/* Reasoned Web — hoja única, autorada a mano. Sin framework.
   Contraste AA MEDIDO contra el fondo realmente pintado (WCAG 2.1):
     tinta  #16181C sobre papel #F3F4F3 → 16.12:1
     gris   #555A61 sobre papel         →  6.30:1
     azul   #2C6ECB sobre papel         →  4.53:1 (siempre ≥600 de peso)
     azul   #245CB0 sobre chip #E9EDF3  →  5.53:1 (marcadores [n])
     papel  sobre tinta                 → 16.12:1
     azul   #7FA9E0 sobre tinta         →  7.32:1
     gris   #A6ABB3 sobre tinta         →  7.70:1
   El azul es SOLO aparato (marcadores, derivaciones, notas) — jamás marca. */

@font-face { font-family: Switzer; src: url("../fonts/Switzer-Regular.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: Switzer; src: url("../fonts/Switzer-Medium.woff2") format("woff2"); font-weight: 500; font-display: swap; }
@font-face { font-family: Switzer; src: url("../fonts/Switzer-Semibold.woff2") format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: Switzer; src: url("../fonts/Switzer-Bold.woff2") format("woff2"); font-weight: 700; font-display: swap; }

:root {
  --ink: #16181C;
  --paper: #F3F4F3;
  --muted: #555A61;
  --line: #DADCDA;
  --note: #2C6ECB;
  --note-strong: #245CB0;
  --note-chip: #E9EDF3;
  --note-on-ink: #7FA9E0;
  --muted-on-ink: #A6ABB3;
  --measure: 62ch;
  /* Derivados congelados de la identidad (brand/derivation.json) */
  --track-line1: 0.02em;
  --wordmark-gap: 1.583em;
}

* { margin: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
::selection { background: var(--ink); color: var(--paper); }

body {
  background: var(--paper);
  color: var(--ink);
  font: 400 clamp(1rem, 0.95rem + 0.3vw, 1.125rem)/1.6 Switzer, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-underline-offset: 0.16em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
img { max-width: 100%; height: auto; display: block; }
p { max-width: var(--measure); }

/* Revelado: SOLO imágenes y tarjetas — el texto jamás se anima. */
.js [data-reveal] { opacity: 0; transform: translateY(14px); transition: opacity 0.55s ease, transform 0.55s ease; }
.js [data-reveal].en-escena { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js [data-reveal] { opacity: 1; transform: none; transition: none; }
}

.wrap { max-width: 72rem; margin-inline: auto; padding-inline: clamp(1.1rem, 5vw, 3rem); }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--paper); padding: 0.6rem 1rem; z-index: 10;
}
.skip:focus { left: 0; }

/* ── Nav ─────────────────────────────────────────────────────────── */
.nav { padding-block: 1.4rem; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.9rem 1rem; }
.nav .lockup { display: block; color: var(--ink); }
/* el lockup cede antes que forzar desborde: a 320px la nav debe caber entera */
.nav .lockup svg { height: clamp(0.95rem, 4.2vw, 1.35rem); width: auto; display: block; }
.nav a.cta {
  font-weight: 600; font-size: 0.95rem; text-decoration: none;
  border: 1.5px solid var(--ink); padding: 0.55rem 1.1rem; white-space: nowrap;
}
.nav a.cta:hover, .nav a.cta:focus-visible { background: var(--ink); color: var(--paper); }
.crumb { font-size: 0.85rem; color: var(--muted); }
.crumb a { color: inherit; }

