/* Global Reset and Variables */
:root {
    /* Colors */
    --primary-blue: #4C7FFF;
    --primary-purple: #7F4CE5;
    --gradient-primary: linear-gradient(135deg, #4C7FFF 0%, #7F4CE5 100%);
    --gradient-hero: linear-gradient(180deg, #F2F7FF 0%, #E0EDFA 100%);
    --gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0.7) 100%);
    
    --bg-light: #F2F7FF;
    --bg-gradient: #E0EDFA;
    --white: #FFFFFF;
    --text-primary: #1A1A2E;
    --text-secondary: #64648C;
    --text-muted: #9999B3;
    --success: #34C759;
    --success-light: #E8F9EC;
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-shadow: 0 8px 32px rgba(76, 127, 255, 0.1);
    
    /* Spacing */
    --section-padding: 100px;
    --container-width: 1200px;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--bg-light);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

ul {
    list-style: none;
}

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

/* Container */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Glassmorphism Card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition-medium);
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: 0 4px 20px rgba(76, 127, 255, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(76, 127, 255, 0.5);
}

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

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

.btn-large {
    padding: 18px 36px;
    font-size: 18px;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

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

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.5);
    transition: var(--transition-medium);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
}

.logo-icon {
    font-size: 28px;
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-menu a {
    font-weight: 500;
    color: var(--text-secondary);
}

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

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

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.floating-math {
    position: absolute;
    font-size: 48px;
    color: rgba(76, 127, 255, 0.1);
    animation: float 20s infinite;
}

.floating-math:nth-child(1) { top: 10%; left: 5%; animation-delay: 0s; }
.floating-math:nth-child(2) { top: 20%; right: 10%; animation-delay: 2s; }
.floating-math:nth-child(3) { top: 40%; left: 8%; animation-delay: 4s; }
.floating-math:nth-child(4) { top: 60%; right: 5%; animation-delay: 6s; }
.floating-math:nth-child(5) { top: 80%; left: 15%; animation-delay: 8s; }
.floating-math:nth-child(6) { top: 30%; right: 20%; animation-delay: 10s; }
.floating-math:nth-child(7) { bottom: 10%; left: 20%; animation-delay: 12s; }
.floating-math:nth-child(8) { bottom: 30%; right: 15%; animation-delay: 14s; }

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
        opacity: 0.1;
    }
    50% {
        transform: translateY(-30px) rotate(10deg);
        opacity: 0.2;
    }
}

.hero-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 60px 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    min-height: calc(100vh - 80px);
}

.hero-content {
    z-index: 1;
}

.hero-title {
    font-size: clamp(48px, 8vw, 72px);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 16px;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-tagline {
    font-size: clamp(20px, 3vw, 28px);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.hero-description {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 500px;
}

.hero-badges {
    margin-bottom: 40px;
}

.app-store-badge {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: var(--text-primary);
    color: var(--white);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    transition: var(--transition-medium);
}

.app-store-badge:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.app-store-badge svg {
    width: 28px;
    height: 28px;
}

.badge-content {
    display: flex;
    flex-direction: column;
}

.badge-small {
    font-size: 10px;
    opacity: 0.8;
}

.badge-large {
    font-size: 20px;
    font-weight: 600;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

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

.stat-number {
    font-size: 32px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* Phone Mockup */
.hero-mockup {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-frame {
    width: 280px;
    height: 580px;
    background: linear-gradient(145deg, #2a2a3e 0%, #1a1a2e 100%);
    border-radius: 45px;
    padding: 12px;
    box-shadow: 
        0 50px 100px rgba(0, 0, 0, 0.3),
        inset 0 2px 10px rgba(255, 255, 255, 0.1);
    animation: phonePulse 4s ease-in-out infinite;
}

@keyframes phonePulse {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--gradient-hero);
    border-radius: 35px;
    overflow: hidden;
    position: relative;
}

