/* Nexus Digital — sistema visual
   ink/deep/panel: capas de fondo azul noche · volt: cian eléctrico (acción) · plasma: violeta (conexiones) */
:root {
  --ink: #070B22;
  --deep: #0C1235;
  --panel: #111A45;
  --line: #243172;
  --volt: #3DF2FF;
  --plasma: #9D6BFF;
  --text: #E8EDFF;
  --muted: #929DD3;
  --pro: #4BE3A0;
  --con: #FF8E7D;
  --amazon: #FFB547;
  --r-s: 8px;
  --r-m: 14px;
  --r-l: 22px;
  --display: "Unbounded", system-ui, sans-serif;
  --body: "Manrope", system-ui, sans-serif;
  --wrap: 1200px;
  --gut: clamp(16px, 4vw, 40px);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font: 400 1rem/1.6 var(--body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before { /* retícula de fondo */
  content: "";
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(rgba(61, 242, 255, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(61, 242, 255, .035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 30%, transparent 75%);
}
img, svg { display: block; max-width: 100%; }
a { color: var(--volt); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--volt); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3 { font-family: var(--display); font-weight: 600; line-height: 1.12; letter-spacing: -.02em; margin: 0; }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); }
h3 { font-size: 1.05rem; letter-spacing: -.01em; }
p { margin: 0; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--volt); color: var(--ink); padding: 8px 14px; border-radius: var(--r-s); font-weight: 700; }
.skip:focus { top: 12px; }
.ico { width: 1.25em; height: 1.25em; flex: none; }

/* ---------- botones ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5em;
  min-height: 46px; padding: 0 22px; border-radius: 999px;
  font: 700 .95rem/1 var(--body); text-decoration: none !important; cursor: pointer;
  border: 1px solid transparent;
  transition: transform .18s ease, box-shadow .25s ease, background-color .2s ease, border-color .2s ease;
}
.btn:active { transform: scale(.97); }
.btn--primary { background: var(--volt); color: var(--ink); box-shadow: 0 0 0 0 rgba(61, 242, 255, .5); }
.btn--primary:hover { box-shadow: 0 0 28px 2px rgba(61, 242, 255, .45); }
.btn--ghost { color: var(--text); border-color: var(--line); background: rgba(17, 26, 69, .5); backdrop-filter: blur(6px); }
.btn--ghost:hover { border-color: var(--volt); }
.btn--amazon { background: var(--amazon); color: #1A1200; width: 100%; }
.btn--amazon:hover { box-shadow: 0 0 24px rgba(255, 181, 71, .45); }

/* ---------- cabecera ---------- */
.top {
  position: sticky; top: 0; z-index: 50;
  background: rgba(7, 11, 34, .72);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid rgba(36, 49, 114, .6);
}
.top__in { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gut); height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.logo { display: inline-flex; align-items: center; gap: 10px; color: var(--text); font: 600 1.05rem/1 var(--display); letter-spacing: -.02em; text-decoration: none !important; }
.logo b { font-weight: 600; color: var(--volt); margin-left: 2px; }
.logo__mark { width: 34px; height: 34px; transition: transform .6s cubic-bezier(.2, .8, .2, 1); }
.logo:hover .logo__mark { transform: rotate(60deg); }
.top__nav { display: flex; align-items: center; gap: 28px; }
.top__nav > a { color: var(--muted); font-weight: 600; font-size: .95rem; position: relative; text-decoration: none; }
.top__nav > a:hover, .top__nav > a[aria-current] { color: var(--text); }
.top__nav > a[aria-current]::after { content: ""; position: absolute; left: 0; right: 0; bottom: -8px; height: 2px; background: var(--volt); box-shadow: 0 0 10px var(--volt); }
.top__cats { display: none; }
.top__burger { display: none; }

