/* =========================================================================
   SOINTELCA — Redes eléctricas MT/BT
   Design system: Archivo (display) · IBM Plex Sans (body) · IBM Plex Mono (spec)
   Dark is the signature experience; light is a blueprint variant.
   ========================================================================= */

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
img, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; padding: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; }

/* ---------- Tokens (light defaults) ---------- */
:root {
  --bg:        #F1F5F2;
  --bg-2:      #FFFFFF;
  --bg-3:      #F2F7F3;
  --line:      #DBE5DE;
  --line-strong:#C1D0C7;
  --ink:       #0A140D;
  --ink-dim:   #46564C;
  --ink-faint: #76867C;
  --accent:    #008136;   /* verde de marca SOINTELCA — fills/glyphs */
  --accent-ink:#00702E;   /* verde legible para texto sobre claro */
  --accent-hot:#009B41;
  --volt:      #6E7D74;   /* gris-verde neutro, uso puntual */
  --ok:        #008136;
  --rail-base: #C6D3CB;
  --grid-line: rgba(0,80,40,.05);
  --shadow:    0 20px 50px -24px rgba(6,40,22,.22);
  --shadow-sm: 0 8px 24px -14px rgba(6,40,22,.26);

  --font-display: 'Archivo', system-ui, sans-serif;
  --font-body: 'IBM Plex Sans', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;

  --wrap: 1160px;
  --radius: 14px;
  --radius-sm: 10px;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #070C09;
    --bg-2:      #0C130E;
    --bg-3:      #111A14;
    --line:      #1D2A22;
    --line-strong:#2C4034;
    --ink:       #E9F1EC;
    --ink-dim:   #98ACA1;
    --ink-faint: #5E7268;
    --accent:    #0F9B45;
    --accent-ink:#43D07C;
    --accent-hot:#57E08D;
    --volt:      #7E8F85;
    --ok:        #2FCE6E;
    --rail-base: #1C2A22;
    --grid-line: rgba(90,190,130,.06);
    --shadow:    0 30px 70px -30px rgba(0,0,0,.7);
    --shadow-sm: 0 12px 30px -18px rgba(0,0,0,.7);
    color-scheme: dark;
  }
}

/* Explicit toggle overrides (must win in both directions) */
:root[data-theme="light"] {
  --bg:#F1F5F2; --bg-2:#FFFFFF; --bg-3:#F2F7F3; --line:#DBE5DE; --line-strong:#C1D0C7;
  --ink:#0A140D; --ink-dim:#46564C; --ink-faint:#76867C;
  --accent:#008136; --accent-ink:#00702E; --accent-hot:#009B41; --volt:#6E7D74; --ok:#008136;
  --rail-base:#C6D3CB; --grid-line:rgba(0,80,40,.05);
  --shadow:0 20px 50px -24px rgba(6,40,22,.22); --shadow-sm:0 8px 24px -14px rgba(6,40,22,.26);
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg:#070C09; --bg-2:#0C130E; --bg-3:#111A14; --line:#1D2A22; --line-strong:#2C4034;
  --ink:#E9F1EC; --ink-dim:#98ACA1; --ink-faint:#5E7268;
  --accent:#0F9B45; --accent-ink:#43D07C; --accent-hot:#57E08D; --volt:#7E8F85; --ok:#2FCE6E;
  --rail-base:#1C2A22; --grid-line:rgba(90,190,130,.06);
  --shadow:0 30px 70px -30px rgba(0,0,0,.7); --shadow-sm:0 12px 30px -18px rgba(0,0,0,.7);
  color-scheme: dark;
}

/* ---------- Base ---------- */
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  font-size: 1.02rem;
  overflow-x: hidden;
}

.wrap { width: min(100% - 2.5rem, var(--wrap)); margin-inline: auto; }

.mono { font-family: var(--font-mono); font-feature-settings: "tnum"; }

.skip-link {
  position: fixed; left: 1rem; top: -60px; z-index: 200;
  background: var(--accent); color: #fff; padding: .6rem 1rem;
  border-radius: 8px; font-weight: 600; transition: top .2s;
}
.skip-link:focus { top: 1rem; }

