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

:root {
    --primary-color: #0066FF;
    --primary-dark: #0052CC;
    --primary-light: #3385FF;
    --secondary-color: #1A1D29;
    --text-primary: #1A1D29;
    --text-secondary: #4A5568;
    --text-light: #718096;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F7FAFC;
    --bg-dark: #1A1D29;
    --border-color: #E2E8F0;
    --success-color: #48BB78;
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1);
}

html {
    scroll-behavior: smooth;
}

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

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    font-weight: 700;
    font-size: 24px;
    color: var(--text-primary);
}

.logo-icon {
    width: 140px;
    height: auto;
    display: flex;
    align-items: center;
}

.logo-icon img {
    max-width: 100%;
    height: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s ease;
    padding: 8px 12px;
    border-radius: 6px;
}

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

.nav-link-login {
    color: var(--primary-color);
}

.nav-link-cta {
    background: var(--primary-color);
    color: white !important;
    padding: 10px 24px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.nav-link-cta:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.menu-toggle {
    display: none;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

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

/* Hero Section */
.hero {
    padding: 150px 0 80px;
    background: linear-gradient(-45deg, #f5f7fa, #e8eef5, #d4dde8, #c3cfe2);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 102, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color) 0%, #667eea 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

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

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

.btn-secondary {
    background: white;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

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

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

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

.btn-large {
    width: 100%;
    justify-content: center;
    padding: 16px 32px;
    font-size: 18px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* Section Styles */
section {
    padding: 80px 0;
}

section[id] {
    scroll-margin-top: 90px;
}

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

.section-title {
    font-size: 40px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-description {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Features Section - 2x2 Grid */
.features {
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.02), rgba(102, 126, 234, 0.02));
    background-size: 400% 400%;
    z-index: 0;
}

.features .container {
    position: relative;
    z-index: 1;
}

.features-grid-2x2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
}

.feature-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Benefits Section - Numbers Above Titles */
.benefits {
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

.benefits::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(-45deg, rgba(0, 102, 255, 0.03), transparent, rgba(102, 126, 234, 0.02));
    background-size: 400% 400%;
    z-index: 0;
}

.benefits .container {
    position: relative;
    z-index: 1;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 40px;
}

.benefit-item {
    text-align: center;
    padding: 30px 20px;
}

.benefit-number {
    font-size: 64px;
    font-weight: 700;
    color: var(--primary-color);
    opacity: 0.3;
    line-height: 1;
    margin-bottom: 20px;
}

.benefit-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.benefit-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* How It Works - Vertically Centered with Animated Background */
.how-it-works {
    background: white;
    position: relative;
    overflow: hidden;
}

/* Success Popup */
.success-popup {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.45);
    backdrop-filter: blur(6px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 3000;
}

.success-popup-content {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    max-width: 420px;
    width: 90%;
    text-align: center;
    box-shadow: var(--shadow-xl);
    animation: popupFadeIn 0.35s ease;
}

@keyframes popupFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.97);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.success-popup h2 {
    margin-bottom: 12px;
    font-size: 26px;
    color: var(--text-primary);
}

.success-popup p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
}

/* Back To Top Button */
#back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 24px;
    cursor: pointer;
    z-index: 1500;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
    transition: all 0.3s ease;
}

/* Visible state */
#back-to-top.show {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

#back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
}

/* Animated gradient background effect */
.how-it-works::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(-45deg, #f5f7fa, #e8eef5, #f0f4f8, #e3e9f0);
    background-size: 400% 400%;
    z-index: 0;
}

.how-it-works .container {
    position: relative;
    z-index: 1;
}

.steps {
    display: flex;
    justify-content: space-between;
    align-items: stretch;
    gap: 20px;
    flex-wrap: wrap;
}

.step {
    flex: 1;
    min-width: 250px;
    text-align: center;
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
}

.step-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 24px;
    flex-shrink: 0;
}

.step-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
    min-height: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.step-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

.step-arrow {
    font-size: 32px;
    color: var(--primary-color);
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

/* Example Calculation Section */
.example-calculation {
    background: var(--bg-secondary);
}

.calculation-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

.calculation-preview {
    background: white;
    padding: 60px 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

.preview-placeholder {
    text-align: center;
    color: var(--text-secondary);
}

.preview-placeholder svg {
    margin-bottom: 20px;
    color: var(--primary-color);
}

.calculation-info h3 {
    font-size: 28px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.calculation-description {
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.download-section {
    background: white;
    padding: 30px;
    border-radius: 12px;
    margin-bottom: 30px;
}

.download-section label {
    display: block;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.custom-select {
    position: relative;
    margin-bottom: 20px;
}

.custom-select select {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    background: white;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%234A5568' d='M1.41 0L6 4.59L10.59 0L12 1.41l-6 6l-6-6z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
    transition: border-color 0.3s ease;
}

.custom-select select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.custom-select select:hover {
    border-color: var(--primary-light);
}

.calculation-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.calc-feature {
    color: var(--text-secondary);
    font-size: 15px;
}

/* Demo Video */
.demo-video {
    background: var(--bg-secondary);
}

.video-container {
    max-width: 900px;
    margin: 0 auto;
}

.video-placeholder {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    aspect-ratio: 16/9;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    gap: 20px;
}

.play-button {
    cursor: pointer;
    transition: transform 0.3s ease;
}

.play-button:hover {
    transform: scale(1.1);
}

/* Target Audience */
.target-audience {
    background: white;
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.audience-card {
    background: var(--bg-secondary);
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s ease;
}

