/* ==========================================================================
   PITA — Landing informativa
   Identidad tomada del sistema de diseño de la aplicación (resources/css/pita).
   ========================================================================== */

:root {
    --green: #1a9553;
    --green-hover: #157a43;
    --green-dark: #14663a;
    --green-darker: #0d3d23;
    --green-bright: #2ec878;
    --green-soft: #eaf5ee;

    --blue: #2f6fed;
    --purple: #7c53d6;
    --amber: #e0a325;
    --red: #dc4c48;

    --bg: #ffffff;
    --bg-alt: #f4f6f8;
    --surface: #ffffff;
    --border: #e8ebef;
    --text: #1f2a37;
    --text-muted: #6b7280;
    --text-soft: #9aa1ac;

    --radius: .9rem;
    --radius-sm: .6rem;
    --shadow-sm: 0 1px 3px rgba(16, 24, 40, .07), 0 1px 2px rgba(16, 24, 40, .04);
    --shadow: 0 10px 30px rgba(16, 24, 40, .08);
    --shadow-lg: 0 24px 60px rgba(13, 61, 35, .16);
    --ease: cubic-bezier(.16, 1, .3, 1);

    --maxw: 1120px;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: 'Figtree', system-ui, -apple-system, 'Segoe UI', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    /* Red de seguridad: ningún elemento debe generar scroll horizontal. */
    overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3 { line-height: 1.15; margin: 0; letter-spacing: -.02em; font-weight: 800; }

.container {
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    font-size: .8rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
    color: var(--green-dark);
    background: var(--green-soft);
    padding: .4rem .85rem;
    border-radius: 999px;
}
.eyebrow--light { background: rgba(255, 255, 255, .14); color: #fff; }

.section {
    padding: clamp(3.5rem, 8vw, 6.5rem) 0;
}
.section--alt { background: var(--bg-alt); }
.section--dark {
    background: radial-gradient(120% 120% at 80% 0%, var(--green-dark) 0%, var(--green-darker) 55%, #0a2e1a 100%);
    color: #fff;
}

.section__head {
    max-width: 640px;
    margin: 0 auto clamp(2.5rem, 5vw, 3.5rem);
    text-align: center;
}
.section__head h2 {
    font-size: clamp(1.7rem, 3.5vw, 2.5rem);
    margin-top: 1rem;
}
.section__head p {
    color: var(--text-muted);
    font-size: 1.08rem;
    margin: 1rem 0 0;
}
.section--dark .section__head p { color: rgba(255, 255, 255, .78); }

/* ------------------------------------------- Aparición progresiva (scroll) */

.js .reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.js .reveal.is-visible { opacity: 1; transform: none; }
/* Cascada suave entre hermanos de una misma fila/grid. */
.js .reveal:nth-child(2) { transition-delay: .05s; }
.js .reveal:nth-child(3) { transition-delay: .10s; }
.js .reveal:nth-child(4) { transition-delay: .15s; }
.js .reveal:nth-child(5) { transition-delay: .20s; }
.js .reveal:nth-child(6) { transition-delay: .25s; }

/* ---------------------------------------------------------------- Botones */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    font-weight: 700;
    font-size: 1rem;
    padding: .8rem 1.5rem;
    border-radius: 999px;
    border: 1.5px solid transparent;
    cursor: pointer;
    transition: transform .15s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
    white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary {
    background: var(--green);
    color: #fff;
    box-shadow: 0 8px 20px rgba(26, 149, 83, .28);
}
.btn--primary:hover { background: var(--green-hover); box-shadow: 0 12px 28px rgba(26, 149, 83, .35); }
.btn--ghost { background: transparent; color: var(--green-dark); border-color: var(--border); }
.btn--ghost:hover { border-color: var(--green); background: var(--green-soft); }
.btn--light { background: #fff; color: var(--green-dark); }
.btn--light:hover { box-shadow: 0 12px 28px rgba(0, 0, 0, .18); }
.btn--outline-light { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .4); }
.btn--outline-light:hover { border-color: #fff; background: rgba(255, 255, 255, .1); }

