@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@500;600;700&display=swap");

:root {
  color-scheme: light;
  --vd-green-50: #edf9f3;
  --vd-green-100: #e7f6ee;
  --vd-green-150: #cfecdd;
  --vd-green-500: #28ab67;
  --vd-green-600: #1f9559;
  --vd-green-900: #183621;
  --vd-ink: #272727;
  --vd-muted: #7a7a7a;
  --vd-muted-2: #a6a6a6;
  --vd-line: #e9e9e9;
  --vd-surface: #ffffff;
  --vd-surface-2: #eff2f0;
  --vd-surface-3: #eaedeb;
  --vd-radius-sm: 8px;
  --vd-radius-md: 10px;
  --vd-radius-lg: 12px;
  --vd-radius-pill: 999px;
  --vd-font-sans: "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --vd-font-alt: "Plus Jakarta Sans", "Inter", sans-serif;
  --vd-bg-app-gradient:
    linear-gradient(rgba(205, 255, 229, 0.05) 0%, rgba(255, 255, 255, 0.012) 39%, rgba(255, 255, 255, 0.05) 100%),
    linear-gradient(rgb(206, 214, 210) 0%, rgb(234, 237, 235) 10%, rgb(255, 255, 255) 20%, rgb(255, 255, 255) 100%);

  --bg: #f3f6f4;
  --panel: rgba(255, 255, 255, 0.82);
  --panel-solid: #ffffff;
  --panel-2: rgba(239, 242, 240, 0.94);
  --text: var(--vd-ink);
  --muted: var(--vd-muted);
  --line: rgba(24, 54, 33, 0.12);
  --accent: var(--vd-green-500);
  --accent-2: #109e8f;
  --danger: #d9534a;
  --road: #dbe3df;
  --accent-600: var(--vd-green-600);
  --gap: 16px;
  --panel-bg: rgba(255, 255, 255, 0.82);
  --panel-line: rgba(255, 255, 255, 0.7);
  --panel-blur: blur(18px) saturate(1.15);
  --panel-radius: 14px;
  --panel-shadow: 0 1px 2px rgba(24, 54, 33, 0.08), 0 18px 44px -26px rgba(24, 54, 33, 0.5);
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: var(--vd-font-sans);
  color: var(--vd-ink);
  background: var(--vd-bg-app-gradient);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button,
input,
select {
  font: inherit;
}

button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  border: 1px solid transparent;
  border-radius: var(--vd-radius-lg);
  color: var(--vd-ink);
  background: var(--vd-surface-2);
  text-align: center;
  cursor: pointer;
}

button:hover {
  background: #e6ebe8;
}

.icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.button-icon,
.head-icon,
.chev {
  width: 17px;
  height: 17px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.app-shell {
  position: fixed;
  inset: 0;
  overflow: hidden;
  background: var(--vd-bg-app-gradient);
}

.app-shell::before {
  content: "";
  position: fixed;
  z-index: 25;
  top: var(--gap);
  left: var(--gap);
  display: none;
  align-items: center;
  gap: 9px;
  height: 40px;
  padding: 0 16px 0 14px;
  border: 1px solid var(--panel-line);
  border-radius: var(--vd-radius-pill);
  background: var(--panel-bg);
  -webkit-backdrop-filter: var(--panel-blur);
  backdrop-filter: var(--panel-blur);
  box-shadow: var(--panel-shadow);
  color: var(--vd-green-900);
  font: 700 14px/1 var(--vd-font-alt);
  pointer-events: none;
}

.app-shell::after {
  content: "";
  display: none;
  position: fixed;
  z-index: 26;
  top: 31px;
  left: 30px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(40, 171, 103, 0.18);
  pointer-events: none;
}

.tab-panel {
  position: absolute;
  inset: 0;
  display: none;
}

.tab-panel.active {
  display: block;
}

.sim-panel,
.planner-panel {
  position: absolute;
  inset: 0;
  min-height: 100vh;
  overflow: hidden;
  background:
    linear-gradient(rgba(24, 54, 33, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(24, 54, 33, 0.05) 1px, transparent 1px),
    #e7ede9;
  background-size: 38px 38px;
}

