:root {
    --brand: rgb(100, 102, 233);
    --brand-dark: rgb(79, 81, 203);
    --brand-light: rgba(100, 102, 233, 0.1);
    --ink: #111827;
    --ink-light: #374151;
    --muted: #6B7280;
    --surface: #FFFFFF;
    --surface-alt: #F9FAFB;
    --border: #E5E7EB;
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    
    --radius: 0.5rem;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    color: var(--ink);
    line-height: 1.5;
    background-color: var(--surface);
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--brand);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--brand-dark);
}

h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--ink);
}

p {
    margin-bottom: 1rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

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

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--ink);
}

.logo img {
    height: 32px;
}

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

nav a {
    color: var(--ink-light);
    font-weight: 500;
}

nav a:hover {
    color: var(--brand);
}

.nav-cta {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    text-align: center;
}

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

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

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

.btn-outline:hover {
    border-color: var(--brand);
    color: var(--brand);
}

/* Hero Section */
.hero {
    padding: 6rem 0;
    text-align: center;
    background: radial-gradient(circle at top right, var(--brand-light), transparent);
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero p {
    font-size: 1.25rem;
    color: var(--muted);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 2.5rem;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* Features Section */
.section {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

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

.card {
    padding: 2rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.card-icon {
    width: 48px;
    height: 48px;
    background: var(--brand-light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: var(--brand);
}

/* How It Works */
.steps {
    display: flex;
    gap: 3rem;
    margin-top: 3rem;
}

.step {
    flex: 1;
    text-align: center;
    position: relative;
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--brand);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-weight: 700;
}

/* CTA Band */
.cta-band {
    background: var(--ink);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.cta-band h2 {
    color: white;
}

.cta-band p {
    color: var(--muted);
    margin-bottom: 2rem;
}

/* Footer */
footer {
    background: var(--surface-alt);
    padding: 5rem 0 2rem;
    border-top: 1px solid var(--border);
}

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

.footer-logo {
    margin-bottom: 1.5rem;
}

.footer-links h4 {
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
}

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

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

.footer-links a {
    color: var(--ink-light);
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    color: var(--muted);
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-wrapper {
        flex-direction: column;
        gap: 1rem;
    }
    
    nav ul {
        gap: 1rem;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .steps {
        flex-direction: column;
    }
}