@media (max-width: 820px) {
  .top__burger { display: grid; place-content: center; gap: 6px; width: 44px; height: 44px; background: none; border: 1px solid var(--line); border-radius: 12px; cursor: pointer; }
  .top__burger span:not(.sr) { width: 18px; height: 2px; background: var(--text); transition: transform .25s ease; }
  .top__burger[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .top__burger[aria-expanded="true"] span:nth-child(2) { transform: translateY(-4px) rotate(-45deg); }
  .top__nav {
    position: fixed; top: 68px; left: 0; right: 0; bottom: 0;
    flex-direction: column; align-items: stretch; gap: 0; padding: 12px var(--gut) 40px;
    background: rgba(7, 11, 34, .97); overflow-y: auto;
    opacity: 0; visibility: hidden; transform: translateY(-8px);
    transition: opacity .25s ease, transform .25s ease, visibility .25s;
  }
  .top__nav.is-open { opacity: 1; visibility: visible; transform: none; }
  .top__nav > a { padding: 16px 0; font-size: 1.1rem; border-bottom: 1px solid var(--line); }
  .top__nav > a[aria-current]::after { display: none; }
  .top__cats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding-top: 20px; }
  .top__cats a { display: flex; align-items: center; gap: 8px; padding: 12px; border: 1px solid var(--line); border-radius: var(--r-m); color: var(--text); font-weight: 600; font-size: .9rem; }
  .top__cats .ico { color: var(--volt); }
}

/* ---------- hero ---------- */
.hero {
  position: relative; isolation: isolate;
  min-height: min(88vh, 820px);
  display: flex; flex-direction: column; justify-content: center;
  padding: 80px var(--gut) 72px;
  overflow: hidden;
}
.hero::after { /* halo */
  content: ""; position: absolute; z-index: -2; inset: auto -10% -40% 30%; height: 80%;
  background: radial-gradient(closest-side, rgba(157, 107, 255, .22), transparent);
  pointer-events: none;
}
.hero__net { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -1; }
.hero__in { max-width: var(--wrap); width: 100%; margin: 0 auto; pointer-events: none; }
.hero__in a { pointer-events: auto; }
.hero__title {
  font-size: clamp(2.3rem, 5vw, 4.6rem);
  font-weight: 700; line-height: 1.04; letter-spacing: -.035em;
  max-width: min(12ch, 600px);
  background: linear-gradient(100deg, #fff 0%, #fff 45%, var(--volt) 75%, var(--plasma) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__title .g { color: var(--volt); -webkit-text-fill-color: var(--volt); }
.hero__sub { margin-top: 28px; max-width: 46ch; color: var(--muted); font-size: clamp(1.05rem, 1.6vw, 1.2rem); }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.hero__hint { position: absolute; right: var(--gut); bottom: 24px; color: var(--muted); font-size: .8rem; opacity: .7; }
@media (max-width: 820px) { .hero__hint { display: none; } .hero { min-height: 0; padding-top: 270px; } }

/* ---------- ticker ---------- */
.ticker { border-block: 1px solid var(--line); background: var(--deep); overflow: hidden; padding: 14px 0; mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.ticker__track { display: flex; width: max-content; margin: 0; padding: 0; list-style: none; animation: ticker 60s linear infinite; }
.ticker li { display: flex; align-items: center; color: var(--muted); font: 500 .9rem/1 var(--display); white-space: nowrap; padding-right: 44px; }
.ticker li::before { content: ""; width: 7px; height: 7px; margin-right: 44px; border: 1.5px solid var(--volt); transform: rotate(45deg); }
.ticker:hover .ticker__track { animation-play-state: paused; }
@keyframes ticker { to { transform: translateX(-50%); } }

/* ---------- secciones ---------- */
.sec { max-width: var(--wrap); margin: 0 auto; padding: 96px var(--gut) 0; }
.sec--tight { padding-top: 40px; }
.sec__head { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 12px 32px; margin-bottom: 36px; }
.sec__head p { color: var(--muted); max-width: 52ch; }
main > :last-child { padding-bottom: 110px; }

/* tarjetas que siguen al cursor: borde luminoso */
.tile, .pcard, .gcard { --mx: 50%; --my: 50%; position: relative; }
.tile::before, .pcard::before, .gcard::before {
  content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1px; pointer-events: none;
  background: radial-gradient(260px circle at var(--mx) var(--my), var(--volt), var(--plasma) 40%, transparent 70%);
  -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 ease;
}
.tile:hover::before, .pcard:hover::before, .gcard:hover::before { opacity: 1; }

