/* Who Are Your Students? — styles.
   Base copied from ../learning-outcomes/css/styles.css (same SEA-EU thinking-surface family,
   same tokens); everything prefixed ks- belongs to this page. */

:root {
  /* text-only shades of the accent colours, 4.5:1 or better on every course background (30 Sep 2026) */
  --text-ochre: #855c15; --text-green: #4c6a3a; --text-brown: #8e4f22;
  --paper: #f5f2ea;
  --card: #fcfaf4;
  --inset: #efeadd;
  --ink: #23261f;
  --ink-soft: #474b40;
  --muted: #6b6557;
  --hair: #ddd6c4;
  --hair-strong: #c9c1ab;
  --danger: #a8442c;
  --danger-soft: #f4e6df;
  --ok: #587d4b;
  --ok-soft: #e9eedd;
  --warn: #b7822f;
  --warn-soft: #f5ecd8;
  --ai: #6c58a8;
  --ai-soft: #ece7f4;
  /* the alignment triad, as on the course home */
  --c-out: #34708b;
  --c-act: #587d4b;
  --c-ass: #a25e2e;
  --font-ui: "Schibsted Grotesk", system-ui, sans-serif;
  --font-display: "Newsreader", Georgia, serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-ui);
  -webkit-font-smoothing: antialiased;
}

.app { min-height: 100vh; display: flex; flex-direction: column; }

/* ---------- masthead ---------- */

.masthead {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  padding: 26px 44px 0 44px;
  border-bottom: 1px solid var(--hair-strong);
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
}

.masthead-id { padding-bottom: 18px; }

.masthead-eyebrow {
  margin: 0 0 4px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.masthead-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 34px;
  line-height: 1.05;
  letter-spacing: -0.01em;
  font-optical-sizing: auto;
}

.lens-tabs { display: flex; gap: 4px; }

.lens-tab {
  appearance: none;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 14px 16px 16px 16px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  cursor: pointer;
  color: var(--muted);
  font-family: var(--font-ui);
  transition: color 0.15s ease;
}

.lens-tab:hover { color: var(--ink-soft); }

.lens-tab.is-active {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

.lens-tab-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.lens-tab-name { font-size: 15.5px; font-weight: 600; }

/* ---------- layout ---------- */

.layout {
  display: grid;
  grid-template-columns: minmax(380px, 5fr) minmax(420px, 6fr);
  gap: 48px;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: 36px 44px 64px 44px;
  flex: 1;
  align-items: start;
}

.stage { position: sticky; top: 28px; }

.stage-caption {
  margin: 6px auto 0 auto;
  max-width: 420px;
  text-align: center;
  font-size: 15px;
  line-height: 1.5;
  color: var(--muted);
}

.panel { min-width: 0; }

.lens-panel { display: flex; flex-direction: column; gap: 18px; }

/* ---------- cards (shared vocabulary) ---------- */

.detail-card {
  background: var(--card);
  border: 1px solid var(--hair);
  border-radius: 8px;
  padding: 26px 28px;
}

.detail-kicker {
  margin: 0 0 6px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.detail-title {
  margin: 0 0 12px 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 25px;
  line-height: 1.18;
  letter-spacing: -0.005em;
}

.detail-body {
  margin: 0 0 12px 0;
  font-size: 17px;
  line-height: 1.68;
  color: var(--ink-soft);
}
.detail-body:last-child { margin-bottom: 0; }

.detail-craft {
  margin: 0 0 16px 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.detail-craft li {
  position: relative;
  padding-left: 20px;
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink-soft);
}
.detail-craft li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 8px;
  width: 7px;
  height: 7px;
  background: var(--hair-strong);
}
.detail-craft:last-child { margin-bottom: 0; }

.detail-example {
  background: var(--inset);
  border-radius: 6px;
  padding: 16px 18px;
}
.detail-example-kicker {
  margin: 0 0 6px 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.detail-example-text {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.5;
  font-style: italic;
}

