/* =====================================================================
   404 DESIGN STUDIO — Componentes: nav, cursor, botones, HUD, marquee
   ===================================================================== */

/* ------------------------------- Cursor ------------------------------- */
/* Nave espacial: el morro (x=0) coincide con el puntero real.
   El contenedor es un ancla de tamaño 0; la nave y las llamas se posicionan
   en absoluto respecto a ese punto. Así las llamas quedan SIEMPRE bajo la cola. */
.cursor-ship {
  --cursor-scale: 1;
  --thrust: 1;
  position: fixed;
  top: 0; left: 0;
  width: 0; height: 0;
  z-index: var(--z-cursor);
  pointer-events: none;
  transform-origin: 0 0;
  will-change: transform;
}
.cursor-ship__inner {
  position: absolute;
  top: 0; left: 0;
  width: 0; height: 0;
  transform: scale(var(--cursor-scale));
  transform-origin: 0 0;
  transition: transform .28s var(--ease-out);
}
.cursor-ship__body {
  position: absolute;
  left: -17px; top: 0;      /* centra la nave sobre el puntero */
  width: 34px; height: 49px;
  max-width: none;          /* evita el colapso por `svg{max-width:100%}` en caja 0×0 */
  filter: drop-shadow(0 5px 12px rgba(0, 0, 0, .55));
}
.cursor-ship.is-hover { --cursor-scale: 1.16; }
.cursor-ship.is-accent { --cursor-scale: 1.26; }

/* Llamas azules: nacen en la cola (y≈41) y caen hacia abajo */
.cursor-ship__flame {
  position: absolute;
  left: 0;                  /* centrada en el eje del puntero */
  top: 40px;                /* justo debajo de la cola */
  width: 0; height: 0;
  transform: scaleY(var(--thrust));
  transform-origin: top center;
  transition: transform .12s var(--ease-out);
}
.cursor-ship__flame i {
  position: absolute;
  left: 50%;
  top: 0;
  transform-origin: center top;
  border-radius: 50% 50% 50% 50% / 75% 75% 25% 25%;
  background: linear-gradient(to bottom,
    rgba(210, 252, 255, .98),
    rgba(0, 229, 255, .85) 30%,
    rgba(0, 150, 255, .45) 65%,
    rgba(0, 120, 255, 0) 100%);
  filter: blur(.3px);
}
.cursor-ship__flame i:nth-child(1) {
  width: 14px; height: 30px; margin-left: -7px;
  opacity: .5;
  animation: flame 180ms var(--ease-soft) infinite alternate;
}
.cursor-ship__flame i:nth-child(2) {
  width: 9px; height: 22px; margin-left: -4.5px;
  animation: flame 130ms var(--ease-soft) infinite alternate;
}
.cursor-ship__flame i:nth-child(3) {
  width: 5px; height: 14px; margin-left: -2.5px;
  background: linear-gradient(to bottom, #ffffff, #9be9ff 55%, rgba(0, 229, 255, 0));
  animation: flame 100ms var(--ease-soft) infinite alternate;
}
@keyframes flame {
  from { transform: scaleY(.70) scaleX(.90); }
  to   { transform: scaleY(1.15) scaleX(1.08); }
}

@media (hover: none), (pointer: coarse), (max-width: 900px) {
  .cursor-ship { display: none !important; }
}
body.has-custom-cursor,
body.has-custom-cursor a,
body.has-custom-cursor button { cursor: none; }

/* ------------------------------ Header ------------------------------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: var(--z-header);
  transition: background-color var(--dur) var(--ease-out),
              border-color var(--dur) var(--ease-out),
              backdrop-filter var(--dur) var(--ease-out);
  border-bottom: 1px solid transparent;
}
.header::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(5,5,5,.72), transparent);
  opacity: 1;
  transition: opacity var(--dur) var(--ease-out);
  z-index: -1;
  pointer-events: none;
}
.header.is-scrolled {
  background: rgba(5, 5, 5, .72);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom-color: var(--line);
}
.header.is-scrolled::after { opacity: 0; }

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s5);
  height: clamp(64px, 5.5vw, 84px);
}

/* Marca / logo tipográfico */
.brand {
  display: inline-flex;
  align-items: baseline;
  gap: .7rem;
  font-weight: 600;
  letter-spacing: -.03em;
  font-size: clamp(1.5rem, 1.1rem + 1.5vw, 2.05rem);
  color: var(--ink);
  line-height: 1;
}
.brand__mark {
  font-variant-numeric: tabular-nums;
  letter-spacing: -.04em;
}
.brand__mark span { color: var(--accent); }
.brand__sub {
  font-family: var(--font-mono);
  font-size: clamp(.68rem, .6rem + .3vw, .82rem);
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
@media (max-width: 620px) { .brand__sub { display: none; } }

