/* ═══════════════════════════════════════════════════════════════
   Grupo Serviandina SAS — landing
   Paleta tomada del logo: cian #00A0E7, carbón #1A1A18, cian pálido #CAEDFC
   ═══════════════════════════════════════════════════════════════ */

:root {
  --brand: #00a0e7;
  --brand-dk: #0088c6;
  --brand-ink: #06678f;   /* cian legible sobre fondo claro (AA) */
  --brand-soft: #caedfc;
  --ink: #1a1a18;
  --ink-2: #262b2e;
  --ink-3: #333a3e;
  --txt: #2c3134;
  --muted: #6a7479;
  --muted-lt: #9aa5ab;
  --line: #e2e6e8;
  --line-dk: rgba(255, 255, 255, .14);
  --concrete: #f4f6f7;
  --wa: #25d366;
  --white: #fff;

  --wrap: 1180px;
  --r: 14px;
  --r-sm: 9px;
  --shadow: 0 1px 2px rgba(16, 24, 28, .05), 0 10px 30px -12px rgba(16, 24, 28, .18);
  --shadow-lg: 0 2px 4px rgba(16, 24, 28, .06), 0 26px 60px -20px rgba(16, 24, 28, .3);

  --sans: "Barlow", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --disp: "Barlow Condensed", "Barlow", "Segoe UI", Arial, sans-serif;

  --ease: cubic-bezier(.22, .61, .36, 1);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 90px; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--white);
  color: var(--txt);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.62;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3 {
  font-family: var(--disp);
  color: var(--ink);
  line-height: 1.06;
  letter-spacing: -.01em;
  margin: 0 0 .5em;
  text-wrap: balance;
}
h1 { font-size: clamp(2.7rem, 6.4vw, 4.9rem); font-weight: 700; }
h2 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 700; }
h3 { font-size: 1.35rem; font-weight: 600; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

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

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

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--brand); color: #fff; padding: .8rem 1.2rem; font-weight: 600;
}
.skip:focus { left: 0; }

/* ─────────────────────────────────────────────────── revelado */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.on { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* ─────────────────────────────────────────────────── botones */
.btn {
  --bg: var(--brand);
  --fg: #fff;
  display: inline-flex; align-items: center; justify-content: center; gap: .55rem;
  background: var(--bg); color: var(--fg);
  border: 0; border-radius: 999px;
  padding: .68rem 1.35rem;
  font: 600 .95rem/1 var(--sans);
  letter-spacing: .01em;
  text-decoration: none; cursor: pointer;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
  white-space: nowrap;
}
.btn svg { width: 1.15em; height: 1.15em; flex: none; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 24px -10px rgba(0, 0, 0, .45); }
.btn:active { transform: none; }

.btn--lg { padding: .95rem 1.9rem; font-size: 1.02rem; }
.btn--full { width: 100%; }
.btn--wa { --bg: var(--wa); --fg: #06301a; }
.btn--wa:hover { --bg: #1fbf5c; }
/* texto oscuro sobre cian: el blanco sobre #00A0E7 no alcanza contraste AA */
.btn--brand { --bg: var(--brand); --fg: #06232f; }
.btn--brand:hover { --bg: #29b6f5; }
.btn--ghost {
  --bg: transparent; --fg: #fff;
  border: 1.5px solid rgba(255, 255, 255, .55);
  backdrop-filter: blur(6px);
}
.btn--ghost:hover { --bg: rgba(255, 255, 255, .14); border-color: #fff; }

/* ─────────────────────────────────────────────────── header */
.hdr {
  position: fixed; inset: 0 0 auto; z-index: 90;
  transition: background .3s var(--ease), box-shadow .3s var(--ease), backdrop-filter .3s;
}
.hdr::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(to bottom, rgba(12, 14, 15, .75), rgba(12, 14, 15, 0));
  transition: opacity .3s var(--ease);
}
.hdr.stuck { background: rgba(26, 26, 24, .96); backdrop-filter: blur(10px); box-shadow: 0 1px 0 var(--line-dk); }
.hdr.stuck::before { opacity: 0; }

