/* QuizTest — shared styles for the public dashboard, the exam player and the admin dashboard. */
:root {
  --bg: #f5f6fa; --panel: #fff; --panel2: #f0f2f7; --text: #1b2030; --muted: #667089; --line: #e1e5ee;
  --accent: #4f46e5; --accent-ink: #fff; --accent-soft: #ecebff;
  --ok: #157f3c; --ok-bg: #e6f6ec; --bad: #c03a12; --bad-bg: #fdece5; --warn: #9a6400; --warn-bg: #fdf4dc;
  --radius: 10px; --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 2px 6px rgba(16, 24, 40, .06);
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1220; --panel: #161b2b; --panel2: #1d2335; --text: #e5e8f1; --muted: #98a1b7; --line: #2a3148;
    --accent: #8f8cff; --accent-ink: #0e1220; --accent-soft: #252650;
    --ok: #4ade80; --ok-bg: #13301f; --bad: #fb8b5b; --bad-bg: #3a2016; --warn: #f5c542; --warn-bg: #352c0f;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3); color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .4em; }
h1 { font-size: 1.5rem; } h2 { font-size: 1.15rem; } h3 { font-size: 1.02rem; }
p { margin: .3em 0; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.hidden { display: none !important; }
code, .mono { font-family: var(--mono); font-size: .9em; }

/* top bar */
.top { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 14px; padding: 10px 18px;
  background: color-mix(in srgb, var(--panel) 92%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.brand { font-weight: 750; font-size: 1.1rem; color: var(--text); letter-spacing: -.01em; display: flex; align-items: center; gap: 8px; }
.brand:hover { text-decoration: none; }
.brand .logo { width: 26px; height: 26px; border-radius: 7px; background: var(--accent); color: var(--accent-ink);
  display: grid; place-items: center; font-size: .8rem; font-weight: 800; }
.top .sub { color: var(--muted); font-size: .9rem; }
.top .spacer { flex: 1; }
.top nav { display: flex; gap: 4px; }
.top nav a { padding: 6px 10px; border-radius: 8px; color: var(--muted); font-weight: 550; }
.top nav a.on, .top nav a:hover { background: var(--panel2); color: var(--text); text-decoration: none; }
main { max-width: 1180px; margin: 0 auto; padding: 18px; }
main.narrow { max-width: 820px; }

/* controls */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--panel); color: var(--text); font: inherit; font-size: .9rem; font-weight: 550; cursor: pointer; white-space: nowrap; line-height: 1.2; }
.btn:hover { border-color: var(--accent); text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.danger { color: var(--bad); }
.btn.danger:hover { border-color: var(--bad); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.ghost:hover { background: var(--panel2); }
.btn.sm { padding: 4px 8px; font-size: .82rem; }
.btn:disabled { opacity: .5; cursor: default; filter: none; }
input, select, textarea { font: inherit; color: var(--text); background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 7px 10px; min-width: 0; }
input:focus, select:focus, textarea:focus { outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent); outline-offset: 0; border-color: var(--accent); }
textarea { resize: vertical; line-height: 1.45; }
label.check { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; user-select: none; }
label.check input { width: 16px; height: 16px; accent-color: var(--accent); }
.field { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.field > span { font-size: .78rem; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .03em; }
details > summary { cursor: pointer; color: var(--muted); font-weight: 550; font-size: .9rem; user-select: none; }
details[open] > summary { margin-bottom: 8px; }

.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px; }
.badge { display: inline-block; padding: 1px 8px; border-radius: 999px; background: var(--panel2); color: var(--muted); font-size: .76rem; font-weight: 650; white-space: nowrap; }
.badge.lvl { background: var(--accent-soft); color: var(--accent); }
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.warn { background: var(--warn-bg); color: var(--warn); }
.badge.bad { background: var(--bad-bg); color: var(--bad); }
.badges { display: flex; flex-wrap: wrap; gap: 5px; }
.toast { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 9px 16px;
  border-radius: 9px; z-index: 100; font-weight: 550; box-shadow: var(--shadow); }
.toast.bad { background: var(--bad); color: #fff; }
.empty { text-align: center; color: var(--muted); padding: 40px 10px; }

