:root{
  --ink:#1A2238; --ink-2:#4A5270; --muted:#8A90A6; --line:#E3E6EF; --paper:#F4F5F9; --surface:#FFFFFF;
  --primary:#3346D3; --primary-ink:#FFFFFF; --primary-soft:#E9ECFD;
  --ok:#128A5B; --ok-soft:#E3F5EC; --bad:#D23F3F; --bad-soft:#FCEBEB; --warn:#B7791F; --warn-soft:#FDF3E1;
  --r-sm:6px; --r:10px;
  --font:"Onest", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0}
body{font:15px/1.5 var(--font);color:var(--ink);background:var(--paper);font-variant-numeric:tabular-nums}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
h1{font-size:26px;line-height:1.2;margin:0;font-weight:700;letter-spacing:-.01em}
h2{font-size:18px;margin:0 0 12px;font-weight:650}
h3{font-size:15px;margin:0 0 8px;font-weight:650}
.muted{color:var(--muted)}
.small{font-size:13px}

/* layout */
.shell{display:grid;grid-template-columns:232px 1fr;min-height:100vh}
.side{background:var(--ink);color:#C9CEE0;padding:22px 14px;position:sticky;top:0;height:100vh;display:flex;flex-direction:column;gap:4px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px;padding:0 10px 18px}
.brand-mark{display:grid;grid-template-columns:repeat(3,8px);gap:3px}
.brand-mark i{width:8px;height:8px;border-radius:50%;border:1.5px solid #6D7697}
.brand-mark i.on{background:#F5B82E;border-color:#F5B82E}
.side a.nav{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:var(--r-sm);color:#C9CEE0;font-weight:500}
.side a.nav:hover{background:rgba(255,255,255,.06);text-decoration:none;color:#fff}
.side a.nav.active{background:rgba(255,255,255,.1);color:#fff}
.side a.nav svg{width:18px;height:18px;flex:none;opacity:.85}
.side .spacer{flex:1}
.side .who{font-size:13px;padding:10px 12px;border-top:1px solid rgba(255,255,255,.08)}
.side .who a{color:#C9CEE0}
.main{padding:28px 36px 60px;min-width:0}
.head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px;flex-wrap:wrap}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:6px}
.crumbs a{color:var(--ink-2)}
.actions{display:flex;gap:8px;flex-wrap:wrap}

/* surfaces */
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.panel + .panel{margin-top:18px}
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}

.stat{padding:16px 18px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat b{display:block;font-size:28px;line-height:1.1;font-weight:700}
.stat span{font-size:13px;color:var(--muted)}
.stats{display:grid;grid-template-columns:repeat(5,1fr);padding:0}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:#fff;color:var(--ink);padding:8px 14px;border-radius:var(--r-sm);font:inherit;font-weight:550;cursor:pointer;line-height:1.2;white-space:nowrap}
.btn:hover{border-color:#C8CDDC;text-decoration:none}
.btn.primary{background:var(--primary);border-color:var(--primary);color:var(--primary-ink)}
.btn.primary:hover{background:#2A3BB8}
.btn.danger{color:var(--bad)}
.btn.danger:hover{background:var(--bad-soft);border-color:#F2C4C4}
.btn.sm{padding:5px 10px;font-size:13px}
.btn.ghost{border-color:transparent;background:transparent}
form.inline{display:inline}

/* forms */
.input{width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:var(--r-sm);font:inherit;background:#fff;color:var(--ink)}
.input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}
textarea.input{resize:vertical}
.field{margin-bottom:16px}
.field label{display:block;font-weight:550;font-size:14px;margin-bottom:6px}
.field .help{font-size:12.5px;color:var(--muted);margin-top:4px}
.field .err,.errorlist{color:var(--bad);font-size:13px;margin:4px 0 0;padding:0;list-style:none}
.checkrow{display:flex;align-items:center;gap:8px;font-weight:500}
.check{width:17px;height:17px;accent-color:var(--primary)}
.filters{display:grid;grid-template-columns:2fr repeat(6,1fr) auto;gap:10px;align-items:end}

/* tables */
.table-wrap{overflow-x:auto}
table.t{width:100%;border-collapse:collapse;font-size:14px}
.t th{text-align:left;font-weight:600;color:var(--ink-2);font-size:13px;padding:10px 12px;border-bottom:1px solid var(--line);white-space:nowrap;background:#FAFBFD}
.t td{padding:11px 12px;border-bottom:1px solid var(--line);vertical-align:middle}
.t tr:last-child td{border-bottom:0}
.t tr.click:hover td{background:#FAFBFE;cursor:pointer}
.t .num{text-align:right}
.t .nowrap{white-space:nowrap}

/* tags */
.tag{display:inline-block;padding:2px 8px;border-radius:999px;font-size:12px;font-weight:600;background:#EEF0F5;color:var(--ink-2)}
.tag.ok{background:var(--ok-soft);color:var(--ok)}
.tag.bad{background:var(--bad-soft);color:var(--bad)}
.tag.warn{background:var(--warn-soft);color:var(--warn)}

/* score cells */
.score{display:flex;flex-direction:column;gap:4px;min-width:74px}
.score small{color:var(--muted);font-size:12px}
.bar{height:5px;background:#ECEEF4;border-radius:3px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--ink-2)}
.pct-big{font-size:15px;font-weight:700}