/* ---------- categorías ---------- */
.tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.tile {
  display: flex; flex-direction: column; gap: 10px;
  padding: 28px; border-radius: var(--r-l);
  background: linear-gradient(160deg, var(--panel), var(--deep));
  border: 1px solid var(--line); color: var(--text); text-decoration: none !important;
  transition: transform .3s cubic-bezier(.2, .8, .2, 1);
}
.tile:hover { transform: translateY(-4px); }
.tile__ico { display: grid; place-items: center; width: 52px; height: 52px; margin-bottom: 10px; border-radius: 14px; background: rgba(61, 242, 255, .08); color: var(--volt); }
.tile__ico .ico { width: 28px; height: 28px; }
.tile p { color: var(--muted); font-size: .95rem; }
.tile__count { margin-top: auto; padding-top: 8px; color: var(--plasma); font-weight: 700; font-size: .85rem; font-variant-numeric: tabular-nums; }
@media (max-width: 900px) { .tiles { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .tiles { grid-template-columns: 1fr; } .tile { padding: 22px; } }

/* ---------- producto ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 18px; }
.pcard { display: flex; flex-direction: column; border-radius: var(--r-l); background: var(--deep); border: 1px solid var(--line); }
.pcard__visual { position: relative; aspect-ratio: 4 / 3; border-radius: var(--r-l) var(--r-l) 0 0; overflow: hidden; background: radial-gradient(circle at 50% 50%, #17225A, var(--deep) 75%); }
@media (max-width: 600px) { .pcard__visual { aspect-ratio: 16 / 8; } }
.pcard__body { display: flex; flex-direction: column; gap: 8px; padding: 20px 22px 22px; flex: 1; }
.pcard__body .btn { margin-top: auto; }
.brand { color: var(--volt); font-weight: 700; font-size: .82rem; }
.pcard__name { font-size: 1.1rem; }
.pcard__text { color: var(--muted); font-size: .93rem; margin-bottom: 6px; }

.circuit { position: absolute; inset: 0; width: 100%; height: 100%; }
.circuit__traces path { fill: none; stroke: var(--plasma); stroke-width: 1.4; opacity: .55; stroke-dasharray: 1; stroke-dashoffset: 0; }
.circuit__pads circle { fill: var(--deep); stroke: var(--plasma); stroke-width: 1.4; opacity: .7; }
.pcard:hover .circuit__traces path, .pinline:hover .circuit__traces path {
  stroke: var(--volt); opacity: 1;
  animation: trace .9s cubic-bezier(.4, 0, .2, 1) both; animation-delay: calc(var(--i) * 60ms);
}
@keyframes trace { from { stroke-dashoffset: 1; } to { stroke-dashoffset: 0; } }
.chip {
  position: absolute; left: 50%; top: 50%; translate: -50% -50%;
  display: grid; place-items: center; width: 74px; height: 74px; border-radius: 18px;
  background: linear-gradient(145deg, #1B2768, #0E1540); border: 1px solid #3A4AA0;
  color: var(--volt);
  box-shadow: 0 0 0 6px rgba(7, 11, 34, .7), 0 10px 30px rgba(0, 0, 0, .4);
  transition: box-shadow .35s ease, transform .35s cubic-bezier(.2, .8, .2, 1);
}
.chip::before, .chip::after { /* patillas del chip */
  content: ""; position: absolute; inset: -9px 14px; pointer-events: none;
  background: repeating-linear-gradient(90deg, #3A4AA0 0 3px, transparent 3px 10px);
  -webkit-mask: linear-gradient(#000 0 5px, transparent 5px calc(100% - 5px), #000 0); mask: linear-gradient(#000 0 5px, transparent 5px calc(100% - 5px), #000 0);
}
.chip::after { inset: 14px -9px; background: repeating-linear-gradient(0deg, #3A4AA0 0 3px, transparent 3px 10px); -webkit-mask: linear-gradient(90deg, #000 0 5px, transparent 5px calc(100% - 5px), #000 0); mask: linear-gradient(90deg, #000 0 5px, transparent 5px calc(100% - 5px), #000 0); }
.chip__ico { width: 34px; height: 34px; }
.pcard:hover .chip, .pinline:hover .chip { transform: scale(1.06); box-shadow: 0 0 0 6px rgba(7, 11, 34, .7), 0 0 36px rgba(61, 242, 255, .45); }

