/* ============================================================
   LearnAI for Teens — visual identity.
   Echoes the adult journey (warm paper, station walk) but
   bolder, punchier, modern sans. Paged: one station at a time.
   Prefix: .lt-
   ============================================================ */
:root {
  --t-bg: #f7f6f3;
  --t-paper: #ffffff;
  --t-ink: #16161d;
  --t-ink-soft: #44444f;
  --t-ink-fade: #84848f;
  --t-line: #e7e4dd;
  --t-accent: #5b53e0;        /* electric indigo — bold, gender-neutral */
  --t-accent-soft: rgba(91, 83, 224, 0.10);
  --t-accent-2: #0ea5a5;      /* teal pop for highlights */
  --t-warn: #d9480f;
  --t-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --t-mono: 'JetBrains Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }
body.lt-page {
  margin: 0;
  background: var(--t-bg);
  color: var(--t-ink);
  font-family: var(--t-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---------- top nav ---------- */
.lt-topnav {
  position: sticky; top: 0; z-index: 40;
  background: rgba(247,246,243,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--t-line);
}
.lt-topnav-inner {
  max-width: 760px; margin: 0 auto; padding: 0.7rem 1.2rem;
  display: flex; align-items: center; gap: 1rem;
}
.lt-brand { display: flex; align-items: center; gap: 0.55rem; text-decoration: none; color: var(--t-ink); font-weight: 800; letter-spacing: -0.02em; }
.lt-brand-mark {
  width: 30px; height: 30px; border-radius: 8px; flex-shrink: 0;
  background: var(--t-accent); color: #fff;
  display: grid; place-items: center; font-size: 0.78rem; font-weight: 800;
}
.lt-brand small { color: var(--t-accent); font-weight: 800; }
.lt-topnav-spacer { flex: 1; }
.lt-count { font-family: var(--t-mono); font-size: 0.72rem; letter-spacing: 0.08em; color: var(--t-ink-fade); white-space: nowrap; }
.lt-dots { display: flex; gap: 5px; }
.lt-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--t-line); border: none; padding: 0; cursor: pointer; transition: background .15s, transform .15s; }
.lt-dot:hover { background: var(--t-accent); }
.lt-dot.current { background: var(--t-accent); transform: scale(1.25); }
.lt-back-link { font-size: 0.8rem; color: var(--t-ink-fade); text-decoration: none; white-space: nowrap; }
.lt-back-link:hover { color: var(--t-accent); }

/* ---------- layout ---------- */
.lt-wrap { max-width: 680px; margin: 0 auto; padding: 1.5rem 1.2rem 4rem; }
.lt-station { display: none; animation: ltFade .35s ease; }
.lt-station.active { display: block; }
@keyframes ltFade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.lt-num { font-family: var(--t-mono); font-size: 0.74rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--t-accent); font-weight: 700; margin-bottom: 0.5rem; }
.lt-station h1 { font-size: 2.05rem; line-height: 1.12; letter-spacing: -0.03em; font-weight: 800; margin: 0 0 0.7rem; }
.lt-station h1 em { font-style: normal; color: var(--t-accent); }
.lt-station h2 { font-size: 1.35rem; letter-spacing: -0.02em; font-weight: 800; margin: 2rem 0 0.6rem; }
.lt-lede { font-size: 1.12rem; line-height: 1.6; color: var(--t-ink-soft); margin: 0 0 1.2rem; }
.lt-station p { font-size: 1.02rem; line-height: 1.65; color: var(--t-ink-soft); margin: 0 0 1rem; }
.lt-station p strong { color: var(--t-ink); }

/* ---------- station hero image (papercut) ---------- */
.lt-hero { width: 100%; display: block; border-radius: 14px; margin: 0.2rem 0 1.3rem; box-shadow: 0 4px 16px rgba(22,22,29,0.10); }