/* ---------- Buttons ---------- */
.btn {
  --btn-fg: var(--ink);
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--font-mono); font-weight: 500; font-size: .82rem;
  letter-spacing: .04em; text-transform: uppercase;
  padding: .85rem 1.35rem; border-radius: 999px;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .18s ease, box-shadow .2s ease, background .2s ease, border-color .2s;
  white-space: nowrap;
}
.btn svg { transition: transform .2s ease; }
.btn:hover svg { transform: translateX(3px); }
.btn--sm { padding: .6rem 1rem; font-size: .74rem; }
.btn--primary {
  background: var(--accent); color: #fff;
  box-shadow: 0 8px 24px -10px color-mix(in srgb, var(--accent) 70%, transparent);
}
.btn--primary:hover { background: var(--accent-hot); transform: translateY(-2px); box-shadow: 0 14px 30px -12px color-mix(in srgb, var(--accent) 75%, transparent); }
.btn--ghost { border-color: var(--line-strong); color: var(--ink); background: transparent; }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent-ink); transform: translateY(-2px); }

/* ---------- Eyebrow / headings ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: .55rem;
  font-family: var(--font-mono); font-size: .74rem; font-weight: 500;
  letter-spacing: .18em; text-transform: uppercase; color: var(--accent-ink);
  margin-bottom: 1.1rem;
}
.eyebrow__tick { width: 22px; height: 2px; background: var(--accent); display: inline-block; box-shadow: 0 0 10px var(--accent); }

.section__title {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(1.7rem, 1.1rem + 2.4vw, 2.9rem);
  line-height: 1.06; letter-spacing: -.02em; text-wrap: balance;
  max-width: 20ch;
}
.section__intro { color: var(--ink-dim); max-width: 58ch; margin-top: 1.1rem; font-size: 1.05rem; }

/* =========================================================================
   SIGNATURE SIDE RAIL — el conductor vivo
   ========================================================================= */
.rail {
  position: fixed; left: 34px; top: 0; bottom: 0; z-index: 60;
  width: 46px; display: flex; flex-direction: column; align-items: center;
  padding: 92px 0 40px; pointer-events: none;
}
.rail__track {
  position: relative; flex: 1; width: 2px; background: var(--rail-base);
  border-radius: 2px; overflow: visible;
}
/* energized fill grows top→down with scroll */
.rail__energized {
  position: absolute; left: 50%; top: 0; transform: translateX(-50%);
  width: 3px; height: 0%; border-radius: 3px;
  background: linear-gradient(180deg, var(--accent-hot), var(--accent));
  box-shadow: 0 0 12px color-mix(in srgb, var(--accent) 80%, transparent),
              0 0 26px color-mix(in srgb, var(--accent) 45%, transparent);
  transition: height .12s linear;
}
/* traveling current pulse (the head of the fill) */
.rail__pulse {
  position: absolute; left: 50%; top: 0; transform: translate(-50%, -50%);
  width: 12px; height: 12px; border-radius: 50%;
  background: radial-gradient(circle, #fff 0%, var(--accent-hot) 40%, var(--accent) 70%, transparent 72%);
  box-shadow: 0 0 14px 3px color-mix(in srgb, var(--accent) 75%, transparent);
}
.rail__pulse::after {
  content: ""; position: absolute; inset: -6px; border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--accent) 55%, transparent);
  animation: pulse-ring 1.8s ease-out infinite;
}
@keyframes pulse-ring { 0%{transform:scale(.6);opacity:.9} 100%{transform:scale(2.2);opacity:0} }
/* ambient electrons flowing along the base wire */
.rail__flow {
  position: absolute; inset: 0; border-radius: 2px; overflow: hidden;
  -webkit-mask: linear-gradient(180deg, transparent, #000 8%, #000 92%, transparent);
          mask: linear-gradient(180deg, transparent, #000 8%, #000 92%, transparent);
}
.rail__flow::before {
  content: ""; position: absolute; left: -1px; right: -1px; top: 0; height: 40%;
  background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--accent) 30%, transparent), transparent);
  animation: rail-flow 3.2s linear infinite;
}
@keyframes rail-flow { 0%{top:-40%} 100%{top:100%} }

