:root {
  /* boundaries 는 라이트를 기본 개성으로 두고, prefers-color-scheme 로 다크를 추가한다. */
  color-scheme: light dark;

  --experience-bg: #dfe9ec;
  --experience-ink: #111827;
  --experience-muted: #5f6b78;
  --experience-panel: rgba(255, 255, 255, 0.88);
  --experience-panel-solid: #ffffff;
  --experience-border: rgba(22, 31, 44, 0.16);
  --experience-border-strong: rgba(22, 31, 44, 0.28);
  --experience-control: rgba(255, 255, 255, 0.82);
  --experience-control-hover: #ffffff;
  --experience-blue: #0f72d8;
  --experience-accent-soft: rgba(15, 114, 216, 0.12);
  --experience-radius: 7px;
  --experience-shadow-sm: 0 4px 12px rgba(18, 28, 42, 0.10);
  --experience-shadow-md: 0 10px 26px rgba(18, 28, 42, 0.14);
  --experience-shadow-hud: 0 18px 60px rgba(18, 28, 42, 0.18);

  /* 유리 표면(툴팁/HUD 칩) */
  --experience-glass-strong: rgba(255, 255, 255, 0.94);
  --experience-glass-soft: rgba(255, 255, 255, 0.68);
  --experience-glass-faint: rgba(255, 255, 255, 0.62);

  /* 지도 표면 위 요소들의 테마 분기용 토큰.
     라이트에서는 흰색으로 밝히고, 다크에서는 어두운 잉크로 눌러 시인성을 맞춘다. */
  --experience-map-wash: rgba(255, 255, 255, 0.24);
  --experience-grid-line: rgba(42, 60, 78, 0.18);

  /* 백지도(원본) 레이어 */
  --experience-origin-fill: rgba(255, 255, 255, 0.16);
  --experience-origin-stroke: rgba(16, 24, 38, 0.42);
  --experience-origin-fill-selected: rgba(255, 255, 255, 0.22);
  --experience-origin-stroke-selected: rgba(16, 24, 38, 0.78);
  --experience-origin-fill-compare: rgba(255, 255, 255, 0.26);
  --experience-origin-stroke-compare: rgba(16, 24, 38, 0.86);

  /* 이동본 지역 채움: 베이스색을 어느 톤으로 섞을지(tint)와 외곽선 톤(edge) */
  --boundary-tint: white;
  --boundary-edge: black;
  --boundary-select-stroke: #101828;

  /* 채움 강도(라이트: 파스텔) */
  --boundary-fill-base: 48%;
  --boundary-fill-tint: 52%;
  --boundary-fill-moved: 64%;
  --boundary-fill-moved-tint: 36%;
  --boundary-fill-selected: 72%;
  --boundary-fill-selected-tint: 28%;
}

@media (prefers-color-scheme: dark) {
  :root {
    --experience-bg: #0e1013;
    --experience-ink: #f4f2ec;
    --experience-muted: rgba(244, 242, 236, 0.6);
    --experience-panel: rgba(20, 22, 20, 0.86);
    --experience-panel-solid: #16181a;
    --experience-border: rgba(244, 242, 236, 0.16);
    --experience-border-strong: rgba(244, 242, 236, 0.32);
    --experience-control: rgba(28, 30, 28, 0.82);
    --experience-control-hover: rgba(40, 43, 40, 0.94);
    --experience-blue: #4ea3ff;
    --experience-accent-soft: rgba(78, 163, 255, 0.16);
    --experience-shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.4);
    --experience-shadow-md: 0 10px 28px rgba(0, 0, 0, 0.46);
    --experience-shadow-hud: 0 18px 60px rgba(0, 0, 0, 0.5);

    --experience-glass-strong: rgba(28, 30, 28, 0.94);
    --experience-glass-soft: rgba(255, 255, 255, 0.08);
    --experience-glass-faint: rgba(255, 255, 255, 0.05);

    /* 지도 표면: 밝은 워시 대신 은은한 어두운 딥으로 눌러 대비를 확보 */
    --experience-map-wash: rgba(0, 0, 0, 0.28);
    --experience-grid-line: rgba(244, 242, 236, 0.1);

