/* ==========================================================================
   Grupo SRC Solutions — Sistema de diseño
   Motivo: el disco. Acento azul señal < 5 % de la superficie.
   ========================================================================== */

/* ------------------------------------------------------------------ Fuentes */
@font-face {
  font-family: 'Archivo';
  font-style: normal;
  font-weight: 100 900;
  font-stretch: 62% 125%;
  src: url('fonts/archivo-var-latin.woff2') format('woff2');
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 400;
  src: url('fonts/ibmplexsans-400-latin.woff2') format('woff2');
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 500;
  src: url('fonts/ibmplexmono-500-latin.woff2') format('woff2');
  font-display: swap;
}

/* ------------------------------------------------------------------- Tokens */
:root {
  /* Color */
  --tinta:   #0C0C0D;
  --blanco:  #FFFFFF;
  --niebla:  #F4F4F2;
  --grafito: #6A6E75;
  --linea:   #DEDEDA;
  --senal:   #2B44FF;
  --linea-oscura: #242427; /* hairline sobre fondos oscuros */

  /* Escala de espaciado (8·12·16·24·32·48·64·96) */
  --e1: 8px;  --e2: 12px; --e3: 16px; --e4: 24px;
  --e5: 32px; --e6: 48px; --e7: 64px; --e8: 96px;

  /* Layout */
  --max: 1200px;
  --margen: clamp(24px, 5vw, 48px);
  --pad-seccion: clamp(56px, 8vw, 104px);

  /* Tipografía */
  --display: 'Archivo', system-ui, sans-serif;
  --texto: 'IBM Plex Sans', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;

  --t-transicion: 220ms ease;
}

/* --------------------------------------------------------------- Reset base */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--texto);
  font-size: 17px;
  line-height: 1.58;
  color: var(--tinta);
  background: var(--blanco);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* Foco visible AA */
:focus-visible {
  outline: 2px solid var(--senal);
  outline-offset: 3px;
  border-radius: 2px;
}

/* Salto de accesibilidad */
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--tinta); color: var(--blanco);
  padding: var(--e2) var(--e4); font-family: var(--mono); font-size: 13px;
}
.skip-link:focus { left: var(--e3); top: var(--e3); }

/* ----------------------------------------------------------- Tipografía web */
h1, h2, h3 {
  font-family: var(--display);
  font-variation-settings: 'wght' 600, 'wdth' 112;
  font-weight: 600;
  letter-spacing: -0.022em;
  line-height: 1.05;
  color: var(--tinta);
}

.display-hero { font-size: clamp(40px, 6vw, 72px); }
h2 { font-size: clamp(28px, 4vw, 44px); line-height: 1.08; }
h3 { font-size: clamp(20px, 2.2vw, 24px); line-height: 1.15; }

p { max-width: 68ch; }

/* Micro-etiqueta: eco del "S O L U T I O N S" del logo */
.eyebrow {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.19em;
  text-transform: uppercase;
  color: var(--senal);
  display: inline-block;
}

/* ---------------------------------------------------------------- Utilidades */
.container { width: 100%; max-width: var(--max); margin-inline: auto; padding-inline: var(--margen); }
.section { padding-block: var(--pad-seccion); }
.section-alt { background: var(--niebla); }
.section-dark { background: var(--tinta); color: var(--niebla); }
.section-dark h1, .section-dark h2, .section-dark h3 { color: var(--blanco); }
.section-dark p { color: #B9BBBF; }

.section-head { max-width: 42ch; margin-bottom: var(--e6); }
.section-head .eyebrow { margin-bottom: var(--e4); }
.lead { color: var(--grafito); font-size: clamp(17px, 2vw, 20px); margin-top: var(--e4); }
.section-dark .lead { color: #B9BBBF; }

