/* ==========================================================================
   Gothic Codex — Loading Screen
   Initial loading screen shown while CSS/JS load and pages prefetch
   ========================================================================== */

.loading-screen {
  position: fixed;
  inset: 0;
  z-index: var(--z-loading);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-ui);
  opacity: 1;
  visibility: visible;
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              visibility 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: all;
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* Loading container with obsidian glass effect */
.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  padding: 48px;
  background: var(--glass-obsidian);
  -webkit-backdrop-filter: blur(var(--glass-blur));
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid rgba(209, 15, 26, 0.2);
  border-top: 2px solid var(--glass-border-top);
  border-radius: 8px;
  box-shadow: var(--shadow-obsidian);
  min-width: 280px;
  max-width: 90vw;
}

/* Logo/Brand */
.loading-logo {
  width: 64px;
  height: 64px;
  opacity: 0.9;
  animation: loading-pulse 2s ease-in-out infinite;
}

@keyframes loading-pulse {
  0%, 100% {
    opacity: 0.9;
    transform: scale(1);
    filter: drop-shadow(0 0 10px rgba(209, 15, 26, 0.3));
  }
  50% {
    opacity: 1;
    transform: scale(1.05);
    filter: drop-shadow(0 0 20px rgba(209, 15, 26, 0.5));
  }
}

/* Loading text */
.loading-text {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--ink);
  text-align: center;
  margin: 0;
}

/* Loading spinner */
.loading-spinner {
  width: 48px;
  height: 48px;
  position: relative;
  margin: 16px 0;
}

.loading-spinner::before,
.loading-spinner::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 3px solid transparent;
  border-top-color: var(--gc-red);
  border-radius: 50%;
  animation: loading-spin 1.2s linear infinite;
}

.loading-spinner::after {
  border-top-color: var(--gc-red2);
  animation-delay: -0.6s;
  opacity: 0.6;
}

@keyframes loading-spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* Progress indicator (optional, for prefetch progress) */
.loading-progress {
  width: 100%;
  height: 2px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 1px;
  overflow: hidden;
  margin-top: 8px;
}

.loading-progress-bar {
  --loading-progress: 0%;
  height: 100%;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--gc-red) 20%,
    var(--gc-red2) 50%,
    var(--gc-red) 80%,
    transparent 100%);
  background-size: 200% 100%;
  animation: loading-progress-shimmer 2s ease-in-out infinite;
  width: var(--loading-progress);
  transition: width 0.3s ease;
}

@keyframes loading-progress-shimmer {
  0% {
    background-position: 100% 0;
  }
  100% {
    background-position: -100% 0;
  }
}

/* Status text (optional, for showing what's loading) */
.loading-status {
  font-size: 12px;
  color: var(--muted);
  text-align: center;
  margin-top: 8px;
  min-height: 16px;
  opacity: 0.7;
}

/* Mobile responsive */
@media (max-width: 600px) {
  .loading-container {
    padding: 32px 24px;
    gap: 24px;
    min-width: auto;
  }

  .loading-logo {
    width: 48px;
    height: 48px;
  }

  .loading-text {
    font-size: 16px;
  }

  .loading-spinner {
    width: 40px;
    height: 40px;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .loading-logo {
    animation: none;
    opacity: 1;
  }

  .loading-spinner::before,
  .loading-spinner::after {
    animation: none;
    border-top-color: var(--gc-red);
  }

  .loading-progress-bar {
    animation: none;
    background: var(--gc-red);
  }
}