.app-preview {
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: 20px;
}

.preview-header {
    text-align: center;
    padding: 20px 0;
}

.preview-title {
    font-size: 20px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.preview-camera {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.camera-frame {
    width: 90%;
    height: 200px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: var(--radius-md);
    border: 3px dashed var(--primary-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: scanPulse 2s infinite;
}

@keyframes scanPulse {
    0%, 100% {
        border-color: var(--primary-blue);
    }
    50% {
        border-color: var(--primary-purple);
    }
}

.math-problem {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    font-family: 'Courier New', monospace;
}

.preview-solution {
    background: var(--success-light);
    border-radius: var(--radius-md);
    padding: 20px;
    text-align: center;
    margin-top: 20px;
}

.solution-label {
    display: block;
    font-size: 12px;
    color: var(--success);
    font-weight: 600;
    margin-bottom: 4px;
}

.solution-text {
    font-size: 28px;
    font-weight: 800;
    color: var(--success);
}

/* ============================================
   FEATURES SECTION
   ============================================ */
.features {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition-medium);
    opacity: 0;
    transform: translateY(30px);
}

.feature-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(76, 127, 255, 0.15);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
    display: inline-block;
    animation: iconBounce 3s ease-in-out infinite;
}

.feature-card:nth-child(2) .feature-icon { animation-delay: 0.5s; }
.feature-card:nth-child(3) .feature-icon { animation-delay: 1s; }
.feature-card:nth-child(4) .feature-icon { animation-delay: 1.5s; }
.feature-card:nth-child(5) .feature-icon { animation-delay: 2s; }
.feature-card:nth-child(6) .feature-icon { animation-delay: 2.5s; }

@keyframes iconBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   HOW IT WORKS SECTION
   ============================================ */
.how-it-works {
    padding: var(--section-padding) 0;
    background: var(--gradient-hero);
}

.steps-container {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.step {
    flex: 1;
    min-width: 200px;
    max-width: 250px;
    text-align: center;
    padding: 30px 20px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    border: 1px solid var(--glass-border);
    position: relative;
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-slow);
}

.step.visible {
    opacity: 1;
    transform: translateY(0);
}

.step-number {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 30px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
}

.step-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.step h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.step p {
    font-size: 14px;
    color: var(--text-secondary);
}

.step-arrow {
    font-size: 24px;
    color: var(--primary-blue);
    align-self: center;
    opacity: 0.5;
}

/* ============================================
   PROBLEM TYPES SECTION
   ============================================ */
.problem-types {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.problem-card {
    background: var(--gradient-hero);
    border-radius: var(--radius-lg);
    padding: 30px;
    text-align: center;
    transition: var(--transition-medium);
    border: 1px solid rgba(76, 127, 255, 0.1);
    opacity: 0;
    transform: scale(0.95);
}

.problem-card.visible {
    opacity: 1;
    transform: scale(1);
}

.problem-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(76, 127, 255, 0.15);
}

.problem-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.problem-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.problem-card p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.problem-example {
    background: var(--white);
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    font-family: 'Courier New', monospace;
    font-size: 16px;
    font-weight: 600;
    color: var(--primary-blue);
}

/* ============================================
   PRICING SECTION
   ============================================ */
.pricing {
    padding: var(--section-padding) 0;
    background: var(--gradient-hero);
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    align-items: center;
}

.pricing-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition-medium);
    border: 1px solid rgba(76, 127, 255, 0.1);
    position: relative;
    opacity: 0;
    transform: translateY(30px);
}

.pricing-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.pricing-card.featured {
    background: var(--gradient-primary);
    color: var(--white);
    transform: scale(1.05);
    z-index: 1;
    box-shadow: 0 30px 60px rgba(76, 127, 255, 0.3);
}

.pricing-card.featured.visible {
    transform: scale(1.05);
}

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

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

.pricing-header h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
}

.price-amount {
    font-size: 48px;
    font-weight: 800;
}

.price-period {
    font-size: 16px;
    opacity: 0.8;
}

.savings {
    display: inline-block;
    margin-top: 10px;
    background: var(--success-light);
    color: var(--success);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

