:root {
  --bg: #eef3f8;
  --card: #ffffff;
  --ink: #142536;
  --muted: #4d6073;
  --bar: #1f4e79;
  --bar-ink: #ffffff;
  --accent: #1f6fb2;
  --accent-dark: #17578c;
  --line: #c6d3e0;
  --selected: #e4effa;
  --focus: #e09a00;
  --right: #1d6b3a;
  --right-bg: #e5f4ea;
  --try: #8a4b00;
  --try-bg: #fdf1e1;
  --radius: 14px;
  --shadow: 0 2px 6px rgba(20, 37, 54, .06), 0 12px 32px rgba(20, 37, 54, .08);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  accent-color: var(--accent);
  caret-color: var(--accent);
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; line-height: 1.5; }
::selection { background: #cfe2f6; color: var(--ink); }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
h1:focus { outline: none; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.test-bar {
  display: grid;
  grid-template-columns: 1fr minmax(180px, 2fr) 1fr;
  align-items: center;
  gap: 16px;
  min-height: 64px;
  padding: 8px 24px;
  background: var(--bar);
  color: var(--bar-ink);
}
.test-bar-left { display: flex; gap: 18px; align-items: baseline; }
.home-link { color: var(--bar-ink); font-weight: 600; text-underline-offset: 3px; }
.learner-name { font-size: 1.05rem; font-weight: 600; }
.test-bar-center { text-align: center; font-size: .95rem; font-variant-numeric: tabular-nums; }
.test-bar-center[hidden] { display: block !important; visibility: hidden; }
.progress-track { height: 10px; margin-top: 4px; border-radius: 99px; background: rgba(255, 255, 255, .25); overflow: hidden; }
#progress-fill { height: 100%; width: 100%; background: #ffffff; transform: scaleX(0); transform-origin: left; transition: transform .5s cubic-bezier(.16, 1, .3, 1); }
.test-bar-right { justify-self: end; }
.bar-button { min-height: 44px; border: 2px solid var(--bar-ink); background: transparent; color: var(--bar-ink); border-radius: 10px; padding: 6px 18px; font: inherit; font-weight: 600; cursor: pointer; }
.bar-button:hover { background: rgba(255, 255, 255, .14); }

main { max-width: 880px; margin: 0 auto; padding: 32px 20px 64px; }
.stage, .question-card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 36px 40px; margin-bottom: 24px; }
.stage.center { text-align: center; padding: 56px 40px; }
h1 { font-size: clamp(1.6rem, 4vw, 2.1rem); line-height: 1.2; letter-spacing: -.02em; margin: 0 0 16px; text-wrap: balance; }
h2 { font-size: 1.35rem; margin: 32px 0 10px; }
h3 { font-size: 1.05rem; margin: 28px 0 8px; }
.lead { font-size: 1.2rem; max-width: 60ch; margin: 0 0 20px; }
.stage.center .lead { margin-inline: auto; }
.note { color: var(--muted); font-size: .95rem; max-width: 70ch; }

.learners { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin: 28px 0 24px; }
.learner {
  display: flex; align-items: center; gap: 18px; text-align: left;
  background: #fff; color: var(--ink); border: 2px solid var(--line); border-radius: var(--radius);
  padding: 20px 22px; font: inherit; cursor: pointer;
  transition: border-color .15s ease, background-color .15s ease;
}
.learner:hover { border-color: var(--accent); background: var(--selected); }
.avatar { flex: none; display: grid; place-items: center; width: 64px; height: 64px; border-radius: 50%; background: var(--bar); color: #fff; font-size: 1.7rem; font-weight: 700; }
.learner-text { display: grid; gap: 2px; font-size: 1rem; }
.learner-text strong { font-size: 1.4rem; }
.status { color: var(--muted); font-size: .92rem; }

.steps { font-size: 1.1rem; padding-left: 24px; margin: 0 0 24px; }
.steps li { margin-bottom: 6px; padding-left: 4px; }
.actions { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; margin-top: 8px; }

