mind-gym/index.html at master · LessUp/mind-gym · GitHub

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<!doctype html>
<html lang="en" dir="ltr">
  <head>
    <!-- Critical: Character encoding must be first -->
    <meta charset="UTF-8" />

    <!-- Critical: Viewport for responsive design -->
    <meta name="viewport" content="width=device-width, initial-scale=1.0, viewport-fit=cover" />

    <!-- Base URL for proper resource resolution -->
    <base href="./" />

    <!-- Preconnect to external domains for faster loading -->
    <link rel="preconnect" href="https://fonts.googleapis.com" crossorigin />
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
    <link rel="dns-prefetch" href="https://github.com" />

    <!-- Primary Meta Tags -->
    <title>Mind Gym - Memory Training Game | Boost Your Cognitive Skills</title>
    <meta name="title" content="Mind Gym - Memory Training Game | Boost Your Cognitive Skills" />
    <meta
      name="description"
      content="Train your memory with Mind Gym! A browser-based memory game featuring classic matching, N-back training, daily challenges, and adaptive difficulty. Play free, no install needed."
    />
    <meta
      name="keywords"
      content="memory game, brain training, cognitive training, memory exercise, N-back, card matching, mental workout, memory improvement"
    />
    <meta name="author" content="LessUp" />
    <meta
      name="robots"
      content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1"
    />

    <!-- Canonical URL -->
    <link rel="canonical" href="https://lessup.github.io/mind-gym/" />

    <!-- Open Graph / Facebook -->
    <meta property="og:type" content="website" />
    <meta property="og:url" content="https://lessup.github.io/mind-gym/" />
    <meta property="og:title" content="Mind Gym - Memory Training Game" />
    <meta
      property="og:description"
      content="Train your memory with multiple game modes, adaptive difficulty, and progress tracking. Play free in your browser!"
    />
    <meta property="og:image" content="https://lessup.github.io/mind-gym/assets/og-image.png" />
    <meta property="og:image:width" content="1200" />
    <meta property="og:image:height" content="630" />
    <meta property="og:image:type" content="image/png" />
    <meta property="og:site_name" content="Mind Gym" />
    <meta property="og:locale" content="en_US" />

    <!-- Twitter -->
    <meta name="twitter:card" content="summary_large_image" />
    <meta name="twitter:url" content="https://lessup.github.io/mind-gym/" />
    <meta name="twitter:title" content="Mind Gym - Memory Training Game" />
    <meta
      name="twitter:description"
      content="Train your memory with multiple game modes, adaptive difficulty, and progress tracking. Play free in your browser!"
    />
    <meta name="twitter:image" content="https://lessup.github.io/mind-gym/assets/og-image.png" />

    <!-- PWA Manifest -->
    <link rel="manifest" href="./manifest.webmanifest" />

    <!-- Icons -->
    <link rel="icon" type="image/svg+xml" href="./assets/icon.svg" />
    <link rel="icon" type="image/png" sizes="32x32" href="./assets/icon-72.png" />
    <link rel="apple-touch-icon" sizes="180x180" href="./assets/apple-touch-icon.png" />
    <link rel="mask-icon" href="./assets/icon.svg" color="#4f46e5" />

    <!-- Theme Colors -->
    <meta name="theme-color" content="#4f46e5" media="(prefers-color-scheme: light)" />
    <meta name="theme-color" content="#1e1b4b" media="(prefers-color-scheme: dark)" />
    <meta name="color-scheme" content="light dark" />

    <!-- Mobile App Capable -->
    <meta name="mobile-web-app-capable" content="yes" />
    <meta name="apple-mobile-web-app-capable" content="yes" />
    <meta name="apple-mobile-web-app-status-bar-style" content="default" />
    <meta name="apple-mobile-web-app-title" content="Mind Gym" />
    <meta name="application-name" content="Mind Gym" />
    <meta name="msapplication-TileColor" content="#4f46e5" />
    <meta name="msapplication-config" content="./browserconfig.xml" />

    <!-- Security Headers (since GitHub Pages doesn't support custom HTTP headers) -->
    <meta http-equiv="X-Frame-Options" content="DENY" />
    <meta http-equiv="X-Content-Type-Options" content="nosniff" />
    <meta name="referrer" content="strict-origin-when-cross-origin" />
    <meta http-equiv="Permissions-Policy" content="camera=(), microphone=(), geolocation=()" />

    <!-- Performance: Preload critical CSS -->
    <link rel="preload" href="./assets/app.css" as="style" />

