/**
 * navigation.css
 * Burger-Menü: Sprungmarken zu Dashboard-Bereichen + Öffnen bestehender Modals.
 */
.tk-burger-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--void-3);
  border: 1px solid var(--border-subtle);
  color: var(--mist);
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}
.tk-burger-btn:hover { color: var(--moon); background: var(--void-4); }
.tk-burger-btn:active { transform: scale(0.94); }

.tk-nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(6, 6, 12, 0.6);
  backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
  z-index: 99;
}
.tk-nav-overlay.is-open { opacity: 1; pointer-events: auto; }

.tk-nav-panel {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: 280px;
  background: var(--void-2);
  border-right: 1px solid var(--border-default);
  z-index: 100;
  overflow-y: auto;
  transform: translateX(-100%);
  transition: transform var(--transition-base);
  display: flex;
  flex-direction: column;
}
.tk-nav-panel.is-open { transform: translateX(0); }

.tk-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}
.tk-nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 500;
  color: var(--moon);
}
.tk-nav-brand svg { color: var(--dusk); }

.tk-nav-close {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--mist);
  background: var(--void-3);
  border: 1px solid var(--border-subtle);
  flex-shrink: 0;
}
.tk-nav-close:hover { color: var(--moon); }

.tk-nav-menu {
  flex: 1;
  padding: var(--space-4) 0;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}
.tk-nav-section-title {
  font-size: 11px;
  font-weight: 800;
  color: var(--mist-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: var(--space-4) var(--space-5) var(--space-2);
  margin-top: var(--space-2);
}
.tk-nav-section-title:first-child { margin-top: 0; }

.tk-nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  color: var(--mist);
  font-size: 14.5px;
  font-weight: 600;
  border-left: 3px solid transparent;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  cursor: pointer;
  width: 100%;
  text-align: left;
}
.tk-nav-item:hover { background: var(--void-3); color: var(--moon); }
.tk-nav-item svg { color: inherit; flex-shrink: 0; }

.tk-nav-divider {
  height: 1px;
  background: var(--border-subtle);
  margin: var(--space-3) 0;
}

.tk-nav-footer {
  padding: var(--space-5);
  border-top: 1px solid var(--border-subtle);
  font-size: 13px;
  color: var(--mist);
  flex-shrink: 0;
}
.tk-nav-footer strong { color: var(--moon); }

@media (max-width: 640px) {
  .tk-nav-panel { width: 240px; }
}