.header{
  position: fixed;
  top: 40px;
  left: 60px;
  z-index: 9999;
}

.menu-icon{
  width: 45px;
  height: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  background: transparent;
  border: 0;
  padding: 0;
}
.menu-icon span{
  background: #fff;
  transition: background 0.25s ease;
}

.menu-icon.menu--dark span{
  background: #333;
}
.menu-icon span{
  display: block;
  height: 5px;
  width: 100%;
  background: #ffffff;
  border-radius: 4px;
  opacity: 0.9;
  transition: all 0.3s ease;
}

.sidebar-menu{
  position: fixed;
  top: 0;
  left: 0;
  width: 260px;
  height: 100vh;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(10px);
  box-shadow: 5px 0 25px rgba(0,0,0,0.15);
  transform: translateX(-100%);
  transition: transform 0.35s ease;
  z-index: 9998;
  padding-top: 2rem;
}

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

.sidebar-menu ul{ margin: 0; padding: 0; }
.sidebar-menu li{ list-style: none; }

.sidebar-menu a{
  display: block;
  padding: 1rem 1.5rem;
  font-size: 1.25rem;
  color: #222;
  text-decoration: none;
  font-family: var(--font-sans);
  transition: 0.25s ease;
}

.sidebar-menu a:hover{
  background: #333;
  color: #fff;
  padding-left: 2rem;
}

/* Icono a X cuando abierto */
.menu-icon.is-open span:nth-child(1){
  transform: translateY(13px) rotate(45deg);
}
.menu-icon.is-open span:nth-child(2){ opacity: 0; }
.menu-icon.is-open span:nth-child(3){
  transform: translateY(-13px) rotate(-45deg);
}

/* --- Ajustes móvil: header/burger no tapa contenido --- */
@media (max-width: 768px){
  .header{
    top: 14px;
    left: 14px;
  }

  .menu-icon{
    width: 36px;
    height: 26px;
  }

  .menu-icon span{
    height: 4px;
  }

  .sidebar-menu{
    width: min(86vw, 320px);
  }
}