/* ============================================================
   SIEEC S.A.S. — Stylesheet v7.0  ·  "PLANO DE OBRA"
   ------------------------------------------------------------
   Dirección de arte: lámina técnica. Retículas, filetes (hairlines),
   cajetín numerado por sección, tipografía de señalización industrial
   y datos en monoespaciada. La profundidad viene de las BANDAS de tono
   (grafito <-> papel), no de sombras difusas.

   Paleta:  grafito (dominante oscuro) · papel cálido (dominante claro)
            ámbar de seguridad (acción) · azul voltio (energía; sólo en
            el visual del héroe y en marcas de dato)

   1. Reset              7. Cajetín de sección
   2. Tokens             8. Secciones
   3. Base / Tipografía  9. Componentes
   4. Utilidades        10. Accesibilidad / Motion
   5. Navbar            11. Responsive
   6. Botones
   ============================================================ */

/* ============================================================
   1. RESET
   ============================================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

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

/* ============================================================
   2. TOKENS
   ============================================================ */
:root {
    /* — Azul profundo: la banda oscura, estructural — */
    --ink-900: #041229;
    --ink-800: #071c3f;
    --ink-700: #0a2a63;
    --ink-600: #123165;

    /* — Superficies claras — */
    --paper:    #eef2f9;
    --paper-2:  #e3eaf6;
    --surface:  #ffffff;

    /* — Filetes: todo el sistema se dibuja con líneas — */
    --rule:       #dbe3f0;
    --rule-2:     #c2cee4;
    --rule-inv:   #172c50;
    --rule-inv-2: #22406e;

    /* — Texto — */
    --text:       #0b1b34;
    --text-2:     #4d5a75;
    --text-3:     #59667f;
    --text-inv:   #eaf0fa;
    --text-inv-2: #9fb0cc;

    /* — Acento de acción: el azul corporativo SIEEC.
         Sobre fondo claro manda --amp; sobre banda oscura manda --electric. — */
    --amp:      #0a369d;
    --amp-hi:   #1e50c8;
    --amp-deep: #072a7d;
    --on-amp:   #ffffff;

    /* — Eléctrico: energía / corriente. El acento sobre azul profundo. — */
    --electric:      #37a9ff;
    --electric-soft: #6ec5ff;

    /* — Estado — */
    --danger: #B3261E;
    --ok:     #17703C;
    --whatsapp:       #25d366;
    --whatsapp-hover: #1ebe57;

    /* — Aliases legado (para no romper CSS/JS previos) — */
    --brand-900: var(--ink-900);
    --brand-800: var(--ink-800);
    --brand-700: var(--ink-700);
    --brand-600: var(--amp);
    --brand-500: var(--amp-hi);
    --brand-400: #3061d1;
    --brand-300: #5b86ea;
    --brand-200: #9db9f4;
    --ink:       var(--text);
    --ink-soft:  var(--text-2);
    --muted:     var(--text-2);
    --faint:     var(--text-3);
    --line:      var(--rule);
    --line-soft: var(--rule);
    --bg:        var(--paper);
    --bg-alt:    var(--paper-2);
    --surface-2: var(--paper-2);
    --white: #fff;
    --black: #000;
    --color-cta: var(--amp);
    --cta-hover: var(--amp-hi);

    /* — Sombras: sólo dos y ambas duras. No hay difuminado decorativo. — */
    --depth:    0 24px 48px -28px rgba(9,25,54,.45);   /* sólo imágenes */
    --depth-lg: 0 40px 80px -40px rgba(9,25,54,.60);

    /* — Radios: casi rectos. Nada de píldoras genéricas. — */
    --r-xs: 1px;
    --r-sm: 2px;
    --r-md: 3px;
    --r-lg: 4px;

    /* — Retícula y ritmo — */
    --s-1: .25rem;  --s-2: .5rem;  --s-3: .75rem;  --s-4: 1rem;
    --s-5: 1.5rem;  --s-6: 2rem;   --s-7: 3rem;    --s-8: 4rem;

    --pad-tight: clamp(3rem, 6vw, 4.5rem);
    --pad:       clamp(4.5rem, 8vw, 7.5rem);
    --pad-loose: clamp(5.5rem, 10vw, 9.5rem);

    --container: 1240px;
    --container-narrow: 780px;
    --gutter: clamp(20px, 5vw, 56px);
    --nav-h: 76px;

    /* — Tipografía — */
    --font-display: 'Archivo', 'Segoe UI', sans-serif;
    --font-sans:    'Archivo', 'Segoe UI', sans-serif;
    --font-mono:    'IBM Plex Mono', ui-monospace, 'Cascadia Mono', Consolas, monospace;

    /* Escala: salto extremo del dato técnico (mono 11px) al titular (80px) */
    --t-mono:    .6875rem;
    --t-mono-lg: .8125rem;
    --t-sm:      .9375rem;
    --t-body:    1.0625rem;
    --t-lead:    clamp(1.1rem, 1.5vw, 1.3rem);
    --t-h3:      clamp(1.15rem, 1.6vw, 1.35rem);
    --t-h2:      clamp(2rem, 4.4vw, 3.4rem);
    --t-h1:      clamp(2.5rem, min(6.4vw, 7vh), 5rem);
    --t-figure:  clamp(2.6rem, 6vw, 4.6rem);

    /* — Motion — */
    --ease-out:   cubic-bezier(.22, 1, .36, 1);
    --ease-inout: cubic-bezier(.65, 0, .35, 1);
    --t-fast: .16s;
    --t-med:  .30s;
    --t-slow: .55s;
    --transition: all .3s ease;

    /* — Interacción (contrato con script.js) — */
    --mx: 50%;
    --my: 50%;
}

/* ============================================================
   3. BASE / TIPOGRAFÍA
   ============================================================ */
html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-h) + 24px);
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: var(--t-body);
    font-weight: 400;
    color: var(--text);
    background: var(--paper);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    font-feature-settings: "kern" 1, "liga" 1;
}

h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 800;
    line-height: 1.02;
    letter-spacing: -0.035em;
    color: var(--text);
    text-wrap: balance;
}
h3 { font-size: var(--t-h3); line-height: 1.22; letter-spacing: -0.02em; font-weight: 700; }
p  { text-wrap: pretty; }

strong, b { font-weight: 700; color: var(--text); }

::selection { background: var(--amp); color: var(--on-amp); }

/* Barra de scroll: un filete, no un tubo de degradado */
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: var(--paper-2); }
::-webkit-scrollbar-thumb { background: var(--rule-2); border: 3px solid var(--paper-2); }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }

/* ============================================================
   4. UTILIDADES
   ============================================================ */

/* Dato técnico / etiqueta monoespaciada: el "lenguaje de plano" */
.mono,
.titulito,
.about-subtitle,
.faq-pretitulo {
    display: inline-flex;
    align-items: flex-start;
    gap: .6em;
    font-family: var(--font-mono);
    font-size: var(--t-mono);
    font-weight: 500;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: var(--text-2);
    line-height: 1.5;
}
.titulito::before,
.about-subtitle::before,
.faq-pretitulo::before {
    content: "";
    width: 18px;
    height: 3px;
    margin-top: .42em;
    background: var(--amp);
    flex-shrink: 0;
}
/* En bandas de grafito la etiqueta se aclara */
.on-ink .titulito,
.on-ink .about-subtitle,
.on-ink .faq-pretitulo,
.hero-interno .about-subtitle,
.cta-interno .about-subtitle { color: var(--text-inv-2); }

.flecha { display: none; }   /* la flecha de texto se sustituye por SVG */

/* Icono en línea: un único set SVG, retícula 24, trazo 1.6 */
.ico {
    width: 1.25em;
    height: 1.25em;
    flex-shrink: 0;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.6;
    stroke-linecap: square;
    stroke-linejoin: miter;
}
.ico--lg { width: 32px; height: 32px; stroke-width: 1.4; }

