/* ===========================
   Reset & Base Styles
=========================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background-color: var(--bg-white);
    overflow-x: hidden;
}

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

section {
    padding: 80px 0;
}

/* ===========================
   Typography
=========================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }

p {
    margin-bottom: 1rem;
}

/* ===========================
   Navigation
=========================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-white);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand h2 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin: 0;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

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

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

/* ===========================
   Buttons
=========================== */
.btn-primary {
    background: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: 2px solid var(--primary-color);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--bg-white);
    color: var(--primary-color);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* ===========================
   Hero Section
=========================== */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 140px 0 80px;
    text-align: center;
    margin-top: 70px;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.highlight {
    color: #fbbf24;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
}

.feature-item i {
    font-size: 1.5rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.cta-buttons .btn-primary,
.cta-buttons .btn-secondary {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* ===========================
   Section Headers
=========================== */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-badge {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.section-header h2 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ===========================
   Webinar Section
=========================== */
.webinar-section {
    background: var(--bg-light);
}

.webinar-card {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 3rem;
    box-shadow: var(--shadow-xl);
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
}

.webinar-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.webinar-date {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 12px;
}

.webinar-date i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.webinar-date h3 {
    margin: 0;
    font-size: 1.3rem;
}

.webinar-date p {
    margin: 0;
    color: var(--text-secondary);
}

.webinar-platform,
.webinar-duration {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: 8px;
}

.webinar-platform i,
.webinar-duration i {
    font-size: 1.5rem;
    color: var(--secondary-color);
}

.webinar-content h3 {
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.check-list {
    list-style: none;
    margin-bottom: 2rem;
}

.check-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    font-size: 1.05rem;
}

.check-list i {
    color: var(--secondary-color);
    font-size: 1.2rem;
}

.webinar-benefit {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    padding: 1.5rem;
    border-radius: 12px;
    border-left: 4px solid var(--accent-color);
}

.benefit-badge {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.benefit-badge i {
    font-size: 2rem;
    color: var(--accent-color);
}

.benefit-badge strong {
    display: block;
    margin-bottom: 0.25rem;
    font-size: 1.1rem;
}

.benefit-badge p {
    margin: 0;
    color: var(--text-secondary);
}

.highlight-text {
    color: #dc2626;
    font-weight: 700;
    font-size: 1.2rem;
}

/* ===========================
   About Section
=========================== */
.positioning-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

.positioning-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.positioning-card.negative {
    border-left: 4px solid #ef4444;
}

.positioning-card.positive {
    border-left: 4px solid var(--secondary-color);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.card-header i {
    font-size: 1.5rem;
}

.negative .card-header i {
    color: #ef4444;
}

.positive .card-header i {
    color: var(--secondary-color);
}

.card-header h3 {
    margin: 0;
}

.positioning-list {
    list-style: none;
}

.positioning-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.positioning-list li:last-child {
    border-bottom: none;
}

.value-proposition {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.main-message {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.process-flow {
    background: var(--bg-light);
    padding: 3rem;
    border-radius: 12px;
}

.process-flow h3 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.flow-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.flow-step {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-md);
    flex: 1;
    min-width: 200px;
}

.step-number {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.flow-steps i {
    color: var(--primary-color);
    font-size: 2rem;
}

/* ===========================
   Curriculum Section
=========================== */
.curriculum-section {
    background: var(--bg-light);
}

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

.overview-item {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow-md);
}

.overview-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.overview-item h4 {
    margin: 0 0 0.25rem 0;
    font-size: 1.1rem;
}

.overview-item p {
    margin: 0;
    color: var(--text-secondary);
}

.weekly-curriculum {
    display: grid;
    gap: 2rem;
}

.week-card {
    background: var(--bg-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease;
}

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

.week-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 2rem;
}

.week-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.4rem 0.8rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.week-header h3 {
    margin: 0 0 0.5rem 0;
}

.week-date {
    margin: 0;
    opacity: 0.9;
    font-size: 0.95rem;
}

.week-content {
    padding: 2rem;
}

.curriculum-list {
    list-style: none;
    margin-bottom: 1.5rem;
}

.curriculum-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    padding: 0.5rem 0;
}

.curriculum-list i {
    color: var(--secondary-color);
    margin-top: 0.25rem;
}

.week-output {
    background: var(--bg-light);
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid var(--accent-color);
}

.week-output strong {
    color: var(--primary-color);
}

/* ===========================
   Pricing Section
=========================== */
.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.pricing-card {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 3rem;
    box-shadow: var(--shadow-lg);
    position: relative;
    border: 2px solid var(--border-color);
    transition: transform 0.3s ease;
}

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

.pricing-card.featured {
    border: 3px solid var(--primary-color);
    box-shadow: 0 20px 40px rgba(37, 99, 235, 0.2);
}

.pricing-badge {
    position: absolute;
    top: -15px;
    right: 20px;
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.9rem;
    box-shadow: var(--shadow-md);
}

.pricing-card h3 {
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 2rem;
    color: var(--primary-color);
}

.pricing-info {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}

.original-price {
    color: var(--text-secondary);
    text-decoration: line-through;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.discount-price {
    margin: 1rem 0;
}

.price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    display: block;
}

.vat {
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: block;
    margin-top: 0.25rem;
}

.pricing-condition {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: var(--bg-light);
    padding: 0.75rem;
    border-radius: 8px;
    margin-top: 1rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.pricing-condition i {
    color: var(--accent-color);
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
}

.pricing-features i {
    color: var(--secondary-color);
    font-size: 1.1rem;
}

