/* ============================================================
   ACTUA PROYECTOS INTEGRALES — Diseño monocromo profesional
   Paleta: blanco, negro y grises. Elegante y sobrio.
   ============================================================ */

:root {
    --ink: #101216;          /* casi negro */
    --ink-2: #23262c;        /* negro suave */
    --ink-soft: #5c6167;     /* gris texto secundario */
    --bg: #ffffff;
    --bg-tint: #f6f7f8;      /* gris muy claro */
    --line: #e5e7ea;
    --radius: 14px;
    --shadow: 0 8px 24px rgba(16, 18, 22, 0.08);
    --shadow-lg: 0 20px 48px rgba(16, 18, 22, 0.14);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: "Inter", system-ui, sans-serif;
    color: var(--ink);
    background: var(--bg);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; transition: 0.25s ease; }

.container { width: min(1180px, 92%); margin: auto; }

/* ================= TOP BAR ================= */
.topbar {
    background: var(--ink);
    color: #c9ccd1;
    font-size: 0.82rem;
    padding: 0.45rem 0;
}
.topbar-inner {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.4rem;
}
.topbar a:hover { color: #fff; }

/* ================= HEADER ================= */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
}
.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.7rem 0;
}
.logo-area { display: flex; align-items: center; gap: 0.75rem; }
.logo-img { width: 56px; height: 56px; object-fit: contain; }
.logo-text { line-height: 1.15; }
.logo-text strong {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    color: var(--ink);
}
.logo-text span {
    display: block;
    font-size: 0.72rem;
    color: var(--ink-soft);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

/* ---- Nav ---- */
.nav { display: flex; align-items: center; gap: 1.6rem; font-size: 0.93rem; font-weight: 500; }
.nav a { position: relative; padding: 0.3rem 0; }
.nav a:not(.btn-nav)::after {
    content: "";
    position: absolute;
    left: 0; bottom: -2px;
    width: 0; height: 2px;
    background: var(--ink);
    transition: width 0.3s ease;
}
.nav a:not(.btn-nav):hover::after { width: 100%; }

.btn-nav {
    background: var(--ink);
    color: #fff !important;
    padding: 0.55rem 1.4rem;
    border-radius: 999px;
    box-shadow: 0 6px 16px rgba(16, 18, 22, 0.25);
}
.btn-nav:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(16, 18, 22, 0.32); }

/* ---- Hamburguesa ---- */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}
.nav-toggle span {
    width: 26px; height: 3px;
    background: var(--ink);
    border-radius: 2px;
    transition: 0.3s;
}

/* ================= HERO SLIDER ================= */
.hero-slider {
    position: relative;
    height: min(78vh, 640px);
    min-height: 460px;
    overflow: hidden;
    background: var(--ink);
}
.slide {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    opacity: 0;
    transition: opacity 0.9s ease;
    background:
        linear-gradient(100deg, rgba(10, 11, 14, 0.90) 30%, rgba(10, 11, 14, 0.55) 60%, rgba(10, 11, 14, 0.25)),
        var(--bg) center/cover no-repeat;
    pointer-events: none;
}
.slide.active { opacity: 1; pointer-events: auto; }

.slide-content { color: #fff; max-width: 700px; }
.slide-content h1, .slide-content h2 {
    font-size: clamp(1.8rem, 4vw, 3.1rem);
    font-weight: 800;
    line-height: 1.15;
    margin: 0.6rem 0 1rem;
    text-shadow: 0 2px 18px rgba(0, 0, 0, 0.4);
}
.slide-content p {
    font-size: clamp(1rem, 1.6vw, 1.2rem);
    color: #dcdfe3;
    margin-bottom: 1.8rem;
}
.slide-tag {
    display: inline-block;
    background: #fff;
    color: var(--ink);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    padding: 0.35rem 1rem;
    border-radius: 999px;
}

/* Animación de entrada del contenido activo */
.slide.active .slide-content > * {
    animation: slideUp 0.8s ease both;
}
.slide.active .slide-content > *:nth-child(2) { animation-delay: 0.12s; }
.slide.active .slide-content > *:nth-child(3) { animation-delay: 0.24s; }
.slide.active .slide-content > *:nth-child(4) { animation-delay: 0.36s; }

@keyframes slideUp {
    from { opacity: 0; transform: translateY(26px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Flechas y puntos */
.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 46px; height: 46px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.16);
    backdrop-filter: blur(6px);
    color: #fff;
    font-size: 1.6rem;
    line-height: 1;
    cursor: pointer;
    transition: 0.25s;
    z-index: 5;
}
.slider-arrow:hover { background: #fff; color: var(--ink); }
.slider-arrow.prev { left: 1.2rem; }
.slider-arrow.next { right: 1.2rem; }

.slider-arrow.static {
    position: static;
    transform: none;
    background: #fff;
    color: var(--ink);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.slider-arrow.static:hover { background: var(--ink); color: #fff; }

