:root{
  --menu-width:280px;
  --menu-bg:#ffffff;
  --menu-border:#e2e8f0;
  --menu-shadow:0 20px 45px rgba(15,23,42,.15);
  --menu-text:#0f172a;
  --menu-muted:#6b7280;
  --menu-accent:#7c3aed;
}

.burger{
  position:fixed;
  top:18px;
  left:18px;
  z-index:1100;
  background:#fff;
  border:1px solid rgba(226,232,240,.9);
  border-radius:14px;
  padding:10px 14px;
  font-size:1.5rem;
  font-weight:700;
  color:var(--menu-text);
  box-shadow:0 8px 18px rgba(15,23,42,.12);
  transition:transform .2s ease, box-shadow .2s ease;
}

.burger:hover{
  transform:translateY(-1px);
  box-shadow:0 16px 30px rgba(15,23,42,.18);
}

.menu-overlay{
  position:fixed;
  inset:0;
  background:rgba(15,23,42,.35);
  opacity:0;
  pointer-events:none;
  transition:opacity .25s ease;
  z-index:999;
}

body.menu-open .menu-overlay{
  opacity:1;
  pointer-events:auto;
}

body.menu-open{overflow:hidden;}

.sidebar{
  position:fixed;
  top:0;
  left:-320px;
  width:var(--menu-width);
  height:100%;
  background:var(--menu-bg);
  border-right:1px solid var(--menu-border);
  box-shadow:var(--menu-shadow);
  padding:24px 20px 32px;
  transition:left .28s ease;
  z-index:1000;
  display:flex;
  flex-direction:column;
  gap:18px;
}

.sidebar.active{left:0;}

.close-btn{
  font-size:1.5rem;
  text-align:right;
  color:var(--menu-muted);
  background:none;
  border:none;
  padding:0;
  cursor:pointer;
}

.sidebar ul{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:12px;
}

.sidebar li{
  margin:0;
}

.sidebar a{
  display:block;
  padding:12px 16px;
  border:1px solid rgba(226,232,240,.9);
  border-radius:12px;
  color:var(--menu-text);
  font-weight:600;
  text-align:center;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}

.sidebar a:hover{
  background:rgba(124,58,237,.08);
  color:var(--menu-accent);
  border-color:rgba(124,58,237,.35);
}

.sidebar.menu--student a{
  border-color:rgba(124,58,237,.3);
}

.sidebar.menu--student a:hover{
  background:#f3e8ff;
}

.sidebar.menu--teacher a{
  border-color:rgba(16,185,129,.3);
}

.sidebar.menu--teacher a:hover{
  background:rgba(16,185,129,.12);
  color:#0f766e;
}

.sidebar.menu--admin a{
  border-color:rgba(248,113,113,.3);
}

.sidebar.menu--admin a:hover{
  background:rgba(248,113,113,.12);
  color:#b91c1c;
}

.sidebar.menu--public a:hover{
  background:rgba(99,102,241,.12);
  color:#3730a3;
}

/* Sidebar pleine largeur sur mobile et tablette (< desktop) */
@media (max-width: 1023px) {
  .sidebar {
    width: 100% !important;
    left: -100%; /* cache complètement la sidebar pleine largeur */
  }
}

@media (prefers-reduced-motion:reduce){
  .burger,
  .menu-overlay,
  .sidebar{
    transition:none;
  }
}

/* =====================================================
   Sidebar permanente — desktop (≥1024px)
   ===================================================== */
@media (min-width: 1024px) {
  .sidebar {
    left: 0 !important;
    box-shadow: none;
    border-right: 1px solid var(--border, #e2e8f0);
  }

  .burger { display: none; }

  .close-btn { display: none; }

  .menu-overlay { display: none !important; }

  body { padding-left: 280px; }

  body.menu-open { overflow: auto; }
}

/* ── Bouton thème dans la sidebar ──────────────── */
/* Annule le position:fixed de style.css quand le bouton est dans la nav */
.sidebar .theme-toggle {
  position: static;
  bottom: auto;
  right: auto;
  width: 44px;
  height: 44px;
  margin: 8px auto 20px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--menu-border, #e2e8f0);
  background: transparent;
  color: var(--menu-text, #0f172a);
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: none;
  transform: none;
  transition: background .15s, border-color .15s;
}
.sidebar .theme-toggle:hover {
  background: rgba(124, 58, 237, .08);
  border-color: rgba(124, 58, 237, .3);
  transform: none;
  box-shadow: none;
}

/* Dark mode — sidebar (Neon Glass) */
[data-theme="dark"] .sidebar {
  background: rgba(15,8,30,.62);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-color: var(--border, rgba(168,85,247,.28));
  --menu-bg: rgba(15,8,30,.62);
  --menu-text: #f5f3ff;
  --menu-border: rgba(168,85,247,.28);
}

[data-theme="dark"] .sidebar a {
  border-color: rgba(168,85,247,.18);
}
[data-theme="dark"] .sidebar a:hover {
  background: rgba(168,85,247,.12);
  border-color: rgba(168,85,247,.5);
  color: #e9d5ff;
  box-shadow: 0 0 18px rgba(168,85,247,.25);
}

[data-theme="dark"] .burger {
  background: rgba(15,8,30,.62);
  backdrop-filter: blur(20px);
  color: #f5f3ff;
  border-color: rgba(168,85,247,.28);
}

/* ── Sous-menus dépliables (ex: Pédagogie) ────────── */
.has-submenu > .submenu-toggle {
  position: relative;
}

.has-submenu > .submenu-toggle::after {
  content: "";
  position: absolute;
  right: 20px;
  top: 50%;
  width: 8px;
  height: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateY(-70%) rotate(45deg);
  transition: transform .2s ease;
}

.has-submenu.open > .submenu-toggle::after {
  transform: translateY(-30%) rotate(225deg);
}

.sidebar .submenu {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: none;
  flex-direction: column;
  gap: 8px;
}

.sidebar .has-submenu.open .submenu {
  display: flex;
}

.submenu a {
  padding: 10px 16px;
  font-size: .9rem;
  font-weight: 500;
  margin-left: 14px;
}

/* ── Badge utilisateur connecté (haut à droite) ─── */
.user-badge {
  position: fixed;
  top: 18px;
  right: 20px;
  z-index: 1100;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  font-size: .9rem;
}

.user-badge__name {
  font-weight: 700;
  color: var(--menu-text, #0f172a);
  text-decoration: none;
}

.user-badge__name:hover {
  color: var(--menu-accent, #7c3aed);
  text-decoration: underline;
}

.user-badge__class {
  font-size: .78rem;
  color: var(--menu-muted, #6b7280);
}

.user-badge__class:empty {
  display: none;
}

[data-theme="dark"] .user-badge__name {
  color: #f5f3ff;
}

@media (min-width: 1024px) {
  .user-badge {
    right: 32px;
  }
}

/* ── Topbar (pages sans sidebar) ───────────────── */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 52px;
  display: flex;
  align-items: center;
  padding: 0 20px;
  background: var(--surface, #fff);
  border-bottom: 1px solid var(--border, #e2e8f0);
  z-index: 100;
}

.back-link {
  font-weight: 600;
  font-size: .88rem;
  color: var(--ink, #0f172a);
  text-decoration: none;
  transition: color .15s;
}

.back-link:hover { color: var(--accent, #7c3aed); }

@media (min-width: 1024px) {
  body.no-sidebar { padding-left: 0 !important; }
}

body.no-sidebar { padding-top: 52px; }