/* 3D model viewer in the Projects section. The three --cad-* colors are read by
   cad/viewer.js at runtime, so the model follows the page theme. */

:root {
  --cad-metal: #9AA3AB;
  --cad-hardware: #6E7780;
  --cad-edge: #1E2328;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --cad-metal: #A7B1BA;
    --cad-hardware: #7D8791;
    --cad-edge: #0C1014;
  }
}

:root[data-theme="dark"] {
  --cad-metal: #A7B1BA;
  --cad-hardware: #7D8791;
  --cad-edge: #0C1014;
}

.cad {
  grid-column: 1 / -1;
  border: 1px solid var(--rule);
  background: var(--paper-raised);
}

/* Elements here set their own display, which would otherwise beat [hidden]. */
.cad [hidden] { display: none !important; }

/* ---------- Tabs ---------- */
.cad-tabs {
  display: flex;
  overflow-x: auto;
  overflow-y: hidden; /* keeps the selected-tab underline from adding a vertical scrollbar */
  border-bottom: 1px solid var(--rule);
  scrollbar-width: none;
}
.cad-tabs::-webkit-scrollbar { display: none; }

.cad-tab {
  position: relative;
  flex: none;
  padding: 13px 18px 12px;
  border: 0;
  border-right: 1px solid var(--rule);
  background: transparent;
  color: var(--ink-2);
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1.2;
  text-transform: uppercase;
  white-space: nowrap;
  cursor: pointer;
}
.cad-tab:hover { color: var(--ink); }
.cad-tab[aria-selected="true"] { color: var(--ink); background: var(--paper); }
.cad-tab[aria-selected="true"]::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: var(--accent);
}
.cad-tab:focus-visible { outline-offset: -3px; }

/* ---------- Viewport ---------- */
.cad-view {
  position: relative;
  aspect-ratio: 16 / 9;
  min-height: 16rem;
  overflow: hidden;
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
  background-position: -1px -1px;
}

.cad-canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
}
.cad-canvas:active { cursor: grabbing; }

.cad-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  margin: 0;
  padding: 24px;
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  text-align: center;
  color: var(--ink-2);
  pointer-events: none;
}
.cad-overlay.is-error { color: var(--accent); }

.cad-hint {
  position: absolute;
  right: 12px;
  bottom: 10px;
  margin: 0;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
  color: var(--ink-3);
  pointer-events: none;
}

/* ---------- Caption: one per tab ---------- */
.cad-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 4px 24px;
  padding: 14px 18px 16px;
  border-top: 1px solid var(--rule);
}
.cad-panel:focus-visible { outline-offset: -3px; }

.cad-title {
  margin: 0;
  font-family: var(--display);
  font-weight: 400;
  font-synthesis: none;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  line-height: 1.4;
  text-transform: uppercase;
}

.cad-meta {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  color: var(--ink-3);
  text-align: right;
}

.cad-desc {
  grid-column: 1 / -1;
  margin: 0;
  max-width: 68ch;
  font-size: 0.9375rem;
  color: var(--ink-2);
}

/* Before the viewer script runs, show only the first caption. */
.js .cad:not(.is-enhanced) .cad-panel + .cad-panel { display: none; }

/* Without JavaScript: no tabs or viewer — every caption shows as plain text. */
html:not(.js) .cad-tabs,
html:not(.js) .cad-view { display: none; }
html:not(.js) .cad-view + .cad-panel { border-top: 0; }

@media (max-width: 560px) {
  /* All five tabs stay visible: they wrap and stretch to fill each row. */
  .cad-tabs { flex-wrap: wrap; overflow: visible; }
  .cad-tab { flex: 1 1 auto; border-bottom: 1px solid var(--rule); margin-bottom: -1px; }
  .cad-view { aspect-ratio: 4 / 3; }
  .cad-panel { grid-template-columns: minmax(0, 1fr); padding: 12px 14px 14px; }
  .cad-meta { text-align: left; }
  .cad-hint { left: 12px; right: auto; }
}

@media print {
  .cad { display: none; }
}