/* What Are Students Doing? — styles.
   Shares the SEA-EU thinking-surface design family (same tokens as ../purpose/,
   ../biesta/, ../susan-and-robert/). The diagram is Laurillard's Conversational
   Framework; the AI lens mirrors the DRM model's AI condition. */

:root {
  --paper: #f5f2ea;
  --card: #fcfaf4;
  --inset: #efeadd;
  --ink: #23261f;
  --ink-soft: #474b40;
  --muted: #6b6557;
  /* 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;
  --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;
  --ai-deep: #574687;
  /* the six learning types — distinct hues from the shared palette */
  --c-acquisition: #34708b;
  --c-inquiry: #2f6e63;
  --c-practice: #5d7b49;
  --c-production: #a25e2e;
  --c-discussion: #b7822f;
  --c-collaboration: #8a5a8f;
  --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; }

.masthead-controls { display: flex; align-items: flex-end; gap: 22px; flex-wrap: wrap; padding-bottom: 8px; }
.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; }

/* AI switch (mirrors the DRM model) */
.ai-switch {
  appearance: none; background: none; border: none; cursor: pointer;
  display: flex; align-items: center; gap: 10px; padding: 8px 4px 14px 4px; font-family: var(--font-ui);
}
.ai-switch-track { width: 38px; height: 20px; border-radius: 12px; background: var(--hair-strong); position: relative; transition: background 0.2s ease; flex: none; }
.ai-switch-knob { position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: var(--paper); transition: left 0.2s ease; }
.ai-switch.is-on .ai-switch-track { background: var(--ai); }
.ai-switch.is-on .ai-switch-knob { left: 20px; }
.ai-switch-label { display: flex; flex-direction: column; align-items: flex-start; line-height: 1.2; }
.ai-switch-name { font-size: 13.5px; font-weight: 600; color: var(--ink-soft); }
.ai-switch.is-on .ai-switch-name { color: var(--ai-deep); }
.ai-switch-state { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.04em; color: var(--muted); text-transform: uppercase; }

/* ---------- 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; margin-top: 38px; }
.stage-caption { margin: 6px auto 0 auto; max-width: 430px; text-align: center; font-size: 15px; line-height: 1.5; color: var(--muted); }

.lt-legend { display: flex; justify-content: center; gap: 22px; margin-top: 10px; flex-wrap: wrap; }
.lt-legend[hidden] { display: none; }
.lt-legend-item { display: inline-flex; align-items: center; gap: 7px; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em; color: var(--muted); }
.lt-legend-item svg { flex: none; }
.panel { min-width: 0; }
.lens-panel { display: flex; flex-direction: column; gap: 18px; }

/* ---------- the diagram ---------- */

.lt-svg { width: 100%; height: auto; display: block; }

/* the engine — the generate ⇄ modulate interplay — is the visual spine, present on every tab */
.lt-engine-line { fill: none; stroke: var(--ink-soft); stroke-width: 2.1; stroke-linecap: round; transition: stroke 0.25s ease, stroke-width 0.25s ease; }
.lt-engine-arrow { fill: var(--ink-soft); transition: fill 0.25s ease; }
.lt-engine-label { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.04em; fill: var(--ink-soft); paint-order: stroke; stroke: var(--paper); stroke-width: 4px; stroke-linejoin: round; transition: fill 0.25s ease; }   /* halo: the Inquiry arc passes behind "generate" */
/* emphasised as the Dewey axis on the framework tab */
.lt-svg.mode-framework .lt-engine-line { stroke: var(--c-practice); stroke-width: 2.5; }
.lt-svg.mode-framework .lt-engine-arrow { fill: var(--c-practice); }
.lt-svg.mode-framework .lt-engine-label { fill: var(--text-green); }
/* generate / modulate are clickable */
.lt-eng { cursor: pointer; }
.lt-eng-hit { fill: transparent; }
.lt-eng:hover .lt-engine-label { text-decoration: underline; text-underline-offset: 2px; }
.lt-eng:focus-visible { outline: none; }
.lt-eng:focus-visible .lt-engine-label { text-decoration: underline; text-underline-offset: 2px; }
.lt-eng.is-sel .lt-engine-line { stroke: var(--c-practice); stroke-width: 3.4; }
.lt-eng.is-sel .lt-engine-arrow { fill: var(--c-practice); }
.lt-eng.is-sel .lt-engine-label { fill: var(--c-practice); }
.lt-eng.is-dim :is(.lt-engine-line, .lt-engine-arrow) { opacity: 0.3; }   /* dim the arrows, not the label text (WCAG contrast) */
.lt-eng.is-dim .lt-engine-label { fill: var(--muted); }

