/* ===== MISMO CSS ORIGINAL (CON PEQUEÑAS ADAPTACIONES) ===== */
      :root {
        --primary-color: rgba(1, 1, 1, 0.9);
        --secondary-color: #ff8c42;
        --accent-color: #ff6600;
        --light-color: #ffd8b5;
        --text-color: #333;
        --white: #ffffff;
        --black: #000000;
        --orange-gradient: linear-gradient(
          115deg,
          #ff6701,
          #ff9900,
          #fd640b,
          #ff8851,
          #ff9810,
          #ff7951
        );
        --success-color: #4caf50;
        --error-color: #f44336;
        --orange-bg: #b9b8b7;
        --zero-color: #3498db;
        --first-color: #9b59b6;
      }

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

      body {
        min-height: 100vh;
        background-color: var(--orange-bg);
        color: var(--text-color);
        padding-top: 80px;
      }

      /* HEADER (idéntico) */
      .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        background-color: rgba(1, 1, 1, 0.9);
        padding: 0 10%;
        display: flex;
        align-items: center;
        justify-content: space-between;
        z-index: 1000;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
        border-bottom: 2px solid var(--secondary-color);
        transition: all 0.3s ease;
      }

      .header:hover {
        box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
      }

      .logo {
        font-size: 28px;
        font-weight: 700;
        color: var(--white);
        text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
        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-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: var(--secondary-color);
        transform: translateY(-2px);
        color: var(--black);
      }

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

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

      /* MAIN CONTAINER */
      .main-container {
        max-width: 1000px;
        margin: 0 auto;
        padding: 20px;
      }

      h1 {
        text-align: center;
        color: var(--black);
        margin-bottom: 30px;
        font-size: 2.5rem;
        font-weight: 700;
        text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.1);
        position: relative;
        padding-bottom: 15px;
      }

      h1::after {
        content: "";
        position: absolute;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 120px;
        height: 4px;
        background: var(--orange-gradient);
        border-radius: 4px;
      }

      /* GAME HEADER */
      .game-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        background-color: var(--white);
        border-radius: 15px;
        padding: 20px 30px;
        margin-bottom: 30px;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        flex-wrap: wrap;
        gap: 20px;
      }

      .game-stats {
        display: flex;
        gap: 20px;
      }

      .stat-box {
        background: linear-gradient(
          135deg,
          var(--secondary-color),
          var(--accent-color)
        );
        color: white;
        padding: 15px 25px;
        border-radius: 10px;
        text-align: center;
        min-width: 140px;
        box-shadow: 0 4px 10px rgba(255, 140, 66, 0.3);
      }

      .stat-value {
        font-size: 2rem;
        font-weight: 700;
        margin-bottom: 5px;
      }

      .stat-label {
        font-size: 0.9rem;
        opacity: 0.9;
      }

      /* Botón reinicio (mismo estilo que next, pero naranja) */
      .reset-btn {
        padding: 12px 30px;
        background: var(--orange-gradient);
        color: white;
        border: none;
        border-radius: 60px;
        font-size: 1.2rem;
        font-weight: 700;
        cursor: pointer;
        transition: 0.2s;
        box-shadow:
          0 8px 0 #b3470c,
          0 5px 15px rgba(255, 140, 66, 0.5);
        display: inline-flex;
        align-items: center;
        gap: 8px;
      }

      .reset-btn:hover {
        transform: translateY(-4px);
        box-shadow:
          0 12px 0 #b3470c,
          0 8px 20px rgba(255, 140, 66, 0.7);
      }

      .reset-btn:active {
        transform: translateY(4px);
        box-shadow:
          0 4px 0 #b3470c,
          0 8px 15px rgba(255, 140, 66, 0.7);
      }

      /* GAME AREA */
      .game-area {
        background-color: var(--white);
        border-radius: 20px;
        padding: 30px;
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        border-left: 6px solid var(--accent-color);
        display: flex;
        flex-direction: column;
      }

      /* Sentence display */
      .sentence-container {
        text-align: center;
        margin-bottom: 30px;
        background: linear-gradient(145deg, #fff8f0, #fff);
        padding: 30px;
        border-radius: 20px;
        box-shadow:
          inset 0 0 0 1px rgba(255, 140, 66, 0.2),
          0 8px 0 rgba(0, 0, 0, 0.05);
      }

