/* ==========================================================================
   ZOLDERTECH · Base y componentes compartidos
   Reset, tipografía, layout, botones, paneles, header y footer.
   Reutilizable por el INDEX y por cualquier página futura.
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }
html {
  background: var(--z-black);
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}
body {
  margin: 0;
  background: var(--z-black);
  color: var(--z-white);
  font-family: var(--f-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; padding: 0; }
h1, h2, h3, p, ul, ol, dl, dd, figure { margin: 0; padding: 0; }
ul, ol { list-style: none; }
::selection { background: var(--z-yellow); color: #000; }

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

.skip-link {
  position: absolute; left: var(--s-4); top: -60px; z-index: 200;
  background: var(--z-yellow); color: #000; padding: .6rem 1rem;
  font-family: var(--f-mono); font-size: .8rem; letter-spacing: .08em;
}
.skip-link:focus { top: var(--s-4); }

/* ---- Grano sutil global (evita banding en negros) ---- */
body::after {
  content: ""; position: fixed; inset: 0; z-index: 150; pointer-events: none;
  opacity: .045; 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 .9 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* ---- Layout ---- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.section { position: relative; padding-block: clamp(var(--s-8), 8vw, var(--s-9)); }

/* ---- Tipografía ---- */
.display {
  font-family: var(--f-display);
  font-weight: 700;
  font-stretch: 112%;
  line-height: 1.04;
  letter-spacing: -.01em;
}
.h2 { font-size: clamp(1.75rem, 1.3rem + 2vw, 3rem); }
.mono {
  font-family: var(--f-mono);
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: .9rem;
  color: var(--z-silver);
}
.eyebrow::before {
  content: ""; width: 34px; height: 2px; background: var(--z-red); flex: none;
}
.lead { font-size: clamp(1.05rem, 1rem + .35vw, 1.25rem); color: var(--z-silver); max-width: 58ch; }
.text-yellow { color: var(--z-yellow); }
.text-dim { color: var(--z-dim); }

/* ---- Franjas del isotipo (motivo estructural) ---- */
.pleats {
  height: 15px; width: 100%;
  background: repeating-linear-gradient(to bottom, var(--z-red) 0 2px, transparent 2px 5px);
  -webkit-mask-image: linear-gradient(90deg, #000 0%, #000 22%, transparent 100%);
          mask-image: linear-gradient(90deg, #000 0%, #000 22%, transparent 100%);
  opacity: .9;
}

/* ---- Botones ---- */
.btn {
  --bg: transparent; --fg: var(--z-white); --bd: var(--z-line);
  position: relative; isolation: isolate; overflow: hidden;
  display: inline-flex; align-items: center; justify-content: center; gap: .7rem;
  min-height: 48px; padding: .8rem 1.5rem;
  font-family: var(--f-display); font-stretch: 112%; font-weight: 600;
  font-size: .9rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--fg); background: var(--bg);
  border: 1px solid var(--bd); border-radius: var(--radius);
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.btn svg { width: 16px; height: 16px; flex: none; transition: transform var(--t-fast) var(--ease); }
.btn:hover svg { transform: translateX(4px); }
.btn:active { transform: translateY(1px); }

.btn--primary {
  --bg: var(--z-yellow); --fg: #0a0a0a; --bd: var(--z-yellow);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  border-radius: var(--radius) 0 var(--radius) var(--radius);
}
/* barrido de franjas al pasar el mouse */
.btn--primary::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: repeating-linear-gradient(to bottom, rgba(0,0,0,.16) 0 2px, transparent 2px 5px);
  transform: translateX(-101%);
  transition: transform 450ms var(--ease);
}
.btn--primary:hover::before { transform: translateX(0); }

.btn--ghost:hover { border-color: var(--z-yellow); color: var(--z-yellow); }

.btn--sm { min-height: 40px; padding: .5rem 1.1rem; font-size: .78rem; }

/* ---- Paneles (estilo instrumento) ---- */
.panel {
  position: relative;
  background: var(--z-anthracite);
  border: 1px solid var(--z-line);
  border-radius: var(--radius);
  --mx: 50%; --my: 50%;
}
/* foco de luz que sigue al cursor */
.panel::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  background: radial-gradient(360px circle at var(--mx) var(--my), rgba(255,217,0,.07), transparent 60%);
  opacity: 0; transition: opacity var(--t-med) var(--ease);
}
.panel:hover::before { opacity: 1; }
/* marcas de registro en las esquinas */
.ticks > i { position: absolute; width: 9px; height: 9px; border: 0 solid var(--z-silver); opacity: .55; pointer-events: none; }
.ticks > i:nth-child(1) { top: -1px; left: -1px; border-top-width: 1px; border-left-width: 1px; }
.ticks > i:nth-child(2) { top: -1px; right: -1px; border-top-width: 1px; border-right-width: 1px; }
.ticks > i:nth-child(3) { bottom: -1px; left: -1px; border-bottom-width: 1px; border-left-width: 1px; }
.ticks > i:nth-child(4) { bottom: -1px; right: -1px; border-bottom-width: 1px; border-right-width: 1px; }

