/* =======================================================================
   ASISTENTE VIRTUAL OK — DESIGN SYSTEM v1.0
   Sistema de diseño B2B reutilizable.
   Incluye: tokens, tipografía, componentes base, utilidades responsive.
   No depende del proyecto: puede portarse a cualquier landing AVO.
   ======================================================================= */

/* -----------------------------------------------------------------------
   1. TOKENS — Variables CSS globales
   ----------------------------------------------------------------------- */
:root {
  /* Color · Marca AVO (azul oficial del logo) ------------------------ */
  --color-primary:        #29ABE2;    /* Azul claro oficial — CTAs, highlights, dots */
  --color-primary-dark:   #1B8FC3;    /* Hover de CTA primario */
  --color-primary-deep:   #0F6FA8;    /* Texto azul sobre fondo claro (contraste AA) */
  --color-primary-soft:   rgba(41, 171, 226, 0.12);   /* Fondos badges, eyebrows */
  --color-primary-border: rgba(41, 171, 226, 0.35);   /* Bordes badges */

  /* Aliases legacy (compatibilidad — apuntan al azul) --------------- */
  --color-brand-blue:      #29ABE2;
  --color-brand-blue-soft: rgba(41, 171, 226, 0.12);

  /* Color · Texto --------------------------------------------------- */
  --color-text:        #111111;
  --color-heading:     #111111;
  --color-text-muted:  #555555;
  --color-text-soft:   #6E7570;

  /* Color · Fondos (paleta de marca: blanco + negro) ---------------- */
  --color-bg:        #FFFFFF;          /* Blanco puro */
  --color-bg-soft:   #F4F6F8;          /* Gris muy claro con leve tinte azul */
  --color-bg-warm:   #EEF1F4;          /* Gris claro alternativo */
  --color-bg-dark:   #0A0E12;          /* Negro de marca */
  --color-bg-darker: #050709;          /* Negro absoluto puntual */

  /* Color · Bordes -------------------------------------------------- */
  --color-border:        #E2E6EA;
  --color-border-strong: #C8CFD6;
  --color-border-dark:   rgba(255, 255, 255, 0.08);

  /* Color · Sistema (semánticos) ------------------------------------ */
  --color-success: #29ABE2;
  --color-info:    #29ABE2;
  --color-warning: #F6C453;
  --color-danger:  #D33B3B;

  /* Tipografía ------------------------------------------------------ */
  --font-sans:    "Roboto", "Inter", "Segoe UI", Arial, sans-serif;
  --font-display: "Roboto", "Inter", "Segoe UI", Arial, sans-serif;
  --font-mono:    "JetBrains Mono", "SF Mono", Menlo, monospace;

  --fw-light:    300;
  --fw-regular:  400;
  --fw-medium:   500;
  --fw-semibold: 600;
  --fw-bold:     700;
  --fw-black:    900;

  /* Tamaños de fuente (escala fluida) -------------------------------- */
  --fs-xs:    0.8125rem;   /* 13px */
  --fs-sm:    0.875rem;    /* 14px */
  --fs-base:  1rem;        /* 16px */
  --fs-md:    1.0625rem;   /* 17px */
  --fs-lg:    1.125rem;    /* 18px */
  --fs-xl:    1.25rem;     /* 20px */
  --fs-2xl:   1.5rem;      /* 24px */
  --fs-3xl:   1.875rem;    /* 30px */
  --fs-4xl:   2.25rem;     /* 36px */
  --fs-5xl:   clamp(2rem, 1.2rem + 2.6vw, 3.25rem);   /* H2 */
  --fs-6xl:   clamp(2.5rem, 1.5rem + 4vw, 4.5rem);    /* Display / H1 */

  /* Line heights ----------------------------------------------------- */
  --lh-tight:    0.95;
  --lh-snug:     1.1;
  --lh-base:     1.5;
  --lh-relaxed:  1.6;

  /* Tracking --------------------------------------------------------- */
  --tracking-tight:  -0.025em;
  --tracking-snug:   -0.015em;
  --tracking-base:    0;
  --tracking-wide:    0.04em;
  --tracking-wider:   0.12em;

  /* Espaciado (token scale) ----------------------------------------- */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout ---------------------------------------------------------- */
  --container:        1160px;
  --container-narrow: 880px;
  --container-wide:   1280px;
  --gutter:           clamp(1rem, 0.5rem + 2vw, 2rem);

  /* Border radius --------------------------------------------------- */
  --radius-xs:   4px;
  --radius-sm:   8px;
  --radius-md:   16px;
  --radius-lg:   24px;
  --radius-xl:   32px;
  --radius-pill: 999px;