      .sentence-label {
        font-size: 1.1rem;
        color: #666;
        margin-bottom: 10px;
        letter-spacing: 2px;
      }

      .sentence-text {
        font-size: 2rem;
        font-weight: 700;
        color: var(--primary-color);
        text-shadow: 2px 2px 0 rgba(255, 140, 66, 0.2);
        margin-bottom: 10px;
        min-height: 90px;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 0 10px;
        line-height: 1.4;
      }

      .blank-highlight {
        display: inline-block;
        background: rgba(255, 140, 66, 0.2);
        padding: 0 10px;
        border-radius: 12px;
        border: 2px dashed var(--accent-color);
        font-weight: 800;
        color: var(--accent-color);
      }

      /* Botones modales (4 columnas) */
      .modal-buttons {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 15px;
        margin-bottom: 30px;
      }

      .modal-choice {
        padding: 20px 5px;
        border: none;
        border-radius: 20px;
        font-size: 1.8rem;
        font-weight: 800;
        cursor: pointer;
        transition: all 0.25s cubic-bezier(0.2, 0.9, 0.4, 1);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 8px;
        letter-spacing: 1.5px;
        box-shadow:
          0 10px 0 rgba(0, 0, 0, 0.1),
          0 6px 20px rgba(0, 0, 0, 0.2);
        color: white;
        text-transform: uppercase;
      }

      .modal-choice i {
        font-size: 2rem;
        filter: drop-shadow(0 4px 2px rgba(0, 0, 0, 0.2));
      }

      .modal-choice:disabled {
        opacity: 0.6;
        transform: translateY(4px);
        box-shadow:
          0 6px 0 rgba(0, 0, 0, 0.1),
          0 8px 15px rgba(0, 0, 0, 0.2);
        cursor: not-allowed;
      }

      .modal-choice:not(:disabled):hover {
        transform: translateY(-6px);
        filter: brightness(1.1);
      }

      /* Colores específicos para cada modal */
      .can-btn {
        background: linear-gradient(145deg, #3498db, #1f6390);
        border-bottom: 6px solid #0d3a55;
        text-shadow: 0 2px 0 #0d3a55;
        box-shadow:
          0 12px 0 #0d3a55,
          0 8px 20px #3498db80;
      }
      .could-btn {
        background: linear-gradient(145deg, #9b59b6, #6b3b7c);
        border-bottom: 6px solid #3e1f4a;
        text-shadow: 0 2px 0 #3e1f4a;
        box-shadow:
          0 12px 0 #3e1f4a,
          0 8px 20px #9b59b680;
      }
      .may-btn {
        background: linear-gradient(145deg, #2ecc71, #1e8b4c);
        border-bottom: 6px solid #0f5c2f;
        text-shadow: 0 2px 0 #0f5c2f;
        box-shadow:
          0 12px 0 #0f5c2f,
          0 8px 20px #2ecc7180;
      }
      .might-btn {
        background: linear-gradient(145deg, #e67e22, #b85e0a);
        border-bottom: 6px solid #7f3f07;
        text-shadow: 0 2px 0 #7f3f07;
        box-shadow:
          0 12px 0 #7f3f07,
          0 8px 20px #e67e2280;
      }

      /* Result container */
      .result-container {
        margin-top: 20px;
        padding: 18px;
        border-radius: 60px;
        text-align: center;
        font-weight: 700;
        font-size: 1.2rem;
        display: none;
        animation: fadeIn 0.4s ease;
      }

      .result-container.correct {
        background: linear-gradient(145deg, #d4edda, #c3e6cb);
        color: #155724;
        border: 2px solid var(--success-color);
        display: block;
      }

      .result-container.incorrect {
        background: linear-gradient(145deg, #f8d7da, #f5c6cb);
        color: #721c24;
        border: 2px solid var(--error-color);
        display: block;
      }

      /* Next button */
      .next-btn-container {
        text-align: center;
        margin-top: 15px;
      }

      .next-btn {
        padding: 16px 50px;
        background: var(--orange-gradient);
        color: white;
        border: none;
        border-radius: 60px;
        font-size: 1.3rem;
        font-weight: 700;
        cursor: pointer;
        transition: 0.2s;
        box-shadow:
          0 12px 0 #b3470c,
          0 10px 25px rgba(255, 140, 66, 0.5);
        display: none;
        align-items: center;
        gap: 10px;
        margin: 0 auto;
      }