/* Navegación primaria */
.nav { display: flex; align-items: center; gap: clamp(1rem, 2.4vw, 2.6rem); }
.nav__link {
  position: relative;
  font-family: var(--font-mono);
  font-size: var(--t-label);
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-dim);
  padding: .4rem 0;
  transition: color var(--dur-fast) var(--ease-out);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform var(--dur) var(--ease-out);
}
.nav__link:hover,
.nav__link:focus-visible { color: var(--ink); }
.nav__link:hover::after,
.nav__link:focus-visible::after { transform: scaleX(1); transform-origin: left center; }

@media (max-width: 900px) { .nav { display: none; } }

/* Botón menú móvil */
.menu-toggle {
  display: none;
  position: relative;
  width: 44px; height: 44px;
  margin-right: -8px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.menu-toggle span {
  display: block;
  width: 22px; height: 1px;
  background: var(--ink);
  transition: transform var(--dur) var(--ease-out), opacity var(--dur) var(--ease-out);
}
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(3.5px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { transform: translateY(-3.5px) rotate(-45deg); }
@media (max-width: 900px) { .menu-toggle { display: flex; } }

/* Panel móvil */
.menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  background: rgba(5, 5, 5, .96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--gutter) var(--gutter) calc(var(--gutter) + 2rem);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-slow) var(--ease-out), visibility var(--dur-slow);
}
.menu.is-open { opacity: 1; visibility: visible; }
.menu__list { display: flex; flex-direction: column; gap: .2rem; border-top: 1px solid var(--line); }
.menu__item { border-bottom: 1px solid var(--line); }
.menu__link {
  display: flex;
  align-items: baseline;
  gap: var(--s4);
  padding: var(--s5) 0;
  font-size: clamp(2rem, 9vw, 3.4rem);
  font-weight: 450;
  letter-spacing: -.04em;
  color: var(--ink);
  transition: color var(--dur-fast) var(--ease-out), transform var(--dur) var(--ease-out);
}
.menu__link:hover { color: var(--accent); transform: translateX(var(--s4)); }
.menu__num { font-family: var(--font-mono); font-size: var(--t-label); letter-spacing: .2em; color: var(--ink-faint); }
.menu__foot {
  margin-top: var(--s8);
  display: flex;
  flex-wrap: wrap;
  gap: var(--s5);
  font-family: var(--font-mono);
  font-size: var(--t-label);
  letter-spacing: .02em;
  color: var(--ink-faint);
}
.menu__foot a:hover { color: var(--accent); }

/* ------------------------------ Botones ------------------------------ */
.btn {
  --btn-bg: transparent;
  --btn-fg: var(--ink);
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: .8rem;
  padding: 1.05rem 1.8rem;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: var(--t-small);
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  overflow: hidden;
  isolation: isolate;
  transition: border-color .15s var(--ease-out), color .15s var(--ease-out),
              transform .12s var(--ease-out);
}
.btn__label { position: relative; z-index: 2; display: inline-flex; align-items: center; gap: .8rem; }
.btn__arrow { transition: transform .2s var(--ease-out); }
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: var(--accent);
  transform: translateY(101%);
  transition: transform .22s var(--ease-out);
}
/* Foco de teclado — siempre activo */
.btn:focus-visible { color: #001318; border-color: var(--accent); }
.btn:focus-visible::before { transform: translateY(0); }
.btn:focus-visible .btn__arrow { transform: translateX(5px); }

/* Presión — feedback en cualquier puntero */
.btn:active { transform: scale(.98); }

.btn--solid { --btn-bg: var(--ink); --btn-fg: #050505; border-color: var(--ink); }

/* CTA principal — rol de etiqueta enmascarado sobre el relleno de acento.
   Transform/opacity, ease-out, ≤220ms; retargetea por ser transition. */
.btn--roll .btn__label { display: block; overflow: hidden; }
.btn__line { display: flex; align-items: center; gap: .8rem; transition: transform .22s var(--ease-out); }
.btn__line + .btn__line { position: absolute; inset: 0; transform: translateY(100%); }
.btn--roll:focus-visible .btn__line { transform: translateY(-100%); }
.btn--roll:focus-visible .btn__line + .btn__line { transform: translateY(0); }

