/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 2rem;
    color: #333;
}

/* Container and Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.main-title {
    font-size: 3rem;
    font-weight: 700;
    color: white;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 3rem;
    font-weight: 300;
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 1rem;
}

/* Flip Card Container */
.flip-card {
    width: 100%;
    height: 400px;
    perspective: 1000px; /* Creates 3D depth */
    cursor: pointer;
}

/* Flip Card Inner Container */
.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s ease; /* Smooth flip animation */
    transform-style: preserve-3d; /* Maintains 3D space */
}

/* Flip Effect on Hover */
.flip-card:hover .flip-card-inner {
    transform: rotateY(180deg); /* Rotates 180 degrees around Y-axis */
}

/* Front and Back Face Common Styles */
.flip-card-front,
.flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden; /* Hides the rear of each face */
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

/* Front Face Styles */
.flip-card-front {
    background: white;
    display: flex;
    flex-direction: column;
}

.card-image {
    width: 100%;
    height: 60%;
    object-fit: cover;
    border-top-left-radius: 20px;
    border-top-right-radius: 20px;
}

.card-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.card-tagline {
    font-size: 1rem;
    color: #718096;
    font-weight: 400;
}

/* Back Face Styles */
.flip-card-back {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transform: rotateY(180deg); /* Initially rotated to be hidden */
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.back-content {
    text-align: center;
    color: white;
}

.back-title {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.back-description {
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    opacity: 0.95;
    font-weight: 300;
}

/* Skills Section */
.skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.skill-tag {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
}

.skill-tag:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* Call to Action Button */
.cta-button {
    background: rgba(255, 255, 255, 0.9);
    color: #667eea;
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    font-family: 'Poppins', sans-serif;
}

.cta-button:hover {
    background: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.cta-button:active {
    transform: translateY(-1px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-title {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .flip-card {
        height: 350px;
    }
    
    .back-content {
        padding: 1rem;
    }
    
    .back-title {
        font-size: 1.5rem;
    }
    
    .back-description {
        font-size: 0.9rem;
    }
    
    .skills {
        gap: 0.3rem;
    }
    
    .skill-tag {
        font-size: 0.75rem;
        padding: 0.3rem 0.6rem;
    }
}

@media (max-width: 480px) {
    body {
        padding: 1rem;
    }
    
    .main-title {
        font-size: 1.8rem;
    }
    
    .flip-card {
        height: 320px;
    }
    
    .card-content {
        padding: 1rem;
    }
    
    .card-title {
        font-size: 1.3rem;
    }
    
    .back-content {
        padding: 0.8rem;
    }
}

/* Additional Hover Effects */
.flip-card {
    transition: transform 0.3s ease;
}

.flip-card:hover {
    transform: scale(1.02);
}

/* Focus States for Accessibility */
.cta-button:focus {
    outline: 2px solid rgba(255, 255, 255, 0.8);
    outline-offset: 2px;
}

/* Smooth Loading Animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.flip-card {
    animation: fadeInUp 0.6s ease forwards;
}

.flip-card:nth-child(1) { animation-delay: 0.1s; }
.flip-card:nth-child(2) { animation-delay: 0.2s; }
.flip-card:nth-child(3) { animation-delay: 0.3s; }
.flip-card:nth-child(4) { animation-delay: 0.4s; }