/* BeamLab Education study pages — same clinical surface as the application:
   one teal accent, white panels, no marketing chrome. */
:root {
  --teal: #0d5c63; --teal-weak: #e6f1f2; --teal-line: #b7d3d5;
  --ink: #12222a; --muted: #5a6b73; --bg: #eef2f3; --panel: #ffffff;
  --line: #d5dee1; --ok: #1b7f4b; --ok-bg: #e6f5ec; --warn: #a86400;
  --warn-bg: #fdf3e2; --bad: #a4232b; --bad-bg: #fbeaeb;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--teal); }
.wrap { max-width: 900px; margin: 0 auto; padding: 24px 18px 96px; }
header.topbar {
  position: sticky; top: 0; z-index: 20; background: #fff; border-bottom: 1px solid var(--line);
}
.topbar .inner {
  max-width: 900px; margin: 0 auto; padding: 10px 18px; display: flex; align-items: center;
  gap: 12px; flex-wrap: wrap;
}
.brand { font-weight: 700; letter-spacing: .2px; color: var(--teal); }
.brand span { color: var(--muted); font-weight: 500; }
.spacer { flex: 1; }
.progress { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); }
.progress .bar { width: 160px; height: 6px; background: #e3e9ea; border-radius: 3px; overflow: hidden; }
.progress .bar > i { display: block; height: 100%; width: 0; background: var(--teal); transition: width .2s; }
h1 { font-size: 26px; line-height: 1.25; margin: 8px 0 6px; }
h2 { font-size: 19px; margin: 34px 0 10px; padding-top: 10px; border-top: 1px solid var(--line); }
h3 { font-size: 15px; margin: 0 0 6px; }
p.lead { color: var(--muted); margin: 0 0 18px; max-width: 68ch; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 20px 22px; margin: 14px 0; }
.card.notice { border-left: 4px solid var(--teal); }
.card.warn { border-left: 4px solid var(--warn); background: var(--warn-bg); }
.card.err { border-left: 4px solid var(--bad); background: var(--bad-bg); }
.small { font-size: 13px; color: var(--muted); }
.mono { font-family: var(--mono); }
.q { padding: 14px 0; border-bottom: 1px dashed var(--line); }
.q:last-child { border-bottom: 0; }
.q .stem { font-weight: 600; margin-bottom: 8px; }
.q .stem .num { color: var(--muted); font-weight: 500; margin-right: 6px; }
.q.missing { background: var(--bad-bg); outline: 1px solid var(--bad); border-radius: 6px; padding: 14px 12px; }
.options { display: grid; gap: 6px; }
.options label {
  display: flex; gap: 9px; align-items: flex-start; padding: 7px 10px; border: 1px solid var(--line);
  border-radius: 6px; background: #fff; cursor: pointer;
}
.options label:hover { border-color: var(--teal-line); background: var(--teal-weak); }
.options input { margin-top: 3px; accent-color: var(--teal); }
.scale { display: flex; gap: 6px; flex-wrap: wrap; }
.scale label {
  flex: 1 1 120px; text-align: center; padding: 8px 6px; border: 1px solid var(--line);
  border-radius: 6px; cursor: pointer; font-size: 13px; background: #fff;
}
.scale label:hover { border-color: var(--teal-line); background: var(--teal-weak); }
.scale input { display: none; }
.scale input:checked + span { font-weight: 700; }
.scale label:has(input:checked) { border-color: var(--teal); background: var(--teal-weak); box-shadow: inset 0 0 0 1px var(--teal); }
textarea, input[type=text] {
  width: 100%; border: 1px solid var(--line); border-radius: 6px; padding: 9px 10px;
  font: inherit; background: #fff;
}
textarea { min-height: 84px; resize: vertical; }
details.anchors { margin-top: 6px; font-size: 13px; color: var(--muted); }
details.anchors summary { cursor: pointer; color: var(--teal); }
details.anchors ul { margin: 6px 0 0; padding-left: 18px; }
button.primary {
  background: var(--teal); color: #fff; border: 1px solid var(--teal); border-radius: 6px;
  padding: 11px 20px; font: inherit; font-weight: 600; cursor: pointer;
}
button.primary:hover { background: #0a4a50; }
button.primary:disabled { opacity: .55; cursor: progress; }
a.primary {
  background: var(--teal); color: #fff; border: 1px solid var(--teal); border-radius: 6px;
  padding: 11px 20px; font-weight: 600; text-decoration: none; display: inline-block;
}
a.primary:hover { background: #0a4a50; }
a.ghost {
  background: #fff; color: var(--ink); border: 1px solid var(--line); border-radius: 6px;
  padding: 9px 14px; text-decoration: none; display: inline-block;
}
a.ghost:hover { border-color: var(--teal-line); background: var(--teal-weak); }
button.ghost {
  background: #fff; color: var(--ink); border: 1px solid var(--line); border-radius: 6px;
  padding: 8px 14px; font: inherit; cursor: pointer;
}
button.ghost:hover { border-color: var(--teal-line); background: var(--teal-weak); }
button.link { background: none; border: 0; color: var(--bad); text-decoration: underline; cursor: pointer; font: inherit; padding: 0; }
.actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-top: 18px; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 14px 16px; }
.stat .k { font-size: 12px; text-transform: uppercase; letter-spacing: .6px; color: var(--muted); }
.stat .v { font-size: 26px; font-weight: 700; margin-top: 2px; }
.stat .v small { font-size: 14px; font-weight: 500; color: var(--muted); }
table { border-collapse: collapse; width: 100%; font-size: 13.5px; }
th, td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .4px; }
tr.ok td:first-child { border-left: 3px solid var(--ok); }
tr.no td:first-child { border-left: 3px solid var(--bad); }
.tag { display: inline-block; padding: 1px 7px; border-radius: 10px; font-size: 12px; font-weight: 600; }
.tag.ok { background: var(--ok-bg); color: var(--ok); }
.tag.no { background: var(--bad-bg); color: var(--bad); }
label.field { display: block; margin: 12px 0; }
label.field > span { display: block; font-weight: 600; margin-bottom: 5px; }
.check { display: flex; gap: 10px; align-items: flex-start; margin: 14px 0; }
.check input { margin-top: 4px; accent-color: var(--teal); }
.banner { padding: 12px 14px; border-radius: 6px; margin: 12px 0; display: none; }
.banner.show { display: block; }
.banner.err { background: var(--bad-bg); color: var(--bad); border: 1px solid #e5b3b6; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
footer.foot { max-width: 900px; margin: 0 auto; padding: 0 18px 40px; color: var(--muted); font-size: 12.5px; }
/* simulator wrapper */
body.lab { height: 100%; overflow: hidden; }
body.lab .labbar {
  height: 46px; display: flex; align-items: center; gap: 12px; padding: 0 14px;
  background: #fff; border-bottom: 1px solid var(--line);
}
body.lab iframe { display: block; width: 100%; height: calc(100vh - 46px); border: 0; background: #fff; }
body.lab .timer { font-family: var(--mono); font-size: 13px; color: var(--muted); }
@media print { .topbar, .actions, button { display: none !important; } }