/* Hover solo con puntero fino (evita el hover pegado en táctil) */
@media (hover: hover) and (pointer: fine) {
  .btn:hover { color: #001318; border-color: var(--accent); }
  .btn:hover::before { transform: translateY(0); }
  .btn:hover .btn__arrow { transform: translateX(5px); }
  .btn--solid:hover { border-color: var(--accent); }
  .btn--roll:hover .btn__line { transform: translateY(-100%); }
  .btn--roll:hover .btn__line + .btn__line { transform: translateY(0); }
}

.btn--ghost { border-color: var(--line); padding: 1.05rem 0; border: 0; }
.btn--ghost::before { display: none; }
.btn--ghost:hover { color: var(--accent); border-color: transparent; }

/* Enlace de texto con subrayado que barre */
.link-sweep {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-mono);
  font-size: var(--t-label);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  padding-bottom: .35rem;
}
.link-sweep::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform var(--dur) var(--ease-out);
}
.link-sweep:hover { color: var(--accent); }
.link-sweep:hover::after { transform: scaleX(1); transform-origin: left center; }

/* ------------------------- HUD de sistema ---------------------------- */
/* Pequeños indicadores técnicos distribuidos en las secciones */
.hud {
  position: absolute;
  font-family: var(--font-mono);
  font-size: var(--t-micro);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  pointer-events: none;
  z-index: var(--z-content);
}
.hud--tr { top: var(--s5); right: var(--gutter); }
.hud--tl { top: var(--s5); left: var(--gutter); }
.hud--bl { bottom: var(--s5); left: var(--gutter); }
.hud--br { bottom: var(--s5); right: var(--gutter); }
.hud b { color: var(--ink-dim); font-weight: 500; }

/* Barra de progreso de scroll (hilo de acento, arriba) */
.scroll-progress {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: calc(var(--z-header) + 1);
  height: 1px;
  width: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
}

/* Carrusel de disciplinas (auto-scroll infinito, solo transform) */
.marquee {
  position: relative;
  overflow: hidden;
  border-block: 1px solid var(--line);
  padding-block: clamp(1rem, 2vw, 1.6rem);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 7%, #000 93%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 7%, #000 93%, transparent);
}
.marquee__track {
  display: inline-flex;
  align-items: center;
  gap: clamp(2rem, 5vw, 4rem);
  padding-right: clamp(2rem, 5vw, 4rem);
  animation: marquee 42s linear infinite;
  will-change: transform;
}
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__item {
  display: inline-flex;
  align-items: center;
  gap: clamp(2rem, 5vw, 4rem);
  font-size: clamp(1rem, 1.6vw, 1.5rem);
  font-weight: 450;
  letter-spacing: -.02em;
  color: var(--ink-dim);
  white-space: nowrap;
}
.marquee__item::after {
  content: "";
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
}
.marquee__item em { font-style: normal; color: var(--ink); }
@keyframes marquee { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) {
  .marquee__track { animation: none; }
}

