/* Header - Compact for better space usage */
      .game-header {
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        padding: 0.75rem 0;
        box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
        position: sticky;
        top: 0;
        z-index: 1000;
      }

      .header-content {
        max-width: 1400px;
        margin: 0 auto;
        padding: 0 1rem;
        display: flex;
        justify-content: space-between;
        align-items: center;
      }

      .game-title {
        font-family: "Poppins", sans-serif;
        font-size: 1.5rem;
        font-weight: 700;
        background: linear-gradient(135deg, #ff6b6b, #4ecdc4, #45b7d1);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
      }

      .game-controls {
        display: flex;
        gap: 0.5rem;
        align-items: center;
      }




      /* Game Container - Better space utilization */
      .game-container {
        flex: 1;
        max-width: 1400px;
        margin: 0 auto;
        padding: 1rem;
        display: flex;
        flex-direction: column;
        gap: 1rem;
        height: calc(100vh - 80px);
      }

      /* Game Status - More compact */
      .game-status {
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        border-radius: 15px;
        padding: 1rem;
        display: flex;
        justify-content: space-between;
        align-items: center;
        box-shadow: var(--card-shadow);
      }

      .status-item {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        font-weight: 600;
        font-size: 0.9rem;
      }

      .status-icon {
        width: 35px;
        height: 35px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1rem;
        color: white;
      }

      .player-icon {
        background: var(--success-color);
      }

      .computer-icon {
        background: var(--error-color);
      }

      .turn-indicator {
        background: var(--warning-color);
        padding: 0.4rem 0.8rem;
        border-radius: 20px;
        color: white;
        font-weight: 600;
        font-size: 0.9rem;
        animation: pulse 2s infinite;
      }

      .thinking-indicator {
        background: var(--primary-color);
        animation: thinking 1s infinite ease-in-out;
      }

      @keyframes thinking {
        0%,
        100% {
          opacity: 1;
        }
        50% {
          opacity: 0.6;
        }
      }

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

      /* Game Board - Optimized layout */
      .game-board {
        flex: 1;
        display: grid;
        grid-template-areas:
          "computer computer computer"
          "deck current actions"
          "player player player";
        grid-template-columns: 1fr 2fr 1fr;
        grid-template-rows: 1fr auto 1fr;
        gap: 1rem;
        align-items: center;
        min-height: 0;
      }

      .computer-hand {
        grid-area: computer;
        display: flex;
        justify-content: center;
        align-items: flex-end;
        gap: -15px;
        padding: 0.5rem;
      }

      .deck-area {
        grid-area: deck;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 0.5rem;
      }

      .center-area {
        grid-area: current;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 1rem;
      }

      .action-area {
        grid-area: actions;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 0.5rem;
      }

      .player-hand {
        grid-area: player;
        display: flex;
        justify-content: center;
        align-items: flex-start;
        gap: 0.3rem;
        flex-wrap: wrap;
        padding: 0.5rem;
        max-height: 200px;
        overflow-y: auto;
      }

      /* Card Styles - Improved for better readability */
      .card {
        width: 90px;
        height: 135px;
        border-radius: 12px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: var(--card-shadow);
        position: relative;
        font-weight: 800;
        font-size: 1rem;
        border: 3px solid rgba(255, 255, 255, 0.4);
        user-select: none;
        color: white;
        text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
      }

      /* Corner numbers for better readability */
      .card::after {
        content: attr(data-value);
        position: absolute;
        top: 8px;
        left: 8px;
        font-size: 0.8rem;
        font-weight: 900;
        opacity: 0.9;
        text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8);
      }

      .card::before {
        content: attr(data-value);
        position: absolute;
        bottom: 8px;
        right: 8px;
        font-size: 0.8rem;
        font-weight: 900;
        opacity: 0.9;
        text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8);
        transform: rotate(180deg);
      }

      .card:hover {
        transform: translateY(-8px) scale(1.05);
        box-shadow: var(--card-hover-shadow);
        z-index: 10;
      }

      .card.playable {
        animation: glow 2s infinite alternate;
        border-color: #ffd700;
        cursor: pointer;
      }

