/* Amplaria — hoja de estilos única.
   Principio: nada en esta hoja puede bajar de 7:1 de contraste en texto. */

:root {
  --ink:        #101b2d;
  --ink-soft:   #33445c;
  --paper:      #ffffff;
  --band:       #e9edf4;
  --band-deep:  #d5dde9;
  --line:       #aab6c8;
  --accent:     #a8005a;
  --accent-hi:  #ff8ec0;
  --focus:      #005ecb;

  --measure: 62ch;
  --step--1: clamp(0.94rem, 0.9rem + 0.2vw, 1.02rem);
  --step-0:  clamp(1.06rem, 1rem + 0.3vw, 1.22rem);
  --step-1:  clamp(1.3rem, 1.15rem + 0.7vw, 1.65rem);
  --step-2:  clamp(1.6rem, 1.3rem + 1.4vw, 2.4rem);
  --step-3:  clamp(2.1rem, 1.5rem + 2.9vw, 4.2rem);
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Atkinson Hyperlegible", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  font-size: var(--step-0);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { line-height: 1.1; margin: 0 0 .5em; font-weight: 700; letter-spacing: -0.015em; }
h1 { font-size: var(--step-3); letter-spacing: -0.03em; }
h2 { font-size: var(--step-2); }
h3 { font-size: var(--step-1); letter-spacing: -0.01em; }
p  { margin: 0 0 1em; max-width: var(--measure); }

a { color: var(--accent); text-underline-offset: 0.18em; text-decoration-thickness: 0.09em; }
a:hover { text-decoration-thickness: 0.16em; }

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

img, svg { max-width: 100%; height: auto; }

/* ---------- Estructura ---------- */

.wrap { width: min(100% - 2.5rem, 1140px); margin-inline: auto; }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 99;
  background: var(--ink); color: #fff; padding: .85rem 1.25rem;
  font-weight: 700; text-decoration: none;
}
.skip:focus { left: 0; }

section { padding-block: clamp(3.5rem, 7vw, 6.5rem); }
.band { background: var(--band); }
.dark { background: var(--ink); color: #fff; }
.dark h2, .dark h3 { color: #fff; }
.dark a { color: var(--accent-hi); }
.dark :focus-visible { outline-color: #ffffff; }

.lede { font-size: var(--step-1); line-height: 1.4; max-width: 34ch; color: var(--ink-soft); }
.dark .lede { color: #ccd6e4; }

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

.site-head {
  border-bottom: 2px solid var(--ink);
  padding-block: 1.1rem;
  position: sticky; top: 0; background: var(--paper); z-index: 20;
}
.head-row { display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap; }

.brand {
  font-weight: 700; font-size: 1.4rem; letter-spacing: -0.04em;
  color: var(--ink); text-decoration: none; margin-right: auto;
  display: inline-flex; align-items: baseline; gap: .45rem;
}
.brand span { width: .55rem; height: .55rem; background: var(--accent); border-radius: 50%; }

.site-nav ul { display: flex; gap: 1.5rem; list-style: none; margin: 0; padding: 0; flex-wrap: wrap; }
.site-nav a { color: var(--ink); text-decoration: none; border-bottom: 2px solid transparent; padding-block: .2rem; font-size: var(--step--1); }
.site-nav a:hover { border-bottom-color: var(--accent); }

.langs { display: flex; gap: .4rem; list-style: none; margin: 0; padding: 0; }
.langs a {
  display: block; padding: .28rem .6rem; font-size: .85rem; font-weight: 700;
  text-decoration: none; color: var(--ink); border: 2px solid var(--line); border-radius: 3px;
}
.langs a:hover { border-color: var(--ink); }
.langs a[aria-current="true"] { background: var(--ink); color: #fff; border-color: var(--ink); }

/* ---------- Héroe ---------- */

.hero { padding-block: clamp(3rem, 6vw, 5.5rem) clamp(2.5rem, 5vw, 4rem); }
.hero h1 { max-width: 15ch; }
.hero .lede { max-width: 44ch; margin-bottom: 2rem; }

.actions { display: flex; gap: .9rem; flex-wrap: wrap; align-items: center; }

.btn {
  display: inline-block; font-weight: 700; font-size: var(--step-0);
  padding: .85rem 1.5rem; border-radius: 4px; text-decoration: none;
  border: 2px solid var(--accent); background: var(--accent); color: #fff;
}
.btn:hover { background: #850047; border-color: #850047; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: #fff; }

/* ---------- Demostración de legibilidad ---------- */

.demo { border: 2px solid var(--ink); border-radius: 6px; overflow: hidden; margin-top: 1rem; }
.demo-bar { background: var(--ink); color: #fff; padding: 1rem 1.25rem; }
.demo-bar p { color: #ccd6e4; margin: .35rem 0 0; font-size: var(--step--1); max-width: 60ch; }
.demo-bar h2 { font-size: var(--step-1); margin: 0; color: #fff; }

