/* Tema oscuro futurista, mobile-first. Cambiá la marca en :root (colores, radio, fuente). */
:root {
  --bg: #07080d; --surface: rgba(255, 255, 255, .04); --surface-strong: rgba(255, 255, 255, .07);
  --border: rgba(255, 255, 255, .09); --text: #eef1f8; --muted: #9aa3b8;
  --c1: #22d3ee; --c2: #8b5cf6; --c3: #ec4899;
  --gradient: linear-gradient(110deg, var(--c1), var(--c2) 45%, var(--c3));
  --radius: 18px; --space: clamp(1rem, 3vw, 1.75rem); --max: 1160px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: dark;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: var(--font); line-height: 1.6; color: var(--text); background: var(--bg); overflow-x: hidden; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--c1); }
:focus-visible { outline: 2px solid var(--c1); outline-offset: 3px; border-radius: 6px; }
.container { width: min(100% - 2 * var(--space), var(--max)); margin-inline: auto; }
.muted { color: var(--muted); }
.skip-link { position: absolute; left: -999px; }
.skip-link:focus { left: 1rem; top: 1rem; background: var(--bg); padding: .5rem 1rem; z-index: 20; }

/* Fondo: auroras que se mueven lento + grilla */
.bg { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
/* degradados radiales en vez de filter: blur (mucho más livianos de dibujar, sobre todo en celulares) */
.orb { position: absolute; width: 70vmax; height: 70vmax; border-radius: 50%; opacity: .5; animation: drift 22s ease-in-out infinite alternate; will-change: transform; }
.orb-1 { background: radial-gradient(circle, var(--c2) 0, transparent 65%); top: -32vmax; left: -22vmax; }
.orb-2 { background: radial-gradient(circle, var(--c1) 0, transparent 65%); top: 5vmax; right: -32vmax; opacity: .3; animation-duration: 28s; }
.orb-3 { background: radial-gradient(circle, var(--c3) 0, transparent 65%); bottom: -42vmax; left: 15vmax; opacity: .28; animation-duration: 34s; }
.grid-lines { position: absolute; inset: 0; background-image: linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px); background-size: 64px 64px; mask-image: radial-gradient(ellipse at 50% 0%, #000 20%, transparent 70%); opacity: .5; }
@keyframes drift { to { transform: translate(8vmax, 6vmax) scale(1.15); } }

/* Header de vidrio */
.site-header { position: sticky; top: 0; z-index: 10; background: rgba(7, 8, 13, .55); backdrop-filter: blur(14px) saturate(140%); border-bottom: 1px solid var(--border); }
.nav { display: flex; align-items: center; justify-content: space-between; min-height: 68px; }
.brand { display: inline-flex; align-items: center; gap: .6rem; font-weight: 800; font-size: 1.15rem; letter-spacing: -.02em; color: var(--text); text-decoration: none; }
.nav-toggle { display: inline-flex; flex-direction: column; gap: 5px; background: none; border: 0; padding: .6rem; cursor: pointer; }
.nav-toggle .bar { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: transform .25s, opacity .25s; }
.nav-toggle[aria-expanded="true"] .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.menu { position: absolute; inset: 68px 0 auto 0; display: none; flex-direction: column; gap: .25rem; padding: var(--space); background: var(--bg); border-bottom: 1px solid var(--border); box-shadow: 0 30px 60px -20px #000; }
.menu.open { display: flex; animation: drop .25s ease-out; }
.menu a { padding: .7rem .2rem; color: var(--muted); text-decoration: none; font-weight: 500; }
.menu a:hover, .menu a[aria-current="page"] { color: var(--text); }
.menu-cta { color: var(--text) !important; }
@keyframes drop { from { opacity: 0; transform: translateY(-8px); } }
@media (min-width: 768px) {
  .nav-toggle { display: none; }
  .menu { position: static; display: flex; flex-direction: row; align-items: center; gap: 1.6rem; padding: 0; background: none; border: 0; box-shadow: none; backdrop-filter: none; }
  .menu-cta { padding: .5rem 1rem !important; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); }
}

