/* Offcanvas-Menu (sillysky.net)
   - Slide-in von links
   - Backdrop (Halb-transparent)
   - Hierarchische Liste mit aufklappbaren Unter-Eintraegen
   - Kein externes Framework (Tailwind kommt spaeter)
*/

:root {
  --offcanvas-width: 320px;
  --offcanvas-bg: #ffffff;
  --offcanvas-text: #1f2937;
  --offcanvas-border: #e5e7eb;
  --offcanvas-backdrop: rgba(0, 0, 0, 0.5);
  --offcanvas-accent: #2563eb;
  --offcanvas-z: 1000;
  --offcanvas-label-py: 0.25rem;       /* war 0.4rem -> kompakter */
  --offcanvas-label-px: 0.75rem;       /* war 1rem -> kompakter */
  --offcanvas-label-font: 0.85rem;     /* war 0.9rem -> kompakter */
  --offcanvas-link-font: 0.825rem;    /* war 0.875rem -> kompakter */
}

@media (prefers-color-scheme: dark) {
  :root {
    --offcanvas-bg: #1f2937;
    --offcanvas-text: #f3f4f6;
    --offcanvas-border: #374151;
    --offcanvas-accent: #60a5fa;
  }
}

#ss-offcanvas-backdrop {
  position: fixed;
  inset: 0;
  background: var(--offcanvas-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: opacity 200ms ease, visibility 200ms;
  z-index: var(--offcanvas-z);
}

#ss-offcanvas-backdrop.is-open {
  opacity: 1;
  visibility: visible;
}

#ss-offcanvas {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--offcanvas-width);
  max-width: 90vw;
  background: var(--offcanvas-bg);
  color: var(--offcanvas-text);
  border-right: 1px solid var(--offcanvas-border);
  transform: translateX(-100%);
  transition: transform 250ms ease;
  z-index: calc(var(--offcanvas-z) + 1);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

#ss-offcanvas.is-open {
  transform: translateX(0);
}

#ss-offcanvas-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  border-bottom: 1px solid var(--offcanvas-border);
  position: sticky;
  top: 0;
  background: var(--offcanvas-bg);
  z-index: 2;
}

#ss-offcanvas-title {
  font-weight: 600;
  font-size: 1rem;
  margin: 0;
}

#ss-offcanvas-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  color: var(--offcanvas-text);
  padding: 0.25rem 0.5rem;
}

#ss-offcanvas-close:hover {
  color: var(--offcanvas-accent);
}

#ss-offcanvas-filter {
  padding: 0.5rem var(--offcanvas-label-px);
  border-bottom: 1px solid var(--offcanvas-border);
  position: sticky;
  top: 56px; /* unterhalb des Header-Bereichs */
  background: var(--offcanvas-bg);
  z-index: 2;
}

#ss-menu-filter {
  width: 100%;
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--offcanvas-border);
  border-radius: 4px;
  background: var(--offcanvas-bg);
  color: var(--offcanvas-text);
  font-size: 0.85rem;
  font-family: inherit;
}

#ss-menu-filter:focus {
  outline: none;
  border-color: var(--offcanvas-accent);
}

#ss-menu-filter.is-hidden {
  display: none;
}

#ss-menu-list {
  list-style: none;
  padding: 0.5rem 0;
  margin: 0;
}

#ss-menu-list .is-filter-hidden {
  display: none !important;
}

#ss-menu-list .is-filter-match {
  background: rgba(37, 99, 235, 0.15);
  border-radius: 4px;
}

#ss-menu-list ul {
  list-style: none;
  padding: 0;
  margin: 0 0 0 1rem;
  border-left: 1px solid var(--offcanvas-border);
}

#ss-menu-list li {
  margin: 0;
}

#ss-menu-list .ss-menu-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--offcanvas-label-py) var(--offcanvas-label-px);
  font-size: var(--offcanvas-label-font);
  cursor: pointer;
  user-select: none;
}

#ss-menu-list .ss-menu-label:hover {
  background: rgba(37, 99, 235, 0.08);
}

#ss-menu-list .ss-menu-label.is-current {
  font-weight: 600;
  color: var(--offcanvas-accent);
}

#ss-menu-list .ss-menu-label .ss-menu-caret {
  display: inline-block;
  width: 0.75rem;
  font-size: 0.7rem;
  transition: transform 150ms ease;
  opacity: 0.6;
}

#ss-menu-list .ss-menu-label.is-expanded .ss-menu-caret {
  transform: rotate(90deg);
}

#ss-menu-list a {
  display: block;
  padding: 0.2rem var(--offcanvas-label-px);
  color: inherit;
  text-decoration: none;
  font-size: var(--offcanvas-link-font);
  border-radius: 4px;
  margin: 0 0.25rem;
}

#ss-menu-list a:hover {
  background: rgba(37, 99, 235, 0.1);
  color: var(--offcanvas-accent);
}

#ss-menu-list a.is-current {
  font-weight: 600;
  color: var(--offcanvas-accent);
  background: rgba(37, 99, 235, 0.1);
}

#ss-menu-list ul {
  /* Sub-Listen innerhalb von li: per Default zugeklappt */
}

#ss-menu-list li > ul {
  display: none;
}

#ss-menu-list li.is-expanded > ul {
  display: block;
}

#ss-menu-list .ss-menu-label:not(.has-children) {
  cursor: default;
}

#ss-menu-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.85rem;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 6px;
  color: #ffffff;
  cursor: pointer;
  font-size: 0.95rem;
  font-family: inherit;
  transition: background 150ms ease, border-color 150ms ease;
}

#ss-menu-toggle:hover {
  background: #ffffff;
  color: var(--offcanvas-accent);
  border-color: #ffffff;
}

#ss-menu-toggle:focus-visible {
  outline: 2px solid #ffffff;
  outline-offset: 2px;
}

/* Accessibility: respect reduced-motion */
@media (prefers-reduced-motion: reduce) {
  #ss-offcanvas,
  #ss-offcanvas-backdrop {
    transition: none;
  }
}