#simCanvas,
#plannerCanvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100vh;
  cursor: grab;
  touch-action: none;
}

#simCanvas.is-panning,
#plannerCanvas.is-panning {
  cursor: grabbing;
}

#simCanvas.is-drawing,
#plannerCanvas.is-drawing {
  cursor: crosshair;
}

.app-tabs {
  position: fixed;
  z-index: 30;
  top: var(--gap);
  right: var(--gap);
  display: flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--panel-line);
  border-radius: var(--vd-radius-pill);
  background: var(--panel-bg);
  -webkit-backdrop-filter: var(--panel-blur);
  backdrop-filter: var(--panel-blur);
  box-shadow: var(--panel-shadow);
}

.tab-button {
  height: 38px;
  min-height: 38px;
  padding: 0 17px;
  border: none;
  border-radius: var(--vd-radius-pill);
  background: transparent;
  color: var(--vd-muted);
  font: 600 14px/1 var(--vd-font-sans);
  transition: background 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}

.tab-button:hover {
  color: var(--vd-ink);
  background: transparent;
}

.tab-button.active {
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 8px 18px -8px rgba(40, 171, 103, 0.8);
}

.hud,
.planner-hud {
  position: absolute;
  z-index: 15;
  top: 74px;
  left: var(--gap);
  width: 170px;
  max-width: none;
  transform: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  pointer-events: auto;
}

.hud {
  position: absolute;
  z-index: 15;
  top: var(--gap);
  left: 50%;
  width: auto;
  max-width: min(720px, calc(100vw - 32px));
  transform: translateX(-50%);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  pointer-events: auto;
}

.hud > div,
.planner-hud > div {
  min-width: 94px;
  padding: 8px 13px;
  border: 1px solid var(--panel-line);
  border-radius: var(--vd-radius-lg);
  background: var(--panel-bg);
  -webkit-backdrop-filter: var(--panel-blur);
  backdrop-filter: var(--panel-blur);
  box-shadow: var(--panel-shadow);
  pointer-events: none;
}

.hud span,
.planner-hud span,
.control-label span,
.spec-grid dt,
.eyebrow,
.planner-config span,
.planner-config-dialog span {
  display: block;
  color: var(--vd-muted);
  font: 600 10px/1 var(--vd-font-sans);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hud strong,
.planner-hud strong {
  display: block;
  margin-top: 6px;
  color: var(--vd-ink);
  font: 600 16px/1 var(--vd-font-sans);
}

.hud > div:nth-child(1) strong,
.hud > div:nth-child(2) strong,
.planner-hud > div:nth-child(3) strong,
.planner-hud > div:nth-child(4) strong {
  color: var(--accent);
}

.draggable-panel {
  user-select: none;
}

.draggable-panel.is-dragging {
  z-index: 60;
  outline: 1px solid rgba(40, 171, 103, 0.75);
  box-shadow: 0 22px 58px -26px rgba(24, 54, 33, 0.65);
}

.draggable-panel.is-custom-position {
  transform: none;
}

.draggable-panel[data-pin="left"],
.draggable-panel[data-pin="right"],
.draggable-panel[data-pin="bottom"] {
  outline: 1px solid rgba(40, 171, 103, 0.35);
}

.training-panel,
.cockpit,
.result-panel,
.planner-tools,
.planner-steps,
.planner-replay-panel,
.planner-save-dialog {
  position: absolute;
  z-index: 16;
  border: 1px solid var(--panel-line);
  border-radius: var(--panel-radius);
  background: var(--panel-bg);
  -webkit-backdrop-filter: var(--panel-blur);
  backdrop-filter: var(--panel-blur);
  box-shadow: var(--panel-shadow);
  color: var(--vd-ink);
}

.training-panel,
.planner-tools {
  top: 74px;
  left: var(--gap);
  width: min(348px, calc(100vw - 32px));
  display: grid;
  gap: 14px;
  padding: 14px;
}

.planner-tools {
  left: calc(var(--gap) + 188px);
  width: min(390px, calc(100vw - 32px));
}

.training-panel::before,
.planner-tools::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
}

.planner-panel-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
  cursor: move;
}

