/* ============================================================
   sidebar.css – Zentrale Sidebar-Styles für HelloPython.de
   
   Einbinden in jede HTML-Seite:
   <link rel="stylesheet" href="/python-Grundlagen/css/sidebar.css">
   
   Akzentfarbe pro Seite in der jeweiligen CSS-Datei setzen:
   :root { --accent: var(--yellow); }   ← Funktionen
   :root { --accent: var(--blue); }     ← Schleifen
   :root { --accent: var(--green); }    ← Syntax, VS Code
   :root { --accent: var(--orange); }   ← Datenstrukturen
   etc.
   ============================================================ */

/* ===== SIDEBAR ===== */
.sidebar {
  position: fixed;
  top: 56px;
  left: 0;
  width: var(--sidebar-w, 280px);
  height: fit-content;
  max-height: calc(100vh - 56px);
  overflow-y: auto;
  background: rgba(13,13,20,0.97);
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  border-radius: 0 0 14px 0;
  padding: 20px 0 24px;
  z-index: 100;
  transition: transform 0.3s ease;
}

.sidebar::-webkit-scrollbar { width: 3px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* ===== SIDEBAR BACK BUTTON ===== */
.sidebar-back {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 14px 16px;
  padding: 9px 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  text-decoration: none;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.sidebar-back:hover {
  border-color: var(--yellow);
  color: var(--yellow);
  background: rgba(245,200,66,0.06);
}
.sidebar-back-arrow { font-size: 14px; }

/* ===== DIVIDER & LABEL ===== */
.sidebar-divider {
  height: 1px;
  background: var(--border);
  margin: 10px 16px;
}
.sidebar-section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0 16px;
  margin-bottom: 5px;
  margin-top: 16px;
}

/* ===== LINKS ===== */
.sidebar-link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 0.18s, background 0.18s, border-left-color 0.18s, padding-left 0.18s;
}
.sidebar-link:hover {
  color: var(--text);
  background: rgba(255,255,255,0.05);
  border-left-color: var(--muted);
  padding-left: 20px;
}
.sidebar-link.active {
  color: var(--accent, var(--orange));
  background: rgba(255,255,255,0.04);
  border-left-color: var(--accent, var(--orange));
  padding-left: 20px;
}

/* ===== ICON & BADGE ===== */
.s-icon {
  font-size: 13px;
  width: 16px;
  text-align: center;
  flex-shrink: 0;
}
.s-badge {
  margin-left: auto;
  font-size: 9px;
  padding: 1px 5px;
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  color: var(--accent, var(--orange));
}

/* ===== OVERLAY (mobile) ===== */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  top: 56px;
  background: rgba(0,0,0,0.6);
  z-index: 99;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
    border-radius: 0;
    height: calc(100vh - 56px);
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay.open { display: block; }
}