/* Reset and base styles */
*, *::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: #6366f1;
    --color-primary-hover: #818cf8;
    --color-accent: #22c55e;
    --color-border: #27272a;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', Menlo, monospace;
    --max-width: 1200px;
    --radius: 12px;
    --radius-sm: 8px;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

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

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    letter-spacing: -0.01em;
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.25rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

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

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

.btn-secondary {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

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

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

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

.btn-large {
    padding: 16px 32px;
    font-size: 1.125rem;
}

/* Navigation */
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 1.125rem;
}

.nav-icon {
    width: 32px;
    height: 32px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: color 0.2s ease;
}

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

/* Hero */
.hero {
    min-height: 100vh;
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px 120px;
    text-align: center;
    position: relative;
}

.hero h1 {
    margin-bottom: 24px;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: var(--color-text-muted);
    max-width: 640px;
    margin: 0 auto 40px;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 80px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 64px;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Features */
.features {
    padding: 120px 0;
    background: var(--color-bg-secondary);
}

.features h2 {
    text-align: center;
    margin-bottom: 64px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--color-primary);
}

.feature-card h3 {
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

/* How It Works */
.how-it-works {
    padding: 120px 0;
    background: var(--color-bg);
}

.how-it-works h2 {
    text-align: center;
    margin-bottom: 64px;
}

.steps {
    max-width: 720px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: 24px;
    padding: 32px 0;
    border-bottom: 1px solid var(--color-border);
}

.step:last-child {
    border-bottom: none;
}

.step-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    font-family: var(--font-mono);
}

.step-content h3 {
    margin-bottom: 8px;
}

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

/* Privacy Section */
.privacy {
    padding: 120px 0;
    background: var(--color-bg-secondary);
}

.privacy-content {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
}

.privacy h2 {
    margin-bottom: 16px;
}

.privacy > .container > .privacy-content > p {
    color: var(--color-text-muted);
    margin-bottom: 40px;
}

.privacy-list {
    list-style: none;
    text-align: left;
    display: inline-block;
}

.privacy-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 1.0625rem;
}

.privacy-list svg {
    color: var(--color-accent);
    flex-shrink: 0;
}

/* CTA Section */
.cta {
    padding: 120px 0;
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-secondary) 100%);
    text-align: center;
}

.cta h2 {
    margin-bottom: 16px;
}

.cta p {
    color: var(--color-text-muted);
    margin-bottom: 32px;
    font-size: 1.125rem;
}

/* Footer */
.footer {
    padding: 48px 0;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
}

.footer-icon {
    width: 24px;
    height: 24px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s ease;
}

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

.footer-copyright {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

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

    .hero-stats {
        flex-direction: column;
        gap: 32px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .step {
        flex-direction: column;
        text-align: center;
    }

    .step-number {
        margin: 0 auto;
    }

    .footer-content {
        flex-direction: column;
        gap: 24px;
    }

    .privacy-list {
        padding: 0 24px;
    }
}