:root{
  --ground:#f6f8fa; --surface:#fff; --surface-2:#eef2f6; --ink:#14202b;
  --muted:#566675; --faint:#8492a0; --hairline:#dbe2e9;
  --accent:#16707d; --accent-ink:#0c4a53;
  --ok:#1f7a54; --ok-bg:#e2f1e8; --bad:#b3261e; --bad-bg:#fbe6e4;
  --warn:#8a6d1f; --warn-bg:#f6eecf;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --ground:#0d151d; --surface:#131e29; --surface-2:#18242f; --ink:#e2e9f0;
  --muted:#93a3b2; --faint:#64757f; --hairline:#24323e;
  --accent:#4bb8c4; --accent-ink:#9fe0e8;
  --ok:#3fae7c; --ok-bg:#12301f; --bad:#e0685f; --bad-bg:#361a18;
  --warn:#d9be6a; --warn-bg:#2c2712;
}}
*{box-sizing:border-box}
body{margin:0;background:var(--ground);color:var(--ink);
  font:15px/1.5 "IBM Plex Sans",system-ui,sans-serif}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
code,.mono{font-family:"IBM Plex Mono",ui-monospace,monospace}
header.top{display:flex;align-items:center;gap:20px;padding:12px 20px;
  background:var(--surface);border-bottom:1px solid var(--hairline)}
header.top .brand{font-weight:600;letter-spacing:.02em}
header.top nav{display:flex;gap:16px;margin-left:auto;align-items:center}
header.top .who{color:var(--muted);font-size:13px}
main{max-width:1400px;margin:0 auto;padding:20px}
h1{font-size:22px;margin:.2em 0 .6em;text-wrap:balance}
h2{font-size:15px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);
  margin:0 0 10px}
.card{background:var(--surface);border:1px solid var(--hairline);border-radius:10px;padding:16px}
.grid{display:grid;gap:16px}
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:20px}
.stat{background:var(--surface);border:1px solid var(--hairline);border-radius:10px;padding:14px 16px}
.stat .n{font:600 26px/1 "IBM Plex Mono",monospace;font-variant-numeric:tabular-nums}
.stat .l{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.05em;margin-top:6px}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--hairline)}
th{color:var(--muted);font-weight:500;font-size:12px;text-transform:uppercase;letter-spacing:.04em}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums;font-family:"IBM Plex Mono",monospace}
.btn{display:inline-block;background:var(--accent);color:#fff;border:0;border-radius:8px;
  padding:9px 16px;font:inherit;font-weight:500;cursor:pointer}
.btn:hover{filter:brightness(1.06);text-decoration:none}
.btn.ghost{background:transparent;color:var(--accent);border:1px solid var(--hairline)}
.pill{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;font-weight:500}
.pill.ok{background:var(--ok-bg);color:var(--ok)}
.pill.bad{background:var(--bad-bg);color:var(--bad)}
.pill.warn{background:var(--warn-bg);color:var(--warn)}
.pill.muted{background:var(--surface-2);color:var(--muted)}

/* study workspace */
.work{display:grid;grid-template-columns:minmax(420px,1.3fr) 1fr 1.1fr;gap:16px;align-items:start}
@media(max-width:1200px){.work{grid-template-columns:1fr}}
.viewer{background:#000;border-radius:8px;overflow:hidden;position:relative;
  display:flex;align-items:center;justify-content:center;min-height:420px}
.viewer img{max-width:100%;max-height:78vh;display:block;transition:transform .1s}
.vbar{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}
.vbar button{background:var(--surface-2);border:1px solid var(--hairline);color:var(--ink);
  border-radius:6px;padding:5px 10px;font-size:13px;cursor:pointer}
.vbar button.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.report{white-space:pre-wrap;font-size:14px;line-height:1.6;max-height:78vh;overflow:auto}
.tags{max-height:78vh;overflow:auto}
.tags td{font-family:"IBM Plex Mono",monospace;font-size:12.5px;padding:4px 8px}
.tags tr.ident td{background:var(--warn-bg)}
.tags tr.private td{color:var(--faint)}
.checks{display:flex;flex-wrap:wrap;gap:6px;margin:6px 0 16px}
.chk{font-size:12px;padding:3px 9px;border-radius:6px}
.chk.ok{background:var(--ok-bg);color:var(--ok)}
.chk.bad{background:var(--bad-bg);color:var(--bad)}
.verdict{position:sticky;bottom:0;margin-top:16px}
.verdict label{display:inline-flex;align-items:center;gap:6px;margin-right:14px}
textarea,input[type=text],input[type=password],input[type=number],select{
  width:100%;padding:8px 10px;border:1px solid var(--hairline);border-radius:7px;
  background:var(--surface);color:var(--ink);font:inherit}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.login{max-width:340px;margin:12vh auto;text-align:left}
.err{color:var(--bad);font-size:14px;margin:8px 0}
.muted{color:var(--muted)}
kbd{font:600 11px/1 "IBM Plex Mono",monospace;background:rgba(255,255,255,.18);
  border:1px solid rgba(255,255,255,.35);border-radius:4px;padding:2px 5px;margin-left:6px}

/* dashboard facet cards */
.facet-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:900px){.facet-cards{grid-template-columns:1fr}}
.facet-card{display:flex;flex-direction:column;gap:12px}
.facet-nums{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.facet-nums .n{font:600 24px/1 "IBM Plex Mono",monospace;font-variant-numeric:tabular-nums}
.facet-nums .l{color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.05em;margin-top:4px}
.facet-nums .bad-n{color:var(--bad)}
.bar{height:6px;background:var(--surface-2);border-radius:999px;overflow:hidden}
.bar span{display:block;height:100%;background:var(--accent)}
.btn.big{padding:12px 18px;font-size:15px;text-align:center}

/* review page */
.review-head{display:flex;justify-content:space-between;align-items:center;gap:12px;
  flex-wrap:wrap;margin-bottom:12px}
.review-panel{margin-bottom:96px}
.report.big{font-size:15.5px;line-height:1.7;max-height:none}
.tags.wide{max-height:none}

/* sticky verdict bar */
.verdict-bar{position:fixed;left:0;right:0;bottom:0;z-index:20;
  background:var(--surface);border-top:1px solid var(--hairline);
  padding:12px 20px;box-shadow:0 -4px 16px rgba(0,0,0,.08)}
.vbtns{display:flex;gap:12px;align-items:center;max-width:1400px;margin:0 auto}
.btn.pass{background:var(--ok)}
.btn.notpass{background:var(--bad)}
.btn.pass,.btn.notpass{font-size:16px;padding:12px 26px;min-width:150px;text-align:center}
.vbtns .skip{font-size:12px;margin-left:auto}
.np-panel{max-width:1400px;margin:12px auto 0;display:grid;gap:10px}
.np-panel .row{justify-content:flex-start}