  /* Sombras --------------------------------------------------------- */
  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.10);
  --shadow-primary: 0 12px 32px rgba(67, 185, 87, 0.22);

  /* Transiciones ---------------------------------------------------- */
  --t-fast: 160ms cubic-bezier(0.4, 0, 0.2, 1);
  --t:      220ms cubic-bezier(0.4, 0, 0.2, 1);
  --t-slow: 360ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Z-index -------------------------------------------------------- */
  --z-nav:     50;
  --z-modal:   80;
  --z-toast:   90;
  --z-float:  100;
}

/* -----------------------------------------------------------------------
   2. RESET MINIMALISTA
   ----------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  font-weight: var(--fw-regular);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img, svg, video { display: block; max-width: 100%; }

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--t);
}

button { font-family: inherit; cursor: pointer; }

ul { padding: 0; margin: 0; list-style: none; }

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  color: var(--color-heading);
  letter-spacing: var(--tracking-snug);
  line-height: var(--lh-snug);
}

p { margin: 0; color: var(--color-text); }

::selection {
  background: rgba(41, 171, 226, 0.32);
  color: inherit;
}
::-moz-selection {
  background: rgba(41, 171, 226, 0.32);
  color: inherit;
}

/* -----------------------------------------------------------------------
   3. TIPOGRAFÍA — Display, Headings, Body
   ----------------------------------------------------------------------- */
.display-1,
.h1 {
  font-size: clamp(2.8rem, 1.6rem + 4.8vw, 5.4rem);
  font-weight: var(--fw-black);
  letter-spacing: -0.04em;
  line-height: 0.94;
  color: var(--color-heading);
  font-feature-settings: 'ss01', 'cv11';
}

.h2,
.section-title {
  font-size: clamp(2.1rem, 1.3rem + 2.8vw, 3.6rem);
  font-weight: var(--fw-black);
  letter-spacing: -0.03em;
  line-height: 1.02;
  color: var(--color-heading);
  font-feature-settings: 'ss01';
}

.h3 {
  font-size: clamp(1.4rem, 1rem + 1vw, 1.85rem);
  font-weight: var(--fw-bold);
  letter-spacing: var(--tracking-snug);
  line-height: 1.2;
}

.h4 {
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  letter-spacing: var(--tracking-snug);
  line-height: 1.25;
}

.lead,
.section-copy {
  font-size: var(--fs-lg);
  color: var(--color-text-muted);
  line-height: var(--lh-relaxed);
  max-width: 62ch;
}

.text-small { font-size: var(--fs-sm); }
.text-xs    { font-size: var(--fs-xs); }

.text-muted { color: var(--color-text-muted); }
.text-soft  { color: var(--color-text-soft); }
.text-primary { color: var(--color-primary-deep); }
.text-light { color: rgba(255, 255, 255, 0.9); }

/* Highlight (palabra clave en verde) */
.hl {
  color: var(--color-primary-deep);
  font-weight: inherit;
}

/* <em> dentro de display headings = highlight azul (no italic) */
.display-1 em,
.display-2 em,
.h1 em,
.h2 em,
.section-title em,
.page-hero h1 em,
.article-hero h1 em,
.blog-hero h1 em,
.cta-final h2 em,
.callout h2 em,
.kicker em,
.bigidea-main h2 em,
.metodo-content h3 em {
  font-style: normal;
  color: var(--color-primary-deep);
  font-weight: inherit;
}
.display-1--on-dark em,
.display-2--on-dark em,
.section--dark em { color: var(--color-primary); }
.hl-underline {
  background: linear-gradient(transparent 62%, var(--color-primary-soft) 62%);
  padding: 0 4px;
  border-radius: 4px;
}

/* Eyebrow ------------------------------------------------------------
   Ocultos globalmente — el nivel corporativo no requiere tags decorativos
   antes del titular. Solo el headline carga la jerarquía. */
.eyebrow,
.eyebrow--on-dark,
.eyebrow--dark { display: none !important; }
.eyebrow-dot { display: none !important; }

/* -----------------------------------------------------------------------
   4. LAYOUT — Container, Section, Grid
   ----------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.container--narrow { max-width: var(--container-narrow); }
.container--wide   { max-width: var(--container-wide); }

.section {
  padding: clamp(72px, 8vw, 140px) 0;
  background: var(--color-bg);
  position: relative;
}
.section--soft  { background: var(--color-bg-soft); }
.section--warm  { background: var(--color-bg-warm); }
.section--dark  {
  background: var(--color-bg-dark);
  color: #fff;
}
.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4 { color: #fff; }
.section--dark p  { color: rgba(255,255,255,0.78); }

