/* ==========================================================================
   Layout / contenedor
   ========================================================================== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.seccion { padding: var(--space-7) var(--space-4); }
.seccion-sm { padding: var(--space-6) var(--space-4); }

.seccion-cabecera { max-width: 700px; margin: 0 auto var(--space-6) auto; text-align: center; }
.seccion-titulo { font-size: var(--text-3xl); margin-bottom: var(--space-2); }
.seccion-subtitulo { color: var(--color-text); font-size: var(--text-lg); margin: 0; }

.seccion-oscura {
    background-color: var(--color-bg-dark);
    color: var(--color-text-on-dark);
}
.seccion-oscura h1, .seccion-oscura h2, .seccion-oscura h3 { color: var(--color-neutral-0); }

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

/* ==========================================================================
   Eyebrow / badge de sección
   ========================================================================== */
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background-color: var(--color-accent-100);
    color: var(--color-accent-700);
    font-size: var(--text-xs);
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 6px 16px;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-3);
}
.seccion-oscura .eyebrow {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-accent-500);
}

/* ==========================================================================
   Encabezado / navegación
   ========================================================================== */
header {
    background-color: var(--color-bg-alt);
    padding: 15px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: var(--z-header);
}
.logo-container { display: flex; flex-direction: column; }
.logo-texto { font-size: 24px; font-weight: 800; color: var(--color-primary-900); }
.slogan { font-size: 13px; color: var(--color-accent-700); font-weight: 700; margin-top: 2px; }

.nav-links { display: flex; gap: 25px; }
.nav-links a {
    text-decoration: none;
    color: var(--color-primary-900);
    font-weight: 600;
    transition: color var(--duration-fast) ease;
    position: relative;
}
.nav-links a::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--color-accent-600);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--duration-fast) ease;
}
.nav-links a:hover::after, .nav-links a.activo::after { transform: scaleX(1); }
.nav-links a:hover, .nav-links a.activo { color: var(--color-accent-700); }

.menu-toggle {
    display: none;
    font-size: 28px;
    color: var(--color-primary-900);
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    line-height: 1;
}

/* ==========================================================================
   Botones
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius-full);
    font-size: var(--text-base);
    font-weight: 700;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: transform var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out), background-color var(--duration-fast) ease;
}
.btn:hover { transform: translateY(-2px); }

.btn-whatsapp {
    background-color: var(--color-success-500);
    color: var(--color-neutral-0);
    box-shadow: 0 4px 15px rgba(15, 122, 61, 0.35);
}
.btn-whatsapp:hover { background-color: var(--color-success-600); box-shadow: 0 6px 20px rgba(15, 122, 61, 0.5); }

.btn-primario {
    background-color: var(--color-accent-600);
    color: var(--color-neutral-0);
    box-shadow: var(--shadow-md);
}
.btn-primario:hover { background-color: var(--color-accent-700); }

.btn-secundario {
    background-color: transparent;
    color: var(--color-primary-900);
    border: 1.5px solid var(--color-neutral-300);
}
.btn-secundario:hover { border-color: var(--color-accent-600); color: var(--color-accent-700); }

.seccion-oscura .btn-secundario { color: var(--color-neutral-0); border-color: rgba(255,255,255,0.3); }
.seccion-oscura .btn-secundario:hover { border-color: var(--color-neutral-0); }

.btn-blanco {
    background-color: var(--color-neutral-0);
    color: var(--color-accent-700);
}
.btn-blanco:hover { background-color: var(--color-primary-900); color: var(--color-neutral-0); }

/* ==========================================================================
   Hero (portada)
   ========================================================================== */
.hero {
    background:
        linear-gradient(135deg, rgba(10,31,63,0.92) 0%, rgba(15,42,82,0.88) 100%),
        url('../img/hero/hero-plomeria.jpg') center/cover;
    color: var(--color-neutral-0);
    padding: 130px 20px 90px 20px;
    text-align: center;
}
.hero .eyebrow { background-color: rgba(255,255,255,0.12); color: var(--color-accent-500); }
.hero h1 {
    font-size: clamp(2.25rem, 4vw + 1rem, 3.25rem);
    margin-bottom: var(--space-3);
    max-width: 800px;
    margin-left: auto; margin-right: auto;
    color: var(--color-neutral-0);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}
.hero p { font-size: var(--text-lg); max-width: 700px; margin: 0 auto var(--space-5) auto; color: #f1f5f9; text-shadow: 1px 1px 3px rgba(0,0,0,0.5); }
.hero-acciones { display: flex; gap: var(--space-3); justify-content: center; flex-wrap: wrap; }

