/* Academic Horizon · adaptación para Coasocia — diseño v0.2
   Implementación aditiva: conserva estilos e interacciones de styles.css.
   Paleta sobria para educación media y criterios de accesibilidad. */
:root{
  --deep:#081630;--deep2:#0d234c;--teal:#006e2d;--mint:#f0fdf4;--cream:#f8f9ff;
  --ink:#0b1c30;--muted:#526173;--stroke:#e2e8f0;--white:#ffffff;--orange:#d97706;--radius:16px;
  --ah-navy:#0d234c;--ah-navy-deep:#081630;--ah-green:#15803d;--ah-green-active:#166534;
  --ah-gold:#d97706;--ah-canvas:#f8f9ff;--ah-surface:#fff;--ah-slate:#f8fafc;
  --ah-line:#e2e8f0;--ah-line-strong:#cbd5e1;--ah-text:#0b1c30;
  --ah-font-display:"Plus Jakarta Sans",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --ah-font-body:"Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --ah-shadow:0 1px 3px rgba(13,35,76,.04),0 1px 2px rgba(13,35,76,.03);
  --ah-shadow-hover:0 12px 24px -6px rgba(13,35,76,.09),0 4px 8px -4px rgba(13,35,76,.04);
  --ah-gutter:max(1.25rem,calc((100vw - 1360px)/2 + 1.5rem));
}
html{scroll-padding-top:98px}
body{background:var(--ah-canvas);color:var(--ah-text);font-family:var(--ah-font-body);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
h1,h2,h3,.brand strong,.button,.small-button,.step-index,.version,.section-kicker,.step-label,.card-number,.mark,.intro-band p,.intro-band span{font-family:var(--ah-font-display)}
h2{font-size:clamp(28px,3vw,40px);font-weight:700;line-height:1.2;letter-spacing:-.025em}
h3{font-weight:650;letter-spacing:-.01em}
::selection{background:#d9e2ff;color:#081630}
a,button,select,input,textarea{ -webkit-tap-highlight-color:transparent}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #62df7d;outline-offset:3px}
.skip{z-index:10000;background:#fff;color:#081630;border:1px solid #cbd5e1;border-radius:8px}
.site-header{
  height:80px;position:sticky;top:0;z-index:100;gap:22px;
  padding-inline:var(--ah-gutter);background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--ah-line);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)
}
.brand{gap:12px;flex-shrink:0}
.brand strong{font-size:24px;letter-spacing:-.04em;font-weight:800;color:var(--ah-navy)}
.brand small{font-size:9px;letter-spacing:.105em;color:#536479;font-weight:700}
.mark{background:var(--ah-navy);width:40px;height:40px;border-radius:12px;transform:none;box-shadow:var(--ah-shadow)}
.mark span{background:#90d9a1}.mark span:nth-child(2){background:#f0be6d}
.site-header nav{gap:7px;align-items:center;flex-wrap:wrap}
.site-header nav a{font-family:var(--ah-font-display);font-size:13px;line-height:20px;font-weight:600;color:#344764;padding:9px 12px;border-radius:8px;transition:background .2s,color .2s}
.site-header nav a:hover,.site-header nav a:focus-visible{color:var(--ah-navy);text-decoration:none;background:#eff4ff}
.version{font-size:10px;white-space:nowrap;font-weight:700;letter-spacing:.09em;background:#f0fdf4;color:#166534;border:1px solid #bbf7d0;border-radius:999px}
.hero{
  padding:88px var(--ah-gutter) 92px;min-height:560px;align-items:center;gap:32px;
  grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);background-color:var(--ah-navy-deep);
  background-image:linear-gradient(105deg,rgba(8,22,48,.98) 0%,rgba(13,35,76,.95) 53%,rgba(8,22,48,.78) 100%),url("assets/imagenes/fondos/portada.jpg");
  background-position:center;background-size:cover;position:relative;isolation:isolate
}
.hero::after{content:"";position:absolute;inset:auto -10% -58% 35%;aspect-ratio:1;border:1px solid rgba(255,255,255,.07);border-radius:50%;pointer-events:none;z-index:-1}
