:root {
    --color-bg: #ffffff;
    --color-text: #1f2933;
    --color-muted: #6b7280;
    --color-primary: #1e40af;
    --color-accent: #2563eb;
    --color-border: #e5e7eb;
    --color-section: #f9fafb;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
        sans-serif;
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
}

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

a:hover {
    text-decoration: underline;
}

.container {
    max-width: 1100px;
    padding: 0 1.25rem;
    margin: 0 auto;
}

/* Header */

.site-header {
    border-bottom: 1px solid var(--color-border);
    background: #fff;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.branding {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.navigation a {
    margin-left: 1.25rem;
    font-size: 0.95rem;
    color: var(--color-muted);
}

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

/* Hero */

.hero {
    padding: 5rem 0 4rem;
}

.hero h1 {
    font-size: 2.75rem;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.1rem;
    color: var(--color-muted);
    max-width: 640px;
}

/* Sections */

.section {
    padding: 4rem 0;
}

.section-muted {
    background-color: var(--color-section);
}

.section h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

/* Grid & Cards */

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}

.card {
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 1.75rem;
    background: #fff;
}

.card h3 {
    margin-top: 0;
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.card p {
    margin: 0;
    color: var(--color-muted);
}

/* Contact */

.contact-email a {
    font-size: 1.1rem;
    font-weight: 500;
}

/* Footer */

.site-footer {
    border-top: 1px solid var(--color-border);
    padding: 2rem 0;
    text-align: center;
    font-size: 0.9rem;
    color: var(--color-muted);
}

/* Responsive tweaks */

@media (max-width: 640px) {
    .hero h1 {
        font-size: 2.2rem;
    }

    .navigation {
        display: none;
    }
}