*
{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

body
{
    min-height: 100vh;
    background: linear-gradient(135deg, #0B3C6F, #1676C2, #5AB7FF);
    color: white;
    overflow-x: hidden;
    position: relative;
}

.bg-animation
{
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: .12;
    background:
        radial-gradient(circle at 20% 30%, white 0%, transparent 25%),
        radial-gradient(circle at 80% 60%, white 0%, transparent 25%);
    animation: floatBG 8s ease-in-out infinite alternate;
}

@keyframes floatBG
{
    from
    {
        transform: translateY(0px);
    }

    to
    {
        transform: translateY(-30px);
    }
}

header
{
    width: 100%;
    padding: 25px 70px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    backdrop-filter: blur(10px);
    background: rgba(255,255,255,.08);
    border-bottom: 1px solid rgba(255,255,255,.15);
}

.logoBox
{
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 20px;
    font-weight: bold;
}

.logoBox img
{
    width: 55px;
}

nav
{
    display: flex;
    gap: 20px;
}

nav a
{
    text-decoration: none;
    color: white;
    padding: 10px 18px;
    border-radius: 30px;
    transition: .3s;
}

nav a:hover
{
    background: rgba(255,255,255,.15);
}

main
{
    min-height: calc(100vh - 180px);
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 40px;
}

.hero
{
    animation: fadeUp 1s ease;
}

@keyframes fadeUp
{
    from
    {
        opacity: 0;
        transform: translateY(40px);
    }

    to
    {
        opacity: 1;
        transform: translateY(0);
    }
}

.heroLogo
{
    width: 180px;
    margin-bottom: 25px;
    filter: drop-shadow(0 0 25px rgba(255,255,255,.25));
}

h1
{
    font-size: 62px;
    margin-bottom: 20px;
}
h2
{
    font-size: 32px;
    margin-bottom: 20px;
}

p
{
    font-size: 22px;
    opacity: .95;
    margin-bottom: 35px;
}

.mainBtn,
#options button
{
    border: none;
    cursor: pointer;
    transition: .3s;
}

.mainBtn
{
    padding: 18px 45px;
    border-radius: 50px;
    font-size: 20px;
    font-weight: bold;
    color: white;
    background: rgba(255,255,255,.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,.25);
}
.box
{
    position: relative;
    width: 300px;
    height: 150px;
    background: #222;
    color: white;

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

    font-size: 24px;
    border-radius: 10px;
}

.mainBtn:hover
{
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0,0,0,.2);
}

#options
{
    margin-top: 25px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    animation: fadeUp .4s ease;
}

#options button
{
    padding: 16px 35px;
    border-radius: 40px;
    font-size: 18px;
    background: white;
    color: #0B3C6F;
    font-weight: bold;
}

#options button:hover
{
    transform: scale(1.05);
}

.smallBtn
{
    width: fit-content;
    margin: auto;
    font-size: 14px !important;
    padding: 10px 25px !important;
}

.hidden
{
    display: none !important;
}

footer
{
    padding: 25px;
    text-align: center;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
    background: rgba(0,0,0,.15);
    backdrop-filter: blur(10px);
}

/* Animar borde "borde" con before
En realidad creas un elemento mas grande detras del div */

.mainBtn::before
{
    content: "";
    position: absolute;

    inset: -4px;

    background: linear-gradient(
        90deg,
        cyan,
        blue,
        violet
    );

    background-size: 300% 300%;
    border-radius: 10px;
    animation: moverBorde 4s linear infinite;
    z-index: -1;
}

@keyframes moverBorde
{
    0% {background-position: 0% 50%;}
    100%{background-position: 300% 50%;}
}

@media (max-width: 768px)
{
    header
    {
        padding: 15px 20px;
        flex-direction: column;
        gap: 15px;
    }

    .logoBox
    {
        flex-direction: column;
        gap: 10px;
        text-align: center;
        font-size: 18px;
    }

    .logoBox img
    {
        width: 45px;
    }

    nav
    {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
        gap: 10px;
    }

    nav a
    {
        padding: 8px 14px;
        font-size: 14px;
    }

    h1
    {
        font-size: 36px;
    }

    p
    {
        font-size: 18px;
        padding: 0 15px;
    }

    .heroLogo
    {
        width: 120px;
    }

    footer
    {
        flex-direction: column;
        gap: 10px;
    }
}