:root{
    --bg:#faf9f7; --panel:#ffffff; --border:#e6e4dd; --border-strong:#c9c6bc;
    --text:#1f1e1c; --muted:#6b6a66; --faint:#8f8d86;
    --accent:#3c3489; --accent-bg:#eeedfe; --accent-text:#26215c; --accent-border:#7f77dd;
    --danger:#a32d2d; --danger-bg:#faecec; --success:#3b6d11; --warn:#854f0b; --warn-bg:#faeeda;
    --radius:8px;
  }
  *{box-sizing:border-box}
  body{margin:0;font-family:"Montserrat",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
  #app{display:flex;min-height:100vh}
  #sidebar{width:280px;flex-shrink:0;background:var(--panel);border-right:1px solid var(--border);padding:1.5rem 1rem;overflow-y:auto}
  #sidebar h1{font-size:15px;font-weight:600;margin:0 0 1.25rem;padding:0 0.5rem}
  .newcloud-btn{width:100%;margin-top:8px;font-size:12px;color:var(--danger);border-color:var(--border);background:#fff}
  .file-actions{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-top:14px}
  .file-actions button{font-size:12px;padding:7px 8px}
  .newcloud-btn:hover{background:var(--danger-bg);border-color:#e2bcbc}
  .navgroup-title{font-size:11px;color:var(--faint);text-transform:uppercase;letter-spacing:.03em;padding:10px 8px 4px}
  .navitem{cursor:pointer;padding:8px 10px;border-radius:var(--radius);font-size:13px;margin-bottom:2px;color:var(--muted);display:flex;gap:8px}
  .navitem .num{color:var(--faint);min-width:20px}
  .navitem.active{background:var(--accent-bg);color:var(--accent-text);font-weight:600}
  .navitem.locked{opacity:.4;cursor:not-allowed}
  #main{flex:1;padding:2.5rem 2rem;overflow-y:auto}
  #workspace{width:100%;max-width:760px;margin:0 auto;display:grid;grid-template-columns:1fr;gap:18px;align-items:start}
  #card{width:100%;max-width:760px}
  #stickyCloud{position:static;min-width:0}
  #stickyCloud h3{font-size:13px;margin:0 0 8px;color:var(--muted)}
  #stickyCloud .box{margin-bottom:0}
  details.tip{border:1px solid var(--border);border-radius:var(--radius);background:#fff;margin-top:8px;padding:0}
  details.tip summary{cursor:pointer;font-size:12px;color:var(--muted);padding:9px 11px;list-style:none}
  details.tip summary::-webkit-details-marker{display:none}
  details.tip summary:before{content:'＋';display:inline-block;width:18px;color:var(--faint)}
  details.tip[open] summary:before{content:'−'}
  details.tip .tipbody{font-size:12px;color:var(--muted);padding:0 11px 10px}
  .choicegrid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
  .choicecard{border:1px solid var(--border);border-radius:12px;padding:12px;cursor:pointer;background:#fff}
  .choicecard.selected{border-color:var(--accent-border);background:var(--accent-bg)}
  .choicecard .t{font-weight:600;font-size:13px;margin-bottom:4px}
  .choicecard .d{font-size:12px;color:var(--muted)}
  .statusline{display:flex;gap:6px;flex-wrap:wrap;margin-top:6px}
  @media(max-width:900px){#workspace{grid-template-columns:1fr}#stickyCloud{position:static}#sidebar{display:none}#main{padding:1.25rem}.choicegrid{grid-template-columns:1fr}.cloudgrid{grid-template-columns:minmax(100px,.95fr) 18px minmax(120px,1fr) 18px minmax(120px,1fr);gap:8px 6px;padding:.9rem}.carrow{font-size:16px}}
  #content{}
  .stepnum{font-size:12px;color:var(--faint);margin-bottom:4px}
  h2{font-size:21px;font-weight:600;margin:0 0 1.1rem}
  label{display:block;font-size:13px;color:var(--muted);margin:0 0 5px;font-weight:500}
  input[type=text], textarea{
    width:100%;font:inherit;font-size:14px;padding:9px 11px;border:1px solid var(--border-strong);
    border-radius:var(--radius);background:#fff;color:var(--text);margin-bottom:0.85rem
  }
  input[type=text]:focus, textarea:focus{outline:2px solid var(--accent-border);outline-offset:-1px;border-color:var(--accent)}
  textarea{resize:vertical;min-height:70px}
  button{
    font:inherit;font-size:13px;padding:8px 14px;border-radius:var(--radius);border:1px solid var(--border-strong);
