:root{
  --brand:#0B2E6B; --accent:#2D6CDF; --surface:#F5F8FF; --line:#DCE6F7;
  --good:#1E9E6A; --warn:#D98A00; --bad:#D64545; --ink:#12203A; --muted:#63718C;
  --good-bg:#E8F7F0; --warn-bg:#FFF6E5; --bad-bg:#FCEAEA;
  --radius:14px; --shadow:0 2px 10px rgba(11,46,107,.07);
}
*{box-sizing:border-box}
body{margin:0;font-family:'Inter',-apple-system,'Segoe UI',Roboto,sans-serif;
  background:var(--surface);color:var(--ink);font-size:15px;line-height:1.55}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}

/* header */
header.top{position:sticky;top:0;z-index:50;background:var(--brand);color:#fff;
  box-shadow:0 2px 14px rgba(11,46,107,.25)}
.top .wrap{max-width:1180px;margin:0 auto;padding:12px 20px;display:flex;
  align-items:center;gap:18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;color:#fff}
.brand .dot{width:26px;height:26px;border-radius:8px;background:linear-gradient(135deg,#4E8CFF,#2D6CDF);
  display:grid;place-items:center;font-size:13px}
.top nav{margin-left:auto;display:flex;align-items:center;gap:16px;font-size:14px}
.top nav a{color:#D6E4FF}
.top nav a:hover{color:#fff}
.chip{background:rgba(255,255,255,.14);padding:4px 10px;border-radius:999px;font-size:12.5px}

main{max-width:1180px;margin:0 auto;padding:26px 20px 70px}
.hero{text-align:center;padding:16px 0 26px}
.hero h1{font-size:32px;margin:0 0 8px;color:var(--brand);letter-spacing:-.4px}
.hero p{margin:0 auto;max-width:660px;color:var(--muted)}

.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow);margin-bottom:18px}
.card h2{margin:0 0 4px;font-size:17px;color:var(--brand)}
.card .sub{color:var(--muted);font-size:13.5px;margin-bottom:14px}

/* dropzone */
.drop{border:2px dashed var(--line);border-radius:var(--radius);background:#FBFCFF;
  padding:38px 20px;text-align:center;cursor:pointer;transition:.15s}
.drop:hover,.drop.over{border-color:var(--accent);background:#F0F5FF}
.drop .big{font-size:34px}
.drop b{color:var(--brand)}
.drop small{color:var(--muted);display:block;margin-top:6px}
.filename{margin-top:12px;font-size:14px;color:var(--brand);font-weight:600}

textarea,input[type=text],input[type=email],input[type=password],select{
  width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;
  font:inherit;background:#fff;color:var(--ink)}
textarea{min-height:130px;resize:vertical;font-size:13.5px}
textarea:focus,input:focus,select:focus{outline:2px solid #BFD5FF;border-color:var(--accent)}
label.fld{display:block;margin:12px 0 5px;font-size:13.5px;font-weight:600;color:var(--brand)}

.btn{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#fff;
  border:0;padding:11px 20px;border-radius:10px;font:inherit;font-weight:600;cursor:pointer;
  transition:.15s}
.btn:hover{background:#1F58C4}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn.ghost{background:#fff;color:var(--brand);border:1px solid var(--line)}
.btn.ghost:hover{background:var(--surface)}
.btn.sm{padding:7px 13px;font-size:13px}
.btn.danger{background:var(--bad)}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.sep{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:13px;margin:18px 0}
.sep:before,.sep:after{content:"";flex:1;height:1px;background:var(--line)}

/* progress */
.progress{display:none;margin-top:16px}
.progress.on{display:block}
.bar{height:9px;background:#E7EEFB;border-radius:99px;overflow:hidden}
.bar span{display:block;height:100%;width:0;background:linear-gradient(90deg,#4E8CFF,#2D6CDF);
  transition:width .35s}
.pmsg{margin-top:8px;font-size:13.5px;color:var(--muted)}

.alert{padding:12px 14px;border-radius:10px;font-size:14px;margin-bottom:14px;display:none}
.alert.on{display:block}
.alert.err{background:var(--bad-bg);color:#8E2020;border:1px solid #F2C7C7}
.alert.ok{background:var(--good-bg);color:#13664A;border:1px solid #BFE6D6}
.alert.info{background:#EAF1FF;color:#123A82;border:1px solid #C9DBFF}

/* features */
.feat{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:14px}
.feat div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:15px}
.feat h4{margin:0 0 5px;font-size:14.5px;color:var(--brand)}
.feat p{margin:0;font-size:13px;color:var(--muted)}

/* score */
.scorewrap{display:flex;align-items:center;gap:26px;flex-wrap:wrap}
.ring{width:132px;height:132px;border-radius:50%;display:grid;place-items:center;
  background:conic-gradient(var(--accent) var(--deg,0deg),#E7EEFB 0)}
.ring i{width:104px;height:104px;background:#fff;border-radius:50%;display:grid;
  place-items:center;font-style:normal;font-size:27px;font-weight:800;color:var(--brand)}
.ring i small{display:block;font-size:11px;color:var(--muted);font-weight:600}

.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;flex:1;min-width:280px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:11px;padding:11px 13px}
.stat b{display:block;font-size:21px;color:var(--brand)}
.stat span{font-size:12.2px;color:var(--muted)}
.stat.good b{color:var(--good)} .stat.warn b{color:var(--warn)} .stat.bad b{color:var(--bad)}

