/* Pinnacle Online Test Platform */
:root {
  --ink: #1d1d1f;
  --ink-2: #4a4a4f;
  --ink-3: #7a7a80;
  --line: #dcdce0;
  --line-2: #ececef;
  --bg: #f4f4f2;
  --card: #ffffff;
  --brand: #7a1f2b;
  --brand-dark: #5c1520;
  --brand-soft: #f6eaec;
  --ok: #2e7d32;
  --ok-soft: #e8f3e9;
  --bad: #c62828;
  --bad-soft: #fbeaea;
  --mark: #6a1b9a;
  --mark-soft: #f2e8f7;
  --skip: #8a8a90;
  --warn: #a15c00;
  --warn-soft: #fff4e2;
  --radius: 8px;
  --shadow: 0 1px 2px rgba(0,0,0,.06), 0 1px 1px rgba(0,0,0,.04);
  font-family: "Segoe UI", "Noto Sans", "Noto Sans Bengali", Roboto, Arial, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { background: var(--bg); color: var(--ink); font-size: 15px; line-height: 1.5; -webkit-text-size-adjust: 100%; }
.bn, :lang(bn) { font-family: "Noto Sans Bengali", "Vrinda", "Shonar Bangla", "Nirmala UI", sans-serif; }
a { color: var(--brand); }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; }
h1 { font-size: 1.45rem; }
h2 { font-size: 1.15rem; }
h3 { font-size: 1rem; }
p { margin: 0 0 .75em; }
small, .muted { color: var(--ink-3); }
.hidden { display: none !important; }

/* top bar */
.topbar { background: var(--card); border-bottom: 3px solid var(--brand); }
.topbar-in { max-width: 1100px; margin: 0 auto; padding: 10px 16px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand-mark { width: 38px; height: 38px; border-radius: 6px; background: var(--brand); color: #fff; font-weight: 700; display: grid; place-items: center; font-size: 1.15rem; flex: none; }
.brand-name { font-weight: 700; font-size: .98rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.brand-sub { font-size: .78rem; color: var(--ink-3); }
.demo-banner { background: var(--warn-soft); color: var(--warn); font-size: .8rem; text-align: center; padding: 6px 12px; border-bottom: 1px solid #f0d9b5; }

.wrap { max-width: 1100px; margin: 0 auto; padding: 18px 16px 60px; }
.narrow { max-width: 720px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); margin-bottom: 16px; }
.card-h { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.card-h h2, .card-h h3 { margin: 0; }

/* buttons and inputs */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 6px; padding: 9px 14px; font-size: .92rem; font-weight: 600; cursor: pointer; text-decoration: none; line-height: 1.2; font-family: inherit; }
.btn:hover { background: #f7f7f7; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn-primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-ok { background: var(--ok); border-color: var(--ok); color: #fff; }
.btn-ok:hover { background: #256528; }
.btn-mark { background: var(--mark); border-color: var(--mark); color: #fff; }
.btn-danger { color: var(--bad); border-color: #e7b4b4; }
.btn-danger:hover { background: var(--bad-soft); }
.btn-sm { padding: 6px 10px; font-size: .82rem; }
.btn-block { width: 100%; }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; }

label { display: block; font-weight: 600; font-size: .88rem; margin-bottom: 4px; }
.field { margin-bottom: 14px; }
.hint { font-size: .8rem; color: var(--ink-3); margin-top: 3px; font-weight: 400; }
input[type=text], input[type=tel], input[type=email], input[type=password], input[type=number], select, textarea {
  width: 100%; padding: 9px 10px; border: 1px solid var(--line); border-radius: 6px; font-size: .95rem; font-family: inherit; background: #fff; color: var(--ink);
}
textarea { resize: vertical; min-height: 60px; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--brand-soft); border-color: var(--brand); }
.check { display: flex; gap: 8px; align-items: flex-start; font-weight: 400; font-size: .9rem; }
.check input { margin-top: 4px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.grid4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
@media (max-width: 700px) { .grid2, .grid3 { grid-template-columns: 1fr; } .grid4 { grid-template-columns: 1fr 1fr; } }

/* tables */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line-2); vertical-align: top; }
th { background: #fafafa; font-size: .8rem; text-transform: uppercase; letter-spacing: .02em; color: var(--ink-2); white-space: nowrap; }
td.num, th.num { text-align: right; white-space: nowrap; }

/* stats tiles */
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; }
.tile { border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; background: #fff; }
.tile-k { font-size: .76rem; color: var(--ink-3); text-transform: uppercase; letter-spacing: .03em; }
.tile-v { font-size: 1.45rem; font-weight: 700; margin-top: 2px; }
.tile-v small { font-size: .85rem; font-weight: 500; }
.tile.ok .tile-v { color: var(--ok); }
.tile.bad .tile-v { color: var(--bad); }