/* ── Hero ────────────────────────────────────────────────────────── */
.hero { padding-block: clamp(3.5rem, 10vw, 8rem) clamp(3rem, 7vw, 5.5rem); }
.hero .wordmark { width: min(37rem, 94%); }
.hero .wordmark svg { width: 100%; height: auto; display: block; }
.hero .derivation { margin-top: 1.2rem; padding-top: 0.8rem; border-top: 1px solid var(--line); font-size: 0.8rem; font-weight: 600; color: var(--note); max-width: 46ch; }
.hero .thesis { margin-top: clamp(2.2rem, 5vw, 3.2rem); font-size: clamp(1.2rem, 1rem + 1.1vw, 1.65rem); line-height: 1.42; font-weight: 500; max-width: 42ch; letter-spacing: -0.008em; }
.hero .sub { margin-top: 1.1rem; color: var(--muted); }
.hero .go { margin-top: 2.4rem; }
a.boton {
  display: inline-block; font-weight: 600; text-decoration: none;
  background: var(--ink); color: var(--paper); padding: 0.9rem 1.6rem;
  transition: background 0.15s ease;
}
a.boton:hover { background: #2A2E36; }
a.boton:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }

/* ── Secciones ───────────────────────────────────────────────────── */
section { padding-block: clamp(3.2rem, 8vw, 6.5rem); border-top: 1px solid var(--line); }
.kicker { display: inline-flex; align-items: center; gap: 0.6em; color: var(--note); font-size: 0.78rem; font-weight: 600; letter-spacing: 0.09em; text-transform: uppercase; }
/* el módulo del glifo, en azul de aparato, abre cada kicker */
.kicker::before { content: ""; width: 0.55em; height: 0.55em; background: var(--note); flex: none; }
h2 { font-size: clamp(1.6rem, 1.3rem + 1.6vw, 2.4rem); font-weight: 700; letter-spacing: -0.015em; line-height: 1.12; margin: 0.5rem 0 1.1rem; max-width: 24ch; }
h3 { font-size: 1.15rem; font-weight: 600; letter-spacing: -0.005em; margin-bottom: 0.5rem; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
section p + p { margin-top: 0.9rem; }

/* Etiquetado honesto — clases de encargo, siempre visibles */
.label { display: inline-block; font-size: 0.78rem; font-weight: 600; letter-spacing: 0.02em; color: var(--muted); border: 1px solid var(--line); padding: 0.25rem 0.6rem; margin-top: 0.9rem; }

/* ── Caso LG en home ─────────────────────────────────────────────── */
.case-lead { display: grid; gap: 2rem; margin-top: 1.5rem; }
@media (min-width: 60rem) { .case-lead { grid-template-columns: 3fr 2fr; align-items: start; } }
.case-lead .shot { border: 1px solid var(--line); }
.chain { list-style: none; padding: 0; margin: 1.1rem 0 0; font-weight: 500; font-size: 0.95rem; }
.chain li { padding: 0.5rem 0; border-bottom: 1px solid var(--line); }
.chain li::before { content: ""; display: inline-block; width: 0.55em; height: 0.55em; background: var(--ink); margin-right: 0.7em; }

/* ── Rediseños ───────────────────────────────────────────────────── */
.cards { display: grid; gap: 2rem; margin-top: 2rem; }
@media (min-width: 46rem) { .cards { grid-template-columns: 1fr 1fr; } }
/* mat de tinta uniforme: cuatro paletas ajenas dejan de pelearse entre sí */
.card .shot { background: var(--ink); border: none; padding: 0.5rem; aspect-ratio: 16 / 10; object-fit: cover; object-position: top; width: 100%; }
.card h3 { margin-top: 1rem; }
.card p { font-size: 0.95rem; }
.card a.leer { font-weight: 600; font-size: 0.92rem; white-space: nowrap; }
.card a.leer::after { content: " →"; }

/* ── Aparato de notas al pie — la interacción-firma ──────────────── */
button.fn-ref {
  font: inherit; font-size: 0.85em; font-weight: 700; color: var(--note-strong);
  background: var(--note-chip); border: none; border-radius: 3px;
  padding: 0.05em 0.4em; margin-left: 0.25em; cursor: pointer; vertical-align: 0.08em;
}
button.fn-ref:hover { background: #DCE4EF; }
button.fn-ref:focus-visible { outline: 2px solid var(--note); outline-offset: 2px; }
.fn-note {
  border-left: 3px solid var(--note); background: #E9EDF3;
  padding: 1.1rem 1.3rem; margin: 1.3rem 0; max-width: 46rem; font-size: 0.95rem;
}
.js .fn-note:not([hidden]) { animation: nota-entra 0.25s ease; }
@keyframes nota-entra { from { opacity: 0; transform: translateY(-4px); } }
@media (prefers-reduced-motion: reduce) { .js .fn-note:not([hidden]) { animation: none; } }
.fn-note .fn-num { color: var(--note); font-weight: 700; margin-right: 0.5em; }
.fn-note p { max-width: 58ch; }
.fn-note p + p { margin-top: 0.6rem; }
.js .fn-note[hidden] { display: none; }