/* --------------------------------------------------------------- Navbar */

.nav {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, .85);
    backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--border);
    transition: box-shadow .25s ease, background .25s ease;
}
.nav.is-scrolled { background: rgba(255, 255, 255, .92); box-shadow: 0 6px 24px rgba(16, 24, 40, .06); }
.nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 1rem;
}
.nav__brand img { height: 30px; width: auto; }
.nav__links {
    display: flex;
    align-items: center;
    gap: 2rem;
    font-weight: 600;
    font-size: .95rem;
    color: var(--text-muted);
}
.nav__links a { position: relative; transition: color .2s ease; }
.nav__links a::after {
    content: ''; position: absolute; left: 0; right: 0; bottom: -6px; height: 2px;
    background: var(--green); border-radius: 2px; transform: scaleX(0); transform-origin: left;
    transition: transform .22s var(--ease);
}
.nav__links a:hover { color: var(--green-dark); }
.nav__links a:hover::after { transform: scaleX(1); }
.nav__cta { display: flex; align-items: center; gap: .75rem; }

/* Botón hamburguesa (solo móvil) */
.nav__toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px; height: 44px;
    padding: 10px;
    border: none; background: transparent; cursor: pointer;
}
.nav__toggle span {
    display: block; height: 2px; width: 100%;
    background: var(--text); border-radius: 2px;
    transition: transform .25s var(--ease), opacity .2s ease;
}
.nav__toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav__mobile { display: none; }

@media (max-width: 860px) {
    .nav__links { display: none; }
    .nav__cta { display: none; }
    .nav__toggle { display: flex; }
    .nav__mobile {
        display: block;
        padding: .25rem 1.5rem 1.35rem;
        background: rgba(255, 255, 255, .98);
        border-top: 1px solid var(--border);
    }
    .nav__mobile[hidden] { display: none; }
    .nav__mobile a {
        display: block; padding: .85rem 0; font-weight: 600;
        color: var(--text); border-bottom: 1px solid var(--border);
    }
    .nav__mobile-cta { display: flex; flex-direction: column; gap: .6rem; margin-top: 1.1rem; }
    .nav__mobile-cta .btn { width: 100%; }
}

/* ----------------------------------------------------------------- Hero */

.hero {
    position: relative;
    overflow: hidden;
    padding: clamp(3rem, 7vw, 5.5rem) 0 clamp(3.5rem, 8vw, 6rem);
    background: var(--bg);
}
.hero__glow {
    position: absolute; inset: 0; z-index: 0; pointer-events: none;
    background:
        radial-gradient(45% 55% at 88% 6%, rgba(46, 200, 120, .20), transparent 60%),
        radial-gradient(42% 52% at 4% 96%, rgba(47, 111, 237, .12), transparent 55%);
}
/* Trama de puntos que se desvanece hacia abajo. */
.hero::before {
    content: ''; position: absolute; inset: 0; z-index: 0; pointer-events: none;
    background-image: radial-gradient(circle, rgba(13, 61, 35, .06) 1px, transparent 1.4px);
    background-size: 26px 26px;
    -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 72%);
    mask-image: linear-gradient(to bottom, #000 0%, transparent 72%);
}
.hero__grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    gap: clamp(2rem, 5vw, 4rem);
    align-items: center;
}
.hero h1 {
    font-size: clamp(2.2rem, 5.2vw, 3.6rem);
    font-weight: 900;
    margin: 1.25rem 0 0;
}
.hero h1 .accent {
    background: linear-gradient(120deg, var(--green) 0%, var(--green-bright) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.hero__sub {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin: 1.4rem 0 0;
    max-width: 34rem;
}
.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: .85rem;
    margin-top: 2rem;
}
.hero__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.75rem;
    margin-top: 2.5rem;
    padding-top: 1.75rem;
    border-top: 1px solid var(--border);
}
.hero__meta .n { font-size: 1.6rem; font-weight: 800; color: var(--green-dark); }
.hero__meta .l { font-size: .82rem; color: var(--text-muted); }

