:root {
      --bg-color: #fcfcfc;
      --primary-color: #0A4FA3;
      --secondary-color: #4A7EBB;
      --asset-color: #fdb913;
      --highlight-color: #349df3;
      --black-font-color: #1a1a1a;
      --border-color: #3d3d3d;

      --success-color: #1f8a4c;
      --error-color: #d64545;
      --success-bg: #eaf7f0;
      --error-bg: #fdeeee;
      --panel-radius: 1.25rem;
      --option-radius: 1rem;
      --panel-shadow: 0 18px 40px rgba(10, 79, 163, 0.1);
      --option-shadow: 0 10px 24px rgba(10, 79, 163, 0.08);
      --transition: 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
    }

    * { box-sizing: border-box; }



    .mcq-panel {
      width: min(100%, 760px);
      background: transparent;
     
      
      padding: clamp(1rem, 2.5vw, 1.75rem);
      display: grid;
      gap: 1rem;
      position: relative;
      overflow: hidden;
      isolation: isolate;
    }



    .mcq-options {
      display: grid;
      grid-template-columns: 1fr;
      gap: 0.875rem;
    }

    .mcq-option {
      appearance: none;
      width: 100%;
      border: 2px solid rgba(10, 79, 163, 0.16);
      border-radius: var(--option-radius);
      background: #fff;
      color: var(--black-font-color);
      padding: 1rem 1.1rem;
      display: flex;
      align-items: center;
      gap: 0.9rem;
      text-align: left;
      cursor: pointer;
      min-height: 60px;
      box-shadow: var(--option-shadow);
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition), color var(--transition);
      position: relative;
      overflow: hidden;
    }

    .mcq-option:hover {
      transform: translateY(-2px);
      border-color: var(--highlight-color);
      box-shadow: 0 14px 28px rgba(52, 157, 243, 0.14);
      background: #fff;
      color: var(--black-font-color);
    }

    .mcq-option:focus-visible {
      outline: 3px solid rgba(253, 185, 19, 0.75);
      outline-offset: 3px;
    }

    .option-badge {
      flex: 0 0 2.35rem;
      width: 2.35rem;
      height: 2.35rem;
      border-radius: 999px;
      display: inline-grid;
      place-items: center;
      font-weight: 700;
      color: #fff;
      background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
      box-shadow: inset 0 -2px 8px rgba(255,255,255,0.16);
    }

    .option-text {
      font-size: clamp(0.98rem, 2vw, 1.05rem);
      font-weight: 600;
      line-height: 1.45;
      flex: 1;
    }

    .option-state-icon {
      width: 1.5rem;
      height: 1.5rem;
      border-radius: 999px;
      display: inline-grid;
      place-items: center;
      font-size: 0.95rem;
      font-weight: 800;
      color: transparent;
      background: rgba(10, 79, 163, 0.08);
      transition: var(--transition);
    }

    .mcq-option.correct {
      border-color: var(--success-color);
      background: linear-gradient(135deg, rgba(31, 138, 76, 0.12), #fff 65%);
      animation: correctPulse 520ms ease;
    }

    .mcq-option.correct .option-state-icon {
      color: #fff;
      background: var(--success-color);
    }

    .mcq-option.wrong {
      border-color: var(--error-color);
      background: linear-gradient(135deg, rgba(214, 69, 69, 0.12), #fff 65%);
      animation: wrongShake 420ms ease;
    }

    .mcq-option.wrong .option-state-icon {
      color: #fff;
      background: var(--error-color);
    }

    .mcq-option.reveal-correct {
      border-color: var(--asset-color);
      background: linear-gradient(135deg, rgba(253, 185, 19, 0.2), #fff 68%);
      animation: revealGlow 700ms ease;
    }

    .mcq-option.reveal-correct .option-state-icon {
      color: var(--black-font-color);
      background: var(--asset-color);
    }

    .mcq-option[disabled] {
      cursor: not-allowed;
      opacity: 0.96;
    }

    .mcq-feedback {
      min-height: 3.25rem;
      border-radius: 0.95rem;
      padding: 0.95rem 1rem;
      border: 1px dashed rgba(10, 79, 163, 0.18);
      background: rgba(52, 157, 243, 0.06);
      color: var(--black-font-color);
      display: flex;
      align-items: center;
      font-size: 0.96rem;
      line-height: 1.45;
      opacity: 0;
      transform: translateY(10px);
      transition: opacity var(--transition), transform var(--transition), background var(--transition), border-color var(--transition);
    }

    .mcq-feedback.show {
      opacity: 1;
      transform: translateY(0);
    }

    .mcq-feedback.success {
      background: var(--success-bg);
      border-color: rgba(31, 138, 76, 0.3);
      animation: feedbackPop 400ms ease;
    }

    .mcq-feedback.error {
      background: var(--error-bg);
      border-color: rgba(214, 69, 69, 0.3);
      animation: feedbackPop 400ms ease;
    }

    @keyframes wrongShake {
      0%, 100% { transform: translateX(0); }
      20% { transform: translateX(-7px); }
      40% { transform: translateX(7px); }
      60% { transform: translateX(-5px); }
      80% { transform: translateX(5px); }
    }

    @keyframes correctPulse {
      0% { transform: scale(1); box-shadow: 0 0 0 rgba(31, 138, 76, 0); }
      50% { transform: scale(1.01); box-shadow: 0 0 0 10px rgba(31, 138, 76, 0.08); }
      100% { transform: scale(1); box-shadow: 0 10px 24px rgba(10, 79, 163, 0.08); }
    }

    @keyframes revealGlow {
      0% { box-shadow: 0 0 0 rgba(253, 185, 19, 0); }
      50% { box-shadow: 0 0 0 10px rgba(253, 185, 19, 0.12); }
      100% { box-shadow: 0 10px 24px rgba(10, 79, 163, 0.08); }
    }

    @keyframes feedbackPop {
      0% { transform: translateY(10px) scale(0.98); }
      100% { transform: translateY(0) scale(1); }
    }

    @media (min-width: 640px) {
      .mcq-options.two-col {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }
    }

    @media (max-width: 479px) {
      .mcq-option {
        padding: 0.9rem;
        gap: 0.75rem;
      }

      .option-badge {
        width: 2rem;
        height: 2rem;
        flex-basis: 2rem;
      }
    }