:root {
  color-scheme: dark;
  font-family: Arial, Helvetica, sans-serif;
  --black: #000;
  --white: #fff;
  --grey: #a6a6a6;
  --line: rgba(255, 255, 255, 0.34);
  --panel: rgba(0, 0, 0, 0.86);
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--black);
  color: var(--white);
}

button,
select,
input {
  font: inherit;
}

button,
a,
select,
input[type="range"] {
  touch-action: manipulation;
}

#viewer,
#canvas-host,
#canvas-host canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

#canvas-host canvas {
  display: block;
  cursor: grab;
}

#canvas-host canvas:active {
  cursor: grabbing;
}

#empty-state {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 12px;
  padding: 24px;
  text-align: center;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  transition: opacity 180ms ease;
}

#empty-state.is-hidden {
  opacity: 0;
  visibility: hidden;
}

#empty-state h1 {
  margin: 0;
  font-size: clamp(30px, 5vw, 64px);
  font-weight: 400;
  letter-spacing: -0.04em;
}

#empty-state p {
  margin: 0;
  color: var(--grey);
}

#empty-state .button {
  pointer-events: auto;
  width: auto;
  min-width: 180px;
  margin-top: 8px;
}

.empty-mark {
  width: 96px;
  height: 96px;
  display: grid;
  place-items: center;
  border: 1px solid var(--white);
  border-radius: 50%;
  font-size: 22px;
}


.panorama-title {
  position: absolute;
  top: max(18px, env(safe-area-inset-top));
  left: 50%;
  z-index: 16;
  max-width: min(760px, calc(100vw - 48px));
  padding: 9px 13px;
  transform: translate(-50%, -8px);
  border: 1px solid rgba(255, 255, 255, 0.54);
  background: rgba(0, 0, 0, 0.72);
  color: var(--white);
  font-size: clamp(12px, 1.6vw, 17px);
  line-height: 1.25;
  text-align: center;
  letter-spacing: 0.035em;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  backdrop-filter: blur(10px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.panorama-title.is-visible {
  transform: translate(-50%, 0);
  opacity: 1;
  visibility: visible;
}

.viewer-navigation {
  position: absolute;
  right: max(18px, env(safe-area-inset-right));
  bottom: max(18px, env(safe-area-inset-bottom));
  z-index: 18;
  display: none;
  grid-template-columns: auto auto auto;
  border: 1px solid var(--white);
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
}

.viewer-navigation.is-visible {
  display: grid;
}

.viewer-navigation button {
  min-height: 42px;
  padding: 10px 13px;
  border: 0;
  border-right: 1px solid var(--white);
  border-radius: 0;
  background: transparent;
  color: var(--white);
  font: 11px Arial, Helvetica, sans-serif;
  letter-spacing: 0.08em;
  cursor: pointer;
}

.viewer-navigation button:last-child {
  border-right: 0;
}

.viewer-navigation button:hover:not(:disabled),
.viewer-navigation button:focus-visible {
  background: var(--white);
  color: var(--black);
}

.viewer-navigation button:disabled {
  cursor: default;
  opacity: 0.34;
}

#drop-overlay {
  position: absolute;
  inset: 18px;
  display: grid;
  place-items: center;
  z-index: 30;
  border: 1px dashed var(--white);
  background: rgba(0, 0, 0, 0.78);
  opacity: 0;
  visibility: hidden;
  transition: opacity 120ms ease;
  pointer-events: none;
}

#drop-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

#drop-overlay div {
  padding: 22px 28px;
  border: 1px solid var(--white);
  font-size: 14px;
  letter-spacing: 0.16em;
}

#menu {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 20;
  width: min(380px, calc(100vw - 20px));
  height: 100%;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: var(--panel);
  border-right: 1px solid var(--line);
  backdrop-filter: blur(14px);
  transition: transform 180ms ease;
}

#menu.is-hidden {
  transform: translateX(-100%);
}

.menu-header {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 22px;
  border-bottom: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.92);
}

.menu-header h2 {
  margin: 2px 0 0;
  font-size: 24px;
  font-weight: 400;
  letter-spacing: -0.03em;
}

