:root {
    --text: #1a1a1a;
    --text-secondary: #4a4a4a;
    --accent: #2563eb;
    --bg: #fafafa;
    --surface: #ffffff;
    --border: #e5e5e5;
}

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

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

.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

header {
    padding: 3rem 0 2rem;
    border-bottom: 1px solid var(--border);
}

header h1 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1rem;
}

main {
    padding: 2rem 0;
}

section {
    margin-bottom: 2.5rem;
}

h2 {
    font-size: 1.1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.project {
    margin-bottom: 1.75rem;
    padding: 1.25rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
}

.project h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.project .tech {
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.project p {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.project a {
    font-size: 0.9rem;
    color: var(--accent);
    text-decoration: none;
}

.project a:hover {
    text-decoration: underline;
}

.background ul {
    list-style: none;
    padding: 0;
}

.background li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border);
}

.background li:last-child {
    border-bottom: none;
}

.contact a {
    color: var(--accent);
    text-decoration: none;
}

.contact a:hover {
    text-decoration: underline;
}

footer {
    padding: 2rem 0;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

@media (max-width: 600px) {
    header {
        padding: 2rem 0 1.5rem;
    }

    header h1 {
        font-size: 1.5rem;
    }

    .project {
        padding: 1rem;
    }
}