.section-head {
  max-width: 880px;
  margin: 0 auto var(--space-20);
  text-align: center;
}
.section-head--left,
.section-head--editorial {
  text-align: left;
  margin: 0 0 clamp(56px, 6vw, 96px);
  max-width: 980px;
}
.section-head .section-title { margin-bottom: var(--space-6); }
.section-head .lead {
  margin-top: var(--space-5);
  max-width: 62ch;
  color: var(--color-text-muted);
  font-size: 1.1rem;
  line-height: 1.55;
}

/* Grids ------------------------------------------------------------- */
.grid     { display: grid; gap: var(--space-6); }
.grid-2   { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); }
.grid-3   { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.grid-4   { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-5); }

/* Stack vertical genérico */
.stack-4  > * + * { margin-top: var(--space-4); }
.stack-6  > * + * { margin-top: var(--space-6); }
.stack-8  > * + * { margin-top: var(--space-8); }

@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* -----------------------------------------------------------------------
   5. BOTONES
   ----------------------------------------------------------------------- */
.btn {
  --btn-pad-y: 14px;
  --btn-pad-x: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--btn-pad-y) var(--btn-pad-x);
  border-radius: var(--radius-pill);
  font-family: var(--font-sans);
  font-weight: var(--fw-bold);
  font-size: 0.95rem;
  letter-spacing: 0.005em;
  line-height: 1.1;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--t-fast),
              background var(--t),
              color var(--t),
              border-color var(--t),
              box-shadow var(--t);
  white-space: nowrap;
  user-select: none;
  text-decoration: none;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:focus-visible {
  outline: 3px solid rgba(97, 206, 112, 0.45);
  outline-offset: 3px;
}
.btn:disabled, .btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text);
  border-color: var(--color-primary);
  box-shadow: 0 8px 20px rgba(67, 185, 87, 0.25);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-text);
}

.btn-secondary {
  background: #fff;
  color: var(--color-text);
  border-color: var(--color-border-strong);
}
.btn-secondary:hover {
  background: var(--color-bg-soft);
  border-color: var(--color-text);
}

.btn-dark {
  background: var(--color-bg-dark);
  color: #fff;
  border-color: var(--color-bg-dark);
}
.btn-dark:hover {
  background: #000;
  color: var(--color-primary);
  border-color: #000;
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: transparent;
}
.btn-ghost:hover {
  background: var(--color-bg-soft);
  color: var(--color-text);
}

.btn-on-dark {
  background: #fff;
  color: var(--color-text);
  border-color: #fff;
}
.btn-on-dark:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text);
}

.btn-sm    { --btn-pad-y: 10px; --btn-pad-x: 16px; font-size: 0.86rem; }
.btn-lg    { --btn-pad-y: 16px; --btn-pad-x: 28px; font-size: 1rem; }
.btn-block { display: flex; width: 100%; }

/* -----------------------------------------------------------------------
   6. BADGES, CHIPS, TAGS
   ----------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-primary-soft);
  color: var(--color-text);
  border: 1px solid var(--color-primary-border);
  border-radius: var(--radius-pill);
  padding: 8px 14px;
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  line-height: 1;
}
.badge .badge-dot {
  width: 8px; height: 8px; border-radius: var(--radius-pill);
  background: var(--color-primary);
}
.badge--solid {
  background: var(--color-primary);
  border-color: var(--color-primary);
}
.badge--ghost {
  background: transparent;
  border-color: var(--color-border-strong);
  color: var(--color-text);
}
.badge--dark {
  background: var(--color-bg-dark);
  color: var(--color-primary);
  border-color: transparent;
}

/* Chip — variante outline blanca */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 8px 14px;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text);
}
.chip-tick {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px; height: 18px;
  background: var(--color-primary);
  color: var(--color-text);
  border-radius: var(--radius-pill);
  font-size: 11px;
  font-weight: var(--fw-bold);
}

/* -----------------------------------------------------------------------
   7. LINK-ARROW (CTA tipo enlace con flecha)
   ----------------------------------------------------------------------- */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: var(--fw-semibold);
  color: var(--color-text);
  padding-bottom: 4px;
  position: relative;
  transition: gap var(--t), color var(--t);
}
.link-arrow::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: currentColor;
  transform-origin: right;
  transition: transform var(--t);
}
.link-arrow:hover { gap: 12px; color: var(--color-primary-deep); }
.link-arrow:hover::after { transform: scaleX(0); transform-origin: left; }
.link-arrow--on-dark { color: #fff; }
.link-arrow--on-dark:hover { color: var(--color-primary); }

