/* Chakrilab Exam — UI styles */
:root{
  --p:#4f46e5;--p2:#6366f1;--pd:#3730a3;--ps:#eef2ff;
  --ink:#0f172a;--ink2:#334155;--mut:#64748b;--line:#e2e8f0;--line2:#f1f5f9;
  --bg:#f5f6fb;--card:#fff;
  --ok:#059669;--oks:#ecfdf5;--warn:#d97706;--warns:#fffbeb;--bad:#dc2626;--bads:#fef2f2;--info:#0284c7;--infos:#f0f9ff;
  --r:14px;--sh:0 1px 2px rgba(15,23,42,.05),0 4px 14px rgba(15,23,42,.05);--sh2:0 12px 40px rgba(15,23,42,.16);
  --font:'Hind Siliguri','Noto Sans Bengali','SolaimanLipi',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);background:var(--bg);color:var(--ink);font-size:15.5px;line-height:1.6;-webkit-font-smoothing:antialiased}
body.no-scroll{overflow:hidden}
[hidden]{display:none!important}
a{color:var(--p);text-decoration:none}
h1,h2,h3,h4{margin:0 0 .4em;line-height:1.35;color:var(--ink)}
h1{font-size:1.6rem}h2{font-size:1.3rem}h3{font-size:1.1rem}h4{font-size:1rem}
p{margin:0 0 .8em}
img{max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
code{background:var(--line2);padding:1px 6px;border-radius:6px;font-size:.88em}
pre{margin:0}
.muted{color:var(--mut)}.small{font-size:.86rem}.strong{font-weight:700}.mono{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.9em}
.spacer{flex:1 1 auto}
.row{display:flex;align-items:center}.row.gap{gap:10px}.row.wrap{flex-wrap:wrap}.row.between{justify-content:space-between;gap:10px}.row.center{justify-content:center}
.stack{display:flex;flex-direction:column;gap:16px}
.grid{display:grid;gap:16px}.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))}
.form .grid{gap:0 16px}
.ic{display:inline-flex;align-items:center;justify-content:center;flex:none;line-height:0}.ic svg{display:block}
.rich{word-break:break-word}.rich sub,.rich sup{line-height:0}
.cl-boot{min-height:60vh;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--mut);gap:10px}
.cl-spinner{width:34px;height:34px;border-radius:50%;border:3px solid var(--line);border-top-color:var(--p);animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.loading{padding:60px 0;text-align:center;color:var(--mut);display:flex;flex-direction:column;align-items:center;gap:10px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:11px;border:1px solid var(--line);background:#fff;color:var(--ink2);font-weight:600;cursor:pointer;transition:.15s;text-decoration:none;white-space:nowrap;line-height:1.3;min-height:42px}
.btn:hover{background:var(--line2)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.primary{background:var(--p);border-color:var(--p);color:#fff}.btn.primary:hover{background:var(--pd);border-color:var(--pd)}
.btn.success{background:var(--ok);border-color:var(--ok);color:#fff}.btn.success:hover{background:#047857}
.btn.danger{background:var(--bad);border-color:var(--bad);color:#fff}.btn.danger:hover{background:#b91c1c}
.btn.danger.ghost{background:#fff;color:var(--bad);border-color:#fecaca}.btn.danger.ghost:hover{background:var(--bads)}
.btn.ghost{background:#fff}
.btn.light{background:#fff;color:var(--p);border-color:#fff}.btn.light:hover{background:var(--ps)}
.btn.outline-light{background:transparent;border-color:rgba(255,255,255,.55);color:#fff}.btn.outline-light:hover{background:rgba(255,255,255,.14)}
.btn.sm{padding:6px 12px;font-size:.86rem;min-height:34px;border-radius:9px}
.btn.lg{padding:13px 26px;font-size:1.05rem;min-height:50px}
.btn.block{display:flex;width:100%}
.btn.is-busy{position:relative;color:transparent!important;pointer-events:none}
.btn.is-busy .ic{opacity:0}
.btn.is-busy::after{content:"";position:absolute;width:18px;height:18px;border-radius:50%;border:2.5px solid rgba(255,255,255,.55);border-top-color:#fff;animation:spin .7s linear infinite}
.btn.ghost.is-busy::after,.btn:not(.primary):not(.success):not(.danger).is-busy::after{border-color:var(--line);border-top-color:var(--p)}
.icon-btn{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:9px;border:0;background:transparent;color:var(--mut);cursor:pointer;transition:.15s;flex:none}
.icon-btn:hover{background:var(--line2);color:var(--ink)}
.icon-btn.dng:hover{background:var(--bads);color:var(--bad)}.icon-btn.ok:hover{background:var(--oks);color:var(--ok)}
.icon-btn.dis{opacity:.3;pointer-events:none}