.rail__nodes {
  position: absolute; top: 92px; bottom: 40px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; justify-content: space-between; align-items: center;
}
.rail__node { position: relative; pointer-events: auto; cursor: pointer; }
.rail__dot {
  display: block; width: 9px; height: 9px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--rail-base);
  transition: border-color .25s, box-shadow .25s, transform .25s, background .25s;
}
.rail__node.is-passed .rail__dot { border-color: var(--accent); }
.rail__node.is-active .rail__dot {
  background: var(--accent); border-color: var(--accent); transform: scale(1.35);
  box-shadow: 0 0 12px 2px color-mix(in srgb, var(--accent) 70%, transparent);
}
.rail__label {
  position: absolute; left: 20px; top: 50%; transform: translateY(-50%);
  font-family: var(--font-mono); font-size: .64rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--ink-dim); white-space: nowrap;
  opacity: 0; transform: translate(-6px,-50%); transition: opacity .22s, transform .22s;
  background: color-mix(in srgb, var(--bg-2) 88%, transparent); padding: .2rem .45rem;
  border-radius: 5px; border: 1px solid var(--line);
}
.rail__node:hover .rail__label,
.rail__node.is-active .rail__label { opacity: 1; transform: translate(0,-50%); }
.rail__node.is-active .rail__label { color: var(--accent-ink); }

.rail__reading {
  margin-top: 14px; font-family: var(--font-mono); font-size: .78rem;
  color: var(--ink-dim); display: flex; align-items: baseline; gap: 1px;
}
.rail__reading small { font-size: .6rem; color: var(--ink-faint); }
.rail__reading #railPercent { color: var(--accent-ink); font-weight: 600; min-width: 2ch; text-align: right; }

/* =========================================================================
   HEADER
   ========================================================================= */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background .3s, border-color .3s, box-shadow .3s;
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border-bottom-color: var(--line);
}
.site-header__inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 1.5rem; }

.brand { display: inline-flex; align-items: center; gap: .7rem; }
.brand__badge { display: inline-flex; align-items: center; border-radius: 9px; transition: background .3s, padding .3s; }
.brand__logo { height: 52px; width: auto; display: block; }
/* En tema oscuro, el logo (con torres negras) va sobre una placa blanca */
:root[data-theme="dark"] .brand__badge { background: #fff; padding: 6px 11px; box-shadow: 0 3px 12px -5px rgba(0,0,0,.6); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .brand__badge { background: #fff; padding: 6px 11px; box-shadow: 0 3px 12px -5px rgba(0,0,0,.6); } }
.site-footer__brand .brand__logo { height: 60px; }
.brand__mark {
  width: 38px; height: 38px; display: grid; place-items: center;
  color: var(--accent); background: var(--bg-3);
  border: 1px solid var(--line); border-radius: 10px;
  box-shadow: inset 0 0 18px -10px color-mix(in srgb, var(--accent) 60%, transparent);
}
.brand__mark svg { width: 20px; height: 20px; filter: drop-shadow(0 0 6px color-mix(in srgb, var(--accent) 60%, transparent)); }
.brand__text { display: flex; flex-direction: column; line-height: 1; }
.brand__name { font-family: var(--font-display); font-weight: 800; letter-spacing: .02em; font-size: 1.12rem; }
.brand__tag { font-family: var(--font-mono); font-size: .62rem; letter-spacing: .12em; color: var(--ink-faint); text-transform: uppercase; margin-top: 3px; }

.nav { display: flex; gap: .35rem; }
.nav a {
  font-family: var(--font-mono); font-size: .8rem; letter-spacing: .03em;
  color: var(--ink-dim); padding: .5rem .8rem; border-radius: 8px;
  transition: color .2s, background .2s; position: relative;
}
.nav a:hover { color: var(--ink); background: color-mix(in srgb, var(--ink) 6%, transparent); }
.nav a.is-active { color: var(--accent-ink); }

.site-header__actions { display: flex; align-items: center; gap: .7rem; }

.theme-toggle {
  width: 40px; height: 40px; display: grid; place-items: center;
  background: var(--bg-3); border: 1px solid var(--line); border-radius: 10px;
  cursor: pointer; color: var(--ink-dim); transition: color .2s, border-color .2s;
}
.theme-toggle:hover { color: var(--accent-ink); border-color: var(--line-strong); }
.theme-toggle__moon { display: none; }
:root[data-theme="dark"] .theme-toggle__sun { display: none; }
:root[data-theme="dark"] .theme-toggle__moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle__sun { display: none; }
  :root:not([data-theme="light"]) .theme-toggle__moon { display: block; }
}

