/* Physics Circle student portal + teacher panel. Colours come from style.css (light / dark). */
body.portal { min-height: 100vh; background: var(--bg); color: var(--ink); font-family: var(--sys); }
.portal main { padding: 20px 16px 60px; }
.portal .wrap.wide { max-width: 1100px; }
.portal h1 { margin: 6px 0 4px; font-size: 26px; letter-spacing: -.01em; }
.portal h2 { margin: 26px 0 10px; font-size: 19px; }
.portal h3 { margin: 18px 0 8px; font-size: 16px; }
.portal .sub { margin: 0 0 16px; color: var(--muted); }
.portal .muted { color: var(--muted); }
.portal .small { font-size: 13px; }
.portal [hidden] { display: none !important; }

.demo-bar { padding: 6px 16px; background: var(--note-soft); color: var(--note); font-size: 13px; text-align: center; }
.gbar .who { margin-left: 4px; color: rgba(255, 255, 255, .85); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 40vw; }
.gbar .gl-btn { padding: 4px 10px; border: 1px solid rgba(255, 255, 255, .35); border-radius: 980px; background: none; color: #fff; font: inherit; font-size: 12.5px; cursor: pointer; }

.box { padding: 18px; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; margin-bottom: 14px; }
.box.narrow { max-width: 400px; margin: 30px auto; }
.grid2 { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

.field { display: grid; gap: 4px; margin-bottom: 12px; }
.field > span { font-size: 13px; font-weight: 600; color: var(--muted); }
.portal input[type=text], .portal input[type=password], .portal input[type=number], .portal input[type=datetime-local],
.portal input[type=search], .portal select, .portal textarea {
  width: 100%; min-width: 0; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px;
  background: var(--bg); color: var(--ink); font: inherit; font-size: 15px; box-sizing: border-box; }
.portal textarea { min-height: 110px; resize: vertical; }
.portal input:focus, .portal select:focus, .portal textarea:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: var(--accent); }
.row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.row > .field { flex: 1 1 160px; margin-bottom: 0; }
.rows { display: grid; gap: 12px; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 10px 18px; border: 1px solid transparent;
  border-radius: 980px; background: var(--accent); color: #fff; font: inherit; font-size: 15px; font-weight: 600; cursor: pointer; text-decoration: none; }
.btn:disabled { opacity: .5; cursor: default; }
.btn.ghost { background: transparent; color: var(--accent); border-color: var(--accent); }
.btn.plain { background: var(--bg); color: var(--ink); border-color: var(--line); }
.btn.danger { background: transparent; color: var(--bad); border-color: var(--bad); }
.btn.sm { padding: 6px 12px; font-size: 13px; }
.btn.block { width: 100%; }
.linkbtn { padding: 0; border: 0; background: none; color: var(--accent); font: inherit; cursor: pointer; text-decoration: underline; }
.msg { margin: 10px 0 0; font-size: 14px; }
.msg.bad { color: var(--bad); }
.msg.good { color: var(--good); }

.tabs { display: flex; gap: 4px; margin: 0 0 18px; padding: 4px; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; overflow-x: auto; }
.tabs button { flex: 1 0 auto; padding: 8px 14px; border: 0; border-radius: 9px; background: none; color: var(--muted); font: inherit; font-size: 14px; font-weight: 600; cursor: pointer; white-space: nowrap; }
.tabs button[aria-selected="true"] { background: var(--accent); color: #fff; }

.stats { display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); margin-bottom: 14px; }
.stat { padding: 12px 14px; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; }
.stat b { display: block; font-size: 24px; font-variant-numeric: tabular-nums; }
.stat span { color: var(--muted); font-size: 13px; }
.stat.good b { color: var(--good); }
.stat.bad b { color: var(--bad); }

.tbl-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
.tbl th, .tbl td { padding: 9px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; white-space: nowrap; }
.tbl th { color: var(--muted); font-size: 12.5px; font-weight: 600; background: var(--bg); position: sticky; top: 0; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl td.num, .tbl th.num { text-align: right; font-variant-numeric: tabular-nums; }
.tbl tr.click { cursor: pointer; }
.tbl tr.click:hover td { background: var(--accent-soft); }
.tbl td.wrap { white-space: normal; min-width: 180px; }

.tag { display: inline-block; padding: 2px 8px; border-radius: 980px; font-size: 12px; font-weight: 600; background: var(--bg); color: var(--muted); border: 1px solid var(--line); white-space: nowrap; }
.tag.good { background: var(--good-soft); color: var(--good); border-color: transparent; }
.tag.bad { background: var(--bad-soft); color: var(--bad); border-color: transparent; }
.tag.note { background: var(--note-soft); color: var(--note); border-color: transparent; }
.tag.blue { background: var(--accent-soft); color: var(--accent); border-color: transparent; }

.accs { display: grid; gap: 8px; }
.acc { display: grid; grid-template-columns: minmax(0, 1fr) 110px 44px; gap: 10px; align-items: center; font-size: 14px; }
.acc .lbl { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.acc .trk { height: 10px; background: var(--bg); border: 1px solid var(--line); border-radius: 980px; overflow: hidden; }
.acc .fil { height: 100%; background: var(--good); }
.acc .fil.mid { background: var(--note); }
.acc .fil.low { background: var(--bad); }
.acc .v { text-align: right; font-variant-numeric: tabular-nums; font-weight: 600; }
@media (max-width: 480px) { .acc { grid-template-columns: minmax(0, 1fr) 70px 40px; } }

