/* ===========================================================
   3IA's — Inteligencias Argentinas
   Paleta basada en el logo: celeste argentino, azul, navy y sol dorado
   =========================================================== */

:root {
    --celeste: #4ea8e0;
    --celeste-light: #7cc4f0;
    --blue: #1f6fc4;
    --blue-deep: #123a7a;
    --navy: #0b1437;
    --navy-2: #0f1c4d;
    --gold: #f2b134;
    --gold-soft: #ffcf6b;
    --white: #ffffff;
    --ink: #0b1437;
    --muted: #5b6785;
    --line: rgba(20, 40, 90, 0.10);
    --bg: #f5f8fd;
    --bg-card: #ffffff;

    --grad-brand: linear-gradient(135deg, var(--celeste) 0%, var(--blue) 55%, var(--navy-2) 100%);
    --grad-text: linear-gradient(120deg, var(--celeste-light), var(--gold-soft));
    --shadow-sm: 0 4px 16px rgba(11, 20, 55, 0.08);
    --shadow-md: 0 14px 40px rgba(11, 20, 55, 0.12);
    --shadow-lg: 0 30px 70px rgba(11, 20, 55, 0.22);
    --radius: 18px;
    --radius-lg: 26px;
    --container: 1180px;
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', system-ui, sans-serif;
    color: var(--ink);
    background: var(--bg);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, .brand-text strong {
    font-family: 'Sora', 'Inter', sans-serif;
    line-height: 1.12;
    letter-spacing: -0.02em;
}

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

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

.gradient-text {
    background: var(--grad-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ===== Fondo tecnológico ===== */
.tech-grid {
    position: fixed;
    inset: 0;
    z-index: -2;
    background:
        radial-gradient(900px 500px at 80% -10%, rgba(78, 168, 224, 0.12), transparent 60%),
        radial-gradient(700px 500px at 0% 20%, rgba(31, 111, 196, 0.10), transparent 55%),
        linear-gradient(180deg, var(--bg), #eef3fb);
}
.tech-grid::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(31, 111, 196, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(31, 111, 196, 0.05) 1px, transparent 1px);
    background-size: 46px 46px;
    mask-image: radial-gradient(circle at 50% 0%, black, transparent 75%);
}

/* ===== Botones ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 26px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.98rem;
    cursor: pointer;
    border: none;
    transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s;
    white-space: nowrap;
}
.btn-primary {
    background: var(--grad-brand);
    color: #fff;
    box-shadow: 0 10px 26px rgba(31, 111, 196, 0.35);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 16px 34px rgba(31, 111, 196, 0.45); }
.btn-ghost {
    background: rgba(255, 255, 255, 0.7);
    color: var(--navy);
    border: 1px solid var(--line);
    backdrop-filter: blur(8px);
}
.btn-ghost:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); border-color: var(--celeste); }
.btn-block { width: 100%; }

/* ===== Header ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background 0.3s, box-shadow 0.3s, padding 0.3s;
    padding: 14px 0;
}
.site-header.scrolled {
    background: rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(14px);
    box-shadow: 0 6px 24px rgba(11, 20, 55, 0.08);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo {
    width: 46px;
    height: 46px;
    border-radius: 12px;
    object-fit: cover;
    box-shadow: var(--shadow-sm);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.05; }
.brand-text strong { font-size: 1.25rem; color: var(--navy); font-weight: 800; }
.brand-text small { font-size: 0.68rem; color: var(--muted); letter-spacing: 0.04em; text-transform: uppercase; }

