/* ==========================================================
   Mide Tu Espacio — sistema visual
   Sala a oscuras (indigo) · cotas de plano (cian) · haz (ámbar)
   ========================================================== */

:root {
  --sala:      #0E1220;
  --sala-alta: #161C31;
  --panel:     #1C2340;
  --borde:     #2A3358;
  --tinta:     #E9ECF7;
  --tenue:     #8F97B5;
  --cota:      #5BC8D8;
  --haz:       #F2B45C;
  --alerta:    #E0685A;
  --ok:        #6FD08C;

  --display: "Bricolage Grotesque", Georgia, serif;
  --texto:   "IBM Plex Sans", system-ui, sans-serif;
  --dato:    "IBM Plex Mono", ui-monospace, monospace;

  --ancho: 1180px;
  --radio: 4px;
  --paso: clamp(3.5rem, 8vw, 7rem);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
  margin: 0;
  background: var(--sala);
  color: var(--tinta);
  font-family: var(--texto);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* Retícula de plano, muy tenue, sobre el fondo */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(91,200,216,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91,200,216,.045) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
}

.envoltura { position: relative; z-index: 1; }
.contenedor { width: min(100% - 2.5rem, var(--ancho)); margin-inline: auto; }

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

h1, h2, h3 {
  font-family: var(--display);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -.022em;
  margin: 0 0 .6em;
  text-wrap: balance;
}
h1 { font-size: clamp(2.5rem, 6.2vw, 4.4rem); font-weight: 800; }
h2 { font-size: clamp(1.85rem, 3.6vw, 2.7rem); }
h3 { font-size: 1.22rem; letter-spacing: -.01em; }
p  { margin: 0 0 1.1em; }
a  { color: var(--cota); }

.rotulo {
  font-family: var(--dato);
  font-size: .715rem;
  letter-spacing: .17em;
  text-transform: uppercase;
  color: var(--cota);
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: 1.4rem;
}
.rotulo::after {
  content: "";
  height: 1px;
  flex: 1;
  max-width: 90px;
  background: linear-gradient(90deg, var(--cota), transparent);
}
.entradilla { font-size: 1.16rem; color: var(--tenue); max-width: 56ch; }
.dato { font-family: var(--dato); font-variant-numeric: tabular-nums; }

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

.cabecera {
  position: sticky; top: 0; z-index: 40;
  background: rgba(14,18,32,.86);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--borde);
}
.cabecera .contenedor {
  display: flex; align-items: center; justify-content: space-between;
  padding: .9rem 0;
}
.marca {
  font-family: var(--display); font-weight: 800; font-size: 1.12rem;
  letter-spacing: -.02em; color: var(--tinta); text-decoration: none;
  display: flex; align-items: center; gap: .6rem;
}
.marca svg { flex: none; }
.menu { display: flex; align-items: center; gap: 1.6rem; }
.menu a {
  color: var(--tenue); text-decoration: none; font-size: .93rem;
  transition: color .18s;
}
.menu a:hover { color: var(--tinta); }

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

.boton {
  display: inline-flex; align-items: center; gap: .6rem;
  font-family: var(--dato); font-size: .85rem; font-weight: 500;
  letter-spacing: .04em;
  padding: .85rem 1.5rem;
  border-radius: var(--radio);
  border: 1px solid transparent;
  text-decoration: none; cursor: pointer;
  transition: transform .16s, background .18s, border-color .18s;
}
.boton-haz { background: var(--haz); color: #1A1305; font-weight: 600; }
.boton-haz:hover { transform: translateY(-2px); background: #FFC672; }
.boton-linea { border-color: var(--borde); color: var(--tinta); background: transparent; }
.boton-linea:hover { border-color: var(--cota); color: var(--cota); }

:focus-visible { outline: 2px solid var(--haz); outline-offset: 3px; }

/* ---------- Portada ---------- */

.portada { padding: clamp(3rem, 7vw, 5.5rem) 0 var(--paso); }
.portada .contenedor {
  display: grid; grid-template-columns: 1fr 1.05fr;
  gap: clamp(2rem, 5vw, 4.5rem); align-items: center;
}
.portada h1 span { color: var(--haz); }
.portada .acciones { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 2rem; }

.marco-plano {
  background: var(--sala-alta);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  padding: 1.1rem;
  position: relative;
}
.marco-plano::before {
  content: "PLANTA · 1:50";
  position: absolute; top: -.62rem; left: 1.1rem;
  background: var(--sala-alta);
  padding: 0 .55rem;
  font-family: var(--dato); font-size: .66rem; letter-spacing: .14em;
  color: var(--cota);
}
.marco-plano svg { width: 100%; height: auto; display: block; }