/* ------------------------------------------------------------------ Botones */
.btn {
  display: inline-flex; align-items: center; gap: var(--e2);
  font-family: var(--mono); font-size: 13px; font-weight: 500;
  letter-spacing: 0.04em;
  padding: 14px var(--e4);
  border: 1px solid transparent;
  transition: background var(--t-transicion), color var(--t-transicion), border-color var(--t-transicion);
  cursor: pointer;
}
.btn-primary { background: var(--senal); color: var(--blanco); }
.btn-primary:hover { background: #1B33E6; }
.btn-ghost { background: transparent; color: currentColor; border-color: currentColor; }
.btn-ghost:hover { background: rgba(255,255,255,0.08); }
.section:not(.section-dark) .btn-ghost:hover { background: var(--niebla); }
.btn svg { width: 18px; height: 18px; }

/* ============================================================ Header / Nav */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--t-transicion), border-color var(--t-transicion);
}
/* Aparece al salir del hero (secciones claras) */
.site-header.scrolled {
  background: rgba(12,12,13,0.82);
  backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  border-bottom-color: var(--linea-oscura);
}
.site-header .container {
  display: flex; align-items: center; gap: var(--e4);
  min-height: 64px;
}
.brand { display: inline-flex; align-items: center; gap: var(--e2); margin-right: auto; }
.header-cta { padding: 9px var(--e3); font-size: 12px; }
.brand img { width: 32px; height: 32px; border-radius: 50%; }
.brand-name { font-family: var(--display); font-variation-settings: 'wght' 600, 'wdth' 112; font-size: 16px; letter-spacing: -0.01em; color: var(--niebla); }

.nav-list { display: flex; gap: var(--e5); align-items: center; }
.nav-list a { font-size: 15px; color: #B9BBBF; transition: color var(--t-transicion); }
.nav-list a:hover { color: var(--blanco); }

.nav-toggle {
  display: none; background: none; border: 0; cursor: pointer;
  width: 44px; height: 44px; align-items: center; justify-content: center;
}
.nav-toggle svg { width: 24px; height: 24px; stroke: var(--niebla); }

@media (max-width: 820px) {
  .nav-toggle { display: inline-flex; }
  .nav-list {
    position: fixed; inset: 64px 0 auto 0;
    flex-direction: column; gap: 0; align-items: stretch;
    background: rgba(12,12,13,0.96);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--linea-oscura);
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: opacity var(--t-transicion), transform var(--t-transicion);
  }
  .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-list a { padding: var(--e4) var(--margen); border-top: 1px solid var(--linea-oscura); }
}

/* ================================================================== Hero */
.hero {
  position: relative; overflow: hidden;
  background: var(--tinta); color: var(--niebla);
  padding-block: clamp(72px, 12vw, 128px);
  min-height: min(88vh, 760px);
  display: flex; align-items: center;
}
.hero .container { position: relative; z-index: 2; width: 100%; }
.hero .display-hero { color: var(--blanco); max-width: 15ch; }
.hero p { color: #B9BBBF; font-size: clamp(17px, 2vw, 20px); margin-top: var(--e5); max-width: 52ch; }
.hero .eyebrow { margin-bottom: var(--e4); }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--e3); margin-top: var(--e6); }

/* Fila de metadatos: llena el pie del hero con capacidades reales */
.hero-meta {
  display: flex; flex-wrap: wrap; gap: var(--e3) var(--e5);
  margin-top: var(--e7); padding-top: var(--e4);
  border-top: 1px solid var(--linea-oscura);
}
.hero-meta span {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.14em;
  text-transform: uppercase; color: #8A8D93;
  display: inline-flex; align-items: center; gap: var(--e2);
}
.hero-meta span::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--linea-oscura); }
.hero-meta span:first-child::before { background: var(--senal); }