/* answer sheet — the signature */
.sheet{display:flex;flex-direction:column;gap:14px}
.sheet-row{display:grid;grid-template-columns:130px 1fr 90px;gap:14px;align-items:center}
.sheet-row .lbl{font-weight:600}
.bubbles{display:flex;flex-wrap:wrap;gap:6px}
.bubble{width:22px;height:22px;border-radius:50%;border:1.5px solid #C9CEDC;display:grid;place-items:center;font-size:10.5px;font-weight:600;color:var(--muted);text-decoration:none}
.bubble:hover{text-decoration:none}
.bubble.ok{background:var(--ok);border-color:var(--ok);color:#fff}
.bubble.bad{background:#fff;border-color:var(--bad);color:var(--bad)}
.sheet-row .res{text-align:right;font-weight:700}
.total-line{display:flex;align-items:baseline;gap:14px;padding-top:14px;border-top:1px dashed var(--line)}
.total-line b{font-size:40px;line-height:1;letter-spacing:-.02em}

/* question list */
.qcard{border:1px solid var(--line);border-radius:var(--r);padding:16px 18px;background:#fff}
.qcard + .qcard{margin-top:10px}
.qcard.off{opacity:.6}
.qhead{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}
.qnum{font-weight:700;color:var(--muted);margin-right:8px}
.qtext{white-space:pre-line}
.qtext-en{color:var(--ink-2);font-size:14px;white-space:pre-line;margin-top:2px}
.opts{list-style:none;padding:0;margin:10px 0 0;display:grid;gap:4px}
.opts li{display:flex;gap:8px;font-size:14px;padding:4px 8px;border-radius:var(--r-sm)}
.opts li.correct{background:var(--ok-soft)}
.opts li.picked{outline:1.5px solid var(--bad);background:var(--bad-soft)}
.opts li.correct.picked{outline-color:var(--ok);background:var(--ok-soft)}
.opts .ltr{font-weight:700;width:18px;flex:none;color:var(--ink-2)}
.qimg{max-width:260px;border-radius:var(--r-sm);border:1px solid var(--line);margin-top:10px}

/* option formset */
.opt-row{display:grid;grid-template-columns:28px 1fr 1fr 110px 40px;gap:10px;align-items:center;padding:8px 0;border-bottom:1px solid var(--line)}
.opt-row .ltr{font-weight:700;color:var(--muted);text-align:center}
.opt-row.removed{display:none}
.opt-head{font-size:13px;color:var(--muted);font-weight:600;border-bottom:1px solid var(--line)}
.correct-pick{display:flex;align-items:center;gap:6px;font-size:13px;font-weight:550}

/* part cards on package page */
.parts{display:grid;gap:12px}
.part{display:grid;grid-template-columns:28px 44px 1fr auto;gap:16px;align-items:center;padding:16px 18px;border:1px solid var(--line);border-radius:var(--r);background:#fff;border-left:4px solid var(--ink-2)}
.part .n{font-size:22px;font-weight:700;color:var(--muted)}
.part .t{font-weight:650}
.part .reorder{display:flex;flex-direction:column;gap:2px}
.part .reorder .btn{padding:2px 6px;line-height:1.3}
.part .reorder .btn:disabled{opacity:.3;cursor:default}

/* messages */
.msgs{margin-bottom:18px;display:grid;gap:8px}
.msg{padding:10px 14px;border-radius:var(--r-sm);background:var(--primary-soft);color:#24309A;font-size:14px}
.msg.success{background:var(--ok-soft);color:var(--ok)}
.msg.error{background:var(--bad-soft);color:var(--bad)}
.msg.warning{background:var(--warn-soft);color:var(--warn)}

.empty{text-align:center;padding:40px 20px;color:var(--muted)}
.empty .btn{margin-top:12px}
.pager{display:flex;gap:6px;justify-content:flex-end;align-items:center;margin-top:14px;font-size:14px}
dl.kv{display:grid;grid-template-columns:140px 1fr;gap:8px 12px;margin:0;font-size:14px}
dl.kv dt{color:var(--muted)} dl.kv dd{margin:0;font-weight:550}

/* login */
.login{min-height:100vh;display:grid;place-items:center;padding:20px}
.login .panel{width:100%;max-width:380px;padding:30px}
.login .brand{color:var(--ink);padding:0 0 20px}

@media (max-width:1100px){.filters{grid-template-columns:repeat(3,1fr)}.stats{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:820px){
  .shell{grid-template-columns:1fr}
  .side{position:static;height:auto;flex-direction:row;flex-wrap:wrap;padding:12px}
  .brand{padding:6px 10px;width:100%}
  .side .spacer,.side .who{display:none}
  .main{padding:20px 16px 40px}
  .g2,.g3,.g4,.stats{grid-template-columns:1fr 1fr}
  .filters{grid-template-columns:1fr 1fr}
  .sheet-row{grid-template-columns:1fr}
  .sheet-row .res{text-align:left}
  .opt-row{grid-template-columns:24px 1fr 40px}
  .opt-row .en-col,.opt-row .correct-pick{grid-column:2}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

/* fixes */
.filters label{display:block;margin-bottom:4px}
.filters{grid-template-columns:1.8fr repeat(3,1fr) 1.2fr 1.2fr .8fr auto}
.grid > .panel + .panel{margin-top:0}
.grid + .panel{margin-top:18px}
@media (max-width:1100px){.filters{grid-template-columns:repeat(3,1fr)}}
@media (max-width:820px){.filters{grid-template-columns:1fr 1fr}}