/* Retícula de plano, reutilizable sobre grafito */
.tx-grid {
    background-image:
        linear-gradient(var(--rule-inv) 1px, transparent 1px),
        linear-gradient(90deg, var(--rule-inv) 1px, transparent 1px);
    background-size: 64px 64px;
}

.wrap { width: 100%; max-width: var(--container); margin-inline: auto; }

/* Revelado al hacer scroll.
   El estado oculto SÓLO existe si el script de cabecera pudo marcar
   <html class="js-reveal-on">. Sin JS, sin IntersectionObserver o con
   reduced-motion, el contenido nunca llega a ocultarse. */
.js-reveal-on .js-reveal { opacity: 0; transform: translateY(14px); }
.js-reveal-on .js-reveal.is-in {
    opacity: 1;
    transform: none;
    transition: opacity .7s var(--ease-out), transform .7s var(--ease-out);
    transition-delay: var(--reveal-delay, 0ms);
}

/* ============================================================
   5. SKIP LINK
   ============================================================ */
.skip-link {
    position: fixed;
    top: -120%;
    left: 12px;
    background: var(--amp);
    color: var(--on-amp);
    padding: 12px 22px;
    z-index: 10001;
    border-radius: var(--r-sm);
    font-weight: 700;
    font-size: var(--t-sm);
    box-shadow: 4px 4px 0 var(--text);
    transition: top .2s var(--ease-out);
}
.skip-link:focus { top: 14px; }

/* ============================================================
   6. NAVBAR — filete inferior, sin cristal decorativo
   ============================================================ */
header[role="banner"] {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 900;
    border-bottom: 1px solid transparent;
    transition: background-color var(--t-med) var(--ease-out),
                border-color var(--t-med) var(--ease-out);
}
header.scrolled {
    background: rgba(4,18,41,.94);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-bottom-color: var(--rule-inv);
}
/* Sobre el héroe la barra ya está en grafito: basta un velo corto */
header[role="banner"]::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 120px;
    background: linear-gradient(180deg, rgba(4,18,41,.75), transparent);
    opacity: 1;
    transition: opacity var(--t-med) ease;
    pointer-events: none;
}
header.scrolled::before { opacity: 0; }

.navbar {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s-4);
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    min-height: var(--nav-h);
    padding: 10px var(--gutter);
}

/* Marca: logotipo + palabra. Antes sólo había un círculo anónimo. */
.logo {
    display: inline-flex;
    align-items: center;
    gap: .7rem;
    color: var(--text-inv);
    transition: opacity var(--t-fast) ease;
}
.logo:hover { opacity: .78; }
.logo img {
    width: 40px;
    height: 40px;
    border-radius: var(--r-sm);
    background: var(--surface);
    padding: 3px;
}
.logo-word {
    display: flex;
    flex-direction: column;
    gap: 3px;
    line-height: 1;
}
.logo-word b {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.05rem;
    letter-spacing: .02em;
    color: inherit;
}
.logo-word span {
    font-family: var(--font-mono);
    font-size: .625rem;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--electric);
}

/* — Hamburguesa — */
.hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    min-width: 46px;
    min-height: 46px;
    margin-left: auto;
    border-radius: var(--r-sm);
    z-index: 1001;
    transition: background var(--t-fast) ease;
}
.hamburger:hover { background: rgba(255,255,255,.10); }
.ham-line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-inv);
    transform-origin: center;
    transition: transform .3s var(--ease-out), opacity .2s ease, background .3s ease;
}
.hamburger.open { background: transparent; }
.hamburger.open .ham-line { background: var(--text); }
.hamburger.open .ham-line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open .ham-line:nth-child(2) { opacity: 0; transform: scaleX(.3); }
.hamburger.open .ham-line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* — Cajón móvil — */
.nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(340px, 88vw);
    height: 100dvh;
    background: var(--surface);
    border-left: 1px solid var(--rule);
    display: flex;
    flex-direction: column;
    padding: calc(var(--nav-h) + 22px) 24px 30px;
    overflow-y: auto;
    z-index: 1000;
    counter-reset: navitem;
    transition: right .38s var(--ease-out);
}
.nav-links.open { right: 0; }
.nav-links li { border-bottom: 1px solid var(--rule); }
.nav-links a:not(.cta-navbar) {
    display: flex;
    align-items: baseline;
    gap: .9rem;
    padding: 17px 2px;
    color: var(--text);
    font-weight: 600;
    font-size: 1.05rem;
    letter-spacing: -0.01em;
    transition: color var(--t-fast) ease, padding-left var(--t-fast) ease;
}
/* Numeración de plano dentro del menú móvil */
.nav-links li:not(.nav-cta-mobile) a::before {
    counter-increment: navitem;
    content: "0" counter(navitem);
    font-family: var(--font-mono);
    font-size: var(--t-mono);
    letter-spacing: .1em;
    color: var(--text-3);
    transition: color var(--t-fast) ease;
}
.nav-links a:not(.cta-navbar):hover { color: var(--electric); padding-left: 8px; }
.nav-links a:not(.cta-navbar):hover::before { color: var(--amp); }

/* Página actual dentro del cajón móvil. Va en su propio media query
   para no competir en especificidad con la regla de escritorio. */
@media (max-width: 1023px) {
    .nav-links a.is-active:not(.cta-navbar) { color: var(--amp); font-weight: 700; }
    .nav-links a.is-active:not(.cta-navbar)::before { color: var(--amp); }
}

.nav-cta-mobile { margin-top: var(--s-6); border-bottom: none !important; }
.nav-links .nav-cta-mobile .cta-navbar { display: flex; width: 100%; }

.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(4,18,41,.6);
    z-index: 999;
}
.nav-overlay.open { display: block; animation: fade-in-overlay .25s ease; }
@keyframes fade-in-overlay { from { opacity: 0; } to { opacity: 1; } }

/* ============================================================
   6b. BOTONES — tres rangos de jerarquía, no un único pill azul
       PRIMARIO    ámbar macizo + sombra dura (una vez por pantalla)
       SECUNDARIO  contorno
       TERCIARIO   enlace de fila
   ============================================================ */
.cta-hero,
.cta-form,
.cta-servicios,
.btn-modal,
.cta-interno a,
.btn-ver-mas-info,
.cta-navbar {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .6em;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: var(--t-sm);
    letter-spacing: -0.01em;
    color: var(--on-amp);
    background: var(--amp);
    border: 1px solid var(--amp-deep);
    border-radius: var(--r-sm);
    cursor: pointer;
    min-height: 48px;
    padding: 13px 26px;
    box-shadow: 4px 4px 0 var(--text);
    transition: transform var(--t-fast) var(--ease-out),
                box-shadow var(--t-fast) var(--ease-out),
                background var(--t-fast) ease;
}
.cta-hero:hover, .cta-form:hover, .cta-servicios:hover, .btn-modal:hover,
.cta-interno a:hover, .btn-ver-mas-info:hover, .cta-navbar:hover {
    background: var(--amp-hi);
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--text);
}
/* Al pulsar, el botón "entra" en su propia sombra */
.cta-hero:active, .cta-form:active, .cta-servicios:active, .btn-modal:active,
.cta-interno a:active, .btn-ver-mas-info:active, .cta-navbar:active {
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0 var(--text);
}
.cta-navbar {
    min-height: 42px;
    padding: 10px 18px;
    font-size: .875rem;
    box-shadow: 3px 3px 0 var(--text);
}
.cta-navbar-desktop { display: none; }
.cta-hero { padding: 17px 32px; font-size: 1.0625rem; min-height: 56px; }
.cta-servicios { min-height: 50px; padding: 14px 26px; }

