/* ============================================================
   PluriSwap — styles
   Paleta: navy profundo + plasma mint + ámbar (fiat)
   ============================================================ */

:root {
  --bg: #05080d;
  --bg-2: #0a1019;
  --bg-3: #0e1622;
  --ink: #eaf6f3;
  --ink-dim: #8fa3b8;
  --ink-faint: #55697e;
  --line: rgba(78, 240, 208, 0.14);
  --accent: #4ef0d0;
  --accent-soft: rgba(78, 240, 208, 0.12);
  --accent-warm: #ffb347;
  --font-display: "Clash Display", "Avenir Next", sans-serif;
  --font-body: "General Sans", "Avenir Next", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --container: 1180px;
  --radius: 14px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

::selection { background: var(--accent); color: #04211c; }

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

a { color: inherit; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--accent);
  color: #04211c;
  padding: 0.6rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.skip-link:focus { left: 1rem; top: 1rem; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Nav ---------- */

.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(5, 8, 13, 0.55);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.nav.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(5, 8, 13, 0.82);
}

.nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: 0.01em;
  text-decoration: none;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  font-size: 0.92rem;
  color: var(--ink-dim);
}
.nav__links a {
  text-decoration: none;
  transition: color 0.2s ease;
}
.nav__links a:hover { color: var(--ink); }

.nav__github {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.42rem 0.95rem;
  color: var(--ink) !important;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.nav__github:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background:
    radial-gradient(1200px 700px at 75% 40%, rgba(78, 240, 208, 0.07), transparent 60%),
    var(--bg);
}

.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* Fallback 2D (reduced motion / sin WebGL) */
.hero__fallback {
  position: absolute;
  inset: 0;
  display: none;
  place-items: center;
  pointer-events: none;
}
.hero.no-3d .hero__fallback { display: grid; }
.hero.no-3d .hero__canvas { display: none; }

.hero__fallback-core {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(78, 240, 208, 0.5), rgba(78, 240, 208, 0.06) 70%);
  box-shadow: 0 0 80px rgba(78, 240, 208, 0.35);
}
.hero__fallback-ring {
  position: absolute;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  border: 1px solid var(--line);
  animation: ring-spin 24s linear infinite;
}
.hero__fallback-ring--2 {
  width: 520px;
  height: 520px;
  animation-duration: 40s;
  animation-direction: reverse;
  border-color: rgba(255, 179, 71, 0.14);
}
.hero__fallback-ring::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 50%;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}
@keyframes ring-spin { to { transform: rotate(360deg); } }

.hero__vignette {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, var(--bg) 0%, rgba(5, 8, 13, 0.55) 38%, transparent 65%),
    linear-gradient(0deg, var(--bg) 0%, transparent 22%);
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: var(--container);
  margin: 0 auto;
  padding: 8.5rem 1.5rem 4rem;
  width: 100%;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.45rem 1rem;
  background: rgba(5, 8, 13, 0.4);
}
.hero__eyebrow .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.75); }
}

.hero__title {
  margin-top: 1.6rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.6rem, 6.2vw, 5rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  max-width: 14ch;
}
.hero__title em {
  font-style: normal;
  color: var(--accent);
}

.hero__sub {
  margin-top: 1.5rem;
  max-width: 54ch;
  color: var(--ink-dim);
  font-size: clamp(1rem, 1.4vw, 1.15rem);
}
.hero__sub strong { color: var(--ink); font-weight: 600; }

.hero__cta {
  margin-top: 2.2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.hero__meta {
  margin-top: 3rem;
  display: flex;
  gap: 2.8rem;
  max-width: 560px;
}
.hero__meta div { display: grid; gap: 0.15rem; }
.hero__meta dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.hero__meta dd {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 500;
  color: var(--ink);
}

.hero__scroll {
  position: absolute;
  bottom: 1.6rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  width: 26px;
  height: 42px;
  border: 1.5px solid var(--ink-faint);
  border-radius: 999px;
  display: grid;
  place-items: start center;
  padding-top: 8px;
  opacity: 0.7;
  transition: opacity 0.2s ease, border-color 0.2s ease;
}
.hero__scroll:hover { opacity: 1; border-color: var(--accent); }
.hero__scroll span {
  width: 3px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
  animation: scroll-hint 1.8s ease-in-out infinite;
}
@keyframes scroll-hint {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(12px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* ---------- Botones ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1rem;
  text-decoration: none;
  border-radius: 999px;
  padding: 0.85rem 1.9rem;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.btn:active { transform: translateY(1px) scale(0.99); }

.btn--primary {
  background: var(--accent);
  color: #04211c;
  box-shadow: 0 0 0 rgba(78, 240, 208, 0);
}
.btn--primary:hover {
  box-shadow: 0 6px 30px rgba(78, 240, 208, 0.35);
  transform: translateY(-2px);
}

.btn--ghost {
  border: 1px solid var(--line);
  color: var(--ink);
  background: transparent;
}
.btn--ghost:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-2px);
}

/* ---------- Marquee ---------- */

.marquee {
  border-block: 1px solid var(--line);
  background: var(--bg-2);
  overflow: hidden;
  padding: 1.05rem 0;
  position: relative;
}
.marquee::before,
.marquee::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 120px;
  z-index: 2;
  pointer-events: none;
}
.marquee::before { left: 0; background: linear-gradient(90deg, var(--bg-2), transparent); }
.marquee::after { right: 0; background: linear-gradient(-90deg, var(--bg-2), transparent); }

