/* Global Styles */
:root {
    --primary-color: #4a6bff;
    --secondary-color: #ff5e84;
    --dark-color: #2a3b4c;
    --light-color: #f4f7ff;
    --success-color: #28a745;
    --error-color: #dc3545;
}

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

body {
    background-color: var(--light-color);
    color: var(--dark-color);
    line-height: 1.6;
}

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

/* Header */
header {
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

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

.nav-menu li {
    margin-left: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 500;
    transition: color 0.3s;
}

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

/* Buttons */
.btn {
    background-color: var(--primary-color);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #3951c6;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, rgba(74, 107, 255, 0.1), rgba(255, 94, 132, 0.1));
    margin-top: 80px;
}

.hero-content {
    max-width: 600px;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.hero p {
    font-size: 18px;
    margin-bottom: 30px;
    color: #4a5568;
}

/* Features Section */
.features {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 36px;
    color: var(--dark-color);
}

.section-title p {
    color: #4a5568;
    margin-top: 10px;
}

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

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

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

.feature-icon {
    font-size: 40px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
}

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

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

.course-card {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
}

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

.course-image {
    height: 200px;
    background-color: #eaeaea;
    display: flex;
    align-items: center;
    justify-content: center;
}

.course-content {
    padding: 20px;
}

.course-content h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.course-content p {
    color: #4a5568;
    margin-bottom: 20px;
}

/* Testimonials Section */
.testimonials {
    padding: 80px 0;
    background: linear-gradient(135deg, rgba(74, 107, 255, 0.1), rgba(255, 94, 132, 0.1));
}

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

.testimonial-text {
    font-style: italic;
    margin-bottom: 20px;
    color: #4a5568;
}

.testimonial-author {
    font-weight: 600;
    color: var(--dark-color);
}

/* CTA Section */
.cta {
    padding: 100px 0;
    text-align: center;
    background-color: white;
}

.cta h2 {
    font-size: 36px;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.cta p {
    max-width: 600px;
    margin: 0 auto 30px;
    color: #4a5568;
}

/* Footer */
footer {
    background-color: var(--dark-color);
    color: white;
    padding: 50px 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.footer-column h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: white;
}

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

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

.footer-column a {
    color: #a0aec0;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-column a:hover {
    color: white;
}

.copyright {
    text-align: center;
    padding-top: 30px;
    margin-top: 30px;
    border-top: 1px solid #4a5568;
    color: #a0aec0;
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background-color: white;
    border-radius: 10px;
    width: 90%;
    max-width: 500px;
    padding: 30px;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.2);
    position: relative;
    transform: translateY(20px);
    transition: transform 0.3s;
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 24px;
    color: #a0aec0;
    background: none;
    border: none;
    cursor: pointer;
}

.modal-title {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: var(--dark-color);
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.form-group input:focus {
    border-color: var(--primary-color);
    outline: none;
}

.error-message {
    color: var(--error-color);
    font-size: 14px;
    margin-top: 5px;
    display: none;
}

.success-message {
    background-color: rgba(40, 167, 69, 0.1);
    color: var(--success-color);
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
    display: none;
}

.form-submit {
    width: 100%;
    padding: 12px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s;
}

.form-submit:hover {
    background-color: #3951c6;
}

/* Checkbox styles */
.checkbox-block {
    margin-bottom: 20px;
}

.checkbox-block label {
    display: flex;
    align-items: flex-start;
    cursor: pointer;
}

.checkbox-block input[type="checkbox"] {
    margin-right: 10px;
    margin-top: 5px;
    width: auto;
}

.checkbox-text {
    font-size: 14px;
    color: #4a5568;
}

.checkbox-text a {
    color: var(--primary-color);
    text-decoration: none;
}

/* Telegram block */
.telegram-block {
    margin-top: 20px;
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #eaeaea;
}

.telegram-btn {
    display: inline-flex;
    align-items: center;
    background-color: #0088cc;
    color: white;
    text-decoration: none;
    padding: 10px 15px;
    border-radius: 5px;
    margin-top: 10px;
    transition: background-color 0.3s;
}

.telegram-btn:hover {
    background-color: #0077b5;
}

.telegram-icon {
    width: 20px;
    height: 20px;
    margin-right: 10px;
}

/* Responsive Styles */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 36px;
    }
    
    .nav-menu {
        display: none;
    }
    
    .header-container {
        flex-direction: column;
        text-align: center;
    }
    
    .logo {
        margin-bottom: 15px;
    }
    
    .hero {
        text-align: center;
        padding: 0 20px;
    }
    
    .feature-card, .course-card, .testimonial-card {
        margin-bottom: 20px;
    }
}