.detail-hint {
  margin: 14px 0 0 0;
  font-size: 15px;
  line-height: 1.55;
  color: var(--muted);
}

.footnote {
  margin: 8px 0 0 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted);
}

.bq { margin: 0 0 12px 0; padding: 4px 0 0 0; }
.bq p {
  margin: 0 0 8px 0;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 19px;
  line-height: 1.5;
}
.bq cite {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 13px;
  color: var(--muted);
}


.approach-card { border-left-width: 4px; }
.approach-card[data-tone="ai"] { border-left-color: var(--ai); }

/* ---------- next / link cards ---------- */

.next-link {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--inset);
  border: 1px solid var(--hair);
  border-radius: 8px;
  padding: 16px 20px;
  margin-top: 12px;
  transition: border-color 0.15s ease;
}
.next-link:first-of-type { margin-top: 4px; }
.next-link:hover { border-color: var(--ink); }
.next-link-kicker {
  margin: 0 0 4px 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.next-link-label { margin: 0; font-size: 15px; font-weight: 600; color: var(--ink); }

/* ---------- colophon ---------- */

.colophon {
  border-top: 1px solid var(--hair-strong);
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: 18px 44px 26px 44px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.colophon p {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}


/* ======================= this page (ks-) ======================= */

/* ---------- stage: the precondition tiles (01, 04) ---------- */

.ks-tiles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.ks-tiles-core {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px;
  background: var(--ink);
  color: var(--card);
  border-radius: 8px;
  font-family: var(--font-display);
  font-size: 21px;
}
.ks-tile {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  background: var(--card);
  border: 1px solid var(--hair);
  border-left: 5px solid var(--hair-strong);
  border-radius: 8px;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.ks-tile:last-child { grid-column: 1 / -1; }
.ks-tile-name { font-family: var(--font-display); font-size: 17px; line-height: 1.25; color: var(--ink); }
.ks-tile-state {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.ks-tile.is-know { border-left-color: var(--ok); background: var(--ok-soft); }
.ks-tile.is-know .ks-tile-state { color: var(--text-green); }
.ks-tile.is-guess { border-left-color: var(--warn); background: var(--warn-soft); }
.ks-tile.is-guess .ks-tile-state { color: var(--text-ochre); }
.ks-tile.is-unknown { border-left-color: var(--danger); background: var(--danger-soft); }
.ks-tile.is-unknown .ks-tile-state { color: var(--danger); }
.ks-tile.is-focus { box-shadow: 0 0 0 2px var(--ai); }

.ks-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 16px; margin-top: 14px; font-size: 13px; color: var(--ink-soft); }
.ks-legend-item { display: inline-flex; align-items: center; gap: 6px; }
.ks-legend-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--hair-strong); }
.ks-legend-item.is-know .ks-legend-dot { background: var(--ok); }
.ks-legend-item.is-guess .ks-legend-dot { background: var(--warn); }
.ks-legend-item.is-unknown .ks-legend-dot { background: var(--danger); }

/* ---------- stage: the finding-out timeline (02) ---------- */

.ks-timeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.ks-phase {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 10px;
  background: var(--card);
  border: 1px solid var(--hair);
  border-top: 4px solid var(--ok);
  border-radius: 8px;
  min-height: 150px;
}
.ks-phase-name {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.ks-phase-items { display: flex; flex-direction: column; gap: 6px; }
.ks-phase-item { font-size: 12.5px; line-height: 1.35; color: var(--ink); background: var(--ok-soft); border-radius: 5px; padding: 6px 7px; }
.ks-phase-empty { font-size: 12.5px; color: var(--muted); font-style: italic; }