/* Sobre la banda de azul profundo el relieve se dibuja en azul eléctrico:
   --amp-deep quedaría invisible contra el fondo. */
.hero-actions .cta-hero,
.cta-interno a,
.contacto .cta-form {
    border-color: var(--electric);
    box-shadow: 4px 4px 0 var(--electric);
}
.hero-actions .cta-hero:hover, .cta-interno a:hover, .contacto .cta-form:hover { box-shadow: 6px 6px 0 var(--electric); }
.hero-actions .cta-hero:active, .cta-interno a:active, .contacto .cta-form:active { box-shadow: 1px 1px 0 var(--electric); }

/* SECUNDARIO — contorno */
.btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .6em;
    min-height: 48px;
    padding: 13px 24px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: var(--t-sm);
    color: var(--text-inv);
    background: transparent;
    border: 1px solid var(--rule-inv-2);
    border-radius: var(--r-sm);
    cursor: pointer;
    transition: border-color var(--t-fast) ease, background var(--t-fast) ease, color var(--t-fast) ease;
}
.btn-ghost:hover { border-color: var(--text-inv); background: rgba(255,255,255,.07); }
.btn-ghost--dark { color: var(--text); border-color: var(--rule-2); }
.btn-ghost--dark:hover { border-color: var(--text); background: rgba(11,27,52,.05); }

/* Variante clara del botón "conoce…" de las secciones sobre papel */
.btn-ver-mas-info { margin-top: var(--s-6); }
.btn-ver-mas-info--light {
    background: transparent;
    color: var(--text);
    border-color: var(--rule-2);
    box-shadow: none;
}
.btn-ver-mas-info--light:hover {
    background: var(--amp);
    color: var(--on-amp);
    border-color: var(--amp-deep);
    box-shadow: 4px 4px 0 var(--text);
}

/* TERCIARIO — enlace de fila */
.btn-ver {
    display: inline-flex;
    align-items: center;
    gap: .5em;
    padding: 10px 0;
    background: none;
    border: none;
    font-family: var(--font-mono);
    font-size: var(--t-mono-lg);
    font-weight: 500;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--text);
    cursor: pointer;
    min-height: 44px;
    white-space: nowrap;
    transition: color var(--t-fast) ease;
}
.btn-ver .ico { transition: transform var(--t-fast) var(--ease-out); }
.btn-ver:hover { color: var(--amp-deep); }
.btn-ver:hover .ico { transform: translateX(4px); }


/* Flechas que se desplazan dentro de cualquier CTA */
.cta-hero .ico, .cta-servicios .ico, .btn-ver-mas-info .ico, .cta-interno a .ico { transition: transform var(--t-fast) var(--ease-out); }
.cta-hero:hover .ico, .cta-servicios:hover .ico, .btn-ver-mas-info:hover .ico, .cta-interno a:hover .ico { transform: translateX(4px); }

/* ============================================================
   7. CAJETÍN DE SECCIÓN — el motivo que unifica toda la web
      Nº · rótulo · filete · metadato (distinto en cada sección)
   ============================================================ */
.sec-mark {
    display: grid;
    grid-template-columns: auto auto 1fr auto;
    align-items: center;
    gap: var(--s-4);
    padding-bottom: 14px;
    margin-bottom: clamp(2.2rem, 4vw, 3.5rem);
    border-bottom: 1px solid var(--rule);
    font-family: var(--font-mono);
    font-size: var(--t-mono);
    font-weight: 500;
    letter-spacing: .2em;
    text-transform: uppercase;
    line-height: 1;
    color: var(--text-2);
}
.sec-mark-num {
    color: var(--on-amp);
    background: var(--amp);
    padding: 5px 8px 4px;
    border-radius: var(--r-xs);
    font-weight: 600;
    letter-spacing: .08em;
}
.sec-mark-rule { height: 1px; background: var(--rule); }
.sec-mark-meta { color: var(--text-3); letter-spacing: .14em; }

.on-ink .sec-mark { border-bottom-color: var(--rule-inv); color: var(--text-inv-2); }
.on-ink .sec-mark-rule { background: var(--rule-inv); }
.on-ink .sec-mark-meta { color: var(--text-inv-2); opacity: .7; }

@media (max-width: 719px) {
    .sec-mark { grid-template-columns: auto 1fr; gap: .75rem; }
    .sec-mark-rule, .sec-mark-meta { display: none; }
}

/* Titular de sección + entradilla */
.sec-head h2 { font-size: var(--t-h2); max-width: 20ch; }
.sec-lead {
    color: var(--text-2);
    font-size: var(--t-lead);
    line-height: 1.6;
    max-width: 52ch;
}
.on-ink .sec-lead { color: var(--text-inv-2); }
.on-ink h2, .on-ink h3 { color: var(--text-inv); }

/* ============================================================
   8. HERO — banda de grafito. Texto a la izquierda y ficha de
      credenciales anclada abajo, a todo el ancho.
   ============================================================ */
.hero-section {
    position: relative;
    min-height: 100svh;
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: calc(var(--nav-h) + clamp(1.5rem, 6.5vh, 4rem)) var(--gutter) 0;
    overflow: hidden;
    isolation: isolate;
    color: var(--text-inv);
    --hx: 68%;
    --hy: 30%;
    background:
        radial-gradient(62% 58% at 84% 14%, rgba(58,167,255,.15), transparent 58%),
        radial-gradient(80% 70% at 6% 30%, rgba(10,54,157,.42), transparent 62%),
        linear-gradient(168deg, var(--ink-900) 0%, #071c3f 52%, var(--ink-900) 100%);
}
/* Velo direccional: garantiza el contraste del titular sobre el canvas */
.hero-section::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 3;
    pointer-events: none;
    background:
        linear-gradient(90deg, rgba(4,18,41,.78) 0%, rgba(4,18,41,.38) 46%, transparent 72%),
        linear-gradient(0deg, rgba(4,18,41,.90) 0%, transparent 38%);
}
.hero-decor {
    position: absolute;
    inset: -6%;
    z-index: 2;
    opacity: .5;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(120,170,255,.07) 1px, transparent 1px),
        linear-gradient(90deg, rgba(120,170,255,.07) 1px, transparent 1px);
    background-size: 64px 64px;
    -webkit-mask-image: radial-gradient(72% 68% at var(--hx) var(--hy), #000, transparent 76%);
    mask-image: radial-gradient(72% 68% at var(--hx) var(--hy), #000, transparent 76%);
    transition: transform .5s var(--ease-out);
    will-change: transform;
}
.hero-section::before {
    content: "";
    position: absolute;
    inset: -10%;
    z-index: 1;
    pointer-events: none;
    mix-blend-mode: screen;
    background: radial-gradient(34% 38% at var(--hx) var(--hy),
                rgba(58,167,255,.17), rgba(10,54,157,.08) 45%, transparent 72%);
    transition: background .3s var(--ease-out);
}
.hero-viz {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    display: block;
    pointer-events: none;
}

.hero-text {
    position: relative;
    z-index: 4;
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-bottom: clamp(2rem, 5vh, 4rem);
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
}
.hero-text > * { max-width: 100%; }

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: .7em;
    margin-bottom: clamp(.75rem, 2.5vh, 1.5rem);
    padding-left: 14px;
    border-left: 3px solid var(--electric);
    font-family: var(--font-mono);
    font-size: clamp(.625rem, 1.5vw, .75rem);
    font-weight: 500;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: var(--electric);
    line-height: 1.5;
}

.hero-text h1 {
    font-size: var(--t-h1);
    font-weight: 800;
    letter-spacing: -0.045em;
    line-height: .96;
    color: var(--text-inv);
    max-width: 15ch;
}
.hero-text h1 em { font-style: normal; color: var(--electric); }

.hero-text > p:not([class]) {
    margin-top: clamp(1rem, 2.5vh, 1.5rem);
    font-size: var(--t-lead);
    line-height: 1.62;
    color: var(--text-inv-2);
    max-width: 46ch;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--s-3);
    margin-top: clamp(1.5rem, 4vh, 3rem);
}
.hero-note {
    margin-top: var(--s-4);
    font-family: var(--font-mono);
    font-size: var(--t-mono);
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--text-inv-2);
}

