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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: #f9fafb;
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

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

/* Enhanced Logo Styles */
.nav-logo {
    position: relative;
}

.nav-logo h2 {
    color: #2563eb;
    font-weight: 700;
    font-size: 1.8rem;
    background: linear-gradient(135deg, #2563eb, #1d4ed8, #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    letter-spacing: -0.02em;
    transition: all 0.3s ease;
}

.nav-logo h2::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #2563eb, #3b82f6);
    transition: width 0.3s ease;
}

.nav-logo:hover h2::after {
    width: 100%;
}

.nav-logo h2::before {
    content: '';
    position: absolute;
    top: -2px;
    right: -8px;
    width: 6px;
    height: 6px;
    background: #3b82f6;
    border-radius: 50%;
    opacity: 0.8;
}

/* Alternative: Geometric accent logo */
.logo-with-icon {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    border-radius: 6px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon::before {
    content: '\f07a';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: white;
    font-size: 14px;
}

.logo-icon.store::before {
    content: '\f54e';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: white;
    font-size: 14px;
}

.logo-icon.chart::before {
    content: '\f201';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: white;
    font-size: 14px;
}

.logo-icon.box::before {
    content: '\f466';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: white;
    font-size: 14px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #2563eb;
}

.nav-menu a.active {
    color: #2563eb;
    font-weight: 600;
    position: relative;
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, #2563eb, #3b82f6);
    border-radius: 1px;
}

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: #fff;
    color: #2563eb;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #2563eb;
}

.btn-outline {
    background: transparent;
    color: #2563eb;
    border: 2px solid #2563eb;
}

.btn-outline:hover {
    background: #2563eb;
    color: white;
}

.dashboard-preview {
    background: rgba(255,255,255,0.1);
    border-radius: 20px;
    padding: 4rem;
    text-align: center;
    backdrop-filter: blur(10px);
}

.dashboard-preview i {
    font-size: 6rem;
    opacity: 0.8;
}

/* Overview Section */
.overview {
    padding: 80px 0;
    background: #f8fafc;
}

.overview h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #1e293b;
}

.overview-text {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Features Section */
.features {
    padding: 80px 0;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #1e293b;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.feature-icon i {
    font-size: 1.5rem;
    color: white;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: #1e293b;
}

.feature-card p {
    color: #64748b;
    line-height: 1.6;
}

/* Benefits Section */
.benefits {
    padding: 80px 0;
    background: #f8fafc;
}

.benefits h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #1e293b;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.benefit-item {
    text-align: center;
    padding: 2rem;
}

.benefit-item i {
    font-size: 3rem;
    color: #2563eb;
    margin-bottom: 1rem;
}

.benefit-item h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: #1e293b;
}

.benefit-item p {
    color: #64748b;
}

/* Pricing Section */
.pricing {
    padding: 80px 0;
}

.pricing h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #1e293b;
}

.pricing-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: #64748b;
    margin-bottom: 3rem;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.pricing-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
    position: relative;
}

.pricing-card.featured {
    transform: scale(1.05);
    border: 2px solid #2563eb;
}

.pricing-card.featured::before {
    content: 'Most Popular';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: #2563eb;
    color: white;
    padding: 5px 20px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

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

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-5px);
}

.pricing-card.selected {
    border: 2px solid #10b981;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.15);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(16, 185, 129, 0.02) 100%);
}

.pricing-card.selected .pricing-header h3 {
    color: #10b981;
}

.pricing-card.selected::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, #10b981, #059669);
    border-radius: 12px;
    z-index: -1;
    opacity: 0.1;
}

.pricing-card.selected .pricing-footer .btn {
    background: #10b981;
    border-color: #10b981;
    color: white;
}

.pricing-card.selected .pricing-footer .btn:hover {
    background: #059669;
    border-color: #059669;
}

/* Featured card when selected - special handling */
.pricing-card.featured.selected {
    border: 2px solid #10b981;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(16, 185, 129, 0.02) 100%);
}

.pricing-card.featured.selected::before {
    content: 'Most Popular';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: white;
    color: white;
    padding: 5px 20px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    z-index: 2;
}

.pricing-card.featured.selected::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.08) 0%, rgba(16, 185, 129, 0.03) 100%);
    border-radius: 10px;
    z-index: -1;
}

