/* Case study: page shell, slides, stage mode, presenter console, print.
   Read mode is a long page. Stage mode shows one slide per screen on a 1440x900 design
   grid: 1rem scales with min(viewport width / 1440, viewport height / 900). */

:root{
  --bg:#eef0e7;
  --surface:#f9faf6;
  --surface-2:#e4e9dd;
  --ink:#1e1f1e;
  --ink-2:#4b524c;
  --ink-3:#5f665f;
  --rule:#d3d9cd;
  --rule-2:#b6c0b3;
  --accent:#21694a;
  --accent-2:#23ad72;
  --accent-wash:#d6f6e5;
  --on-accent:#f3fbf6;
  --muted-mark:#a9b4a8;
  --risk:#633333;
  --risk-wash:#ffe7e5;
  --risk-mark:#633333;
  --on-risk:#ffe7e5;
  --warn:#fca93d;
  --warn-wash:#fff0d6;
  --warn-ink:#6b4a10;
  --on-warn:#1e1f1e;
  --good:#23ad72;
  --good-wash:#d9f5e7;
  --good-ink:#17583c;
  --on-good:#0e2a1d;
  --band:#0b0e0c;
  --band-2:#151b18;
  --band-ink:#eef2ec;
  --band-ink-2:#a9b4ab;
  --band-rule:#29332d;
  --band-accent:#2bd99e;
  /* Level colours: one green ramp, deeper with each level. */
  --lv0:#a9b4a8;
  --lv1:#7cc4a2;
  --lv2:#23ad72;
  --lv3:#21694a;
  --f-display:"Newsreader","Iowan Old Style","Palatino Linotype",Georgia,serif;
  --f-body:"Manrope","Avenir Next","Segoe UI",system-ui,-apple-system,sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --f-num:"Barlow Condensed","Arial Narrow","Roboto Condensed",sans-serif;
  --f-mark:"Jura","Eurostile","Futura",sans-serif;
  --gutter-l:max(16px, env(safe-area-inset-left, 0px));
  --gutter-r:max(16px, env(safe-area-inset-right, 0px));
  --ease:cubic-bezier(.2,.7,.2,1);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0f1411; --surface:#151c18; --surface-2:#1d2621; --ink:#e9ede6; --ink-2:#b6bfb7; --ink-3:#93a097;
    --rule:#28322c; --rule-2:#3a4740; --accent:#2bd99e; --accent-2:#23ad72; --accent-wash:#132a20; --on-accent:#08140e; --muted-mark:#4d5a52;
    --risk:#ffb4ab; --risk-wash:#3a2222; --risk-mark:#d9645a; --on-risk:#1c0d0c;
    --warn:#fca93d; --warn-wash:#3a2e17; --warn-ink:#ffd89a; --on-warn:#1e1f1e;
    --good:#1f9e68; --good-wash:#163126; --good-ink:#9df0cf; --on-good:#0b1f16;
    --band:#070908; --band-2:#111613; --band-rule:#232c27;
    --lv0:#4d5a52; --lv1:#2f7d5c; --lv2:#23ad72; --lv3:#2bd99e;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0f1411; --surface:#151c18; --surface-2:#1d2621; --ink:#e9ede6; --ink-2:#b6bfb7; --ink-3:#93a097;
  --rule:#28322c; --rule-2:#3a4740; --accent:#2bd99e; --accent-2:#23ad72; --accent-wash:#132a20; --on-accent:#08140e; --muted-mark:#4d5a52;
  --risk:#ffb4ab; --risk-wash:#3a2222; --risk-mark:#d9645a; --on-risk:#1c0d0c;
  --warn:#fca93d; --warn-wash:#3a2e17; --warn-ink:#ffd89a; --on-warn:#1e1f1e;
  --good:#1f9e68; --good-wash:#163126; --good-ink:#9df0cf; --on-good:#0b1f16;
  --band:#070908; --band-2:#111613; --band-rule:#232c27;
  --lv0:#4d5a52; --lv1:#2f7d5c; --lv2:#23ad72; --lv3:#2bd99e;
  color-scheme:dark;
}
:root[data-theme="light"]{color-scheme:light}

/* Dark bands re-point the ink tokens, so every component inside them adapts. */
.is-dark{
  --bg:var(--band); --surface:var(--band-2); --surface-2:#1b231f; --ink:var(--band-ink); --ink-2:var(--band-ink-2); --ink-3:var(--band-ink-2);
  --rule:var(--band-rule); --rule-2:#3a4740; --accent:var(--band-accent); --accent-wash:#132a20; --on-accent:#08140e; --muted-mark:#4d5a52;
  background:var(--band); color:var(--band-ink);
}

/* Dark bands also re-point the status washes, so chips and check rows read as dark there. */
.is-dark{--warn-wash:#3a2e17;--warn-ink:#ffd89a;--good-wash:#163126;--good-ink:#9df0cf}

/* ---------- base ---------- */
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:120px}
/* smooth only after load, so #deep-links jump straight to their target */
@media (prefers-reduced-motion: no-preference){html.smooth{scroll-behavior:smooth}}
body{margin:0;background:var(--bg);color:var(--ink);font:400 1rem/1.6 var(--f-body);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top, 0px);z-index:40;background:var(--band)}
a{color:var(--accent);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
/* focus: the bright ring fails 3:1 on the light page, so light uses the deep accent */
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
:root[data-theme="dark"] :focus-visible,.is-dark :focus-visible{outline-color:var(--accent-2)}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) :focus-visible{outline-color:var(--accent-2)}}
.topbar :focus-visible,.foot :focus-visible,body[data-cur-dark="1"] .stage-foot :focus-visible{outline-color:var(--band-accent)}
h1,h2,h3,h4{margin:0;text-wrap:balance;font-weight:500}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
figure,blockquote,dl,dd{margin:0}
button,input,select{font:inherit;color:inherit}
button{-webkit-tap-highlight-color:transparent;touch-action:manipulation}
svg{display:block}
kbd{display:inline-flex;align-items:center;justify-content:center;min-width:1.9em;padding:.2em .45em;border-radius:4px;border:1px solid var(--rule-2);border-bottom-width:2px;background:var(--surface);font:600 .82em/1.2 var(--f-mono);color:var(--ink)}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip{position:absolute;left:12px;top:-60px;z-index:100;background:var(--accent);color:var(--on-accent);padding:10px 14px;border-radius:4px;font-weight:700;text-decoration:none}
.skip:focus{top:calc(env(safe-area-inset-top, 0px) + 10px)}
.wrap{max-width:1120px;margin:0 auto;padding-left:var(--gutter-l);padding-right:var(--gutter-r)}
.deck:focus{outline:none}