/* public dashboard */
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 14px; }
.toolbar input[type=search] { flex: 1 1 240px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; }
.ecard { display: flex; flex-direction: column; gap: 8px; }
.ecard h3 { margin: 0; font-size: 1.05rem; }
.ecard h3 a { color: var(--text); }
.ecard .kind { color: var(--muted); font-size: .84rem; }
.ecard .instr { color: var(--muted); font-size: .88rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.ecard .actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 6px; align-items: center; }
.files { display: inline-flex; gap: 2px; align-items: center; font-size: .82rem; }
.files a { padding: 3px 7px; border-radius: 6px; color: var(--muted); font-weight: 600; }
.files a:hover { background: var(--panel2); color: var(--text); text-decoration: none; }

/* exam player */
.player { max-width: 780px; }
.hero h1 { font-size: 1.45rem; }
.hero .instr-list { margin: 10px 0; padding-left: 0; list-style: none; }
.hero .instr-list li { padding: 6px 10px; background: var(--panel2); border-radius: 8px; margin-bottom: 6px; font-size: .92rem; }
.start-actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 8px; }
.start-actions .btn { padding: 11px 16px; font-size: 1rem; }
.progress { height: 6px; background: var(--panel2); border-radius: 99px; overflow: hidden; }
.progress > div { height: 100%; background: var(--accent); transition: width .25s; }
.qhead { display: flex; justify-content: space-between; align-items: center; gap: 8px; font-size: .86rem; color: var(--muted); margin: 10px 0 6px; }
.instr { font-size: .9rem; color: var(--muted); background: var(--panel2); border-radius: 8px; padding: 6px 10px; margin: 6px 0 10px; }
.sec-title { margin: 22px 0 6px; }
.q { padding: 12px 0; border-top: 1px solid var(--line); }
.q:first-of-type { border-top: 0; }
.qcard .q { border-top: 0; padding: 4px 0; }
.q .prompt { font-size: 1.08rem; line-height: 1.75; }
.qcard .q .prompt { font-size: 1.22rem; }
.q .num { font-weight: 700; color: var(--muted); margin-right: 6px; font-size: .95rem; }
.gap { display: inline-block; min-width: 3.2em; border-bottom: 2px solid var(--muted); text-align: center; padding: 0 4px; line-height: 1.3; color: var(--accent); font-weight: 650; }
.gap.filled { border-bottom-color: var(--accent); }
.gap-in { width: 7.5em; padding: 2px 6px; border-radius: 6px; border-width: 0 0 2px; border-color: var(--muted); background: var(--panel2); text-align: center; font-weight: 600; font-size: .98em; }
.gap-in.ok, .open-in.ok { border-color: var(--ok); background: var(--ok-bg); }
.gap-in.bad, .open-in.bad { border-color: var(--bad); background: var(--bad-bg); }
.open-in { width: 100%; margin-top: 6px; }
.hint { color: var(--muted); font-style: italic; font-size: .92rem; margin-top: 2px; }
.hide-hints .hint { display: none; }
.opts { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.opt { padding: 8px 14px; border-radius: 9px; border: 1.5px solid var(--line); background: var(--panel); color: var(--text); font: inherit; font-weight: 550; cursor: pointer; }
.opt b { color: var(--muted); margin-right: 5px; font-weight: 700; }
.opt:hover:not(:disabled) { border-color: var(--accent); }
.opt.sel { border-color: var(--accent); background: var(--accent-soft); }
.opt.ok { border-color: var(--ok); background: var(--ok-bg); color: var(--ok); }
.opt.bad { border-color: var(--bad); background: var(--bad-bg); color: var(--bad); }
.opt:disabled { cursor: default; }
.feedback { margin-top: 8px; font-weight: 600; font-size: .95rem; }
.feedback.ok { color: var(--ok); } .feedback.bad { color: var(--bad); } .feedback.na { color: var(--muted); }
.feedback .expl { font-weight: 400; color: var(--muted); display: block; }
.q.res-correct .num { color: var(--ok); } .q.res-wrong .num, .q.res-partial .num { color: var(--bad); }
.bank { display: flex; flex-wrap: wrap; gap: 6px; padding: 8px 10px; border: 1.5px dashed var(--line); border-radius: 9px; margin: 6px 0 10px; }
.chip { padding: 3px 10px; border-radius: 99px; background: var(--panel2); border: 1px solid var(--line); font: inherit; font-size: .9rem; font-weight: 600; color: var(--text); cursor: pointer; }
.chip.used { opacity: .45; text-decoration: line-through; }
.navrow { display: flex; justify-content: space-between; gap: 8px; margin-top: 16px; align-items: center; }
.sticky-bar { position: sticky; bottom: 0; background: color-mix(in srgb, var(--panel) 94%, transparent); backdrop-filter: blur(8px);
  border-top: 1px solid var(--line); padding: 10px 0; margin-top: 14px; display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.scorebox { text-align: center; padding: 22px 16px; }
.scorebox .big { font-size: 3rem; font-weight: 800; letter-spacing: -.03em; line-height: 1; }
.scorebox .big.good { color: var(--ok); } .scorebox .big.mid { color: var(--warn); } .scorebox .big.low { color: var(--bad); }
.review { margin-top: 14px; text-align: left; }
.review .row { display: grid; grid-template-columns: 26px 1fr; gap: 6px; padding: 7px 0; border-top: 1px solid var(--line); font-size: .93rem; }
.review .row .mark { font-weight: 800; }
.review .row .mark.ok { color: var(--ok); } .review .row .mark.bad { color: var(--bad); } .review .row .mark.na { color: var(--muted); }
.review s { color: var(--bad); }
.review .right { color: var(--ok); font-weight: 650; }
.kbd { font-family: var(--mono); font-size: .75rem; border: 1px solid var(--line); border-radius: 4px; padding: 0 4px; color: var(--muted); }

