/* Estructura por capítulos, navegación de lectura y componentes de contenido */
:root { --h-header: 56px; --h-chapnav: 46px; --sticky: calc(var(--h-header) + var(--h-chapnav)); }
html { scroll-padding-top: calc(var(--sticky) + 14px); }
.crumb { color: var(--ink-2); font-size: 0.9rem; padding-left: 14px; border-left: 1px solid var(--border-strong); }

/* ---------- Navegación de capítulos ---------- */
.chapnav {
  position: sticky; top: var(--h-header); z-index: 40; height: var(--h-chapnav);
  background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.chapnav .wrap { height: 100%; }
.chapnav ol { list-style: none; display: flex; gap: 4px; margin: 0; padding: 0; height: 100%; align-items: center; overflow-x: auto; scrollbar-width: none; }
.chapnav ol::-webkit-scrollbar { display: none; }
.chapnav a { display: flex; align-items: center; gap: 8px; padding: 5px 12px 5px 6px; border-radius: 999px; text-decoration: none; color: var(--ink-2); font-size: 0.88rem; font-weight: 550; white-space: nowrap; }
.chapnav a b { display: grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: var(--surface-2); border: 1px solid var(--border); font-size: 0.72rem; color: var(--ink-2); }
.chapnav a:hover { background: var(--surface-2); color: var(--ink); }
.chapnav a.on { background: var(--accent-wash); color: var(--accent-ink); }
.chapnav a.on b { background: var(--accent); border-color: var(--accent); color: #fff; }
.progress { position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; }
.progress i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .1s linear; }

/* ---------- Portada ---------- */
.hero { padding: 40px 0 8px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr); gap: 36px; align-items: center; }
.hero-copy .lead { margin-bottom: 20px; }
.hero-cta { display: flex; gap: 10px; flex-wrap: wrap; }
.hero-art { margin: 0; }
.hero-art svg { width: 100%; height: auto; display: block; filter: drop-shadow(0 12px 24px rgba(0, 0, 0, 0.10)); }
.route-title { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-2); margin: 28px 0 10px; font-weight: 650; }
.route { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 10px; counter-reset: r; }
.route a { display: flex; flex-direction: column; gap: 4px; height: 100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); text-decoration: none; color: var(--ink); transition: border-color .15s, transform .15s; }
.route a:hover { border-color: var(--accent); transform: translateY(-2px); }
.route b { font-size: 0.95rem; }
.route small { color: var(--ink-2); font-size: 0.78rem; line-height: 1.35; }
.r-n { display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: var(--accent); color: #fff; font-size: 0.75rem; font-weight: 700; }
.route-note { color: var(--muted); font-size: 0.82rem; margin: 10px 0 0; }

/* ---------- Capítulos ---------- */
.chapter { padding-top: 72px; padding-bottom: 8px; }
:root { --band: color-mix(in srgb, var(--surface-2) 55%, var(--bg)); }
.chapter { margin-top: 0; padding-bottom: 56px; }
/* bandas de fondo a sangre para alternar capítulos y dar ritmo de lectura */
#ch2, #ch4, #ch6 { background: var(--band); box-shadow: 0 0 0 100vmax var(--band); clip-path: inset(0 -100vmax); }
#refs { padding-top: 72px; }
.ch-head { display: flex; gap: 16px; align-items: center; margin-bottom: 22px; }
.ch-num { display: grid; place-items: center; flex: none; width: 50px; height: 50px; border-radius: 15px; background: var(--ink); color: var(--bg); font-weight: 700; font-size: 1.35rem; }
.ch-kicker { margin: 0 0 2px; font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.09em; color: var(--ink-2); font-weight: 650; }
.ch-head h2 { font-size: clamp(1.5rem, 3.2vw, 2.15rem); letter-spacing: -0.03em; }
.ch-goals { padding: 14px 22px; margin-bottom: 26px; border-left: 4px solid var(--accent); }
.takeaways { margin: 34px 0 0; padding: 16px 22px; border-radius: 14px; background: color-mix(in srgb, var(--good) 8%, var(--surface)); border: 1px solid color-mix(in srgb, var(--good) 28%, var(--border)); }
.takeaways h3 { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--good); margin-bottom: 8px; }
.takeaways ul { margin: 0; padding-left: 1.2em; display: grid; gap: 4px; }
.takeaways li { font-size: 0.93rem; }
.ch-goals h3 { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-2); margin-bottom: 8px; }
.ch-goals ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; }
.ch-goals li { position: relative; padding-left: 26px; }
.ch-goals li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--accent-ink); font-weight: 700; }
.sub-head { margin: 8px 0 12px; }
.sub-head h3 { font-size: 1.15rem; }
.sub-head p { color: var(--ink-2); margin: 4px 0 0; }
.opt { font-weight: 500; color: var(--muted); font-size: 0.85rem; }
.sub-title { font-size: 1.3rem; margin: 44px 0 12px; letter-spacing: -0.02em; }
.lead-s { color: var(--ink-2); max-width: 62em; margin: 0 0 16px; }
.fine { color: var(--ink-2); font-size: 0.85rem; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.three-col { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.g-card { padding: 18px 20px; }
.g-card h4 { font-size: 1rem; margin-bottom: 8px; }
.g-card p, .g-card li { color: var(--ink-2); font-size: 0.92rem; }
.g-card ul { margin: 0; padding-left: 1.2em; }
.g-card li { margin-bottom: 4px; }
.steps { padding-left: 1.3em; margin: 0; }
.steps li { margin-bottom: 8px; color: var(--ink); font-size: 0.92rem; }

