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

/* Global styles */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --white: #ffffff;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

/* Header styles */
header {
    background-color: var(--primary-color);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.navbar {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    color: var(--white);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

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

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

/* Main content styles */
main {
    margin-top: 80px;
    min-height: calc(100vh - 160px);
}

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

.hero {
    background-color: var(--light-bg);
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-color);
    max-width: 800px;
    margin: 0 auto;
}

/* Contact form styles */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
    padding: 2rem;
    background-color: var(--light-bg);
    border-radius: 8px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.form-group textarea {
    height: 150px;
    resize: vertical;
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background-color: var(--secondary-color);
    color: var(--white);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background-color: #2980b9;
}

/* Footer styles */
footer {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 2rem 0;
    text-align: center;
}

/* Course Grid styles */
.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.course-card {
    background-color: var(--light-bg);
    padding: 2rem;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.course-card:hover {
    transform: translateY(-5px);
}

.course-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Features Grid styles */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature {
    text-align: center;
    padding: 2rem;
    background-color: var(--light-bg);
    border-radius: 8px;
}

.feature h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Contact page specific styles */
.contact-info {
    margin-bottom: 3rem;
}

.contact-details {
    background-color: var(--light-bg);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.office-hours {
    background-color: var(--light-bg);
    padding: 2rem;
    border-radius: 8px;
    margin-top: 3rem;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--white);
    margin: 5px 0;
    transition: 0.3s;
}

/* Responsive design */
@media (max-width: 768px) {
    .navbar {
        flex-direction: row;
        justify-content: space-between;
        padding: 1rem;
    }

    .menu-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        width: 100%;
        position: absolute;
        top: 100%;
        left: 0;
        background-color: var(--primary-color);
        padding: 1rem;
    }

    .nav-links.active {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .course-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 1rem;
    }
}