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

      :root {
        --primary-color: #5b6abf;
        --secondary-color: #9c64a6;
        --accent-color: #6a5acd;
        --light-color: #e6e6fa;
        --success-color: #4caf50;
        --error-color: #f44336;
        --text-color: #2c3e50;
        --white: #ffffff;
      }

      /* Estilos del Header mejorado */
      .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);
        transition: all 0.3s ease;
      }

      .header:hover {
        box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
      }

      .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);
        letter-spacing: 1px;
      }

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

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

      .header .navigation ul li a {
        font-family: "Poppins", sans-serif;
        font-size: 16px;
        font-weight: 500;
        color: var(--white);
        text-decoration: none;
        padding: 22px 20px;
        display: block;
        transition: all 0.3s ease;
      }

      .header .navigation ul li a:hover {
        background-color: rgba(255, 255, 255, 0.15);
        transform: translateY(-2px);
      }

      .header .navigation ul li ul {
        position: absolute;
        right: 0;
        width: 220px;
        background: rgba(255, 255, 255, 0.95);
        border-radius: 0 0 8px 8px;
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
        display: none;
        overflow: hidden;
      }

      .header .navigation ul li ul li a {
        color: var(--text-color);
        padding: 12px 20px;
        font-size: 14px;
      }

      .header .navigation ul li ul li a:hover {
        background-color: var(--light-color);
        color: var(--primary-color);
      }

      .header .navigation ul li:hover > ul {
        display: initial;
        animation: fadeIn 0.3s ease-out;
      }

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

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

      @media (max-width: 950px) {
        .header label {
          display: initial;
        }

        .header {
          padding: 15px 10%;
        }

        .header .navigation {
          position: absolute;
          top: 100%;
          left: 0;
          right: 0;
          background: var(--primary-color);
          display: none;
          border-radius: 0 0 12px 12px;
        }

        .header .navigation ul li {
          width: 100%;
        }

        .header .navigation ul li a {
          padding: 12px 20px;
        }

        .header .navigation ul li ul {
          position: relative;
          width: 100%;
          left: 0;
          background: rgba(255, 255, 255, 0.1);
        }

        .header .navigation ul li ul li a {
          padding-left: 30px;
        }

        #toggle:checked ~ .navigation {
          display: block;
          animation: slideDown 0.4s ease-out;
        }
      }

      /* Estilos del cuerpo y fondo */
      body {
        font-family: "Poppins", sans-serif;
        background: linear-gradient(135deg, #e0f7fa, #d1c4e9, #b3e5fc);
        margin: 0;
        padding: 0;
        padding-top: 80px;
        min-height: 100vh;
        color: var(--text-color);
        background-size: 400% 400%;
        animation: gradientBG 15s ease infinite;
      }

      /* Animación de fondo */
      @keyframes gradientBG {
        0% {
          background-position: 0% 50%;
        }
        50% {
          background-position: 100% 50%;
        }
        100% {
          background-position: 0% 50%;
        }
      }

      /* Animaciones */
      @keyframes fadeIn {
        from {
          opacity: 0;
          transform: translateY(-10px);
        }
        to {
          opacity: 1;
          transform: translateY(0);
        }
      }

      @keyframes slideDown {
        from {
          opacity: 0;
          transform: translateY(-20px);
        }
        to {
          opacity: 1;
          transform: translateY(0);
        }
      }

      @keyframes pulse {
        0% {
          transform: scale(1);
        }
        50% {
          transform: scale(1.05);
        }
        100% {
          transform: scale(1);
        }
      }

      @keyframes bounce {
        0%,
        20%,
        50%,
        80%,
        100% {
          transform: translateY(0);
        }
        40% {
          transform: translateY(-15px);
        }
        60% {
          transform: translateY(-7px);
        }
      }

      /* Header styles */
      .header-menu {
        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;
        transition: all 0.3s ease;
      }

      .header-menu:hover {
        box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
      }

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

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

      .header-menu .navigation ul li {
        position: relative;
      }

      .header-menu .navigation ul li a {
        font-family: "Poppins", sans-serif;
        font-size: 16px;
        font-weight: 500;
        color: var(--white);
        text-decoration: none;
        padding: 22px 20px;
        display: block;
        transition: all 0.3s ease;
      }

      .header-menu .navigation ul li a:hover {
        background-color: rgba(255, 255, 255, 0.733);
        transform: translateY(-2px);
        color: var(--primary-color);
      }

      #toggle,
      .header-menu label {
        display: none;
        cursor: pointer;
      }

