/* ===== AI Academy (CARTRIDGE design system, tokens in /theme.css) =====
   Everything unique to the ultraviolet cartridge: track colours, manual callouts, prompt screens, chat bubbles,
   the interactive challenge widgets (forge / sort / spot / roi / branch), the Safe-or-Risky cards and the console
   instruments (Prompt Forge, ROI calculator, Rig Builder, Cost Showdown, VRAM calculator, prompt library).
   Rule of thumb used throughout: what you KEY IN is a sunken well in the hardware colour, what the machine READS OUT is a
   dark phosphor LCD (same in both themes). */

/* ---------- track colours (one cartridge-palette colour per track; the card label bands themselves live in game.css) ---------- */
:root { --t-foundations: var(--k-ai); --t-it: var(--k-sky); --t-business: var(--k-leaf); --t-automation: var(--k-it); --t-governance: var(--k-heart); --t-local: var(--k-coin); }
[data-track="foundations"] { --tc: var(--t-foundations); } [data-track="it"] { --tc: var(--t-it); } [data-track="business"] { --tc: var(--t-business); }
[data-track="automation"] { --tc: var(--t-automation); } [data-track="governance"] { --tc: var(--t-governance); } [data-track="local"] { --tc: var(--t-local); }
body[data-focus="foundations"] .map-head { --tc: var(--t-foundations); } body[data-focus="it"] .map-head { --tc: var(--t-it); }
body[data-focus="business"] .map-head { --tc: var(--t-business); } body[data-focus="automation"] .map-head { --tc: var(--t-automation); }
body[data-focus="governance"] .map-head { --tc: var(--t-governance); } body[data-focus="local"] .map-head { --tc: var(--t-local); }
/* sidebar track meter: a little colour-coded key cap in front of the track name */
.side-track[data-track] .side-track-head span:first-child::before { content: ""; display: inline-block; width: 11px; height: 11px; margin-right: 7px; vertical-align: -1px; background: var(--tc); border: 2px solid var(--k-line); border-radius: 3px; }

/* ---------- manual callouts: AI-only kinds pick the bar / label-tab colour of the box defined in style.css ---------- */
.callout.biz { --co: var(--k-leaf); }
.callout.itpro { --co: var(--k-ai); }
.callout.security { --co: var(--k-heart); }
.callout.example { --co: var(--k-sky); }
.callout.legal { --co: var(--k-it); }
.callout.career { --co: var(--k-coin); }

/* ---------- prompt screens: every prompt is shown on a CRT ---------- */
.prompt-card { margin: 20px 0; background: var(--k-screen); border: var(--k-border); border-radius: var(--k-r-sm); box-shadow: var(--k-drop-sm); overflow: hidden; }
.prompt-card figcaption { display: flex; justify-content: space-between; align-items: center; gap: 10px; min-height: 44px; padding: 4px 6px 4px 12px; background: var(--k-inset); color: var(--k-text); border-bottom: var(--k-border);
  font: 400 1.2rem/1.15 var(--k-display); letter-spacing: .04em; }
.prompt-card figcaption > span { min-width: 0; overflow-wrap: anywhere; }
.prompt-card figcaption .btn { flex: none; }
.prompt-pre { margin: 0; padding: 13px 16px 14px; white-space: pre-wrap; word-break: break-word; overflow-wrap: anywhere; font: 400 .86rem/1.6 var(--k-mono); color: var(--k-phos);
  background: var(--k-scan), var(--k-screen); border: var(--k-border); border-radius: var(--k-r-sm); }
.prompt-pre code { font: inherit; color: inherit; background: none; border: 0; padding: 0; }
.prompt-card .prompt-pre, .cmp .prompt-pre { border: 0; border-radius: 0; }
.solution .prompt-pre, .pg-out .prompt-pre { margin: 8px 0; }

/* weak vs strong: two labelled screens side by side */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 20px 0 8px; }
.cmp { margin: 0; min-width: 0; display: flex; flex-direction: column; background: var(--k-screen); border: var(--k-border); border-radius: var(--k-r-sm); box-shadow: var(--k-drop-sm); overflow: hidden; }
.cmp figcaption { padding: 7px 12px 8px; font: 400 1.25rem/1.15 var(--k-display); letter-spacing: .05em; text-transform: uppercase; color: var(--k-on-accent); border-bottom: var(--k-border); }
.cmp.bad figcaption { background: var(--k-heart); } .cmp.good figcaption { background: var(--k-leaf); }
.cmp .prompt-pre { flex: 1; }
.cmp-why { margin-top: 6px; }