.lt-goal { display: flex; gap: 0.7rem; align-items: flex-start; padding: 0.8rem 1rem; background: var(--t-accent-soft); border-radius: 10px; margin: 0 0 1.4rem; }
.lt-goal-eyebrow { font-family: var(--t-mono); font-size: 0.64rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--t-accent); font-weight: 700; flex-shrink: 0; padding-top: 0.15rem; }
.lt-goal-text { font-size: 0.95rem; color: var(--t-ink); font-weight: 500; }

/* ---------- buttons ---------- */
.lt-btn { font-family: var(--t-sans); font-size: 0.95rem; font-weight: 700; border-radius: 10px; padding: 0.7rem 1.3rem; border: 2px solid var(--t-accent); cursor: pointer; transition: transform .12s, background .15s; display: inline-flex; align-items: center; gap: 0.4rem; text-decoration: none; }
.lt-btn-primary { background: var(--t-accent); color: #fff; }
.lt-btn-primary:hover { transform: translateY(-1px); }
.lt-btn-ghost { background: transparent; color: var(--t-accent); }
.lt-btn-ghost:hover { background: var(--t-accent-soft); }
.lt-btn[disabled] { opacity: 0.4; cursor: not-allowed; transform: none; }
[data-next-pulse] { animation: ltPulse 1.6s ease-in-out infinite; }
@keyframes ltPulse { 0%,100% { box-shadow: 0 0 0 0 var(--t-accent-soft); } 50% { box-shadow: 0 0 0 7px var(--t-accent-soft); } }

/* ---------- cards / insight / takeaway ---------- */
.lt-card { background: var(--t-paper); border: 1px solid var(--t-line); border-radius: 14px; padding: 1.2rem 1.3rem; margin: 1rem 0; }
.lt-insight { display: none; margin: 1.4rem 0; padding: 1.2rem 1.3rem; background: #16161d; color: #e7e7ee; border-radius: 14px; }
.lt-insight.visible { display: block; animation: ltFade .3s ease; }
.lt-insight-eyebrow { font-family: var(--t-mono); font-size: 0.66rem; letter-spacing: 0.14em; text-transform: uppercase; color: #b9b4ff; font-weight: 700; margin-bottom: 0.4rem; }
.lt-insight-lead { font-size: 1.2rem; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 0.6rem; }
.lt-insight p { color: #c9c9d6; font-size: 0.98rem; margin: 0 0 0.7rem; }
.lt-insight p:last-child { margin-bottom: 0; }
.lt-station .lt-insight strong { color: #fff; }
.lt-takeaway { margin: 1.6rem 0 0.6rem; padding: 1rem 1.2rem; background: var(--t-accent-soft); border-left: 4px solid var(--t-accent); border-radius: 0 10px 10px 0; }
.lt-takeaway-eyebrow { display: block; font-family: var(--t-mono); font-size: 0.66rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--t-accent); font-weight: 700; margin-bottom: 0.4rem; }
.lt-takeaway ul { margin: 0; padding-left: 1.2rem; }
.lt-takeaway li { color: var(--t-ink); margin: 0.2rem 0; }

/* ---------- AI4K12 Big Idea tag ---------- */
.lt-bigidea { margin-top: 1.5rem; padding-top: 0.9rem; border-top: 1px dashed var(--t-line); font-size: 0.84rem; line-height: 1.5; color: var(--t-ink-fade); }
.lt-bigidea a { color: var(--t-accent); font-family: var(--t-mono); font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 700; text-decoration: none; }
.lt-bigidea a:hover { text-decoration: underline; }
.lt-bigidea strong { color: var(--t-ink-soft); }

/* ---------- controls ---------- */
.lt-controls { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-top: 1.6rem; padding-top: 1.2rem; border-top: 1px solid var(--t-line); }

