/* ==========================================================================
   Datassa — hoja de estilos
   Paleta y tipografías derivadas del logo (gris #3A3A3A + cyan #00A8D3).
   Sin frameworks. Mobile-first con dos cortes: 640 px y 960 px.
   ========================================================================== */

:root {
  --cyan: #00A8D3;          /* acento, sacado del logo */
  --cyan-text: #007A9C;     /* cyan para texto chico sobre claro (pasa AA) */
  --cyan-tint: #E6F6FA;
  --charcoal-900: #1E2022;  /* texto principal / footer */
  --charcoal-800: #26292C;  /* fondo oscuro de secciones */
  --charcoal-700: #2F3336;  /* tarjetas sobre oscuro */
  --charcoal-600: #3A3A3A;  /* gris del logo */
  --grey-500: #5C6166;      /* texto secundario sobre claro */
  --grey-400: #8A9096;
  --grey-300: #B8BEC4;      /* texto secundario sobre oscuro */
  --grey-200: #C9D0D5;
  --grey-100: #E2E6E9;      /* bordes */
  --ground: #F5F7F8;        /* fondo claro */
  --white: #FFFFFF;

  --font-display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --font-body: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "Courier New", monospace;

  --radius-s: 6px;
  --radius-m: 12px;
  --container: 1200px;
  --gutter: 24px;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--charcoal-900);
  background: var(--ground);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--cyan-text); text-decoration: none; }
a:hover { color: #005F7A; }
h1, h2, h3 { font-family: var(--font-display); letter-spacing: -0.02em; margin: 0; line-height: 1.12; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

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

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--cyan-text);
}
.on-dark .eyebrow { color: var(--cyan); }

.section { padding: 72px 0; }
.section-head { display: flex; flex-direction: column; gap: 16px; max-width: 760px; margin-bottom: 40px; }
.section-head h2 { font-size: clamp(30px, 4.2vw, 44px); }
.section-head p { color: var(--grey-500); }

.on-dark { background: var(--charcoal-800); color: var(--white); }
.on-dark h2, .on-dark h3 { color: var(--white); }
.on-dark p { color: var(--grey-300); }
.on-white { background: var(--white); border-top: 1px solid var(--grey-100); border-bottom: 1px solid var(--grey-100); }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 16px 24px;
  border-radius: var(--radius-s);
  font-weight: 600; font-size: 16px; line-height: 1.2;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color .15s ease, border-color .15s ease;
}
.btn svg { flex-shrink: 0; }
.btn-primary { background: var(--cyan); color: var(--charcoal-900); }
.btn-primary:hover { background: #1FB6E0; color: var(--charcoal-900); }
.btn-ghost { color: var(--white); border-color: rgba(255,255,255,0.28); background: transparent; }
.btn-ghost:hover { border-color: rgba(255,255,255,0.6); color: var(--white); }
.btn-outline { color: var(--charcoal-900); border-color: var(--grey-200); background: var(--white); }
.btn-outline:hover { border-color: var(--charcoal-600); color: var(--charcoal-900); }
.btn-block { width: 100%; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--charcoal-800);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-iso { height: 30px; width: auto; }
.brand-word { height: 11px; width: auto; }

.nav-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border: 0; background: transparent; color: var(--white); cursor: pointer;
}
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-menu { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

.site-nav {
  display: none;
  position: absolute; left: 0; right: 0; top: 68px;
  background: var(--charcoal-800);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding: 8px var(--gutter) 20px;
  flex-direction: column; gap: 4px;
}
.site-nav.is-open { display: flex; }
.site-nav a { color: #D9DEE2; font-weight: 500; padding: 12px 0; font-size: 17px; }
.site-nav a:hover { color: var(--white); }
.site-nav .btn { margin-top: 12px; }

/* ---------- Hero ---------- */
.hero {
  background-color: var(--charcoal-800);
  background-image: radial-gradient(rgba(255,255,255,0.10) 1.2px, transparent 1.2px);
  background-size: 26px 26px;
  color: var(--white);
  padding: 56px 0 64px;
}
.hero .container { display: flex; flex-direction: column; gap: 24px; }
.hero-copy { display: flex; flex-direction: column; gap: 20px; }
.hero-iso { width: 120px; }
.hero h1 { font-size: clamp(36px, 5vw, 64px); line-height: 1.05; font-weight: 700; }
.hero-lead { font-size: clamp(17px, 2vw, 20px); color: var(--grey-300); max-width: 600px; }
.hero-actions { display: flex; flex-direction: column; gap: 12px; margin-top: 4px; }
.hero-note { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--grey-400); }

