:root{
    --bg:#0f1216; --panel:#1a1f27; --panel-2:#222936;
    --fg:#e6e9ef; --fg-dim:#9aa3b2; --line:#2a3140;
    --accent:#6ea8fe; --accent-2:#a78bfa; --good:#34d399; --bad:#ef4444;
    --warn:#fbbf24;
  }
  *{box-sizing:border-box}
  html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);font:15px/1.55 -apple-system,Segoe UI,Helvetica,Arial,sans-serif}
  .wrap{max-width:780px;margin:0 auto;padding:24px 18px 80px}
  h1{font-size:22px;margin:0 0 4px;display:flex;align-items:center;gap:8px}
  h1 .sub{font-size:12px;color:var(--fg-dim);font-weight:400;margin-left:auto}
  .panel{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px;margin-top:16px}
  textarea{width:100%;min-height:180px;background:var(--panel-2);color:var(--fg);border:1px solid var(--line);
    border-radius:10px;padding:12px;font:14px/1.6 ui-monospace,Menlo,Consolas,monospace;resize:vertical}
  textarea:focus{outline:none;border-color:var(--accent)}
  button{cursor:pointer;border:1px solid var(--line);background:var(--panel-2);color:var(--fg);
    border-radius:8px;padding:8px 14px;font-size:14px;transition:.15s}
  button:hover:not(:disabled){border-color:var(--accent);background:#2a3242}
  button:disabled{opacity:.4;cursor:not-allowed}
  button.primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));border:none;color:#0f1216;font-weight:600}
  button.primary:hover:not(:disabled){filter:brightness(1.1)}
  .row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
  .muted{color:var(--fg-dim);font-size:13px}
  .pill{display:inline-block;padding:3px 10px;border-radius:999px;background:var(--panel-2);border:1px solid var(--line);font-size:12px;color:var(--fg-dim)}
  .pill.good{background:rgba(52,211,153,.12);border-color:rgba(52,211,153,.3);color:var(--good)}
  .pill.bad{background:rgba(239,68,68,.12);border-color:rgba(239,68,68,.3);color:var(--bad)}

  /* practice view */
  .progress-bar{height:6px;background:var(--panel-2);border-radius:3px;overflow:hidden;margin-bottom:18px}
  .progress-bar > div{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent-2));transition:width .3s}

  .qcard{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px}
  .qcard .meta{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
  .qcard .meta .left{font-size:13px;color:var(--fg-dim)}
  .qcard .zh{font-size:17px;line-height:1.7;margin-bottom:18px;color:var(--fg)}
  .qcard .en-box{background:var(--panel-2);border:1px solid var(--line);border-radius:10px;padding:14px 16px;
    font-size:17px;line-height:1.7;min-height:60px;margin-bottom:14px;transition:filter .3s}
  .qcard .en-box.blurred{filter:blur(8px);user-select:none;cursor:pointer}
  .qcard .en-box.revealed{filter:none;color:var(--accent)}

  .controls{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:14px}
  .controls .spacer{flex:1}
  .speed-toggle{display:flex;border:1px solid var(--line);border-radius:8px;overflow:hidden}
  .speed-toggle button{border:none;border-radius:0;padding:6px 10px;font-size:13px;background:transparent}
  .speed-toggle button.active{background:var(--accent);color:#0f1216}

  .user-input{width:100%;min-height:90px;background:var(--panel-2);color:var(--fg);border:1px solid var(--line);
    border-radius:10px;padding:12px;font:15px/1.7 -apple-system,Segoe UI,sans-serif;resize:vertical}
  .user-input:focus{outline:none;border-color:var(--accent)}

  .diff-box{background:var(--panel-2);border:1px solid var(--line);border-radius:10px;padding:14px 16px;
    font-size:17px;line-height:1.8;min-height:60px;margin-top:14px;white-space:pre-wrap;word-wrap:break-word}
  .diff-box .ok{color:var(--fg)}
  .diff-box .bad{color:#fecaca;background:rgba(239,68,68,.08);border-bottom:1px solid rgba(248,113,113,.55);border-radius:2px;padding:0 1px}