.hamburger { display: none; width: 40px; height: 40px; background: var(--bg-3); border: 1px solid var(--line); border-radius: 10px; cursor: pointer; flex-direction: column; align-items: center; justify-content: center; gap: 4px; }
.hamburger span { width: 18px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform .25s, opacity .2s; }
.hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.mobile-menu {
  position: fixed; top: 72px; left: 0; right: 0; z-index: 99;
  background: var(--bg-2); border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow); padding: 1.2rem 1.25rem 1.6rem;
}
.mobile-menu nav { display: flex; flex-direction: column; gap: .3rem; }
.mobile-menu a { font-family: var(--font-mono); font-size: .95rem; padding: .8rem .6rem; border-radius: 8px; color: var(--ink-dim); }
.mobile-menu a:hover { background: var(--bg-3); color: var(--ink); }
.mobile-menu .btn { margin-top: .8rem; justify-content: center; color: #fff; }

/* =========================================================================
   HERO
   ========================================================================= */
.hero { position: relative; padding: 128px 0 70px; overflow: hidden; }
/* Hero con fotografía de fondo (linero) — siempre oscuro, texto claro en ambos temas */
.hero--photo { background: linear-gradient(160deg, #0a1a10, #05100a 55%, #030906); }
.hero__photos { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.hero__slide {
  position: absolute; inset: 0; background-size: cover; background-position: center right;
  opacity: 0; transition: opacity 1.4s ease;
}
.hero__slide.is-active { opacity: 1; }
.hero__overlay {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: linear-gradient(96deg, rgba(3,10,6,.95) 0%, rgba(3,10,6,.82) 40%, rgba(3,10,6,.45) 70%, rgba(3,10,6,.6) 100%);
}
.hero--photo .hero__grid-bg { opacity: .5; }
/* texto legible sobre la foto (fuerza claro en los dos temas) */
.hero--photo .eyebrow { color: #5FE08D; }
.hero--photo .hero__title { color: #fff; }
.hero--photo .hero__title .live { color: #5FE08D; }
.hero--photo .hero__title .live::after { background: #5FE08D; box-shadow: 0 0 16px #5FE08D; }
.hero--photo .hero__lead { color: rgba(255,255,255,.82); }
.hero--photo .hero__lead strong { color: #fff; }
.hero--photo .hero__specs { border-top-color: rgba(255,255,255,.16); }
.hero--photo .hero__specs .spec { border-right-color: rgba(255,255,255,.16); }
.hero--photo .spec dt { color: rgba(255,255,255,.58); }
.hero--photo .spec dd { color: #fff; }
.hero--photo .spec dd span { color: #5FE08D; }
.hero--photo .hero__scroll { color: rgba(255,255,255,.6); }
.hero--photo .hero__scroll svg { color: #5FE08D; }
.hero--photo .btn--ghost { color: #fff; border-color: rgba(255,255,255,.32); }
.hero--photo .btn--ghost:hover { color: #5FE08D; border-color: #5FE08D; }
/* nav legible sobre el hero oscuro cuando el header aún es transparente */
.site-header:not(.is-scrolled) .nav a { color: rgba(255,255,255,.8); }
.site-header:not(.is-scrolled) .nav a:hover { color: #fff; background: rgba(255,255,255,.1); }
.site-header:not(.is-scrolled) .nav a.is-active { color: #5FE08D; }
.hero__grid-bg {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask: radial-gradient(120% 90% at 70% 0%, #000 30%, transparent 78%);
          mask: radial-gradient(120% 90% at 70% 0%, #000 30%, transparent 78%);
}
.hero__inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 3rem; align-items: center;
}
.hero__title {
  font-family: var(--font-display); font-weight: 900;
  font-size: clamp(2.4rem, 1.3rem + 4.6vw, 4.4rem);
  line-height: 1.02; letter-spacing: -.03em; text-wrap: balance; margin-top: .4rem;
}
.hero__title .live {
  color: var(--accent); position: relative; white-space: nowrap;
}
.hero__title .live::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: .06em; height: .09em;
  background: var(--accent); box-shadow: 0 0 14px var(--accent); opacity: .55;
}
.hero__lead { color: var(--ink-dim); font-size: 1.14rem; max-width: 42ch; margin-top: 1.4rem; }
.hero__lead strong { color: var(--ink); font-weight: 600; }
.hero__actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.9rem; }