.score { position: absolute; top: 14px; right: 14px; display: flex; align-items: baseline; gap: 2px; padding: 6px 11px; border-radius: 999px; background: rgba(7, 11, 34, .82); border: 1px solid var(--line); backdrop-filter: blur(6px); font-variant-numeric: tabular-nums; }
.score__n { font: 700 1rem/1 var(--display); color: var(--volt); }
.score__of { color: var(--muted); font-size: .72rem; font-weight: 600; }

.pc { border-top: 1px solid var(--line); margin: 4px 0 14px; }
.pc summary { cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 12px 0 2px; color: var(--text); font-weight: 600; font-size: .9rem; }
.pc summary::-webkit-details-marker { display: none; }
.pc summary::after { content: ""; width: 9px; height: 9px; border-right: 2px solid var(--volt); border-bottom: 2px solid var(--volt); transform: rotate(45deg) translateY(-3px); transition: transform .25s ease; }
.pc[open] summary::after { transform: rotate(225deg) translateY(-3px); }
.pc__grid { display: grid; gap: 12px; padding-top: 12px; }
.pc__h { font-weight: 700; font-size: .82rem; margin-bottom: 4px; }
.pc__h--pro { color: var(--pro); }
.pc__h--con { color: var(--con); }
.pc__list { margin: 0; padding: 0; list-style: none; display: grid; gap: 4px; font-size: .9rem; color: var(--muted); }
.pc__list li { position: relative; padding-left: 20px; }
.pc__list li::before { position: absolute; left: 0; font-weight: 700; }
.pc__list--pro li::before { content: "+"; color: var(--pro); }
.pc__list--con li::before { content: "−"; color: var(--con); }
.pc__ideal { margin-top: 12px; font-size: .9rem; color: var(--muted); }
.pc__ideal strong { color: var(--text); }
.pc[open] .pc__grid, .pc[open] .pc__ideal { animation: open .3s ease both; }
@keyframes open { from { opacity: 0; transform: translateY(-6px); } }

/* ficha dentro de guías */
.pinline { display: grid; grid-template-columns: 200px 1fr; margin: 28px 0; border-radius: var(--r-l); background: var(--deep); border: 1px solid var(--line); overflow: hidden; }
.pinline__visual { position: relative; min-height: 180px; background: radial-gradient(circle at 50% 50%, #17225A, var(--deep) 75%); }
.pinline__body { padding: 20px 24px; display: flex; flex-direction: column; gap: 6px; }
.pinline__name { font-size: 1.1rem; }
.pinline__text { color: var(--muted); font-size: .95rem; }
.pinline__foot { display: flex; align-items: center; gap: 14px; margin-top: 10px; }
.pinline__foot .score { position: static; }
.pinline__foot .btn { width: auto; }
@media (max-width: 600px) {
  .pinline { grid-template-columns: 1fr; }
  .pinline__visual { min-height: 150px; }
  .pinline__foot { flex-wrap: wrap; }
  .pinline__foot .btn { flex: 1; }
}

/* ---------- guías ---------- */
.gcards { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; }
.gcard { display: flex; flex-direction: column; gap: 12px; padding: 28px; border-radius: var(--r-l); background: linear-gradient(160deg, var(--panel), var(--deep)); border: 1px solid var(--line); color: var(--text); text-decoration: none !important; transition: transform .3s cubic-bezier(.2, .8, .2, 1); }
.gcard:hover { transform: translateY(-4px); }
.gcard h3 { font-size: 1.2rem; line-height: 1.25; }
.gcard p { color: var(--muted); font-size: .95rem; }
.gcard__cat { display: inline-flex; align-items: center; gap: 8px; color: var(--plasma); font-weight: 700; font-size: .85rem; }
.gcard__meta { margin-top: auto; padding-top: 8px; color: var(--muted); font-size: .85rem; }

/* ---------- método ---------- */
.method { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: center; }
.method__text { display: grid; gap: 20px; justify-items: start; }
.method__text p { color: var(--muted); max-width: 54ch; }
.method__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.method__list li { display: grid; gap: 4px; padding: 20px 22px; border-left: 2px solid var(--volt); background: linear-gradient(90deg, rgba(61, 242, 255, .06), transparent); border-radius: 0 var(--r-m) var(--r-m) 0; }
.method__list span { color: var(--muted); font-size: .95rem; }
@media (max-width: 860px) { .method { grid-template-columns: 1fr; gap: 32px; } }