/* Hero */
.hero { padding-block: clamp(4rem, 12vw, 8rem) clamp(3rem, 8vw, 5rem); text-align: center; }
.eyebrow { display: inline-flex; align-items: center; gap: .55rem; margin: 0 0 1.5rem; padding: .4rem .9rem; font-size: .85rem; color: var(--muted); border: 1px solid var(--border); border-radius: 999px; background: var(--surface); }
.pulse { width: 8px; height: 8px; border-radius: 50%; background: #34d399; box-shadow: 0 0 0 0 rgba(52, 211, 153, .6); animation: pulse 2s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 10px rgba(52, 211, 153, 0); } 100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); } }
.hero h1 { margin: 0 0 1.25rem; font-size: clamp(2.5rem, 8vw, 5.2rem); line-height: 1.02; letter-spacing: -.045em; font-weight: 800; }
.gradient-text { background: var(--gradient); background-size: 200% auto; -webkit-background-clip: text; background-clip: text; color: transparent; animation: shine 6s linear infinite; }
@keyframes shine { to { background-position: 200% center; } }
.lead { max-width: 62ch; margin: 0 auto 2.25rem; font-size: clamp(1.05rem, 2.2vw, 1.25rem); color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; justify-content: center; gap: .9rem; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: .8rem 1.6rem; border-radius: 999px; font-weight: 700; text-decoration: none; transition: transform .2s, box-shadow .2s, background .2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--gradient); background-size: 150% auto; box-shadow: 0 10px 40px -10px rgba(139, 92, 246, .8), inset 0 1px 0 rgba(255, 255, 255, .25); }
.button-primary:hover { box-shadow: 0 16px 50px -8px rgba(236, 72, 153, .75); background-position: right center; }
.button-ghost { color: var(--text); border: 1px solid var(--border); background: var(--surface); }
.button-ghost:hover { background: var(--surface-strong); }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; max-width: 640px; margin: 3.5rem auto 0; }
.stats div { padding: 1rem .5rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.stats dt { font-size: clamp(1.4rem, 4vw, 2rem); font-weight: 800; background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stats dd { margin: 0; font-size: .8rem; color: var(--muted); }

/* Secciones y tarjetas de vidrio con borde que brilla */
.section { padding-block: clamp(3rem, 8vw, 5.5rem); }
.section-title { margin: 0 0 2rem; font-size: clamp(1.7rem, 4.5vw, 2.8rem); line-height: 1.1; letter-spacing: -.03em; text-align: center; }
.features { display: grid; gap: var(--space); grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.feature { position: relative; padding: 1.75rem; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); backdrop-filter: blur(10px); transition: transform .3s, border-color .3s, background .3s; }
.feature::before { content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1px; background: var(--gradient); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude; opacity: 0; transition: opacity .3s; }
.feature:hover { transform: translateY(-4px); background: var(--surface-strong); }
.feature:hover::before { opacity: 1; }
.feature h3 { margin: 1rem 0 .4rem; font-size: 1.2rem; }
.feature p { margin: 0; color: var(--muted); }
.icon { width: 44px; height: 44px; padding: 10px; color: var(--c1); border-radius: 12px; background: rgba(34, 211, 238, .1); border: 1px solid rgba(34, 211, 238, .25); }

/* Carrusel: scroll-snap + botones y puntos (main.js) */
.carousel { position: relative; }
.carousel-track { display: flex; gap: 1rem; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; border-radius: var(--radius); }
.carousel-track::-webkit-scrollbar { display: none; }
.slide { flex: 0 0 100%; min-height: clamp(220px, 40vw, 380px); display: flex; align-items: flex-end; scroll-snap-align: center; border-radius: var(--radius); border: 1px solid var(--border); overflow: hidden; }
.slide-1 { background: radial-gradient(circle at 20% 20%, rgba(34, 211, 238, .55), transparent 55%), linear-gradient(135deg, #0b1b2e, #111827); }
.slide-2 { background: radial-gradient(circle at 80% 30%, rgba(139, 92, 246, .6), transparent 55%), linear-gradient(135deg, #1a1033, #0f0f1a); }
.slide-3 { background: radial-gradient(circle at 50% 80%, rgba(236, 72, 153, .55), transparent 55%), linear-gradient(135deg, #2a0f24, #0f0f1a); }
.slide-content { padding: clamp(1.25rem, 4vw, 2.5rem); }
.slide-content h3 { margin: 0 0 .25rem; font-size: clamp(1.5rem, 4vw, 2.4rem); letter-spacing: -.03em; }
.slide-content p { margin: 0; color: #d6dbe7; }
.carousel-controls { display: flex; align-items: center; justify-content: center; gap: 1rem; margin-top: 1.25rem; }
.carousel-btn { width: 44px; height: 44px; font-size: 1.5rem; line-height: 1; color: var(--text); border: 1px solid var(--border); border-radius: 50%; background: var(--surface); cursor: pointer; }
.carousel-btn:hover { background: var(--surface-strong); }
.dots { display: flex; gap: .5rem; }
.dot { width: 10px; height: 10px; padding: 0; border: 0; border-radius: 999px; background: var(--border); cursor: pointer; transition: width .3s, background .3s; }
.dot[aria-selected="true"] { width: 28px; background: var(--gradient); }

/* Llamado final */
.cta { text-align: center; border: 1px solid var(--border); border-radius: calc(var(--radius) * 1.5); background: radial-gradient(ellipse at top, rgba(139, 92, 246, .25), transparent 70%), var(--surface); margin-bottom: 4rem; }
.cta h2 { margin: 0 0 .75rem; font-size: clamp(1.8rem, 5vw, 3rem); letter-spacing: -.03em; }

.site-footer { border-top: 1px solid var(--border); padding-block: 2rem; font-size: .9rem; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem; }