.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a {
    padding: 9px 16px;
    border-radius: 999px;
    font-weight: 500;
    color: var(--navy);
    font-size: 0.95rem;
    transition: color 0.2s, background 0.2s;
}
.main-nav a:hover, .main-nav a.active { color: var(--blue); background: rgba(78, 168, 224, 0.1); }
.main-nav .nav-cta {
    background: var(--grad-brand);
    color: #fff;
    box-shadow: 0 8px 20px rgba(31, 111, 196, 0.3);
}
.main-nav .nav-cta:hover { background: var(--grad-brand); color: #fff; transform: translateY(-2px); }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.nav-toggle span {
    width: 26px; height: 2.5px;
    background: var(--navy);
    border-radius: 3px;
    transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ===== Hero ===== */
.hero { position: relative; padding: 60px 0 0; overflow: hidden; }
.hero-bg {
    position: absolute;
    top: -10%; right: -10%;
    width: 620px; height: 620px;
    background: radial-gradient(circle, rgba(78, 168, 224, 0.35), transparent 65%);
    filter: blur(20px);
    z-index: -1;
}
.hero-inner {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 50px;
    align-items: center;
    padding-bottom: 40px;
}
.pill {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    background: rgba(255, 255, 255, 0.75);
    border: 1px solid var(--line);
    padding: 8px 16px;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--blue-deep);
    box-shadow: var(--shadow-sm);
    margin-bottom: 22px;
}
.pill-dot {
    width: 9px; height: 9px;
    border-radius: 50%;
    background: var(--gold);
    box-shadow: 0 0 0 4px rgba(242, 177, 52, 0.25);
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 3px rgba(242, 177, 52, 0.3); }
    50% { box-shadow: 0 0 0 8px rgba(242, 177, 52, 0); }
}
.hero-content h1 {
    font-size: clamp(2.4rem, 5vw, 3.7rem);
    font-weight: 800;
    color: var(--navy);
    margin-bottom: 20px;
}
.hero-lead {
    font-size: 1.12rem;
    color: var(--muted);
    max-width: 540px;
    margin-bottom: 30px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 44px; }
.hero-stats { display: flex; gap: 36px; flex-wrap: wrap; }
.stat strong {
    display: block;
    font-family: 'Sora', sans-serif;
    font-size: 2rem;
    font-weight: 800;
    color: var(--blue);
}
.stat span { font-size: 0.85rem; color: var(--muted); }

.hero-visual { position: relative; }
.hero-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: visible;
}
.hero-card img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    aspect-ratio: 4 / 4.4;
    object-fit: cover;
    animation: floaty 6s ease-in-out infinite;
}
@keyframes floaty {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-14px); }
}
.glass-badge {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    padding: 12px 16px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(255, 255, 255, 0.6);
}
.glass-badge strong { display: block; font-size: 0.92rem; color: var(--navy); }
.glass-badge small { color: var(--muted); font-size: 0.78rem; }
.badge-icon {
    width: 38px; height: 38px;
    display: grid; place-items: center;
    border-radius: 11px;
    background: var(--grad-brand);
    color: #fff;
    font-size: 1.1rem;
}
.badge-1 { top: 22px; left: -28px; animation: floaty 5s ease-in-out infinite; }
.badge-2 { bottom: 34px; right: -24px; animation: floaty 5s ease-in-out 1s infinite; }

/* ===== Marquee ===== */
.marquee {
    overflow: hidden;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.5);
    padding: 16px 0;
}
.marquee-track {
    display: flex;
    gap: 28px;
    white-space: nowrap;
    width: max-content;
    animation: scroll 26s linear infinite;
    font-family: 'Sora', sans-serif;
    font-weight: 600;
    color: var(--blue-deep);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-size: 0.92rem;
}
.marquee-track span:nth-child(even) { color: var(--gold); }
@keyframes scroll {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

/* ===== Secciones ===== */
.section { padding: 90px 0; }
.section-alt { background: rgba(255, 255, 255, 0.55); }
.section-head { max-width: 680px; margin: 0 auto 54px; text-align: center; }
.eyebrow {
    display: inline-block;
    font-family: 'Sora', sans-serif;
    font-weight: 700;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--blue);
    margin-bottom: 14px;
}
.eyebrow.light { color: var(--gold-soft); }
.section-head h2 {
    font-size: clamp(1.9rem, 3.6vw, 2.7rem);
    color: var(--navy);
    margin-bottom: 14px;
}
.section-head p { color: var(--muted); font-size: 1.05rem; }

