/* ============================================================
   Lop cam giac native — di kem native.js.
   Tach khoi styles.css de tranh dung do khi nhieu nguoi cung sua.
   ============================================================ */

/* Cho trinh duyet biet: cuon doc la cua no, vuot ngang la cua ta. */
.scroll {
  touch-action: pan-y;
}

/* Panel duoc keo/vuot bang tay -> chuyen dong lo xo khi tha ra. */
.tab-panel {
  will-change: transform;
  transition:
    transform 0.34s cubic-bezier(0.2, 0.9, 0.25, 1),
    opacity 0.28s ease;
}

/* Khi dang vuot thi tat animation vao-panel, neu khong se giat. */
.tab-panel.is-active[style*="translate"] {
  animation: none !important;
}

/* ── chi bao keo-de-lam-moi ───────────────────────────────── */

.ptr {
  position: absolute;
  top: 62px;
  left: 50%;
  z-index: 4;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-left: -17px;
  border-radius: 50%;
  background: linear-gradient(180deg, var(--glass-top), var(--glass-bot)), var(--glass-base);
  -webkit-backdrop-filter: var(--blur);
  backdrop-filter: var(--blur);
  border: 1px solid var(--brd);
  box-shadow: var(--edge), 0 10px 24px -12px #000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.32s cubic-bezier(0.2, 0.9, 0.25, 1),
    box-shadow 0.24s ease;
}

.ptr svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: var(--ink-3);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke 0.2s ease;
}

/* du nguong -> doi mau + phat sang, bao "tha ra la chay" */
.ptr.is-armed {
  border-color: rgba(77, 225, 255, 0.5);
  box-shadow: var(--edge), 0 0 22px -4px rgba(77, 225, 255, 0.9);
}
.ptr.is-armed svg {
  stroke: var(--accent);
}

.ptr.is-spinning {
  opacity: 1;
  transform: translateY(30px);
}
.ptr.is-spinning svg {
  stroke: var(--accent);
  animation: ptr-spin 0.8s linear infinite;
}

@keyframes ptr-spin {
  to {
    transform: rotate(360deg);
  }
}

/* Vo may la moc dinh vi cho .ptr (no duoc chen ngay truoc .scroll). */
.phone {
  position: relative;
}

@media (prefers-reduced-motion: reduce) {
  .tab-panel {
    transition: none;
    will-change: auto;
  }
  .ptr {
    display: none;
  }
}