/* FERPEL — sistema visual compartido (portada y páginas legales).
   Sin fuentes ni recursos de terceros; modo claro y oscuro automáticos. */
:root {
  --bg: #f5f3ee;
  --surface: #fffefb;
  --ink: #15140f;
  --muted: #5b5850;
  --line: #ddd9ce;
  --brand: #15140f;
  --brand-ink: #f5f3ee;
  --app: #15140f;
  --app-ink: #ffffff;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --serif: "New York", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --radius: 22px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0e0c;
    --surface: #171714;
    --ink: #f2f0e9;
    --muted: #a5a299;
    --line: #2a2924;
    --brand: #f2f0e9;
    --brand-ink: #0e0e0c;
    --app: #f2f0e9;
    --app-ink: #0e0e0c;
  }
}
/* Color propio de cada app */
[data-app="per-facil"] { --app: #1f5fbf; --app-ink: #fff; }
[data-app="ccse-facil"] { --app: #0e5e56; --app-ink: #fff; }
[data-app="relevo"] { --app: #c2410c; --app-ink: #fff; }
[data-app="alterni"] { --app: #6b5b95; --app-ink: #fff; }
[data-app="celador-facil"] { --app: #007a5f; --app-ink: #fff; }
[data-app="radares-dgt"] { --app: #b88700; --app-ink: #0e0e0c; }
[data-app="nivelpro"] { --app: #FFC20E; --app-ink: #1C1F22; }
[data-app="aufmass-pro"] { --app: #0077A8; --app-ink: #fff; }
@media (prefers-color-scheme: dark) {
  [data-app="per-facil"] { --app: #6aa6ff; --app-ink: #0b1a30; }
  [data-app="ccse-facil"] { --app: #5ccabb; --app-ink: #06201c; }
  [data-app="relevo"] { --app: #fb923c; --app-ink: #2a1203; }
    [data-app="alterni"] { --app: #b9a9e6; --app-ink: #1a1230; }
  [data-app="celador-facil"] { --app: #52cda6; --app-ink: #06201c; }
  [data-app="aufmass-pro"] { --app: #00A8E8; --app-ink: #111827; }
    }

* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  background: var(--bg); color: var(--ink);
  font: 400 1.0625rem/1.65 var(--sans);
  -webkit-font-smoothing: antialiased; overflow-x: clip;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--app); outline-offset: 3px; border-radius: 4px; }
::selection { background: var(--ink); color: var(--bg); }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 50;
  background: var(--brand); color: var(--brand-ink); padding: 10px 16px;
}
.skip:focus { left: 0; }

.wrap { width: min(100% - 40px, 1120px); margin: 0 auto; }
.narrow { width: min(100% - 40px, 740px); margin: 0 auto; }

/* ---------- Cabecera ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  min-height: 62px;
}
.logo { font-weight: 800; letter-spacing: -0.02em; text-decoration: none; font-size: 1.15rem; }
.logo sup { font-size: .55em; font-weight: 500; margin-left: 1px; }
.site-header nav { display: flex; flex-wrap: wrap; gap: 4px 20px; font-size: .94rem; }
.site-header nav a { text-decoration: none; color: var(--muted); padding: 6px 0; }
.site-header nav a:hover, .site-header nav a[aria-current] { color: var(--ink); }

/* ---------- Componentes ---------- */
.eyebrow {
  font: 500 .76rem/1.4 var(--mono); letter-spacing: .12em; text-transform: uppercase;
  color: var(--muted);
}
.chip {
  display: inline-block; padding: 3px 11px; border: 1px solid var(--line); border-radius: 999px;
  font: 500 .72rem/1.5 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted);
}
.btn {
  display: inline-flex; align-items: center; gap: 8px; min-height: 48px; padding: 0 22px;
  border-radius: 999px; border: 1.5px solid var(--ink); text-decoration: none;
  font-weight: 600; font-size: .98rem; transition: transform .15s ease, background .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn--solid { background: var(--ink); color: var(--bg); }
.btn--app { background: var(--app); border-color: var(--app); color: var(--app-ink); }