/* ===== Cards ===== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.card {
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 30px 26px;
    transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s;
    position: relative;
    overflow: hidden;
}
.card::before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 4px;
    background: var(--grad-brand);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s var(--ease);
}
.card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); border-color: transparent; }
.card:hover::before { transform: scaleX(1); }
.card-icon {
    width: 56px; height: 56px;
    display: grid; place-items: center;
    font-size: 1.6rem;
    border-radius: 15px;
    background: linear-gradient(135deg, rgba(78, 168, 224, 0.15), rgba(31, 111, 196, 0.15));
    margin-bottom: 18px;
}
.card h3 { font-size: 1.22rem; color: var(--navy); margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 0.96rem; margin-bottom: 16px; }
.card-link { font-weight: 600; color: var(--blue); font-size: 0.92rem; transition: gap 0.2s; }
.card-link:hover { color: var(--blue-deep); }

/* ===== Split (Nosotros) ===== */
.split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.split-visual { position: relative; }
.split-visual img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    aspect-ratio: 4 / 3.4;
    object-fit: cover;
    position: relative;
    z-index: 2;
}
.split-accent {
    position: absolute;
    inset: -18px -18px auto auto;
    width: 70%; height: 70%;
    border-radius: var(--radius-lg);
    background: var(--grad-brand);
    opacity: 0.14;
    z-index: 1;
}
.split-content h2 {
    font-size: clamp(1.9rem, 3.4vw, 2.5rem);
    color: var(--navy);
    margin: 12px 0 16px;
}
.split-content p { color: var(--muted); margin-bottom: 22px; }
.check-list { display: grid; gap: 12px; margin-bottom: 30px; }
.check-list li {
    position: relative;
    padding-left: 34px;
    color: var(--navy);
    font-weight: 500;
}
.check-list li::before {
    content: "✓";
    position: absolute;
    left: 0; top: 0;
    width: 22px; height: 22px;
    display: grid; place-items: center;
    background: var(--grad-brand);
    color: #fff;
    border-radius: 50%;
    font-size: 0.72rem;
    font-weight: 700;
}

/* ===== Steps ===== */
.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
    margin-bottom: 56px;
}
.step {
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 28px 24px;
    position: relative;
    transition: transform 0.3s var(--ease), box-shadow 0.3s;
}
.step:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.step-num {
    font-family: 'Sora', sans-serif;
    font-size: 2.4rem;
    font-weight: 800;
    background: var(--grad-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: block;
    margin-bottom: 10px;
}
.step h3 { font-size: 1.15rem; color: var(--navy); margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 0.92rem; }

.tech-stack { text-align: center; }
.tech-stack > span {
    display: block;
    color: var(--muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 18px;
}
.stack-logos { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.stack-chip {
    padding: 10px 22px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid var(--line);
    border-radius: 999px;
    font-family: 'Sora', sans-serif;
    font-weight: 600;
    color: var(--blue-deep);
    font-size: 0.9rem;
    transition: transform 0.25s, border-color 0.25s, color 0.25s;
}
.stack-chip:hover { transform: translateY(-3px); border-color: var(--celeste); color: var(--blue); }

/* ===== CTA / Contacto ===== */
.cta-section {
    background: var(--navy);
    position: relative;
    overflow: hidden;
    margin: 0 24px;
    border-radius: 34px;
    padding: 74px 0;
}
.cta-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(600px 400px at 85% 20%, rgba(78, 168, 224, 0.28), transparent 60%),
        radial-gradient(500px 400px at 10% 90%, rgba(242, 177, 52, 0.18), transparent 60%);
}
.cta-inner {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}
.cta-content h2 { color: #fff; font-size: clamp(1.9rem, 3.4vw, 2.6rem); margin-bottom: 14px; }
.cta-content p { color: rgba(255, 255, 255, 0.72); font-size: 1.05rem; }
.cta-form {
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.14);
    backdrop-filter: blur(12px);
    padding: 28px;
    border-radius: var(--radius-lg);
    display: grid;
    gap: 14px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.cta-form input, .cta-form textarea {
    width: 100%;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 12px;
    padding: 13px 16px;
    color: #fff;
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.25s, background 0.25s;
    resize: vertical;
}
.cta-form input::placeholder, .cta-form textarea::placeholder { color: rgba(255, 255, 255, 0.5); }
.cta-form input:focus, .cta-form textarea:focus {
    outline: none;
    border-color: var(--celeste);
    background: rgba(255, 255, 255, 0.12);
}
.form-note { font-size: 0.88rem; color: var(--gold-soft); min-height: 12px; text-align: center; }

