/* ============================================================
   sbmcq.css  "Attack the Stimulus MCQ" walkthrough
   Namespaced .walk-* / .wk-* so it never collides with the inline
   CSS inside each unit page. Accent falls back to each unit's --red.
   ============================================================ */

.sbmcq-root{
  --walk-accent: var(--red, #6b4a2b);
  --walk-accent-d: var(--red-d, #4a3016);
  --walk-ink: var(--ink, #1a1a12);
  --walk-mid: var(--mid, #48483a);
  --walk-muted: var(--muted, #7a7860);
  --walk-paper: var(--paper, #f3ece0);
  --walk-cream: var(--cream, #f9f6ef);
  --walk-border: var(--border, #ddd0b8);
  --walk-border2: var(--border2, #b8a478);
  --walk-green: #2e6b34;
  --walk-green-bg: #e7f2e7;
  --walk-red: #a8321f;
  --walk-red-bg: #f7ece9;
  --walk-hl-q: #fde68a;      /* highlighter yellow for the question trigger */
  --walk-hl-s: #bfe3c2;      /* highlighter green for the stimulus key phrase */
  font-family: 'Source Serif 4', Georgia, serif;
  color: var(--walk-ink);
}

/* ---------- intro / method strip ---------- */
.walk-intro{background:var(--walk-cream);border:1px solid var(--walk-border);border-left:5px solid var(--walk-accent);padding:20px 24px;margin-bottom:22px;border-radius:4px}
.walk-intro h3{font-family:'Playfair Display',Georgia,serif;font-size:1.25rem;margin:0 0 6px;color:var(--walk-ink)}
.walk-intro p{margin:0;font-size:.92rem;line-height:1.65;color:var(--walk-mid)}

.walk-method{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:0 0 26px}
.walk-method-step{background:#fff;border:1px solid var(--walk-border);border-top:3px solid var(--walk-accent);padding:14px 15px;border-radius:4px}
.walk-method-num{font-family:'IBM Plex Mono',monospace;font-size:.7rem;letter-spacing:.12em;color:var(--walk-accent);font-weight:600;text-transform:uppercase}
.walk-method-step h4{margin:6px 0 4px;font-size:.95rem;color:var(--walk-ink)}
.walk-method-step p{margin:0;font-size:.82rem;line-height:1.55;color:var(--walk-muted)}
@media(max-width:820px){.walk-method{grid-template-columns:repeat(2,1fr)}}

/* ---------- 5-type cheat sheet ---------- */
.walk-cheat-label{font-family:'IBM Plex Mono',monospace;font-size:.72rem;letter-spacing:.05em;text-transform:uppercase;color:var(--walk-muted);margin:0 0 12px}
.walk-cheat{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px;margin-bottom:30px}
.walk-cheat-card{border:1px solid var(--walk-border);border-radius:4px;overflow:hidden;background:#fff}
.walk-cheat-hd{padding:10px 14px;color:#fff;font-family:'IBM Plex Mono',monospace;font-size:.74rem;letter-spacing:.04em;text-transform:uppercase;font-weight:600}
.walk-cheat-bd{padding:12px 14px}
.walk-cheat-cue{font-size:.78rem;font-style:italic;color:var(--walk-accent);margin:0 0 8px}
.walk-cheat-bd .lbl{font-family:'IBM Plex Mono',monospace;font-size:.62rem;letter-spacing:.06em;text-transform:uppercase;color:var(--walk-muted);display:block;margin-top:8px}
.walk-cheat-bd p{margin:2px 0 0;font-size:.82rem;line-height:1.5;color:var(--walk-mid)}
.walk-cheat-bd .trap{color:var(--walk-red)}

.wt-bestillustrates{background:#7a4a1e}
.wt-context{background:#1e5a5c}
.wt-causation{background:#8a2a1a}
.wt-purpose{background:#4a3a7a}
.wt-similar{background:#2e5a2e}
.walk-badge{display:inline-block;color:#fff;font-family:'IBM Plex Mono',monospace;font-size:.62rem;letter-spacing:.05em;text-transform:uppercase;font-weight:600;padding:3px 9px;border-radius:3px}

/* ---------- unit selector + group headers ---------- */
.walk-unitsel{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 24px;align-items:center}
.walk-unitsel .lbl{font-family:'IBM Plex Mono',monospace;font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;color:var(--walk-muted);margin-right:4px}
.walk-ubtn{font-family:'IBM Plex Mono',monospace;font-size:.78rem;padding:7px 14px;border:1px solid var(--walk-border2);background:#fff;color:var(--walk-mid);cursor:pointer;border-radius:3px;transition:all .15s}
.walk-ubtn:hover{background:var(--walk-cream)}
.walk-ubtn.active{background:var(--walk-accent);color:#fff;border-color:var(--walk-accent)}
.walk-groupttl{font-family:'Playfair Display',Georgia,serif;font-size:1.35rem;color:var(--walk-ink);margin:30px 0 14px;padding-top:8px;border-top:2px solid var(--walk-border)}
.walk-empty{padding:26px;text-align:center;color:var(--walk-muted);font-style:italic;border:1px dashed var(--walk-border2);border-radius:5px;background:var(--walk-cream)}

