/* =========================================================
   CosasÚtiles.cl — Estilos base
   Paleta:
     --azul:        #0F2C3D   (azul profundo)
     --verde:       #7DBA6D   (verde fresco)
     --gris-claro:  #F2F2F2
     --gris-medio:  #8C8C8C
     --gris-oscuro: #3A3A3A
   Tipografía: Manrope (Google Fonts)
   ========================================================= */

:root {
  --azul: #0F2C3D;
  --azul-soft: #173b52;
  --verde: #7DBA6D;
  --verde-dark: #69a45a;
  --gris-claro: #F2F2F2;
  --gris-medio: #8C8C8C;
  --gris-oscuro: #3A3A3A;
  --blanco: #ffffff;
  --texto: #1c1c1c;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 2px rgba(15, 44, 61, 0.06), 0 2px 8px rgba(15, 44, 61, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 44, 61, 0.08), 0 8px 24px rgba(15, 44, 61, 0.06);
  --max: 1140px;
  --transition: 200ms ease;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Manrope', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--texto);
  background: var(--blanco);
  -webkit-font-smoothing: antialiased;
  letter-spacing: -0.01em;
}

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

a {
  color: var(--azul);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--verde-dark); }

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

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.hidden-field { display: none; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  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-claro);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: inline-flex;
  align-items: center;
}
.logo img {
  height: 36px;
  width: auto;
  display: block;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav a {
  color: var(--gris-oscuro);
  font-weight: 600;
  font-size: 15px;
}
.nav a:hover { color: var(--azul); }
.nav-cta {
  padding: 9px 16px;
  background: var(--azul);
  color: var(--blanco) !important;
  border-radius: 999px;
}
.nav-cta:hover { background: var(--azul-soft); }

@media (max-width: 720px) {
  .nav { gap: 14px; }
  .nav a:not(.nav-cta) { display: none; }
  .logo img { height: 30px; }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 22px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  border: none;
  cursor: pointer;
  font-family: inherit;
  letter-spacing: -0.01em;
  transition: transform var(--transition), background var(--transition), color var(--transition), box-shadow var(--transition);
}
.btn-primary {
  background: var(--verde);
  color: var(--azul);
}
.btn-primary:hover {
  background: var(--verde-dark);
  color: var(--azul);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-ghost {
  background: transparent;
  color: var(--azul);
  border: 1px solid #d6d9dc;
}
.btn-ghost:hover { border-color: var(--azul); }

/* ===== Hero ===== */
.hero {
  background:
    radial-gradient(1100px 500px at 20% -10%, rgba(125,186,109,0.18), transparent 60%),
    radial-gradient(900px 500px at 90% 10%, rgba(15,44,61,0.07), transparent 60%),
    var(--blanco);
  padding: 80px 0 90px;
}

.hero-inner {
  text-align: center;
  max-width: 820px;
}

.badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(125,186,109,0.18);
  color: var(--verde-dark);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 22px;
}

.hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  line-height: 1.05;
  margin: 0 0 22px;
  color: var(--azul);
  letter-spacing: -0.035em;
  font-weight: 800;
}
.hero h1 .accent { color: var(--verde-dark); }

.lead {
  font-size: clamp(1rem, 1.5vw, 1.18rem);
  color: var(--gris-oscuro);
  margin: 0 auto 32px;
  max-width: 640px;
  font-weight: 500;
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.hero-trust {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: center;
  color: var(--gris-oscuro);
  font-size: 14px;
  font-weight: 500;
}

/* ===== Sections ===== */
.section {
  padding: 80px 0;
}
.section-alt {
  background: var(--gris-claro);
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 50px;
}
.section-head h2 {
  font-size: clamp(1.6rem, 2.8vw, 2.2rem);
  color: var(--azul);
  margin: 0 0 10px;
  letter-spacing: -0.03em;
  font-weight: 800;
}
.section-head p {
  margin: 0;
  color: var(--gris-oscuro);
  font-weight: 500;
}

/* ===== Grids ===== */
.grid {
  display: grid;
  gap: 22px;
}
.grid-categorias {
  grid-template-columns: repeat(3, 1fr);
}
.grid-productos {
  grid-template-columns: repeat(3, 1fr);
}
@media (max-width: 900px) {
  .grid-categorias, .grid-productos {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 560px) {
  .grid-categorias, .grid-productos {
    grid-template-columns: 1fr;
  }
}

/* ===== Cards ===== */
.card {
  background: var(--blanco);
  border: 1px solid var(--gris-claro);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.categoria h3 {
  margin: 14px 0 6px;
  color: var(--azul);
  font-size: 1.05rem;
  font-weight: 700;
}
.categoria p {
  margin: 0;
  color: var(--gris-oscuro);
  font-size: 14.5px;
}
.categoria-icon {
  width: 52px; height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gris-claro);
  border-radius: 12px;
  font-size: 26px;
}