.eyebrow {
  margin: 0;
  color: var(--grey);
  font-size: 10px;
  letter-spacing: 0.18em;
}

.menu-content {
  padding: 22px;
}

.control-group {
  display: grid;
  gap: 9px;
  padding: 0 0 20px;
  margin: 0 0 20px;
  border-bottom: 1px solid var(--line);
}

.control-group > label,
.range-label {
  font-size: 11px;
  letter-spacing: 0.12em;
}

.control-group.is-hidden {
  display: none;
}

.button,
.small-button,
.text-button,
select {
  border: 1px solid var(--white);
  border-radius: 0;
  background: var(--black);
  color: var(--white);
  appearance: none;
}

.button,
.small-button,
.text-button {
  cursor: pointer;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 42px;
  padding: 10px 12px;
  text-decoration: none;
  font-size: 12px;
  letter-spacing: 0.08em;
  transition: background 100ms ease, color 100ms ease;
}

.button:hover:not(:disabled),
.button:focus-visible,
.small-button:hover:not(:disabled),
.small-button:focus-visible {
  background: var(--white);
  color: var(--black);
}

.button-invert {
  background: var(--white);
  color: var(--black);
}

.button-invert:hover,
.button-invert:focus-visible {
  background: var(--black);
  color: var(--white);
}

.button:disabled,
.small-button:disabled {
  cursor: not-allowed;
  opacity: 0.38;
}

.text-button {
  padding: 7px 8px;
  border: 0;
  border-bottom: 1px solid var(--white);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.text-button:hover,
.text-button:focus-visible {
  background: var(--white);
  color: var(--black);
}

select {
  width: 100%;
  min-height: 42px;
  padding: 10px 34px 10px 12px;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--white) 50%),
    linear-gradient(135deg, var(--white) 50%, transparent 50%);
  background-position:
    calc(100% - 17px) 17px,
    calc(100% - 12px) 17px;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  font-size: 13px;
}

.file-name,
.micro,
.menu-footer p,
.status-box p {
  overflow-wrap: anywhere;
}

.file-name {
  min-height: 16px;
  margin: 0;
  color: var(--grey);
  font-size: 12px;
}

.inline-controls {
  display: grid;
  grid-template-columns: auto auto 1fr;
  align-items: center;
  gap: 10px;
  margin-top: 4px;
}

.small-button {
  min-width: 72px;
  min-height: 34px;
  padding: 7px 10px;
  font-size: 11px;
  letter-spacing: 0.08em;
}

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

.compact-grid {
  grid-template-columns: 1fr 1fr;
}

.compact-grid #vr-button {
  grid-column: 1 / -1;
}

.data-link {
  margin-bottom: 20px;
  background: var(--white);
  color: var(--black);
}

.status-box {
  min-height: 62px;
  padding: 12px;
  border: 1px solid var(--line);
}

.status-box p {
  margin: 0;
  font-size: 12px;
  line-height: 1.45;
}

.status-box .micro {
  margin-top: 5px;
}

.micro {
  color: var(--grey);
  font-size: 10px !important;
  line-height: 1.4;
}

.menu-footer {
  padding-top: 16px;
  color: var(--grey);
  border-top: 1px solid var(--line);
}

.menu-footer p {
  margin: 0;
  font-size: 10px;
  line-height: 1.5;
}

.show-menu {
  position: absolute;
  top: max(14px, env(safe-area-inset-top));
  left: 0;
  z-index: 19;
  display: none;
  min-height: 38px;
  padding: 8px 12px;
  border: 1px solid var(--white);
  border-left: 0;
  border-radius: 0;
  background: rgba(0, 0, 0, 0.84);
  color: var(--white);
  font: 11px Arial, Helvetica, sans-serif;
  letter-spacing: 0.12em;
  cursor: pointer;
}

.show-menu.is-visible {
  display: block;
}

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

:focus-visible {
  outline: 2px solid var(--white);
  outline-offset: 3px;
}

body.is-xr #menu,
body.is-xr .show-menu,
body.is-xr #empty-state {
  display: none;
}