    <!-- Styles -->
    <link rel="stylesheet" href="./assets/app.css" />

    <!-- Structured Data (JSON-LD) -->
    <script type="application/ld+json">
      {
        "@context": "https://schema.org",
        "@type": "WebApplication",
        "name": "Mind Gym",
        "description": "Browser-based memory training game with multiple modes including classic matching, N-back training, and daily challenges.",
        "url": "https://lessup.github.io/mind-gym/",
        "applicationCategory": "GameApplication",
        "genre": ["Puzzle", "Brain Training", "Memory"],
        "operatingSystem": "Any",
        "browserRequirements": "Requires JavaScript. Requires HTML5.",
        "featureList": [
          "Classic card matching",
          "N-back working memory training",
          "Daily challenges",
          "Adaptive difficulty",
          "Progress tracking",
          "Achievement system",
          "Offline support"
        ],
        "offers": {
          "@type": "Offer",
          "price": "0",
          "priceCurrency": "USD"
        },
        "author": {
          "@type": "Organization",
          "name": "LessUp",
          "url": "https://github.com/LessUp"
        },
        "publisher": {
          "@type": "Organization",
          "name": "LessUp"
        },
        "license": "https://github.com/LessUp/mind-gym/blob/master/LICENSE",
        "sourceOrganization": {
          "@type": "Organization",
          "name": "LessUp"
        },
        "programmingLanguage": ["JavaScript", "HTML", "CSS"],
        "inLanguage": ["en", "zh"],
        "isAccessibleForFree": true,
        "hasPart": [
          {
            "@type": "VideoGame",
            "name": "Classic Matching Mode"
          },
          {
            "@type": "VideoGame",
            "name": "N-back Training Mode"
          }
        ]
      }
    </script>

    <!-- Inline Critical CSS for Above-the-Fold Content -->
    <style>
      /* Critical loading styles */
      body {
        margin: 0;
        padding: 0;
        min-height: 100vh;
      }

      /* Prevent FOUC */
      .loading {
        opacity: 0;
        animation: fadeIn 0.3s ease-in forwards;
      }

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

      /* Critical layout styles */
      #app {
        min-height: 100vh;
        display: flex;
        flex-direction: column;
      }

      /* Loading spinner */
      .initial-loader {
        position: fixed;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 48px;
        height: 48px;
        border: 4px solid #e2e8f0;
        border-top-color: #4f46e5;
        border-radius: 50%;
        animation: spin 1s linear infinite;
      }

      @keyframes spin {
        to {
          transform: translate(-50%, -50%) rotate(360deg);
        }
      }

      /* Card flip animation */
      .card {
        perspective: 1000px;
      }
      .card-inner {
        transform-style: preserve-3d;
        transition: transform 0.4s ease;
      }
      .flipped .card-inner {
        transform: rotateY(180deg);
      }
      .card-face {
        position: absolute;
        inset: 0;
        backface-visibility: hidden;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      .card-back {
        transform: rotateY(180deg);
      }
      .card {
        transition: transform 0.15s ease;
      }
      .card:hover {
        transform: translateY(-2px);
      }
      @keyframes matchPulse {
        0% {
          transform: scale(1);
        }
        50% {
          transform: scale(1.04);
        }
        100% {
          transform: scale(1);
        }
      }
      .match-pulse {
        animation: matchPulse 0.45s ease;
      }
      .no-anim * {
        transition: none !important;
        animation: none !important;
      }

      /* Update notification */
      .update-notification {
        position: fixed;
        bottom: 20px;
        left: 50%;
        transform: translateX(-50%);
        background: #4f46e5;
        color: white;
        padding: 12px 24px;
        border-radius: 8px;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
        display: none;
        z-index: 9999;
        align-items: center;
        gap: 12px;
      }

      .update-notification.show {
        display: flex;
      }

      .update-notification button {
        background: white;
        color: #4f46e5;
        border: none;
        padding: 6px 12px;
        border-radius: 4px;
        cursor: pointer;
        font-weight: 600;
      }
    </style>

    <!-- Preconnect to required origins -->
    <link rel="prefetch" href="./app.js" />
    <link rel="prefetch" href="./src/storage.js" />

    <!-- Early language detection to prevent FOUC -->
    <script>
      (function () {
        var lang = 'auto';
        try {
          var s = localStorage.getItem('memory_match__settings');
          if (s) lang = JSON.parse(s).language || 'auto';
        } catch (e) {}
        if (lang === 'auto') {
          var nav = (navigator.language || navigator.userLanguage || 'en').toLowerCase();
          lang = nav.startsWith('zh') ? 'zh' : 'en';
        }
        document.documentElement.setAttribute('data-lang', lang);
        document.documentElement.setAttribute('lang', lang === 'zh' ? 'zh-CN' : 'en');
      })();
    </script>
  </head>

