/* engine/styles.css — brand-agnostic styles for the Lumen 3D engine.
   The engine has no opinions about the host page. Demo-specific styles
   (header, footer, product card) belong to the demo, not here. */

/* ---- Themable chrome (loader + picker). Host pages can override ----
   Defaults are light. The Vermeil demo flips them to dark in demo/styles.css. */
:root {
  --lumen-loader-bg: rgba(255, 255, 255, 0.85);
  --lumen-loader-text: #666;
  --lumen-spinner-track: rgba(0, 0, 0, 0.1);
  --lumen-spinner-head: #e25d29;
  --lumen-popover-bg: rgba(255, 255, 255, 0.92);
  --lumen-popover-border: rgba(0, 0, 0, 0.08);
  --lumen-popover-shadow: rgba(0, 0, 0, 0.08);
  --lumen-popover-text: #1a1a1a;
  --lumen-popover-hover: rgba(0, 0, 0, 0.05);
  --lumen-popover-active-bg: #1a1a1a;
  --lumen-popover-active-text: #fff;
}

* { box-sizing: border-box; }

.lumen-engine {
  position: relative;
  width: 100%;
  height: 100%;
  background: #2a2a2a;
  overflow: hidden;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.lumen-engine canvas { display: block; }

/* ---- Loader ---- */
.lumen-loader {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: var(--lumen-loader-bg);
  z-index: 10;
  transition: opacity 0.35s ease;
}
.lumen-loader.lumen-loader-hidden {
  opacity: 0;
  pointer-events: none;
}
.lumen-spinner {
  width: 38px;
  height: 38px;
  border: 2px solid var(--lumen-spinner-track);
  border-top-color: var(--lumen-spinner-head);
  border-radius: 50%;
  animation: lumen-spin 0.9s linear infinite;
}
@keyframes lumen-spin { to { transform: rotate(360deg); } }
.lumen-loader-text {
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--lumen-loader-text);
}

/* ---- Product picker (desktop pill row) ---- */
.lumen-picker {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  padding: 6px;
  background: var(--lumen-popover-bg);
  border: 1px solid var(--lumen-popover-border);
  border-radius: 999px;
  z-index: 5;
  box-shadow: 0 2px 12px var(--lumen-popover-shadow);
  max-width: calc(100vw - 32px);
  flex-wrap: wrap;
  justify-content: center;
}
.lumen-picker button {
  appearance: none;
  border: none;
  background: transparent;
  padding: 6px 14px;
  border-radius: 999px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--lumen-popover-text);
  cursor: pointer;
  letter-spacing: 0.01em;
  transition: background 0.15s ease, color 0.15s ease;
}
.lumen-picker button:hover { background: var(--lumen-popover-hover); }
.lumen-picker button.lumen-active {
  background: var(--lumen-popover-active-bg);
  color: var(--lumen-popover-active-text);
}

/* ---- Mobile product picker (arrows + current name) ----
   Hidden on desktop; flipped on below 720px. */
.lumen-picker-mobile {
  display: none;
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  align-items: center;
  gap: 4px;
  flex-direction: column;
}
.lumen-picker-mobile .lumen-mobile-tooltips {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 0 8px;
}
.lumen-picker-mobile .lumen-mobile-tooltips span {
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--lumen-popover-text);
  opacity: 0.75;
  min-width: 44px;
  text-align: center;
}
.lumen-picker-mobile .lumen-mobile-tooltips span:last-child { text-align: right; }
.lumen-picker-mobile .lumen-mobile-tooltips span:first-child { text-align: left; }
.lumen-picker-mobile .lumen-mobile-bar {
  display: flex;
  align-items: center;
  gap: 4px;
}
.lumen-picker-mobile button {
  appearance: none;
  border: 1px solid var(--lumen-popover-border);
  background: var(--lumen-popover-bg);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-family: inherit;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--lumen-popover-text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  box-shadow: 0 2px 12px var(--lumen-popover-shadow);
  transition: background 0.15s ease;
}
.lumen-picker-mobile button:hover { background: var(--lumen-popover-hover); }
.lumen-picker-mobile button:active { background: var(--lumen-popover-active-bg); }
.lumen-picker-mobile .lumen-current {
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--lumen-popover-text);
  min-width: 96px;
  text-align: center;
  letter-spacing: 0.01em;
}

@media (max-width: 720px) {
  .lumen-picker { display: none; }
  .lumen-picker-mobile { display: flex; }
}

/* ---- card mode (small embed) ----
   In card mode the engine is a thumbnail: no picker, no controls cursor.
   The host page is expected to size the .lumen-engine container itself. */
.lumen-engine--card canvas { cursor: pointer; }
.lumen-engine--card .lumen-loader-text { font-size: 11px; }
.lumen-engine--card .lumen-spinner { width: 24px; height: 24px; border-width: 2px; }

/* ---- Debug overlay (hidden, only with .lumen-debug-overlay present) ---- */
.lumen-debug-overlay {
  position: absolute;
  top: 8px;
  right: 8px;
  z-index: 20;
  background: rgba(0, 0, 0, 0.7);
  color: #fff;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 11px;
  line-height: 1.4;
  padding: 6px 10px;
  border-radius: 4px;
  pointer-events: none;
  white-space: nowrap;
  letter-spacing: 0.02em;
}
.lumen-debug-overlay b { color: #f4a261; font-weight: 600; }