.hdr__in { display: flex; align-items: center; gap: 1.5rem; min-height: 76px; }
.hdr__logo { flex: none; }
.hdr__logo img { width: 152px; height: auto; }

.nav { margin-left: auto; display: flex; gap: 1.7rem; }
.nav a {
  position: relative;
  color: rgba(255, 255, 255, .88);
  text-decoration: none; font-weight: 500; font-size: .96rem;
  padding: .3rem 0;
  transition: color .2s;
}
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 100%;
  background: var(--brand); transform: scaleX(0); transform-origin: left;
  transition: transform .28s var(--ease);
}
.nav a:hover { color: #fff; }
.nav a:hover::after { transform: scaleX(1); }

.hdr__cta { flex: none; }

.burger {
  display: none; flex: none;
  width: 44px; height: 44px; padding: 0;
  background: none; border: 0; cursor: pointer;
}
.burger span {
  display: block; height: 2px; width: 24px; margin: 5px auto;
  background: #fff; border-radius: 2px;
  transition: transform .3s var(--ease), opacity .2s;
}
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ─────────────────────────────────────────────────── hero */
.hero {
  position: relative;
  min-height: min(100svh, 860px);
  display: flex; align-items: flex-end;
  padding: 8rem 0 3.4rem;
  overflow: hidden;
  background: var(--ink);
}
.hero__bg {
  position: absolute; inset: 0; z-index: 0;
  width: 100%; height: 100%; object-fit: cover; object-position: 50% 42%;
}
.hero__veil {
  position: absolute; inset: 0; z-index: 1;
  background:
    linear-gradient(to top, rgba(11, 13, 14, .93) 4%, rgba(11, 13, 14, .68) 40%, rgba(11, 13, 14, .3) 72%, rgba(11, 13, 14, .55) 100%),
    linear-gradient(to right, rgba(11, 13, 14, .6), rgba(11, 13, 14, 0) 62%);
}
.hero__in { position: relative; z-index: 2; color: #fff; }

.hero__eyebrow {
  display: inline-flex; align-items: center; gap: .6rem;
  margin: 0 0 1.1rem;
  font-size: .95rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase;
  color: var(--brand-soft);
}
.tick { width: 30px; height: 2px; background: var(--brand); border-radius: 2px; }

.hero__h1 { color: #fff; max-width: 20ch; margin-bottom: .35em; }
.hero__h1 em { font-style: normal; color: var(--brand); }

.hero__sub {
  max-width: 56ch;
  font-size: clamp(1.02rem, 1.5vw, 1.18rem);
  color: rgba(255, 255, 255, .85);
  margin-bottom: 2rem;
}
.hero__cta { display: flex; flex-wrap: wrap; gap: .85rem; }

.hero__tags {
  display: flex; flex-wrap: wrap; gap: .5rem 1.6rem;
  margin: 2.6rem 0 0; padding: 1.3rem 0 0;
  border-top: 1px solid rgba(255, 255, 255, .18);
  list-style: none;
  font-size: .88rem; font-weight: 500; letter-spacing: .04em;
  color: rgba(255, 255, 255, .7); text-transform: uppercase;
}

/* ─────────────────────────────────────────────────── cifras */
.stats { background: var(--ink); color: #fff; border-top: 1px solid var(--line-dk); }
.stats__grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1px; background: var(--line-dk);
}
.stat { background: var(--ink); padding: 2.6rem 1.8rem; }
.stat:first-child { padding-left: 0; }
.stat__n {
  font-family: var(--disp); font-size: clamp(2.6rem, 5.2vw, 3.9rem); font-weight: 700;
  line-height: 1; color: var(--brand); letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
}
.stat__u { font-family: var(--disp); font-size: 1.7rem; font-weight: 600; color: var(--brand); margin-left: .18em; }
.stat__l { display: block; margin-top: .7rem; max-width: 26ch; font-size: .95rem; color: rgba(255, 255, 255, .68); }

