/* ===================================================================
 *  Befert.cl — Hoja de estilos principal (main.css)
 *  ------------------------------------------------------------------
 *  Sistema de diseño mobile-first con tokens Befert.
 *  Variables corporativas (sección 6 del documento):
 *    Azul   #187498   principal / confianza
 *    Rojo   #eb5353   CTA / conversión
 *    Verde  #36ae7c   éxito / estados positivos
 *    Amarillo #f9d923 destacados
 *    Gris   #353639   texto
 *    Arena  #d4ad9d   fondos suaves
 *    Blanco #fefefe   fondo principal
 *
 *  Tipografía: Montserrat (títulos) · Open Sans (cuerpo)
 *  Selectores BEM-ish (.block, .block__elem, .block--mod).
 * =================================================================== */

/* ----- Tokens del sistema ----------------------------------------- */
:root {
    /* Paleta Befert */
    --c-primary:   #187498;
    --c-primary-d: #135877;
    --c-primary-l: #1f93bd;
    --c-accent:    #06b6d4;          /* Cyan IA / Presencia Digital */
    --c-accent-rgb: 6, 182, 212;
    --c-cta:       #eb5353;
    --c-cta-d:     #d13d3d;
    --c-success:   #36ae7c;
    --c-highlight: #f9d923;
    --c-text:      #353639;
    --c-soft:      #d4ad9d;
    --c-white:     #fefefe;

    /* Derivados neutros */
    --c-bg:        #fefefe;
    --c-bg-alt:    #f5f7f9;
    --c-bg-soft:   #faf3ef;          /* tinte arena muy suave */
    --c-border:    #e4e9ee;
    --c-muted:     #6b7780;
    --c-primary-soft: rgba(24, 116, 152, 0.08);
    --c-cta-soft:     rgba(235, 83, 83, 0.10);

    /* Tipografía */
    --font-heading: 'Montserrat', system-ui, -apple-system, "Segoe UI", sans-serif;
    --font-body:    'Open Sans', system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

    /* Radios */
    --r-sm:   8px;
    --r-md:  14px;
    --r-lg:  22px;
    --r-pill: 999px;

    /* Sombras */
    --sh-sm: 0 1px 3px rgba(53,54,57,.06), 0 1px 2px rgba(53,54,57,.04);
    --sh-md: 0 10px 25px -8px rgba(24,116,152,.12), 0 6px 12px -6px rgba(53,54,57,.06);
    --sh-lg: 0 24px 50px -12px rgba(24,116,152,.18);

    /* Ritmo */
    --container: 1200px;
    --space-section: clamp(3rem, 6vw, 5rem);

    /* Transiciones */
    --t-fast: .18s ease;
    --t-smooth: .3s cubic-bezier(.4,0,.2,1);
    --t-bounce: .45s cubic-bezier(.175,.885,.32,1.275);

    --header-h: 70px;
}

/* ----- Reset ------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

body {
    font-family: var(--font-body);
    color: var(--c-text);
    background: var(--c-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

img, svg, video { max-width: 100%; display: block; }
a { color: var(--c-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font-family: inherit; }

/* ----- Tipografía ------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--c-text);
    letter-spacing: -0.01em;
}
h1 { font-size: clamp(2rem, 5vw, 3rem); margin-bottom: 1rem; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); margin-bottom: .85rem; }
h3 { font-size: clamp(1.2rem, 2vw, 1.45rem); margin-bottom: .6rem; }
p  { margin-bottom: 1rem; }
.eyebrow {
    display: inline-block;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: .8rem;
    text-transform: uppercase;
    letter-spacing: .12em;
    color: var(--c-primary);
    background: var(--c-primary-soft);
    padding: .35rem .8rem;
    border-radius: var(--r-pill);
    margin-bottom: .9rem;
}
.muted { color: var(--c-muted); }

/* ----- Layout ----------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: 1.25rem;
}
.section { padding-block: var(--space-section); }
.section--tight { padding-block: clamp(2rem, 4vw, 3rem); }
.section--alt { background: var(--c-bg-alt); }
.section--soft { background: var(--c-bg-soft); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto clamp(2rem, 4vw, 3rem); }
.section-head .muted { margin-top: .35rem; }