/* ---------- Station 3: the feed ---------- */
.lt-feed { display: grid; gap: 0.7rem; margin: 1rem 0; }
.lt-feed-card { background: var(--t-paper); border: 1px solid var(--t-line); border-radius: 12px; padding: 0.85rem 1rem; display: flex; align-items: center; gap: 0.85rem; }
.lt-feed-emoji { width: 44px; height: 44px; border-radius: 10px; background: var(--t-accent-soft); display: grid; place-items: center; font-size: 1.4rem; flex-shrink: 0; }
.lt-feed-body { flex: 1; min-width: 0; }
.lt-feed-title { font-weight: 700; font-size: 0.98rem; color: var(--t-ink); }
.lt-feed-cat { font-family: var(--t-mono); font-size: 0.66rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--t-ink-fade); }
.lt-feed-watch { font-family: var(--t-sans); font-weight: 700; font-size: 0.82rem; color: var(--t-accent); background: var(--t-accent-soft); border: none; border-radius: 8px; padding: 0.45rem 0.8rem; cursor: pointer; white-space: nowrap; }
.lt-feed-watch:hover { background: var(--t-accent); color: #fff; }
.lt-feed-card[data-watched] { border-color: var(--t-accent); }
.lt-feed-card[data-escalated] .lt-feed-emoji { background: rgba(217,72,15,0.12); }
.lt-feed-card[data-escalated] .lt-feed-cat { color: var(--t-warn); }
.lt-feed-readout { margin: 1rem 0; padding: 0.85rem 1rem; border: 1px dashed var(--t-accent); border-radius: 10px; font-size: 0.95rem; color: var(--t-ink); }
.lt-feed-readout strong { color: var(--t-accent); }

/* ---------- photos (likeness) ---------- */
.lt-photo { width: 100%; max-width: 270px; border-radius: 14px; display: block; margin: 0.9rem auto; box-shadow: 0 3px 12px rgba(0,0,0,0.14); }
.lt-photo-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.8rem; margin: 1rem 0; }
.lt-photo-row figure { margin: 0; }
.lt-photo-row img.lt-photo { max-width: 100%; margin: 0 0 0.35rem; }
.lt-photo-row figcaption { font-family: var(--t-mono); font-size: 0.64rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--t-warn); text-align: center; font-weight: 700; }

/* ---------- homework sort ---------- */
.lt-hw-scenario { background: var(--t-accent-soft); border-radius: 10px; padding: 0.9rem 1rem; font-size: 1.02rem; font-weight: 600; color: var(--t-ink); margin-bottom: 0.7rem; }
.lt-hw-choice { display: block; width: 100%; text-align: left; background: var(--t-paper); border: 2px solid var(--t-line); border-radius: 10px; padding: 0.7rem 0.95rem; margin: 0.45rem 0; font-family: var(--t-sans); font-weight: 600; font-size: 0.96rem; color: var(--t-ink); cursor: pointer; }
.lt-hw-choice:hover:not([disabled]) { border-color: var(--t-accent); }
.lt-hw-choice[disabled] { cursor: default; }
.lt-hw-choice[data-state="right"] { border-color: var(--t-accent-2); background: rgba(14,165,165,0.10); }
.lt-hw-choice[data-state="wrong"] { border-color: var(--t-warn); background: rgba(217,72,15,0.07); }
.lt-hw-feedback { display: none; margin-top: 0.8rem; padding: 0.85rem 1rem; border-radius: 10px; background: #16161d; color: #d7d7e0; font-size: 0.95rem; line-height: 1.5; }
.lt-hw-feedback.visible { display: block; }
.lt-hw-count { font-family: var(--t-mono); font-size: 0.72rem; color: var(--t-ink-fade); margin-top: 0.8rem; }

