:root {
    --azul-oscuro: #1E3A8A;
    --amarillo: #FBBF24;
    --blanco: #FFFFFF;
    --gris-frio: #F1F5F9;
    --espaciado: 100px;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Barlow', sans-serif; }
body { background-color: var(--blanco); color: #334155; line-height: 1.8; scroll-behavior: smooth; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 40px; }
.section-spaced { padding: var(--espaciado) 0; }
.bg-grey { background-color: var(--gris-frio); }
.bg-blue { background: var(--azul-oscuro); }
.flex-center { display: flex; flex-direction: column; align-items: center; text-align: center; }

/* navegacion */
header { background: var(--blanco); border-bottom: 1px solid #e2e8f0; padding: 20px 0; position: fixed; width: 100%; top: 0; z-index: 1000; }
.nav-centered { display: flex; justify-content: space-between; align-items: center; max-width: 1100px; margin: 0 auto; padding: 0 20px; }
.logo-container { display: flex; align-items: center; gap: 12px; }
.logo-nav { height: 40px; }
.logo-text { font-weight: 700; font-size: 1.5rem; color: var(--azul-oscuro); }
nav ul { display: flex; list-style: none; gap: 25px; }
nav ul li a { text-decoration: none; color: var(--azul-oscuro); font-weight: 600; transition: color 0.3s; }
nav ul li a:hover { color: var(--amarillo); }

/* hero split logo y qr grandes a la derecha */
.hero { padding: 220px 0 120px; }
.hero-split { display: flex; align-items: center; justify-content: space-between; gap: 50px; }
.hero-text-side { flex: 1; text-align: left; }
.hero-visual-side { flex: 0 0 auto; display: flex; flex-direction: column; align-items: center; }
.visual-wrapper { display: flex; gap: 30px; align-items: center; background: white; padding: 30px; border-radius: 25px; box-shadow: 0 20px 40px rgba(0,0,0,0.07); }
.img-big { height: 200px; width: auto; display: block; }
.qr-hint { margin-top: 15px; font-weight: 700; color: var(--azul-oscuro); font-size: 1rem; }

.tagline { color: var(--azul-oscuro); font-weight: 700; text-transform: uppercase; letter-spacing: 2px; font-size: 0.9rem; margin-bottom: 15px; }
.hero h1 { font-size: 3.5rem; color: var(--azul-oscuro); margin-bottom: 20px; line-height: 1.1; }
.hero-desc { font-size: 1.25rem; color: #64748b; margin-bottom: 40px; max-width: 500px; }

.btn { background: var(--azul-oscuro); color: white; padding: 16px 35px; border-radius: 10px; text-decoration: none; font-weight: 700; transition: all 0.3s; display: inline-block; }
.btn:hover { transform: translateY(-3px); box-shadow: 0 10px 20px rgba(30, 58, 138, 0.2); }

/* grids y cards */
.section-title { text-align: center; margin-bottom: 60px; font-size: 2.6rem; color: var(--azul-oscuro); }
.text-white { color: white !important; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 40px; }
.card { background: var(--blanco); padding: 50px; border-radius: 20px; text-align: center; box-shadow: 0 5px 15px rgba(0,0,0,0.02); }
.card-icon { height: 70px; margin-bottom: 25px; }
.highlight { border: 2px solid var(--amarillo); }

/* arquitectura correccion de colores */
.tech-grid-main { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; text-align: center; }
.tech-item h3 { color: var(--amarillo); font-size: 1.9rem; margin-bottom: 15px; }
.tech-item p { font-size: 1.1rem; opacity: 1; } 

/* pagos */
.bundle-card { max-width: 550px; padding: 60px 40px; }
.bundle-header { display: flex; align-items: center; justify-content: center; gap: 15px; margin-bottom: 20px; }
.card-icon-small { height: 40px; }
.tagline-yellow { background: #FEF3C7; color: #92400E; padding: 6px 15px; border-radius: 50px; font-size: 0.8rem; font-weight: 700; text-transform: uppercase; }
.bundle-list { text-align: left; max-width: 320px; margin: 25px auto; color: #64748b; }
.price-box { margin: 30px 0; }
.old-price { text-decoration: line-through; color: #94a3b8; font-size: 1.2rem; }
.new-price { font-size: 3rem; font-weight: 700; color: var(--azul-oscuro); }
#wallet_container { margin-top: 20px; display: flex; justify-content: center; min-height: 48px; }

