* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

:root {
    --primary: #4361ee;
    --secondary: #3a0ca3;
    --accent: #7209b7;
    --light: #f8f9fa;
    --dark: #212529;
    --success: #4cc9f0;
    --text: #333333;
}

body {
    background-color: #f5f7fb;
    color: var(--text);
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 15px 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
}

    .logo i {
        font-size: 1.8rem;
    }

nav ul {
    display: flex;
    list-style: none;
    gap: 25px;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

    nav a:hover {
        color: var(--success);
    }

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

/* Hero Section */
.hero {
    padding: 80px 0;
    background: linear-gradient(rgba(67, 97, 238, 0.9), rgba(58, 12, 163, 0.9)), url('https://images.unsplash.com/photo-1523240795612-9a054b0db644?ixlib=rb-4.0.3&auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    color: white;
    text-align: center;
}

    .hero h1 {
        font-size: 2.8rem;
        margin-bottom: 20px;
        line-height: 1.2;
    }

    .hero p {
        font-size: 1.2rem;
        max-width: 700px;
        margin: 0 auto 30px;
    }

.btn {
    display: inline-block;
    background-color: var(--accent);
    color: white;
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

    .btn:hover {
        background-color: var(--success);
        transform: translateY(-3px);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    }

/* Features Section */
.features {
    padding: 80px 0;
    background-color: white;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

    .section-title h2 {
        font-size: 2.2rem;
        color: var(--secondary);
        margin-bottom: 15px;
    }

    .section-title p {
        color: #666;
        max-width: 600px;
        margin: 0 auto;
    }

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

.feature-card {
    background-color: var(--light);
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

    .feature-card:hover {
        transform: translateY(-10px);
    }

.feature-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--dark);
}

/* Test Series Section */
.test-series {
    padding: 80px 0;
    background-color: #f5f7fb;
}

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

.series-card {
    background-color: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

    .series-card:hover {
        transform: translateY(-10px);
    }

.series-header {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    color: white;
    padding: 20px;
    text-align: center;
}

    .series-header h3 {
        font-size: 1.5rem;
        margin-bottom: 5px;
    }

.series-price {
    font-size: 2rem;
    font-weight: 700;
    margin: 15px 0;
}

    .series-price span {
        font-size: 1rem;
        font-weight: normal;
    }

.series-body {
    padding: 25px;
}

.series-features {
    list-style: none;
    margin-bottom: 25px;
}

    .series-features li {
        padding: 8px 0;
        border-bottom: 1px solid #eee;
        display: flex;
        align-items: center;
        gap: 10px;
    }

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

        .series-features li:last-child {
            border-bottom: none;
        }

/* Testimonials */
.testimonials {
    padding: 80px 0;
    background-color: white;
}

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

.testimonial-card {
    background-color: var(--light);
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.testimonial-text {
    font-style: italic;
    margin-bottom: 20px;
    position: relative;
}

    .testimonial-text:before {
        content: """; font-size: 4rem; color: var(--primary); opacity: 0.2;
        position: absolute;
        top: -20px;
        left: -10px;
    }

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 15px;
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.author-info h4 {
    margin-bottom: 5px;
}

.author-info p {
    color: #666;
    font-size: 0.9rem;
}

/* CTA Section */
.cta {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    text-align: center;
}

    .cta h2 {
        font-size: 2.2rem;
        margin-bottom: 20px;
    }

    .cta p {
        max-width: 600px;
        margin: 0 auto 30px;
        font-size: 1.1rem;
    }

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

        .cta .btn:hover {
            background-color: var(--success);
            color: white;
        }

/* Footer */
footer {
    background-color: var(--dark);
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

    .footer-column h3:after {
        content: '';
        position: absolute;
        left: 0;
        bottom: 0;
        width: 50px;
        height: 2px;
        background-color: var(--success);
    }

.footer-links {
    list-style: none;
}

    .footer-links li {
        margin-bottom: 10px;
    }

    .footer-links a {
        color: #aaa;
        text-decoration: none;
        transition: color 0.3s ease;
    }

        .footer-links a:hover {
            color: var(--success);
        }

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

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

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

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #aaa;
    font-size: 0.9rem;
}

/* Responsive Styles */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.3rem;
    }
}

@media (max-width: 768px) {
    .mobile-menu {
        display: block;
    }

    nav ul {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--secondary);
        flex-direction: column;
        padding: 20px;
        text-align: center;
        box-shadow: 0 10px 10px rgba(0, 0, 0, 0.1);
    }

        nav ul.active {
            display: flex;
        }

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

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

@media (max-width: 576px) {
    .hero {
        padding: 60px 0;
    }

        .hero h1 {
            font-size: 1.8rem;
        }

    .features, .test-series, .testimonials, .cta {
        padding: 60px 0;
    }

    .section-title h2 {
        font-size: 1.8rem;
    }
}