.lt-node { cursor: pointer; }
.lt-node-dot { fill: var(--card); stroke: var(--hair-strong); stroke-width: 1.6; transition: stroke 0.2s ease, stroke-width 0.2s ease; }
.lt-node.is-learner .lt-node-dot { fill: var(--inset); stroke: var(--ink-soft); }
.lt-node-label { font-family: var(--font-ui); font-weight: 600; font-size: 13px; fill: var(--ink); }
.lt-node-sub { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.04em; fill: var(--muted); }
.lt-node:hover .lt-node-dot { stroke: var(--ink-soft); stroke-width: 2.2; }
.lt-node.is-sel .lt-node-dot { stroke: var(--ink); stroke-width: 2.8; }
.lt-node:focus-visible { outline: none; }
.lt-node:focus-visible .lt-node-dot { stroke: var(--ink); stroke-width: 2.8; }

.lt-node-ai { opacity: 0; pointer-events: none; transition: opacity 0.3s ease; }
.lt-svg.is-ai .lt-node-ai { pointer-events: auto; }
.lt-node-ai .lt-node-dot { fill: var(--ai-soft); stroke: var(--ai); stroke-dasharray: 3 3; }
.lt-node-ai .lt-node-label { fill: var(--ai-deep); }
.lt-svg.is-ai .lt-node-ai { opacity: 1; }

.lt-ai-links { opacity: 0; transition: opacity 0.3s ease; }
.lt-ai-links line { stroke: var(--ai); stroke-width: 1.2; stroke-dasharray: 2 5; opacity: 0.5; }
.lt-svg.is-ai .lt-ai-links { opacity: 1; }

/* arcs (the loops) */
.lt-arc-hit { fill: none; stroke: transparent; stroke-width: 22; cursor: pointer; }
.lt-arc-label-hit { fill: transparent; cursor: pointer; }
.lt-arc { fill: none; stroke: var(--hair-strong); stroke-width: 2; transition: stroke 0.2s ease, stroke-width 0.2s ease, opacity 0.2s ease; }
.lt-arrow { fill: var(--hair-strong); transition: fill 0.2s ease, opacity 0.2s ease; }
.lt-arc-label { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.04em; fill: var(--muted); paint-order: stroke; stroke: var(--paper); stroke-width: 4px; pointer-events: none; transition: fill 0.2s ease; }

.lt-cycle { cursor: pointer; }
.lt-cycle.is-lit .lt-arc { stroke: var(--cyc); stroke-width: 3.4; }
.lt-cycle.is-lit .lt-arrow { fill: var(--cyc); }
.lt-cycle.is-lit .lt-arc-label { fill: var(--cyc-text, var(--cyc)); }
/* recruited (the constellation): the type's colour, softened — between lit and dim */
.lt-cycle.is-recruit .lt-arc { stroke: var(--cyc); stroke-width: 2.4; opacity: 0.5; stroke-dasharray: 5 4; }
.lt-cycle.is-recruit .lt-arrow { fill: var(--cyc); opacity: 0.5; }
.lt-cycle.is-recruit .lt-arc-label { fill: var(--cyc-text, var(--cyc)); }
.lt-cycle.is-dim :is(.lt-arc, .lt-arrow) { opacity: 0.32; }   /* labels stay readable in --muted rather than fading (WCAG contrast) */
/* hover affordance: previews the type's colour so the arcs read as clickable */
.lt-cycle:not(.is-lit):not(.is-recruit):hover .lt-arc { stroke: var(--cyc); }
.lt-cycle:not(.is-lit):not(.is-recruit):hover .lt-arc-label { fill: var(--cyc-text, var(--cyc)); }
.lt-cycle:not(.is-lit):not(.is-recruit):hover .lt-arrow { fill: var(--cyc); }
.lt-cycle:focus-visible { outline: none; }
.lt-cycle:focus-visible .lt-arc { stroke-width: 3.4; }

