:root {
    --primary-green: #2E7D32;     /* Forest green */
    --light-green: #E8F5E9;       /* Soft leaf color */
    --earth-brown: #795548;       /* Earth tone */
    --wheat-color: #F5DEB3;       /* Wheat/crop color */
    --sky-blue: #E3F2FD;          /* Rural sky color */
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: #fff;
    color: #333;
}

/* Class Grid */
.class-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin: 40px auto;
    max-width: 1200px;
    padding: 0 20px;
}

.class-card {
    background: white;
    border-radius: 16px;
    padding: 24px;
    border: 1px solid #E0E0E0;
    transition: transform 0.2s ease;
    background: linear-gradient(to bottom, white, var(--light-green));
    text-decoration: none;
}

.class-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 15px rgba(46, 125, 50, 0.1);
}

.class-number {
    background: var(--sky-blue);
    color: var(--primary-green);
    width: 45px;
    height: 45px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    font-size: 20px;
    font-weight: 600;
    border: 2px solid var(--primary-green);
}

.class-card h3 {
    font-size: 24px;
    margin: 16px 0;
    color: var(--primary-green);
}

.subjects {
    color: var(--earth-brown);
    margin-bottom: 24px;
    font-size: 15px;
}

.experiment-count {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--earth-brown);
    padding-top: 16px;
    border-top: 1px solid #E0E0E0;
}

.experiment-count::before {
    content: "🌱";  /* Plant emoji for rural feel */
}

.enter-lab {
    background: var(--primary-green);
    color: white;
    padding: 16px;
    text-align: center;
    border-radius: 8px;
    margin-top: 16px;
    display: block;
    transition: background-color 0.2s ease;
    text-decoration: none;
}

.enter-lab:hover {
    background: #1B5E20;  /* Darker green on hover */
}

/* Features section */
.features-section {
    margin-top: 8px;
    background: var(--light-green);
    padding: 20px 20px;
    border-radius: 24px;
}

.features-section h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 48px;
    color: var(--primary-green);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: white;
    border-radius: 16px;
    padding: 28px;
    text-align: center;
    border: 1px solid #E0E0E0;
    transition: transform 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 15px rgba(46, 125, 50, 0.1);
}

.feature-card h3 {
    margin: 10px 0;
    font-size: 20px;
    color: var(--primary-green);
}

.feature-card p {
    color: var(--earth-brown);
    line-height: 1.6;
}

/* Responsive */
@media (max-width: 1024px) {
    .class-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .class-grid {
        grid-template-columns: 1fr;
    }
}

/* Add these styles for the section title */
.section-title, 
h2 {
    margin-top: 80px;  /* Space below navbar */
    margin-bottom: 40px;
    font-size: 32px;
    color: var(--primary-green);
    text-align: center;
}

/* Adjust class grid margin */
.class-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin: 40px auto;  /* Changed from margin-top */
    max-width: 1200px;
    padding: 0 20px;
}

/* Optional: Add padding to main content area */
main {
    padding-top: 20px;  /* Additional space if needed */
}

/* Add these media queries at the end of the file */
@media (max-width: 1200px) {
    .class-grid {
        grid-template-columns: repeat(3, 1fr);
        padding: 0 15px;
    }
}

@media (max-width: 992px) {
    .class-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .class-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .experiment-section {
        flex-direction: column;
    }

    .experiment-section .text-content,
    .experiment-section .video-frame {
        max-width: 100%;
        margin-right: 0;
        margin-bottom: 20px;
    }

    .experiment-gallery {
        grid-template-columns: repeat(2, 1fr);
    }

    main {
        padding: 20px 15px;
    }

    h2 {
        font-size: 22px;
    }
}

@media (max-width: 480px) {
    .experiment-gallery {
        grid-template-columns: 1fr;
    }

    iframe {
        width: 100%;
        height: 240px;
    }

    .hero-section {
        padding: 60px 0;
    }

    .hero-content {
        padding: 0 15px;
    }
}
.overall-progress-container {
    margin: 20px auto;
    padding: 15px;
    max-width: 800px;
    background-color: #f5f5f5;
    border-radius: 8px;
}

.overall-progress-bar {
    width: 100%;
    height: 20px;
    background-color: #ddd;
    border-radius: 10px;
    overflow: hidden;
    margin: 10px 0;
}

.overall-progress-bar .progress {
    width: 0%;
    height: 100%;
    background-color: #4CAF50;
    transition: width 0.5s ease-in-out;
}