/* =========================================================
   Science in Sport Ecuador — Landing
   Conforme a "SiS Brand DNA v.01 Summer 2025":
   · Colores  : SiS Black #070909, Bolt Yellow #F8D930, Concrete #A9A9A9,
                Silver #BCBCBC, White. Gradientes Sunrise #F1B90A / Powder #FBF6E0.
   · Tipografía: Titulares GUSTAVO Bold (MAYÚSCULAS, interlineado 0.85).
                Cuerpo CoFo Sans VF (interlineado 1.2). Fallback de sistema
                según guía: Arial Black / Arial. Mientras no se licencien las
                fuentes de marca se usa Archivo Expanded + Inter como sustitutos
                de forma equivalente (ver @font-face abajo para activarlas).
   · Packshots: fondo White → SiS Silver al 35 % de opacidad, nunca blanco puro.
   ========================================================= */

/* --- Fuentes de marca (activar cuando se tengan los archivos licenciados) ---
@font-face { font-family: "Gustavo";   src: url("fonts/Gustavo-Bold.woff2") format("woff2");        font-weight: 700; font-style: normal; font-display: swap; }
@font-face { font-family: "Gustavo";   src: url("fonts/Gustavo-BoldItalic.woff2") format("woff2");  font-weight: 700; font-style: italic; font-display: swap; }
@font-face { font-family: "CoFo Sans"; src: url("fonts/CoFoSansVF.woff2") format("woff2");           font-weight: 100 900; font-display: swap; }
*/

:root {
  /* Paleta primaria */
  --sis-black: #070909;
  --sis-bolt: #F8D930;
  --sis-concrete: #A9A9A9;
  --sis-silver: #BCBCBC;
  --sis-white: #FFFFFF;
  /* Gradientes */
  --sis-sunrise: #F1B90A;
  --sis-powder: #FBF6E0;
  /* Colores de sabor (single / multi-flavour profiles) */
  --fl-apple: #99E031;
  --fl-orange: #FF7A00;
  --fl-lemon: #F8D930;
  --fl-citrus: #E4E82C;
  --fl-tropical: #F9C300;
  --fl-raspberry: #D5006D;
  --fl-mint: #A4F2D3;
  --fl-banana: #F5E169;
  --fl-chocolate: #5A3A22;

  /* Derivados (tintes de la paleta, no colores nuevos) */
  --ink-70: rgba(7, 9, 9, .70);
  --ink-55: rgba(7, 9, 9, .55);
  --ink-15: rgba(7, 9, 9, .15);
  --surface-dark: rgba(255, 255, 255, .05);
  --line-dark: rgba(255, 255, 255, .10);
  --packshot: linear-gradient(180deg, #FFFFFF 0%, rgba(188, 188, 188, .35) 100%);

  /* Tipografía */
  --font-display: "Gustavo", "Archivo", "Arial Black", Arial, sans-serif;
  --font-body: "CoFo Sans", "Inter", Arial, Helvetica, sans-serif;

  --radius: 12px;
  --radius-sm: 6px;
  --container: 1200px;
  --gutter: clamp(16px, 4vw, 40px);
  --nav-h: 76px;
  --shadow: 0 24px 48px -28px rgba(7, 9, 9, .45);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 12px); }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.2;               /* Guía: cuerpo 1.2x */
  letter-spacing: .01em;          /* Guía: +10 tracking */
  color: var(--sis-black);
  background: var(--sis-black);
  -webkit-font-smoothing: antialiased;
  font-kerning: normal; text-rendering: optimizeLegibility; hyphens: none;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, p, dl, dd, figure { margin: 0; }
p { line-height: 1.45; }        /* legibilidad web en párrafos largos */