.hero__specs {
  display: flex; flex-wrap: wrap; gap: 0; margin-top: 2.4rem;
  border-top: 1px solid var(--line); padding-top: 1.4rem;
}
.hero__specs .spec { padding-right: 1.8rem; margin-right: 1.8rem; border-right: 1px solid var(--line); }
.hero__specs .spec:last-child { border-right: 0; margin-right: 0; padding-right: 0; }
.spec dt { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-faint); }
.spec dd { font-family: var(--font-display); font-weight: 800; font-size: 1.5rem; margin-top: .25rem; letter-spacing: -.02em; }
.spec dd span { color: var(--accent-ink); font-size: .9rem; font-weight: 600; }

/* single-line diagram */
.hero__diagram {
  position: relative; background: var(--bg-2); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.2rem 1.2rem 1rem; box-shadow: var(--shadow);
}
.hero__diagram::before {
  content: ""; position: absolute; inset: 0; border-radius: var(--radius); pointer-events: none;
  background: radial-gradient(80% 60% at 50% 0%, color-mix(in srgb, var(--accent) 8%, transparent), transparent 70%);
}
.hero__diagram-cap { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .08em; color: var(--ink-faint); text-transform: uppercase; margin-bottom: .4rem; }
.hero__diagram-cap .mono { color: var(--accent-ink); }
.sld { width: 100%; height: auto; }
.sld__wires .wire { fill: none; stroke: var(--line-strong); stroke-width: 2.4; stroke-linecap: round; }
.sld__wires .branch { stroke-width: 1.8; }
.sld__flow .flow {
  fill: none; stroke: var(--accent); stroke-width: 2.4; stroke-linecap: round;
  stroke-dasharray: 6 128; filter: drop-shadow(0 0 4px var(--accent));
  animation: flow-move 2.4s linear infinite;
}
.sld__flow .flow--b { animation-duration: 3s; stroke-dasharray: 6 150; }
@keyframes flow-move { to { stroke-dashoffset: -134; } }
.sld__source circle { fill: none; stroke: var(--volt); stroke-width: 2.4; }
.sld__source .plus { stroke: var(--volt); stroke-width: 2; }
.sld__xfmr circle { fill: none; stroke: var(--accent); stroke-width: 2.4; filter: drop-shadow(0 0 6px color-mix(in srgb, var(--accent) 55%, transparent)); }
.sld__loads .load { fill: none; stroke: var(--ink-dim); stroke-width: 2; stroke-linejoin: round; }
.sld__lbl { font-family: var(--font-mono); font-size: 9px; letter-spacing: .06em; fill: var(--ink-faint); }
.sld__lbl--kv { fill: var(--accent-ink); }
.hero__diagram-status {
  display: inline-flex; align-items: center; gap: .5rem; margin-top: .4rem;
  font-family: var(--font-mono); font-size: .72rem; color: var(--ink-dim);
}
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 10px var(--ok); animation: blink 2s ease-in-out infinite; }
@keyframes blink { 50% { opacity: .35; } }

.hero__scroll {
  display: inline-flex; align-items: center; gap: .5rem; margin-top: 3rem;
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--ink-faint);
}
.hero__scroll svg { animation: bob 1.8s ease-in-out infinite; color: var(--accent-ink); }
@keyframes bob { 50% { transform: translateY(4px); } }

/* =========================================================================
   MARQUEE
   ========================================================================= */
.marquee { border-block: 1px solid var(--line); background: var(--bg-2); overflow: hidden; padding: .9rem 0; }
.marquee__row { display: inline-flex; align-items: center; gap: 1.4rem; white-space: nowrap; animation: marquee 34s linear infinite; }
.marquee__row span { font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; color: var(--ink-dim); letter-spacing: -.01em; }
.marquee__row i { color: var(--accent); font-style: normal; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* =========================================================================
   SECTIONS
   ========================================================================= */
.section { padding: 92px 0; }
.section--alt { background: var(--bg-2); border-block: 1px solid var(--line); }
.section__head { margin-bottom: 3rem; }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.is-in { opacity: 1; transform: none; }

