/* Global Styles */
:root {
    --primary-color: #4a90e2;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --light-bg: #f8f9fa;
    --dark-text: #333;
    --light-text: #fff;
    --border-radius: 8px;
}

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

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    overflow: hidden;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    flex-shrink: 0;
    overflow: hidden;
}

.logo-image {
    display: block;
    height: 60px;
    max-height: 60px;
    width: auto;
    max-width: 220px;
    object-fit: contain;
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a {
    font-weight: 500;
    transition: color 0.3s;
}

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

.nav-links a.active {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('https://source.unsplash.com/1600x900/?education,technology');
    background-size: cover;
    background-position: center;
    color: var(--light-text);
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 20px;
    margin-bottom: 40px;
}

.newsletter-form {
    max-width: 600px;
    margin: 0 auto;
    background: rgba(255,255,255,0.1);
    padding: 30px;
    border-radius: var(--border-radius);
    backdrop-filter: blur(5px);
}

.newsletter-form h3 {
    margin-bottom: 15px;
}

.form-group {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.form-group input {
    padding: 12px;
    border: none;
    border-radius: var(--border-radius);
    width: 70%;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--primary-color);
    color: var(--light-text);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    transition: background 0.3s;
}

.btn:hover {
    background-color: #357abd;
}

/* Featured Courses / Grid */
.section {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
    font-size: 32px;
    color: var(--secondary-color);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background: #fff;
    border: 1px solid #eee;
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.card-img {
    height: 200px;
    background-color: #ddd;
    background-size: cover;
    background-position: center;
}

.card-content {
    padding: 20px;
}

.card-title {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.card-desc {
    color: #666;
    margin-bottom: 20px;
    font-size: 14px;
}

/* Contact Form */
.contact-container {
    max-width: 800px;
    margin: 0 auto;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-form input,
.contact-form textarea {
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-family: inherit;
}

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

/* Footer */
footer {
    background-color: var(--secondary-color);
    color: var(--light-text);
    padding: 40px 0;
    margin-top: auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-links a {
    margin: 0 10px;
    font-size: 14px;
    opacity: 0.8;
}

.footer-links a:hover {
    opacity: 1;
}

.copyright {
    text-align: center;
    margin-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none; /* Simplification: Menu hidden on mobile for basic implementation */
    }
    
    .hero h1 {
        font-size: 36px;
    }
    
    .form-group {
        flex-direction: column;
    }
    
    .form-group input {
        width: 100%;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}