/* ----- Skip link (accesibilidad) --------------------------------- */
.skip-link {
    position: absolute; left: 0; top: -100px;
    background: var(--c-cta); color: #fff;
    padding: .6rem 1rem; z-index: 9999;
    font-weight: 600; border-radius: 0 0 var(--r-sm) var(--r-sm);
    transition: top var(--t-fast);
}
.skip-link:focus { top: 0; }

/* ----- Header ----------------------------------------------------- */
.site-header {
    position: fixed; top: 0; left: 0; right: 0;
    height: var(--header-h);
    background: rgba(254,254,254,.85);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--c-border);
    z-index: 1000;
    transition: var(--t-smooth);
}
.site-header.is-scrolled {
    height: 60px;
    box-shadow: var(--sh-sm);
}
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    height: 100%;
}
.brand {
    display: inline-flex; align-items: center; gap: .55rem;
    font-family: var(--font-heading); font-weight: 800;
    font-size: 1.35rem; color: var(--c-primary);
    text-decoration: none;
}
.brand__mark {
    width: 34px; height: 34px;
    background: linear-gradient(135deg, var(--c-primary), var(--c-soft));
    color: #fff; border-radius: var(--r-sm);
    display: grid; place-items: center;
    font-size: 1.1rem; font-weight: 800;
}
.nav {
    display: none; /* mobile-first: visible en desktop */
    align-items: center; gap: 1.4rem;
}
.nav__link {
    color: var(--c-text);
    font-weight: 600; font-size: .95rem;
    padding: .25rem 0;
    border-bottom: 2px solid transparent;
    transition: var(--t-fast);
    text-decoration: none;
}
.nav__link:hover, .nav__link.active, .nav__link:focus {
    color: var(--c-primary);
    border-bottom-color: var(--c-primary);
    text-decoration: none;
}
.nav__cta { margin-left: .5rem; }

.nav-toggle {
    display: inline-flex; flex-direction: column; gap: 5px;
    background: none; border: 0; cursor: pointer;
    padding: 8px; width: 40px;
}
.nav-toggle span {
    width: 22px; height: 2px; background: var(--c-text);
    transition: var(--t-fast); border-radius: 2px;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Menú mobile drawer */
.nav.is-open {
    display: flex; flex-direction: column;
    position: fixed; top: 0; right: 0;
    width: min(320px, 85vw); height: 100dvh;
    background: var(--c-white);
    padding: calc(var(--header-h) + 1rem) 1.5rem 1.5rem;
    gap: 0; z-index: 999;
    box-shadow: -10px 0 30px rgba(0,0,0,.12);
    transform: translateX(100%);
    transition: transform var(--t-smooth);
}
.nav.is-open.slide-in { transform: translateX(0); }
.nav.is-open .nav__link {
    padding: .9rem 0;
    border-bottom: 1px solid var(--c-border);
}
.nav.is-open .nav__cta { margin-top: 1.2rem; }
body.menu-open { overflow: hidden; }
.nav-backdrop {
    position: fixed; inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 998; opacity: 0; visibility: hidden;
    transition: var(--t-fast);
}
.nav-backdrop.is-visible { opacity: 1; visibility: visible; }
.site-main { min-height: 60vh; }



/* ----- Hero ------------------------------------------------------- */
.hero {
    padding-top: calc(var(--header-h) + clamp(2rem, 5vw, 4rem));
    background:
        radial-gradient(circle at 85% 15%, rgba(6, 182, 212, 0.12), transparent 55%),
        radial-gradient(circle at 5% 90%, rgba(24, 116, 152, 0.08), transparent 60%),
        linear-gradient(rgba(24, 116, 152, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(24, 116, 152, 0.03) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
}
.hero-grid {
    display: grid; gap: 2.5rem;
    grid-template-columns: 1fr;
    align-items: center;
}
.hero-lead { font-size: 1.1rem; color: var(--c-muted); max-width: 540px; margin-bottom: 1.6rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .9rem; margin-bottom: 1.5rem; }
.hero-badges { list-style: none; display: flex; flex-wrap: wrap; gap: .6rem 1.2rem; color: var(--c-muted); font-size: .9rem; }
.hero-badges li::before { content: ""; }