.advice { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.advice li { padding: 10px 12px; border-radius: 10px; background: var(--note-soft); color: var(--ink); font-size: 14.5px; }
.advice li.good { background: var(--good-soft); }

.tlist { display: grid; gap: 10px; }
.titem { display: flex; gap: 12px; align-items: center; justify-content: space-between; padding: 14px 16px; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; }
.titem .t { min-width: 0; }
.titem .t b { display: block; font-size: 16px; }
.titem .t span { color: var(--muted); font-size: 13px; }
.titem.live { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; }
@media (max-width: 480px) { .titem { flex-direction: column; align-items: stretch; } }

/* test taking */
.tbar { position: sticky; top: 0; z-index: 5; display: flex; gap: 10px; align-items: center; justify-content: space-between; padding: 10px 16px; background: var(--surface); border-bottom: 1px solid var(--line); }
.tbar .ttl { min-width: 0; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.clock { font-variant-numeric: tabular-nums; font-size: 20px; font-weight: 700; padding: 4px 12px; border-radius: 10px; background: var(--accent-soft); color: var(--accent); }
.clock.low { background: var(--bad-soft); color: var(--bad); }
.tprog { height: 4px; background: var(--line); }
.tprog i { display: block; height: 100%; background: var(--accent); transition: width .9s linear; }
.qcard .meta { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 12px; color: var(--muted); font-size: 13px; }
.qcard .meta .qno { color: var(--ink); font-weight: 700; font-size: 15px; }
.opt.picked { border-color: var(--accent); background: var(--accent-soft); box-shadow: 0 0 0 1px var(--accent) inset; }
.numin { display: flex; gap: 8px; max-width: 320px; }
.qnav { display: flex; gap: 10px; justify-content: space-between; margin-top: 16px; flex-wrap: wrap; }
.palette { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.palette button { width: 36px; height: 36px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface); color: var(--ink); font: inherit; font-size: 13px; cursor: pointer; }
.palette button.done { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.palette button.cur { outline: 2px solid var(--ink); outline-offset: 1px; }
.palette button.right { background: var(--good-soft); border-color: var(--good); color: var(--good); }
.palette button.wrong { background: var(--bad-soft); border-color: var(--bad); color: var(--bad); }

/* teacher: question picker */
.picker { display: grid; gap: 14px; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); align-items: start; }
@media (max-width: 860px) { .picker { grid-template-columns: 1fr; } }
.qrow { display: flex; gap: 10px; align-items: center; padding: 8px 10px; border-bottom: 1px solid var(--line); font-size: 13.5px; }
.qrow:last-child { border-bottom: 0; }
.qrow .qi { flex: 1; min-width: 0; }
.qrow .qi b { font-weight: 600; }
.qrow .qi div { color: var(--muted); font-size: 12.5px; margin-top: 2px; }
.qscroll { max-height: 520px; overflow-y: auto; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.chk { display: inline-flex; gap: 6px; align-items: center; font-size: 14px; cursor: pointer; }
.chk input { width: 18px; height: 18px; accent-color: var(--accent); }
.checks { display: flex; flex-wrap: wrap; gap: 6px 14px; }
.covbar { height: 8px; border-radius: 980px; background: var(--bg); border: 1px solid var(--line); overflow: hidden; margin: 6px 0 2px; }
.covbar i { display: block; height: 100%; background: var(--accent); }

dialog.pv { width: min(760px, calc(100vw - 32px)); max-height: 85vh; padding: 0; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); color: var(--ink); }
dialog.pv::backdrop { background: rgba(0, 0, 0, .45); }
dialog.pv .pvh { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 12px 16px; border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--surface); }
dialog.pv .pvb { padding: 16px; }

.pinbox { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .05em; }
.slips { display: grid; gap: 10px; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.slip { padding: 12px; border: 1px dashed var(--line); border-radius: 10px; font-size: 14px; }
@media print {
  .gbar, .tabs, .demo-bar, .noprint { display: none !important; }
  .slip { break-inside: avoid; border-color: #999; }
  body.portal { background: #fff; }
  body.slips-only #view > *:not(#sliparea) { display: none !important; }
}
pre.rules { max-height: 260px; overflow: auto; padding: 12px; border-radius: 10px; background: var(--bg); border: 1px solid var(--line); font-size: 12px; white-space: pre-wrap; }
/* the website's bookmark star is not used in the portal; keep the header to one line on phones */
.portal .gbar a[href="bookmarks.html"] { display: none; }
.portal .gbar .gl-btn { white-space: nowrap; flex: none; }
.sync { margin: 6px 0 10px; min-height: 18px; font-size: 12.5px; color: var(--muted); text-align: right; }
.sync.off { padding: 8px 12px; border-radius: 10px; background: var(--note-soft); color: var(--note); text-align: left; font-size: 14px; }
.sync.bad { padding: 8px 12px; border-radius: 10px; background: var(--bad-soft); color: var(--bad); text-align: left; font-size: 14px; }