.hero-inner{max-width:650px}
.eyebrow{display:inline-flex;align-items:center;gap:3px;background:rgba(255,255,255,.09);color:#d9e2ff;border:1px solid rgba(255,255,255,.16);border-radius:999px;padding:8px 12px;font-family:var(--ah-font-display);font-size:11px;font-weight:700;letter-spacing:.055em}
.dot{background:#62df7d;width:7px;height:7px}
.hero h1{font-family:var(--ah-font-display);font-size:clamp(42px,4.6vw,66px);line-height:1.09;letter-spacing:-.035em;font-weight:800;margin:28px 0 23px;text-wrap:balance}
.hero h1 em{color:#b3c6f8}
.hero p{font-size:17px;color:#e1e8f3;line-height:1.72;max-width:590px}
.hero-note{font-size:12px;color:#b5c4d7;line-height:1.6;margin-top:25px}
.hero-actions{margin-top:29px}
.button{font-family:var(--ah-font-display);border-radius:8px;font-size:14px;font-weight:650;min-height:47px;padding:12px 22px;transition:transform .18s,background-color .18s,box-shadow .18s,border-color .18s;box-shadow:none}
.button:hover{transform:translateY(-2px);filter:none;box-shadow:var(--ah-shadow-hover)}
.button.primary{background:var(--ah-green);color:#fff}
.button.primary:hover{background:var(--ah-green-active)}
.hero-actions .button.secondary{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.42)}
.hero-actions .button.secondary:hover{background:rgba(255,255,255,.18)}
.button.outline{background:#fff;color:var(--ah-navy);border:1px solid var(--ah-line-strong)}
.button.outline:hover{border-color:var(--ah-navy);background:#f8fafc}
.hero-visual{min-height:375px}
.orbit{border-color:rgba(179,198,248,.3)}
.orbit-two{border-color:rgba(98,223,125,.3)}
.center-circle{width:min(57%,244px);background:linear-gradient(145deg,rgba(20,48,92,.96),rgba(8,22,48,.98));border:1px solid rgba(179,198,248,.44);box-shadow:0 26px 55px rgba(0,0,0,.22)}
.center-circle strong{font-family:var(--ah-font-display);font-size:23px;font-weight:700}
.center-circle span:last-child{color:#d9e2ff}
.orbit-small{color:#a6edb6;font-family:var(--ah-font-display)}
.float-tag{background:#fff;color:var(--ah-navy);border:1px solid rgba(226,232,240,.8);border-radius:9px;box-shadow:0 13px 36px rgba(0,0,0,.18);font-family:var(--ah-font-display);font-weight:650;font-size:12px}
.intro-band{padding:23px var(--ah-gutter);background:#fff;border-bottom:1px solid var(--ah-line);gap:22px}
.intro-band p{font-size:10px;letter-spacing:.09em;font-weight:700;color:#64748b}
.intro-band span{color:var(--ah-navy);background:#eff4ff;border:1px solid #d9e2ff;border-radius:999px;font-size:12px;padding:7px 13px;font-weight:600}
.section{padding:84px var(--ah-gutter)}
.section-lead{gap:30px;margin-bottom:34px}
.section-kicker{color:#166534;font-size:11px;font-weight:700;letter-spacing:.09em}
.section-lead p{color:#536479;line-height:1.75}
.subject{background:#fff;border:1px solid var(--ah-line);border-radius:999px;color:#526173;font-size:12px;font-family:var(--ah-font-display);font-weight:600}
/* El fondo aprovecha la imagen existente en GitHub; las tarjetas mantienen contraste alto. */
.challenge{
  position:relative;
  isolation:isolate;
  background-color:#f7f9fd;
  background-image:
    radial-gradient(ellipse at 4% 8%,rgba(217,226,255,.6),transparent 40%),
    radial-gradient(ellipse at 97% 42%,rgba(211,239,222,.4),transparent 36%),
    linear-gradient(180deg,#f8fafc 0%,#f4f7fd 56%,#f8fafc 100%);
}
.challenge::before{
  content:"";
  position:absolute;inset:0 0 auto;height:650px;
  background-image:
    linear-gradient(100deg,rgba(248,250,252,.74),rgba(248,250,252,.46) 60%,rgba(248,250,252,.27)),