  .diff-box .miss{color:#fde68a;text-decoration:underline;text-decoration-thickness:1px;text-decoration-style:dotted;text-decoration-color:rgba(251,191,36,.8);background:rgba(251,191,36,.06);border-radius:2px;padding:0 1px}
  .diff-summary{margin-top:8px;font-size:13px;color:var(--fg-dim)}

  .next-btn{margin-top:14px;width:100%;padding:12px;font-size:15px}
  .navbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
  .navbar button{padding:6px 12px;font-size:13px}

  /* settings modal */
  .modal-bg{position:fixed;inset:0;background:rgba(0,0,0,.6);display:none;align-items:center;justify-content:center;z-index:50}
  .modal-bg.show{display:flex}
  .modal{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px;max-width:560px;width:92%}
  .modal h2{margin:0 0 14px;font-size:17px}
  .modal label{display:block;font-size:13px;color:var(--fg-dim);margin:12px 0 4px}
  .modal input{width:100%;background:var(--panel-2);color:var(--fg);border:1px solid var(--line);
    border-radius:8px;padding:8px 10px;font:13px ui-monospace,Menlo,Consolas,monospace}
  .modal input:focus{outline:none;border-color:var(--accent)}

  .toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--panel-2);
    border:1px solid var(--line);padding:10px 18px;border-radius:10px;font-size:14px;z-index:100;
    opacity:0;transition:opacity .3s;pointer-events:none}
  .toast.show{opacity:1}
  .toast.error{border-color:var(--bad);color:var(--bad)}
  .toast.good{border-color:var(--good);color:var(--good)}

  .empty{text-align:center;padding:40px 20px;color:var(--fg-dim)}

  /* recent preview (input 页面下方精简版) */
  .recent-preview-item{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:8px;border:1px solid var(--line);margin-bottom:6px;background:var(--panel-2);transition:.15s}
  .recent-preview-item:last-child{margin-bottom:0}
  .recent-preview-item:hover{border-color:var(--accent)}
  .recent-preview-title{flex:1;font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--fg)}
  .recent-preview-meta{display:flex;align-items:center;gap:6px;flex-shrink:0;font-size:11px;color:var(--fg-dim)}
  .recent-preview-meta .pill{font-size:11px;padding:1px 7px}
  .recent-preview-play{flex-shrink:0;padding:3px 10px;font-size:12px;border-radius:6px;border:1px solid var(--accent);background:transparent;color:var(--accent);cursor:pointer}
  .recent-preview-play:hover{background:var(--accent);color:#0b1220}

  /* recent list */
  .recent-item{padding:10px 12px;border-radius:8px;border:1px solid var(--line);margin-bottom:8px;transition:.15s}
  .recent-item:hover{border-color:var(--accent)}
  .recent-head{display:flex;flex-direction:column;gap:6px}
  .recent-title{font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .recent-meta{display:flex;align-items:center;gap:8px;font-size:12px;flex-wrap:wrap}
  .recent-actions{display:flex;gap:6px;align-items:center}
  .recent-actions button{font-size:12px;padding:3px 10px;border-radius:6px;border:1px solid var(--line);background:var(--panel-2);color:var(--fg);cursor:pointer}
  .recent-actions .practice-all{background:var(--accent);color:#0b1220;border-color:var(--accent)}
  .recent-actions .delete-one{padding:3px 8px}
  .toggle-sent{font-size:12px;padding:2px 8px;border-radius:6px;border:1px solid var(--line);background:var(--panel-2);color:var(--fg);cursor:pointer}
  .sent-list{margin-top:10px;padding-top:8px;border-top:1px dashed var(--line);display:flex;flex-direction:column;gap:4px}
  .sent-row{display:flex;align-items:center;gap:8px;padding:5px 6px;border-radius:5px;cursor:pointer;font-size:13px}
  .sent-row:hover{background:var(--panel-2)}
