:root{
    --bg:#EFEDE6;
    --surface:#FFFFFF;
    --ink:#2B2B28;
    --muted:#8A8678;
    --accent:#3D6B5C;
    --accent-soft:#DCE6E1;
    --line:#DAD6CB;
    --warn:#B5654A;
  }
  *{box-sizing:border-box;}
  html,body{margin:0;padding:0;}
  body{
    background:var(--bg);
    color:var(--ink);
    font-family:'Inter',system-ui,-apple-system,sans-serif;
    -webkit-font-smoothing:antialiased;
    min-height:100vh;
  }
  .app{
    max-width:560px;
    margin:0 auto;
    min-height:100vh;
    background:var(--bg);
    display:flex;
    flex-direction:column;
  }
  header{
    padding:20px 18px 14px;
    border-bottom:1px solid var(--line);
    background:var(--bg);
    position:sticky;
    top:0;
    z-index:5;
  }
  header h1{
    font-family:'Source Serif 4',Georgia,serif;
    font-weight:600;
    font-size:21px;
    margin:0 0 2px;
    letter-spacing:0.2px;
  }
  header p.sub{
    margin:0;
    font-size:12.5px;
    color:var(--muted);
    font-family:'IBM Plex Mono',monospace;
  }
  .tabs{display:flex;gap:6px;margin-top:14px;}
  .tab{
    flex:1;text-align:center;padding:8px 0;font-size:13px;font-weight:500;
    border-radius:8px;cursor:pointer;color:var(--muted);background:transparent;
    border:1px solid transparent;transition:all .15s ease;
  }
  .tab.active{background:var(--surface);color:var(--ink);border-color:var(--line);}
  .signout{
    font-size:11px;color:var(--muted);font-family:'IBM Plex Mono',monospace;
    text-align:right;margin-top:8px;cursor:pointer;text-decoration:underline;
  }

  /* ---- Auth screen ---- */
  .auth-wrap{
    flex:1;display:flex;align-items:center;justify-content:center;padding:24px;
  }
  .auth-box{
    width:100%;max-width:340px;background:var(--surface);
    border:1px solid var(--line);border-radius:14px;padding:28px 24px;
  }
  .auth-box h2{
    font-family:'Source Serif 4',serif;font-size:19px;margin:0 0 4px;
  }
  .auth-box p{font-size:12.5px;color:var(--muted);margin:0 0 18px;line-height:1.6;}
  .auth-box input{
    width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:8px;
    font-size:14px;margin-bottom:10px;font-family:'Inter',sans-serif;
    background:var(--bg);color:var(--ink);outline:none;
  }
  .auth-box input:focus{border-color:var(--accent);}
  .auth-box button{
    width:100%;background:var(--accent);color:#fff;border:none;border-radius:8px;
    padding:11px 0;font-size:14px;font-weight:500;cursor:pointer;margin-top:4px;
  }
  .auth-box button:disabled{opacity:.5;}
  .auth-toggle{
    text-align:center;font-size:12.5px;color:var(--muted);margin-top:14px;cursor:pointer;
  }
  .auth-toggle span{color:var(--accent);text-decoration:underline;}
  .auth-error{color:var(--warn);font-size:12px;margin-top:8px;line-height:1.5;}

  /* ---- Composer ---- */
  .composer{padding:14px 18px;border-bottom:1px solid var(--line);background:var(--bg);}
  .composer textarea{
    width:100%;min-height:54px;max-height:160px;resize:none;border:1px solid var(--line);
    border-radius:10px;padding:11px 13px;font-family:'Inter',sans-serif;font-size:14.5px;
    background:var(--surface);color:var(--ink);outline:none;
  }
  .composer textarea:focus{border-color:var(--accent);}
  .composer-row{display:flex;justify-content:flex-end;margin-top:8px;}
  .img-thumb{position:relative;width:64px;height:64px;border-radius:8px;overflow:hidden;border:1px solid var(--line);}
  .img-thumb img{width:100%;height:100%;object-fit:cover;display:block;}
