/* =====================================================
   ConstruCasa - Hoja de estilos
   Paleta: azul · morado · rosado
   ===================================================== */

:root {
    --azul: #1e40af;
    --azul-claro: #3b82f6;
    --azul-oscuro: #1e3a8a;
    --morado: #7c3aed;
    --morado-claro: #a855f7;
    --rosado: #ec4899;
    --rosado-claro: #f472b6;
    --gradient: linear-gradient(135deg, #1e40af 0%, #7c3aed 50%, #ec4899 100%);
    --gradient-soft: linear-gradient(135deg, #dbeafe 0%, #ede9fe 50%, #fce7f3 100%);
    --gradient-cta: linear-gradient(90deg, #1e40af, #7c3aed);
    --gradient-cta-hover: linear-gradient(90deg, #7c3aed, #ec4899);
    --oscuro: #0f172a;
    --oscuro-2: #1e293b;
    --claro: #ffffff;
    --gris-1: #f8fafc;
    --gris-2: #e2e8f0;
    --gris-3: #cbd5e1;
    --texto: #334155;
    --texto-claro: #64748b;
    --shadow-sm: 0 2px 8px rgba(30, 64, 175, 0.06);
    --shadow-md: 0 10px 30px rgba(30, 64, 175, 0.10);
    --shadow-lg: 0 20px 50px rgba(30, 64, 175, 0.15);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 24px;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--texto);
    background: var(--claro);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; transition: color .2s; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { padding-left: 1.25rem; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

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

/* ===== Header ===== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--gris-2);
    transition: box-shadow .3s;
}
.header.scrolled { box-shadow: var(--shadow-sm); }
.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 1rem;
}
.logo { display: flex; align-items: center; gap: .65rem; font-weight: 800; font-size: 1.25rem; color: var(--oscuro); }
.logo__icon { display: inline-flex; }
.logo__text span {
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}
.nav { display: flex; align-items: center; gap: 1.4rem; }
.nav a {
    font-weight: 500;
    font-size: .95rem;
    color: var(--texto);
    position: relative;
    padding: .35rem 0;
}
.nav a:hover { color: var(--morado); }
.nav a::after {
    content: "";
    position: absolute;
    left: 0; bottom: -4px;
    width: 0; height: 2px;
    background: var(--gradient);
    transition: width .3s;
}
.nav a:hover::after { width: 100%; }
.nav__cta {
    background: var(--gradient-cta);
    color: #fff !important;
    padding: .55rem 1.15rem !important;
    border-radius: 999px;
    box-shadow: var(--shadow-sm);
}
.nav__cta::after { display: none; }
.nav__cta:hover { background: var(--gradient-cta-hover); transform: translateY(-1px); }
.menu-toggle {
    display: none;
    width: 44px; height: 44px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    border-radius: 10px;
    background: var(--gris-1);
}
.menu-toggle span {
    width: 22px; height: 2px;
    background: var(--oscuro);
    border-radius: 2px;
    transition: transform .3s, opacity .3s;
}
.menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Hero ===== */
.hero {
    position: relative;
    overflow: hidden;
    padding: 4rem 0 5rem;
    color: #fff;
}
.hero__bg {
    position: absolute;
    inset: 0;
    background: var(--gradient);
    z-index: -1;
}
.hero__bg::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(236, 72, 153, .4), transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(30, 64, 175, .5), transparent 40%);
}
.hero__bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: .6;
}
.hero__inner {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 3rem;
    align-items: center;
    position: relative;
}
.hero__badge {
    display: inline-block;
    background: rgba(255, 255, 255, .15);
    border: 1px solid rgba(255, 255, 255, .25);
    padding: .4rem 1rem;
    border-radius: 999px;
    font-size: .85rem;
    margin-bottom: 1.25rem;
    backdrop-filter: blur(8px);
}
.hero__title {
    font-size: clamp(2.2rem, 5vw, 3.6rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.25rem;
}
.hero__subtitle {
    font-size: 1.1rem;
    max-width: 560px;
    opacity: .95;
    margin-bottom: 2rem;
}
.hero__cta { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 2.5rem; }
.hero__stats {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, .2);
}
.hero__stats > div { display: flex; flex-direction: column; }
.hero__stats strong { font-size: 1.7rem; font-weight: 800; }
.hero__stats span { font-size: .85rem; opacity: .85; }