/* ---------- top bar (read mode) ---------- */
.topbar{position:-webkit-sticky;position:sticky;top:env(safe-area-inset-top, 0px);z-index:30;background:var(--band);color:var(--band-ink);border-bottom:1px solid var(--band-rule)}
.topbar .wrap{position:relative;display:flex;align-items:center;gap:12px;min-height:58px;max-width:1320px}
.brand{display:flex;align-items:center;gap:14px;min-height:44px;text-decoration:none;color:var(--band-ink);flex:none}
.wordmark{font:300 17px/1 var(--f-mark);letter-spacing:.32em;text-transform:uppercase;white-space:nowrap}
.brand-sub{font:500 10.5px/1 var(--f-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--band-ink-2);padding-left:14px;border-left:1px solid var(--band-rule);white-space:nowrap}
.nav{flex:1;min-width:0;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.nav::-webkit-scrollbar{display:none}
.nav ul{display:flex;gap:2px;white-space:nowrap}
.nav a{display:flex;align-items:center;gap:7px;min-height:44px;padding:0 9px;border-radius:4px;font:500 13.5px/1 var(--f-body);color:var(--band-ink-2);text-decoration:none}
.nav a:hover{color:var(--band-ink);background:var(--band-2)}
.nav a[aria-current="true"]{color:var(--band-ink);box-shadow:inset 0 -2px 0 var(--band-accent)}
.lv{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;border-radius:3px;border:1px solid var(--rule-2);font:600 11px/1 var(--f-mono);color:var(--accent);flex:none}
.nav .lv{border-color:var(--band-rule);color:var(--band-accent)}
.depth{flex:none;display:flex;align-items:center}
.depth-l{display:none}
.cta{flex:none;display:inline-flex;align-items:center;min-height:44px;padding:0 15px;border-radius:999px;background:var(--band-accent);color:#08140e;font:700 13px/1 var(--f-body);text-decoration:none}
.cta:hover{filter:brightness(1.08)}
.theme-btn,.present-btn{flex:none;min-height:44px;background:transparent;border:1px solid var(--band-rule);color:var(--band-ink-2);border-radius:999px;padding:0 13px;font:500 12px/1 var(--f-mono);cursor:pointer}
.theme-btn:hover,.present-btn:hover{color:var(--band-ink);border-color:var(--band-ink-2)}
.present-btn{color:var(--band-ink)}
.progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--band-accent);transform-origin:0 50%;transform:scaleX(var(--p,0))}
/* the full nav only leaves room for the sub-label on wide screens */
@media (max-width:1351px){.brand-sub{display:none}}
@media (max-width:900px){
  .topbar .wrap{flex-wrap:wrap;gap:6px 10px;padding-top:8px;padding-bottom:2px}
  .nav{order:5;flex-basis:100%;-webkit-mask-image:linear-gradient(90deg,#000 calc(100% - 24px),transparent);mask-image:linear-gradient(90deg,#000 calc(100% - 24px),transparent)}
  .nav ul{padding-right:24px}
  .brand{margin-right:auto}
  .depth{display:none}
}
@media (max-width:760px){.present-btn{display:none}}
@media (max-width:520px){.topbar .wrap{padding-bottom:0}}
@media (max-width:400px){.wordmark{font-size:14px;letter-spacing:.24em}.cta{padding:0 12px}}
@media (max-width:360px){.topbar .wrap{gap:6px 8px}.wordmark{font-size:12.5px;letter-spacing:.18em}.cta{padding:0 11px}.theme-btn{padding:0 10px}}

/* ---------- beats (read mode) ---------- */
.beat{position:relative;padding-block:76px 68px;background:var(--bg)}
.band-white{background:var(--surface)}
.band-turn{background:var(--accent-wash)}
.band-turn{--ink-3:#535a53}
:root[data-theme="dark"] .band-turn{--ink-3:#93a097}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .band-turn{--ink-3:#93a097}}
.band-turn + .band-turn{box-shadow:inset 0 1px 0 color-mix(in srgb,var(--accent) 22%,transparent)}
.vis-missing{display:none!important}
.beat-in{max-width:1120px;margin:0 auto;padding-left:var(--gutter-l);padding-right:var(--gutter-r);display:flex;flex-direction:column;gap:24px}
.beat-in > *{min-width:0}
.beat-title{font:500 clamp(2rem,3.6vw,2.8rem)/1.08 var(--f-display);letter-spacing:-.012em;max-width:26ch}
.eyebrow,.kicker{font:500 11.5px/1.4 var(--f-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3)}
.kicker + .beat-title,.eyebrow + .beat-title{margin-top:-10px}
.lede{font-size:clamp(1.06rem,1.6vw,1.2rem);line-height:1.58;color:var(--ink-2);max-width:62ch}
.sub{font-size:clamp(1.06rem,1.6vw,1.2rem);line-height:1.58;color:var(--ink-2);max-width:58ch}
.punch{position:relative;font:400 clamp(1.3rem,2.3vw,1.75rem)/1.3 var(--f-display);color:var(--ink);padding-top:16px;max-width:44ch;text-wrap:balance}
.punch::before{content:"";position:absolute;left:0;top:0;width:44px;height:3px;border-radius:2px;background:var(--accent)}
.small-print{font-size:.92rem;line-height:1.5;color:var(--ink-2);max-width:72ch}
.instruct{display:inline-flex;align-items:center;gap:10px;font:600 1rem/1.3 var(--f-body);color:var(--accent)}
.chat-dot{width:10px;height:10px;border-radius:50%;background:var(--accent-2);box-shadow:0 0 0 0 color-mix(in srgb,var(--accent-2) 55%,transparent);flex:none}
.caption-swap{display:grid}
.caption-swap > *{grid-area:1/1}
.vis-foot{display:flex;flex-wrap:wrap;align-items:baseline;gap:10px 18px}

/* ---------- shared components ---------- */
/* quote card */
.qcard{display:grid;gap:8px;padding:2px 0 2px 18px;border-left:3px solid var(--accent);max-width:64ch}
.qcard blockquote p{font:italic 400 1.25rem/1.42 var(--f-display);color:var(--ink)}
.qcard figcaption{font:500 11.5px/1.3 var(--f-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3)}
.qcard.is-plain{border-left:0;padding-left:0}
.qcard.is-plain blockquote p{font-size:1.1rem}
.qcard.is-small blockquote p{font-size:1.05rem;color:var(--ink-2)}
.qcard.is-inline{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 14px;max-width:none}
.qcard.is-inline blockquote p{font-size:1.15rem}
/* numbered badges */
.popt-n{display:grid;place-items:center;width:2rem;height:2rem;border-radius:6px;background:var(--accent-wash);color:var(--accent);font:600 1.15rem/1 var(--f-num);flex:none;font-variant-numeric:tabular-nums}
.is-dark .popt-n{background:var(--band-2);color:var(--band-accent)}
/* pills */
.pills{display:flex;flex-wrap:wrap;gap:8px}
.pills li{font:600 .92rem/1.25 var(--f-body);padding:9px 13px;border-radius:22px}
/* guardrails and the shield list */
.guards{display:flex;flex-wrap:wrap;gap:10px}
.guards li{display:inline-flex;align-items:center;gap:10px;padding:10px 16px 10px 12px;border-radius:999px;background:var(--surface);box-shadow:inset 0 0 0 1px var(--rule-2);font:600 .95rem/1.3 var(--f-body)}
.guards svg,.shield-list svg{width:18px;height:18px;fill:var(--accent-wash);stroke:var(--accent);stroke-width:1.6;flex:none}

/* cover */
.beat-cover{padding-block:72px 64px}
.beat-cover::before{content:"";position:absolute;inset:0;opacity:.07;pointer-events:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
.beat-cover .beat-in{position:relative}
.beat-cover .beat-title{font:400 clamp(2.3rem,5.4vw,4.1rem)/1.04 var(--f-display);letter-spacing:-.022em;max-width:21ch}
.beat-cover .then{display:block;color:var(--band-ink-2)}
.beat-cover .now{display:block;color:var(--band-ink)}
.hero-row{display:grid;grid-template-columns:minmax(0,1fr);gap:12px;padding-bottom:18px;border-bottom:1px solid var(--rule)}
.hero-row .sub{color:var(--ink-2)}
.meta{font:500 12.5px/1.6 var(--f-mono);letter-spacing:.02em;color:var(--ink-3);max-width:72ch;white-space:normal;overflow-wrap:anywhere}

/* stat variants: "x of y" pairs, prefixes and suffixes stay outside the counting span */
.stats .of{font-size:.42em;font-weight:500;color:var(--ink-3);letter-spacing:.02em;margin:0 .1em}
.stats.is-two{grid-template-columns:repeat(2,minmax(0,1fr));max-width:880px}
.gap-stats{display:grid;gap:12px;padding-top:16px;border-top:2px solid var(--ink)}
.stats.is-how b{display:flex;flex-direction:column;align-items:flex-start;gap:6px}
.stats .pre{font:600 .9rem/1.2 var(--f-body);color:var(--ink-2);min-height:1.2em;white-space:pre}
.stats .post{font-size:.4em;font-weight:500;color:var(--ink-2);letter-spacing:.01em}
@media (max-width:760px){.stats.is-two{grid-template-columns:1fr}.stats.is-two li + li{padding-left:0;border-left:0;border-top:1px solid var(--rule);padding-top:12px;margin-top:12px}}

.vs-gap li::before{border:1.5px dashed var(--accent)!important;border-radius:50%!important;width:10px!important;height:10px!important;transform:none!important;top:1.15em!important}

