:root {
    --electric-blue: #2563EB;
    --pastel-blue: #93C5FD;
    --ice-grey: #F9FAFB;
    --navy-blue: #111827;
}

.bg-electric-blue {
    background-color: var(--electric-blue);
}

.cyber-brand {
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.3s;
}

@keyframes neon-ignition {
    0% {
        text-shadow: none;
        color: var(--electric-blue);
    }

    5% {
        text-shadow: 0 0 10px var(--electric-blue);
        color: var(--pastel-blue);
    }

    10% {
        text-shadow: none;
        color: var(--electric-blue);
    }

    15% {
        text-shadow: 0 0 20px var(--electric-blue), 0 0 40px var(--electric-blue);
        color: var(--pastel-blue);
    }

    20% {
        text-shadow: none;
        color: var(--electric-blue);
    }

    25%,
    100% {
        text-shadow: 0 0 5px #fff, 0 0 15px var(--electric-blue), 0 0 30px var(--electric-blue);
        color: var(--pastel-blue);
    }
}

.cyber-brand:hover .highlight {
    animation: neon-ignition 0.6s ease-out forwards;
}

.content.alpha {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.2);
}

.text-shadow-border {
    text-shadow:
        -1px -1px 0 #000,
        1px -1px 0 #000,
        -1px 1px 0 #000,
        1px 1px 0 #000;
}

/* Cards */
.card-icy {
    background-color: var(--ice-grey);
    border: 1px solid #E5E7EB !important;
    transition: transform 0.2s ease-in-out;
}

.card-icy:hover {
    transform: translateY(-5px);
    border-color: var(--electric-blue) !important;
}

.text-navy {
    color: var(--navy-blue);
}

.content.alpha {
    background: rgba(255, 255, 255, 0.2);

}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    margin: 0;
}

.main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.hero-section {
    width: 100vw;
    min-height: 100vh;
    background: url('../img/tech-bg.jpg') no-repeat center center;
    background-size: cover;
    position: relative;
    margin-top: 0;
}

/* Navegación: Texto bold y efecto de brillo en hover */
.navbar-nav .nav-link {
    font-weight: 700;
    transition: text-shadow 0.3s ease, color 0.3s ease;
}

.navbar-nav .nav-link:hover {
    color: #ffffff !important;
    text-shadow: 0 0 10px rgba(147, 197, 253, 0.8), 0 0 20px rgba(37, 99, 235, 0.4);
}

.navbar-nav .nav-link.active {
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.5);
}

img.preview {
    max-height: 50px;
    border-radius: 4px;
}