  .img-thumb .img-remove{
    position:absolute;top:2px;right:2px;width:18px;height:18px;border-radius:50%;
    background:rgba(0,0,0,.6);color:#fff;font-size:11px;display:flex;align-items:center;justify-content:center;
    cursor:pointer;line-height:1;
  }
  .entry-images{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px;}
  .entry-images img{
    width:76px;height:76px;object-fit:cover;border-radius:8px;border:1px solid var(--line);cursor:pointer;
  }
  .img-lightbox{
    position:fixed;inset:0;background:rgba(0,0,0,.85);display:flex;align-items:center;justify-content:center;
    z-index:50;padding:20px;
  }
  .img-lightbox img{max-width:100%;max-height:100%;border-radius:8px;}
  .upcoming-banner{
    margin:14px 18px 0;padding:12px 14px;background:var(--surface);border:1px solid var(--accent);
    border-radius:10px;
  }
  .upcoming-banner h3{font-size:12.5px;color:var(--accent);margin-bottom:6px;letter-spacing:.03em;}
  .upcoming-banner ul{list-style:none;padding:0;margin:0;}
  .upcoming-banner li{font-size:13px;color:var(--ink);padding:4px 0;border-top:1px dashed var(--line);}
  .upcoming-banner li:first-child{border-top:none;}
  .changelog-section{margin:18px;}
  .changelog-section h2{font-size:14px;margin-bottom:10px;color:var(--ink);}
  .changelog-item{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-bottom:10px;}
  .changelog-item .cl-head{display:flex;justify-content:space-between;align-items:flex-start;gap:8px;margin-bottom:6px;}
  .changelog-item .cl-version{font-size:11px;color:var(--muted);font-family:'IBM Plex Mono',monospace;}
  .changelog-item .cl-title{font-size:14px;font-weight:600;color:var(--ink);}
  .changelog-item .cl-desc{font-size:13px;color:var(--ink);line-height:1.7;white-space:pre-wrap;}
  .changelog-item .cl-date{font-size:11px;color:var(--muted);margin-top:6px;}
  .changelog-item .cl-actions{display:flex;gap:6px;flex-shrink:0;}
  .cl-form{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin:18px;}
  .cl-form input, .cl-form textarea, .cl-form select{
    width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:8px;font-size:13.5px;
    font-family:'Inter',sans-serif;background:var(--bg);color:var(--ink);outline:none;margin-bottom:8px;
  }
  .cl-form textarea{resize:vertical;min-height:60px;}
  .cl-form-row{display:flex;gap:8px;}
  .cl-form-row > *{flex:1;}
  button.primary{
    background:var(--accent);color:#fff;border:none;border-radius:8px;padding:9px 16px;
    font-size:13.5px;font-weight:500;cursor:pointer;font-family:'Inter',sans-serif;
  }
  button.primary:disabled{opacity:.45;cursor:default;}
  button.primary:active{transform:scale(0.98);}

  main{flex:1;overflow-y:auto;padding:6px 0 40px;}
  .day-group{padding:18px 18px 4px;}
  .day-label{font-family:'IBM Plex Mono',monospace;font-size:11.5px;color:var(--muted);margin-bottom:10px;letter-spacing:0.5px;}
  .spine{position:relative;padding-left:18px;}
  .spine::before{content:'';position:absolute;left:4px;top:6px;bottom:6px;width:1px;background:var(--line);}
  .entry{position:relative;padding-bottom:16px;}
  .entry::before{content:'';position:absolute;left:-18px;top:5px;width:7px;height:7px;border-radius:50%;background:var(--accent);}
  .entry-time{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--muted);margin-bottom:3px;display:flex;justify-content:space-between;align-items:center;}
  .entry-delete{