  <body
    class="loading min-h-screen bg-gradient-to-b from-slate-50 to-slate-100 text-slate-800 dark:from-slate-900 dark:to-slate-950 dark:text-slate-100"
  >
    <!-- Skip to main content link for accessibility -->
    <a
      href="#app"
      class="sr-only focus:not-sr-only focus:absolute focus:top-4 focus:left-4 focus:z-50 focus:p-2 focus:bg-indigo-600 focus:text-white focus:rounded"
    >
      Skip to main content
    </a>

    <!-- Initial Loading State -->
    <div id="initial-loader" class="initial-loader" aria-hidden="true"></div>

    <!-- Update Notification -->
    <div id="update-notification" class="update-notification">
      <span>🚀 New version available!</span>
      <button id="update-btn">Update Now</button>
    </div>

    <!-- Main Application Container -->
    <div id="app" role="application" aria-label="Mind Gym Memory Training Game">
      <noscript>
        <div style="padding: 2rem; text-align: center">
          <h1>JavaScript Required</h1>
          <p>
            Mind Gym requires JavaScript to run. Please enable JavaScript in your browser settings.
          </p>
          <p>需要使用 JavaScript。请启用浏览器的 JavaScript 设置。</p>
        </div>
      </noscript>

      <!-- Main Game UI -->
      <div class="max-w-5xl mx-auto p-4 sm:p-6">
        <header class="mb-4 sm:mb-6">
          <h1 id="pageTitle" class="text-2xl sm:text-3xl font-bold">
            <span data-i18n-zh>记忆力训练 · 翻牌配对</span>
            <span data-i18n-en>Memory Training · Card Match</span>
          </h1>
          <p id="pageSubtitle" class="text-slate-500 mt-1 text-sm">
            <span data-i18n-zh>选择难度，开始翻牌配对训练记忆。完成后将记录你的最佳成绩。</span>
            <span data-i18n-en
              >Pick a difficulty and start matching cards. Your best runs are recorded.</span
            >
          </p>
        </header>