    url("assets/imagenes/fondos/Split-Panel Learning Workspace Banner-2.png");
  background-position:center 38%;background-size:cover;
  opacity:.74;
  -webkit-mask-image:linear-gradient(180deg,#000 0%,rgba(0,0,0,.92) 43%,transparent 100%);
  mask-image:linear-gradient(180deg,#000 0%,rgba(0,0,0,.92) 43%,transparent 100%);
  pointer-events:none;z-index:-1;
}
.challenge-banner{
  height:clamp(145px,15vw,205px);
  margin:0 0 24px;
  position:relative;
  overflow:hidden;
  border-radius:16px;
  border:1px solid #dce5f2;
  box-shadow:0 12px 28px rgba(13,35,76,.09);
  background-color:#e5eeff;
  background-image:
    linear-gradient(100deg,rgba(13,35,76,.12),transparent 48%,rgba(13,35,76,.16)),
    url("assets/imagenes/fondos/Split-Panel Learning Workspace Banner-2.png");
  background-size:cover;
  background-position:center 57%;
}
.challenge-banner::after{
  content:"";position:absolute;inset:0;
  border-top:3px solid rgba(13,35,76,.11);
  background:linear-gradient(90deg,rgba(13,35,76,.1),transparent 52%,rgba(255,255,255,.12));
  pointer-events:none;
}
.scenario{background:#eff4ff;border:1px solid #d9e2ff;border-left:4px solid #4b5e8a;border-radius:12px;padding:26px 28px;gap:18px;box-shadow:var(--ah-shadow)}
.scenario-icon{border-radius:10px;background:#d9e2ff;color:var(--ah-navy);font-family:var(--ah-font-display)}
.scenario p{color:#394a60}
.steps{border:1px solid var(--ah-line);border-radius:16px;background:#fff;box-shadow:var(--ah-shadow)}
.step{padding:39px 38px;gap:23px;border-color:var(--ah-line)}
.step-index{background:#eff4ff;color:var(--ah-navy);border-radius:12px;font-size:15px;font-weight:800}
.step-label{color:#166534;font-size:11px;letter-spacing:.07em}
.step h3{font-family:var(--ah-font-display);color:var(--ah-navy);font-size:clamp(19px,1.8vw,22px)}
.step-body>p{color:#526173}
.quiz{gap:10px}
.quiz label{border:1px solid var(--ah-line-strong);background:#fff;border-radius:9px;padding:14px 16px;color:#263b52;transition:background .18s,border-color .18s,box-shadow .18s}
.quiz label:hover{background:#f8fafc;border-color:#8aa4d1}
.quiz label:has(input:checked){border-color:#15803d;background:#f0fdf4;box-shadow:inset 3px 0 0 #15803d}
.quiz input{accent-color:#15803d}
.small-button{background:var(--ah-navy);color:#fff;border-radius:8px;min-height:43px;padding:10px 17px;font-family:var(--ah-font-display);font-size:13px;font-weight:650;transition:background .18s,transform .18s}
.small-button:hover{background:#1b3b73;transform:translateY(-1px)}
.feedback{color:#92400e}.feedback.success{color:#166534}
.data-table-wrap table{background:#fff;color:#0b1c30}
.data-table-wrap th,.data-table-wrap td{border:1px solid var(--ah-line);padding:11px 13px}
.data-table-wrap th{background:#eff4ff;color:#0d234c}
.data-table-wrap caption{color:#526173}
.fields label{color:#263b52;font-weight:600}
.fields textarea{border:1px solid var(--ah-line-strong);background:#fff;color:#0b1c30;border-radius:10px;font-family:var(--ah-font-body);line-height:1.6}
.fields textarea:focus{border-color:#15803d;box-shadow:0 0 0 3px rgba(22,163,74,.13);outline:none}
.fields textarea::placeholder{color:#758394}
.rubric-row{border:1px solid var(--ah-line);background:#fff;border-radius:9px}
.rubric-row label{font-family:var(--ah-font-display);color:#263b52;font-weight:600}
.rubric-row select{font-family:var(--ah-font-body);border-color:var(--ah-line-strong);color:#0d234c;border-radius:8px}
.rubric-row select:focus-visible{outline:3px solid rgba(22,163,74,.3)}
.privacy-note{color:#64748b}
.teacher-section{
  background-color:#eff4ff;