/* ---------- Franja de herramientas ---------- */
.tools { background: var(--charcoal-900); color: var(--grey-300); padding: 18px 0; }
.tools .container { display: flex; flex-direction: column; gap: 10px; }
.tools-label { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--grey-400); }
.tools ul { display: flex; flex-wrap: wrap; gap: 10px 28px; font-family: var(--font-display); font-weight: 500; font-size: 15px; }

/* ---------- Método ---------- */
.method-intro { display: flex; flex-direction: column; gap: 24px; margin-bottom: 40px; }
.method-intro h2 { font-size: clamp(26px, 3.6vw, 44px); max-width: 760px; }
.method-intro p { color: var(--grey-500); max-width: 360px; }
.cards { display: grid; grid-template-columns: 1fr; gap: 20px; }
.card {
  background: var(--white);
  border: 1px solid var(--grey-100);
  border-radius: var(--radius-m);
  padding: 32px;
  display: flex; flex-direction: column; gap: 16px;
}
.card-top { display: flex; justify-content: space-between; align-items: center; }
.card-num { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.14em; color: var(--cyan-text); font-weight: 500; }
.card h3 { font-size: 24px; }
.card p { color: var(--grey-500); font-size: 16px; }
.card-tag { font-size: 14px; color: var(--grey-400); }
.card-dark { background: var(--charcoal-800); border-color: var(--charcoal-800); }
.card-dark h3 { color: var(--white); }
.card-dark p { color: var(--grey-300); }
.card-dark .card-num { color: var(--cyan); }
.card-icon { color: var(--charcoal-900); }
.card-dark .card-icon { color: var(--white); }
.card .service-icon { color: var(--cyan-text); }
.card-badge {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  background: var(--cyan-tint); color: var(--charcoal-900); padding: 6px 10px; border-radius: 4px;
}
.card-note { font-size: 15px; font-weight: 600; color: var(--cyan-text); }

/* ---------- Situaciones ---------- */
.situations { display: flex; flex-direction: column; gap: 32px; }
.situations-intro { display: flex; flex-direction: column; gap: 14px; }
.situations-intro h2 { font-size: clamp(28px, 3.6vw, 40px); }
.situations-intro p { color: var(--grey-500); }
.situation { display: flex; gap: 20px; padding: 24px 0; border-top: 1px solid var(--grey-100); }
.situation:last-child { border-bottom: 1px solid var(--grey-100); }
.situation-key { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.14em; color: var(--grey-400); width: 28px; flex-shrink: 0; padding-top: 6px; }
.situation h3 { font-size: 21px; margin-bottom: 8px; }
.situation p { color: var(--grey-500); font-size: 16px; }

/* ---------- Casos ---------- */
.case { background: var(--charcoal-700); border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius-m); padding: 32px; display: flex; flex-direction: column; gap: 18px; }
.case-sector { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--grey-400); }
.case h3 { font-size: 24px; line-height: 1.2; }
.case p { font-size: 16px; }
/* ---------- Sobre Mateo ---------- */
.about { display: flex; flex-direction: column; gap: 32px; }
.about-photo {
  width: 100%; max-width: 460px; aspect-ratio: 460 / 540;
  border-radius: var(--radius-m);
  background-color: #E9EDEF;
  background-image: linear-gradient(rgba(30,32,34,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(30,32,34,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  overflow: hidden;
}
.about-photo img { width: 100%; height: 100%; object-fit: cover; }
.about-text { display: flex; flex-direction: column; gap: 20px; }
.about-text h2 { font-size: clamp(28px, 3.6vw, 44px); }
.about-text p { color: var(--grey-500); font-size: 18px; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip { font-size: 14px; font-weight: 500; padding: 8px 14px; border: 1px solid var(--grey-200); border-radius: 999px; }
.link-arrow { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; }

/* ---------- Visión ---------- */
.vision { background: var(--cyan); color: var(--charcoal-900); padding: 64px 0; }
.vision .eyebrow { color: var(--charcoal-900); }
.vision h2 { font-size: clamp(26px, 3.6vw, 40px); max-width: 1000px; margin: 16px 0 20px; color: var(--charcoal-900); }
.vision p { max-width: 720px; color: var(--charcoal-900); opacity: .85; }

/* ---------- Contacto ---------- */
.contact { display: flex; flex-direction: column; gap: 40px; }
.contact-text { display: flex; flex-direction: column; gap: 20px; }
.contact-text h2 { font-size: clamp(28px, 3.6vw, 44px); }
.contact-text > p { color: var(--grey-500); }
.checks { display: flex; flex-direction: column; gap: 12px; }
.checks li { display: flex; gap: 12px; align-items: center; font-size: 16px; }
.checks svg { color: var(--cyan-text); flex-shrink: 0; }

