:root {
    --primary-purple: #6B46C1;
    --primary-blue: #2563EB;
    --dark-purple: #4C1D95;
    --dark-blue: #1E40AF;
    --light-purple: #8B5CF6;
    --light-blue: #3B82F6;
    --white: #FFFFFF;
    --light-gray: #F9FAFB;
    --gray: #6B7280;
    --dark-gray: #1F2937;
    --border: #E5E7EB;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--dark-gray);
    background: var(--white);
}

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

/* Header */
header {
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

header .logo h1 {
    color: var(--primary-purple);
    font-size: 1.5rem;
    font-weight: 700;
}

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

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

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

/* Hero Section */
.hero {
    background: var(--primary-purple);
    color: var(--white);
    padding: 6rem 0;
    text-align: center;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-content .lead {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

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

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

/* Features Section */
.features {
    padding: 5rem 0;
    background: var(--light-gray);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--dark-gray);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.feature-card:hover {
    box-shadow: 0 4px 12px rgba(107, 70, 193, 0.1);
    transform: translateY(-4px);
}

.feature-card .icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    color: var(--primary-purple);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

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

/* How It Works Section */
.how-it-works {
    padding: 5rem 0;
    background: var(--white);
}

.how-it-works h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--dark-gray);
}

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

.step {
    display: flex;
    gap: 2rem;
    margin-bottom: 2.5rem;
    align-items: flex-start;
}

.step-number {
    background: var(--primary-blue);
    color: var(--white);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content h3 {
    color: var(--primary-purple);
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.step-content p {
    color: var(--gray);
    line-height: 1.6;
}

/* Security Section */
.security {
    background: var(--primary-blue);
    color: var(--white);
    padding: 5rem 0;
}

.security-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.security-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.security-content p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.security-features {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    text-align: left;
}

.security-features li {
    background: rgba(255, 255, 255, 0.1);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.security-features li:before {
    content: "✓ ";
    font-weight: 700;
    margin-right: 0.5rem;
}

/* Download Section */
.download {
    padding: 5rem 0;
    background: var(--light-gray);
    text-align: center;
}

.download h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--dark-gray);
}

.download .lead {
    font-size: 1.125rem;
    color: var(--gray);
    margin-bottom: 2.5rem;
}

.download-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.store-button {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--dark-gray);
    color: var(--white);
    padding: 0.875rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

.store-button:hover {
    background: var(--primary-purple);
    transform: translateY(-2px);
}

.store-button img {
    height: 24px;
}

/* Contact Section */
.contact {
    padding: 5rem 0;
    background: var(--white);
}

.contact-card {
    max-width: 600px;
    margin: 0 auto;
    background: var(--white);
    padding: 3rem;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    border: 1px solid var(--border);
}

.contact-card h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--dark-gray);
}

.contact-card > p {
    text-align: center;
    color: var(--gray);
    margin-bottom: 2rem;
}

.form-row {
    margin-bottom: 1.25rem;
}

.form-row input,
.form-row textarea {
    width: 100%;
    padding: 0.875rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s;
}

.form-row input:focus,
.form-row textarea:focus {
    outline: none;
    border-color: var(--primary-purple);
    box-shadow: 0 0 0 3px rgba(107, 70, 193, 0.1);
}

.form-row textarea {
    resize: vertical;
}

.contact-card button {
    width: 100%;
}

.form-message {
    margin-top: 1rem;
    padding: 0.875rem;
    border-radius: 8px;
    display: none;
    text-align: center;
}

.form-message.success {
    background: #D1FAE5;
    color: #065F46;
    display: block;
}

.form-message.error {
    background: #FEE2E2;
    color: #991B1B;
    display: block;
}

/* Footer */
footer {
    background: var(--dark-gray);
    color: var(--white);
    padding: 3rem 0 1.5rem;
}

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

.footer-section h3 {
    color: var(--light-purple);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.footer-section h4 {
    color: var(--white);
    margin-bottom: 1rem;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

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

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

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section ul li a:hover {
    color: var(--light-purple);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

/* Responsive */
@media (max-width: 768px) {
    header .nav-links {
        display: none;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content .lead {
        font-size: 1rem;
    }
    
    .features h2,
    .how-it-works h2,
    .security-content h2,
    .download h2 {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .step {
        gap: 1rem;
    }
    
    .contact-card {
        padding: 2rem 1.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .cta-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .cta-buttons .btn {
        width: 100%;
    }
}