    /* 백지도(원본): 다크에서는 밝은 반투명 채움 + 선명한 라이트 외곽선으로 시인성 확보 */
    --experience-origin-fill: rgba(244, 242, 236, 0.06);
    --experience-origin-stroke: rgba(244, 242, 236, 0.42);
    --experience-origin-fill-selected: rgba(244, 242, 236, 0.12);
    --experience-origin-stroke-selected: rgba(244, 242, 236, 0.78);
    --experience-origin-fill-compare: rgba(244, 242, 236, 0.16);
    --experience-origin-stroke-compare: rgba(244, 242, 236, 0.9);

    /* 이동본 지역 채움: 파스텔(흰색 블렌드) 대신 채도를 유지한 선명한 색으로.
       tint 를 흰색 대신 밝은 잉크로 살짝만 섞고, base 비중을 높여 어두운 배경에서 또렷하게. */
    --boundary-tint: #f4f2ec;
    --boundary-edge: #05070a;
    --boundary-select-stroke: #f4f2ec;

    --boundary-fill-base: 72%;
    --boundary-fill-tint: 28%;
    --boundary-fill-moved: 84%;
    --boundary-fill-moved-tint: 16%;
    --boundary-fill-selected: 90%;
    --boundary-fill-selected-tint: 10%;
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overscroll-behavior: none;
}

body.experience-boundary-lab-body {
  overflow: hidden;
  background: var(--experience-bg);
  color: var(--experience-ink);
  font-family: var(--font-family), 'Noto Sans KR', sans-serif;
  letter-spacing: 0;
  touch-action: none;
}

.skip-link {
  position: fixed;
  left: 12px;
  top: 12px;
  z-index: 100;
  transform: translateY(-160%);
  padding: 8px 10px;
  border-radius: 6px;
  background: var(--experience-panel-solid);
  color: var(--experience-ink);
  font-size: 13px;
  font-weight: 700;
}

.skip-link:focus {
  transform: none;
}

.experience-boundary-lab,
.experience-map-stage,
.experience-map-svg {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100dvh;
}

.experience-boundary-lab {
  isolation: isolate;
}

.experience-map-stage {
  z-index: 1;
  overflow: hidden;
  cursor: grab;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}

.experience-map-stage.is-panning {
  cursor: grabbing;
}

.experience-map-stage.is-moving-boundary {
  cursor: move;
}

.experience-map-svg {
  display: block;
  background:
    linear-gradient(0deg, var(--experience-map-wash), var(--experience-map-wash)),
    var(--experience-bg);
}

.experience-grid-fill {
  fill: url(#boundaryLabGridPattern);
  opacity: 0.42;
  pointer-events: none;
}

.experience-grid-line {
  fill: none;
  stroke: var(--experience-grid-line);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.experience-origin-layer,
.experience-moving-layer {
  transform-box: fill-box;
}

.experience-origin-boundary {
  fill: var(--experience-origin-fill);
  stroke: var(--experience-origin-stroke);
  stroke-width: 1.1px;
  stroke-dasharray: 6 5;
  stroke-linejoin: round;
  stroke-linecap: round;
  pointer-events: none;
  vector-effect: non-scaling-stroke;
}

.experience-origin-boundary.is-selected {
  fill: var(--experience-origin-fill-selected);
  stroke: var(--experience-origin-stroke-selected);
  stroke-width: 2px;
}

.experience-origin-boundary.is-compare-target {
  fill: var(--experience-origin-fill-compare);
  stroke: var(--experience-origin-stroke-compare);
  stroke-width: 2.25px;
  stroke-dasharray: 2.2 2.2;
}

.experience-origin-boundary.is-similar-match {
  stroke: rgba(15, 114, 216, 0.92);
  stroke-width: 2.45px;
}

.experience-origin-boundary.is-subdivision {
  stroke-dasharray: 4 3;
}

.experience-boundary-moving {
  fill: color-mix(in srgb, var(--boundary-color, #0f72d8) var(--boundary-fill-base), var(--boundary-tint) var(--boundary-fill-tint));
  stroke: color-mix(in srgb, var(--boundary-color, #0f72d8) 78%, var(--boundary-edge) 22%);
  stroke-width: 1.05px;
  stroke-linejoin: round;
  stroke-linecap: round;
  cursor: grab;
  outline: none;
  pointer-events: visiblePainted;
  vector-effect: non-scaling-stroke;
  transition: fill 140ms ease, stroke 140ms ease, opacity 140ms ease;
}

.experience-boundary-moving.is-subdivision {
  stroke-width: 0.95px;
}

.experience-boundary-moving.is-moved {
  fill: color-mix(in srgb, var(--boundary-color, #0f72d8) var(--boundary-fill-moved), var(--boundary-tint) var(--boundary-fill-moved-tint));
}