        <section class="flex flex-col sm:flex-row sm:items-end gap-3 sm:gap-4 mb-4 sm:mb-6">
          <div class="flex items-center gap-2">
            <label id="difficultyLabel" for="difficulty" class="text-sm text-slate-600">
              <span data-i18n-zh>难度</span>
              <span data-i18n-en>Difficulty</span>
            </label>
            <select
              id="difficulty"
              class="px-2 py-1.5 rounded-md border border-slate-300 bg-white text-sm"
            >
              <option id="difficultyEasy" value="easy">简单 4×4</option>
              <option id="difficultyMedium" value="medium">中等 4×5</option>
              <option id="difficultyHard" value="hard">困难 6×6</option>
            </select>
          </div>
          <!-- N-back Modal -->
          <div
            id="nbackModal"
            role="dialog"
            aria-modal="true"
            aria-labelledby="nbackTitle"
            tabindex="-1"
            class="fixed inset-0 hidden items-center justify-center bg-black/50 p-4"
          >
            <div class="w-full max-w-md rounded-2xl bg-white dark:bg-slate-800 shadow-lg p-6">
              <h2 id="nbackTitle" class="text-lg font-semibold mb-2">
                <span data-i18n-zh>N-back 训练</span>
                <span data-i18n-en>N-back Training</span>
              </h2>
              <div class="grid grid-cols-3 gap-2 text-sm mb-3">
                <label class="flex items-center justify-between">
                  <span id="nbackNLabel" class="text-slate-700">
                    <span data-i18n-zh>N 值</span>
                    <span data-i18n-en>N</span>
                  </span>
                  <select id="nbackNSelect" class="px-2 py-1 rounded-md border border-slate-300">
                    <option value="1">1</option>
                    <option value="2">2</option>
                    <option value="3">3</option>
                  </select>
                </label>
                <label class="flex items-center justify-between">
                  <span id="nbackSpeedLabel" class="text-slate-700">
                    <span data-i18n-zh>节奏(ms)</span>
                    <span data-i18n-en>Pace(ms)</span>
                  </span>
                  <select
                    id="nbackSpeedSelect"
                    class="px-2 py-1 rounded-md border border-slate-300"
                  >
                    <option value="1200">1200</option>
                    <option value="900">900</option>
                    <option value="700">700</option>
                  </select>
                </label>
                <label class="flex items-center justify-between">
                  <span id="nbackLenLabel" class="text-slate-700">
                    <span data-i18n-zh>长度</span>
                    <span data-i18n-en>Length</span>
                  </span>
                  <select id="nbackLenSelect" class="px-2 py-1 rounded-md border border-slate-300">
                    <option value="20">20</option>
                    <option value="30">30</option>
                    <option value="40">40</option>
                  </select>
                </label>
              </div>
              <div class="mb-3 text-center">
                <div
                  id="nbackStim"
                  class="inline-flex items-center justify-center w-24 h-24 rounded-xl bg-slate-100 text-3xl"
                >
                  —
                </div>
              </div>
              <p id="nbackHint" class="text-xs text-slate-500 mb-3">
                <span data-i18n-zh>按 J 判定"与 N 步前相同"</span>
                <span data-i18n-en>Press J when it matches N-back</span>
              </p>
              <div class="flex justify-end gap-3">
                <button
                  id="nbackClose"
                  class="px-4 py-2 rounded-md border border-slate-300 text-slate-700 text-sm bg-white hover:bg-slate-50"
                >
                  <span data-i18n-zh>关闭</span>
                  <span data-i18n-en>Close</span>
                </button>
                <button
                  id="nbackStart"
                  class="px-4 py-2 rounded-md bg-indigo-600 text-white text-sm font-medium hover:bg-indigo-700"
                >
                  <span data-i18n-zh>开始</span>
                  <span data-i18n-en>Start</span>
                </button>
              </div>
            </div>
          </div>
          <!-- Daily Modal -->
          <div
            id="dailyModal"
            role="dialog"
            aria-modal="true"
            aria-labelledby="dailyTitle"
            tabindex="-1"
            class="fixed inset-0 hidden items-center justify-center bg-black/50 p-4"
          >
            <div class="w-full max-w-md rounded-2xl bg-white dark:bg-slate-800 shadow-lg p-6">
              <h2 id="dailyTitle" class="text-lg font-semibold mb-2">
                <span data-i18n-zh>每日挑战</span>
                <span data-i18n-en>Daily Challenge</span>
              </h2>
              <p id="dailyInfo" class="text-sm text-slate-600 dark:text-slate-300 mb-3"></p>
              <div class="mt-2 flex justify-end gap-3">
                <button
                  id="dailyClose"
                  class="px-4 py-2 rounded-md border border-slate-300 text-slate-700 text-sm bg-white dark:bg-slate-800 hover:bg-slate-50 dark:hover:bg-slate-700"
                >
                  <span data-i18n-zh>关闭</span>
                  <span data-i18n-en>Close</span>
                </button>
                <button
                  id="dailyStart"
                  class="px-4 py-2 rounded-md bg-indigo-600 text-white text-sm font-medium hover:bg-indigo-700"
                >
                  <span data-i18n-zh>开始挑战</span>
                  <span data-i18n-en>Start</span>
                </button>
              </div>
            </div>
          </div>
          <div class="flex items-center gap-3">
            <button
              id="newGameBtn"
              class="px-3 py-2 rounded-md bg-indigo-600 text-white text-sm font-medium hover:bg-indigo-700 active:bg-indigo-800"
            >
              <span data-i18n-zh>开始/重开</span>
              <span data-i18n-en>New/Restart</span>
            </button>
            <button
              id="pauseBtn"
              class="px-3 py-2 rounded-md border border-slate-300 bg-white text-slate-700 text-sm hover:bg-slate-50"
            >
              <span data-i18n-zh>暂停</span>
              <span data-i18n-en>Pause</span>
            </button>
            <button
              id="hintBtn"
              class="px-3 py-2 rounded-md border border-slate-300 bg-white text-slate-700 text-sm hover:bg-slate-50"
            >
              <span data-i18n-zh>提示</span>
              <span data-i18n-en>Hint</span>
              <span id="hintLeft" class="ml-1">0</span>
            </button>
            <button
              id="settingsBtn"
              class="px-3 py-2 rounded-md border border-slate-300 bg-white text-slate-700 text-sm hover:bg-slate-50"
            >
              <span data-i18n-zh>设置</span>
              <span data-i18n-en>Settings</span>
            </button>
            <button
              id="guideBtn"
              class="px-3 py-2 rounded-md border border-slate-300 bg-white text-slate-700 text-sm hover:bg-slate-50"
            >
              <span data-i18n-zh>指南</span>
              <span data-i18n-en>Guide</span>
            </button>
            <button
              id="achievementsBtn"
              class="px-3 py-2 rounded-md border border-slate-300 bg-white text-slate-700 text-sm hover:bg-slate-50"
            >
              <span data-i18n-zh>成就</span>
              <span data-i18n-en>Achievements</span>
            </button>
            <button
              id="statsBtn"
              class="px-3 py-2 rounded-md border border-slate-300 bg-white text-slate-700 text-sm hover:bg-slate-50"
            >
              <span data-i18n-zh>统计</span>
              <span data-i18n-en>Stats</span>
            </button>
            <button
              id="dailyBtn"
              class="px-3 py-2 rounded-md border border-slate-300 bg-white text-slate-700 text-sm hover:bg-slate-50"
            >
              <span data-i18n-zh>每日</span>
              <span data-i18n-en>Daily</span>
            </button>
            <button
              id="nbackBtn"
              class="px-3 py-2 rounded-md border border-slate-300 bg-white text-slate-700 text-sm hover:bg-slate-50"
            >
              N-back
            </button>
          </div>
          <div class="flex-1"></div>
          <div class="flex items-center gap-4 text-sm">
            <div>
              <span id="timeLabel">
                <span data-i18n-zh>用时</span>
                <span data-i18n-en>Time</span>
              </span>
              <span
                id="time"
                class="font-semibold"
                role="status"
                aria-live="polite"
                aria-atomic="true"
                >00:00</span
              >
            </div>
            <div>
              <span id="movesLabel">
                <span data-i18n-zh>步数</span>
                <span data-i18n-en>Moves</span>
              </span>
              <span
                id="moves"
                class="font-semibold"
                role="status"
                aria-live="polite"
                aria-atomic="true"
                >0</span
              >
            </div>
            <div class="text-slate-500 dark:text-slate-400">
              <span id="bestLabel">
                <span data-i18n-zh>最佳</span>
                <span data-i18n-en>Best</span>
              </span>
              <span id="best" class="font-semibold text-slate-700 dark:text-slate-200">—</span>
            </div>
          </div>
        </section>
        <div class="mb-3">
          <div class="flex items-center justify-between text-xs text-slate-500">
            <span data-i18n-zh>进度</span>
            <span data-i18n-en>Progress</span>
            <span
              ><span id="pairsLeft">0</span> <span data-i18n-zh>对剩余</span
              ><span data-i18n-en>pairs left</span></span
            >
          </div>
          <div class="h-2 w-full bg-slate-200 rounded-full overflow-hidden">
            <div id="progressBar" class="h-full bg-indigo-500" style="width: 0%"></div>
          </div>
        </div>