/* ---------- cabecera de página ---------- */
.phead { max-width: var(--wrap); margin: 0 auto; padding: 56px var(--gut) 8px; }
.phead h1 { font-size: clamp(2rem, 5vw, 3.6rem); letter-spacing: -.03em; }
.phead__row { display: flex; gap: 24px; align-items: flex-start; }
.phead__ico { display: grid; place-items: center; flex: none; width: 72px; height: 72px; border-radius: 20px; background: rgba(61, 242, 255, .08); border: 1px solid var(--line); color: var(--volt); box-shadow: 0 0 40px rgba(61, 242, 255, .15); }
.phead__ico .ico { width: 36px; height: 36px; }
.phead__lead { margin-top: 18px; max-width: 68ch; color: var(--muted); font-size: 1.08rem; }
@media (max-width: 600px) { .phead__row { flex-direction: column; gap: 16px; } .phead__ico { width: 56px; height: 56px; } }
.crumbs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; color: var(--muted); font-size: .88rem; }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--volt); }
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chips a { display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; border-radius: 999px; border: 1px solid var(--line); color: var(--text); font-weight: 600; font-size: .92rem; text-decoration: none; transition: border-color .2s ease, color .2s ease; }
.chips a:hover { border-color: var(--volt); color: var(--volt); }
.chips .ico { color: var(--volt); }

/* ---------- artículo ---------- */
.article { max-width: 760px; margin: 0 auto; padding: 56px var(--gut) 0; }
.article__head h1 { font-size: clamp(1.9rem, 4.4vw, 3rem); letter-spacing: -.03em; }
.article__lead { margin-top: 18px; color: var(--muted); font-size: 1.15rem; }
.article__meta { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 22px; color: var(--muted); font-size: .88rem; }
.article__meta span { display: inline-flex; align-items: center; gap: 6px; }
.article__meta .ico { color: var(--volt); }
.article__disc { margin: 32px 0 8px; padding: 14px 18px; border-radius: var(--r-m); background: rgba(255, 181, 71, .08); border: 1px solid rgba(255, 181, 71, .25); color: #F3D9AE; font-size: .9rem; }
.prose { font-size: 1.07rem; line-height: 1.75; }
.prose > * + * { margin-top: 1.1em; }
.prose h2 { margin-top: 2.2em; font-size: clamp(1.3rem, 2.6vw, 1.7rem); }
.prose ul { padding-left: 1.2em; }
.prose li + li { margin-top: .5em; }
.prose li::marker { color: var(--volt); }
.prose strong { color: #fff; }
.prose a { text-decoration: underline; text-underline-offset: 3px; }

/* ---------- 404 ---------- */
.nf { max-width: 640px; margin: 0 auto; padding: 120px var(--gut) 0; text-align: center; display: grid; justify-items: center; gap: 18px; }
.nf__code { font: 700 clamp(5rem, 18vw, 9rem)/1 var(--display); color: var(--volt); text-shadow: 0 0 40px rgba(61, 242, 255, .5); }
.nf p:not(.nf__code) { color: var(--muted); }

/* ---------- pie ---------- */
.foot { margin-top: 0; border-top: 1px solid var(--line); background: var(--deep); padding: 64px var(--gut) 32px; }
.foot__in { max-width: var(--wrap); margin: 0 auto; display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; }
.foot__brand p { margin-top: 16px; color: var(--muted); font-size: .92rem; max-width: 36ch; }
.foot__h { font: 600 .92rem/1 var(--display); margin-bottom: 16px; }
.foot ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.foot ul a { color: var(--muted); font-size: .92rem; }
.foot ul a:hover { color: var(--volt); }
.foot__disc, .foot__copy { max-width: var(--wrap); margin: 48px auto 0; color: var(--muted); font-size: .82rem; }
.foot__disc { padding-top: 24px; border-top: 1px solid var(--line); }
.foot__copy { margin-top: 10px; }
@media (max-width: 860px) { .foot__in { grid-template-columns: 1fr 1fr; } .foot__brand { grid-column: 1 / -1; } }

/* ---------- movimiento reducido ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .ticker__track { animation: none; }
}