/* ---------- be-the-AI predictor ---------- */
.lt-pred { background: var(--t-paper); border: 1px solid var(--t-line); border-radius: 14px; padding: 1.1rem 1.2rem; margin: 1rem 0; }
.lt-pred-sentence { font-size: 1.15rem; font-weight: 700; color: var(--t-ink); line-height: 1.45; margin-bottom: 0.9rem; min-height: 2.6em; }
.lt-pred-label { font-family: var(--t-mono); font-size: 0.66rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--t-ink-fade); margin-bottom: 0.5rem; }
.lt-pred-options { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; }
.lt-pred-opt { font-family: var(--t-sans); font-weight: 700; color: var(--t-accent); background: var(--t-accent-soft); border: 2px solid var(--t-accent); border-radius: 999px; padding: 0.4rem 0.9rem; cursor: pointer; display: inline-flex; align-items: center; gap: 0.35rem; font-size: calc(0.82rem + (var(--w, 10) * 0.006rem)); }
.lt-pred-opt:hover { background: var(--t-accent); color: #fff; }
.lt-pred-pct { font-family: var(--t-mono); font-size: 0.6rem; opacity: 0.65; }
.lt-pred-done { display: none; margin-top: 0.3rem; padding: 0.9rem 1rem; background: #16161d; color: #d7d7e0; border-radius: 10px; font-size: 0.95rem; line-height: 1.55; }
.lt-pred-done.visible { display: block; }

/* ---------- St.5 · extend the thinking (spot the lean) ---------- */
.lt-lean { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.8rem 0 0; }
.lt-lean-pick { font-family: var(--t-sans); font-weight: 700; font-size: 0.9rem; color: var(--t-accent); background: var(--t-accent-soft); border: 2px solid var(--t-accent); border-radius: 999px; padding: 0.45rem 0.9rem; cursor: pointer; }
.lt-lean-pick:hover, .lt-lean-pick.active { background: var(--t-accent); color: #fff; }
.lt-lean-reveal { display: none; flex-basis: 100%; margin-top: 0.7rem; padding: 0.85rem 1rem; background: #16161d; color: #d7d7e0; border-radius: 12px; font-size: 0.95rem; line-height: 1.55; }
.lt-lean-reveal.visible { display: block; animation: ltFade .25s ease; }
.lt-lean-lean { font-weight: 700; color: #fff; margin-bottom: 0.3rem; }
.lt-lean-tag { font-family: var(--t-mono); font-size: 0.62rem; letter-spacing: 0.1em; text-transform: uppercase; color: #b9b4ff; margin-right: 0.3rem; }
.lt-lean-real strong { color: #fff; }

/* ---------- prompt builder ---------- */
.lt-pb { background: var(--t-paper); border: 1px solid var(--t-line); border-radius: 14px; padding: 1rem 1.1rem; margin: 1rem 0; }
.lt-pb-label, .lt-pb-answer-label { font-family: var(--t-mono); font-size: 0.64rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--t-ink-fade); margin-bottom: 0.35rem; }
.lt-pb-answer-label { margin-top: 1.1rem; }
.lt-pb-prompt { background: var(--t-accent-soft); border-radius: 10px; padding: 0.75rem 0.95rem; font-size: 0.98rem; color: var(--t-ink); line-height: 1.5; }
.lt-pb-adds { display: flex; flex-wrap: wrap; gap: 0.45rem; margin: 0.75rem 0 0; }
.lt-pb-add { font-family: var(--t-sans); font-weight: 700; font-size: 0.82rem; color: var(--t-accent); background: var(--t-accent-soft); border: 1.5px dashed var(--t-accent); border-radius: 999px; padding: 0.4rem 0.85rem; cursor: pointer; }
.lt-pb-add:hover:not([disabled]) { background: var(--t-accent); color: #fff; }
.lt-pb-add[disabled] { opacity: 0.45; border-style: solid; cursor: default; }
.lt-pb-answer { background: #16161d; color: #d7d7e0; border-radius: 10px; padding: 0.85rem 1rem; font-size: 0.95rem; line-height: 1.55; }