/* integrantes */
.team-container { text-align: center; }
.team-header { display: flex; flex-direction: column; align-items: center; gap: 15px; margin-bottom: 40px; }
.team-main-icon { height: 70px; }
.team-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 25px; }
.member { background: var(--blanco); padding: 35px 20px; border-radius: 15px; border-bottom: 5px solid var(--azul-oscuro); box-shadow: 0 5px 10px rgba(0,0,0,0.02); }

/* estilos de la seccion del producto fisico */
.product-split { display: flex; gap: 50px; align-items: center; margin-top: 40px; }
.product-gallery { flex: 1; position: relative; overflow: hidden; border-radius: 20px; box-shadow: 0 10px 30px rgba(0,0,0,0.08); background: var(--blanco); }
.slides { display: flex; transition: transform 0.4s ease-in-out; }
.slide { min-width: 100%; }
.slide img { width: 100%; display: block; object-fit: cover; aspect-ratio: 4/3; }

/* botones del carrusel */
.slider-btn { position: absolute; top: 50%; transform: translateY(-50%); background: var(--azul-oscuro); color: white; border: none; width: 45px; height: 45px; border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; opacity: 0.7; transition: all 0.3s; z-index: 2; }
.slider-btn:hover { opacity: 1; transform: translateY(-50%) scale(1.1); }
.prev-btn { left: 15px; }
.next-btn { right: 15px; }

/* informacion y lista de dispositivos */
.product-info { flex: 1; text-align: left; }
.product-price { font-size: 2.5rem; color: var(--azul-oscuro); font-weight: 700; margin: 15px 0; }
.device-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 25px; list-style: none; }
.device-list li { position: relative; padding-left: 28px; color: #475569; font-size: 1.05rem; }
.device-list li::before { content: '✓'; position: absolute; left: 0; color: var(--amarillo); font-weight: bold; font-size: 1.2rem; }

/* ajuste responsivo para que se apile en celulares */
@media (max-width: 992px) {
    .product-split { flex-direction: column; }
}

footer { text-align: center; padding: 50px; color: #94a3b8; border-top: 1px solid #f1f5f9; }

/* estilos del boton hamburguesa oculto en computadoras */
.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--azul-oscuro);
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* ajustes para pantallas medianas o tablets */
@media (max-width: 992px) {
    .hero-split { 
        flex-direction: column; 
        text-align: center; 
    }
    .hero-desc {
        margin: 0 auto 40px auto;
    }
    .hero-visual-side {
        margin-top: 40px;
    }
    .visual-wrapper { 
        flex-direction: column; 
        gap: 20px; 
    }
    .hero h1 { 
        font-size: 2.8rem; 
    }
    .grid, .tech-grid-main, .team-grid { 
        grid-template-columns: 1fr; 
    }
}

/* ajustes para celulares y pantallas pequenas */
@media (max-width: 768px) {
    :root {
        --espaciado: 60px;
    }
    
    .container {
        padding: 0 20px;
    }

    /* navegacion movil */
    header {
        height: 80px; 
        display: flex;
        align-items: center;
    }

    .nav-centered {
        flex-direction: row; 
        justify-content: space-between;
        width: 100%;
    }
    
    .menu-toggle {
        display: flex; 
        z-index: 1100; 
        position: relative;
    }
    
    nav ul {
        display: none; 
        flex-direction: column;
        width: 100%;
        text-align: center;
        background-color: var(--blanco);
        position: fixed; 
        top: 80px; 
        left: 0;
        height: calc(100vh - 80px);
        padding-top: 40px;
        z-index: 1000;
        box-shadow: 0 10px 15px rgba(0,0,0,0.05);
        gap: 30px;
    }
    
    nav ul.active {
        display: flex; 
    }
    
    /* resto de ajustes moviles */
    .hero {
        padding: 160px 0 60px;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .img-big {
        height: 140px;
    }
    
    .section-title {
        font-size: 2rem;
        margin-bottom: 40px;
    }
    
    .card {
        padding: 30px;
    }
    
    .bundle-card {
        padding: 40px 20px;
    }
    
    .new-price {
        font-size: 2.4rem;
    }
    
    .team-grid {
        grid-template-columns: 1fr;
    }
}