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

      @media (max-width: 950px) {
        .header-menu label {
          display: initial;
        }

        .header-menu {
          padding: 15px 10%;
        }

        .header-menu .navigation {
          position: absolute;
          top: 100%;
          left: 0;
          right: 0;
          background: var(--primary-color);
          display: none;
          border-radius: 0 0 12px 12px;
        }

        .header-menu .navigation ul {
          flex-direction: column;
        }

        .header-menu .navigation ul li {
          width: 100%;
        }

        .header-menu .navigation ul li a {
          padding: 12px 20px;
        }

        #toggle:checked ~ .navigation {
          display: block;
          animation: slideDown 0.4s ease-out;
        }
      }

      /* Body styles */
      body {
        font-family: "Poppins", sans-serif;
        background: linear-gradient(
          135deg,
          hsl(215, 100%, 86%),
          #3b97ff,
          #5c9bee
        );
        margin: 0;
        padding: 0;
        padding-top: 80px;
        min-height: 100vh;
        color: var(--text-color);
        background-size: 400% 400%;
        animation: gradientBG 15s ease infinite;
      }

      @keyframes gradientBG {
        0% {
          background-position: 0% 50%;
        }
        50% {
          background-position: 100% 50%;
        }
        100% {
          background-position: 0% 50%;
        }
      }

      @keyframes slideDown {
        from {
          opacity: 0;
          transform: translateY(-20px);
        }
        to {
          opacity: 1;
          transform: translateY(0);
        }
      }

      /* Game styles */
      .game-container {
        max-width: 1000px;
        margin: 0 auto;
        padding: 20px;
      }

      .container {
        background-color: rgba(255, 255, 255, 0.9);
        padding: 30px;
        border-radius: 15px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        margin-bottom: 30px;
        border: 3px solid var(--primary-color);
      }

      h1 {
        font-family: "Poppins", sans-serif;
        color: var(--primary-color);
        text-align: center;
        margin-bottom: 20px;
        font-size: 2.5rem;
        text-transform: uppercase;
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
        background-color: var(--white);
        padding: 15px;
        border-radius: 10px;
        display: inline-block;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
      }

      .instructions {
        text-align: center;
        margin-bottom: 20px;
        font-size: 1.1rem;
        color: var(--text-color);
        background-color: var(--white);
        padding: 15px;
        border-radius: 10px;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
      }

      #crossword {
        display: grid;
        grid-template-columns: repeat(15, 35px);
        grid-template-rows: repeat(15, 35px);
        gap: 2px;
        margin: 20px auto;
        justify-content: center;
        background-color: var(--white);
        padding: 20px;
        border-radius: 10px;
        box-shadow: var(--shadow);
        border: 2px solid var(--primary-color);
      }

      .cell-container {
        width: 35px;
        height: 35px;
        position: relative;
      }

      .cell {
        width: 100%;
        height: 100%;
        text-align: center;
        font-size: 18px;
        font-weight: bold;
        border: 1px solid var(--primary-color);
        background-color: var(--white);
        box-sizing: border-box;
        position: relative;
        text-transform: uppercase;
        border-radius: 5px;
        transition: all 0.2s ease;
      }

      .cell:focus {
        outline: none;
        background-color: #e6f7ff;
        border: 2px solid var(--secondary-color);
        transform: scale(1.05);
      }

      .clue-number {
        position: absolute;
        top: 1px;
        left: 2px;
        font-size: 9px;
        color: var(--primary-color);
        font-weight: bold;
      }

      .cell.highlight {
        background-color: #e3f2fd;
      }

      .cell.disabled {
        background-color: #f5f5f5;
        border: 1px solid #ddd;
      }

      #clues {
        display: flex;
        justify-content: space-around;
        margin-top: 20px;
        flex-wrap: wrap;
        background-color: var(--white);
        padding: 20px;
        border-radius: 10px;
        box-shadow: var(--shadow);
        border: 2px solid var(--primary-color);
      }

      .clues-column {
        width: 45%;
        min-width: 300px;
        text-align: left;
        padding: 10px;
        margin-bottom: 10px;
      }

      .clues-column h2 {
        color: var(--primary-color);
        border-bottom: 2px solid var(--light-color);
        padding-bottom: 10px;
        margin-bottom: 15px;
        font-size: 1.3rem;
      }

      .clue-item {
          display: flex;
          align-items: center;
          margin: 10px 0;
          padding-left: 10px;
          border-left: 3px solid var(--secondary-color);
      }

      .clue-image {
          width: 40px;
          height: 40px;
          object-fit: cover;
          margin-right: 10px;
          border-radius: 5px;
          border: 2px solid var(--light-color);
      }