.planner-panel-header .eyebrow,
.training-panel .eyebrow {
  margin: 0;
}

.training-panel h1,
.planner-tools h1 {
  margin: 6px 0 0;
  color: var(--vd-ink);
  font: 700 20px/1.08 var(--vd-font-sans);
  letter-spacing: 0;
}

.training-panel p,
.planner-note {
  margin: 0;
  color: var(--vd-muted);
  font: 400 13px/1.4 var(--vd-font-sans);
}

.planner-tools.collapsed {
  width: auto;
  min-width: 54px;
}

.planner-tools.collapsed .planner-panel-header > div,
.planner-tools.collapsed > :not(.planner-panel-header) {
  display: none;
}

.planner-hud.collapsed {
  width: 62px;
  transform: none;
}

.planner-hud.collapsed > div {
  display: grid;
  min-width: 0;
  padding: 7px 6px;
  text-align: center;
}

.planner-hud.collapsed > div::before {
  content: attr(data-icon);
  display: block;
  margin-bottom: 4px;
  color: var(--vd-muted);
  font: 700 10px/1 var(--vd-font-sans);
}

.planner-hud.collapsed span {
  display: none;
}

.planner-hud.collapsed strong {
  margin-top: 0;
  overflow: hidden;
  color: var(--accent);
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.planner-tool-row,
.scenario-row,
.manual-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.planner-tool-row {
  display: none;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.scenario-button,
.gear-button,
.manual-button,
.planner-tool {
  min-height: 40px;
  padding: 0 12px;
  border: 1px solid transparent;
  border-radius: var(--vd-radius-sm);
  background: var(--vd-surface-2);
  color: var(--vd-ink);
  font: 600 13px/1 var(--vd-font-sans);
  letter-spacing: 0;
}

.scenario-button .button-icon,
.manual-button .button-icon,
.planner-tool .button-icon {
  width: 16px;
  height: 16px;
  color: var(--vd-muted);
}

.scenario-button:hover,
.gear-button:hover,
.manual-button:hover,
.planner-tool:hover {
  background: #e6ebe8;
}

.scenario-button.active,
.gear-button.active,
.manual-button.active,
.planner-tool.active {
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 8px 18px -10px rgba(40, 171, 103, 0.9);
}

.scenario-button.active .button-icon,
.manual-button.active .button-icon,
.planner-tool.active .button-icon {
  color: #ffffff;
}

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

.planner-config {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.config-grid label,
.planner-config label,
.planner-config-dialog label {
  display: grid;
  gap: 6px;
}

select,
.config-grid input,
.planner-config input,
.planner-config-dialog input,
.planner-save-name input {
  min-height: 40px;
  padding: 0 12px;
  border: 1px solid transparent;
  border-radius: var(--vd-radius-sm);
  background: var(--vd-surface-2);
  color: var(--vd-ink);
  font: 400 14px/1 var(--vd-font-sans);
  appearance: none;
}

select:focus,
.config-grid input:focus,
.planner-config input:focus,
.planner-config-dialog input:focus,
.planner-save-name input:focus {
  outline: none;
  border-color: var(--accent);
  background: #ffffff;
}

.manual-error {
  min-height: 16px;
  margin: 0;
  color: var(--danger);
  font: 400 12px/1.4 var(--vd-font-sans);
}

.button-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.button-row.single {
  grid-template-columns: 1fr;
}

.button-row button,
#newScenarioButton,
#resetButton,
#pauseButton,
#plannerRun,
#plannerReplay,
#plannerClear,
#plannerDemo,
#plannerMaze,
#plannerAdvanced,
#plannerMazeGenerate,
#plannerReset,
#plannerSaveLibrary,
#plannerSaveCurrent,
#plannerSaveRefresh {
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid transparent;
  border-radius: var(--vd-radius-lg);
  font: 600 14px/1 var(--vd-font-sans);
}

#newScenarioButton,
#plannerRun,
#plannerMazeGenerate,
#plannerSaveCurrent {
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 10px 22px -12px rgba(40, 171, 103, 0.9);
}

#newScenarioButton:hover,
#plannerRun:hover,
#plannerMazeGenerate:hover,
#plannerSaveCurrent:hover {
  background: var(--accent-600);
}