/* About */
.about { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: start; }
.about__lead p { color: var(--ink-dim); font-size: 1.08rem; }
.about__lead p + p { margin-top: 1.1rem; }
.about__lead strong { color: var(--ink); font-weight: 600; }
.about__pillars { display: flex; flex-direction: column; gap: 1.1rem; }
.about__pillars li { position: relative; padding: 1.3rem 1.4rem 1.3rem 1.6rem; background: var(--bg-3); border: 1px solid var(--line); border-radius: var(--radius-sm); }
.about__pillars li::before { content: ""; position: absolute; left: 0; top: 1.3rem; bottom: 1.3rem; width: 3px; background: var(--accent); border-radius: 3px; box-shadow: 0 0 12px color-mix(in srgb, var(--accent) 60%, transparent); }
.pillar__k { color: var(--accent-ink); font-size: .78rem; letter-spacing: .1em; }
.about__pillars h3 { font-family: var(--font-display); font-weight: 700; font-size: 1.12rem; margin: .3rem 0 .3rem; }
.about__pillars p { color: var(--ink-dim); font-size: .96rem; }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; margin-top: 3.2rem; border-top: 1px solid var(--line); padding-top: 2.4rem; }
.stat dt { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-faint); }
.stat dd { font-family: var(--font-display); font-weight: 900; font-size: clamp(2rem, 1.2rem + 2.5vw, 3.2rem); letter-spacing: -.03em; margin-top: .3rem; line-height: 1; }
.stat dd span { color: var(--accent); font-size: .5em; margin-left: 2px; }
.stats__note { color: var(--ink-faint); font-size: .72rem; margin-top: 1rem; opacity: .8; }

/* Services */
.services { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; }
.svc {
  position: relative; background: var(--bg-3); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.5rem 1.4rem 1.6rem;
  transition: transform .25s, border-color .25s, box-shadow .25s, background .25s;
  overflow: hidden;
}
.svc::after { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 2px; background: linear-gradient(90deg, var(--accent), transparent); transform: scaleX(0); transform-origin: left; transition: transform .3s ease; }
.svc:hover { transform: translateY(-4px); border-color: var(--line-strong); box-shadow: var(--shadow-sm); }
.svc:hover::after { transform: scaleX(1); }
.svc__num { position: absolute; top: 1.1rem; right: 1.2rem; font-size: .7rem; color: var(--ink-faint); letter-spacing: .1em; }
.svc__icon { width: 46px; height: 46px; display: grid; place-items: center; border-radius: 12px; background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent-ink); border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent); margin-bottom: 1.1rem; }
.svc__icon svg { width: 24px; height: 24px; }
.svc h3 { font-family: var(--font-display); font-weight: 700; font-size: 1.1rem; line-height: 1.2; margin-bottom: .5rem; }
.svc p { color: var(--ink-dim); font-size: .92rem; }
.svc--cta { background: var(--ink); color: var(--bg); display: flex; flex-direction: column; align-items: flex-start; justify-content: center; gap: .7rem; }
.svc--cta::after { display: none; }
:root[data-theme="dark"] .svc--cta { background: linear-gradient(150deg, var(--bg-3), color-mix(in srgb, var(--accent) 10%, var(--bg-3))); color: var(--ink); border-color: color-mix(in srgb, var(--accent) 30%, var(--line)); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .svc--cta { background: linear-gradient(150deg, var(--bg-3), color-mix(in srgb, var(--accent) 10%, var(--bg-3))); color: var(--ink); border-color: color-mix(in srgb, var(--accent) 30%, var(--line)); } }
.svc--cta h3 { font-size: 1.15rem; }
.svc--cta p { color: color-mix(in srgb, var(--bg) 65%, var(--ink)); }
:root[data-theme="dark"] .svc--cta p { color: var(--ink-dim); }

/* Process */
.process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; position: relative; }
.process::before { content: ""; position: absolute; top: 22px; left: 6%; right: 6%; height: 2px; background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 20%, var(--line))); opacity: .5; }
.process__step { position: relative; padding-top: 3.4rem; }
.process__k {
  position: absolute; top: 0; left: 0; width: 46px; height: 46px; border-radius: 50%;
  display: grid; place-items: center; background: var(--bg); color: var(--accent-ink);
  border: 2px solid var(--accent); font-weight: 600; font-size: .95rem;
  box-shadow: 0 0 0 5px var(--bg), 0 0 16px -2px color-mix(in srgb, var(--accent) 60%, transparent);
}
.section--alt .process__k { background: var(--bg-2); box-shadow: 0 0 0 5px var(--bg-2), 0 0 16px -2px color-mix(in srgb, var(--accent) 60%, transparent); }
.process__step h3 { font-family: var(--font-display); font-weight: 700; font-size: 1.1rem; margin-bottom: .45rem; }
.process__step p { color: var(--ink-dim); font-size: .94rem; }