/* Tarjeta visual del hero: simula la consulta por QR */
.hero__visual { position: relative; }
.trace-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 1.25rem;
    box-shadow: var(--shadow-lg);
    padding: 1.5rem;
    width: 100%;
    max-width: 380px;
    margin-left: auto;
}
.trace-card__top { display: flex; align-items: center; gap: .85rem; margin-bottom: 1.1rem; }
.trace-card__qr {
    width: 60px; height: 60px; flex: 0 0 auto;
    border-radius: 12px; padding: 3px;
    background: #fff; border: 1px solid var(--border);
    display: block; transition: transform .2s var(--ease), box-shadow .2s ease;
}
.trace-card__qr img { width: 100%; height: 100%; border-radius: 8px; }
.trace-card__qr:hover { transform: scale(1.06); box-shadow: var(--shadow-sm); }
.trace-card__code { font-family: 'Courier New', monospace; font-weight: 700; font-size: .82rem; color: var(--green-dark); }
.trace-card__code span { display: block; font-family: 'Figtree', sans-serif; font-weight: 600; font-size: .95rem; color: var(--text); }
.trace-step {
    display: flex; gap: .85rem; align-items: flex-start;
    padding: .7rem 0;
    position: relative;
}
.trace-step:not(:last-child)::before {
    content: ''; position: absolute; left: 13px; top: 30px; bottom: -4px;
    width: 2px; background: var(--border);
}
.trace-step__dot {
    width: 28px; height: 28px; border-radius: 50%; flex: 0 0 auto;
    display: flex; align-items: center; justify-content: center;
    background: var(--green-soft); color: var(--green-dark);
    font-size: .95rem; z-index: 1;
}
.trace-step__dot--done { background: var(--green); color: #fff; }
.trace-step__t { font-weight: 700; font-size: .9rem; }
.trace-step__d { font-size: .78rem; color: var(--text-muted); }
.trace-card__badge {
    margin-top: 1rem; padding: .6rem .8rem; border-radius: .6rem;
    background: var(--green-soft); color: var(--green-dark);
    font-size: .82rem; font-weight: 700; display: flex; align-items: center; gap: .5rem;
}

@media (max-width: 860px) {
    .hero__grid { grid-template-columns: 1fr; }
    .hero__visual { order: -1; }
    .trace-card { margin: 0 auto; }
    .hero__sub { max-width: none; }
}

/* -------------------------------------------------- Alcance / categorías */

.scope { padding: clamp(1.75rem, 4vw, 2.75rem) 0; background: var(--bg); }
.scope__inner {
    display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
    gap: 1.25rem 2rem;
    padding: clamp(1.35rem, 3vw, 1.85rem) clamp(1.35rem, 3vw, 2rem);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: linear-gradient(120deg, var(--green-soft), #fff 72%);
    box-shadow: var(--shadow-sm);
}
.scope__lead { margin: 0; color: var(--text-muted); font-size: 1rem; max-width: 34rem; }
.scope__lead b { color: var(--text); }
.scope__tags { display: flex; flex-wrap: wrap; gap: .6rem; list-style: none; padding: 0; margin: 0; }
.scope__tag {
    display: inline-flex; align-items: center; gap: .5rem;
    font-weight: 700; font-size: .9rem; color: var(--text-muted);
    background: #fff; border: 1px solid var(--border);
    padding: .5rem .85rem; border-radius: 999px;
}
.scope__tag span {
    font-size: .66rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em;
    color: var(--text-soft); background: var(--bg-alt); padding: .15rem .45rem; border-radius: 999px;
}
.scope__tag.is-active { color: var(--green-dark); border-color: var(--green); background: var(--green-soft); }
.scope__tag.is-active span { color: #fff; background: var(--green); }