      @keyframes glow {
        from {
          box-shadow: var(--card-shadow);
        }
        to {
          box-shadow: 0 0 20px #ffd700, var(--card-shadow);
        }
      }

      .card.red {
        background: linear-gradient(135deg, #e53e3e, #ff6b6b);
        border-color: #c53030;
        box-shadow: 0 8px 25px rgba(229, 62, 62, 0.3);
      }
      .card.blue {
        background: linear-gradient(135deg, #3182ce, #4299e1);
        border-color: #2b77cb;
        box-shadow: 0 8px 25px rgba(49, 130, 206, 0.3);
      }
      .card.green {
        background: linear-gradient(135deg, #38a169, #48bb78);
        border-color: #2f855a;
        box-shadow: 0 8px 25px rgba(56, 161, 105, 0.3);
      }
      .card.yellow {
        background: linear-gradient(135deg, #d69e2e, #ecc94b);
        border-color: #b7791f;
        color: #1a202c;
        text-shadow: 1px 1px 2px rgba(255, 255, 255, 0.5);
        box-shadow: 0 8px 25px rgba(214, 158, 46, 0.3);
      }
      .card.wild {
        background: linear-gradient(135deg, #2d3748, #4a5568);
        border: 3px solid #a0aec0;
        color: white;
        position: relative;
        overflow: hidden;
        box-shadow: 0 8px 25px rgba(45, 55, 72, 0.4);
      }

      .card.wild::after,
      .card.wild::before {
        z-index: 3;
        background: rgba(0, 0, 0, 0.8);
        padding: 2px 4px;
        border-radius: 3px;
      }

      .card.wild .card-content {
        z-index: 2 !important;
      }

      .card.wild .wild-bg {
        position: absolute;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: conic-gradient(
          from 0deg,
          #e53e3e 0deg 90deg,
          #3182ce 90deg 180deg,
          #38a169 180deg 270deg,
          #d69e2e 270deg 360deg
        );
        animation: wildRotate 4s linear infinite;
        z-index: 1;
      }

      @keyframes wildRotate {
        0% {
          transform: rotate(0deg);
        }
        100% {
          transform: rotate(360deg);
        }
      }

      .card-back {
        background: linear-gradient(135deg, #1e3c72, #2a5298);
        color: white;
        cursor: default;
      }

      .card-back:hover {
        transform: none;
        box-shadow: var(--card-shadow);
      }

      .card-number {
        font-size: 1.8rem;
        font-weight: 900;
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
        margin-bottom: 0.2rem;
      }

      .card-icon {
        font-size: 1.2rem;
        margin-bottom: 0.2rem;
        text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
      }

      .card-vocabulary {
        font-size: 0.75rem;
        font-weight: 700;
        text-align: center;
        text-transform: uppercase;
        letter-spacing: 0.5px;
        text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.7);
        margin-top: 0.2rem;
      }

      /* Deck and Draw Pile */
      .draw-deck {
        position: relative;
        cursor: pointer;
      }

      .draw-deck .card {
        position: absolute;
      }

      .draw-deck .card:nth-child(1) {
        transform: rotate(-2deg) translate(2px, 2px);
      }
      .draw-deck .card:nth-child(2) {
        transform: rotate(1deg) translate(-1px, 1px);
      }
      .draw-deck .card:nth-child(3) {
        transform: rotate(-1deg);
      }

      .current-card {
        position: relative;
        animation: slideIn 0.5s ease-out;
      }


      /* Computer Cards with thinking animation */
      .computer-hand .card {
        margin-left: -12px;
        transform: rotate(var(--rotation, 0deg));
      }

      .computer-hand .card:nth-child(odd) {
        --rotation: -3deg;
      }

      .computer-hand .card:nth-child(even) {
        --rotation: 3deg;
      }

      .computer-thinking .card {
        animation: cardThinking 0.8s infinite ease-in-out;
      }

      @keyframes cardThinking {
        0%,
        100% {
          transform: rotate(var(--rotation, 0deg)) translateY(0);
        }
        50% {
          transform: rotate(var(--rotation, 0deg)) translateY(-5px);
        }
      }