        <main>
          <div id="grid" class="grid gap-3 sm:gap-4"></div>
        </main>
        <section class="mt-4 sm:mt-6">
          <h3 id="leaderboardTitle" class="text-sm font-semibold text-slate-600">
            <span data-i18n-zh>排行榜（当前难度）</span>
            <span data-i18n-en>Leaderboard (current difficulty)</span>
          </h3>
          <ul id="leaderboardList" class="mt-2 text-sm text-slate-700 space-y-1"></ul>
        </section>
      </div>

      <!-- Win Modal -->
      <div
        id="winModal"
        role="dialog"
        aria-modal="true"
        aria-labelledby="winTitle"
        tabindex="-1"
        class="fixed inset-0 hidden items-center justify-center bg-black/50 p-4"
      >
        <div class="w-full max-w-sm rounded-2xl bg-white dark:bg-slate-800 shadow-lg p-6">
          <div class="text-center">
            <div
              class="mx-auto mb-3 h-12 w-12 rounded-full bg-emerald-100 text-emerald-700 flex items-center justify-center text-2xl"
            >
              🎉
            </div>
            <h2 id="winTitle" class="text-xl font-semibold mb-2">
              <span data-i18n-zh>太棒了！全部配对完成</span>
              <span data-i18n-en>Great! All matched</span>
            </h2>
            <div id="ratingStars" class="mb-1 text-lg"></div>
            <p id="winStats" class="text-slate-600 dark:text-slate-300 mb-4 text-sm"></p>
            <div class="flex items-center justify-center gap-3">
              <button
                id="playAgain"
                class="px-4 py-2 rounded-md bg-indigo-600 text-white text-sm font-medium hover:bg-indigo-700"
              >
                <span data-i18n-zh>再来一局</span>
                <span data-i18n-en>Play Again</span>
              </button>
              <button
                id="shareBtn"
                class="px-4 py-2 rounded-md bg-emerald-600 text-white text-sm font-medium hover:bg-emerald-700"
              >
                <span data-i18n-zh>分享战绩</span>
                <span data-i18n-en>Share</span>
              </button>
              <button
                id="closeModal"
                class="px-4 py-2 rounded-md border border-slate-300 text-slate-700 dark:text-slate-200 text-sm bg-white dark:bg-slate-800 hover:bg-slate-50 dark:hover:bg-slate-700"
              >
                <span data-i18n-zh>返回</span>
                <span data-i18n-en>Back</span>
              </button>
            </div>
          </div>
        </div>
      </div>

