/* ─── Reset mínimo para demo ─── */
    *,
    *::before,
    *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: 'Segoe UI', system-ui, sans-serif;
      background: #f0f2f5;
    }

    .demo-body {
      padding-top: 72px;
    }

    .demo-hero {
      max-width: 860px;
      margin: 4rem auto;
      padding: 3rem 2rem;
      background: #fff;
      border-radius: 12px;
      text-align: center;
      box-shadow: 0 2px 12px rgba(0, 0, 0, .08);
    }

    .demo-hero h1 {
      font-size: 1.6rem;
      color: #1a2a4a;
      margin-bottom: .5rem;
    }

    .demo-hero p {
      color: #666;
      font-size: .95rem;
    }

    /* ══════════════════════════════════════════════════════════
       ITN NAVBAR  — todos los selectores llevan el prefijo
       .itn-nav para NO colisionar con ningún otro framework.
       ══════════════════════════════════════════════════════════ */

    /* ── Variables de la marca ── */
    :root {
      --itn-primary: #611232;
      --itn-accent: #b52458;
      --itn-highlight: #F0A500;
      --itn-text: #FFFFFF;
      --itn-text-dim: rgba(255, 255, 255, .70);
      --itn-bg-drop: #3d0c20;
      --itn-border: rgba(255, 255, 255, .10);
      --itn-h: 64px;
      --itn-font: 'Segoe UI', system-ui, sans-serif;
      --itn-radius: 6px;
      --itn-shadow: 0 4px 20px rgba(0, 0, 0, .25);
      --itn-transition: .2s ease;
    }

    /* ── Barra principal ── */
    .itn-nav {
      position: absolute;
      left: 0;
      right: 0;
      z-index: 9999;
      height: var(--itn-h);
      background: var(--itn-primary);
      box-shadow: var(--itn-shadow);
      display: flex;
      align-items: center;
      font-family: var(--itn-font);
    }

    /* Franja roja inferior decorativa */
    .itn-nav::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, var(--itn-accent) 0%, var(--itn-highlight) 100%);
    }

    .itn-nav__inner {
      width: 100%;
      max-width: 1440px;
      margin: 0 auto;
      padding: 0 1.5rem;
      display: flex;
      align-items: center;
      gap: 0;
    }

    /* ── Logo / Brand ── */
    .itn-nav__brand {
      display: flex;
      align-items: center;
      gap: .6rem;
      text-decoration: none;
      flex-shrink: 0;
      margin-right: 1.25rem;
    }

    .itn-nav__brand img {
      height: 36px;
      width: auto;
    }

    .itn-nav__brand-text {
      display: flex;
      flex-direction: column;
      line-height: 1.1;
    }

    .itn-nav__brand-text span:first-child {

      font-weight: 600;
      letter-spacing: .08em;
      color: var(--itn-highlight);
      text-transform: uppercase;
    }

    .itn-nav__brand-text span:last-child {

      font-weight: 700;
      color: var(--itn-text);
    }

    /* ── Botón hamburguesa (mobile) ── */
    .itn-nav__toggler {
      display: none;
      align-items: center;
      gap: .5rem;
      margin-left: auto;
      padding: .45rem .7rem;
      background: transparent;
      border: 1px solid var(--itn-border);
      border-radius: var(--itn-radius);
      color: var(--itn-text);

      font-family: var(--itn-font);
      cursor: pointer;
      transition: background var(--itn-transition);
    }

    .itn-nav__toggler:hover {
      background: rgba(255, 255, 255, .10);
    }

    .itn-nav__toggler-icon {
      width: 22px;
      height: 18px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .itn-nav__toggler-icon span {
      display: block;
      height: 2px;
      background: var(--itn-text);
      border-radius: 2px;
      transition: transform .3s ease, opacity .3s ease, width .3s ease;
    }

    /* Animación X */
    .itn-nav__toggler[aria-expanded="true"] .itn-nav__toggler-icon span:nth-child(1) {
      transform: translateY(8px) rotate(45deg);
    }

    .itn-nav__toggler[aria-expanded="true"] .itn-nav__toggler-icon span:nth-child(2) {
      opacity: 0;
      width: 0;
    }

    .itn-nav__toggler[aria-expanded="true"] .itn-nav__toggler-icon span:nth-child(3) {
      transform: translateY(-8px) rotate(-45deg);
    }

    /* ── Contenedor colapsable ── */
    .itn-nav__collapse {
      display: flex;
      align-items: center;
      flex: 1;
      overflow: visible;
    }

    /* ── Lista de items ── */
    .itn-nav__list {
      list-style: none;
      display: flex;
      align-items: center;
      flex-wrap: nowrap;
      gap: 0;
      padding: 0;
      margin: 0;
    }

    /* ── Item genérico ── */
    .itn-nav__item {
      position: relative;
    }

    /* ── Enlace de primer nivel ── */
    .itn-nav__link {
      display: flex;
      align-items: center;
      gap: .3rem;
      padding: 0 .72rem;
      height: var(--itn-h);
      color: var(--itn-text-dim);
      text-decoration: none;
      font-weight: 600;
      white-space: nowrap;
      letter-spacing: .02em;
      transition: color var(--itn-transition), background var(--itn-transition);
      border-bottom: 3px solid transparent;
      margin-bottom: -3px;
      /* cancela el ::after de la barra */
    }

    .itn-nav__link:hover,
    .itn-nav__link:focus {
      color: var(--itn-text);
      background: rgba(255, 255, 255, .07);
      border-bottom-color: var(--itn-highlight);
      outline: none;
    }

    .itn-nav__link--active {
      color: var(--itn-text);
      border-bottom-color: var(--itn-highlight);
    }