      /* Action Buttons */
      .action-buttons {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
      }

      .action-btn {
        padding: 0.6rem 1rem;
        border: none;
        border-radius: 10px;
        font-weight: 600;
        font-size: 0.8rem;
        cursor: pointer;
        transition: all 0.3s ease;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.4rem;
        min-width: 120px;
      }

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

      .uno-btn {
        background: var(--error-color);
        color: white;
        animation: shake 0.5s;
      }

      @keyframes shake {
        0%,
        100% {
          transform: translateX(0);
        }
        25% {
          transform: translateX(-3px);
        }
        75% {
          transform: translateX(3px);
        }
      }

      .action-btn:hover:not(:disabled) {
        transform: translateY(-2px);
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
      }

      .action-btn:disabled {
        opacity: 0.5;
        cursor: not-allowed;
        transform: none;
      }

      /* Color Picker Modal */
      .color-picker {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.8);
        display: none;
        align-items: center;
        justify-content: center;
        z-index: 2000;
      }

      .color-picker.show {
        display: flex;
      }

      .color-options {
        background: white;
        padding: 1.5rem;
        border-radius: 20px;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
        box-shadow: var(--card-hover-shadow);
      }

      .color-option {
        width: 70px;
        height: 70px;
        border-radius: 50%;
        border: none;
        cursor: pointer;
        transition: all 0.3s ease;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.2rem;
        color: white;
        font-weight: 700;
      }

      .color-option:hover {
        transform: scale(1.1);
        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
      }

      .color-option.red {
        background: var(--red-card);
      }
      .color-option.blue {
        background: var(--blue-card);
      }
      .color-option.green {
        background: var(--green-card);
      }
      .color-option.yellow {
        background: var(--yellow-card);
      }

      /* Game Messages */
      .game-message {
        position: fixed;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        background: white;
        padding: 2rem;
        border-radius: 20px;
        box-shadow: var(--card-hover-shadow);
        text-align: center;
        z-index: 2000;
        display: none;
        max-width: 400px;
      }

      .game-message.show {
        display: block;
        animation: messageSlide 0.5s ease-out;
      }

      @keyframes messageSlide {
        from {
          transform: translate(-50%, -50%) scale(0);
          opacity: 0;
        }
        to {
          transform: translate(-50%, -50%) scale(1);
          opacity: 1;
        }
      }

      .message-title {
        font-size: 1.4rem;
        font-weight: 700;
        margin-bottom: 1rem;
        color: var(--primary-color);
      }

      .message-text {
        color: var(--text-secondary);
        margin-bottom: 1.5rem;
        line-height: 1.5;
      }

      .message-btn {
        padding: 0.75rem 1.5rem;
        background: var(--primary-color);
        color: white;
        border: none;
        border-radius: 12px;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.3s ease;
      }

      .message-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
      }

      /* Score and Statistics */
      .game-stats {
        background: rgba(255, 255, 255, 0.9);
        border-radius: 10px;
        padding: 0.8rem;
        text-align: center;
        font-size: 0.8rem;
        font-weight: 600;
        color: var(--text-secondary);
      }

      /* Responsive Design */
      @media (max-width: 768px) {
        .game-container {
          padding: 0.5rem;
          height: calc(100vh - 70px);
        }

        .game-board {
          grid-template-areas:
            "computer"
            "deck"
            "current"
            "actions"
            "player";
          grid-template-columns: 1fr;
          grid-template-rows: auto auto auto auto 1fr;
          gap: 0.5rem;
        }

        .card {
          width: 70px;
          height: 105px;
          font-size: 0.8rem;
        }

        .card-number {
          font-size: 1.4rem;
        }

        .card-icon {
          font-size: 1rem;
        }

        .card-vocabulary {
          font-size: 0.65rem;
        }
        .game-status {
          flex-direction: column;
          gap: 0.5rem;
          text-align: center;
          padding: 0.8rem;
        }

        .header-content {
          padding: 0 0.5rem;
        }

        .game-title {
          font-size: 1.2rem;
        }

        .game-controls {
          gap: 0.3rem;
        }

        .control-btn {
          padding: 0.3rem 0.6rem;
          font-size: 0.75rem;
        }