  background-image:linear-gradient(rgba(239,244,255,.93),rgba(239,244,255,.97)),url("assets/imagenes/fondos/docentes.jpg"),url("assets/imagenes/fondos/Dual Educational Study and Teaching Scenes-1.png");
  background-position:center;background-size:cover
}
.teacher-grid{gap:18px}
.teacher-grid article{border:1px solid var(--ah-line);border-radius:14px;background:rgba(255,255,255,.97);padding:29px;box-shadow:var(--ah-shadow);transition:transform .2s,box-shadow .2s,border-color .2s}
.teacher-grid article:hover{transform:translateY(-3px);box-shadow:var(--ah-shadow-hover);border-color:#cbd5e1}
.card-number{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;background:#f0fdf4;border:1px solid #bbf7d0;border-radius:10px;color:#166534;font-weight:700;margin-bottom:18px}
.teacher-grid h3{font-size:19px;color:var(--ah-navy)}
.teacher-grid p{color:#526173;line-height:1.72}
.monitor{background:#e9f0fc;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:52px}
.monitor-content>p,.monitor li{color:#394a60}
.monitor-card{background:linear-gradient(155deg,#0d234c,#081630);border:1px solid rgba(179,198,248,.18);border-radius:16px;box-shadow:0 18px 40px rgba(13,35,76,.11)}
.monitor-card>span{color:#b3c6f8}
.status-item{color:#eaf1ff}
.status-item span{color:#93e5aa}
.status-foot{color:#c1d1e9}
footer{background:#081630;color:#d2dcec;padding:28px var(--ah-gutter);border-top:3px solid #1b3b73}
footer strong{font-family:var(--ah-font-display)}
@media(max-width:1050px){
  .site-header{padding-inline:24px}
  .site-header nav a{padding:8px 9px}
  .hero{padding:70px 24px 75px}
  .section{padding:72px 24px}
  .intro-band{padding-inline:24px}
  footer{padding-inline:24px}
}
@media(max-width:950px){
  .hero{grid-template-columns:1fr}
  .hero-visual{min-height:365px}
  .teacher-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .teacher-grid article{padding:23px}
  .monitor{grid-template-columns:1fr}
}
@media(max-width:700px){
  html{scroll-padding-top:135px}
  .site-header{position:relative;height:auto;padding:15px 20px;align-items:flex-start;flex-direction:column;gap:14px}
  .site-header nav{width:100%;gap:5px}
  .site-header nav a{font-size:12px;padding:8px 10px;background:#f8fafc}
  .hero{padding:58px 20px 45px;min-height:auto}
  .hero h1{font-size:clamp(36px,9vw,46px);letter-spacing:-.025em}
  .hero p{font-size:16px}
  .hero-visual{min-height:320px}
  .intro-band{padding:22px 20px}
  .section{padding:59px 20px}
  .step{padding:25px 19px;gap:13px}
  .step-index{flex:0 0 38px;height:38px;width:38px}
  .teacher-grid{grid-template-columns:1fr}
  .monitor{gap:22px}
  .scenario{padding:20px}
  .rubric-row{grid-template-columns:1fr}
  .button{width:100%}
  footer{padding:24px 20px}
}
@media(max-width:380px){
  .hero-visual{min-height:270px}
  .float-tag{font-size:10px;padding:7px}
  .center-circle{width:50%}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .button,.small-button,.teacher-grid article,.quiz label,.site-header nav a{transition:none!important}
  .button:hover,.small-button:hover,.teacher-grid article:hover{transform:none}
}
@media print{
  body{background:#fff;color:#000;font-family:Arial,sans-serif;font-size:12px}
  .site-header,.hero-visual,.hero-actions,.intro-band,.teacher-section,.monitor,footer,.small-button,.actions,.quiz,.feedback,.hero-note{display:none!important}
  .hero,.challenge{background:#fff!important;color:#000!important;box-shadow:none!important}
  .hero{padding:10px 0;min-height:auto}
  .hero h1{font-size:28px;color:#000}
  .hero h1 em,.eyebrow,.hero p,.section-kicker,.step-label{color:#000!important}
