/* =====================================================================
   Silver Prime Eventos — hoja de estilo del sitio público
   Paleta: plata y negro como base, azul #0000FF como acento.
   ===================================================================== */

:root {
  --negro:        #0b0b0d;
  --carbon:       #16161a;
  --grafito:      #2a2a30;
  --gris:         #808080;
  --gris-texto:   #5c5c64;
  --plata:        #c9c9cf;
  --plata-claro:  #e4e4e8;
  --humo:         #f5f5f7;
  --blanco:       #ffffff;

  --azul:         #0000ff;
  --azul-hover:   #0000c8;
  --azul-suave:   rgba(0, 0, 255, .08);

  --serif:  "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --sans:   "Jost", "Segoe UI", system-ui, -apple-system, Arial, sans-serif;

  --wrap:   1180px;
  --radio:  2px;
  --sombra: 0 18px 48px rgba(11, 11, 13, .10);
  --trans:  .28s cubic-bezier(.2, .7, .3, 1);
}

/* ---------------------------------------------------------------- base */

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--sans);
  font-weight: 300;
  font-size: 17px;
  line-height: 1.72;
  color: var(--negro);
  background: var(--blanco);
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--azul); text-decoration: none; }
a:hover { color: var(--azul-hover); }

h1, h2, h3 { font-family: var(--serif); font-weight: 400; line-height: 1.14; margin: 0 0 .5em; }

p { margin: 0 0 1.15em; }

:focus-visible { outline: 2px solid var(--azul); outline-offset: 3px; }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 999;
  background: var(--azul); color: #fff; padding: 12px 20px;
}
.skip:focus { left: 12px; top: 12px; color: #fff; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 720px; }

.eyebrow {
  font-size: 12px; letter-spacing: .28em; text-transform: uppercase;
  color: var(--gris); font-weight: 500; margin: 0 0 18px;
}
.eyebrow--light { color: var(--plata); }

.muted { color: var(--gris-texto); font-size: 15px; }
.empty { color: var(--gris-texto); font-style: italic; }

.link {
  position: relative; font-size: 15px; letter-spacing: .12em;
  text-transform: uppercase; font-weight: 500;
  border-bottom: 1px solid var(--azul); padding-bottom: 3px;
}
.link:hover { border-color: var(--azul-hover); }

/* -------------------------------------------------------------- botones */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font-family: var(--sans); font-size: 13px; font-weight: 500;
  letter-spacing: .18em; text-transform: uppercase;
  padding: 16px 34px; border: 1px solid var(--azul); border-radius: var(--radio);
  background: var(--azul); color: #fff; cursor: pointer;
  transition: background var(--trans), color var(--trans), border-color var(--trans), transform var(--trans);
}
.btn:hover { background: var(--azul-hover); border-color: var(--azul-hover); color: #fff; transform: translateY(-1px); }
.btn--sm { padding: 11px 22px; font-size: 12px; }
.btn--block { width: 100%; }
.btn--ghost { background: transparent; color: var(--negro); border-color: var(--plata); }
.btn--ghost:hover { background: transparent; color: var(--azul); border-color: var(--azul); }
.btn--light { background: transparent; color: #fff; border-color: rgba(255,255,255,.45); }
.btn--light:hover { background: #fff; color: var(--negro); border-color: #fff; }

/* Sobre fondos oscuros el botón secundario debe verse claro */
.hero .btn--ghost,
.cta .btn--ghost,
.section--dark .btn--ghost {
  color: #fff; border-color: rgba(255, 255, 255, .45); background: transparent;
}
.hero .btn--ghost:hover,
.cta .btn--ghost:hover,
.section--dark .btn--ghost:hover { background: #fff; color: var(--negro); border-color: #fff; }

/* -------------------------------------------------------------- topbar */

.topbar {
  position: sticky; top: 0; z-index: 90;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--plata-claro);
  transition: box-shadow var(--trans);
}
.topbar.is-stuck { box-shadow: 0 10px 30px rgba(11,11,13,.07); }
.topbar__in { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 82px; }

