/* ============================================================
   NINJA UPGRADE LAB
   Ficha de laboratorio impresa: papel, tinta y un único acento,
   el fluorescente de marcar. Sin tarjetas, sin sombras, sin degradados.
   ============================================================ */

:root{
  --papel:#F3F2EE;
  --papel-2:#EBE9E3;
  --tinta:#141413;
  --tinta-2:#45443F;
  --gris:#8D8B84;
  --linea:#D6D4CC;
  --marcador:#E4F04E;
  --error:#B5441C;

  --sans:'Schibsted Grotesk',ui-sans-serif,-apple-system,'Segoe UI',sans-serif;
  --mono:'Martian Mono',ui-monospace,'SFMono-Regular',Menlo,monospace;
  color-scheme:light;
}

*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}

body{
  margin:0;min-height:100dvh;
  padding-inline:clamp(20px,5vw,48px);
  background:var(--papel);color:var(--tinta);
  font-family:var(--sans);font-size:17px;line-height:1.55;
  -webkit-font-smoothing:antialiased;
  font-feature-settings:"ss01","tnum" 0;
}
::selection{background:var(--marcador);color:var(--tinta)}

/* ---------------- Cabecera ---------------- */

.cabecera{
  max-width:900px;margin:0 auto;
  display:flex;justify-content:space-between;align-items:baseline;gap:16px;
  padding:22px 0 14px;border-bottom:1.5px solid var(--tinta);
}
.marca{font-weight:600;font-size:15px;letter-spacing:-.01em}
.marca span{
  font-family:var(--mono);font-weight:400;font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;
  border:1px solid var(--tinta);padding:2px 6px 1px;margin-left:6px;vertical-align:2px;
}
.ref{font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;color:var(--gris);text-transform:uppercase}

main{max-width:900px;margin:0 auto;padding-bottom:72px}

/* ---------------- Pantallas ---------------- */

.pantalla{display:none}
.pantalla.activa{display:block;animation:aparece .32s ease-out both}
@keyframes aparece{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}

.hoja{
  display:grid;grid-template-columns:150px minmax(0,1fr);gap:44px;
  padding-top:64px;
}

/* marcas de registro, como en un formulario impreso */
.contenido{position:relative}
.contenido::before,.contenido::after{
  content:'';position:absolute;left:-26px;top:9px;background:var(--tinta);opacity:.55;
}
.contenido::before{width:11px;height:1px;left:-31px;top:14px}
.contenido::after{width:1px;height:11px}

.margen{
  display:flex;flex-direction:column;gap:6px;
  align-self:start;position:sticky;top:28px;
  padding-top:6px;
}
.etq{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--gris)}
.dato{font-family:var(--mono);font-size:13px;letter-spacing:.02em;color:var(--tinta)}
.dato b{font-weight:500}
.dato.secundario{color:var(--gris);font-size:11px;margin-top:10px}
.dato.alerta{color:var(--error)}

/* ---------------- Tipografía ---------------- */

h1,.titular,.pregunta{font-weight:500;margin:0;color:var(--tinta)}

h1{
  font-size:clamp(40px,6.4vw,66px);line-height:1;letter-spacing:-.04em;max-width:12ch;
}
.titular{font-size:clamp(30px,4.4vw,46px);line-height:1.05;letter-spacing:-.035em;max-width:18ch}

mark{
  color:inherit;padding:0 .04em;
  background:linear-gradient(transparent 56%, var(--marcador) 56%, var(--marcador) 90%, transparent 90%);
  -webkit-box-decoration-break:clone;box-decoration-break:clone;
}

.entradilla{font-size:17.5px;line-height:1.6;color:var(--tinta-2);max-width:46ch;margin:22px 0 46px}
.entradilla b{font-weight:600;color:var(--tinta)}