/* Projects */
.projects { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.project {
  background: var(--bg-3); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.6rem 1.5rem; transition: transform .25s, border-color .25s, box-shadow .25s;
  display: flex; flex-direction: column; min-height: 200px;
}
.section--alt .project { background: var(--bg); }
.project:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--accent) 35%, var(--line)); box-shadow: var(--shadow-sm); }
.project__tag { align-self: flex-start; font-size: .64rem; letter-spacing: .14em; color: var(--accent-ink); border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--line)); padding: .25rem .55rem; border-radius: 999px; margin-bottom: 1rem; }
.project h3 { font-family: var(--font-display); font-weight: 700; font-size: 1.2rem; margin-bottom: .5rem; }
.project p { color: var(--ink-dim); font-size: .95rem; flex: 1; }
.project__meta { margin-top: 1rem; font-size: .72rem; color: var(--ink-faint); letter-spacing: .06em; padding-top: .8rem; border-top: 1px solid var(--line); }

/* CTA strip */
.cta-strip { position: relative; overflow: hidden; background: var(--ink); color: var(--bg); padding: 72px 0; }
:root[data-theme="dark"] .cta-strip { background: linear-gradient(120deg, #08110B, #0C1C12); color: var(--ink); border-block: 1px solid var(--line); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .cta-strip { background: linear-gradient(120deg, #08110B, #0C1C12); color: var(--ink); border-block: 1px solid var(--line); } }
.cta-strip::before { content: ""; position: absolute; inset: 0; background: radial-gradient(60% 120% at 85% 20%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 60%); pointer-events: none; }
.cta-strip__inner { position: relative; text-align: center; display: flex; flex-direction: column; align-items: center; gap: .9rem; }
.cta-strip h2 { font-family: var(--font-display); font-weight: 900; font-size: clamp(1.7rem, 1.1rem + 2.4vw, 2.8rem); letter-spacing: -.02em; text-wrap: balance; }
.cta-strip p { color: color-mix(in srgb, var(--bg) 62%, var(--ink)); max-width: 52ch; }
:root[data-theme="dark"] .cta-strip p { color: var(--ink-dim); }
.cta-strip .btn { margin-top: .6rem; }

/* Contact */
.contact { display: grid; grid-template-columns: .85fr 1.15fr; gap: 2.5rem; align-items: start; }
.contact__list { display: flex; flex-direction: column; gap: 1.4rem; }
.contact__list li { display: flex; gap: 1rem; align-items: flex-start; }
.contact__ico { flex: none; width: 44px; height: 44px; display: grid; place-items: center; border-radius: 11px; background: var(--bg-3); border: 1px solid var(--line); color: var(--accent-ink); }
.contact__k { display: block; font-size: .68rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: .15rem; }
.contact__v { font-size: 1.02rem; color: var(--ink); font-weight: 500; }
a.contact__v:hover { color: var(--accent-ink); }
.contact__hint { color: var(--ink-faint); font-size: .72rem; margin-top: 1.4rem; opacity: .8; }
.contact__hint a, .stats__note a { color: var(--accent-ink); text-decoration: underline; text-underline-offset: 2px; }

/* empty / "por confirmar" fields */
[data-field].is-empty, .contact__v.is-empty { color: var(--ink-faint); font-weight: 400; font-style: italic; }
a[data-field].is-empty { pointer-events: none; }

/* social links */
.contact__social { display: flex; align-items: center; gap: .8rem; margin-top: 1.6rem; }
.contact__social[hidden] { display: none; }
.social-links { display: flex; gap: .55rem; flex-wrap: wrap; }
.social-links__item {
  width: 38px; height: 38px; display: grid; place-items: center; border-radius: 10px;
  background: var(--bg-3); border: 1px solid var(--line); color: var(--ink-dim);
  transition: color .2s, border-color .2s, transform .2s, background .2s;
}
.social-links__item:hover { color: var(--accent-ink); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); transform: translateY(-2px); }
.social-links--footer { margin-top: 1rem; }