      .next-btn:hover {
        transform: translateY(-5px);
        box-shadow:
          0 17px 0 #b3470c,
          0 15px 30px rgba(255, 140, 66, 0.7);
      }

      .next-btn:active {
        transform: translateY(7px);
        box-shadow:
          0 5px 0 #b3470c,
          0 15px 30px rgba(255, 140, 66, 0.7);
      }

      /* Progress bar */
      .progress-container {
        width: 100%;
        height: 14px;
        background-color: #e0e0e0;
        border-radius: 10px;
        margin: 20px 0 10px;
        overflow: hidden;
        box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.1);
      }

      .progress-bar {
        height: 100%;
        background: var(--orange-gradient);
        border-radius: 10px;
        transition: width 0.5s cubic-bezier(0.22, 1, 0.36, 1);
      }

      /* Game rules (adaptadas) */
      .game-rules {
        background-color: var(--white);
        border-radius: 20px;
        padding: 30px;
        margin-top: 30px;
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        border-left: 6px solid var(--secondary-color);
      }

      .rules-title {
        font-size: 1.7rem;
        color: var(--primary-color);
        margin-bottom: 20px;
        display: flex;
        align-items: center;
        gap: 12px;
      }

      .rules-title i {
        color: var(--accent-color);
      }

      .rules-list {
        list-style-type: none;
        margin-left: 5px;
      }

      .rules-list li {
        margin-bottom: 15px;
        padding-left: 25px;
        position: relative;
        line-height: 1.6;
        font-size: 1.1rem;
      }

      .rules-list li:before {
        content: "📘";
        color: var(--accent-color);
        position: absolute;
        left: -5px;
      }

      /* Modal final (reutilizado) */
      .game-over-modal {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: rgba(0, 0, 0, 0.85);
        z-index: 2000;
        justify-content: center;
        align-items: center;
        animation: fadeIn 0.4s ease-out;
      }

      .modal-content {
        background: linear-gradient(145deg, var(--white), var(--light-color));
        padding: 40px;
        border-radius: 30px;
        text-align: center;
        max-width: 500px;
        width: 90%;
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
        transform: scale(0.9);
        animation: scaleUp 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
        border: 3px solid var(--secondary-color);
      }

      .modal-title {
        font-size: 2.5rem;
        color: var(--primary-color);
        margin-bottom: 20px;
      }

      .modal-message {
        font-size: 1.3rem;
        margin-bottom: 25px;
        color: var(--text-color);
      }

      .final-score {
        font-size: 3.5rem;
        color: var(--secondary-color);
        font-weight: 800;
        margin: 20px 0;
        text-shadow: 3px 3px 0 rgba(0, 0, 0, 0.1);
      }

      .modal-btn {
        padding: 14px 35px;
        background: linear-gradient(145deg, #2c3e50, #1a2632);
        color: white;
        border: none;
        border-radius: 60px;
        cursor: pointer;
        font-size: 1.1rem;
        font-weight: 600;
        transition: 0.2s;
        box-shadow: 0 8px 0 #0f1217;
        margin: 0 10px;
      }

      .modal-btn:hover {
        transform: translateY(-4px);
        box-shadow: 0 12px 0 #0f1217;
      }

      @keyframes fadeIn {
        from {
          opacity: 0;
        }
        to {
          opacity: 1;
        }
      }
      @keyframes scaleUp {
        to {
          transform: scale(1);
        }
      }

      /* MEDIA QUERIES */
      @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%;
        }
        #toggle:checked ~ .navigation {
          display: block;
        }
        h1 {
          font-size: 2rem;
        }
        .game-header {
          flex-direction: column;
          align-items: flex-start;
        }
        .game-stats {
          width: 100%;
          justify-content: space-between;
        }
        .modal-buttons {
          grid-template-columns: repeat(2, 1fr);
        }
      }

      @media (max-width: 768px) {
        .sentence-text {
          font-size: 1.6rem;
        }
        .modal-choice {
          font-size: 1.5rem;
          padding: 15px 5px;
        }
      }