/* example conversations: chunky speech bubbles */
.chat { margin: 20px 0; padding: 14px 16px 16px; }
.chat figcaption { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 12px; padding-bottom: 10px; border-bottom: 2px dashed var(--k-hair); font: 400 1.3rem/1.15 var(--k-display); letter-spacing: .04em; }
.msg { display: flex; gap: 10px; margin: 12px 0; align-items: flex-start; }
.msg.me { flex-direction: row-reverse; }
.msg .who { flex: none; width: 38px; height: 38px; display: grid; place-items: center; font-size: 1.25rem; line-height: 1; background: var(--k-cream); border: 2px solid var(--k-line); border-radius: var(--k-r-sm); }
.msg .bubble { min-width: 0; max-width: 80%; padding: 9px 13px 10px; font-size: .95rem; line-height: 1.5; overflow-wrap: anywhere; border: var(--k-border); border-radius: var(--k-r); box-shadow: var(--k-drop-sm); }
.msg.me .bubble { background: var(--k-brand); color: var(--k-on-accent); border-top-right-radius: 3px; }
.msg.me .bubble a { color: inherit; }
.msg.me .bubble code { background: var(--k-cream); color: var(--k-black); }
.msg.ai .bubble { background: var(--k-inset); color: var(--k-text); border-top-left-radius: 3px; }
.chat-note { margin: 10px 0 0; }

/* ---------- interactive challenges (shell) ---------- */
.ix-ex .ex-head { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.ix-ex .ex-head h3 { margin: 0; flex: 1 1 auto; }
.kind-badge { font: 400 1.05rem/1.2 var(--k-display); letter-spacing: .04em; padding: 3px 10px 4px; background: var(--k-brand); color: var(--k-on-accent); border: 2px solid var(--k-line); border-radius: 999px; white-space: nowrap; }
.ix-box { margin: 12px 0; }
.ix-ex .cb-tools { border-top: 0; padding: 4px 0; background: transparent; }
.ix-fb { margin-top: 8px; }
.ans-list { padding-left: 1.3em; margin: 8px 0; }
.ans-list li { margin: 5px 0; }

/* ---------- Prompt Forge ---------- */
/* the brief: a job ticket clipped to the workbench */
.forge-goal { position: relative; margin-bottom: 12px; padding: 11px 14px 12px 20px; background: var(--k-warn-bg); border: var(--k-border); border-radius: var(--k-r-sm); line-height: 1.5; }
.forge-goal::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 8px; background: var(--k-coin); border-right: var(--k-border); border-radius: calc(var(--k-r-sm) - 2px) 0 0 calc(var(--k-r-sm) - 2px); }
.forge-goal > strong:first-child { font: 400 1.2rem/1 var(--k-display); letter-spacing: .06em; text-transform: uppercase; margin-right: 2px; }
.forge-goal > .small { margin-top: 5px; }
.forge-label { display: block; }
.forge-label > .small { display: block; margin-bottom: 4px; font: 400 1.1rem/1.2 var(--k-display); letter-spacing: .08em; text-transform: uppercase; color: var(--k-muted); }
/* the prompt you write is typed onto a screen */
.forge-input { display: block; width: 100%; min-height: 150px; padding: 12px 14px; resize: vertical; font: 400 .92rem/1.6 var(--k-mono); color: var(--k-phos); caret-color: var(--k-phos-hot);
  background: var(--k-scan), var(--k-screen); border: var(--k-border); border-radius: var(--k-r-sm); }
.forge-input::placeholder { color: var(--k-phos-dim); opacity: 1; }
.forge-input:focus { outline: 3px solid var(--k-coin); outline-offset: 2px; }
[data-theme="light"] .forge-input:focus { outline-color: var(--k-link); }
/* live meter: a segmented LCD bar that goes red, amber, green */
.forge-meter { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px; margin: 10px 0; }
.fm-bar { flex: 1 1 150px; height: 20px; padding: 3px; background: var(--k-screen); border: var(--k-border); border-radius: var(--k-r-xs); overflow: hidden; }
.fm-bar > span { display: block; height: 100%; width: 0; border-radius: 1px; background: repeating-linear-gradient(90deg, var(--k-heart) 0 6px, transparent 6px 8px); transition: width .25s; }
.fm-bar > span.mid { background: repeating-linear-gradient(90deg, var(--k-coin) 0 6px, transparent 6px 8px); }
.fm-bar > span.ok { background: repeating-linear-gradient(90deg, var(--k-phos-hot) 0 6px, transparent 6px 8px); }
.forge-meter .fm-live { font: 400 1.2rem/1.2 var(--k-display); letter-spacing: .04em; color: var(--k-text); }
/* score report: LCD score + ingredient checklist */
.forge-report { margin-top: 12px; display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: 14px 16px; align-items: start; }
.forge-score { position: relative; display: flex; flex-direction: column; align-items: center; padding: 16px 10px 12px; text-align: center; font-family: var(--k-display); color: var(--k-phos);
  background: var(--k-screen); border: var(--k-border); border-radius: var(--k-r-sm); box-shadow: var(--k-drop-sm); }
.forge-score::after { content: ""; position: absolute; inset: 0; border-radius: inherit; background: var(--k-scan); pointer-events: none; }
.forge-score::before { content: ""; position: absolute; top: 8px; right: 8px; width: 10px; height: 10px; border-radius: 50%; background: var(--k-heart); box-shadow: 0 0 8px var(--k-heart); }
.forge-score.ok::before { background: var(--k-phos-hot); box-shadow: 0 0 8px var(--k-phos-hot); }
.fs-num { font-size: 4.4rem; font-weight: 400; line-height: .85; color: var(--k-heart); }
.forge-score.ok .fs-num { color: var(--k-phos-hot); }
.fs-of { font-size: 1.4rem; line-height: 1.1; color: var(--k-phos-dim); }
.fs-tgt { margin-top: 8px; padding-top: 7px; width: 100%; border-top: 1px dashed var(--k-screen-line); font: 500 .8rem/1.3 var(--k-body); color: var(--k-phos-dim); }
.forge-crit, .forge-must { list-style: none; margin: 0; padding: 0; min-width: 0; }
.forge-crit li, .forge-must li { display: grid; grid-template-columns: 28px minmax(0, 1fr); gap: 3px 10px; align-items: start; padding: 7px 0; border-bottom: 2px dashed var(--k-hair); }
.forge-crit li:last-child, .forge-must li:last-child { border-bottom: 0; }
.fc-name { font-weight: 700; }
.fc-name small { margin-left: 4px; font: 400 1.1rem/1 var(--k-display); letter-spacing: .03em; color: var(--k-muted); }
.forge-crit .fc-tip { grid-column: 2; color: var(--k-muted); }
/* check marks are little stickers */
.fc-mark { width: 26px; height: 26px; display: grid; place-items: center; font-weight: 800; font-size: .95rem; line-height: 1; color: var(--k-on-accent); background: var(--k-inset); border: 2px solid var(--k-line); border-radius: var(--k-r-xs); }
.forge-crit .lv2 .fc-mark, .forge-must .ok .fc-mark { background: var(--k-leaf); }
.forge-crit .lv1 .fc-mark { background: var(--k-coin); }
.forge-crit .lv0 .fc-mark, .forge-must .bad .fc-mark { background: var(--k-heart); }
.forge-must { grid-column: 2; padding: 4px 12px 2px; border: 2px dashed var(--k-hair); border-radius: var(--k-r-sm); }
.forge-must .fm-head { display: block; padding: 6px 0 4px; border: 0; font: 400 1.1rem/1.2 var(--k-display); letter-spacing: .08em; text-transform: uppercase; color: var(--k-muted); }
.forge-report > p { grid-column: 1 / -1; margin: 0; }

