.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 3rem 0;
}

.project-icon {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 4rem;
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.4), 0 10px 20px rgba(0, 0, 0, 0.2);
    animation: float 6s ease-in-out infinite;
    transition: var(--transition);
    cursor: pointer;
}

@keyframes float {
    0%, 100% { 
        transform: translateY(0px);
        box-shadow: 0 20px 40px rgba(102, 126, 234, 0.4), 0 10px 20px rgba(0, 0, 0, 0.2);
    }
    50% { 
        transform: translateY(-20px);
        box-shadow: 0 30px 60px rgba(102, 126, 234, 0.5), 0 15px 30px rgba(0, 0, 0, 0.3);
    }
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 600;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.cta-button:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

/* Section Styles */
.section {
    padding: 5rem 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-light);
    /* Changed from --text-primary to --text-light for dark backgrounds */
}

/* Project Overview */
.project-overview {
    background: var(--bg-dark-about);
}

.overview-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.overview-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-light);
    /* Changed from --text-primary to --text-light */
}

.overview-text p {
    margin-bottom: 1.5rem;
    color: var(--text-muted);
    /* Changed from --text-secondary to --text-muted for better contrast */
}

.overview-video {
    position: relative;
    display: inline-block;
    transition: transform 0.3s ease;
    grid-row: span 2;
}

.overview-video video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 10px;
}

.overview-video.active {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(1.5);
    z-index: 5;
}

.overview-video:hover {
    cursor: zoom-in;
}

.overview-video.active:hover {
    cursor: zoom-out;
}

.tech-list ul {
    list-style: none;
}

.tech-list li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-light);
    /* Changed from --text-primary to --text-light */
}

.tech-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* Subjects Section */
.subjects-section {
    background: var(--bg-card);
    /* Changed from --bg-dark to --bg-card for better distinction from footer */
    color: var(--text-light);
    border-top: 1px solid var(--contact-card-border);
    /* Added subtle border for separation */
}

.subjects-section .section-title {
    color: var(--text-light);
}

.subjects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.subject-card {
    background: var(--contact-card-bg);
    /* Using consistent card background */
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--contact-shadow);
    transition: var(--transition);
    position: relative;
    height: 300px;
    border: 1px solid var(--contact-card-border);
}

.subject-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
    /* Added hover border color for better feedback */
}

.subject-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

.subject-card:hover .subject-card-inner {
    transform: rotateY(180deg);
}

.subject-card-front,
.subject-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 2rem;
}

.subject-card-front {
    color: white;
}

.subject-card-back {
    background: var(--contact-card-bg);
    color: var(--text-light);
    transform: rotateY(180deg);
    border: 1px solid var(--contact-card-border);
}

.subject-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-align: center;
}

.subject-card p {
    font-size: 0.9rem;
    line-height: 1.6;
    text-align: center;
    color: var(--text-muted);
}

.subject-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    opacity: 0.9;
}

/* Enhanced Gradient Variations for Project Cards */
.subject-card:nth-child(1) .subject-card-front {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.subject-card:nth-child(2) .subject-card-front {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.subject-card:nth-child(3) .subject-card-front {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.subject-card:nth-child(4) .subject-card-front {
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
}

.subject-card:nth-child(5) .subject-card-front {
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
}

.subject-card:nth-child(6) .subject-card-front {
    background: linear-gradient(135deg, #667eea 0%, #48cae4 100%);
}

.subject-card:nth-child(7) .subject-card-front {
    background: linear-gradient(135deg, #a18cd1 0%, #fbc2eb 100%);
}

.subject-card:nth-child(8) .subject-card-front {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
}

.back-link {
    display: inline-block;
    margin-bottom: 1rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.back-link:hover {
    color: var(--text-light);
    transform: translateX(-5px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .overview-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .subjects-grid {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 2rem;
    }

    .project-icon {
        width: 150px;
        height: 150px;
        font-size: 3rem;
    }

    .subject-card {
        height: 280px;
    }

    .subject-card h3 {
        font-size: 1.1rem;
    }

    .subject-card p {
        font-size: 0.85rem;
    }

    .overview-video:hover {
        position: inherit;
        transform: scale(1.1);
    }

    .overview-text p {
        text-align: center;
    }

    .tech-list li {
        font-size: 1rem;
    }
}