/* admin */
.login { max-width: 360px; margin: 12vh auto; }
.login form { display: flex; flex-direction: column; gap: 10px; }
table.list { width: 100%; border-collapse: collapse; font-size: .9rem; }
table.list th { text-align: left; font-size: .74rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); padding: 8px; border-bottom: 1px solid var(--line); }
table.list td { padding: 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
table.list tr:hover td { background: var(--panel2); }
table.list .title a { color: var(--text); font-weight: 650; }
table.list .acts { white-space: nowrap; text-align: right; }
.tablewrap { overflow-x: auto; }
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; align-items: start; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } }
.paste { width: 100%; min-height: 420px; font-family: var(--mono); font-size: .86rem; }
.row { display: flex; flex-wrap: wrap; gap: 10px; align-items: end; }
.row > .field { flex: 1 1 150px; }
.row > .field.wide { flex: 3 1 300px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0; }
.warnings { margin: 8px 0; padding: 0; list-style: none; }
.warnings li { background: var(--warn-bg); color: var(--warn); padding: 5px 10px; border-radius: 7px; margin-bottom: 4px; font-size: .86rem; }
.preview .pq { padding: 6px 0; border-top: 1px solid var(--line); font-size: .92rem; }
.preview .pq .t { font-size: .7rem; font-weight: 700; text-transform: uppercase; color: var(--muted); margin-right: 6px; }
.preview .pq .o { margin-left: 22px; color: var(--muted); }
.preview .pq .o .right { color: var(--ok); font-weight: 700; }
.preview .pq .h { margin-left: 22px; color: var(--muted); font-style: italic; }
.ed-head { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 12px; }
.ed-head .title-in { flex: 1 1 320px; font-size: 1.25rem; font-weight: 700; padding: 6px 10px; }
.dirty { color: var(--warn); font-weight: 650; font-size: .86rem; }
.section-card { margin-top: 14px; }
.section-card .sec-head { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.section-card .sec-head input { flex: 1 1 260px; font-weight: 650; }
.qrow { display: grid; grid-template-columns: 34px 1fr auto; gap: 8px; padding: 10px 0; border-top: 1px solid var(--line); align-items: start; }
.qrow .qn { font-weight: 700; color: var(--muted); padding-top: 7px; text-align: right; }
.qrow .qbody { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.qrow .line { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.qrow .line > input, .qrow .line > textarea { flex: 1 1 200px; }
.qrow .line > select { flex: 0 0 auto; }
.qrow .lbl { font-size: .74rem; font-weight: 700; color: var(--muted); text-transform: uppercase; width: 62px; flex: 0 0 auto; }
.qrow textarea.prompt-in { min-height: 36px; height: 36px; font-size: .95rem; }
.qrow .tools { display: flex; gap: 2px; }
.qrow.nokey .qn { color: var(--warn); }
.pill { font-size: .7rem; font-weight: 700; padding: 1px 7px; border-radius: 99px; background: var(--accent-soft); color: var(--accent); }
.links { display: flex; flex-wrap: wrap; gap: 6px; }
.stack { display: flex; flex-direction: column; gap: 10px; }
@media (max-width: 640px) {
  main { padding: 12px; }
  .top { padding: 8px 12px; gap: 8px; } .top .sub { display: none; }
  .qrow { grid-template-columns: 26px 1fr; } .qrow .tools { grid-column: 2; }
  .qrow .lbl { width: auto; }
  .qcard .q .prompt { font-size: 1.1rem; }
  .hide-sm { display: none; }
}