/* Mockup flotante del hero */
.hero-mockup {
    background: rgba(254,254,254,.9);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--c-border);
    border-radius: var(--r-lg);
    box-shadow: var(--sh-lg);
    overflow: hidden;
    animation: float 6s ease-in-out infinite;
}
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
.mockup-header {
    display: flex; align-items: center; justify-content: space-between;
    background: var(--c-bg-alt);
    padding: .75rem 1.25rem;
    border-bottom: 1px solid var(--c-border);
}
.mockup-dots { display: inline-flex; gap: 6px; }
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.dot--red    { background: #ff5f56; }
.dot--yellow { background: #ffbd2e; }
.dot--green  { background: #27c93f; }
.mockup-tag {
    font-size: .72rem; font-weight: 700; color: var(--c-primary);
    text-transform: uppercase; letter-spacing: .08em;
    display: inline-flex; align-items: center; gap: 6px;
}
.pulse {
    width: 7px; height: 7px; background: var(--c-success);
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(54,174,124,.6);
    animation: pulseRing 2s infinite;
}
@keyframes pulseRing {
    0%   { box-shadow: 0 0 0 0 rgba(54,174,124,.55); }
    70%  { box-shadow: 0 0 0 8px rgba(54,174,124,0); }
    100% { box-shadow: 0 0 0 0 rgba(54,174,124,0); }
}
.mockup-body { padding: 1.4rem; }
.mockup-row {
    display: flex; align-items: center; gap: 1rem;
    padding: .7rem 0;
    border-bottom: 1px solid var(--c-border);
}
.mockup-row:last-of-type { border-bottom: 0; }
.mockup-row strong { display: block; font-size: .92rem; }
.mockup-row span { font-size: .78rem; color: var(--c-muted); }
.mockup-icon {
    width: 38px; height: 38px; border-radius: 50%;
    display: grid; place-items: center; font-size: 1.05rem;
    flex-shrink: 0;
}
.mockup-icon--green { background: rgba(54,174,124,.12); color: var(--c-success); }
.mockup-icon--blue  { background: rgba(24,116,152,.12); color: var(--c-primary); }
.mockup-chart { margin-top: 1rem; padding-top: 1rem; border-top: 1px dashed var(--c-border); }
.mockup-chart__label { display: flex; justify-content: space-between; font-size: .75rem; color: var(--c-muted); margin-bottom: 6px; }
.mockup-chart__value { color: var(--c-primary); font-weight: 700; }
.mockup-chart__bar { width: 100%; height: 6px; background: var(--c-bg-alt); border-radius: var(--r-pill); overflow: hidden; }
.mockup-chart__bar span {
    display: block; height: 100%;
    background: linear-gradient(90deg, var(--c-primary), var(--c-success));
    border-radius: var(--r-pill);
    animation: loadBar 2s ease-out;
}
@keyframes loadBar { from { width: 0; } }

/* ----- Reveal (scroll animations) -------------------------------- */
.reveal {
    opacity: 0; transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal.visible, .reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-d1 { transition-delay: .1s; }
.reveal-d2 { transition-delay: .2s; }
.reveal-d3 { transition-delay: .3s; }
.reveal-d4 { transition-delay: .4s; }

/* ----- WhatsApp FAB ---------------------------------------------- */
.wa-fab {
    position: fixed; right: 18px; bottom: 18px;
    background: #25d366; color: #fff;
    width: 56px; height: 56px; border-radius: 50%;
    display: inline-flex; align-items: center; justify-content: center;
    box-shadow: 0 6px 18px rgba(37,211,102,.45);
    z-index: 900; transition: var(--t-bounce);
    text-decoration: none;
}
.wa-fab:hover { transform: scale(1.08); text-decoration: none; }
.wa-fab__label {
    position: absolute; right: 66px;
    background: var(--c-text); color: #fff;
    padding: .4rem .7rem; border-radius: var(--r-sm);
    font-size: .8rem; font-weight: 600; white-space: nowrap;
    opacity: 0; transform: translateX(8px); pointer-events: none;
    transition: var(--t-fast);
}
.wa-fab:hover .wa-fab__label { opacity: 1; transform: translateX(0); }

/* ----- Responsive ------------------------------------------------ */
@media (min-width: 768px) {
    .nav { display: flex; }
    .nav-toggle { display: none; }
    .hero-grid { grid-template-columns: 1.1fr .9fr; gap: 3.5rem; }
}