/* ---------- AI-friend sycophancy ---------- */
.lt-syco { margin: 0.6rem 0 0; }
.lt-syco-pick { display: block; width: 100%; text-align: left; background: var(--t-paper); border: 2px solid var(--t-line); border-radius: 10px; padding: 0.7rem 0.9rem; margin: 0.45rem 0; font-family: var(--t-sans); font-weight: 600; font-size: 0.95rem; color: var(--t-ink); cursor: pointer; }
.lt-syco-pick:hover { border-color: var(--t-accent); }
.lt-syco-reply { display: none; }
.lt-syco-reply.visible { display: block; }
.lt-syco-ai { background: var(--t-accent-soft); border-radius: 10px; padding: 0.75rem 0.95rem; margin-top: 0.7rem; font-style: italic; color: var(--t-ink); }
.lt-syco-real { background: #16161d; color: #d7d7e0; border-radius: 10px; padding: 0.75rem 0.95rem; margin-top: 0.5rem; font-size: 0.93rem; line-height: 1.5; }

/* ---------- "Go deeper" expanders ---------- */
.lt-deeper { background: var(--t-paper); border: 1px solid var(--t-line); border-radius: 10px; margin: 0.5rem 0; padding: 0 0.95rem; }
.lt-deeper[open] { border-color: var(--t-accent); }
.lt-deeper summary { cursor: pointer; font-weight: 700; font-size: 0.96rem; color: var(--t-ink); padding: 0.75rem 0; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 0.5rem; }
.lt-deeper summary::-webkit-details-marker { display: none; }
.lt-deeper summary::after { content: "+"; font-family: var(--t-mono); color: var(--t-accent); font-size: 1.2rem; font-weight: 700; line-height: 1; }
.lt-deeper[open] summary::after { content: "−"; }
.lt-deeper p { margin: 0 0 0.85rem; font-size: 0.95rem; color: var(--t-ink-soft); line-height: 1.55; }
.lt-deeper p:first-of-type { margin-top: 0.1rem; }

/* ---------- St.3a · tokenizer playground ---------- */
.lt-tok { background: var(--t-paper); border: 1px solid var(--t-line); border-radius: 14px; padding: 1.1rem 1.2rem; margin: 1rem 0; }
.lt-tok-input { width: 100%; font-family: var(--t-mono); font-size: 1.05rem; font-weight: 600; color: var(--t-ink); border: 2px solid var(--t-line); border-radius: 10px; padding: 0.6rem 0.8rem; background: var(--t-bg); }
.lt-tok-input:focus { outline: none; border-color: var(--t-accent); }
.lt-tok-presets { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0.6rem 0 0.2rem; }
.lt-tok-preset { font-family: var(--t-mono); font-size: 0.78rem; font-weight: 600; color: var(--t-ink-soft); background: var(--t-bg); border: 1px solid var(--t-line); border-radius: 999px; padding: 0.25rem 0.7rem; cursor: pointer; }
.lt-tok-preset:hover { border-color: var(--t-accent); color: var(--t-accent); }
.lt-tok-chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 0.9rem 0 0.7rem; min-height: 2.8rem; align-items: stretch; }
.lt-tok-chip { display: inline-flex; flex-direction: column; align-items: center; gap: 1px; font-family: var(--t-mono); font-weight: 700; padding: 0.3rem 0.55rem; border-radius: 7px; color: #fff; animation: ltFade .25s ease; }
.lt-tok-chip[data-i="0"] { background: var(--t-accent); }
.lt-tok-chip[data-i="1"] { background: var(--t-accent-2); }
.lt-tok-txt { font-size: 0.95rem; line-height: 1.2; }
.lt-tok-id { font-size: 0.56rem; font-weight: 600; opacity: 0.72; letter-spacing: 0.02em; }
.lt-tok-readout { font-size: 0.95rem; color: var(--t-ink-soft); }
.lt-tok-readout strong { color: var(--t-accent); font-family: var(--t-mono); }

