@scope (.amdahl-guide) {

:scope{
  /* Mundo visual del esquema original: tinta marina, teal para lo que la IA acelera, oro para la puerta, sobre blanco. Historia en pasos: una idea, un control, un dibujo por paso. */
  --ink:#1b2a44;
  --ink-soft:#4a5670;
  --paper:#ffffff;
  --paper-2:#f3f5f9;
  --line:#d9dee8;
  --teal:#1f8a7a;
  --teal-soft:#d8efea;
  --gold:#c9a227;
  --gold-soft:#f6ecc7;
  --display:"Fraunces", Georgia, "Times New Roman", serif;
  --body:"Source Sans 3", "Segoe UI", Helvetica, Arial, sans-serif;
  color-scheme: light;
}
*{box-sizing:border-box}
:scope{margin:0;padding:0}
:scope{background:var(--paper);color:var(--ink);font-family:var(--body);font-size:18px;line-height:1.5;-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:var(--display);font-weight:700;line-height:1.15;margin:0;text-wrap:balance;letter-spacing:-0.01em}
h1{font-size:clamp(2.1rem,5.5vw,3.6rem)}
h2{font-size:clamp(1.6rem,3.4vw,2.3rem)}
h3{font-size:1.25rem}
p{margin:0}
.num{font-variant-numeric:tabular-nums}
.wrap{max-width:1000px;margin:0 auto;padding:0 20px}
.prose{max-width:62ch}
.eyebrow{font-size:.8rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--teal)}
.eyebrow.gold{color:var(--gold);filter:brightness(.85)}

header.hero{padding:64px 0 40px;border-bottom:1px solid var(--line)}
header.hero .sub{font-size:1.25rem;color:var(--ink-soft);margin-top:14px;max-width:58ch}
.steps{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px}
.steps a{text-decoration:none;color:var(--ink);background:var(--paper-2);border:1px solid var(--line);border-radius:999px;padding:7px 14px;font-size:.92rem;font-weight:600}
.steps a:hover{border-color:var(--teal);color:var(--teal)}

section{padding:60px 0;border-bottom:1px solid var(--line)}
section .lead{color:var(--ink-soft);margin-top:10px;font-size:1.12rem}
.stack{display:grid;gap:26px}
.two{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:26px;align-items:start}
@media (max-width:760px){.two{grid-template-columns:1fr}}

.panel{background:var(--paper-2);border:1px solid var(--line);border-radius:16px;padding:22px}
.panel.white{background:var(--paper)}
.ctrl{display:grid;gap:8px}
.ctrl label{display:flex;justify-content:space-between;align-items:baseline;font-weight:600;gap:12px}
.ctrl label output{font-family:var(--display);font-size:1.5rem;font-weight:700;color:var(--teal)}
.ctrl label output.gold{color:var(--gold);filter:brightness(.85)}
.ctrl .hint{display:flex;justify-content:space-between;font-size:.85rem;color:var(--ink-soft)}
input[type=range]{width:100%;accent-color:var(--teal);height:32px;margin:0}
input[type=range].gold{accent-color:var(--gold)}
input[type=range]:focus-visible{outline:3px solid var(--teal);outline-offset:3px;border-radius:6px}

.keys{display:flex;flex-wrap:wrap;gap:16px;font-size:.92rem;color:var(--ink-soft);margin-top:14px}
.keys span::before{content:"";display:inline-block;width:14px;height:14px;border-radius:3px;margin-right:7px;vertical-align:-2px;background:var(--k)}

/* blocks grid */
.blocks{display:grid;grid-template-columns:repeat(10,1fr);gap:6px}
.blocks i{aspect-ratio:1;border-radius:4px;background:var(--gold);transition:background .25s}
.blocks i.t{background:var(--teal)}
.blockcap{display:flex;justify-content:space-between;margin-top:12px;font-weight:700}
.blockcap .t{color:var(--teal)} .blockcap .g{color:var(--gold);filter:brightness(.85)}

/* timelines */
.tl{display:grid;gap:14px}
.tlrow{display:grid;grid-template-columns:110px 1fr;gap:12px;align-items:center}
.tlrow .lbl{font-weight:700;text-align:right;line-height:1.2}
.tlrow .lbl small{display:block;font-weight:400;color:var(--ink-soft);font-size:.85rem}
.track{position:relative;height:40px;background:var(--paper-2);border:1px solid var(--line);border-radius:8px;overflow:hidden}
.track .seg{position:absolute;top:0;bottom:0;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.9rem;white-space:nowrap;transition:width .45s ease,left .45s ease}
.track .seg.t{left:0;background:var(--teal)}
.track .seg.g{background:var(--gold)}
.floor{position:relative;height:0}
.floor .line{position:absolute;top:-8px;bottom:-8px;border-left:3px dashed var(--ink);transition:left .45s ease}
.floor .tag{position:absolute;top:-34px;transform:translateX(-50%);font-size:.8rem;font-weight:700;background:var(--ink);color:#fff;padding:3px 8px;border-radius:999px;white-space:nowrap;transition:left .45s ease}
.saved{display:flex;align-items:center;gap:14px;margin-top:8px}
.saved .big{font-family:var(--display);font-size:2.6rem;font-weight:700;color:var(--teal);line-height:1}
.saved .k{color:var(--ink-soft)}

.callout{border-left:5px solid var(--gold);background:var(--gold-soft);padding:16px 20px;border-radius:0 12px 12px 0;font-size:1.05rem}
.callout.teal{border-color:var(--teal);background:var(--teal-soft)}
.callout b{font-family:var(--display);font-size:1.15rem}