  .eyebrow{border:0;background:#fff;padding:0}
  .section{padding:5px 0}
  .scenario{background:#fff!important;border:1px solid #aaa}
  .steps{border:0;box-shadow:none}
  .step{break-inside:avoid;padding:13px 0}
  .step-index{background:#fff;border:1px solid #999;color:#000}
  .step h3{font-size:17px;color:#000}
  .data-table-wrap th{background:#eee!important}
  .fields textarea{min-height:65px}
}

/* Fondos con adaptación para pantallas pequeñas e impresión. */
@media(max-width:700px){
  .challenge::before{height:465px;opacity:.55;background-position:center top}
  .challenge-banner{height:132px;margin-bottom:18px;border-radius:12px;background-position:center 55%}
}
@media print{
  .challenge-banner,.challenge::before{display:none!important}
}

/* Selector de recorridos sobre la imagen existente del reto. */
.access-banner{
  min-height:350px;height:auto;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:17px;padding:30px clamp(18px,3.7vw,55px);isolation:isolate;
  background-position:center 57%;text-align:center;
}
.access-banner::before{
  content:"";position:absolute;inset:0;z-index:0;
  background:linear-gradient(96deg,rgba(8,22,48,.68),rgba(13,35,76,.56) 50%,rgba(8,22,48,.68));
  pointer-events:none;
}
.access-banner::after{z-index:1;background:linear-gradient(90deg,rgba(8,22,48,.12),transparent 50%,rgba(8,22,48,.12))}
.access-banner > *{position:relative;z-index:2}
.access-intro{color:#fff}
.access-eyebrow{
  font-family:var(--ah-font-display);font-weight:700;font-size:11px;letter-spacing:.11em;
  color:#c7f4d4;text-transform:uppercase
}
.access-intro h3{
  margin:7px 0 4px;font-family:var(--ah-font-display);font-size:clamp(23px,2.6vw,33px);
  font-weight:800;line-height:1.18;letter-spacing:-.025em;color:#fff
}
.access-intro p{margin:0;color:#eaf1ff;font-size:14px;line-height:1.5}
.access-choices{width:min(100%,835px);display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;text-align:left}
.access-card{
  display:flex;align-items:center;gap:15px;min-width:0;min-height:88px;padding:17px 19px;
  text-decoration:none;color:#081630;background:rgba(255,255,255,.97);
  border:1px solid rgba(255,255,255,.7);border-radius:13px;box-shadow:0 13px 26px rgba(8,22,48,.22);
  transition:transform .18s,box-shadow .18s,border-color .18s
}
.access-card:hover,.access-card:focus-visible{
  transform:translateY(-3px);border-color:#62df7d;box-shadow:0 19px 30px rgba(8,22,48,.27);
  text-decoration:none
}
.access-card:focus-visible{outline:3px solid #62df7d;outline-offset:3px}
.access-card-mark{
  display:grid;place-items:center;flex:0 0 45px;width:45px;height:45px;
  background:#f0fdf4;border:1px solid #bbf7d0;color:#166534;border-radius:11px;
  font:800 14px var(--ah-font-display)
}
.access-teacher .access-card-mark{color:#0d234c;background:#eff4ff;border-color:#d9e2ff}
.access-card-copy{display:flex;flex-direction:column;gap:3px;flex:1;min-width:0}
.access-card-copy strong{font:750 17px/1.3 var(--ah-font-display);letter-spacing:-.02em}
.access-card-copy span{font:400 12px/1.45 var(--ah-font-body);color:#526173}
.access-arrow{font-size:23px;color:#166534;line-height:1;flex-shrink:0}
.access-teacher .access-arrow{color:#0d234c}
.access-note{max-width:880px;margin:0;color:#f1f5ff;font-size:11px;line-height:1.55;text-shadow:0 1px 4px rgba(8,22,48,.48)}
@media(max-width:700px){
  .access-banner{min-height:auto;padding:30px 19px;gap:15px}
  .access-choices{grid-template-columns:1fr;gap:10px}
  .access-card{min-height:76px;padding:13px 15px}
  .access-intro p{font-size:13px}