        .color-options {
          grid-template-columns: repeat(4, 1fr);
          padding: 1rem;
        }

        .color-option {
          width: 50px;
          height: 50px;
          font-size: 1rem;
        }

        .player-hand {
          max-height: 150px;
          gap: 0.2rem;
        }
      }

      /* Loading Animation */
      .loading {
        display: inline-block;
        width: 16px;
        height: 16px;
        border: 2px solid rgba(255, 255, 255, 0.3);
        border-radius: 50%;
        border-top-color: #fff;
        animation: spin 1s ease-in-out infinite;
      }

      @keyframes spin {
        to {
          transform: rotate(360deg);
        }
      }

      /* Sound Toggle */
      .sound-toggle {
        position: fixed;
        top: 100px;
        right: 20px;
        background: rgba(255, 255, 255, 0.9);
        border: none;
        border-radius: 50%;
        width: 45px;
        height: 45px;
        cursor: pointer;
        font-size: 1.2rem;
        color: var(--primary-color);
        box-shadow: var(--card-shadow);
        transition: all 0.3s ease;
      }

      .sound-toggle:hover {
        transform: scale(1.1);
      }

      /* Hint System */
      .hint-overlay {
        position: absolute;
        top: -30px;
        left: 50%;
        transform: translateX(-50%);
        background: var(--primary-color);
        color: white;
        padding: 0.3rem 0.6rem;
        border-radius: 15px;
        font-size: 0.7rem;
        white-space: nowrap;
        z-index: 100;
        opacity: 0;
        animation: hintFade 3s ease-in-out;
      }

      @keyframes hintFade {
        0%,
        100% {
          opacity: 0;
          transform: translateX(-50%) translateY(5px);
        }
        20%,
        80% {
          opacity: 1;
          transform: translateX(-50%) translateY(0);
        }
      }

      /* Combo indicator */
      .combo-indicator {
        position: fixed;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        background: linear-gradient(45deg, #ff6b6b, #ffd93d);
        color: white;
        padding: 1rem 2rem;
        border-radius: 20px;
        font-size: 1.5rem;
        font-weight: bold;
        z-index: 1500;
        animation: comboShow 2s ease-out forwards;
        pointer-events: none;
      }

      @keyframes comboShow {
        0% {
          opacity: 0;
          transform: translate(-50%, -50%) scale(0) rotate(180deg);
        }
        50% {
          opacity: 1;
          transform: translate(-50%, -50%) scale(1.2) rotate(0deg);
        }
        100% {
          opacity: 0;
          transform: translate(-50%, -50%) scale(1) rotate(0deg);
        }
      }

      /* Enhanced card hover effects */
      .card.enhanced-hover {
        transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
      }

      .card.enhanced-hover:hover {
        transform: translateY(-12px) scale(1.05) rotateX(10deg);
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
      }

      /* Particle effects */
      .particle {
        position: absolute;
        pointer-events: none;
        border-radius: 50%;
        animation: particleFloat 1s ease-out forwards;
      }

      @keyframes particleFloat {
        0% {
          opacity: 1;
          transform: scale(1) rotate(0deg);
        }
        100% {
          opacity: 0;
          transform: scale(0) rotate(360deg) translateY(-50px);
        }
      }

      /* Achievement notification */
      .achievement-notification {
        position: fixed;
        top: 20px;
        right: 20px;
        background: linear-gradient(135deg, #ffd700, #ffed4e);
        color: #1f2937;
        padding: 1rem;
        border-radius: 15px;
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
        z-index: 2000;
        animation: achievementSlide 4s ease-out forwards;
        max-width: 300px;
      }

      @keyframes achievementSlide {
        0% {
          opacity: 0;
          transform: translateX(100%);
        }
        10%,
        90% {
          opacity: 1;
          transform: translateX(0);
        }
        100% {
          opacity: 0;
          transform: translateX(100%);
        }
      }

      /* Power-up effects */
      .power-up-glow {
        animation: powerUpGlow 2s infinite alternate;
        border: 2px solid gold !important;
      }