    .itn-nav__link--icon {
      font-size: 2rem;
      padding: 0 .9rem;
    }

    /* ── Caret ── */
    .itn-nav__caret {
      opacity: .7;
      transition: transform var(--itn-transition);
      flex-shrink: 0;
    }

    .itn-nav__item--open>.itn-nav__link .itn-nav__caret {
      transform: rotate(180deg);
    }

    /* ── Menú desplegable ── */
    .itn-nav__dropdown {
      display: none;
      position: absolute;
      top: calc(var(--itn-h) - 3px);
      left: 0;
      min-width: 230px;
      background: var(--itn-bg-drop);
      border: 1px solid var(--itn-border);
      border-top: 3px solid var(--itn-accent);
      border-radius: 0 0 var(--itn-radius) var(--itn-radius);
      box-shadow: var(--itn-shadow);
      padding: .4rem 0;
      z-index: 10000;
      animation: itn-fadeDown .18s ease forwards;
    }

    @keyframes itn-fadeDown {
      from {
        opacity: 0;
        transform: translateY(-6px);
      }

      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .itn-nav__item--open>.itn-nav__dropdown {
      display: block;
    }

    /* ── Items dentro del dropdown ── */
    .itn-nav__dropdown-item {
      display: block;
      padding: .45rem 1.1rem;
      color: var(--itn-text-dim);
      text-decoration: none;
      font-weight: 500;
      transition: background var(--itn-transition), color var(--itn-transition);
      white-space: nowrap;
    }

    .itn-nav__dropdown-item:hover,
    .itn-nav__dropdown-item:focus {
      background: rgba(255, 255, 255, .10);
      color: var(--itn-text);
      padding-left: 1.4rem;
      outline: none;
    }

    /* ── Encabezados de sección dentro del dropdown ── */
    .itn-nav__dropdown-header {
      display: flex;
      align-items: center;
      gap: .5rem;
      padding: .7rem 1.1rem .3rem;
      color: var(--itn-highlight);
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: .1em;
    }

    .itn-nav__dropdown-header::after {
      content: '';
      flex: 1;
      height: 1px;
      background: var(--itn-border);
    }

    /* Separador */
    .itn-nav__dropdown-divider {
      height: 1px;
      background: var(--itn-border);
      margin: .35rem .8rem;
    }

    /* ══════════════════════════════════
       RESPONSIVE — Mobile < 1200px
       ══════════════════════════════════ */
    @media (max-width: 1199px) {
      .contenedorAccesibilidad {
        width: 50%;
      }

      .itn-nav__toggler {
        display: flex;
      }

      .itn-nav__collapse {
        display: none;
        position: fixed;
        top: var(--itn-h);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--itn-primary);
        overflow-y: auto;
        padding: .5rem 0 2rem;
        flex-direction: column;
        align-items: flex-start;
        border-top: 3px solid var(--itn-accent);
        animation: itn-slideIn .22s ease forwards;
      }

      @keyframes itn-slideIn {
        from {
          opacity: 0;
          transform: translateX(-12px);
        }

        to {
          opacity: 1;
          transform: translateX(0);
        }
      }

      .itn-nav__collapse--open {
        display: flex;
      }

      .itn-nav__list {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
        gap: 0;
      }

      .itn-nav__link {
        height: auto;
        padding: .75rem 1.25rem;
        border-bottom: none;
        border-left: 3px solid transparent;
        margin-bottom: 0;
        justify-content: space-between;
      }

      .itn-nav__link:hover,
      .itn-nav__link:focus {
        border-bottom: none;
        border-left-color: var(--itn-highlight);
      }

      .itn-nav__link--icon {
        font-size: 2rem;
        justify-content: flex-start;
      }

      /* Dropdown en mobile: accordion */
      .itn-nav__dropdown {
        position: static;
        display: none;
        border-top: none;
        border-radius: 0;
        box-shadow: none;
        background: rgba(0, 0, 0, .15);
        padding: .25rem 0;
        animation: none;
        border: none;
        border-left: 3px solid var(--itn-accent);
        margin-left: 1rem;
      }

      .itn-nav__item--open>.itn-nav__dropdown {
        display: block;
      }

      .itn-nav__dropdown-item {
        padding: .5rem 1.25rem;
      }

      .itn-nav__dropdown-item:hover {
        padding-left: 1.5rem;
      }

      .itn-nav__dropdown-header {
        padding-top: .6rem;
      }
    }

    .itn-nav__list,
    .itn-nav__dropdown {
      list-style: none;
      padding-left: 0;
      padding-right: 30px;
      padding-left: 5px;
    }

    .itn-nav--sticky {
      position: fixed !important;
      top: 0;
      margin-top: 82px;
      animation: itn-slideDown .3s ease forwards;
    }

    /* ══════════════════════════════════
       RESPONSIVE — Mobile < 1200px
       ══════════════════════════════════ */
    @media (min-width: 1200px) {


      .itn-nav--sticky {
        position: fixed !important;
        top: 0;
        margin-top: 68px;
        animation: itn-slideDown .3s ease forwards;
      }    
    }

    @media (max-width: 1199px) {


      .itn-nav--sticky {
        position: fixed !important;
        top: 0!important;
        margin-top: 112px!important;
        animation: itn-slideDown .3s ease forwards;
      }

      .itn-nav__collapse {
        margin-top: 112px;
      }
    }



    @media (max-width: 789px) {

    .contenedorAccesibilidad {
        width: 75%;
    }
      .itn-nav--sticky {
        position: fixed !important;
        top: 0;
        margin-top: 60px;
        animation: itn-slideDown .3s ease forwards;
      }

      .itn-nav__collapse {
        margin-top: 60px;
      }
    }


    .plecaTECNM {
      margin-left: 25px;
    }

    .contenedorAccesibilidad {
      top: 40%;
    }