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

:root {
    --blue: #2563eb;
    --black: #000000;
    --gray: #4b5563;
    --light-gray: #6b7280;
    --white: #ffffff;
    --bg-gray: #f3f4f6;
    --border: #d1d5db;
    --border-dark: #9ca3af;
}

html {
    background: #000000;
    overscroll-behavior-y: contain;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--black);
    background: #000000;
    font-size: 16px;
    overscroll-behavior-y: contain;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--black);
    text-decoration: none;
    letter-spacing: -0.02em;
}

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

.menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.menu a {
    color: var(--gray);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: color 0.2s;
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--black);
    transition: all 0.3s;
}

/* Hero */
.hero {
    padding: 140px 0 60px;
    background: var(--white);
}

.hero.bg-section {
    background: var(--bg-gray);
}

.breadcrumb {
    margin-bottom: 40px;
    font-size: 14px;
    color: var(--light-gray);
}

.breadcrumb a {
    color: var(--blue);
    text-decoration: none;
}

.breadcrumb span {
    color: var(--light-gray);
}

.hero-wrapper {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: start;
}

.badge {
    display: inline-block;
    background: var(--white);
    color: var(--black);
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 24px;
    border: 1px solid var(--border);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--black);
    margin-bottom: 24px;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 32px;
}

.subtitle strong {
    color: var(--black);
    font-weight: 600;
}

.highlight-box {
    background: var(--white);
    border-left: 4px solid var(--blue);
    padding: 20px 24px;
    border-radius: 8px;
    margin-bottom: 32px;
    display: flex;
    align-items: start;
    gap: 12px;
    border: 1px solid var(--border);
    border-left: 4px solid var(--blue);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.highlight-box i {
    color: var(--blue);
    margin-top: 2px;
    font-size: 18px;
}

.highlight-box p {
    margin: 0;
    color: var(--black);
    font-size: 16px;
    line-height: 1.6;
}

.stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 40px;
}

.stat {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--white);
    border-radius: 8px;
    border: 1px solid var(--border);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.stat i {
    color: var(--blue);
    font-size: 24px;
    width: 28px;
    text-align: center;
}

.stat div {
    display: flex;
    flex-direction: column;
}

.stat strong {
    font-size: 18px;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 4px;
}

.stat span {
    font-size: 14px;
    color: var(--gray);
    font-weight: 400;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.2s;
    border: 2px solid transparent;
    background: var(--black);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--gray);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.2s;
    background: var(--white);
    color: var(--black);
    border: 2px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-gray);
    border-color: var(--black);
}

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

.btn-white:hover {
    background: var(--bg-gray);
}

.btn-white-outline {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

.btn-white-outline:hover {
    background: rgba(255,255,255,0.1);
}

/* Hero Sidebar */
.hero-sidebar {
    position: sticky;
    top: 100px;
}

.benefits {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.benefit {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    transition: all 0.2s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.benefit:hover {
    transform: translateY(-4px);
    border-color: var(--blue);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.benefit-icon {
    width: 64px;
    height: 64px;
    background: var(--bg-gray);
    border: 2px solid var(--blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    color: var(--blue);
    font-size: 24px;
}

.benefit h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 12px;
}

.benefit p {
    color: var(--gray);
    font-size: 15px;
    line-height: 1.6;
    margin: 0;
}

/* Sections */
.section {
    padding: 40px 0;
}

.bg-section {
    background: var(--bg-gray);
}

.section-header {
    text-align: center;
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-header h2 {
    font-size: 2.75rem;
    font-weight: 800;
    color: var(--black);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 12px;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--gray);
    line-height: 1.7;
}

/* Cards */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.card {
    background: var(--white);
    padding: 32px;
    border-radius: 12px;
    border: 1px solid var(--border);
    text-align: center;
    transition: all 0.2s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--blue);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.card-icon {
    width: 80px;
    height: 80px;
    background: var(--bg-gray);
    border: 2px solid var(--blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: var(--blue);
    font-size: 32px;
}

