:root {
    --background: oklch(1.0000 0 0);
    --foreground: oklch(0.3211 0 0);
    --primary: oklch(0.6231 0.1880 259.8145);
    --primary-foreground: oklch(1.0000 0 0);
    --muted-foreground: oklch(0.5510 0.0234 264.3637);
    --input: oklch(0.9276 0.0058 264.5313);
    --muted: oklch(0.9846 0.0017 247.8389);
    --font-sans: Inter, sans-serif;
    --font-serif: Source Serif 4, serif;
}

body {
    background-color: var(--background);
    color: var(--foreground);
    font-family: var(--font-sans);
    line-height: 1.6;
    padding: 4rem 1rem;
    max-width: 960px;
    margin: 0 auto;
}

h1,
h2 {
    font-family: var(--font-serif);
}

h1 {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

p {
    color: var(--muted-foreground);
    margin-bottom: 1rem;
}

a.button {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: 0.75rem;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    transition: background 0.2s;
}

.button-primary {
    background-color: var(--primary);
    color: var(--primary-foreground);
}

.button-outline {
    border: 1px solid var(--input);
    color: var(--foreground);
    background-color: transparent;
}

.button-outline:hover {
    background-color: var(--muted);
}

.card {
    border: 1px solid var(--input);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card a {
    color: var(--primary);
    text-decoration: underline;
}

.card small {
    display: block;
    color: var(--muted-foreground);
    margin-top: 0.5rem;
}

header {
    margin-bottom: 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--input);
    padding-bottom: 1rem;
}

nav a {
    margin-left: 1rem;
    font-weight: 500;
    color: var(--foreground);
    text-decoration: none;
}

nav a:hover {
    text-decoration: underline;
}

.button-wrapper {
    text-align: center;
    margin-top: 1.5rem;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .portfolio-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}