/* ---------- sort: one slip per item, bucket keys underneath ---------- */
.sort-items { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.sort-item { padding: 10px 12px 12px; background: var(--k-inset); border: var(--k-border); border-radius: var(--k-r-sm); }
.sort-item.right { border-color: var(--k-ok); background: var(--k-ok-bg); box-shadow: inset 6px 0 0 var(--k-ok); }
.sort-item.wrong { border-color: var(--k-bad); background: var(--k-bad-bg); box-shadow: inset 6px 0 0 var(--k-bad); }
.si-buckets { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 9px; }
.si-b { position: relative; display: inline-flex; align-items: center; gap: 7px; min-height: 44px; padding: 4px 13px 5px; cursor: pointer; font: 400 1.2rem/1.1 var(--k-display); letter-spacing: .03em; color: var(--k-text);
  background: var(--k-panel); border: var(--k-border); border-radius: var(--k-r-sm); box-shadow: var(--k-drop-sm); transition: transform .08s, box-shadow .08s, background .08s; }
.si-b input { margin: 0; accent-color: var(--k-brand); }
.si-b:hover { background: var(--k-chrome); }
.si-b:active { transform: translate(2px, 2px); box-shadow: none; }
.si-b:has(input:checked) { background: var(--k-brand); color: var(--k-on-accent); transform: translate(2px, 2px); box-shadow: none; }
.si-b:has(input:focus-visible) { outline: 3px solid var(--k-coin); outline-offset: 2px; }
[data-theme="light"] .si-b:has(input:focus-visible) { outline-color: var(--k-link); }
/* where :has() works the key itself shows the state, so the native radio dot is swapped for a lamp */
@supports selector(:has(*)) {
  .si-b input { appearance: none; -webkit-appearance: none; width: 12px; height: 12px; border: 2px solid var(--k-line); border-radius: 50%; background: var(--k-inset); outline: none; }
  .si-b input:checked { background: var(--k-cream); border-color: var(--k-black); }
}
.si-why { margin-top: 8px; padding-top: 7px; border-top: 2px dashed var(--k-hair); }

/* ---------- spot: highlight the bad sentences with a marker pen ---------- */
.spot-source { position: relative; margin-bottom: 12px; padding: 9px 13px 10px 21px; font-size: .93rem; background: var(--k-info-bg); border: var(--k-border); border-radius: var(--k-r-sm); }
.spot-source::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 8px; background: var(--k-sky); border-right: var(--k-border); border-radius: calc(var(--k-r-sm) - 2px) 0 0 calc(var(--k-r-sm) - 2px); }
.spot-answer { padding: 11px 13px 12px; background: var(--k-inset); border: var(--k-border); border-radius: var(--k-r-sm); }
.spot-source > .small:first-child, .spot-answer > .small:first-child { margin-bottom: 3px; font-weight: 700; }
.spot-sents { line-height: 2.25; margin: 6px 0 0; }
.spot-s { display: inline; font: inherit; font-size: .96rem; text-align: left; color: var(--k-text); background: transparent; border: 2px dashed var(--k-hair); border-radius: 6px; padding: 3px 6px; cursor: pointer;
  -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.spot-s:hover { border-color: var(--k-line); background: var(--k-panel); }
.spot-s[aria-pressed="true"] { background: var(--k-coin); color: var(--k-on-accent); border: 2px solid var(--k-line); }
.spot-s.right { background: var(--k-leaf); color: var(--k-on-accent); border: 2px solid var(--k-line); }
.spot-s.wrong { background: var(--k-heart); color: var(--k-on-accent); border: 2px solid var(--k-line); text-decoration: underline wavy var(--k-on-accent); text-underline-offset: 3px; }
.spot-s[aria-pressed="true"] code, .spot-s.right code, .spot-s.wrong code { background: var(--k-cream); color: var(--k-black); }
.spot-why { margin-top: 10px; }