/* -----------------------------------------------------------------------
   8. CARDS
   ----------------------------------------------------------------------- */
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: transform var(--t), border-color var(--t), box-shadow var(--t);
}
.card:hover {
  transform: translateY(-3px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
}
.card--soft   { background: var(--color-bg-soft); }
.card--dark   { background: var(--color-bg-dark); color: #fff; border-color: transparent; }
.card--dark h3, .card--dark h4 { color: #fff; }
.card--dark p { color: rgba(255,255,255,0.78); }
.card--flush  { padding: 0; overflow: hidden; }
.card--compact { padding: var(--space-6); }

/* Card con línea superior verde (acento) */
.card-accent { position: relative; overflow: hidden; }
.card-accent::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t);
}
.card-accent:hover::before { transform: scaleX(1); }
.card-accent--always::before { transform: scaleX(1); }

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-primary-soft);
  color: var(--color-primary-deep);
  margin-bottom: var(--space-5);
}
.card-icon--solid {
  background: var(--color-primary);
  color: var(--color-text);
}

/* Card numerada para procesos */
.card-step .card-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px; height: 42px;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-weight: var(--fw-bold);
  font-size: 0.95rem;
  margin-bottom: var(--space-5);
}

/* -----------------------------------------------------------------------
   9. FORMULARIOS
   ----------------------------------------------------------------------- */
.form-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-10);
  box-shadow: var(--shadow-md);
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: var(--space-4);
}
.input-group--full { grid-column: 1 / -1; }
.input-group .label,
.input-group > span:first-child {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-heading);
  letter-spacing: var(--tracking-snug);
}
.input-group .required,
.input-group em { color: var(--color-primary-deep); font-style: normal; }

.input,
.input-group input,
.input-group select,
.input-group textarea {
  font-family: inherit;
  font-size: var(--fs-base);
  color: var(--color-text);
  background: #fff;
  border: 1px solid #DDE2DD;
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  width: 100%;
  transition: border-color var(--t), box-shadow var(--t);
}
.input-group textarea { resize: vertical; min-height: 96px; }
.input:focus,
.input-group input:focus,
.input-group select:focus,
.input-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(97, 206, 112, 0.16);
}
.input[aria-invalid="true"],
.input-group input[aria-invalid="true"],
.input-group select[aria-invalid="true"],
.input-group textarea[aria-invalid="true"] {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 4px rgba(211, 59, 59, 0.12);
}

.input-help,
.form-hint {
  display: block;
  font-size: var(--fs-xs);
  color: var(--color-text-soft);
  margin-top: 4px;
}

.form-check {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}
.form-check input { margin-top: 3px; accent-color: var(--color-primary); }
.form-check a     { color: var(--color-primary-deep); text-decoration: underline; }
.form-check em    { color: var(--color-primary-deep); font-style: normal; }

.form-success {
  background: var(--color-primary-soft);
  border: 1px solid var(--color-primary-border);
  color: var(--color-primary-deep);
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  font-weight: var(--fw-medium);
}
.form-error {
  background: #fff0f0;
  border: 1px solid #f3c2c2;
  color: #a23030;
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  font-weight: var(--fw-medium);
}

/* -----------------------------------------------------------------------
   10. BRAND MARK
   ----------------------------------------------------------------------- */
.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}
.brand-mark-glyph {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.brand-mark-text {
  display: inline-flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand-mark-title {
  font-weight: var(--fw-bold);
  font-size: 1.02rem;
  letter-spacing: var(--tracking-snug);
  color: var(--color-heading);
}
.brand-mark-sub {
  font-size: 0.74rem;
  color: var(--color-text-soft);
  letter-spacing: 0.02em;
}
.brand-mark--on-dark .brand-mark-title { color: #fff; }
.brand-mark--on-dark .brand-mark-sub   { color: rgba(255, 255, 255, 0.5); }

/* -----------------------------------------------------------------------
   11. UTILIDADES
   ----------------------------------------------------------------------- */
.flex      { display: flex; }
.flex-col  { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.items-start  { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center  { justify-content: center; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-10 { margin-top: var(--space-10); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

.w-full   { width: 100%; }
.text-center { text-align: center; }
.text-left   { text-align: left; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0;
  margin: -1px; overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* -----------------------------------------------------------------------
   12. RESPONSIVE — Mobile fallback global
   ----------------------------------------------------------------------- */
@media (max-width: 640px) {
  .section { padding: var(--space-16) 0; }
  .form-card { padding: var(--space-6); }
  .card, .card--compact { padding: var(--space-6); }
  .btn { width: auto; }
  .btn-block { width: 100%; }
  .nav-cta-stack .btn,
  .hero-actions .btn { width: 100%; }
}

/* -----------------------------------------------------------------------
   13. ACCESIBILIDAD — reduced motion
   ----------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}