/* ============================================================
   PT. Son Duct Sejahtera — Interactive 3D stage (chiller / VRV)
   Overlay UI for the three.js scene. On-brand: navy + red.
   ============================================================ */

.stage-section { padding: 28px 0 40px; }

.container-wide {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ---------- 3D stage ---------- */
.stage3d {
  position: relative;
  width: 100%;
  height: clamp(480px, 76vh, 820px);
  border-radius: 14px;
  overflow: hidden;
  background: linear-gradient(180deg, #eaf1f8 0%, #dfe9f2 60%, #d4dfe9 100%);
  box-shadow: 0 12px 40px rgba(11, 42, 74, 0.18);
  border: 1px solid var(--border);
  user-select: none;
}
#c3d {
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  cursor: grab;
}
#c3d:active { cursor: grabbing; }

/* ---------- Loader ---------- */
.s3d-loader {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 14px; color: var(--navy); font-weight: 600;
  background: linear-gradient(180deg, #eaf1f8, #d4dfe9);
  transition: opacity .5s ease, visibility .5s ease; z-index: 20;
}
.s3d-loader.hide { opacity: 0; visibility: hidden; }
.s3d-spinner {
  width: 42px; height: 42px; border-radius: 50%;
  border: 4px solid rgba(20, 73, 126, .2);
  border-top-color: var(--blue);
  animation: s3d-spin 0.9s linear infinite;
}
@keyframes s3d-spin { to { transform: rotate(360deg); } }
.s3d-progress {
  width: 220px; max-width: 62vw; height: 6px; border-radius: 999px;
  background: rgba(20, 73, 126, .16); overflow: hidden;
}
.s3d-progress-bar {
  width: 0%; height: 100%; border-radius: 999px;
  background: linear-gradient(90deg, var(--blue), var(--navy));
  transition: width .18s linear;
}
.s3d-loader-text { font-size: .9rem; font-weight: 600; color: var(--navy); }
.s3d-loader-text #loader-pct { color: var(--blue); font-variant-numeric: tabular-nums; }

/* ---------- Buttons ---------- */
.s3d-btn {
  appearance: none; cursor: pointer;
  font-family: inherit; font-weight: 700; font-size: .86rem;
  color: var(--navy); background: rgba(255,255,255,.92);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 9px 14px; transition: .18s; line-height: 1;
  backdrop-filter: blur(4px); white-space: nowrap;
}
.s3d-btn:hover { background: #fff; box-shadow: 0 4px 14px rgba(11,42,74,.16); transform: translateY(-1px); }
.s3d-btn:disabled { opacity: .45; cursor: default; transform: none; box-shadow: none; }
.s3d-btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.s3d-btn-primary:hover { background: var(--accent-dark); color: #fff; }

/* ---------- Controls (top-right) ---------- */
.s3d-controls {
  position: absolute; top: 14px; right: 14px; z-index: 12;
  display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end;
  max-width: 70%;
}

/* ---------- Legend (bottom-left) ---------- */
.s3d-legend {
  position: absolute; bottom: 14px; left: 14px; z-index: 11;
  background: rgba(255,255,255,.92); backdrop-filter: blur(4px);
  border: 1px solid var(--border); border-radius: 10px;
  padding: 10px 13px; font-size: .8rem; color: var(--text);
  box-shadow: 0 4px 16px rgba(11,42,74,.12);
}
.s3d-legend-title { font-weight: 700; color: var(--navy); margin-bottom: 6px; font-size: .78rem; text-transform: uppercase; letter-spacing: .5px; }
.s3d-legend-row { display: flex; align-items: center; gap: 8px; margin-top: 4px; }
.s3d-legend-row .sw { width: 18px; height: 8px; border-radius: 4px; flex: none; }
.sw-chws { background: #1d6fb8; }
.sw-chwr { background: #c0392b; }
.sw-cdw  { background: #2e8b57; }
.sw-cdw-hot  { background: #9acd32; }
.sw-cdw-cold { background: #009688; }
.sw-air  { background: #f0a24a; }
.sw-gas  { background: #e07b39; }
.sw-liq  { background: #9b59c6; }