@media (max-width: 860px) {
  .stats__grid { grid-template-columns: 1fr; }
  .stat, .stat:first-child { padding: 1.9rem 0; }
}

/* ─────────────────────────────────────────────────── secciones */
.sec { padding: clamp(4.2rem, 8vw, 7rem) 0; }
.sec--tight { padding: clamp(3rem, 5vw, 4.5rem) 0; }
.sec--alt { background: var(--concrete); }
.sec--dark { background: var(--ink); color: rgba(255, 255, 255, .78); }
.sec--dark h2, .sec--dark h3 { color: #fff; }

.kicker {
  margin: 0 0 .7rem;
  font-size: .95rem; font-weight: 600; letter-spacing: .13em; text-transform: uppercase;
  color: var(--brand-ink);
}
.kicker--light { color: var(--brand); }

.sechead { max-width: 62ch; margin-bottom: 3rem; }
.sechead__sub { color: var(--muted); font-size: 1.06rem; margin: 0; }
.sechead--light .sechead__sub { color: rgba(255, 255, 255, .7); }
.sechead--light .sechead__sub strong { color: #fff; }

/* ─────────────────────────────────────────────────── split */
.split { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(2rem, 5vw, 4.5rem); align-items: center; }
.split--rev .split__txt { order: 2; }
.split--rev .split__img { order: 1; }
.split__img { margin: 0; }
.split__img img { width: 100%; height: auto; border-radius: var(--r); box-shadow: var(--shadow-lg); }
.split__img--frame img {
  border: 1px solid rgba(255, 255, 255, .16);
  /* la foto es muy vertical: se recorta para no estirar la sección */
  max-height: 600px; object-fit: cover; object-position: 50% 38%;
}

@media (max-width: 880px) {
  .split { grid-template-columns: 1fr; }
  .split--rev .split__txt, .split--rev .split__img { order: unset; }
}

.ticks { list-style: none; margin: 1.6rem 0 0; padding: 0; display: grid; gap: .6rem; }
.ticks li { position: relative; padding-left: 1.75rem; }
.ticks li::before {
  content: ""; position: absolute; left: 0; top: .62em;
  width: 9px; height: 9px; border-radius: 2px;
  background: var(--brand); transform: rotate(45deg);
}
.ticks--sm { margin-top: 1.1rem; font-size: .93rem; color: var(--muted); gap: .45rem; }
.ticks--sm li::before { width: 7px; height: 7px; top: .6em; }

/* ─────────────────────────────────────────────────── tarjetas de servicio */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.6rem; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r);
  overflow: hidden; display: flex; flex-direction: column;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: transparent; }
.card__img { aspect-ratio: 16 / 10; overflow: hidden; background: var(--ink-3); }
.card__img img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.card:hover .card__img img { transform: scale(1.05); }
.card__body { padding: 1.6rem 1.5rem 1.8rem; flex: 1; }
.card__body p { color: var(--muted); font-size: .97rem; }

@media (max-width: 940px) { .cards { grid-template-columns: 1fr; } }

.chips {
  display: flex; flex-wrap: wrap; gap: .55rem;
  list-style: none; margin: 2.4rem 0 0; padding: 0;
}
.chips li {
  background: #fff; border: 1px solid var(--line); border-radius: 999px;
  padding: .42rem 1rem; font-size: .87rem; color: var(--muted);
}

/* ─────────────────────────────────────────────────── trabajo en altura */
.altura {
  background: var(--ink-2); color: rgba(255, 255, 255, .76);
  padding: clamp(4.2rem, 8vw, 6.5rem) 0;
  position: relative;
}
.altura h2 { color: #fff; }
.altura .btn { margin-top: 1.9rem; }

/* ─────────────────────────────────────────────────── galería */
.filtros { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1.9rem; }
.filtro {
  background: #fff; border: 1px solid var(--line); border-radius: 999px;
  padding: .5rem 1.15rem; font: 500 .92rem/1 var(--sans); color: var(--muted);
  cursor: pointer; transition: all .22s var(--ease);
}
.filtro:hover { border-color: var(--brand); color: var(--brand-ink); }
.filtro.is-on { background: var(--ink); border-color: var(--ink); color: #fff; }