.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }

/* ---------- Tipografía ---------- */
.display {
  font-family: var(--font-display);
  font-weight: 900; font-stretch: 125%;
  text-transform: uppercase;      /* Guía: titulares SOLO en mayúsculas */
  letter-spacing: -0.01em;
  line-height: .92;               /* Guía: ~0.85x (0.92 para que los acentos no choquen) */
  font-size: clamp(2.1rem, 4.4vw, 3.4rem);
  color: var(--sis-white);
  hyphens: none;
}
.display--md { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
.hl { color: var(--sis-bolt); }
.hl-dark { color: var(--sis-black); background: linear-gradient(transparent 60%, var(--sis-bolt) 60%); padding-inline: .08em; }
.eyebrow {                        /* Guía: "highlight details" — Black, +50 tracking, 1.0 */
  font-family: var(--font-body); font-weight: 900;
  text-transform: uppercase; letter-spacing: .05em; line-height: 1;
  font-size: .8rem; color: var(--sis-bolt); margin-bottom: 16px;
}
.eyebrow--dark { color: var(--ink-55); }
.lead { font-size: clamp(1.05rem, 1.3vw, 1.15rem); color: var(--sis-concrete); max-width: 60ch; }
.lead--muted { color: var(--ink-70); }
.strapline {
  font-family: var(--font-display); font-weight: 900; font-stretch: 125%;
  text-transform: uppercase; font-size: .95rem; letter-spacing: .02em; color: var(--sis-bolt);
  margin-bottom: 18px;
}

.section-head { text-align: center; margin-bottom: clamp(36px, 6vw, 64px); }
.section-head .lead { margin-inline: auto; margin-top: 18px; }
.section-head--left { text-align: left; }
.products--light .section-head .display { color: var(--sis-black); }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 24px;
  font-family: var(--font-body); font-weight: 900; font-size: .9rem;
  letter-spacing: .05em; text-transform: uppercase; line-height: 1;
  border-radius: var(--radius-sm); border: 2px solid transparent;
  transition: transform .15s ease, background .15s ease, color .15s ease, border-color .15s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn--primary { background: var(--sis-bolt); color: var(--sis-black); border-color: var(--sis-bolt); }
.btn--primary:hover { background: var(--sis-white); border-color: var(--sis-white); }
.btn--ghost { background: transparent; color: var(--sis-white); border-color: var(--sis-white); }
.btn--ghost:hover { background: var(--sis-white); color: var(--sis-black); }
.btn--outline { background: transparent; color: var(--sis-black); border-color: var(--sis-black); }
.btn--outline:hover { background: var(--sis-black); color: var(--sis-white); }
.products--dark .btn--outline { color: var(--sis-white); border-color: var(--sis-white); }
.products--dark .btn--outline:hover { background: var(--sis-white); color: var(--sis-black); }
.btn--sm { padding: 10px 16px; font-size: .8rem; }
.btn--block { width: 100%; }
.ico { width: 18px; height: 18px; fill: currentColor; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(7, 9, 9, .92);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-dark);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: var(--nav-h); gap: 24px; }
/* Logo secundario (horizontal) en blanco — la guía lo reserva para cuando el primario no es práctico (cabeceras) */
.brand { display: inline-flex; align-items: center; gap: 18px; color: var(--sis-white); }
.brand__logo { height: 38px; width: auto; }
.brand__market {
  font-family: var(--font-body); font-weight: 900; text-transform: uppercase; letter-spacing: .05em; line-height: 1;
  font-size: .75rem; color: var(--sis-bolt);
  padding-left: 18px; border-left: 1px solid var(--line-dark);
}
.nav__links { display: flex; align-items: center; gap: 28px; }
.nav__links > a:not(.btn) {
  font-family: var(--font-body); font-weight: 900; text-transform: uppercase; letter-spacing: .05em; font-size: .8rem;
  color: var(--sis-concrete); position: relative; padding-block: 6px;
}
.nav__links > a:not(.btn)::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: var(--sis-bolt);
  transform: scaleX(0); transform-origin: left; transition: transform .2s ease;
}
.nav__links > a:not(.btn):hover::after, .nav__links > a.is-active::after { transform: scaleX(1); }
.nav__links > a:not(.btn):hover, .nav__links > a.is-active { color: var(--sis-white); }
.burger { display: none; background: none; border: 0; width: 44px; height: 44px; padding: 10px; flex-direction: column; justify-content: space-between; }
.burger span { display: block; height: 2px; background: var(--sis-white); transition: transform .2s, opacity .2s; }

@media (max-width: 900px) {
  .burger { display: flex; }
  .nav__links {
    position: fixed; inset: var(--nav-h) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--sis-black); border-bottom: 1px solid var(--line-dark);
    padding: 8px var(--gutter) 20px;
    transform: translateY(-8px); opacity: 0; pointer-events: none; transition: .2s ease;
  }
  .nav__links.is-open { transform: none; opacity: 1; pointer-events: auto; }
  .nav__links > a:not(.btn) { padding: 14px 0; border-bottom: 1px solid var(--line-dark); font-size: .95rem; }
  .nav__cta { margin-top: 16px; justify-content: center; }
  .burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(11px) rotate(45deg); }
  .burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-11px) rotate(-45deg); }
}
@media (max-width: 480px) { .brand__market { display: none; } .brand__logo { height: 28px; } }

