/* CSS con tema futurista/IA (fondo oscuro, acentos neón) */
:root {
  --pk-primary: #8b5cf6; --pk-primary-dark: #7c3aed; --pk-whatsapp: #25D366; --pk-whatsapp-dark: #128C7E;
  --pk-dark: #020617; --pk-accent: #a855f7; --pk-text: #e2e8f0; --pk-text-light: #94a3b8;
  --pk-bg: #020617; --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(139,92,246,0.3); --shadow-premium: 0 25px 50px -12px rgba(0,0,0,0.8);
}
*, *::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-white); 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); }
.container { width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 1.5rem; }
.header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background: rgba(2, 6, 23, 0.9); backdrop-filter: blur(16px); border-bottom: 1px solid rgba(139,92,246,0.3); 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-white); display: flex; align-items: center; gap: 0.5rem; }
.logo span { color: var(--pk-primary); }
.logo::before { content: ''; width: 28px; height: 28px; border-radius: 8px; background: linear-gradient(135deg, var(--pk-primary), var(--pk-accent)); box-shadow: 0 4px 12px rgba(139, 92, 246, 0.5); }
.nav-links { display: flex; gap: 2.5rem; list-style: none; }
.nav-link { font-weight: 500; font-size: 0.95rem; color: var(--pk-text-light); 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-white); }
.nav-link:hover::after { width: 100%; }
.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(139, 92, 246, 0.4); }
.btn-primary:hover { background: var(--pk-primary-dark); transform: translateY(-2px); }
.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(226,232,240,0.3); color: var(--pk-text); background: rgba(2,6,23,0.8); }
.btn-outline-light:hover { border-color: var(--pk-primary); color: var(--pk-white); background: rgba(2,6,23,0.9); }
.hero-inner { padding: 10rem 0 6rem; background: radial-gradient(circle at 20% 0, rgba(139,92,246,0.3) 0%, transparent 45%), radial-gradient(circle at 80% 100%, rgba(168,85,247,0.25) 0%, transparent 50%), #020617; color: var(--pk-white); text-align: center; position: relative; overflow: hidden; }
.hero-inner h1 { color: var(--pk-white); font-size: clamp(2.5rem, 5vw, 4rem); margin-bottom: 1.5rem; position: relative; font-weight: 800; }
.hero-inner h1 span { background: linear-gradient(135deg, #a855f7, #818cf8, #e879f9); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-inner p { color: #cbd5e1; font-size: clamp(1.1rem, 2vw, 1.25rem); max-width: 700px; margin: 0 auto; position: relative; }
.section { padding: 6rem 0; background: var(--pk-bg); }
.section-alt { background: var(--pk-bg); }
.section-title { text-align: center; font-size: clamp(2rem, 4vw, 2.8rem); margin-bottom: 1rem; font-weight: 800; color: var(--pk-white); }
.section-subtitle { text-align: center; color: var(--pk-text-light); max-width: 700px; margin: 0 auto 4rem; font-size: 1.15rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.card { background: rgba(30,41,59,0.8); border-radius: var(--radius-lg); padding: 2.5rem; border: 1px solid rgba(139,92,246,0.2); transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1); box-shadow: 0 10px 30px -15px rgba(2,6,23,0.8); }
.card:hover { transform: translateY(-8px); box-shadow: var(--shadow-float); border-color: rgba(139, 92, 246, 0.5); }
.card h3 { font-size: 1.4rem; margin-bottom: 1rem; color: var(--pk-white); }
.card p { color: var(--pk-text-light); margin-bottom: 1.5rem; }
.footer { background: var(--pk-bg); color: var(--pk-text); padding: 5rem 0 2rem; border-top: 1px solid rgba(139,92,246,0.3); }
.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; }
.footer ul { list-style: none; }
.footer li { margin-bottom: 0.85rem; color: #cbd5e1; font-size: 0.95rem; }
.footer a { color: #e2e8f0; }
.footer a:hover { color: var(--pk-primary); }
.footer-desc { color: #cbd5e1; font-size: 0.95rem; line-height: 1.7; margin-bottom: 1rem; }
.copyright { border-top: 1px solid rgba(139,92,246,0.3); padding-top: 2rem; text-align: center; color: #94a3b8; font-size: 0.875rem; }
.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, 0.5); display: flex; align-items: center; justify-content: center; color: var(--pk-white); font-size: 1.4rem; transition: all 0.3s ease; }
.whatsapp-fab a:hover { transform: translateY(-3px) scale(1.05); }
.nav-toggle { display: none; width: 44px; height: 44px; border: 1px solid rgba(139,92,246,0.4); background: rgba(2,6,23,0.9); border-radius: 12px; cursor: pointer; flex-direction: column; justify-content: center; gap: 5px; padding: 8px; }
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--pk-white); border-radius: 2px; transition: 0.3s; }
@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(2, 6, 23, 0.95); backdrop-filter: blur(16px); padding: 1.5rem; border-bottom: 1px solid rgba(139,92,246,0.4); gap: 1rem; border-radius: 0 0 16px 16px; } .nav-links.is-open { display: flex; } .hero-inner { padding: 8rem 0 4rem; } .section { padding: 4rem 0; } }