      <!-- Lose Modal -->
      <div
        id="loseModal"
        role="dialog"
        aria-modal="true"
        aria-labelledby="loseTitle"
        tabindex="-1"
        class="fixed inset-0 hidden items-center justify-center bg-black/50 p-4"
      >
        <div class="w-full max-w-sm rounded-2xl bg-white dark:bg-slate-800 shadow-lg p-6">
          <div class="text-center">
            <div
              class="mx-auto mb-3 h-12 w-12 rounded-full bg-rose-100 text-rose-700 flex items-center justify-center text-2xl"
            >
              ⏳
            </div>
            <h2 id="loseTitle" class="text-xl font-semibold mb-2">
              <span data-i18n-zh>时间到，挑战失败</span>
              <span data-i18n-en>Time Up</span>
            </h2>
            <p id="loseDesc" class="text-slate-600 dark:text-slate-300 mb-4 text-sm">
              <span data-i18n-zh>可在设置中调整"限时时长"，或重试本局。</span>
              <span data-i18n-en>You can adjust countdown in Settings or retry this round.</span>
            </p>
            <div class="flex items-center justify-center gap-3">
              <button
                id="failRetry"
                class="px-4 py-2 rounded-md bg-indigo-600 text-white text-sm font-medium hover:bg-indigo-700"
              >
                <span data-i18n-zh>重试</span>
                <span data-i18n-en>Retry</span>
              </button>
              <button
                id="failClose"
                class="px-4 py-2 rounded-md border border-slate-300 text-slate-700 dark:text-slate-200 text-sm bg-white dark:bg-slate-800 hover:bg-slate-50 dark:hover:bg-slate-700"
              >
                <span data-i18n-zh>返回</span>
                <span data-i18n-en>Back</span>
              </button>
            </div>
          </div>
        </div>
      </div>

      <!-- Pause Overlay -->
      <div
        id="pauseOverlay"
        role="dialog"
        aria-modal="true"
        aria-labelledby="pauseTitle"
        tabindex="-1"
        class="fixed inset-0 hidden items-center justify-center bg-black/50 p-4"
      >
        <div
          class="w-full max-w-sm rounded-2xl bg-white dark:bg-slate-800 shadow-lg p-6 text-center"
        >
          <div
            class="mx-auto mb-3 h-12 w-12 rounded-full bg-yellow-100 text-yellow-700 flex items-center justify-center text-2xl"
          >
            ⏸️
          </div>
          <h2 id="pauseTitle" class="text-xl font-semibold mb-2">
            <span data-i18n-zh>已暂停</span>
            <span data-i18n-en>Paused</span>
          </h2>
          <p class="text-slate-600 mb-4 text-sm">
            <span data-i18n-zh>点击继续恢复游戏</span>
            <span data-i18n-en>Click resume to continue</span>
          </p>
          <button
            id="resumeBtn"
            class="px-4 py-2 rounded-md bg-indigo-600 text-white text-sm font-medium hover:bg-indigo-700"
          >
            <span data-i18n-zh>继续</span>
            <span data-i18n-en>Resume</span>
          </button>
        </div>
      </div>