.hero__visual {
    position: relative;
    height: 460px;
}
.hero__card {
    position: absolute;
    background: rgba(255, 255, 255, .13);
    border: 1px solid rgba(255, 255, 255, .25);
    backdrop-filter: blur(10px);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    box-shadow: var(--shadow-lg);
    color: #fff;
    width: 220px;
    transition: transform .4s;
}
.hero__card:hover { transform: translateY(-6px); }
.hero__card h4 { font-size: 1.05rem; margin-bottom: .35rem; }
.hero__card p { font-size: .85rem; opacity: .9; }
.hero__card-icon { font-size: 2rem; margin-bottom: .4rem; }
.hero__card--1 { top: 0; left: 5%; animation: floaty 6s ease-in-out infinite; }
.hero__card--2 { top: 8%; right: 0; animation: floaty 6s ease-in-out infinite 1.5s; }
.hero__card--3 { bottom: 8%; left: 0; animation: floaty 6s ease-in-out infinite 3s; }
.hero__card--4 { bottom: 0; right: 5%; animation: floaty 6s ease-in-out infinite 4.5s; }

@keyframes floaty {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: .9rem 1.6rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: .95rem;
    transition: transform .2s, box-shadow .2s, background .3s;
    cursor: pointer;
    border: 2px solid transparent;
    text-align: center;
}
.btn--primary {
    background: var(--gradient-cta);
    color: #fff;
    box-shadow: var(--shadow-md);
}
.btn--primary:hover {
    background: var(--gradient-cta-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}
.btn--ghost {
    background: rgba(255, 255, 255, .15);
    color: #fff;
    border-color: rgba(255, 255, 255, .35);
    backdrop-filter: blur(8px);
}
.btn--ghost:hover { background: rgba(255, 255, 255, .25); transform: translateY(-2px); }
.btn--block { width: 100%; }

/* ===== Section heads ===== */
.section__head { text-align: center; max-width: 720px; margin: 0 auto 3rem; }
.section__eyebrow {
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: .15em;
    font-size: .8rem;
    font-weight: 700;
    color: var(--morado);
    background: var(--gradient-soft);
    padding: .35rem 1rem;
    border-radius: 999px;
    margin-bottom: 1rem;
}
.section__title {
    font-size: clamp(1.8rem, 3.6vw, 2.6rem);
    font-weight: 800;
    color: var(--oscuro);
    line-height: 1.15;
    margin-bottom: 1rem;
}
.section__lead { font-size: 1.05rem; color: var(--texto-claro); }

/* ===== About ===== */
.about { padding: 5rem 0; background: var(--gris-1); }
.about__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}
.about__item {
    background: #fff;
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border-top: 4px solid;
    border-image: var(--gradient) 1;
    transition: transform .3s, box-shadow .3s;
}
.about__item:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.about__icon { font-size: 2.5rem; margin-bottom: 1rem; }
.about__item h3 { color: var(--oscuro); margin-bottom: .5rem; font-size: 1.25rem; }
.about__item p { color: var(--texto-claro); }

/* ===== Services ===== */
.services { padding: 5rem 0; }
.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}
.service-card {
    background: #fff;
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gris-2);
    transition: transform .3s, box-shadow .3s, border-color .3s;
    position: relative;
    overflow: hidden;
}
.service-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--gradient-soft);
    opacity: 0;
    transition: opacity .3s;
    z-index: 0;
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.service-card:hover::before { opacity: .4; }
.service-card > * { position: relative; z-index: 1; }
.service-card__icon {
    width: 56px; height: 56px;
    border-radius: 14px;
    background: var(--gradient-cta);
    color: #fff;
    display: grid; place-items: center;
    font-size: 1.6rem;
    margin-bottom: 1rem;
}
.service-card h3 { color: var(--oscuro); margin-bottom: .5rem; font-size: 1.2rem; }
.service-card p { color: var(--texto-claro); margin-bottom: 1rem; }
.service-card__link {
    font-weight: 600;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

/* ===== Topics ===== */
.topics { padding: 5rem 0; background: var(--gris-1); }
.topic {
    background: #fff;
    border-radius: var(--radius);
    padding: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
    border-left: 6px solid;
    border-image: var(--gradient) 1;
    transition: transform .3s, box-shadow .3s;
}
.topic:hover { transform: translateX(6px); box-shadow: var(--shadow-md); }
.topic__head { display: flex; align-items: center; gap: 1rem; margin-bottom: 1rem; flex-wrap: wrap; }
.topic__num {
    background: var(--gradient-cta);
    color: #fff;
    width: 48px; height: 48px;
    display: grid; place-items: center;
    border-radius: 12px;
    font-weight: 800;
    font-size: 1.1rem;
}
.topic__head h3 { color: var(--oscuro); font-size: 1.4rem; }
.topic__body p { color: var(--texto); margin-bottom: 1rem; }
.topic__body h4 { color: var(--morado); margin: 1.25rem 0 .5rem; font-size: 1.05rem; }
.topic__body ul, .topic__body ol { color: var(--texto); padding-left: 1.4rem; }
.topic__body li { margin-bottom: .35rem; }
.topic__body strong { color: var(--oscuro); }

