/* ============================================================
   TERRA OCULTA: STRATA — landing
   Paleta tomada literalmente de web/src/core/palette.js
   ============================================================ */

:root {
  /* fondos */
  --abyss:        #0e1418;
  --night-sky:    #1a2028;
  --shadow-soil:  #1a1410;
  --deep-earth:   #2b2018;
  --cold-stone:   #2a333e;
  /* piedra / acero */
  --steel:        #3e4a56;
  --dusk-grey:    #556470;
  --mist:         #6e7d88;
  --pale-mist:    #8a97a0;
  --cold-light:   #a8b3ba;
  /* texto */
  --bone:         #e8dcc0;
  --parchment:    #d0c0a0;
  --aged-paper:   #b8a080;
  --old-wood:     #9a8460;
  /* acentos cálidos */
  --blood-shadow: #5a1810;
  --rust:         #9a3820;
  --ember:        #b85028;
  --flame:        #d87040;
  --fire-orange:  #ff7020;
  --white-hot:    #ffe880;
  --healing-gold: #f8d878;
  /* vegetación */
  --forest-green: #506548;
  --sage:         #8ca078;
  --pale-lichen:  #a8bc94;
  /* wrongness */
  --wrongness-glow: #4a9684;
  --jade:         #6ac4a8;

  --font-body: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Mono", Consolas, "Courier New", monospace;

  --wrap: 1120px;
  --ease-out: cubic-bezier(.16, 1, .3, 1);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  scroll-behavior: smooth;
  background: var(--abyss);
}

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--parchment);
  background: var(--abyss);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }

a { color: inherit; }

ul[role="list"], ol[role="list"] { list-style: none; padding: 0; }

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

.wrap {
  width: min(100% - 3rem, var(--wrap));
  margin-inline: auto;
}

/* ---------- accesibilidad ---------- */
.skip-link {
  position: absolute;
  top: -4rem;
  left: 1rem;
  z-index: 100;
  padding: .6rem 1rem;
  background: var(--bone);
  color: var(--abyss);
  font-family: var(--font-mono);
  font-size: .8rem;
  text-decoration: none;
  transition: top .2s var(--ease-out);
}
.skip-link:focus-visible { top: .75rem; }

/* ---------- tipografía común ---------- */
.kicker {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .22em;
  color: var(--flame);
  text-transform: uppercase;
}

.section__title {
  margin-top: .6rem;
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  font-weight: 800;
  letter-spacing: .04em;
  line-height: 1.1;
  color: var(--bone);
  text-shadow: 4px 4px 0 rgba(90, 24, 16, .55);
}

.section__lead {
  margin-top: 1rem;
  max-width: 62ch;
  color: var(--aged-paper);
}

.section__head { margin-bottom: clamp(2.5rem, 6vw, 4.5rem); }

/* ---------- botones ---------- */
.btn {
  display: inline-block;
  padding: 1rem 1.9rem;
  font-family: var(--font-mono);
  font-size: .92rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  text-decoration: none;
  border: 2px solid var(--bone);
  box-shadow: 5px 5px 0 rgba(0, 0, 0, .5);
  transition: transform .18s var(--ease-out), box-shadow .18s var(--ease-out),
              background-color .18s var(--ease-out), color .18s var(--ease-out);
}
.btn:hover  { transform: translate(-2px, -2px); box-shadow: 7px 7px 0 rgba(0, 0, 0, .55); }
.btn:active { transform: translate(2px, 2px);  box-shadow: 2px 2px 0 rgba(0, 0, 0, .55); }

.btn--primary {
  background: var(--rust);
  border-color: var(--flame);
  color: var(--white-hot);
}
.btn--primary:hover { background: var(--ember); }

.btn--ghost {
  background: transparent;
  border-color: var(--mist);
  color: var(--bone);
}
.btn--ghost:hover { border-color: var(--bone); background: rgba(232, 220, 192, .07); }

.btn--small { padding: .55rem 1.1rem; font-size: .8rem; box-shadow: 3px 3px 0 rgba(0,0,0,.5); }

/* ---------- nav ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  background: rgba(14, 20, 24, .86);
  backdrop-filter: blur(6px);
  border-bottom: 2px solid var(--deep-earth);
}
.nav::after {
  content: "";
  display: block;
  height: 4px;
  background: repeating-linear-gradient(90deg,
    var(--blood-shadow) 0 6px, transparent 6px 12px,
    var(--rust)        12px 18px, transparent 18px 30px);
}
.nav__inner {
  width: min(100% - 3rem, var(--wrap));
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: .8rem 0;
}
.nav__brand {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: .12em;
  color: var(--bone);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  white-space: nowrap;
}
.nav__brand-sub { color: var(--flame); }
.nav__sigil {
  width: 14px; height: 14px;
  background:
    linear-gradient(var(--sage) 0 33%, var(--steel) 33% 66%, var(--pale-mist) 66% 100%);
  box-shadow: 0 0 0 2px var(--abyss), 0 0 0 3px var(--old-wood);
}
.nav__links {
  display: flex;
  gap: 1.4rem;
  margin-left: auto;
}
.nav__links a {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--aged-paper);
  transition: color .15s var(--ease-out);
}
.nav__links a:hover { color: var(--white-hot); }