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

.pricing-features li {
    padding: 10px 0;
    font-size: 15px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.pricing-card.featured .pricing-features li {
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

.pricing-card .btn {
    width: 100%;
}

.pricing-card.featured .btn-primary {
    background: var(--white);
    color: var(--primary-blue);
}

/* ============================================
   TESTIMONIALS SECTION
   ============================================ */
.testimonials {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.testimonial-card {
    padding: 30px;
    opacity: 0;
    transform: translateY(30px);
}

.testimonial-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.testimonial-stars {
    font-size: 20px;
    margin-bottom: 16px;
}

.testimonial-text {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    font-size: 32px;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
}

.author-role {
    font-size: 13px;
    color: var(--text-muted);
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta {
    padding: var(--section-padding) 0;
    background: var(--gradient-hero);
}

.cta-content {
    text-align: center;
    padding: 60px 40px;
    max-width: 800px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 800;
    margin-bottom: 16px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cta-content p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.cta-disclaimer {
    margin-top: 20px;
    font-size: 14px;
    color: var(--text-muted);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--text-primary);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-logo .logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
    max-width: 300px;
}

.footer-languages {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.footer-languages span:first-child {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

.lang-badge {
    background: rgba(255, 255, 255, 0.1);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 13px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.footer-column h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--white);
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    transition: var(--transition-fast);
}

.footer-column a:hover {
    color: var(--primary-blue);
}

.footer-column li {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.footer-bottom {
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
    margin-bottom: 8px;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        order: 1;
    }
    
    .hero-mockup {
        order: 2;
    }
    
    .hero-description {
        margin: 0 auto 32px;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .features-grid,
    .problems-grid,
    .pricing-cards,
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-card.featured {
        transform: scale(1);
    }
    
    .pricing-card.featured.visible {
        transform: scale(1);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 30px;
        gap: 20px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition-medium);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .features-grid,
    .problems-grid,
    .pricing-cards,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .steps-container {
        flex-direction: column;
        align-items: center;
    }
    
    .step {
        max-width: 100%;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .phone-frame {
        width: 240px;
        height: 500px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .hero-badges {
        display: flex;
        justify-content: center;
    }
    
    .cta-content {
        padding: 40px 20px;
    }
}

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

.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}

/* Staggered animations */
.feature-card:nth-child(1) { transition-delay: 0.1s; }
.feature-card:nth-child(2) { transition-delay: 0.2s; }
.feature-card:nth-child(3) { transition-delay: 0.3s; }
.feature-card:nth-child(4) { transition-delay: 0.4s; }
.feature-card:nth-child(5) { transition-delay: 0.5s; }
.feature-card:nth-child(6) { transition-delay: 0.6s; }

.step:nth-child(1) { transition-delay: 0.1s; }
.step:nth-child(3) { transition-delay: 0.3s; }
.step:nth-child(5) { transition-delay: 0.5s; }
.step:nth-child(7) { transition-delay: 0.7s; }

.problem-card:nth-child(1) { transition-delay: 0.1s; }
.problem-card:nth-child(2) { transition-delay: 0.2s; }
.problem-card:nth-child(3) { transition-delay: 0.3s; }
.problem-card:nth-child(4) { transition-delay: 0.4s; }
.problem-card:nth-child(5) { transition-delay: 0.5s; }
.problem-card:nth-child(6) { transition-delay: 0.6s; }

.pricing-card:nth-child(1) { transition-delay: 0.1s; }
.pricing-card:nth-child(2) { transition-delay: 0.2s; }
.pricing-card:nth-child(3) { transition-delay: 0.3s; }

.testimonial-card:nth-child(1) { transition-delay: 0.1s; }
.testimonial-card:nth-child(2) { transition-delay: 0.2s; }
.testimonial-card:nth-child(3) { transition-delay: 0.3s; }