.card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 16px;
}

.card p {
    color: var(--gray);
    line-height: 1.7;
    font-size: 16px;
}

/* Table */
.table-wrapper {
    overflow-x: auto;
    margin-bottom: 60px;
    border-radius: 12px;
    border: 1px solid var(--border);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

thead {
    background: var(--bg-gray);
    border-bottom: 1px solid var(--border);
}

th {
    color: var(--black);
    padding: 16px 20px;
    text-align: left;
    font-weight: 600;
    font-size: 15px;
    border-bottom: 1px solid var(--border);
}

td {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    color: var(--black);
    font-size: 15px;
}

td strong {
    color: var(--black);
    font-weight: 600;
}

tr:hover {
    background: var(--bg-gray);
}

/* Modules */
.modules {
    position: relative;
    padding-left: 48px;
}

.modules::before {
    content: '';
    position: absolute;
    left: 24px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
}

.module {
    display: flex;
    gap: 24px;
    margin-bottom: 32px;
    position: relative;
}

.module-number {
    width: 48px;
    height: 48px;
    background: var(--black);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 800;
    flex-shrink: 0;
    position: relative;
    z-index: 2;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.module-content {
    flex: 1;
    background: var(--white);
    padding: 32px;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all 0.2s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.module-content:hover {
    border-color: var(--blue);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    transform: translateX(5px);
}

.module-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 12px;
}

.module-desc {
    color: var(--gray);
    margin-bottom: 20px;
    line-height: 1.7;
    font-size: 16px;
}

.module-list {
    list-style: none;
    padding: 0;
}

.module-list li {
    padding: 10px 0;
    padding-left: 28px;
    color: var(--gray);
    position: relative;
    font-size: 15px;
    line-height: 1.6;
}

.module-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: 700;
    font-size: 18px;
}

/* Teacher */
.teacher {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 48px;
    align-items: start;
}

.teacher-photo {
    width: 100%;
    height: 320px;
    object-fit: cover;
    border-radius: 12px;
    border: 2px solid var(--border);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.teacher-info h3 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--black);
    margin-bottom: 8px;
}

.teacher-position {
    font-size: 1.25rem;
    color: var(--blue);
    font-weight: 600;
    margin-bottom: 4px;
}

.teacher-company {
    font-size: 16px;
    color: var(--gray);
    margin-bottom: 32px;
}

.experience {
    margin-bottom: 32px;
}

.exp-item {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 12px;
    padding: 16px;
    background: var(--white);
    border-radius: 8px;
    border: 1px solid var(--border);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.exp-item i {
    color: var(--blue);
    font-size: 20px;
    width: 24px;
}

.exp-item span {
    color: var(--black);
    font-weight: 500;
    font-size: 15px;
}

.skills h4 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 16px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 32px;
}

.skill-tag {
    background: var(--white);
    color: var(--black);
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    border: 1px solid var(--border);
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.teacher-bio {
    color: var(--gray);
    line-height: 1.7;
    font-size: 16px;
}

/* FAQ */
.faq {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 16px;
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    background: var(--white);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    font-family: inherit;
}

.faq-question span {
    font-size: 18px;
    font-weight: 600;
    color: var(--black);
}

.faq-question i {
    color: var(--blue);
    transition: transform 0.3s;
    font-size: 14px;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 24px 24px;
    color: var(--gray);
    line-height: 1.7;
    margin: 0;
    font-size: 16px;
}

/* Reviews */
.reviews {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
}

.review {
    background: var(--white);
    padding: 32px;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all 0.2s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.review:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    border-color: var(--blue);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.review-avatar {
    width: 48px;
    height: 48px;
    background: var(--bg-gray);
    border: 2px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--black);
    font-size: 20px;
    flex-shrink: 0;
}

.review-avatar::before {
    content: '';
    display: none;
}

.review-avatar {
    display: none;
}

.review-info h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--black);
    margin: 0;
}

.review-stars {
    color: #fbbf24;
    margin-left: auto;
    font-size: 16px;
    white-space: nowrap;
    flex-shrink: 0;
}