/* design: four tracks with literal status tags */
.tracks{display:grid;border-top:1px solid var(--rule)}
.tracks li{display:grid;grid-template-columns:2rem minmax(0,1fr) auto;gap:8px 18px;align-items:start;padding:14px 0;border-bottom:1px solid var(--rule)}
.tr-txt{line-height:1.55;color:var(--ink-2);padding-top:.2em;max-width:72ch}
.tr-txt b{color:var(--ink)}
.st{justify-self:end;display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;font:600 .86rem/1.25 var(--f-body);background:var(--surface-2);color:var(--ink-2);box-shadow:inset 0 0 0 1px var(--rule-2);white-space:nowrap}
.st.is-good{background:var(--good-wash);color:var(--good-ink);box-shadow:none}
.st-g{font-weight:800}
@media (max-width:700px){.tracks li{grid-template-columns:2rem minmax(0,1fr)}.st{grid-column:2;justify-self:start;white-space:normal}}

/* collapsible detail: full width, read view only, opened for print */
.more{border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.more summary,.about summary{display:flex;align-items:center;gap:12px;min-height:48px;cursor:pointer;list-style:none;font:600 1rem/1.3 var(--f-body);color:var(--ink);-webkit-tap-highlight-color:transparent}
.more summary::-webkit-details-marker,.about summary::-webkit-details-marker{display:none}
.more summary::before,.about summary::before{content:"";flex:none;width:.5em;height:.5em;margin:0 .25em;border-right:2px solid var(--accent);border-bottom:2px solid var(--accent);transform:rotate(-45deg);transition:transform .2s var(--ease)}
.more[open] summary::before,.about[open] summary::before{transform:rotate(45deg)}
.more-list{display:grid;gap:10px;padding:2px 0 18px 28px}
.more-list li{position:relative;line-height:1.55;color:var(--ink-2);max-width:80ch}
.more-list li::before{content:"";position:absolute;left:-18px;top:.62em;width:6px;height:6px;border-radius:50%;background:var(--ink-3)}
html.is-stage .read-only{display:none}

/* bridge cards, stacked vertically */
.bridge.is-stack{grid-template-columns:1fr}
.bridge.is-stack .bridge-link{height:40px}
.bridge.is-stack .bridge-link i{left:24px;right:auto;top:6px;bottom:8px;width:2px;height:auto}
.bridge.is-stack .bridge-link i::after{right:auto;left:-5px;top:auto;bottom:-8px;width:12px;height:10px;-webkit-clip-path:polygon(0 0,100% 0,50% 100%);clip-path:polygon(0 0,100% 0,50% 100%)}

/* built: before/now beside the five steps */
.built-grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:28px 44px;align-items:start}
.sub-h{font:500 1.35rem/1.2 var(--f-display);margin-bottom:10px}
.steps{display:grid;border-top:1px solid var(--rule)}
.steps li{display:grid;grid-template-columns:2rem minmax(0,1fr);gap:14px;align-items:start;padding:12px 0;border-bottom:1px solid var(--rule)}
.steps p{line-height:1.55;color:var(--ink-2);padding-top:.2em}
.steps b{color:var(--ink)}
@media (max-width:860px){.built-grid{grid-template-columns:1fr}}

/* more: two build cards, the stat line and the lesson */
.builds{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 24px}
.build{display:grid;gap:10px;align-content:start;padding:20px 22px 22px;background:var(--bg);border-radius:8px;box-shadow:inset 0 0 0 1px var(--rule)}
.build h3{font:500 1.5rem/1.15 var(--f-display)}
.build p{line-height:1.55;color:var(--ink-2)}
.build .bcard-k{color:var(--ink-3)}
.build .build-st{padding-top:10px;border-top:1px dashed var(--rule-2);font-size:.95rem}
.more-foot{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px 32px;align-items:center}
.stat-line{font:400 clamp(1.15rem,1.9vw,1.4rem)/1.4 var(--f-display);color:var(--ink);max-width:40ch}
.stat-line b{font:600 1.45em/1 var(--f-num);color:var(--accent);font-variant-numeric:tabular-nums}
.callout.is-lesson{padding:14px 18px;border-radius:8px;background:var(--accent-wash);box-shadow:inset 3px 0 0 var(--accent);line-height:1.5;color:var(--ink)}
.callout-k{font:500 11.5px/1.3 var(--f-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-bottom:6px}
@media (max-width:760px){.builds,.more-foot{grid-template-columns:1fr}}

/* numbers: "how we know", one full-width panel open at a time */
.how{display:grid;gap:14px}
.how-btn{justify-self:start;align-self:start;display:inline-flex;white-space:nowrap;align-items:center;gap:9px;min-height:44px;margin-top:6px;padding:0 15px 0 13px;border-radius:999px;border:1px solid var(--rule-2);background:transparent;color:var(--ink);font:600 .9rem/1 var(--f-body);cursor:pointer;-webkit-tap-highlight-color:transparent;touch-action:manipulation}
.how-btn::after{content:"";width:.42em;height:.42em;margin-top:-.2em;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg);transition:transform .2s var(--ease)}
.how-btn[aria-expanded="true"]{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.how-btn[aria-expanded="true"]::after{transform:rotate(-135deg);margin-top:.2em}
@media (hover:hover){.how-btn:hover{border-color:var(--accent)}}
.how-panels{display:grid}
@media (max-width:400px){.how-btn{padding:0 11px 0 10px;gap:6px;font-size:.84rem}.stats.is-how li{padding-right:8px}.stats.is-how li + li{padding-left:10px}}
.how-p{display:none;padding:14px 18px;border-radius:8px;background:var(--accent-wash);line-height:1.55;color:var(--ink);max-width:none}
.how-p.is-open{display:block}

/* limits: two quotes side by side */
.quotes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 36px}
@media (max-width:760px){.quotes{grid-template-columns:1fr}}

/* lessons: the follow-up line under each card */
.ranked .rank-f{grid-area:f;font-size:.96rem;line-height:1.5;color:var(--ink);padding-top:10px;border-top:1px dashed var(--rule-2)}
.ranked.is-lessons .rank-d{font-variant-numeric:tabular-nums}

/* changed: five rows */
.chg-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 14px}
.chg-list li{padding:14px 18px;background:var(--bg);border-radius:6px;box-shadow:inset 4px 0 0 var(--accent);line-height:1.5;color:var(--ink-2)}
.chg-list b{color:var(--ink)}
@media (max-width:760px){.chg-list{grid-template-columns:1fr}}

/* pilot: what we learned there, so for the pilot */
.map{display:grid}
.map-head{display:grid;grid-template-columns:minmax(0,.85fr) 3rem minmax(0,1.5fr);padding-bottom:8px;border-bottom:2px solid var(--rule-2);font:500 11.5px/1.3 var(--f-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3)}
.map-head span:last-child{grid-column:3}
.map-rows li{display:grid;grid-template-columns:minmax(0,.85fr) 3rem minmax(0,1.5fr);align-items:center;padding:12px 0;border-bottom:1px solid var(--rule)}
.map-l{font:400 1.1rem/1.35 var(--f-display);color:var(--ink-2)}
.map-arrow{position:relative;height:2px;margin:0 10px 0 6px;background:var(--accent)}
.map-arrow::after{content:"";position:absolute;right:-2px;top:-5px;width:9px;height:12px;background:var(--accent);-webkit-clip-path:polygon(0 0,100% 50%,0 100%);clip-path:polygon(0 0,100% 50%,0 100%)}
.map-r{line-height:1.5;color:var(--ink-2)}
.map-r b{color:var(--ink)}
@media (max-width:700px){
  .map-head{display:none}
  .map-rows li{grid-template-columns:1fr;gap:4px;padding:14px 0}
  .map-arrow{display:none}
  .map-l{font:500 12px/1.4 var(--f-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}
}
.path{position:relative;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}
.path::before{content:"";position:absolute;left:8px;right:12%;top:7px;height:2px;background:var(--accent);opacity:.45}
.path li{position:relative;padding-top:28px;font:600 .98rem/1.35 var(--f-body);color:var(--ink)}
.path li::before{content:"";position:absolute;left:0;top:0;width:16px;height:16px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px var(--bg)}
@media (max-width:700px){
  .path{grid-template-columns:1fr;gap:12px;padding-left:30px}
  .path::before{left:7px;right:auto;top:10px;bottom:10px;width:2px;height:auto}
  .path li{padding-top:0}
  .path li::before{left:-30px;top:.2em}
}