/* ---------- Hero ---------- */
.hero { background: var(--sis-black); color: var(--sis-white); padding-block: clamp(20px, 3vw, 36px) clamp(56px, 8vw, 96px); }
.hero__banner { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); background: var(--sis-black); }
.hero__banner img { width: 100%; }
.hero__body {
  display: grid; grid-template-columns: 1.3fr 1fr; gap: clamp(32px, 6vw, 80px);
  align-items: start; margin-top: clamp(36px, 6vw, 64px);
}
.hero__copy .lead { margin-top: 22px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero__stats { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.hero__stats li {
  background: var(--surface-dark); border: 1px solid var(--line-dark); border-radius: var(--radius-sm);
  padding: 18px 18px 16px; display: flex; flex-direction: column-reverse; gap: 6px;
}
.hero__stats strong { font-family: var(--font-display); font-weight: 900; font-stretch: 125%; text-transform: uppercase; font-size: 1.35rem; line-height: .9; color: var(--sis-bolt); }
.hero__stats span { font-size: .8rem; color: var(--sis-concrete); line-height: 1.3; }

@media (max-width: 900px) { .hero__body { grid-template-columns: 1fr; } }
@media (max-width: 480px) {
  .hero__stats { gap: 10px; }
  .hero__stats li { padding: 14px; }
  .hero__stats strong { font-size: 1.15rem; }
}

/* ---------- Categorías ---------- */
.cats { background: var(--sis-black); color: var(--sis-white); padding-block: clamp(64px, 9vw, 110px); border-top: 1px solid var(--line-dark); }
.cats__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cat {
  display: flex; flex-direction: column;
  background: var(--surface-dark); border: 1px solid var(--line-dark); border-radius: var(--radius);
  overflow: hidden; transition: transform .2s ease, border-color .2s ease;
}
.cat:hover { transform: translateY(-4px); border-color: var(--sis-bolt); }
.cat__img { aspect-ratio: 4 / 3; position: relative; overflow: hidden; background: var(--packshot); }
.cat__img img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; padding: 24px; transition: transform .3s ease; }
.cat:hover .cat__img img { transform: scale(1.05); }
.cat__body { padding: 22px 24px 26px; position: relative; }
.cat__num { position: absolute; right: 22px; top: 22px; font-family: var(--font-body); font-weight: 900; color: var(--sis-bolt); font-size: .8rem; letter-spacing: .05em; }
.cat__body h3 { font-family: var(--font-display); font-weight: 900; font-stretch: 125%; text-transform: uppercase; font-size: 1.6rem; line-height: .9; }
.cat__body p { color: var(--sis-concrete); margin-top: 10px; font-size: .95rem; }
.cat__link { display: inline-block; margin-top: 16px; font-weight: 900; text-transform: uppercase; letter-spacing: .05em; color: var(--sis-bolt); font-size: .8rem; }

@media (max-width: 900px) { .cats__grid { grid-template-columns: 1fr; } .cat { flex-direction: row; } .cat__img { width: 38%; aspect-ratio: auto; } .cat__body { flex: 1; } }
@media (max-width: 480px) { .cat { flex-direction: column; } .cat__img { width: 100%; aspect-ratio: 16 / 10; } }

/* ---------- Productos ---------- */
.products { padding-block: clamp(64px, 9vw, 110px); }
.products--light { background: var(--sis-white); color: var(--sis-black); }
.products--dark { background: var(--sis-black); color: var(--sis-white); }
.products--dark .display { color: var(--sis-white); }

