:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #8b5cf6;
    --accent-color: #10b981;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --visa-blue: #1A1F71;
    --visa-gold: #F7B600;
    --platinum-gradient: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    --universal-gradient: linear-gradient(135deg, #1A1F71 0%, #2952CC 100%);
}

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

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

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

/* Navigation */
.navbar {
    background: var(--bg-white);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
}

.logo-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
}

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

.mobile-menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Buttons */
.btn-primary, .btn-secondary {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

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

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* Hero Section */
.hero {
    padding: 5rem 0;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    gap: 3rem;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* Virtual Card Showcase */
.card-showcase {
    position: relative;
    height: 400px;
}

.virtual-card {
    width: 350px;
    height: 220px;
    border-radius: 16px;
    padding: 1.5rem;
    color: white;
    position: absolute;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s;
}

.virtual-card:hover {
    transform: translateY(-10px);
}

.virtual-card.universal {
    background: var(--universal-gradient);
}

.virtual-card.platinum {
    background: var(--platinum-gradient);
}

/* Hero section cards with overlapping effect */
.card-showcase .virtual-card.universal {
    position: absolute;
    top: 20px;
    left: 0;
    z-index: 2;
}

.card-showcase .virtual-card.platinum {
    position: absolute;
    top: 100px;
    left: 80px;
    z-index: 1;
}

/* Card types section - no positioning for alignment */
.virtual-card.large {
    width: 100%;
    max-width: 400px;
    height: 240px;
    position: relative;
    margin: 0 auto;
}

.card-chip {
    width: 50px;
    height: 40px;
    background: linear-gradient(135deg, #ffd700 0%, #ffed4e 100%);
    border-radius: 8px;
    margin-bottom: 2rem;
}

.card-type {
    font-size: 1.2rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 1rem;
}

.card-number {
    font-size: 1.5rem;
    letter-spacing: 3px;
    margin-bottom: 1.5rem;
    font-family: 'Courier New', monospace;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.card-holder {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.card-expiry {
    font-size: 0.9rem;
    font-family: 'Courier New', monospace;
}

.card-badges {
    position: absolute;
    bottom: 1.5rem;
    right: 1.5rem;
    display: flex;
    gap: 0.5rem;
    font-size: 1.5rem;
}

/* Sections */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.section-header p {
    font-size: 1.2rem;
    color: var(--text-light);
}

/* Features Grid */
.features {
    background: var(--bg-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 12px;
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

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

/* Card Types Section */
.card-types {
    background: var(--bg-light);
}

.card-types-grid {
    display: flex;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    align-items: flex-start;
}

.card-types-grid > * {
    flex: 1;
}

.card-type-item {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    position: relative;
    display: flex;
    flex-direction: column;
}

.card-type-item.featured {
    border: 3px solid var(--primary-color);
}

.popular-badge {
    position: absolute;
    top: -12px;
    right: 30px;
    background: var(--accent-color);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
    z-index: 10;
}

.card-type-visual {
    margin-bottom: 1.5rem;
    min-height: 260px;
    display: flex;
    align-items: center;
}

.card-type-item h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
    font-weight: 700;
}

.card-type-description {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    line-height: 1.6;
}

.card-features-list {
    list-style: none;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.card-features-list li {
    padding: 0.6rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-dark);
    font-size: 0.95rem;
    line-height: 1.4;
}

.card-features-list i.fa-check {
    color: var(--accent-color);
}

.card-features-list i.fa-times {
    color: var(--text-light);
}

.card-pricing {
    padding-top: 1.5rem;
    border-top: 2px solid var(--border-color);
    text-align: center;
}

.price {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* How It Works */
.how-it-works {
    background: var(--bg-white);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

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

.step-number {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.step-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: white;
    margin: 2rem auto 1.5rem;
}

.step h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

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

/* Sandbox Section */
.sandbox {
    background: var(--bg-light);
}

.sandbox-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.sandbox-info h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.sandbox-info p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.sandbox-features {
    margin-bottom: 2rem;
}

.sandbox-feature {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 0;
    color: var(--text-dark);
}

.sandbox-feature i {
    color: var(--accent-color);
    font-size: 1.2rem;
}

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

.code-preview {
    background: #1e293b;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.code-header {
    background: #0f172a;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #334155;
}