.icon-btn.on-dark{color:#c7d2fe}.icon-btn.on-dark:hover{background:rgba(255,255,255,.12);color:#fff}
.link{background:none;border:0;padding:0;color:var(--p);cursor:pointer;font-weight:500;text-decoration:none}.link:hover{text-decoration:underline}

/* ---------- forms ---------- */
.form{display:block}
.field{display:block;margin-bottom:14px}
.lbl{display:block;font-weight:600;font-size:.9rem;margin-bottom:5px;color:var(--ink2)}
.hint{display:block;font-size:.8rem;color:var(--mut);margin-top:4px}
.in{display:block;width:100%;padding:10px 13px;border:1px solid #cbd5e1;border-radius:11px;background:#fff;outline:none;transition:.15s;min-height:44px}
textarea.in{min-height:84px;resize:vertical;line-height:1.55}
select.in{appearance:auto}
.in:focus{border-color:var(--p2);box-shadow:0 0 0 3px rgba(99,102,241,.18)}
.in:disabled{background:var(--line2);color:var(--mut)}
input[type=file].in{padding:8px}
.check{display:flex;gap:10px;align-items:flex-start;cursor:pointer;margin-bottom:10px}
.check input{width:18px;height:18px;margin-top:3px;accent-color:var(--p);flex:none}
.check b{display:block;font-weight:600}.check small{display:block;color:var(--mut);font-size:.82rem;font-weight:400}
.check.inline{display:inline-flex;align-items:center;margin:0}.check.inline input{margin-top:0}
.checks{display:grid;gap:4px;margin:6px 0 4px}
.form-err{background:var(--bads);color:#991b1b;border:1px solid #fecaca;border-radius:11px;padding:10px 14px;margin:10px 0;font-size:.92rem}
.pw{position:relative}.pw .in{padding-right:46px}
.pw-toggle{position:absolute;right:4px;top:50%;transform:translateY(-50%);width:38px;height:38px;border:0;background:none;color:var(--mut);cursor:pointer;border-radius:9px}.pw-toggle.on{color:var(--p)}
.hp{position:absolute!important;left:-9999px;top:auto;width:1px;height:1px;opacity:0;overflow:hidden}
.notice{display:flex;gap:10px;align-items:flex-start;padding:12px 15px;border-radius:12px;font-size:.92rem;margin-bottom:14px;border:1px solid}
.notice .ic{margin-top:2px}
.notice.n-info{background:var(--infos);border-color:#bae6fd;color:#075985}
.notice.n-ok{background:var(--oks);border-color:#a7f3d0;color:#065f46}
.notice.n-err{background:var(--bads);border-color:#fecaca;color:#991b1b}

/* ---------- misc widgets ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);padding:20px;margin-bottom:16px}
.stack>.card,.stack>.qcard,.stack>.qstat,.stack>.rq{margin-bottom:0}
.card-t{font-size:1.05rem;margin:0 0 14px}
.sec-t{margin:28px 0 12px;font-size:1.08rem}
.badge{display:inline-flex;align-items:center;gap:5px;padding:2px 10px;border-radius:99px;font-size:.78rem;font-weight:600;background:var(--line2);color:var(--ink2);white-space:nowrap}
.badge.b-green{background:var(--oks);color:#047857}.badge.b-red{background:var(--bads);color:#b91c1c}.badge.b-blue{background:var(--ps);color:var(--p)}.badge.b-amber{background:var(--warns);color:#b45309}.badge.b-gray{background:var(--line2);color:var(--ink2)}
.seg{display:inline-flex;background:var(--line2);padding:4px;border-radius:12px;gap:2px;flex-wrap:wrap;margin-bottom:16px}
.filters .seg{margin-bottom:0}
.seg button{border:0;background:none;padding:7px 14px;border-radius:9px;cursor:pointer;font-weight:600;color:var(--mut);white-space:nowrap}
.seg button.on{background:#fff;color:var(--p);box-shadow:0 1px 3px rgba(15,23,42,.12)}
.seg .cnt{background:var(--line);color:var(--ink2);border-radius:20px;font-size:.72rem;padding:1px 7px;margin-left:5px}
.seg button.on .cnt{background:var(--ps);color:var(--p)}
.filters{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:16px}
.filters .in{width:auto;min-width:150px}
.search-in{position:relative;flex:1 1 220px;min-width:200px}
.search-in .ic{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--mut)}
.search-in .in{padding-left:40px;width:100%}
.empty{text-align:center;padding:48px 16px;color:var(--mut)}
.empty h4{color:var(--ink2);font-size:1.1rem;margin-bottom:4px}
.empty-ic{width:64px;height:64px;border-radius:50%;background:var(--ps);color:var(--p);display:grid;place-items:center;margin:0 auto 12px}
.pager{display:flex;justify-content:center;align-items:center;gap:12px;margin:18px 0;flex-wrap:wrap}