.audience-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.audience-icon {
    font-size: 56px;
    margin-bottom: 20px;
}

.audience-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.audience-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Pricing */
.pricing {
    background: var(--bg-secondary);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    border: 2px solid var(--border-color);
    position: relative;
    transition: all 0.3s ease;
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.pricing-card-featured {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.pricing-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.pricing-price {
    margin-bottom: 30px;
}

.price-amount {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-color);
}

.price-period {
    font-size: 18px;
    color: var(--text-secondary);
}

.pricing-features {
    list-style: none;
    margin-bottom: 30px;
}

.pricing-features li {
    padding: 12px 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

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

/* How to Register Section */
.how-to-register {
    background: white;
}

.register-steps {
    max-width: 800px;
    margin: 0 auto;
}

.register-step {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
    padding: 30px;
    background: var(--bg-secondary);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.register-step:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.register-step-number {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    flex-shrink: 0;
}

.register-step-content h3 {
    font-size: 22px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.register-step-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Registration */
.registration {
    background: white;
}

.registration-content {
    max-width: 800px;
    margin: 0 auto;
}

.contact-form {
    background: var(--bg-secondary);
    padding: 40px;
    border-radius: 16px;
    margin-bottom: 40px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

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

.form-note {
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 16px;
}

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

.contact-info {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 20px;
    padding: 30px;
    background: var(--bg-secondary);
    border-radius: 12px;
}

.contact-item {
    text-align: center;
    color: var(--text-secondary);
}

.contact-item strong {
    display: block;
    color: var(--text-primary);
    margin-bottom: 4px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: white;
    margin: 10% auto;
    padding: 40px;
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    position: relative;
    animation: slideDown 0.3s ease;
}

.close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 28px;
    font-weight: bold;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.3s ease;
}

.close:hover {
    color: var(--text-primary);
}

.modal-content h2 {
    margin-bottom: 24px;
    color: var(--text-primary);
}

/* Standalone Pages */
.page-hero {
    padding: 150px 0 70px;
    text-align: center;
}

.page-hero .section-title {
    font-size: 44px;
    margin-bottom: 12px;
}

.page-hero .section-description {
    font-size: 18px;
    color: var(--text-secondary);
}

.page-content {
    max-width: 960px;
    margin: 0 auto;
    padding: 40px 20px 120px;
}

/* FAQ */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 30px;
}

.faq-item {
    background: var(--bg-primary);
    border-radius: 18px;
    padding: 28px 32px;
    border: 1px solid rgba(0, 102, 255, 0.12);
    box-shadow: 0 20px 45px rgba(15, 23, 42, 0.08);
    position: relative;
    overflow: hidden;
}

.faq-item::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 18px;
    padding: 1px;
    background: linear-gradient(120deg, rgba(0, 102, 255, 0.2), rgba(118, 75, 162, 0.15));
    -webkit-mask:
        linear-gradient(#fff 0 0) content-box,
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
}

.faq-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 25px 50px rgba(15, 23, 42, 0.12);
}

.faq-question {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.faq-answer {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 16px;
}

.faq-answer br {
    content: '';
    display: block;
    margin-bottom: 6px;
}

/* Legal Content */
.legal-text {
    background: white;
    border-radius: 20px;
    padding: 40px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
}

.legal-text h2 {
    font-size: 22px;
    margin-top: 32px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.legal-text h2:first-of-type {
    margin-top: 0;
}

.legal-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.7;
}

.legal-text ul {
    padding-left: 20px;
    margin-bottom: 20px;
    color: var(--text-secondary);
}

.legal-text li {
    margin-bottom: 8px;
    line-height: 1.6;
}

.legal-text strong {
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .page-hero {
        padding-top: 120px;
    }

    .faq-item {
        padding: 24px;
    }

    .legal-text {
        padding: 28px;
    }
}

/* Footer */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
}

.footer-logo {
    font-size: 24px;
    font-weight: 700;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

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

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

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

.pricing-card .btn {
    background: var(--primary-color);
    color: white;
    border: 2px solid var(--primary-color);
}

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

.aurora-background {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background: radial-gradient(ellipse at top left, rgba(0, 102, 255, 0.22), transparent 60%),
                radial-gradient(ellipse at bottom right, rgba(102, 126, 234, 0.22), transparent 60%),
                radial-gradient(circle at 30% 70%, rgba(118, 75, 162, 0.22), transparent 60%);
    filter: blur(65px);
}

/* Responsive Design */
@media (max-width: 968px) {
    .hamburger {
        display: flex;
        z-index: 1001;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: left 0.3s ease-in-out;
        box-shadow: var(--shadow-lg);
        padding: 30px 0;
        gap: 0;
        max-height: calc(100vh - 70px);
        overflow-y: auto;
    }
    
    .nav-menu li {
        width: 100%;
        padding: 16px 0;
    }
    
    .menu-toggle:checked ~ .nav-menu {
        left: 0;
    }
    
    .menu-toggle:checked ~ .hamburger span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .menu-toggle:checked ~ .hamburger span:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle:checked ~ .hamburger span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .features-grid-2x2 {
        grid-template-columns: 1fr;
    }
    
    .calculation-content {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .steps {
        flex-direction: column;
    }
    
    .step-arrow {
        display: none;
    }

}

@media (max-width: 640px) {
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .hero-stats {
        gap: 30px;
    }
    
    .calculation-features {
        grid-template-columns: 1fr;
    }
    
    .register-step {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
}