:root {
    --color-bg: #ffffff;
    --color-text: #4a4a4a;
    --color-heading: #363636;
    --color-muted: #6a6a6a;
    --color-link: #485fc7;
    --color-link-hover: #363636;
    --color-border: #ededed;
    --color-nav-hover: #f5f5f5;
    --container-width: 960px;
}

*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-bg);
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

nav {
    padding: 0.75rem 0;
}

.nav-inner {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-heading);
    text-decoration: none;
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 600;
}

.avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    object-fit: cover;
}

.nav-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 0.25rem;
}

.nav-links a {
    color: var(--color-text);
    text-decoration: none;
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
}

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

.section {
    padding: 3rem 1.5rem;
}

h1, h2, h3 {
    color: var(--color-heading);
    font-weight: 600;
    line-height: 1.2;
    margin: 0 0 1rem;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; margin-top: 2rem; }
h3 { font-size: 1.375rem; margin-top: 1.5rem; }

.subtitle {
    color: var(--color-muted);
    font-size: 1.05rem;
    margin: -0.5rem 0 1rem;
}

p { margin: 0 0 1rem; }

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

a:hover { text-decoration: underline; }

ul {
    margin: 0 0 1rem 1.25rem;
    padding: 0;
}

li { margin-bottom: 0.25rem; }

.project { margin-bottom: 2.5rem; }

.footer {
    background-color: #fafafa;
    border-top: 1px solid var(--color-border);
    padding: 2.5rem 1.5rem;
    text-align: center;
}

.footer p { margin: 0; }

@media (max-width: 640px) {
    h1 { font-size: 1.875rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }

    .nav-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .nav-links { padding-left: 0; }
    .section { padding: 2rem 1.5rem; }
}