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/* Landing visual upgrade for AguaTratamiento.com.mx */
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/* Integracion v3: paginas adicionales, banners premium y blog extendido */
.problem-hero{background:linear-gradient(120deg,rgba(3,31,52,.92),rgba(7,112,174,.76)),url('../images/agua-calidad-manos.webp') center/cover no-repeat;color:white;padding:96px 0}.problem-hero h1{color:white;font-size:clamp(38px,5vw,64px);max-width:900px}.problem-hero p{font-size:20px;color:#e8f8ff;max-width:760px}.problem-matrix{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}.problem-card{background:white;border-radius:24px;border:1px solid #e4edf3;overflow:hidden;box-shadow:0 14px 38px rgba(6,59,102,.09)}.problem-card img{height:190px;width:100%;object-fit:cover}.problem-card .pad{padding:24px}.problem-card ul{padding-left:20px}.solution-chip{display:inline-flex;margin:4px 4px 0 0;background:#e8f9fc;color:#075c88;border-radius:999px;padding:7px 10px;font-weight:800;font-size:13px}.banner-premium{position:relative;border-radius:32px;overflow:hidden;min-height:460px;display:flex;align-items:end;padding:42px;color:white;box-shadow:var(--shadow);background:#063b66}.banner-premium img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}.banner-premium:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(2,25,43,.92),rgba(6,85,135,.62),rgba(24,183,201,.08));z-index:1}.banner-premium>*{position:relative;z-index:2;max-width:780px}.banner-premium h2,.banner-premium h3{color:white}.blog-featured{display:grid;grid-template-columns:1.15fr .85fr;gap:26px;align-items:stretch}.blog-card{background:white;border:1px solid #e5eef4;border-radius:24px;overflow:hidden;box-shadow:0 12px 34px rgba(6,59,102,.07)}.blog-card img{height:210px;width:100%;object-fit:cover}.blog-card .pad{padding:24px}.blog-card.feature img{height:100%}.blog-card.feature{display:grid;grid-template-columns:.95fr 1.05fr}.tag{display:inline-flex;background:#e8f9fc;color:#075c88;border-radius:999px;padding:6px 10px;font-size:12px;font-weight:900;text-transform:uppercase;letter-spacing:.05em;margin-bottom:10px}.nav .menu a[href="/problemas-del-agua/"]{color:var(--blue2)}@media(max-width:900px){.problem-matrix,.blog-featured,.blog-card.feature{grid-template-columns:1fr}.problem-card img,.blog-card.feature img{height:220px}.banner-premium{min-height:390px;padding:28px}}