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

body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #222;
    gap: 20px;
    flex-wrap: wrap;
}

.buttons-block {
    display: flex;
    gap: 30px;
    align-items: center;
    flex-grow: 2;
}

.btn { 
    position: relative;
    padding: 15px 40px;
    border: 3px solid #000;
    font-size: 1.25em;
    border-radius: 40px;
    color: #fff;
    background: #292929;
    text-decoration: none;
    overflow: hidden;
}

.btn span {
    position: absolute;
    background: #fff;
    pointer-events: none;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: animate .5s linear infinite;
}

@keyframes animate {
    0% {
        width: 0px;
        height: 0px;
        opacity: .25;
    }
    100% {
        width: 350px;
        height: 350px;
        opacity: 0;
    }
}

.hover_btn {
    position: relative;
    height: 45px;
    width: 150px;
    border-radius: 50px;
    background: #002536;
    color: #0ef;
    font-size: 16px;
    overflow: hidden;
    z-index: 1;
    cursor: pointer;
    transition: .2s;
}

.hover_btn::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 100%;
    transform: skew(45deg);
    background: #002536;
    z-index: -1;
    transition: .2s;
}

.hover_btn:hover::before {
    transform: skew(90deg);
}

.hover_btn:hover {
    color: #002536;
    box-shadow: 0 0 5px #0ef,
                0 0 15px #0ef,
                0 0 30px #0ef,
                inset 0 0 5px #002536;
    background: #0ef;
    border: 2px solid #0ef;
} 

.cards-block {
    position: relative;
    flex-grow: 3;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
}

.container {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 1200px;
    flex-wrap: wrap;
    z-index: 1;
}

.container::before {
    content: "";
    position: absolute;
    top: 5vh;
    left: -12vw;
    width: 35vh;
    height: 35vh;
    background: linear-gradient(#f00, #f0f);
    clip-path: circle(50% at 50%);
}

.container::after {
    content: "";
    position: absolute;
    bottom: 5vh;
    right: -8vw;
    width: 30vh;
    height: 30vh;
    background: linear-gradient(#2196f3, #e91e63);
    clip-path: circle(50% at 50%);
    z-index: -1;
}

.container .card {
    position: relative;
    width: 280px;
    height: 400px;
    margin: 30px;
    box-shadow: 20px 20px 50px rgba(0, 0, 0, .5);
    border-radius: 15px;
    background: rgba(255, 255, 255, .1);
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    border-top: 1px solid rgba(255, 255, 255, .5);
    border-left: 1px solid rgba(255, 255, 255, .5);
    backdrop-filter: blur(5px);
}

.container .card .content {
    position: relative;
    padding: 20px;
    text-align: center;
    transform: translateY(100px);
    opacity: 0;
    transition: .5s;
}

.container .card:hover .content {
    transform: translateY(0px);
    opacity: 1;
}

.container .card .content h2 {
    position: absolute;
    top: -105px;
    right: 16px;
    font-size: 8em;
    color: rgba(255, 255, 255, .05);
    pointer-events: none;
}

.container .card .content h3 {
    font-size: 1.8em;
    color: #fff;
    z-index: 1;
}

.container .card .content p {
    font-size: 1em;
    color: #fff;
    font-weight: 300;
}

.container .card .content a {
    position: relative;
    display: inline-block;
    padding: 8px 20px;
    margin-top: 15px;
    background: #fff;
    color: #000;
    border-radius: 20px;
    text-decoration: none;
    font-weight: 500;
    box-shadow: 0 5px 15px rgba(0, 0, 0, .2);
}