.term { border-bottom: 1.5px dotted var(--muted); cursor: help; }
.term:hover, .term:focus-visible { border-bottom-color: var(--accent); background: var(--accent-wash); }
.cite { color: var(--accent-ink); text-decoration: none; border-bottom: 1px dotted var(--accent-ink); }
.cite:hover { background: var(--accent-wash); }

.callout { border: 1px solid var(--border); border-left: 4px solid var(--accent); background: var(--accent-wash); border-radius: 12px; padding: 14px 18px; margin: 28px 0; }
.callout h4 { font-size: 1rem; margin-bottom: 6px; }
.callout p { margin: 0; font-size: 0.93rem; }
.callout.warn { border-left-color: var(--s4); background: color-mix(in srgb, var(--s4) 10%, var(--surface)); }

.checks { margin: 34px 0 6px; padding: 16px 20px; border: 1px dashed var(--border-strong); border-radius: 14px; }
.checks h3 { font-size: 0.95rem; display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.chk-i { display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: var(--ink); color: var(--bg); font-size: 0.8rem; font-weight: 700; }
details.check { border-top: 1px solid var(--border); }
details.check:first-of-type { border-top: 0; }
details.check summary { cursor: pointer; font-weight: 600; padding: 10px 0; font-size: 0.93rem; }
details.check .answer { margin: 0 0 12px; padding: 10px 14px; border-left: 3px solid var(--good); background: var(--surface-2); border-radius: 0 10px 10px 0; font-size: 0.92rem; }
.ch-next { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--border); }
.ch-next .btn:only-child { margin-left: auto; }

/* ---------- Capítulo 1 ---------- */
#ch1 .ideas { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 22px; }
.race { padding: 0 0 6px; margin-bottom: 20px; }
.race-head { padding: 18px 22px 8px; }
.race-head h3 { font-size: 1.15rem; }
.race-head p { margin: 4px 0 0; color: var(--ink-2); font-size: 0.92rem; }
.race-body { display: grid; grid-template-columns: minmax(0, 440px) minmax(0, 1fr); gap: 22px; padding: 8px 22px 16px; align-items: start; }
.race-canvas { aspect-ratio: 1; width: 100%; }
#raceCanvas { width: 100%; height: 100%; display: block; border: 1px solid var(--border); border-radius: 12px; cursor: crosshair; touch-action: manipulation; }
.race-side { display: grid; gap: 12px; justify-items: start; }
.race-side .chart { width: 100%; }
.race-side .seg { max-width: 100%; }
.race-btns { display: flex; gap: 8px; flex-wrap: wrap; }
.race-status { margin: 0; padding: 10px 12px; border-radius: 10px; background: var(--accent-wash); font-size: 0.92rem; min-height: 3.2em; }
.race-count { color: var(--ink-2); font-size: 0.88rem; }
.race-side hr { border: 0; border-top: 1px dashed var(--border-strong); margin: 4px 0; width: 100%; }
.race-means { margin: 0; font-size: 0.9rem; }
.dotc { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin: 0 4px 0 2px; vertical-align: 0; }
.formula-card { padding: 20px 24px; margin-bottom: 8px; }
.formula-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.formula-big { font-family: Georgia, "Times New Roman", serif; font-style: italic; font-size: 1.9rem; margin: 6px 0 14px; letter-spacing: 0.01em; }
.score-scale { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; text-align: center; font-size: 0.88rem; margin-bottom: 12px; }
.score-scale span { padding: 10px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface-2); }
.score-scale span:first-child { border-top: 3px solid var(--grid); }
.score-scale span:nth-child(2) { border-top: 3px solid var(--muted); }
.score-scale span:last-child { border-top: 3px solid var(--s2); }
.score-scale small { color: var(--ink-2); }