.pricing-header h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #1e293b;
}

.price {
    display: flex;
    align-items: baseline;
    margin-bottom: 0.5rem;
}

.currency {
    font-size: 1.25rem;
    color: #64748b;
}

.amount {
    font-size: 3rem;
    font-weight: 700;
    color: #1e293b;
}

.period {
    font-size: 1rem;
    color: #64748b;
    margin-left: 0.25rem;
}

.price-description {
    color: #64748b;
    margin-bottom: 2rem;
}

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

.pricing-features li {
    padding: 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pricing-features i {
    color: #10b981;
    font-size: 0.875rem;
}

.pricing-footer {
    text-align: center;
}

/* Service Fees */
.service-fees {
    background: #f8fafc;
    padding: 3rem;
    border-radius: 12px;
    margin-top: 3rem;
}

.service-fees h3 {
    text-align: center;
    font-size: 1.75rem;
    margin-bottom: 2rem;
    color: #1e293b;
}

.fees-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.fee-item {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.fee-item h4 {
    color: #1e293b;
    margin-bottom: 1rem;
}

.fee-item p {
    color: #64748b;
    line-height: 1.6;
}

/* Cost Calculator */
.cost-calculator {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.cost-calculator h4 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #1e293b;
}

.calculator-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    align-items: end;
}

.input-group {
    display: flex;
    flex-direction: column;
}

.input-group label {
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #374151;
}

.input-group input {
    padding: 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 1rem;
}

.calculator-result {
    text-align: center;
    padding: 1rem;
    background: #f0f9ff;
    border-radius: 6px;
}

.calculator-result p {
    font-size: 1.1rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.calculator-result .note {
    font-size: 0.875rem;
    color: #64748b;
    font-weight: normal;
}

#apiCost {
    color: #2563eb;
}

/* Privacy Section */
.privacy {
    padding: 80px 0;
    background: #f8fafc;
}

.privacy h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #1e293b;
}

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

/* Data Privacy Notice */
.data-privacy-notice {
    margin: 2rem 0 0 0;
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    border-radius: 8px;
    border-left: 3px solid #2563eb;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.privacy-content {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    max-width: 900px;
    margin: 0 auto;
}

.privacy-content i {
    color: #2563eb;
    font-size: 1.2rem;
    margin-top: 0.1rem;
    flex-shrink: 0;
}

.privacy-content p {
    margin: 0;
    color: #64748b;
    font-size: 0.9rem;
    line-height: 1.5;
    font-weight: 500;
}

.privacy-section {
    background: white;
    padding: 2rem;
    margin-bottom: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.privacy-section h3 {
    color: #1e293b;
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.privacy-section p {
    color: #64748b;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.privacy-section ul {
    color: #64748b;
    line-height: 1.6;
    padding-left: 1.5rem;
}

.privacy-section li {
    margin-bottom: 0.5rem;
}

.privacy-update {
    text-align: center;
    font-style: italic;
    color: #64748b;
    margin-top: 2rem;
}

/* Contact Section */
.contact {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.contact h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact p {
    font-size: 1.1rem;
    margin-bottom: 3rem;
    opacity: 0.9;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 1.1rem;
}

.contact-item i {
    font-size: 1.25rem;
}

/* Footer */
.footer {
    background: #1e293b;
    color: white;
    padding: 3rem 0 1rem;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0,0,0,0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .contact-info {
        flex-direction: column;
        gap: 1rem;
    }
    
    .calculator-form {
        grid-template-columns: 1fr;
    }

    data-privacy-notice {
        margin: 1.5rem 0 0 0;
        padding: 1.25rem 1.5rem;
    }

    .privacy-content {
        gap: 0.5rem;
    }

    .privacy-content p {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .features h2,
    .pricing h2,
    .contact h2 {
        font-size: 2rem;
    }
    
    .container {
        padding: 0 15px;
    }
}

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

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

.feature-card,
.benefit-item,
.pricing-card {
    animation: fadeInUp 0.6s ease forwards;
}

/* SAIN3 Logo Styles */
.logo {
    font-family: 'Inter', sans-serif;
    font-weight: 700;
    font-size: 2rem;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.logo::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, #2563eb, transparent);
}

/* Alternative geometric logo */
.logo-geometric {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}