:root {
  --bg: #f3f4f6; --surface: #fff; --border: #d9dde3; --text: #1f2933; --muted: #616e7c;
  --accent: #1f4e8c; --accent-dark: #173b6b; --accent-soft: #e6eef9;
  --green: #1f7a4d; --green-soft: #e3f3ea; --amber: #9a6700; --amber-soft: #fff4d6; --red: #b42318; --red-soft: #fde8e6;
  --radius: 8px; --shadow: 0 1px 2px rgba(16,24,40,.06), 0 1px 3px rgba(16,24,40,.1);
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--bg); color: var(--text); font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif; }
header { background: var(--surface); border-bottom: 1px solid var(--border); padding: 10px 24px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
header h1 { margin: 0; font-size: 17px; font-weight: 600; }
header .brand { color: var(--accent); }
header .spacer { flex: 1; }
header .who { color: var(--muted); font-size: 13px; }
nav.tabs { display: flex; gap: 4px; flex-wrap: wrap; }
nav.tabs button { border: 0; background: transparent; padding: 6px 12px; border-radius: 6px; font-weight: 600; color: var(--muted); cursor: pointer; font: inherit; font-weight: 600; }
nav.tabs button.active { background: var(--accent-soft); color: var(--accent-dark); }
main { max-width: 1320px; margin: 0 auto; padding: 20px 16px 48px; display: grid; gap: 20px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.card-h { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--border); font-weight: 600; flex-wrap: wrap; }
.card-h small { color: var(--muted); font-weight: 400; }
.card-b { padding: 14px 16px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { padding: 8px 10px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .4px; background: #fafbfc; }
td.wrap { white-space: normal; min-width: 220px; }
tr.details td { background: #fafbfc; white-space: normal; padding: 12px 16px 16px; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; background: #eef0f3; padding: 1px 5px; border-radius: 4px; }
small.muted, .muted { color: var(--muted); font-size: 12px; }
.badge { display: inline-block; font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 999px; border: 1px solid; text-transform: uppercase; letter-spacing: .3px; }
.b-green { background: var(--green-soft); color: var(--green); border-color: #a9dcbf; }
.b-amber { background: var(--amber-soft); color: var(--amber); border-color: #f0d48a; }
.b-red { background: var(--red-soft); color: var(--red); border-color: #f2b3ad; }
.b-blue { background: var(--accent-soft); color: var(--accent-dark); border-color: #b9cdee; }
.b-grey { background: #eef0f3; color: var(--muted); border-color: var(--border); }
.tag { font-size: 10px; color: var(--muted); text-transform: uppercase; letter-spacing: .3px; display: block; }
.actions { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
td.actions { display: table-cell; white-space: normal; min-width: 280px; }
td.actions button { margin: 0 4px 4px 0; }
.stack { margin-top: 20px; }
.stack-sm { margin-top: 10px; }
.label-input { width: 240px; }
form.actions .label-input { width: 240px; }
button { font: inherit; font-size: 12px; font-weight: 600; padding: 5px 10px; border-radius: 6px; border: 1px solid var(--border); background: var(--surface); color: var(--text); cursor: pointer; }
button:hover:not(:disabled) { background: #f4f6f9; }
button:disabled { opacity: .5; cursor: not-allowed; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover:not(:disabled) { background: var(--accent-dark); }
button.danger { color: var(--red); border-color: #f2b3ad; }
button.danger:hover:not(:disabled) { background: var(--red-soft); }
button.link { border: 0; background: none; color: var(--accent-dark); text-decoration: underline; padding: 0; font-weight: 500; }
.code-box { display: inline-flex; align-items: center; gap: 10px; background: var(--accent-soft); border: 1px solid #b9cdee; border-radius: 6px; padding: 6px 12px; margin-top: 8px; }
.code-box .code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 22px; font-weight: 700; letter-spacing: 3px; color: var(--accent-dark); }