    background:#fff;color:var(--text);cursor:pointer
  }
  button:hover{background:var(--bg)}
  button.primary{background:var(--accent);color:#fff;border-color:var(--accent)}
  button.primary:hover{background:var(--accent-text)}
  button.ghost{border-color:transparent;background:transparent;color:var(--muted)}
  button:disabled{opacity:.4;cursor:not-allowed}
  button.toggled{background:var(--accent-bg);color:var(--accent-text);border-color:var(--accent-border)}
  .quote{
    font-family:inherit;font-size:16px;color:var(--text);font-weight:500;
    border-left:3px solid var(--border-strong);padding:2px 0 2px 14px;margin-bottom:1.1rem
  }
  .hint{background:var(--accent-bg);color:var(--accent-text);border-radius:var(--radius);padding:12px 14px;font-size:13px;display:flex;gap:9px;margin-top:.6rem}
  .hint svg{flex-shrink:0;margin-top:1px}
  .box{background:#fff;border:1px solid var(--border);border-radius:12px;padding:1rem 1.1rem;margin-bottom:1rem}
  .row{display:flex;gap:8px;align-items:center;margin-bottom:8px}
  .row input{flex:1;margin-bottom:0}
  .iconbtn{width:34px;height:34px;padding:0;flex-shrink:0;display:flex;align-items:center;justify-content:center;color:var(--faint)}
  .footer{display:flex;justify-content:space-between;align-items:center;margin-top:1.75rem;border-top:1px solid var(--border);padding-top:1rem}
  .blockmsg{font-size:12px;color:var(--warn)}
  .info{font-size:12px;color:var(--faint);margin:-4px 0 10px;cursor:help}
  .pathcard{border:1px solid var(--border);border-radius:12px;padding:1rem;cursor:pointer}
  .pathcard.selected{border-color:var(--accent-border);background:var(--accent-bg)}
  .pathcard .t{font-weight:600;font-size:14px;margin-bottom:5px}
  .pathcard .d{font-size:13px;color:var(--muted)}
  table{width:100%;border-collapse:collapse;font-size:13px}
  td{padding:7px 8px;border-bottom:1px solid var(--border);vertical-align:top}
  td.k{color:var(--faint);white-space:nowrap;width:70px}
  .cloudgrid{display:grid;grid-template-columns:minmax(120px,1fr) 26px minmax(180px,1.2fr) 26px minmax(180px,1.2fr);grid-template-rows:auto 24px auto;gap:10px 8px;align-items:center;background:#fff;border:1px solid var(--border);border-radius:12px;padding:1.1rem}
  .cbox{display:flex;flex-direction:column;gap:3px}
  .cbox span{font-size:11px;color:var(--faint)}
  .cbox textarea{margin-bottom:0;resize:none;overflow:hidden;min-height:38px;font-family:inherit}
  .carrow{text-align:center;font-size:18px;color:var(--faint)}
  .conflict{text-align:center;font-size:11px;color:var(--faint);writing-mode:horizontal-tb}
  .crossdiag{font-size:11px;color:var(--faint);line-height:1;text-align:center;opacity:.8;pointer-events:none}
  .crossdiag.up{grid-column:4;grid-row:3;align-self:start}
  .crossdiag.down{grid-column:4;grid-row:1;align-self:end}
  .checkline{display:flex;align-items:center;gap:7px;font-size:12px;padding:2px 0}
  .checkline.ok{color:var(--success)}
  .checkline.bad{color:var(--warn)}
  .banner{background:var(--warn-bg);color:var(--warn);border-radius:var(--radius);padding:10px 14px;font-size:13px;margin-bottom:1rem}
  .muted-small{font-size:12px;color:var(--faint)}
  .savedbox{background:var(--accent-bg);color:var(--accent-text);border-radius:var(--radius);padding:1rem;margin-top:1rem;font-size:13px}
  .lang-switch{display:flex;gap:6px;margin:14px 8px 0}.lang-switch a{flex:1;text-align:center;text-decoration:none;font-size:12px;padding:6px;border:1px solid var(--border);border-radius:7px;color:var(--muted)}.lang-switch a.active{background:var(--accent-bg);color:var(--accent-text);border-color:var(--accent-border)}
  .author-links{margin-top:10px;display:flex;flex-direction:column;gap:2px}
  .author-link{display:block;padding:7px 10px;font-size:12px;color:var(--muted);text-align:center;text-decoration:none;border-radius:var(--radius)}
