* {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: "Poppins", sans-serif;
      }

      :root {
        --primary-color: #ff6b6b;
        --secondary-color: #ff8e8e;
        --accent-color: #ffd3b6;
        --light-pastel: #ffaaa5;
        --dark-pastel: #d45d79;
        --white: #ffffff;
        --text-color: #333;
        --correct-color: #a8e6cf;
        --incorrect-color: #ffaaa5;
        --background: #ffe6e6;
        --progress-bar: #4caf50;
      }

      /* Header styles */
      .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        background: linear-gradient(
          135deg,
          var(--primary-color),
          var(--secondary-color)
        );
        padding: 0 10%;
        display: flex;
        align-items: center;
        justify-content: space-between;
        z-index: 1000;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        border-bottom: 2px solid #fff;
      }

      .logo {
        font-size: 28px;
        font-family: "Montserrat", sans-serif;
        font-weight: 700;
        color: var(--white);
        text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
      }

      .navigation ul {
        list-style: none;
        margin: 0;
        padding: 0;
      }

      .header .navigation ul li {
        float: left;
        position: relative;
      }

      .header .navigation ul li a {
        font-size: 16px;
        font-weight: 500;
        color: var(--white);
        text-decoration: none;
        padding: 22px 20px;
        display: block;
      }

      #toggle,
      .header label {
        display: none;
      }

      .menu {
        width: 28px;
        height: 28px;
        filter: brightness(0) invert(1);
      }

      @media (max-width: 950px) {
        .header label {
          display: initial;
        }
        .header .navigation {
          position: absolute;
          top: 100%;
          left: 0;
          right: 0;
          background: var(--primary-color);
          display: none;
        }
        .header .navigation ul li {
          width: 100%;
        }
        #toggle:checked ~ .navigation {
          display: block;
        }
        .header .navigation:hover {
          position: absolute;
          top: 100%;
          left: 0;
          right: 0;
          background: var(--secondary-color);
          display: none;
        }
      }

      /* Body styles */
      body {
        font-family: "Poppins", sans-serif;
        background-color: var(--background);
        margin: 0;
        padding: 0;
        padding-top: 80px;
        min-height: 100vh;
        color: var(--text-color);
      }

      /* Game container */
      .game-container {
        max-width: 800px;
        margin: 20px auto;
        padding: 30px;
        background-color: var(--white);
        border-radius: 15px;
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
      }

      h1 {
        text-align: center;
        color: var(--dark-pastel);
        margin-bottom: 30px;
        font-size: 28px;
        text-transform: uppercase;
        letter-spacing: 1px;
      }

      .instructions {
        text-align: center;
        margin-bottom: 30px;
        color: var(--text-color);
        font-size: 16px;
      }

      .matching-game {
        display: flex;
        flex-direction: column;
        gap: 15px;
      }

      .match-item {
        display: flex;
        align-items: center;
        gap: 15px;
        padding: 15px;
        background-color: var(--accent-color);
        border-radius: 10px;
        transition: all 0.3s ease;
      }

      .match-item:hover {
        transform: translateY(-3px);
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
      }

      .first-part {
        flex: 1;
        font-weight: 500;
        padding: 10px;
        background-color: var(--white);
        border-radius: 8px;
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
      }

      .second-part {
        flex: 1;
      }

      select {
        width: 100%;
        padding: 10px;
        border: 2px solid var(--light-pastel);
        border-radius: 8px;
        background-color: var(--white);
        font-size: 14px;
        color: var(--text-color);
        cursor: pointer;
        transition: all 0.3s ease;
      }

      select:focus {
        outline: none;
        border-color: var(--dark-pastel);
        box-shadow: 0 0 0 3px rgba(212, 93, 121, 0.2);
      }

      .buttons {
        display: flex;
        justify-content: center;
        gap: 20px;
        margin-top: 30px;
      }

      button {
        padding: 12px 25px;
        border: none;
        border-radius: 8px;
        font-size: 16px;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.3s ease;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
      }

      .check-btn {
        background-color: var(--primary-color);
        color: var(--white);
      }

      .check-btn:hover {
        background-color: var(--dark-pastel);
        transform: translateY(-2px);
      }

      .reset-btn {
        background-color: var(--accent-color);
        color: var(--text-color);
      }

      .reset-btn:hover {
        background-color: var(--light-pastel);
        transform: translateY(-2px);
      }

      .correct {
        background-color: var(--correct-color);
      }

      .incorrect {
        background-color: var(--incorrect-color);
      }

      .disabled {
        pointer-events: none;
        opacity: 0.8;
      }

      .score {
        text-align: center;
        margin-top: 20px;
        font-size: 18px;
        font-weight: 600;
        color: var(--dark-pastel);
      }

      /* Progress bar styles */
      .progress-container {
        width: 100%;
        height: 20px;
        background-color: #f1f1f1;
        border-radius: 10px;
        margin: 20px 0;
        overflow: hidden;
      }

      .progress-bar {
        height: 100%;
        background-color: var(--progress-bar);
        width: 0%;
        transition: width 0.5s ease;
        display: flex;
        align-items: center;
        justify-content: center;
        color: white;
        font-size: 12px;
        font-weight: bold;
      }

      /* Congratulations modal */
      .congrats-modal {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.7);
        z-index: 2000;
        justify-content: center;
        align-items: center;
      }

      .modal-content {
        background-color: var(--white);
        padding: 30px;
        border-radius: 15px;
        max-width: 500px;
        width: 90%;
        text-align: center;
        position: relative;
        animation: popIn 0.5s ease;
      }

      @keyframes popIn {
        0% {
          transform: scale(0.5);
          opacity: 0;
        }
        80% {
          transform: scale(1.1);
        }
        100% {
          transform: scale(1);
          opacity: 1;
        }
      }

      .modal-content h2 {
        color: var(--dark-pastel);
        margin-bottom: 15px;
        font-size: 24px;
      }

      .modal-content p {
        margin-bottom: 20px;
        font-size: 16px;
      }

      .close-modal {
        position: absolute;
        top: 10px;
        right: 15px;
        font-size: 24px;
        color: var(--text-color);
        cursor: pointer;
        transition: all 0.3s ease;
      }

      .close-modal:hover {
        color: var(--primary-color);
        transform: rotate(90deg);
      }

      .confetti {
        position: absolute;
        width: 10px;
        height: 10px;
        background-color: #f00;
        opacity: 0;
      }

      @media (max-width: 600px) {
        .game-container {
          padding: 20px;
        }

        .match-item {
          flex-direction: column;
          gap: 10px;
        }

        .first-part,
        .second-part {
          width: 100%;
        }
      }