.game-container {
        background: rgba(255, 255, 255, 0.05);
        backdrop-filter: blur(8px);
        border-radius: 20px;
        padding: 2rem;
        max-width: 900px;
        width: 95%;
        text-align: center;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
        border: 1px solid rgba(255, 255, 255, 0.15);
        position: relative;
      }

      .team-setup-screen {
        display: block;
      }

      .team-vs-display {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin: 2rem 0;
        padding: 1rem;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 15px;
        border: 2px solid rgba(255, 255, 255, 0.2);
      }

      .team-box {
        flex: 1;
        padding: 1rem;
        margin: 0 1rem;
        background: rgba(255, 255, 255, 0.05);
        border-radius: 10px;
        border: 2px solid transparent;
        transition: all 0.3s ease;
      }

      .team-box.active {
        border-color: #ffd700;
        background: rgba(255, 215, 0, 0.1);
        transform: scale(1.05);
        box-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
      }

      .team-name {
        font-size: 1.5rem;
        font-weight: bold;
        color: #ffd700;
        margin-bottom: 0.5rem;
      }

      .team-score {
        font-size: 2rem;
        font-weight: bold;
        color: white;
      }

      .vs-text {
        font-size: 2rem;
        font-weight: bold;
        color: #ff6b6b;
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
        animation: pulse 2s infinite;
      }

      .round-info {
        background: rgba(255, 255, 255, 0.15);
        border-radius: 10px;
        padding: 1rem;
        margin: 1rem 0;
        display: flex;
        justify-content: space-between;
        align-items: center;
      }

      .setup-form {
        display: grid;
        gap: 1.5rem;
        max-width: 500px;
        margin: 0 auto;
        text-align: left;
      }

      .form-group {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
      }

      .form-group label {
        font-weight: bold;
        color: #ffd700;
      }

      .form-input {
        padding: 12px;
        border: 2px solid rgba(255, 255, 255, 0.3);
        border-radius: 8px;
        background: rgba(255, 255, 255, 0.1);
        color: white;
        font-size: 1rem;
      }

      .form-input::placeholder {
        color: rgba(255, 255, 255, 0.7);
      }

      .checkbox-group {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        margin-top: 0.5rem;
      }

      .checkbox-group input[type="checkbox"] {
        width: 20px;
        height: 20px;
        accent-color: #ffd700;
      }

      .math-challenge-screen {
        display: none;
      }

      .math-problem {
        font-size: 2.5rem;
        font-weight: bold;
        color: #ffd700;
        margin: 2rem 0;
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
      }

      .number-tiles {
        display: flex;
        justify-content: center;
        gap: 0.5rem;
        margin: 1rem 0;
        flex-wrap: wrap;
      }

      .number-tile {
        background: rgba(255, 255, 255, 0.2);
        border: 2px solid rgba(255, 255, 255, 0.3);
        border-radius: 8px;
        padding: 1rem;
        font-size: 1.5rem;
        font-weight: bold;
        color: white;
        min-width: 60px;
        text-align: center;
      }

      .celebration {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        pointer-events: none;
        z-index: 1000;
      }

      .confetti {
        position: absolute;
        width: 10px;
        height: 10px;
        background: #ffd700;
        animation: confetti-fall 3s linear forwards;
      }

      @keyframes confetti-fall {
        0% {
          transform: translateY(-100vh) rotate(0deg);
          opacity: 1;
        }
        100% {
          transform: translateY(100vh) rotate(360deg);
          opacity: 0;
        }
      }

      .timer-critical {
        animation: timer-pulse 0.5s infinite;
        color: #ff4444 !important;
      }

      @keyframes timer-pulse {
        0%,
        100% {
          transform: scale(1);
        }
        50% {
          transform: scale(1.1);
        }
      }

      .skip-btn {
        background: linear-gradient(45deg, #ff9800, #f57c00);
        color: white;
        border: none;
        padding: 10px 25px;
        font-size: 1rem;
        border-radius: 25px;
        cursor: pointer;
        margin: 0 10px;
        transition: all 0.3s ease;
      }