/* --------------------------------------------------------- Cadena (flow) */

.chain {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1rem;
}
.chain__item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.4rem 1.1rem;
    position: relative;
    box-shadow: var(--shadow-sm);
    transition: transform .18s var(--ease), box-shadow .2s ease;
}
.chain__item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.chain__item::after {
    content: '→';
    position: absolute; right: -.85rem; top: 50%; transform: translateY(-50%);
    color: var(--green-bright); font-weight: 800; font-size: 1.2rem; z-index: 2;
}
.chain__item:last-child::after { display: none; }
.chain__ico {
    width: 40px; height: 40px; border-radius: 10px;
    background: var(--green-soft); color: var(--green-dark);
    display: flex; align-items: center; justify-content: center; margin-bottom: .8rem;
    font-size: 1.15rem;
}
.chain__n { font-size: .72rem; font-weight: 700; color: var(--text-soft); letter-spacing: .05em; }
.chain__t { font-weight: 700; font-size: 1rem; margin: .15rem 0 .35rem; }
.chain__d { font-size: .82rem; color: var(--text-muted); }

@media (max-width: 980px) {
    .chain { grid-template-columns: repeat(2, 1fr); }
    .chain__item::after { display: none; }
}
@media (max-width: 480px) {
    .chain { grid-template-columns: 1fr; }
}

/* --------------------------------------------------- Características (grid) */

.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}
.feature {
    position: relative;
    overflow: hidden;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.6rem;
    transition: transform .18s var(--ease), box-shadow .2s ease, border-color .2s ease;
}
.feature::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, var(--green), var(--green-bright));
    transform: scaleX(0); transform-origin: left;
    transition: transform .25s var(--ease);
}
.feature:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: #d7dde4; }
.feature:hover::before { transform: scaleX(1); }
.feature__ico {
    width: 46px; height: 46px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center; margin-bottom: 1rem;
}
.feature__ico svg { width: 24px; height: 24px; }
.feature h3 { font-size: 1.12rem; font-weight: 700; }
.feature p { color: var(--text-muted); font-size: .95rem; margin: .5rem 0 0; }

/* Colores por icono */
.ico-green  { background: var(--green-soft); color: var(--green-dark); }
.ico-blue   { background: #eaf1ff; color: var(--blue); }
.ico-purple { background: #f1ebfb; color: var(--purple); }
.ico-amber  { background: #fbf1dc; color: #a9761a; }
.ico-red    { background: #fdecec; color: var(--red); }

@media (max-width: 900px) { .features { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .features { grid-template-columns: 1fr; } }