.experience-boundary-moving:hover,
.experience-boundary-moving:focus,
.experience-boundary-moving.is-hovered {
  stroke-width: 2px;
}

.experience-boundary-moving.is-selected {
  fill: color-mix(in srgb, var(--boundary-color, #0f72d8) var(--boundary-fill-selected), var(--boundary-tint) var(--boundary-fill-selected-tint));
  stroke: var(--boundary-select-stroke);
  stroke-width: 2.7px;
}

.experience-boundary-moving.is-compare-target {
  stroke: var(--boundary-select-stroke);
  stroke-width: 2.3px;
}

.experience-boundary-moving.is-similar-match {
  stroke: var(--boundary-select-stroke);
  stroke-width: 2.7px;
  filter: drop-shadow(0 0 8px color-mix(in srgb, var(--boundary-color, #0f72d8) 72%, transparent));
  animation: experience-similar-pulse 1.2s ease-in-out 2;
}

@keyframes experience-similar-pulse {
  0%,
  100% {
    fill: color-mix(in srgb, var(--boundary-color, #0f72d8) 58%, var(--boundary-tint) 42%);
  }

  50% {
    fill: color-mix(in srgb, var(--boundary-color, #0f72d8) 78%, var(--boundary-tint) 22%);
  }
}

.experience-map-stage.is-moving-boundary .experience-boundary-moving.is-selected {
  cursor: grabbing;
}

.experience-loading,
.experience-hover-label,
.experience-topbar,
.experience-map-controls,
.experience-tool-controls,
.experience-hud {
  position: fixed;
  z-index: 5;
}

.experience-loading {
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  padding: 0 14px;
  border: 1px solid var(--experience-border);
  border-radius: 8px;
  background: var(--experience-panel-solid);
  color: var(--experience-ink);
  font-size: 14px;
  font-weight: 800;
  box-shadow: 0 10px 30px rgba(18, 28, 42, 0.10);
}

.experience-hover-label {
  left: 0;
  top: 0;
  transform: translate(12px, 12px);
  max-width: min(280px, calc(100vw - 24px));
  padding: 7px 9px;
  border: 1px solid var(--experience-border);
  border-radius: 7px;
  background: var(--experience-glass-strong);
  color: var(--experience-ink);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.35;
  pointer-events: none;
  box-shadow: 0 12px 30px rgba(18, 28, 42, 0.14);
}

.experience-map-controls,
.experience-tool-controls {
  display: flex;
  width: max-content;
  min-width: 0;
  gap: 0;
  overflow: hidden;
  border: 1px solid var(--experience-border);
  border-radius: var(--experience-radius);
  background: var(--experience-control);
  box-shadow: var(--experience-shadow-sm);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.experience-map-controls {
  top: max(16px, env(safe-area-inset-top));
  right: max(16px, env(safe-area-inset-right));
}

.experience-tool-controls {
  top: calc(max(16px, env(safe-area-inset-top)) + 56px);
  left: max(16px, env(safe-area-inset-left));
}

.experience-topbar {
  top: max(16px, env(safe-area-inset-top));
  left: max(16px, env(safe-area-inset-left));
  display: grid;
  grid-template-columns: 40px max-content;
  align-items: center;
  gap: 10px;
  padding: 6px;
  border: 1px solid var(--experience-border);
  border-radius: var(--experience-radius);
  background: var(--experience-panel);
  box-shadow: var(--experience-shadow-md);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.experience-brand {
  display: grid;
  min-width: 0;
  gap: 1px;
  padding-right: 8px;
}

.experience-brand strong {
  color: var(--experience-ink);
  font-size: 15px;
  font-weight: 900;
  line-height: 1.1;
  white-space: nowrap;
}

.experience-brand span {
  color: var(--experience-muted);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.15;
  white-space: nowrap;
}

.experience-icon-button {
  position: relative;
  display: inline-flex;
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid var(--experience-border);
  border-radius: var(--experience-radius);
  background: var(--experience-control);
  color: var(--experience-ink);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  box-shadow: var(--experience-shadow-sm);
  text-decoration: none;
  touch-action: manipulation;
  transition: background 140ms ease, border-color 140ms ease, transform 140ms ease, color 140ms ease;
}

.experience-map-controls .experience-icon-button,
.experience-tool-controls .experience-icon-button {
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.experience-map-controls .experience-icon-button + .experience-icon-button,
.experience-tool-controls .experience-icon-button + .experience-icon-button {
  border-left: 1px solid var(--experience-border);
}