/* next steps: the CTA on the dark band */
.next-end{display:flex;flex-wrap:wrap;align-items:center;gap:16px 28px;padding-top:6px}
.btn-cta{display:inline-flex;align-items:center;min-height:52px;padding:0 26px;border-radius:999px;background:var(--band-accent);color:#08140e;font:700 1.05rem/1 var(--f-body);text-decoration:none}
.btn-cta:hover{filter:brightness(1.08)}
.close-line{font:400 1.3rem/1.4 var(--f-display);color:var(--ink)}

/* footer: About Alex */
.foot .about summary{color:var(--band-ink);font-size:14px}
.foot .about summary::before{border-color:var(--band-accent)}
.about-in{display:grid;gap:10px;padding:4px 0 6px;max-width:72ch}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chips li{font:500 12.5px/1.35 var(--f-body);padding:6px 11px;border-radius:999px;box-shadow:inset 0 0 0 1px var(--band-rule);color:var(--band-ink-2)}
.foot a{display:inline-flex;align-items:center;min-height:44px;color:var(--band-accent)}


/* bridge cards */
.bridge{display:grid;grid-template-columns:minmax(0,1fr) 72px minmax(0,1fr);align-items:stretch}
.bcard{display:grid;gap:10px;align-content:start;padding:18px 0 4px;border-top:2px solid var(--rule-2)}
.bcard.is-now{border-top:0;background:var(--accent-wash);padding:20px 22px 22px;border-radius:8px}
.bcard-k{font:500 11.5px/1.3 var(--f-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3)}
.bcard.is-now .bcard-k{color:var(--accent)}
.bcard-p{font-size:1.04rem;line-height:1.55;color:var(--ink-2);max-width:46ch}
.bcard.is-now .bcard-p{color:var(--ink)}
.bridge-link{position:relative;display:block}
.bridge-link i{position:absolute;left:12px;right:12px;top:50%;height:2px;background:var(--accent)}
.bridge-link i::after{content:"";position:absolute;right:-2px;top:-5px;width:10px;height:12px;background:var(--accent);-webkit-clip-path:polygon(0 0,100% 50%,0 100%);clip-path:polygon(0 0,100% 50%,0 100%)}
@media (max-width:700px){.bridge{grid-template-columns:1fr}.bridge-link{height:36px}.bridge-link i{left:24px;right:auto;top:6px;bottom:6px;width:2px;height:auto}.bridge-link i::after{right:auto;left:-5px;top:auto;bottom:-8px;width:12px;height:10px;-webkit-clip-path:polygon(0 0,100% 0,50% 100%);clip-path:polygon(0 0,100% 0,50% 100%)}}

/* chapter bands (read mode) */
.levelband{background:var(--surface-2);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.levelband .wrap{padding-block:30px 28px;display:grid;grid-template-columns:auto minmax(0,1fr);gap:18px 36px;align-items:center}
.lv-num{font:600 clamp(3.4rem,6.5vw,5rem)/.8 var(--f-num);color:var(--accent);min-width:.6em}
.lv-txt{display:grid;gap:6px}
.lv-txt h2{font:500 clamp(1.7rem,3vw,2.3rem)/1.1 var(--f-display)}
/* ranked cards and stat tiles */
.ranked{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px 24px}
.ranked li{display:grid;grid-template-columns:auto minmax(0,1fr);grid-template-areas:"n t" "d d" "f f";gap:10px 14px;align-content:start;padding:18px 20px 20px;background:var(--bg);border-radius:8px;box-shadow:inset 0 0 0 1px var(--rule)}
.ranked .rank-n{grid-area:n}
.ranked .rank-t{grid-area:t;align-self:center}
.ranked .rank-d{grid-area:d}
.rank-n{font:600 3rem/.8 var(--f-num);color:var(--accent);font-variant-numeric:tabular-nums}
.rank-t b{font:700 1.06rem/1.3 var(--f-body);color:var(--ink)}
.rank-d{font-size:.98rem;line-height:1.5;color:var(--ink-2)}
@media (max-width:899px){.ranked{grid-template-columns:1fr}}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr))}
.stats li{display:grid;gap:6px;align-content:start;padding:2px 18px 2px 0}
.stats li + li{padding-left:18px;border-left:1px solid var(--rule)}
.stats b{font:600 clamp(2.4rem,4.4vw,3.4rem)/.9 var(--f-num);color:var(--ink);font-variant-numeric:tabular-nums;white-space:nowrap}
.stat-l{font-size:.95rem;line-height:1.4;color:var(--ink-2)}
@media (max-width:760px){.stats{grid-template-columns:1fr 1fr}.stats li:nth-child(3){padding-left:0;border-left:0}.stats li:nth-child(n+3){border-top:1px solid var(--rule);padding-top:12px;margin-top:12px}}

/* versus columns */
.versus{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.08fr);gap:28px 40px;align-items:start}
.vs-col h3{font:500 1.4rem/1.2 var(--f-display);padding-bottom:12px;border-bottom:2px solid var(--rule-2)}
.vs-col li{position:relative;padding:13px 0 13px 30px;border-bottom:1px solid var(--rule);font-size:1.04rem;line-height:1.45;color:var(--ink-2)}
.vs-col li::before{content:"";position:absolute;left:3px;top:1.15em;width:10px;height:10px;border-radius:50%;border:1.5px solid var(--ink-3)}
.vs-own{background:var(--accent-wash);padding:20px 24px 10px;border-radius:8px}
.vs-own h3{border-bottom-color:var(--accent)}
.vs-own li{color:var(--ink);border-bottom-color:color-mix(in srgb,var(--accent) 22%,transparent)}
.vs-own li:last-child{border-bottom:0}
.vs-own li::before{border:0;border-radius:0;width:11px;height:6px;top:1.05em;border-left:2.5px solid var(--accent);border-bottom:2.5px solid var(--accent);transform:rotate(-45deg)}
@media (max-width:760px){.versus{grid-template-columns:1fr}}

/* shield list and the amber callout */
.shield-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 40px}
.shield-list li{display:grid;grid-template-columns:18px minmax(0,1fr);gap:12px;align-items:start;line-height:1.55}
.shield-list svg{margin-top:.18em}
@media (max-width:899px){.shield-list{grid-template-columns:1fr}}
.callout.is-amber{padding:16px 20px;border-radius:8px;background:var(--warn-wash);box-shadow:inset 0 0 0 2px var(--warn);color:var(--ink);max-width:84ch;line-height:1.6}

/* numbered list on the dark band */
.decide{display:grid;border-top:1px solid var(--rule)}
.decide li{display:grid;grid-template-columns:2.6rem minmax(0,1fr);gap:16px;align-items:start;padding:14px 0;border-bottom:1px solid var(--rule)}
.decide .popt-n{width:2.4rem;height:2.4rem;font-size:1.5rem}
.decide p{font-size:1.08rem;line-height:1.5;padding-top:.2em}
.decide b{color:var(--ink)}

/* visuals (contract: visuals.js renders inside .visual) */
.vis-wrap{position:relative;display:grid;gap:8px}
.vis-scroll{overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch;overscroll-behavior-x:contain;scrollbar-width:thin}
.visual{position:relative;min-height:60px}
.visual:not(.is-mounted){min-height:220px}
.visual:empty.is-mounted{min-height:0}
.swipe-hint{display:none;font:500 11.5px/1.3 var(--f-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);order:-1}
.vis-wrap.is-wide .swipe-hint{display:block}
.replay{justify-self:end;display:inline-flex;align-items:center;gap:7px;min-height:44px;padding:0 14px;border-radius:999px;border:1px solid var(--rule-2);background:transparent;color:var(--ink-2);font:600 .85rem/1 var(--f-body);cursor:pointer}
.replay:hover{color:var(--ink);border-color:var(--accent)}
.replay svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:1.8}

/* read mode: no live-session prompts for someone reading afterwards */
html:not(.is-stage) .instruct{display:none}
html:not(.is-stage) .caption-swap .show-at-start{display:none}

/* footer */
.foot{background:var(--band);color:var(--band-ink-2)}
.foot .wrap{padding-block:36px calc(44px + env(safe-area-inset-bottom, 0px));display:flex;flex-wrap:wrap;gap:16px 40px;align-items:start;justify-content:space-between}
.foot .wordmark{color:var(--band-ink);font-size:14px;padding-top:4px}
.foot-txt{display:grid;gap:6px;max-width:72ch}
.foot p{font-size:13.5px;line-height:1.6;overflow-wrap:anywhere}

