:root {
      --bg-primary: #121213;
      --bg-secondary: #1a1a1b;
      --key-bg: #818384;
      --key-text: #fff;
      --correct: #538d4e;
      --present: #b59f3b;
      --absent: #3a3a3c;
      --border: #3a3a3c;
      --text: #fff;
    }

    body {
      font-family: 'Clear Sans', 'Helvetica Neue', Arial, sans-serif;
      background: var(--bg-primary);
      color: var(--text);
      min-height: 100dvh;
      min-height: -webkit-fill-available;
      display: flex;
      flex-direction: column;
      overflow: hidden;
      touch-action: manipulation;
      -webkit-tap-highlight-color: transparent;
      -webkit-user-select: none;
      user-select: none;
      overscroll-behavior: none;
    }

    .badges-bar {
      display: flex;
      gap: 0.5rem;
      justify-content: center;
      padding: 0.4rem 1rem;
      border-bottom: 1px solid var(--border);
    }

    .level-badge {
      background: linear-gradient(135deg, #e94560, #c73e54);
      color: #fff;
      padding: 0.2rem 0.6rem;
      border-radius: 12px;
      font-size: 0.68rem;
      font-weight: 700;
    }

    .streak-badge {
      background: linear-gradient(135deg, #ff9f43, #ee5a24);
      color: #fff;
      padding: 0.2rem 0.6rem;
      border-radius: 12px;
      font-size: 0.68rem;
      font-weight: 700;
      transition: transform 0.3s ease;
    }

    .streak-badge.pulse {
      animation: streakPulse 0.5s ease;
    }

    @keyframes streakPulse {
      0%, 100% { transform: scale(1); }
      50% { transform: scale(1.2); }
    }

    .streak-badge.multiplier {
      background: linear-gradient(135deg, #ffd700, #ff8c00);
      box-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
    }

    /* Hint Display Container */
    .hints-container {
      display: none;
      flex-direction: column;
      gap: 0.5rem;
      margin-bottom: 0.5rem;
      width: 100%;
      max-width: 350px;
    }

    .hints-container.show {
      display: flex;
    }

    .hint-item {
      background: linear-gradient(135deg, #1a2d42, #16213e);
      border: 1px solid #b59f3b;
      border-radius: 8px;
      padding: 0.6rem 1rem;
      text-align: center;
      animation: slideDown 0.3s ease;
    }

    @keyframes slideDown {
      from { opacity: 0; transform: translateY(-10px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .hint-item .hint-label {
      font-size: 0.65rem;
      color: #b59f3b;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 0.2rem;
    }

    .hint-item .hint-text {
      font-size: 0.95rem;
      color: #fff;
    }

    .hint-item .hint-letter {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 32px;
      height: 32px;
      background: #538d4e;
      border-radius: 4px;
      font-size: 1.1rem;
      font-weight: 700;
      margin: 0.2rem 0.1rem;
    }

    .hint-item .hint-letter.unknown {
      background: #3a3a3c;
    }

    .hint-item.letters-hint {
      border-color: #538d4e;
    }

    @keyframes pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.02); box-shadow: 0 0 15px rgba(83, 141, 78, 0.5); }
      100% { transform: scale(1); }
    }

    /* Game Container */
    .game-container {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      padding: 1rem;
      max-width: 500px;
      margin: 0 auto;
      width: 100%;
    }

    /* Board */
    .board {
      display: grid;
      gap: 5px;
      padding: 10px;
      flex-grow: 1;
    }

    .board.len-3 { grid-template-rows: repeat(6, 1fr); max-height: 400px; }
    .board.len-4 { grid-template-rows: repeat(6, 1fr); max-height: 400px; }
    .board.len-5 { grid-template-rows: repeat(6, 1fr); max-height: 420px; }
    .board.len-6 { grid-template-rows: repeat(6, 1fr); max-height: 420px; }
    .board.len-7 { grid-template-rows: repeat(6, 1fr); max-height: 420px; }