.experience-icon-button .material-symbols-outlined {
  display: block;
  font-size: 21px;
  line-height: 1;
}

.experience-icon-button:hover,
.experience-icon-button:focus-visible {
  border-color: var(--experience-border-strong);
  background: var(--experience-control-hover);
  color: var(--experience-blue);
  outline: none;
}

.experience-icon-button:focus-visible {
  outline: 2px solid var(--experience-blue);
  outline-offset: 2px;
}

.experience-map-controls .experience-icon-button:hover,
.experience-map-controls .experience-icon-button:focus-visible,
.experience-tool-controls .experience-icon-button:hover,
.experience-tool-controls .experience-icon-button:focus-visible {
  background: var(--experience-accent-soft);
}

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

.experience-icon-button.is-active {
  border-color: color-mix(in srgb, var(--experience-blue) 64%, white 36%);
  background: var(--experience-accent-soft);
  color: var(--experience-blue);
}

.experience-map-controls .experience-icon-button.is-active,
.experience-tool-controls .experience-icon-button.is-active {
  border-color: transparent;
}

.experience-icon-button:disabled {
  cursor: default;
  opacity: 0.45;
}

.experience-hud {
  left: 50%;
  bottom: max(18px, env(safe-area-inset-bottom));
  display: grid;
  width: min(560px, calc(100vw - 32px));
  transform: translateX(-50%);
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--experience-border);
  border-radius: 8px;
  background: var(--experience-panel);
  box-shadow: var(--experience-shadow-hud);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.experience-hud-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) max-content;
  gap: 12px;
  align-items: center;
}

.experience-hud-head strong {
  min-width: 0;
  overflow: hidden;
  color: var(--experience-ink);
  font-size: 15px;
  font-weight: 900;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.experience-hud-head output {
  min-width: 28px;
  padding: 4px 7px;
  border: 1px solid var(--experience-border);
  border-radius: 999px;
  background: var(--experience-glass-soft);
  color: var(--experience-muted);
  font-family: var(--font-mono), monospace;
  font-size: 12px;
  font-weight: 800;
  line-height: 1.2;
  text-align: center;
}

.experience-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin: 0;
}

.experience-metrics div {
  min-width: 0;
  padding: 9px 10px;
  border: 1px solid var(--experience-border);
  border-radius: 7px;
  background: var(--experience-glass-faint);
}

.experience-metrics div:nth-child(4) {
  grid-column: 1 / -1;
}

.experience-metrics dt {
  margin: 0 0 4px;
  color: var(--experience-muted);
  font-size: 11px;
  font-weight: 800;
  line-height: 1.1;
}

.experience-metrics dd {
  min-width: 0;
  margin: 0;
  color: var(--experience-ink);
  font-family: var(--font-mono), monospace;
  font-size: 13px;
  font-weight: 800;
  line-height: 1.28;
  overflow-wrap: anywhere;
  white-space: normal;
  word-break: keep-all;
}

@media (prefers-reduced-motion: reduce) {
  .experience-boundary-moving {
    transition: none;
    animation: none;
  }
}

@media (max-width: 640px) {
  .experience-topbar {
    top: max(10px, env(safe-area-inset-top));
    left: max(10px, env(safe-area-inset-left));
    grid-template-columns: 38px max-content;
    gap: 8px;
    padding: 5px;
  }

  .experience-brand strong {
    font-size: 14px;
  }

  .experience-brand span {
    display: none;
  }

  .experience-map-controls,
  .experience-tool-controls {
    min-width: 0;
  }

  .experience-map-controls {
    top: max(10px, env(safe-area-inset-top));
    right: max(10px, env(safe-area-inset-right));
    flex-direction: row;
  }

  .experience-tool-controls {
    top: calc(max(10px, env(safe-area-inset-top)) + 54px);
    left: max(10px, env(safe-area-inset-left));
  }

  .experience-icon-button {
    width: 38px;
    height: 38px;
  }

  .experience-hud {
    bottom: 0;
    width: 100vw;
    padding: 10px 12px max(12px, env(safe-area-inset-bottom));
    border-right: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: 8px 8px 0 0;
  }

  .experience-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
  }

  .experience-metrics div:nth-child(n+3) {
    grid-column: 1 / -1;
  }

  .experience-metrics div {
    padding: 8px 7px;
  }

  .experience-metrics dd {
    font-size: 12px;
  }
}