:root {
    /* Colors */
    --primary: #4F46E5; /* Indigo 600 */
    --primary-hover: #4338CA; /* Indigo 700 */
    --secondary: #F3F4F6; /* Gray 100 */
    --secondary-hover: #E5E7EB; /* Gray 200 */
    --text-main: #111827; /* Gray 900 */
    --text-muted: #6B7280; /* Gray 500 */
    --bg-white: #FFFFFF;
    --bg-light: #F9FAFB; /* Gray 50 */
    --border: #E5E7EB; /* Gray 200 */
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    /* Transitions */
    --transition: all 0.3s ease;
    
    /* Gradients */
    --gradient-hero: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    --gradient-orb-1: radial-gradient(circle at 50% 50%, rgba(79, 70, 229, 0.4) 0%, rgba(79, 70, 229, 0) 50%);
    --gradient-orb-2: radial-gradient(circle at 50% 50%, rgba(236, 72, 153, 0.3) 0%, rgba(236, 72, 153, 0) 50%);
    --gradient-orb-3: radial-gradient(circle at 50% 50%, rgba(6, 182, 212, 0.3) 0%, rgba(6, 182, 212, 0) 50%);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text-main);
    line-height: 1.6;
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    display: block;
}

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

ul {
    list-style: none;
}

/* Layout */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    text-align: center;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--secondary);
    color: var(--text-main);
}

.btn-secondary:hover {
    background-color: var(--secondary-hover);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    padding: var(--spacing-sm) 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-main);
}

.logo img {
    height: 32px;
    width: 32px;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-title {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-main);
}

.logo-subtitle {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav a:not(.btn) {
    color: var(--text-muted);
    font-weight: 500;
}

.nav a:not(.btn):hover {
    color: var(--text-main);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: var(--spacing-xl) 0;
    overflow: hidden;
    position: relative;
    background-color: var(--bg-white);
    background-image: 
        linear-gradient(rgba(79, 70, 229, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(79, 70, 229, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
}

.hero-bg-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
}

.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
    animation: float 20s infinite ease-in-out;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--gradient-orb-1);
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: var(--gradient-orb-2);
    bottom: -100px;
    left: -100px;
    animation-delay: -5s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: var(--gradient-orb-3);
    top: 40%;
    left: 40%;
    animation-delay: -10s;
    transform: translate(-50%, -50%);
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -50px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

.hero-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    background: rgba(79, 70, 229, 0.08);
    color: var(--primary);
    font-weight: 600;
    font-size: 0.875rem;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-sm);
    border: 1px solid rgba(79, 70, 229, 0.2);
    box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.1);
    animation: fadeInDown 0.8s ease-out;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    line-height: 1.1;
    font-weight: 800;
    letter-spacing: -0.025em;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(to right, var(--text-main), var(--primary), #ec4899);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientText 5s ease infinite;
}

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

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin: 0 auto var(--spacing-md);
    max-width: 800px;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

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

/* Carousel Section */
.carousel-section {
    padding-bottom: var(--spacing-xl);
    background-color: var(--bg-white);
}

.carousel {
    position: relative;
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

.carousel-inner {
    display: flex;
    transition: transform 0.5s ease-in-out;
}

.carousel-item {
    min-width: 100%;
    box-sizing: border-box;
}

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

.carousel-control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.8);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-main);
    transition: var(--transition);
    z-index: 10;
}

.carousel-control:hover {
    background: white;
    box-shadow: var(--shadow-md);
}

.carousel-control.prev {
    left: var(--spacing-sm);
}

.carousel-control.next {
    right: var(--spacing-sm);
}

.carousel-indicators {
    position: absolute;
    bottom: var(--spacing-sm);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--spacing-xs);
    z-index: 10;
}

.indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.indicator.active {
    background: white;
    transform: scale(1.2);
}

/* Features Section */
.features {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-light);
}

.section-header {
    text-align: center;
    max-width: 768px;
    margin: 0 auto var(--spacing-lg);
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-muted);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

@media (min-width: 1200px) {
    .features-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

.feature-card {
    background: var(--bg-white);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.05) 0%, rgba(236, 72, 153, 0.05) 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 0;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    border-color: rgba(79, 70, 229, 0.3);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.feature-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0e7ff 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
    transition: transform 0.4s ease;
    box-shadow: 0 2px 4px rgba(79, 70, 229, 0.1);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
    background: linear-gradient(135deg, var(--primary) 0%, #4338CA 100%);
    color: white;
}

.feature-icon svg {
    width: 22px;
    height: 22px;
}

.feature-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0;
    line-height: 1.3;
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.feature-card p {
    color: var(--text-muted);
}

/* How It Works */
.how-it-works {
    padding: var(--spacing-xl) 0;
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.step {
    text-align: center;
    position: relative;
}

.step-number {
    font-size: 4rem;
    font-weight: 900;
    color: var(--secondary);
    line-height: 1;
    margin-bottom: -1.5rem;
    position: relative;
    z-index: -1;
}

.step h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.step p {
    color: var(--text-muted);
}

/* CTA Section */
.cta-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--primary);
    color: white;
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.cta-content p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

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

.cta-content .btn:hover {
    background-color: var(--secondary);
}

/* Footer */
.footer {
    padding: var(--spacing-md) 0;
    background-color: var(--bg-white);
    border-top: 1px solid var(--border);
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-logo {
    height: 24px;
    width: 24px;
    filter: grayscale(100%);
    opacity: 0.7;
}

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

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.875rem;
}

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

/* Responsive */
@media (max-width: 968px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        margin: 0 auto var(--spacing-md);
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .steps {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .nav {
        display: none; /* Hide nav on mobile for simplicity in this no-framework demo */
    }
    
    .mobile-menu-btn {
        display: block;
        width: 30px;
        height: 20px;
        position: relative;
    }
    
    .mobile-menu-btn span {
        display: block;
        width: 100%;
        height: 2px;
        background-color: var(--text-main);
        margin-bottom: 5px;
    }
    
    .footer-container {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.show {
    display: flex;
    opacity: 1;
}

.modal-content {
    background-color: var(--bg-white);
    margin: auto;
    padding: 0;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 400px;
    position: relative;
    transform: scale(0.9);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    overflow: hidden;
}

.modal.show .modal-content {
    transform: scale(1);
}

.close-modal {
    color: var(--text-muted);
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    z-index: 10;
    line-height: 1;
    transition: color 0.2s;
}

.close-modal:hover,
.close-modal:focus {
    color: var(--text-main);
    text-decoration: none;
}

.modal-body {
    padding: 2.5rem 2rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.modal-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, #e0e7ff 0%, #f0f9ff 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    margin-bottom: 0.5rem;
    box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.1);
}

.modal-icon svg {
    width: 32px;
    height: 32px;
}

.modal-body h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
}

.modal-body p {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.5;
}

.modal-btn {
    margin-top: 1rem;
    width: 100%;
}