    .row {
      display: grid;
      gap: 5px;
    }

    .row.len-3 { grid-template-columns: repeat(3, 1fr); }
    .row.len-4 { grid-template-columns: repeat(4, 1fr); }
    .row.len-5 { grid-template-columns: repeat(5, 1fr); }
    .row.len-6 { grid-template-columns: repeat(6, 1fr); }
    .row.len-7 { grid-template-columns: repeat(7, 1fr); }

    .tile {
      border: 2px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      text-transform: uppercase;
      transition: transform 0.1s;
      aspect-ratio: 1;
    }

    /* Tile sizes based on word length */
    .board.len-3 .tile { width: 70px; height: 70px; font-size: 2.2rem; }
    .board.len-4 .tile { width: 65px; height: 65px; font-size: 2rem; }
    .board.len-5 .tile { width: 62px; height: 62px; font-size: 2rem; }
    .board.len-6 .tile { width: 52px; height: 52px; font-size: 1.6rem; }
    .board.len-7 .tile { width: 46px; height: 46px; font-size: 1.4rem; }

    .tile.filled {
      border-color: #565758;
      animation: pop 0.1s;
    }

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

    .tile.present {
      background: var(--present);
      border-color: var(--present);
    }

    .tile.absent {
      background: var(--absent);
      border-color: var(--absent);
    }

    .tile.reveal {
      animation: flip 0.5s ease forwards;
    }

    @keyframes pop {
      50% { transform: scale(1.1); }
    }

    @keyframes flip {
      0% { transform: rotateX(0); }
      50% { transform: rotateX(90deg); }
      100% { transform: rotateX(0); }
    }

    @keyframes shake {
      0%, 100% { transform: translateX(0); }
      20%, 60% { transform: translateX(-5px); }
      40%, 80% { transform: translateX(5px); }
    }

    .row.shake {
      animation: shake 0.5s;
    }

    /* Game Hint */
    .game-hint {
      text-align: center;
      color: #888;
      font-size: 0.9rem;
      padding: 0.5rem;
      margin-bottom: 0.5rem;
      animation: fadeInOut 2s ease-in-out infinite;
    }

    .game-hint.hidden {
      display: none;
    }

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

    /* Keyboard */
    .keyboard {
      margin-top: 1rem;
    }

    .keyboard-row {
      display: flex;
      justify-content: center;
      gap: 6px;
      margin-bottom: 8px;
    }

    .key {
      background: var(--key-bg);
      color: var(--key-text);
      border: none;
      border-radius: 4px;
      padding: 0;
      width: 43px;
      height: 58px;
      font-size: 0.85rem;
      font-weight: 700;
      cursor: pointer;
      text-transform: uppercase;
      transition: background 0.1s;
    }

    .key:hover {
      opacity: 0.8;
    }

    .key.wide {
      width: 65px;
      font-size: 0.75rem;
    }

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

    .key.present {
      background: var(--present);
    }

    .key.absent {
      background: var(--absent);
    }

    /* Message */
    .message {
      position: fixed;
      top: 80px;
      left: 50%;
      transform: translateX(-50%);
      background: #fff;
      color: #000;
      padding: 0.8rem 1.2rem;
      border-radius: 4px;
      font-weight: 700;
      z-index: 100;
      opacity: 0;
      transition: opacity 0.3s;
    }

    .message.show {
      opacity: 1;
    }

    /* Modal */
    .modal-overlay {
      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: 200;
    }

    .modal-overlay.show {
      display: flex;
    }

    .modal {
      background: var(--bg-secondary);
      padding: 2rem;
      border-radius: 8px;
      text-align: center;
      max-width: 90%;
      width: 350px;
      position: relative;
    }

    .modal h2 {
      margin-bottom: 1rem;
    }

    .modal p {
      color: #888;
      margin-bottom: 1.5rem;
    }

    .modal .word {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--correct);
      margin-bottom: 1rem;
    }

