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

/* 
 * ANIMATION GUIDE:
 * 
 * 1. KEYFRAME ANIMATIONS (@keyframes):
 *    - fadeInUp: Slides content up from 30px with fade-in
 *    - slideInLeft/Right: Cards slide in from sides
 *    - pulse: Background gradient rotation/pulse
 *    - arrow-bounce: Arrow icon bounces horizontally
 * 
 * 2. TRANSITION PROPERTY:
 *    - Used for smooth hover effects on buttons, cards, icons
 *    - Syntax: transition: property duration easing-function
 *    - Example: transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
 * 
 * 3. ANIMATION PROPERTY:
 *    - Used to apply keyframe animations
 *    - Syntax: animation: name duration timing-function delay fill-mode
 *    - Example: animation: fadeInUp 0.8s ease-out 0.2s backwards;
 * 
 * 4. CUBIC-BEZIER EASING:
 *    - cubic-bezier(0.4, 0, 0.2, 1) - Smooth, natural easing
 *    - Creates professional, polished animations
 */

:root {
    /* Colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-glow: rgba(99, 102, 241, 0.3);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-hero: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border */
    --border-radius: 12px;
    --border-radius-lg: 20px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a0a1a 25%, #0a0a1a 50%, #1a0a0a 75%, #0a0a0a 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.3);
    backdrop-filter: blur(30px) saturate(180%);
    -webkit-backdrop-filter: blur(30px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Buttons */
.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 0.875rem 2rem;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px var(--accent-glow);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0.875rem 2rem;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Hero Section */
.hero {
    padding-top: 100px;
    padding-bottom: var(--spacing-3xl);
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: transparent;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
    animation: pulse 20s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1) rotate(0deg); opacity: 0.5; }
    50% { transform: scale(1.1) rotate(180deg); opacity: 1; }
}

/* Fade in animation for hero content */
.hero-title {
    animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero-form {
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

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

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
}

/* Hero Form */
.hero-form {
    margin-bottom: var(--spacing-3xl);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.btn-hero-cta,
.btn-cta {
    margin: 0 auto;
}

.form-group {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 500px;
    margin-bottom: var(--spacing-sm);
}

.form-group input {
    flex: 1;
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0.875rem 1.25rem;
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group input::placeholder {
    color: var(--text-secondary);
}

.form-note {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Hero Comparison */
.hero-comparison {
    margin-top: var(--spacing-3xl);
    margin-bottom: var(--spacing-3xl);
    padding-bottom: var(--spacing-3xl);
}

.comparison-container {
    display: grid;
    grid-template-columns: 1fr auto 1.5fr;
    gap: var(--spacing-xl);
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    animation: fadeInUp 1s ease-out 0.6s backwards;
}

.comparison-card {
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    padding: 0;
    box-shadow: 
        0 25px 70px rgba(0, 0, 0, 0.6),
        0 15px 40px rgba(0, 0, 0, 0.4),
        0 5px 15px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transform-style: preserve-3d;
    perspective: 1000px;
}

.comparison-card::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.3) 0%, rgba(255, 255, 255, 0.15) 25%, rgba(255, 255, 255, 0.05) 50%, rgba(255, 255, 255, 0.15) 75%, rgba(255, 255, 255, 0.3) 100%);
    border-radius: inherit;
    z-index: -1;
    opacity: 1;
    transition: opacity 0.4s ease;
}

.comparison-card.before {
    max-width: 100%;
}

.comparison-card.after {
    max-width: 100%;
}

.comparison-card.before {
    animation: slideInLeft 0.8s ease-out 0.5s backwards;
}

.comparison-card.after {
    animation: slideInRight 0.8s ease-out 0.5s backwards;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.comparison-card:hover {
    transform: translateY(-6px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 
        0 30px 90px rgba(0, 0, 0, 0.7),
        0 20px 50px rgba(0, 0, 0, 0.5),
        0 10px 25px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.card-label {
    padding: var(--spacing-md) var(--spacing-lg);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.comparison-card.before .card-label {
    color: #ef4444;
}

.comparison-card.after .card-label {
    color: #22c55e;
}

.card-image {
    height: 500px;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 0;
}

.card-image2 {
    min-height: 500px;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 0;
}

.comparison-card.after .card-image2 {
    height: 500px;
    overflow: hidden;
    padding: 0;
}

.comparison-card.after .placeholder-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.placeholder-img {
    width: 100%;
    height: auto;
    display: block;
}