/* ---------- instrument parts shared by the ROI widget and all calculators ---------- */
/* key-in field: label on top, sunken well with unit caps */
.roi-field { position: relative; display: flex; flex-direction: column; gap: 5px; min-width: 0; font-size: .92rem; font-weight: 600; line-height: 1.35; }
.roi-inp { display: flex; align-items: stretch; width: 100%; max-width: 280px; min-height: 46px; background: var(--k-inset); border: var(--k-border); border-radius: var(--k-r-sm); box-shadow: inset 0 3px 0 var(--k-hair); overflow: hidden; }
.roi-inp input { flex: 1 1 auto; width: 100%; min-width: 0; margin: 0; padding: 3px 12px 0; font: 700 1.05rem var(--k-mono); color: var(--k-text); background: transparent; border: 0; border-radius: 0; outline: none; }
.roi-inp b { flex: none; display: grid; place-items: center; min-width: 40px; padding: 0 9px; font: 400 1.2rem/1 var(--k-display); letter-spacing: .03em; color: var(--k-muted); background: var(--k-panel); border-left: var(--k-border); }
.roi-inp b:first-child { border-left: 0; border-right: var(--k-border); }
.roi-inp:focus-within { outline: 3px solid var(--k-coin); outline-offset: 2px; }
[data-theme="light"] .roi-inp:focus-within { outline-color: var(--k-link); }
.roi-field.ok .roi-inp { border-color: var(--k-ok); background: var(--k-ok-bg); box-shadow: none; }
.roi-field.bad .roi-inp { border-color: var(--k-bad); background: var(--k-bad-bg); box-shadow: none; }
.roi-mark { position: absolute; right: 0; top: 0; font-weight: 800; }
.roi-mark:not(:empty) { width: 24px; height: 24px; display: grid; place-items: center; font-size: .9rem; line-height: 1; color: var(--k-on-accent); border: 2px solid var(--k-line); border-radius: var(--k-r-xs); }
.roi-field.ok .roi-mark { background: var(--k-leaf); } .roi-field.bad .roi-mark { background: var(--k-heart); }
/* chunky selector */
.pg-select, .lt-sel select { -webkit-appearance: none; appearance: none; display: block; width: 100%; max-width: 100%; min-height: 46px; padding: 8px 44px 8px 12px; cursor: pointer; text-overflow: ellipsis;
  font: 600 .95rem/1.3 var(--k-body); color: var(--k-text); background-color: var(--k-panel); border: var(--k-border); border-radius: var(--k-r-sm); box-shadow: var(--k-drop-sm);
  background-image: linear-gradient(45deg, transparent 50%, var(--k-text) 50%), linear-gradient(135deg, var(--k-text) 50%, transparent 50%), linear-gradient(var(--k-line), var(--k-line));
  background-position: right 19px center, right 13px center, right 38px top; background-size: 6px 6px, 6px 6px, 2px 100%; background-repeat: no-repeat; }
.pg-select:hover, .lt-sel select:hover { background-color: var(--k-inset); }
.pg-select option, .lt-sel select option { background: var(--k-panel); color: var(--k-text); font-weight: 500; }
/* dip switch */
.lt-check { display: flex; gap: 12px; align-items: center; min-height: 46px; font-weight: 600; font-size: .92rem; }
.lt-check input[type="checkbox"] { -webkit-appearance: none; appearance: none; position: relative; flex: none; width: 54px; height: 30px; margin: 0; cursor: pointer; background: var(--k-screen); border: var(--k-border); border-radius: 7px; transition: background .12s; }
.lt-check input[type="checkbox"]::before { content: ""; position: absolute; left: 2px; top: 2px; width: 22px; height: 22px; background: var(--k-cream); border: 2px solid var(--k-black); border-radius: 4px; transition: transform .12s; }
.lt-check input[type="checkbox"]::after { content: ""; position: absolute; right: 8px; top: 9px; width: 8px; height: 8px; border-radius: 50%; background: var(--k-phos-dim); }
.lt-check input[type="checkbox"]:checked { background: var(--k-leaf); }
.lt-check input[type="checkbox"]:checked::before { transform: translateX(24px); }
.lt-check input[type="checkbox"]:checked::after { right: auto; left: 8px; background: var(--k-black); }
/* LCD read-out: one screen, one cell per figure */
.roi-dl { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 2px; margin: 0; background: var(--k-screen-line); border: var(--k-border); border-radius: var(--k-r-sm); overflow: hidden; }
.roi-dl::after { content: ""; position: absolute; inset: 0; background: var(--k-scan); pointer-events: none; }
.roi-dl div { min-width: 0; display: flex; flex-direction: column; justify-content: space-between; gap: 6px; padding: 10px 12px 9px; background: var(--k-screen); }
.roi-dl dt { font: 500 .78rem/1.3 var(--k-body); letter-spacing: .02em; color: var(--k-phos-dim); }
.roi-dl dd { margin: 0; font: 400 1.85rem/1 var(--k-display); letter-spacing: .02em; color: var(--k-phos); overflow-wrap: anywhere; }
.roi-dl dd.st-ok { color: var(--k-phos-hot); } .roi-dl dd.st-bad { color: var(--k-heart); }
.roi-dl > div:last-child:nth-child(odd) { grid-column: 1 / -1; }
/* verdict lamp */
.roi-verdict { margin: 14px 0 0; padding: 9px 13px 10px; line-height: 1.4; border: 2px solid currentColor; border-radius: var(--k-r-sm); }
.roi-verdict.st-ok { color: var(--k-ok); background: var(--k-ok-bg); } .roi-verdict.st-bad { color: var(--k-bad); background: var(--k-bad-bg); }