.progress{height:10px;background:var(--line2);border-radius:99px;overflow:hidden;margin:10px 0}.progress i{display:block;height:100%;background:var(--p);transition:width .3s}

/* tables */
.tbl-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh)}
.tbl{width:100%;border-collapse:collapse;min-width:620px}
.tbl th{background:#f8fafc;text-align:left;font-size:.8rem;color:var(--mut);font-weight:600;padding:11px 14px;border-bottom:1px solid var(--line);white-space:nowrap}
.tbl td{padding:12px 14px;border-bottom:1px solid var(--line2);vertical-align:middle;font-size:.93rem}
.tbl tr:last-child td{border-bottom:0}
.tbl tbody tr:hover td{background:#fafbff}
.tbl td.actions,.tbl th.actions{text-align:right;white-space:nowrap}
.row-actions{display:inline-flex;gap:6px;align-items:center;justify-content:flex-end;flex-wrap:wrap}
.cell-sub{font-size:.82rem;color:var(--mut);line-height:1.5}.cell-sub.warn{color:var(--warn)}
.medal{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:50%;font-weight:700;color:#fff;background:#94a3b8;font-size:.85rem}
.medal.m1{background:#f59e0b}.medal.m2{background:#94a3b8}.medal.m3{background:#c2763a}

/* modal & toast */
.modal-back{position:fixed;inset:0;background:rgba(15,23,42,.55);z-index:100;display:flex;align-items:flex-start;justify-content:center;padding:5vh 14px;overflow-y:auto;animation:fade .15s}
.modal-back.out{opacity:0;transition:opacity .15s}
@keyframes fade{from{opacity:0}}
.modal{background:#fff;border-radius:18px;width:100%;max-width:520px;box-shadow:var(--sh2);margin:auto 0;animation:pop .18s}
.modal.wide{max-width:860px}
@keyframes pop{from{transform:translateY(12px) scale(.98);opacity:0}}
.modal-h{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:14px 18px 14px 22px;border-bottom:1px solid var(--line)}
.modal-h h3{margin:0}
.modal-b{padding:20px 22px}
.modal-f{padding:14px 22px;border-top:1px solid var(--line);display:flex;gap:10px;justify-content:flex-end;align-items:center;flex-wrap:wrap;background:#fafbff;border-radius:0 0 18px 18px}
.confirm-msg{margin:0 0 12px;color:var(--ink2)}
.toasts{position:fixed;right:16px;bottom:16px;z-index:300;display:flex;flex-direction:column;gap:8px;max-width:calc(100vw - 32px)}
.toast{background:var(--ink);color:#fff;padding:12px 16px;border-radius:12px;box-shadow:var(--sh2);display:flex;gap:10px;align-items:center;animation:pop .2s;max-width:420px;transition:.3s}
.toast.t-ok{background:#047857}.toast.t-err{background:#b91c1c}.toast.out{opacity:0;transform:translateY(8px)}

/* brand */
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;color:var(--ink);text-decoration:none;min-width:0}
.brand.light{color:#fff}
.brand-mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,#6366f1,#4338ca);color:#fff;display:grid;place-items:center;flex:none}
.brand-img{width:38px;height:38px;border-radius:11px;object-fit:cover;flex:none}
.brand-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.avatar{width:38px;height:38px;border-radius:50%;background:var(--p2);color:#fff;display:grid;place-items:center;font-weight:700;flex:none}.avatar.sm{width:32px;height:32px;font-size:.9rem}

/* ---------- dashboard shell ---------- */
.app-shell{display:flex;min-height:100vh}
.sidebar{width:264px;background:linear-gradient(180deg,#1e1b4b,#0f172a);color:#c7d2fe;position:fixed;inset:0 auto 0 0;display:flex;flex-direction:column;z-index:50;transition:transform .25s}
.side-top{padding:18px 20px 12px}
.side-nav{flex:1;overflow-y:auto;padding:6px 12px;display:flex;flex-direction:column;gap:3px}
.nav-a{display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:11px;color:#c7d2fe;font-weight:500;text-decoration:none}
.nav-a:hover{background:rgba(255,255,255,.08);color:#fff}
.nav-a.active{background:var(--p);color:#fff;font-weight:600}
.nav-badge{margin-left:auto;font-style:normal;background:#ef4444;color:#fff;font-size:.72rem;border-radius:99px;padding:0 8px;min-width:20px;text-align:center;line-height:20px}
.ghost-link{margin:4px 12px 10px;opacity:.75;font-size:.9rem}
.side-user{display:flex;gap:10px;align-items:center;padding:14px 16px;border-top:1px solid rgba(255,255,255,.1)}