/* Ficha de credenciales: 4 datos con filetes, a todo el ancho del héroe */
.hero-specs {
    position: relative;
    z-index: 4;
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    border-top: 1px solid var(--rule-inv);
    padding-bottom: clamp(1.5rem, 4vh, 2.5rem);
}
.hero-spec {
    padding: clamp(1rem, 2.5vh, 1.5rem) var(--s-4) clamp(.75rem, 2vh, 1rem) 0;
    border-right: 1px solid var(--rule-inv);
}
.hero-spec:last-child { border-right: none; }
.hero-spec dt {
    margin-bottom: 8px;
    font-family: var(--font-mono);
    font-size: var(--t-mono);
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--text-inv-2);
    opacity: .75;
}
.hero-spec dd {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(.95rem, 1.5vw, 1.15rem);
    letter-spacing: -0.02em;
    color: var(--text-inv);
    line-height: 1.2;
}
.hero-spec dd b { color: var(--electric); font-weight: 800; }

/* ── Entrada del héroe: la ÚNICA animación de carga de la web ── */
.hero-intro .hero-text,
.hero-intro .hero-specs,
.hero-intro header[role="banner"] { opacity: 0; pointer-events: none; }
.hero-intro .hero-text { transform: translateY(16px); }

.hero-intro.hero-ready .hero-text,
.hero-intro.hero-ready .hero-specs,
.hero-intro.hero-ready header[role="banner"] {
    opacity: 1;
    pointer-events: auto;
    transform: none;
}
.hero-intro.hero-ready .hero-text  { transition: opacity .9s var(--ease-out), transform 1s var(--ease-out); }
.hero-intro.hero-ready .hero-specs { transition: opacity .9s var(--ease-out) .18s; }
.hero-intro.hero-ready header[role="banner"] {
    transition: opacity .8s ease .1s,
                background-color var(--t-med) var(--ease-out),
                border-color var(--t-med) var(--ease-out);
}

/* ============================================================
   8. QUIÉNES SOMOS — composición asimétrica: lámina grande a un
      lado, texto en columna corta al otro. Sin tarjetas.
   ============================================================ */
.solucion-section {
    position: relative;
    padding: var(--pad) var(--gutter);
    background: var(--paper);
    border-bottom: 1px solid var(--rule);
}
.solucion-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(2.5rem, 5vw, 4.5rem);
    max-width: var(--container);
    margin: 0 auto;
    align-items: start;
}
.solucion-text { display: flex; flex-direction: column; }
.solucion-text h2 { font-size: var(--t-h2); margin-bottom: var(--s-5); max-width: 16ch; }
.solucion-text > p { color: var(--text-2); max-width: 54ch; }

/* Dos fichas en filete: sin tarjeta, sin sombra, sin elevación */
.solucion-card {
    display: grid;
    grid-template-columns: 1fr;
    margin-top: var(--s-6);
    border-top: 1px solid var(--rule);
}
.card {
    position: relative;
    display: grid;
    grid-template-columns: auto 1fr;
    column-gap: var(--s-4);
    row-gap: 0;
    align-items: start;
    padding: var(--s-5) 0;
    border-bottom: 1px solid var(--rule);
    transition: background var(--t-med) ease;
}
.card:hover { background: var(--surface); }
.emoji {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border: 1px solid var(--rule-2);
    border-radius: var(--r-sm);
    background: var(--surface);
    color: var(--text);
    transition: border-color var(--t-med) ease, background var(--t-med) ease;
}
.emoji .ico { width: 22px; height: 22px; }
.card:hover .emoji { border-color: var(--amp-deep); background: var(--amp); color: var(--on-amp); }
.card-title {
    grid-column: 2;
    margin-bottom: 5px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.02rem;
    letter-spacing: -0.015em;
    color: var(--text);
}
.card p { grid-column: 2; color: var(--text-2); font-size: var(--t-sm); line-height: 1.6; }

/* Lámina: marco de filete + cartela monoespaciada */
.solucion-img { position: relative; }
.figure-frame {
    position: relative;
    padding: 10px;
    background: var(--surface);
    border: 1px solid var(--rule-2);
}
.figure-frame img { width: 100%; display: block; filter: saturate(.96) contrast(1.03); }
.figure-cap {
    display: flex;
    justify-content: space-between;
    gap: var(--s-4);
    margin-top: 10px;
    padding-top: 9px;
    border-top: 1px solid var(--rule);
    font-family: var(--font-mono);
    font-size: var(--t-mono);
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--text-3);
    line-height: 1.4;
}
.figure-cap b { color: var(--text-2); font-weight: 500; }

/* ============================================================
   8. SERVICIOS — índice técnico. Filas numeradas, no 9 tarjetas.
   ============================================================ */
.servicios-section {
    padding: var(--pad) var(--gutter);
    background: var(--paper-2);
    border-bottom: 1px solid var(--rule);
}
.servicios-intro {
    display: grid;
    gap: var(--s-5);
    margin-bottom: clamp(2.5rem, 5vw, 3.5rem);
}
.servicios-intro h2 { font-size: var(--t-h2); max-width: 18ch; }
.servicios-intro p { color: var(--text-2); font-size: var(--t-lead); line-height: 1.6; max-width: 52ch; }

/* ── CARRIL HORIZONTAL (servicios y obras) ──────────────────────────────────────
   El scroll táctil es nativo; en escritorio lo conduce el arrastre
   del cursor (script.js). Sin flechas: la barra de avance y el
   desvanecido del borde indican que hay más tarjetas. */
.carril {
    position: relative;
    --fade-ini: clamp(16px, 4vw, 56px);
    --fade-fin: clamp(26px, 5vw, 72px);
}

.carril-pista {
    display: flex;
    gap: clamp(14px, 1.6vw, 20px);
    max-width: var(--container);
    margin-inline: auto;
    padding: 4px 0 var(--s-5);
    overflow-x: auto;
    overflow-y: hidden;
    overscroll-behavior-x: contain;
    scroll-snap-type: x proximity;
    -webkit-overflow-scrolling: touch;
    cursor: grab;
    /* Al arrastrar en escritorio el texto se seleccionaba sin querer */
    -webkit-user-select: none;
    user-select: none;
    /* La barra nativa se oculta: su función la cumple .carril-barra */
    scrollbar-width: none;
    -ms-overflow-style: none;
    /* Se desvanece el borde por el que aún queda contenido */
    -webkit-mask-image: linear-gradient(90deg, #000 0 calc(100% - var(--fade-fin)), transparent);
    mask-image: linear-gradient(90deg, #000 0 calc(100% - var(--fade-fin)), transparent);
    transition: -webkit-mask-image .3s ease, mask-image .3s ease;
    counter-reset: svc;
}
.carril-pista::-webkit-scrollbar { display: none; }
.carril-pista.is-dragging { cursor: grabbing; scroll-snap-type: none; scroll-behavior: auto; }
.carril-pista.at-start.at-end,
.carril-pista.at-end { -webkit-mask-image: none; mask-image: none; }
.carril-pista:not(.at-start):not(.at-end) {
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 var(--fade-ini) calc(100% - var(--fade-fin)), transparent);
    mask-image: linear-gradient(90deg, transparent, #000 var(--fade-ini) calc(100% - var(--fade-fin)), transparent);
}
.carril-pista:focus-visible { outline: 3px solid var(--amp); outline-offset: 4px; }
/* Cuando todo cabe en pantalla, la barra y la pista sobran */
.carril-pista.at-start.at-end ~ .carril-barra,
.carril-pista.at-start.at-end ~ .carril-hint { display: none; }