/* ----------------------------------------------------- Consulta pública */

.qr-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2rem, 5vw, 4rem);
    align-items: center;
}
.qr-split__title { font-size: clamp(1.7rem, 3.5vw, 2.4rem); margin-top: 1rem; }
.qr-split__lead { color: var(--text-muted); font-size: 1.08rem; margin-top: 1rem; }
.qr-split__cta { margin-top: 2rem; }
.qr-split__panel {
    background: linear-gradient(160deg, var(--green-dark), var(--green-darker));
    border-radius: 1.5rem;
    padding: clamp(2rem, 4vw, 3rem);
    color: #fff;
    box-shadow: var(--shadow-lg);
    text-align: center;
}
.qr-big {
    display: block;
    width: clamp(150px, 42vw, 210px);
    margin: 0 auto 1rem;
    padding: 12px;
    background: #fff;
    border-radius: 20px;
    box-shadow: 0 14px 34px rgba(0, 0, 0, .22);
    transition: transform .2s var(--ease), box-shadow .2s ease;
}
.qr-big img { width: 100%; height: auto; border-radius: 8px; }
.qr-big:hover { transform: translateY(-3px); box-shadow: 0 20px 44px rgba(0, 0, 0, .28); }
.qr-big__url { font-weight: 800; letter-spacing: .01em; color: #fff; margin: 0 0 .5rem; font-size: 1.05rem; }
.qr-split__panel p { text-align: center; color: rgba(255, 255, 255, .82); margin: 0; font-size: .92rem; }
.qr-big__link {
    display: inline-block; margin-top: 1.1rem;
    font-weight: 700; font-size: .92rem; color: #fff;
    border-bottom: 2px solid rgba(255, 255, 255, .4);
    padding-bottom: 2px; transition: border-color .2s ease;
}
.qr-big__link:hover { border-color: #fff; }
.qr-split ul { list-style: none; padding: 0; margin: 1.5rem 0 0; display: grid; gap: 1rem; }
.qr-split li { display: flex; gap: .85rem; align-items: flex-start; }
.qr-split li .check {
    flex: 0 0 auto; width: 24px; height: 24px; border-radius: 50%;
    background: var(--green-soft); color: var(--green-dark);
    display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: .8rem;
}
.qr-split li b { display: block; }
.qr-split li span { color: var(--text-muted); font-size: .9rem; }

@media (max-width: 820px) {
    .qr-split { grid-template-columns: 1fr; }
    .qr-split__panel { order: -1; max-width: 420px; margin: 0 auto; }
}

/* ------------------------------------------------------- Beneficios */

.benefits {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}
.benefit {
    border-radius: var(--radius);
    padding: 1.75rem;
    border: 1px solid rgba(255, 255, 255, .12);
    background: rgba(255, 255, 255, .05);
    transition: transform .18s var(--ease), background .2s ease, border-color .2s ease;
}
.benefit:hover { transform: translateY(-4px); background: rgba(255, 255, 255, .08); border-color: rgba(255, 255, 255, .22); }
.benefit h3 { font-size: 1.2rem; display: flex; align-items: center; gap: .6rem; }
.benefit ul { list-style: none; padding: 0; margin: 1rem 0 0; display: grid; gap: .6rem; }
.benefit li { position: relative; padding-left: 1.4rem; color: rgba(255, 255, 255, .82); font-size: .92rem; }
.benefit li::before { content: '✓'; position: absolute; left: 0; color: var(--green-bright); font-weight: 800; }
.benefit__tag { font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--green-bright); }

@media (max-width: 900px) { .benefits { grid-template-columns: 1fr; } }

/* ----------------------------------------------------------- Confianza */

.trust {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}
.trust__item {
    text-align: center;
    padding: 1.5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    transition: transform .18s var(--ease), box-shadow .2s ease;
}
.trust__item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.trust__item .ico {
    width: 48px; height: 48px; margin: 0 auto .9rem; border-radius: 12px;
    background: var(--green-soft); color: var(--green-dark);
    display: flex; align-items: center; justify-content: center; font-size: 1.3rem;
}
.trust__item h3 { font-size: 1.05rem; }
.trust__item p { color: var(--text-muted); font-size: .9rem; margin: .5rem 0 0; }
@media (max-width: 760px) { .trust { grid-template-columns: 1fr; } }

/* --------------------------------------------------------------- CTA final */

.cta {
    position: relative;
    overflow: hidden;
    text-align: center;
    background: linear-gradient(135deg, var(--green) 0%, var(--green-dark) 100%);
    color: #fff;
    border-radius: 1.5rem;
    padding: clamp(2.5rem, 6vw, 4rem);
    box-shadow: var(--shadow-lg);
}
.cta::before {
    content: ''; position: absolute; inset: 0; pointer-events: none;
    background: radial-gradient(40% 80% at 90% 10%, rgba(255, 255, 255, .18), transparent 60%);
}
.cta > * { position: relative; z-index: 1; }
.cta h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
.cta p { color: rgba(255, 255, 255, .85); font-size: 1.08rem; margin: 1rem auto 0; max-width: 34rem; }
.cta__actions { display: flex; flex-wrap: wrap; gap: .85rem; justify-content: center; margin-top: 2rem; }