/* Animación de trazado de cotas */
.traza { stroke-dasharray: 600; stroke-dashoffset: 600; animation: trazar 1.5s ease forwards; }
@keyframes trazar { to { stroke-dashoffset: 0; } }

/* ---------- Secciones ---------- */

section { padding-block: var(--paso); }
.linea-arriba { border-top: 1px solid var(--borde); }

.rejilla-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.6rem; }
.rejilla-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.6rem; }

.paso-tarjeta {
  border-left: 2px solid var(--borde);
  padding: .2rem 0 .2rem 1.5rem;
  position: relative;
}
.paso-tarjeta .indice {
  font-family: var(--dato); font-size: .78rem; color: var(--haz);
  letter-spacing: .1em; display: block; margin-bottom: .7rem;
}
.paso-tarjeta p { color: var(--tenue); margin: 0; font-size: .97rem; }

.ficha {
  background: var(--sala-alta);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  padding: 1.6rem;
  transition: border-color .2s, transform .2s;
}
.ficha:hover { border-color: var(--cota); transform: translateY(-3px); }
.ficha h3 { margin-bottom: .5rem; }
.ficha p { color: var(--tenue); font-size: .95rem; margin: 0; }
.ficha .unidad {
  font-family: var(--dato); font-size: .7rem; color: var(--cota);
  letter-spacing: .12em; display: block; margin-bottom: .8rem;
}

.aviso-honesto {
  background: linear-gradient(140deg, rgba(224,104,90,.09), transparent 65%);
  border: 1px solid rgba(224,104,90,.32);
  border-radius: var(--radio);
  padding: clamp(1.8rem, 4vw, 3rem);
}
.aviso-honesto h2 { color: var(--alerta); }
.lista-limpia { list-style: none; padding: 0; margin: 1.6rem 0 0; display: grid; gap: .9rem; }
.lista-limpia li {
  display: flex; gap: .9rem; align-items: flex-start;
  color: var(--tenue); font-size: .97rem;
}
.lista-limpia li::before {
  content: "—"; color: var(--alerta); font-family: var(--dato); flex: none;
}

/* ---------- Calculadora ---------- */

.taller { display: grid; grid-template-columns: 380px 1fr; gap: 2.5rem; align-items: start; padding-block: 3rem var(--paso); }
.formulario { position: sticky; top: 88px; }
.campo { margin-bottom: 1.5rem; }
.campo label {
  display: block; font-family: var(--dato); font-size: .74rem;
  letter-spacing: .1em; text-transform: uppercase; color: var(--cota);
  margin-bottom: .55rem;
}
.campo .ayuda { font-size: .82rem; color: var(--tenue); margin: .4rem 0 0; }

input[type="number"], select {
  width: 100%;
  background: var(--sala-alta);
  border: 1px solid var(--borde);
  color: var(--tinta);
  font-family: var(--dato); font-size: 1rem;
  padding: .75rem .9rem;
  border-radius: var(--radio);
  transition: border-color .18s;
}
input[type="number"]:focus, select:focus { border-color: var(--cota); outline: none; }

.control-rango { display: flex; align-items: center; gap: 1rem; }
input[type="range"] { flex: 1; accent-color: var(--haz); }
.valor-rango {
  font-family: var(--dato); font-size: 1.05rem; color: var(--haz);
  min-width: 4.6rem; text-align: right;
}

.opciones { display: grid; gap: .5rem; }
.opcion {
  display: flex; align-items: center; gap: .7rem;
  padding: .7rem .9rem;
  background: var(--sala-alta);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  cursor: pointer; font-size: .93rem;
  transition: border-color .18s, background .18s;
}
.opcion:hover { border-color: var(--cota); }
.opcion input { accent-color: var(--haz); flex: none; }
.opcion:has(input:checked) { border-color: var(--haz); background: rgba(242,180,92,.07); }

/* ---------- Resultado ---------- */

.veredicto {
  background: var(--panel);
  border: 1px solid var(--borde);
  border-left: 3px solid var(--haz);
  border-radius: var(--radio);
  padding: 1.7rem;
  margin-bottom: 1.6rem;
}
.veredicto .titular {
  font-family: var(--display); font-size: 1.9rem; font-weight: 800;
  letter-spacing: -.02em; margin: 0 0 .4rem;
}
.veredicto .razon { color: var(--tenue); font-size: .95rem; margin: 0; }
.veredicto.empate { border-left-color: var(--cota); }
.veredicto.tv { border-left-color: var(--cota); }