.btn-pricing {
    display: block;
    width: 100%;
    text-align: center;
    padding: 1rem;
    background: var(--primary-color);
    color: white;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    border: 2px solid var(--primary-color);
}

.btn-pricing:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
}

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

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

.pricing-note {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
}

.pricing-note i {
    color: var(--primary-color);
    margin-right: 0.5rem;
}

.pricing-note p {
    margin-bottom: 0.5rem;
}

.pricing-note p:last-child {
    margin-bottom: 0;
}

/* ===========================
   Instructor Section
=========================== */
.instructor-section {
    background: var(--bg-light);
}

.instructor-card {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 3rem;
    box-shadow: var(--shadow-xl);
}

.instructor-profile {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}

.instructor-avatar {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
    flex-shrink: 0;
}

.instructor-info h3 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.instructor-title {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.instructor-credentials {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.instructor-credentials span {
    background: var(--bg-light);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.instructor-credentials i {
    color: var(--primary-color);
}

.instructor-experience,
.instructor-achievements {
    margin-bottom: 2rem;
}

.instructor-experience h4,
.instructor-achievements h4 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.experience-list {
    list-style: none;
}

.experience-list li {
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 8px;
    margin-bottom: 1rem;
}

.experience-list strong {
    display: block;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.experience-list p {
    margin: 0.25rem 0;
    color: var(--text-secondary);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.achievement-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: 8px;
}

.achievement-item i {
    color: var(--secondary-color);
    font-size: 1.5rem;
}

.achievement-item strong {
    display: block;
    margin-bottom: 0.25rem;
}

.achievement-item p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.achievements-note {
    text-align: center;
    padding: 1rem;
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border-radius: 8px;
    font-weight: 600;
    color: var(--text-primary);
}

/* ===========================
   FAQ Section
=========================== */
.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-white);
    border-radius: 12px;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s ease;
}

.faq-question:hover {
    background: var(--bg-light);
}

.faq-question h4 {
    margin: 0;
    font-size: 1.2rem;
    color: var(--primary-color);
}

.faq-question i {
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.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 1.5rem 1.5rem 1.5rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===========================
   Registration Section
=========================== */
.registration-section {
    background: var(--bg-light);
}

.registration-container {
    max-width: 1000px;
    margin: 0 auto;
}

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

.step-item {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-md);
}

.step-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

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

.step-item h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.step-date {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.registration-info,
.payment-info {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
}

.registration-info h3,
.payment-info h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.timeline-list {
    list-style: none;
}

.timeline-list li {
    padding: 1rem;
    border-left: 3px solid var(--primary-color);
    margin-left: 1rem;
    margin-bottom: 1rem;
    background: var(--bg-light);
    border-radius: 0 8px 8px 0;
}

.timeline-list strong {
    color: var(--primary-color);
}

.payment-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.payment-method {
    text-align: center;
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 12px;
}

.payment-method i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.payment-method h4 {
    margin-bottom: 0.5rem;
}

.payment-method p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.payment-note {
    text-align: center;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: 8px;
    color: var(--text-secondary);
}

.payment-note i {
    color: var(--primary-color);
}

.cta-box {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 3rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-xl);
}

.cta-box h3 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.cta-box p {
    margin-bottom: 2rem;
    opacity: 0.95;
}

.cta-buttons-registration {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-buttons-registration .btn-large {
    background: white;
    color: var(--primary-color);
    border-color: white;
}

.cta-buttons-registration .btn-large:hover {
    background: var(--bg-light);
    border-color: var(--bg-light);
}

.cta-buttons-registration .btn-secondary {
    background: transparent;
    color: white;
    border-color: white;
}

.cta-buttons-registration .btn-secondary:hover {
    background: white;
    color: var(--primary-color);
    border-color: white;
}

/* ===========================
   Footer
=========================== */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-section h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: #fbbf24;
}

.footer-section p {
    opacity: 0.8;
    line-height: 1.8;
}

.footer-section i {
    margin-right: 0.5rem;
    color: #fbbf24;
}

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

.footer-bottom p {
    margin: 0;
    opacity: 0.6;
}

/* ===========================
   Scroll to Top Button
=========================== */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    z-index: 999;
}

.scroll-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

.scroll-top.visible {
    display: flex;
}

/* ===========================
   Responsive Design
=========================== */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: var(--bg-white);
        width: 100%;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        transition: left 0.3s ease;
    }

    .nav-menu.active {
        left: 0;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-features {
        gap: 1rem;
    }

    .cta-buttons {
        flex-direction: column;
    }

    section {
        padding: 60px 0;
    }

    h2 {
        font-size: 2rem;
    }

    .webinar-card {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 2rem;
    }

    .positioning-grid {
        grid-template-columns: 1fr;
    }

    .flow-steps {
        flex-direction: column;
    }

    .flow-steps i {
        transform: rotate(90deg);
    }

    .curriculum-overview {
        grid-template-columns: 1fr;
    }

    .pricing-cards {
        grid-template-columns: 1fr;
    }

    .instructor-profile {
        flex-direction: column;
        text-align: center;
    }

    .instructor-credentials {
        justify-content: center;
    }

    .achievements-grid {
        grid-template-columns: 1fr;
    }

    .registration-steps {
        grid-template-columns: 1fr;
    }

    .payment-methods {
        grid-template-columns: 1fr;
    }

    .cta-buttons-registration {
        flex-direction: column;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }

    .btn-large {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }

    .price {
        font-size: 2.5rem;
    }

    .week-content {
        padding: 1.5rem;
    }

    .instructor-card {
        padding: 2rem;
    }
}

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

.fade-in {
    animation: fadeInUp 0.6s ease-out;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}