/* ---------------- Formulario ---------------- */

.campo{margin-bottom:26px;max-width:460px}

label{
  display:block;margin-bottom:4px;
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--gris);
}

input[type=text],input[type=email],input[type=tel]{
  width:100%;height:46px;padding:0 3px;
  background:transparent;color:var(--tinta);
  border:0;border-bottom:1.5px solid var(--tinta);border-radius:0;outline:none;
  font-family:var(--sans);font-size:19px;
  transition:background-color .15s ease;
  -webkit-appearance:none;appearance:none;
}
input:focus{background:linear-gradient(transparent 62%, rgba(228,240,78,.55) 62%)}
input.invalido{border-bottom-color:var(--error)}

.tel{display:flex;gap:16px}
.tel input{flex:1;min-width:0}
.prefijo{
  position:relative;flex-shrink:0;width:86px;height:46px;
  display:flex;align-items:center;padding:0 3px;
  border-bottom:1.5px solid var(--tinta);
  font-family:var(--mono);font-size:15px;
}
.prefijo::after{content:'';position:absolute;right:4px;top:20px;border:4px solid transparent;border-top-color:var(--tinta)}
.prefijo:focus-within{background:linear-gradient(transparent 62%, rgba(228,240,78,.55) 62%)}
.prefijo select{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer;font-size:16px}

.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

.error{font-family:var(--mono);font-size:12px;color:var(--error);margin:-6px 0 0}

/* ---------------- Botones ---------------- */

.acciones{display:flex;align-items:center;flex-wrap:wrap;gap:14px 22px;margin-top:36px}

.boton{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:54px;padding:0 30px;cursor:pointer;
  background:var(--tinta);color:var(--papel);
  border:0;border-radius:2px;text-decoration:none;
  font-family:var(--sans);font-size:16px;font-weight:500;letter-spacing:.005em;
  transition:box-shadow .18s ease, transform .18s ease;
}
.boton:hover{box-shadow:5px 5px 0 var(--marcador);transform:translate(-1px,-1px)}
.boton:active{box-shadow:2px 2px 0 var(--marcador);transform:none}
.boton:focus-visible{outline:2px solid var(--tinta);outline-offset:4px}
.boton[disabled]{opacity:.25;cursor:not-allowed;box-shadow:none;transform:none}

.nota{font-family:var(--mono);font-size:11px;color:var(--gris);letter-spacing:.02em}

/* ---------------- Regla (progreso) ---------------- */

.regla{position:relative;margin-top:40px;padding-top:12px}
.regla-escala{display:grid;grid-template-columns:repeat(10,1fr);border-right:1px solid var(--tinta)}
.regla-escala i{
  position:relative;display:block;height:26px;font-style:normal;
  border-left:1px solid var(--tinta);
}
.regla-escala i::before{ /* media marca */
  content:'';position:absolute;left:50%;top:0;width:1px;height:5px;background:var(--linea);
}
.regla-escala i::after{ /* tramo recorrido */
  content:'';position:absolute;left:0;right:0;top:0;height:2px;background:transparent;transition:background .3s ease;
}
.regla-escala i.hecha::after{background:var(--tinta)}
.regla-escala i span{
  position:absolute;left:5px;top:10px;
  font-family:var(--mono);font-size:9.5px;letter-spacing:.02em;color:var(--gris);
}
.regla-escala i.actual span{color:var(--tinta);font-weight:500}
.regla-cursor{
  position:absolute;top:0;left:0;width:0;height:0;
  border-left:5px solid transparent;border-right:5px solid transparent;border-top:7px solid var(--tinta);
  transform:translateX(-5px);transition:left .38s cubic-bezier(.3,.7,.2,1);
}

/* ---------------- Preguntas ---------------- */

#s-pregunta .hoja{padding-top:44px}

.pregunta{
  font-size:clamp(26px,3.5vw,36px);line-height:1.16;letter-spacing:-.025em;max-width:26ch;margin-bottom:32px;
}