#resetButton,
#pauseButton,
#plannerReplay,
#plannerClear,
#plannerDemo,
#plannerMaze,
#plannerAdvanced,
#plannerReset,
#plannerSaveLibrary,
#plannerSaveRefresh {
  background: var(--vd-surface-2);
  color: var(--vd-ink);
}

code {
  color: var(--accent-600);
}

.spec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 0;
}

.spec-grid div {
  min-height: 70px;
  padding: 11px 12px;
  border: none;
  border-radius: var(--vd-radius-sm);
  background: var(--vd-green-50);
}

.spec-grid dd {
  margin: 8px 0 0;
  color: var(--vd-green-900);
  font: 700 16px/1 var(--vd-font-sans);
}

.cockpit {
  left: 50%;
  right: auto;
  bottom: var(--gap);
  width: min(720px, calc(100vw - 32px));
  transform: translateX(-50%);
  display: grid;
  grid-template-columns: minmax(150px, 0.75fr) minmax(230px, 1.2fr) minmax(122px, 0.55fr);
  gap: 20px;
  align-items: end;
  padding: 16px 18px;
}

.steering-module,
.pedal-module,
.gear-module {
  display: grid;
  gap: 8px;
}

.pedal-module {
  cursor: ns-resize;
}

.control-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

output,
.control-label output {
  color: var(--vd-ink);
  font: 700 14px/1 var(--vd-font-sans);
}

.steering-wheel {
  position: relative;
  justify-self: center;
  width: 66px;
  height: 66px;
  border: 7px solid #101315;
  border-radius: 50%;
  background:
    radial-gradient(circle at center, #2a3035 0 19%, transparent 20%),
    radial-gradient(circle at center, transparent 0 55%, rgba(255, 255, 255, 0.14) 56% 59%, transparent 60%),
    repeating-linear-gradient(115deg, #151819 0 3px, #24292d 3px 5px);
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.08), 0 12px 24px -14px rgba(0, 0, 0, 0.55);
  transition: transform 0.06s linear;
  cursor: ns-resize;
}

.wheel-hub,
.spoke {
  position: absolute;
  left: 50%;
  top: 50%;
  transform-origin: center;
}

.wheel-hub {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #303940;
  transform: translate(-50%, -50%);
}

.spoke {
  width: 7px;
  height: 26px;
  border-radius: 8px;
  background: #303940;
}

.spoke-top {
  transform: translate(-50%, -96%);
}

.spoke-left {
  transform: translate(-50%, -8%) rotate(122deg);
}

.spoke-right {
  transform: translate(-50%, -8%) rotate(-122deg);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  cursor: pointer;
}

.pedal-track {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) 56px;
  gap: 10px;
  align-items: center;
}

.pedal {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 40px;
  border: 1px solid transparent;
  border-radius: var(--vd-radius-sm);
  background: var(--vd-surface-2);
  color: var(--vd-ink);
  font: 600 13px/1 var(--vd-font-sans);
}

.pedal.brake {
  border-color: rgba(217, 83, 74, 0.4);
  color: var(--danger);
}

button.pedal.brake:hover {
  background: rgba(217, 83, 74, 0.1);
}

.pedal.gas {
  border-color: rgba(40, 171, 103, 0.45);
  color: var(--accent-600);
}

.scale-row {
  display: flex;
  justify-content: space-between;
  color: var(--vd-muted);
  font: 400 11px/1 var(--vd-font-sans);
}

.gear-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.gear-button {
  min-height: 40px;
  font-size: 16px;
}

.result-panel {
  top: 74px;
  right: var(--gap);
  width: min(310px, calc(100vw - 32px));
  display: none;
  gap: 14px;
  padding: 18px;
  overflow: hidden;
}

.result-panel.show {
  display: grid;
}

.result-panel::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  border-radius: var(--panel-radius) 0 0 var(--panel-radius);
  background: var(--accent);
}

.result-panel h2 {
  margin: 2px 0;
  color: var(--accent);
  font: 800 30px/1 var(--vd-font-sans);
}

.result-panel p {
  margin: 0;
  color: var(--vd-muted);
  font: 400 14px/1.45 var(--vd-font-sans);
}