  .sent-no{flex-shrink:0;width:22px;height:22px;border-radius:50%;background:var(--panel-2);border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;font-size:11px;color:var(--fg-dim)}
  .sent-en{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .sent-play{flex-shrink:0;width:24px;height:24px;border-radius:50%;border:1px solid var(--accent);background:transparent;color:var(--accent);cursor:pointer;font-size:11px;padding:0}
  .sent-play:hover{background:var(--accent);color:#0b1220}
  .sent-done{flex-shrink:0;width:20px;height:20px;display:inline-flex;align-items:center;justify-content:center;font-size:12px;color:var(--fg-dim);border-radius:50%}
  .sent-done.done{color:var(--good)}
  .sent-btn{flex-shrink:0;width:22px;height:22px;border-radius:50%;border:1px solid var(--line);background:transparent;color:var(--fg-dim);cursor:pointer;font-size:11px;padding:0;display:inline-flex;align-items:center;justify-content:center}
  .sent-btn:hover{border-color:var(--accent);color:var(--accent)}
  .sent-btn.danger:hover{border-color:var(--bad);color:var(--bad)}
  /* 悬浮计时器 */
  .float-timer{position:fixed;top:16px;right:16px;z-index:999;display:none;flex-direction:column;align-items:center;
    background:var(--panel);border:1px solid var(--accent);border-radius:12px;padding:8px 14px;
    box-shadow:0 4px 16px rgba(0,0,0,.4);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
    font-size:20px;font-weight:600;color:var(--accent);min-width:90px;text-align:center;cursor:move;user-select:none}
  .float-timer.show{display:flex}
  .float-timer .ft-label{font-size:10px;font-weight:400;color:var(--fg-dim);margin-bottom:2px;letter-spacing:.5px}
  .float-timer .ft-label.encouraging{color:var(--good);font-weight:800}
  .float-timer .ft-controls{display:flex;gap:6px;margin-top:6px}
  .float-timer .ft-btn{font-size:11px;padding:2px 8px;border-radius:4px;border:1px solid var(--line);
    background:var(--panel-2);color:var(--fg);cursor:pointer}
  .float-timer .ft-btn:hover{border-color:var(--accent);color:var(--accent)}
  .float-timer.running{border-color:var(--good);color:var(--good)}
  .float-timer.paused{border-color:var(--fg-dim);color:var(--fg-dim)}
  .nav-btn{font-size:13px;padding:4px 12px;border-radius:6px;border:1px solid var(--line);background:var(--panel);color:var(--fg);cursor:pointer;margin-left:8px}
  .nav-btn:hover{border-color:var(--accent);color:var(--accent)}

  /* 模式选择 */
  .mode-label{display:flex;align-items:center;gap:6px;padding:8px 14px;border:1px solid var(--line);border-radius:10px;cursor:pointer;transition:.15s;flex-wrap:wrap}
  .mode-label:hover{border-color:var(--accent)}
  .mode-label input[type=radio]{accent-color:var(--accent);width:16px;height:16px;margin:0}
  .mode-label.checked{border-color:var(--accent);background:rgba(110,168,254,.08)}
  .mode-label:has(input:checked){border-color:var(--accent);background:rgba(110,168,254,.08)}
  .mode-label span{font-size:14px}
  /* 整篇模式 */
  .whole-text{background:var(--panel-2);border:1px solid var(--line);border-radius:10px;padding:16px 18px;font-size:17px;line-height:1.8;max-height:400px;overflow-y:auto;margin-bottom:16px;white-space:pre-wrap;word-wrap:break-word}
  .whole-controls{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:14px}
  .whole-controls button,.whole-train-bar button,.whole-sentence-controls button{min-height:38px;white-space:nowrap}
  .whole-controls .spacer{flex:1}
  .whole-train-bar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:12px 0}
  .whole-train-bar button,.whole-sentence-controls button{font-size:12px;padding:6px 10px;border-radius:7px}
  .whole-train-bar button.active,.whole-sentence-controls button.active{border-color:var(--accent);color:var(--accent);background:rgba(34,211,238,.08)}