.product {
  display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 5vw, 64px); align-items: center;
  padding-block: clamp(28px, 4vw, 48px);
}
.product + .product { border-top: 1px solid var(--ink-15); margin-top: clamp(20px, 3vw, 32px); }
.product--flip .product__media { order: 2; }
/* Packshot: White → SiS Silver 35 % (guía "Product catalogue photography") */
.product__stage {
  aspect-ratio: 1 / 1; border-radius: var(--radius); position: relative; overflow: hidden;
  background: var(--packshot); border: 1px solid var(--ink-15);
}
.product__stage img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; padding: 8%; transition: opacity .2s ease; }
.product__stage img.is-swapping { opacity: 0; }
.thumbs { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }
.thumb {
  width: 72px; height: 72px; border-radius: var(--radius-sm); padding: 6px;
  background: var(--packshot); border: 2px solid var(--sis-silver); display: grid; place-items: center; overflow: hidden;
  transition: border-color .15s ease, transform .15s ease;
}
.thumb img { width: 100%; height: 100%; object-fit: contain; }
.thumb:hover { transform: translateY(-2px); }
.thumb.is-active { border-color: var(--sis-bolt); }
.products--dark .thumb { border-color: var(--line-dark); }
.products--dark .thumb.is-active { border-color: var(--sis-bolt); }

.badge {
  display: inline-block; font-weight: 900; text-transform: uppercase; letter-spacing: .05em; line-height: 1;
  font-size: .72rem; padding: 6px 10px; border-radius: 4px; margin-bottom: 14px;
  background: var(--sis-bolt); color: var(--sis-black);
}
.product__name { font-family: var(--font-display); font-weight: 900; font-stretch: 125%; text-transform: uppercase; font-size: clamp(1.6rem, 2.8vw, 2.2rem); line-height: .9; }
.product__tag { font-weight: 900; text-transform: uppercase; letter-spacing: .05em; font-size: .85rem; color: var(--ink-55); margin-top: 10px; line-height: 1.2; }
.products--dark .product__tag { color: var(--sis-concrete); }
.product__desc { margin-top: 18px; color: var(--ink-70); max-width: 58ch; }
.products--dark .product__desc { color: var(--sis-concrete); }

.specs { display: grid; gap: 10px; margin-top: 22px; }
.specs > div { display: grid; grid-template-columns: 120px 1fr; gap: 12px; font-size: .92rem; }
.specs dt { font-weight: 900; text-transform: uppercase; letter-spacing: .05em; font-size: .72rem; color: var(--ink-55); padding-top: 2px; }
.specs dd { color: var(--ink-70); }
.products--dark .specs dt { color: var(--sis-concrete); }
.products--dark .specs dd { color: var(--sis-concrete); }

.flavors { margin-top: 22px; }
.flavors__label { display: block; font-weight: 900; text-transform: uppercase; letter-spacing: .05em; font-size: .72rem; color: var(--ink-55); margin-bottom: 10px; }
.products--dark .flavors__label { color: var(--sis-concrete); }
.flavors ul { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 12px; border-radius: 4px; font-weight: 700; font-size: .85rem;
  background: var(--sis-white); color: var(--sis-black); border: 1px solid var(--sis-silver);
}
.chip::before { content: ""; width: 10px; height: 10px; border-radius: 50%; background: var(--sis-silver); }
/* Perfiles de sabor según guía */
.chip--apple::before { background: var(--fl-apple); }
.chip--lemon-lime::before { background: linear-gradient(135deg, var(--fl-lemon), var(--fl-apple)); }
.chip--orange::before { background: var(--fl-orange); }
.chip--tropical::before { background: linear-gradient(135deg, var(--fl-tropical), var(--fl-apple)); }
.chip--raspberry::before { background: var(--fl-raspberry); }
.chip--lemon-mint::before { background: linear-gradient(135deg, var(--fl-lemon), var(--fl-mint)); }
.chip--banana::before { background: var(--fl-banana); }
.chip--chocolate::before { background: var(--fl-chocolate); }
.chip--btn { border: 2px solid var(--sis-silver); transition: border-color .15s, transform .15s; }
.chip--btn:hover { transform: translateY(-1px); }
.chip--btn.is-active { border-color: var(--sis-bolt); box-shadow: 0 0 0 3px rgba(248, 217, 48, .3); }
.products--dark .chip { background: var(--surface-dark); color: var(--sis-white); border-color: var(--line-dark); }

.product__buy { margin-top: 28px; display: flex; flex-wrap: wrap; align-items: center; gap: 18px 28px; }
.price { font-family: var(--font-display); font-weight: 900; font-stretch: 125%; font-size: 2.2rem; line-height: 1; display: inline-flex; align-items: baseline; gap: 2px; }
.price__cur { font-size: 1.2rem; color: var(--ink-55); }
.products--dark .price__cur { color: var(--sis-concrete); }
.price__unit { font-family: var(--font-body); font-weight: 900; font-size: .7rem; color: var(--ink-55); margin-left: 8px; letter-spacing: .05em; text-transform: uppercase; }
.products--dark .price__unit { color: var(--sis-concrete); }
.product__actions { display: flex; flex-wrap: wrap; gap: 10px; }

