:root{
    --bg:#FAF7F1; --card:#FFFFFF; --ink:#2B2B2B; --muted:#6B655C; --line:#E6E0D6;
    --accent:#B5493A; --accent-soft:#F7E9E6; --ok:#2E7D5B; --ok-soft:#E4F2EB;
    --warn:#B7791F; --warn-soft:#FBF1DC; --soft:#F3EFE8;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  [hidden]{display:none!important}
  html,body{background:var(--bg);color:var(--ink);font-family:'Noto Sans TC','Microsoft JhengHei',sans-serif;font-size:15px;line-height:1.6}
  a{color:inherit;text-decoration:none}
  button{font:inherit;cursor:pointer}

  /* ---- 頂欄 ---- */
  .top{position:sticky;top:0;z-index:20;background:var(--ink);color:#fff;height:54px;display:flex;align-items:center;padding:0 16px;gap:14px}
  .top .brand{font-family:'Noto Serif TC',serif;font-weight:900;letter-spacing:1px;font-size:16px}
  .top .brand small{font-family:'Noto Sans TC';font-weight:400;opacity:.65;font-size:12px;margin-left:8px;letter-spacing:2px}
  .top .sp{flex:1}
  .role{display:flex;background:rgba(255,255,255,.1);border-radius:20px;padding:3px;gap:2px}
  .role button{border:0;background:transparent;color:rgba(255,255,255,.7);padding:4px 12px;border-radius:16px;font-size:13px}
  .role button.on{background:var(--accent);color:#fff}
  .me{font-size:13px;opacity:.85;white-space:nowrap}
  .me b{font-weight:600}

  /* ---- 版面 ---- */
  .wrap{display:grid;grid-template-columns:200px 1fr;min-height:calc(100vh - 54px)}
  .side{background:#fff;border-right:1px solid var(--line);padding:18px 12px}
  .side .grp{font-size:11px;letter-spacing:2px;color:var(--muted);margin:14px 10px 6px}
  .nav button{display:flex;align-items:center;gap:10px;width:100%;border:0;background:transparent;text-align:left;padding:9px 10px;border-radius:8px;color:var(--ink);font-size:14px}
  .nav button svg{width:18px;height:18px;flex:none;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
  .nav button.on{background:var(--accent-soft);color:var(--accent);font-weight:600}
  .nav button .n{margin-left:auto;background:var(--accent);color:#fff;font-size:11px;padding:0 7px;border-radius:9px;line-height:18px}
  main{padding:22px 26px 90px;max-width:960px}
  .view{display:none}.view.on{display:block}
  h1{font-family:'Noto Serif TC',serif;font-size:24px;font-weight:900;margin-bottom:4px}
  .sub{color:var(--muted);font-size:13px;margin-bottom:18px}
  h2{font-size:15px;font-weight:700;margin:0 0 10px;display:flex;align-items:center;gap:8px}
  h2 .tag{font-size:11px;font-weight:500;background:var(--soft);color:var(--muted);padding:1px 8px;border-radius:10px}
  .card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px 18px;margin-bottom:14px}
  .grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
  .grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
  .muted{color:var(--muted)}
  .small{font-size:12.5px}
  .row{display:flex;align-items:center;gap:10px}
  .btn{border:1px solid var(--line);background:#fff;padding:7px 14px;border-radius:9px;font-size:13.5px}
  .btn.pri{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}
  .btn.sm{padding:4px 10px;font-size:12.5px}
  .pill{display:inline-block;font-size:11.5px;padding:1px 9px;border-radius:10px;background:var(--soft);color:var(--muted);font-weight:500}
  .pill.ok{background:var(--ok-soft);color:var(--ok)}
  .pill.warn{background:var(--warn-soft);color:var(--warn)}
  .pill.acc{background:var(--accent-soft);color:var(--accent)}
  .kpi{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:14px}
  .kpi .k{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 14px}
  .kpi .k .v{font-family:'Inter',sans-serif;font-size:26px;font-weight:700;line-height:1.1}
  .kpi .k .l{font-size:12px;color:var(--muted);margin-top:4px}
  .kpi .k .d{font-size:11.5px;color:var(--ok);margin-top:2px}

  /* 下一場 */
  .next{background:var(--ink);color:#fff;border-radius:14px;padding:18px 20px;display:grid;grid-template-columns:auto 1fr auto;gap:18px;align-items:center;margin-bottom:14px}
  .next .date{text-align:center;border-right:1px solid rgba(255,255,255,.2);padding-right:18px}
  .next .date .m{font-size:11px;letter-spacing:2px;opacity:.7}
  .next .date .d{font-family:'Inter',sans-serif;font-size:36px;font-weight:700;line-height:1}
  .next .t{font-family:'Noto Serif TC',serif;font-size:18px;font-weight:700}
  .next .meta{font-size:13px;opacity:.8;margin-top:2px}
  .next .bring{font-size:12.5px;margin-top:8px;padding-top:8px;border-top:1px dashed rgba(255,255,255,.25)}
  .next .bring b{color:#F3C9C2}
  .next .cnt{text-align:center}
  .next .cnt .v{font-family:'Inter';font-size:30px;font-weight:700;color:#F3C9C2;line-height:1}
  .next .cnt .l{font-size:11px;opacity:.7}

