:root {
    --color-accent: #6491b2;
    --color-accent-hover: #4f738d;
    --color-text: #333;
    --color-heading: #222;
    --color-bg: #fff;
    --font-family: 'Lato', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

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

body {
    font-family: var(--font-family);
    font-size: 17px;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

main {
    max-width: 650px;
    margin: 0 auto;
    padding: 80px 24px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 60px;
}

.avatar {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 24px;
}

h1 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.title {
    font-size: 1.1rem;
    color: var(--color-text);
    margin-bottom: 4px;
}

.contact {
    font-size: 1rem;
    margin-bottom: 20px;
}

.links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 16px;
}

.links a {
    color: var(--color-accent);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

.links a:hover {
    color: var(--color-accent-hover);
}

/* Sections */
section {
    margin-bottom: 48px;
}

h2 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--color-heading);
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

p {
    margin-bottom: 16px;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-accent-hover);
}

/* Publications list */
.publications {
    list-style: none;
    margin: 16px 0 24px 0;
}

.publications li {
    margin-bottom: 8px;
}

.publications a {
    font-weight: 500;
}

/* Responsive */
@media (max-width: 600px) {
    main {
        padding: 48px 20px;
    }

    .avatar {
        width: 130px;
        height: 130px;
    }

    h1 {
        font-size: 1.8rem;
    }

    .links {
        gap: 16px;
    }
}