:root {
    --bg-900: #0c0f13; /* muy oscuro */
    --bg-800: #141922; /* oscuro */
    --steel-700: #2b3240; /* gris acero */
    --steel-500: #596174;
    --steel-300: #aab2c3;
    --silver: #cfd6e4; /* acento plateado */
    --white: #ffffff;
    --blue-steel: #7aa5ff; /* azul acero */
    --cyan: #6de2ff; /* cian frío */
    --grad-hero: radial-gradient(1200px 600px at 20% 20%, rgba(122,165,255,.25), transparent 60%), radial-gradient(900px 500px at 80% 30%, rgba(109,226,255,.18), transparent 60%), linear-gradient(180deg, #121722, #0c0f13);
}


html, body {
    background: var(--bg-900);
}

.bg-canvas {
    background: var(--bg-900);
}

.bg-nav {
    background: rgba(12,15,19,.6);
    backdrop-filter: saturate(120%) blur(8px);
}

.blur-outer {
    box-shadow: 0 1px 0 rgba(255,255,255,.05) inset, 0 10px 30px rgba(0,0,0,.35);
}

.brand {
    font-family: 'Orbitron', system-ui, sans-serif;
    letter-spacing: .06em;
}


/* Tipografía */
.title-hero {
    font-family: 'Orbitron', sans-serif;
    letter-spacing: .04em;
    text-transform: uppercase;
}

.section-title {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    letter-spacing: .02em;
}

body, p, li {
    font-family: 'Poppins', system-ui, sans-serif;
}

.text-gradient {
    background: linear-gradient(90deg, var(--silver), var(--blue-steel), var(--cyan));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.text-secondary {
    color: var(--steel-300) !important;
}


/* Hero */
.hero {
    background: var(--grad-hero);
    position: relative;
}

.mesh-bg {
    position: absolute;
    inset: -10%;
    background-image: repeating-linear-gradient(135deg, rgba(255,255,255,.04) 0 2px, transparent 2px 12px), radial-gradient(1000px 500px at 70% 60%, rgba(255,255,255,.06), transparent 60%);
    mask-image: radial-gradient(70% 60% at 50% 40%, black, transparent 70%);
}

.py-7 {
    padding-top: 6rem;
    padding-bottom: 6rem;
}


/* Cards metálicas */
.card-metal {
    border: 1px solid rgba(207,214,228,.25);
    background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
    box-shadow: inset 0 1px 0 rgba(255,255,255,.06), 0 10px 30px rgba(0,0,0,.35);
    border-radius: 16px;
}

    .card-metal .card-body {
        color: var(--white);
    }

.card-glass {
    border: 1px solid rgba(207,214,228,.25);
    background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
    border-radius: 20px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,.08), 0 20px 50px rgba(0,0,0,.45);
}


/* Botones neumorfismo metálico */
.btn-neumorph {
    color: var(--bg-900);
    background: linear-gradient(180deg, var(--silver), #aeb6c7);
    border: 1px solid rgba(255,255,255,.35);
    border-radius: 14px;
    box-shadow: 6px 6px 16px rgba(0,0,0,.35), -6px -6px 16px rgba(255,255,255,.08);
    transition: transform .2s ease, box-shadow .2s ease, filter .2s ease;
}

    .btn-neumorph:hover {
        transform: translateY(-1px);
        filter: brightness(1.05);
        box-shadow: 8px 10px 20px rgba(0,0,0,.45), -6px -6px 18px rgba(255,255,255,.10);
    }

.btn-outline-neumorph {
    color: var(--silver);
    background: transparent;
    border: 1px solid rgba(207,214,228,.4);
    border-radius: 14px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,.08);
}

    .btn-outline-neumorph:hover {
        background: rgba(255,255,255,.05);
        color: var(--white);
    }

.btn-cta {
    color: #0a0d12;
    background: linear-gradient(180deg, #d9e0ef, #b9c2d7);
    border: 1px solid rgba(255,255,255,.45);
    border-radius: 12px;
    padding: .9rem 1.2rem;
    box-shadow: inset 0 1px 0 rgba(255,255,255,.6), 0 12px 28px rgba(0,0,0,.45);
}

    .btn-cta:hover {
        filter: brightness(1.05);
        transform: translateY(-1px);
    }


/* Inputs oscuros */
.form-control-dark {
    background: #0f141b;
    border: 1px solid rgba(207,214,228,.25);
    color: var(--white);
    border-radius: 12px;
}

    .form-control-dark:focus {
        background: #101621;
        color: var(--white);
        border-color: var(--blue-steel);
        box-shadow: 0 0 0 .25rem rgba(122,165,255,.15);
    }


/* Links acento */
.link-acc {
    color: var(--blue-steel);
    text-decoration: none;
}

    .link-acc:hover {
        color: var(--cyan);
    }


/* Dividers & footer */
.divider {
    border-color: rgba(255,255,255,.06);
}

.footer {
    background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,0));
    border-top: 1px solid rgba(255,255,255,.06);
}


/* Microinteracciones */
.floating {
    animation: floatY 6s ease-in-out infinite;
    will-change: transform;
}

@keyframes floatY {
    0%,100% {
        transform: translateY(0)
    }

    50% {
        transform: translateY(-8px)
    }
}


/* Parallax layers */
.parallax.layer-1 {
    position: absolute;
    inset: -20%;
    background: radial-gradient(800px 400px at 15% 20%, rgba(122,165,255,.15), transparent 60%), radial-gradient(1000px 600px at 85% 40%, rgba(109,226,255,.10), transparent 65%);
    transform: translateZ(0);
}


/* Scroll reveal util */
[data-sr] {
    opacity: 0;
    transform: translateY(12px) scale(.98) rotate(.2deg);
}

.revealed {
    opacity: 1 !important;
    transform: none !important;
    transition: all .8s cubic-bezier(.2,.8,.2,1);
}


/* Spacing helpers */
.lead {
    color: var(--steel-300);
}

.fw-700 {
    font-weight: 700;
}


/* ===== Ajustes estilo landing de referencia ===== */ .hero .hero-visual {
    background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
    border-radius: 20px;
}

.tech-section .card-feature {
    border: 1px solid rgba(207,214,228,.18);
    background: #0f141b;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: inset 0 1px 0 rgba(255,255,255,.06), 0 10px 30px rgba(0,0,0,.35);
}

.card-feature .feature-media {
    height: 210px;
    background-size: cover;
    background-position: center;
    filter: saturate(.9) contrast(1.05);
    position: relative;
}

    .card-feature .feature-media::after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, rgba(0,0,0,.0), rgba(0,0,0,.25));
    }

.card-feature .card-body {
    padding: 1.25rem 1.25rem 1.5rem;
}

.navbar .nav-link {
    letter-spacing: .06em;
    text-transform: uppercase;
    font-size: .9rem;
    color: var(--steel-300);
}

    .navbar .nav-link:hover {
        color: var(--white);
    }

/* Mejoras tipográficas */ .title-hero {
    line-height: 1.05;
}

.section-title {
    text-transform: uppercase;
    letter-spacing: .06em;
}

/* Responsive hero image styling */ .hero .hero-visual {
    padding: 1rem;
}

.hero .hero-arm {
    width: 100%;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 18px 28px rgba(0,0,0,.6));
}

@media (min-width: 992px) {
    .hero .hero-visual {
        min-height: 520px;
    }
}