/* ===== Norms table ===== */
.norms { padding: 5rem 0; }
.table-wrap { overflow-x: auto; border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.norms-table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    min-width: 600px;
}
.norms-table thead { background: var(--gradient-cta); color: #fff; }
.norms-table th, .norms-table td { padding: 1rem 1.25rem; text-align: left; }
.norms-table th { font-weight: 700; }
.norms-table tbody tr { border-bottom: 1px solid var(--gris-2); transition: background .2s; }
.norms-table tbody tr:hover { background: var(--gradient-soft); }
.norms-table tbody tr:last-child { border-bottom: none; }
.norms-table td:first-child { font-weight: 700; color: var(--morado); }

/* ===== Guides ===== */
.guides { padding: 5rem 0; background: var(--gris-1); }
.guides__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}
.guide-card {
    background: #fff;
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border-top: 4px solid transparent;
    transition: transform .3s, box-shadow .3s, border-color .3s;
    position: relative;
}
.guide-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-top-color: var(--rosado); }
.guide-card__tag {
    display: inline-block;
    background: var(--gradient-soft);
    color: var(--morado);
    font-size: .75rem;
    font-weight: 700;
    padding: .25rem .8rem;
    border-radius: 999px;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: .05em;
}
.guide-card h3 { color: var(--oscuro); margin-bottom: .6rem; font-size: 1.15rem; }
.guide-card p { color: var(--texto-claro); margin-bottom: 1rem; }
.guide-card__cta {
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

/* ===== FAQ ===== */
.faq { padding: 5rem 0; }
.faq__list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 1rem; }
.faq__item {
    background: #fff;
    border: 1px solid var(--gris-2);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    transition: border-color .3s, box-shadow .3s;
}
.faq__item[open] { border-color: var(--morado); box-shadow: var(--shadow-sm); }
.faq__item summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--oscuro);
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
    content: "+";
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--morado);
    transition: transform .3s;
}
.faq__item[open] summary::after { transform: rotate(45deg); }
.faq__item p { margin-top: .75rem; color: var(--texto); }
.faq__item a { color: var(--morado); font-weight: 600; text-decoration: underline; }

/* ===== Contact ===== */
.contact { padding: 5rem 0; background: var(--gris-1); }
.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 2.5rem;
    align-items: start;
}
.contact__info h3 { color: var(--oscuro); font-size: 1.5rem; margin-bottom: 1rem; }
.contact__info > p { color: var(--texto-claro); margin-bottom: 1.5rem; }
.contact__list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 1rem; margin-bottom: 1.5rem; }
.contact__list li { display: flex; align-items: center; gap: 1rem; }
.contact__icon {
    width: 48px; height: 48px;
    background: var(--gradient-soft);
    border-radius: 12px;
    display: grid; place-items: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}
.contact__list strong { display: block; color: var(--oscuro); font-size: .9rem; }
.contact__list span, .contact__list a { color: var(--texto); }
.contact__list a:hover { color: var(--morado); }
.contact__note {
    background: var(--gradient-soft);
    padding: 1rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: .92rem;
    color: var(--oscuro);
    border-left: 4px solid var(--rosado);
}

.contact__form {
    background: #fff;
    padding: 2.25rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.contact__form h3 { color: var(--oscuro); font-size: 1.4rem; margin-bottom: .5rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.contact__form label { display: flex; flex-direction: column; gap: .4rem; font-size: .9rem; color: var(--texto); font-weight: 500; }
.contact__form label.full { width: 100%; }
.contact__form input,
.contact__form select,
.contact__form textarea {
    width: 100%;
    padding: .8rem 1rem;
    border: 1.5px solid var(--gris-2);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: .95rem;
    color: var(--oscuro);
    background: var(--gris-1);
    transition: border-color .2s, background .2s;
}
.contact__form input:focus,
.contact__form select:focus,
.contact__form textarea:focus {
    outline: none;
    border-color: var(--morado);
    background: #fff;
}
.contact__form textarea { resize: vertical; min-height: 120px; }
.form__small { font-size: .8rem; color: var(--texto-claro); }
.form__small a { color: var(--morado); text-decoration: underline; }

