/* Reset and Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-bg: #0a0a0b;
    --color-bg-secondary: #111113;
    --color-bg-tertiary: #1a1a1d;
    --color-text: #e4e4e7;
    --color-text-muted: #a1a1aa;
    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --color-accent: #10b981;
    --color-border: #27272a;
    --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --max-width: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
}

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

/* Typography */
h1, h2, h3, h4 {
    line-height: 1.2;
    font-weight: 600;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; margin-bottom: var(--spacing-md); }
h3 { font-size: 1.25rem; }

code {
    font-family: var(--font-mono);
    background-color: var(--color-bg-tertiary);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
}

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

a:hover {
    text-decoration: underline;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn:hover {
    text-decoration: none;
}

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

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

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

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

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.btn-outline:hover {
    background-color: var(--color-bg-tertiary);
}

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(10, 10, 11, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
}

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

.logo {
    font-weight: 600;
    font-size: 1.25rem;
}

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

.nav-links a {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.nav-links a:hover {
    color: var(--color-text);
    text-decoration: none;
}

/* Hero */
.hero {
    padding: calc(var(--spacing-xl) + 60px) 0 var(--spacing-xl);
    text-align: center;
    background: linear-gradient(to bottom, var(--color-bg-secondary), var(--color-bg));
}

.hero h1 {
    max-width: 900px;
    margin: 0 auto var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

/* Sections */
section {
    padding: var(--spacing-xl) 0;
}

.section-lead {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
}

/* Problem Section */
.problem {
    background-color: var(--color-bg-secondary);
}

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

.problem-card {
    background-color: var(--color-bg-tertiary);
    padding: var(--spacing-md);
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

.problem-card h3 {
    margin-bottom: var(--spacing-xs);
}

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

.problem-conclusion {
    font-size: 1.1rem;
    text-align: center;
}

/* Solution Section */
.solution-tagline {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    color: var(--color-accent);
}

.solution-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
}

.feature {
    text-align: center;
    padding: var(--spacing-md);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-sm);
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 1.5rem;
    color: var(--color-primary);
}

.feature h3 {
    margin-bottom: var(--spacing-xs);
}

.feature p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

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

.steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.step {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    background-color: var(--color-bg-tertiary);
    padding: var(--spacing-md);
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

.step-number {
    width: 40px;
    height: 40px;
    background-color: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

.step-content h3 {
    margin-bottom: var(--spacing-xs);
}

.step-content code {
    display: inline-block;
    margin-bottom: var(--spacing-xs);
}

.step-content p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* Compliance */
.badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.badge {
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
}

.crypto-standards {
    max-width: 600px;
    margin: 0 auto;
    text-align: left;
}

.crypto-standards h3 {
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.crypto-standards ul {
    list-style: none;
}

.crypto-standards li {
    padding: var(--spacing-xs) 0;
    color: var(--color-text-muted);
    padding-left: 1.5rem;
    position: relative;
}

.crypto-standards li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-family: var(--font-mono);
}

/* Pricing */
.pricing {
    background-color: var(--color-bg-secondary);
    text-align: center;
}

.price-card {
    max-width: 500px;
    margin: 0 auto;
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: var(--spacing-lg);
}

.price {
    margin-bottom: var(--spacing-sm);
}

.price .currency {
    font-size: 2rem;
    vertical-align: top;
}

.price .amount {
    font-size: 4rem;
    font-weight: 700;
}

.price .per {
    font-size: 1.25rem;
    color: var(--color-text-muted);
}

.price-tagline {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

.price-features {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.price-features li {
    padding: var(--spacing-xs) 0;
    color: var(--color-text-muted);
}

.price-features li::before {
    content: '> ';
    color: var(--color-accent);
    font-family: var(--font-mono);
}

.price-example {
    background-color: var(--color-bg);
    padding: var(--spacing-sm);
    border-radius: 6px;
    margin-bottom: var(--spacing-md);
    font-family: var(--font-mono);
}

.price-note {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.enterprise-note {
    margin-top: var(--spacing-md);
    color: var(--color-text-muted);
}

/* Integration */
.code-block {
    max-width: 600px;
    margin: 0 auto var(--spacing-md);
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
}

.code-header {
    background-color: var(--color-border);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.code-block pre {
    padding: var(--spacing-md);
    overflow-x: auto;
}

.code-block code {
    background: none;
    padding: 0;
    font-size: 0.9rem;
}

.integration-note {
    text-align: center;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.sdk-list {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.sdk-list span {
    color: var(--color-text-muted);
}

/* CTA */
.cta {
    background: linear-gradient(to bottom, var(--color-bg), var(--color-bg-secondary));
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.cta h2 {
    margin-bottom: var(--spacing-sm);
}

.cta p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

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

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

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

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

.footer-col {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-col h4 {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.footer-col a {
    color: var(--color-text);
    font-size: 0.95rem;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }

    .nav-links {
        display: none;
    }

    .hero {
        padding-top: calc(var(--spacing-lg) + 60px);
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    section {
        padding: var(--spacing-lg) 0;
    }

    .footer-content {
        flex-direction: column;
    }

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