/* status pill */
.pill { display: inline-block; font-size: .74rem; font-weight: 700; padding: 2px 8px; border-radius: 20px; background: var(--line-2); color: var(--ink-2); text-transform: uppercase; letter-spacing: .03em; }
.pill.live { background: var(--ok-soft); color: var(--ok); }
.pill.closed { background: var(--bad-soft); color: var(--bad); }
.pill.draft { background: var(--warn-soft); color: var(--warn); }
.pill.ai { background: var(--mark-soft); color: var(--mark); }

/* bars */
.bars { display: flex; flex-direction: column; gap: 7px; }
.bar-row { display: grid; grid-template-columns: minmax(80px, 160px) 1fr 64px; gap: 10px; align-items: center; font-size: .86rem; }
.bar-label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--ink-2); }
.bar-track { background: var(--line-2); height: 12px; border-radius: 6px; overflow: hidden; }
.bar-fill { height: 100%; background: var(--brand); border-radius: 6px; }
.bar-fill.ok { background: var(--ok); }
.bar-fill.bad { background: var(--bad); }
.bar-fill.grey { background: #a9a9b0; }
.bar-fill.mark { background: var(--mark); }
.bar-val { text-align: right; font-variant-numeric: tabular-nums; font-weight: 600; }

/* histogram */
.hist { display: flex; align-items: flex-end; gap: 4px; height: 140px; padding-top: 6px; }
.hist-col { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; height: 100%; }
.hist-bar { width: 100%; background: var(--brand); border-radius: 3px 3px 0 0; min-height: 2px; }
.hist-n { font-size: .72rem; font-weight: 700; margin-bottom: 2px; }
.hist-x { display: flex; gap: 4px; }
.hist-x div { flex: 1; text-align: center; font-size: .66rem; color: var(--ink-3); }

/* toast */
#toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%) translateY(20px); background: #222; color: #fff; padding: 10px 16px; border-radius: 6px; font-size: .9rem; opacity: 0; pointer-events: none; transition: all .2s; z-index: 1000; max-width: 90vw; }
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
#toast.err { background: var(--bad); }

/* modal */
.modal-bg { position: fixed; inset: 0; background: rgba(0,0,0,.45); display: flex; align-items: center; justify-content: center; z-index: 500; padding: 16px; }
.modal { background: #fff; border-radius: var(--radius); max-width: 480px; width: 100%; padding: 20px; max-height: 90vh; overflow: auto; }
.modal h2 { margin-bottom: 12px; }

/* ===== EXAM SCREEN ===== */
.exam-body { background: #fff; height: 100vh; height: 100dvh; display: flex; flex-direction: column; overflow: hidden; }
.exam-top { background: var(--brand); color: #fff; padding: 8px 14px; display: flex; align-items: center; justify-content: space-between; gap: 10px; flex: none; }
.exam-title { font-weight: 700; font-size: .95rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.exam-tools { display: flex; align-items: center; gap: 8px; flex: none; }
.timer { background: #fff; color: var(--ink); font-weight: 700; font-variant-numeric: tabular-nums; padding: 5px 10px; border-radius: 5px; font-size: .95rem; min-width: 74px; text-align: center; }
.timer.low { background: #ffe1e1; color: var(--bad); }
.lang-sw { display: inline-flex; border: 1px solid rgba(255,255,255,.6); border-radius: 5px; overflow: hidden; }
.lang-sw button { background: transparent; color: #fff; border: 0; padding: 5px 9px; font-size: .82rem; font-weight: 600; cursor: pointer; font-family: inherit; }
.lang-sw button.on { background: #fff; color: var(--brand); }
.lang-sw.light { border-color: var(--line); }
.lang-sw.light button { color: var(--ink-2); }
.lang-sw.light button.on { background: var(--brand); color: #fff; }
.exam-sub { background: #f6f6f6; border-bottom: 1px solid var(--line); padding: 6px 14px; display: flex; justify-content: space-between; align-items: center; font-size: .82rem; gap: 8px; flex: none; }
.exam-main { flex: 1; display: flex; min-height: 0; }
.q-pane { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.q-scroll { flex: 1; overflow-y: auto; padding: 16px 18px 24px; -webkit-overflow-scrolling: touch; }
.q-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; border-bottom: 1px solid var(--line-2); padding-bottom: 8px; margin-bottom: 12px; }
.q-no { font-weight: 700; }
.q-marks { font-size: .78rem; color: var(--ink-3); }
.q-text { font-size: 1.02rem; margin-bottom: 16px; white-space: normal; }
.opts { display: flex; flex-direction: column; gap: 9px; }
.opt { display: flex; gap: 10px; align-items: flex-start; border: 1px solid var(--line); border-radius: 7px; padding: 11px 12px; cursor: pointer; background: #fff; transition: background .12s, border-color .12s; }
.opt:hover { background: #fafafa; }
.opt.sel { border-color: var(--brand); background: var(--brand-soft); }
.opt-l { width: 26px; height: 26px; border-radius: 50%; border: 1.5px solid var(--ink-3); display: grid; place-items: center; font-weight: 700; font-size: .82rem; flex: none; }
.opt.sel .opt-l { background: var(--brand); border-color: var(--brand); color: #fff; }
.opt-t { padding-top: 2px; }
.q-actions { border-top: 1px solid var(--line); padding: 10px 14px; display: flex; gap: 8px; flex-wrap: wrap; justify-content: space-between; flex: none; background: #fafafa; }
.q-actions .btn-row { flex-wrap: nowrap; }