.planner-steps {
  right: var(--gap);
  bottom: 142px;
  width: min(340px, calc(100vw - 32px));
  max-height: min(46vh, 420px);
  overflow: auto;
  padding: 14px;
}

.planner-steps.collapsed {
  width: auto;
  max-height: none;
  overflow: visible;
}

.planner-steps.collapsed .planner-steps-header .eyebrow,
.planner-steps.collapsed .planner-solution-list,
.planner-steps.collapsed ol {
  display: none;
}

.planner-steps-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: move;
}

.panel-toggle {
  width: 34px;
  min-height: 34px;
  padding: 0;
  border-radius: var(--vd-radius-pill);
}

.panel-toggle-floating {
  justify-self: start;
}

.planner-steps ol {
  display: grid;
  gap: 6px;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.planner-solution-list {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.planner-solution-item {
  display: grid;
  gap: 4px;
  min-height: 0;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: var(--vd-radius-sm);
  background: var(--vd-surface-2);
  color: var(--vd-ink);
  text-align: left;
}

.planner-solution-item strong {
  font: 700 13px/1.15 var(--vd-font-sans);
}

.planner-solution-item span {
  color: var(--vd-muted);
  font: 500 12px/1.2 var(--vd-font-sans);
}

.planner-solution-item.active {
  border-color: rgba(40, 171, 103, 0.45);
  background: rgba(40, 171, 103, 0.12);
}

.planner-steps li {
  position: relative;
  padding: 9px 12px 9px 38px;
  border-radius: var(--vd-radius-sm);
  background: var(--vd-surface-2);
  color: var(--vd-ink);
  font: 400 13px/1.35 var(--vd-font-sans);
  counter-increment: step;
}

.planner-steps li::before {
  content: counter(step);
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: #ffffff;
  font: 700 11px/1 var(--vd-font-sans);
}

.planner-hud,
.planner-replay-panel {
  cursor: move;
}

.planner-hud button,
.planner-replay-panel button,
.planner-replay-panel input,
.planner-replay-panel .planner-replay-wheel,
.planner-replay-panel .planner-drive-arrows,
.planner-replay-panel .planner-replay-readouts {
  cursor: default;
}

.planner-replay-panel {
  left: 50%;
  bottom: var(--gap);
  width: min(760px, calc(100vw - 32px));
  min-height: 106px;
  transform: translateX(-50%);
  display: grid;
  grid-template-columns: 122px 58px minmax(300px, 420px);
  justify-content: center;
  align-items: center;
  gap: 14px;
  padding: 10px 48px 10px 16px;
}

.planner-replay-panel.collapsed {
  left: auto;
  right: var(--gap);
  bottom: var(--gap);
  width: auto;
  min-height: 0;
  transform: none;
  grid-template-columns: 1fr;
  padding: 10px;
}

.planner-replay-panel.collapsed > :not(.replay-panel-toggle) {
  display: none;
}

.replay-panel-toggle {
  position: absolute;
  top: 10px;
  right: 10px;
}

.planner-replay-wheel {
  position: relative;
  margin: 0 auto;
  width: 122px;
  height: 122px;
  border: 0;
  border-radius: 50%;
  overflow: visible;
  display: grid;
  place-items: center;
}

.wheel-face {
  position: relative;
  display: block;
  width: 104px;
  height: 104px;
  border: 12px solid #0b0d0e;
  border-radius: 50%;
  background:
    radial-gradient(circle at center, #4a5156 0 18%, #2a3035 19% 31%, transparent 32%),
    linear-gradient(90deg, transparent 0 20%, #24292d 21% 79%, transparent 80%),
    radial-gradient(circle at center, transparent 0 55%, rgba(255, 255, 255, 0.16) 56% 60%, transparent 61%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0) 42%),
    repeating-linear-gradient(115deg, #151819 0 3px, #24292d 3px 5px);
  box-shadow:
    inset 0 0 0 2px rgba(255, 255, 255, 0.08),
    inset 0 0 0 9px rgba(255, 255, 255, 0.04),
    0 14px 28px rgba(0, 0, 0, 0.35);
  transform: rotate(var(--wheel-rotation, 0deg));
  transition: transform 0.08s linear;
}

