/* ==========================================================================
   OpenBox Innova – Hoja de estilos global (v1)
   Paleta core: Negro (#000000) y Blanco (#FFFFFF)
   Diseño: limpio, contrastado, conversion-first
   ========================================================================== */

/* -------------------------
   Variables y Reset suave
   ------------------------- */
:root{
  /* Colores base */
  --color-bg: #FFFFFF;
  --color-fg: #000000;
  --color-muted: #B3B3B3;
  --color-border: #E6E6E6;

  /* Tipografía y escala */
  --font-sans: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --fs-900: clamp(2rem, 3vw + 1rem, 3rem);   /* H1 */
  --fs-800: clamp(1.5rem, 2.2vw + .8rem, 2.25rem); /* H2 */
  --fs-700: clamp(1.25rem, 1.6vw + .7rem, 1.5rem); /* H3 */
  --fs-600: 1.125rem;
  --fs-500: 1rem;
  --fs-400: .9375rem;

  /* Espaciado (8pt grid) */
  --space-1: .25rem;
  --space-2: .5rem;
  --space-3: .75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;

  /* Bordes / radios / sombras */
  --radius-sm: 6px;
  --radius-md: 10px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 8px 30px rgba(0,0,0,.08);

  /* Ancho contenedor */
  --container: 1200px;

  /* Duraciones */
  --speed-fast: 120ms;
  --speed: 220ms;
}

*,*::before,*::after{ box-sizing: border-box; }
html,body{ height: 100%; }
body{
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-fg);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

/* Contenedor centrado reutilizable */
.container{
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

/* Tipografía base */
h1,h2,h3{ line-height: 1.15; margin: 0 0 var(--space-3); }
h1{ font-size: var(--fs-900); letter-spacing: -.02em; }
h2{ font-size: var(--fs-800); letter-spacing: -.01em; }
h3{ font-size: var(--fs-700); }
p{ margin: 0 0 var(--space-4); font-size: var(--fs-500); }
small, .meta{ font-size: var(--fs-400); color: #444; }

/* -------------------------
   Header / Navegación
   ------------------------- */
header{
  position: sticky; top: 0; z-index: 100;
  background: var(--color-fg); color: var(--color-bg);
  box-shadow: var(--shadow-sm);
}
.header-inner{
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-4) 0;
}
.brand{
  display:flex; align-items:center; gap: var(--space-3);
}
.brand img{ height: 40px; width: auto; }
.brand .site-name{ font-weight: 800; letter-spacing: .02em; }

nav ul{
  list-style: none; margin: 0; padding: 0;
  display: flex; align-items: center; gap: var(--space-5);
}
nav a{
  text-decoration: none; font-weight: 700; letter-spacing: .01em;
  padding: .25rem .125rem; border-radius: var(--radius-sm);
  transition: opacity var(--speed-fast) ease;
}
nav a:hover{ opacity: .8; }
nav a:focus-visible{
  outline: 2px solid var(--color-bg);
  outline-offset: 2px;
}

/* -------------------------
   Hero (para Home o tops)
   ------------------------- */
.hero{
  padding: clamp(4rem, 8vw, 8rem) 0;
  background: #F7F7F7; /* si usas imagen, coloca background-image en línea */
  color: var(--color-fg);
}
.hero .eyebrow{
  text-transform: uppercase; letter-spacing: .12em;
  font-weight: 800; font-size: .8rem; opacity: .7; margin-bottom: var(--space-2);
}
.hero .lead{ font-size: var(--fs-600); max-width: 60ch; opacity: .9; }

/* -------------------------
   Botones / CTAs
   ------------------------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding: .8rem 1.1rem; border-radius: var(--radius-sm);
  border: 2px solid var(--color-fg);
  background: var(--color-fg); color: var(--color-bg);
  font-weight: 800; text-decoration: none; cursor: pointer;
  transition: transform var(--speed) ease, opacity var(--speed-fast) ease;
}
.btn:hover{ transform: translateY(-1px); opacity: .9; }
.btn:active{ transform: translateY(0); opacity: .95; }
.btn:focus-visible{ outline: 3px solid #fff; outline-offset: 2px; }
.btn--ghost{ background: transparent; color: var(--color-fg); }
.btn--light{ background: var(--color-bg); color: var(--color-fg); border-color: var(--color-bg); }