  .whole-sentence-controls{display:flex;gap:7px;align-items:center;flex-wrap:wrap;margin:10px 0 12px}
  .whole-sentence-list{display:grid;gap:7px;max-height:360px;overflow:auto;border:1px solid var(--line);border-radius:8px;background:#0f151d;padding:8px}
  .whole-sentence-row{display:grid;grid-template-columns:auto 1fr;gap:8px;padding:8px;border-radius:7px;border:1px solid transparent;cursor:pointer}
  .whole-sentence-row:hover{background:var(--panel-2)}
  .whole-sentence-row.active{border-color:var(--accent);background:rgba(34,211,238,.08)}
  .whole-sentence-row.marked{border-color:rgba(250,204,21,.45)}
  .whole-sentence-row.played .whole-sentence-num{color:var(--good)}
  .whole-sentence-num{font-size:12px;color:var(--fg-dim);padding-top:2px}
  .whole-sentence-en{font-size:14px;line-height:1.55;color:var(--fg)}
  .whole-sentence-zh{margin-top:4px;font-size:13px;line-height:1.5;color:var(--fg-dim)}
  .whole-current-card{display:grid;gap:6px}
  .whole-current-index{font-size:12px;color:var(--fg-dim)}
  .whole-inline-sentence{border-radius:5px;padding:1px 3px}
  .whole-inline-sentence.active{background:rgba(34,211,238,.14);color:var(--accent)}

  /* polished app layer */
  :root{
    --bg:#0c1017; --panel:#151b24; --panel-2:#1d2530; --panel-soft:#111720;
    --fg:#f2f5f8; --fg-dim:#9ba7b7; --line:#2b3544;
    --accent:#7dd3fc; --accent-2:#c4b5fd; --accent-ink:#06111a;
    --shadow:0 18px 50px rgba(0,0,0,.28);
  }
  html,body{background:linear-gradient(180deg,#0b0f16 0%,#101721 52%,#0c1017 100%);letter-spacing:0}
  body{min-height:100vh}
  button,input,textarea,select{font:inherit}
  button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{
    outline:2px solid rgba(125,211,252,.78);outline-offset:2px;
  }
  button{min-height:38px;border-color:rgba(148,163,184,.22);background:#18202b}
  button.primary{background:var(--accent);color:var(--accent-ink);box-shadow:0 10px 24px rgba(125,211,252,.16)}
  button.secondary{background:transparent;color:var(--fg);border-color:rgba(148,163,184,.28)}
  button.subtle{background:transparent;color:var(--fg-dim);border-color:transparent}
  button.danger{background:transparent;color:#fca5a5;border-color:rgba(248,113,113,.24)}
  button.primary:hover:not(:disabled){filter:none;background:#9ae6ff}
  button.secondary:hover:not(:disabled),button.subtle:hover:not(:disabled){background:#1b2430;border-color:rgba(125,211,252,.48)}
  button.danger:hover:not(:disabled){background:rgba(239,68,68,.12);border-color:rgba(248,113,113,.46)}
  .wrap{max-width:920px;padding:26px 20px 88px}
  .app-header{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:18px}
  .brand{min-width:0}
  .eyebrow{margin:0 0 3px;color:var(--accent);font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}
  h1{display:block;font-size:26px;line-height:1.18;margin:0;letter-spacing:0}
  h1 .sub{display:block;margin:6px 0 0;font-size:13px;color:var(--fg-dim)}
  .header-actions{display:flex;gap:8px;align-items:center;flex-shrink:0}
  .header-actions button{white-space:nowrap;min-width:96px}
  .panel{background:rgba(21,27,36,.86);border-color:rgba(148,163,184,.18);box-shadow:var(--shadow);border-radius:12px}
  .input-panel{padding:22px}
  .input-intro{margin:0 0 14px;color:var(--fg-dim)}
  .mode-switch{display:inline-flex;gap:0;padding:4px;border:1px solid rgba(148,163,184,.22);border-radius:12px;background:#101720;margin-bottom:14px}
  .mode-label{border:0;border-radius:8px;padding:9px 14px;gap:7px;flex-wrap:nowrap}
  .mode-label input[type=radio]{position:absolute;opacity:0;pointer-events:none}
  .mode-label .mode-title{font-weight:700;color:var(--fg)}
  .mode-label .mode-desc{display:none}
  .mode-label.checked,.mode-label:has(input:checked){background:#223044;border-color:transparent}