.palette { width: 300px; border-left: 1px solid var(--line); display: flex; flex-direction: column; background: #fbfbfb; flex: none; }
.pal-user { padding: 12px 14px; border-bottom: 1px solid var(--line); font-size: .86rem; }
.pal-legend { padding: 10px 14px; display: grid; grid-template-columns: 1fr 1fr; gap: 6px; font-size: .74rem; border-bottom: 1px solid var(--line); }
.pal-legend span { display: flex; align-items: center; gap: 6px; }
.pal-sec { padding: 8px 14px 0; font-weight: 700; font-size: .8rem; color: var(--ink-2); }
.pal-grid { padding: 10px 14px; display: grid; grid-template-columns: repeat(5, 1fr); gap: 7px; overflow-y: auto; flex: 1; align-content: start; }
.pq { height: 36px; border-radius: 5px; border: 1px solid var(--line); background: #fff; font-weight: 700; font-size: .82rem; cursor: pointer; font-family: inherit; color: var(--ink); position: relative; }
.pq.nv { background: #fff; }
.pq.na { background: var(--bad); border-color: var(--bad); color: #fff; }
.pq.an { background: var(--ok); border-color: var(--ok); color: #fff; }
.pq.mk { background: var(--mark); border-color: var(--mark); color: #fff; border-radius: 50%; }
.pq.am { background: var(--mark); border-color: var(--mark); color: #fff; border-radius: 50%; }
.pq.am::after { content: ""; position: absolute; right: 2px; bottom: 2px; width: 9px; height: 9px; background: #4cd964; border-radius: 50%; border: 1.5px solid #fff; }
.pq.cur { outline: 2px solid var(--ink); outline-offset: 1px; }
.dot { width: 18px; height: 18px; border-radius: 4px; border: 1px solid var(--line); display: inline-block; flex: none; }
.dot.an { background: var(--ok); border-color: var(--ok); }
.dot.na { background: var(--bad); border-color: var(--bad); }
.dot.mk { background: var(--mark); border-color: var(--mark); border-radius: 50%; }
.dot.am { background: var(--mark); border-color: var(--mark); border-radius: 50%; box-shadow: inset -4px -4px 0 #4cd964; }
.pal-foot { padding: 12px 14px; border-top: 1px solid var(--line); }
.pal-close { display: none; }
.pal-toggle { display: none; }

@media (max-width: 860px) {
  .palette { position: fixed; top: 0; right: 0; bottom: 0; width: min(320px, 88vw); z-index: 300; transform: translateX(105%); transition: transform .2s; box-shadow: -4px 0 18px rgba(0,0,0,.18); }
  .palette.open { transform: translateX(0); }
  .pal-close { display: inline-flex; }
  .pal-toggle { display: inline-flex; }
  .q-scroll { padding: 14px 14px 20px; }
  .q-actions { padding: 8px 10px; }
  .q-actions .btn { padding: 9px 10px; font-size: .84rem; }
  .exam-title { font-size: .86rem; }
}
.pal-shade { display: none; }
@media (max-width: 860px) { .pal-shade.show { display: block; position: fixed; inset: 0; background: rgba(0,0,0,.35); z-index: 250; } }

/* instructions page */
.instr ol { padding-left: 20px; margin: 0 0 1em; }
.instr li { margin-bottom: 6px; }
.legend-inline { display: flex; flex-wrap: wrap; gap: 14px; font-size: .84rem; margin: 6px 0 12px; }
.legend-inline span { display: flex; align-items: center; gap: 6px; }