/* ---------- Capítulo 2 (ajustes del laboratorio dentro del capítulo) ---------- */
#ch2 .lab { margin-top: 22px; }
.lab-controls { top: calc(var(--sticky) + 12px); max-height: calc(100vh - var(--sticky) - 28px); }
.k-ctl { display: inline-flex; align-items: center; gap: 8px; font-size: 0.82rem; font-weight: 500; }
.tg-flex { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.unsup-group { margin-top: 16px; padding-top: 14px; border-top: 1px dashed var(--border-strong); }
.unsup-group .tiles { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.insight { margin-top: 8px; padding: 10px 14px; border-radius: 10px; background: var(--accent-wash); font-size: 0.9rem; min-height: 0; }
.insight:empty { display: none; }

/* ---------- Capítulo 3 ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 14px; background: var(--surface); box-shadow: var(--shadow); }
.ind-table { border-collapse: collapse; width: 100%; font-size: 0.88rem; min-width: 760px; }
.ind-table th { text-align: left; font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-2); padding: 10px 14px; background: var(--surface-2); border-bottom: 1px solid var(--border-strong); }
.ind-table td { padding: 10px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
.ind-table tr:last-child td { border-bottom: 0; }
.ind-table tr.sep td { border-top: 2px solid var(--border-strong); }
/* Tres estados de "¿necesita etiquetas?", cada uno con su color de celda + texto (nunca color solo) */
.ind-legend { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-bottom: 10px; font-size: 0.84rem; color: var(--ink-2); }
.ind-legend i { display: inline-block; width: 13px; height: 13px; border-radius: 4px; margin-right: 7px; vertical-align: -2px; border: 1px solid var(--border-strong); }
.ind-legend .sw-y { background: var(--cell-y); border-color: var(--s4); } .ind-legend .sw-n { background: var(--cell-n); border-color: var(--s3); } .ind-legend .sw-s { background: var(--cell-s); border-color: var(--s1); }
:root { --cell-y: color-mix(in srgb, var(--s4) 26%, var(--surface)); --cell-n: color-mix(in srgb, var(--s3) 24%, var(--surface)); --cell-s: color-mix(in srgb, var(--s1) 22%, var(--surface)); }
.ind-table td.lab-y, .ind-table td.lab-n, .ind-table td.lab-s { white-space: nowrap; text-align: center; }
.ind-table td.lab-y { background: var(--cell-y); box-shadow: inset 3px 0 0 var(--s4); } .ind-table td.lab-n { background: var(--cell-n); box-shadow: inset 3px 0 0 var(--s3); } .ind-table td.lab-s { background: var(--cell-s); box-shadow: inset 3px 0 0 var(--s1); }
.lab-pill { font-weight: 700; font-size: 0.8rem; }
.ind-table td.lab-y .lab-pill::before { content: "● "; } .ind-table td.lab-n .lab-pill::before { content: "○ "; } .ind-table td.lab-s .lab-pill::before { content: "◑ "; }
.jac-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.px-ctl { margin: 4px 0 10px; font-size: 0.88rem; color: var(--ink-2); }
.px-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-bottom: 14px; }
.lg-pair { display: inline-flex; gap: 6px; align-items: center; flex-wrap: wrap; margin-left: 4px; white-space: nowrap; font-size: 0.85rem; }
.lg-pair i { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin: 0 2px 0 8px; }
.lg-pair i.ring { background: none; border: 2px solid var(--ink); }
.lg-diamond { display: inline-block; width: 9px; height: 9px; border: 2px solid var(--s2); transform: rotate(45deg); vertical-align: 0; margin: 0 3px; }