  .mode-help{margin:-4px 0 14px;color:var(--fg-dim);font-size:13px}
  .title-field{display:grid;gap:6px;margin-bottom:12px}
  .title-field label{font-size:13px;color:var(--fg-dim)}
  .title-field input{width:100%;background:#111923;color:var(--fg);border:1px solid rgba(148,163,184,.2);border-radius:8px;padding:10px 12px}
  .file-import{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:10px}
  .file-import .muted{font-size:12px}
  textarea{border-radius:8px;border-color:rgba(148,163,184,.2);background:#111923}
  #input-text{min-height:220px;font-size:15px}
  .action-row{align-items:center;border-top:1px solid rgba(148,163,184,.12);padding-top:14px}
  .action-row .primary{padding-inline:20px;font-weight:800}
  .stats-chip{margin-left:auto;padding:7px 11px;border:1px solid rgba(148,163,184,.16);border-radius:999px;background:#111923;color:var(--fg-dim);font-size:12px}
  .navbar{gap:12px}
  .nav-btn{background:transparent;border-color:rgba(148,163,184,.2)}
  .progress-bar{height:7px;background:#111923;border-radius:999px}
  .progress-bar > div{border-radius:999px;background:var(--accent)}
  #view-practice{max-width:860px;margin:0 auto}
  .practice-title{margin:-4px 0 12px;padding:9px 12px;border:1px solid rgba(148,163,184,.14);border-radius:10px;background:#111923;color:var(--fg);font-size:14px;font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .qcard{padding:24px;background:rgba(21,27,36,.92);border-color:rgba(148,163,184,.2);border-radius:12px;box-shadow:var(--shadow)}
  .qcard .meta{padding-bottom:14px;border-bottom:1px solid rgba(148,163,184,.12)}
  .qcard .zh{margin:18px 0 14px;font-size:18px;color:#e7eef7}
  .qcard .en-box{min-height:72px;margin-bottom:18px;border-radius:8px;background:#101720;font-size:18px}
  .qcard .en-box.blurred{filter:blur(7px);opacity:.8;cursor:pointer}
  .controls{padding:12px;border:1px solid rgba(148,163,184,.14);border-radius:10px;background:#111923}
  #btn-play{min-width:112px;font-weight:800}
  .speed-toggle{border-color:rgba(148,163,184,.2);border-radius:9px;background:#0f151d}
  .speed-toggle button{min-height:34px}
  .user-input{min-height:130px;border-radius:8px;background:#101720;font-size:16px}
  #btn-check{margin-top:12px!important;padding:12px;font-weight:800}
  .diff-box{background:#101720;border-color:rgba(148,163,184,.18);border-radius:8px}
  .diff-summary{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:10px}
  .diff-list{margin-top:10px;display:grid;gap:6px}
  .diff-list-title{font-size:13px;color:var(--fg-dim);font-weight:700}
  .diff-list-item{display:flex;gap:8px;align-items:flex-start;padding:8px 10px;border:1px solid rgba(148,163,184,.12);border-radius:8px;background:#111923;font-size:13px;line-height:1.45}
  .diff-list-item .tag{flex-shrink:0;font-weight:700}
  .diff-list-item.bad .tag{color:#fca5a5}
  .diff-list-item.miss .tag{color:#fde68a}
  .diff-list-item code{font-family:ui-monospace,Menlo,Consolas,monospace;color:var(--fg);white-space:pre-wrap}
  .word-diff{display:flex;gap:6px;align-items:center;flex-wrap:wrap;line-height:2}
  .word-ok{color:var(--fg)}
  .word-chip{display:inline-flex;align-items:center;gap:5px;border-radius:7px;padding:3px 8px;border:1px solid rgba(148,163,184,.16);background:#111923;font-size:14px;line-height:1.45}
  .word-chip.bad{color:#fecaca;border-color:rgba(248,113,113,.3);background:rgba(239,68,68,.1)}
  .word-chip.miss{color:#fde68a;border-color:rgba(251,191,36,.32);background:rgba(251,191,36,.1)}
  .word-chip.extra{color:#bfdbfe;border-color:rgba(96,165,250,.3);background:rgba(96,165,250,.1)}
  .word-chip .label{font-size:12px;font-weight:800;opacity:.9}
  .word-chip .arrow{opacity:.65}
  .next-btn{border-radius:8px}