      .skip-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 15px rgba(255, 152, 0, 0.4);
      }

      h1 {
        font-size: 2.5rem;
        margin-bottom: 1rem;
        text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.8);
        animation: pulse 2s infinite;
        color: #ffffff;
      }

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

      @keyframes pulse-glow {
        0%,
        100% {
          box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
          transform: scale(1);
        }
        50% {
          box-shadow: 0 8px 25px rgba(255, 107, 107, 0.8);
          transform: scale(1.02);
        }
      }

      .quick-start-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(76, 175, 80, 0.4);
      }

      .progress-bar {
        width: 100%;
        height: 8px;
        background: rgba(255, 255, 255, 0.2);
        border-radius: 4px;
        margin: 1rem 0;
        overflow: hidden;
      }

      .progress-fill {
        height: 100%;
        background: linear-gradient(90deg, #4caf50, #45a049);
        border-radius: 4px;
        transition: width 0.3s ease;
      }

      .sound-toggle {
        position: absolute;
        top: 20px;
        right: 20px;
        background: rgba(255, 255, 255, 0.2);
        border: none;
        color: white;
        padding: 10px;
        border-radius: 50%;
        cursor: pointer;
        font-size: 1.2rem;
        transition: all 0.3s ease;
      }

      .sound-toggle:hover {
        background: rgba(255, 255, 255, 0.3);
        transform: scale(1.1);
      }

      .hint-box {
        background: rgba(255, 215, 0, 0.1);
        border: 2px solid rgba(255, 215, 0, 0.3);
        border-radius: 10px;
        padding: 1rem;
        margin: 1rem 0;
        animation: hint-pulse 3s infinite;
      }

      @keyframes hint-pulse {
        0%,
        100% {
          border-color: rgba(255, 215, 0, 0.3);
        }
        50% {
          border-color: rgba(255, 215, 0, 0.6);
        }
      }

      .word-suggestion {
        display: inline-block;
        background: rgba(135, 206, 235, 0.2);
        color: #87ceeb;
        padding: 5px 10px;
        margin: 3px;
        border-radius: 15px;
        font-size: 0.9rem;
        border: 1px solid rgba(135, 206, 235, 0.3);
      }

      kbd {
        background-color: rgba(255, 255, 255, 0.2);
        border: 1px solid rgba(255, 255, 255, 0.4);
        border-radius: 4px;
        padding: 2px 6px;
        font-size: 0.8rem;
        font-family: monospace;
        color: #ffd700;
      }

      .letter-tile {
        display: inline-block;
        background: linear-gradient(
          145deg,
          rgba(255, 255, 255, 0.2),
          rgba(255, 255, 255, 0.1)
        );
        border: 2px solid rgba(255, 215, 0, 0.3);
        border-radius: 10px;
        padding: 15px;
        margin: 5px;
        font-size: 2rem;
        font-weight: bold;
        color: #ffd700;
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
        transition: all 0.3s ease;
        cursor: pointer;
      }

      .letter-tile:hover {
        transform: scale(1.1);
        border-color: #ffd700;
        box-shadow: 0 5px 15px rgba(255, 215, 0, 0.3);
      }

      .feedback-message {
        position: fixed;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        background: rgba(0, 0, 0, 0.9);
        color: white;
        padding: 20px 40px;
        border-radius: 15px;
        font-size: 1.2rem;
        z-index: 1001;
        animation: fade-in-out 2s ease;
      }

      @keyframes fade-in-out {
        0%,
        100% {
          opacity: 0;
          transform: translate(-50%, -50%) scale(0.8);
        }
        20%,
        80% {
          opacity: 1;
          transform: translate(-50%, -50%) scale(1);
        }
      }

      .letter-selection-screen {
        display: none;
      }

      .choice-buttons {
        display: flex;
        justify-content: center;
        gap: 2rem;
        margin: 2rem 0;
      }

      .vowel-btn,
      .consonant-btn {
        padding: 20px 40px;
        font-size: 1.5rem;
        font-weight: bold;
        border: none;
        border-radius: 15px;
        cursor: pointer;
        transition: all 0.3s ease;
        text-transform: uppercase;
      }

      .vowel-btn {
        background: linear-gradient(45deg, #e74c3c, #c0392b);
        color: white;
      }