.brand { display: flex; align-items: center; gap: 14px; color: var(--negro); }
.brand:hover { color: var(--negro); }
.brand__mark {
  display: grid; place-items: center; width: 44px; height: 44px;
  border: 1px solid var(--plata); border-radius: 50%;
  font-family: var(--serif); font-size: 18px; letter-spacing: .04em;
  background: linear-gradient(145deg, #f2f2f4, #cfcfd6 45%, #ffffff 60%, #b9b9c1);
  color: var(--carbon); flex: 0 0 auto;
}
.brand__text { display: flex; flex-direction: column; line-height: 1.2; }
.brand__name { font-family: var(--serif); font-size: 20px; letter-spacing: .06em; }
.brand__tag { font-size: 10px; letter-spacing: .22em; text-transform: uppercase; color: var(--gris); }

.nav ul { display: flex; align-items: center; gap: 30px; list-style: none; margin: 0; padding: 0; }
.nav a {
  font-size: 13px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--negro); font-weight: 400; padding: 6px 0; position: relative;
}
.nav a:not(.btn)::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 1px; width: 0;
  background: var(--azul); transition: width var(--trans);
}
.nav a:not(.btn):hover::after,
.nav a[aria-current="page"]::after { width: 100%; }
.nav a[aria-current="page"]:not(.btn) { color: var(--azul); }
/* el botón del menú conserva su propio relleno */
.nav a.btn { padding: 11px 22px; color: #fff; }
.nav a.btn:hover { color: #fff; }

.navtoggle {
  display: none; width: 44px; height: 44px; border: 1px solid var(--plata-claro);
  background: transparent; border-radius: var(--radio); cursor: pointer;
  padding: 12px 11px; flex-direction: column; justify-content: space-between;
}
.navtoggle span { display: block; height: 1px; background: var(--negro); transition: transform var(--trans), opacity var(--trans); }
.navtoggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.navtoggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.navtoggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

/* ---------------------------------------------------------------- hero */

.hero { position: relative; background: var(--negro); color: #fff; overflow: hidden; }
/* El logo de fondo se amplía y desenfoca: aporta la textura de raso
   sin que se lea dos veces el nombre de la marca. */
.hero__bg { position: absolute; inset: 0; overflow: hidden; }
.hero__bg img {
  width: 100%; height: 100%; object-fit: cover;
  opacity: .42; filter: grayscale(1) blur(14px) contrast(1.1);
  transform: scale(1.7);
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(11,11,13,.58) 0%, rgba(11,11,13,.80) 55%, rgba(11,11,13,.94) 100%);
}
.hero__in { position: relative; z-index: 2; padding: 130px 24px 110px; max-width: 900px; text-align: center; }
.hero__title { font-size: clamp(2.6rem, 6vw, 4.6rem); letter-spacing: .01em; margin-bottom: 22px; }
.hero__text { font-size: clamp(1rem, 1.6vw, 1.18rem); color: var(--plata); max-width: 640px; margin: 0 auto 34px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.hero__actions--center { justify-content: center; }
.hero__slogan {
  margin: 46px 0 0; font-family: var(--serif); font-style: italic;
  font-size: 19px; color: var(--plata);
}
.hero__slogan::before, .hero__slogan::after { content: "—"; color: var(--gris); margin: 0 10px; }

/* --------------------------------------------------------------- strip */

.strip { background: var(--negro); border-top: 1px solid rgba(255,255,255,.08); color: #fff; }
.strip__grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: rgba(255,255,255,.08);
}
.strip__grid > div {
  background: var(--negro); padding: 30px 26px; display: flex; flex-direction: column; gap: 4px;
}
.strip__grid strong { font-size: 14px; letter-spacing: .12em; text-transform: uppercase; font-weight: 500; }
.strip__grid span { font-size: 14px; color: var(--plata); line-height: 1.5; }

/* ------------------------------------------------------------- section */

.section { padding: 96px 0; }
.section--soft { background: var(--humo); }
.section--dark { background: var(--negro); color: #fff; }
.section--dark p { color: var(--plata); }
.section--dark .section__title { color: #fff; }
.section--center { text-align: center; padding: 120px 0; }

