/* ═══════════════════════════════════════════════
   NSS TSEC — Preloader & Offline Screen
   White background + mix-blend-mode removes
   the black background from nss_logo.png
   ═══════════════════════════════════════════════ */

/* ── Body hidden until preloader fades ── */
body.preloading {
  overflow: hidden;
}

/* ── Preloader Overlay ── */
#nss-preloader {
  position: fixed;
  inset: 0;
  z-index: 99999;
  background: #ffffff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  transition: opacity 0.7s ease, visibility 0.7s ease;
}

#nss-preloader.hide {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* ── Logo wrapper — handles rotation ── */
.preloader-logo-wrap {
  animation: preloader-rotate 2.5s linear infinite;
}

/* Remove black corners: the NSS logo is circular, so we clip it to a circle.
   This removes the black square corners from the PNG entirely. */
.preloader-logo-wrap img {
  width: 140px;
  height: 140px;
  clip-path: circle(50% at 50% 50%);
  display: block;
}

/* Brief scale-pulse before spinning starts */
@keyframes preloader-rotate {
  0%   { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ── Text: "Loading..." ── */
.preloader-text {
  font-family: 'Inter', 'Poppins', sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: #333;
  animation: preloader-pulse 1.6s ease-in-out infinite;
}

@keyframes preloader-pulse {
  0%, 100% { opacity: 0.4; }
  50%       { opacity: 1; }
}

/* ── Progress bar ── */
.preloader-bar-track {
  width: 160px;
  height: 3px;
  background: rgba(0, 0, 0, 0.08);
  border-radius: 10px;
  overflow: hidden;
}

.preloader-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #3a3a9e, #d32f2f);
  border-radius: 10px;
  animation: preloader-bar 2s ease-out forwards;
}

@keyframes preloader-bar {
  0%   { width: 0%; }
  60%  { width: 75%; }
  100% { width: 100%; }
}

/* ══════════════════════════════
   OFFLINE / NO INTERNET SCREEN
   ══════════════════════════════ */
#nss-offline {
  position: fixed;
  inset: 0;
  z-index: 99998;
  background: #ffffff;
  display: none;                 /* JS shows this only when offline */
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
}

#nss-offline.visible {
  display: flex;
}

.offline-logo-wrap {
  animation: offline-pulse-scale 2s ease-in-out infinite;
}

.offline-logo-wrap img {
  width: 120px;
  height: 120px;
  clip-path: circle(50% at 50% 50%);
  display: block;
}

@keyframes offline-pulse-scale {
  0%, 100% { transform: scale(1);    opacity: 0.9; }
  50%       { transform: scale(1.06); opacity: 1;   }
}

.offline-text {
  font-family: 'Inter', 'Poppins', sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #555;
  animation: preloader-pulse 2s ease-in-out infinite;
}

.offline-hint {
  font-family: 'Inter', 'Poppins', sans-serif;
  font-size: 0.75rem;
  color: #aaa;
  letter-spacing: 1px;
}

/* ── Respect reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  .preloader-logo-wrap,
  .offline-logo-wrap {
    animation: none;
  }
  .preloader-text,
  .offline-text {
    animation: none;
    opacity: 1;
  }
}