* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    :root {
      --primary: #00f5ff;
      --secondary: #7c3aed;
      --accent: #ec4899;
      --bg-dark: #0a0a0f;
      --bg-card: rgba(20, 20, 30, 0.7);
      --text: #e5e7eb;
      --text-dim: #9ca3af;
      --success: #10b981;
      --error: #ef4444;
      --warning: #f59e0b;
    }

    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
      background: var(--bg-dark);
      color: var(--text);
      min-height: 100vh;
      overflow-x: hidden;
      position: relative;
    }

    /* Animated Background */
    body::before {
      content: '';
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background:
        radial-gradient(circle at 20% 50%, rgba(124, 58, 237, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 245, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(236, 72, 153, 0.15) 0%, transparent 50%);
      z-index: -1;
      animation: bgShift 20s ease infinite;
    }

    @keyframes bgShift {

      0%,
      100% {
        transform: scale(1) rotate(0deg);
      }

      50% {
        transform: scale(1.1) rotate(5deg);
      }
    }

    /* Grid Pattern Overlay */
    body::after {
      content: '';
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image:
        linear-gradient(rgba(0, 245, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 245, 255, 0.03) 1px, transparent 1px);
      background-size: 50px 50px;
      z-index: -1;
      opacity: 0.5;
    }

    /* Loader */
    .loader {
      position: fixed;
      inset: 0;
      background: var(--bg-dark);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      z-index: 9999;
      animation: fadeOut 0.5s ease 2s forwards;
    }

    .loader-text {
      font-size: 1.5rem;
      font-weight: 700;
      background: linear-gradient(90deg, var(--primary), var(--accent), var(--secondary));
      background-size: 200% auto;
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      animation: shimmer 2s linear infinite;
      margin-bottom: 2rem;
    }

    .load {
      width: 80px;
      height: 80px;
      border: 4px solid rgba(0, 245, 255, 0.1);
      border-top-color: var(--primary);
      border-radius: 50%;
      animation: spin 1s linear infinite;
    }

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

    @keyframes shimmer {
      to {
        background-position: 200% center;
      }
    }

    @keyframes fadeOut {
      to {
        opacity: 0;
        visibility: hidden;
      }
    }

    /* Main Wrapper */
    #wrapper {
      max-width: 1400px;
      margin: 0 auto;
      padding: 2rem;
      opacity: 0;
      animation: fadeIn 0.8s ease 2s forwards;
    }

    @keyframes fadeIn {
      to {
        opacity: 1;
      }
    }

    /* Header */
    .header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 2rem;
      gap: 1rem;
      flex-wrap: wrap;
    }

    .player-info {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      padding: 0.75rem 1.5rem;
      background: var(--bg-card);
      backdrop-filter: blur(10px);
      border-radius: 50px;
      border: 1px solid rgba(0, 245, 255, 0.2);
      font-size: 1rem;
      font-weight: 500;
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    }

    .stats-group {
      display: flex;
      gap: 1rem;
    }

    .stat-box {
      padding: 0.75rem 1.5rem;
      background: var(--bg-card);
      backdrop-filter: blur(10px);
      border-radius: 16px;
      border: 1px solid rgba(0, 245, 255, 0.2);
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 0.25rem;
      min-width: 100px;
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .stat-box:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 48px rgba(0, 245, 255, 0.2);
    }

    /* Stats Box - Hidden Labels */
    .stat-box .stat-label {
      display: none;
    }

    .stat-box .point,
    .stat-box .point2 {
      margin: 0;
      font-size: 0.875rem;
      color: var(--text-dim);
    }

    .stat-box .point span,
    .stat-box .point2 span {
      display: block;
      font-size: 1.5rem;
      font-weight: 700;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-top: 0.25rem;
    }

    /* Action Buttons */
    .action-buttons {
      position: fixed;
      top: 2rem;
      right: 2rem;
      display: flex;
      gap: 0.75rem;
      z-index: 100;
    }

    .icon-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--bg-card);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(0, 245, 255, 0.2);
      color: var(--primary);
      font-size: 1.25rem;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.3s ease;
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    }

    .icon-btn:hover {
      background: rgba(0, 245, 255, 0.1);
      transform: scale(1.1);
      box-shadow: 0 8px 32px rgba(0, 245, 255, 0.3);
    }