.code-box .ttl { color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.code-box.expired { background: var(--red-soft); border-color: #f2b3ad; } .code-box.expired .code { color: var(--red); text-decoration: line-through; }
.events { list-style: none; margin: 8px 0 0; padding: 0; max-height: 340px; overflow: auto; border: 1px solid var(--border); border-radius: 6px; background: var(--surface); }
.events li { display: grid; grid-template-columns: 82px 70px 1fr; gap: 10px; padding: 6px 10px; border-bottom: 1px solid #eef0f3; font-size: 12px; align-items: baseline; }
.events li:last-child { border-bottom: 0; }
.events .t { color: var(--muted); font-variant-numeric: tabular-nums; }
.events .type { font-weight: 600; }
.events .meta { color: var(--muted); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 11px; word-break: break-all; }
.sev-high { color: var(--red); } .sev-medium { color: var(--amber); } .sev-low { color: var(--accent-dark); } .sev-info { color: var(--muted); }
.empty { padding: 28px; text-align: center; color: var(--muted); }
form.grid { display: grid; gap: 10px; }
form.grid label, .field { display: flex; flex-direction: column; gap: 4px; font-size: 13px; }
form.grid label.row { flex-direction: row; align-items: center; justify-content: space-between; gap: 10px; }
form.grid .cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 10px; }
input[type=text], input[type=number], input[type=password], input[type=datetime-local], select, textarea { font: inherit; font-size: 13px; padding: 6px 8px; border: 1px solid var(--border); border-radius: 6px; width: 100%; background: #fff; }
textarea { min-height: 70px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; }
input[type=checkbox] { width: 16px; height: 16px; accent-color: var(--accent); }
.group { font-size: 11px; text-transform: uppercase; letter-spacing: .4px; color: var(--muted); font-weight: 600; margin-top: 8px; }
.buttons { display: flex; gap: 8px; margin-top: 6px; flex-wrap: wrap; }
.status { font-size: 12px; color: var(--muted); min-height: 18px; }
.status.ok { color: var(--green); } .status.err { color: var(--red); }
.hint { padding: 10px 16px; font-size: 12px; color: var(--muted); border-top: 1px solid var(--border); }
.two { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, 480px); gap: 20px; }
@media (max-width: 1000px) { .two { grid-template-columns: 1fr; } }
.login { max-width: 380px; margin: 80px auto; }
.qblock, .lrow { border: 1px solid var(--border); border-radius: 6px; padding: 10px; margin-bottom: 8px; display: grid; gap: 6px; background: #fafbfc; }
.lrow { grid-template-columns: 1fr 2fr auto; align-items: end; }
.qblock .qhead { display: flex; justify-content: space-between; align-items: center; font-weight: 600; font-size: 12px; color: var(--muted); }
.toast { position: fixed; bottom: 16px; right: 16px; background: #1f2933; color: #fff; padding: 10px 14px; border-radius: 6px; font-size: 13px; z-index: 60; box-shadow: var(--shadow); }
.toast.err { background: var(--red); }
.kv { display: grid; grid-template-columns: max-content 1fr; gap: 4px 14px; font-size: 12px; }
.kv dt { color: var(--muted); } .kv dd { margin: 0; word-break: break-all; }
.token-once { background: var(--amber-soft); border: 1px solid #f0d48a; border-radius: 6px; padding: 10px 12px; margin-top: 8px; font-size: 13px; }
.token-once code { font-size: 13px; background: #fff; }

/* ---- Information buttons on exam rules ---- */
button.info {
  display: inline-grid; place-items: center; width: 17px; height: 17px; margin-left: 6px; padding: 0;
  border: 1px solid var(--accent); border-radius: 50%; background: var(--surface); color: var(--accent);
  font: italic 700 11px/1 Georgia, "Times New Roman", serif; cursor: pointer; vertical-align: 1px;
}
button.info:hover, button.info[aria-expanded="true"] { background: var(--accent); color: #fff; }
button.info:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.info-pop {