/* ---------- St.3b · training pipeline diagram ---------- */
.lt-pipe { display: flex; align-items: stretch; gap: 3px; margin: 0.5rem 0 1rem; overflow-x: auto; padding-bottom: 0.3rem; }
.lt-pipe-step { flex: 1 1 0; min-width: 76px; background: var(--t-paper); border: 1.5px solid var(--t-line); border-radius: 10px; padding: 0.6rem 0.35rem; display: flex; flex-direction: column; align-items: center; gap: 0.3rem; text-align: center; }
.lt-pipe-n { width: 22px; height: 22px; border-radius: 50%; background: var(--t-accent); color: #fff; font-family: var(--t-mono); font-weight: 700; font-size: 0.76rem; display: grid; place-items: center; }
.lt-pipe-emoji { font-size: 1.25rem; line-height: 1.25; }
.lt-pipe-label { font-weight: 700; font-size: 0.8rem; color: var(--t-ink); display: flex; flex-direction: column; line-height: 1.15; }
.lt-pipe-label small { font-weight: 500; font-size: 0.64rem; color: var(--t-ink-fade); margin-top: 0.15rem; }
.lt-pipe-arrow { align-self: center; color: var(--t-accent); font-weight: 700; flex-shrink: 0; font-size: 0.9rem; }
.lt-pipe-bot { border-color: var(--t-accent); border-style: dashed; }

/* ---------- St.3b · train-the-model ---------- */
.lt-train { background: var(--t-paper); border: 1px solid var(--t-line); border-radius: 14px; padding: 1.1rem 1.2rem; margin: 1rem 0; }
.lt-train-stage { font-family: var(--t-mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--t-accent); font-weight: 700; margin-bottom: 0.5rem; }
.lt-train-q { font-size: 1.02rem; font-weight: 600; color: var(--t-ink); margin-bottom: 0.7rem; }
.lt-train-lead { display: block; font-size: 1.2rem; font-weight: 800; color: var(--t-ink); margin-bottom: 0.5rem; }
.lt-train-opts { display: flex; flex-direction: column; gap: 0.45rem; }
.lt-train-opt { text-align: left; width: 100%; background: var(--t-bg); border: 2px solid var(--t-line); border-radius: 10px; padding: 0.7rem 0.9rem; font-family: var(--t-sans); font-weight: 600; font-size: 0.95rem; color: var(--t-ink); cursor: pointer; }
.lt-train-opt:hover:not([disabled]) { border-color: var(--t-accent); }
.lt-train-opt[disabled] { cursor: default; }
.lt-train-opt[data-state="good"] { border-color: var(--t-accent-2); background: rgba(14,165,165,0.10); }
.lt-train-opt[data-state="pick"] { border-color: var(--t-accent); background: var(--t-accent-soft); }
.lt-train-fb { display: none; margin-top: 0.8rem; padding: 0.85rem 1rem; border-radius: 10px; background: #16161d; color: #d7d7e0; font-size: 0.95rem; line-height: 1.55; }
.lt-train-fb.visible { display: block; animation: ltFade .25s ease; }
.lt-train-fb strong { color: #fff; }
.lt-train-fb em { color: #b9b4ff; font-style: normal; }
.lt-train-next { margin-top: 0.9rem; }
.lt-train-done { display: none; margin-top: 0.4rem; padding: 1.1rem 1.2rem; background: #16161d; color: #c9c9d6; border-radius: 14px; font-size: 0.98rem; line-height: 1.6; }
.lt-train-done.visible { display: block; animation: ltFade .3s ease; }
.lt-train-done strong { color: #fff; }
.lt-train-done .lt-insight-eyebrow { color: #b9b4ff; }