      .clue-text {
          font-size: 16px;
          color: var(--text-color);
      }

      .button-container {
        display: flex;
        justify-content: center;
        gap: 20px;
        margin: 30px 0;
      }

      button {
        padding: 12px 25px;
        background: linear-gradient(
          135deg,
          var(--primary-color),
          var(--secondary-color)
        );
        color: white;
        border: none;
        cursor: pointer;
        border-radius: 30px;
        font-size: 1rem;
        font-weight: 600;
        transition: all 0.3s ease;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
      }

      button:hover {
        transform: translateY(-3px);
        box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
      }

      button:active {
        transform: translateY(1px);
      }

      #check-answers {
        background: linear-gradient(135deg, var(--success-color), #44b984);
      }

      #reset-crossword {
        background: linear-gradient(135deg, #ff5252, #ff7675);
      }

      #result {
        margin-top: 15px;
        font-size: 18px;
        color: var(--white);
        background-color: var(--primary-color);
        padding: 15px;
        border-radius: 10px;
        display: inline-block;
        box-shadow: var(--shadow);
        text-align: center;
        width: 100%;
        font-weight: 600;
      }

      /* Progress bar styles */
      .progress-container {
        background-color: var(--white);
        border-radius: 10px;
        padding: 20px;
        margin-top: 20px;
        box-shadow: var(--shadow);
        border: 2px solid var(--primary-color);
      }

      .progress-container h3 {
        color: var(--primary-color);
        margin-top: 0;
        margin-bottom: 15px;
        font-size: 1.2rem;
        text-align: center;
      }

      .progress-bar {
        width: 100%;
        height: 25px;
        background-color: #f0f0f0;
        border-radius: 12px;
        overflow: hidden;
        position: relative;
        box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
      }

      .progress-fill {
        height: 100%;
        background: linear-gradient(
          90deg,
          var(--secondary-color),
          var(--primary-color)
        );
        border-radius: 12px;
        transition: width 0.5s ease;
        display: flex;
        align-items: center;
        justify-content: center;
        color: white;
        font-weight: bold;
        font-size: 14px;
        text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
      }

      /* Celebration styles */
      .congratulations-container {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.8);
        display: flex;
        justify-content: center;
        align-items: center;
        z-index: 2000;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.5s ease;
      }

      .congratulations-box {
        background: linear-gradient(
          135deg,
          var(--primary-color),
          var(--secondary-color)
        );
        padding: 40px;
        border-radius: 15px;
        text-align: center;
        max-width: 500px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        transform: scale(0.8);
        transition: transform 0.5s ease;
      }

      .congratulations-box h2 {
        color: var(--white);
        font-size: 2rem;
        margin-bottom: 20px;
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
      }

      .congratulations-box p {
        color: var(--white);
        font-size: 1.2rem;
        margin-bottom: 30px;
      }

      .congratulations-box button {
        background-color: var(--white);
        color: var(--primary-color);
        border: none;
        padding: 12px 30px;
        font-size: 1rem;
        font-weight: 600;
        border-radius: 30px;
        cursor: pointer;
        transition: all 0.3s ease;
      }

      .congratulations-box button:hover {
        transform: scale(1.05);
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
      }

      .show-congratulations {
        opacity: 1;
        pointer-events: auto;
      }

      .show-congratulations .congratulations-box {
        transform: scale(1);
      }

      /* Confetti animation */
      @keyframes fall {
        to {
          transform: translateY(100vh) rotate(360deg);
        }
      }

      .confetti {
        position: fixed;
        top: -10px;
        width: 10px;
        height: 10px;
        background-color: #f00;
        border-radius: 50%;
        animation: fall 3s linear forwards;
        z-index: 1000;
        pointer-events: none;
      }

      @media (max-width: 768px) {
        #crossword {
          grid-template-columns: repeat(15, 25px);
          grid-template-rows: repeat(15, 25px);
          padding: 10px;
        }

        .cell-container {
          width: 25px;
          height: 25px;
        }

        .cell {
          font-size: 14px;
        }

        .clue-number {
          font-size: 7px;
        }

        .clues-column {
          width: 100%;
          margin: 10px 0;
        }

        h1 {
          font-size: 1.8em;
          padding: 10px;
        }

        .container {
          padding: 15px;
        }

        .progress-bar {
          height: 20px;
        }

        .clue-image {
          width: 30px;
          height: 30px;
        }
        
        .clue-text {
          font-size: 14px;
        }
      }