.slider-dots {
    position: absolute;
    bottom: 1.4rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.55rem;
    z-index: 5;
}
.slider-dots button {
    width: 11px; height: 11px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: 0.3s;
    padding: 0;
}
.slider-dots button.active { background: #fff; width: 30px; border-radius: 999px; }

/* ================= FRANJA DE CONFIANZA ================= */
.trust-strip {
    background: var(--ink);
    color: #fff;
    padding: 1.2rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.trust-inner {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
    text-align: center;
}
.trust-item strong { display: block; font-size: 1.05rem; letter-spacing: 0.03em; }
.trust-item span { font-size: 0.8rem; color: #9ba0a7; }

/* ================= SECCIONES ================= */
.section { padding: 5.5rem 0; }
.section-tint { background: var(--bg-tint); }

.section-kicker {
    display: inline-block;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ink-soft);
    margin-bottom: 0.4rem;
}
.section-kicker.light { color: #9ba0a7; }

.section-title {
    font-size: clamp(1.7rem, 3.2vw, 2.3rem);
    font-weight: 800;
    margin: 0 0 0.6rem;
    text-align: center;
    letter-spacing: -0.01em;
}
.section-title.left { text-align: left; }
.section > .container > .section-kicker { display: table; margin: 0 auto 0.4rem; }

.section-sub {
    text-align: center;
    color: var(--ink-soft);
    max-width: 560px;
    margin: 0 auto 3rem;
}

/* ================= TARJETAS ================= */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
    gap: 1.6rem;
    margin-top: 2.5rem;
}

.card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
    opacity: 0;
    transform: translateY(24px);
}
.card.visible { opacity: 1; transform: translateY(0); }
.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--ink);
}
.card h3 { margin: 0.9rem 0 0.5rem; font-size: 1.15rem; }
.card p { color: var(--ink-soft); margin: 0 0 1rem; font-size: 0.95rem; }

.card-icon {
    width: 56px; height: 56px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    font-size: 1.5rem;
    background: var(--ink);
    color: #fff;
}

.card-link { color: var(--ink); font-weight: 600; font-size: 0.9rem; border-bottom: 1px solid transparent; }
.card-link:hover { border-color: var(--ink); }

/* Tarjetas con imagen */
.card-img { padding: 0; overflow: hidden; }
.card-img img { height: 190px; width: 100%; object-fit: cover; transition: transform 0.5s ease; filter: grayscale(35%); }
.card-img:hover img { transform: scale(1.05); filter: grayscale(0%); }
.card-img .card-body { padding: 1.5rem 1.8rem 1.8rem; }

/* ================= OFERTAS (SLIDER) ================= */
.offers-viewport { overflow: hidden; }
.offers-track {
    display: flex;
    gap: 24px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    padding: 0.5rem 0.2rem 1.2rem;
}
.offers-track::-webkit-scrollbar { display: none; }

.offer {
    position: relative;
    flex: 0 0 min(340px, 85vw);
    scroll-snap-align: start;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    padding: 1.8rem;
    box-shadow: var(--shadow);
    transition: transform 0.35s ease, box-shadow 0.35s ease;
    opacity: 0;
    transform: translateY(24px);
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}
.offer::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: var(--ink);
}
.offer.visible { opacity: 1; transform: translateY(0); }
.offer:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.offer h3 { margin: 0; font-size: 1.12rem; }
.offer p { color: var(--ink-soft); margin: 0; flex: 1; font-size: 0.95rem; }

.offer-badge {
    align-self: flex-start;
    background: var(--ink);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 0.3rem 0.85rem;
    border-radius: 999px;
}

.offers-nav {
    display: flex;
    justify-content: center;
    gap: 0.8rem;
    margin-top: 0.6rem;
}

/* ================= BOTONES ================= */
.btn-primary {
    display: inline-block;
    background: var(--ink);
    color: #fff;
    font-weight: 600;
    padding: 0.95rem 2rem;
    border-radius: 999px;
    box-shadow: 0 8px 20px rgba(16, 18, 22, 0.28);
    transition: 0.25s ease;
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 14px 28px rgba(16, 18, 22, 0.38); background: var(--ink-2); }
.btn-primary.btn-sm { padding: 0.65rem 1.4rem; font-size: 0.9rem; align-self: flex-start; }

/* Botón invertido para fondos oscuros */
.btn-primary.btn-invert { background: #fff; color: var(--ink); }
.btn-primary.btn-invert:hover { background: #e8eaed; }

.btn-secondary {
    display: inline-block;
    padding: 0.95rem 2rem;
    border-radius: 999px;
    border: 2px solid rgba(255, 255, 255, 0.8);
    color: #fff;
    font-weight: 600;
    transition: 0.25s ease;
}
.btn-secondary:hover { background: #fff; color: var(--ink); }