.section__head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.section__head--left { margin-left: 0; text-align: left; margin-bottom: 40px; }
.section__title { font-size: clamp(1.9rem, 3.4vw, 2.8rem); }
.section__lead { color: var(--gris-texto); }
.section__foot { margin-top: 48px; text-align: center; }

.pagehead {
  padding: 96px 0 60px; border-bottom: 1px solid var(--plata-claro);
  background: linear-gradient(180deg, var(--humo), var(--blanco));
}
.pagehead__title { font-size: clamp(2.2rem, 4.6vw, 3.4rem); margin-bottom: 16px; }
.pagehead__lead { color: var(--gris-texto); max-width: 640px; font-size: 1.05rem; }
.pagehead--service .pagehead__lead { max-width: 760px; }

/* --------------------------------------------------------------- grids */

.grid { display: grid; gap: 26px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--5 { grid-template-columns: repeat(5, 1fr); }

/* --------------------------------------------------------------- cards */

.card { background: #fff; border: 1px solid var(--plata-claro); border-radius: var(--radio); overflow: hidden; transition: box-shadow var(--trans), transform var(--trans), border-color var(--trans); }
.card:hover { box-shadow: var(--sombra); transform: translateY(-4px); border-color: var(--plata); }
.card__link { display: block; color: inherit; height: 100%; }
.card__link:hover { color: inherit; }
.card__media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: var(--humo); }
.card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.card:hover .card__media img { transform: scale(1.04); }
.card__media--empty {
  display: grid; place-items: center;
  background: linear-gradient(140deg, #f4f4f6 0%, #d8d8de 45%, #ffffff 58%, #c6c6ce 100%);
}
.card__icon { color: var(--carbon); opacity: .75; }
.card__icon .icon { width: 54px; height: 54px; }
.card__body { padding: 24px 24px 28px; }
.card__title { font-size: 1.32rem; margin-bottom: 10px; }
.card__text { font-size: 15px; color: var(--gris-texto); margin-bottom: 16px; }
.card__more {
  font-size: 12px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--azul); border-bottom: 1px solid transparent; padding-bottom: 2px;
}
.card:hover .card__more { border-color: var(--azul); }

.icon { width: 24px; height: 24px; }
.icon--lg { width: 42px; height: 42px; }

/* --------------------------------------------------------------- split */

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split--reverse .split__text { order: 2; }
.split--detail { grid-template-columns: 1.7fr 1fr; align-items: start; gap: 64px; }
.split--form { grid-template-columns: 1.4fr 1fr; align-items: start; gap: 56px; }

.split__list { list-style: none; margin: 0; padding: 0; border-top: 1px solid rgba(255,255,255,.14); }
.split__list li { border-bottom: 1px solid rgba(255,255,255,.14); }
.split__list a, .split__list li > strong { display: block; padding: 22px 0; color: #fff; }
.split__list a:hover { color: #fff; }
.split__list strong { display: block; font-size: 1.15rem; font-family: var(--serif); font-weight: 400; letter-spacing: .02em; }
.split__list span { display: block; font-size: 14px; color: var(--plata); margin-top: 4px; }
.split__list li:hover strong { color: var(--plata); }
.split__list--plain li { padding: 22px 0; }

.split__panel { background: var(--humo); border: 1px solid var(--plata-claro); padding: 40px; }

.ticks { list-style: none; margin: 0; padding: 0; }
.ticks li { position: relative; padding: 12px 0 12px 34px; border-bottom: 1px solid var(--plata-claro); font-size: 15px; }
.ticks li:last-child { border-bottom: 0; }
.ticks li::before {
  content: ""; position: absolute; left: 4px; top: 21px; width: 14px; height: 7px;
  border-left: 1.5px solid var(--azul); border-bottom: 1.5px solid var(--azul);
  transform: rotate(-45deg);
}

/* -------------------------------------------------------------- panels */

.panel { background: #fff; border: 1px solid var(--plata-claro); padding: 42px; }
.panel--accent { border-top: 3px solid var(--azul); }
.panel__title { font-size: 1.7rem; margin-bottom: 14px; }
.panel p { color: var(--gris-texto); margin-bottom: 0; }