/* table */
table{width:100%;border-collapse:collapse;font-size:13.5px}
th{background:var(--brand);color:#fff;text-align:left;padding:10px;font-size:12.5px}
td{padding:10px;border-bottom:1px solid var(--line);vertical-align:top}
tr.bad td{background:var(--bad-bg)} tr.warn td{background:var(--warn-bg)}
tr.good td{background:#fff}
.pill{display:inline-block;padding:2px 9px;border-radius:99px;font-size:11.5px;font-weight:700}
.pill.good{background:var(--good-bg);color:var(--good)}
.pill.warn{background:var(--warn-bg);color:var(--warn)}
.pill.bad{background:var(--bad-bg);color:var(--bad)}
.tag{display:inline-block;background:#EEF3FD;border:1px solid var(--line);color:var(--muted);
  padding:1px 7px;border-radius:6px;font-size:11.5px;margin:2px 3px 0 0}
.tag.bad{background:var(--bad-bg);color:#8E2020;border-color:#F2C7C7}
.tag.warn{background:var(--warn-bg);color:#8A5A00;border-color:#F0DDB4}
.ref{font-size:13px;line-height:1.5}
.meta{color:var(--muted);font-size:12px;margin-top:4px}

.legend{display:flex;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--muted);margin-bottom:12px}
.legend b{display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:5px;vertical-align:-1px}

/* marked manuscript */
.mark{background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 14px;
  margin-bottom:10px;font-size:13.5px}
.cite{padding:1px 5px;border-radius:5px;font-weight:700}
.cite.good{background:var(--good-bg);color:var(--good)}
.cite.warn{background:var(--warn-bg);color:#8A5A00}
.cite.bad{background:var(--bad-bg);color:#8E2020}

/* bars */
.ybar{display:flex;align-items:flex-end;gap:4px;height:110px;margin-top:10px}
.ybar div{flex:1;background:linear-gradient(180deg,#5C93FF,#2D6CDF);border-radius:4px 4px 0 0;
  position:relative;min-height:3px}
.ybar div span{position:absolute;bottom:-19px;left:50%;transform:translateX(-50%) rotate(-45deg);
  font-size:10px;color:var(--muted)}
.jlist{list-style:none;padding:0;margin:8px 0 0}
.jlist li{display:flex;justify-content:space-between;padding:6px 0;border-bottom:1px solid var(--line);font-size:13.5px}

.tabs{display:flex;gap:6px;margin-bottom:14px;flex-wrap:wrap}
.tabs button{background:#fff;border:1px solid var(--line);padding:8px 15px;border-radius:9px;
  cursor:pointer;font:inherit;font-size:13.5px;color:var(--muted)}
.tabs button.on{background:var(--brand);color:#fff;border-color:var(--brand);font-weight:600}
.pane{display:none} .pane.on{display:block}

.auth{max-width:420px;margin:50px auto}
.muted{color:var(--muted);font-size:13px}
.empty{text-align:center;padding:44px 20px;color:var(--muted)}
.empty .big{font-size:40px;margin-bottom:8px}
footer{text-align:center;color:var(--muted);font-size:12.5px;padding:24px}
@media(max-width:760px){.hero h1{font-size:25px}th{position:static}}

/* ---------- quota / balance ---------- */
.chip.bal{background:rgba(255,255,255,.2);font-weight:700}
.chip.bal.low{background:#F0B542;color:#3A2A00}
.chip.bal.empty{background:#E05A5A;color:#fff}
.banner-low{background:#FFF4DE;border-bottom:1px solid #F0DDB4;color:#7A5200;
  padding:11px 20px;text-align:center;font-size:14px}
.banner-empty{background:#FDE8E8;border-bottom:1px solid #F2C7C7;color:#8E2020;
  padding:11px 20px;text-align:center;font-size:14px;border-radius:10px}
.banner-low .btn,.banner-empty .btn{margin-left:10px;vertical-align:1px}
.btn.wa{background:#25D366;color:#06331A}
.btn.wa:hover{background:#1FBA59}
.balcard{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.balbig{font-size:36px;font-weight:800;color:var(--brand);line-height:1.1}
.balbig span{font-size:14px;font-weight:600;color:var(--muted);margin-left:8px}
.balbig.low{color:var(--warn)} .balbig.empty{color:var(--bad)}

/* ---------- ghost / pending references ---------- */
tr.ghost td{background:#F3F5F9;color:#8A93A5}
tr.ghost .ref{color:#8A93A5}
.pill.ghost{background:#E3E7EE;color:#6B7688}

/* ---------- reference table: scroll container + correct sticky header ---------- */
/* the sticky header was pinned to the page (top:52px) and covered row 1 */
.card > div[style*="overflow:auto"], .tblwrap{
  max-height:70vh;
  overflow:auto !important;
  border:1px solid var(--line);
  border-radius:10px;
  scrollbar-width:thin;
  scrollbar-color:#9FB4D8 #EDF2FB;
}
.card > div[style*="overflow:auto"] table th, .tblwrap table th{
  position:sticky;
  top:0;                 /* stick to the SCROLL BOX, not the page */
  z-index:5;
  box-shadow:0 2px 0 rgba(11,46,107,.18);
}
/* always-visible chunky scrollbar */
.card > div[style*="overflow:auto"]::-webkit-scrollbar,
.tblwrap::-webkit-scrollbar{width:14px;height:14px}
.card > div[style*="overflow:auto"]::-webkit-scrollbar-track,
.tblwrap::-webkit-scrollbar-track{background:#EDF2FB;border-radius:8px}
.card > div[style*="overflow:auto"]::-webkit-scrollbar-thumb,
.tblwrap::-webkit-scrollbar-thumb{
  background:#9FB4D8;border-radius:8px;border:3px solid #EDF2FB}
.card > div[style*="overflow:auto"]::-webkit-scrollbar-thumb:hover,
.tblwrap::-webkit-scrollbar-thumb:hover{background:var(--accent)}