:root{
  --bg: #070707;
  --text: #e9eef2;
  --muted: #a8a8a8;
  --neon-cyan: #00f0ea;
  --transition: 180ms cubic-bezier(.2,.9,.2,1);
}

.menu-icon{
  width: 44px;
  height: 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  cursor: pointer;
  padding: 6px;
  flex-shrink: 0;
}

.menu-icon span{
  display: block;
  height: 3px;
  border-radius: 4px;
  background: linear-gradient(90deg, #00ffd0, #a44cff);
  box-shadow: 0 0 12px rgba(0,255,200,0.15);
}

/* Side menu container */
.side-menu{
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  width: 320px;
  max-width: 86vw;
  background: linear-gradient(180deg, rgba(0,0,0,0.94), rgba(0,0,0,0.9));
  z-index: 80;
  padding: 18px;

  transform: translateX(-100%);
  transition: transform 420ms cubic-bezier(.18,.89,.32,1.28);
  box-shadow: 8px 0 40px rgba(0,0,0,0.6);
  will-change: transform;
  touch-action: pan-y;
}

.side-menu.open{
  transform: translateX(0);
}

.side-menu.dragging{
  transition: none !important;
}

/* Overlay */
body.side-open::before{
  content: "";
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 70;
}

.side-menu .menu-header h2{
  margin: 0 0 12px;
  color: var(--text);
}

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

.menu-list a{
  color: var(--muted);
  text-decoration: none;
  padding: 10px;
  border-radius: 8px;
  display: block;
}

.menu-list a:hover{
  background: rgba(255,255,255,0.02);
  color: var(--text);
}

/* Current item highlight */
.side-menu .menu-list a.current{
  position: relative;
  z-index: 2;
  color: var(--text);
  transition: background 200ms var(--transition), box-shadow 200ms var(--transition), color 120ms var(--transition);
}

.side-menu.open .menu-list a.current{
  background: linear-gradient(90deg, rgba(0,240,234,0.12), rgba(0,160,255,0.06));
  color: #041218;
  box-shadow: 0 8px 28px rgba(0,240,234,0.10), inset 0 0 14px rgba(0,240,234,0.04);
  border-left: 4px solid var(--neon-cyan);
  padding-left: 12px;
  border-radius: 8px;
}

.side-menu.open .menu-list a.current::before{
  content: "";
  position: absolute;
  left: 8px;
  top: 50%;
  transform: translateY(-50%);
  height: 36px;
  width: 2px;
  background: linear-gradient(180deg, rgba(0,240,234,0.85), rgba(0,160,255,0.55));
  border-radius: 2px;
  opacity: 0.6;
  pointer-events: none;
}

/* Side panel right border accent */
#sideMenu::after{
  content: "";
  position: absolute;
  top: 12px;
  bottom: 12px;
  right: 0;
  width: 1px;
  border-radius: 2px;
  background: linear-gradient(180deg, #fff17a, #ffd300);
  box-shadow: 0 0 12px rgba(255,215,0,0.12);
  pointer-events: none;
  z-index: 999;
}

#sideMenu:not(.open)::after{
  opacity: 0;
  transition: opacity 160ms ease;
}

#sideMenu.open::after{
  opacity: 1;
  transition: opacity 160ms ease;
}

@media (max-width: 880px){
  .side-menu{
    width: 260px;
  }
}