  /* 時程 */
  .tl{list-style:none}
  .tl li{display:grid;grid-template-columns:70px 1fr auto;gap:12px;padding:9px 0;border-bottom:1px solid var(--line);align-items:center;font-size:13.5px}
  .tl li:last-child{border:0}
  .tl .dt{font-family:'Inter';font-weight:600;color:var(--muted)}
  .tl li.done .dt,.tl li.done .nm{color:#A39C90;text-decoration:line-through}
  .tl .stage{font-size:11px;letter-spacing:1px;color:var(--accent);font-weight:600}
  .tl .ws .nm{font-weight:700}

  /* 里程碑 */
  .ms{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative;margin:8px 0 6px}
  .ms::before{content:'';position:absolute;left:12%;right:12%;top:15px;height:2px;background:var(--line)}
  .ms .s{text-align:center;position:relative}
  .ms .s .c{width:30px;height:30px;border-radius:50%;border:2px solid var(--line);background:#fff;margin:0 auto 6px;display:flex;align-items:center;justify-content:center;font-family:'Inter';font-size:12px;font-weight:700;color:var(--muted)}
  .ms .s.done .c{background:var(--ok);border-color:var(--ok);color:#fff}
  .ms .s.now .c{border-color:var(--accent);color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
  .ms .s .l{font-size:12.5px;font-weight:600}
  .ms .s .d{font-size:11px;color:var(--muted)}

  /* 表單 */
  .step{border-left:3px solid var(--accent);padding:2px 0 2px 14px;margin:16px 0 8px}
  .step h3{font-size:15px;font-weight:700}
  .step p{font-size:12.5px;color:var(--muted)}
  .fld{margin:10px 0}
  .fld label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:4px}
  .fld .in{border:1px solid var(--line);background:#FFFDF8;border-radius:9px;padding:9px 12px;font-size:14px;min-height:40px;white-space:pre-wrap}
  .fld .in.empty{color:#B8B0A4;font-style:normal}
  table{width:100%;border-collapse:collapse;font-size:13.5px}
  th,td{padding:8px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
  th{font-size:12px;color:var(--muted);font-weight:600;letter-spacing:.5px}
  tr:last-child td{border:0}
  .save{position:sticky;bottom:14px;display:flex;justify-content:flex-end;gap:10px;margin-top:10px}
  .autosave{font-size:12px;color:var(--ok);align-self:center}

  /* 繳交 */
  .sub-item{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;padding:10px 0;border-bottom:1px solid var(--line)}
  .sub-item:last-child{border:0}
  .sub-item .ic{width:34px;height:34px;border-radius:9px;display:flex;align-items:center;justify-content:center;font-size:16px}
  .sub-item .ic.ok{background:var(--ok-soft)}.sub-item .ic.todo{background:var(--warn-soft)}.sub-item .ic.lock{background:var(--soft)}
  .sub-item .nm{font-weight:600;font-size:14px}
  .sub-item .meta{font-size:12px;color:var(--muted)}

  /* 回饋 */
  .fb{padding:12px 0;border-bottom:1px solid var(--line)}
  .fb:last-child{border:0}
  .fb .who{font-size:12.5px;color:var(--muted);display:flex;gap:8px;align-items:center}
  .fb .who b{color:var(--ink)}
  .fb .txt{margin-top:4px;font-size:14px}
  .ava{width:26px;height:26px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-weight:700}
  .ava.t{background:#E4EAF2;color:#3B5B84}

  /* 組員 */
  .person{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--line)}
  .person:last-child{border:0}
  .person .nm{font-weight:600}
  .person .r{font-size:12px;color:var(--muted)}
  .bar{height:6px;background:var(--soft);border-radius:3px;overflow:hidden;width:120px}
  .bar i{display:block;height:100%;background:var(--ok)}

  /* 老師端學員表 */
  .stu td .bar{width:100px}
  .care{display:grid;grid-template-columns:1fr 1fr;gap:4px 18px;font-size:13px}
  .care label{display:flex;gap:8px;align-items:flex-start;padding:4px 0}
  .care input{margin-top:4px;accent-color:var(--ok)}
  textarea.in{width:100%;border:1px solid var(--line);border-radius:9px;padding:10px 12px;font:inherit;font-size:14px;min-height:80px;background:#FFFDF8;resize:vertical}