.galeria {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 210px;
  grid-auto-flow: dense;   /* rellena los huecos que dejan las piezas anchas/altas */
  gap: 14px;
}
.gitem {
  position: relative; margin: 0; overflow: hidden;
  border-radius: var(--r-sm); cursor: pointer;
  background: var(--ink-3);
  grid-row: span 1;
}
.gitem--tall { grid-row: span 2; }
.gitem--wide { grid-column: span 2; }
.gitem img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s var(--ease); }
.gitem::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(10, 12, 13, .5) 0%, rgba(10, 12, 13, 0) 60%);
  opacity: 0; transition: opacity .35s var(--ease);
}
.gitem:hover img, .gitem:focus-visible img { transform: scale(1.06); }
.gitem:hover::after, .gitem:focus-visible::after { opacity: 1; }
.gitem[hidden] { display: none; }

.galeria__vacio { margin-top: 1.5rem; color: var(--muted); }

@media (max-width: 900px) {
  .galeria { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 190px; }
}
@media (max-width: 560px) {
  .galeria { grid-template-columns: 1fr; grid-auto-rows: 220px; }
  .gitem--wide { grid-column: span 1; }
  .gitem--tall { grid-row: span 1; }
}

/* ─────────────────────────────────────────────────── países */
/* las líneas van por celda (box-shadow) y no por el fondo de la rejilla:
   así la celda sobrante de la última fila no queda pintada */
.paises { display: grid; grid-template-columns: repeat(4, 1fr); }
.pais {
  display: flex; flex-direction: column; align-items: flex-start;
  background: var(--ink); padding: 1.7rem 1.5rem;
  box-shadow: 0 0 0 1px var(--line-dk);
  transition: background .3s var(--ease);
}
.pais:hover { background: var(--ink-3); }
.pais__cc {
  display: inline-block; margin-bottom: .8rem;
  font: 700 .78rem/1 var(--sans); letter-spacing: .12em;
  color: var(--brand); border: 1px solid rgba(0, 160, 231, .4);
  border-radius: 4px; padding: .28rem .5rem;
}
.pais h3 { font-size: 1.4rem; margin: 0 0 .35rem; }
.pais p { font-size: .9rem; color: rgba(255, 255, 255, .6); margin: 0 0 .9rem; }
.pais__m2 {
  margin-top: auto;        /* alinea los m² al pie de todas las tarjetas */
  font-family: var(--disp);
  font-size: 1.5rem; font-weight: 700; color: #fff;
}

@media (max-width: 1000px) { .paises { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) {
  .pais { padding: 1.3rem 1.1rem; }
  .pais h3 { font-size: 1.2rem; }
  .pais p { font-size: .85rem; }
}
@media (max-width: 360px) { .paises { grid-template-columns: 1fr; } }

/* ─────────────────────────────────────────────────── proceso */
.pasos { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.6rem; counter-reset: p; }
.paso { border-top: 3px solid var(--ink); padding-top: 1.3rem; }
.paso__n { font-family: var(--disp); font-size: 1.05rem; font-weight: 700; letter-spacing: .1em; color: var(--brand-ink); }
.paso h3 { margin: .45rem 0 .5rem; }
.paso p { font-size: .95rem; color: var(--muted); }

@media (max-width: 900px) { .pasos { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .pasos { grid-template-columns: 1fr; } }

/* ─────────────────────────────────────────────────── logos de clientes */
.logos {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(6, 1fr);
  border-radius: var(--r); overflow: hidden;
}
.logos li {
  background: #fff; display: grid; place-items: center;
  padding: 1.5rem 1.1rem; min-height: 108px;
  box-shadow: 0 0 0 1px var(--line);
}
.logos img {
  max-height: 44px; width: auto; max-width: 100%;
  filter: grayscale(.9); opacity: .85;
  transition: filter .3s var(--ease), opacity .3s var(--ease);
}
.logos li:hover img { filter: none; opacity: 1; }

