/* ============================================================
   apps/matrix.html 样式（P0-4-T17 自动外联）
   ============================================================ */

/* Design Token：项目级 Glassmorphism 规范（与 topbar.8d4aa38f.css 一致） */
:root {
  --glass-bg-light:           rgba(255, 255, 255, 0.55);
  --glass-border-light:        rgba(15, 23, 42, 0.06);
  --glass-highlight-light:     rgba(255, 255, 255, 0.6);
  --glass-shadow-light:        rgba(15, 23, 42, 0.06);
  --glass-bg-dark:             rgba(10, 14, 39, 0.72);
  --glass-border-dark:         rgba(255, 255, 255, 0.06);
  --glass-highlight-dark:      rgba(255, 255, 255, 0.08);
  --glass-shadow-dark:         rgba(0, 0, 0, 0.32);
  --glass-blur:                blur(20px) saturate(180%);
}

  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html, body { height: 100%; }
  body {
    background:
      radial-gradient(ellipse 80% 60% at 50% 0%,  rgba(59,130,246,0.08) 0%, transparent 60%),
      radial-gradient(ellipse 50% 40% at 100% 100%, rgba(96,165,250,0.06) 0%, transparent 60%),
      var(--bg-page);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
  }
  a { color: inherit; text-decoration: none; }
  :root {
    --bg-page: #fafbfc; --bg-card: #ffffff; --bg-soft: #eff6ff; --bg-header: #ffffff;
    --text-primary: #1f2937; --text-secondary: #4b5563; --text-muted: #6b7280; --text-hint: #9ca3af;
    --text-on-accent: #ffffff; --border: #e5e7eb; --border-soft: #f1f5f9;
    --accent: #3b82f6; --accent-hover: #2563eb; --accent-soft: #60a5fa; --accent-fade: rgba(59,130,246,0.10);
    --success: #10b981; --warning: #f59e0b; --danger: #ef4444;
    /* 矩阵基础色 + 差异色（亮度+色相微调） */
    --cell:        #e0e0e0;
    --cell-darker: #d6d6d6;
  }

  /* 原顶栏「返回游戏 / 个人战绩」入口下移（顶栏已换共享组件） */
  .entry-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
  .back-link { font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--text-muted); }
  .back-link:hover { color: var(--accent); }
  .stats-link-btn { font-size: 12px; font-weight: 500; letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent); padding: 8px 18px; border: 1px solid var(--border); background: transparent; }
  .stats-link-btn:hover { background: var(--accent-fade); border-color: var(--accent); }

  main { flex: 1; padding: 48px 40px 60px; max-width: 1200px; width: 100%; margin: 0 auto; }
  .head { text-align: center; margin-bottom: 32px; }
  .head .eyebrow { font-size: 10px; letter-spacing: 0.4em; color: var(--text-muted); text-transform: uppercase; margin-bottom: 12px; }
  .head h1 { font-size: 36px; font-weight: 200; letter-spacing: 0.04em; color: var(--text-primary); line-height: 1.1; }
  .head .h1-en { display: block; margin-top: 6px; font-size: 11px; font-weight: 400; letter-spacing: 0.3em; color: var(--text-muted); text-transform: uppercase; }
  .head .sub { margin-top: 12px; font-size: 13px; color: var(--text-muted); line-height: 1.7; }

  .diff-row { display: flex; justify-content: center; gap: 8px; margin-bottom: 24px; }
  .diff-btn { padding: 9px 22px; font-size: 12px; font-weight: 500; letter-spacing: 0.16em; text-transform: uppercase; color: var(--text-secondary); background: var(--bg-card); border: 1px solid var(--border); cursor: pointer; transition: all 0.18s ease; font-family: inherit; }
  .diff-btn:hover { border-color: var(--accent); color: var(--accent); }
  .diff-btn.active { background: var(--accent); color: var(--text-on-accent); border-color: var(--accent); }

  .game-area { display: grid; grid-template-columns: 1fr 280px; gap: 32px; align-items: start; }
  .board-wrap { background: var(--bg-card); border: 1px solid var(--border-soft); padding: 24px; display: flex; flex-direction: column; align-items: center; gap: 16px; min-height: 360px; }
  .board {
    display: grid;
    gap: 4px;
    width: 480px;
    height: 480px;
    max-width: 100%;
    aspect-ratio: 1;
  }
  .board[data-n="6"]  { width: 420px; height: 420px; }
  .board[data-n="8"]  { width: 480px; height: 480px; }
  .board[data-n="10"] { width: 540px; height: 540px; }
  .cell {
    background: var(--cell);
    cursor: pointer;
    transition: transform 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
    border-radius: 2px;
  }
  .cell.darker { background: var(--cell-darker); }  /* 棋盘格阴影感 */
  .cell:hover { transform: scale(1.04); box-shadow: 0 0 0 2px rgba(59,130,246,0.25); z-index: 2; }
  .cell.error { animation: shake 0.4s; box-shadow: 0 0 0 2px var(--danger); }
  .cell.found { background: #34d399 !important; box-shadow: 0 0 0 3px var(--success); }
  @keyframes shake {
    0%,100% { transform: translateX(0); }
    25%     { transform: translateX(-4px); }
    75%     { transform: translateX(4px); }
  }