.wheel-turn-trace {
  position: absolute;
  inset: -18px;
  width: 158px;
  height: 158px;
  overflow: visible;
}

.wheel-turn-trace > path {
  fill: none;
  stroke: var(--accent);
  stroke-width: 3.2;
  stroke-linecap: round;
  marker-end: url(#wheelTraceArrow);
  filter: drop-shadow(0 0 7px rgba(40, 171, 103, 0.48));
}

.wheel-turn-trace marker path {
  fill: var(--accent);
}

.planner-replay-wheel::before {
  content: "";
  position: absolute;
  width: 0;
  height: 0;
}

.wheel-face::before,
.wheel-face::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.wheel-face::before {
  width: 34px;
  height: 34px;
  border: 2px solid rgba(255, 255, 255, 0.12);
  background: #252d32;
}

.wheel-face::after {
  width: 82px;
  height: 82px;
  border: 2px solid rgba(255, 255, 255, 0.08);
}

.planner-replay-wheel .wheel-hub {
  z-index: 2;
  width: 24px;
  height: 24px;
  background: #3d474f;
}

.planner-replay-wheel .spoke {
  z-index: 1;
  width: 11px;
  height: 40px;
  background: #3a444b;
}

.planner-replay-wheel .spoke-left {
  width: 42px;
  height: 16px;
  transform: translate(-95%, -50%) rotate(8deg);
}

.planner-replay-wheel .spoke-right {
  width: 42px;
  height: 16px;
  transform: translate(-5%, -50%) rotate(-8deg);
}

.planner-replay-wheel .spoke-bottom {
  transform: translate(-50%, 5%);
}

.wheel-marker {
  position: absolute;
  z-index: 3;
  left: 50%;
  top: -10px;
  width: 9px;
  height: 9px;
  border: 2px solid #180a08;
  border-radius: 50%;
  background: #d9534a;
  transform: translateX(-50%);
}

.planner-drive-arrows {
  position: static;
  width: 58px;
  transform: none;
  display: grid;
  grid-template-rows: 1fr 1fr;
  gap: 8px;
}

.drive-arrow {
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
  min-height: 42px;
  border: 1px solid transparent;
  border-radius: var(--vd-radius-sm);
  color: var(--accent-600);
  background: var(--vd-surface-2);
  font-size: 1.35rem;
  font-weight: 900;
  opacity: 0.42;
  box-shadow: none;
  isolation: isolate;
  transition: opacity 0.12s linear, box-shadow 0.12s linear, background 0.12s linear;
}

.drive-arrow::before {
  content: "";
  position: absolute;
  inset: 5px;
  opacity: 0;
  background: radial-gradient(circle at center, rgba(40, 171, 103, 0.95), rgba(40, 171, 103, 0.34) 54%, transparent 76%);
  filter: blur(2px);
  transition: opacity 0.12s linear;
}

.drive-arrow.active::before {
  opacity: var(--drive-intensity, 0.65);
}

.drive-arrow.active {
  opacity: 1;
  border-color: rgba(40, 171, 103, 0.75);
  background: rgba(40, 171, 103, 0.14);
  box-shadow: inset 0 0 16px rgba(40, 171, 103, 0.24), 0 0 20px rgba(40, 171, 103, 0.32);
}

.planner-replay-readouts {
  position: static;
  width: auto;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.planner-replay-readouts > div {
  min-height: 58px;
  padding: 10px;
  border: none;
  border-radius: var(--vd-radius-sm);
  background: var(--vd-green-50);
}

.planner-replay-readouts span {
  color: var(--vd-muted);
  font: 600 10px/1 var(--vd-font-sans);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.planner-replay-readouts strong {
  display: block;
  margin-top: 6px;
  color: var(--vd-green-900);
  font: 700 15px/1 var(--vd-font-sans);
}

.planner-replay-speed {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-right: 34px;
}

.planner-replay-speed > span {
  color: var(--vd-muted);
  font: 600 10px/1 var(--vd-font-sans);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.replay-speed-buttons {
  display: inline-flex;
  gap: 4px;
  padding: 3px;
  border-radius: var(--vd-radius-sm);
  background: var(--vd-surface-2);
}