    .score-display {
      background: linear-gradient(135deg, #b59f3b, #8b7a2e);
      padding: 1rem 2rem;
      border-radius: 12px;
      margin-bottom: 1rem;
      animation: scoreReveal 0.5s ease;
    }

    @keyframes scoreReveal {
      from { transform: scale(0.8); opacity: 0; }
      to { transform: scale(1); opacity: 1; }
    }

    .score-value {
      font-size: 2.5rem;
      font-weight: 800;
      color: #fff;
    }

    .score-label {
      font-size: 0.8rem;
      color: rgba(255,255,255,0.8);
      text-transform: uppercase;
      letter-spacing: 2px;
    }

    .score-breakdown {
      font-size: 0.75rem;
      color: rgba(255,255,255,0.7);
      margin-top: 0.5rem;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 0.5rem;
    }

    .score-breakdown span {
      background: rgba(255,255,255,0.1);
      padding: 0.2rem 0.5rem;
      border-radius: 4px;
    }

    .score-breakdown .bonus {
      color: #90EE90;
    }

    .score-breakdown .penalty {
      color: #ff6b6b;
    }

    .personal-best {
      margin-top: 0.5rem;
      font-size: 0.8rem;
      color: #ffd700;
      font-weight: 600;
    }

    .personal-best.new-record {
      animation: newRecord 0.5s ease;
    }

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

    /* XP Display */
    .xp-display {
      background: linear-gradient(135deg, #6b5b95, #4a4169);
      padding: 0.75rem 1.5rem;
      border-radius: 8px;
      margin-bottom: 1rem;
      animation: scoreReveal 0.5s ease 0.2s both;
    }

    .xp-earned {
      font-size: 1.2rem;
      font-weight: 700;
      color: #90EE90;
    }

    .xp-total {
      font-size: 0.85rem;
      color: rgba(255,255,255,0.7);
      margin-left: 0.5rem;
    }

    .daily-bonus {
      background: linear-gradient(135deg, #ffd700, #ff8c00);
      color: #000;
      padding: 0.2rem 0.5rem;
      border-radius: 4px;
      font-size: 0.75rem;
      font-weight: 700;
      margin-left: 0.5rem;
      animation: dailyBonusPulse 1s ease infinite;
    }

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

    /* Achievement Toast */
    .achievement-toast {
      position: fixed;
      top: 20px;
      right: -300px;
      background: linear-gradient(135deg, #b59f3b, #8b7a2e);
      padding: 1rem 1.5rem;
      border-radius: 12px;
      display: flex;
      align-items: center;
      gap: 1rem;
      z-index: 2000;
      box-shadow: 0 4px 20px rgba(0,0,0,0.3);
      transition: right 0.3s ease;
      max-width: 280px;
    }

    .achievement-toast.show {
      right: 20px;
    }

    .achievement-icon {
      font-size: 2rem;
    }

    .achievement-info {
      color: #fff;
    }

    .achievement-name {
      font-weight: 700;
      font-size: 1rem;
    }

    .achievement-desc {
      font-size: 0.8rem;
      opacity: 0.9;
    }

    /* Confetti */
    .confetti-container {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
      z-index: 1500;
      overflow: hidden;
    }

    .confetti {
      position: absolute;
      width: 10px;
      height: 10px;
      top: -10px;
      animation: confettiFall 3s ease-out forwards;
    }

    @keyframes confettiFall {
      0% {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
      }
      100% {
        transform: translateY(100vh) rotate(720deg);
        opacity: 0;
      }
    }

    /* Level Up Effect */
    .levelup-container {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
      z-index: 1600;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .levelup-particle {
      position: absolute;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      animation: levelupBurst 1s ease-out var(--delay) forwards;
    }

    @keyframes levelupBurst {
      0% {
        transform: rotate(var(--angle)) translateX(0);
        opacity: 1;
      }
      100% {
        transform: rotate(var(--angle)) translateX(150px);
        opacity: 0;
      }
    }

