:root{color-scheme:dark;--bg:#0c111b;--panel:#121b28;--line:#263445;--text:#ecf2f7;--muted:#a8b6c8;--teal:#6ee7c0;--purple:#bb9bff}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:105px}body{margin:0;background:var(--bg);color:var(--text);font:17px/1.65 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,select,input{font:inherit}button,select{border:1px solid var(--line);background:#172230;color:var(--text);border-radius:8px;padding:10px 16px}button{cursor:pointer;transition:background .2s,transform .2s}button:hover{background:#263b4a;transform:translateY(-1px)}button:disabled{opacity:.4;cursor:default;transform:none}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--teal);outline-offset:4px}a{color:var(--teal)}header{height:80px;position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;padding:0 36px;border-bottom:1px solid 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.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}

.explanation{margin-top:32px;padding:26px 28px;border:1px solid var(--line);border-radius:12px;background:linear-gradient(115deg,#6ee7c006,transparent 65%)}.explanation>h3{font-size:24px;margin-top:12px}.explanation p{max-width:90ch;font-size:17px}.explanation details p{font-size:16px}.explanation .two{gap:28px}.teaching-question{margin-top:24px;border-left:3px solid var(--teal);padding:16px 22px;background:#6ee7c007}.teaching-question>strong{color:var(--teal);font-size:13px;letter-spacing:.5px}.teaching-question p{margin:10px 0}.concept-flow{display:flex;align-items:center;gap:16px;margin:22px 0;flex-wrap:wrap}.concept-flow>span{flex:1;min-width:160px;border:1px solid var(--line);border-radius:8px;padding:14px;color:var(--text)}.concept-flow small{color:var(--muted)}.concept-flow>b{color:var(--teal)}.explain-steps{padding-left:25px;max-width:90ch}.explain-steps li{padding:8px 0 8px 8px;color:var(--muted)}.explain-steps li::marker{color:var(--teal);font-weight:700}.explain-steps strong{color:var(--text)}.explanation dt{font-weight:700;margin-top:20px}.explanation dd{color:var(--muted);margin:6px 0 0}.presentation .explanation p,.presentation .explain-steps li{font-size:19px}@media(max-width:760px){.explanation{padding:20px}.concept-flow{flex-direction:column;align-items:stretch}.concept-flow>b{transform:rotate(90deg);align-self:center}.concept-flow>span{min-width:0}.teaching-question{padding:14px 16px}}

/* Explicaciones ampliadas y énfasis visual para la exposición. */
.clarity-panel{margin:32px 0;padding:28px;border:1px solid #365248;border-radius:14px;background:radial-gradient(ellipse at top right,#6ee7c00b,transparent 70%),#111b25}.clarity-panel h3{font-size:25px;max-width:38ch}.clarity-panel p{max-width:90ch;font-size:17px}.clarity-panel strong{color:var(--text)}.reading-path{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:24px 0}.reading-path>div{padding:18px;border:1px solid var(--line);background:#0c141f;border-radius:8px}.reading-path b{color:var(--teal)}.reading-path p{font-size:15px;margin:10px 0 0}.annotated-bits{display:flex;gap:10px;flex-wrap:wrap;margin:24px 0}.annotated-bits>span{display:grid;gap:7px;text-align:center}.annotated-bits b{font:700 30px monospace;display:grid;place-items:center;width:62px;height:65px;background:#203d39;color:var(--teal);border:1px solid #406357;border-radius:8px}.annotated-bits small{font-size:11px;color:var(--muted)}.replacement-slots{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:22px 0}.replacement-slots span{padding:16px 12px;border:1px dashed #486256;border-radius:8px;color:var(--teal);font-size:13px}.replacement-slots span:first-child{border-style:solid;background:#6ee7c008}.replacement-slots strong{display:inline-block;margin-top:6px;font-size:14px}.cross-equation{padding:12px 20px;border-left:3px solid var(--purple);background:#bb9bff06}.cross-equation code{font-size:22px;color:var(--teal);white-space:nowrap}.cross-equation p{font-size:16px}.cross-equation p:nth-child(2){font-size:13px}.case-map{display:grid;grid-template-columns:150px 1fr;gap:0;margin:24px 0}.case-map dt,.case-map dd{border-bottom:1px solid var(--line);padding:14px 0;margin:0;font-size:16px}.case-map dt{color:var(--teal);font-weight:600}.case-map dd{color:var(--muted);padding-left:16px}.step-guide{padding:20px 24px;background:#6ee7c006;border-top:1px solid var(--line)}.step-guide .eyebrow{display:block;margin-bottom:7px;color:var(--teal)}.step-guide strong{font-size:18px}.step-guide p{margin:8px 0 0;font-size:15px;max-width:90ch}.individual{position:relative;transition:border-color .25s,box-shadow .25s,transform .25s}.individual.selected{border-color:var(--teal);box-shadow:0 0 0 1px #6ee7c020,0 0 24px #6ee7c00a}.individual.selected:after{content:'✓ Progenitor';display:block;font-size:11px;color:var(--teal);margin-top:8px}.individual.elite{border-color:#d4b777}.individual.elite small{color:#e2c78f}article,.clarity-panel{transition:border-color .25s,box-shadow .25s}article:hover,.clarity-panel:hover{border-color:#426052;box-shadow:0 8px 30px #00000020}.gene{transition:background .25s,outline-color .25s,transform .25s}.gene:hover{transform:translateY(-4px)}.flash .gene{animation:gene-arrive .45s ease both}.flash .gene:nth-child(2){animation-delay:.04s}.flash .gene:nth-child(4){animation-delay:.08s}.flash .gene:nth-child(5){animation-delay:.12s}.flash .gene:nth-child(6){animation-delay:.16s}.flash .gene:nth-child(7){animation-delay:.2s}.flash .gene.changed{animation:mutation-glow .7s ease both}details[open]>:not(summary){animation:appear .25s ease}.hero-art{box-shadow:0 16px 70px #6ee7c008}.hero-art:hover{transform:rotate(0deg);transition:transform .4s}.stage-track li.active{box-shadow:0 0 16px #6ee7c018}.presentation .clarity-panel p{font-size:20px}.presentation .reading-path p{font-size:17px}@keyframes gene-arrive{from{opacity:.25;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@keyframes mutation-glow{0%{transform:scale(.85);box-shadow:0 0 0 #ffd18a00}50%{transform:scale(1.15);box-shadow:0 0 22px #ffd18a70}100%{transform:scale(1);box-shadow:0 0 0 #ffd18a00}}@media(max-width:760px){.clarity-panel{padding:20px}.clarity-panel h3{font-size:22px}.reading-path{grid-template-columns:1fr}.replacement-slots{grid-template-columns:repeat(2,1fr)}.annotated-bits{gap:7px}.annotated-bits b{width:33px;height:44px;font-size:23px}.case-map{grid-template-columns:1fr}.case-map dt{border-bottom:0;padding-bottom:0}.case-map dd{padding-left:0}.cross-equation{padding:10px 14px}.cross-equation code{font-size:18px}.step-guide{padding:18px}}@media(prefers-reduced-motion:reduce){.gene:hover,.hero-art:hover{transform:none}*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* Presentación por diapositivas: una pantalla activa, contenido conservado. */
.presentation{height:100dvh;overflow:hidden;background:radial-gradient(ellipse at 85% 20%,#1b3c3425,transparent 55%),var(--bg)}.presentation header{height:72px}.presentation .layout{height:calc(100dvh - 142px);max-width:1600px;width:100%}.presentation main{height:100%;padding:0 5vw;position:relative;isolation:isolate}.presentation section{height:100%;min-height:0;overflow-y:auto;overflow-x:hidden;padding:32px 6px 40px;scrollbar-width:thin;scrollbar-color:#426052 transparent;overscroll-behavior:contain}.presentation section.current{display:block;animation:none}.presentation .section-top{margin-bottom:24px}.presentation .hero{margin-bottom:24px}.presentation .clarity-panel,.presentation .explanation{margin:0;min-height:60%;padding:clamp(22px,3vw,45px)}.presentation .clarity-panel>h3,.presentation .explanation>h3{font-size:clamp(28px,3vw,44px);line-height:1.2;max-width:36ch;margin:20px 0 26px}.presentation section>details[open]{border:1px solid var(--line);border-radius:12px;padding:22px 28px;background:var(--panel)}.presentation section>details[open]>summary{color:var(--teal);font-size:18px}.presentation section>details p{font-size:20px;max-width:90ch}.presentation footer{height:70px}.presentation footer button{font-size:15px;padding:10px 24px}.presentation .progress{height:4px}.presentation #progress-text{font-size:15px;font-variant-numeric:tabular-nums}#slide-curtain{display:none;pointer-events:none;position:fixed;inset:72px 0 70px;z-index:15;overflow:hidden;background:transparent}.presentation.slide-transition #slide-curtain{display:block}.slide-transition #slide-curtain:before{content:'';position:absolute;inset:-80%;background:linear-gradient(110deg,transparent 35%,#6ee7c00a 43%,#6ee7c03a 48%,#d5fff580 50%,#bb9bff30 52%,transparent 60%);animation:cinematic-sweep .85s cubic-bezier(.5,0,.2,1) both}.slide-transition #slide-curtain span{position:absolute;inset:0;background:radial-gradient(ellipse at center,#6ee7c00a,transparent 65%);animation:curtain-flare .85s ease both}.slide-transition main{pointer-events:none}.presentation h1,.presentation h2{text-wrap:balance}@keyframes cinematic-sweep{0%{transform:translateX(calc(var(--slide-direction,1)*-65%)) skewX(-12deg);opacity:0}20%{opacity:1}100%{transform:translateX(calc(var(--slide-direction,1)*65%)) skewX(-12deg);opacity:0}}@keyframes curtain-flare{0%,100%{opacity:0}35%{opacity:1}}@media(min-width:1100px) and (max-height:850px){.presentation section{padding-top:20px}.presentation h1{font-size:44px}.presentation h2{font-size:36px}.presentation .lead{font-size:18px;margin-bottom:18px}.presentation .population{padding:15px 24px;grid-template-columns:repeat(4,minmax(0,1fr))}.presentation .operation{min-height:0;padding:14px 24px}.presentation .step-guide{padding:12px 24px}.presentation .lab-heading{padding:12px 24px}.presentation .lab-controls{padding:12px 24px}.presentation .stage-track{padding:8px 24px}.presentation article{padding:18px}.presentation .hero-art{padding:16px}.presentation .hero{gap:30px}.presentation .section-top{margin-bottom:16px}.presentation .hero .lead{margin-bottom:18px}}@media(max-width:760px){.presentation main{padding:0 18px}.presentation section{padding-top:24px}.presentation footer button{padding:9px 12px;font-size:12px}.presentation section>details p{font-size:17px}.presentation .clarity-panel p,.presentation .explanation p{font-size:18px}.presentation .clarity-panel,.presentation .explanation{padding:20px}.presentation .hero-art{display:none}}@media(prefers-reduced-motion:reduce){#slide-curtain{display:none!important}}