/* ============================================================
   WORKED EXAMPLE CARD (.wk)
   ============================================================ */
.wk{border:1px solid var(--walk-border);border-radius:6px;background:#fff;margin-bottom:26px;overflow:hidden;box-shadow:0 2px 10px rgba(0,0,0,.05)}
.wk-head{display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding:12px 18px;background:var(--walk-cream);border-bottom:1px solid var(--walk-border)}
.wk-topic{font-family:'IBM Plex Mono',monospace;font-size:.7rem;color:var(--walk-muted);letter-spacing:.03em}

.wk-body{display:grid;grid-template-columns:1.35fr 1fr;gap:0;align-items:start}
@media(max-width:860px){.wk-body{grid-template-columns:1fr}}

/* --- the document (left) --- */
.wk-doc{padding:20px 22px;border-right:1px solid var(--walk-border)}
@media(max-width:860px){.wk-doc{border-right:none;border-bottom:1px solid var(--walk-border)}}
.wk-stim p{font-size:.94rem;line-height:1.75;color:var(--walk-ink);margin:0 0 12px}
.wk-stim p:last-child{margin-bottom:0}

/* highlighter marks: invisible until their step */
.wk-stim mark.hs,.wk-q mark.hq{background:transparent;color:inherit;padding:0 1px;border-radius:2px;text-decoration:none;box-decoration-break:clone;-webkit-box-decoration-break:clone;transition:background .4s ease,box-shadow .4s ease}
.wk[data-step="3"] .wk-stim mark.hs,.wk[data-step="4"] .wk-stim mark.hs{background:var(--walk-hl-s);box-shadow:0 0 0 1px rgba(46,107,52,.25);text-decoration:underline;text-decoration-color:var(--walk-green);text-underline-offset:3px}
.wk[data-step="2"] .wk-q mark.hq,.wk[data-step="3"] .wk-q mark.hq,.wk[data-step="4"] .wk-q mark.hq{background:var(--walk-hl-q);box-shadow:0 0 0 1px rgba(180,140,20,.3);text-decoration:underline;text-decoration-color:#b08a14;text-underline-offset:3px}

/* source line: glows on step 1 */
.wk-srcbar{margin:14px 0;padding:10px 14px;border:1px solid var(--walk-border);border-left:3px solid var(--walk-border2);background:var(--walk-cream);border-radius:3px;font-size:.8rem;color:var(--walk-mid);transition:box-shadow .4s ease,background .4s ease,border-color .4s ease}
.wk-srclabel{display:block;font-family:'IBM Plex Mono',monospace;font-size:.6rem;letter-spacing:.06em;text-transform:uppercase;color:var(--walk-muted);margin-bottom:3px}
.wk-srctext{font-style:italic}
.wk[data-step="1"] .wk-srcbar{background:#fff;border-left-color:var(--walk-accent);box-shadow:0 0 0 3px rgba(107,74,43,.14);border-color:var(--walk-accent)}

.wk-q{font-weight:600;font-size:.95rem;line-height:1.6;color:var(--walk-ink);margin:16px 0 12px}
.wk-opts{list-style:none;margin:0;padding:0}
.wk-opts li{display:flex;gap:10px;align-items:flex-start;padding:9px 12px;border:1px solid var(--walk-border);border-radius:4px;margin-bottom:7px;font-size:.86rem;line-height:1.5;color:var(--walk-mid);transition:background .3s,border-color .3s}
.wk-ol{font-family:'IBM Plex Mono',monospace;color:var(--walk-muted);flex-shrink:0;font-weight:600}
.wk-otext{flex:1}
.wk-mark{flex-shrink:0;font-family:'IBM Plex Mono',monospace;font-size:.66rem;font-weight:600}
.wk[data-step="4"] .wk-opts li.is-correct{background:var(--walk-green-bg);border-color:var(--walk-green);color:var(--walk-green)}
.wk[data-step="4"] .wk-opts li.is-correct .wk-mark::after{content:'✓ correct';color:var(--walk-green)}
.wk[data-step="4"] .wk-opts li.is-trap{background:var(--walk-red-bg);border-color:var(--walk-red);color:var(--walk-red)}
.wk[data-step="4"] .wk-opts li.is-trap .wk-mark::after{content:'✗ trap';color:var(--walk-red)}