/* ---------- Capítulo 4 ---------- */
.effects { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.eff { padding: 14px 16px; }
.eff b { display: block; margin-bottom: 4px; }
.eff p { margin: 0; color: var(--ink-2); font-size: 0.85rem; }
.methods { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 18px; }
.method { padding: 16px 18px; border-top: 3px solid var(--accent); }
.method h4 { font-size: 1rem; margin-bottom: 6px; }
.method p { margin: 0; color: var(--ink-2); font-size: 0.89rem; }
.gvr { margin-bottom: 8px; }
.ta-ctl { padding: 16px 20px; display: grid; gap: 12px; margin-bottom: 16px; }
.ta-row { display: flex; flex-wrap: wrap; gap: 14px 26px; align-items: flex-end; }
.ta-f { display: grid; gap: 4px; font-size: 0.82rem; color: var(--ink-2); font-weight: 600; }
.ta-f input[type="range"] { min-width: 240px; }
.ta-methods { display: flex; gap: 10px; flex-wrap: wrap; }
.ta-chip { display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px; border: 1px solid var(--border-strong); border-radius: 999px; cursor: pointer; font-size: 0.86rem; font-weight: 550; background: var(--surface); }
.ta-chip input { accent-color: var(--accent); }
.sw { display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin-right: 6px; vertical-align: -1px; }
.ta-chip .sw { margin: 0; }
.ta-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.ta-show { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; font-size: 0.85rem; color: var(--ink-2); margin-bottom: 6px; }
.ta-result { padding: 16px 20px; }
.ta-table { border-collapse: collapse; width: 100%; font-size: 0.88rem; font-variant-numeric: tabular-nums; }
.ta-table th { text-align: left; font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-2); padding: 8px 10px; border-bottom: 1px solid var(--border-strong); }
.ta-table td { padding: 8px 10px; border-bottom: 1px solid var(--border); }
.ta-table tr.ta-ref td { color: var(--ink-2); font-style: italic; }
.muted-n { color: var(--muted); font-style: italic; }
.gainbar { position: relative; height: 22px; min-width: 150px; background: var(--surface-2); border-radius: 6px; overflow: hidden; }
.gainbar i { position: absolute; inset: 0 auto 0 0; background: color-mix(in srgb, var(--s1) 55%, var(--surface)); border-radius: 6px; }
.gainbar b { position: relative; padding-left: 8px; line-height: 22px; font-size: 0.82rem; }
pre.code { margin: 0 0 10px; padding: 14px 16px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px; overflow-x: auto; font-size: 0.78rem; line-height: 1.55; }
pre.code code { background: none; padding: 0; font-size: inherit; }

/* ---------- Capítulo 5 ---------- */
.case-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.case-tabs button { display: flex; flex-direction: column; align-items: flex-start; gap: 0; font: inherit; font-size: 0.9rem; font-weight: 600; padding: 8px 14px; border-radius: 12px; cursor: pointer; background: var(--surface); color: var(--ink-2); border: 1px solid var(--border-strong); text-align: left; }
.case-tabs button small { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.07em; font-weight: 600; color: var(--muted); }
.case-tabs button:hover { color: var(--ink); background: var(--surface-2); }
.case-tabs button[aria-selected="true"] { background: var(--accent-wash); color: var(--accent-ink); border-color: var(--accent); }
.case-body { padding: 22px 26px; }
.case-body header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.case-body h3 { font-size: 1.35rem; }
.case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.case-body h5 { font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-2); margin: 14px 0 4px; }
.case-body h5:first-child { margin-top: 0; }
.case-body p { margin: 0; font-size: 0.93rem; }
.keys { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.keys li { display: grid; grid-template-columns: auto 1fr; gap: 10px; align-items: start; font-size: 0.9rem; }
.keys code { white-space: nowrap; margin-top: 2px; }
.trap { padding: 10px 12px; border-left: 3px solid var(--s4); background: color-mix(in srgb, var(--s4) 9%, var(--surface)); border-radius: 0 10px 10px 0; }
.case-body footer { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--border); }

/* ---------- Bibliografía ---------- */
.refs-card { padding: 18px 26px; }
.refs-list { margin: 0; padding-left: 1.6em; font-size: 0.9rem; }
.refs-list li { margin-bottom: 10px; padding: 4px 8px; border-radius: 8px; color: var(--ink-2); }
.refs-list li:target { background: var(--accent-wash); color: var(--ink); outline: 2px solid var(--accent); }
.refs-list a { word-break: break-word; }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-art { max-width: 420px; }
  .route { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .methods, .three-col { grid-template-columns: repeat(2, 1fr); }
  .effects { grid-template-columns: repeat(3, 1fr); }
  .px-grid { grid-template-columns: 1fr; }
}
@media (max-width: 1040px) {
  .mini-metrics { top: var(--sticky) !important; }
}
@media (max-width: 760px) {
  .route { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .two-col, .three-col, .methods, .jac-row, .ta-grid, .case-grid, .race-body, #ch1 .ideas { grid-template-columns: 1fr; }
  .effects { grid-template-columns: repeat(2, 1fr); }
  .chapter { padding-top: 48px; }
  .chapter + .chapter { margin-top: 40px; }
  .ch-num { width: 42px; height: 42px; font-size: 1.1rem; border-radius: 12px; }
  .crumb { display: none; }
  .chapnav a span { display: none; }
  .chapnav a.on span { display: inline; }
  .chapnav a { padding-right: 8px; }
  .case-body { padding: 18px; }
  .ta-f input[type="range"] { min-width: 180px; }
}