/* ===== Productos ===== */
.producto { padding: 0; overflow: hidden; }
.producto-img {
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 84px;
  color: var(--azul);
  position: relative;
  overflow: hidden;
}
.producto-emoji {
  position: relative;
  z-index: 2;
  filter: drop-shadow(0 4px 12px rgba(15,44,61,0.15));
}
/* Fondos diferenciados por producto (paleta de marca) */
.producto-img-1 { background: linear-gradient(135deg, #fff5e6 0%, #ffd9a3 100%); }
.producto-img-2 { background: linear-gradient(135deg, #e8f0f5 0%, #b8cbd6 100%); }
.producto-img-3 { background: linear-gradient(135deg, #e9f5e3 0%, #b8dba6 100%); }
.producto-img-4 { background: linear-gradient(135deg, #fce8e8 0%, #f0b8b8 100%); }
.producto-img-5 { background: linear-gradient(135deg, #e6eef5 0%, #a5bccf 100%); }
.producto-img-6 { background: linear-gradient(135deg, #f0ecf5 0%, #c8bcd6 100%); }

.producto-body { padding: 22px 24px 26px; }
.producto-body h3 {
  margin: 8px 0 6px;
  color: var(--azul);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.producto-body p {
  margin: 0 0 14px;
  color: var(--gris-oscuro);
  font-size: 14.5px;
}
.producto-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--gris-claro);
}
.precio {
  color: var(--azul);
  font-weight: 700;
  font-size: 1rem;
}
.link-cta {
  color: var(--verde-dark);
  font-weight: 600;
  font-size: 14px;
}
.link-cta:hover { color: var(--azul); }

.tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(15,44,61,0.08);
  color: var(--azul);
  letter-spacing: 0.02em;
}

/* ===== Cómo funciona ===== */
.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  counter-reset: step;
}
@media (max-width: 900px) {
  .steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .steps { grid-template-columns: 1fr; }
}
.step {
  background: var(--blanco);
  border-radius: var(--radius);
  padding: 26px;
  border: 1px solid #e7e7e7;
}
.step-num {
  display: inline-block;
  font-weight: 800;
  color: var(--verde-dark);
  font-size: 14px;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}
.step h3 {
  margin: 0 0 6px;
  color: var(--azul);
  font-size: 1.05rem;
  font-weight: 700;
}
.step p {
  margin: 0;
  color: var(--gris-oscuro);
  font-size: 14.5px;
}

/* ===== CTA / Newsletter ===== */
.section-cta {
  background: var(--azul);
  color: var(--blanco);
}
.cta-inner {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 40px;
  align-items: center;
}
@media (max-width: 800px) {
  .cta-inner { grid-template-columns: 1fr; text-align: center; }
}
.cta-text h2 {
  margin: 0 0 10px;
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  color: var(--blanco);
  letter-spacing: -0.03em;
  font-weight: 800;
}
.cta-text p {
  margin: 0;
  color: #cdd6db;
}

.newsletter-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  position: relative;
}
.newsletter-form input[type="email"] {
  flex: 1 1 220px;
  padding: 14px 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-family: inherit;
  background: var(--blanco);
  color: var(--texto);
  outline: none;
}
.newsletter-form input[type="email"]:focus {
  border-color: var(--verde);
  box-shadow: 0 0 0 3px rgba(125,186,109,0.35);
}
.form-msg {
  width: 100%;
  margin: 6px 0 0;
  font-size: 14px;
  color: var(--verde);
  min-height: 20px;
}

/* ===== Footer ===== */
.site-footer {
  background: #0b2230;
  color: #cdd6db;
  padding: 60px 0 24px;
  margin-top: 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 40px;
}
@media (max-width: 800px) {
  .footer-inner { grid-template-columns: 1fr; }
}
.footer-brand .logo img { height: 36px; }
.footer-brand p { margin: 14px 0 0; color: #9aacb6; max-width: 320px; }

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
@media (max-width: 560px) {
  .footer-cols { grid-template-columns: 1fr 1fr; }
}
.footer-cols h4 {
  color: var(--blanco);
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
}
.footer-cols ul { list-style: none; padding: 0; margin: 0; }
.footer-cols li { margin-bottom: 8px; }
.footer-cols a { color: #cdd6db; font-size: 14.5px; }
.footer-cols a:hover { color: var(--verde); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  margin-top: 36px;
  padding-top: 20px;
  font-size: 13px;
  color: #8ea0a9;
}
.footer-bottom p { margin: 0; }

/* ===== WhatsApp FAB ===== */
.whatsapp-fab {
  position: fixed;
  bottom: 22px;
  right: 22px;
  z-index: 100;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px 12px 14px;
  background: #25D366;
  color: var(--blanco) !important;
  border-radius: 999px;
  font-weight: 700;
  font-size: 14px;
  box-shadow: 0 8px 24px rgba(37,211,102,0.4);
  transition: transform var(--transition), box-shadow var(--transition);
}
.whatsapp-fab:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(37,211,102,0.5);
}
@media (max-width: 480px) {
  .whatsapp-fab span { display: none; }
  .whatsapp-fab { padding: 14px; }
}

/* ===== Legal pages ===== */
.legal-page {
  max-width: 760px;
  margin: 0 auto;
  padding: 60px 24px 80px;
}
.legal-page h1 {
  color: var(--azul);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  letter-spacing: -0.03em;
  margin: 0 0 8px;
}
.legal-page .updated {
  color: var(--gris-medio);
  font-size: 14px;
  margin: 0 0 32px;
}
.legal-page h2 {
  color: var(--azul);
  margin-top: 36px;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}
.legal-page h3 {
  color: var(--azul);
  margin-top: 24px;
  font-size: 1.05rem;
}
.legal-page p, .legal-page li {
  color: var(--gris-oscuro);
  line-height: 1.7;
}
.legal-page ul, .legal-page ol {
  padding-left: 22px;
}