/* Container principale */
.container-sistemi {
  display: flex;
  max-width: 980px;
  margin: 0 auto;
  padding: 1.2rem;
  gap: 2rem;
  align-items: flex-start;
  flex-direction: row;
  color: #e6e1d9;
  font-family: "Georgia", serif;
  background: transparent;
}

/* Sidebar */
.sistemi-sidebar {
  width: 260px;
  background: rgba(0, 0, 0, 0.7);
  padding: 1rem;
  border-radius: 8px;
  position: sticky;
  top: 20px;
  font-family: "Georgia", serif;
  color: #f6e7c1;
  box-shadow: 0 0 10px rgba(246, 231, 193, 0.3);
  transition: transform 0.3s ease-in-out;
  z-index: 1000;
}

/* Titolo sidebar */
.sistemi-sidebar h3 {
  margin-bottom: 1rem;
  font-size: 1.25rem;
  color: #f6e7c1;
  border-bottom: 1px solid rgba(246, 231, 193, 0.3);
  padding-bottom: 0.5rem;
}

/* Lista */
.sistemi-sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

/* Elementi lista */
.sistemi-sidebar li {
  margin: 0.5rem 0;
}

/* Link sidebar */
.sistemi-sidebar a {
  color: #d9c9a6;
  text-decoration: none;
  font-weight: normal;
  transition: color 0.3s;
}

/* Link attivo e hover */
.sistemi-sidebar li.active a,
.sistemi-sidebar a:hover {
  font-weight: bold;
  color: #f6e7c1;
  text-decoration: underline;
}

/* Contenuto principale */
.sistemi-content {
  flex: 1;
  max-width: 700px;
  font-size: 1.1rem;
  line-height: 1.6;
  color: #e6e1d9;
  font-family: "Georgia", serif;
}

/* Headings contenuto */
.sistemi-content h1,
.sistemi-content h2,
.sistemi-content h3 {
  font-family: "Palatino Linotype", "Book Antiqua", serif;
  color: #f6e7c1;
  margin-top: 1.5rem;
}

/* Link contenuto */
.sistemi-content a {
  color: #e6c996;
  text-decoration: none;
}

.sistemi-content a:hover {
  text-decoration: underline;
  color: #f6e7c1;
}

/* Pulsante toggle sidebar (mobile) */
.sidebar-toggle-button {
  display: none; /* nascosto di default */
  margin-top: 0.5rem;
  background: rgba(246, 231, 193, 0.9);
  border: none;
  padding: 0.5rem 1rem;
  font-weight: bold;
  color: #3a2d12;
  cursor: pointer;
  border-radius: 5px;
  z-index: 1100;
}

/* Responsive - mobile */
@media (max-width: 767px) {
  .container-sistemi {
    flex-direction: column;
    padding: 1rem;
  }

  .sistemi-sidebar {
    width: 100%;
    max-width: none;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    padding: 2rem 1.5rem;
    background: rgba(0, 0, 0, 0.9);
    color: #f6e7c1;
    transform: translateX(-110%);
    border-right: 2px solid #f6e7c1;
    box-shadow: 3px 0 15px rgba(0,0,0,0.6);
  }

  .sistemi-sidebar.active {
    transform: translateX(0);
  }

  .sidebar-toggle-button {
    display: block; /* visibile solo in mobile */
  }

  .sistemi-content {
    max-width: 100%;
    margin-top: 3rem;
  }
}

.citazione {
  border-left: 4px solid #e7c818;
  padding: 0.8em 1.2em;
  margin: 1.5em 0;
  font-style: italic;
  color: #f5aa0a;
  background: #3f3f3f;
}
.citazione footer {
  margin-top: 0.5em;
  text-align: right;
  font-weight: bold;
}

.sistemi-sidebar .sidebar-section h4 {
  margin-bottom: 0.5rem;
  font-weight: bold;
  color: #f6e7c1;
}

.sistemi-sidebar .sidebar-section ul li {
  padding-left: 1rem;
}