.comparison-arrow {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px var(--accent-glow);
    animation: pulse-arrow 2s ease-in-out infinite;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.comparison-arrow:hover {
    transform: scale(1.15);
    box-shadow: 0 12px 32px var(--accent-glow);
}

@keyframes pulse-arrow {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.comparison-arrow i {
    color: white;
    width: 24px;
    height: 24px;
    animation: arrow-bounce 1.5s ease-in-out infinite;
}

@keyframes arrow-bounce {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(4px); }
}

/* How It Works */
.how-it-works {
    padding: calc(var(--spacing-3xl) + var(--spacing-2xl)) 0 var(--spacing-3xl) 0;
    background: rgba(17, 17, 17, 0.3);
    backdrop-filter: blur(10px);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    letter-spacing: -0.02em;
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.step-card {
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeInUp 0.6s ease-out backwards;
}

.step-card:nth-child(1) {
    animation-delay: 0.1s;
}

.step-card:nth-child(2) {
    animation-delay: 0.2s;
}

.step-card:nth-child(3) {
    animation-delay: 0.3s;
}

.step-card:hover {
    transform: translateY(-12px) scale(1.02);
    border-color: rgba(99, 102, 241, 0.5);
    box-shadow: 0 24px 48px rgba(99, 102, 241, 0.25);
}

.step-card:hover .step-icon {
    transform: scale(1.1) rotate(5deg);
}

.step-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    position: relative;
    overflow: hidden;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.step-icon::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.2) 0%, transparent 70%);
    animation: rotate 3s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.step-icon.magic::before {
    animation-duration: 2s;
}

.step-icon i {
    color: white;
    width: 30px;
    height: 30px;
    z-index: 1;
}

.step-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

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

/* Features Section */
.features {
    padding: var(--spacing-3xl) 0;
    background: transparent;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    padding: var(--spacing-xl);
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-lg);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeInUp 0.6s ease-out backwards;
}

.feature-card:nth-child(1) {
    animation-delay: 0.1s;
}

.feature-card:nth-child(2) {
    animation-delay: 0.2s;
}

.feature-card:nth-child(3) {
    animation-delay: 0.3s;
}

.feature-card:nth-child(4) {
    animation-delay: 0.4s;
}

.feature-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: 0 16px 32px rgba(99, 102, 241, 0.2);
}

.feature-card:hover .feature-icon {
    transform: scale(1.15);
}

.feature-icon {
    width: 50px;
    height: 50px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-icon i {
    color: var(--accent-primary);
    width: 24px;
    height: 24px;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

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

/* CTA Section */
.cta {
    padding: var(--spacing-3xl) 0;
    background: rgba(17, 17, 17, 0.3);
    backdrop-filter: blur(10px);
    text-align: center;
}

.cta-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.cta-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
}

.cta-form {
    max-width: 500px;
    margin: 0 auto var(--spacing-3xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.trust-badges {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
}

.trust-badge {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

/* Testimonials Section */
.testimonials {
    padding: var(--spacing-3xl) 0;
    background: transparent;
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-3xl);
}

.testimonial-card {
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    transition: all 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.3);
}

.testimonial-text {
    font-size: 1.125rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    font-style: italic;
    color: var(--text-primary);
}

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

.author-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.author-role {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.social-proof {
    margin-top: var(--spacing-3xl);
}

.social-text {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.logos {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    flex-wrap: wrap;
}

.logo-item {
    color: var(--text-secondary);
    opacity: 0.6;
    font-weight: 600;
    transition: all 0.3s ease;
}

.logo-item:hover {
    opacity: 1;
    color: var(--accent-primary);
}

/* Footer */
.footer {
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

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

.footer-brand p {
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

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

.link-group h4 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.link-group a {
    display: block;
    color: var(--text-primary);
    text-decoration: none;
    margin-bottom: var(--spacing-xs);
    transition: all 0.3s ease;
}

.link-group a:hover {
    color: var(--accent-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --spacing-3xl: 4rem;
    }
    
    .nav-container {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .btn-secondary {
        display: none;
    }
    
    .hero {
        padding-top: 80px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .form-group {
        flex-direction: column;
    }
    
    .btn-primary {
        width: 100%;
        justify-content: center;
    }
    
    .steps {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .logos {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .comparison-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .comparison-arrow {
        transform: rotate(90deg);
        margin: 0 auto;
    }
    
    .hero-comparison {
        margin-bottom: var(--spacing-2xl);
        padding-bottom: var(--spacing-2xl);
    }
    
    .how-it-works {
        padding: var(--spacing-2xl) 0;
    }
}