.cycle-acquisition   { --cyc: var(--c-acquisition); }
.cycle-inquiry       { --cyc: var(--c-inquiry); }
.cycle-practice      { --cyc: var(--c-practice); --cyc-text: var(--text-green); }
.cycle-production    { --cyc: var(--c-production); --cyc-text: var(--text-brown); }
.cycle-discussion    { --cyc: var(--c-discussion); --cyc-text: var(--text-ochre); }
.cycle-collaboration { --cyc: var(--c-collaboration); }

/* AI badges on each loop (lens on) */
.lt-ai-badge { fill: var(--ai-soft); stroke: var(--ai); stroke-width: 1.2; opacity: 0; transition: opacity 0.3s ease; }
.lt-ai-badge-txt { font-family: var(--font-mono); font-size: 8.5px; font-weight: 600; fill: var(--ai-deep); opacity: 0; transition: opacity 0.3s ease; pointer-events: none; }
.lt-svg.is-ai .lt-ai-badge, .lt-svg.is-ai .lt-ai-badge-txt { opacity: 1; }
.lt-svg.is-ai .lt-cycle.is-dim .lt-ai-badge, .lt-svg.is-ai .lt-cycle.is-dim .lt-ai-badge-txt { opacity: 0.32; }

/* ---------- shared card 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 6px 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-body strong { color: var(--ink); font-weight: 600; }
.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); }
.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: 18px; line-height: 1.5; }
.bq cite { font-family: var(--font-mono); font-style: normal; font-size: 13px; color: var(--muted); }

.lt-type-card { border-left: 4px solid var(--c-acquisition); }
.lt-type-card[data-tone="acquisition"] { border-left-color: var(--c-acquisition); }
.lt-type-card[data-tone="inquiry"] { border-left-color: var(--c-inquiry); }
.lt-type-card[data-tone="practice"] { border-left-color: var(--c-practice); }
.lt-type-card[data-tone="production"] { border-left-color: var(--c-production); }
.lt-type-card[data-tone="discussion"] { border-left-color: var(--c-discussion); }
.lt-type-card[data-tone="collaboration"] { border-left-color: var(--c-collaboration); }
.lt-sub { margin: 0 0 12px 0; font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.06em; color: var(--muted); text-transform: uppercase; }
.lt-engine-card { border-left: 4px solid var(--c-practice); }
.lt-node-card { border-left: 4px solid var(--hair-strong); }

.lt-draws { margin-top: 16px; padding: 14px 16px; background: var(--inset); border-radius: 6px; }
.lt-draws-kicker { margin: 0 0 6px 0; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
.lt-draws-body { margin: 0; font-size: 14px; line-height: 1.6; color: var(--ink-soft); }

/* ---------- type picker ---------- */

.lt-picker { display: flex; flex-wrap: wrap; gap: 8px; }
.lt-pick {
  appearance: none; background: none; border: 1px solid var(--hair); border-radius: 20px;
  padding: 7px 14px 7px 11px; display: inline-flex; align-items: center; gap: 7px; cursor: pointer;
  font-family: var(--font-ui); font-size: 13.5px; font-weight: 600; color: var(--muted); transition: all 0.15s ease;
}
.lt-pick:hover { border-color: var(--hair-strong); color: var(--ink-soft); }
.lt-pick-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--pc); flex: none; }
.lt-pick.is-active { border-color: var(--pc); color: var(--ink); background: var(--card); }

/* ---------- the AI-per-type block ---------- */

.lt-ai-block { margin-top: 16px; padding: 16px 18px; background: var(--ai-soft); border-radius: 6px; }
.lt-ai-kicker { margin: 0 0 12px 0; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ai-deep); }
.lt-ai-row { margin-bottom: 12px; }
.lt-ai-tag { display: block; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ai-deep); margin-bottom: 3px; }
.lt-ai-val { font-size: 14px; line-height: 1.55; color: var(--ink-soft); }
.lt-ai-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 12px; }
.lt-ai-cell { background: var(--card); border-radius: 5px; padding: 11px 13px; }
.lt-ai-cell.is-automate { border-left: 3px solid var(--danger); }
.lt-ai-cell.is-augment { border-left: 3px solid var(--ok); }
.lt-ai-block .bq { margin: 0; }
.lt-ai-block .bq p { font-size: 16px; }