.unit-picker { border: 1px solid var(--line); border-radius: 12px; margin: 0 0 24px; }
.unit-picker summary { min-height: 48px; display: flex; align-items: center; gap: .35em; padding: 10px 16px; cursor: pointer; font-weight: 600; list-style: none; }
.unit-picker summary::-webkit-details-marker { display: none; }
.unit-picker summary::after { content: "Change"; margin-left: auto; color: var(--accent, #2f6aa8); font-weight: 500; text-decoration: underline; text-underline-offset: 3px; }
.unit-picker[open] summary::after { content: "Done"; }
.unit-picker[open] summary { border-bottom: 1px solid var(--line); }
.unit-tools { display: flex; gap: 16px; padding: 10px 16px 0; }
.unit-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 8px 24px; padding: 4px 16px 12px; }
.unit-list fieldset { border: 0; margin: 0; padding: 0; }
.unit-list legend { font-weight: 600; padding: 8px 0 4px; }
.unit-list label { display: flex; align-items: flex-start; gap: 10px; min-height: 44px; padding: 6px 0; cursor: pointer; }
.unit-list input { width: 20px; height: 20px; margin-top: 2px; flex: none; }
.unit-list input:disabled + * , .unit-list label:has(input:disabled) { color: var(--muted); cursor: default; }
.unit-picker .message { padding: 0 16px 12px; }

button.primary, button.next {
  min-height: 52px; display: inline-flex; align-items: center; gap: 10px;
  background: var(--accent); color: #fff; border: 0; border-radius: 12px;
  padding: 12px 32px; font: inherit; font-size: 1.15rem; font-weight: 600; cursor: pointer;
}
button.primary:hover, button.next:hover:not(:disabled) { background: var(--accent-dark); }
button.secondary { min-height: 48px; background: #fff; color: var(--accent-dark); border: 2px solid var(--accent); border-radius: 12px; padding: 10px 24px; font: inherit; font-weight: 600; cursor: pointer; }
button.secondary:hover { background: var(--selected); }
.link-button { min-height: 44px; background: none; border: 0; padding: 0 4px; color: var(--accent-dark); font: inherit; text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }
button:disabled { opacity: .45; cursor: not-allowed; }
.next svg { width: 22px; height: 22px; }

.question-card { min-height: min(62vh, 560px); display: flex; flex-direction: column; padding: 32px 44px 36px; }
.prompt { font-size: 1.5rem; line-height: 1.45; margin: 8px 0 20px; max-width: 62ch; }
.visual { margin: 0 0 20px; color: var(--ink); }
.visual svg { max-width: 100%; height: auto; max-height: 260px; }

.choices { border: 0; padding: 0; margin: 0; display: grid; gap: 12px; }
.choice-help { color: var(--muted); margin: 6px 0 4px; padding: 0; }
.choice { display: flex; align-items: center; gap: 16px; min-height: 60px; border: 2px solid var(--line); border-radius: 12px; padding: 12px 18px; font-size: 1.2rem; cursor: pointer; background: #fff; transition: border-color .15s ease, background-color .15s ease; }
.choice:hover { border-color: var(--accent); }
.choice input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.bubble { flex: none; width: 28px; height: 28px; border: 2px solid var(--accent); border-radius: 50%; display: grid; place-items: center; }
.choice input[type=checkbox] + .bubble { border-radius: 6px; }
.choice:has(input:checked) { border-color: var(--accent); background: var(--selected); }
.choice:has(input:disabled) { cursor: default; }
.choice input:checked + .bubble::after { content: ""; width: 14px; height: 14px; border-radius: inherit; background: var(--accent); }
.choice input[type=checkbox]:checked + .bubble::after { border-radius: 2px; }
.choice:has(input:focus-visible) { outline: 3px solid var(--focus); outline-offset: 2px; }
.typed-label { display: block; font-weight: 600; margin-bottom: 6px; }
.typed { font: inherit; font-size: 1.5rem; min-height: 56px; padding: 8px 14px; width: min(340px, 100%); border: 2px solid var(--line); border-radius: 12px; font-variant-numeric: tabular-nums; }
.typed:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--selected); }
.done-summary { text-align: left; max-width: 560px; margin: 8px auto 28px; }
.question-actions { margin-top: auto; padding-top: 28px; display: flex; justify-content: flex-end; }

