.ejercicios-intro {
      background: var(--paper-warm);
      border-bottom: 1px solid var(--line);
      padding: 54px 0;
    }

    .ejercicios-lista {
      padding: 45px 0 70px;
    }

    .ejercicio {
      margin-bottom: 32px;
      padding: 30px;
      border: 1px solid var(--line);
      background: var(--paper);
    }

    .ejercicio-cabecera {
      display: flex;
      align-items: center;
      gap: 18px;
      margin-bottom: 20px;
    }

    .ejercicio-numero {
      font-family: 'IBM Plex Mono', monospace;
      font-size: 1.5rem;
      font-weight: 600;
      min-width: 48px;
    }

    .ejercicio h2 {
      margin: 4px 0 0;
    }

    .consigna {
      line-height: 1.7;
      margin-bottom: 18px;
    }

    .editor {
      display: block;
      width: 100%;
      min-height: 190px;
      box-sizing: border-box;
      margin-top: 8px;
      padding: 16px;
      resize: vertical;
      border: 1px solid var(--line-dark);
      background: var(--tp);
      color: var(--paper);
      font-family: 'IBM Plex Mono', monospace;
      font-size: .95rem;
      line-height: 1.6;
    }

    .editor:focus {
      outline: 2px solid var(--brass);
      outline-offset: 2px;
    }

    .acciones {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 14px;
    }

    .acciones button {
      border: 1px solid var(--tp);
      padding: 11px 17px;
      cursor: pointer;
      font-family: 'IBM Plex Sans', sans-serif;
      font-weight: 600;
    }

    .btn-comprobar {
      background: var(--tp);
      color: var(--paper);
    }

    .btn-limpiar {
      background: transparent;
      color: var(--tp);
    }

    .btn-comprobar:hover,
    .btn-limpiar:hover {
      background: var(--brass);
      color: var(--tp);
    }

    .resultado {
      min-height: 24px;
      margin-top: 15px;
      font-weight: 600;
    }

    @media (max-width: 650px) {
      .ejercicio {
        padding: 20px;
      }

      .ejercicio-cabecera {
        align-items: flex-start;
      }
    }