/* Sistelec · base común de las 3 propuestas
   Tokens del Manual de marca v2 + header y menú fluido del Prompt Etapa 1.
   Cada propuesta sobreescribe lo visual en su propio <style>. */

:root {
  --verde: #0A7A3A; --lima: #7AB82A;
  --naranja: #F5A623; --naranja-hover: #E8862A;
  --petroleo: #1B7888; --noche: #243F4E;
  --texto: #1A1A1A; --fondo: #F7F8F5; --blanco: #FFFFFF;
  --whatsapp: #25D366;
  --radio: 12px; --radio-boton: 8px; --radio-hero: 24px;
  --sombra-baja: 0 1px 3px rgba(36,63,78,.08);
  --sombra-media: 0 8px 24px rgba(36,63,78,.12);
  --dur-rapida: 150ms; --dur-base: 250ms; --dur-lenta: 300ms;
  --curva-entrada: cubic-bezier(0.2, 0, 0, 1);
  --curva-salida: cubic-bezier(0.4, 0, 1, 1);
  --z-header: 100; --z-flotante: 200; --z-scrim: 290; --z-menu: 300;
  --header-h: 64px;
  --titulos: 'Saira Condensed', 'Arial Narrow', sans-serif;
  --cuerpo: 'Inter', system-ui, sans-serif;
}
@media (min-width: 1024px) { :root { --header-h: 72px; } }

*, *::before, *::after { box-sizing: border-box; }
html { scrollbar-gutter: stable; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body { margin: 0; font-family: var(--cuerpo); font-size: 16px; line-height: 1.6; color: var(--texto); background: var(--fondo); overflow-x: hidden; }
@media (min-width: 1024px) { body { font-size: 18px; } }
img, video, svg { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--titulos); margin: 0; }
p { margin: 0; }
section[id], footer[id] { scroll-margin-top: var(--header-h); }
.wrap { width: 100%; max-width: 1200px; margin-inline: auto; padding-inline: 16px; }
@media (min-width: 768px) { .wrap { padding-inline: 32px; } }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.ico { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.ico--fill { fill: currentColor; stroke: none; }

:focus-visible { outline: 3px solid var(--verde); outline-offset: 2px; border-radius: 4px; }
.oscuro :focus-visible, .hdr:not(.is-solid) :focus-visible, .fm :focus-visible { outline-color: #fff; }

.skip { position: absolute; left: 16px; top: -100px; z-index: 999; background: var(--naranja); color: var(--texto); padding: 12px 16px; border-radius: var(--radio-boton); font-weight: 600; text-decoration: none; }
.skip:focus { top: 12px; }

/* ── Botones ─────────────────────────────── */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 48px; padding: 0 22px; border-radius: var(--radio-boton); font: 600 16px/1 var(--cuerpo); text-decoration: none; cursor: pointer; border: 2px solid transparent; transition: background var(--dur-rapida), transform var(--dur-rapida), box-shadow var(--dur-rapida), border-color var(--dur-rapida), color var(--dur-rapida); white-space: nowrap; }
.btn:active { transform: scale(.98); }
.btn--pri { background: var(--naranja); color: var(--texto); }
.btn--pri:hover { background: var(--naranja-hover); transform: translateY(-2px); box-shadow: var(--sombra-media); }
.btn--sec { border-color: var(--verde); color: var(--verde); background: transparent; }
.btn--sec:hover { background: rgba(10,122,58,.08); }
.btn--sec-osc { border-color: #fff; color: #fff; background: transparent; }
.btn--sec-osc:hover { background: rgba(255,255,255,.1); }
.btn .ico { width: 20px; height: 20px; }
/* Logo de WhatsApp en verde dentro de los botones naranjas: círculo verde + glifo blanco (el verde solo, sobre naranja, no se distingue) */
.btn--pri .ico--fill, .fm-item--cta .ico--fill { width: 30px; height: 30px; padding: 5px; margin-left: -6px; border-radius: 50%; background: var(--whatsapp); color: #fff; box-shadow: 0 1px 2px rgb(26 26 26 / .2); }