.code-title {
    color: #94a3b8;
    font-size: 0.9rem;
    font-weight: 600;
}

.copy-btn {
    background: transparent;
    border: 1px solid #475569;
    color: #94a3b8;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.copy-btn:hover {
    background: #334155;
    color: white;
}

.code-preview pre {
    padding: 1.5rem;
    margin: 0;
    overflow-x: auto;
}

.code-preview code {
    color: #e2e8f0;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
}

/* API Section */
.api-section {
    background: var(--bg-white);
}

.api-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.api-feature {
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 12px;
    text-align: center;
}

.api-feature i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.api-feature h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.api-feature p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.api-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: gap 0.3s;
}

.api-link:hover {
    gap: 1rem;
}

/* FAQ Section */
.faq {
    background: var(--bg-white);
}

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

.faq-item {
    background: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 1.5rem;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
}

.faq-question {
    padding: 1.5rem 2rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-light);
    transition: background 0.3s ease;
}

.faq-question:hover {
    background: #f0f4ff;
}

.faq-question h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
    margin: 0;
    padding-right: 2rem;
    line-height: 1.4;
}

.faq-toggle {
    font-size: 1.8rem;
    font-weight: 300;
    color: var(--primary-color);
    transition: transform 0.3s ease;
    flex-shrink: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
    background: var(--primary-color);
    color: white;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 2rem;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 1.5rem 2rem 2rem;
}

.faq-answer p {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 1rem;
    margin: 0;
}

/* Use Cases */
.use-cases {
    background: var(--bg-light);
}

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

.use-case {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s;
}

.use-case:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.use-case-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    margin: 0 auto 1.5rem;
}

.use-case h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.use-case p {
    color: var(--text-light);
}

/* CTA Section */
.cta {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    text-align: center;
}

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

.cta p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

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

.cta .btn-primary:hover {
    background: var(--bg-light);
}

.cta .btn-secondary {
    border-color: white;
    color: white;
}

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

.cta-info {
    display: flex;
    gap: 3rem;
    justify-content: center;
    margin-top: 2rem;
}

.cta-info-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.1rem;
}

/* Footer */
.footer {
    background: #2d3748;
    color: #a0aec0;
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: #ffffff;
}

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

.footer-section ul li {
    margin-bottom: 0.75rem;
}

.footer-section a {
    color: #a0aec0;
    text-decoration: none;
    transition: color 0.3s;
    font-size: 0.95rem;
}

.footer-section a:hover {
    color: #ffffff;
}

.footer-section i {
    margin-right: 0.5rem;
    color: #718096;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    margin-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #718096;
    font-size: 0.9rem;
}

.footer-bottom a {
    color: #4299e1;
    text-decoration: none;
}

.footer-bottom a:hover {
    color: #63b3ed;
}

/* Responsive Design */
@media (max-width: 968px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    .card-types-grid {
        flex-direction: column;
        gap: 2rem;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .card-showcase {
        height: 300px;
        margin-top: 2rem;
    }
    
    .virtual-card {
        width: 300px;
        height: 190px;
    }
    
    .card-showcase .virtual-card.platinum {
        left: 50px;
    }
    
    .sandbox-content {
        grid-template-columns: 1fr;
    }
    
    .card-types-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-info {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 640px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .card-showcase {
        height: 250px;
    }
    
    .virtual-card {
        width: 280px;
        height: 180px;
    }
    
    .card-showcase .virtual-card.platinum {
        left: 30px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* WhatsApp Floating Button */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: #25D366;
    color: white;
    padding: 15px 25px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    transition: all 0.3s ease;
    z-index: 999;
}

.whatsapp-float:hover {
    background: #20BA5A;
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(37, 211, 102, 0.5);
}

.whatsapp-float i {
    font-size: 1.5rem;
}

.whatsapp-float span {
    font-size: 0.95rem;
}

@media (max-width: 640px) {
    .whatsapp-float {
        bottom: 20px;
        right: 20px;
        padding: 12px 20px;
        font-size: 0.9rem;
    }
    
    .whatsapp-float i {
        font-size: 1.3rem;
    }
    
    .whatsapp-float span {
        font-size: 0.85rem;
    }
}