.review p {
    color: var(--gray);
    line-height: 1.7;
    font-size: 16px;
    margin: 0;
}

/* Bonuses */
.bonus-highlight {
    text-align: center;
    margin-bottom: 48px;
    padding: 24px;
    background: var(--white);
    border-radius: 12px;
    border: 1px solid var(--border);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.bonus-highlight h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--black);
    margin: 0;
}

.bonuses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

.bonus-card {
    background: var(--white);
    padding: 32px;
    border-radius: 12px;
    border: 1px solid var(--border);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
}

.bonus-card:hover {
    border-color: var(--blue);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    transform: translateY(-4px);
}

.bonus-icon {
    width: 64px;
    height: 64px;
    background: var(--blue);
    color: var(--white);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 20px;
}

.bonus-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 12px;
}

.bonus-card p {
    color: var(--gray);
    line-height: 1.7;
    font-size: 15px;
    margin-bottom: 20px;
    flex: 1;
}

.bonus-value {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--blue);
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.bonuses-total {
    display: flex;
    justify-content: center;
    margin-top: 48px;
}

.total-card {
    background: var(--white);
    padding: 48px;
    border-radius: 12px;
    border: 2px solid var(--blue);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    text-align: center;
    max-width: 500px;
}

.total-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 24px;
}

.total-amount {
    font-size: 3rem;
    font-weight: 800;
    color: var(--blue);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.total-card p {
    color: var(--gray);
    font-size: 16px;
    line-height: 1.7;
    margin: 0;
}

.total-card strong {
    color: var(--black);
    font-weight: 700;
}

/* CTA */
.cta {
    padding: 100px 0;
    background: var(--black);
    text-align: center;
}

.cta h2 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.cta p {
    font-size: 1.25rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Footer */
footer {
    background: var(--bg-gray);
    padding: 60px 0 32px;
    border-top: 1px solid var(--border);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 48px;
    margin-bottom: 48px;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.footer-logo span {
    color: var(--blue);
}

.footer-col p {
    color: var(--gray);
    line-height: 1.7;
    font-size: 15px;
}

.footer-col h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 16px;
}

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

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul a {
    color: var(--gray);
    text-decoration: none;
    font-size: 15px;
    transition: color 0.2s;
}

.footer-col ul a:hover {
    color: var(--black);
}

.social {
    display: flex;
    gap: 12px;
}

.social a {
    width: 40px;
    height: 40px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--black);
    text-decoration: none;
    transition: all 0.2s;
}

.social a:hover {
    background: var(--blue);
    color: var(--white);
    border-color: var(--blue);
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

.footer-bottom p {
    color: var(--gray);
    font-size: 14px;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-wrapper {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .hero h1 {
        font-size: 3rem;
    }
    
    .hero-sidebar {
        position: static;
    }
    
    .benefits {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .teacher {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .teacher-photo {
        max-width: 320px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 24px;
        border-top: 1px solid var(--border);
        transform: translateX(-100%);
        transition: transform 0.3s;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    }
    
    .menu.active {
        transform: translateX(0);
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .stats {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
    }
    
    .benefits {
        grid-template-columns: 1fr;
    }
    
    .modules {
        padding-left: 32px;
    }
    
    .modules::before {
        left: 16px;
    }
    
    .module-number {
        width: 32px;
        height: 32px;
        font-size: 14px;
    }
    
    .cta h2 {
        font-size: 2rem;
    }
    
    .reviews {
        grid-template-columns: 1fr;
    }
    
    .cards {
        grid-template-columns: 1fr;
    }
    
    .bonuses-grid {
        grid-template-columns: 1fr;
    }
    
    .bonus-highlight h2 {
        font-size: 1.5rem;
    }
    
    .total-card {
        padding: 32px 24px;
    }
    
    .total-amount {
        font-size: 2.5rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .section-header h2 {
        font-size: 1.75rem;
    }
    
    .container {
        padding: 0 16px;
    }
}