.planner-replay-panel .replay-speed {
  min-width: 38px;
  padding: 5px 9px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--vd-ink);
  font: 700 12px/1 var(--vd-font-sans);
  cursor: pointer;
  box-shadow: none;
}

.planner-replay-panel .replay-speed:hover {
  background: var(--vd-green-50);
}

.planner-replay-panel .replay-speed.active {
  color: #fff;
  background: var(--accent);
  box-shadow: inset 0 0 0 1px rgba(40, 171, 103, 0.5);
}

.planner-replay-timeline {
  grid-column: 1 / -1;
  width: 100%;
  padding-right: 34px;
}

.planner-replay-timeline input {
  display: block;
  width: 100%;
  accent-color: var(--accent);
}

/* ---- Thử lái (manual test drive) ---- */
.planner-try-drive {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid rgba(40, 171, 103, 0.4);
  border-radius: var(--vd-radius-sm);
  background: var(--vd-green-50);
  cursor: pointer;
}

.planner-try-drive input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
}

.planner-try-drive-text {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--vd-green-900);
  font: 600 12px/1.3 var(--vd-font-sans);
}

.planner-try-drive.is-active {
  border-color: var(--accent);
  background: rgba(40, 171, 103, 0.18);
  box-shadow: inset 0 0 14px rgba(40, 171, 103, 0.18);
}

/* Manual drive panel reuses the replay panel layout but has no timeline */
.manual-drive-panel {
  grid-template-columns: 122px 58px minmax(260px, 380px);
  padding: 10px 16px;
  cursor: default;
}

.manual-drive-panel[hidden] {
  display: none;
}

/* Hide the replay control panel while test-driving to avoid overlap */
.planner-panel.manual-active .planner-replay-panel:not(.manual-drive-panel) {
  display: none;
}

.manual-drive-wheel {
  cursor: ns-resize;
}

.manual-drive-arrows .drive-arrow {
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  font-family: var(--vd-font-sans);
}

.manual-drive-arrows .drive-arrow:active {
  transform: translateY(1px);
}

.manual-win-card {
  justify-items: center;
  text-align: center;
  padding: 26px 24px;
}

.manual-win-badge {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  color: #fff;
  background: radial-gradient(circle at 35% 30%, #3fd089, var(--accent) 70%);
  box-shadow: 0 12px 28px -10px rgba(40, 171, 103, 0.7);
}

.manual-win-badge .button-icon {
  width: 30px;
  height: 30px;
}

.manual-win-card h2 {
  margin: 4px 0 0;
  color: var(--vd-green-900);
  font: 800 24px/1.1 var(--vd-font-sans);
}

.manual-win-card p:not(.eyebrow) {
  margin: 0;
  color: var(--vd-muted);
  font: 500 14px/1.4 var(--vd-font-sans);
}

.manual-win-card .button-row {
  margin-top: 6px;
}

/* ---- Menu chuột phải thêm chướng ngại vật ---- */
.planner-context-menu {
  position: fixed;
  z-index: 80;
  min-width: 190px;
  padding: 6px;
  border: 1px solid var(--panel-line);
  border-radius: var(--vd-radius-sm);
  background: rgba(255, 255, 255, 0.97);
  -webkit-backdrop-filter: var(--panel-blur);
  backdrop-filter: var(--panel-blur);
  box-shadow: 0 18px 44px -18px rgba(24, 54, 33, 0.6);
  display: grid;
  gap: 2px;
}

.planner-context-menu[hidden] {
  display: none;
}

.planner-context-title {
  margin: 2px 6px 4px;
  color: var(--vd-muted);
  font: 700 10px/1 var(--vd-font-sans);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.planner-context-menu button {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 9px 10px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--vd-ink);
  font: 600 13px/1 var(--vd-font-sans);
  text-align: left;
  cursor: pointer;
}

.planner-context-menu button:hover {
  background: var(--vd-green-50);
  color: var(--vd-green-900);
}

.planner-context-menu button .button-icon {
  color: var(--accent);
}

.planner-save-dialog {
  position: fixed;
  width: min(560px, calc(100vw - 28px));
  max-height: min(720px, calc(100vh - 28px));
  padding: 0;
  border: 1px solid var(--panel-line);
  border-radius: var(--panel-radius);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 28px 76px -34px rgba(24, 54, 33, 0.75);
}