/* Aparición al hacer scroll (main.js agrega .visible) */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.js .reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}
.brand-accent { background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---- Landing ZDev ---- */
.wordmark { font-weight: 800; letter-spacing: .18em; font-size: 1rem; }
.kicker { margin: 0 0 .75rem; text-align: center; font-size: .78rem; font-weight: 700; letter-spacing: .22em; text-transform: uppercase; color: var(--c1); }
.section-lead { max-width: 64ch; margin: -.75rem auto 2.5rem; text-align: center; color: var(--muted); font-size: clamp(1rem, 2vw, 1.15rem); }
.section-title { max-width: 22ch; margin-inline: auto; text-wrap: balance; }
.hero h1 { text-wrap: balance; }
html { scroll-padding-top: 84px; }
.features-4 { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.duo { display: grid; gap: var(--space); grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.panel { position: relative; padding: clamp(1.4rem, 3vw, 2.2rem); border-radius: calc(var(--radius) * 1.3); border: 1px solid var(--border); background: linear-gradient(160deg, var(--surface-strong), var(--surface)); backdrop-filter: blur(10px); }
.panel h3 { margin: .3rem 0 .6rem; font-size: 1.4rem; letter-spacing: -.02em; }
.panel p { color: var(--muted); }
.panel.wide { margin-top: var(--space); }
.tag { display: inline-block; margin: 0 0 .5rem; padding: .25rem .75rem; font-size: .75rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--c1); border: 1px solid rgba(34, 211, 238, .3); border-radius: 999px; background: rgba(34, 211, 238, .08); }
.checks { list-style: none; margin: 1.25rem 0 0; padding: 0; display: grid; gap: .7rem; }
.checks li { position: relative; padding-left: 1.7rem; color: #cfd5e4; }
.checks li::before { content: ""; position: absolute; left: 0; top: .5em; width: .75rem; height: .75rem; border-radius: 50%; background: var(--gradient); box-shadow: 0 0 12px rgba(139, 92, 246, .7); }
.two-col { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); margin-top: .5rem; }

.diagram { margin: 0 0 var(--space); padding: clamp(1rem, 3vw, 2rem); border: 1px solid var(--border); border-radius: calc(var(--radius) * 1.5); background: radial-gradient(ellipse at 50% 30%, rgba(139, 92, 246, .16), transparent 70%), var(--surface); }
.diagram svg { display: block; width: 100%; height: auto; max-width: 860px; margin-inline: auto; }
.diagram figcaption { margin-top: 1rem; text-align: center; font-size: .85rem; color: var(--muted); }
.diagram-tall { display: none !important; max-width: 380px !important; }
@media (max-width: 640px) { .diagram-wide { display: none !important; } .diagram-tall { display: block !important; } }
.dg-links line { stroke: var(--c2); stroke-width: 1.6; stroke-dasharray: 3 7; stroke-linecap: round; animation: flow 1.6s linear infinite; }
.dg-mail line { stroke: var(--c1); stroke-width: 1.4; stroke-dasharray: 2 6; stroke-linecap: round; opacity: .8; animation: flow 2.4s linear infinite reverse; }
.dg-faint line { stroke: var(--border); stroke-width: 1.4; }
@keyframes flow { to { stroke-dashoffset: -20; } }
.dg-node rect { fill: rgba(255, 255, 255, .05); stroke: rgba(255, 255, 255, .16); stroke-width: 1; }
.dg-halo { fill: rgba(139, 92, 246, .14); stroke: rgba(139, 92, 246, .35); stroke-width: 1; animation: breathe 4s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
@keyframes breathe { 50% { transform: scale(1.08); opacity: .6; } }
.dg-core { fill: #10101c; stroke: var(--c2); stroke-width: 2; }
.dg-zion { fill: var(--text); font: 800 18px var(--font); letter-spacing: .08em; }
.dg-label { fill: var(--text); font: 600 15px var(--font); }
.dg-sub { fill: var(--muted); font: 400 12.5px var(--font); }
.dg-note { fill: var(--c1); font: 500 11.5px var(--font); letter-spacing: .06em; }

.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space); grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.step { padding: 1.6rem; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); }
.step .num { font-size: .85rem; font-weight: 800; letter-spacing: .15em; background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
.step h3 { margin: .5rem 0 .4rem; font-size: 1.15rem; }
.step p { margin: 0; color: var(--muted); }

.built { text-align: center; padding-block: clamp(1.5rem, 4vw, 2.5rem); border-block: 1px solid var(--border); }
.built-list { max-width: 70ch; margin: 0 auto; color: var(--muted); line-height: 2; }
.closing { text-align: center; padding-block: clamp(4rem, 10vw, 7rem); }
.closing h2 { margin: 0 0 .75rem; font-size: clamp(2rem, 6vw, 3.6rem); letter-spacing: -.035em; text-wrap: balance; }
.closing .lead { margin-bottom: 0; }
.stats dd { font-size: .78rem; }
@media (min-width: 900px) { .features-3 { grid-template-columns: repeat(3, 1fr); } }
.fineprint { max-width: 60ch; margin: 1.75rem auto 0; text-align: center; font-size: .9rem; color: var(--muted); }