.icon {
  --size: 64px;
  width: var(--size); height: var(--size); flex: none; border-radius: 22.5%;
  display: grid; place-items: center;
  background: var(--app); color: var(--app-ink);
  font: 800 calc(var(--size) * .5)/1 var(--serif);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.14), 0 6px 16px -8px rgba(0,0,0,.45);
}

/* ---------- Portada ---------- */
.hero { padding: clamp(56px, 11vw, 120px) 0 clamp(40px, 7vw, 72px); }
.hero h1 {
  font: 700 clamp(2.5rem, 8.2vw, 5.6rem)/1.02 var(--serif);
  letter-spacing: -0.03em; max-width: 14ch; margin: 18px 0 24px;
}
.hero h1 em { font-style: italic; font-weight: 500; color: var(--muted); }
.hero .lede { font-size: clamp(1.1rem, 2.2vw, 1.35rem); color: var(--muted); max-width: 36em; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }

.section { padding: clamp(40px, 7vw, 80px) 0; border-top: 1px solid var(--line); }
.section-head { display: grid; gap: 10px; margin-bottom: 30px; max-width: 40em; }
.section-head h2 {
  font: 700 clamp(1.8rem, 4.6vw, 2.8rem)/1.1 var(--serif); letter-spacing: -0.02em;
}
.section-head p { color: var(--muted); }

.apps { display: grid; gap: 18px; grid-template-columns: 1fr; }
.app-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: clamp(20px, 3vw, 28px); display: flex; flex-direction: column; gap: 18px;
}
.app-card__top { display: flex; align-items: center; gap: 16px; }
.app-card h3 { font: 700 1.45rem/1.15 var(--serif); letter-spacing: -0.01em; }
.app-card .chip { margin-top: 6px; }
.app-card p { color: var(--muted); }
.app-card ul { list-style: none; display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: .92rem; color: var(--muted); }
.app-card li::before { content: "·"; margin-right: 8px; color: var(--app); font-weight: 900; }
.app-card__links {
  margin-top: auto; padding-top: 16px; border-top: 1px solid var(--line);
  display: flex; flex-wrap: wrap; gap: 8px 20px; font-size: .94rem; font-weight: 500;
}
.app-card__links a { color: var(--ink); text-decoration-color: var(--app); text-decoration-thickness: 2px; }
.app-card__links a:hover { color: var(--app); }

.principles { display: grid; gap: 18px; grid-template-columns: 1fr; }
.principles li { list-style: none; }
.principles h3 { font: 700 1.2rem/1.2 var(--serif); margin-bottom: 6px; }
.principles p { color: var(--muted); }
.principles .n { font: 500 .76rem var(--mono); color: var(--muted); display: block; margin-bottom: 8px; }

.cases { display: grid; gap: 18px; grid-template-columns: 1fr; }
.case {
  display: flex; flex-direction: column; text-decoration: none;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  transition: transform .2s ease, border-color .2s ease;
}
.case:hover { transform: translateY(-3px); border-color: var(--ink); }
.case img { aspect-ratio: 16 / 9; object-fit: cover; width: 100%; background: var(--line); }
.case div { padding: 18px 20px 22px; }
.case h3 { font: 700 1.3rem/1.2 var(--serif); }
.case p { color: var(--muted); font-size: .96rem; margin-top: 4px; }
.case .eyebrow { margin-top: 12px; display: block; }

.lab { list-style: none; border-top: 1px solid var(--line); }
.lab li {
  display: grid; grid-template-columns: 1fr; gap: 2px 20px; padding: 16px 0; border-bottom: 1px solid var(--line);
}
.lab strong { font: 700 1.15rem var(--serif); }
.lab span { color: var(--muted); }
.lab em { font: normal 500 .74rem var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }

.contact { text-align: left; }
.contact a.mail {
  display: inline-block; margin: 6px 0 16px; word-break: break-word;
  font: 700 clamp(1.5rem, 5.4vw, 3rem)/1.15 var(--serif); letter-spacing: -0.02em;
  text-decoration-thickness: 3px; text-decoration-color: var(--muted);
}
.contact a.mail:hover { text-decoration-color: var(--ink); }
.contact p { color: var(--muted); max-width: 32em; }