/* ---------- Hint (bottom-center) ---------- */
.s3d-hint {
  position: absolute; bottom: 14px; left: 50%; transform: translateX(-50%);
  z-index: 10; font-size: .78rem; color: var(--navy);
  background: rgba(255,255,255,.82); border: 1px solid var(--border);
  padding: 6px 14px; border-radius: 999px; backdrop-filter: blur(4px);
  white-space: nowrap; pointer-events: none;
}

/* ---------- Info card (click equipment) ---------- */
.s3d-info {
  position: absolute; bottom: 16px; right: 16px; z-index: 14;
  width: min(340px, calc(100% - 32px));
  background: #fff; border: 1px solid var(--border); border-radius: 12px;
  padding: 18px 18px 18px; box-shadow: 0 14px 40px rgba(11,42,74,.24);
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: opacity .22s ease, transform .22s ease, visibility .22s;
}
.s3d-info.show { opacity: 1; visibility: visible; transform: none; }
.s3d-info h3 { color: var(--navy); font-size: 1.08rem; margin: 0 26px 8px 0; }
.s3d-info p { color: var(--text-light); font-size: .9rem; line-height: 1.55; margin: 0; }
.s3d-info-close {
  position: absolute; top: 10px; right: 12px; z-index: 2;
  background: none; border: none; cursor: pointer;
  font-size: 1.5rem; line-height: 1; color: var(--text-light); padding: 2px 6px;
}
.s3d-info-close:hover { color: var(--accent); }

/* ---------- Guided tour card (bottom-center) ---------- */
.s3d-tour {
  position: absolute; bottom: 16px; left: 50%; transform: translate(-50%, 10px);
  z-index: 15; width: min(540px, calc(100% - 32px));
  background: #fff; border: 1px solid var(--border); border-radius: 14px;
  padding: 16px 20px 18px; box-shadow: 0 16px 44px rgba(11,42,74,.26);
  opacity: 0; visibility: hidden;
  transition: opacity .25s ease, transform .25s ease, visibility .25s;
}
.s3d-tour.show { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.s3d-tour-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.s3d-tour-step {
  font-size: .74rem; font-weight: 800; letter-spacing: .5px;
  color: #fff; background: var(--navy); padding: 4px 10px; border-radius: 999px;
}
.s3d-tour-exit { background: none; border: none; cursor: pointer; color: var(--text-light); font-weight: 600; font-size: .82rem; }
.s3d-tour-exit:hover { color: var(--accent); }
.s3d-tour h3 { color: var(--navy); font-size: 1.16rem; margin: 0 0 6px; }
.s3d-tour p { color: var(--text-light); font-size: .92rem; line-height: 1.55; margin: 0 0 14px; }
.s3d-tour-nav { display: flex; justify-content: space-between; gap: 10px; }

/* ---------- Disclaimer ---------- */
.s3d-disclaimer {
  text-align: center; color: var(--text-light); font-size: .82rem;
  margin: 14px auto 0; max-width: 760px;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .stage3d { height: clamp(420px, 68vh, 600px); border-radius: 10px; }
  .s3d-controls { top: 10px; right: 10px; gap: 6px; max-width: calc(100% - 20px); }
  .s3d-btn { padding: 8px 11px; font-size: .8rem; }
  .s3d-legend { bottom: 10px; left: 10px; padding: 8px 10px; font-size: .74rem; }
  .s3d-hint { display: none; }
  .s3d-info { left: 12px; right: 12px; bottom: 12px; width: auto; }
  .s3d-tour { left: 12px; right: 12px; transform: translateY(10px); width: auto; }
  .s3d-tour.show { transform: translateY(0); }
}