.ks-coverage { margin-top: 16px; padding: 14px 16px; background: var(--card); border: 1px solid var(--hair); border-radius: 8px; }
.ks-coverage-title {
  margin: 0 0 8px 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.ks-gap-none { margin: 0; font-size: 15px; line-height: 1.5; color: var(--muted); }
.ks-gaps { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 7px; }
.ks-gaps li { position: relative; padding-left: 20px; font-size: 13.5px; line-height: 1.45; }
.ks-gaps li::before { content: ""; position: absolute; left: 2px; top: 6px; width: 8px; height: 8px; border-radius: 50%; background: var(--danger); }
.ks-gaps li.is-covered::before { background: var(--ok); }
.ks-gap-name { font-weight: 600; color: var(--ink); }
.ks-gap-by { display: block; color: var(--ink-soft); }
.ks-gaps li.is-open .ks-gap-by { color: var(--danger); }

/* ---------- stage: degrees of freedom (03) ---------- */

.ks-free { padding: 16px 18px; background: var(--card); border: 1px solid var(--hair); border-radius: 8px; }
.ks-free-head,
.ks-free-track { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; }
.ks-free-head { margin-left: 44%; margin-bottom: 8px; }
.ks-free-head span {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1.3;
  color: var(--muted);
  text-align: center;
}
.ks-free-row { display: grid; grid-template-columns: 44% 1fr; align-items: center; gap: 0; padding: 7px 0; border-top: 1px solid var(--hair); }
.ks-free-name { margin: 0; padding-right: 10px; font-size: 14px; line-height: 1.3; color: var(--ink); }
.ks-free-cell { height: 18px; border-radius: 4px; background: var(--inset); transition: background 0.2s ease; }
.ks-free-cell.is-on.is-teacher { background: var(--ink-soft); }
.ks-free-cell.is-on.is-options { background: var(--warn); }
.ks-free-cell.is-on.is-students { background: var(--ok); }
.ks-free-sum { margin: 12px 0 0 0; font-size: 15px; color: var(--ink-soft); text-align: center; }

/* ---------- panel: activities ---------- */

.ks-activity { border-left: 4px solid var(--ok); }

.ks-three { display: flex; flex-direction: column; gap: 8px; margin-bottom: 4px; }
.ks-three-item { display: grid; grid-template-columns: 9.5em 1fr; gap: 4px 16px; align-items: baseline; background: var(--inset); border-radius: 6px; padding: 12px 14px; }
.ks-three-name { margin: 0; font-family: var(--font-display); font-size: 18px; line-height: 1.25; color: var(--ink); }
.ks-three-body { margin: 0; font-size: 15px; line-height: 1.5; color: var(--ink-soft); }

.ks-rates, .ks-elements { display: flex; flex-direction: column; gap: 0; margin: 4px 0 8px 0; }
.ks-rate { padding: 12px 0; border-top: 1px solid var(--hair); }
.ks-rate-name { margin: 0; font-size: 15px; font-weight: 600; color: var(--ink); }
.ks-rate-q { margin: 2px 0 8px 0; font-size: 15px; line-height: 1.5; color: var(--ink-soft); }

.ks-choices { display: flex; flex-wrap: wrap; gap: 6px; }
.ks-choice {
  appearance: none;
  font-family: var(--font-ui);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink-soft);
  background: var(--card);
  border: 1px solid var(--hair-strong);
  border-radius: 999px;
  padding: 6px 13px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.ks-choice:hover { border-color: var(--ink); color: var(--ink); }
.ks-choice.is-on { color: var(--card); }
.ks-choice.is-know.is-on { background: var(--ok); border-color: var(--ok); }
.ks-choice.is-guess.is-on { background: var(--warn); border-color: var(--warn); }
.ks-choice.is-unknown.is-on { background: var(--danger); border-color: var(--danger); }
.ks-choice.is-free-teacher.is-on { background: var(--ink-soft); border-color: var(--ink-soft); }
.ks-choice.is-free-options.is-on { background: var(--warn); border-color: var(--warn); }
.ks-choice.is-free-students.is-on { background: var(--ok); border-color: var(--ok); }