      .consonant-btn {
        background: linear-gradient(45deg, #3498db, #2980b9);
        color: white;
      }

      .vowel-btn:hover,
      .consonant-btn:hover {
        transform: translateY(-3px);
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
      }

      .vowel-btn:disabled,
      .consonant-btn:disabled {
        opacity: 0.5;
        cursor: not-allowed;
        transform: none;
      }

      .letter-selection-display {
        background: rgba(255, 255, 255, 0.15);
        border-radius: 15px;
        padding: 2rem;
        margin: 2rem 0;
      }

      .selected-letters {
        display: flex;
        justify-content: center;
        gap: 10px;
        margin: 1rem 0;
        flex-wrap: wrap;
      }

      .selected-letter {
        background: linear-gradient(
          145deg,
          rgba(255, 255, 255, 0.3),
          rgba(255, 255, 255, 0.1)
        );
        border: 3px solid #ffd700;
        border-radius: 10px;
        padding: 15px;
        font-size: 2rem;
        font-weight: bold;
        color: #ffd700;
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
        min-width: 60px;
        text-align: center;
        animation: letter-appear 0.5s ease;
      }

      @keyframes letter-appear {
        0% {
          transform: scale(0) rotate(180deg);
          opacity: 0;
        }
        100% {
          transform: scale(1) rotate(0deg);
          opacity: 1;
        }
      }

      .countdown-info {
        text-align: center;
        margin: 2rem 0;
      }

      .current-player {
        font-size: 1.8rem;
        color: #ffd700;
        font-weight: bold;
        margin-bottom: 1rem;
      }

      .letters-remaining {
        font-size: 1.2rem;
        color: #87ceeb;
        margin-bottom: 1rem;
      }

      .individual-play-screen {
        display: none;
      }

      .player-turn-indicator {
        background: rgba(255, 215, 0, 0.2);
        border: 2px solid #ffd700;
        border-radius: 15px;
        padding: 1rem;
        margin: 1rem 0;
        text-align: center;
      }

      .word-input-section {
        background: rgba(255, 255, 255, 0.1);
        border-radius: 15px;
        padding: 2rem;
        margin: 2rem 0;
      }

      .word-submit-area {
        display: flex;
        justify-content: center;
        align-items: center;
        gap: 1rem;
        margin: 1rem 0;
      }

      .countdown-word-input {
        padding: 15px 20px;
        font-size: 1.4rem;
        border: 3px solid rgba(255, 215, 0, 0.5);
        border-radius: 10px;
        background: rgba(255, 255, 255, 0.1);
        color: white;
        text-align: center;
        min-width: 300px;
        text-transform: uppercase;
        font-weight: bold;
      }

      .countdown-word-input:focus {
        border-color: #ffd700;
        outline: none;
        box-shadow: 0 0 15px rgba(255, 215, 0, 0.3);
      }

      .reveal-screen {
        display: none;
      }

      .word-reveal {
        background: rgba(255, 255, 255, 0.15);
        border-radius: 15px;
        padding: 2rem;
        margin: 2rem 0;
      }

      .player-word {
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        padding: 1.5rem;
        margin: 1rem 0;
        border-left: 5px solid #ffd700;
      }

      .word-display {
        font-size: 2rem;
        font-weight: bold;
        color: #ffd700;
        margin-bottom: 0.5rem;
      }

      .word-points {
        font-size: 1.2rem;
        color: #87ceeb;
      }

      .invalid-word {
        border-left-color: #e74c3c;
      }

      .invalid-word .word-display {
        color: #e74c3c;
      }

      .instructions {
        background: rgba(255, 255, 255, 0.08);
        border-radius: 15px;
        padding: 2rem;
        margin: 2rem 0;
        text-align: left;
        line-height: 1.8;
        border: 1px solid rgba(255, 255, 255, 0.2);
        backdrop-filter: blur(5px);
      }

      .instructions h2 {
        color: #ffd700;
        text-align: center;
        margin-bottom: 1.5rem;
        font-size: 1.8rem;
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
      }

      .instructions h3 {
        color: #87ceeb;
        margin: 1.5rem 0 0.8rem 0;
        font-size: 1.3rem;
      }