/* ---------- ROI challenge inside lessons: fact sheet on the left, key-in on the right ---------- */
.roi { display: grid; grid-template-columns: minmax(220px, 1fr) minmax(240px, 1.2fr); gap: 16px; align-items: start; }
.roi-facts { min-width: 0; padding: 4px 12px 8px; background: var(--k-inset); border: var(--k-border); border-radius: var(--k-r-sm); }
.roi-facts table { font-size: .9rem; margin: 0; } .roi-facts th { width: 55%; background: transparent; color: var(--k-muted); }
.roi-facts th, .pc-facts th { font: 600 .9rem/1.4 var(--k-body); letter-spacing: 0; text-transform: none; text-align: left; }
.roi-facts th, .roi-facts td { padding-left: 0; padding-right: 8px; border-bottom: 2px dashed var(--k-hair); }
.roi-facts td { font-family: var(--k-mono); font-weight: 700; font-size: .88rem; }
.roi-facts tr:last-child th, .roi-facts tr:last-child td { border-bottom: 0; }
.roi-facts > p { margin: 8px 0 0; }
.roi-ask { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.roi-ask .roi-field > span:first-child { padding-right: 30px; }
.roi-decide { min-width: 0; margin: 4px 0 0; padding: 6px 10px 10px; display: flex; flex-direction: column; gap: 4px; border: var(--k-border); border-radius: var(--k-r-sm); }
.roi-decide legend { padding: 0 6px; font-weight: 700; }
.roi > p { grid-column: 1 / -1; margin: 0; }

/* ---------- calculator pages: INPUT deck on the left, READ-OUT deck on the right ---------- */
.roi-tool { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: 22px; align-items: start; margin: 18px 0 24px; }
.roi-form, .roi-results, .forge-pg, .lib-sec,
:where(.content[data-route="forge"], .content[data-route="roi"], .content[data-route="rig"], .content[data-route="cost"], .content[data-route="vram"]) > section.card {
  --pad: 18px; min-width: 0; padding: var(--pad); color: var(--k-text); background: var(--k-panel); border: var(--k-border); border-radius: var(--k-r); box-shadow: var(--k-drop-md); }
:where(.content[data-route="forge"], .content[data-route="roi"], .content[data-route="rig"], .content[data-route="cost"], .content[data-route="vram"]) > section.card { margin: 24px 0; }
/* panel header strips (same recipe as the Hub's .panel h3) */
.roi-form::before, .roi-results > h2, .forge-pg > .pg-pick > .small, .lib-sec > h2,
:where(.content[data-route="forge"], .content[data-route="roi"], .content[data-route="rig"], .content[data-route="cost"], .content[data-route="vram"]) > section.card > h2 {
  display: block; margin: calc(var(--pad) * -1) calc(var(--pad) * -1) 16px; padding: 10px var(--pad) 11px; font: 400 1.5rem/1.1 var(--k-display); letter-spacing: .05em; text-transform: uppercase; color: var(--k-text);
  background: var(--k-inset); border-bottom: var(--k-border); border-radius: calc(var(--k-r) - 2px) calc(var(--k-r) - 2px) 0 0; }
.roi-form { display: flex; flex-direction: column; gap: 14px; }
.roi-form::before { content: "▮ Input"; margin-bottom: 2px; }
.roi-form .roi-inp { max-width: none; }
.roi-results > h2 ~ h2, .roi-results > h3 { margin: 20px calc(var(--pad) * -1) 16px; padding: 9px var(--pad) 10px; font: 400 1.4rem/1.1 var(--k-display); letter-spacing: .05em; text-transform: uppercase;
  background: var(--k-inset); border-top: var(--k-border); border-bottom: var(--k-border); border-radius: 0; }
.roi-results > p { margin: 10px 0 0; }
.roi-results > .roi-verdict { margin-top: 14px; }
:where(.content[data-route="forge"], .content[data-route="roi"], .content[data-route="rig"], .content[data-route="cost"], .content[data-route="vram"]) > section.card > :last-child { margin-bottom: 0; }
@media (min-width: 761px) { .content[data-route="forge"] > section.card td:first-child { white-space: nowrap; } }
/* practice case */
.pc-body > p:first-child { margin-top: 0; }
/* app-shell.css turns every .content table into a scroll block; these two are short fact sheets that must fill their box */
html.app-academy .content .pc-facts, html.app-academy .content .roi-facts table { display: table; }
.pc-facts { display: table; width: 100%; max-width: 480px; margin: 10px 0 16px; font-size: .9rem; border: var(--k-border); border-radius: var(--k-r-sm); border-collapse: separate; border-spacing: 0; overflow: hidden; }
.pc-facts th { width: 62%; background: var(--k-inset); color: var(--k-text); }
.pc-facts td { font-family: var(--k-mono); font-weight: 700; }
.pc-facts tr:last-child th, .pc-facts tr:last-child td { border-bottom: 0; }
.pc-form { display: flex; flex-wrap: wrap; gap: 14px; align-items: flex-end; }
.pc-form .roi-field { flex: 1 1 200px; max-width: 280px; }
.pc-actions { display: flex; gap: 10px; flex-wrap: wrap; flex: 1 1 100%; }
.pc-fb > p { margin: 14px 0 0; padding: 10px 13px; border: 2px solid currentColor; border-radius: var(--k-r-sm); }
.pc-fb > p.st-ok { background: var(--k-ok-bg); } .pc-fb > p.st-bad { background: var(--k-bad-bg); }
/* wide + tall enough: keep short read-outs in view while you key numbers in */
@media (min-width: 761px) and (min-height: 720px) { .roi-results:not(.rig-out):not(.vram-out) { position: sticky; top: calc(var(--top-h, 60px) + 16px); } }