.who{min-width:0;flex:1}.who b{display:block;color:#fff;font-size:.93rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.who small{display:block;color:#a5b4fc;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.main-col{margin-left:264px;flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{display:none;height:58px;align-items:center;gap:10px;padding:0 14px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30}
.content{padding:28px;max-width:1240px;width:100%;margin:0 auto;flex:1}
.nav-shade{display:none}
.narrow{max-width:760px;margin:0 auto}.narrow.wide{max-width:960px}
.page-head{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;flex-wrap:wrap;margin-bottom:22px}
.page-head h1{margin:0}.page-head p{margin:3px 0 0}
.page-actions{display:flex;gap:10px;flex-wrap:wrap}
.back-link{display:inline-flex;align-items:center;gap:6px;color:var(--mut);margin-bottom:14px;font-weight:500;text-decoration:none}.back-link:hover{color:var(--p)}
.sticky-save{position:sticky;bottom:0;padding:14px 0;background:linear-gradient(180deg,rgba(245,246,251,0),var(--bg) 35%);z-index:5}

/* stats */
.stats{margin-bottom:20px}
.stat{--tc:var(--p);display:flex;gap:14px;align-items:center;padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);color:inherit;text-decoration:none;transition:.15s;min-width:0}
a.stat:hover{transform:translateY(-2px);box-shadow:var(--sh2)}
.stat.s-indigo{--tc:#4f46e5}.stat.s-green{--tc:#059669}.stat.s-amber{--tc:#d97706}.stat.s-blue{--tc:#0284c7}.stat.s-red{--tc:#dc2626}.stat.s-gray{--tc:#64748b}
.stat-i{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;flex:none;color:var(--tc);background:color-mix(in srgb,var(--tc) 12%,#fff)}
.stat:not(:has(.stat-i)){border-left:4px solid var(--tc)}
.stat-n{font-size:1.5rem;font-weight:700;line-height:1.15}
.stat-l{color:var(--mut);font-size:.84rem}
.bars{display:flex;gap:6px;height:190px;margin-top:8px}
.bar{position:relative;flex:1;min-width:0;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;padding:20px 0 22px}
.bar i{display:block;width:70%;max-width:30px;background:linear-gradient(180deg,var(--p2),var(--p));border-radius:7px 7px 2px 2px}
.bar-v{position:absolute;top:0;left:0;right:0;text-align:center;font-size:.72rem;font-weight:600;color:var(--ink2)}
.bar-l{position:absolute;bottom:0;left:0;right:0;text-align:center;font-size:.72rem;color:var(--mut)}
.banner{display:flex;align-items:center;gap:12px;padding:14px 18px;border-radius:var(--r);background:var(--warns);color:#92400e;border:1px solid #fde68a;margin-bottom:18px;text-decoration:none}
.banner em{margin-left:auto;font-style:normal;font-weight:600}
.banner.soft{background:var(--ps);color:var(--pd);border-color:#c7d2fe}
.steps ol{list-style:none;counter-reset:s;padding:0;margin:0;display:grid;gap:12px}
.steps li{counter-increment:s;display:flex;flex-wrap:wrap;gap:4px 12px;align-items:center;padding-left:42px;position:relative;min-height:32px}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:30px;height:30px;border-radius:50%;background:var(--ps);color:var(--p);display:grid;place-items:center;font-weight:700}
.steps li.done::before{content:"✓";background:var(--ok);color:#fff}
.steps li span{color:var(--mut);flex-basis:100%;font-size:.88rem;margin-top:-4px}
.split{align-items:start;margin-bottom:16px}.split>.card{margin-bottom:0}
.kv{display:grid;gap:2px}
.kv-r{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:9px 0;border-bottom:1px dashed var(--line)}.kv-r:last-child{border-bottom:0}.kv-r>span{color:var(--mut)}
.dl{display:grid;grid-template-columns:140px 1fr;gap:10px 14px;margin:0}.dl dt{color:var(--mut)}.dl dd{margin:0;word-break:break-word;white-space:pre-wrap}
.gate{max-width:560px;margin:6vh auto;text-align:center;padding:0 16px}
.gate-ic{width:84px;height:84px;border-radius:50%;display:grid;place-items:center;margin:0 auto 16px}
.gate-ic.g-amber{background:var(--warns);color:var(--warn)}.gate-ic.g-red{background:var(--bads);color:var(--bad)}
.gate-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:6px 18px;margin:18px 0;text-align:left}
.gate .notice{text-align:left}

/* question cards */
.qlist{display:block}
.qcard{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:16px 18px;margin-bottom:12px;box-shadow:var(--sh)}
.qlist.compact .qcard{padding:12px 14px;box-shadow:none}
.qcard-h{display:flex;gap:12px;align-items:flex-start}