/* ── Método ──────────────────────────────────────────────────────── */
.metodo ol { margin: 1.5rem 0 0; padding-left: 1.2rem; max-width: 52ch; }
.metodo li { padding-block: 0.4rem; }
.metodo li::marker { font-weight: 700; color: var(--note); }

/* ── Contacto ────────────────────────────────────────────────────── */
form { display: grid; gap: 1.1rem; max-width: 34rem; margin-top: 1.8rem; }
label { font-weight: 600; font-size: 0.92rem; display: grid; gap: 0.4rem; }
input, textarea {
  font: inherit; color: var(--ink); background: #fff;
  border: 1.5px solid var(--muted); padding: 0.7rem 0.85rem; width: 100%;
}
input:focus-visible, textarea:focus-visible { outline: 2px solid var(--note); outline-offset: 1px; }
button.enviar {
  font: inherit; font-weight: 600; background: var(--ink); color: var(--paper);
  border: none; padding: 0.85rem 1.5rem; cursor: pointer; justify-self: start;
}
button.enviar:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.form-status { font-size: 0.92rem; color: var(--muted); }
.form-status[data-live="1"] { color: var(--ink); font-weight: 500; }

/* ── Pie ─────────────────────────────────────────────────────────── */
footer.pie { background: var(--ink); color: var(--paper); margin-top: 4rem; position: relative; overflow: hidden; }
footer.pie .wrap { padding-block: 3.5rem; position: relative; }
/* el glifo como marca de agua del cierre — decorativo, aria-hidden */
footer.pie .sello { position: absolute; right: clamp(1rem, 6vw, 4rem); bottom: -1.2rem; width: 7.5rem; color: #262B33; }
footer.pie .sello svg { width: 100%; height: auto; display: block; }
footer.pie .lockup { color: var(--paper); display: inline-block; }
footer.pie .lockup svg { height: 1.15rem; width: auto; }
footer.pie p { color: var(--muted-on-ink); font-size: 0.88rem; margin-top: 1.1rem; }
footer.pie a { color: var(--paper); }

/* ── Página de caso ──────────────────────────────────────────────── */
.case-head { padding-block: clamp(2.5rem, 6vw, 4.5rem) 0; }
.case-head h1 { font-size: clamp(2rem, 1.4rem + 3vw, 3.4rem); font-weight: 700; letter-spacing: -0.02em; line-height: 1.08; max-width: 18ch; }
.case-head .attrib { margin-top: 1rem; font-size: 1.05rem; font-weight: 500; max-width: 52ch; }
.gate {
  border: 2px solid var(--ink); padding: clamp(1.3rem, 3vw, 2rem); margin-top: 2.5rem; max-width: 52rem;
}
.gate .kicker { color: var(--note); }
.gate p { font-size: 0.97rem; margin-top: 0.7rem; max-width: 58ch; }
.gate p strong { font-weight: 700; }
.gate .entrar {
  display: inline-block; margin-top: 1.3rem; font-weight: 600; text-decoration: none;
  background: var(--ink); color: var(--paper); padding: 0.85rem 1.5rem;
}
.gate .entrar:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.legal {
  border-top: 1px solid var(--line); margin-top: 4rem; padding-top: 1.6rem;
  font-size: 0.82rem; color: var(--muted); max-width: 52rem;
}
.legal p { max-width: none; }
.facts { margin: 1.4rem 0 0; padding-left: 1.2rem; max-width: 56ch; }
.facts li { padding-block: 0.3rem; }