/* ── Tarjeta de servicio ──────────────────────────────────── */
.servicio {
    position: relative;
    flex: 0 0 clamp(248px, 76vw, 330px);
    display: flex;
    flex-direction: column;
    padding: var(--s-5);
    background: var(--surface);
    border: 1px solid var(--rule-2);
    border-radius: var(--r-sm);
    scroll-snap-align: start;
    isolation: isolate;
    transition: border-color var(--t-med) ease, box-shadow var(--t-med) var(--ease-out), transform var(--t-med) var(--ease-out);
}
/* Lavado que sigue al cursor (contrato --mx/--my con script.js) */
.servicio::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background: radial-gradient(300px circle at var(--mx) var(--my), rgba(10,54,157,.09), transparent 62%);
    opacity: 0;
    transition: opacity var(--t-med) ease;
}
.servicio:hover::before { opacity: 1; }
.servicio:hover {
    border-color: var(--text);
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--amp);
}
/* Mientras se arrastra el carril no hay hover que valga */
.carril-pista.is-dragging .servicio:hover { transform: none; box-shadow: none; border-color: var(--rule-2); }

.servicio-cab {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s-4);
    padding-bottom: var(--s-4);
    margin-bottom: var(--s-4);
    border-bottom: 1px solid var(--rule);
}
.servicio-num::before {
    counter-increment: svc;
    content: counter(svc, decimal-leading-zero);
    font-family: var(--font-mono);
    font-size: var(--t-mono);
    font-weight: 500;
    letter-spacing: .12em;
    color: var(--text-3);
    transition: color var(--t-med) ease;
}
.servicio:hover .servicio-num::before { color: var(--amp); }
.servicio-ico {
    display: grid;
    place-items: center;
    width: 46px;
    height: 46px;
    background: var(--paper);
    border: 1px solid var(--rule-2);
    border-radius: var(--r-sm);
    color: var(--amp);
    transition: background var(--t-med) ease, border-color var(--t-med) ease, color var(--t-med) ease;
}
.servicio-ico .ico { width: 24px; height: 24px; }
.servicio:hover .servicio-ico { background: var(--amp); border-color: var(--amp); color: var(--on-amp); }

.servicio h3 {
    font-size: 1.1rem;
    line-height: 1.25;
    margin-bottom: var(--s-3);
    color: var(--text);
}
.servicio p {
    color: var(--text-2);
    font-size: var(--t-sm);
    line-height: 1.6;
    margin-bottom: var(--s-5);
}
/* El botón queda anclado abajo para que todas las tarjetas midan igual */
.servicio .btn-ver {
    margin-top: auto;
    padding-top: var(--s-4);
    border-top: 1px solid var(--rule);
    width: 100%;
    justify-content: space-between;
    cursor: pointer;
}

/* ── Barra de avance y pista (sustituyen a las flechas) ────── */
.carril-barra {
    max-width: var(--container);
    margin-inline: auto;
    height: 2px;
    background: var(--rule-2);
    overflow: hidden;
}
.carril-barra span {
    display: block;
    height: 100%;
    width: 22%;
    background: var(--amp);
    transform-origin: left;
    transition: width .15s linear, transform .15s linear;
}
.carril-hint {
    max-width: var(--container);
    margin: var(--s-3) auto 0;
    font-family: var(--font-mono);
    font-size: var(--t-mono);
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--text-3);
}

@media (min-width: 700px) { .servicio { flex-basis: 322px; } }
@media (prefers-reduced-motion: reduce) {
    .carril-pista { scroll-behavior: auto; }
}

.servicios-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--s-4);
    margin-top: var(--s-7);
    max-width: var(--container);
    margin-inline: auto;
}

/* ============================================================
   9. MODALES — hoja de especificación
   ============================================================ */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(4,18,41,.78);
    justify-content: center;
    align-items: center;
    z-index: 1200;
    padding: 20px;
}
.modal.active { display: flex; }
.modal-content {
    width: 100%;
    max-width: 900px;
    max-height: 90vh;
    overflow: hidden auto;
    background: var(--surface);
    border: 1px solid var(--text);
    border-radius: var(--r-sm);
    box-shadow: var(--depth-lg);
    animation: modalIn .32s var(--ease-out);
}
.modal-flex { display: flex; }
.modal-img { width: 42%; flex-shrink: 0; position: relative; background: var(--ink-900); }
.modal-img img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.95) contrast(1.04); }
.modal-text { width: 58%; padding: clamp(24px, 3vw, 40px); position: relative; border-left: 1px solid var(--rule); }
.modal-text h3 {
    margin-bottom: 14px;
    padding-right: 44px;
    font-size: clamp(1.25rem, 2.2vw, 1.6rem);
    line-height: 1.12;
}
.modal-text > p { margin-bottom: var(--s-4); color: var(--text-2); font-size: var(--t-sm); }
.modal-text ul { margin: 0 0 var(--s-5); display: grid; border-top: 1px solid var(--rule); }
.modal-text ul li {
    position: relative;
    padding: 11px 0 11px 24px;
    border-bottom: 1px solid var(--rule);
    color: var(--text);
    font-size: var(--t-sm);
    line-height: 1.4;
}
.modal-text ul li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 1.25em;
    width: 10px;
    height: 2px;
    background: var(--amp);
}
.close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    font-size: 1.35rem;
    line-height: 1;
    background: transparent;
    border: 1px solid var(--rule-2);
    border-radius: var(--r-sm);
    color: var(--text);
    cursor: pointer;
    transition: background var(--t-fast) ease, border-color var(--t-fast) ease;
}
.close:hover { background: var(--amp); color: var(--on-amp); border-color: var(--amp-deep); }
.btn-modal { padding: 12px 22px; min-height: 46px; }
@keyframes modalIn {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: none; }
}
@media (max-width: 768px) {
    .modal-flex { flex-direction: column; }
    .modal-img, .modal-text { width: 100%; }
    .modal-img { height: 200px; }
    .modal-text { border-left: none; border-top: 1px solid var(--rule); }
}

/* ============================================================
   8. PERFIL DEL INGENIERO — la firma que respalda la obra
   ============================================================ */
.about-engineer {
    padding: var(--pad) var(--gutter);
    background: var(--paper);
    border-bottom: 1px solid var(--rule);
}
.about-container {
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(2.5rem, 5vw, 4.5rem);
    align-items: start;
}
.about-image { position: relative; }
.image-placeholder {
    position: relative;
    width: 100%;
    aspect-ratio: 4 / 5;
    overflow: hidden;
    border: 1px solid var(--rule-2);
}
.image-placeholder img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.95) contrast(1.04); }
/* Marcas de encuadre en esquinas: lenguaje de lámina, no blob decorativo */
.about-image::before,
.about-image::after {
    content: "";
    position: absolute;
    width: 26px;
    height: 26px;
    pointer-events: none;
}
.about-image::before { top: -7px; left: -7px; border-top: 2px solid var(--amp); border-left: 2px solid var(--amp); }
.about-image::after  { bottom: -7px; right: -7px; border-bottom: 2px solid var(--amp); border-right: 2px solid var(--amp); }

.about-title { font-size: var(--t-h2); margin: var(--s-4) 0 var(--s-5); max-width: 17ch; }
.about-text { color: var(--text-2); margin-bottom: var(--s-4); max-width: 58ch; }

/* Credenciales como renglones de acta, no como píldoras flotantes */
.about-badges { margin-top: var(--s-5); border-top: 1px solid var(--rule); }
.about-badge {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 13px 0;
    border-bottom: 1px solid var(--rule);
    font-family: var(--font-mono);
    font-size: var(--t-mono-lg);
    font-weight: 500;
    letter-spacing: .04em;
    text-transform: uppercase;
    color: var(--text);
}
.badge-icon {
    display: grid;
    place-items: center;
    width: 22px;
    height: 22px;
    flex-shrink: 0;
    background: var(--amp);
    border-radius: var(--r-xs);
    color: var(--on-amp);
}
.badge-icon .ico { width: 13px; height: 13px; stroke-width: 2.4; }