  .access-note{font-size:10.5px}
}
@media(prefers-reduced-motion:reduce){.access-card{transition:none}.access-card:hover{transform:none}}
@media print{.access-banner{display:none!important}}

/* Coasocia: tarjetas de actividades con identidad visual interior v0.3 */
/* El fondo con fotografías antes quedaba oculto detrás del gran panel blanco. */
.steps{
  background:#f6f8fc;
  border-color:#d5e1f0;
  box-shadow:0 9px 30px rgba(13,35,76,.06);
}
.step{
  position:relative;
  overflow:hidden;
  isolation:isolate;
  border-bottom-color:#d5e1f0;
  border-left:4px solid transparent;
  padding-left:34px;
}
#paso-1{
  background:linear-gradient(112deg,#fff 0%,#f4f7ff 75%,#edf4fe 100%);
  border-left-color:#647da8;
}
#paso-2{
  background:linear-gradient(112deg,#f4f8fd 0%,#eef4fc 73%,#e6eef8 100%);
  border-left-color:#2b5975;
}
#paso-3{
  background:linear-gradient(112deg,#fff 0%,#f3f8f5 77%,#e8f4ee 100%);
  border-left-color:#3c8a63;
}
#paso-4{
  background:linear-gradient(112deg,#f0f5ff 0%,#f5f8fe 70%,#fff 100%);
  border-left-color:#7185bb;
}
.step-index{
  box-shadow:0 2px 7px rgba(13,35,76,.07);
  border:1px solid rgba(179,198,248,.4);
}
.step-label{letter-spacing:.075em}
#paso-1 .step-label{color:#334670}
#paso-2 .step-label{color:#255d79}
#paso-3 .step-label{color:#166534}
#paso-4 .step-label{color:#334670}
.quiz label{background:rgba(255,255,255,.94)}
.quiz label:has(input:checked){background:#f0fdf4}
.data-table-wrap{position:relative}
.data-table-wrap table{
  box-shadow:0 3px 15px rgba(13,35,76,.035);
}
.fields textarea{
  background:rgba(255,255,255,.96);
  box-shadow:0 1px 3px rgba(13,35,76,.035);
}
.rubric-row{
  background:rgba(255,255,255,.94);
  box-shadow:0 1px 2px rgba(13,35,76,.025)
}
/* La ilustración ocupa el espacio vacío a la derecha de los datos, sin cubrir ejercicios. */
@media(min-width:1220px){
  #paso-2 .step-body{position:relative}
  #paso-2 .step-body::after{
    content:"";
    position:absolute;
    top:138px;
    right:0;
    width:31%;
    height:245px;
    border:1px solid rgba(197,211,230,.7);
    border-radius:14px;
    box-shadow:0 12px 30px rgba(13,35,76,.08);
    background-image:
      linear-gradient(180deg,rgba(247,250,255,.07),rgba(13,35,76,.11)),
      url("assets/imagenes/fondos/Split-Panel Learning Workspace Banner-2.png");
    background-size:cover;
    background-position:right center;
    pointer-events:none;
    opacity:.78;
  }
}
@media(max-width:700px){
  .step{padding-left:16px;border-left-width:3px}
  #paso-2 .step-body::after{display:none}
}
/* La ficha impresa debe permanecer sobre blanco y evitar imágenes decorativas. */
@media print{
  .steps,.step,#paso-1,#paso-2,#paso-3,#paso-4{
    background:#fff!important;
    border-left:0!important;
    box-shadow:none!important;
  }
  #paso-2 .step-body::after{display:none!important}
}


/* Coasocia: fondos fotográficos de apoyo para actividades 03 y 04 · v0.4
   Fotografías existentes en el repositorio, preservando el contraste del formulario. */
#paso-3{
  background-color:#f3f8f5;
  background-image:
    linear-gradient(105deg,rgba(250,253,251,.93) 0%,rgba(245,250,247,.89) 43%,rgba(241,249,245,.73) 100%),
    url("assets/imagenes/fondos/Dual Educational Study and Teaching Scenes-1.png");
  background-position:center,center 48%;
  background-size:cover;
  background-repeat:no-repeat;
}
#paso-4{
  background-color:#eff4fd;
  background-image:
    linear-gradient(105deg,rgba(247,250,255,.94) 0%,rgba(244,248,255,.87) 50%,rgba(231,241,252,.71) 100%),