.opciones{border-top:1px solid var(--linea)}

.opcion{
  display:grid;grid-template-columns:18px 16px minmax(0,1fr);gap:16px;align-items:start;
  width:100%;padding:18px 8px 18px 4px;text-align:left;cursor:pointer;
  background:transparent;border:0;border-bottom:1px solid var(--linea);border-radius:0;
  font-family:var(--sans);font-size:17px;line-height:1.45;color:var(--tinta-2);
  transition:background-color .12s ease,color .12s ease;
  animation:aparece .3s ease-out both;
}
.opcion:nth-child(2){animation-delay:.03s}
.opcion:nth-child(3){animation-delay:.06s}
.opcion:nth-child(4){animation-delay:.09s}
.opcion:nth-child(5){animation-delay:.12s}
.opcion:nth-child(6){animation-delay:.15s}
.opcion:hover{background:var(--papel-2);color:var(--tinta)}
.opcion:focus-visible{outline:1.5px solid var(--tinta);outline-offset:-1.5px}

.casilla{position:relative;width:18px;height:18px;margin-top:3px;border:1.5px solid var(--tinta)}
/* la ✕ se dibuja un poco torcida y sobresale de la casilla, como hecha a mano */
.casilla::before,.casilla::after{
  content:'';position:absolute;left:-4px;top:6.5px;width:23px;height:2px;background:var(--tinta);
  transform:scaleX(0);transition:transform .16s ease-out;
}
.casilla::before{rotate:43deg}
.casilla::after{rotate:-48deg;transition-delay:.07s}
.opcion.elegida .casilla::before,.opcion.elegida .casilla::after{transform:scaleX(1)}

.letra{font-family:var(--mono);font-size:11px;color:var(--gris);margin-top:4px}

.marcado{
  background-image:linear-gradient(transparent 52%, var(--marcador) 52%, var(--marcador) 92%, transparent 92%);
  background-repeat:no-repeat;background-size:0% 100%;
  -webkit-box-decoration-break:clone;box-decoration-break:clone;
  transition:background-size .38s cubic-bezier(.5,0,.2,1);
}
.opcion.elegida{color:var(--tinta)}
.opcion.elegida .marcado{background-size:100% 100%}

.pie{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-top:26px;min-height:54px}
.atras{
  background:none;border:0;padding:10px 0;cursor:pointer;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.02em;color:var(--gris);
}
.atras:hover{color:var(--tinta)}

/* ---------------- Guardando ---------------- */

.escaner{position:relative;width:min(340px,100%);height:1.5px;background:var(--linea);overflow:hidden;margin:34px 0 22px}
.escaner span{position:absolute;top:0;left:0;width:28%;height:100%;background:var(--tinta);animation:escanea 1.1s ease-in-out infinite alternate}
@keyframes escanea{to{left:72%}}

.noscript{position:fixed;inset:auto 0 0 0;margin:0;padding:14px;text-align:center;background:var(--tinta);color:var(--papel);font-family:var(--mono);font-size:12px}

/* ---------------- Móvil ---------------- */

@media (max-width:720px){
  .hoja{grid-template-columns:minmax(0,1fr);gap:22px;padding-top:36px}
  #s-pregunta .hoja{padding-top:26px}
  .margen{position:static;flex-direction:row;flex-wrap:wrap;align-items:baseline;gap:4px 12px;padding:0 0 10px;border-bottom:1px solid var(--linea)}
  .dato.secundario{margin:0 0 0 auto}
  .contenido::before,.contenido::after{display:none}
  h1{max-width:none}
  .entradilla{margin:18px 0 36px;font-size:17px}
  .opcion{gap:12px;padding:16px 2px;font-size:16px;grid-template-columns:18px 13px minmax(0,1fr)}
  .regla{margin-top:26px}
  .regla-escala i span{left:3px;font-size:8.5px}
  .acciones .boton,.pie .boton{flex:1}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
}