/* --- the coach panel (right) --- */
.wk-coach{padding:20px 22px;background:#fbf9f4;display:flex;flex-direction:column}
.wk-coach-step{display:none}
.wk[data-step="1"] .wk-coach-step[data-for="1"],
.wk[data-step="2"] .wk-coach-step[data-for="2"],
.wk[data-step="3"] .wk-coach-step[data-for="3"],
.wk[data-step="4"] .wk-coach-step[data-for="4"]{display:block;animation:walkFade .3s ease}
@keyframes walkFade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.wk-coach-h{font-family:'IBM Plex Mono',monospace;font-size:.72rem;letter-spacing:.05em;text-transform:uppercase;color:var(--walk-accent);font-weight:600;margin-bottom:8px}
.wk-coach-lead{font-size:.82rem;line-height:1.5;color:var(--walk-muted);margin:0 0 8px}
.wk-coach-step p{font-size:.86rem;line-height:1.55;color:var(--walk-mid)}
.wk-note{font-size:.87rem;line-height:1.55;color:var(--walk-ink);margin:0 0 12px}

/* pulled quote from the stimulus / question */
.wk-quote{position:relative;background:#fff;border:1px solid var(--walk-border);border-left:3px solid var(--walk-accent);border-radius:0 4px 4px 0;padding:9px 12px 9px 30px;margin:0 0 12px;font-style:italic;font-size:.85rem;line-height:1.5;color:var(--walk-ink)}
.wk-quote::before{content:'“';position:absolute;left:9px;top:4px;font-family:'Playfair Display',Georgia,serif;font-size:1.5rem;line-height:1;color:var(--walk-accent);opacity:.7}

.wk-since{background:#fff;border:1px solid var(--walk-border);border-left:3px solid var(--walk-accent);border-radius:4px;padding:9px 12px 10px;margin-bottom:9px;font-size:.85rem;line-height:1.55;color:var(--walk-ink)}
.wk-since-k{display:inline-block;font-family:'IBM Plex Mono',monospace;font-size:.6rem;letter-spacing:.07em;text-transform:uppercase;color:#fff;background:var(--walk-accent);padding:2px 7px;border-radius:3px;font-weight:600;margin-right:6px;vertical-align:1px}
.wk-therefore{color:var(--walk-accent);font-weight:700}

.wk-typecard{background:#fff;border:1px solid var(--walk-border);border-radius:4px;padding:12px 14px}
.wk-cue{font-style:italic;color:var(--walk-accent);font-size:.83rem;margin:8px 0 10px}
.wk-typecard p{margin:0 0 6px}

.wk-plain{background:#fff;border-left:3px solid var(--walk-accent);padding:11px 14px;font-size:.88rem;line-height:1.6;color:var(--walk-ink);border-radius:0 3px 3px 0}
.wk-why{background:var(--walk-green-bg);border-left:3px solid var(--walk-green);padding:11px 14px;margin-bottom:10px;font-size:.86rem;line-height:1.55;color:var(--walk-ink);border-radius:0 3px 3px 0}
.wk-why b{color:var(--walk-green)}
.wk-trap{background:var(--walk-red-bg);border-left:3px solid var(--walk-red);padding:11px 14px;font-size:.86rem;line-height:1.55;color:var(--walk-ink);border-radius:0 3px 3px 0}
.wk-trap b{display:block;color:var(--walk-red);text-transform:uppercase;font-family:'IBM Plex Mono',monospace;font-size:.66rem;letter-spacing:.06em;margin-bottom:4px}

/* --- coach nav (prev/next) --- */
.wk-nav{margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;gap:10px}
.wk-prev,.wk-next{font-family:'IBM Plex Mono',monospace;font-size:.74rem;letter-spacing:.03em;padding:8px 14px;border:1px solid var(--walk-accent);background:var(--walk-accent);color:#fff;border-radius:3px;cursor:pointer;transition:background .15s,opacity .15s}
.wk-prev{background:#fff;color:var(--walk-accent)}
.wk-next:hover{background:var(--walk-accent-d)}
.wk-prev:hover{background:var(--walk-cream)}
.wk-prev:disabled,.wk-next:disabled{opacity:.35;cursor:default}
.wk-count{font-family:'IBM Plex Mono',monospace;font-size:.72rem;color:var(--walk-muted)}
.wk-count b{color:var(--walk-accent)}

/* --- step dots (bottom bar) --- */
.wk-dots{display:flex;flex-wrap:wrap;gap:0;border-top:1px solid var(--walk-border);background:var(--walk-cream)}
.wk-dot{flex:1;min-width:120px;font-family:'IBM Plex Mono',monospace;font-size:.7rem;padding:11px 8px;border:none;border-right:1px solid var(--walk-border);background:transparent;color:var(--walk-muted);cursor:pointer;transition:background .15s,color .15s}
.wk-dot:last-child{border-right:none}
.wk-dot:hover{background:#fff;color:var(--walk-ink)}
.wk-dot.active{background:var(--walk-accent);color:#fff}

.walk-cta{display:inline-block;font-family:'IBM Plex Mono',monospace;font-size:.76rem;letter-spacing:.03em;color:var(--walk-accent);text-decoration:none;border-bottom:1px solid var(--walk-accent);padding-bottom:1px}
.walk-cta:hover{color:var(--walk-accent-d)}