      <!-- Settings Modal -->
      <div
        id="settingsModal"
        role="dialog"
        aria-modal="true"
        aria-labelledby="settingsTitle"
        tabindex="-1"
        class="fixed inset-0 hidden items-center justify-center bg-black/50 p-4"
      >
        <div class="w-full max-w-md rounded-2xl bg-white dark:bg-slate-800 shadow-lg p-6">
          <h2 id="settingsTitle" class="text-lg font-semibold mb-4">
            <span data-i18n-zh>设置</span>
            <span data-i18n-en>Settings</span>
          </h2>
          <div class="space-y-4">
            <label class="flex items-center justify-between">
              <span id="settingSoundLabel" class="text-sm text-slate-700">
                <span data-i18n-zh>声音</span>
                <span data-i18n-en>Sound</span>
              </span>
              <input id="settingSound" type="checkbox" class="h-4 w-4" />
            </label>
            <label class="flex items-center justify-between">
              <span id="settingVibrateLabel" class="text-sm text-slate-700">
                <span data-i18n-zh>震动</span>
                <span data-i18n-en>Vibration</span>
              </span>
              <input id="settingVibrate" type="checkbox" class="h-4 w-4" />
            </label>
            <label class="flex items-center justify-between">
              <span id="settingPreviewLabel" class="text-sm text-slate-700">
                <span data-i18n-zh>开局预览秒数</span>
                <span data-i18n-en>Preview seconds</span>
              </span>
              <input
                id="settingPreview"
                type="number"
                min="0"
                max="5"
                step="1"
                class="px-2 py-1 w-20 rounded-md border border-slate-300"
              />
            </label>
            <label class="flex items-center justify-between">
              <span id="settingAccentLabel" class="text-sm text-slate-700">
                <span data-i18n-zh>主题色</span>
                <span data-i18n-en>Accent color</span>
              </span>
              <select id="settingAccent" class="px-2 py-1 rounded-md border border-slate-300">
                <option id="accentIndigo" value="indigo">靛蓝</option>
                <option id="accentEmerald" value="emerald">翡翠绿</option>
                <option id="accentRose" value="rose">玫瑰红</option>
              </select>
            </label>
            <label class="flex items-center justify-between">
              <span id="settingThemeLabel" class="text-sm text-slate-700">
                <span data-i18n-zh>暗色模式</span>
                <span data-i18n-en>Theme mode</span>
              </span>
              <select id="settingTheme" class="px-2 py-1 rounded-md border border-slate-300">
                <option id="themeAuto" value="auto">自动</option>
                <option id="themeLight" value="light">浅色</option>
                <option id="themeDark" value="dark">深色</option>
              </select>
            </label>
            <label class="flex items-center justify-between">
              <span id="settingMotionLabel" class="text-sm text-slate-700">
                <span data-i18n-zh>减少动画</span>
                <span data-i18n-en>Motion</span>
              </span>
              <select id="settingMotion" class="px-2 py-1 rounded-md border border-slate-300">
                <option id="motionAuto" value="auto">自动</option>
                <option id="motionOn" value="on">开启</option>
                <option id="motionOff" value="off">关闭</option>
              </select>
            </label>
            <label class="flex items-center justify-between">
              <span id="settingVolumeLabel" class="text-sm text-slate-700">
                <span data-i18n-zh>音量</span>
                <span data-i18n-en>Volume</span>
              </span>
              <div class="flex items-center gap-2">
                <input id="settingVolume" type="range" min="0" max="100" step="1" class="w-40" />
                <span id="settingVolumeValue" class="text-xs text-slate-500">50%</span>
              </div>
            </label>
            <label class="flex items-center justify-between">
              <span id="settingSoundPackLabel" class="text-sm text-slate-700">
                <span data-i18n-zh>音效风格</span>
                <span data-i18n-en>Sound pack</span>
              </span>
              <select id="settingSoundPack" class="px-2 py-1 rounded-md border border-slate-300">
                <option id="soundPackClear" value="clear">清亮</option>
                <option id="soundPackElectro" value="electro">电子</option>
                <option id="soundPackSoft" value="soft">柔和</option>
              </select>
            </label>
            <label class="flex items-center justify-between">
              <span id="settingAdaptiveLabel" class="text-sm text-slate-700">
                <span data-i18n-zh>自适应训练</span>
                <span data-i18n-en>Adaptive assist</span>
              </span>
              <input id="settingAdaptive" type="checkbox" class="h-4 w-4" />
            </label>
            <label class="flex items-center justify-between">
              <span id="settingSpacedLabel" class="text-sm text-slate-700">
                <span data-i18n-zh>间隔复现（易错卡）</span>
                <span data-i18n-en>Spaced reinforcement</span>
              </span>
              <input id="settingSpaced" type="checkbox" class="h-4 w-4" />
            </label>
            <label class="flex items-center justify-between">
              <span id="settingLanguageLabel" class="text-sm text-slate-700">
                <span data-i18n-zh>语言</span>
                <span data-i18n-en>Language</span>
              </span>
              <select id="settingLanguage" class="px-2 py-1 rounded-md border border-slate-300">
                <option id="languageAuto" value="auto">自动</option>
                <option id="languageZh" value="zh">中文</option>
                <option id="languageEn" value="en">English</option>
              </select>
            </label>
            <div class="h-px bg-slate-200"></div>