.lt-ai-banner { border-left: 4px solid var(--ai); }

/* ---------- framework: lineage + subheads + dewey ---------- */

.lt-subhead { margin: 16px 0 10px 0; font-family: var(--font-ui); font-weight: 600; font-size: 15px; color: var(--ink); }
.lt-dewey-card { border-left: 4px solid var(--c-practice); }

.lt-lineage { display: flex; flex-direction: column; gap: 0; margin: 4px 0 14px 0; }
.lt-lineage-row { display: grid; grid-template-columns: 92px 1fr; gap: 12px; padding: 8px 0; border-top: 1px solid var(--hair); align-items: baseline; }
.lt-lineage-row:first-child { border-top: none; }
.lt-lineage-who { font-family: var(--font-mono); font-size: 11.5px; color: var(--ink); font-weight: 500; }
.lt-lineage-what { font-size: 15px; line-height: 1.5; color: var(--ink-soft); }

/* ---------- framework: cycle table ---------- */

.lt-cycle-table { display: flex; flex-direction: column; gap: 0; }
.lt-cycle-row { display: grid; grid-template-columns: 1.3fr 1.2fr 1.1fr; gap: 10px; padding: 9px 0; border-top: 1px solid var(--hair); font-size: 13px; align-items: baseline; }
.lt-cycle-row:first-child { border-top: none; }
.lt-cycle-name { font-weight: 600; color: var(--ink); }
.lt-cycle-types { color: var(--ink-soft); }
.lt-cycle-fb { font-family: var(--font-mono); font-size: 12.5px; color: var(--muted); }

/* ---------- build: toggles + coverage ---------- */

.sim-block { border-top: 1px solid var(--hair-strong); padding-top: 22px; display: flex; flex-direction: column; gap: 16px; }
.sim-kicker { margin: 0; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.sim-result { background: var(--card); border: 1px solid var(--hair); border-radius: 8px; padding: 22px 24px; display: flex; flex-direction: column; gap: 12px; }

.lt-toggles { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.lt-toggle { appearance: none; background: none; border: 1px solid var(--hair); border-radius: 7px; padding: 11px 14px; display: flex; align-items: center; gap: 10px; cursor: pointer; font-family: var(--font-ui); color: var(--muted); transition: all 0.15s ease; }
.lt-toggle:hover { border-color: var(--hair-strong); }
.lt-toggle-box { width: 16px; height: 16px; border-radius: 4px; border: 1.6px solid var(--hair-strong); flex: none; transition: all 0.15s ease; }
.lt-toggle-name { font-size: 14px; font-weight: 600; }
.lt-toggle.is-on { border-color: var(--pc); color: var(--ink); }
.lt-toggle.is-on .lt-toggle-box { background: var(--pc); border-color: var(--pc); }

.lt-coverage-head { display: flex; justify-content: space-between; align-items: baseline; }
.lt-coverage-title { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
.lt-coverage-count { font-family: var(--font-mono); font-size: 12.5px; color: var(--ink-soft); }
.lt-coverage-track { display: flex; gap: 5px; }
.lt-coverage-seg { flex: 1; height: 7px; border-radius: 4px; background: var(--inset); transition: background 0.2s ease; }
.lt-coverage-seg.is-on { background: var(--ok); }

/* ---------- cross-link card (matches ../purpose/, ../biesta/) ---------- */

.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); }
.lt-reading { margin: 4px 0 0 0; padding-top: 12px; border-top: 1px solid var(--hair); font-size: 15px; line-height: 1.6; color: var(--ink); }
.lt-reading-ai { color: var(--ai-deep); border-top-color: var(--ai-soft); }

.lt-questions { margin: 4px 0 0 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 12px; }
.lt-questions li { font-family: var(--font-display); font-style: italic; font-size: 17px; line-height: 1.45; color: var(--ink); padding-left: 16px; border-left: 2px solid var(--hair-strong); }