/* ---------- branching scenario: a little text adventure ---------- */
.br-trail { list-style: none; margin: 0 0 14px 5px; padding: 2px 0 2px 14px; display: flex; flex-direction: column; gap: 9px; border-left: 2px dashed var(--k-hair); }
.br-trail:empty { display: none; }
.br-trail li { position: relative; padding: 0 0 0 8px; font-size: .9rem; line-height: 1.45; }
.br-trail li::before { content: ""; position: absolute; left: -21px; top: .32em; width: 12px; height: 12px; background: var(--k-brand); border: 2px solid var(--k-line); border-radius: 50%; }
.br-fb { color: var(--k-muted); margin-top: 2px; }
.br-node { padding: 14px 16px 16px; background: var(--k-inset); border: var(--k-border); border-radius: var(--k-r); box-shadow: var(--k-drop-md); }
.br-text { margin: 0 0 12px; font-size: 1.02rem; line-height: 1.55; }
.br-choices { display: flex; flex-direction: column; gap: 10px; }
.br-choice { display: flex; align-items: flex-start; justify-content: flex-start; gap: 9px; width: 100%; height: auto; min-height: 46px; padding: 10px 14px; text-align: left; white-space: normal; cursor: pointer;
  font: 600 .95rem/1.4 var(--k-body); letter-spacing: 0; text-transform: none; color: var(--k-text); background: var(--k-panel); border: var(--k-border); border-radius: var(--k-r-sm); box-shadow: var(--k-drop-sm); transition: transform .08s, box-shadow .08s, background .08s; }
.br-choice::before { content: "▶"; flex: none; font-size: .7rem; line-height: 2; color: var(--k-brand-text); }
.br-choice:hover { background: var(--k-chrome); filter: none; }
.br-choice:active { transform: translate(2px, 2px); box-shadow: none; }
.br-end { padding: 2px 0 0; }
.br-end-k { display: inline-block; margin-bottom: 4px; padding: 4px 12px 5px; font: 400 1.35rem/1.1 var(--k-display); letter-spacing: .05em; text-transform: uppercase; color: var(--k-on-accent); border: var(--k-border); border-radius: var(--k-r-sm); }
.br-end.win .br-end-k { background: var(--k-leaf); } .br-end.lose .br-end-k { background: var(--k-heart); }

/* ---------- Safe-or-Risky arcade: the card and the two big keys ---------- */
.sr-card { position: relative; min-height: 130px; display: flex; align-items: center; justify-content: center; text-align: center; margin: 12px 0 16px; padding: 26px 18px 20px; font-size: 1.15rem; line-height: 1.5; color: var(--k-text);
  background: var(--k-dots), var(--k-inset); border: var(--k-border); border-radius: var(--k-r); box-shadow: var(--k-drop-md); overflow: hidden; }
.sr-card::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 7px; background: var(--k-stripes); border-bottom: var(--k-border); }
.sr-card p { margin: 0; max-width: 60ch; overflow-wrap: anywhere; }
.sr-buttons { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.sr-buttons .btn { justify-content: center; min-height: 64px; padding: 10px 14px; font: 400 1.7rem/1 var(--k-display); letter-spacing: .04em; color: var(--k-on-accent); border: var(--k-border); border-radius: var(--k-r-sm); box-shadow: var(--k-drop-md); transition: transform .08s, box-shadow .08s; }
.sr-buttons .btn:hover { filter: none; }
.sr-buttons .btn:active { transform: translate(4px, 4px); box-shadow: none; }
.sr-buttons .sr-safe { background: var(--k-leaf); border-color: var(--k-line); } .sr-buttons .sr-risky { background: var(--k-heart); border-color: var(--k-line); }
.arcade-missed { text-align: left; margin: 12px 0; padding: 0 12px; border: 2px dashed var(--k-hair); border-radius: var(--k-r-sm); }
.arcade-missed summary { min-height: 44px; display: flex; align-items: center; cursor: pointer; font: 400 1.25rem var(--k-display); letter-spacing: .02em; color: var(--k-link); }