@media (max-width: 900px) { .logos { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 560px) {
  .logos li { padding: 1.1rem .7rem; min-height: 92px; }
  .logos img { max-height: 38px; }
}
@media (max-width: 360px) { .logos { grid-template-columns: repeat(2, 1fr); } }

/* ─────────────────────────────────────────────────── contacto */
.contacto { display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(2rem, 5vw, 4rem); align-items: start; }
.contacto__intro { color: rgba(255, 255, 255, .7); max-width: 46ch; margin-bottom: 2rem; }

.hp { position: absolute !important; left: -9999px; opacity: 0; height: 0; width: 0; }

.f2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 1rem; }
@media (max-width: 620px) { .f2 { grid-template-columns: 1fr; } }

.fld { margin: 0 0 1.05rem; display: flex; flex-direction: column; gap: .4rem; }
.fld label { font-size: .85rem; font-weight: 600; color: rgba(255, 255, 255, .8); letter-spacing: .02em; }
.fld label span { color: var(--brand); }
.fld input, .fld select, .fld textarea {
  width: 100%;
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: var(--r-sm);
  padding: .78rem .95rem;
  color: #fff;
  font: 400 1rem/1.4 var(--sans);
  transition: border-color .2s, background .2s;
}
.fld textarea { resize: vertical; min-height: 110px; }
.fld select { appearance: none; cursor: pointer; padding-right: 2.4rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath fill='%239aa5ab' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 1rem center; background-size: 11px;
}
.fld select option { background: var(--ink-2); color: #fff; }
.fld ::placeholder { color: var(--muted-lt); }
.fld input:focus, .fld select:focus, .fld textarea:focus {
  outline: none; border-color: var(--brand); background: rgba(0, 160, 231, .08);
}
.fld input:user-invalid, .fld textarea:user-invalid { border-color: #ff7a6b; }

#submit { margin-top: .5rem; }
#submit[disabled] { opacity: .6; cursor: progress; }

.formmsg { margin: 1rem 0 0; font-size: .95rem; min-height: 1.4em; }
.formmsg.ok { color: #6ee7a8; }
.formmsg.err { color: #ff9a8d; }

.contacto__data { display: grid; gap: .8rem; }
.dato {
  display: flex; align-items: center; gap: 1rem;
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--r); padding: 1.05rem 1.2rem;
  text-decoration: none;
  transition: border-color .25s var(--ease), background .25s var(--ease), transform .25s var(--ease);
}
a.dato:hover { border-color: var(--brand); background: rgba(0, 160, 231, .09); transform: translateX(3px); }
.dato__ic {
  flex: none; width: 42px; height: 42px; border-radius: 10px;
  display: grid; place-items: center;
  background: rgba(255, 255, 255, .07); color: var(--brand);
}
.dato__ic svg { width: 21px; height: 21px; }
.dato__ic--wa { background: rgba(37, 211, 102, .14); color: var(--wa); }
.dato__k { display: block; font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted-lt); }
.dato__v { display: block; font-weight: 600; color: #fff; font-size: 1.02rem; }

.tarjeta {
  margin-top: .8rem; padding: 1.3rem 1.4rem;
  border-left: 3px solid var(--brand);
  background: rgba(255, 255, 255, .04);
  border-radius: 0 var(--r) var(--r) 0;
}
.tarjeta__k { margin: 0 0 .35rem; font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted-lt); }
.tarjeta__n { margin: 0; font-family: var(--disp); font-size: 1.5rem; font-weight: 600; color: #fff; }
.tarjeta__e { margin: 0; font-size: .9rem; color: rgba(255, 255, 255, .6); }

