:root {
  /* Paleta Premium 2026 */
  --pk-primary: #0ea5e9;       
  --pk-primary-dark: #0284c7;
  --pk-whatsapp: #25D366;
  --pk-whatsapp-dark: #128C7E;
  --pk-dark: #0f172a;     
  --pk-dark-card: #1e293b;
  --pk-accent: #38bdf8;        
  --pk-text: #334155;          
  --pk-text-light: #64748b;    
  --pk-bg: #f8fafc;            
  --pk-white: #ffffff;
  
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Outfit', sans-serif;
  
  --radius-lg: 24px;
  --radius-md: 16px;
  
  --shadow-float: 0 20px 40px -15px rgba(0,0,0,0.08);
  --shadow-glow: 0 0 20px rgba(14, 165, 233, 0.3);
  --shadow-premium: 0 25px 50px -12px rgba(0,0,0,0.25);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font-sans);
  color: var(--pk-text);
  background-color: var(--pk-bg);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--pk-dark);
  line-height: 1.1;
  letter-spacing: -0.025em;
  font-weight: 700;
}

a { text-decoration: none; color: inherit; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }

.container { 
  width: 100%; 
  max-width: 1280px; 
  margin: 0 auto; 
  padding: 0 1.5rem; 
}

/* Header Premium con Glassmorphism */
.header {
  position: fixed; 
  top: 0; left: 0; width: 100%; 
  z-index: 1000;
  background: rgba(248, 250, 252, 0.85); 
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.05); 
  padding: 1rem 0;
  transition: all 0.3s ease;
}

.nav { display: flex; justify-content: space-between; align-items: center; }

.logo { 
  font-family: var(--font-heading); 
  font-weight: 800; 
  font-size: 1.5rem; 
  color: var(--pk-dark); 
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.logo span { color: var(--pk-primary); }

/* Logo icon */
.logo::before {
  content: '';
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--pk-primary), var(--pk-accent));
  box-shadow: 0 4px 8px rgba(14, 165, 233, 0.3);
}

.nav-links { display: flex; gap: 2.5rem; list-style: none; }
.nav-link { 
  font-weight: 500; 
  font-size: 0.95rem; 
  color: var(--pk-text); 
  position: relative;
  padding: 0.5rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--pk-primary);
  transition: width 0.3s ease;
  border-radius: 2px;
}

.nav-link:hover { color: var(--pk-primary); }
.nav-link:hover::after { width: 100%; }

/* Botones Premium */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.85rem 1.75rem; 
  border-radius: 50px;
  font-weight: 600; font-size: 0.95rem;
  cursor: pointer; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); 
  border: none;
  white-space: nowrap;
}

.btn-primary { 
  background: var(--pk-primary); 
  color: var(--pk-white); 
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
}
.btn-primary:hover { 
  background: var(--pk-primary-dark); 
  transform: translateY(-2px); 
  box-shadow: var(--shadow-glow); 
}

.btn-whatsapp { 
  background: var(--pk-whatsapp); 
  color: var(--pk-white); 
  box-shadow: 0 4px 12px rgba(37, 211, 102, 0.3);
}
.btn-whatsapp:hover { 
  background: var(--pk-whatsapp-dark); 
  transform: translateY(-2px); 
  box-shadow: 0 8px 20px rgba(37, 211, 102, 0.4); 
}

.btn-outline-light { 
  border: 1px solid rgba(255,255,255,0.3); 
  color: var(--pk-white); 
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(8px);
}
.btn-outline-light:hover { 
  background: var(--pk-white); 
  color: var(--pk-dark); 
  border-color: var(--pk-white);
}

.btn-outline-dark {
  border: 1px solid rgba(0,0,0,0.1);
  color: var(--pk-dark);
  background: rgba(255,255,255,0.8);
}
.btn-outline-dark:hover {
  border-color: var(--pk-primary);
  background: var(--pk-white);
  color: var(--pk-primary);
}

/* Hero Premium con Animación */
.hero { 
  padding: 10rem 0 6rem; 
  background: linear-gradient(-45deg, var(--pk-dark), #1e293b, #0f172a, #020617);
  background-size: 400% 400%;
  animation: gradientBG 15s ease infinite;
  color: var(--pk-white); 
  text-align: center; 
  position: relative;
  overflow: hidden;
}