    /* Quiz Container */
    .quiz-container {
      background: var(--bg-card);
      backdrop-filter: blur(20px);
      border-radius: 24px;
      padding: 3rem;
      border: 1px solid rgba(0, 245, 255, 0.2);
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
      margin-bottom: 2rem;
      position: relative;
      overflow: hidden;
    }

    .quiz-container::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), var(--accent), var(--secondary));
      background-size: 200% auto;
      animation: shimmer 3s linear infinite;
    }

    #question,
    #essay-question {
      font-size: 1.75rem;
      font-weight: 600;
      margin-bottom: 2.5rem;
      line-height: 1.5;
      color: var(--text);
    }

    /* Timer */
    .timer {
      position: absolute;
      top: 2rem;
      right: 2rem;
      font-size: 1.5rem;
      font-weight: 700;
      padding: 0.75rem 1.5rem;
      background: rgba(124, 58, 237, 0.2);
      border-radius: 50px;
      border: 2px solid var(--secondary);
      color: var(--primary);
      font-family: 'Courier New', monospace;
      box-shadow: 0 0 20px rgba(124, 58, 237, 0.3);
    }

    /* Options */
    .options-container {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 1rem;
      margin-bottom: 2rem;
    }

    .option-btn {
      padding: 1.25rem 1.5rem;
      background: rgba(30, 30, 45, 0.6);
      border: 2px solid rgba(0, 245, 255, 0.2);
      border-radius: 16px;
      color: var(--text);
      font-size: 1rem;
      cursor: pointer;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
      text-align: left;
      font-weight: 500;
    }

    .option-btn::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(0, 245, 255, 0.2), transparent);
      transition: left 0.5s ease;
    }

    .option-btn:hover:not(:disabled) {
      border-color: var(--primary);
      background: rgba(0, 245, 255, 0.1);
      transform: translateX(4px);
    }

    .option-btn:hover::before {
      left: 100%;
    }

    .option-btn.correct {
      background: rgba(16, 185, 129, 0.2);
      border-color: var(--success);
      animation: pulse 0.5s ease;
    }

    .option-btn.incorrect {
      background: rgba(239, 68, 68, 0.2);
      border-color: var(--error);
      animation: shake 0.5s ease;
    }

    @keyframes pulse {

      0%,
      100% {
        transform: scale(1);
      }

      50% {
        transform: scale(1.05);
      }
    }

    @keyframes shake {

      0%,
      100% {
        transform: translateX(0);
      }

      25% {
        transform: translateX(-10px);
      }

      75% {
        transform: translateX(10px);
      }
    }

    /* Essay Input */
    .essay-input-wrapper {
      display: flex;
      gap: 1rem;
      margin-bottom: 2rem;
    }

    #essay-input {
      flex: 1;
      padding: 1rem 1.5rem;
      background: rgba(30, 30, 45, 0.6);
      border: 2px solid rgba(0, 245, 255, 0.2);
      border-radius: 16px;
      color: var(--text);
      font-size: 1.125rem;
      outline: none;
      transition: all 0.3s ease;
    }

    #essay-input:focus {
      border-color: var(--primary);
      background: rgba(0, 245, 255, 0.05);
      box-shadow: 0 0 20px rgba(0, 245, 255, 0.2);
    }

    .essay-feedback {
      padding: 1rem 1.5rem;
      border-radius: 12px;
      margin-bottom: 1.5rem;
      font-weight: 500;
      display: none;
    }

    .essay-feedback:not(:empty) {
      display: block;
    }

    /* Next Button */
    .button {
      padding: 1rem 2rem;
      background: linear-gradient(135deg, var(--secondary), var(--accent));
      border: none;
      border-radius: 16px;
      color: white;
      font-size: 1rem;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 0.75rem;
      transition: all 0.3s ease;
      box-shadow: 0 8px 24px rgba(124, 58, 237, 0.3);
      margin-top: 1.5rem;
    }

    .button:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 32px rgba(124, 58, 237, 0.5);
    }

    .button .icon {
      width: 20px;
      height: 20px;
    }

    /* Popups */
    .popup,
    .popup2,
    #name-input-popup,
    #leaderboard-popup {
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.8);
      backdrop-filter: blur(10px);
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 1000;
      animation: fadeIn 0.3s ease;
    }

    @media (max-width: 768px) {
      #leaderboard-popup .leaderboard-box {
        padding: 1.5rem;
        width: 95%;
        max-width: 400px;
      }
      