/* Enlaces con flecha para micro-conversiones */
.link-arrow{
  font-weight: 800; text-decoration: none; position: relative;
}
.link-arrow::after{
  content: "→"; margin-left: .4rem; transition: transform var(--speed-fast);
}
.link-arrow:hover::after{ transform: translateX(2px); }

/* -------------------------
   Secciones genéricas
   ------------------------- */
.section{ padding: var(--space-7) 0; }
.section--tight{ padding: var(--space-6) 0; }
.section header{ background: transparent; color: inherit; box-shadow: none; position: static; }

/* Intro de página (uso en Soluciones, Sectores, Casos) */
.intro{ margin-bottom: var(--space-6); }
.intro p{ font-size: var(--fs-600); max-width: 70ch; }

/* -------------------------
   Componentes de “Soluciones”
   ------------------------- */
.solutions-grid{
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-5);
}
.card{
  grid-column: span 12;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  background: #fff;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--speed-fast) ease, transform var(--speed-fast) ease;
}
.card:hover{ box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card h3{ margin-top: 0; font-size: var(--fs-700); }
.card .benefits{
  margin: var(--space-3) 0 var(--space-4);
  padding-left: 1.2rem;
}
.card .benefits li{ margin-bottom: .35rem; }

/* Distribución responsive (3 por fila en desktop) */
@media (min-width: 900px){
  .card{ grid-column: span 4; }
}

/* -------------------------
   Sectores – listados compactos
   ------------------------- */
.sectors{
  display: grid; gap: var(--space-4);
}
.sector-item{
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #fff;
}
.sector-item h3{ margin-bottom: .25rem; }

/* -------------------------
   Casos de Éxito – bloques
   ------------------------- */
.case{
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-5) 0;
}
.case:last-child{ border-bottom: 0; }
.case h3{ margin-bottom: .25rem; }
.case p{ margin: .35rem 0; }

/* -------------------------
   Formularios de contacto (si aplica)
   ------------------------- */
.form{
  display: grid; gap: var(--space-4); max-width: 680px;
}
.input, textarea, select{
  width: 100%; padding: .9rem 1rem;
  border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  font: inherit; background: #fff; color: var(--color-fg);
}
.input:focus, textarea:focus, select:focus{
  outline: 3px solid #000; outline-offset: 2px;
}

/* -------------------------
   Footer
   ------------------------- */
footer{
  background: var(--color-fg); color: var(--color-bg);
  padding: var(--space-5) 0; text-align: center;
}
footer a{ color: var(--color-bg); text-decoration: underline; }

/* -------------------------
   Utilidades (helpers)
   ------------------------- */
.center { text-align: center; }
.mt-0{ margin-top: 0 !important; }
.mt-4{ margin-top: var(--space-4) !important; }
.mt-6{ margin-top: var(--space-6) !important; }
.mb-0{ margin-bottom: 0 !important; }
.mb-2{ margin-bottom: var(--space-2) !important; }
.mb-4{ margin-bottom: var(--space-4) !important; }
.mb-6{ margin-bottom: var(--space-6) !important; }
.hidden{ display: none !important; }

/* -------------------------
   Responsivo
   ------------------------- */
@media (max-width: 900px){
  nav ul{ gap: var(--space-3); }
  .header-inner{ padding: var(--space-3) 0; }
  .intro p{ font-size: var(--fs-500); }
}

/* -------------------------
   Impresión (básico)
   ------------------------- */
@media print{
  header, footer{ display: none; }
  a::after{ content: " (" attr(href) ")"; font-size: .8em; }
}