/* ── Materiales section ─────────────────────────────── */
    .materiales-bloque {
      margin-bottom: 8px;
    }
    .materiales-bloque-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 10px;
    }
    .materiales-bloque-header h3 {
      margin: 0;
    }
    .materiales-bloque-header .btn-siguiente {
      margin: 0;
      padding: 8px 18px;
      font-size: 13px;
      white-space: nowrap;
    }
    .materiales-textarea {
      width: 100%;
      box-sizing: border-box;
      border: 1.5px solid #c5cfe8;
      border-radius: 8px;
      padding: 10px 14px;
      font-size: 14px;
      font-family: inherit;
      resize: vertical;
      transition: border-color 0.2s;
    }
    .materiales-textarea:focus {
      border-color: #1F3B6D;
      outline: none;
    }
    .loader-materiales {
      font-size: 13px;
      color: #1F3B6D;
      margin-bottom: 8px;
      font-style: italic;
    }

    /* ── Wizard navbar ──────────────────────────────────────── */
    #wiz-nav {
      position: fixed; top: 0; left: 0; right: 0; z-index: 300;
      height: 48px; background: var(--c-blue-700);
      display: flex; align-items: center; padding: 0 16px; gap: 12px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.18);
    }
    .wiz-nav-back {
      color: rgba(255,255,255,0.85); font-size: 13px; font-weight: 600;
      text-decoration: none; white-space: nowrap; padding: 5px 10px;
      border-radius: 6px; background: rgba(255,255,255,0.12);
      transition: background 0.15s;
    }
    .wiz-nav-back:hover { background: rgba(255,255,255,0.22); color: white; }
    .wiz-nav-curso {
      flex: 1; text-align: center; color: rgba(255,255,255,0.6);
      font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
      padding: 0 8px;
    }
    .wiz-nav-user { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
    #wiz-nav-nombre {
      color: rgba(255,255,255,0.85); font-size: 13px; font-weight: 500; white-space: nowrap;
    }
    .wiz-nav-logout {
      background: rgba(255,255,255,0.12); border: none; color: rgba(255,255,255,0.8);
      padding: 5px 12px; border-radius: 6px; font-size: 12px; font-weight: 600;
      font-family: inherit; cursor: pointer; transition: background 0.15s; white-space: nowrap;
    }
    .wiz-nav-logout:hover { background: rgba(255,255,255,0.22); color: white; }
    /* Empujar layout debajo del navbar */
    .layout { margin-top: 48px !important; height: calc(100vh - 48px) !important; }
    @media (max-width: 768px) {
      .sidebar { top: 48px !important; height: calc(100vh - 48px) !important; }
      .menu-toggle { top: 62px !important; }
      #wiz-nav-nombre { display: none; }
    }