: 0; }
/* Put the boxed steps above the photograph when overlay space is scarce. */
@media (max-width: 900px), (max-height: 650px) {
  .help-figure { display: block; container-type: normal; overflow: auto; }
  .help-scene {
    display: flex; flex-direction: column; gap: 12px;
    width: 100%; aspect-ratio: auto;
  }
  .help-photo {
    position: relative; inset: auto; order: 1;
    aspect-ratio: 1280 / 900; width: 100%; flex-shrink: 0;
  }
  .help-legend { position: static; width: 100%; }
  .help-captions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 560px) {
  .help-captions, .help-legend[data-columns='2'] .help-captions {
    grid-template-columns: minmax(0, 1fr);
  }
}

.help-actions > button { width: 36px; height: 36px; }
.help-actions > button::before {
  content: '';
  display: block;
  width: 12px;
  height: 12px;
  margin: auto;
  background: currentColor;
  mask: var(--control-chevron) center / contain no-repeat;
}
.help-actions > button[aria-label='Previous']::before {
  transform: rotate(90deg);
}
.help-actions > button[aria-label='Next']::before {
  transform: rotate(-90deg);
}