    .levelup-text {
      font-size: 3rem;
      font-weight: 900;
      color: #ffd700;
      text-shadow: 0 0 20px rgba(255,215,0,0.8), 0 0 40px rgba(255,215,0,0.4);
      animation: levelupTextPop 1.5s ease-out forwards;
    }

    @keyframes levelupTextPop {
      0% { transform: scale(0); opacity: 0; }
      30% { transform: scale(1.3); opacity: 1; }
      50% { transform: scale(1); }
      100% { transform: scale(1); opacity: 0; }
    }

    .modal button {
      background: var(--correct);
      color: #fff;
      border: none;
      padding: 0.8rem 2rem;
      border-radius: 4px;
      font-size: 1rem;
      font-weight: 700;
      cursor: pointer;
      margin: 0.5rem;
    }

    .modal button.secondary {
      background: var(--key-bg);
    }

    .modal-close {
      position: absolute;
      top: 0.75rem;
      right: 0.75rem;
      background: rgba(255,255,255,0.1);
      border: none;
      color: #888;
      font-size: 1.5rem;
      cursor: pointer;
      padding: 0.5rem 0.75rem;
      line-height: 1;
      border-radius: 4px;
      transition: all 0.2s;
      z-index: 10;
    }

    .modal-close:hover {
      color: #fff;
      background: rgba(255,255,255,0.2);
    }

    .modal-close:active {
      transform: scale(0.95);
    }

    /* Help Modal */
    .help-modal {
      text-align: left;
      width: 400px;
      position: relative;
    }

    .help-modal h2 {
      text-align: center;
      margin-bottom: 1.5rem;
    }

    .help-modal p {
      color: #fff;
      margin-bottom: 1rem;
      line-height: 1.5;
    }

    .help-modal .rule {
      margin-bottom: 1.5rem;
    }

    .example-row {
      display: flex;
      gap: 5px;
      margin: 0.75rem 0;
    }

    .example-tile {
      width: 40px;
      height: 40px;
      border: 2px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      font-weight: 700;
      text-transform: uppercase;
    }

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

    .example-tile.present {
      background: var(--present);
      border-color: var(--present);
    }

    .example-tile.absent {
      background: var(--absent);
      border-color: var(--absent);
    }

    .help-modal .hint {
      font-size: 0.9rem;
      color: #888;
    }

    .stats {
      display: flex;
      justify-content: center;
      gap: 1.5rem;
      margin: 1rem 0;
    }

    .stat {
      text-align: center;
    }

    .stat-value {
      font-size: 2rem;
      font-weight: 700;
    }

    .stat-label {
      font-size: 0.75rem;
      color: #888;
    }

    /* Responsive - Medium screens */
    @media (max-width: 500px) {
      .keyboard-row {
        gap: 4px;
      }

      .key {
        width: 36px;
        height: 54px;
        font-size: 0.8rem;
      }

      .key.wide {
        width: 52px;
        font-size: 0.65rem;
      }

    }

    /* Responsive - Small screens */
    @media (max-width: 400px) {
      .board.len-3 .tile { width: 60px; height: 60px; font-size: 1.8rem; }
      .board.len-4 .tile { width: 55px; height: 55px; font-size: 1.6rem; }
      .board.len-5 .tile { width: 50px; height: 50px; font-size: 1.5rem; }
      .board.len-6 .tile { width: 42px; height: 42px; font-size: 1.2rem; }
      .board.len-7 .tile { width: 36px; height: 36px; font-size: 1rem; }

      .keyboard-row {
        gap: 3px;
        margin-bottom: 6px;
      }

      .key {
        width: 30px;
        height: 48px;
        font-size: 0.7rem;
        border-radius: 3px;
      }