/* stage chrome, flash and key map: hidden outside stage mode */
.stage-ui{display:none}
.levelflash{display:none}
.keymap{position:fixed;inset:0;z-index:80;display:grid;place-items:center;padding:20px;background:color-mix(in srgb,var(--band) 62%,transparent);-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}
.km-card{width:min(640px,100%);max-height:calc(100dvh - 40px);overflow:auto;background:var(--surface);color:var(--ink);border-radius:12px;padding:24px 26px;box-shadow:0 30px 60px -30px rgba(0,0,0,.6)}
.km-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.km-top h2{font:500 1.6rem/1.1 var(--f-display)}
.km-close{min-height:44px;padding:0 16px;border-radius:999px;border:1px solid var(--rule-2);background:transparent;cursor:pointer;font:600 .9rem/1 var(--f-body)}
.km-list{display:grid}
.km-list > div{display:grid;grid-template-columns:minmax(0,15em) minmax(0,1fr);gap:16px;padding:9px 0;border-top:1px solid var(--rule);align-items:center}
.km-list dt{display:flex;flex-wrap:wrap;gap:4px;align-items:center;font-size:.85rem;color:var(--ink-3)}
.km-list dd{font-size:.98rem}
@media (max-width:520px){.km-list > div{grid-template-columns:1fr;gap:4px}}

/* =====================================================================
   STAGE MODE
   ===================================================================== */
html.is-stage{--u:min(calc(100vw / 1440), calc(100dvh / 900), 1.5px);font-size:calc(var(--u) * 16);overflow:hidden;scroll-behavior:auto}
@supports not (height:100dvh){html.is-stage{--u:min(calc(100vw / 1440), 1.5px)}}
html.is-stage body{overflow:hidden;height:100dvh;overscroll-behavior:none}
@supports not (height:100dvh){html.is-stage body{height:100%}}
html.is-stage .topbar,html.is-stage .foot,html.is-stage .levelband,html.is-stage .skip{display:none}
html.is-stage .deck{position:fixed;inset:0;overflow:hidden;overflow:clip;background:var(--bg)}
html.is-stage .beat{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;justify-content:safe center;padding:3.2rem max(7.5rem, calc((100vw - 75rem) / 2)) 4.2rem;opacity:0;visibility:hidden;pointer-events:none;transform:translateX(2.5rem);transition:opacity .34s var(--ease),transform .42s var(--ease),visibility 0s linear .42s;overflow:hidden;overflow:clip}
html.is-stage .beat.is-before{transform:translateX(-2.5rem)}
html.is-stage .beat.is-current{opacity:1;visibility:visible;pointer-events:auto;transform:none;transition-delay:0s}
html.is-stage .band-white{background:var(--bg)}
html.is-stage .band-turn + .band-turn{box-shadow:none}
html.is-stage .beat-in{width:100%;max-width:75rem;margin:0 auto;padding:0;gap:1.5rem}
/* the reading page's paper grain turns blocky in a screen-share encoder */
html.is-stage .beat-cover::before{display:none}

/* stage type: 1rem = 16px at 1440x900; nothing on stage is set below 1rem */
html.is-stage .beat-title{font-size:4.5rem;line-height:1.04;letter-spacing:-.018em;max-width:none}
html.is-stage .eyebrow,html.is-stage .kicker{font-size:1rem;letter-spacing:.14em}
html.is-stage .kicker + .beat-title,html.is-stage .eyebrow + .beat-title{margin-top:-.5rem}
html.is-stage .lede,html.is-stage .sub{font-size:1.5rem;line-height:1.48;max-width:58ch}
html.is-stage .punch{font-size:2.1rem;line-height:1.25;padding-top:1rem;max-width:none}
html.is-stage .punch::before{width:3.25rem;height:.2rem}
html.is-stage .instruct{font-size:1.35rem;gap:.8rem}
html.is-stage .chat-dot{width:.8rem;height:.8rem}
html.is-stage .small-print{font-size:1.05rem;max-width:none}
html.is-stage .cc-k{font-size:max(1rem,.95em)}
html.is-stage .qcard{gap:.5rem;padding-left:1.2rem;border-left-width:.2rem}
html.is-stage .qcard blockquote p{font-size:1.6rem;line-height:1.36}
html.is-stage .qcard figcaption{font-size:1rem}
html.is-stage .qcard.is-plain,html.is-stage .qcard.is-inline{padding-left:0;border-left:0}
html.is-stage .vis-foot{gap:.5rem 1.2rem}
html.is-stage .popt-n{width:2.4rem;height:2.4rem;font-size:1.5rem;border-radius:.4rem}

/* stage visual boxes: each SVG viewBox equals its box in px at 1440x900 */
html.is-stage .vis-wrap{width:var(--vis-w,75rem);max-width:100%;align-self:center}
html.is-stage .vis-scroll{overflow:visible}
html.is-stage .visual{width:100%;height:var(--vis-h,35rem);min-height:0;overflow:hidden;overflow:clip}
html.is-stage .visual > *{max-width:100%;max-height:100%}
html.is-stage .visual > svg{width:100%;height:100%}
html.is-stage .replay,html.is-stage .swipe-hint{display:none}

/* phases and step reveals (read mode shows everything) */
html.is-stage [data-sb-phase]:not(.is-on){display:none}
html.is-stage [data-sb-at]{transition:opacity .45s var(--ease),transform .5s var(--ease),visibility 0s}
html.is-stage [data-sb-at]:not(.is-on){opacity:0;visibility:hidden;transform:translateY(.8rem);transition:opacity .2s,transform .2s,visibility 0s linear .2s}
html.is-stage .show-at-final,html.is-stage .show-at-start{transition:opacity .45s var(--ease),visibility 0s}
html.is-stage .beat[data-vfinal="0"] .show-at-final{opacity:0;visibility:hidden}
html.is-stage .beat:not([data-vstep="0"]) .show-at-start{opacity:0;visibility:hidden}
/* swap beats: on stage the lede and the punch share one slot under the title */
html.is-stage .beat-swap.has-visual .beat-in{display:grid;grid-template-columns:minmax(0,1fr);grid-template-areas:"kicker" "title" "swap" "vis" "foot";align-content:start}
html.is-stage .beat-swap.has-visual .beat-in > .kicker{grid-area:kicker}
html.is-stage .beat-swap.has-visual .beat-in > .beat-title{grid-area:title}
html.is-stage .beat-swap.has-visual .beat-in > .swap{grid-area:swap;align-self:start}
html.is-stage .beat-swap.has-visual .beat-in > .vis-wrap{grid-area:vis;justify-self:center}
html.is-stage .beat-swap.has-visual .beat-in > .vis-foot{grid-area:foot}
html.is-stage .beat-swap:not(.has-visual) .show-at-start{opacity:1;visibility:visible}

/* entry choreography: a short stagger on the current beat */
@media (prefers-reduced-motion: no-preference){
  html.is-stage .beat.is-current .beat-in > *{animation:rise .6s var(--ease) both}
  html.is-stage .beat.is-current .beat-in > :nth-child(2){animation-delay:60ms}
  html.is-stage .beat.is-current .beat-in > :nth-child(3){animation-delay:120ms}
  html.is-stage .beat.is-current .beat-in > :nth-child(4){animation-delay:180ms}
  html.is-stage .beat.is-current .beat-in > :nth-child(n+5){animation-delay:240ms}
  html.is-stage .chat-dot{animation:pulse 1.8s ease-out infinite}
}
@keyframes rise{from{opacity:0;transform:translateY(1rem)}}
@keyframes pulse{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--accent-2) 55%,transparent)}70%{box-shadow:0 0 0 .7rem transparent}100%{box-shadow:0 0 0 0 transparent}}

/* stage type for content slides; dense slides a step smaller */
html.is-stage .beat:not(.beat-cover) .beat-title{font-size:3.6rem;line-height:1.06}
html.is-stage .beat-design .beat-title,html.is-stage .beat-built .beat-title,html.is-stage .beat-more .beat-title,html.is-stage .beat-pilot .beat-title,html.is-stage .beat-loop .beat-title,html.is-stage .beat-apps .beat-title,html.is-stage .beat-timeline .beat-title{font-size:3.1rem}
html.is-stage .beat:not(.beat-cover) .lede{font-size:1.35rem;line-height:1.45;max-width:66ch}
/* top-aligned slides keep their title still while blocks below them change */
html.is-stage .beat .beat-in{gap:1.15rem}