/* ---------------------------------------------------------------- Footer */

.footer {
    background: #0a2e1a;
    color: rgba(255, 255, 255, .7);
    padding: 3.5rem 0 2rem;
}
.footer__grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 2rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, .1);
}
.footer__brand { display: flex; align-items: center; gap: .7rem; margin-bottom: .9rem; }
.footer__brand img { height: 30px; }
.footer__brand span { font-weight: 800; font-size: 1.3rem; color: #fff; letter-spacing: -.02em; }
.footer__tag { font-size: .9rem; max-width: 24rem; }
.footer h4 { color: #fff; font-size: .95rem; margin: 0 0 1rem; }
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: .6rem; }
.footer a { transition: color .2s ease; }
.footer a:hover { color: #fff; }
.footer__bottom {
    display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between;
    padding-top: 1.75rem; font-size: .85rem;
}
@media (max-width: 760px) { .footer__grid { grid-template-columns: 1fr; gap: 1.75rem; } }

@media (prefers-reduced-motion: reduce) {
    * { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
    .btn:hover, .feature:hover, .chain__item:hover, .trust__item:hover, .benefit:hover, .qr-big:hover, .trace-card__qr:hover { transform: none; }
    .js .reveal { opacity: 1; transform: none; }
}

/* ==========================================================================
   Página de demostración (demo.html) — árbol de trazabilidad de ejemplo
   ========================================================================== */

.demo { background: var(--bg-alt); }

.demo-nav {
    position: sticky; top: 0; z-index: 50;
    background: rgba(255, 255, 255, .9);
    backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--border);
}
.demo-nav__inner { display: flex; align-items: center; justify-content: space-between; height: 66px; gap: 1rem; }
.demo-nav__right { display: flex; align-items: center; gap: 1.25rem; }
.demo-nav__back { font-weight: 600; font-size: .92rem; color: var(--text-muted); transition: color .2s ease; }
.demo-nav__back:hover { color: var(--green-dark); }
@media (max-width: 560px) { .demo-nav__back { display: none; } }

.demo-banner {
    background: var(--green-darker); color: #fff;
    font-size: .9rem; padding: .7rem 0; text-align: center;
}
.demo-banner b { font-weight: 800; }

.demo-main { padding: clamp(1.75rem, 4vw, 3rem) 0 clamp(3rem, 6vw, 4.5rem); }

/* Cabecera del producto */
.prod {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 1.25rem;
    box-shadow: var(--shadow);
    padding: clamp(1.5rem, 3vw, 2.25rem);
}
.prod__head { display: flex; flex-wrap: wrap; gap: 1.25rem 2rem; align-items: flex-start; justify-content: space-between; }
.prod__eyebrow { font-size: .78rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: var(--green-dark); }
.prod__id h1 { font-size: clamp(1.6rem, 4vw, 2.3rem); font-weight: 900; margin: .5rem 0 .6rem; }
.prod__id h1 span { color: var(--text-muted); font-weight: 700; }
.prod__code {
    display: inline-block; font-family: 'Courier New', monospace; font-weight: 700;
    color: var(--green-dark); background: var(--green-soft);
    padding: .3rem .7rem; border-radius: .5rem; font-size: .9rem; letter-spacing: .02em;
}
.prod__verified {
    display: flex; align-items: center; gap: .75rem;
    background: var(--green-soft); border: 1px solid rgba(26, 149, 83, .25);
    border-radius: 1rem; padding: .85rem 1.1rem;
}
.prod__check {
    flex: 0 0 auto; width: 34px; height: 34px; border-radius: 50%;
    background: var(--green); color: #fff; font-weight: 800;
    display: flex; align-items: center; justify-content: center;
}
.prod__verified b { display: block; color: var(--green-dark); font-size: .95rem; }
.prod__verified span { font-size: .82rem; color: var(--text-muted); }

