/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
    scroll-behavior: smooth;
}

:root {
    --primary-color: #0f172a; /* Dark Blue/Slate */
    --accent-color: #2563eb;  /* Bright Blue */
    --text-color: #334155;
    --light-bg: #f8fafc;
    --white: #ffffff;
}

body {
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    width: 85%;
    max-width: 1200px;
    margin: 0 auto;
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background-color: var(--accent-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: #1d4ed8;
    transform: translateY(-2px);
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.section-title .line {
    width: 70px;
    height: 4px;
    background-color: var(--accent-color);
    margin: 10px auto 0;
    border-radius: 2px;
}

/* Header & Navigation */
header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 0;
}

.logo h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.logo h1 span {
    color: var(--accent-color);
}

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

.nav-links li a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: 0.3s;
}

.nav-links li a:hover, .nav-links li a.active {
    color: var(--accent-color);
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(rgba(15, 23, 42, 0.8), rgba(15, 23, 42, 0.8)), url('https://images.unsplash.com/photo-1523050854058-8df90110c9f1?q=80&w=1920') no-repeat center center/cover;
    height: 80vh;
    display: flex;
    align-items: center;
    color: var(--white);
    text-align: center;
}

.hero-content h2 {
    font-size: 1.8rem;
    font-weight: 300;
    letter-spacing: 2px;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin: 10px 0 20px;
}

.hero-content p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 30px;
    opacity: 0.9;
}

/* About Section */
.about-section {
    padding: 5rem 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.about-text p {
    margin-bottom: 15px;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.feature-card {
    background-color: var(--light-bg);
    padding: 1.5rem;
    border-left: 5px solid var(--accent-color);
    display: flex;
    align-items: center;
    gap: 15px;
    border-radius: 0 8px 8px 0;
}

.feature-card i {
    font-size: 1.8rem;
    color: var(--accent-color);
}

.feature-card h4 {
    font-size: 1.1rem;
    color: var(--primary-color);
}

/* Courses Section */
.courses-section {
    background-color: var(--light-bg);
    padding: 5rem 0;
}

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

.course-card {
    background-color: var(--white);
    padding: 2.5rem 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: 0.3s;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.course-icon {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

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

/* Contact Section */
.contact-section {
    padding: 5rem 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.contact-info p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.contact-info i {
    color: var(--accent-color);
    margin-right: 10px;
    width: 20px;
}

.contact-form form {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.contact-form input, .contact-form textarea {
    padding: 1rem;
    border: 1px solid #cbd5e1;
    border-radius: 5px;
    outline: none;
    font-size: 1rem;
}

.contact-form input:focus, .contact-form textarea:focus {
    border-color: var(--accent-color);
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: var(--white);
    text-align: center;
    padding: 2rem 0;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--white);
        box-shadow: 0 4px 10px rgba(0,0,0,0.1);
        padding: 1rem 0;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        text-align: center;
        margin: 10px 0;
    }

    .hero-content h1 {
        font-size: 2.3rem;
    }

    .about-grid, .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}