/* stage visual boxes: each SVG viewBox equals its box in px at 1440x900 */
html.is-stage .beat-spectrum{--vis-w:75rem;--vis-h:23rem}
html.is-stage .beat-loop{--vis-w:75rem;--vis-h:25rem}
html.is-stage .beat.beat-loop .lede{max-width:none}
html.is-stage .beat-timeline{--vis-w:75rem;--vis-h:27rem}
html.is-stage .beat-timeline .tl-stats{display:none}
html.is-stage .beat.beat-timeline .lede{max-width:84ch}

/* shared components on stage */
html.is-stage .versus{gap:1.5rem 3rem}
html.is-stage .vs-col h3{font-size:1.55rem;padding-bottom:.5rem;border-bottom-width:.15rem}
html.is-stage .vs-col li{font-size:1.18rem;line-height:1.35;padding:.5rem 0 .5rem 2.1rem}
html.is-stage .vs-col li::before{left:.3rem;top:.95em;width:.8rem;height:.8rem}
html.is-stage .vs-own{padding:.9rem 1.6rem .2rem;border-radius:.6rem}
html.is-stage .vs-own li::before{width:.9rem;height:.48rem;top:.85em;border-left-width:.18rem;border-bottom-width:.18rem}
html.is-stage .vs-own[data-sb-at]:not(.is-on){transform:translateX(2rem)}
html.is-stage .stats li{padding:0 1.4rem 0 0;gap:.35rem}
html.is-stage .stats li + li{padding-left:1.4rem}
html.is-stage .stats b{font-size:3.6rem;line-height:.9}
html.is-stage .stat-l{font-size:1.1rem;line-height:1.3}
html.is-stage .stats .pre{font-size:1.05rem}
html.is-stage .guards{gap:.7rem}
html.is-stage .guards li{font-size:1.1rem;padding:.6rem 1.1rem .6rem .8rem;gap:.6rem}
html.is-stage .guards svg{width:1.25rem;height:1.25rem}
html.is-stage .guards li{transition:opacity .45s var(--ease),transform .5s var(--ease)}
html.is-stage .guards:not(.is-on) li{opacity:0;transform:translateY(.5rem)}
html.is-stage .guards.is-on li:nth-child(2){transition-delay:140ms}
html.is-stage .guards.is-on li:nth-child(3){transition-delay:280ms}
html.is-stage .guards.is-on li:nth-child(4){transition-delay:420ms}
html.is-stage .guards.is-on li:nth-child(5){transition-delay:560ms}
html.is-stage .ranked{gap:1.4rem}
html.is-stage .ranked li{padding:1.1rem 1.3rem 1.2rem;gap:.55rem 1rem;border-radius:.6rem}
html.is-stage .rank-n{font-size:3.6rem}
html.is-stage .rank-t b{font-size:1.3rem}
html.is-stage .rank-d{font-size:1.12rem;line-height:1.42}
html.is-stage .ranked .rank-f{font-size:1.08rem;line-height:1.42;padding-top:.6rem}
html.is-stage .qcard{gap:.5rem;padding-left:1.2rem;border-left-width:.2rem}
html.is-stage .qcard blockquote p{font-size:1.5rem;line-height:1.36}
html.is-stage .qcard figcaption{font-size:1rem}
html.is-stage .small-print{font-size:1.05rem;max-width:none}
html.is-stage .popt-n{width:2.4rem;height:2.4rem;font-size:1.5rem;border-radius:.4rem}
html.is-stage .punch{font-size:1.95rem}

/* stage: cover */
html.is-stage .beat-cover{padding-left:max(6rem, calc((100vw - 78rem) / 2));padding-right:max(6rem, calc((100vw - 78rem) / 2))}
html.is-stage .beat-cover .beat-in{gap:1.4rem;max-width:78rem}
html.is-stage .beat-cover .eyebrow + .beat-title{margin-top:.2rem}
html.is-stage .beat-cover .beat-title{font-size:5.2rem;line-height:1.02;letter-spacing:-.024em;max-width:19ch}
html.is-stage .hero-row{gap:.8rem;padding-bottom:1.3rem}
html.is-stage .hero-row .sub{font-size:1.5rem;line-height:1.48;max-width:62ch}
html.is-stage .meta{font-size:1rem;line-height:1.45;max-width:none}
html.is-stage .beat-cover .instruct{font-size:1.15rem;color:var(--band-ink-2)}

/* stage: the starting point */
html.is-stage .beat.beat-gap .lede{max-width:84ch}
html.is-stage .gap-stats{grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);align-items:end;column-gap:2.5rem}
html.is-stage .vs-gap li::before{width:.8rem!important;height:.8rem!important;top:.95em!important}
html.is-stage .gap-stats{gap:.5rem;padding-top:.8rem;border-top-width:.15rem}
html.is-stage .stats.is-two{max-width:none}
html.is-stage .stats.is-two b{font-size:3.3rem}

/* stage: programme design */
html.is-stage .tracks li{grid-template-columns:2.4rem minmax(0,1fr) auto;gap:.4rem 1.4rem;padding:.75rem 0;align-items:center}
html.is-stage .tr-txt{font-size:1.18rem;line-height:1.42;max-width:none;padding-top:0}
html.is-stage .st{font-size:1.02rem;padding:.4rem .9rem}

/* stage: the session loop and the spectrum keep their punch line close */
html.is-stage .beat-loop .beat-in,html.is-stage .beat-spectrum .beat-in{gap:1rem}

/* stage: timeline (counters and punch line share the last row) */
html.is-stage .beat-timeline.has-visual .beat-in{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);grid-template-areas:"kicker kicker" "title title" "lede lede" "vis vis" "punch punch";column-gap:3rem;align-content:start}
html.is-stage .beat-timeline.has-visual .beat-in > .kicker{grid-area:kicker}
html.is-stage .beat-timeline.has-visual .beat-in > .beat-title{grid-area:title}
html.is-stage .beat-timeline.has-visual .beat-in > .lede{grid-area:lede}
html.is-stage .beat-timeline.has-visual .beat-in > .vis-wrap{grid-area:vis;justify-self:center}
html.is-stage .beat-timeline.has-visual .beat-in > .tl-stats{grid-area:stats}
html.is-stage .beat-timeline.has-visual .beat-in > .punch{grid-area:punch;align-self:center;font-size:1.7rem}
html.is-stage .tl-stats b{font-size:3.2rem}

/* stage: apps */
html.is-stage .beat-apps .ranked li{grid-template-areas:"n t" "d d"}

/* stage: built (before and now on the left, the five steps on the right) */
html.is-stage .beat.beat-built .lede{max-width:none;font-size:1.25rem}
html.is-stage .built-grid{grid-template-columns:minmax(0,25rem) minmax(0,1fr);gap:1rem 3rem}
html.is-stage .bcard{gap:.6rem;padding:1rem 0 .3rem;border-top-width:.15rem}
html.is-stage .bcard.is-now{padding:1rem 1.4rem 1.2rem;border-radius:.6rem}
html.is-stage .bcard-k{font-size:1rem}
html.is-stage .bcard-p{font-size:1.15rem;line-height:1.42;max-width:none}
html.is-stage .bridge.is-stack .bridge-link{height:2.2rem}
html.is-stage .bridge-link i{height:.15rem}
html.is-stage .bridge.is-stack .bridge-link i{width:.15rem;height:auto}
html.is-stage .bcard.is-now[data-sb-at]:not(.is-on){transform:translateY(1rem)}
html.is-stage .sub-h{font-size:1.4rem;margin-bottom:.4rem}
html.is-stage .steps li{grid-template-columns:2.4rem minmax(0,1fr);gap:1rem;padding:.4rem 0;align-items:center}
html.is-stage .steps p{font-size:1.12rem;line-height:1.4;padding-top:0}
html.is-stage .beat-built .small-print{font-size:1rem}
html.is-stage .beat-built .punch{font-size:1.7rem}