/* ===== Footer ===== */
.footer {
    background: var(--oscuro);
    color: #cbd5e1;
    padding: 4rem 0 1.5rem;
}
.footer__grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
    gap: 2.5rem;
    margin-bottom: 3rem;
}
.footer__col h4 { color: #fff; margin-bottom: 1rem; font-size: 1.05rem; }
.footer__col ul { list-style: none; padding: 0; }
.footer__col li { margin-bottom: .5rem; }
.footer__col a:hover { color: var(--rosado-claro); }
.footer__col p { color: #94a3b8; font-size: .92rem; }
.logo--footer { color: #fff; margin-bottom: 1rem; }
.logo--footer .logo__text span { -webkit-text-fill-color: transparent; }
.footer__contact { font-size: .9rem; }
.footer__contact strong { color: #fff; }
.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, .08);
    padding-top: 1.5rem;
    text-align: center;
    font-size: .85rem;
    color: #94a3b8;
    display: flex;
    flex-direction: column;
    gap: .35rem;
}
.footer__legal a { color: var(--rosado-claro); text-decoration: underline; }

/* ===== Back to top ===== */
.back-to-top {
    position: fixed;
    right: 1.5rem;
    bottom: 1.5rem;
    width: 48px; height: 48px;
    background: var(--gradient-cta);
    color: #fff;
    border-radius: 50%;
    font-size: 1.4rem;
    font-weight: 700;
    box-shadow: var(--shadow-md);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity .3s, transform .3s, background .3s;
    z-index: 50;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { background: var(--gradient-cta-hover); transform: translateY(-4px); }

/* ===== Politicas page ===== */
.policy-page { padding: 4rem 0; }
.policy-page h1 { color: var(--oscuro); font-size: 2.2rem; margin-bottom: 1rem; }
.policy-page h2 { color: var(--oscuro); font-size: 1.4rem; margin: 2rem 0 .75rem; }
.policy-page h3 { color: var(--morado); font-size: 1.1rem; margin: 1.25rem 0 .5rem; }
.policy-page p, .policy-page li { color: var(--texto); margin-bottom: .75rem; }
.policy-page ul, .policy-page ol { padding-left: 1.5rem; }
.policy-page .meta { color: var(--texto-claro); font-size: .95rem; margin-bottom: 2rem; }
.policy-page .lead-box {
    background: var(--gradient-soft);
    padding: 1.5rem;
    border-radius: var(--radius);
    margin-bottom: 2rem;
    border-left: 4px solid var(--morado);
}

/* ===== Responsive ===== */
@media (max-width: 980px) {
    .hero__inner { grid-template-columns: 1fr; }
    .hero__visual { height: 380px; max-width: 480px; margin: 0 auto; }
    .hero__card--1 { left: 0; }
    .hero__card--4 { right: 0; }
    .contact__grid { grid-template-columns: 1fr; }
    .footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
    .nav {
        position: fixed;
        inset: 72px 0 auto 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        padding: 1.5rem;
        gap: .5rem;
        border-bottom: 1px solid var(--gris-2);
        box-shadow: var(--shadow-md);
        transform: translateY(-110%);
        transition: transform .3s;
    }
    .nav.open { transform: translateY(0); }
    .nav a { padding: .75rem 0; border-bottom: 1px solid var(--gris-2); }
    .nav a::after { display: none; }
    .nav__cta { text-align: center; }
    .menu-toggle { display: flex; }
    .hero { padding: 3rem 0 4rem; }
    .hero__visual { height: 320px; }
    .hero__card { width: 180px; padding: 1rem; }
    .form-row { grid-template-columns: 1fr; }
    .footer__grid { grid-template-columns: 1fr; }
    .section__head { margin-bottom: 2rem; }
    .topic, .service-card, .guide-card, .contact__form { padding: 1.5rem; }
}
@media (max-width: 480px) {
    .hero__stats { gap: 1.25rem; }
    .hero__stats strong { font-size: 1.4rem; }
    .hero__visual { height: 280px; }
    .hero__card { width: 160px; }
    .hero__card-icon { font-size: 1.5rem; }
    .hero__card h4 { font-size: .95rem; }
    .hero__card p { font-size: .78rem; }
}

/* ===== Scroll reveal ===== */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s, transform .6s; }
.reveal.in { opacity: 1; transform: translateY(0); }