@keyframes gradientBG {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.hero::before {
  content: ''; 
  position: absolute; 
  top: 0; left: 0; 
  width: 100%; height: 100%;
  background: radial-gradient(circle at 30% 20%, rgba(14,165,233,0.15) 0%, transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(56,189,248,0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero h1 { 
  color: var(--pk-white); 
  font-size: clamp(3rem, 6vw, 4.5rem); 
  margin-bottom: 1.5rem; 
  position: relative;
  font-weight: 800;
}

.hero h1 span { 
  background: linear-gradient(135deg, var(--pk-accent), #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p { 
  color: #cbd5e1; 
  font-size: clamp(1.1rem, 2vw, 1.25rem); 
  max-width: 700px; 
  margin: 0 auto 3rem; 
  position: relative;
}

/* Secciones */
.section { padding: 6rem 0; }
.section-alt { background: var(--pk-white); }

.section-title { 
  text-align: center; 
  font-size: clamp(2rem, 4vw, 2.8rem); 
  margin-bottom: 1rem; 
  font-weight: 800;
}

.section-subtitle { 
  text-align: center; 
  color: var(--pk-text-light); 
  max-width: 700px; 
  margin: 0 auto 4rem; 
  font-size: 1.15rem; 
}

/* Bento Grid Premium */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 2rem;
  auto-rows: minmax(280px, auto);
}

.bento-item {
  background: var(--pk-white);
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.03);
  position: relative;
  overflow: hidden;
}

.bento-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--pk-primary), var(--pk-accent));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.bento-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-float);
  border-color: rgba(14, 165, 233, 0.2);
}

.bento-item:hover::before {
  opacity: 1;
}

.bento-item h3 { font-size: 1.4rem; margin-bottom: 1rem; color: var(--pk-dark); }
.bento-item p { color: var(--pk-text-light); margin-bottom: 1.5rem; line-height: 1.6; }

.bento-link { 
  color: var(--pk-primary); 
  font-weight: 600; 
  display: inline-flex; 
  align-items: center; 
  gap: 0.5rem;
  margin-top: auto;
  font-size: 0.95rem;
}
.bento-link:hover { gap: 0.8rem; color: var(--pk-primary-dark); }

/* Posicionamiento Bento */
.bento-main { 
  grid-column: span 8; 
  background: linear-gradient(135deg, #f8fafc, #f1f5f9); 
  border: 1px solid rgba(14, 165, 233, 0.1);
}
.bento-side { grid-column: span 4; }
.bento-half-1 { grid-column: span 6; }
.bento-half-2 { grid-column: span 6; }
.bento-full { 
  grid-column: span 12; 
  background: var(--pk-dark); 
  color: var(--pk-white);
  text-align: center;
  align-items: center;
  background-image: radial-gradient(circle at 20% 80%, rgba(14,165,233,0.1) 0%, transparent 50%);
}
.bento-full h3 { color: var(--pk-white); font-size: 2rem; }
.bento-full p { color: #cbd5e1; max-width: 600px; margin: 0 auto 2rem; }

/* Portfolio Premium */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2.5rem;
}

.portfolio-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--pk-white);
  border: 1px solid rgba(0,0,0,0.06);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.03);
}

.portfolio-card:hover {
  box-shadow: var(--shadow-float);
  transform: translateY(-5px);
}

.portfolio-img-wrapper {
  overflow: hidden;
  aspect-ratio: 16/10;
  position: relative;
}

.portfolio-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.portfolio-card:hover .portfolio-img-wrapper img {
  transform: scale(1.08);
}

.portfolio-content { padding: 2rem; }
.portfolio-content .domain { 
  font-size: 0.8rem; 
  color: var(--pk-primary); 
  font-weight: 700; 
  text-transform: uppercase; 
  letter-spacing: 0.05em; 
  margin-bottom: 0.5rem; 
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(14, 165, 233, 0.1);
  border-radius: 20px;
}
.portfolio-content h3 { font-size: 1.3rem; margin-bottom: 0.75rem; }
.portfolio-content p { color: var(--pk-text-light); margin-bottom: 1.5rem; font-size: 0.95rem; line-height: 1.6; }

