/* ==========================================================================
   AREA UNITED · Base: fuentes, reset, tipografía, botones, utilidades
   ========================================================================== */

/* Knockout HTF50 Welterweight (único peso). Se excluyen del rango los glifos
   que faltan en esta copia (í, –, —, €) para que caigan a Barlow Condensed. */
@font-face {
  font-family: "Knockout";
  src: url("../assets/fonts/knockout.woff2") format("woff2"),
       url("../assets/fonts/knockout.otf") format("opentype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00EC, U+00EE-2012, U+2015-20AB, U+20AD-10FFFF;
}

/* Knockout Bold, ancha. Sin «→» ni «·» (U+2192, U+00B7): fuera del rango. */
@font-face {
  font-family: "Knockout Bold";
  src: url("../assets/fonts/knockout-bold.woff2") format("woff2"),
       url("../assets/fonts/knockout-bold.otf") format("opentype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00B6, U+00B8-2191, U+2193-10FFFF;
}

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

/* Scroll nativo en todos los anchos (sin scroll-behavior global; las anclas
   se desplazan suavemente por JS). Las clases .lenis solo actúan si se
   reactiva el scroll con inercia (AU.SMOOTH_SCROLL). */
html {
  -webkit-text-size-adjust: 100%;
  background: var(--black);
  scrollbar-gutter: stable;   /* bloquear el scroll durante la entrada no mueve el layout */
}
html.is-locked, html.is-locked body { overflow: hidden; }
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto; }
.lenis.lenis-stopped { overflow: hidden; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--black);
  color: var(--white);
  font-family: var(--font-text);
  font-size: var(--fs-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: clip;
}

img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 0; }

/* Foco por teclado: anillo amarillo de 2 px con separación */
:focus { outline: none; }
:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

::selection { background: var(--yellow); color: var(--black-pure); }

/* --- Tipografía de titulares --- */
.display {
  font-family: var(--font-display);
  font-weight: 400;
  text-transform: uppercase;
  line-height: var(--lh-display);
  letter-spacing: var(--ls-display);
}
.display--wide {
  font-family: var(--font-display-wide);
  letter-spacing: -0.01em;
  line-height: 0.92;
}
.display--outline {
  color: transparent;
  -webkit-text-stroke: 2px var(--white);
}
.display--outline-yellow {
  color: transparent;
  -webkit-text-stroke: 2px var(--yellow);
}
.text-yellow { color: var(--yellow); }
.text-gray { color: var(--gray-text); }

/* Etiquetas pequeñas: también en Knockout (solo los párrafos y datos van en Inter) */
.label {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--fs-label);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  line-height: 1.3;
}

.lead {
  font-size: var(--fs-body-lg);
  line-height: 1.55;
  color: var(--gray-text);
  max-width: 54ch;
}

/* --- Contenedor --- */
.container {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: var(--section-y); }

.section-head { margin-bottom: clamp(32px, 5vw, 64px); }
.section-head h2 { font-size: var(--fs-h2); max-width: 14ch; }
.section-head .label { color: var(--yellow); margin-bottom: 14px; display: block; }
.section-head .lead { margin-top: 20px; }

/* --- Botones (apartado 11.4) --- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: var(--btn-h);
  padding-inline: var(--btn-px);
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: var(--ls-button);
  text-transform: uppercase;
  line-height: 1;
  border-radius: 0;
  white-space: nowrap;
  transition: transform 200ms var(--ease-out), box-shadow 200ms var(--ease-out),
              background-color 200ms, color 200ms;
}
/* Primario: placa amarilla con esquinas cortadas en diagonal (chapa) y una
   sombra dura amarilla oscura 4 px abajo-derecha. Al pasar el ratón la placa
   se hunde sobre su sombra. Sin blanco. Sobre fondos claros, --btn-shadow-color: negro. */
.btn-primary {
  --cut: 10px;
  --btn-shadow-color: var(--yellow-dark);
  isolation: isolate;
  color: var(--black-pure);
  background: transparent;
  border: 0;
}
.btn-primary::before,
.btn-primary::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
  transition: transform 200ms var(--ease-out);
}
.btn-primary::before {
  background: var(--btn-shadow-color);
  transform: translate(var(--btn-shadow), var(--btn-shadow));
}
.btn-primary::after { background: var(--yellow); }
.btn-primary:hover, .btn-primary:active {
  transform: translate(var(--btn-shadow), var(--btn-shadow));
}
.btn-primary:hover::before, .btn-primary:active::before { transform: translate(0, 0); }
.btn-primary:focus-visible { box-shadow: none; outline: 2px solid var(--yellow); outline-offset: 4px; }