      .instructions ul {
        margin-left: 1.5rem;
        margin-bottom: 1rem;
      }

      .instructions li {
        margin-bottom: 0.5rem;
      }

      .example-box {
        background: rgba(255, 215, 0, 0.2);
        border-left: 4px solid #ffd700;
        padding: 1rem;
        margin: 1rem 0;
        border-radius: 5px;
      }

      .difficulty-levels {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 1rem;
        margin: 1.5rem 0;
      }

      .difficulty-card {
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        padding: 1rem;
        border: 2px solid transparent;
        transition: all 0.3s ease;
      }

      .difficulty-card:hover {
        border-color: #ffd700;
        transform: translateY(-5px);
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
      }

      .difficulty-card h4 {
        color: #ffd700;
        margin-bottom: 0.5rem;
      }

      .start-btn {
        background: linear-gradient(45deg, #ff6b6b, #ff8e53);
        color: white;
        border: none;
        padding: 15px 40px;
        font-size: 1.2rem;
        border-radius: 50px;
        cursor: pointer;
        transition: all 0.3s ease;
        margin-top: 2rem;
        box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
      }

      .start-btn:hover {
        transform: translateY(-3px);
        box-shadow: 0 6px 20px rgba(255, 107, 107, 0.6);
      }

      .start-btn:active {
        transform: translateY(0);
      }

      .tips {
        background: rgba(135, 206, 235, 0.2);
        border-left: 4px solid #87ceeb;
        padding: 1rem;
        margin: 1rem 0;
        border-radius: 5px;
      }

      .highlight {
        color: #ffd700;
        font-weight: bold;
      }

      .game-screen {
        display: none;
      }

      .letters-display {
        font-size: 3rem;
        font-weight: bold;
        color: #ffd700;
        margin: 2rem 0;
        letter-spacing: 0.5rem;
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
      }

      .timer {
        font-size: 4rem;
        color: #ff6b6b;
        margin: 1rem 0;
        font-weight: bold;
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
      }

      .word-input {
        padding: 15px;
        font-size: 1.2rem;
        border: 2px solid rgba(255, 255, 255, 0.3);
        border-radius: 10px;
        background: rgba(255, 255, 255, 0.1);
        color: white;
        text-align: center;
        width: 300px;
        margin: 1rem;
      }

      .word-input::placeholder {
        color: rgba(255, 255, 255, 0.7);
      }

      .submit-btn,
      .back-btn {
        background: linear-gradient(45deg, #4caf50, #45a049);
        color: white;
        border: none;
        padding: 10px 25px;
        font-size: 1rem;
        border-radius: 25px;
        cursor: pointer;
        margin: 0 10px;
        transition: all 0.3s ease;
      }

      .back-btn {
        background: linear-gradient(45deg, #757575, #616161);
      }

      .submit-btn:hover,
      .back-btn:hover {
        transform: translateY(-2px);
      }

      .word-list {
        max-height: 200px;
        overflow-y: auto;
        margin: 1rem 0;
        text-align: left;
      }

      .word-item {
        background: rgba(255, 255, 255, 0.1);
        padding: 5px 10px;
        margin: 5px 0;
        border-radius: 5px;
        border-left: 3px solid #4caf50;
      }

      .score {
        font-size: 1.5rem;
        margin: 1rem 0;
        color: #ffd700;
      }

      /* Accessibility Styles */
      .sr-only {
        position: absolute;
        width: 1px;
        height: 1px;
        padding: 0;
        margin: -1px;
        overflow: hidden;
        clip: rect(0, 0, 0, 0);
        white-space: nowrap;
        border-width: 0;
      }

      /* Focus visible styles for keyboard navigation */
      button:focus-visible,
      input:focus-visible,
      select:focus-visible,
      .letter-tile:focus-visible {
        outline: 3px solid #4caf50;
        outline-offset: 3px;
        box-shadow: 0 0 0 6px rgba(76, 175, 80, 0.3);
      }

      /* Reduced motion support */
      @media (prefers-reduced-motion: reduce) {
        *,
        *::before,
        *::after {
          animation-duration: 0.01ms !important;
          animation-iteration-count: 1 !important;
          transition-duration: 0.01ms !important;
        }
      }