/* ---------- St.5 · bias pile ---------- */
.lt-pile { background: var(--t-paper); border: 1px solid var(--t-line); border-radius: 14px; padding: 1.1rem 1.2rem; margin: 1rem 0; }
.lt-pile-prompt { font-size: 0.98rem; color: var(--t-ink-soft); margin-bottom: 0.8rem; }
.lt-pile-grid { display: grid; grid-template-columns: repeat(8, 1fr); gap: 6px; margin-bottom: 0.8rem; }
.lt-pile-card { aspect-ratio: 1; display: grid; place-items: center; font-size: 1.5rem; background: var(--t-bg); border: 1px solid var(--t-line); border-radius: 9px; animation: ltFade .25s ease; }
.lt-pile-count { font-family: var(--t-mono); font-size: 0.8rem; color: var(--t-ink-soft); margin-bottom: 0.5rem; }
.lt-pile-count strong { color: var(--t-warn); }
.lt-pile-verdict { font-size: 1rem; color: var(--t-ink); padding: 0.7rem 0.9rem; background: var(--t-accent-soft); border-radius: 10px; margin-bottom: 0.8rem; }
.lt-pile-tag { font-family: var(--t-mono); font-size: 0.66rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--t-accent); font-weight: 700; margin-right: 0.35rem; }
.lt-pile-btns { display: flex; }
.lt-pile-btns .lt-btn[disabled] { border-color: var(--t-accent-2); color: var(--t-accent-2); }

/* ---------- St.10 · redact game ---------- */
.lt-redact { background: var(--t-paper); border: 1px solid var(--t-line); border-radius: 14px; padding: 1.1rem 1.2rem; margin: 1rem 0; }
.lt-redact-label { font-family: var(--t-mono); font-size: 0.64rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--t-ink-fade); margin-bottom: 0.5rem; }
.lt-redact-msg { font-size: 1.05rem; line-height: 2.1; color: var(--t-ink); margin-bottom: 1rem; }
.lt-redact-span { font: inherit; color: var(--t-accent); background: var(--t-accent-soft); border: 1px dashed var(--t-accent); border-radius: 6px; padding: 0.1rem 0.35rem; margin: 0 1px; cursor: pointer; }
.lt-redact-span:hover { background: var(--t-accent); color: #fff; }
.lt-redact-span.redacted { color: transparent; background: #16161d; border-color: #16161d; }
.lt-redact-span.redacted:hover { background: #16161d; }
.lt-redact-fb { display: none; margin-top: 0.9rem; padding: 0.85rem 1rem; border-radius: 10px; font-size: 0.95rem; line-height: 1.55; }
.lt-redact-fb.visible { display: block; animation: ltFade .25s ease; }
.lt-redact-fb.good { background: rgba(14,165,165,0.12); color: var(--t-ink); border: 1px solid var(--t-accent-2); }
.lt-redact-fb.bad { background: rgba(217,72,15,0.08); color: var(--t-ink); border: 1px solid var(--t-warn); }
.lt-redact-fb strong { color: var(--t-ink); }

/* ---------- St.11 · commit ---------- */
.lt-commit { margin: 0.6rem 0 0; }
.lt-commit-opt { display: block; width: 100%; text-align: left; background: var(--t-paper); border: 2px solid var(--t-line); border-radius: 10px; padding: 0.7rem 0.9rem; margin: 0.45rem 0; font-family: var(--t-sans); font-weight: 600; font-size: 0.96rem; color: var(--t-ink); cursor: pointer; }
.lt-commit-opt:hover { border-color: var(--t-accent); }
.lt-commit-opt.chosen { border-color: var(--t-accent); background: var(--t-accent-soft); color: var(--t-accent); }
.lt-commit-done { display: none; margin-top: 0.8rem; padding: 0.9rem 1.1rem; background: #16161d; color: #d7d7e0; border-radius: 12px; font-size: 0.97rem; line-height: 1.55; }
.lt-commit-done.visible { display: block; animation: ltFade .25s ease; }
.lt-commit-done strong { color: #fff; }
.lt-commit-done em { color: #b9b4ff; font-style: normal; }