/* ---- Logo oficial (recorte visual del archivo original, sin modificarlo) ----
   El JPG tiene fondo #000. mix-blend-mode: lighten lo funde con el fondo
   de la página sin editar el archivo ni sus colores.
   IMPORTANTE: ningún ancestro de .logo-crop debe tener transform/opacity/filter,
   porque crearía un contexto de apilamiento y anularía la mezcla. */
.logo-crop {
  position: relative; overflow: hidden;
  background: var(--z-black); /* la mezcla se hace contra este fondo, a prueba de contextos de apilamiento */
  aspect-ratio: var(--cw) / var(--ch);
  --iw: 1600; /* ancho original del archivo */
}
.logo-crop img {
  position: absolute; max-width: none; height: auto;
  width: calc(var(--iw) / var(--cw) * 100%);
  left: calc(var(--cx) / var(--cw) * -100%);
  top: calc(var(--cy) / var(--ch) * -100%);
  mix-blend-mode: lighten;
}
/* Recorte: isotipo + wordmark (sin eslogan) */
.logo-crop--compact { --cx: 90; --cy: 198; --cw: 1436; --ch: 372; }
/* Recorte: logo completo con eslogan */
.logo-crop--full    { --cx: 90; --cy: 192; --cw: 1436; --ch: 452; }

/* ---- Header ---- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--header-h);
  display: flex; align-items: center;
  background: rgba(8,8,8,0);
  border-bottom: 1px solid transparent;
  transition: height var(--t-med) var(--ease), background var(--t-med) var(--ease), border-color var(--t-med) var(--ease);
}
.site-header.is-scrolled {
  --header-h: 60px; height: 60px;
  background: rgba(8,8,8,.78);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom-color: var(--z-line);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; gap: var(--s-5); }
.brand { display: block; height: 40px; aspect-ratio: 1436 / 372; flex: none; }
.brand .logo-crop { display: block; width: 100%; height: 100%; }

.nav { display: flex; align-items: center; gap: var(--s-6); }
.nav__list { display: flex; gap: clamp(1rem, 2.2vw, 2.25rem); }
.nav__link {
  position: relative; display: block; padding: .5rem 0;
  font-family: var(--f-mono); font-size: .75rem; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase; color: var(--z-silver);
  transition: color var(--t-fast) var(--ease);
}
.nav__link::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px;
  background: var(--z-yellow); transform: scaleX(0); transform-origin: left;
  transition: transform var(--t-med) var(--ease);
}
.nav__link:hover, .nav__link.is-active { color: var(--z-white); }
.nav__link:hover::after, .nav__link.is-active::after { transform: scaleX(1); }

.nav-toggle { display: none; width: 48px; height: 48px; margin-right: -12px; position: relative; }
.nav-toggle span {
  position: absolute; left: 12px; right: 12px; height: 2px; background: var(--z-white);
  transition: transform var(--t-med) var(--ease), opacity var(--t-fast);
}
.nav-toggle span:nth-child(1) { top: 17px; }
.nav-toggle span:nth-child(2) { top: 23px; width: 60%; background: var(--z-red); }
.nav-toggle span:nth-child(3) { top: 29px; }
.nav-open .nav-toggle span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .nav {
    position: fixed; inset: 0; z-index: -1;
    flex-direction: column; align-items: stretch; justify-content: center; gap: var(--s-6);
    padding: calc(var(--header-h) + var(--s-5)) var(--gutter) var(--s-7);
    background: #080808;
    opacity: 0; visibility: hidden;
    transition: opacity var(--t-med) var(--ease), visibility var(--t-med);
  }
  .nav-open .nav { opacity: 1; visibility: visible; }
  .nav__list { flex-direction: column; gap: 0; }
  .nav__link {
    padding: 1.05rem 0; border-bottom: 1px solid var(--z-line);
    font-family: var(--f-display); font-stretch: 112%; font-weight: 600;
    font-size: 1.5rem; letter-spacing: .02em; text-transform: none; color: var(--z-white);
  }
  .nav__link::after { display: none; }
  .nav .btn { width: 100%; }
  .site-header.nav-open { background: #080808; -webkit-backdrop-filter: none; backdrop-filter: none; }
}

/* ---- Footer ---- */
.site-footer { border-top: 1px solid var(--z-line); padding-block: var(--s-7) var(--s-6); position: relative; }
.footer__grid { display: grid; gap: var(--s-7); grid-template-columns: 1.4fr 1fr 1fr; align-items: start; }
.footer__brand .logo-crop { width: min(300px, 100%); margin-bottom: var(--s-4); }
.footer__brand p { color: var(--z-dim); font-size: .95rem; max-width: 40ch; }
.footer__col h3 { color: var(--z-dim); margin-bottom: var(--s-4); }
.footer__col a, .footer__col span { display: block; padding: .3rem 0; color: var(--z-silver); font-size: .95rem; }
.footer__col a:hover { color: var(--z-yellow); }
.footer__bottom {
  margin-top: var(--s-7); padding-top: var(--s-5); border-top: 1px solid var(--z-line);
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--s-3);
  color: var(--z-dim);
}
@media (max-width: 760px) { .footer__grid { grid-template-columns: 1fr; gap: var(--s-6); } }

/* ---- Revelado al hacer scroll (solo si hay JS) ---- */
.js [data-reveal] {
  opacity: 0; transform: translateY(18px);
  transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease);
  transition-delay: calc(var(--i, 0) * 70ms);
}
.js [data-reveal].is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-delay: 0ms !important; transition-duration: .001ms !important; transition-delay: 0ms !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
}