.site-footer__admin { color: var(--ink-faint); }
.site-footer__admin:hover { color: var(--accent-ink); }

.contact__form { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; background: var(--bg-3); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.8rem; }
.section--alt .contact__form { background: var(--bg); }
.field { display: flex; flex-direction: column; gap: .4rem; }
.field--full { grid-column: 1 / -1; }
.field label { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-dim); }
.field input, .field select, .field textarea {
  background: var(--bg-2); border: 1px solid var(--line); border-radius: 9px;
  padding: .75rem .85rem; color: var(--ink); transition: border-color .2s, box-shadow .2s;
  font-size: .96rem; width: 100%;
}
.field textarea { resize: vertical; }
.field input::placeholder, .field textarea::placeholder { color: var(--ink-faint); }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent); }
.form-status { margin-top: .8rem; color: var(--ok); font-size: .8rem; min-height: 1.1em; }
.form-status.is-error { color: #e5484d; }

/* =========================================================================
   FOOTER
   ========================================================================= */
.site-footer { background: var(--bg-2); border-top: 1px solid var(--line); padding-top: 3.2rem; }
.site-footer__inner { display: grid; grid-template-columns: 1.6fr 1fr 1.2fr; gap: 2.5rem; padding-bottom: 2.5rem; }
.site-footer__blurb { color: var(--ink-dim); font-size: .95rem; max-width: 40ch; margin-top: 1.1rem; }
.site-footer h4 { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint); font-weight: 500; margin-bottom: 1rem; }
.site-footer__nav { display: flex; flex-direction: column; gap: .55rem; }
.site-footer__nav a { color: var(--ink-dim); font-size: .95rem; width: fit-content; }
.site-footer__nav a:hover { color: var(--accent-ink); }
.site-footer__contact p { color: var(--ink-dim); font-size: .95rem; margin-bottom: .5rem; }
.site-footer__contact span { color: var(--ink-faint); }
.site-footer__bottom { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; padding: 1.4rem 0; border-top: 1px solid var(--line); }
.site-footer__bottom p { font-size: .8rem; color: var(--ink-faint); }

/* =========================================================================
   RESPONSIVE
   ========================================================================= */
@media (max-width: 1080px) {
  .services { grid-template-columns: repeat(2, 1fr); }
  .process { grid-template-columns: repeat(2, 1fr); }
  .process::before { display: none; }
  .rail { left: 16px; width: 40px; }
}
@media (max-width: 900px) {
  .nav { display: none; }
  .hamburger { display: flex; }
  .hero__inner { grid-template-columns: 1fr; gap: 2.4rem; }
  .hero__diagram { order: -1; max-width: 440px; }
  .about { grid-template-columns: 1fr; gap: 2rem; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 2rem; }
  .projects { grid-template-columns: repeat(2, 1fr); }
  .contact { grid-template-columns: 1fr; gap: 2rem; }
  .site-footer__inner { grid-template-columns: 1fr 1fr; }
  .site-footer__brand { grid-column: 1 / -1; }
}
@media (max-width: 620px) {
  .rail { display: none; }
  .btn--primary.btn--sm { display: none; }
  .hero { padding-top: 108px; }
  .services { grid-template-columns: 1fr; }
  .process { grid-template-columns: 1fr; }
  .projects { grid-template-columns: 1fr; }
  .contact__form { grid-template-columns: 1fr; padding: 1.3rem; }
  .site-footer__inner { grid-template-columns: 1fr; }
  .hero__specs { gap: 1rem; }
  .hero__specs .spec { border-right: 0; margin-right: 0; padding-right: 0; flex: 1 1 40%; }
}

/* Rail hidden on short/again small — mobile top progress fallback */
@media (max-width: 620px) {
  body::before {
    content: ""; position: fixed; top: 0; left: 0; height: 3px; z-index: 200;
    width: var(--scroll-progress, 0%);
    background: linear-gradient(90deg, var(--accent-hot), var(--accent));
    box-shadow: 0 0 10px var(--accent);
  }
}

/* =========================================================================
   MOTION PREFERENCES
   ========================================================================= */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
  .rail__flow, .sld__flow .flow, .marquee__row, .hero__scroll svg, .status-dot, .rail__pulse::after { animation: none !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
}