/* Motivo del disco: aros hairline estáticos + pulsos "sonar" hacia el borde derecho */
.hero-rings, .hero-pulse {
  position: absolute; top: 50%; right: clamp(-360px, -14vw, -160px); z-index: 1;
  width: clamp(560px, 62vw, 880px); aspect-ratio: 1;
  transform: translateY(-50%); pointer-events: none;
  -webkit-mask-image: radial-gradient(circle at center, #000 52%, transparent 74%);
          mask-image: radial-gradient(circle at center, #000 52%, transparent 74%);
}
.hero-rings {
  border-radius: 50%;
  background: repeating-radial-gradient(circle at center,
    transparent 0 71px, var(--linea-oscura) 71px 72px);
}
.hero-pulse span {
  position: absolute; inset: 0; margin: auto; width: 100%; height: 100%;
  border-radius: 50%; border: 1px solid rgba(255,255,255,0.16);
  opacity: 0; animation: sonar 8s ease-out infinite;
}
.hero-pulse span:nth-child(2) { animation-delay: 2.6s; }
.hero-pulse span:nth-child(3) { animation-delay: 5.2s; }
@keyframes sonar {
  0%   { transform: scale(0.16); opacity: 0; }
  12%  { opacity: 0.55; }
  100% { transform: scale(1); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .hero-pulse span { animation: none; opacity: 0.18; }
  .hero-pulse span:nth-child(1) { transform: scale(0.5); }
  .hero-pulse span:nth-child(3) { display: none; }
}

/* ===================================================== Problemas (01–06) */
.grid-problemas {
  display: grid; grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--linea);
}
.problema {
  padding: var(--e6) var(--e5);
  border-bottom: 1px solid var(--linea);
  border-right: 1px solid var(--linea);
}
.problema:nth-child(3n) { border-right: 0; padding-right: 0; }
.problema:nth-child(3n+1) { padding-left: 0; }
.problema .num {
  font-family: var(--mono); font-weight: 500; font-size: 13px;
  color: var(--senal); letter-spacing: 0.1em; display: block; margin-bottom: var(--e3);
}
.problema h3 { font-size: 20px; margin-bottom: var(--e2); }
.problema p { color: var(--grafito); font-size: 15px; }

/* ============================================================= Servicios */
.grid-servicios { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--linea); border: 1px solid var(--linea); }
.servicio { background: var(--blanco); padding: var(--e5); }
.section-alt .grid-servicios { background: var(--linea); }
.section-alt .servicio { background: var(--niebla); }
.servicio .icono svg { width: 24px; height: 24px; stroke: var(--tinta); margin-bottom: var(--e4); }
.servicio h3 { font-size: 19px; margin-bottom: var(--e2); }
.servicio p { color: var(--grafito); font-size: 15px; }

/* ========================================================= Cómo trabajamos */
.momentos { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--e6); }
.momento > .eyebrow { color: var(--grafito); margin-bottom: var(--e4); display: block; }
.paso { display: flex; align-items: center; gap: var(--e3); padding-block: var(--e3); border-top: 1px solid var(--linea); }
.paso:last-child { border-bottom: 1px solid var(--linea); }
.disco {
  flex: 0 0 auto; width: 44px; height: 44px; border-radius: 50%;
  background: var(--tinta); color: var(--blanco);
  display: grid; place-items: center;
  font-family: var(--mono); font-size: 14px; font-weight: 500;
}
.disco.senal { background: var(--senal); }
.paso .paso-nombre { font-size: 16px; }
.proceso-nota { margin-top: var(--e7); color: var(--grafito); max-width: 60ch; }
.proceso-nota strong { color: var(--tinta); font-weight: 400; }

/* ============================================================ Tecnologías */
.tech-capa { display: grid; grid-template-columns: 200px 1fr; gap: var(--e4); padding-block: var(--e4); border-top: 1px solid var(--linea); align-items: start; }
.tech-capa:last-child { border-bottom: 1px solid var(--linea); }
.tech-capa .capa-nombre { font-family: var(--mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--grafito); padding-top: 6px; }
.chips { display: flex; flex-wrap: wrap; gap: var(--e2); }
.chip {
  font-family: var(--mono); font-size: 13px; color: var(--tinta);
  border: 1px solid var(--linea); border-radius: 100px;
  padding: 6px var(--e3);
}