.prose { max-width: 760px; }
.prose p { color: var(--gris-texto); font-size: 1.03rem; }
.prose__img { margin-bottom: 28px; border: 1px solid var(--plata-claro); }

.aside { background: var(--humo); border: 1px solid var(--plata-claro); padding: 34px; position: sticky; top: 108px; }
.aside__icon { display: block; color: var(--azul); margin-bottom: 14px; }
.aside__title { font-size: 1.45rem; margin-bottom: 12px; }
.aside p { font-size: 15px; color: var(--gris-texto); }
.aside .btn { margin-top: 10px; }
.aside--contact { position: static; }
.aside__social { display: flex; gap: 18px; margin-top: 22px; font-size: 13px; letter-spacing: .12em; text-transform: uppercase; }

.contactlist { list-style: none; margin: 0 0 26px; padding: 0; }
.contactlist li { padding: 14px 0; border-bottom: 1px solid var(--plata-claro); font-size: 15px; }
.contactlist span { display: block; font-size: 11px; letter-spacing: .2em; text-transform: uppercase; color: var(--gris); margin-bottom: 3px; }

/* -------------------------------------------------------------- values */

.values .value { border-top: 1px solid var(--plata); padding-top: 22px; }
.value__num { font-family: var(--serif); font-size: 13px; letter-spacing: .2em; color: var(--azul); }
.value h3 { font-size: 1.25rem; margin: 10px 0 8px; }
.value p { font-size: 14px; color: var(--gris-texto); margin: 0; }

/* --------------------------------------------------------------- chips */

.chips { display: flex; flex-wrap: wrap; gap: 10px; padding-top: 34px; }
.chips--filter { padding-top: 0; margin-bottom: 34px; }
.chip {
  font-family: var(--sans); font-size: 12px; letter-spacing: .14em; text-transform: uppercase;
  padding: 10px 18px; border: 1px solid var(--plata); background: transparent;
  color: var(--negro); cursor: pointer; border-radius: 999px; transition: all var(--trans);
}
.chip:hover { border-color: var(--azul); color: var(--azul); }
.chip.is-on { background: var(--negro); border-color: var(--negro); color: #fff; }

/* ------------------------------------------------------------- galería */

.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.gallery--preview { grid-template-columns: repeat(3, 1fr); }
.gallery__item { margin: 0; position: relative; overflow: hidden; background: var(--humo); border: 1px solid var(--plata-claro); }
.gallery__item img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; transition: transform .6s ease; }
.gallery__item:hover img { transform: scale(1.05); }
.gallery__item figcaption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 26px 18px 14px; font-size: 13px; color: #fff;
  background: linear-gradient(180deg, transparent, rgba(11,11,13,.82));
}
.gallery__item[hidden] { display: none; }

/* ----------------------------------------------------------------- cta */

.cta { background: var(--negro); color: #fff; padding: 92px 0; text-align: center; }
.cta__in { max-width: 680px; margin: 0 auto; }
.cta h2 { font-size: clamp(1.9rem, 3.6vw, 2.7rem); color: #fff; }
.cta p { color: var(--plata); margin-bottom: 30px; }

/* -------------------------------------------------------------- formul. */

.form { background: #fff; }
.field { margin-bottom: 22px; }
.field--half { max-width: 50%; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field label {
  display: block; font-size: 12px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--gris-texto); margin-bottom: 8px;
}
.req { color: var(--azul); }
.field input, .field select, .field textarea {
  width: 100%; font-family: var(--sans); font-size: 16px; font-weight: 300;
  color: var(--negro); background: var(--blanco);
  border: 1px solid var(--plata); border-radius: var(--radio);
  padding: 14px 16px; transition: border-color var(--trans), box-shadow var(--trans);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--azul); box-shadow: 0 0 0 3px var(--azul-suave);
}
.field textarea { resize: vertical; min-height: 130px; }
.field__error { display: block; margin-top: 6px; font-size: 13px; color: #b00020; }
.form__note { margin-top: 16px; font-size: 13px; color: var(--gris); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.alert { padding: 14px 18px; border-left: 3px solid var(--azul); background: var(--humo); font-size: 15px; margin: 22px 0; }
.alert--error { border-color: #b00020; background: #fdf3f4; color: #7c0016; }
.alert--ok { border-color: #0a7d34; background: #f1f9f3; color: #0a5c28; }

