body, html {
    height: 100%;
    margin: 0;
    font-family: 'Inter', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #1d2b3a, #0f172a);
    color: #f0f4f8;
    overflow: hidden;
}

.card-container {
    perspective: 1000px;
}

.business-card {
    width: 500px;
    height: 300px;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 1s;
    cursor: pointer;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.card-container:hover .business-card {
    transform: rotateY(180deg);
}

.card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 15px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 20px;
    box-sizing: border-box;
}

.card-back {
    transform: rotateY(180deg);
}

.content h1 {
    margin: 0;
    font-size: 2.5rem;
    color: #ffffff;
    font-weight: 700;
}

.content p {
    margin: 5px 0 15px;
    font-size: 1.1rem;
    color: #a7c0d8;
}

.skills-overview {
    font-size: 0.9rem;
    color: #8fa7c0;
}

.hover-prompt {
    position: absolute;
    bottom: 20px;
    font-size: 0.8rem;
    color: #8fa7c0;
    opacity: 0.7;
}

.card-back h2 {
    margin-top: 0;
    color: #ffffff;
    border-bottom: 1px solid #a7c0d8;
    padding-bottom: 10px;
}

.card-back ul {
    list-style: none;
    padding: 0;
    margin: 15px 0;
    text-align: left;
    width: 80%;
}

.card-back ul li {
    margin-bottom: 8px;
    font-size: 0.95rem;
    color: #d0e0f0;
}

.card-back .cert {
    font-size: 0.95rem;
    color: #d0e0f0;
    margin-top: 10px;
}

.contact-info {
    position: absolute;
    bottom: 20px;
    width: 100%;
}

.contact-info p {
    margin: 5px 0;
}

.contact-info a {
    color: #60a5fa;
    text-decoration: none;
    font-size: 0.9rem;
}

.contact-info a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 600px) {
    .business-card {
        width: 90vw;
        height: 54vw; /* Maintain aspect ratio */
    }

    .content h1 {
        font-size: 1.8rem;
    }

    .content p {
        font-size: 1rem;
    }
    
    .card-back h2 {
        font-size: 1.2rem;
    }
    
    .card-back ul li, .card-back .cert, .contact-info a {
        font-size: 0.85rem;
    }
}