/* ═══════════════════════════════════════════════════════════════
   LOADING OVERLAY
   ═══════════════════════════════════════════════════════════════ */
.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

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

.loading-sigil {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.loading-diamond {
  width: 80px;
  height: 80px;
  animation: spin-diamond 3s linear infinite;
}

@keyframes spin-diamond {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.loading-text {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: pulse-text 2s ease-in-out infinite;
}

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

/* ═══════════════════════════════════════════════════════════════
   HEADER
   ═══════════════════════════════════════════════════════════════ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: hsla(218, 31%, 10%, 0.85);
  backdrop-filter: blur(24px) saturate(150%);
  -webkit-backdrop-filter: blur(24px) saturate(150%);
  border-bottom: 1px solid var(--color-border-subtle);
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-sm) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.brand-sigil {
  font-family: var(--font-header);
  font-size: 1.5rem;
  font-style: italic;
  font-weight: 600;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: sigil-pulse 4s ease-in-out infinite;
}

.brand-sigil-large {
  font-size: 3rem;
  background: var(--gradient-diamond);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

@keyframes sigil-pulse {
  0%, 100% { filter: brightness(1); }
  50%      { filter: brightness(1.4); }
}

.brand-name {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text);
}

.brand-epoch {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-dim);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 2px 8px;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
}

.sigil-nav {
  display: flex;
  gap: 2px;
  align-items: center;
  background: hsla(218, 31%, 10%, 0.9);
  padding: 3px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-subtle);
}

.sigil-btn {
  background: transparent;
  border: none;
  padding: 6px 8px;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  min-width: 40px;
  min-height: 40px;
  border-radius: var(--radius-md);
}

.sigil-icon {
  width: 22px;
  height: 22px;
  transition: all var(--transition-fast);
}

.sigil-btn:hover {
  color: var(--color-text);
  background: hsla(40, 46%, 61%, 0.08);
}

.sigil-btn.active {
  color: var(--color-accent);
  background: hsla(40, 46%, 61%, 0.15);
}

.sigil-btn.active .sigil-icon {
  filter: drop-shadow(0 0 6px hsla(40, 46%, 61%, 0.4));
}

.status-indicator {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  color: var(--color-text-muted);
}

.status-indicator.tier-high { color: var(--color-mind); border-color: hsla(180, 100%, 50%, 0.3); background: hsla(180, 100%, 50%, 0.08); }
.status-indicator.tier-mid  { color: var(--color-accent); border-color: hsla(45, 100%, 50%, 0.3); background: hsla(45, 100%, 50%, 0.08); }
.status-indicator.tier-lite { color: var(--color-text-muted); }