/* CAD assembly viewer, scoped to the Tapper project page. */
.tapper-explorer { --explorer-sticky-top: 82px; margin: 0 0 var(--section-space, 40px); scroll-margin-top: 90px; min-width: 0; }
.tapper-explorer.is-ready { height: 210vh; height: 210svh; }
.tapper-explorer__panel {
  position: relative; border: 1px solid var(--line-strong); border-radius: var(--radius-md, 16px);
  background: var(--surface); color: var(--ink-soft); overflow: hidden;
}
.is-ready .tapper-explorer__panel { position: sticky; top: var(--explorer-sticky-top); }
.tapper-explorer.is-inline { height: auto; }
.is-inline .tapper-explorer__panel { position: relative; top: auto; }
.tapper-explorer__heading { padding: 22px 24px 0; }
.tapper-explorer__eyebrow { color: var(--accent); font: 600 var(--type-label, 12px)/1.5 var(--ff-mono); letter-spacing: .08em; text-transform: uppercase; }
.tapper-explorer h2 { color: var(--ink); font-size: clamp(23px, 3vw, 34px); font-weight: 500; line-height: 1.2; letter-spacing: -.035em; margin: 10px 0 12px; text-wrap: balance; }
.tapper-explorer__note { color: var(--muted); font-size: var(--type-small, 14px); line-height: 1.65; max-width: 64ch; }
.tapper-explorer__scene { position: relative; margin-top: 8px; }
.tapper-explorer__viewport { height: clamp(320px, 48svh, 580px); position: relative; min-width: 0; }
.tapper-explorer__rotate-hint {
  position: absolute; z-index: 2; left: 50%; bottom: 16px;
  display: none; align-items: center; gap: 9px;
  width: max-content; max-width: calc(100% - 24px); padding: 9px 13px;
  border: 1px solid var(--line-strong); border-radius: 999px;
  background: var(--surface); color: var(--ink);
  font: 600 var(--type-label, 12px)/1.4 var(--ff-mono); letter-spacing: .02em;
  text-align: center; overflow-wrap: anywhere; pointer-events: none; user-select: none;
  transform: translateX(-50%);
}
.tapper-explorer.is-ready:not(.has-rotated) .tapper-explorer__rotate-hint { display: flex; }
.tapper-explorer__rotate-arrow {
  flex: 0 0 auto; color: var(--accent); font-size: 19px; line-height: 1;
  animation: explorer-arrow-blink 1.4s ease-in-out infinite;
}
.tapper-explorer__rotate-arrow:last-child { animation-delay: .7s; }
@keyframes explorer-arrow-blink {
  0%, 100% { opacity: .32; }
  50% { opacity: 1; }
}
.tapper-explorer__scene {
  background: radial-gradient(ellipse at 48% 42%, #707275 0%, #484b4e 60%, #262b2d 100%);
  border-block: 1px solid var(--line-strong);
}
/* Keep a neutral studio backdrop so the silver mechanical parts remain legible. */
.light-theme .tapper-explorer__scene { background: radial-gradient(ellipse at 48% 42%, #ffffff 0%, #e9eeea 58%, #cdd5cf 100%); }
.tapper-explorer__scene canvas { display: block; width: 100%; height: 100%; touch-action: pan-y; cursor: grab; }
.tapper-explorer__scene canvas:active { cursor: grabbing; }
.tapper-explorer__fallback { width: 100%; height: 100%; object-fit: contain; padding: 16px; }
.tapper-explorer.is-ready .tapper-explorer__fallback { display: none; }
.tapper-explorer__labels { display: none; background: var(--surface-soft); }
.is-ready .tapper-explorer__labels {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px;
  padding: 10px 12px;
}
.tapper-explorer__label {
  color: var(--ink-soft); background: var(--surface-raised); border: 1px solid var(--line);
  border-radius: 6px; padding: 8px 10px; font: var(--type-label, 12px)/1.5 var(--ff-mono);
  min-width: 0; overflow-wrap: anywhere;
}
.tapper-explorer__controls { border-top: 1px solid var(--line); padding: 16px 24px 20px; }
.tapper-explorer__controls[hidden], .tapper-explorer [hidden] { display: none; }
.tapper-explorer__progress { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; font: var(--type-label, 12px)/1.5 var(--ff-mono); color: var(--muted); }
.tapper-explorer__progress output { flex: 0 0 auto; color: var(--accent); font-variant-numeric: tabular-nums; }
.tapper-explorer input[type="range"] { width: 100%; height: 44px; margin: 4px 0 8px; accent-color: var(--accent); cursor: pointer; }
.tapper-explorer__actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.tapper-explorer__actions button { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; border: 1px solid var(--line-strong); color: var(--ink-soft); border-radius: 8px; padding: 10px 14px; font: 500 var(--type-label, 12px)/1.45 var(--ff-mono); text-align: center; overflow-wrap: anywhere; transition: color 160ms ease, background-color 160ms ease, border-color 160ms ease; }
.tapper-explorer__actions button:disabled { opacity: .45; cursor: default; }
.tapper-explorer :is(button, input, canvas):focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.tapper-explorer canvas:focus-visible { outline-offset: -3px; }
.tapper-explorer__actions button:not(:disabled):is(:hover, :focus-visible) { color: var(--ink); border-color: var(--accent); background: var(--accent-soft); }
.tapper-explorer__actions button[aria-pressed="true"],
.tapper-explorer__actions button[aria-pressed="true"]:not(:disabled):is(:hover, :focus-visible) { background: var(--accent); color: var(--page-bg); border-color: var(--accent); }
.tapper-explorer__status { color: var(--muted); font-size: var(--type-small, 14px); line-height: 1.6; margin: 12px 0 0; min-height: 2.9em; overflow-wrap: anywhere; }
.tapper-explorer__fallback-note { padding: 0 24px 22px; color: var(--muted); font-size: var(--type-small, 14px); line-height: 1.6; }
.tapper-explorer__legend { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin: 0 0 38px; }
.tapper-explorer__legend div { padding: 16px 0; border-top: 1px solid var(--line); }
.tapper-explorer__legend dt { color: var(--ink); font-size: var(--type-small, 14px); font-weight: 500; margin-bottom: 7px; }
.tapper-explorer__legend dd { font-size: var(--type-small, 14px); line-height: 1.7; color: var(--muted); margin: 0; }
@media (max-width: 700px) {
  .tapper-explorer { --explorer-sticky-top: 76px; }
  .tapper-explorer__heading { padding: 16px 16px 0; }
  .tapper-explorer__controls { padding: 12px 16px 16px; }
  .tapper-explorer__viewport { height: clamp(260px, 38svh, 340px); }
  .tapper-explorer__rotate-hint { bottom: 12px; gap: 7px; padding: 8px 10px; }
  .tapper-explorer__label { padding: 7px 8px; }
  .tapper-explorer__actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tapper-explorer__actions button { padding: 8px; }
  .tapper-explorer__actions [data-explorer-follow] { grid-column: 1 / -1; }
  .tapper-explorer__actions [data-explorer-yaw] { font-size: var(--type-label, 12px); }
  .tapper-explorer__legend { grid-template-columns: 1fr; gap: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .tapper-explorer.is-ready { height: auto; }
  .is-ready .tapper-explorer__panel { position: relative; top: auto; }
  .tapper-explorer__rotate-arrow { animation: none; opacity: 1; }
}