:root {
    --primary: #f97316; /* Arancione fisso */
    --text-light-bg: #ffffff; /* Testo su sfondo scuro */
    --text-dark-bg: #000000;  /* Testo su sfondo chiaro */
    --bg-light: #ffffff;       /* Sfondo chiaro */
    --bg-dark: #000000;        /* Sfondo scuro */
  }
  
  body[data-theme="light"] {
    background-color: var(--bg-light);
    color: var(--text-dark-bg);
    transition: background-color 0.3s ease, color 0.3s ease;
  }
  
  body[data-theme="dark"] {
    background-color: var(--bg-dark);
    color: var(--text-light-bg);
    transition: background-color 0.3s ease, color 0.3s ease;
  }
  
  /* Mantenere immutati i box-sizing, margini e padding */
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  /* Corpo pagina: Flex verticale e altezza minima */
  body {
    font-family: system-ui, sans-serif;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
  }
  
  /* HEADER */
  header {
    background-color: var(--primary);
    color: var(--text-light-bg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    position: relative;
    user-select: none;
  }
  
  .logo {
    font-size: 1.6rem;
    font-weight: bold;
  }
  
  .center-btn {
    display: flex;
    justify-content: center;
  }
  

  .small-btn {
    font-size: 0.85rem;
    padding: 6px 12px;
    margin-left: 0.5rem;
    border-radius: 8px;
  }  
  
  /* Menu area (toggle e tema) */
  .menu-area {
    display: flex;
    align-items: center;
    gap: 1rem;
  }
  
  /* Pulsante cambio tema */
  .theme-toggle {
    padding: 6px 10px;
    font-size: 0.9rem;
    border-radius: 8px;
    border: none;
    background: var(--text-light-bg);
    color: var(--primary);
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease, color 0.3s ease;
  }
  
  body[data-theme="dark"] .theme-toggle {
    background: var(--primary);
    color: var(--text-light-bg);
  }
  
  /* Pulsante hamburger */
  .menu-toggle {
    width: 28px;
    height: 20px;
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    z-index: 1001;
  }
  
  .menu-toggle span {
    height: 3px;
    background: var(--text-light-bg);
    border-radius: 3px;
    transition: all 0.3s ease;
  }
  
  .menu-toggle.active span:nth-child(1) {
    transform: translateY(8.5px) rotate(45deg);
  }
  
  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .menu-toggle.active span:nth-child(3) {
    transform: translateY(-8.5px) rotate(-45deg);
  }
  
  body[data-theme="light"] .menu-toggle span {
    background: var(--text-dark-bg);
  }
  
  /* NAV fullscreen */
  nav.fullscreen-menu {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.85);
    color: var(--text-light-bg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 1000;
  }
  
  nav.fullscreen-menu.active {
    opacity: 1;
    pointer-events: auto;
  }
  
  nav.fullscreen-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: center;
  }
  
  nav.fullscreen-menu li + li {
    margin-top: 20px;
  }
  
  nav.fullscreen-menu a {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s ease;
  }
  
  nav.fullscreen-menu a:hover,
  nav.fullscreen-menu a:focus {
    text-decoration: underline;
    outline: none;
  }
  
  /* MAIN */
  main {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
  }
  
  /* Content box con backdrop blur */
  .content-box {
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 20px;
    max-width: 500px;
    text-align: center;
    color: var(--text-light-bg);
    box-shadow: 0 0 10px rgba(0,0,0,0.4);
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  }
  
  body[data-theme="light"] .content-box {
    background: rgba(255, 255, 255, 0.8);
    color: var(--text-dark-bg);
    border: 2px solid rgba(0, 0, 0, 0.15);
    box-shadow: 0 0 15px rgba(0,0,0,0.1);
  }

  
  
  /* Titolo */
  .content-box h1 {
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
  }
  
  /* Pulsanti principali */
  .btn {
    display: inline-block;
    margin: 10px;
    padding: 12px 20px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-light-bg);
    background-color: var(--primary);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    text-decoration: none;
  }
  
  .btn:hover,
  .btn:focus {
    background-color: #c2410c;
    outline: none;
  }
  
  /* FOOTER */
  footer {
    background: var(--primary);
    color: var(--text-light-bg);
    text-align: center;
    padding: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.3);
  }
  
  @media (max-width: 480px) {
    header {
      flex-direction: column;
      align-items: flex-start;
      padding: 1rem;
    }
  
    .logo {
      margin-bottom: 0.5rem;
    }
  
    .menu-area {
      width: 100%;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 0.5rem;
    }
  
    .menu-area .theme-toggle,
    .menu-toggle {
      flex-shrink: 0;
    }
  
    .content-box {
      padding: 1.2rem;
      margin: 1rem;
      width: 100%;
      max-width: 500px;
    }
  
    main {
      padding: 1rem;
    }
  
    .content-box h1 {
      font-size: 1.8rem;
    }
  
    .btn {
      width: 100%;
      max-width: 280px;
      margin: 0.5rem 0;
    }
  
    footer {
      font-size: 0.9rem;
      padding: 0.8rem;
      text-align: center;
    }
  
    nav.fullscreen-menu ul {
      padding: 4rem 1rem;
    }
  
    nav.fullscreen-menu ul li {
      margin: 1rem 0;
    }
  }