/* ---------- library, glossary bar, side quests, forge workbench ---------- */
.lib-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 460px), 1fr)); gap: 24px 22px; align-items: start; }
.lib-sec > :last-child { margin-bottom: 0; }
.lib-sec .prompt-card:first-of-type { margin-top: 12px; }
.lib-tip { margin-top: -10px; }
.glossary-bar { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-bottom: 14px; }
.glossary-bar .glossary-filter { flex: 1 1 260px; margin: 0; }
.glossary-bar .toggle { min-height: 44px; }
.side-quests { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr)); gap: 18px; }
.side-quests .side-quest { margin: 0; display: flex; flex-direction: column; }
.side-quests .side-quest > .btn { margin-top: auto; align-self: flex-start; }
.side-quests .world-head h2 { font-size: 1.3rem; }
.forge-pg { margin: 18px 0 24px; }
.forge-pg .pg-pick { display: flex; flex-direction: column; gap: 0; margin-bottom: 12px; }
.forge-pg .cb-tools { border-top: 0; background: transparent; padding: 4px 0; }
.pg-out > p:first-child { margin: 12px 0 0; padding: 9px 13px 10px; border: 2px solid currentColor; border-radius: var(--k-r-sm); }
.pg-out > p.st-ok:first-child { background: var(--k-ok-bg); } .pg-out > p.st-bad:first-child { background: var(--k-bad-bg); }
.pg-out > p.small:first-child { padding: 0; border: 0; }

/* ---------- Local AI workshop: Rig Builder, Cost Showdown, VRAM calculator ---------- */
/* tool switcher: a row of mode keys, the one you are on is lit */
.lt-nav { display: flex; flex-wrap: wrap; gap: 8px; margin: 6px 0 16px; }
.lt-nav .btn { min-height: 44px; padding: 4px 13px 5px; font: 400 1.2rem/1.1 var(--k-display); letter-spacing: .03em; color: var(--k-text); background: var(--k-panel); border: var(--k-border); border-radius: var(--k-r-sm); box-shadow: var(--k-drop-sm); }
.lt-nav .btn:hover { background: var(--k-inset); filter: none; }
.lt-nav .btn:active { transform: translate(2px, 2px); box-shadow: none; }
.content[data-route="rig"] .lt-nav a[href="#/rig"], .content[data-route="vram"] .lt-nav a[href="#/vram"], .content[data-route="cost"] .lt-nav a[href="#/cost"] { background: var(--k-brand); color: var(--k-on-accent); transform: translate(2px, 2px); box-shadow: none; }
/* hardware picks: spec cards */
.rig-picks { display: grid; gap: 16px; }
.rig-pick { position: relative; min-width: 0; padding: 12px 14px 12px; background: var(--k-inset); border: var(--k-border); border-radius: var(--k-r-sm); box-shadow: var(--k-drop-sm); }
.rig-pick header { display: flex; flex-direction: column; align-items: flex-start; gap: 7px; }
.rig-pick h3 { margin: 0; font: 400 1.5rem/1.1 var(--k-display); letter-spacing: .02em; }
.rig-tag { padding: 3px 9px 4px; font: 400 1.05rem/1.1 var(--k-display); letter-spacing: .08em; text-transform: uppercase; color: var(--k-text); background: var(--k-panel); border: 2px solid var(--k-line); border-radius: 999px; }
.rig-picks:not(.rig-stretch) .rig-pick:first-child { box-shadow: var(--k-drop-md); }
.rig-picks:not(.rig-stretch) .rig-pick:first-child .rig-tag { background: var(--k-coin); color: var(--k-on-accent); }
.rig-stretch .rig-pick { border-style: dashed; box-shadow: none; background: transparent; }
.rig-stretch .rig-tag { background: var(--k-heart); color: var(--k-on-accent); }
.rig-price { margin: 8px 0; line-height: 1.4; }
.rig-price strong { display: block; width: fit-content; margin: 0 0 6px; padding: 3px 10px 5px; font: 400 1.6rem/1 var(--k-display); letter-spacing: .03em; color: var(--k-coin); background: var(--k-screen); border: 2px solid var(--k-line); border-radius: var(--k-r-xs); }
.rig-facts { list-style: none; margin: 8px 0; padding: 0; }
.rig-facts li { position: relative; padding: 3px 0 3px 18px; }
.rig-facts li::before { content: ""; position: absolute; left: 2px; top: .75em; width: 7px; height: 7px; background: var(--k-brand); border: 1px solid var(--k-line); border-radius: 2px; }
.rig-pick > p { margin: 8px 0 0; }
.rig-src a { word-break: break-word; }
.rig-tips { margin: 18px 0 0; padding: 10px 14px 10px 30px; border: 2px dashed var(--k-hair); border-radius: var(--k-r-sm); }
.rig-tips li { margin: 5px 0; }
/* TCO chart: two bars on an LCD */
.cost-bars { position: relative; display: grid; gap: 10px; margin: 14px 0; padding: 12px 14px; background: var(--k-screen); color: var(--k-phos); border: var(--k-border); border-radius: var(--k-r-sm); }
.cost-bars::after { content: ""; position: absolute; inset: 0; border-radius: inherit; background: var(--k-scan); pointer-events: none; }
.cost-bars div { display: grid; grid-template-columns: 112px minmax(0, 1fr) auto; gap: 10px; align-items: center; font-size: .86rem; font-weight: 600; }
.cost-bars b { display: block; height: 18px; min-width: 4px; border-radius: 1px; background: repeating-linear-gradient(90deg, var(--k-sky) 0 6px, transparent 6px 8px); }
.cost-bars b.loc { background: repeating-linear-gradient(90deg, var(--k-coin) 0 6px, transparent 6px 8px); }
.cost-bars em { font: 400 1.3rem/1 var(--k-display); font-style: normal; letter-spacing: .03em; }
.cost-dl dd { font-size: 1.6rem; }
.vram-fits th, .vram-fits td { overflow-wrap: normal; word-break: normal; }
.vram-fits td:nth-child(2), .vram-fits td:nth-child(3), .vram-fits td:nth-child(4) { white-space: nowrap; }
.vram-fits th { font-size: 1.05rem; line-height: 1.15; vertical-align: bottom; }
.vram-fits th, .vram-fits td { padding-left: 9px; padding-right: 9px; }
.roi-tool:has(.vram-out) { grid-template-columns: minmax(0, .8fr) minmax(0, 1.35fr); }
.vram-fits td:nth-child(2), .vram-fits td:nth-child(3), .vram-fits td:nth-child(4) { font-family: var(--k-mono); font-size: .86rem; }
.roi-results .table-wrap { margin: 0 0 4px; }

