/* Sayfa / işlem yükleme — çok renkli halka spinner */
.nav-loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 20000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 22px;
  background: #02010c;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s ease;
}
.nav-loading-overlay.is-on {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.nav-loading-spinner {
  position: relative;
  width: 72px;
  height: 72px;
}
.nav-loading-spinner span {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 3px solid transparent;
  animation: nav-loading-spin 1.15s cubic-bezier(0.5, 0.15, 0.5, 0.85) infinite;
}
.nav-loading-spinner span:nth-child(1) {
  border-top-color: #fff;
  animation-delay: 0s;
}
.nav-loading-spinner span:nth-child(2) {
  inset: 5px;
  border-right-color: #ef4444;
  animation-delay: -0.12s;
  animation-direction: reverse;
}
.nav-loading-spinner span:nth-child(3) {
  inset: 10px;
  border-bottom-color: #22c55e;
  animation-delay: -0.24s;
}
.nav-loading-spinner span:nth-child(4) {
  inset: 15px;
  border-left-color: #3b82f6;
  animation-delay: -0.36s;
  animation-direction: reverse;
}

@keyframes nav-loading-spin {
  0% { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(180deg) scale(1.06); }
  100% { transform: rotate(360deg) scale(1); }
}

.nav-loading-text {
  color: #fff;
  font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: none;
}

.nav-loading-slow {
  margin-top: -6px;
  max-width: min(280px, 86vw);
  padding: 8px 14px;
  border-radius: 12px;
  background: rgba(248, 113, 113, 0.12);
  border: 1px solid rgba(248, 113, 113, 0.35);
  color: #fecaca;
  font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  line-height: 1.35;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.nav-loading-slow.is-on {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .nav-loading-spinner span {
    animation-duration: 2.2s;
  }
}

html.sleek-cream .nav-loading-overlay {
  background: #FAF5EB;
}
html.sleek-cream .nav-loading-text {
  color: #2D3436;
  font-weight: 800;
}
html.sleek-cream .nav-loading-slow {
  background: rgba(255, 107, 107, 0.12);
  border-color: rgba(255, 107, 107, 0.3);
  color: #b91c1c;
}