.cobertura {
    background-color: var(--color-accent-600);
    color: var(--color-neutral-0);
    padding: var(--space-3);
    text-align: center;
    font-size: var(--text-base);
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   Banner interno (páginas secundarias)
   ========================================================================== */
.banner-interno {
    background: linear-gradient(135deg, var(--color-primary-900) 0%, var(--color-primary-600) 100%);
    color: var(--color-neutral-0);
    padding: 80px 20px;
    text-align: center;
}
.banner-interno h1 { font-size: var(--text-4xl); margin-bottom: var(--space-2); color: var(--color-neutral-0); }
.banner-interno p { font-size: var(--text-lg); max-width: 700px; margin: 0 auto; color: var(--color-text-on-dark); }

/* ==========================================================================
   Tarjetas — genérico
   ========================================================================== */
.tarjeta {
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: left;
    overflow: hidden;
    transition: transform var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out);
    display: flex;
    flex-direction: column;
}
.tarjeta:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.tarjeta img { width: 100%; height: 220px; object-fit: cover; border-bottom: 4px solid var(--color-accent-600); }
.tarjeta .contenido-tarjeta { padding: var(--space-4); flex-grow: 1; }
.tarjeta h3 { font-size: var(--text-xl); }
.tarjeta p { color: var(--color-text); font-size: var(--text-sm); margin-bottom: 0; }

.grid-servicios { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--space-5); }

/* ==========================================================================
   Grid de valores / diferenciadores (icono + texto)
   ========================================================================== */
.grid-valores { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--space-5); text-align: left; }
.item-valor { display: flex; gap: var(--space-3); align-items: flex-start; }
.icono-valor {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background-color: var(--color-accent-100);
    color: var(--color-accent-700);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
}
.item-valor h3 { font-size: var(--text-lg); margin-bottom: 4px; }
.item-valor p { font-size: var(--text-sm); margin: 0; }

/* ==========================================================================
   Banda oscura con foto (equipo / experiencia)
   ========================================================================== */
.banda-equipo { display: grid; grid-template-columns: 1.1fr 1fr; gap: var(--space-6); align-items: center; }
.banda-equipo .foto-equipo { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-xl); }
.banda-equipo .foto-equipo img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4/3; }
.banda-equipo p { font-size: var(--text-lg); color: var(--color-text-on-dark); }

/* ==========================================================================
   Franja de proceso ("Cómo trabajamos")
   ========================================================================== */
.grid-proceso { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: var(--space-4); counter-reset: paso; }
.paso-proceso {
    background: linear-gradient(160deg, var(--color-accent-600), var(--color-primary-800));
    color: var(--color-neutral-0);
    border-radius: var(--radius-lg);
    padding: var(--space-5) var(--space-4);
    position: relative;
    overflow: hidden;
}
.paso-proceso::before {
    counter-increment: paso;
    content: counter(paso);
    position: absolute;
    top: -10px;
    right: 4px;
    font-size: 72px;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.12);
    line-height: 1;
}
.paso-proceso h3 { color: var(--color-neutral-0); font-size: var(--text-lg); margin-bottom: 6px; }
.paso-proceso p { color: rgba(255, 255, 255, 0.85); font-size: var(--text-sm); margin: 0; }