/* ---------- Páginas legales ---------- */
.subnav { border-bottom: 1px solid var(--line); background: var(--surface); }
.subnav .wrap { display: flex; align-items: center; gap: 14px 22px; flex-wrap: wrap; padding: 14px 0; }
.subnav .app-name { display: flex; align-items: center; gap: 12px; font-weight: 700; text-decoration: none; margin-right: auto; }
.subnav .icon { --size: 34px; }
.subnav nav { display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: .94rem; }
.subnav nav a { color: var(--muted); text-decoration: none; padding: 4px 0; border-bottom: 2px solid transparent; }
.subnav nav a:hover { color: var(--ink); }
.subnav nav a[aria-current] { color: var(--ink); border-bottom-color: var(--app); }

.legal { padding: clamp(40px, 8vw, 88px) 0 clamp(48px, 8vw, 96px); }
.legal .eyebrow { color: var(--app); margin-bottom: 16px; }
.legal h1 {
  font: 700 clamp(2.1rem, 6.4vw, 3.6rem)/1.08 var(--serif); letter-spacing: -0.025em;
  margin-bottom: 24px;
}
.legal h1 .ast { display: none; }
.legal .lede {
  font-size: clamp(1.1rem, 2.2vw, 1.3rem); line-height: 1.55;
  border-left: 3px solid var(--app); padding-left: clamp(14px, 3vw, 22px);
  margin-bottom: clamp(32px, 6vw, 56px);
}
.legal .actions { display: flex; flex-wrap: wrap; gap: 12px; margin: -20px 0 36px; }
.block { padding: 26px 0; border-top: 1px solid var(--line); }
.block h2 { font: 700 clamp(1.25rem, 3vw, 1.6rem)/1.2 var(--serif); margin-bottom: 12px; letter-spacing: -0.01em; }
.block p, .block li, .block dd { color: var(--muted); }
.block p + p, .block ul + p, .block p + ul { margin-top: 12px; }
.block strong { color: var(--ink); font-weight: 600; }
.block ul, .block ol { padding-left: 1.25em; }
.block li + li { margin-top: 7px; }
.block li::marker { color: var(--app); }
.block a, .updated a { color: var(--ink); text-decoration-color: var(--app); text-decoration-thickness: 2px; }
.block a:hover, .updated a:hover { color: var(--app); }
.updated {
  margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--line);
  font: 500 .76rem/1.7 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted);
}
.back { display: inline-block; margin-top: 28px; font-weight: 600; text-decoration: none; }
.back:hover { color: var(--app); }
.legal .english { margin-top: 40px; border-top: 3px solid var(--app); }
.legal .english .tag { margin-top: 22px; }

.cards { display: grid; gap: 14px; margin-top: 8px; grid-template-columns: 1fr; }
.cards a {
  display: block; text-decoration: none; background: var(--surface); border: 1px solid var(--line);
  border-radius: 18px; padding: 20px; transition: border-color .2s ease, transform .2s ease;
}
.cards a:hover { border-color: var(--app); transform: translateY(-2px); }
.cards .eyebrow { display: block; color: var(--app); margin-bottom: 8px; }
.cards h2 { font: 700 1.3rem var(--serif); }
.cards p { color: var(--muted); font-size: .96rem; margin-top: 4px; }

/* ---------- Pie ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 40px 0 48px; font-size: .92rem; color: var(--muted); }
.site-footer .cols { display: grid; gap: 28px 40px; grid-template-columns: repeat(2, 1fr); }
.site-footer h2 { font: 500 .72rem var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--ink); margin-bottom: 10px; }
.site-footer ul { list-style: none; display: grid; gap: 6px; }
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: var(--ink); text-decoration: underline; }
.site-footer .base {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px;
  margin-top: 34px; padding-top: 20px; border-top: 1px solid var(--line);
  font: 400 .74rem var(--mono); letter-spacing: .06em; text-transform: uppercase;
}

@media (min-width: 720px) {
  .apps { grid-template-columns: 1fr 1fr; }
  .principles { grid-template-columns: repeat(3, 1fr); gap: 32px; }
  .cases { grid-template-columns: repeat(3, 1fr); }
  .lab li { grid-template-columns: 180px 1fr auto; align-items: baseline; }
  .cards { grid-template-columns: repeat(3, 1fr); }
  .site-footer .cols { grid-template-columns: repeat(4, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .case, .cards a { transition: none; }
}