#tuneTable, #taTable, #sweepTable { overflow-x: auto; }
.ta-table { min-width: 560px; }
.chart-card, .card { min-width: 0; }

/* Bloque estándar "Qué NO optimizar" (assets/js/core/tuning-doc.js) */
.nt-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.nt-card { padding: 16px 18px; border-top: 3px solid var(--nt-c); --nt-c: var(--muted); }
.nt-card.nt-fix { --nt-c: var(--s1); } .nt-card.nt-decide { --nt-c: var(--s2); } .nt-card.nt-repro { --nt-c: var(--s3); }
.nt-card header { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 8px; flex-wrap: wrap; }
.nt-card header code { font-size: 0.84rem; font-weight: 650; }
.nt-kind { font-size: 0.68rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; padding: 2px 9px; border-radius: 999px; background: color-mix(in srgb, var(--nt-c) 16%, var(--surface)); color: var(--ink); border: 1px solid color-mix(in srgb, var(--nt-c) 45%, var(--border)); cursor: help; white-space: nowrap; }
.nt-card p { margin: 0; font-size: 0.89rem; color: var(--ink-2); }
.nt-instead { margin-top: 8px !important; padding-top: 8px; border-top: 1px dashed var(--border-strong); color: var(--ink) !important; }
.nt-foot { margin-top: 12px; }
@media (max-width: 1100px) { .nt-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 760px) { .nt-grid { grid-template-columns: 1fr; } }

/* ---------- Componentes compartidos por los capítulos de cualquier laboratorio ---------- */
/* Dos conceptos enfrentados (capítulo "La idea") */
.force-grid { display: grid; grid-template-columns: 1fr auto 1fr; gap: 14px; align-items: center; margin: 14px 0 16px; }
.force { padding: 14px 16px; border-radius: 12px; border: 1px solid var(--border); background: var(--surface-2); }
.force h4 { font-size: 0.98rem; margin-bottom: 6px; }
.force p { margin: 0; font-size: 0.9rem; color: var(--ink-2); }
.force.f-rec { border-top: 3px solid var(--s1); }
.force.f-kl { border-top: 3px solid var(--s2); }
.force.f-vs { border: 0; background: none; font-size: 1.6rem; color: var(--muted); padding: 0 4px; text-align: center; }
.f-tag { display: inline-block; margin-top: 8px; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; font-weight: 700; color: var(--ink-2); }
.f-rec .f-tag { color: var(--accent-ink); }
.f-kl .f-tag { color: var(--s2); }

/* Barra de controles de una cuadrícula/experimento (capítulo "Optimizar") */
.grid-ctl { padding: 14px 18px; display: flex; gap: 14px 20px; align-items: center; flex-wrap: wrap; margin-bottom: 14px; }
.grid-ctl label { font-size: 0.84rem; color: var(--ink-2); font-weight: 600; }
.grid-ctl select { margin-left: 6px; }

/* Pasos numerados del orden de ajuste */
.order-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.os { padding: 16px 18px; position: relative; border-top: 3px solid var(--accent); }
.os-n { position: absolute; top: 12px; right: 16px; font-size: 1.8rem; font-weight: 750; color: var(--surface-2); line-height: 1; }
.os h4 { font-size: 0.98rem; margin-bottom: 6px; }
.os p { margin: 0; font-size: 0.88rem; color: var(--ink-2); }

/* Botonera de entrenamiento por tramos (laboratorios que entrenan en vivo) */
.ep-row { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.train-state { font-size: 0.8rem; color: var(--accent-ink); font-weight: 600; }

@media (max-width: 1100px) { .order-steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 760px) {
  .force-grid { grid-template-columns: 1fr; }
  .force.f-vs { transform: rotate(90deg); padding: 4px 0; }
  .order-steps { grid-template-columns: 1fr; }
}