  position: absolute; z-index: 50; width: min(380px, calc(100vw - 24px));
  background: var(--surface); color: var(--text); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(16,24,40,.18); padding: 12px 14px; font-size: 13px; line-height: 1.55;
}
.info-pop-h { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; margin-bottom: 6px; }
.info-pop p { margin: 0 0 8px; }
.info-pop p:last-child { margin-bottom: 0; }
.info-pop ul { margin: 0 0 8px; padding-left: 18px; }
.info-pop li { margin-bottom: 3px; }
.info-pop .tip { background: var(--accent-soft); border-radius: 6px; padding: 6px 8px; }
.info-pop .warn { background: var(--amber-soft); border-radius: 6px; padding: 6px 8px; }
button.info-close { border: 0; background: transparent; font-size: 18px; line-height: 1; color: var(--muted); cursor: pointer; padding: 0 2px; }
button.info-close:hover { color: var(--text); }

/* ---- Question bank (CONTRACT §13) ---- */
section.bank { display: grid; grid-template-columns: minmax(230px, 280px) minmax(0, 1fr); gap: 20px; align-items: start; }
@media (max-width: 1000px) { section.bank { grid-template-columns: 1fr; } }
.bank-main { display: grid; gap: 20px; align-content: start; min-width: 0; }
/* Without this a wide table stretches its card and the whole page scrolls sideways. */
.bank-main > .card { min-width: 0; }
section.bank .table-wrap { max-width: 100%; }
section.bank .field > label { display: block; flex-direction: row; margin-bottom: 2px; font-size: 13px; }
section.bank label.tf, section.bank label.check { flex-direction: row; align-items: center; }
.subject-tree { padding: 6px 8px; max-height: 460px; overflow: auto; }
.subj-row { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.subj-row.topic { padding-left: 14px; }
.subj-name { flex: 1; min-width: 0; display: flex; justify-content: space-between; gap: 8px; text-align: left; border: 0; background: transparent; padding: 5px 8px; border-radius: 6px; font-size: 13px; }
.subj-name .n { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.subj-name .c { color: var(--muted); font-variant-numeric: tabular-nums; }
.subj-name.on { background: var(--accent-soft); color: var(--accent-dark); }
.subj-row.topic .subj-name { font-weight: 500; }
.subj-acts { display: flex; gap: 4px; width: 100%; padding: 2px 8px 6px; }
.subj-acts button { font-size: 11px; padding: 3px 6px; }
.bank-filters { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; align-items: end; border-bottom: 1px solid var(--border); }
.bank-filters .buttons { margin-top: 0; }
.bank-pager { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; border-top: 1px solid var(--border); }
.bank-pager .status { min-height: 0; }
td.stem { min-width: 240px; max-width: 420px; }
td.tagcell { min-width: 110px; }
td.tagcell .badge { margin: 0 3px 3px 0; text-transform: none; letter-spacing: 0; }
.notice { background: var(--accent-soft); border: 1px solid #b9cdee; border-radius: 6px; padding: 8px 10px; font-size: 13px; line-height: 1.5; }
.notice.warn-notice { background: var(--amber-soft); border-color: #f0d48a; }
.notice p { margin: 6px 0 0; }
.prob { color: var(--red); }
/* The import preview has many columns: keep the "Check" message on screen. */
#impPreview td.wrap { min-width: 100px; }
#impPreview table td:last-child, #impPreview table th:last-child { min-width: 150px; }
.opt-list { display: grid; gap: 6px; }
.opt-row { display: grid; grid-template-columns: 72px 18px minmax(0, 1fr) auto; gap: 8px; align-items: center; }
.opt-num { font-size: 12px; color: var(--muted); font-weight: 600; margin: 0; }
.tf-row { display: flex; gap: 20px; }
section.bank label.tf { font-size: 14px; font-weight: 600; gap: 6px; }
#bankHistory { border-top: 1px solid var(--border); }


/* Exam rules, shown on the Common settings tab and in the exam editor (POLICY_FIELDS). */
.pfields { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 10px 18px; }
.pfield { display: flex; flex-direction: column; gap: 3px; }
.pfield > label { font-size: 13px; }
.pfield .pdefault { font-size: 11px; }