.qno{min-width:30px;height:30px;padding:0 6px;border-radius:9px;background:var(--ps);color:var(--p);display:grid;place-items:center;font-weight:700;font-size:.85rem;flex:none}
.qno:empty{display:none}
.qtext{flex:1;min-width:0;font-weight:600;word-break:break-word}
.qactions{display:flex;gap:2px;flex:none}
.chk-sq input{width:18px;height:18px;accent-color:var(--p);margin-top:6px}.chk-sq span{display:none}
.qopts{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:12px 0 0 42px}
.qopt{display:flex;gap:8px;align-items:flex-start;padding:8px 12px;border:1px solid var(--line);border-radius:10px;font-size:.93rem;min-width:0}
.qopt>b{color:var(--mut);flex:none}
.qopt.ok{background:var(--oks);border-color:#6ee7b7}.qopt.ok>.ic{margin-left:auto;color:var(--ok)}
.qopt.bad{background:var(--bads);border-color:#fca5a5}
.qopt small{margin-left:auto;font-weight:600;white-space:nowrap}
.qtags{display:flex;gap:6px;flex-wrap:wrap;margin:12px 0 0 42px}
.qexp{margin:10px 0 0 42px;padding:10px 14px;background:var(--infos);color:#075985;border-radius:10px;font-size:.9rem}
.rq{background:#fff;border:1px solid var(--line);border-left:4px solid #94a3b8;border-radius:var(--r);padding:16px 18px}
.rq.rq-right{border-left-color:var(--ok)}.rq.rq-wrong{border-left-color:var(--bad)}.rq.rq-skip{border-left-color:#94a3b8}
.bulk{display:flex;align-items:center;gap:10px;background:var(--ps);padding:10px 14px;border-radius:12px;margin-bottom:12px}
.fmt-bar{display:flex;gap:6px;align-items:center;margin:-6px 0 14px;flex-wrap:wrap}
.fmt{min-width:32px;height:30px;border:1px solid var(--line);background:#fff;border-radius:7px;cursor:pointer;padding:0 8px}.fmt:hover{background:var(--line2)}
.opt-edits{display:grid;gap:10px;margin:8px 0 14px}
.opt-edit{display:flex;gap:10px;align-items:center}.opt-edit .in{flex:1}
.opt-letter{width:28px;font-weight:700;color:var(--mut);text-align:center;flex:none}
.opt-ok{display:flex;flex-direction:column;align-items:center;font-size:.7rem;color:var(--ok);min-width:44px;cursor:pointer}.opt-ok input{width:20px;height:20px;accent-color:var(--ok)}
.err-list{margin:8px 0 0;padding-left:18px;color:var(--bad);font-size:.88rem;max-height:160px;overflow:auto}
.import-log{margin-top:6px}
.mode-cards{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:14px}
.mode-card{display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border:2px solid var(--line);border-radius:var(--r);cursor:pointer;transition:.15s}
.mode-card:has(input:checked){border-color:var(--p);background:var(--ps)}
.mode-card input{margin-top:5px;accent-color:var(--p)}.mode-card b{display:block}.mode-card small{display:block;color:var(--mut)}
.qstat{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:14px 16px}
.qstat-h{display:flex;gap:12px;align-items:flex-start}
.qstat-b{margin:10px 0 0 42px;display:grid;gap:6px}
.meter{height:8px;background:var(--line2);border-radius:99px;overflow:hidden}.meter i{display:block;height:100%;border-radius:99px}.meter i.g{background:var(--ok)}.meter i.a{background:var(--warn)}.meter i.r{background:var(--bad)}
.optdist{display:flex;gap:8px;flex-wrap:wrap}.od{padding:2px 10px;background:var(--line2);border-radius:8px;font-size:.82rem}.od.ok{background:var(--oks);color:#047857;font-weight:600}

/* ---------- auth ---------- */
.auth-wrap{min-height:100vh;display:grid;grid-template-columns:1.05fr 1fr;background:#fff}
.auth-side{background:linear-gradient(150deg,#1e1b4b,#4338ca 70%,#6366f1);color:#fff;padding:44px;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden}
.auth-side::after{content:"";position:absolute;width:440px;height:440px;border-radius:50%;background:rgba(255,255,255,.07);right:-150px;bottom:-130px}
.auth-pitch{position:relative;z-index:1}
.auth-pitch h2{color:#fff;font-size:2rem;margin-bottom:12px}
.auth-pitch p{color:#c7d2fe;font-size:1.05rem;max-width:430px}
.auth-pitch ul{list-style:none;padding:0;margin:24px 0 0;display:grid;gap:12px}
.auth-pitch li{display:flex;gap:10px;align-items:center;color:#e0e7ff}.auth-pitch li .ic{color:#a5b4fc}
.auth-foot{color:#a5b4fc;position:relative;z-index:1}
.auth-main{display:flex;align-items:center;justify-content:center;padding:32px 18px}
.auth-card{width:100%;max-width:440px}
.auth-card h1{font-size:1.6rem}