@media (max-width: 900px) {
  .product { grid-template-columns: 1fr; }
  .product--flip .product__media { order: 0; }
  .product__stage { max-width: 520px; margin-inline: auto; }
  .thumbs { justify-content: center; }
}
@media (max-width: 480px) {
  .specs > div { grid-template-columns: 1fr; gap: 2px; }
  .product__actions .btn { flex: 1 1 100%; }
  .product__buy { gap: 16px; }
}

/* Polvos: dos tarjetas */
.powders { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.pcard { background: var(--sis-white); border: 1px solid var(--ink-15); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; }
.pcard__media { aspect-ratio: 5 / 4; position: relative; overflow: hidden; background: var(--packshot); border-bottom: 1px solid var(--ink-15); }
.pcard__media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; padding: 6%; }
.pcard__info { padding: clamp(22px, 3vw, 34px); flex: 1; display: flex; flex-direction: column; }
.pcard__info .product__name { font-size: clamp(1.5rem, 2.2vw, 1.9rem); }
.pcard__info .product__buy { margin-top: auto; padding-top: 26px; }
@media (max-width: 900px) { .powders { grid-template-columns: 1fr; } }

/* ---------- Por qué SiS (gradiente Sunrise → Powder con grano, según guía) ---------- */
.why {
  position: relative; isolation: isolate; color: var(--sis-black);
  background: linear-gradient(160deg, var(--sis-sunrise) 0%, var(--sis-bolt) 45%, var(--sis-powder) 100%);
  padding-block: clamp(64px, 9vw, 110px);
}
.why::before {
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: .35; mix-blend-mode: soft-light; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.why .display { color: var(--sis-black); }
.why .eyebrow { color: var(--sis-black); }
.why .hl { color: var(--sis-bolt); background: var(--sis-black); padding-inline: .1em; }
.why__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.why__item { background: var(--sis-black); color: var(--sis-white); border-radius: var(--radius); padding: 26px 24px 28px; }
.why__num { display: block; font-weight: 900; color: var(--sis-bolt); font-size: .8rem; letter-spacing: .05em; margin-bottom: 18px; }
.why__item h3 { font-family: var(--font-display); font-weight: 900; font-stretch: 125%; text-transform: uppercase; font-size: 1.25rem; line-height: .9; }
.why__item p { color: var(--sis-concrete); margin-top: 12px; font-size: .92rem; }
@media (max-width: 900px) { .why__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .why__grid { grid-template-columns: 1fr; } }

/* ---------- Contacto ---------- */
.contact { background: var(--sis-white); padding-block: clamp(64px, 9vw, 110px); }
.contact__grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(32px, 6vw, 80px); align-items: start; }
.contact .display { color: var(--sis-black); }
.contact .lead { margin-top: 18px; }
.contact__list { display: grid; gap: 12px; margin-top: 30px; }
.contact__list li { display: flex; flex-direction: column; gap: 4px; padding: 14px 18px; background: var(--packshot); border-radius: var(--radius-sm); border: 1px solid var(--ink-15); }
.contact__label { font-weight: 900; text-transform: uppercase; letter-spacing: .05em; font-size: .72rem; color: var(--ink-55); }
.contact__list a { font-family: var(--font-display); font-weight: 900; font-stretch: 125%; font-size: 1.1rem; color: var(--sis-black); }
.contact__list a:hover { text-decoration: underline; text-decoration-color: var(--sis-bolt); text-decoration-thickness: 3px; }
.contact__note { margin-top: 24px; color: var(--ink-70); font-size: .95rem; max-width: 60ch; }
.social { margin-top: 30px; }
.social__row { display: flex; flex-wrap: wrap; gap: 10px; }
.social__btn {
  display: inline-flex; align-items: center; gap: 10px; padding: 10px 16px;
  background: var(--sis-black); color: var(--sis-white); border-radius: var(--radius-sm); font-weight: 700; font-size: .9rem;
  transition: background .15s ease, color .15s ease, transform .15s ease;
}
.social__btn svg { width: 20px; height: 20px; fill: var(--sis-bolt); transition: fill .15s ease; }
.social__btn:hover { background: var(--sis-bolt); color: var(--sis-black); transform: translateY(-2px); }
.social__btn:hover svg { fill: var(--sis-black); }