/* ============================================================
   8. COTIZAR — banda de grafito. Argumento a la izquierda,
      formulario como hoja de solicitud a la derecha.
   ============================================================ */
.contacto {
    padding: var(--pad) var(--gutter);
    background: var(--ink-800);
    color: var(--text-inv);
    border-top: 1px solid var(--rule-inv);
}
.contacto-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(2.5rem, 5vw, 4.5rem);
    max-width: var(--container);
    margin-inline: auto;
    align-items: start;
}
.contacto-pitch h2 { color: var(--text-inv); font-size: var(--t-h2); max-width: 15ch; margin-bottom: var(--s-5); }
.contacto-pitch > p { color: var(--text-inv-2); max-width: 46ch; }
.contacto-list { margin-top: var(--s-6); border-top: 1px solid var(--rule-inv); }
.contacto-list li {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 15px 0;
    border-bottom: 1px solid var(--rule-inv);
    color: var(--text-inv);
    font-size: var(--t-sm);
}
.contacto-list .ico { width: 20px; height: 20px; color: var(--electric); }
.contacto-list a { transition: color var(--t-fast) ease; }
.contacto-list a:hover { color: var(--electric); }

.form-container {
    position: relative;
    width: 100%;
    padding: clamp(26px, 3.5vw, 40px);
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--text);
    border-radius: var(--r-sm);
    box-shadow: 8px 8px 0 var(--electric);
}
.form-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: var(--s-4);
    padding-bottom: 12px;
    margin-bottom: var(--s-5);
    border-bottom: 1px solid var(--rule);
    font-family: var(--font-mono);
    font-size: var(--t-mono);
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--text-3);
}
.form-container h2 { font-size: clamp(1.2rem, 2vw, 1.5rem); margin-bottom: 6px; color: var(--text); }
.form-container > p { margin-bottom: var(--s-5); font-size: var(--t-sm); color: var(--text-2); }

.form-group {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 7px;
    margin-bottom: var(--s-4);
    text-align: left;
}
label {
    font-family: var(--font-mono);
    font-size: var(--t-mono);
    font-weight: 500;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--text-2);
    transition: color var(--t-fast) ease;
}
input, select, textarea {
    width: 100%;
    padding: 13px 14px;
    font-family: inherit;
    font-size: var(--t-sm);
    color: var(--text);
    background: var(--paper);
    border: 1px solid var(--rule-2);
    border-radius: var(--r-sm);
    outline: none;
    transition: border-color var(--t-fast) ease, box-shadow var(--t-fast) ease, background var(--t-fast) ease;
}
input::placeholder, textarea::placeholder { color: var(--text-3); }
input:focus, select:focus, textarea:focus {
    border-color: var(--text);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(55,169,255,.45);
}
textarea { resize: vertical; min-height: 108px; }
select { cursor: pointer; }

.cta-form { width: 100%; margin-top: var(--s-2); padding: 16px; min-height: 54px; }
.cta-form:disabled { opacity: .65; cursor: not-allowed; transform: none; box-shadow: 1px 1px 0 var(--electric); }

.form-group.focused label { color: var(--text); }
.form-group.error label { color: var(--danger); }
.form-group.error input,
.form-group.error select,
.form-group.error textarea {
    border-color: var(--danger);
    background: #FDF3F2;
    box-shadow: 0 0 0 3px rgba(179,38,30,.14);
}
.field-error {
    display: block;
    min-height: 1em;
    font-family: var(--font-mono);
    font-size: .6875rem;
    font-weight: 500;
    color: var(--danger);
}
.form-group.valid input,
.form-group.valid select,
.form-group.valid textarea { border-color: var(--ok); }
.form-send-error {
    margin-top: 12px;
    font-family: var(--font-mono);
    font-size: .75rem;
    font-weight: 500;
    color: var(--danger);
    text-align: center;
}
.form-legal {
    margin-top: 14px;
    font-family: var(--font-mono);
    font-size: .6875rem;
    letter-spacing: .08em;
    line-height: 1.6;
    text-transform: uppercase;
    color: var(--text-3);
    text-align: center;
}

/* ============================================================
   9. TOAST
   ============================================================ */
.toast {
    visibility: hidden;
    position: fixed;
    left: 50%;
    bottom: 34px;
    transform: translateX(-50%);
    min-width: 290px;
    padding: 15px 22px;
    background: var(--text);
    color: var(--text-inv);
    border-radius: var(--r-sm);
    box-shadow: 6px 6px 0 var(--electric);
    z-index: 1300;
}
.toast-content { display: flex; align-items: center; justify-content: center; gap: 11px; font-size: var(--t-sm); }
.toast-content .ico { width: 20px; height: 20px; color: var(--electric); }
.toast.show { visibility: visible; animation: fadeInOut 4s; }
@keyframes fadeInOut {
    0%   { bottom: 6px;  opacity: 0; }
    10%  { bottom: 34px; opacity: 1; }
    90%  { bottom: 34px; opacity: 1; }
    100% { bottom: 6px;  opacity: 0; }
}

/* ============================================================
   8. FAQ — renglones de filete, numerados
   ============================================================ */
.faq-section { padding: var(--pad) var(--gutter); background: var(--paper); }
.faq-container { max-width: var(--container); margin: 0 auto; }
.faq-head { display: grid; gap: var(--s-4); margin-bottom: clamp(2rem, 4vw, 3rem); }
.faq-container h2 { font-size: var(--t-h2); max-width: 18ch; }
.faq-subtitulo { color: var(--text-2); max-width: 50ch; }
.faq-list { display: grid; border-top: 1px solid var(--rule-2); counter-reset: faq; }
.faq-item { border-bottom: 1px solid var(--rule-2); transition: background var(--t-med) ease; }
.faq-item:hover { background: var(--surface); }
.faq-question {
    display: grid;
    grid-template-columns: 2.5rem 1fr auto;
    align-items: start;
    gap: var(--s-4);
    width: 100%;
    padding: var(--s-5) 0;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    min-height: 44px;
}
.faq-question::before {
    counter-increment: faq;
    content: counter(faq, decimal-leading-zero);
    padding-top: .5em;
    font-family: var(--font-mono);
    font-size: var(--t-mono);
    letter-spacing: .1em;
    color: var(--text-3);
}
.faq-question > span:first-of-type {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1rem, 1.6vw, 1.15rem);
    letter-spacing: -0.02em;
    line-height: 1.35;
    color: var(--text);
    transition: color var(--t-fast) ease;
}
.faq-question:hover > span:first-of-type { color: var(--amp-deep); }
.faq-icon {
    display: grid;
    place-items: center;
    width: 30px;
    height: 30px;
    flex-shrink: 0;
    font-family: var(--font-mono);
    font-size: 1.15rem;
    font-weight: 400;
    line-height: 1;
    color: var(--text);
    border: 1px solid var(--rule-2);
    border-radius: var(--r-sm);
    transition: transform var(--t-med) var(--ease-out), background var(--t-med) ease, border-color var(--t-med) ease;
}
.faq-question[aria-expanded="true"] .faq-icon { transform: rotate(135deg); background: var(--amp); color: var(--on-amp); border-color: var(--amp-deep); }
.faq-answer { padding: 0 0 var(--s-5) 3.5rem; }
.faq-answer p { color: var(--text-2); font-size: var(--t-sm); line-height: 1.75; max-width: 68ch; }