/* Lead Gen Banner Premium */
.leadgen-banner {
  background: var(--pk-dark);
  border-radius: var(--radius-lg); 
  padding: 4rem 3rem; 
  text-align: center;
  box-shadow: var(--shadow-premium);
  position: relative;
  overflow: hidden;
  background-image: 
    radial-gradient(circle at 20% 20%, rgba(14,165,233,0.2) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(56,189,248,0.15) 0%, transparent 50%);
}

.leadgen-banner h2 { 
  color: var(--pk-white); 
  font-size: clamp(1.8rem, 4vw, 2.5rem); 
  margin-bottom: 1.5rem; 
  font-weight: 800;
}
.leadgen-banner p { 
  color: #cbd5e1; 
  font-size: 1.1rem; 
  max-width: 650px; 
  margin: 0 auto 2.5rem; 
  line-height: 1.6;
}

/* Footer Premium */
.footer { 
  background: var(--pk-dark); 
  color: var(--pk-white); 
  padding: 5rem 0 2rem; 
}
.footer-grid { 
  display: grid; 
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); 
  gap: 4rem; 
  margin-bottom: 4rem; 
}
.footer h3 { 
  color: var(--pk-white); 
  margin-bottom: 1.5rem; 
  font-size: 1.1rem; 
  font-weight: 700;
}
.footer ul { list-style: none; }
.footer li { margin-bottom: 0.85rem; color: #cbd5e1; font-size: 0.95rem; }
.footer a { color: #cbd5e1; }
.footer a:hover { color: var(--pk-white); }
.footer-desc { color: #cbd5e1; font-size: 0.95rem; line-height: 1.7; margin-bottom: 1rem; }
.copyright { 
  border-top: 1px solid rgba(255,255,255,0.1); 
  padding-top: 2rem; 
  text-align: center; 
  color: #94a3b8; 
  font-size: 0.875rem; 
}

/* Menú Móvil */
.nav-toggle {
  display: none; 
  width: 44px; height: 44px; 
  border: 1px solid rgba(0,0,0,0.1); 
  background: var(--pk-white);
  border-radius: 12px;
  cursor: pointer; 
  flex-direction: column; 
  justify-content: center; 
  gap: 5px; 
  padding: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}
.nav-toggle span { 
  display: block; 
  width: 20px; 
  height: 2px; 
  background: var(--pk-dark); 
  border-radius: 2px; 
  transition: 0.3s; 
}

/* Responsive */
@media (max-width: 992px) {
  .bento-main, .bento-side, .bento-half-1, .bento-half-2 { grid-column: span 12; }
  .bento-grid { gap: 1.5rem; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links {
    display: none; 
    position: absolute; 
    top: 100%; 
    left: 0; right: 0;
    flex-direction: column; 
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px); 
    padding: 1.5rem; 
    border-bottom: 1px solid rgba(0,0,0,0.05);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1); 
    gap: 1rem;
    border-radius: 0 0 16px 16px;
  }
  .nav-links.is-open { display: flex; }
  .leadgen-banner { padding: 3rem 1.5rem; }
  .hero { padding: 8rem 0 5rem; }
  .section { padding: 4rem 0; }
}

/* WhatsApp FAB */
.whatsapp-fab {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 50;
}

.whatsapp-fab a {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--pk-whatsapp);
  box-shadow: 0 8px 24px rgba(37, 211, 102, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--pk-white);
  font-weight: 700;
  font-size: 1.4rem;
  transition: all 0.3s ease;
}

.whatsapp-fab a:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 12px 32px rgba(37, 211, 102, 0.5);
}

/* Utilidades */
.text-center { text-align: center; }
.skip-link { position:absolute; left:-9999px; width:1px; height:1px; overflow:hidden; }
.skip-link:focus { 
  left:1rem; top:1rem; width:auto; height:auto; 
  padding:1rem; background: var(--pk-white); color: var(--pk-dark); 
  z-index:10000; border-radius: var(--radius-md); 
  box-shadow: var(--shadow-float);
}


/* FAQ blocks */

.faq-list{display:grid;gap:1.25rem;margin-top:2rem}
.faq-item{background:var(--pk-white);border:1px solid rgba(15,23,42,.08);border-radius:18px;padding:1.35rem 1.5rem;box-shadow:0 8px 24px rgba(15,23,42,.05)}
.faq-item h3{margin-bottom:.55rem;font-size:1.1rem}
.faq-item p{color:var(--pk-text-light);margin:0}