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

body {
    background: linear-gradient(#1f2641, #2b355f);
    min-height: 70vh;
}

.container-courses {
    position: relative;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    padding: 100px 0;
    margin: 10px;
    gap: 40px 60px;
}

.container-courses .drop {
    position: relative;
    width: 350px;
    height: 350px;
    background: #97a5d8;
    box-shadow: inset 20px 20px 20px 20px rgba(0, 0, 0, 0.05), 25px 25px 20px #1f2641, 25px 30px 30px rgba(0, 0, 0, 0.05), inset -20px -20px 25px #48558d;
    transition: 0.5s ease-in-out;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container-courses .drop:nth-child(1) {
    border-radius: 60% 40% 72% 28% / 44% 48% 52% 56%;
}

.container-courses .drop:nth-child(2) {
    border-radius: 46% 54% 55% 45% / 58% 58% 42% 42%;
}

.container-courses .drop:nth-child(3) {
    border-radius: 57% 43% 44% 56% / 51% 68% 32% 49%;
}

.container-courses .drop:hover {
    border-radius: 50%;
}

.container-courses .drop::before {
    content: '';
    position: absolute;
    top: 50px;
    left: 85px;
    width: 35px;
    height: 35px;
    background: #fff;
    border-radius: 50%;
    opacity: 0.9;
}

.container-courses .drop::before {
    content: '';
    position: absolute;
    top: 90px;
    left: 110px;
    width: 15px;
    height: 15px;
    background: #fff;
    border-radius: 50%;
    opacity: 0.9;
}

.container-courses .drop .content {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    text-align: center;
    padding: 40px;
    gap: 15px;
}

.container-courses .drop .content h2 {
    position: relative;
    width: 80px;
    height: 80px;
    background: #97a5d8;
    border-radius: 50%;
    box-shadow: inset 20px 20px 20px 20px rgba(0, 0, 0, 0.05), 15px 15px 10px #1f2641, 25px 30px 30px rgba(0, 0, 0, 0.05), inset -20px -20px 25px #48558d;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2em;
    color: #fff;
}

.container-courses .drop .content a {
    position: relative;
    padding: 10px 25px;
    background: #283052;
    text-decoration: none;
    color: #fff;
    border-radius: 25px;
    font-weight: 500;
    text-shadow: 0 2px 2px rgba(0, 0, 0, 0.25);
    opacity: 0.75;
    transition: 0.5s;
}

.container-courses .drop .content a:hover {
    opacity: 1;
}

.container-courses .drop .content a::before {
    content: '';
    position: absolute;
    top: 8px;
    width: 65%;
    height: 5px;
    transform: translateX(-50%);
    border-radius: 5px;
    background: rgba(255, 255, 255, 255, 0.5);
}