:root{
  --bg:#faf9f7; --card:#ffffff; --ink:#1f1e1c; --ink-2:#6b6862;
  --line:#e6e3dd; --accent:#2f6f4f; --accent-2:#245a40;
  --danger:#b3261e; --warn:#9a6b12; --radius:12px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",
    "Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:15px; line-height:1.6; -webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1040px;margin:0 auto;padding:24px 20px 64px}
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:14px 20px;background:var(--card);
  border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:650;font-size:16px}
.brand .dot{width:9px;height:9px;border-radius:50%;background:var(--accent)}
.topbar .right{display:flex;align-items:center;gap:14px;font-size:13.5px;color:var(--ink-2)}
h1{font-size:22px;margin:0 0 6px}
h2{font-size:18px;margin:0 0 12px}
.sub{color:var(--ink-2);font-size:13.5px;margin:0 0 22px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 24px;margin-bottom:20px;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  border:1px solid var(--accent);background:var(--accent);color:#fff;
  padding:8px 16px;border-radius:8px;font-size:14px;cursor:pointer;
  font-family:inherit;line-height:1.4;transition:.15s;
}
.btn:hover{background:var(--accent-2);border-color:var(--accent-2);text-decoration:none}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.ghost:hover{background:#f3f1ed;text-decoration:none}
.btn.danger{background:var(--danger);border-color:var(--danger)}
.btn.danger:hover{background:#8f1e17;border-color:#8f1e17}
.btn.sm{padding:5px 11px;font-size:13px}
.btn:disabled{opacity:.5;cursor:not-allowed}
input[type=text],input[type=password]{
  width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;
  font-size:15px;font-family:inherit;background:#fff;color:var(--ink);
}
input:focus{outline:2px solid rgba(47,111,79,.25);border-color:var(--accent)}
label{display:block;font-size:13.5px;color:var(--ink-2);margin:14px 0 6px}
table{width:100%;border-collapse:collapse}
th,td{padding:11px 10px;text-align:left;border-bottom:1px solid var(--line);font-size:14px}
th{color:var(--ink-2);font-weight:600;font-size:12.5px;letter-spacing:.3px}
tbody tr:hover{background:#fbfaf8}
td.name{font-weight:520}
td.act{text-align:right;white-space:nowrap}
.empty{color:var(--ink-2);text-align:center;padding:48px 20px;font-size:14px}
.err{
  background:#fdecea;border:1px solid #f5c6c2;color:var(--danger);
  padding:10px 14px;border-radius:8px;font-size:13.5px;margin-bottom:14px;
}
.ok{
  background:#eaf5ee;border:1px solid #bfe0cb;color:var(--accent-2);
  padding:10px 14px;border-radius:8px;font-size:13.5px;margin-bottom:14px;
}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.spacer{flex:1}
.tag{
  display:inline-block;padding:2px 8px;border-radius:20px;font-size:11.5px;
  background:#eef2ef;color:var(--accent-2);border:1px solid #d8e5dd;
}
.tag.excel{background:#eaf2ec;color:#2f6f4f;border-color:#cfe3d6}
.tag.pptx{background:#fdf0ea;color:#a8542a;border-color:#f3d6c6}
.login-wrap{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  padding:24px;background:linear-gradient(160deg,#faf9f7,#f2f5f2);
}
.login-box{width:100%;max-width:380px}
.login-box .card{padding:28px 26px}
.login-title{font-size:20px;font-weight:650;margin:0 0 4px}
.login-sub{color:var(--ink-2);font-size:13.5px;margin:0 0 20px}
.editor-shell{position:fixed;inset:0;top:50px;background:#fff}
.editor-bar{
  height:50px;display:flex;align-items:center;gap:12px;padding:0 16px;
  background:var(--card);border-bottom:1px solid var(--line);
  position:fixed;top:0;left:0;right:0;z-index:30;
}
.editor-bar .fname{font-weight:600;font-size:14.5px;overflow:hidden;
  text-overflow:ellipsis;white-space:nowrap;max-width:44vw}
#placeholder{width:100%;height:100%}
.loading{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  height:100%;gap:14px;color:var(--ink-2);font-size:14px;
}
.spinner{
  width:30px;height:30px;border:3px solid var(--line);
  border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}
footer{
  margin-top:36px;padding-top:18px;border-top:1px solid var(--line);
  text-align:center;font-size:12.5px;color:var(--ink-2);line-height:2;
}
footer a{color:var(--ink-2);border-bottom:1px solid transparent}
footer a:hover{color:var(--ink);text-decoration:none;border-bottom-color:#c9c8c2}
.modal-mask{
  position:fixed;inset:0;background:rgba(20,20,18,.42);z-index:50;
  display:flex;align-items:center;justify-content:center;padding:20px;
}
.modal{
  background:var(--card);border-radius:var(--radius);padding:22px 24px;
  width:100%;max-width:400px;
}
.modal h3{margin:0 0 14px;font-size:17px}
.modal .row{margin-top:18px;justify-content:flex-end}
.hint{font-size:12.5px;color:var(--ink-2);margin-top:8px}
@media(max-width:640px){
  .wrap{padding:18px 14px 48px}
  .card{padding:18px 16px}
  .editor-bar .fname{max-width:38vw}
  th:nth-child(4),td:nth-child(4){display:none}
}