.tabla-datos { display: grid; grid-template-columns: repeat(auto-fit, minmax(158px, 1fr)); gap: 1px; background: var(--borde); border: 1px solid var(--borde); border-radius: var(--radio); overflow: hidden; margin-bottom: 1.6rem; }
.celda-dato { background: var(--sala-alta); padding: 1.1rem; }
.celda-dato .clave { font-family: var(--dato); font-size: .66rem; letter-spacing: .12em; text-transform: uppercase; color: var(--tenue); display: block; margin-bottom: .45rem; }
.celda-dato .valor { font-family: var(--dato); font-size: 1.35rem; color: var(--tinta); }
.celda-dato .valor small { font-size: .8rem; color: var(--tenue); }

.aviso {
  display: flex; gap: .8rem; align-items: flex-start;
  background: rgba(224,104,90,.08);
  border: 1px solid rgba(224,104,90,.3);
  border-radius: var(--radio);
  padding: .95rem 1.1rem; margin-bottom: .8rem;
  font-size: .93rem; color: #F0BDB6;
}
.aviso::before { content: "!"; font-family: var(--dato); font-weight: 700; color: var(--alerta); flex: none; }

.lista-compra { display: grid; gap: .7rem; margin-top: 1rem; }
.articulo {
  display: grid; grid-template-columns: 1fr auto; gap: 1rem;
  align-items: center;
  background: var(--sala-alta);
  border: 1px solid var(--borde);
  border-left: 2px solid var(--cota);
  border-radius: var(--radio);
  padding: 1rem 1.2rem;
}
.articulo .que { font-weight: 600; font-size: .98rem; }
.articulo .criterio { font-family: var(--dato); font-size: .8rem; color: var(--tenue); margin-top: .25rem; }
.articulo .marca-pendiente { font-family: var(--dato); font-size: .7rem; color: var(--haz); letter-spacing: .08em; }

.pestanas { display: flex; gap: .4rem; margin-bottom: 1.4rem; flex-wrap: wrap; }
.pestana {
  font-family: var(--dato); font-size: .8rem;
  padding: .6rem 1.1rem; border-radius: var(--radio);
  background: var(--sala-alta); border: 1px solid var(--borde);
  color: var(--tenue); cursor: pointer;
}
.pestana[aria-selected="true"] { border-color: var(--haz); color: var(--haz); }

.vacio {
  border: 1px dashed var(--borde); border-radius: var(--radio);
  padding: 2.5rem 1.5rem; text-align: center; color: var(--tenue);
}

/* ---------- Guías ---------- */

.articulo-texto { max-width: 68ch; margin-inline: auto; padding-block: 3rem var(--paso); }
.articulo-texto h2 { margin-top: 2.4rem; }
.articulo-texto ul { color: var(--tenue); }
.articulo-texto li { margin-bottom: .5rem; }
.destacado {
  border-left: 2px solid var(--haz);
  padding: .3rem 0 .3rem 1.3rem;
  margin: 2rem 0;
  font-size: 1.08rem; color: var(--tinta);
}

/* ---------- Pie ---------- */

.pie { border-top: 1px solid var(--borde); padding: 3rem 0 2.5rem; margin-top: var(--paso); }
.pie .contenedor { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 2rem; }
.pie h4 { font-family: var(--dato); font-size: .72rem; letter-spacing: .13em; text-transform: uppercase; color: var(--cota); margin: 0 0 1rem; }
.pie a { display: block; color: var(--tenue); text-decoration: none; font-size: .92rem; margin-bottom: .55rem; }
.pie a:hover { color: var(--tinta); }
.pie .legal { grid-column: 1 / -1; border-top: 1px solid var(--borde); padding-top: 1.5rem; margin-top: 1rem; font-size: .82rem; color: var(--tenue); }

/* ---------- Adaptable ---------- */

@media (max-width: 900px) {
  .portada .contenedor { grid-template-columns: 1fr; }
  .taller { grid-template-columns: 1fr; }
  .formulario { position: static; }
  .rejilla-3, .rejilla-2 { grid-template-columns: 1fr; }
  .pie .contenedor { grid-template-columns: 1fr 1fr; }
  .menu { gap: 1rem; }
  .menu .oculta-movil { display: none; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .pie .contenedor { grid-template-columns: 1fr; }
}