.prod__facts {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
    margin-top: 1.75rem; background: var(--border);
    border: 1px solid var(--border); border-radius: .9rem; overflow: hidden;
}
.fact { background: var(--surface); padding: .9rem 1rem; display: flex; flex-direction: column; gap: .15rem; }
.fact__l { font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--text-soft); }
.fact__v { font-weight: 700; font-size: .95rem; color: var(--text); }
.fact__v--ok { color: var(--green-dark); }
@media (max-width: 680px) { .prod__facts { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 420px) { .prod__facts { grid-template-columns: 1fr; } }

/* Timeline / árbol */
.tl__title { font-size: clamp(1.4rem, 3vw, 1.9rem); font-weight: 800; margin: clamp(2rem, 4vw, 3rem) 0 1.5rem; }
.tl { list-style: none; margin: 0; padding: 0; position: relative; }
.tl__item { position: relative; display: grid; grid-template-columns: 48px 1fr; gap: 1rem; padding-bottom: 1.25rem; }
.tl__marker { position: relative; display: flex; justify-content: center; }
.tl__item:not(:last-child) .tl__marker::before {
    content: ''; position: absolute; top: 44px; bottom: -1.25rem; left: 50%;
    transform: translateX(-50%); width: 2px; background: var(--green-soft);
}
.tl__dot {
    width: 44px; height: 44px; border-radius: 50%; flex: 0 0 auto; z-index: 1;
    display: flex; align-items: center; justify-content: center; font-size: 1.2rem;
    background: var(--green-soft); border: 2px solid var(--border);
}
.tl__dot--done { background: var(--green); border-color: var(--green); }
.tl__dot--now { background: #fff; border-color: var(--green); box-shadow: 0 0 0 4px var(--green-soft); }
.tl__card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 1.25rem 1.35rem; box-shadow: var(--shadow-sm);
}
.tl__card--now { border-color: var(--green); box-shadow: 0 0 0 3px var(--green-soft), var(--shadow-sm); }
.tl__top { display: flex; flex-wrap: wrap; gap: .5rem 1rem; align-items: center; justify-content: space-between; }
.tl__step { font-size: .74rem; font-weight: 800; text-transform: uppercase; letter-spacing: .05em; color: var(--green-dark); }
.tl__top time { font-size: .82rem; color: var(--text-soft); font-weight: 600; }
.tl__card h3 { font-size: 1.1rem; font-weight: 800; margin: .5rem 0 .4rem; }
.tl__card p { color: var(--text-muted); font-size: .92rem; margin: 0; }
.kvs { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1rem; }
.kv {
    display: inline-flex; align-items: center; gap: .4rem;
    font-size: .82rem; color: var(--text);
    background: var(--bg-alt); border: 1px solid var(--border);
    padding: .35rem .65rem; border-radius: .5rem;
}
.kv b { font-weight: 700; color: var(--text-soft); font-size: .72rem; text-transform: uppercase; letter-spacing: .03em; }
.kv--ok { background: var(--green-soft); border-color: rgba(26, 149, 83, .25); color: var(--green-dark); }
.kv--ok b { color: var(--green); }

/* CTA de la demo */
.demo-cta {
    text-align: center; margin-top: clamp(2rem, 4vw, 3rem);
    background: linear-gradient(135deg, var(--green) 0%, var(--green-dark) 100%);
    color: #fff; border-radius: 1.25rem; padding: clamp(2rem, 5vw, 3rem); box-shadow: var(--shadow-lg);
}
.demo-cta h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
.demo-cta p { color: rgba(255, 255, 255, .85); margin: .75rem auto 0; max-width: 32rem; }
.demo-cta__actions { display: flex; flex-wrap: wrap; gap: .85rem; justify-content: center; margin-top: 1.75rem; }
.demo-cta .btn--ghost { background: rgba(255, 255, 255, .12); color: #fff; border-color: rgba(255, 255, 255, .35); }
.demo-cta .btn--ghost:hover { background: rgba(255, 255, 255, .2); border-color: #fff; }