/* Nebulosas de fondo (cian -> magenta), deriva lenta. Detrás del contenido. */
.nebula {
  position: fixed;
  inset: -12%;
  z-index: var(--z-nebula);
  pointer-events: none;
  overflow: hidden;
}
.nebula::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 78% 78% at 50% 44%, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, .6) 100%);
}
.nebula span {
  position: absolute;
  display: block;
  border-radius: 50%;
  filter: blur(80px);
  will-change: transform;
}
.nebula span:nth-child(1) {
  width: 70vmax; height: 70vmax;
  left: -14%; top: -20%;
  background: radial-gradient(circle, rgba(0, 229, 255, .22) 0%, rgba(0, 229, 255, 0) 62%);
  animation: nebula-a 22s var(--ease-inout) -3s infinite;
}
.nebula span:nth-child(2) {
  width: 64vmax; height: 64vmax;
  right: -18%; top: 4%;
  background: radial-gradient(circle, rgba(255, 79, 216, .18) 0%, rgba(255, 79, 216, 0) 62%);
  animation: nebula-b 27s var(--ease-inout) -9s infinite;
}
.nebula span:nth-child(3) {
  width: 88vmax; height: 88vmax;
  left: 4%; bottom: -30%;
  background: linear-gradient(90deg, rgba(0, 229, 255, .16), rgba(0, 0, 0, .82) 50%, rgba(255, 79, 216, .16));
  animation: nebula-c 31s var(--ease-inout) -14s infinite;
}
.nebula span:nth-child(4) {
  width: 62vmax; height: 62vmax;
  left: 30%; top: 26%;
  background: radial-gradient(circle, rgba(0, 0, 0, .85) 0%, rgba(0, 0, 0, 0) 70%);
  animation: nebula-d 18s var(--ease-inout) -6s infinite;
}
@keyframes nebula-a {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  22%  { transform: translate3d(15%, -9%, 0) scale(1.14); }
  47%  { transform: translate3d(-7%, 13%, 0) scale(1.04); }
  73%  { transform: translate3d(19%, 5%, 0) scale(1.2); }
  100% { transform: translate3d(0, 0, 0) scale(1); }
}
@keyframes nebula-b {
  0%   { transform: translate3d(0, 0, 0) scale(1.08); }
  25%  { transform: translate3d(-18%, 8%, 0) scale(1); }
  50%  { transform: translate3d(6%, 15%, 0) scale(1.16); }
  75%  { transform: translate3d(-12%, -6%, 0) scale(1.05); }
  100% { transform: translate3d(0, 0, 0) scale(1.08); }
}
@keyframes nebula-c {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  20%  { transform: translate3d(-10%, 12%, 0) scale(1.12); }
  55%  { transform: translate3d(17%, -8%, 0) scale(1.02); }
  80%  { transform: translate3d(-6%, 9%, 0) scale(1.16); }
  100% { transform: translate3d(0, 0, 0) scale(1); }
}
@keyframes nebula-d {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  30%  { transform: translate3d(13%, 10%, 0) scale(1.12); }
  60%  { transform: translate3d(-14%, -9%, 0) scale(1); }
  100% { transform: translate3d(0, 0, 0) scale(1); }
}
@media (prefers-reduced-motion: reduce) {
  .nebula span { animation: none; }
}

/* Fondo ambiental: partículas en canvas */
.particles {
  position: fixed;
  inset: 0;
  z-index: var(--z-under);
  pointer-events: none;
  opacity: .55;
}
/* Retícula técnica muy tenue */
.grid-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-under);
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size: clamp(80px, 9vw, 150px) clamp(80px, 9vw, 150px);
  -webkit-mask-image: radial-gradient(ellipse 120% 80% at 50% 0%, #000 0%, transparent 75%);
  mask-image: radial-gradient(ellipse 120% 80% at 50% 0%, #000 0%, transparent 75%);
  opacity: .35;
}

/* Indicador de disponibilidad (footer / hero) */
.status {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-mono);
  font-size: var(--t-micro);
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.status__dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

/* --------------------- Botón flotante de WhatsApp -------------------- */
/* Entrada única (ease-out) + onda de atención continua y sobria; hover/press
   por transform. Nunca anima propiedades de layout. */
.fab {
  position: fixed;
  right: clamp(1rem, 2.4vw, 2rem);
  bottom: calc(clamp(1rem, 2.4vw, 2rem) + env(safe-area-inset-bottom, 0px));
  z-index: var(--z-fab);
  width: 56px;
  height: 56px;
  border-radius: 999px;
  animation: fab-in .5s var(--ease-out) .55s both;
}
/* Onda de atención: anillo que se expande y desvanece (detrás del botón) */
.fab::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: 999px;
  border: 2px solid #25D366;
  opacity: 0;
  pointer-events: none;
  animation: fab-ripple 3s var(--ease-out) 1.6s infinite;
}
.fab__inner {
  position: relative;
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line);
  color: #25D366;
  overflow: hidden;
  isolation: isolate;
  box-shadow: 0 14px 34px -14px rgba(0, 0, 0, .72);
  transition: transform .15s var(--ease-out), border-color .15s var(--ease-out),
              color .15s var(--ease-out);
}
.fab__inner::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: #25D366;
  transform: translateY(101%);
  transition: transform .2s var(--ease-out);
}
.fab__icon { position: relative; z-index: 1; display: block; width: 27px; height: 27px; }
.fab:active .fab__inner { transform: scale(.94); }

@media (hover: hover) and (pointer: fine) {
  .fab:hover .fab__inner {
    transform: scale(1.05);
    color: #ffffff;
    border-color: #25D366;
  }
  .fab:hover .fab__inner::before { transform: translateY(0); }
}

@keyframes fab-in {
  from { opacity: 0; transform: translateY(18px) scale(.9); }
  to   { opacity: 1; transform: none; }
}
@keyframes fab-ripple {
  0%   { transform: scale(1);    opacity: .55; }
  60%  { transform: scale(1.7);  opacity: 0; }
  100% { transform: scale(1.7);  opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .fab, .fab::after { animation: none; }
}