@media (max-width: 900px) { .contacto { grid-template-columns: 1fr; } }

/* ─────────────────────────────────────────────────── footer */
.ftr { background: #131514; color: rgba(255, 255, 255, .62); padding-top: 3.6rem; }
.ftr__in { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 2.5rem; padding-bottom: 3rem; }
.ftr__brand img { width: 168px; height: auto; margin-bottom: 1.2rem; }
.ftr__brand p { font-size: .93rem; max-width: 42ch; }
.ftr h3 { font-size: .82rem; letter-spacing: .14em; text-transform: uppercase; color: #fff; font-family: var(--sans); font-weight: 600; margin-bottom: 1rem; }
.ftr__nav, .ftr__cont { display: flex; flex-direction: column; gap: .55rem; align-items: flex-start; }
.ftr__nav a, .ftr__cont a { text-decoration: none; font-size: .94rem; transition: color .2s; }
.ftr__nav a:hover, .ftr__cont a:hover { color: var(--brand); }
.ftr__legal { border-top: 1px solid rgba(255, 255, 255, .1); padding: 1.3rem 0; }
.ftr__legal p { margin: 0; font-size: .85rem; color: rgba(255, 255, 255, .42); }

@media (max-width: 780px) { .ftr__in { grid-template-columns: 1fr; gap: 2rem; } }

/* ─────────────────────────────────────────────────── botón flotante */
.fab {
  position: fixed; right: clamp(1rem, 3vw, 1.8rem); bottom: clamp(1rem, 3vw, 1.8rem);
  z-index: 80;
  width: 58px; height: 58px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--wa); color: #06301a;
  box-shadow: 0 8px 26px -6px rgba(37, 211, 102, .6);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.fab svg { width: 30px; height: 30px; }
.fab:hover { transform: scale(1.07); box-shadow: 0 12px 32px -6px rgba(37, 211, 102, .75); }

/* ─────────────────────────────────────────────────── lightbox */
.lb {
  position: fixed; inset: 0; z-index: 120;
  display: grid; grid-template-columns: auto 1fr auto; align-items: center;
  gap: .5rem; padding: clamp(1rem, 4vw, 3rem);
  background: rgba(9, 11, 12, .95);
  animation: fade .22s var(--ease);
}
.lb[hidden] { display: none; }
@keyframes fade { from { opacity: 0; } }

.lb__fig { margin: 0; display: grid; justify-items: center; gap: .9rem; min-width: 0; }
.lb__fig img {
  max-width: 100%; max-height: 78vh; width: auto;
  border-radius: var(--r-sm); box-shadow: 0 30px 80px -20px rgba(0, 0, 0, .9);
}

.lb__x, .lb__nav {
  background: rgba(255, 255, 255, .1); border: 1px solid rgba(255, 255, 255, .2);
  color: #fff; cursor: pointer; border-radius: 50%;
  display: grid; place-items: center;
  transition: background .2s, transform .2s;
}
.lb__x:hover, .lb__nav:hover { background: rgba(255, 255, 255, .22); }
.lb__nav { width: 50px; height: 50px; font-size: 2rem; line-height: 0; padding-bottom: 5px; }
.lb__x { position: absolute; top: 1.1rem; right: 1.1rem; width: 44px; height: 44px; font-size: 1.8rem; line-height: 0; padding-bottom: 4px; }

@media (max-width: 640px) {
  .lb { grid-template-columns: 1fr; grid-template-rows: 1fr auto; }
  .lb__nav { position: static; }
  .lb__nav--prev { grid-row: 2; justify-self: start; }
  .lb__nav--next { grid-row: 2; grid-column: 1; justify-self: end; }
}

/* ─────────────────────────────────────────────────── móvil: menú */
@media (max-width: 1000px) {
  .hdr__cta { display: none; }
  .burger { display: block; }
  .nav {
    position: fixed; inset: 76px 0 auto;
    flex-direction: column; gap: 0;
    background: rgba(20, 22, 21, .985); backdrop-filter: blur(12px);
    padding: .5rem 0 1.4rem;
    border-top: 1px solid var(--line-dk);
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: opacity .25s var(--ease), transform .25s var(--ease);
    max-height: calc(100svh - 76px); overflow-y: auto;
  }
  .nav.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav a { padding: .95rem 1.25rem; font-size: 1.05rem; border-bottom: 1px solid rgba(255, 255, 255, .07); }
  .nav a::after { display: none; }
  body.locked { overflow: hidden; }
}