@media (max-width: 640px) {
  #menu {
    width: min(340px, calc(100vw - 16px));
  }

  .menu-header,
  .menu-content {
    padding: 17px;
  }

  .compact-grid {
    grid-template-columns: 1fr;
  }

  .compact-grid #vr-button {
    grid-column: auto;
  }

  .panorama-title {
    top: max(12px, env(safe-area-inset-top));
    max-width: calc(100vw - 28px);
  }

  .viewer-navigation {
    right: max(8px, env(safe-area-inset-right));
    bottom: max(8px, env(safe-area-inset-bottom));
    left: max(8px, env(safe-area-inset-left));
    grid-template-columns: 1fr auto 1fr;
  }

  .viewer-navigation button {
    min-width: 0;
    padding: 9px 7px;
    font-size: 9px;
  }
}


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

/* Panorama stack */
.stack-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.stack-header > label {
  font-size: 11px;
  letter-spacing: 0.12em;
}

#panorama-stack-count {
  color: var(--grey);
  letter-spacing: 0;
}

.stack-clear {
  min-height: 30px;
  padding: 6px 8px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  color: var(--white);
  font-size: 9px;
  letter-spacing: 0.08em;
  cursor: pointer;
}

.stack-clear:hover:not(:disabled),
.stack-clear:focus-visible {
  border-color: var(--white);
  background: var(--white);
  color: var(--black);
}

.stack-clear:disabled {
  cursor: default;
  opacity: 0.35;
}

.panorama-stack {
  display: grid;
  max-height: min(38vh, 360px);
  overflow-y: auto;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.025);
  overscroll-behavior: contain;
}

.stack-empty {
  margin: 0;
  padding: 14px 12px;
  color: var(--grey);
  font-size: 11px;
}

.panorama-stack-item {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) 34px;
  align-items: stretch;
  min-height: 58px;
  border-bottom: 1px solid var(--line);
  transition: background 100ms ease, opacity 100ms ease;
}

.panorama-stack-item:last-child {
  border-bottom: 0;
}

.panorama-stack-item.is-active {
  background: var(--white);
  color: var(--black);
}

.panorama-stack-item.is-disabled {
  opacity: 0.48;
}

.panorama-stack-check {
  align-self: center;
  justify-self: center;
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--white);
  cursor: pointer;
}

.panorama-stack-item.is-active .panorama-stack-check {
  accent-color: var(--black);
}

.panorama-stack-open,
.panorama-stack-remove {
  min-width: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
}

.panorama-stack-open {
  display: grid;
  align-content: center;
  gap: 5px;
  padding: 9px 6px;
  text-align: left;
}

.panorama-stack-title,
.panorama-stack-meta {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.panorama-stack-title {
  font-size: 12px;
  line-height: 1.2;
}

.panorama-stack-meta {
  color: var(--grey);
  font-size: 9px;
  letter-spacing: 0.07em;
}

.panorama-stack-item.is-active .panorama-stack-meta {
  color: rgba(0, 0, 0, 0.65);
}

.panorama-stack-remove {
  border-left: 1px solid var(--line);
  font-size: 22px;
  line-height: 1;
}

.panorama-stack-item.is-active .panorama-stack-remove {
  border-left-color: rgba(0, 0, 0, 0.3);
}

.panorama-stack-open:hover,
.panorama-stack-open:focus-visible,
.panorama-stack-remove:hover,
.panorama-stack-remove:focus-visible {
  background: rgba(255, 255, 255, 0.13);
}

.panorama-stack-item.is-active .panorama-stack-open:hover,
.panorama-stack-item.is-active .panorama-stack-open:focus-visible,
.panorama-stack-item.is-active .panorama-stack-remove:hover,
.panorama-stack-item.is-active .panorama-stack-remove:focus-visible {
  background: rgba(0, 0, 0, 0.1);
}

@media (max-width: 640px) {
  .panorama-stack {
    max-height: 32vh;
  }

  .panorama-stack-item {
    min-height: 64px;
  }
}