  /* 看板 */
  .heat{display:grid;grid-template-columns:110px repeat(4,1fr);gap:6px;font-size:12.5px;align-items:center}
  .heat .h{font-size:11px;color:var(--muted);text-align:center}
  .heat .nm{font-weight:600}
  .heat .cell{height:26px;border-radius:6px;background:var(--soft);display:flex;align-items:center;justify-content:center;font-size:11px;color:var(--muted)}
  .heat .cell.ok{background:var(--ok);color:#fff}
  .heat .cell.now{background:var(--accent-soft);color:var(--accent);font-weight:600}
  .heat .cell.late{background:var(--warn-soft);color:var(--warn);font-weight:600}
  .stat{display:grid;grid-template-columns:1fr auto;gap:8px 14px;font-size:13.5px;align-items:center}
  .stat .b{height:8px;background:var(--soft);border-radius:4px;overflow:hidden}
  .stat .b i{display:block;height:100%;background:var(--accent)}
  .stat .v{font-family:'Inter';font-weight:600;min-width:60px;text-align:right}
  .att td{text-align:center}
  .att td:first-child,.att th:first-child{text-align:left}
  .att .v{display:inline-block;width:24px;height:24px;line-height:24px;border-radius:6px;font-size:12px;font-weight:600}
  .att .v.p{background:var(--ok-soft);color:var(--ok)}.att .v.o{background:#E4EAF2;color:#3B5B84}.att .v.x{background:var(--accent-soft);color:var(--accent)}.att .v.e{background:var(--soft);color:#B8B0A4}
  .note{font-size:12px;color:var(--muted);margin-top:8px}

  
  @media (max-width:760px){
    .wrap{grid-template-columns:1fr}
    .side{position:fixed;left:0;right:0;bottom:0;border-right:0;border-top:1px solid var(--line);padding:6px 8px;z-index:20}
    .side .grp{display:none}
    .nav{display:flex;justify-content:space-around}
    .nav button{flex-direction:column;gap:2px;font-size:10.5px;padding:4px 6px;width:auto}
    .nav button .n{position:absolute;margin:0;transform:translate(14px,-6px)}
    .nav button{position:relative}
    main{padding:16px 14px 90px}
    body{overflow-x:hidden}
    main{max-width:none;overflow-x:hidden}
    .card,.k{min-width:0}
    .grid2,.grid3{grid-template-columns:1fr}
    .kpi{grid-template-columns:1fr 1fr}
    .tl li{grid-template-columns:52px 1fr;row-gap:2px}
    .tl li .pill{grid-column:2;justify-self:start}
    .next .t{font-size:16px}
    .ms .s .l{font-size:11.5px}
    .heat{grid-template-columns:64px repeat(4,1fr)}
    .next{grid-template-columns:auto 1fr}
    .next .cnt{display:none}
    .top .brand small{display:none}
    .me{display:none}
  }

  /* ---- 登入 ---- */
  .login{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;
    background:#16324F;
    background-image:radial-gradient(900px 500px at 15% 10%, rgba(59,133,164,.45), transparent 60%),
                     radial-gradient(700px 500px at 90% 90%, rgba(46,125,91,.35), transparent 60%)}
  .login-box{width:100%;max-width:400px;background:#fff;border-radius:20px;padding:34px 30px;box-shadow:0 24px 60px rgba(0,0,0,.35)}
  .login-kicker{font-size:12px;letter-spacing:3px;color:#3B85A4;font-weight:600;margin-bottom:10px}
  .login-title{font-family:'Noto Serif TC',serif;font-size:30px;font-weight:900;line-height:1.3;margin-bottom:22px;color:#16324F}
  .login .fld span{display:block;font-size:12.5px;color:#5B6B7A;margin-bottom:6px}
  .login input{width:100%;border:1.5px solid #D6DEE6;border-radius:10px;padding:12px 14px;font:inherit;font-size:17px;letter-spacing:1px;background:#F7FAFC;color:#16324F}
  .login input:focus{outline:2px solid #3B85A4;border-color:transparent}
  .login .btn.pri{background:#2E7D5B;border-color:#2E7D5B}
  .btn.wide{width:100%;padding:12px;font-size:16px;margin-top:14px}
  .btn.ghost{background:transparent;border-color:rgba(255,255,255,.3);color:#fff}
  .login-err{color:#B5493A;font-size:13px;min-height:20px;margin-top:8px}
  .login-note{font-size:12px;color:#7A8894;margin-top:14px;text-align:center}
  .toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:var(--ink);color:#fff;padding:9px 16px;border-radius:20px;font-size:13px;z-index:50;box-shadow:0 6px 20px rgba(0,0,0,.2)}
  /* ---- 可編輯欄位 ---- */
  input.in,select.in{width:100%;border:1px solid var(--line);border-radius:9px;padding:9px 12px;font:inherit;font-size:14px;background:#FFFDF8}
  textarea.in{min-height:64px}
  .in:focus{outline:2px solid var(--accent);border-color:transparent}
  table.edit td{padding:4px 6px}
  table.edit input{padding:6px 8px;font-size:13px}
  .chk{display:flex;align-items:center;gap:8px;font-size:14px}
  .chk input{width:18px;height:18px;accent-color:var(--ok)}
  .ms .s{cursor:pointer}
  .empty{color:#B8B0A4;font-size:13.5px;padding:8px 0}
  .link{color:var(--accent);text-decoration:underline;word-break:break-all;font-size:13px}
  .att select{font-size:12px;padding:3px 4px;border:1px solid var(--line);border-radius:6px;background:#fff}
  .att td{padding:5px 4px}
  .stat .b i{transition:width .3s}
  .role button{cursor:pointer}
  @media (max-width:760px){ .top .btn.ghost{display:none} }