.auth-mobile-logo{display:none;margin-bottom:22px}
.auth-links{margin-top:18px;text-align:center;color:var(--mut)}
.success-panel{text-align:center;padding:10px 0}
.success-ic{width:72px;height:72px;border-radius:50%;background:var(--ps);color:var(--p);display:grid;place-items:center;margin:0 auto 14px}
.success-panel .btn{margin-top:8px}
.resend{margin:0 0 10px}

/* ---------- public / student ---------- */
.public-shell{min-height:100vh;display:flex;flex-direction:column}
.topnav{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40}
.topnav-in{max-width:1180px;margin:0 auto;padding:0 20px;min-height:64px;display:flex;align-items:center;gap:18px}
.top-links{display:flex;gap:4px;margin-left:8px}
.top-a{padding:8px 14px;border-radius:9px;color:var(--ink2);font-weight:500;text-decoration:none}.top-a:hover{background:var(--line2)}.top-a.active{background:var(--ps);color:var(--p);font-weight:600}
.top-user{display:flex;align-items:center;gap:6px}
.top-profile{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--ink);padding:3px 12px 3px 3px;border-radius:99px;border:1px solid var(--line)}.top-profile.active{border-color:var(--p)}
.top-profile .nm{max-width:130px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:.9rem}
.public-shell .content{max-width:1180px;padding:24px 20px 50px}
.site-foot{padding:22px;text-align:center;color:var(--mut);border-top:1px solid var(--line);background:#fff;font-size:.85rem}
.hero{background:linear-gradient(135deg,#312e81,#4338ca 55%,#6366f1);color:#fff;border-radius:22px;padding:40px 36px;margin-bottom:24px;display:flex;gap:20px;justify-content:space-between;align-items:center;flex-wrap:wrap;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-70px;top:-70px;width:280px;height:280px;border-radius:50%;background:rgba(255,255,255,.08);pointer-events:none}
.hero h1{color:#fff;font-size:2rem;margin-bottom:6px}.hero p{color:#e0e7ff;max-width:560px;margin:0;font-size:1.05rem}
.hero>*{position:relative;z-index:1}
.ecards{gap:18px}
.ecard{display:flex;flex-direction:column;gap:10px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--sh);text-decoration:none;color:var(--ink);transition:.18s;min-width:0}
.ecard:hover{transform:translateY(-3px);box-shadow:var(--sh2)}
.ecard h3{margin:0;font-size:1.08rem;line-height:1.45}
.ecard-top{display:flex;justify-content:space-between;align-items:center;gap:8px}
.ecard-inst{font-size:.83rem;color:var(--mut);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ecard-desc{margin:0;color:var(--ink2);font-size:.9rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ecard-meta{display:flex;flex-wrap:wrap;gap:6px 14px;color:var(--mut);font-size:.84rem}.ecard-meta span{display:inline-flex;gap:5px;align-items:center}.ecard-meta .neg{color:var(--bad)}
.ecard-when{display:flex;align-items:center;gap:6px;font-size:.85rem;padding:7px 10px;border-radius:9px;background:var(--line2);color:var(--mut)}
.ecard-when.up{background:var(--infos);color:#0369a1}.ecard-when.live{background:var(--oks);color:#047857}
.pulse{width:9px;height:9px;border-radius:50%;background:var(--ok);flex:none;animation:pulse 1.4s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(5,150,105,.5)}100%{box-shadow:0 0 0 9px rgba(5,150,105,0)}}
.ecard-cta{margin-top:auto;display:flex;align-items:center;gap:6px;color:var(--p);font-weight:600;padding-top:10px;border-top:1px dashed var(--line)}
.exam-hero h1{font-size:1.6rem;margin:10px 0 6px}
.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin-top:16px}
.info-i{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;background:#f8fafc;border-radius:12px}.info-i .ic{color:var(--p);margin-top:3px}.info-i small{display:block;color:var(--mut);font-size:.76rem}
.instr{margin-top:16px;padding:14px 16px;background:var(--warns);border:1px solid #fde68a;border-radius:12px}.instr h4{margin-bottom:4px}.instr p{white-space:pre-wrap;margin:0}
.cta{margin-top:18px}.cta.ok{border-color:#a7f3d0;background:linear-gradient(180deg,#f0fdf9,#fff)}
.rules{margin:10px 0 16px;padding-left:20px;color:var(--ink2)}
.countdown{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:16px}
.cd-n{font-size:1.5rem;color:var(--p);font-variant-numeric:tabular-nums}
