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

/* BODY */
body {
    background: radial-gradient(circle at top, #1e3a8a, #020617 70%);
    color: white;
    font-family: Arial, sans-serif;
}

/* CONTENEDOR GENERAL */
.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

/* HEADER / NAVBAR */
.header {
    background: rgba(2,6,23,0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(59,130,246,0.2);
    padding: 15px 0;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    height: 50px;
}

.menu a {
    color: white;
    margin-left: 20px;
    text-decoration: none;
    transition: 0.3s;
}

.menu a:hover {
    color: #3b82f6;
}

/* TITULOS */
h2 {
    margin-bottom: 20px;
    color: #3b82f6;
}

/* LISTAS */
ul li {
    margin: 10px 0;
    font-size: 1.1rem;
}

/* HERO */
.hero {
    position: relative;
    height: 100vh;

    background:
        radial-gradient(circle at center, rgba(59,130,246,0.25), transparent 60%),
        linear-gradient(180deg, #020617, #020617);

    display: flex;
    align-items: center;
    justify-content: center;
}

/* EFECTO PROFUNDIDAD */
.hero::before {
    content: "";
    position: absolute;

    width: 600px;
    height: 600px;

    background: radial-gradient(circle, rgba(59,130,246,0.2), transparent);
    filter: blur(100px);

    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);

    z-index: 0;
}

/* EFECTO EXTRA */
.hero::after {
    content: "";
    position: absolute;

    width: 800px;
    height: 800px;

    background: radial-gradient(circle, rgba(30,64,175,0.15), transparent);

    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);

    filter: blur(120px);
    z-index: 0;
}

/* LOGO */
.hero-logo {
    width: 260px;
    margin-bottom: 20px;

    border-radius: 20px;

    background: radial-gradient(circle, rgba(30,64,175,0.25), transparent);
    padding: 20px;

    box-shadow:
        0 0 40px rgba(59,130,246,0.3),
        0 0 80px rgba(0,0,0,0.6);

    opacity: 0.95;
}

/* CONTENIDO HERO */
.overlay {
    position: relative;
    z-index: 2;

    text-align: center;

    background: rgba(2, 6, 23, 0.65);
    padding: 50px;

    border-radius: 25px;

    backdrop-filter: blur(15px);

    box-shadow: 0 0 50px rgba(0,0,0,0.6);
}

/* SECCIONES */
.section {
    padding: 80px 0;
}

.dark {
    background: #020617;
}

/* GRID */
.grid {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 30px;
}

/* CARDS */
.card {
    background: rgba(30, 41, 59, 0.6);
    padding: 25px;
    border-radius: 15px;

    backdrop-filter: blur(10px);

    flex: 1 1 250px;
    transition: 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(59,130,246,0.2);
}

/* BOTÓN */
.btn {
    display: inline-block;
    margin-top: 20px;
    background: #1f6feb;
    padding: 12px 25px;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    transition: 0.3s;
}

.btn:hover {
    background: #3b82f6;
}

/* FOOTER */
.footer {
    text-align: center;
    padding: 20px;
    background: #020617;
}