/* cost box + expansion */
.costrow{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.costbox{display:flex;align-items:center;justify-content:center;background:var(--ink);color:#fff;border-radius:10px;font-weight:700;text-align:center;line-height:1.2;transition:width .45s ease,height .45s ease,font-size .45s ease}
.arrow{font-size:2rem;color:var(--teal)}
.grid100{display:grid;grid-template-columns:repeat(20,1fr);gap:4px;margin-top:16px}
.grid100 i{aspect-ratio:1;border-radius:2px;background:var(--line);transition:background .3s}
.grid100 i.on{background:var(--ink)}
.choice{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.choice button{font:inherit;font-weight:700;font-size:1rem;background:var(--paper);color:var(--ink);border:2px solid var(--line);border-radius:999px;padding:9px 18px;cursor:pointer}
.choice button[aria-pressed="true"]{background:var(--ink);color:#fff;border-color:var(--ink)}
.choice button:focus-visible{outline:3px solid var(--teal);outline-offset:2px}
.bigline{font-family:var(--display);font-size:1.6rem;margin-top:14px}
.bigline b{color:var(--teal)}

/* simulation */
.simwrap{position:relative;background:var(--paper);border:1px solid var(--line);border-radius:16px;overflow:hidden}
canvas{display:block;width:100%;height:auto}
.simlabel{position:absolute;font-size:.8rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;pointer-events:none}
.simlabel.l1{left:3%;top:7%;color:var(--teal)}
.simlabel.l2{left:52%;top:5%;transform:translateX(-50%);color:var(--gold);filter:brightness(.8);text-align:center}
.simlabel.l3{right:3%;top:7%;color:var(--teal);text-align:right}
.counters{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
@media (max-width:560px){.counters{grid-template-columns:1fr 1fr}}
.tile{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.tile .v{font-family:var(--display);font-size:2.1rem;font-weight:700;line-height:1}
.tile .v.teal{color:var(--teal)} .tile .v.gold{color:var(--gold);filter:brightness(.85)}
.tile .k{font-size:.88rem;color:var(--ink-soft);margin-top:6px}
.btnrow{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.btn{font:inherit;font-weight:700;background:transparent;color:var(--ink);border:1px solid var(--line);border-radius:999px;padding:9px 18px;cursor:pointer}
.btn:focus-visible{outline:3px solid var(--teal);outline-offset:2px}

/* gates */
.gates{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.gate{background:var(--paper);border:2px solid var(--line);border-radius:16px;padding:18px;cursor:pointer;text-align:left;font:inherit;color:var(--ink);transition:border-color .2s}
.gate:hover{border-color:var(--gold)}
.gate[aria-expanded="true"]{border-color:var(--gold);background:var(--gold-soft)}
.gate:focus-visible{outline:3px solid var(--teal);outline-offset:2px}
.gate h3{display:flex;justify-content:space-between;align-items:center}
.gate h3 .chev{font-size:1rem;color:var(--ink-soft);transition:transform .2s}
.gate[aria-expanded="true"] h3 .chev{transform:rotate(90deg)}
.gate .q{color:var(--ink-soft);font-size:.98rem;margin-top:4px}
.gate .more{display:none;margin-top:12px;font-size:.98rem;border-top:1px dashed var(--line);padding-top:10px}
.gate[aria-expanded="true"] .more{display:block}
.mix{display:grid;gap:5px;margin-top:12px;font-size:.82rem;color:var(--ink-soft)}
.mix div{display:grid;grid-template-columns:120px 1fr;align-items:center;gap:8px}
.mix b{height:8px;border-radius:4px;display:block}
.mix b.i{background:var(--ink)} .mix b.g{background:var(--gold)}

/* quiz */
.quiz{display:grid;gap:16px}
.qcard{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:20px}
.qcard .qt{font-weight:700;font-size:1.08rem}
.opts{display:grid;gap:8px;margin-top:12px}
.opt{font:inherit;text-align:left;background:var(--paper-2);border:1px solid var(--line);border-radius:10px;padding:10px 14px;cursor:pointer;color:var(--ink)}
.opt:hover{border-color:var(--ink)}
.opt:focus-visible{outline:3px solid var(--teal);outline-offset:2px}
.opt.ok{border-color:var(--teal);background:var(--teal-soft)}
.opt.ko{border-color:#b94a48;background:#f8e3e2}
.opt[disabled]{cursor:default}
.fb{margin-top:10px;font-size:.98rem;min-height:1.4em;color:var(--ink-soft)}
.score{font-weight:700}

footer{padding:40px 0 60px;color:var(--ink-soft);font-size:.9rem}
footer .end{font-family:var(--display);font-size:1.7rem;color:var(--ink);margin-bottom:14px}
@media (prefers-reduced-motion:reduce){*{transition:none !important}}

.breadcrumb{font:14px/1.5 var(--body);padding-top:24px;color:var(--ink-soft)}
.breadcrumb a{color:inherit;text-underline-offset:3px}
.two>*{min-width:0}.ctrl label{flex-wrap:wrap}.reference-content{max-width:960px;margin:auto}
@media(max-width:560px){
  section{padding:38px 0}.panel{padding:16px}.ctrl .hint{gap:12px}
  .tlrow{grid-template-columns:65px minmax(0,1fr);gap:6px}.tlrow .lbl{font-size:.8rem}
  .track .seg{font-size:.65rem}.floor .tag{font-size:.65rem}
  .costrow{gap:10px}.bigline{font-size:1.25rem}.costbox{flex-shrink:0}
  .simlabel{font-size:.52rem;letter-spacing:0;max-width:38%}.simlabel.l2{top:18%}
}

}
body .amdahl-guide .wrap{max-width:1000px;margin-inline:auto;padding-inline:20px}