.pay-card{margin-top:18px}
.pay-amount{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:var(--ps);border-radius:12px;margin-bottom:14px}.pay-amount b{font-size:1.4rem;color:var(--p)}
.pay-steps{display:grid;gap:12px;margin-bottom:16px}
.pay-info{margin:6px 0 0;white-space:pre-wrap;font-family:inherit;background:var(--warns);border:1px dashed #fcd34d;padding:12px 14px;border-radius:12px;font-size:.95rem}
.methods{display:flex;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.method{flex:1;min-width:96px;border:2px solid var(--line);border-radius:12px;padding:10px;text-align:center;font-weight:600;cursor:pointer;transition:.15s}
.method input{display:none}
.method:has(input:checked){border-color:var(--p);background:var(--ps);color:var(--p)}
.method.m-bkash:has(input:checked){border-color:#e2136e;background:#fdf2f8;color:#e2136e}
.method.m-nagad:has(input:checked){border-color:#f6921e;background:#fff7ed;color:#c2410c}
.method.m-rocket:has(input:checked){border-color:#8c3494;background:#faf5ff;color:#8c3494}
.result-hero{display:flex;gap:28px;align-items:center;padding:26px;flex-wrap:wrap}
.ring{position:relative;width:150px;height:150px;flex:none}
.ring svg{display:block}
.rg-bg{fill:none;stroke:var(--line2);stroke-width:10}
.rg-fg{fill:none;stroke-width:10;stroke-linecap:round}
.ring.ok .rg-fg{stroke:var(--ok)}.ring.bad .rg-fg{stroke:var(--bad)}
.ring-t{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}.ring-t b{font-size:1.7rem;line-height:1.1}.ring-t small{color:var(--mut)}
.rh-body{flex:1;min-width:220px}.rh-body h1{font-size:1.35rem;margin:2px 0 8px}
.score-line{font-size:1.05rem;margin-bottom:10px}.score-line b{font-size:2rem}

/* ---------- exam room ---------- */
.room{min-height:100vh;background:#f1f3fb;display:flex;flex-direction:column}
.room-top{position:sticky;top:0;z-index:30;background:#fff;border-bottom:1px solid var(--line);padding:10px 18px;display:flex;align-items:center;gap:12px;box-shadow:0 2px 10px rgba(15,23,42,.05)}
.room-title{flex:1;min-width:0;display:flex;flex-direction:column}.room-title b{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.room-title .prog{font-size:.8rem;color:var(--mut)}
.timer{display:flex;align-items:center;gap:8px;background:var(--ps);color:var(--p);padding:7px 14px;border-radius:12px;font-weight:700;font-size:1.2rem;font-variant-numeric:tabular-nums;min-width:112px;justify-content:center}
.timer.warn{background:var(--warns);color:var(--warn)}
.timer.danger{background:var(--bads);color:var(--bad);animation:blink 1s infinite}
@keyframes blink{50%{opacity:.65}}
.pal-toggle{display:none}
.room-body{max-width:1180px;width:100%;margin:0 auto;padding:20px 18px 40px;display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:20px;align-items:start}
.q-main{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:var(--sh)}
.q-head{display:flex;align-items:center;gap:10px;margin-bottom:16px;flex-wrap:wrap}
.q-num{font-weight:700;color:var(--p)}.q-marks{color:var(--mut);font-size:.88rem;margin-right:auto}
.mark-btn{display:inline-flex;gap:6px;align-items:center;border:1px solid var(--line);background:#fff;padding:6px 12px;border-radius:9px;cursor:pointer;color:var(--ink2);font-size:.88rem}
.mark-btn.on{background:var(--warns);border-color:#fcd34d;color:#92400e}
.q-text{font-size:1.2rem;line-height:1.7;font-weight:600;margin-bottom:20px;word-break:break-word}
.q-opts{display:grid;gap:10px}
.q-opt{display:flex;gap:14px;align-items:center;width:100%;text-align:left;padding:14px 16px;border:2px solid var(--line);border-radius:14px;background:#fff;cursor:pointer;font-size:1.05rem;transition:.12s}
.q-opt:hover{border-color:#a5b4fc;background:#fafbff}
.q-opt.on{border-color:var(--p);background:var(--ps)}
.q-opt .ol{width:34px;height:34px;border-radius:50%;border:2px solid #cbd5e1;display:grid;place-items:center;font-weight:700;color:var(--mut);flex:none;transition:.12s}
.q-opt.on .ol{background:var(--p);border-color:var(--p);color:#fff}
.q-opt .rich{flex:1;min-width:0}
.q-opt .tick{margin-left:auto;opacity:0;color:var(--p)}.q-opt.on .tick{opacity:1}
.q-nav{display:flex;justify-content:space-between;align-items:center;margin-top:22px;gap:10px}