/* -------------------------------------------------------------- footer */

.footer { background: var(--carbon); color: var(--plata); padding: 72px 0 0; font-size: 15px; }
.footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1.2fr 1fr; gap: 42px; padding-bottom: 52px; }
.footer .brand__name, .footer .brand__mark { color: #fff; }
.footer .brand__mark { background: linear-gradient(145deg, #4a4a52, #2a2a30 45%, #6d6d76 60%, #2a2a30); border-color: #55555e; color: #fff; }
.footer__about { margin-top: 18px; color: var(--gris); max-width: 320px; }
.footer__title { font-family: var(--sans); font-size: 11px; letter-spacing: .22em; text-transform: uppercase; color: #fff; margin-bottom: 16px; }
.footer__list { list-style: none; margin: 0; padding: 0; }
.footer__list li { margin-bottom: 9px; line-height: 1.5; }
.footer__list a { color: var(--plata); }
.footer__list a:hover { color: #fff; }
.footer__bottom {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  border-top: 1px solid rgba(255,255,255,.1); padding-top: 22px; padding-bottom: 26px;
  font-size: 13px; color: var(--gris);
}
.footer__bottom p { margin: 0; }
.footer__bottom a { color: var(--gris); }
.footer__bottom a:hover { color: var(--plata); }

/* ------------------------------------------------------------ whatsapp */

.wa {
  position: fixed; right: 22px; bottom: 22px; z-index: 80;
  width: 56px; height: 56px; border-radius: 50%;
  display: grid; place-items: center;
  background: #25d366; color: #fff;
  box-shadow: 0 10px 26px rgba(11,11,13,.26);
  transition: transform var(--trans);
}
.wa:hover { transform: translateY(-3px) scale(1.04); color: #fff; }
.wa svg { width: 30px; height: 30px; }

/* ----------------------------------------------------------- responsive */

@media (max-width: 1020px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--5 { grid-template-columns: repeat(3, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .split--detail, .split--form { grid-template-columns: 1fr; gap: 40px; }
  .aside { position: static; }
}

@media (max-width: 860px) {
  body { font-size: 16px; }
  .navtoggle { display: flex; }
  .nav {
    position: absolute; left: 0; right: 0; top: 100%;
    background: #fff; border-bottom: 1px solid var(--plata-claro);
    max-height: 0; overflow: hidden; transition: max-height var(--trans);
  }
  .nav.is-open { max-height: 520px; }
  .nav ul { flex-direction: column; align-items: stretch; gap: 0; padding: 10px 24px 26px; }
  .nav li { border-bottom: 1px solid var(--humo); }
  .nav li:last-child { border: 0; padding-top: 16px; }
  .nav a { display: block; padding: 15px 0; }
  .nav .btn { justify-content: center; }

  .section { padding: 68px 0; }
  .hero__in { padding: 92px 24px 78px; }
  .strip__grid { grid-template-columns: repeat(2, 1fr); }
  .split, .split--reverse { grid-template-columns: 1fr; gap: 34px; }
  .split--reverse .split__text { order: 0; }
  .gallery, .gallery--preview { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .field--half { max-width: 100%; }
}

@media (max-width: 560px) {
  .grid--3, .grid--4, .grid--5 { grid-template-columns: 1fr; }
  .gallery, .gallery--preview { grid-template-columns: 1fr; }
  .field-row { grid-template-columns: 1fr; gap: 0; }
  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .strip__grid { grid-template-columns: 1fr; }
  .panel, .split__panel, .aside { padding: 26px; }
  .brand__tag { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

/* -------------------------------------------------------------- impresión */

@media print {
  .topbar, .wa, .cta, .footer__bottom a { display: none; }
  body { color: #000; font-size: 12pt; }
}