/* ========================================================= Desarrollos propios */
.grid-obras { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--e5); }
.obra { border: 1px solid var(--linea); background: var(--blanco); display: flex; flex-direction: column; overflow: hidden; }
.section-alt .obra { background: var(--niebla); }
/* Video de demostración del sistema */
.obra-media {
  position: relative; aspect-ratio: 16 / 10; background: var(--tinta);
  border-bottom: 1px solid var(--linea); overflow: hidden;
}
.obra-video { width: 100%; height: 100%; object-fit: contain; display: block; background: var(--tinta); }
.obra-cuerpo { padding: var(--e4); display: flex; flex-direction: column; gap: var(--e3); flex: 1; }
.obra h3 { font-size: 19px; }
.obra p { font-size: 15px; color: var(--grafito); }
.obra .meta { font-family: var(--mono); font-size: 12px; color: var(--tinta); letter-spacing: 0.02em; margin-top: auto; }

/* ======================================================= Calidad y seguridad */
.dos-bloques { display: grid; grid-template-columns: 1fr 1fr; gap: var(--e7); }
.bloque h3 { font-size: 22px; margin-bottom: var(--e4); }
.lista-check { display: grid; gap: var(--e2); }
.lista-check li { display: flex; gap: var(--e3); align-items: flex-start; font-size: 15px; color: var(--grafito); }
.lista-check svg { flex: 0 0 auto; width: 18px; height: 18px; stroke: var(--senal); margin-top: 3px; }
.destacada {
  margin-top: var(--e5); padding: var(--e4); border-left: 2px solid var(--senal);
  background: var(--niebla); font-size: 16px; color: var(--tinta);
}
.section-alt .destacada { background: var(--blanco); }

/* ============================================================ Por qué elegirnos */
.razones { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--e5); border-top: 1px solid var(--linea-oscura); padding-top: var(--e6); }
.razon .num { font-family: var(--mono); font-size: 13px; color: var(--senal); display: block; margin-bottom: var(--e3); }
.razon h3 { font-size: 18px; color: var(--blanco); }
.honestidad {
  margin-top: var(--e7); padding: var(--e6);
  border: 1px solid var(--linea-oscura);
  font-size: clamp(17px, 2vw, 20px); line-height: 1.55; color: #D4D5D8; max-width: 72ch;
}

/* ================================================================= Contacto */
.contacto-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: var(--e7); align-items: start; }
.contacto-datos { display: grid; gap: var(--e5); }
.dato { display: flex; gap: var(--e3); align-items: flex-start; }
.dato svg { flex: 0 0 auto; width: 22px; height: 22px; stroke: var(--tinta); margin-top: 2px; }
.dato h3 { font-size: 15px; font-family: var(--mono); font-variation-settings: normal; font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 4px; }
.dato p { font-size: 15px; color: var(--grafito); }

.form-nota { font-size: 14px; color: var(--grafito); margin-top: var(--e4); max-width: none; }

/* Qué pasa cuando nos escribe */
.pasos-contacto { margin-top: var(--e6); padding-top: var(--e5); border-top: 1px solid var(--linea); }
.pasos-contacto h3 { font-family: var(--mono); font-variation-settings: normal; font-weight: 500; font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--grafito); margin-bottom: var(--e4); }
.pasos-contacto ol { display: grid; gap: var(--e3); }
.pasos-contacto li { display: flex; gap: var(--e3); align-items: baseline; font-size: 15px; color: var(--tinta); }
.pasos-contacto .num { font-family: var(--mono); font-size: 13px; color: var(--senal); flex: 0 0 auto; }