/* stage: two more builds */
html.is-stage .builds{gap:1.4rem}
html.is-stage .build{gap:.6rem;padding:1.2rem 1.4rem 1.3rem;border-radius:.6rem}
html.is-stage .build h3{font-size:1.7rem}
html.is-stage .build p{font-size:1.12rem;line-height:1.42}
html.is-stage .build .bcard-k{font-size:1rem}
html.is-stage .build .build-st{font-size:1.05rem;padding-top:.6rem}
html.is-stage .more-foot{gap:1rem 2.5rem}
html.is-stage .stat-line{font-size:1.45rem;max-width:none}
html.is-stage .callout.is-lesson{font-size:1.2rem;padding:.9rem 1.3rem;border-radius:.6rem}
html.is-stage .callout-k{font-size:1rem}

/* stage: numbers (each "how we know" line sits under its tile) */
html.is-stage .how{gap:.8rem}
html.is-stage .how-btn{display:none}
html.is-stage .how-panels{grid-template-columns:repeat(4,minmax(0,1fr))}
html.is-stage .how-p{display:block;padding:0 1.4rem 0 0;background:none;border-radius:0;font-size:1.05rem;line-height:1.45;color:var(--ink-2)}
html.is-stage .how-p + .how-p{padding-left:1.4rem;border-left:1px solid var(--rule)}
html.is-stage .how-p b{color:var(--ink)}
html.is-stage .stats.is-how b{gap:.4rem}

/* stage: limits */
html.is-stage .shield-list{gap:.9rem 3rem}
html.is-stage .shield-list li{grid-template-columns:1.25rem minmax(0,1fr);gap:.8rem;font-size:1.15rem;line-height:1.42}
html.is-stage .shield-list svg{width:1.25rem;height:1.25rem}
html.is-stage .quotes{gap:1rem 3rem}

/* stage: changed */
html.is-stage .chg-list{gap:.7rem 1.2rem}
html.is-stage .chg-list li{font-size:1.15rem;line-height:1.42;padding:.8rem 1.2rem;box-shadow:inset .25rem 0 0 var(--accent)}

/* stage: pilot (mapping on the left; the path and the tool note on the right) */
html.is-stage .beat-pilot .beat-in{display:grid;grid-template-columns:minmax(0,1fr) 22rem;grid-template-areas:"kicker kicker" "title title" "lede lede" "map path" "map note" "punch punch";column-gap:3rem;row-gap:1rem;align-content:start}
html.is-stage .beat-pilot .beat-in > .kicker{grid-area:kicker}
html.is-stage .beat-pilot .beat-in > .beat-title{grid-area:title}
html.is-stage .beat-pilot .beat-in > .lede{grid-area:lede}
html.is-stage .beat-pilot .beat-in > .map{grid-area:map;align-self:start}
html.is-stage .beat-pilot .beat-in > .path{grid-area:path;align-self:start}
html.is-stage .beat-pilot .beat-in > .callout{grid-area:note;align-self:start}
html.is-stage .beat-pilot .beat-in > .punch{grid-area:punch}
html.is-stage .map-head{font-size:1rem;padding-bottom:.4rem;grid-template-columns:minmax(0,.8fr) 3rem minmax(0,1.5fr)}
html.is-stage .map-rows li{grid-template-columns:minmax(0,.8fr) 3rem minmax(0,1.5fr);padding:.55rem 0}
html.is-stage .map-l{font-size:1.15rem}
html.is-stage .map-r{font-size:1.1rem;line-height:1.4}
html.is-stage .path{grid-template-columns:1fr;gap:.55rem;padding-left:2rem}
html.is-stage .path::before{left:.45rem;right:auto;top:.6rem;bottom:.6rem;width:.15rem;height:auto}
html.is-stage .path li{padding-top:0;font-size:1.1rem}
html.is-stage .path li::before{left:-2rem;top:.2em;width:1rem;height:1rem}
html.is-stage .beat-pilot .callout.is-amber{font-size:1.05rem;line-height:1.45;padding:.8rem 1.1rem;border-radius:.6rem;max-width:none}
html.is-stage .beat-pilot .punch{font-size:1.8rem}

/* stage: next steps */
html.is-stage .decide li{grid-template-columns:3.4rem minmax(0,1fr);gap:1.2rem;padding:.9rem 0;align-items:center}
html.is-stage .decide .popt-n{width:3.1rem;height:3.1rem;font-size:2.4rem}
html.is-stage .decide p{font-size:1.4rem;line-height:1.4;padding-top:0}
html.is-stage .next-end{gap:1rem 2.5rem;padding-top:.6rem}
html.is-stage .btn-cta{min-height:3.6rem;padding:0 2rem;font-size:1.25rem}
html.is-stage .close-line{font-size:1.6rem}


/* stage chrome */
html.is-stage .stage-ui{display:block}
.rail{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;gap:.2rem;padding:calc(env(safe-area-inset-top, 0px) + 1.25rem) 2.5rem 0;pointer-events:none}
.rail i{position:relative;flex:var(--g,1) 1 0;height:.32rem;border-radius:.1rem;overflow:hidden;background:color-mix(in srgb,var(--lvc) 30%,transparent)}
.rail i.done{background:var(--lvc)}
.rail i b{position:absolute;inset:0;transform:scaleX(var(--sp,0));transform-origin:0 50%;background:var(--lvc);transition:transform .4s var(--ease)}
.rail i.cur{box-shadow:0 0 0 .12rem color-mix(in srgb,var(--lvc) 45%,transparent)}
.rail i[data-l="0"]{--lvc:var(--lv0)}
.rail i[data-l="1"]{--lvc:var(--lv1)}
.rail i[data-l="2"]{--lvc:var(--lv2)}
.rail i[data-l="3"]{--lvc:var(--lv3)}
.stage-foot{position:fixed;left:0;right:0;bottom:0;z-index:50;display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:0 2.5rem calc(env(safe-area-inset-bottom, 0px) + 1.1rem);font:500 1rem/1 var(--f-mono);letter-spacing:.08em;color:var(--ink-3);pointer-events:none}
html.is-stage body[data-cur-dark="1"] .stage-foot{color:var(--band-ink-2)}
.sf-level{display:inline-flex;align-items:center;gap:.7rem;text-transform:uppercase}
.sf-level::before{content:"";width:.7rem;height:.7rem;border-radius:.1rem;background:var(--lvc,var(--lv0));transform:rotate(45deg)}
.sf-level[data-l="1"]{--lvc:var(--lv1)}
.sf-level[data-l="2"]{--lvc:var(--lv2)}
.sf-level[data-l="3"]{--lvc:var(--lv3)}
.sf-right{display:inline-flex;align-items:center;gap:1rem}
.sf-dots{display:inline-flex;gap:.35rem}
.sf-dots i{width:.45rem;height:.45rem;border-radius:50%;background:currentColor;opacity:.3}
.sf-dots i.on{opacity:1;background:var(--accent)}
html.is-stage body[data-cur-dark="1"] .sf-dots i.on{background:var(--band-accent)}
.sf-count{font:600 1.3rem/1 var(--f-num);letter-spacing:.06em;font-variant-numeric:tabular-nums}
.sf-btn{pointer-events:auto;display:inline-flex;align-items:center;justify-content:center;min-width:max(44px,2.75rem);height:max(44px,2.75rem);padding:0 .8rem;-webkit-tap-highlight-color:transparent;touch-action:manipulation;border-radius:999px;border:1px solid currentColor;background:transparent;color:inherit;font:600 1rem/1 var(--f-mono);letter-spacing:.06em;cursor:pointer}
.sf-btn:hover,.sf-btn:focus-visible{color:var(--ink)}
.sf-btn:disabled{opacity:.35;cursor:default}
.sf-nav{font:600 1.35rem/1 var(--f-body);letter-spacing:0}
.sf-exit{padding:0 1.1rem;letter-spacing:.04em}
.sf-right{flex-wrap:nowrap}
html.is-stage body[data-cur-dark="1"] .sf-btn:hover,html.is-stage body[data-cur-dark="1"] .sf-btn:focus-visible{color:var(--band-ink)}