/* result page */
.score-hero { text-align: center; padding: 22px 16px; }
.score-big { font-size: 2.6rem; font-weight: 800; line-height: 1; }
.score-big small { font-size: 1.1rem; color: var(--ink-3); font-weight: 600; }
.rank-box { display: flex; justify-content: center; gap: 28px; flex-wrap: wrap; margin-top: 14px; }
.rank-box div { text-align: center; }
.rank-box b { display: block; font-size: 1.5rem; }
.sol { border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; margin-bottom: 10px; background: #fff; }
.sol-h { display: flex; justify-content: space-between; gap: 8px; margin-bottom: 8px; font-size: .85rem; }
.sol .opt { cursor: default; padding: 8px 10px; }
.sol .opt.right { border-color: var(--ok); background: var(--ok-soft); }
.sol .opt.right .opt-l { background: var(--ok); border-color: var(--ok); color: #fff; }
.sol .opt.yourwrong { border-color: var(--bad); background: var(--bad-soft); }
.sol .opt.yourwrong .opt-l { background: var(--bad); border-color: var(--bad); color: #fff; }
.expl { margin-top: 10px; padding: 10px 12px; background: #fafafa; border-left: 3px solid var(--ink-3); font-size: .9rem; }
.tag { font-size: .72rem; font-weight: 700; padding: 2px 7px; border-radius: 4px; }
.tag.c { background: var(--ok-soft); color: var(--ok); }
.tag.w { background: var(--bad-soft); color: var(--bad); }
.tag.s { background: var(--line-2); color: var(--ink-2); }
.filters { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
.filters .btn.on { background: var(--ink); color: #fff; border-color: var(--ink); }
.ai-report h3 { margin-top: 14px; }
.ai-report ul { margin: 0 0 .8em; padding-left: 20px; }
.ai-report li { margin-bottom: 4px; }
.cmp-legend { display: flex; gap: 14px; font-size: .78rem; margin-bottom: 8px; flex-wrap: wrap; }
.cmp-legend span { display: flex; align-items: center; gap: 5px; }
.sw { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }
.cmp-group { margin-bottom: 12px; }
.cmp-title { font-size: .86rem; font-weight: 700; margin-bottom: 4px; }

/* admin */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 16px; overflow-x: auto; }
.tabs button { background: none; border: 0; border-bottom: 3px solid transparent; padding: 10px 14px; font-weight: 600; font-size: .92rem; cursor: pointer; color: var(--ink-2); white-space: nowrap; font-family: inherit; }
.tabs button.on { color: var(--brand); border-bottom-color: var(--brand); }
.test-item { display: flex; justify-content: space-between; gap: 12px; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--line-2); flex-wrap: wrap; }
.test-item:last-child { border-bottom: 0; }
.test-item h3 { margin: 0 0 3px; }
.qedit { border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; margin-bottom: 12px; background: #fff; }
.qedit.flag { border-color: #d6b3e6; background: #fcf8fe; }
.qedit.nokey { border-color: #eec08a; background: #fffaf2; }
.qedit-h { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 10px; flex-wrap: wrap; }
.opt-edit { display: grid; grid-template-columns: 34px 1fr 1fr; gap: 6px; align-items: center; margin-bottom: 6px; }
.opt-edit input[type=radio] { width: 18px; height: 18px; margin: 0 auto; }
@media (max-width: 700px) { .opt-edit { grid-template-columns: 30px 1fr; } .opt-edit .bn-in { grid-column: 2; } }
.drop { border: 2px dashed var(--line); border-radius: var(--radius); padding: 26px 16px; text-align: center; background: #fafafa; cursor: pointer; }
.drop.over { border-color: var(--brand); background: var(--brand-soft); }
.progress { height: 8px; background: var(--line-2); border-radius: 4px; overflow: hidden; margin: 8px 0; }
.progress div { height: 100%; background: var(--brand); width: 0; transition: width .3s; }
.log { font-family: Consolas, monospace; font-size: .8rem; background: #f7f7f7; border: 1px solid var(--line-2); border-radius: 6px; padding: 8px 10px; max-height: 140px; overflow: auto; white-space: pre-wrap; }
.share-box { display: flex; gap: 6px; }
.share-box input { flex: 1; min-width: 0; font-size: .85rem; }
.sticky-save { position: sticky; top: 0; background: rgba(255,255,255,.97); padding: 10px 0; margin-bottom: 12px; border-bottom: 1px solid var(--line); display: flex; gap: 8px; justify-content: flex-end; flex-wrap: wrap; z-index: 20; }
.empty { text-align: center; color: var(--ink-3); padding: 30px 10px; }
.footer { text-align: center; font-size: .78rem; color: var(--ink-3); padding: 20px 10px; }
.spinner { width: 22px; height: 22px; border: 3px solid var(--line); border-top-color: var(--brand); border-radius: 50%; animation: spin 0.8s linear infinite; display: inline-block; vertical-align: middle; }
@keyframes spin { to { transform: rotate(360deg); } }
.center-load { padding: 60px 10px; text-align: center; color: var(--ink-3); }