.ks-methods { display: flex; flex-direction: column; gap: 6px; }
.ks-method {
  appearance: none;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  text-align: left;
  font-family: var(--font-ui);
  background: var(--card);
  border: 1px solid var(--hair);
  border-radius: 6px;
  padding: 11px 12px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.ks-method:hover { border-color: var(--hair-strong); }
.ks-method.is-on { background: var(--ok-soft); border-color: var(--ok); }
.ks-method-box {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 1px;
  border: 1.5px solid var(--hair-strong);
  border-radius: 4px;
  background: #fff;
  position: relative;
}
.ks-method.is-on .ks-method-box { background: var(--ok); border-color: var(--ok); }
.ks-method.is-on .ks-method-box::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.ks-method-text { display: flex; flex-direction: column; gap: 2px; }
.ks-method-name { font-size: 14.5px; font-weight: 600; color: var(--ink); }
.ks-method-body { font-size: 15px; line-height: 1.5; color: var(--ink-soft); }
.ks-method-informs { font-size: 13.5px; color: var(--muted); }

.ks-label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.ks-textarea {
  box-sizing: border-box;
  width: 100%;
  display: block;
  margin-top: 8px;
  font-family: var(--font-ui);
  font-size: 15px;
  letter-spacing: 0;
  text-transform: none;
  line-height: 1.5;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--hair-strong);
  border-radius: 6px;
  padding: 9px 11px;
  resize: vertical;
}
.ks-label .ks-textarea { margin-top: 0; }
.ks-textarea:focus { outline: 2px solid var(--ok); outline-offset: 1px; border-color: var(--ok); }

.ks-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 16px; }
.ks-btn {
  appearance: none;
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--hair-strong);
  border-radius: 6px;
  padding: 9px 14px;
  cursor: pointer;
  text-decoration: none;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.ks-btn:hover { border-color: var(--ink); }
.ks-btn-primary { background: var(--ink); color: var(--card); border-color: var(--ink); }
.ks-btn-primary:hover { background: #3a3e33; }
.ks-btn.is-done { background: var(--ok); border-color: var(--ok); color: var(--card); }

/* ---------- 04 AI ---------- */

.ks-small { margin: 8px 0 0 0; font-size: 14px; line-height: 1.5; color: var(--muted); }
.ks-privacy { color: var(--ai); }
.ks-prompt {
  margin: 12px 0 0 0;
  max-height: 320px;
  overflow: auto;
  background: #fff;
  border: 1px solid var(--hair-strong);
  border-radius: 6px;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink);
  white-space: pre-wrap;
  word-wrap: break-word;
}
.ks-subhead {
  margin: 18px 0 8px 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.ks-checks { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 5px; }
.ks-checks li { position: relative; padding-left: 20px; font-size: 15px; line-height: 1.5; color: var(--ink-soft); }
.ks-checks li::before { content: ""; position: absolute; left: 2px; top: 6px; width: 8px; height: 8px; border-radius: 50%; background: var(--ai); }

/* ---------- responsive ---------- */

@media (max-width: 1020px) {
  .layout { grid-template-columns: 1fr; gap: 24px; padding: 24px 24px 48px 24px; }
  .stage { position: static; max-width: 560px; margin: 0 auto; width: 100%; }
  .masthead { padding: 22px 24px 0 24px; }
  .lens-tabs { overflow-x: auto; width: 100%; }
  .colophon { padding: 16px 24px 22px 24px; }
}

@media (max-width: 640px) {
  .layout { padding: 20px 16px 40px 16px; }
  .masthead { padding: 20px 16px 0 16px; }
  .colophon { padding: 16px 16px 22px 16px; }
  .masthead-title { font-size: 27px; }
  .lens-tab { padding: 10px 10px 12px 10px; }
  .lens-tab-name { font-size: 14px; }
  .detail-card { padding: 20px 18px; }
  .ks-three-item { grid-template-columns: 1fr; }
  .ks-timeline { grid-template-columns: repeat(2, 1fr); }
  .ks-phase { min-height: 0; }
  .ks-free-head { margin-left: 40%; }
  .ks-free-row { grid-template-columns: 40% 1fr; }
}

/* reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}