:root {
    --primary-color: #250CFE;
    --secondary-color: #F7E05F;
    --white: #FFFFFF;
    --text-color: #333333;
    --light-gray: #f4f4f4;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header & Navigation */
header {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 1rem 0;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-img {
    height: 100px;
    width: auto;
    border-radius: 5px; /* Optional rounded corners */
}

.site-title {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--secondary-color);
    text-decoration: none;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--secondary-color);
}

/* Main Content */
main {
    flex: 1;
    padding: 2rem 0;
}

.hero {
    text-align: center;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.hero p {
    font-size: 1.2rem;
    color: #666;
    font-style: italic;
}

/* Course Blocks */
.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    margin-bottom: 3rem;
}

.course-card {
    background-color: var(--white);
    border: 1px solid #ddd;
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 12px rgba(0,0,0,0.15);
}

.course-card h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.course-btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--white);
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    border: none;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.3s;
}

.course-btn:hover {
    background-color: #1a08b3; /* Darker shade of primary */
}

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 10px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.close-modal {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 2rem;
    cursor: pointer;
    color: #999;
}

.close-modal:hover {
    color: var(--text-color);
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 3rem 0 1rem; /* More top padding */
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-col h3 {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    font-weight: bold;
    color: var(--white);
}

.footer-links-col, .footer-contact {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.footer-links-col a, .footer-contact a {
    color: var(--white);
    text-decoration: none;
    font-size: 0.95rem;
    opacity: 0.9;
    transition: opacity 0.3s, color 0.3s;
}

.footer-links-col a:hover, .footer-contact a:hover {
    opacity: 1;
    color: var(--secondary-color);
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    opacity: 0.9;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    text-align: center;
}

.copyright {
    font-size: 0.85rem;
    opacity: 0.7;
}

/* Utility */
.btn {
    display: inline-block;
    background-color: var(--secondary-color);
    color: var(--primary-color);
    padding: 0.75rem 1.5rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    transition: opacity 0.3s;
}

.btn:hover {
    opacity: 0.9;
}

/* Mobile Menu Button (Hidden on Desktop) */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
    z-index: 1001; /* Above nav links */
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--white);
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        /* Keep logo and burger on same line */
        flex-direction: row; 
        flex-wrap: wrap;
    }
    
    .logo-container {
        /* Ensure logo stays on left */
        flex: 1; 
    }

    .mobile-menu-btn {
        display: flex;
    }

    .nav-links {
        display: none; /* Hidden by default */
        width: 100%;
        flex-direction: column;
        background-color: var(--primary-color);
        padding: 1rem 0;
        margin-top: 1rem;
        border-top: 1px solid rgba(255,255,255,0.1);
        text-align: center;
        gap: 1.5rem;
    }

    .nav-links.active {
        display: flex; /* Show when active */
    }

    .logo-img {
        height: 60px; /* Smaller logo on mobile */
    }

    .site-title {
        font-size: 1.2rem;
    }
}