      #leaderboard-popup .leaderboard-box h2 {
        font-size: 1.5rem;
        margin-bottom: 1rem;
      }
      
      #leaderboard-popup .leaderboard-table th,
      #leaderboard-popup .leaderboard-table td {
        padding: 0.75rem;
        font-size: 0.875rem;
      }
    }

    .popup-content,
    .popup-content2,
    .name-input-box,
    .leaderboard-box {
      background: var(--bg-card);
      backdrop-filter: blur(20px);
      padding: 3rem;
      border-radius: 24px;
      border: 1px solid rgba(0, 245, 255, 0.3);
      box-shadow: 0 20px 80px rgba(0, 0, 0, 0.6);
      max-width: 500px;
      width: 90%;
      animation: slideUp 0.4s ease;
    }

    @keyframes slideUp {
      from {
        transform: translateY(30px);
        opacity: 0;
      }

      to {
        transform: translateY(0);
        opacity: 1;
      }
    }

    .popup-content h3,
    .popup-content2 h3,
    .name-input-box h2,
    .leaderboard-box h2 {
      font-size: 2rem;
      margin-bottom: 1.5rem;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .popup-content button,
    .popup-content2 button,
    .submit-name-btn,
    .close-leaderboard-btn {
      width: 100%;
      padding: 1rem;
      margin: 0.5rem 0;
      background: rgba(30, 30, 45, 0.6);
      border: 2px solid rgba(0, 245, 255, 0.3);
      border-radius: 12px;
      color: var(--text);
      font-size: 1rem;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.3s ease;
    }

    .popup-content button:hover,
    .popup-content2 button:hover,
    .submit-name-btn:hover,
    .close-leaderboard-btn:hover {
      background: linear-gradient(135deg, var(--secondary), var(--accent));
      border-color: transparent;
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(124, 58, 237, 0.4);
    }

    #player-name-input {
      width: 100%;
      padding: 1rem;
      margin: 1rem 0;
      background: rgba(30, 30, 45, 0.6);
      border: 2px solid rgba(0, 245, 255, 0.3);
      border-radius: 12px;
      color: var(--text);
      font-size: 1rem;
      outline: none;
    }

    #player-name-input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 20px rgba(0, 245, 255, 0.2);
    }

    /* Leaderboard Table */
    .leaderboard-table {
      width: 100%;
      margin: 1.5rem 0;
      border-collapse: collapse;
    }

    .leaderboard-table th,
    .leaderboard-table td {
      padding: 1rem;
      text-align: left;
      border-bottom: 1px solid rgba(0, 245, 255, 0.1);
    }

    .leaderboard-table th {
      background: rgba(124, 58, 237, 0.2);
      font-weight: 700;
      text-transform: uppercase;
      font-size: 0.875rem;
      letter-spacing: 0.05em;
      color: var(--primary);
    }

    .leaderboard-table tr:hover {
      background: rgba(0, 245, 255, 0.05);
    }

    /* Footer */
    .footer {
      text-align: center;
      padding: 2rem;
      color: var(--text-dim);
      font-size: 0.875rem;
      margin-top: 4rem;
    }

    .footer a {
      color: var(--primary);
      text-decoration: none;
      transition: color 0.3s ease;
    }

    .footer a:hover {
      color: var(--accent);
    }

    /* Responsive */
    @media (max-width: 768px) {
      #wrapper {
        padding: 1rem;
      }

      .quiz-container {
        padding: 2rem 1.5rem;
      }

      #question,
      #essay-question {
        font-size: 1.25rem;
      }

      .timer {
        position: static;
        margin-bottom: 1.5rem;
        width: fit-content;
      }

      .options-container {
        grid-template-columns: 1fr;
      }

      .action-buttons {
        top: auto;
        bottom: 2rem;
        right: 1rem;
        flex-direction: column;
      }

      .header {
        flex-direction: column;
        align-items: stretch;
      }

      .stats-group {
        justify-content: center;
      }
    }

    /* Streak Milestone */
    .streak-milestone {
      animation: milestonePopup 2s ease-out forwards;
    }

    @keyframes milestonePopup {
      0% {
        transform: translate(-50%, -50%) scale(0);
        opacity: 0;
      }

      50% {
        transform: translate(-50%, -50%) scale(1.2);
        opacity: 1;
      }

      70% {
        transform: translate(-50%, -50%) scale(0.95);
      }

      100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
      }
    }