      .key.wide {
        width: 45px;
        font-size: 0.6rem;
      }

      .badges-row {
        flex-wrap: wrap;
        gap: 0.3rem;
      }

      .level-badge, .streak-badge {
        font-size: 0.75rem;
        padding: 0.2rem 0.5rem;
      }

      .game-container {
        padding: 0.5rem;
      }

      .hints-container {
        padding: 0.5rem;
        font-size: 0.85rem;
      }
    }

    /* Extra small screens */
    @media (max-width: 350px) {
      .key {
        width: 26px;
        height: 44px;
        font-size: 0.65rem;
      }

      .key.wide {
        width: 40px;
      }

      .board.len-7 .tile { width: 32px; height: 32px; font-size: 0.9rem; }
    }

    /* Mobile 375px */
    @media (max-width: 380px) {
      /* Ensure keyboard fits */
      .keyboard {
        padding: 0 2px;
      }

      .keyboard-row {
        gap: 2px;
        margin-bottom: 4px;
      }

      .key {
        width: calc((100vw - 20px) / 10 - 3px);
        min-width: 24px;
        max-width: 32px;
        height: 42px;
        font-size: 0.65rem;
        padding: 0;
      }

      .key.wide {
        width: calc((100vw - 20px) / 10 * 1.5);
        min-width: 36px;
        max-width: 48px;
        font-size: 0.55rem;
      }
    }

    /* Auth Modal */
    .auth-modal {
      max-width: 320px;
    }

    .auth-modal h2 {
      margin-bottom: 1rem;
    }

    .auth-modal p {
      color: #888;
      font-size: 0.9rem;
      margin-bottom: 1.5rem;
    }

    .google-btn {
      background: #fff;
      color: #333;
      border: none;
      padding: 0.8rem 1.5rem;
      border-radius: 8px;
      font-size: 1rem;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      width: 100%;
      margin-bottom: 1rem;
    }

    .google-btn:hover {
      background: #f5f5f5;
    }

    .google-btn img {
      width: 20px;
      height: 20px;
    }

    .auth-benefits {
      text-align: left;
      margin-top: 1rem;
      padding: 1rem;
      background: rgba(255,255,255,0.05);
      border-radius: 8px;
    }

    .auth-benefits h4 {
      margin-bottom: 0.5rem;
      font-size: 0.85rem;
    }

    .auth-benefits ul {
      list-style: none;
      font-size: 0.8rem;
      color: #aaa;
    }

    .auth-benefits li {
      padding: 0.3rem 0;
    }

    .auth-benefits li::before {
      content: '✓ ';
      color: #538d4e;
    }

    .cloud-sync-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
      background: rgba(83, 141, 78, 0.2);
      color: #538d4e;
      padding: 0.2rem 0.5rem;
      border-radius: 4px;
      font-size: 0.7rem;
      margin-left: 0.5rem;
    }

    .cloud-sync-badge.syncing {
      color: #b59f3b;
      background: rgba(181, 159, 59, 0.2);
    }

    /* More Games Section */
    .more-games {
      background: var(--bg-secondary);
      border-top: 1px solid var(--border);
      padding: 1.5rem;
      margin-top: auto;
    }

    .more-games-title {
      font-size: 1rem;
      color: #888;
      margin-bottom: 1rem;
      text-align: center;
    }

    .more-games-grid {
      display: flex;
      gap: 0.75rem;
      justify-content: center;
      flex-wrap: wrap;
    }

    .more-game-link {
      background: var(--bg-primary);
      border: 1px solid var(--border);
      border-radius: 10px;
      padding: 0.75rem 1rem;
      text-decoration: none;
      color: #fff;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 0.9rem;
      transition: transform 0.2s, border-color 0.2s;
    }

    .more-game-link:hover {
      transform: translateY(-2px);
      border-color: var(--correct);
    }

    .more-game-link span:first-child {
      font-size: 1.2rem;
    }

    @media (max-width: 600px) {
      .more-games { display: none; }
    }

    /* Accessibility: Respect reduced motion preferences */