.room-side{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;position:sticky;top:84px}
.palette{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;max-height:50vh;overflow-y:auto;padding:3px}
.qb{aspect-ratio:1;border:2px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;font-weight:600;padding:0}
.qb.ans{background:var(--ok);border-color:var(--ok);color:#fff}
.qb.mk{border-color:var(--warn);background:var(--warns);color:#92400e}
.qb.ans.mk{background:var(--ok);color:#fff;box-shadow:0 0 0 2px #fff,0 0 0 4px var(--warn)}
.qb.cur{outline:3px solid #818cf8;outline-offset:1px}
.legend{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:.76rem;color:var(--mut);margin-top:14px}
.legend .lg{display:inline-block;width:12px;height:12px;border-radius:4px;border:2px solid var(--line);margin-right:4px;vertical-align:-2px}
.legend .lg.ans{background:var(--ok);border-color:var(--ok)}.legend .lg.mk{border-color:var(--warn);background:var(--warns)}
.room-overlay{position:fixed;inset:0;background:rgba(255,255,255,.92);z-index:400;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:var(--ink2)}

/* ---------- responsive ---------- */
@media(max-width:1000px){
  .g4{grid-template-columns:repeat(2,minmax(0,1fr))}.g3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .auth-wrap{grid-template-columns:1fr}.auth-side{display:none}.auth-mobile-logo{display:block}.auth-main{background:var(--bg);min-height:100vh}
  .auth-card{background:#fff;padding:26px 22px;border-radius:20px;border:1px solid var(--line);box-shadow:var(--sh2)}
  .room-body{grid-template-columns:1fr}
  .room-side{display:none}
  .room.pal-open .room-side{display:block;position:fixed;left:0;right:0;bottom:0;top:auto;z-index:90;border-radius:20px 20px 0 0;max-height:72vh;overflow-y:auto;box-shadow:0 -12px 40px rgba(15,23,42,.3)}
  .pal-toggle{display:inline-flex}
}
@media(max-width:900px){
  .sidebar{transform:translateX(-100%)}
  body.nav-open .sidebar{transform:none;box-shadow:var(--sh2)}
  body.nav-open .nav-shade{display:block;position:fixed;inset:0;background:rgba(15,23,42,.5);z-index:45}
  .main-col{margin-left:0}.topbar{display:flex}.content{padding:18px 14px}
  .public-shell .content{padding:18px 14px 40px}
  .split.g2{grid-template-columns:1fr}
}
@media(max-width:720px){
  body{font-size:15px}
  .tbl{min-width:0}
  .tbl thead{display:none}
  .tbl,.tbl tbody,.tbl tr,.tbl td{display:block;width:100%}
  .tbl tr{padding:10px 14px;border-bottom:1px solid var(--line)}.tbl tr:last-child{border-bottom:0}
  .tbl td{border:0;padding:5px 0;display:flex;justify-content:space-between;gap:14px;align-items:flex-start;text-align:right}
  .tbl td::before{content:attr(data-label);color:var(--mut);font-size:.8rem;flex:none;text-align:left}
  .tbl td[data-label=""]::before{display:none}
  .tbl td.actions{justify-content:flex-end}
  .tbl td>div{text-align:right}
  .tbl tbody tr:hover td{background:none}
}
@media(max-width:680px){
  .g2,.g3,.g4{grid-template-columns:1fr}
  .stats.g4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .info-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.info-i{padding:8px 10px}
  .stat{padding:12px;gap:10px}.stat-i{width:38px;height:38px}.stat-n{font-size:1.2rem}
  .hero{padding:26px 20px;border-radius:18px}.hero h1{font-size:1.5rem}
  .topnav-in{flex-wrap:wrap;gap:8px 12px;padding:8px 14px}
  .top-links{order:3;width:100%;margin:0;overflow-x:auto}
  .top-profile .nm{display:none}.top-profile{padding:3px}
  .qopts,.qtags,.qexp,.qstat-b{margin-left:0}
  .qopts{grid-template-columns:1fr}
  .mode-cards{grid-template-columns:1fr}
  .dl{grid-template-columns:1fr;gap:2px}.dl dt{margin-top:8px}
  .modal-b{padding:16px}.modal-h,.modal-f{padding-left:16px;padding-right:16px}
  .q-main{padding:16px;border-radius:16px}.q-text{font-size:1.08rem}.q-opt{padding:12px;font-size:1rem}
  .room-top{padding:8px 12px;gap:8px}.timer{font-size:1.05rem;min-width:92px;padding:6px 10px}
  .room-title{display:none}
  .room-top .btn{padding:8px 12px}
  .room-body{padding:12px 12px 30px}
  .page-head h1{font-size:1.35rem}
  .opt-edit{flex-wrap:wrap}.opt-letter{display:none}
  .result-hero{justify-content:center;text-align:center}
  .row-actions{justify-content:flex-end}
  .toasts{left:12px;right:12px;bottom:12px}
}