    font-size:11px;color:var(--muted);cursor:pointer;opacity:0;transition:opacity .15s ease;
    padding:2px 6px;border-radius:4px;
  }
  .entry:hover .entry-delete{opacity:1;}
  .entry-delete:hover{color:var(--warn);background:var(--accent-soft);}
  .entry-text{font-size:14.5px;line-height:1.55;white-space:pre-wrap;word-break:break-word;}
  .reply-list{margin-top:8px;padding-left:12px;border-left:2px solid var(--accent-soft);}
  .reply-item{margin-bottom:6px;}
  .reply-meta{display:flex;justify-content:space-between;align-items:center;font-size:10.5px;color:var(--muted);font-family:'IBM Plex Mono',monospace;}
  .reply-text{font-size:13px;line-height:1.5;white-space:pre-wrap;word-break:break-word;}
  .reply-input-row{display:flex;gap:6px;margin-top:8px;}
  .reply-toggle{
    font-size:11px;color:var(--accent);cursor:pointer;margin-top:6px;font-family:'IBM Plex Mono',monospace;
    display:inline-block;
  }
  .reply-input{
    flex:1;padding:6px 10px;border:1px solid var(--line);border-radius:7px;
    font-size:12.5px;font-family:'Inter',sans-serif;background:var(--surface);
    color:var(--ink);outline:none;
  }
  .reply-input:focus{border-color:var(--accent);}
  .reply-send{
    font-size:12px;color:#fff;background:var(--accent);border:none;border-radius:7px;
    padding:6px 12px;cursor:pointer;font-family:'Inter',sans-serif;
  }
  .empty{padding:60px 24px;text-align:center;color:var(--muted);font-size:13.5px;line-height:1.7;}

  .diary-day{margin:18px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px 17px;}
  .diary-day .diary-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;}
  .copy-btn{font-size:11px;color:var(--accent);cursor:pointer;font-family:'IBM Plex Mono',monospace;border:1px solid var(--accent-soft);border-radius:6px;padding:3px 8px;background:transparent;}
  .copy-btn:hover{background:var(--accent-soft);}
  .diary-date{font-family:'IBM Plex Mono',monospace;font-size:11.5px;color:var(--muted);margin-bottom:8px;}
  .diary-text{font-family:'Source Serif 4',Georgia,serif;font-size:15.5px;line-height:1.85;white-space:pre-wrap;margin-bottom:12px;}
  .tags{display:flex;flex-wrap:wrap;gap:6px;}
  .tag{font-size:11px;font-family:'IBM Plex Mono',monospace;background:var(--accent-soft);color:var(--accent);padding:3px 8px;border-radius:6px;}
  .gen-bar{margin:18px;display:flex;gap:8px;}
  .gen-bar button{flex:1;}
  .stat-panel{margin:18px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 17px;}
  .stat-panel h2{font-size:12px;font-family:'IBM Plex Mono',monospace;color:var(--muted);margin:0 0 10px;letter-spacing:0.3px;}
  .stat-row{display:flex;align-items:center;gap:8px;margin-bottom:6px;font-size:12.5px;}
  .stat-row .label{width:170px;flex-shrink:0;color:var(--ink);}
  .stat-row .bar-bg{flex:1;height:8px;background:var(--accent-soft);border-radius:4px;overflow:hidden;}
  .stat-row .bar-fill{height:100%;background:var(--accent);}
  .stat-row .count{width:20px;text-align:right;color:var(--muted);font-family:'IBM Plex Mono',monospace;}
  .loading{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:13px;padding:4px 2px;}
  .spinner{width:13px;height:13px;border:2px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite;}
  @keyframes spin{to{transform:rotate(360deg);}}
  .error-msg{color:var(--warn);font-size:12.5px;padding:8px 2px 0;}
  .sync-status{font-size:11px;color:var(--muted);font-family:'IBM Plex Mono',monospace;padding:0 18px 6px;}