.grown-ups { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); }
.grown-ups > summary { min-height: 52px; display: flex; align-items: center; padding: 12px 24px; cursor: pointer; font-weight: 600; color: var(--muted); }
.grown-ups[open] > summary { border-bottom: 1px solid var(--line); }
.grown-ups > div { padding: 20px 24px 24px; }
.message { width: 100%; color: #a33a2b; margin: 0; }
.message:empty { display: none; }
.result h2 { margin-top: 20px; }
.result-head { display: flex; flex-wrap: wrap; gap: 12px 40px; margin: 0; }
.result-head dt { font-size: .9rem; color: var(--muted); }
.result-head dd { margin: 0; font-weight: 600; }
.estimate { font-size: 1.45rem; font-variant-numeric: tabular-nums; }
.path { width: 100%; max-width: 560px; height: auto; margin-top: 8px; font-size: 12px; fill: var(--muted); }
.path polyline { fill: none; stroke: var(--accent); stroke-width: 2.5; }
.path .grid { stroke: var(--line); stroke-dasharray: 4 4; }
.domains { border-collapse: collapse; width: 100%; font-variant-numeric: tabular-nums; }
.domains th, .domains td { text-align: left; padding: 6px 16px 6px 0; border-bottom: 1px solid var(--line); }
.answer-review { padding: 0; list-style: none; }
.answer-review li { display: grid; grid-template-columns: 48px minmax(0, 1fr); gap: 12px; padding: 20px 0; border-top: 1px solid var(--line); }
.answer-review p { margin: 2px 0; }
.q-number { position: relative; display: grid; place-items: center; width: 48px; height: 48px; font-size: 1.3rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.q-mark { position: absolute; inset: 0; width: 100%; height: 100%; fill: none; stroke-width: 3.5; stroke-linecap: round; stroke-linejoin: round; }
.q-number.correct .q-mark { stroke: var(--right); }
.q-number.incorrect .q-mark { stroke: #b52f35; }
.q-content { overflow-wrap: anywhere; }
.q-content .visual { margin: 12px 0; }
.q-meta { color: var(--muted); font-size: .9rem; }
.q-prompt { font-weight: 600; }
.q-detail { display: grid; grid-template-columns: max-content 1fr; gap: 2px 14px; margin: 6px 0 0; }
.q-detail dt { color: var(--muted); }
.q-detail dd { margin: 0; }

@media (max-width: 640px) {
  .test-bar { grid-template-columns: 1fr auto; padding: 8px 14px; }
  .test-bar-center { grid-column: 1 / -1; grid-row: 2; }
  .test-bar-center[hidden] { display: none !important; }
  main { padding: 16px 12px 48px; }
  .stage, .question-card { padding: 24px 20px; }
  .stage.center { padding: 40px 20px; }
  .prompt { font-size: 1.25rem; }
  .next { width: 100%; justify-content: center; }
  .unit-list { grid-template-columns: 1fr; }
  .q-detail { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  #progress-fill, .learner, .choice { transition: none; }
}

.profile-list { list-style: none; display: grid; gap: 12px; margin: 28px 0 24px; padding: 0; }
.profile-row { display: flex; align-items: center; gap: 12px; }
.profile-row .learner { flex: 1; min-width: 0; }
.profile-row .learner-text strong { overflow-wrap: anywhere; }
.profile-add, .share { display: grid; gap: 8px; margin: 8px 0 16px; }
.profile-add label, .share label { font-weight: 600; }
.profile-add-row { display: flex; flex-wrap: wrap; gap: 12px; }
.profile-add input, .share input { flex: 1 1 200px; min-height: 48px; border: 2px solid var(--line); border-radius: 10px; padding: 8px 14px; font: inherit; color: var(--ink); background: #fff; }
.profile-add input:focus-visible, .share input:focus-visible { outline: 3px solid var(--accent-dark); outline-offset: 2px; }
.test-bar-right { display: flex; gap: 8px; }