/* chapter flash: a chapter card between parts, stage only */
html.is-stage .levelflash.is-on{position:fixed;inset:0;z-index:60;display:grid;place-items:center;background:var(--surface-2);color:var(--ink);animation:lfade 1.5s var(--ease) both;pointer-events:none}
.lf-in{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:1.5rem 3.5rem;width:75rem;max-width:calc(100vw - 4rem)}
.lf-num{font:600 17rem/.8 var(--f-num);color:var(--accent);min-width:.6em}
.lf-txt{display:grid;gap:.8rem;align-self:center}
.lf-eye{font:500 1.15rem/1.3 var(--f-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3)}
.lf-h{font:500 5.5rem/1.02 var(--f-display);letter-spacing:-.02em}
@media (prefers-reduced-motion: no-preference){
  html.is-stage .levelflash.is-on .lf-num{animation:lfnum 1.1s var(--ease) both}
  html.is-stage .levelflash.is-on .lf-txt{animation:rise .7s .12s var(--ease) both}
}
@keyframes lfade{0%{opacity:0}14%{opacity:1}76%{opacity:1}100%{opacity:0}}
@keyframes lfnum{from{opacity:0;transform:translateY(2.5rem) scale(.96)}}
@keyframes grow{from{transform:scaleX(0)}}

/* =====================================================================
   PRESENTER CONSOLE (?presenter)
   ===================================================================== */
html.is-presenter .topbar,html.is-presenter .deck,html.is-presenter .foot,html.is-presenter .stage-ui,html.is-presenter .skip{display:none}
html.is-presenter body{background:var(--bg)}
.console{max-width:1280px;margin:0 auto;padding:16px var(--gutter-r) calc(28px + env(safe-area-inset-bottom, 0px)) var(--gutter-l);display:grid;gap:16px}
.pc-top{display:grid;grid-template-columns:repeat(6,minmax(0,1fr)) auto;gap:10px;align-items:stretch}
.pc-clock{display:grid;gap:6px;align-content:start;padding:10px 12px;border-radius:8px;background:var(--surface);box-shadow:inset 0 0 0 1px var(--rule)}
.pc-clock span{font:500 10.5px/1.25 var(--f-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3)}
.pc-clock b{font:600 2rem/1 var(--f-num);font-variant-numeric:tabular-nums;color:var(--ink)}
.pc-clock small{font:500 11px/1.2 var(--f-mono);color:var(--ink-3)}
.pc-delta[data-tone="ok"]{background:var(--good-wash)}
.pc-delta[data-tone="ok"] b{color:var(--good-ink)}
.pc-delta[data-tone="warn"]{background:var(--warn-wash)}
.pc-delta[data-tone="warn"] b{color:var(--warn-ink)}
.pc-delta[data-tone="late"]{background:var(--risk-wash)}
.pc-delta[data-tone="late"] b{color:var(--risk)}
.pc-clockbtns{display:grid;gap:6px}
.pc-btn{min-height:44px;padding:0 16px;border-radius:8px;border:1px solid var(--rule-2);background:var(--surface);color:var(--ink);font:700 .92rem/1 var(--f-body);cursor:pointer}
.pc-btn:hover{border-color:var(--accent)}
.pc-btn.primary{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.pc-main{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:16px;align-items:start}
.pc-now{display:grid;gap:14px;padding:20px 22px;border-radius:10px;background:var(--surface);box-shadow:inset 0 0 0 1px var(--rule)}
.pc-level{font:500 11.5px/1.3 var(--f-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3)}
.pc-title{font:500 2rem/1.12 var(--f-display)}
.pc-stop{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font:500 13px/1 var(--f-mono);color:var(--ink-2)}
.pc-stop i{width:9px;height:9px;border-radius:50%;background:var(--rule-2)}
.pc-stop i.on{background:var(--accent)}
.pc-notes{font-size:1.2rem;line-height:1.55;color:var(--ink);padding:14px 18px;background:var(--accent-wash);border-radius:8px;white-space:pre-line}
.pc-next{font-size:1rem;color:var(--ink-2)}
.pc-next b{color:var(--ink)}
.pc-nav{display:grid;grid-template-columns:1fr 2fr;gap:10px}
.pc-nav .pc-btn{min-height:76px;font-size:1.3rem;border-radius:10px}
.pc-tools{display:grid;gap:14px}
.pc-box{display:grid;gap:12px;padding:16px 18px;border-radius:10px;background:var(--surface);box-shadow:inset 0 0 0 1px var(--rule)}
.pc-box h2{font:600 11.5px/1.2 var(--f-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3)}
.pc-cut[data-hot]{box-shadow:inset 0 0 0 2px var(--warn-ink);background:var(--warn-wash)}
.pc-cut[data-hot] h2{color:var(--warn-ink)}
.pc-cutlist{display:grid;gap:4px;padding-left:1.2em;list-style:decimal;font-size:.95rem;line-height:1.4}
.pc-never{font-size:.9rem;font-weight:700;color:var(--ink)}
.pc-jump{display:flex;flex-direction:column;max-height:360px;overflow:auto}
.pc-jump button{flex:none;display:grid;grid-template-columns:30px minmax(0,1fr) 46px 56px;gap:8px;align-items:center;width:100%;min-height:40px;padding:4px 8px;border:0;border-bottom:1px solid var(--rule);background:transparent;color:var(--ink-2);text-align:left;cursor:pointer;font-size:.9rem}
.pc-jump button[aria-current="true"]{background:var(--accent-wash);color:var(--ink);font-weight:700}
.pc-jump button.is-off{opacity:.62}
.pc-jump .jn{font:600 1rem/1 var(--f-num);color:var(--accent)}
.pc-jump .jm,.pc-jump .jt{font:500 11px/1 var(--f-mono);color:var(--ink-3);text-align:right}
.pc-hint{font-size:.82rem;color:var(--ink-3)}
@media (max-width:980px){.pc-top{grid-template-columns:repeat(3,minmax(0,1fr))}.pc-clockbtns{grid-column:1/-1;grid-template-columns:1fr 1fr}.pc-main{grid-template-columns:1fr}}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;transition-delay:0s!important}
  html.is-stage .levelflash.is-on{display:none}
}

/* ---------- forced colours: status keeps a visible edge ---------- */
@media (forced-colors: active){
  .callout,.chg-list li,.pills li,.guards li,.st,.how-btn,.how-p,.build,.ranked li{border:1px solid CanvasText}
  .how-btn[aria-expanded="true"]{outline:2px solid Highlight}
}

/* ---------- print: the reading page, every detail open ---------- */
@media print{
  html.is-stage,html.is-stage body{overflow:visible;height:auto}
  .topbar,.stage-ui,.levelflash,.keymap,.console,.replay,.skip,.swipe-hint,.instruct,.how-btn{display:none!important}
  .beat,.levelband{position:static!important;opacity:1!important;visibility:visible!important;transform:none!important;padding-block:28px!important}
  html.is-stage .read-only{display:block!important}
  [data-sb-phase]{display:block!important}
  [data-sb-at],.show-at-final,.show-at-start{opacity:1!important;visibility:visible!important;transform:none!important}
  .how-p{display:block!important;margin-top:6px}
  .ranked li,.chg-list li,.vs-col,.callout,.qcard,.decide li,.steps li,.tracks li,.map-rows li,.build,.vis-wrap{break-inside:avoid}
  .vis-scroll{overflow:visible}
  .st,.callout,.how-p{-webkit-print-color-adjust:exact;print-color-adjust:exact}
  /* a bare desktop link opens in stage view: un-fix the deck and reset the stage type scale */
  html.is-stage{font-size:16px!important}
  html.is-stage .deck{position:static!important;inset:auto!important;overflow:visible!important}
  /* dark bands print on white (no background graphics by default): dark ink, no fill */
  .is-dark,.foot{--bg:#fff;--surface:#f3f4f0;--surface-2:#e8ebe4;--ink:#1b1f1c;--ink-2:#3a403c;--ink-3:#5a615c;--rule:#c9d0c6;--rule-2:#9aa59a;--accent:#21694a;--accent-wash:#e1f3e9;--on-accent:#fff;--muted-mark:#8a948a;--band-ink:#1b1f1c;--band-ink-2:#3a403c;--band-accent:#21694a;--band-rule:#c9d0c6;--warn-wash:#fff0d6;--warn-ink:#6b4a10;--good-wash:#d9f5e7;--good-ink:#17583c;background:#fff!important;color:#1b1f1c!important}
  .foot a,.foot .about summary{color:#21694a!important}
  .foot .wordmark{color:#1b1f1c!important}
}