/* ==========================================================================
   Experiencia (10+ años) — usado en trabajos.html
   ========================================================================== */
.seccion-experiencia { position: relative; max-width: 1000px; margin: var(--space-6) auto; padding: 0 var(--space-4); }
.img-experiencia-wrapper { border-radius: var(--radius-xl); overflow: hidden; height: 450px; box-shadow: var(--shadow-lg); }
.img-experiencia-wrapper img { width: 100%; height: 100%; object-fit: cover; }
.caja-experiencia {
    position: absolute;
    bottom: -40px;
    right: 60px;
    background: var(--color-bg-alt);
    padding: 30px 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 350px;
    text-align: left;
    z-index: 10;
    border-bottom: 4px solid var(--color-accent-600);
}
.caja-experiencia h2 { margin: 0 0 10px 0; font-size: 32px; display: flex; align-items: center; gap: 8px; }
.caja-experiencia h2 span { color: var(--color-accent-700); }
.caja-experiencia p { margin: 0; font-size: var(--text-base); }

/* ==========================================================================
   Clientes de confianza
   ========================================================================== */
.seccion-clientes { padding: 80px var(--space-4) 40px var(--space-4); text-align: center; max-width: 1000px; margin: 0 auto; }
.titulo-clientes { text-transform: uppercase; letter-spacing: 3px; color: var(--color-neutral-400); font-size: var(--text-lg); font-weight: 700; margin-bottom: var(--space-6); }
.grid-clientes-lista { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--space-4); }
.tarjeta-cliente {
    background: var(--color-bg-alt);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    text-align: left;
    transition: all var(--duration-base) ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.02);
}
.tarjeta-cliente:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: var(--color-accent-600); }
.tarjeta-cliente h3 { margin: 0 0 8px 0; font-size: 19px; color: var(--color-text-strong); }
.contacto-cliente { color: var(--color-accent-700); font-weight: 600; font-size: var(--text-sm); margin: 0 0 5px 0; }
.telefono-cliente { color: var(--color-text); font-size: var(--text-sm); margin: 0; display: flex; align-items: center; gap: 8px; }

/* ==========================================================================
   Galería dinámica
   ========================================================================== */
.grid-galeria { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--space-4); }
.item-galeria {
    background-color: #000;
    height: 260px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    cursor: zoom-in;
    box-shadow: var(--shadow-md);
    border: none;
    padding: 0;
    display: block;
    width: 100%;
}
.item-galeria img { width: 100%; height: 100%; object-fit: cover; opacity: 0.9; transition: opacity var(--duration-base) ease, transform var(--duration-base) ease; }
.item-galeria:hover img, .item-galeria:focus-visible img { opacity: 0.55; transform: scale(1.08); }
.item-galeria span {
    position: absolute; bottom: 18px; left: 18px; right: 18px;
    color: #fff; font-size: 17px; font-weight: bold; text-align: left;
    opacity: 0; transform: translateY(12px);
    transition: all var(--duration-base) ease;
    text-shadow: 1px 1px 4px rgba(0,0,0,0.9);
}
.item-galeria:hover span, .item-galeria:focus-visible span { opacity: 1; transform: translateY(0); }
.item-galeria:focus-visible { outline: 3px solid var(--color-accent-500); outline-offset: 2px; }

/* Lightbox */
.lightbox {
    position: fixed; inset: 0; background: rgba(10, 15, 30, 0.92);
    display: flex; align-items: center; justify-content: center;
    z-index: var(--z-overlay); padding: var(--space-4);
}
.lightbox[hidden] { display: none; }
.lightbox img { max-width: min(90vw, 1100px); max-height: 85vh; border-radius: var(--radius-md); box-shadow: var(--shadow-xl); }
.lightbox-cerrar {
    position: absolute; top: 20px; right: 24px;
    background: rgba(255,255,255,0.1); color: #fff; border: none;
    width: 44px; height: 44px; border-radius: var(--radius-full);
    font-size: 22px; cursor: pointer; transition: background var(--duration-fast) ease;
}
.lightbox-cerrar:hover { background: rgba(255,255,255,0.25); }
.lightbox-nav {
    position: absolute; top: 50%; transform: translateY(-50%);
    background: rgba(255,255,255,0.1); color: #fff; border: none;
    width: 48px; height: 48px; border-radius: var(--radius-full);
    font-size: 24px; cursor: pointer; transition: background var(--duration-fast) ease;
}
.lightbox-nav:hover { background: rgba(255,255,255,0.25); }
.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }
.lightbox-caption { position: absolute; bottom: 24px; left: 0; right: 0; text-align: center; color: #e2e8f0; font-size: var(--text-sm); }