      @keyframes powerUpGlow {
        0% {
          box-shadow: 0 0 5px gold;
        }
        100% {
          box-shadow: 0 0 20px gold, 0 0 30px gold;
        }
      }

      /* Challenge progress animations */
      .challenge-complete {
        animation: challengePulse 1s ease-out;
      }

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

      /* Disabled button styles */
      .message-btn:disabled {
        background: #6b7280 !important;
        cursor: not-allowed;
        opacity: 0.6;
      }

      /* Quiz feedback styles */
      .quiz-correct {
        background: var(--success-color) !important;
        animation: correctAnswer 0.5s ease-out;
      }

      .quiz-incorrect {
        background: var(--error-color) !important;
        animation: incorrectAnswer 0.5s ease-out;
      }

      @keyframes correctAnswer {
        0% {
          transform: scale(1);
        }
        50% {
          transform: scale(1.1);
        }
        100% {
          transform: scale(1);
        }
      }

      @keyframes incorrectAnswer {
        0% {
          transform: translateX(0);
        }
        25% {
          transform: translateX(-5px);
        }
        75% {
          transform: translateX(5px);
        }
        100% {
          transform: translateX(0);
        }
      }

      /* 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 Styles for Keyboard Navigation */
      .card:focus-visible,
      .control-btn:focus-visible,
      .action-btn:focus-visible,
      .message-btn:focus-visible,
      .color-option:focus-visible {
        outline: 3px solid var(--primary-color);
        outline-offset: 2px;
      }

      /* 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;
        }
      }

      /* High Contrast Support */
      @media (prefers-contrast: high) {
        .card {
          border-width: 4px;
          font-weight: 900;
        }

        .control-btn,
        .action-btn,
        .message-btn {
          border: 3px solid currentColor;
        }
      }

/* Ensure mobile dropdowns work properly */
      @media (max-width: 768px) {
        /* FORCE mobile menu to display full width */
        .nav-links,
        #navLinks,
        ul.nav-links {
          display: flex !important;
          position: fixed !important;
          top: 70px !important;
          left: 0 !important;
          right: 0 !important;
          bottom: 0 !important;
          width: 100vw !important;
          height: auto !important;
          min-height: calc(100vh - 70px) !important;
        }

        .nav-links.active,
        #navLinks.active,
        ul.nav-links.active {
          display: flex !important;
          max-height: calc(100vh - 70px) !important;
          height: auto !important;
        }

        /* Make sure nav links with dropdowns are clearly tappable */
        .nav-item .nav-link {
          position: relative;
          user-select: none;
          -webkit-user-select: none;
          -webkit-tap-highlight-color: rgba(70, 187, 229, 0.2);
          cursor: pointer;
        }

        /* Ensure chevron is visible and clickable */
        .nav-link .fa-chevron-down {
          transition: transform 0.3s ease !important;
          opacity: 1 !important;
          pointer-events: none; /* Let clicks go through to parent link */
        }

        /* Visual feedback when dropdown is open */
        .nav-item.mobile-open > .nav-link,
        .nav-item.mobile-dropdown-open > .nav-link {
          background: rgba(70, 187, 229, 0.15) !important;
          border-color: var(--primary-color, #46bbe5) !important;
        }

        /* Make dropdowns smoother */
        .dropdown {
          transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1),
            padding 0.4s cubic-bezier(0.4, 0, 0.2, 1) !important;
        }

        /* Ensure dropdown items are visible when parent is open */
        .nav-item.mobile-open .dropdown,
        .nav-item.mobile-dropdown-open .dropdown {
          display: block !important;
          visibility: visible !important;
          opacity: 1 !important;
          pointer-events: auto !important;
        }

        /* Override any conflicting hover states */
        .nav-item:hover .dropdown {
          max-height: 0 !important;
          padding: 0 !important;
        }

        .nav-item.mobile-open:hover .dropdown,
        .nav-item.mobile-dropdown-open:hover .dropdown {
          max-height: 600px !important;
          padding: 0.75rem 0.5rem !important;
        }
      }