/* ===== Footer ===== */
.site-footer { background: var(--navy-2); color: rgba(255, 255, 255, 0.72); padding-top: 64px; margin-top: 90px; }
.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 46px;
}
.footer-brand .brand { margin-bottom: 16px; }
.footer-brand .brand-text strong { color: #fff; }
.footer-brand .brand-text small { color: rgba(255, 255, 255, 0.55); }
.footer-brand p { font-size: 0.94rem; max-width: 320px; margin-bottom: 18px; }
.social-links { display: flex; gap: 10px; }
.social-links a {
    width: 40px; height: 40px;
    display: grid; place-items: center;
    border-radius: 11px;
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    font-size: 0.82rem;
    font-weight: 600;
    text-transform: lowercase;
    transition: background 0.25s, transform 0.25s;
}
.social-links a:hover { background: var(--grad-brand); transform: translateY(-3px); }
.footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; }
.footer-col ul { display: grid; gap: 10px; }
.footer-col a, .footer-col li { font-size: 0.92rem; transition: color 0.2s; }
.footer-col a:hover { color: var(--celeste-light); }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.1); padding: 22px 0; }
.footer-bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 0.86rem;
}
.footer-legal { display: flex; gap: 20px; }
.footer-legal a:hover { color: var(--celeste-light); }

/* ===== Reveal animations ===== */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.visible { opacity: 1; transform: none; }

/* ===== Responsive ===== */
@media (max-width: 980px) {
    .hero-inner { grid-template-columns: 1fr; gap: 40px; }
    .hero-visual { max-width: 460px; margin: 0 auto; }
    .cards-grid { grid-template-columns: repeat(2, 1fr); }
    .steps { grid-template-columns: repeat(2, 1fr); }
    .split { grid-template-columns: 1fr; gap: 40px; }
    .cta-inner { grid-template-columns: 1fr; gap: 32px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
    .nav-toggle { display: flex; }
    .main-nav {
        position: fixed;
        top: 74px; right: 16px; left: 16px;
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
        background: rgba(255, 255, 255, 0.97);
        backdrop-filter: blur(16px);
        padding: 16px;
        border-radius: 18px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-14px);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s, transform 0.3s;
    }
    .main-nav.open { opacity: 1; transform: none; pointer-events: auto; }
    .main-nav a { text-align: center; }
    .section { padding: 64px 0; }
    .cards-grid, .steps, .footer-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .hero-stats { gap: 24px; }
    .badge-1 { left: 6px; }
    .badge-2 { right: 6px; }
    .cta-section { margin: 0 14px; border-radius: 26px; }
}

@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; scroll-behavior: auto; }
    .reveal { opacity: 1; transform: none; }
}

/* ===== Botón flotante de WhatsApp ===== */
.whatsapp-float {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 200;
    width: 60px;
    height: 60px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: #25d366;
    color: #fff;
    box-shadow: 0 12px 28px rgba(37, 211, 102, 0.45);
    transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
    animation: wa-pop 0.5s var(--ease) 0.8s both;
}
.whatsapp-float::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: #25d366;
    z-index: -1;
    animation: wa-ripple 2.4s ease-out infinite;
}
.whatsapp-float:hover { transform: scale(1.08); box-shadow: 0 16px 34px rgba(37, 211, 102, 0.6); }
.whatsapp-float svg { width: 32px; height: 32px; }
.whatsapp-tooltip {
    position: absolute;
    right: 74px;
    background: var(--navy);
    color: #fff;
    padding: 8px 14px;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 600;
    white-space: nowrap;
    box-shadow: var(--shadow-md);
    opacity: 0;
    transform: translateX(8px);
    pointer-events: none;
    transition: opacity 0.25s, transform 0.25s;
}
.whatsapp-tooltip::after {
    content: "";
    position: absolute;
    right: -5px;
    top: 50%;
    transform: translateY(-50%);
    border-left: 6px solid var(--navy);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
}
.whatsapp-float:hover .whatsapp-tooltip { opacity: 1; transform: translateX(0); }
@keyframes wa-pop {
    from { transform: scale(0); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}
@keyframes wa-ripple {
    0% { transform: scale(1); opacity: 0.5; }
    100% { transform: scale(1.7); opacity: 0; }
}
@media (max-width: 720px) {
    .whatsapp-float { right: 16px; bottom: 16px; width: 54px; height: 54px; }
    .whatsapp-float svg { width: 28px; height: 28px; }
    .whatsapp-tooltip { display: none; }
}