/* ---------- hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
}
.hero__bg {
  position: absolute;
  inset: -12% 0;
  z-index: -2;
}
.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  image-rendering: pixelated;
  will-change: transform;
}
.hero__veil {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 120% 90% at 50% 40%, transparent 55%, rgba(0, 0, 0, .55) 100%),
    linear-gradient(180deg,
      rgba(14, 20, 24, .62) 0%,
      rgba(14, 20, 24, .48) 38%,
      rgba(14, 20, 24, .86) 82%,
      var(--abyss) 100%);
}
/* scanlines muy sutiles */
.hero__veil::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(0deg,
    rgba(14, 20, 24, .22) 0 1px, transparent 1px 4px);
  pointer-events: none;
}

.hero__content {
  padding-top: 6rem;
  padding-bottom: 5rem;
}
.hero__title {
  margin-top: .9rem;
  font-size: clamp(3rem, 11vw, 8.5rem);
  font-weight: 900;
  line-height: .95;
  letter-spacing: .015em;
  color: var(--bone);
  text-shadow:
    6px 6px 0 var(--blood-shadow),
    0 0 64px rgba(255, 112, 32, .18);
}
.hero__sub {
  margin-top: 1.1rem;
  font-family: var(--font-mono);
  font-size: clamp(.95rem, 2.4vw, 1.3rem);
  letter-spacing: .12em;
  color: var(--healing-gold);
  text-transform: uppercase;
}
.hero__brief {
  margin-top: 1.4rem;
  max-width: 56ch;
  color: var(--parchment);
}
.hero__ctas {
  margin-top: 2.2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.hero__specs {
  margin-top: 2.6rem;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
}
.hero__specs li {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  padding: .45rem .8rem;
  color: var(--cold-light);
  background: rgba(26, 32, 40, .72);
  border: 2px solid var(--steel);
  box-shadow: 3px 3px 0 rgba(0, 0, 0, .45);
}
.hero__scroll {
  position: absolute;
  bottom: 1.4rem;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .3em;
  color: var(--old-wood);
  animation: bob 2.4s ease-in-out infinite;
}
@keyframes bob {
  0%, 100% { transform: translate(-50%, 0); }
  50%      { transform: translate(-50%, 7px); }
}

/* ---------- secciones ---------- */
.section {
  position: relative;
  padding: clamp(4.5rem, 10vw, 8rem) 0;
}
.section--soil {
  background:
    linear-gradient(180deg, var(--abyss) 0, var(--shadow-soil) 12rem, var(--shadow-soil) calc(100% - 12rem), var(--abyss) 100%);
}
.section--abyss { background: var(--abyss); }

.section--final {
  background:
    linear-gradient(180deg, var(--abyss), var(--blood-shadow) 340%);
  border-top: 2px solid var(--deep-earth);
  text-align: center;
}
.section--final .section__lead { margin-inline: auto; }
.section--final .hero__ctas { justify-content: center; }

/* divisor con patrón de píxeles */
.hr-pixels {
  border: 0;
  height: 6px;
  margin: clamp(2.5rem, 6vw, 4rem) 0;
  background: repeating-linear-gradient(90deg,
    var(--rust)         0 6px, transparent 6px 12px,
    var(--blood-shadow) 12px 18px, transparent 18px 30px);
  opacity: .8;
}

/* ---------- marco "chunk" para screenshots ---------- */
.frame-chunk {
  position: relative;
  border: 2px solid var(--steel);
  box-shadow:
    0 0 0 2px var(--abyss),
    0 0 0 4px var(--deep-earth),
    10px 10px 0 0 rgba(0, 0, 0, .4);
  background: var(--night-sky);
  overflow: hidden;
}
.frame-chunk::after {
  /* píxeles de esquina */
  content: "";
  position: absolute;
  inset: -8px;
  pointer-events: none;
  background:
    linear-gradient(var(--flame), var(--flame)) top    left   / 6px 6px,
    linear-gradient(var(--flame), var(--flame)) top    right  / 6px 6px,
    linear-gradient(var(--flame), var(--flame)) bottom left   / 6px 6px,
    linear-gradient(var(--flame), var(--flame)) bottom right  / 6px 6px;
  background-repeat: no-repeat;
}
.frame-chunk img {
  width: 100%;
  height: auto;
  image-rendering: pixelated;
}

/* ---------- El Descenso ---------- */
.act {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: clamp(1.8rem, 4vw, 3.5rem);
  align-items: center;
}
.act--flip .act__text { order: 2; }
.act--flip .act__shot { order: 1; }

.act__meta {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .2em;
  margin-bottom: .7rem;
}
.act__meta--surface { color: var(--sage); }
.act__meta--ww2     { color: var(--flame); }
.act__meta--greco   { color: var(--jade); }