.form {
  background: var(--ground); border: 1px solid var(--grey-100); border-radius: var(--radius-m);
  padding: 28px; display: flex; flex-direction: column; gap: 18px;
}
.form-row { display: grid; grid-template-columns: 1fr; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field label { font-size: 14px; font-weight: 600; }
.field input, .field textarea {
  font-family: var(--font-body); font-size: 16px; color: var(--charcoal-900);
  background: var(--white); border: 1px solid var(--grey-200); border-radius: var(--radius-s);
  padding: 12px 14px; width: 100%;
}
.field input { height: 48px; }
.field textarea { resize: vertical; min-height: 120px; }
.field input:focus, .field textarea:focus { border-color: var(--cyan); outline: none; box-shadow: 0 0 0 3px rgba(0,168,211,0.25); }
.form-hint { font-size: 13px; color: var(--grey-400); }
.form-status { font-size: 15px; font-weight: 500; display: none; }
.form-status.is-ok { display: block; color: #1B7F3B; }
.form-status.is-error { display: block; color: #B42318; }
.honeypot { position: absolute; left: -9999px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--charcoal-900); color: var(--grey-400); padding: 56px 0 32px; margin-top: auto; }
.footer-top { display: flex; flex-direction: column; gap: 40px; }
.footer-brand { display: flex; flex-direction: column; gap: 16px; max-width: 360px; }
.footer-brand p { font-size: 15px; }
.footer-cols { display: flex; gap: 56px; }
.footer-col { display: flex; flex-direction: column; gap: 10px; font-size: 15px; }
.footer-col span { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--grey-500); margin-bottom: 4px; }
.footer-col a { color: #D9DEE2; }
.footer-col a:hover { color: var(--white); }
.footer-bottom {
  display: flex; flex-direction: column; gap: 10px;
  margin-top: 40px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 13px; color: var(--grey-500);
}
.footer-bottom em { color: var(--grey-400); }

/* ---------- WhatsApp flotante ---------- */
.wa-float {
  position: fixed; right: 20px; bottom: 20px; z-index: 40;
  width: 56px; height: 56px; border-radius: 50%;
  background: #25D366; color: var(--white);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 20px rgba(0,0,0,0.25);
}
.wa-float:hover { color: var(--white); background: #1EBE5A; }

/* ==========================================================================
   Tablet ≥ 640 px
   ========================================================================== */
@media (min-width: 640px) {
  .section { padding: 96px 0; }
  .hero { padding: 80px 0 88px; }
  .hero-actions { flex-direction: row; align-items: center; }
  .btn-block { width: auto; }
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cards-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .form { padding: 36px; }
  .form-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tools .container { flex-direction: row; align-items: center; justify-content: space-between; }
  .footer-bottom { flex-direction: row; justify-content: space-between; align-items: center; }
}

/* ==========================================================================
   Desktop ≥ 960 px
   ========================================================================== */
@media (min-width: 960px) {
  .site-header .container { height: 84px; }
  .brand-iso { height: 34px; }
  .brand-word { height: 12px; }
  .nav-toggle { display: none; }
  .site-nav {
    display: flex; position: static; flex-direction: row; align-items: center; gap: 36px;
    background: transparent; border: 0; padding: 0;
  }
  .site-nav a { padding: 0; font-size: 15px; }
  .site-nav .btn { margin: 0; padding: 12px 20px; font-size: 15px; }

  .hero { padding: 96px 0 104px; }
  .hero .container { flex-direction: row; align-items: center; justify-content: space-between; gap: 64px; }
  .hero-copy { max-width: 700px; }
  .hero-iso { width: 400px; flex-shrink: 0; }
  .hero-copy { gap: 28px; }
  .hero-iso-mobile { display: none; }

  .method-intro { flex-direction: row; justify-content: space-between; align-items: flex-end; gap: 48px; }
  .cards-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .card { padding: 36px; }

  .situations { flex-direction: row; gap: 80px; align-items: flex-start; }
  .situations-intro { width: 380px; flex-shrink: 0; }
  .situations-list { flex-grow: 1; }
  .situation { gap: 32px; padding: 28px 0; }
  .situation-key { width: 40px; }

  .case { padding: 40px; }
  .case h3 { font-size: 28px; }

  .about { flex-direction: row; gap: 80px; align-items: center; }
  .about-photo { width: 460px; flex-shrink: 0; }

  .vision { padding: 88px 0; }

  .contact { flex-direction: row; gap: 96px; align-items: flex-start; }
  .contact-text { width: 480px; flex-shrink: 0; }
  .form { flex-grow: 1; padding: 40px; }

  .footer-top { flex-direction: row; justify-content: space-between; align-items: flex-start; }
  .footer-cols { gap: 80px; }
}

@media (max-width: 959px) {
  .hero-iso { display: none; }
  .hero-iso-mobile { display: block; width: 120px; }
}