/* ===== Botón volver arriba ===== */
.scroll-top {
    position: fixed;
    left: 50%;
    bottom: 24px;
    transform: translateX(-50%) translateY(24px);
    z-index: 190;
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    border: none;
    cursor: pointer;
    border-radius: 50%;
    color: #fff;
    background: var(--grad-brand);
    box-shadow: 0 10px 26px rgba(31, 111, 196, 0.4);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s var(--ease), transform 0.35s var(--ease), box-shadow 0.25s;
}
.scroll-top.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
    animation: st-bounce 2.4s ease-in-out infinite;
}
.scroll-top:hover { box-shadow: 0 14px 30px rgba(31, 111, 196, 0.55); }
@keyframes st-bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-6px); }
}
@media (max-width: 720px) {
    .scroll-top { bottom: 18px; width: 44px; height: 44px; }
}

/* ===== Sección destacada / mockup WhatsApp ===== */
.featured { background: rgba(255, 255, 255, 0.55); }
.wa-flow {
    position: relative;
    max-width: 380px;
    margin: 0 auto;
    background: #e6ddd4;
    background-image: radial-gradient(rgba(255, 255, 255, 0.4) 1px, transparent 1px);
    background-size: 18px 18px;
    border-radius: 24px;
    padding: 0 0 18px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}
.wa-header {
    display: flex;
    align-items: center;
    gap: 12px;
    background: #075e54;
    color: #fff;
    padding: 14px 18px;
    margin-bottom: 16px;
}
.wa-avatar {
    width: 40px; height: 40px;
    display: grid; place-items: center;
    border-radius: 50%;
    background: #128c7e;
    font-family: 'Sora', sans-serif;
    font-weight: 700;
    font-size: 0.85rem;
}
.wa-header strong { display: block; font-size: 0.95rem; }
.wa-header small { font-size: 0.75rem; opacity: 0.8; }
.wa-msg {
    position: relative;
    max-width: 78%;
    margin: 0 16px 10px;
    padding: 9px 12px;
    border-radius: 12px;
    font-size: 0.9rem;
    line-height: 1.4;
    color: #0b1a17;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.12);
    animation: wa-in 0.5s var(--ease) both;
}
.wa-in { background: #fff; border-top-left-radius: 3px; }
.wa-out {
    background: #dcf8c6;
    margin-left: auto;
    border-top-right-radius: 3px;
    display: flex;
    flex-direction: column;
}
.wa-msg:nth-child(3) { animation-delay: 0.2s; }
.wa-msg:nth-child(4) { animation-delay: 0.5s; }
.wa-msg:nth-child(5) { animation-delay: 0.9s; }
.wa-receipt {
    border-radius: 8px;
    width: 100%;
    aspect-ratio: 3 / 4;
    object-fit: cover;
    margin-bottom: 4px;
}
.wa-out b { color: var(--blue-deep); }
.wa-time {
    display: block;
    text-align: right;
    font-size: 0.68rem;
    color: #5b6b62;
    margin-top: 3px;
}
.wa-typing {
    display: inline-flex;
    gap: 4px;
    background: #fff;
    padding: 12px 14px;
    border-radius: 12px;
    border-top-left-radius: 3px;
    margin: 0 16px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.12);
}
.wa-typing span {
    width: 7px; height: 7px;
    border-radius: 50%;
    background: #9aa5a0;
    animation: wa-dot 1.2s infinite ease-in-out;
}
.wa-typing span:nth-child(2) { animation-delay: 0.2s; }
.wa-typing span:nth-child(3) { animation-delay: 0.4s; }
@keyframes wa-dot {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
    30% { transform: translateY(-5px); opacity: 1; }
}
@keyframes wa-in {
    from { opacity: 0; transform: translateY(10px) scale(0.96); }
    to { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
    .wa-msg, .wa-typing span, .scroll-top.visible { animation: none !important; }
}