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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --text: #1f2937;
    --text-muted: #6b7280;
    --bg: #ffffff;
    --bg-alt: #f9fafb;
    --border: #e5e7eb;
}

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

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

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
}

.logo-icon {
    font-size: 1.5rem;
}

.nav-cta {
    padding: 0.5rem 1rem;
    background: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: background 0.2s;
}

.nav-cta:hover {
    background: var(--primary-dark);
}

/* Main */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Hero */
.hero {
    text-align: center;
    padding: 6rem 0 4rem;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-size: 1.125rem;
    font-weight: 600;
    transition: background 0.2s, transform 0.2s;
}

.cta-button:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

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

/* Features */
.features {
    padding: 4rem 0;
}

.features h2,
.how-it-works h2,
.suppliers h2,
.cta-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
}

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

.feature-card {
    padding: 2rem;
    background: var(--bg-alt);
    border-radius: 12px;
    border: 1px solid var(--border);
}

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

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

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

/* How It Works */
.how-it-works {
    padding: 4rem 0;
    background: var(--bg-alt);
    margin: 0 -2rem;
    padding-left: 2rem;
    padding-right: 2rem;
}

.steps {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

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

.step-content h3 {
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

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

/* Suppliers */
.suppliers {
    padding: 4rem 0;
    text-align: center;
}

.supplier-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.supplier-tag {
    padding: 0.75rem 1.5rem;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-weight: 500;
}

.supplier-tag.custom {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* CTA Section */
.cta-section {
    text-align: center;
    padding: 4rem 0 6rem;
}

.cta-section p {
    color: var(--text-muted);
    margin-bottom: 2rem;
    font-size: 1.125rem;
}

/* Footer */
footer {
    border-top: 1px solid var(--border);
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Mobile */
@media (max-width: 640px) {
    nav {
        padding: 1rem;
    }

    main {
        padding: 0 1rem;
    }

    .hero {
        padding: 4rem 0 3rem;
    }

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

    .how-it-works {
        margin: 0 -1rem;
        padding-left: 1rem;
        padding-right: 1rem;
    }
}