/* Estilos para el menú hamburguesa y navegación lateral */
#hamburger-menu {
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 2000;
  width: 48px;
  height: 48px;
  background: #ffeb3b;
  border: 3px solid #222;
  border-radius: 8px;
  outline: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  box-shadow: 0 2px 12px rgba(0,0,0,0.12);
}
#hamburger-menu span {
  display: block;
  width: 28px;
  height: 5px;
  background: #111;
  margin: 5px 0;
  border-radius: 2px;
  transition: 0.3s;
}
#side-nav {
  position: fixed;
  top: 0;
  left: -230px;
  width: 220px;
  height: 100vh;
  background: #fff;
  box-shadow: 2px 0 8px rgba(0,0,0,0.08);
  z-index: 2100;
  display: flex;
  flex-direction: column;
  transition: left 0.3s;
  padding-top: 60px;
}
#side-nav.active {
  left: 0;
}
#side-nav .close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  font-size: 24px;
  color: #4a90e2;
  cursor: pointer;
}
#side-nav nav {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 0 24px;
}
#side-nav nav button {
  background: none;
  border: none;
  color: #333;
  font-size: 18px;
  text-align: left;
  padding: 8px 0;
  cursor: pointer;
  transition: color 0.2s;
}
#side-nav nav button.active, #side-nav nav button:hover {
  color: #4a90e2;
  font-weight: bold;
}
@media (max-width: 600px) {
  #side-nav { width: 80vw; }
}