/* ---------- narrow screens (phone, folded cover) ---------- */
@media (max-width: 760px) {
  .compare, .roi, .roi-tool, .roi-tool:has(.vram-out), .forge-report { grid-template-columns: minmax(0, 1fr); }
  .forge-must { grid-column: 1; }
  .roi-dl { grid-template-columns: 1fr 1fr; }
  .msg .bubble { max-width: 88%; }
  .sr-card { font-size: 1.02rem; padding: 24px 14px 16px; }
  .roi-form, .roi-results, .forge-pg, .lib-sec,
  :where(.content[data-route="forge"], .content[data-route="roi"], .content[data-route="rig"], .content[data-route="cost"], .content[data-route="vram"]) > section.card { --pad: 14px; }
  .roi-tool { gap: 20px; }
  .roi-inp, .pc-form .roi-field { max-width: none; }
  .forge-input, .roi-inp input, .pg-select, .lt-sel select { font-size: 16px; }
  /* the score read-out lies down as a strip above the checklist */
  .forge-score { flex-direction: row; flex-wrap: wrap; justify-content: center; align-items: baseline; gap: 2px 8px; padding: 14px 12px 10px; }
  .fs-num { font-size: 3.6rem; }
  .spot-sents { line-height: 2.45; }
  .lt-nav .btn { flex: 1 1 auto; justify-content: center; }
  .pc-actions .btn { flex: 1 1 auto; justify-content: center; min-height: 46px; }
  .prompt-pre { padding: 11px 12px 12px; }
}
@media (max-width: 720px) { .cost-bars div { grid-template-columns: 96px minmax(0, 1fr); } .cost-bars em { grid-column: 2; } }
@media (max-width: 420px) {
  .roi-dl dd { font-size: 1.55rem; }
  .cost-dl { grid-template-columns: minmax(0, 1fr); }
  .rig-price strong { font-size: 1.45rem; }
  .msg { gap: 7px; } .msg .who { width: 32px; height: 32px; font-size: 1.05rem; }
  .sr-buttons { gap: 10px; } .sr-buttons .btn { font-size: 1.45rem; padding: 10px 6px; }
}
/* paper: screens print as outlined white boxes */
@media print {
  .prompt-card, .prompt-pre, .cmp, .forge-input, .forge-score, .roi-dl, .roi-dl div, .cost-bars, .rig-price strong { background: transparent !important; color: var(--k-black) !important; box-shadow: none !important; }
  .roi-dl dt, .roi-dl dd, .fs-num, .fs-of, .fs-tgt { color: var(--k-black) !important; }
  .roi-dl::after, .forge-score::after, .cost-bars::after { display: none; }
  .lt-nav, .forge-meter { display: none; }
  .roi-results { position: static !important; }
}