.marquee__track {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  width: max-content;
  animation: marquee 36s linear infinite;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
  white-space: nowrap;
}
.marquee__track i {
  font-style: normal;
  color: var(--accent);
  opacity: 0.6;
}
@keyframes marquee { to { transform: translateX(calc(-50% - 0.7rem)); } }

/* ---------- Secciones ---------- */

.section {
  max-width: var(--container);
  margin: 0 auto;
  padding: 7rem 1.5rem;
}
.section--alt {
  max-width: none;
  background: var(--bg-2);
  border-block: 1px solid var(--line);
}
.section--alt > * {
  max-width: var(--container);
  margin-inline: auto;
}

.section__head {
  max-width: 640px;
  margin-bottom: 3.5rem;
}

.kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.9rem;
}

.section__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.9rem, 3.6vw, 2.9rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
}

/* ---------- Pasos ---------- */

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
  margin-bottom: 5rem;
}

.step {
  position: relative;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
}
.step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 42px;
  height: 1px;
  background: var(--accent);
}
.step__num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.15em;
}
.step h3 {
  margin-top: 0.7rem;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
}
.step p {
  margin-top: 0.6rem;
  color: var(--ink-dim);
  font-size: 0.98rem;
}

/* ---------- Diagrama ---------- */

.diagram {
  background: var(--bg-3);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem 1.5rem 1.4rem;
  overflow-x: auto;
}
.diagram svg {
  width: 100%;
  min-width: 640px;
  height: auto;
}
.diagram figcaption {
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-faint);
  text-align: center;
}

/* ---------- Beneficios ---------- */

.benefits {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.benefit {
  background: var(--bg-2);
  padding: 2.2rem 2rem 2.4rem;
  transition: background 0.25s ease;
}
.benefit:hover { background: var(--bg-3); }

.benefit__icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  border: 1px solid var(--line);
  color: var(--accent);
  background: var(--accent-soft);
  margin-bottom: 1.3rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.benefit:hover .benefit__icon {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(78, 240, 208, 0.18);
}
.benefit__icon svg { width: 24px; height: 24px; }

.benefit h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.benefit p {
  color: var(--ink-dim);
  font-size: 0.97rem;
}

/* ---------- Núcleo ---------- */

.nucleo {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 4rem;
  align-items: center;
}

.nucleo__lead {
  margin-top: 1.2rem;
  color: var(--ink-dim);
  font-size: 1.08rem;
  max-width: 52ch;
}
.nucleo__lead strong { color: var(--ink); }

.nucleo__list {
  margin-top: 1.8rem;
  list-style: none;
  display: grid;
  gap: 0.9rem;
}
.nucleo__list li {
  display: flex;
  gap: 0.8rem;
  color: var(--ink-dim);
}
.nucleo__check { color: var(--accent); font-family: var(--font-mono); }

.nucleo__card {
  background: var(--bg-3);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}
.nucleo__card::before {
  content: "";
  display: block;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-warm));
}
.code {
  padding: 1.6rem 1.6rem 1.8rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--ink-dim);
  overflow-x: auto;
}
.code .c-hub { color: var(--accent); }
.code .c-warm { color: var(--accent-warm); }
.code .c-cmt { color: var(--ink-faint); }

/* ---------- CTA final ---------- */

.cta {
  border-top: 1px solid var(--line);
  background:
    radial-gradient(900px 400px at 50% 120%, rgba(78, 240, 208, 0.1), transparent 70%),
    var(--bg);
  text-align: center;
  padding: 7.5rem 1.5rem;
}
.cta__inner { max-width: 680px; margin: 0 auto; }

.cta__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  letter-spacing: -0.02em;
}
.cta__sub {
  margin-top: 1.2rem;
  color: var(--ink-dim);
  font-size: 1.1rem;
}
.cta__actions {
  margin-top: 2.4rem;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.9rem;
}

/* ---------- Footer ---------- */

.footer {
  border-top: 1px solid var(--line);
  background: var(--bg-2);
}
.footer__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 2.2rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
}
.footer__brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-weight: 600;
}
.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
  font-size: 0.9rem;
  color: var(--ink-dim);
}
.footer__links a { text-decoration: none; transition: color 0.2s ease; }
.footer__links a:hover { color: var(--accent); }
.footer__legal {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-faint);
}

/* ---------- Reveal on scroll ---------- */

.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease var(--d, 0s), transform 0.7s ease var(--d, 0s);
}
.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .steps { grid-template-columns: 1fr; gap: 2rem; }
  .benefits { grid-template-columns: repeat(2, 1fr); }
  .nucleo { grid-template-columns: 1fr; gap: 2.5rem; }
  .nav__links a:not(.nav__github) { display: none; }
}

@media (max-width: 600px) {
  .benefits { grid-template-columns: 1fr; }
  .hero__content { padding-top: 7rem; }
  .hero__meta { gap: 1.6rem; flex-wrap: wrap; }
  .section { padding: 4.5rem 1.25rem; }
  .hero__scroll { display: none; }
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .marquee__track { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero__eyebrow .dot,
  .hero__scroll span,
  .hero__fallback-ring { animation: none; }
  .diagram svg circle[animateMotion] { display: none; }
}