            <label class="flex items-center justify-between">
              <span id="settingGameModeLabel" class="text-sm text-slate-700">
                <span data-i18n-zh>玩法</span>
                <span data-i18n-en>Mode</span>
              </span>
              <select id="settingGameMode" class="px-2 py-1 rounded-md border border-slate-300">
                <option id="gameModeClassic" value="classic">经典</option>
                <option id="gameModeCountdown" value="countdown">限时</option>
              </select>
            </label>
            <div id="countdownConfig" class="grid grid-cols-3 gap-2 text-sm">
              <label class="flex items-center justify-between col-span-1">
                <span id="countdownEasyLabel" class="text-slate-700">
                  <span data-i18n-zh>简单(s)</span>
                  <span data-i18n-en>Easy (s)</span>
                </span>
                <input
                  id="settingCountdownEasy"
                  type="number"
                  min="10"
                  max="999"
                  step="1"
                  class="w-20 px-2 py-1 rounded-md border border-slate-300"
                />
              </label>
              <label class="flex items-center justify-between col-span-1">
                <span id="countdownMediumLabel" class="text-slate-700">
                  <span data-i18n-zh>中等(s)</span>
                  <span data-i18n-en>Medium (s)</span>
                </span>
                <input
                  id="settingCountdownMedium"
                  type="number"
                  min="10"
                  max="999"
                  step="1"
                  class="w-20 px-2 py-1 rounded-md border border-slate-300"
                />
              </label>
              <label class="flex items-center justify-between col-span-1">
                <span id="countdownHardLabel" class="text-slate-700">
                  <span data-i18n-zh>困难(s)</span>
                  <span data-i18n-en>Hard (s)</span>
                </span>
                <input
                  id="settingCountdownHard"
                  type="number"
                  min="10"
                  max="999"
                  step="1"
                  class="w-20 px-2 py-1 rounded-md border border-slate-300"
                />
              </label>
            </div>
            <div class="h-px bg-slate-200"></div>
            <label class="flex items-center justify-between">
              <span id="settingCardFaceLabel" class="text-sm text-slate-700">
                <span data-i18n-zh>卡面主题</span>
                <span data-i18n-en>Card face</span>
              </span>
              <select id="settingCardFace" class="px-2 py-1 rounded-md border border-slate-300">
                <option id="cardFaceEmoji" value="emoji">Emoji</option>
                <option id="cardFaceNumbers" value="numbers">数字</option>
                <option id="cardFaceLetters" value="letters">字母</option>
                <option id="cardFaceShapes" value="shapes">形状</option>
                <option id="cardFaceColors" value="colors">颜色</option>
              </select>
            </label>
            <div class="h-px bg-slate-200"></div>
            <div class="flex items-center justify-between">
              <span id="backupLabel" class="text-sm text-slate-700">
                <span data-i18n-zh>数据备份</span>
                <span data-i18n-en>Backup</span>
              </span>
              <div class="flex items-center gap-2">
                <button
                  id="exportBtn"
                  class="px-2 py-1 rounded-md border border-slate-300 text-sm bg-white hover:bg-slate-50"
                >
                  <span data-i18n-zh>导出</span>
                  <span data-i18n-en>Export</span>
                </button>
                <button
                  id="importBtn"
                  class="px-2 py-1 rounded-md border border-slate-300 text-sm bg-white hover:bg-slate-50"
                >
                  <span data-i18n-zh>导入</span>
                  <span data-i18n-en>Import</span>
                </button>
                <input id="importFile" type="file" accept="application/json" class="hidden" />
              </div>
            </div>
          </div>
          <div class="mt-5 flex justify-end gap-3">
            <button
              id="settingsCancel"
              class="px-4 py-2 rounded-md border border-slate-300 text-slate-700 text-sm bg-white hover:bg-slate-50"
            >
              <span data-i18n-zh>取消</span>
              <span data-i18n-en>Cancel</span>
            </button>
            <button
              id="settingsSave"
              class="px-4 py-2 rounded-md bg-indigo-600 text-white text-sm font-medium hover:bg-indigo-700"
            >
              <span data-i18n-zh>保存</span>
              <span data-i18n-en>Save</span>
            </button>
            <button
              id="resetData"
              class="px-4 py-2 rounded-md border border-rose-300 text-rose-700 text-sm bg-white hover:bg-rose-50"
            >
              <span data-i18n-zh>重置数据</span>
              <span data-i18n-en>Reset data</span>
            </button>
          </div>
        </div>
      </div>

      <!-- Guide Modal -->
      <div
        id="guideModal"
        role="dialog"
        aria-modal="true"
        aria-labelledby="guideTitle"
        tabindex="-1"
        class="fixed inset-0 hidden items-center justify-center bg-black/50 p-4"
      >
        <div class="w-full max-w-xl rounded-2xl bg-white dark:bg-slate-800 shadow-lg p-6">
          <div class="flex items-start justify-between mb-4">
            <div>
              <h2 id="guideTitle" class="text-lg font-semibold">
                <span data-i18n-zh>快速上手指南</span>
                <span data-i18n-en>Quick Start Guide</span>
              </h2>
              <p id="guideIntro" class="text-sm text-slate-600 dark:text-slate-300 mt-1">
                <span data-i18n-zh>第一次游玩？按照下面的步骤开始训练。</span>
                <span data-i18n-en>New here? Follow these steps to begin your training.</span>
              </p>
            </div>