.pfield.locked-field > label { color: var(--muted); }
.pfield input:disabled, .pfield select:disabled, .pfield textarea:disabled { background: #f3f4f6; color: var(--muted); cursor: not-allowed; }
.pfield .plockbox { font-size: 11px; }
.badge.pchip, .badge.plock { text-transform: none; letter-spacing: 0; }
button.linkish { background: none; border: 0; padding: 0; color: var(--accent); font-size: 12px; text-decoration: underline; cursor: pointer; }

/* Marking */
.marking { display: grid; grid-template-columns: minmax(300px, 420px) minmax(0, 1fr); gap: 20px; align-items: start; }
@media (max-width: 1000px) { .marking { grid-template-columns: 1fr; } }
.mark-filters { display: flex; flex-wrap: wrap; gap: 12px 18px; align-items: center; border-bottom: 1px solid var(--border); }
.mark-filters label { display: flex; align-items: center; gap: 6px; font-size: 13px; }
#markRows tr { cursor: pointer; }
#markRows tr:hover td { background: #f7f9fc; }
#markRows tr.sel td { background: var(--accent-soft); }
#markRows td.who b { display: block; font-weight: 600; }
.mark-sum { display: flex; flex-wrap: wrap; gap: 10px 22px; align-items: baseline; padding-bottom: 14px; border-bottom: 1px solid var(--border); margin-bottom: 14px; }
.mark-sum .total { font-size: 22px; font-weight: 700; font-variant-numeric: tabular-nums; }
.mark-sum .total small { font-size: 13px; font-weight: 400; color: var(--muted); }
.mark-tools { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 0 0 14px; font-size: 13px; }
.mq { border: 1px solid var(--border); border-radius: var(--radius); margin: 0 0 14px; background: var(--surface); }
.mq.pending { border-color: #f0d48a; box-shadow: inset 3px 0 0 var(--amber); }
.mq-h { display: flex; flex-wrap: wrap; gap: 6px 10px; align-items: center; padding: 10px 14px; border-bottom: 1px solid var(--border); font-size: 12px; color: var(--muted); }
.mq-h b { color: var(--text); font-size: 13px; }
.mq-h .spacer { flex: 1; }
.mq-b { padding: 12px 14px; display: grid; gap: 10px; }
.mq-q { font-size: 15px; font-weight: 600; line-height: 1.45; white-space: pre-wrap; }
.mq-label { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .4px; color: var(--muted); }
.mq-answer { white-space: pre-wrap; background: #fafbfc; border: 1px solid var(--border); border-radius: 6px; padding: 10px 12px; font-size: 14px; line-height: 1.6; max-height: 420px; overflow: auto; }
.mq-answer.empty { color: var(--muted); font-style: italic; }
.mq-opts { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.mq-opts li { display: flex; gap: 8px; align-items: baseline; padding: 4px 8px; border-radius: 5px; font-size: 13px; }
.mq-opts li.picked { background: var(--accent-soft); }
.mq-opts li .mk { width: 16px; flex: none; font-weight: 700; }
.mq-opts li.right .mk { color: var(--green); }
.mq-opts li.wrongpick .mk { color: var(--red); }
.mq-key { font-size: 12px; color: var(--muted); }
.mq-mark { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; padding-top: 10px; border-top: 1px dashed var(--border); }
.mq-mark input[type=number] { width: 90px; font: inherit; font-size: 15px; font-variant-numeric: tabular-nums; padding: 5px 8px; }
.mq-mark .of { color: var(--muted); }
.mq-mark .row { display: inline-flex; align-items: center; gap: 8px; flex-wrap: wrap; }

/* Lobbies */
.lobby-link { border-bottom: 1px solid var(--border); display: grid; gap: 10px; }
.lobby-link .muted { margin: 0; }
.lobby-link-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.lobby-link-row code { white-space: normal; word-break: break-all; font-size: 12px; padding: 6px 8px; flex: 1 1 260px; }
.lobby-qr svg { display: block; border: 1px solid var(--border); border-radius: 6px; }
.lobby-item-ed { border: 1px solid var(--border); border-radius: 6px; padding: 10px 12px; margin-bottom: 8px; display: grid; gap: 8px; }
.lobby-item-ed .row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.lobby-item-ed .row > label { flex: 1 1 200px; }
.lobby-item-ed textarea { min-height: 48px; }