  .whole-text{background:#101720;border-color:rgba(148,163,184,.18);border-radius:8px}
  .recent-preview-item,.recent-item{background:#111923;border-color:rgba(148,163,184,.16)}
  .wrongbook-toolbar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:12px 0 16px}
  .history-search{display:flex;gap:8px;align-items:center;margin:10px 0 14px}
  .history-search input{flex:1;min-width:0;background:#0f151d;color:var(--fg);border:1px solid rgba(148,163,184,.22);border-radius:8px;padding:10px 12px}
  .history-search-results{margin-bottom:14px;border:1px solid rgba(148,163,184,.16);border-radius:10px;background:#101720;overflow:hidden}
  .history-tools{display:flex;gap:10px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin:0 0 12px}
  .history-filter-tabs{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
  .history-filter-tabs button,.history-sort{font-size:12px;padding:6px 10px;border-radius:8px;border:1px solid rgba(148,163,184,.18);background:#101720;color:var(--fg-dim);cursor:pointer}
  .history-filter-tabs button.active{border-color:var(--accent);color:var(--accent);background:rgba(34,211,238,.08)}
  .history-sort{min-height:32px}
  .history-batch-bar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:0 0 12px;padding:8px 10px;border:1px solid rgba(148,163,184,.16);border-radius:8px;background:#101720}
  .history-batch-bar button{font-size:12px;padding:5px 9px}
  .history-select{display:flex;align-items:center;padding-top:2px}
  .history-select input{width:16px;height:16px;accent-color:var(--accent)}
  .recent-head-top{display:flex;gap:10px;align-items:flex-start}
  .recent-title-wrap{flex:1;min-width:0}
  .recent-title-row{display:flex;gap:8px;align-items:center}
  .favorite-one{width:30px;height:30px;padding:0;border-radius:8px;border:1px solid rgba(148,163,184,.18);background:#101720;color:var(--fg-dim);cursor:pointer;flex-shrink:0}
  .favorite-one.active{border-color:#facc15;color:#facc15;background:rgba(250,204,21,.08)}
  .history-tags{display:flex;gap:6px;align-items:center;flex-wrap:wrap;margin-top:7px;min-height:21px}
  .tag-chip{display:inline-flex;align-items:center;max-width:140px;padding:2px 7px;border-radius:999px;border:1px solid rgba(148,163,184,.16);background:#0f151d;color:var(--fg-dim);font-size:11px;line-height:1.45;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .recent-progress{height:5px;background:#0f151d;border-radius:999px;overflow:hidden;margin-top:8px}
  .recent-progress span{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--good));border-radius:999px}
  .search-result{display:flex;gap:12px;align-items:flex-start;padding:12px;border-bottom:1px solid rgba(148,163,184,.1)}
  .search-result:last-child{border-bottom:0}
  .search-result-text{flex:1;min-width:0}
  .search-result-title{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:5px}
  .search-result-en{font-size:14px;line-height:1.55;color:var(--fg)}
  .search-result-zh{margin-top:3px;font-size:13px;line-height:1.5;color:var(--fg-dim)}
  .search-result mark{background:rgba(251,191,36,.24);color:#fde68a;border-radius:3px;padding:0 2px}
  .search-actions{display:flex;gap:6px;flex-shrink:0}
  .search-actions button{min-height:30px;font-size:12px;padding:4px 10px}
  .sent-btn{min-width:22px;min-height:22px;width:22px;height:22px;line-height:1;border-radius:50%}
  .sent-play{min-width:24px;min-height:24px;width:24px;height:24px;line-height:1;border-radius:50%}
  .sync-bar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:12px;padding:10px 12px;border:1px solid rgba(148,163,184,.14);border-radius:10px;background:#111923}
  .sync-bar .muted{margin-right:auto}
  .study-stats-strip{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;margin-top:14px}