/* --- Optimización móvil de la demo -------------------------------------- */
@media (max-width: 640px) {
    .demo-nav__inner { height: 60px; }
    .demo-nav__right { gap: .75rem; }
    .demo-banner { font-size: .82rem; padding: .6rem 0; text-align: left; line-height: 1.45; }

    .prod { padding: 1.15rem; border-radius: 1rem; }
    .prod__head { gap: 1rem; }
    .prod__verified { width: 100%; }
    .prod__facts { margin-top: 1.25rem; }

    .tl__title { margin: 2rem 0 1.15rem; }
    /* Marcador más compacto: la tarjeta gana ancho útil. */
    .tl__item { grid-template-columns: 34px 1fr; gap: .7rem; padding-bottom: 1rem; }
    .tl__dot { width: 34px; height: 34px; font-size: 1rem; border-width: 2px; }
    .tl__dot--now { box-shadow: 0 0 0 3px var(--green-soft); }
    .tl__item:not(:last-child) .tl__marker::before { top: 36px; bottom: -1rem; }
    .tl__card { padding: 1rem 1.05rem; }
    .tl__card h3 { font-size: 1.02rem; margin: .4rem 0 .35rem; }
    .tl__card p { font-size: .89rem; }

    /* Datos como filas etiqueta ↔ valor: aprovechan todo el ancho y se leen mejor. */
    .kvs { flex-direction: column; align-items: stretch; gap: .4rem; margin-top: .9rem; }
    .kv { width: 100%; justify-content: space-between; gap: .75rem; padding: .5rem .7rem; font-size: .86rem; }
    .kv b { flex: 0 0 auto; }

    .demo-cta { padding: 1.85rem 1.25rem; border-radius: 1rem; }
    .demo-cta__actions { gap: .65rem; }
    .demo-cta__actions .btn { width: 100%; }
}

@media (max-width: 380px) {
    .tl__item { grid-template-columns: 30px 1fr; gap: .6rem; }
    .tl__dot { width: 30px; height: 30px; font-size: .9rem; }
    .tl__item:not(:last-child) .tl__marker::before { top: 32px; }
    .kv { font-size: .82rem; padding: .45rem .6rem; }
}

/* ---------------------------------------------------- Botón flotante WhatsApp */

.whatsapp-fab {
    position: fixed;
    right: 1.25rem;
    bottom: 1.25rem;
    z-index: 60;
    display: inline-flex;
    align-items: center;
    gap: .55rem;
    background: #25d366;
    color: #fff;
    padding: .8rem 1.1rem;
    border-radius: 999px;
    box-shadow: 0 10px 26px rgba(0, 0, 0, .22);
    text-decoration: none;
    font-weight: 700;
    font-size: .92rem;
    line-height: 1;
    transition: transform .18s var(--ease, ease), box-shadow .2s ease, background .2s ease;
}
.whatsapp-fab:hover { background: #1ebe57; transform: translateY(-2px); box-shadow: 0 14px 32px rgba(0, 0, 0, .28); }
.whatsapp-fab:focus-visible { outline: 3px solid #0d3d23; outline-offset: 3px; }
.whatsapp-fab svg { width: 26px; height: 26px; flex: 0 0 auto; }
.whatsapp-fab__text { white-space: nowrap; }

@media (max-width: 560px) {
    .whatsapp-fab {
        right: 1rem;
        bottom: 1rem;
        padding: .85rem;
    }
    .whatsapp-fab__text { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    .whatsapp-fab { transition: none; }
    .whatsapp-fab:hover { transform: none; }
}