/* ---------- teen hub (landing page) ---------- */
.lt-hub-hero { padding: 1.5rem 0 0.5rem; }
.lt-hub-eyebrow { font-family: var(--t-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--t-accent); font-weight: 700; }
.lt-hub-hero h1 { font-size: 2.2rem; line-height: 1.1; letter-spacing: -0.03em; font-weight: 800; margin: 0.5rem 0 0.7rem; }
.lt-hub-hero h1 em { font-style: normal; color: var(--t-accent); }
.lt-hub-cta-row { display: flex; align-items: center; gap: 0.9rem; flex-wrap: wrap; margin-top: 1.1rem; }
.lt-hub-cta-note { font-size: 0.9rem; color: var(--t-ink-fade); }
.lt-hub-h2 { font-size: 1.5rem; font-weight: 800; letter-spacing: -0.02em; margin: 2.2rem 0 0.3rem; }
.lt-hub-sub { color: var(--t-ink-soft); font-size: 1rem; margin: 0 0 1.2rem; }
.lt-hub-board { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.lt-hub-card { display: flex; flex-direction: column; background: var(--t-paper); border: 1px solid var(--t-line); border-radius: 14px; overflow: hidden; text-decoration: none; color: var(--t-ink); transition: transform .15s, box-shadow .15s, border-color .15s; }
.lt-hub-card:hover { transform: translateY(-3px); box-shadow: 0 8px 22px rgba(22,22,29,0.10); border-color: var(--t-accent); }
.lt-hub-img { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: var(--t-bg); }
.lt-hub-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.lt-hub-num { position: absolute; top: 0.6rem; left: 0.6rem; z-index: 1; font-family: var(--t-mono); font-weight: 800; font-size: 0.78rem; color: #fff; background: var(--t-accent); border-radius: 7px; padding: 0.2rem 0.5rem; }
.lt-hub-body { padding: 0.9rem 1rem 1.1rem; }
.lt-hub-title { font-weight: 800; font-size: 1.05rem; letter-spacing: -0.01em; margin-bottom: 0.25rem; }
.lt-hub-desc { font-size: 0.9rem; color: var(--t-ink-soft); line-height: 1.45; }
.lt-hub-note { margin: 2rem 0 0; padding: 1.1rem 1.3rem; background: var(--t-accent-soft); border-radius: 12px; }
.lt-hub-note p { font-size: 0.92rem; color: var(--t-ink-soft); line-height: 1.6; margin: 0; }
.lt-hub-note a { color: var(--t-accent); font-weight: 700; }
.lt-hub-footer { max-width: 680px; margin: 2rem auto 0; padding: 1.4rem 1.2rem 3rem; border-top: 1px solid var(--t-line); font-size: 0.85rem; color: var(--t-ink-fade); }
.lt-hub-footer a { color: var(--t-accent); text-decoration: none; }
.lt-hub-footer a:hover { text-decoration: underline; }

@media (max-width: 560px) {
  .lt-station h1 { font-size: 1.7rem; }
  .lt-back-link { display: none; }
  .lt-wrap { padding-top: 1.1rem; }
  .lt-pile-card { font-size: 1.15rem; }
  .lt-hub-board { grid-template-columns: 1fr; }
  .lt-hub-hero h1 { font-size: 1.7rem; }
}
@media (max-width: 480px) { .lt-photo-row { grid-template-columns: 1fr; } }

/* ===== Take-home prompt toolkit (Station 12) ===== */
.lt-toolkit { margin: 1.2rem 0 0.4rem; display: grid; gap: 0.7rem; }
.lt-tip { background: var(--t-paper); border: 1px solid var(--t-line); border-left: 4px solid var(--t-accent); border-radius: 0 12px 12px 0; padding: 0.9rem 1.1rem; }
.lt-tip-head { font-weight: 800; color: var(--t-ink); margin-bottom: 0.35rem; font-size: 1.02rem; }
.lt-tip-head span { font-family: var(--t-mono); color: var(--t-accent); margin-right: 0.55rem; font-size: 0.82rem; }
.lt-tip p { margin: 0 0 0.55rem; font-size: 0.93rem; color: var(--t-ink); }
.lt-tip-eg { display: block; font-family: var(--t-mono); font-size: 0.82rem; line-height: 1.5; color: var(--t-accent); background: var(--t-accent-soft); border-radius: 8px; padding: 0.55rem 0.75rem; }