/* ============================================================
   8. FOOTER — cajetín de lámina
   ============================================================ */
.main-footer {
    position: relative;
    padding: var(--pad-tight) var(--gutter) 24px;
    background: var(--ink-900);
    color: var(--text-inv);
    border-top: 1px solid var(--rule-inv);
    isolation: isolate;
}
.footer-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--s-7);
    max-width: var(--container);
    margin: 0 auto;
}
.footer-logo {
    margin-bottom: 12px;
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text-inv);
}
.footer-logo span { color: var(--text-inv); }
.footer-info p { color: var(--text-inv-2); line-height: 1.7; font-size: var(--t-sm); }
.footer-info p em { color: var(--electric); font-style: normal; font-weight: 600; }
.footer-legal {
    margin-top: var(--s-4);
    padding-top: var(--s-4);
    border-top: 1px solid var(--rule-inv);
    font-family: var(--font-mono) !important;
    font-size: .6875rem !important;
    letter-spacing: .06em;
    line-height: 1.9 !important;
    color: var(--text-inv-2) !important;
    opacity: .75;
}
.footer-contact h3, .footer-social h3, .footer-nav h3, .footer-servicios h3 {
    margin-bottom: var(--s-4);
    padding-bottom: 10px;
    border-bottom: 1px solid var(--rule-inv);
    font-family: var(--font-mono);
    font-size: var(--t-mono);
    font-weight: 500;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: var(--text-inv-2);
}
/* Listas de navegación del pie: mismo renglón con filete que el resto
   del sistema. Los servicios llevan su índice 01–09, igual que en el
   catálogo de la portada y en las fichas. */
.footer-nav ul,
.footer-servicios ul { display: grid; }

.footer-nav a,
.footer-servicios a {
    display: flex;
    align-items: baseline;
    gap: .75rem;
    padding: 10px 0;
    color: var(--text-inv-2);
    font-size: var(--t-sm);
    line-height: 1.4;
    transition: color var(--t-fast) ease, padding-left var(--t-fast) var(--ease-out);
}
.footer-nav a:hover,
.footer-servicios a:hover { color: var(--electric); padding-left: 6px; }

.footer-servicios a span {
    flex-shrink: 0;
    font-family: var(--font-mono);
    font-size: var(--t-mono);
    letter-spacing: .1em;
    color: var(--text-inv-2);
    opacity: .55;
    transition: color var(--t-fast) ease, opacity var(--t-fast) ease;
}
.footer-servicios a:hover span { color: var(--electric); opacity: 1; }

/* La página que se está viendo se marca y deja de comportarse como enlace */
.footer-nav a[aria-current="page"],
.footer-servicios a[aria-current="page"] {
    color: var(--text-inv);
    font-weight: 600;
    cursor: default;
    pointer-events: none;
}
.footer-servicios a[aria-current="page"] span { color: var(--electric); opacity: 1; }

.contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    /* Las direcciones de correo no llevan espacios: sin esto, la más larga
       desborda la columna del pie en los anchos ajustados. */
    overflow-wrap: anywhere;
    min-height: 44px;
    color: var(--text-inv);
    font-size: var(--t-sm);
    transition: color var(--t-fast) ease, transform var(--t-fast) ease;
}
.contact-item:hover { color: var(--electric); transform: translateX(3px); }
.contact-item svg { width: 18px; height: 18px; flex-shrink: 0; color: var(--electric); }
.social-icons { display: flex; gap: 10px; }
.social-icons a {
    display: grid;
    place-items: center;
    min-width: 46px;
    min-height: 46px;
    color: var(--text-inv);
    border: 1px solid var(--rule-inv-2);
    border-radius: var(--r-sm);
    transition: background var(--t-fast) ease, color var(--t-fast) ease, border-color var(--t-fast) ease;
}
.social-icons a:hover { background: var(--electric); color: var(--ink-900); border-color: var(--electric); }
.footer-bottom {
    max-width: var(--container);
    margin-top: var(--s-7);
    margin-inline: auto;
    padding-top: 20px;
    border-top: 1px solid var(--rule-inv);
    font-family: var(--font-mono);
    font-size: .6875rem;
    letter-spacing: .08em;
    line-height: 1.9;
    text-transform: uppercase;
    color: var(--text-inv-2);
    opacity: .8;
}

/* Enlace legal del pie. Hereda la mono en versalitas de
   .footer-bottom; sólo se le da color propio y un subrayado que
   aparece al pasar, para que no compita con el aviso de copyright. */
.footer-bottom__legal { margin-top: 10px; }
.footer-bottom__legal a {
    color: var(--text-inv-2);
    text-decoration: underline;
    text-underline-offset: .25em;
    text-decoration-color: transparent;
    transition: color var(--t-fast) ease, text-decoration-color var(--t-fast) ease;
}
.footer-bottom__legal a:hover,
.footer-bottom__legal a:focus-visible { color: var(--electric); text-decoration-color: currentColor; }

/* ============================================================
   9. WHATSAPP FLOTANTE
   ============================================================ */
.whatsapp-float {
    position: fixed;
    right: 24px;
    bottom: 24px;
    width: 56px;
    height: 56px;
    display: grid;
    place-items: center;
    background: var(--whatsapp);
    color: #fff;
    border: 1px solid rgba(0,0,0,.35);
    border-radius: var(--r-sm);
    box-shadow: 4px 4px 0 rgba(4,18,41,.55);
    z-index: 950;
    transition: transform var(--t-fast) var(--ease-out), background var(--t-fast) ease, box-shadow var(--t-fast) var(--ease-out);
}
.whatsapp-float:hover { background: var(--whatsapp-hover); transform: translate(-2px, -2px); box-shadow: 6px 6px 0 rgba(4,18,41,.55); }
.whatsapp-float:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 rgba(4,18,41,.55); }
.whatsapp-float svg { width: 28px; height: 28px; }

/* ============================================================
   10. ACCESIBILIDAD / MOTION
   ============================================================ */
:focus-visible { outline: 3px solid var(--amp); outline-offset: 3px; border-radius: var(--r-xs); }
.on-ink :focus-visible, .hero-section :focus-visible { outline-color: var(--electric); }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
    }
    html { scroll-behavior: auto; }
    .hero-decor { transform: none !important; }
    .js-reveal-on .js-reveal { opacity: 1 !important; transform: none !important; }
}

/* ============================================================
   TRANSICIÓN ENTRE PÁGINAS — View Transitions API
   Sustituye al antiguo overlay de opacidad manejado por JS, que
   bloqueaba la navegación 400ms con un setTimeout y sólo animaba
   la salida: al entrar en la página nueva había un salto seco.
   Aquí lo hace el navegador, sin JS, animando salida y entrada, y
   funcionando también con los botones atrás y adelante.
   Navegador sin soporte (Firefox hoy): navegación normal, sin
   animación y sin nada roto. Es una mejora progresiva.
   ============================================================ */
@view-transition { navigation: auto; }

/* La animación sólo se declara para quien no ha pedido menos
   movimiento. Con reduced-motion la transición sigue existiendo
   —el navegador la resuelve con un corte limpio— pero no se
   desplaza ni se funde nada. */
@media (prefers-reduced-motion: no-preference) {

    /* Fundido corto y un desplazamiento mínimo, del mismo orden
       que el revelado al scroll (14px), para que las dos
       animaciones del sitio se sientan de la misma familia. */
    @keyframes vt-sale {
        from { opacity: 1; transform: translateY(0); }
        to   { opacity: 0; transform: translateY(-8px); }
    }
    @keyframes vt-entra {
        from { opacity: 0; transform: translateY(14px); }
        to   { opacity: 1; transform: translateY(0); }
    }

    ::view-transition-old(root) {
        animation: vt-sale .22s var(--ease-inout) both;
    }
    ::view-transition-new(root) {
        animation: vt-entra .34s var(--ease-out) both;
    }

    /* La barra de navegación y el botón de WhatsApp son idénticos en
       las 14 páginas. Al darles nombre propio quedan fuera del fundido
       del cuerpo: el navegador los trata como el mismo elemento a un
       lado y otro de la navegación, así que se mantienen quietos
       mientras el contenido cambia. Sin esto parpadearían con el resto.
       El nombre ha de ser único en cada página, y lo es: hay un solo
       header y un solo botón flotante. */
    header[role="banner"] { view-transition-name: sieec-nav; }
    .whatsapp-float      { view-transition-name: sieec-wa; }
}

button, a { -webkit-tap-highlight-color: rgba(0,0,0,0); }

/* ============================================================
   11. RESPONSIVE
   ============================================================ */