.contact__form { background: var(--sis-black); color: var(--sis-white); border-radius: var(--radius); padding: clamp(24px, 3vw, 36px); display: grid; gap: 16px; }
.contact__form h3 { font-family: var(--font-display); font-weight: 900; font-stretch: 125%; text-transform: uppercase; font-size: 1.7rem; line-height: .9; }
.contact__form > p { color: var(--sis-concrete); font-size: .95rem; margin-top: -4px; }
.contact__form label { display: grid; gap: 6px; }
.contact__form label span { font-weight: 900; text-transform: uppercase; letter-spacing: .05em; font-size: .72rem; color: var(--sis-concrete); }
.contact__form input, .contact__form select, .contact__form textarea {
  font: inherit; width: 100%; padding: 12px 14px; border-radius: var(--radius-sm);
  border: 1.5px solid var(--line-dark); background: var(--surface-dark); color: var(--sis-white); transition: border-color .15s ease;
}
.contact__form select option { color: var(--sis-black); }
.contact__form input::placeholder, .contact__form textarea::placeholder { color: rgba(255,255,255,.4); }
.contact__form input:focus, .contact__form select:focus, .contact__form textarea:focus { outline: none; border-color: var(--sis-bolt); }
.contact__form textarea { resize: vertical; min-height: 110px; }
.contact__form input.is-invalid { border-color: var(--fl-raspberry); }
.contact__form small { color: var(--sis-concrete); text-align: center; }
.contact__form small a { text-decoration: underline; text-decoration-color: var(--sis-bolt); }
@media (max-width: 900px) { .contact__grid { grid-template-columns: 1fr; } }

/* ---------- Footer (logo primario en blanco, según guía) ---------- */
.footer { background: var(--sis-black); color: var(--sis-concrete); padding-block: 48px 36px; border-top: 1px solid var(--line-dark); }
.footer__inner { display: grid; grid-template-columns: auto 1fr; gap: 24px 48px; align-items: center; }
.footer__logo { height: 84px; width: auto; }
.footer__right { display: grid; gap: 14px; justify-items: end; }
.footer__links { display: flex; flex-wrap: wrap; gap: 20px; font-weight: 900; text-transform: uppercase; letter-spacing: .05em; font-size: .8rem; }
.footer__links a:hover { color: var(--sis-bolt); }
.footer__copy { font-size: .82rem; color: var(--sis-concrete); text-align: right; }
@media (max-width: 640px) {
  .footer__inner { grid-template-columns: 1fr; justify-items: start; }
  .footer__right { justify-items: start; }
  .footer__copy { text-align: left; }
}

/* ---------- FAB WhatsApp (móvil) ---------- */
.fab {
  position: fixed; right: 18px; bottom: 18px; z-index: 40;
  width: 58px; height: 58px; border-radius: 50%; background: var(--sis-bolt); color: var(--sis-black);
  display: grid; place-items: center; box-shadow: 0 10px 30px -8px rgba(7, 9, 9, .6);
  transition: transform .15s ease;
}
.fab svg { width: 30px; height: 30px; fill: currentColor; }
.fab:hover { transform: scale(1.06); }
@media (min-width: 901px) { .fab { display: none; } }

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 100; background: rgba(7, 9, 9, .9);
  display: grid; place-items: center; padding: 24px;
}
.lightbox[hidden] { display: none; }
.lightbox figure { max-width: min(900px, 100%); max-height: 100%; display: flex; flex-direction: column; gap: 12px; align-items: center; }
.lightbox img { max-height: 80vh; width: auto; max-width: 100%; background: var(--sis-white); border-radius: var(--radius-sm); padding: 8px; object-fit: contain; }
.lightbox figcaption { color: var(--sis-concrete); font-weight: 900; text-transform: uppercase; letter-spacing: .05em; font-size: .8rem; text-align: center; }
.lightbox__close {
  position: absolute; top: 16px; right: 16px; width: 48px; height: 48px; border-radius: 50%;
  border: 0; background: var(--sis-bolt); color: var(--sis-black); font-size: 2rem; line-height: 1;
}

/* ---------- Aparición suave ---------- */
@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
  .reveal.is-visible { opacity: 1; transform: none; }
}