/* ============================================================
   ASTA — Panggung 3D Lengan Bionik
   Mengikuti bahasa visual neumorphism pada tokens.css.
   Kelas diawali arm3d- agar tidak bertabrakan dengan .arm-stage
   yang sudah dipakai sebagai wadah halaman.
   ============================================================ */

.arm3d-stage {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}

/* ---------------- Bilah kendali ---------------- */
.arm3d-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-2);
  flex-wrap: wrap;
}

.arm3d-toggle,
.arm3d-views {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  border-radius: var(--r-md);
  background: var(--bg-deep);
  box-shadow: var(--nm-in-soft);
}
.arm3d-views { flex-wrap: wrap; }

.arm3d-toggle-btn,
.arm3d-view-btn {
  border: 0;
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  font-weight: 650;
  letter-spacing: .02em;
  color: var(--text-3);
  background: transparent;
  padding: 6px 13px;
  border-radius: var(--r-sm);
  transition: color 140ms ease, background 140ms ease, box-shadow 140ms ease;
}
.arm3d-toggle-btn:hover,
.arm3d-view-btn:hover { color: var(--text); }

.arm3d-toggle-btn.active,
.arm3d-view-btn.active {
  color: var(--primary-700);
  background: var(--surface-alt);
  box-shadow: var(--nm-flat);
}
.arm3d-toggle-btn:focus-visible,
.arm3d-view-btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ---------------- Panel tampilan ---------------- */
.arm3d-pane { position: relative; }
.arm3d-pane[hidden] { display: none; }
.arm3d-pane-2d { display: grid; place-items: center; }

.arm3d-canvas {
  position: relative;
  width: 100%;
  /* Cukup tinggi agar lengan sepanjang 62 cm terbaca utuh */
  aspect-ratio: 4 / 3;
  min-height: 260px;
  border-radius: var(--r-lg);
  background:
    radial-gradient(ellipse at 50% 24%, #ffffff 0%, var(--surface) 46%, var(--bg-deep) 100%);
  box-shadow: var(--nm-in);
  overflow: hidden;
  display: grid;
  place-items: center;
  /* Cegah pull-to-refresh saat pengguna memutar model di ponsel */
  touch-action: none;
}
.arm3d-canvas canvas { border-radius: inherit; }

/* Petunjuk seret, memudar setelah interaksi pertama */
.arm3d-canvas::after {
  content: 'Seret untuk memutar';
  position: absolute;
  left: 50%;
  bottom: 10px;
  transform: translateX(-50%);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--text-3);
  background: rgba(255, 255, 255, .74);
  padding: 4px 11px;
  border-radius: 999px;
  pointer-events: none;
  opacity: .9;
  transition: opacity 320ms ease;
}
.arm3d-canvas:active::after { opacity: 0; }

/* ---------------- Keadaan memuat ---------------- */
.arm3d-loading {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: var(--s-3);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-3);
  background: inherit;
}
.arm3d-spinner {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2.5px solid var(--line);
  border-top-color: var(--primary);
  animation: arm3d-spin 820ms linear infinite;
}
@keyframes arm3d-spin { to { transform: rotate(360deg); } }

/* ---------------- Penampil sprite (tanpa WebGL) ---------------- */
.arm3d-sprite {
  position: relative;
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
  touch-action: pan-y;
}
.arm3d-sprite img {
  grid-area: 1 / 1;
  max-width: 92%;
  max-height: 92%;
  width: auto;
  height: auto;
  object-fit: contain;
  pointer-events: none;
  filter: drop-shadow(0 12px 18px rgba(20, 45, 85, .16));
}
.arm3d-sprite:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; }

/* ---------------- Hero 3D pada halaman masuk ---------------- */
.hero3d {
  position: relative;
  margin-top: var(--s-6);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: rgba(255, 255, 255, .10);
  box-shadow: 0 18px 40px rgba(6, 24, 56, .28);
  /* Sedikit kedalaman: gambar bereaksi terhadap gerak kursor */
  perspective: 900px;
}
.hero3d img {
  display: block;
  width: 100%;
  height: auto;
  transform: rotateY(var(--ry, 0deg)) rotateX(var(--rx, 0deg)) scale(1.02);
  transition: transform 420ms cubic-bezier(.2, .8, .2, 1);
  will-change: transform;
}
.hero3d figcaption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 22px 16px 12px;
  font-size: 11.5px;
  letter-spacing: .06em;
  text-transform: uppercase;
  font-weight: 700;
  color: rgba(255, 255, 255, .92);
  background: linear-gradient(to top, rgba(8, 26, 58, .72), transparent);
}

/* ---------------- Galeri render ---------------- */
.render-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--s-4);
}
.render-card {
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--surface);
  box-shadow: var(--nm-2);
}
.render-card img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: var(--bg-deep);
}
.render-card figcaption {
  padding: var(--s-3) var(--s-4);
  font-size: 12.5px;
  color: var(--text-2);
  line-height: 1.5;
}
.render-card figcaption b { display: block; color: var(--text); font-size: 13.5px; }

/* Kartu pose genggaman */
.pose-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--s-3);
}
.pose-card {
  border: 0;
  cursor: pointer;
  font: inherit;
  padding: var(--s-2) var(--s-2) var(--s-3);
  border-radius: var(--r-md);
  background: var(--surface);
  box-shadow: var(--nm-1);
  text-align: center;
  transition: box-shadow 160ms ease, transform 160ms ease;
}
.pose-card:hover { transform: translateY(-2px); box-shadow: var(--nm-2); }
.pose-card.active { box-shadow: var(--nm-in-soft); background: var(--primary-50); }
.pose-card img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
}
.pose-card span {
  display: block;
  font-size: 12px;
  font-weight: 650;
  color: var(--text-2);
}
.pose-card.active span { color: var(--primary-700); }

/* ---------------- Ponsel ---------------- */
@media (max-width: 720px) {
  .arm3d-canvas { min-height: 220px; aspect-ratio: 1 / 1; }
  .arm3d-bar { gap: var(--s-2); }
  .arm3d-views { width: 100%; justify-content: center; }
  .arm3d-view-btn { padding: 6px 10px; font-size: 11.5px; }
}

/* Hormati preferensi pengurangan gerak */
@media (prefers-reduced-motion: reduce) {
  .hero3d img { transition: none; }
  .arm3d-spinner { animation-duration: 2s; }
  .pose-card { transition: none; }
}