/* ==========================================================================
   Estadísticas
   ========================================================================== */
.grid-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: var(--space-4); text-align: center; }
.stat-item { padding: var(--space-4); }
.stat-numero { font-size: var(--text-4xl); font-weight: 800; color: var(--color-accent-500); line-height: 1; }
.stat-label { font-size: var(--text-sm); color: var(--color-text-on-dark); text-transform: uppercase; letter-spacing: 0.05em; margin-top: 6px; }

/* ==========================================================================
   FAQ (acordeón)
   ========================================================================== */
.lista-faq { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: var(--space-2); }
.item-faq { background: var(--color-bg-alt); border: 1px solid var(--color-border); border-radius: var(--radius-md); overflow: hidden; }
.pregunta-faq {
    width: 100%; text-align: left; background: none; border: none; cursor: pointer;
    padding: var(--space-3) var(--space-4); font-size: var(--text-base); font-weight: 700; color: var(--color-text-strong);
    display: flex; align-items: center; justify-content: space-between; gap: var(--space-3);
}
.pregunta-faq .icono-faq { flex-shrink: 0; transition: transform var(--duration-base) ease; color: var(--color-accent-600); }
.pregunta-faq[aria-expanded="true"] .icono-faq { transform: rotate(180deg); }
.respuesta-faq {
    max-height: 0; overflow: hidden; transition: max-height var(--duration-base) var(--ease-out);
}
.respuesta-faq p { padding: 0 var(--space-4) var(--space-3) var(--space-4); margin: 0; font-size: var(--text-sm); }

/* ==========================================================================
   CTA final de página
   ========================================================================== */
.cta-final {
    background-color: var(--color-accent-600);
    color: var(--color-neutral-0);
    text-align: center;
}
.cta-final h2 { color: var(--color-neutral-0); }
.cta-final p { font-size: var(--text-lg); margin-bottom: var(--space-4); }

/* ==========================================================================
   Formulario de contacto
   ========================================================================== */
.contacto-contenedor { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); text-align: left; }

.info-contacto { background: var(--color-bg-alt); padding: var(--space-5); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); border-top: 4px solid var(--color-accent-600); height: fit-content; }
.info-contacto h3 { margin-top: 0; margin-bottom: var(--space-3); }
.info-item { display: flex; align-items: flex-start; margin-bottom: var(--space-4); }
.info-icono { font-size: 24px; margin-right: var(--space-2); color: var(--color-accent-600); }
.info-texto h4 { margin: 0 0 5px 0; color: var(--color-text-strong); }
.info-texto p, .info-texto a { margin: 0; color: var(--color-text); text-decoration: none; }
.info-texto a:hover { color: var(--color-accent-700); text-decoration: underline; }

.formulario-contacto { background: var(--color-bg-alt); padding: var(--space-5); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); border-top: 4px solid var(--color-primary-900); }
.form-group { margin-bottom: var(--space-3); }
.form-group label { display: block; margin-bottom: 8px; font-weight: 600; color: var(--color-text-strong); }
.form-group .campo-obligatorio { color: var(--color-accent-700); }
.form-group input, .form-group textarea, .form-group select {
    width: 100%; padding: 12px 15px; border: 1px solid var(--color-neutral-300); border-radius: var(--radius-sm);
    font-family: inherit; font-size: 16px; box-sizing: border-box; transition: border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline: none; border-color: var(--color-accent-600); box-shadow: 0 0 0 3px rgba(24, 152, 163, 0.25);
}
.form-group input[aria-invalid="true"], .form-group textarea[aria-invalid="true"] {
    border-color: #dc2626; box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.15);
}
.form-group textarea { resize: vertical; height: 120px; }
.error-campo { color: #b91c1c; font-size: var(--text-xs); margin-top: 6px; display: none; }
.error-campo.visible { display: block; }