.planner-save-dialog::backdrop {
  background: rgba(24, 54, 33, 0.24);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}

.planner-save-card {
  display: grid;
  gap: 14px;
  padding: 16px;
}

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

.planner-save-header .eyebrow {
  margin: 0;
}

.planner-save-header h2 {
  margin: 6px 0 0;
  color: var(--vd-ink);
  font: 700 20px/1.1 var(--vd-font-sans);
}

.planner-save-name {
  display: grid;
  gap: 6px;
}

.planner-save-list {
  display: grid;
  gap: 8px;
  max-height: 360px;
  overflow: auto;
}

.planner-save-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 8px;
  align-items: center;
  padding: 10px;
  border: none;
  border-radius: var(--vd-radius-sm);
  background: var(--vd-surface-2);
}

.planner-save-item strong {
  display: block;
  overflow: hidden;
  color: var(--vd-ink);
  font: 700 14px/1.2 var(--vd-font-sans);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.planner-save-item span {
  display: block;
  margin-top: 4px;
  color: var(--vd-muted);
  font: 400 12px/1.3 var(--vd-font-sans);
}

.planner-save-empty {
  margin: 0;
  color: var(--vd-muted);
  font: 400 14px/1.4 var(--vd-font-sans);
}

@media (max-width: 1000px) {
  body {
    overflow: auto;
  }

  #simCanvas,
  #plannerCanvas {
    height: 760px;
  }

  .sim-panel,
  .planner-panel {
    min-height: 1080px;
  }

  .app-shell::before,
  .app-shell::after {
    display: none;
  }

  .app-tabs {
    left: var(--gap);
    right: var(--gap);
    justify-content: center;
  }

  .hud {
    top: 64px;
    left: var(--gap);
    right: var(--gap);
    max-width: none;
    transform: none;
    justify-content: flex-start;
  }

  .planner-hud {
    top: 64px;
    left: var(--gap);
    right: auto;
    width: 170px;
    grid-template-columns: 1fr;
  }

  .training-panel,
  .planner-tools {
    top: 184px;
    left: var(--gap);
    width: min(390px, calc(100vw - 32px));
  }

  .cockpit {
    left: var(--gap);
    right: var(--gap);
    bottom: var(--gap);
    width: auto;
    transform: none;
    grid-template-columns: 1fr;
  }

  .result-panel {
    top: auto;
    right: var(--gap);
    bottom: 360px;
  }

  .planner-steps {
    left: var(--gap);
    right: var(--gap);
    width: auto;
    bottom: 158px;
  }

  .planner-replay-panel {
    left: 50%;
    right: auto;
    bottom: var(--gap);
    width: calc(100vw - 32px);
  }
}

@media (max-width: 560px) {
  :root {
    --gap: 10px;
  }

  .tab-button {
    padding: 0 11px;
    font-size: 12px;
  }

  .hud {
    top: 58px;
    grid-template-columns: 1fr 1fr;
  }

  .planner-hud {
    top: 58px;
  }

  .hud > div {
    min-width: calc(50% - 4px);
  }

  .training-panel,
  .planner-tools {
    top: 208px;
    width: calc(100vw - 20px);
  }

  .scenario-row,
  .config-grid,
  .manual-row,
  .planner-tool-row,
  .planner-config,
  .planner-config-dialog,
  .button-row,
  .spec-grid,
  .pedal-track {
    grid-template-columns: 1fr;
  }

  .planner-steps {
    bottom: 220px;
  }

  .planner-replay-panel {
    bottom: 10px;
    width: calc(100vw - 20px);
    display: grid;
    grid-template-columns: 1fr;
    padding-right: 16px;
  }

  .planner-drive-arrows,
  .planner-replay-readouts {
    position: static;
    width: auto;
    transform: none;
  }

  .planner-replay-readouts {
    grid-template-columns: 1fr;
  }

  .planner-replay-timeline {
    padding-right: 0;
  }

  .planner-save-item {
    grid-template-columns: 1fr;
  }
}