/* — >=600px — */
@media (min-width: 600px) {
    .footer-container { grid-template-columns: 1fr 1fr; }
}

/* — >=768px: la lámina y el texto conviven; el servicio gana su columna — */
@media (min-width: 768px) {
    .solucion-container { grid-template-columns: 1.05fr .95fr; align-items: center; }
    .about-container    { grid-template-columns: 1.05fr .95fr; align-items: center; }
    .contacto-grid      { grid-template-columns: .95fr 1.05fr; }


    .servicios-intro { grid-template-columns: 1.1fr .9fr; align-items: end; gap: var(--s-7); }
    .faq-head        { grid-template-columns: 1.1fr .9fr; align-items: end; gap: var(--s-7); }
    .footer-container { grid-template-columns: 1fr 1fr; gap: var(--s-6) var(--s-7); }
}

/* — >=980px: el pie se abre a cuatro columnas.
     Contacto y redes comparten la última para no fragmentar el ancho. — */
@media (min-width: 980px) {
    .footer-container {
        grid-template-columns: 1.3fr .8fr 1fr 1.2fr;
        grid-template-areas:
            "info nav servicios contacto"
            "info nav servicios social";
        grid-template-rows: auto 1fr;
        align-items: start;
        column-gap: clamp(2rem, 4vw, 3.5rem);
        row-gap: var(--s-6);
    }
    .footer-info      { grid-area: info; }
    .footer-nav       { grid-area: nav; }
    .footer-servicios { grid-area: servicios; }
    .footer-contact   { grid-area: contacto; }
    .footer-social    { grid-area: social; }
}

/* — >=1024px: navegación horizontal — */
@media (min-width: 1024px) {
    .hamburger { display: none; }
    .nav-overlay { display: none !important; }

    .nav-links {
        position: static;
        width: auto;
        height: auto;
        flex-direction: row;
        align-items: center;
        gap: 2px;
        padding: 0;
        background: transparent;
        border: none;
        overflow: visible;
    }
    .nav-links li { border-bottom: none; }
    .nav-links li:not(.nav-cta-mobile) a::before { content: none; }
    .nav-cta-mobile { display: none; }

    .nav-links a:not(.cta-navbar) {
        position: relative;
        display: block;
        padding: 10px 14px;
        font-family: var(--font-mono);
        font-size: var(--t-mono-lg);
        font-weight: 400;
        letter-spacing: .1em;
        text-transform: uppercase;
        color: var(--text-inv);
    }
    .nav-links a:not(.cta-navbar):hover { color: var(--electric); padding-left: 14px; }
    /* Indicador de sección: filete ámbar bajo el enlace activo (scrollspy) */
    .nav-links a:not(.cta-navbar)::after {
        content: "";
        position: absolute;
        left: 14px;
        right: 14px;
        bottom: 2px;
        height: 2px;
        background: var(--electric);
        transform: scaleX(0);
        transform-origin: left;
        transition: transform var(--t-med) var(--ease-out);
    }
    .nav-links a:not(.cta-navbar):hover::after,
    .nav-links a.is-active::after { transform: scaleX(1); }
    .nav-links a.is-active { color: var(--text-inv); }

    .cta-navbar-desktop { display: inline-flex; margin-left: var(--s-3); }

    .solucion-container { grid-template-columns: 1fr 1fr; gap: clamp(3rem, 6vw, 6rem); }
    .about-container    { grid-template-columns: .95fr 1.05fr; gap: clamp(3rem, 6vw, 6rem); }
    .hero-text { padding-bottom: clamp(2.5rem, 6vh, 5rem); }
}

/* — 1024–1279px: seis items más el CTA no caben con el interlineado
     holgado, así que se comprime el menú en lugar de esconderlo. — */
@media (min-width: 1024px) and (max-width: 1279px) {
    .navbar { gap: .5rem; }
    .nav-links a:not(.cta-navbar) { padding: 10px 9px; letter-spacing: .05em; }
    .nav-links a:not(.cta-navbar)::after { left: 9px; right: 9px; }
    .nav-links a:not(.cta-navbar):hover { padding-left: 9px; }
    .cta-navbar-desktop { margin-left: .25rem; }
    .cta-navbar { padding: 10px 14px; font-size: .8125rem; }
}

/* — >=1600px — */
@media (min-width: 1600px) {
    :root { --container: 1380px; --t-h1: clamp(3rem, min(4.8vw, 7.2vh), 5.6rem); }
}

/* — <900px: perfil e imagen apilados — */
@media (max-width: 899px) {
    .about-container { grid-template-columns: 1fr; }
    .about-image { max-width: 420px; }
    .about-image::before { top: -6px; left: -6px; }
    .about-image::after  { bottom: -6px; right: -6px; }
}

/* — <768px: el héroe se RECOMPONE, no se encoge — */
@media (max-width: 767px) {
    :root { --nav-h: 64px; }

    .hero-section { padding-top: calc(var(--nav-h) + 1.5rem); }
    .hero-text { padding-bottom: var(--s-6); justify-content: flex-end; }
    .hero-text h1 { max-width: 100%; letter-spacing: -0.035em; line-height: 1.02; }
    .hero-text > p:not([class]) { font-size: 1.0625rem; max-width: 100%; }
    .hero-actions { width: 100%; gap: 10px; margin-top: var(--s-6); }
    .hero-actions .cta-hero,
    .hero-actions .btn-ghost { width: 100%; }

    /* El rótulo y la nota se comprimen: en mono con .2em ocupaban tres líneas */
    .hero-eyebrow { letter-spacing: .1em; line-height: 1.6; margin-bottom: var(--s-4); }
    .hero-note { letter-spacing: .06em; font-size: .625rem; }

    /* La ficha de credenciales pasa de 4 columnas a 2x2 con filetes internos */
    .hero-specs { grid-template-columns: 1fr 1fr; padding-bottom: var(--s-5); }
    .hero-spec { padding: var(--s-4) var(--s-4) var(--s-4) 0; }
    .hero-spec:nth-child(even) { border-right: none; padding-right: 0; }
    .hero-spec:nth-child(n+3) { border-top: 1px solid var(--rule-inv); }


    /* Los dos controles de la sección ocupan el ancho completo */
    .servicios-actions { flex-direction: column; align-items: stretch; gap: 12px; }
    .servicios-actions .cta-servicios {
        width: 100%;
    }

    .faq-question { grid-template-columns: 2rem 1fr auto; gap: var(--s-3); }
    .faq-answer { padding-left: 2.75rem; }

    .form-container { box-shadow: 5px 5px 0 var(--electric); }
    .whatsapp-float { width: 52px; height: 52px; right: 18px; bottom: 18px; }
    .whatsapp-float svg { width: 26px; height: 26px; }
}

/* — Pantallas estrechas: el cajetín del formulario se apila y las
     etiquetas pierden tracking para no cortarse — */
@media (max-width: 480px) {
    .form-container { padding: 24px 18px; }
    .form-head { flex-direction: column; align-items: flex-start; gap: 6px; }
    label { letter-spacing: .08em; }
    .sec-mark { letter-spacing: .14em; }
}

@media (max-width: 400px) {
    .hero-text h1 { font-size: clamp(1.9rem, 9.5vw, 2.4rem); }
    .hero-eyebrow { font-size: .5625rem; letter-spacing: .14em; }
    .hero-specs { grid-template-columns: 1fr; }
    .hero-spec { border-right: none; padding-right: 0; }
    .hero-spec:nth-child(n+2) { border-top: 1px solid var(--rule-inv); }
    .logo-word b { font-size: .95rem; }

}