/* ---------- 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); }

/* ---------- 04 · Your Activities (the activity) ---------- */

.lty-reflect { margin: 14px 0 0 0; padding: 10px 12px; background: var(--inset); border-radius: 6px; font-size: 15px; line-height: 1.5; color: var(--ink-soft); }
.lty-accent { border-left: 4px solid var(--ok); }
.lty-accent[data-tone="ai"] { border-left-color: var(--ai); }
.lty-profile { display: flex; flex-wrap: wrap; gap: 6px; margin: 4px 0 8px 0; }
.lty-type { font-size: 13.5px; font-weight: 600; padding: 5px 11px; border-radius: 999px; border: 1px solid var(--hair-strong); color: var(--muted); background: var(--card); }
.lty-type.is-on { color: #fff; background: var(--pc); border-color: var(--pc); }
.lty-small { margin: 8px 0 0 0; font-size: 14px; line-height: 1.5; color: var(--muted); }
.lty-privacy { color: var(--ai); }
.lty-label { display: flex; flex-direction: column; gap: 6px; margin-top: 12px; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.lty-input { box-sizing: border-box; width: 100%; margin-top: 8px; font-family: var(--font-ui); font-size: 15px; letter-spacing: 0; text-transform: none; color: var(--ink); background: #fff; border: 1px solid var(--hair-strong); border-radius: 6px; padding: 9px 11px; }
.lty-label .lty-input { margin-top: 0; }
.lty-textarea { display: block; resize: vertical; line-height: 1.5; }
.lty-input:focus { outline: 2px solid var(--ok); outline-offset: 1px; border-color: var(--ok); }
.lty-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 14px; }
.lty-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; transition: border-color 0.15s ease, background 0.15s ease; }
.lty-btn:hover { border-color: var(--ink); }
.lty-btn-primary { background: var(--ink); color: var(--card); border-color: var(--ink); }
.lty-btn-primary:hover { background: #3a3e33; }
.lty-btn.is-done { background: var(--ok); border-color: var(--ok); color: var(--card); }
.lty-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; }
.lty-subhead { margin: 18px 0 8px 0; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.lty-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 5px; }
.lty-list li { position: relative; padding-left: 20px; font-size: 15px; line-height: 1.5; color: var(--ink-soft); }
.lty-list li::before { content: ""; position: absolute; left: 2px; top: 6px; width: 8px; height: 8px; border-radius: 50%; background: var(--ai); }

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

@media (max-width: 1060px) {
  .layout { grid-template-columns: 1fr; gap: 24px; padding: 24px 24px 48px 24px; }
  .stage { position: static; max-width: 560px; margin: 0 auto; }
  .masthead { padding: 22px 24px 0 24px; }
  .masthead-controls { width: 100%; justify-content: space-between; }
  .colophon { padding: 16px 24px 22px 24px; }
}
@media (max-width: 560px) {
  .masthead-title { font-size: 27px; }
  .lens-tab { padding: 10px 10px 12px 10px; }
  .lens-tab-name { font-size: 14px; }
  .lt-toggles { grid-template-columns: 1fr; }
  .lt-ai-pair { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; animation: none !important; } }

/* tab 01 before a type is chosen: the six in plain words, and one seminar annotated (29 Sep 2026) */
.lt-chip {
  appearance: none; display: inline-flex; align-items: center; gap: 7px; cursor: pointer;
  font: inherit; font-size: 13px; font-weight: 600; color: var(--ink);
  background: var(--card); border: 1px solid var(--pc); border-radius: 999px; padding: 3px 11px 3px 9px;
}
.lt-chip:hover, .lt-chip:focus-visible { background: color-mix(in srgb, var(--pc) 12%, var(--card)); }
.lt-six { list-style: none; margin: 14px 0 12px 0; padding: 0; }
.lt-six-row { padding: 11px 0; border-top: 1px solid var(--hair); }
.lt-six-does { margin: 7px 0 3px 0; font-size: 16px; line-height: 1.5; color: var(--ink); }
.lt-six-fb { margin: 0; font-size: 14.5px; color: var(--ink-soft); }
.lt-six-fb span { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.lt-lesson { list-style: none; margin: 12px 0 14px 0; padding: 0; }
.lt-lesson-row {
  display: grid; grid-template-columns: 58px 1fr auto; gap: 4px 12px; align-items: start;
  padding: 10px 0; border-top: 1px solid var(--hair);
}
.lt-lesson-when { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.04em; color: var(--muted); padding-top: 3px; }
.lt-lesson-what { margin: 0; font-size: 15.5px; line-height: 1.5; color: var(--ink); }
.lt-lesson-row .lt-chip { justify-self: end; }
@media (max-width: 560px) {
  .lt-lesson-row { grid-template-columns: 52px 1fr; }
  .lt-lesson-row .lt-chip { grid-column: 2; justify-self: start; }
}