  .study-stat{min-width:0;padding:10px 12px;border:1px solid rgba(148,163,184,.14);border-radius:8px;background:#101720}
  .study-stat .label{display:block;color:var(--fg-dim);font-size:12px;line-height:1.25;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .study-stat .value{display:block;margin-top:4px;color:var(--fg);font-size:18px;font-weight:800;line-height:1.15}
  .study-stat .value.good{color:var(--good)}
  .study-stat .value.bad{color:#fca5a5}
  .live-stats{display:flex;gap:7px;align-items:center;flex-wrap:wrap;margin:10px 0 12px}
  .live-stats .pill{background:#111923}
  .stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
  .stats-panel-section{margin-top:16px}
  .stats-panel-section h3{margin:0 0 10px;font-size:14px;color:var(--fg-dim)}
  .stat-bars{display:grid;gap:7px}
  .stat-bar-row{display:grid;grid-template-columns:72px 1fr 48px;gap:8px;align-items:center;font-size:12px;color:var(--fg-dim)}
  .stat-bar-track{height:8px;border-radius:999px;background:#0f151d;overflow:hidden}
  .stat-bar-fill{height:100%;border-radius:999px;background:var(--accent)}
  .stats-list{display:grid;gap:8px}
  .stats-list-item{display:flex;gap:10px;align-items:flex-start;justify-content:space-between;padding:10px 12px;border:1px solid rgba(148,163,184,.14);border-radius:8px;background:#101720}
  .stats-list-title{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--fg);font-size:13px}
  .stats-list-meta{margin-top:2px;color:var(--fg-dim);font-size:12px}
  .wrong-item{padding:12px;border:1px solid rgba(148,163,184,.16);border-radius:8px;background:#111923;margin-bottom:10px}
  .wrong-main{display:flex;gap:10px;align-items:flex-start}
  .wrong-text{flex:1;min-width:0}
  .wrong-en{font-size:15px;line-height:1.55;color:var(--fg)}
  .wrong-zh{margin-top:4px;font-size:13px;color:var(--fg-dim)}
  .wrong-meta{display:flex;gap:7px;align-items:center;flex-wrap:wrap;margin-top:8px}
  .wrong-actions{display:flex;gap:6px;flex-shrink:0}
  .wrong-actions button{font-size:12px;padding:4px 10px;min-height:30px}
  .modal-bg{background:rgba(5,8,12,.72);backdrop-filter:blur(8px);padding:18px}
  .modal{max-height:min(760px,92vh);overflow:auto;border-radius:12px;background:#151b24;box-shadow:var(--shadow)}
  .modal h2{font-size:20px}
  .modal fieldset{border-color:rgba(148,163,184,.18)!important;border-radius:10px!important;background:#111923}
  .modal legend{color:var(--fg);font-weight:700}
  .modal input,.modal select{width:100%;background:#0f151d;color:var(--fg);border:1px solid rgba(148,163,184,.22);border-radius:8px;padding:9px 10px}
  .settings-toolbar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:12px 0 14px;padding:10px;border:1px solid rgba(148,163,184,.14);border-radius:10px;background:#101720}
  .settings-toolbar .muted{flex:1 1 180px;margin:0;font-size:12px}
  .settings-section{border:1px solid rgba(148,163,184,.18);border-radius:10px;background:#111923;margin-top:12px}
  .settings-section:first-of-type{margin-top:0}
  .settings-section>summary{cursor:pointer;padding:12px 14px;color:var(--fg);font-weight:800;list-style:none}
  .settings-section>summary::-webkit-details-marker{display:none}
  .settings-section>summary::after{content:'展开';float:right;color:var(--fg-dim);font-size:12px;font-weight:600}
  .settings-section[open]>summary::after{content:'收起'}
  .settings-section-body{padding:0 12px 12px}
  .settings-section .modal-fieldset{margin:0 0 12px!important}
  .settings-section .modal-fieldset:last-child{margin-bottom:0!important}
  .ai-generate-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:14px}
  .ai-generate-grid label{margin-top:0}
  .ai-type-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:10px}