/* ── Header ─────────────────────────────── */
.hdr { position: fixed; inset: 0 0 auto; z-index: var(--z-header); height: var(--header-h); transition: height 200ms var(--curva-entrada); }
.hdr::before { content: ""; position: absolute; inset: 0 0 auto; height: 120px; background: linear-gradient(180deg, rgb(36 63 78 / .7), transparent); pointer-events: none; transition: opacity 200ms; }
.hdr__bg { position: absolute; inset: 0; background: rgb(247 248 245 / .92); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); box-shadow: var(--sombra-baja); opacity: 0; transition: opacity 200ms; }
.hdr.is-solid { --header-h: 56px; }
.hdr.menu-abierto { z-index: calc(var(--z-scrim) + 5); }
.hdr.menu-abierto .hdr__wa, .hdr.menu-abierto .hdr__logo { opacity: .35; }
@media (min-width: 1024px) { .hdr.is-solid { --header-h: 64px; } }
.hdr.is-solid::before { opacity: 0; }
.hdr.is-solid .hdr__bg { opacity: 1; }
.hdr__in { position: relative; height: 100%; display: flex; align-items: center; gap: 12px; }
.hdr__logo { position: relative; display: block; width: 148px; height: 43px; margin-right: auto; flex: none; }
@media (min-width: 1024px) { .hdr__logo { width: 176px; height: 51px; } .hdr.is-solid .hdr__logo { width: 160px; height: 47px; } }
.hdr__logo img { position: absolute; inset: 0; width: 100%; height: 100%; transition: opacity 200ms, width 200ms; }
.hdr__logo .logo-c { opacity: 0; }
.hdr.is-solid .logo-c { opacity: 1; }
.hdr.is-solid .logo-o { opacity: 0; }
.hdr__nav { display: none; gap: 28px; margin-right: 8px; }
.hdr__nav a { position: relative; font: 500 16px/1 var(--cuerpo); color: #fff; text-decoration: none; padding: 10px 0; transition: color 200ms; }
.hdr__nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 2px; height: 2px; background: var(--lima); transform: scaleX(0); transform-origin: left; transition: transform var(--dur-base) var(--curva-entrada); }
.hdr__nav a:hover::after, .hdr__nav a[aria-current]::after { transform: scaleX(1); }
.hdr.is-solid .hdr__nav a { color: var(--texto); }
.hdr.is-solid .hdr__nav a::after { background: var(--verde); }
.hdr__cta { display: none; }
.hdr__wa { display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; background: var(--whatsapp); color: #fff; transition: transform var(--dur-rapida), filter var(--dur-rapida); }
.hdr__wa:hover { filter: brightness(1.08); }
.hdr__wa:active { transform: scale(.96); }
@media (min-width: 768px) { .hdr__cta { display: inline-flex; } .hdr__wa { display: none; } }
@media (min-width: 1024px) { .hdr__nav { display: flex; } .fm-btn { display: none !important; } }

/* ── Menú fluido (adaptado) ─────────────── */
.fm-btn { position: relative; z-index: calc(var(--z-menu) + 1); display: inline-grid; place-items: center; width: 48px; height: 48px; border-radius: 50%; border: 1px solid rgb(255 255 255 / .2); background: rgb(255 255 255 / .1); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); color: #fff; cursor: pointer; transition: background var(--dur-base); }
.hdr.is-solid .fm-btn, .fm-btn[aria-expanded="true"] { background: var(--noche); border-color: transparent; }
.fm-btn .ico { position: absolute; width: 22px; height: 22px; transition: transform var(--dur-base) var(--curva-entrada), opacity var(--dur-base); }
.fm-btn .i-x { opacity: 0; transform: rotate(-90deg) scale(.5); }
.fm-btn[aria-expanded="true"] .i-menu { opacity: 0; transform: rotate(90deg) scale(.5); }
.fm-btn[aria-expanded="true"] .i-x { opacity: 1; transform: none; }

.fm-scrim { position: fixed; inset: 0; z-index: var(--z-scrim); background: rgb(36 63 78 / .6); backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); opacity: 0; transition: opacity var(--dur-base); }
.fm-scrim.is-open { opacity: 1; }
.fm { position: fixed; z-index: var(--z-menu); right: 16px; top: calc((var(--header-h) - 48px) / 2); pointer-events: none; }
@media (min-width: 768px) { .fm { right: 32px; } }
.fm ul { list-style: none; margin: 0; padding: 0; position: relative; width: 0; height: 48px; }
.fm li { position: absolute; right: 0; top: 0; }
.fm-item { display: inline-flex; align-items: center; gap: 10px; height: 48px; padding: 0 20px; border-radius: 999px; background: var(--noche); border: 1px solid rgb(255 255 255 / .1); box-shadow: var(--sombra-media); color: #fff; font: 500 16px/1 var(--cuerpo); text-decoration: none; white-space: nowrap; pointer-events: auto;
  opacity: 0; transform: translateY(0) scale(.9); will-change: transform;
  transition: transform var(--dur-base) var(--curva-salida) calc((5 - var(--i)) * 30ms), opacity var(--dur-base) var(--curva-salida) calc((5 - var(--i)) * 30ms); }
.fm-item .ico { width: 20px; height: 20px; }
.fm-item[aria-current] span { box-shadow: inset 0 -2px 0 var(--lima); }
.fm-item--cta { background: var(--naranja); color: var(--texto); border-color: transparent; }
.fm .fm-item--cta .ico--fill { width: 30px; height: 30px; margin-left: -10px; }
.fm.is-open .fm-item { opacity: 1; transform: translateY(calc((var(--i) + 1) * 56px)); transition: transform var(--dur-base) var(--curva-entrada) calc(var(--i) * 40ms), opacity var(--dur-base) var(--curva-entrada) calc(var(--i) * 40ms); }
.fm:not(.is-open) .fm-item { pointer-events: none; }
@media (prefers-reduced-motion: reduce) {
  .fm-item { transform: translateY(calc((var(--i) + 1) * 56px)) !important; transition: opacity 150ms !important; }
}