.act__title {
  font-size: clamp(1.5rem, 3.2vw, 2.2rem);
  font-weight: 800;
  letter-spacing: .05em;
  color: var(--bone);
  margin-bottom: .9rem;
}
.act__text p:last-child { color: var(--aged-paper); }

/* ---------- Gameplay ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.4rem;
}
.card {
  position: relative;
  padding: 1.8rem 1.5rem 1.6rem;
  background: var(--shadow-soil);
  border: 2px solid var(--steel);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, .4);
  transition: transform .22s var(--ease-out), border-color .22s var(--ease-out);
}
.card::before {
  /* franja de peligro superior */
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 5px;
  background: repeating-linear-gradient(45deg,
    var(--blood-shadow) 0 8px, transparent 8px 16px);
  opacity: 0;
  transition: opacity .22s var(--ease-out);
}
.card:hover { transform: translateY(-5px); border-color: var(--ember); }
.card:hover::before { opacity: 1; }

.card__icon {
  width: 48px;
  height: 48px;
  image-rendering: pixelated;
  margin-bottom: 1.1rem;
}
.card__title {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: .12em;
  color: var(--healing-gold);
  margin-bottom: .6rem;
}
.card__body { font-size: .95rem; color: var(--aged-paper); }

/* ---------- Co-op ---------- */
.coop {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
.steps { display: grid; gap: 1.2rem; counter-reset: step; }
.step {
  padding: 1.2rem 1.3rem;
  background: var(--deep-earth);
  border: 2px solid var(--shadow-soil);
  border-left: 5px solid var(--rust);
  box-shadow: 5px 5px 0 rgba(0, 0, 0, .35);
}
.step__title {
  display: flex;
  align-items: center;
  gap: .8rem;
  font-size: .98rem;
  letter-spacing: .1em;
  color: var(--bone);
  margin-bottom: .45rem;
}
.step__num {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--flame);
  border: 2px solid var(--blood-shadow);
  padding: .15rem .4rem;
  background: var(--shadow-soil);
}
.step p { font-size: .95rem; color: var(--aged-paper); }

.console {
  border: 2px solid var(--steel);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, .45);
  background: var(--night-sky);
}
.console__bar {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .18em;
  padding: .6rem .9rem;
  color: var(--abyss);
  background: var(--dusk-grey);
  border-bottom: 2px solid var(--steel);
}
.console__body {
  padding: 1.2rem 1.1rem 1.3rem;
  font-family: var(--font-mono);
  font-size: .82rem;
  color: var(--pale-lichen);
  display: grid;
  gap: .55rem;
}
.console__code { display: flex; gap: .5rem; margin-top: .3rem; }
.slot {
  display: inline-grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--healing-gold);
  background: var(--cold-stone);
  border: 2px solid var(--old-wood);
  box-shadow: inset 0 0 0 2px var(--abyss), 3px 3px 0 rgba(0, 0, 0, .45);
}
.console__note { color: var(--mist); font-size: .72rem; }

/* ---------- Galería ---------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 1.8rem;
}
.gallery__item { overflow: hidden; }
.gallery__item img {
  transition: transform .45s var(--ease-out);
  will-change: transform;
}
.gallery__item:hover img { transform: scale(1.06); }
.gallery__item figcaption {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .18em;
  padding: .6rem .8rem;
  color: var(--pale-mist);
  background: var(--shadow-soil);
  border-top: 2px solid var(--deep-earth);
}

/* ---------- footer ---------- */
.footer {
  border-top: 2px solid var(--deep-earth);
  background: var(--shadow-soil);
  padding: 3rem 0 2.6rem;
  text-align: center;
}
.footer::before {
  content: "";
  display: block;
  height: 6px;
  margin: -3rem auto 3rem;
  width: min(100% - 3rem, var(--wrap));
  background: repeating-linear-gradient(90deg,
    var(--rust) 0 6px, transparent 6px 12px,
    var(--blood-shadow) 12px 18px, transparent 18px 30px);
}
.footer__brand {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--bone);
}
.footer__line { margin-top: .5rem; color: var(--old-wood); font-size: .92rem; }
.footer__legal { margin-top: 1.4rem; color: var(--aged-paper); font-size: .92rem; }
.footer__legal strong { color: var(--parchment); font-weight: 700; }
.footer__flavor {
  margin-top: 1.4rem;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .2em;
  color: var(--rust);
}

/* ---------- scroll reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition:
    opacity .75s var(--ease-out),
    transform .75s var(--ease-out);
  transition-delay: calc(var(--d, 0) * 95ms);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .coop { grid-template-columns: 1fr; }
}
@media (max-width: 820px) {
  .act, .act--flip { grid-template-columns: 1fr; }
  .act--flip .act__text { order: 1; }
  .act--flip .act__shot { order: 2; }
}
@media (max-width: 720px) {
  .nav__links { display: none; }
  .nav__inner { justify-content: space-between; }
  .hero__content { padding-top: 7.5rem; }
}

/* ---------- movimiento reducido ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .hero__bg img { transform: none !important; }
}