  .author-link:hover{color:var(--accent);background:var(--accent-bg);text-decoration:underline}

  .mobilebar{display:none}
  .mobile-overlay{display:none}
  @media(max-width:700px){
    html,body{min-height:100%;overflow-x:hidden}
    body{font-size:16px;padding-bottom:88px}
    #app{display:block;min-height:100vh}
    .mobilebar{display:flex;position:sticky;top:0;z-index:40;align-items:center;gap:10px;padding:10px 12px;padding-top:max(10px,env(safe-area-inset-top));background:rgba(255,255,255,.96);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
    .mobilebar button{min-width:44px;height:44px;padding:0 12px;font-size:18px}
    .mobilebar-title{min-width:0;flex:1;font-size:15px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .mobilebar-step{font-size:12px;color:var(--muted);white-space:nowrap}
    #sidebar{display:block;position:fixed;z-index:60;inset:0 auto 0 0;width:min(88vw,340px);padding-top:max(20px,env(safe-area-inset-top));transform:translateX(-105%);transition:transform .22s ease;box-shadow:0 0 36px rgba(0,0,0,.16)}
    #sidebar.mobile-open{transform:translateX(0)}
    .mobile-overlay{position:fixed;z-index:55;inset:0;background:rgba(20,20,20,.35)}
    .mobile-overlay.show{display:block}
    #main{padding:18px 14px 24px;overflow:visible}
    #workspace,#card{max-width:none;width:100%}
    h2{font-size:24px;line-height:1.22;margin-bottom:16px}
    .stepnum{font-size:13px}
    input[type=text],textarea,select{font-size:16px!important;min-height:46px;padding:11px 12px;border-radius:10px}
    textarea{min-height:96px}
    button{min-height:44px;font-size:15px;padding:10px 14px;touch-action:manipulation}
    .row{align-items:stretch;gap:8px}
    .row input{min-width:0}
    .iconbtn{width:44px;height:46px}
    .choicegrid{grid-template-columns:1fr}
    .choicecard,.pathcard,.box{padding:14px;border-radius:14px}
    .choicecard .t,.pathcard .t{font-size:16px}
    .choicecard .d,.pathcard .d{font-size:14px}
    .quote{font-size:17px;line-height:1.5;padding-left:12px}
    .hint{font-size:14px;padding:13px 14px}
    details.tip summary{font-size:14px;min-height:44px;display:flex;align-items:center}
    details.tip .tipbody{font-size:14px;padding:0 13px 13px}
    .statusline{display:grid;grid-template-columns:1fr 1fr;gap:8px}
    .statusline button{width:100%;white-space:normal}
    .cloudgrid{display:flex!important;flex-direction:column;gap:9px;padding:12px;overflow:visible}
    .cloudgrid .cbox{display:flex!important;width:100%;grid-column:auto!important;grid-row:auto!important}
    .cloudgrid .carrow,.cloudgrid .crossdiag,.cloudgrid .conflict{display:none!important}
    .cloudgrid .cbox textarea{min-height:48px;font-size:15px!important}
    #stickyCloud .box{padding:12px}
    table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch;font-size:14px}
    td{min-width:180px;padding:10px 8px}
    .footer{position:fixed;z-index:45;left:0;right:0;bottom:0;margin:0;padding:10px 12px;padding-bottom:max(10px,env(safe-area-inset-bottom));background:rgba(255,255,255,.97);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-top:1px solid var(--border);display:grid;grid-template-columns:auto 1fr auto;gap:8px;align-items:center}
    .footer button{min-width:96px}
    .footer .blockmsg{font-size:11px;line-height:1.2;text-align:center;max-height:32px;overflow:hidden}
    .file-actions{grid-template-columns:1fr}
    .file-actions button,.newcloud-btn{font-size:14px}
    .navitem{font-size:15px;padding:10px 12px}
    .navgroup-title{font-size:12px}
    .author-link{font-size:13px}
  }
  @media(max-width:390px){
    #main{padding-left:10px;padding-right:10px}
    .statusline{grid-template-columns:1fr}
    .footer{grid-template-columns:88px 1fr 96px;padding-left:8px;padding-right:8px}
    .footer button{min-width:0;padding-left:8px;padding-right:8px;font-size:14px}
  }