.controls { display: flex; gap: 1.4rem; flex-wrap: wrap; padding: 1rem 1.25rem; background: var(--band); border-bottom: 2px solid var(--ink); }
.controls label { display: flex; align-items: center; gap: .55rem; font-size: var(--step--1); font-weight: 700; cursor: pointer; }
.controls input { width: 1.25rem; height: 1.25rem; accent-color: var(--accent); cursor: pointer; }

.panes { display: grid; grid-template-columns: 1fr 1fr; }
@media (max-width: 720px) { .panes { grid-template-columns: 1fr; } }

.pane { padding: 1.5rem 1.25rem; }
.pane + .pane { border-left: 2px solid var(--ink); }
@media (max-width: 720px) { .pane + .pane { border-left: 0; border-top: 2px solid var(--ink); } }
.pane h3 { font-size: var(--step--1); margin-bottom: 1rem; }
.tag { display: inline-block; padding: .15rem .5rem; border-radius: 3px; font-size: .8rem; font-weight: 700; }
.tag-bad { background: var(--band-deep); color: var(--ink); }
.tag-good { background: var(--accent); color: #fff; }

/* Panel "típico": deliberadamente mal construido, para el contraste */
.pane-bad .card { font-size: .8rem; color: #9aa3ad; }
.pane-bad .card .price { color: #b6bcc4; }
.pane-bad .card button { background: #eef0f2; color: #a6adb5; border: 1px solid #e2e5e8; }
.pane-bad .card button:focus { outline: none; }

.pane-good .card { font-size: var(--step-0); color: var(--ink); }
.pane-good .card .price { color: var(--ink); font-weight: 700; }
.pane-good .card button { background: var(--accent); color: #fff; border: 2px solid var(--accent); font-weight: 700; }

.card { border: 1px solid var(--line); border-radius: 5px; padding: 1.1rem; background: #fff; }
.card p { margin: 0 0 .6rem; }
.card .price { display: block; margin-bottom: .9rem; }
.card button { padding: .6rem 1.1rem; border-radius: 4px; font-family: inherit; font-size: inherit; cursor: pointer; }

/* Condiciones simuladas */
.sim-lowvision .panes { filter: contrast(0.52) blur(0.7px); }
.sim-zoom .card { font-size: 1.75em; }
.sim-zoom .pane-bad .card { font-size: 1.4em; }
.sim-keyboard .pane-good .card button { outline: 3px solid var(--focus); outline-offset: 3px; }
.sim-keyboard .pane-bad .card button { outline: none; }

.demo-note { padding: 1rem 1.25rem; background: var(--band); border-top: 2px solid var(--ink); font-size: var(--step--1); }
.demo-note p { margin: 0; max-width: 75ch; }

/* ---------- Rejillas ---------- */

.grid { display: grid; gap: 2rem; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }

.svc { border-top: 3px solid var(--ink); padding-top: 1.2rem; }
.svc p { font-size: var(--step--1); color: var(--ink-soft); }
.svc .from { display: block; margin-top: .8rem; font-weight: 700; color: var(--accent); font-size: var(--step--1); }

.pledge { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.4rem; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.pledge li { border-left: 3px solid var(--accent-hi); padding-left: 1.1rem; }
.pledge strong { display: block; font-size: var(--step-1); margin-bottom: .25rem; }
.pledge span { color: #ccd6e4; font-size: var(--step--1); }

/* Proceso: es una secuencia real, por eso va numerado */
.steps { list-style: none; margin: 0; padding: 0; counter-reset: s; display: grid; gap: 1.8rem; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.steps li { counter-increment: s; border-top: 3px solid var(--line); padding-top: 1rem; }
.steps li::before {
  content: counter(s); display: block; font-size: var(--step-2);
  font-weight: 700; color: var(--accent); line-height: 1; margin-bottom: .4rem;
}
.steps h3 { font-size: var(--step-0); }
.steps p { font-size: var(--step--1); color: var(--ink-soft); margin: 0; }

/* ---------- Contacto y pie ---------- */

.contact-mail {
  display: inline-block; font-size: var(--step-2); font-weight: 700;
  color: #fff; text-decoration: underline; text-decoration-thickness: .06em;
  text-underline-offset: .14em; word-break: break-word;
}
.dark .contact-mail { color: #fff; }
.contact-mail:hover { color: var(--accent-hi); }

.site-foot { border-top: 2px solid var(--ink); padding-block: 2.5rem; font-size: var(--step--1); }
.site-foot p { color: var(--ink-soft); }
.foot-row { display: flex; gap: 2.5rem; flex-wrap: wrap; justify-content: space-between; }