  .ai-type-option{display:flex;align-items:center;gap:8px;padding:10px;border:1px solid rgba(148,163,184,.18);border-radius:8px;background:#101720;cursor:pointer}
  .ai-type-option:has(input:checked){border-color:var(--accent);background:rgba(34,211,238,.08)}
  .ai-type-option input{width:auto!important;accent-color:var(--accent)}
  .ai-type-option span{font-size:13px;font-weight:700;color:var(--fg)}
  .ai-generate-hint{margin:10px 0 0;color:var(--fg-dim);font-size:12px;line-height:1.6}
  details.advanced{margin-top:12px;border-top:1px solid rgba(148,163,184,.12);padding-top:10px}
  details.advanced summary{cursor:pointer;color:var(--fg-dim);font-size:13px}
  .float-timer{border-radius:12px;min-width:112px;box-shadow:0 12px 30px rgba(0,0,0,.32)}
  @media (max-width: 640px){
    .wrap{padding:18px 12px 72px}
    .app-header{align-items:flex-start;flex-direction:column}
    .header-actions{width:100%;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
    .header-actions button{width:100%;min-width:0;padding:9px 6px;font-size:13px}
    h1{font-size:23px}
    .input-panel,.qcard{padding:16px}
    .mode-switch{display:flex;width:100%}
    .mode-label{flex:1;justify-content:center;padding:10px 8px}
    .action-row button{flex:1 1 calc(50% - 8px)}
    .action-row .primary{flex-basis:100%}
    .stats-chip{width:100%;margin-left:0;text-align:center}
    .sync-bar button{flex:1}
    .sync-bar .muted{width:100%;margin-right:0}
    .study-stats-strip,.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    .navbar{flex-wrap:wrap}
    .history-search{flex-direction:column;align-items:stretch}
    .history-tools{align-items:stretch}
    .history-filter-tabs{width:100%;overflow-x:auto;flex-wrap:nowrap;padding-bottom:2px}
    .history-filter-tabs button{flex-shrink:0}
    .history-sort{flex:1;min-width:150px}
    .history-batch-bar button{flex:1}
    .ai-generate-grid,.ai-type-row{grid-template-columns:1fr}
    .search-result{flex-direction:column}
    .search-actions{width:100%}
    .search-actions button{flex:1}
    .controls{display:grid;grid-template-columns:1fr 1fr;gap:8px}
    .controls .speed-toggle{grid-column:1 / -1}
    .controls .spacer{display:none}
    #btn-reveal{grid-column:1 / -1}
    .recent-preview-item,.sent-row{align-items:flex-start}
    .recent-preview-meta{display:none}
    .wrong-main{flex-direction:column}
    .wrong-actions{width:100%}
    .wrong-actions button{flex:1}
    .whole-controls{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;align-items:stretch}
    .whole-controls button{width:100%;padding:10px 8px;font-size:14px}
    .whole-controls .spacer{display:none}
    .whole-controls .speed-toggle{grid-column:2 / -1;width:100%;display:flex}
    .whole-controls .speed-toggle button{flex:1;min-width:0}
    #btn-whole-save-bank{grid-column:1 / 2}
    #whole-time{grid-column:1 / -1;font-size:13px}
    .whole-train-bar{display:grid;grid-template-columns:52px repeat(3,minmax(0,1fr));gap:8px;align-items:stretch}
    .whole-train-bar .muted{align-self:center}
    .whole-train-bar button{width:100%;padding:9px 6px;font-size:13px}
    #btn-whole-translate{grid-column:1 / -1}
    .whole-sentence-controls{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;align-items:stretch}
    .whole-sentence-controls button{width:100%;padding:10px 6px;font-size:13px}
    #btn-whole-prev{order:1}
    #btn-whole-sentence-play{order:2}
    #btn-whole-next{order:3}
    #btn-whole-sentence-slow{order:4}
    #btn-whole-loop{order:5}
    #btn-whole-shadow{order:6}
    #btn-whole-mark{order:7;grid-column:1 / -1}
    .whole-sentence-row{grid-template-columns:1fr}
    .float-timer{top:auto!important;right:12px!important;bottom:12px!important;left:auto!important}
  }