  .stats-panel { display: flex; flex-direction: column; gap: 14px; }
  .stat-card { background: var(--bg-card); border: 1px solid var(--border-soft); padding: 18px 20px; }
  .stat-card .l { font-size: 10px; letter-spacing: 0.3em; color: var(--text-muted); text-transform: uppercase; margin-bottom: 6px; }
  .stat-card .v { font-size: 32px; font-weight: 200; color: var(--text-primary); font-family: 'SF Mono', 'Consolas', monospace; line-height: 1; }
  .stat-card .v small { font-size: 14px; color: var(--text-muted); margin-left: 4px; }
  .stat-card.best { background: var(--bg-soft); border-color: var(--accent-fade); }
  .stat-card.best .l { color: var(--accent); }
  .stat-card.best .v { color: var(--accent); font-size: 20px; }
  .stat-card.error .v { color: var(--danger); }
  .btn-row { display: flex; gap: 8px; }
  .btn { flex: 1; padding: 12px 16px; font-size: 12px; font-weight: 500; letter-spacing: 0.18em; text-transform: uppercase; background: var(--bg-card); color: var(--text-primary); border: 1px solid var(--border); cursor: pointer; transition: all 0.18s ease; font-family: inherit; }
  .btn:hover { border-color: var(--accent); color: var(--accent); }
  .btn.primary { background: var(--accent); color: var(--text-on-accent); border-color: var(--accent); }
  .btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
  .hint { font-size: 12px; color: var(--text-muted); line-height: 1.7; padding: 12px 16px; background: var(--bg-card); border: 1px dashed var(--border); }
  .hint b { color: var(--text-primary); font-weight: 500; }
  .status-info { padding: 14px 18px; font-size: 12px; line-height: 1.7; color: var(--text-secondary); background: var(--bg-card); border: 1px solid var(--border-soft); }
  .status-info .guest { color: var(--warning); }

  .modal-mask { position: fixed; inset: 0; background: rgba(0,0,0,0.4); display: none; align-items: center; justify-content: center; z-index: 100; }
  .modal-mask.show { display: flex; }
  .modal { background: var(--bg-card); border: 1px solid var(--border); max-width: 420px; width: calc(100% - 40px); padding: 40px 32px; text-align: center; position: relative; }
  .modal h2 { font-size: 22px; font-weight: 400; color: var(--text-primary); margin-bottom: 6px; }
  .modal h2 .em { color: var(--accent); }
  .modal .sub { font-size: 12px; color: var(--text-muted); margin-bottom: 20px; }
  .modal .result { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 20px; }
  .modal .result .r { padding: 14px; background: var(--bg-soft); border: 1px solid var(--border-soft); }
  .modal .result .r .l { font-size: 10px; letter-spacing: 0.3em; color: var(--text-muted); text-transform: uppercase; margin-bottom: 4px; }
  .modal .result .r .v { font-size: 22px; font-weight: 300; color: var(--text-primary); font-family: 'SF Mono', 'Consolas', monospace; }
  .modal .badge { display: inline-block; padding: 4px 12px; font-size: 11px; letter-spacing: 0.2em; text-transform: uppercase; background: var(--accent-fade); color: var(--accent); margin-bottom: 20px; }
  .modal .badge.guest { background: #fef9c3; color: #a16207; }
  .modal .actions { display: flex; gap: 8px; justify-content: center; }

  .toast { position: fixed; bottom: 32px; left: 50%; transform: translateX(-50%) translateY(20px); background: var(--accent); color: var(--text-on-accent); padding: 12px 24px; font-size: 12px; font-weight: 500; letter-spacing: 0.18em; text-transform: uppercase; opacity: 0; transition: all 0.25s ease; z-index: 100; pointer-events: none; }
  .toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
  .toast.error { background: var(--danger); }

  .footer { padding: 24px 40px; font-size: 11px; color: var(--text-muted); letter-spacing: 0.18em; text-transform: uppercase; border-top: 1px solid var(--border-soft); display: flex; justify-content: space-between; align-items: center; }
  .footer .live::before { content: ''; display: inline-block; width: 6px; height: 6px; background: var(--success); border-radius: 50%; margin-right: 6px; vertical-align: middle; }

  @media (max-width: 900px) {
    .game-area { grid-template-columns: 1fr; }
    main { padding: 32px 20px 40px; }
  }