/* ===== RESET AND BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #ffd700;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --dark-color: #2c3e50;
    --light-color: #f8fafc;
    --text-color: #333;
    --text-light: #666;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    overflow-x: hidden;
}

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

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4 {
    line-height: 1.2;
    font-weight: 700;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; margin-bottom: 1rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.2rem; }

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

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    margin: 1rem auto;
    border-radius: 2px;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.btn-secondary {
    background: transparent;
    border: 2px solid white;
    color: white;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.btn-paystack {
    background: #1ab7ea;
    color: white;
    width: 100%;
    padding: 1rem;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
}

.btn-paystack:hover {
    background: #0f9bd8;
}

/* ===== NAVIGATION ===== */
.navbar {
    background: var(--dark-color);
    color: white;
    padding: 1rem 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

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

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    background: linear-gradient(135deg, #ffd700, #fff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu li a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    transition: all 0.3s;
    border-radius: 4px;
    font-weight: 500;
}

.nav-menu li a:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

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

/* ===== HERO SECTION ===== */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    text-align: center;
    padding: 8rem 0 6rem;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" opacity="0.1"><text x="10" y="50" font-size="20">💻</text><text x="50" y="30" font-size="20">⚡</text><text x="80" y="70" font-size="20">🚀</text></svg>') repeat;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    animation: fadeInUp 1s ease;
}

.hero .highlight {
    color: var(--accent-color);
    position: relative;
    display: inline-block;
}

.hero .highlight::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 0;
    width: 100%;
    height: 10px;
    background: rgba(255, 215, 0, 0.3);
    z-index: -1;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-buttons {
    animation: fadeInUp 1s ease 0.4s both;
}

/* ===== FEATURES SECTION ===== */
.features {
    padding: 5rem 0;
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    text-align: center;
    padding: 2rem;
    border-radius: 15px;
    transition: all 0.3s;
    background: white;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.2);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.feature-icon i {
    font-size: 2rem;
    color: white;
}

/* ===== COURSES SECTION ===== */
.courses-section {
    padding: 5rem 0;
    background: var(--light-color);
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.course-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: all 0.3s;
    position: relative;
}

.course-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.2);
}

.course-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--accent-color);
    color: var(--dark-color);
    padding: 0.3rem 1rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    z-index: 1;
}

.course-badge.premium {
    background: #1ab7ea;
    color: white;
}

.course-image {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
}

.course-image i {
    font-size: 4rem;
    color: white;
    opacity: 0.8;
}

.course-content {
    padding: 2rem;
}

.course-content h3 {
    margin-bottom: 0.5rem;
}

.course-content p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.course-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.course-meta span {
    background: var(--light-color);
    padding: 0.3rem 0.8rem;
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--text-light);
}

.course-meta i {
    margin-right: 0.3rem;
    color: var(--primary-color);
}

.course-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid #e0e0e0;
    padding-top: 1.5rem;
}

.course-price {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.course-price.free {
    color: var(--success-color);
}

/* ===== PREMIUM PLANS SECTION ===== */
.premium-section {
    padding: 5rem 0;
    background: white;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.pricing-card {
    background: white;
    border-radius: 20px;
    padding: 2.5rem 2rem;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    position: relative;
    transition: all 0.3s;
    border: 1px solid #e0e0e0;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.2);
}

.pricing-card.featured {
    border: 2px solid var(--accent-color);
    transform: scale(1.05);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-10px);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-color);
    color: var(--dark-color);
    padding: 0.3rem 1.5rem;
    border-radius: 50px;
    font-weight: bold;
    font-size: 0.9rem;
    box-shadow: 0 5px 15px rgba(255, 215, 0, 0.3);
}

.pricing-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid #f0f0f0;
}

.pricing-header h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.price {
    font-size: 3rem;
    font-weight: bold;
    color: var(--primary-color);
}

.price span {
    font-size: 1rem;
    color: var(--text-light);
    font-weight: normal;
}

.savings {
    color: var(--success-color);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.features-list {
    list-style: none;
    margin-bottom: 2rem;
    text-align: left;
}

.features-list li {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.features-list i {
    color: var(--success-color);
}

/* ===== TESTIMONIALS SECTION ===== */
.testimonials {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.testimonials h2 {
    color: white;
}

.testimonials h2::after {
    background: var(--accent-color);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.testimonial-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.testimonial-card i {
    color: var(--accent-color);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.testimonial-card p {
    font-style: italic;
    margin-bottom: 1.5rem;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.testimonial-author i {
    font-size: 2.5rem;
    margin-bottom: 0;
}

/* ===== CTA SECTION ===== */
.cta-section {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--dark-color), #1a2634);
    color: white;
    text-align: center;
}

.cta-section h2 {
    color: white;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* ===== FOOTER ===== */
footer {
    background: var(--dark-color);
    color: white;
    padding: 4rem 0 1rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h4 {
    margin-bottom: 1.5rem;
    color: var(--accent-color);
}

.footer-section p {
    color: #bdc3c7;
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.8rem;
}

.footer-section ul li a {
    color: #bdc3c7;
    text-decoration: none;
    transition: all 0.3s;
}

.footer-section ul li a:hover {
    color: var(--accent-color);
    padding-left: 5px;
}

.footer-section i {
    margin-right: 0.5rem;
    color: var(--accent-color);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    color: white;
    background: rgba(255, 255, 255, 0.1);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

.social-links a:hover {
    background: var(--accent-color);
    color: var(--dark-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #bdc3c7;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--dark-color);
        flex-direction: column;
        padding: 1rem;
        text-align: center;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero {
        padding: 6rem 0 4rem;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .pricing-card.featured {
        transform: scale(1);
    }
    
    .pricing-card.featured:hover {
        transform: translateY(-10px);
    }
    
    .course-grid {
        grid-template-columns: 1fr;
    }
}