.btn-primary--sm {
  --cut: 7px;
  --btn-shadow: 3px;
  height: 40px;
  padding-inline: 14px;
  font-size: 16px;
}

/* Secundario: solo contorno fino, nunca relleno blanco */
.btn-secondary {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255,255,255,.6);
}
.btn-secondary:hover { color: var(--yellow); border-color: var(--yellow); }
.btn-secondary--yellow { color: var(--yellow); border-color: var(--yellow); }
.btn-secondary--yellow:hover { background: var(--yellow); color: var(--black-pure); }

/* Enlace de texto con flecha y subrayado amarillo que crece */
.link-arrow {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 16px;
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  padding-bottom: 4px;
}
.link-arrow::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--yellow);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-base) var(--ease-out);
}
.link-arrow:hover::after, .link-arrow:focus-visible::after { transform: scaleX(1); }
.link-arrow .arrow { transition: transform var(--t-base) var(--ease-out); }
.link-arrow:hover .arrow { transform: translateX(6px); }

/* Flechas: se dibujan en SVG para no depender de glifos */
.icon { width: 1em; height: 1em; fill: none; stroke: currentColor; stroke-width: 2; flex: none; }

/* --- Utilidades --- */
.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  top: 8px; left: 8px;
  z-index: 1000;
  padding: 10px 16px;
  background: var(--yellow);
  color: var(--black-pure);
  font-weight: 600;
  transform: translateY(-200%);
}
.skip-link:focus { transform: none; }

.dot {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--yellow);
  flex: none;
}

/* Grano fino: textura reutilizable (tarjeta Mobility, hero) */
.grain::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .5;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 .55 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* Negro granulado para fondos (cortina de entrada y hero). El ruido es un
   mosaico SVG rasterizado una sola vez; el «movimiento» es un desplazamiento a
   8 fps por steps() solo en transform. Opacidad por --grain (0.08 cortina, 0.04 hero). */
.grain-bg { position: relative; }
.grain-bg::before {
  content: "";
  position: absolute;
  inset: -40%;
  z-index: 0;
  pointer-events: none;
  opacity: var(--grain, .06);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='g'><feTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0'/></filter><rect width='100%' height='100%' filter='url(%23g)'/></svg>");
  background-size: 180px 180px;
  animation: grain-shift 1s steps(8) infinite;
  will-change: transform;
}
@keyframes grain-shift {
  0% { transform: translate(0, 0); }
  25% { transform: translate(-3%, 2%); }
  50% { transform: translate(2%, -3%); }
  75% { transform: translate(-2%, -1%); }
  100% { transform: translate(1%, 3%); }
}
/* Variante gruesa y contrastada (cortina de entrada): grano más grande, alfa
   realzado y desplazamiento más visible a 10 fps */
.grain-bg--coarse::before {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='g'><feTurbulence type='fractalNoise' baseFrequency='.7' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1.8 -0.35'/></filter><rect width='100%' height='100%' filter='url(%23g)'/></svg>");
  background-size: 220px 220px;
  animation: grain-shift-coarse .8s steps(8) infinite;
}
@keyframes grain-shift-coarse {
  0% { transform: translate(0, 0); }
  20% { transform: translate(-6%, 4%); }
  40% { transform: translate(5%, -6%); }
  60% { transform: translate(-4%, -3%); }
  80% { transform: translate(6%, 5%); }
  100% { transform: translate(-2%, 6%); }
}
@media (prefers-reduced-motion: reduce) {
  .grain-bg::before { animation: none; }
}

/* Separador entre secciones: la futura parte 2 solo tiene que añadir <section> */
.section + .section { border-top: var(--line); }