    url("assets/imagenes/fondos/Split-Panel Learning Workspace Banner-2.png");
  background-position:center,center 60%;
  background-size:cover;
  background-repeat:no-repeat;
}
#paso-3 .fields textarea,
#paso-4 .rubric-row{
  background:rgba(255,255,255,.97);
  border-color:#cbd8e7;
  box-shadow:0 2px 8px rgba(13,35,76,.045);
}
#paso-3 .step-index{background:#e7f5ec;color:#166534;border-color:#c8ead4}
#paso-4 .step-index{background:#e5edff;color:#334670;border-color:#cfdefc}
@media(max-width:700px){
  #paso-3{
    background-image:
      linear-gradient(90deg,rgba(250,253,251,.92),rgba(247,252,249,.82)),
      url("assets/imagenes/fondos/Dual Educational Study and Teaching Scenes-1.png");
    background-position:center,right center;
  }
  #paso-4{
    background-image:
      linear-gradient(90deg,rgba(247,250,255,.93),rgba(237,245,255,.83)),
      url("assets/imagenes/fondos/Split-Panel Learning Workspace Banner-2.png");
    background-position:center,right center;
  }
}
@media print{
  #paso-3,#paso-4{background:#fff!important}
  #paso-3 .fields textarea,#paso-4 .rubric-row{background:#fff!important;box-shadow:none!important}
}


/* Actividad 02: fotografía como fondo completo y no como tarjeta lateral · v0.5 */
#paso-2{
  background-color:#eef4fc;
  background-image:
    linear-gradient(105deg,rgba(246,249,255,.94) 0%,rgba(244,248,253,.90) 55%,rgba(233,243,252,.76) 100%),
    url("assets/imagenes/fondos/Split-Panel Learning Workspace Banner-2.png");
  background-size:cover;
  background-position:center,right center;
  background-repeat:no-repeat;
}
#paso-2 .step-body::after{display:none!important}
#paso-2 .data-table-wrap table{background:rgba(255,255,255,.97)}
#paso-2 .quiz label{background:rgba(255,255,255,.96)}
@media(max-width:700px){
 #paso-2{
  background-image:
   linear-gradient(90deg,rgba(246,249,255,.94),rgba(239,247,255,.88)),
   url("assets/imagenes/fondos/Split-Panel Learning Workspace Banner-2.png");
  background-position:center,right center
 }
}
@media print{#paso-2{background:#fff!important}}


/* Ruleta formativa pública, accesible aun antes de habilitar D1. */
.game-section{background:linear-gradient(120deg,#edf3ff,#f0f8f3);border-block:1px solid #e0e9f4}
.game-grid{display:grid;grid-template-columns:320px minmax(0,1fr);gap:48px;align-items:center;max-width:980px;margin:36px auto 0}
.game-wheel{position:relative;border-radius:50%;width:290px;height:290px;border:10px solid #fff;box-shadow:0 17px 37px rgba(13,35,76,.16);background:conic-gradient(#d9e2ff 0 25%,#bce9cf 25% 50%,#c4d3ec 50% 75%,#f2ead2 75% 100%);transition:transform 1.1s cubic-bezier(.2,.7,.12,1)}
.game-wheel span{position:absolute;color:#0d234c;font:800 11px var(--ah-font-display)}
.game-wheel span:nth-child(1){top:23%;left:51%}
.game-wheel span:nth-child(2){top:55%;right:8%}
.game-wheel span:nth-child(3){bottom:24%;left:17%}
.game-wheel span:nth-child(4){top:25%;left:15%}
.game-panel{background:#fff;border:1px solid #dce6f1;border-radius:16px;padding:30px;box-shadow:0 12px 28px rgba(13,35,76,.055)}
.game-panel h3{color:#0d234c;font-size:23px}.game-panel>p{color:#526173;line-height:1.75}.game-result{padding:16px 20px;margin:18px 0 0;background:#eff4ff;border:1px solid #d9e2ff;border-radius:10px;min-height:78px;color:#263b52!important}
@media(max-width:700px){.game-grid{grid-template-columns:1fr;justify-items:center;gap:24px}.game-wheel{width:245px;height:245px}.game-panel{padding:22px;width:100%}}
@media(prefers-reduced-motion:reduce){.game-wheel{transition:none}}
@media print{.game-section{display:none!important}}