:root {
    /* Paleta de colores oscuros de alta gama */
    --bg-dark: #070913;
    --bg-card: rgba(20, 24, 40, 0.4);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    
    /* Colores de acento para cada app */
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --accent-teal: #14b8a6;
    
    /* Variables de UI */
    --font-family: 'Outfit', sans-serif;
    --radius-lg: 24px;
    --radius-md: 16px;
    --transition: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    position: relative;
    line-height: 1.5;
}

/* Efectos de fondo sutiles */
.background-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.15;
}

.glow-1 {
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: var(--accent-blue);
}

.glow-2 {
    bottom: -20%;
    right: -10%;
    width: 60vw;
    height: 60vw;
    background: var(--accent-purple);
}

.glow-3 {
    top: 40%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40vw;
    height: 40vw;
    background: var(--accent-teal);
    opacity: 0.08;
}

/* Contenedor principal */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem 6rem;
    width: 100%;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Navbar / Brand Logo */
.navbar {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 4rem;
    animation: fadeInDown 0.8s ease-out;
}

.brand-logo {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -1px;
    background: linear-gradient(135deg, #ffffff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
    padding-bottom: 0.5rem;
}

.brand-logo::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 3px;
    background: var(--accent-blue);
    border-radius: 2px;
}

/* Cabecera */
.header {
    text-align: center;
    margin-bottom: 5rem;
    animation: fadeInDown 1s ease-out;
}

.title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #fff 0%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    font-weight: 400;
    max-width: 600px;
    margin: 0 auto;
}

/* Grid de tarjetas */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    perspective: 1000px;
}

/* Estilo de las tarjetas */
.card {
    position: relative;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: var(--transition);
    transform-style: preserve-3d;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    animation: fadeInUp 0.8s ease-out both;
}

.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.2s; }
.card:nth-child(3) { animation-delay: 0.3s; }

/* Efecto Hover Refinado */
.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 255, 255, 0.2);
}

.card-border {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.5), transparent);
    opacity: 0;
    transition: var(--transition);
}

.card:hover .card-border {
    opacity: 1;
}

.card:nth-child(1) .card-border { background: linear-gradient(90deg, transparent, var(--accent-blue), transparent); }
.card:nth-child(2) .card-border { background: linear-gradient(90deg, transparent, var(--accent-purple), transparent); }
.card:nth-child(3) .card-border { background: linear-gradient(90deg, transparent, var(--accent-teal), transparent); }

.card-content {
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
    z-index: 2;
}

/* Iconos y Logos */
.logo-wrapper {
    min-height: 250px; /* Mucho más grande para alojar logos gigantes */
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    transition: var(--transition);
    background: transparent;
}

.card:hover .logo-wrapper {
    transform: scale(1.1); /* Efecto hover para que crezcan aún más */
}

/* Imágenes de Logos */
.app-logo {
    width: 130%; /* Todavía más gigantes para que inunden la tarjeta */
    max-height: 350px;
    object-fit: contain;
    /* Sin ningún resplandor blanco ni fondo, 100% transparente */
}

/* Textos de la tarjeta */
.card-text {
    flex-grow: 1;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    transition: var(--transition);
}

.card-desc {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 2rem;
}

/* Acción de la tarjeta (Flecha) */
.card-action {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-muted);
    transition: var(--transition);
    margin-top: auto;
}

.card-action i {
    font-size: 0.85rem;
    transition: var(--transition);
}

.card:hover .card-action {
    color: var(--text-main);
}

.card:nth-child(1):hover .card-action { color: var(--accent-blue); }
.card:nth-child(2):hover .card-action { color: var(--accent-purple); }
.card:nth-child(3):hover .card-action { color: var(--accent-teal); }

.card:hover .card-action i {
    transform: translateX(6px);
}

/* Tracking Glow (Efecto interactivo del ratón manejado por JS) */
.card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(800px circle at var(--mouse-x) var(--mouse-y), rgba(255,255,255,0.06), transparent 40%);
    opacity: 0;
    transition: opacity 0.5s;
    z-index: 1;
    pointer-events: none;
}

.card:hover::before {
    opacity: 1;
}

/* Animaciones */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .title {
        font-size: 2.25rem;
    }
    
    .subtitle {
        font-size: 1.1rem;
    }
    
    .container {
        padding: 4rem 1.5rem;
    }
    
    .cards-grid {
        gap: 1.5rem;
    }
}