.btn-enviar {
    background-color: var(--color-accent-600); color: var(--color-neutral-0); border: none;
    padding: 15px 30px; font-size: var(--text-lg); font-weight: bold; border-radius: var(--radius-sm);
    cursor: pointer; width: 100%; transition: background-color var(--duration-base) ease, transform var(--duration-fast) ease;
}
.btn-enviar:hover { background-color: var(--color-accent-700); transform: translateY(-2px); }
.btn-enviar:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.mensaje-envio { padding: var(--space-3); border-radius: var(--radius-sm); font-weight: 600; margin-top: var(--space-3); }
.mensaje-envio.exito { background-color: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.mensaje-envio.error { background-color: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }

/* ==========================================================================
   Botón flotante y footer
   ========================================================================== */
.whatsapp-flotante {
    position: fixed;
    width: 60px; height: 60px;
    bottom: calc(40px + env(safe-area-inset-bottom, 0px));
    right: calc(40px + env(safe-area-inset-right, 0px));
    background-color: var(--color-success-500);
    color: #FFF;
    border-radius: var(--radius-full);
    display: flex; align-items: center; justify-content: center;
    box-shadow: var(--shadow-lg);
    z-index: var(--z-floating);
    transition: transform var(--duration-base) ease;
}
.whatsapp-flotante:hover { transform: scale(1.15) rotate(5deg); }

footer { background-color: var(--color-primary-900); color: var(--color-text-on-dark); padding: var(--space-7) var(--space-4) var(--space-5) var(--space-4); }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: var(--space-6); max-width: var(--container-max); margin: 0 auto; text-align: left; }
.footer-marca .logo-texto { color: var(--color-neutral-0); }
.footer-marca p { color: var(--color-text-on-dark); font-size: var(--text-sm); margin-top: var(--space-2); }
footer h3 { color: var(--color-neutral-0); font-size: var(--text-base); margin-bottom: var(--space-3); }
.footer-links { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
footer a { color: var(--color-text-on-dark); text-decoration: none; transition: color var(--duration-fast) ease; }
footer a:hover { color: var(--color-neutral-0); }
.footer-bottom {
    max-width: var(--container-max); margin: var(--space-6) auto 0 auto; padding-top: var(--space-4);
    border-top: 1px solid rgba(255,255,255,0.1); text-align: center; font-size: var(--text-xs); color: var(--color-neutral-400);
}

/* ==========================================================================
   Utilidades de animación (scroll reveal)
   ========================================================================== */
.fade-in { opacity: 0; transform: translateY(30px); transition: opacity var(--duration-slow) var(--ease-out), transform var(--duration-slow) var(--ease-out); }
.fade-in.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
    .fade-in { opacity: 1; transform: none; transition: none; }
    .whatsapp-flotante:hover { transform: none; }
}

/* ==========================================================================
   Responsividad
   ========================================================================== */
@media (max-width: 960px) {
    .banda-equipo { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    header { padding: 15px 20px; }
    .menu-toggle { display: block; }
    .nav-links {
        display: none; flex-direction: column; position: absolute; top: 100%; left: 0; width: 100%;
        background-color: var(--color-bg-alt); padding: 20px 0; box-shadow: var(--shadow-md);
    }
    .nav-links.active { display: flex; }
    .nav-links a { padding: 10px 20px; text-align: center; border-bottom: 1px solid var(--color-neutral-100); margin: 0; }
    .whatsapp-flotante { bottom: calc(20px + env(safe-area-inset-bottom, 0px)); right: calc(20px + env(safe-area-inset-right, 0px)); }
    .caja-experiencia { right: 20px; left: 20px; bottom: -60px; max-width: none; text-align: center; }
    .caja-experiencia h2 { justify-content: center; }
    .seccion-clientes { padding-top: 120px; }
    .contacto-contenedor { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: var(--space-5); text-align: center; }
    .item-valor { flex-direction: column; align-items: center; text-align: center; }
    h1 { font-size: var(--text-3xl); }
    .banner-interno h1 { font-size: var(--text-3xl); }
}

@media (min-width: 1600px) {
    :root { --container-max: 1360px; }
    .seccion { padding: var(--space-8) var(--space-4); }
}