/* Formulario */
.form { display: grid; gap: var(--e4); }
.campo { display: grid; gap: var(--e1); }
.campo label { font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--grafito); }
.campo input, .campo textarea {
  font-family: var(--texto); font-size: 16px; color: var(--tinta);
  background: var(--blanco); border: 1px solid var(--linea);
  padding: 12px var(--e3); width: 100%;
  transition: border-color var(--t-transicion);
}
.campo textarea { resize: vertical; min-height: 130px; }
.campo input:focus, .campo textarea:focus { outline: none; border-color: var(--senal); }
.campo input[aria-invalid="true"], .campo textarea[aria-invalid="true"] { border-color: #B00020; }
.error-msg { font-size: 13px; color: #B00020; min-height: 1.1em; display: flex; gap: 6px; align-items: center; }
.error-msg:not(:empty)::before {
  content: "!"; display: inline-grid; place-items: center;
  width: 15px; height: 15px; border-radius: 50%; background: #B00020; color: #fff;
  font-family: var(--mono); font-size: 10px; flex: 0 0 auto;
}

/* Estado de envío */
.form-estado { font-family: var(--mono); font-size: 14px; min-height: 1.2em; }
.form-estado[data-tipo="ok"] { color: var(--senal); }
.form-estado[data-tipo="error"] { color: #B00020; }

/* ================================================================== Footer */
.site-footer { background: var(--tinta); color: #B9BBBF; padding-block: var(--e7) var(--e5); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: var(--e6); }
.footer-brand { display: flex; align-items: center; gap: var(--e2); margin-bottom: var(--e3); }
.footer-brand img { width: 32px; height: 32px; border-radius: 50%; }
.footer-brand span { font-family: var(--display); font-variation-settings: 'wght' 600, 'wdth' 112; color: var(--blanco); }
.site-footer p { color: #8A8D93; font-size: 15px; }
.site-footer h3 { font-family: var(--mono); font-variation-settings: normal; font-weight: 500; font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: #8A8D93; margin-bottom: var(--e3); }
.footer-links { display: grid; gap: var(--e2); }
.footer-links a { font-size: 15px; color: #B9BBBF; transition: color var(--t-transicion); }
.footer-links a:hover { color: var(--blanco); }
.social { display: flex; gap: var(--e2); margin-top: var(--e3); }
.social a { width: 40px; height: 40px; border: 1px solid var(--linea-oscura); border-radius: 50%; display: grid; place-items: center; transition: border-color var(--t-transicion); }
.social a:hover { border-color: #55585E; }
.social svg { width: 18px; height: 18px; stroke: #B9BBBF; }
.footer-legal { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--e3); margin-top: var(--e7); padding-top: var(--e4); border-top: 1px solid var(--linea-oscura); font-size: 13px; color: #8A8D93; }

/* =============================================================== Animaciones */
.reveal { opacity: 0; transform: translateY(12px); transition: opacity 260ms ease, transform 260ms ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  * { scroll-behavior: auto !important; }
}

/* ================================================================ Responsive */
@media (max-width: 980px) {
  .contacto-grid { grid-template-columns: 1fr; gap: var(--e6); }
  .dos-bloques { grid-template-columns: 1fr; gap: var(--e6); }
  .razones { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .grid-problemas { grid-template-columns: 1fr; }
  .problema, .problema:nth-child(3n), .problema:nth-child(3n+1) { padding: var(--e5) 0; border-right: 0; }
  .grid-servicios { grid-template-columns: 1fr; }
  .momentos { grid-template-columns: 1fr; gap: var(--e5); }
  .grid-obras { grid-template-columns: 1fr; }
  .tech-capa { grid-template-columns: 1fr; gap: var(--e2); }
  .footer-grid { grid-template-columns: 1fr; gap: var(--e5); }
  .footer-brand + p { max-width: none; }
}
@media (max-width: 480px) {
  .razones { grid-template-columns: 1fr; }
}
@media (max-width: 420px) {
  .brand-name { display: none; }
}