/* ── Video del hero ─────────────────────── */
/* Video "multiservicios": la cámara está centrada en el cuadro.
   Móvil: el video ocupa la parte de arriba y se funde hacia el texto.
   Escritorio: ocupa la zona derecha y se funde hacia la columna de texto. */
.hero { background: var(--noche); }
.hero-media { position: absolute; inset: 0 0 auto 0; height: 58%; overflow: hidden;
  -webkit-mask-image: linear-gradient(180deg, #000 55%, transparent 100%); mask-image: linear-gradient(180deg, #000 55%, transparent 100%); }
.hero-media img, .hero-media video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 40%; }
@media (min-aspect-ratio: 1/1) {
  .hero-media { inset: 0 0 0 auto; width: 66%; height: 100%;
    -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 32%); mask-image: linear-gradient(90deg, transparent 0%, #000 32%); }
  .hero-media img, .hero-media video { object-position: center center; }
}
.hero-media video { opacity: 0; transition: opacity var(--dur-base); }
.hero-media video.is-playing { opacity: 1; }
.vid-toggle { position: absolute; z-index: 3; right: 16px; bottom: 16px; width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; color: #fff; cursor: pointer; background: rgb(255 255 255 / .1); border: 1px solid rgb(255 255 255 / .2); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
.vid-toggle[hidden] { display: none; }
.vid-toggle .i-play { display: none; }
.vid-toggle[data-paused="true"] .i-play { display: block; }
.vid-toggle[data-paused="true"] .i-pause { display: none; }

/* ── Entrada y revelado ─────────────────── */
@keyframes sube { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }
@keyframes funde { from { opacity: 0; } to { opacity: 1; } }
.entra > * { animation: sube var(--dur-lenta) var(--curva-entrada) both; }
.entra > *:nth-child(2) { animation-delay: 80ms; } .entra > *:nth-child(3) { animation-delay: 160ms; }
.entra > *:nth-child(4) { animation-delay: 240ms; } .entra > *:nth-child(5) { animation-delay: 320ms; }
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 500ms var(--curva-entrada), transform 500ms var(--curva-entrada); }
.reveal.is-in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .entra > * { animation: funde 150ms both !important; }
  .reveal { transform: none; transition: opacity 150ms; }
}

/* ── Nodo lima del isotipo ──────────────── */
.nodo { display: inline-block; width: 8px; height: 8px; border-radius: 50%; border: 2px solid var(--lima); flex: none; }

/* ── Etiqueta de foto ───────────────────── */
.tag-foto { position: absolute; left: 10px; bottom: 10px; z-index: 2; font: 700 12px/1 var(--titulos); letter-spacing: .1em; text-transform: uppercase; padding: 6px 8px; border-radius: 6px; background: rgb(36 63 78 / .85); color: #fff; }

/* ── Aviso de maqueta ───────────────────── */
.maqueta { border: 2px dashed currentColor; opacity: .55; border-radius: var(--radio); padding: 24px; text-align: center; font-size: 14px; }

/* ── WhatsApp flotante (solo móvil) ─────── */
.wa-float { position: fixed; right: 16px; bottom: 16px; z-index: var(--z-flotante); width: 56px; height: 56px; border-radius: 50%; background: var(--whatsapp); color: #fff; display: grid; place-items: center; box-shadow: var(--sombra-media); transform: scale(0); transition: transform var(--dur-base) var(--curva-entrada); }
.wa-float.is-on { transform: scale(1); }
.wa-float .ico { width: 28px; height: 28px; }
@media (min-width: 1024px) { .wa-float { display: none; } }