.hero-buttons { display: flex; flex-wrap: wrap; gap: 1rem; }

/* ================= POR QUÉ ACTUA ================= */
.section-dark {
    background: linear-gradient(160deg, #101216, #1c1f24);
    color: #eceef0;
}
.section-dark .section-title { color: #fff; }

.split {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3.5rem;
    align-items: center;
}
.split-text, .split-img {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.split-text.visible, .split-img.visible { opacity: 1; transform: translateY(0); }

.split-img img {
    max-width: 380px;
    margin: auto;
    filter: drop-shadow(0 18px 40px rgba(0, 0, 0, 0.45)) grayscale(100%) brightness(1.6);
    animation: float 5s ease-in-out infinite;
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-14px); }
}

.check-list {
    list-style: none;
    padding: 0;
    margin: 1.4rem 0 2rem;
}
.check-list li {
    padding-left: 2rem;
    position: relative;
    margin-bottom: 0.9rem;
    color: #c9ccd1;
}
.check-list li::before {
    content: "✔";
    position: absolute;
    left: 0;
    color: #fff;
    font-weight: 700;
}

/* ================= FAQ ================= */
.faq-wrap { max-width: 780px; }

.faq-item {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-top: 1rem;
    padding: 0;
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease, box-shadow 0.3s ease;
    overflow: hidden;
}
.faq-item.visible { opacity: 1; transform: translateY(0); }
.faq-item:hover { box-shadow: var(--shadow-lg); }

.faq-item summary {
    cursor: pointer;
    font-weight: 600;
    padding: 1.2rem 3rem 1.2rem 1.5rem;
    list-style: none;
    position: relative;
    user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: "+";
    position: absolute;
    right: 1.4rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.4rem;
    font-weight: 400;
    color: var(--ink-soft);
    transition: transform 0.3s ease;
}
.faq-item[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-item p {
    margin: 0;
    padding: 0 1.5rem 1.4rem;
    color: var(--ink-soft);
    font-size: 0.95rem;
}

.section > .container.faq-wrap > .section-kicker { display: table; margin: 0 auto 0.4rem; }

/* ================= CONTACTO ================= */
.contact-wrap {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 3.5rem;
    align-items: start;
}
.contact-info p { color: var(--ink-soft); }
.contact-mail a { color: var(--ink); font-weight: 600; border-bottom: 1px solid var(--ink); }

.contact-form {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 2.4rem;
    box-shadow: var(--shadow-lg);
}
.contact-form label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
    color: var(--ink);
}
.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    margin-bottom: 1.1rem;
    border-radius: 10px;
    border: 1.5px solid var(--line);
    background: var(--bg-tint);
    color: var(--ink);
    font-family: inherit;
    font-size: 0.95rem;
    transition: 0.25s ease;
}
.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--ink);
    box-shadow: 0 0 0 4px rgba(16, 18, 22, 0.10);
    outline: none;
    background: #fff;
}

.btn-full {
    width: 100%;
    padding: 1rem;
    border-radius: 999px;
    border: none;
    background: var(--ink);
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    box-shadow: 0 8px 20px rgba(16, 18, 22, 0.28);
    transition: 0.25s ease;
    font-family: inherit;
}
.btn-full:hover { transform: translateY(-3px); box-shadow: 0 14px 28px rgba(16, 18, 22, 0.38); background: var(--ink-2); }

/* ================= FOOTER ================= */
.footer {
    background: var(--ink);
    color: #9ba0a7;
    padding: 3rem 0 0;
    font-size: 0.9rem;
}
.footer-inner {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
    padding-bottom: 2rem;
}
.footer-brand { display: flex; gap: 1rem; align-items: flex-start; max-width: 420px; }
.footer-brand img { background: #fff; border-radius: 10px; padding: 4px; }
.footer-brand strong { color: #fff; }

.footer-legal { display: flex; flex-direction: column; gap: 0.55rem; }
.footer-legal a:hover { color: #fff; }

.footer-copy {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    padding: 1.2rem 0;
    font-size: 0.82rem;
}

/* ================= RESPONSIVE ================= */
@media (max-width: 900px) {
    .split, .contact-wrap { grid-template-columns: 1fr; gap: 2.5rem; }
    .split-img img { max-width: 280px; }
}

@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        padding: 0 6%;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease;
        border-bottom: 1px solid var(--line);
        box-shadow: var(--shadow);
    }
    .nav.open { max-height: 420px; padding: 1rem 6%; }
    .nav a { width: 100%; padding: 0.8rem 0; }
    .btn-nav { text-align: center; margin-top: 0.5rem; }

    .topbar-inner { justify-content: center; text-align: center; }
    .hero-slider { min-height: 540px; }
    .slider-arrow.prev { left: 0.5rem; }
    .slider-arrow.next { right: 0.5rem; }
    .section { padding: 3.8rem 0; }
}

/* Accesibilidad: menos animación si el usuario lo pide */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}