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

body {
    font-family: 'Baskerville', 'Palatino Linotype', 'Book Antiqua', Palatino, Georgia, serif;
    line-height: 1.7;
    margin: 0;
    padding: 0;
    background-color: #fafafa;
    color: #2c2c2c;
}

/* ── Layout ── */
.container {
    width: 85%;
    max-width: 820px;
    margin: 0 auto;
    padding: 20px 0;
}

/* ── Header ── */
header {
    text-align: center;
    padding: 48px 0 16px;
}

header h1 {
    margin: 0;
    font-size: 2.4em;
    font-weight: normal;
    letter-spacing: 0.02em;
}

/* ── Navigation ── */
nav {
    text-align: center;
    margin: 12px 0 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid #ddd;
}

nav a {
    margin: 0 14px;
    color: #2c2c2c;
    text-decoration: none;
    font-size: 1.1em;
    padding-bottom: 2px;
    transition: color 0.2s, border-bottom-color 0.2s;
    border-bottom: 1.5px solid transparent;
}

nav a:hover,
nav a.active {
    color: #1a1a1a;
    border-bottom-color: #2c2c2c;
}

/* ── Home page content ── */
.content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin: 24px 0;
    gap: 24px;
}

.profile-pic {
    width: 100%;
    max-width: 340px;
    height: auto;
    border-radius: 4px;
}

.text-content {
    flex: 1;
    min-width: 240px;
}

.text-content p {
    margin: 0 0 14px;
}

.contact-info a {
    color: #2c2c2c;
    text-decoration: none;
    border-bottom: 1px solid #bbb;
    transition: border-bottom-color 0.2s;
}

.contact-info a:hover {
    border-bottom-color: #2c2c2c;
}

/* ── Research page ── */
.research-section {
    margin: 32px 0;
}

.research-section h2 {
    margin-bottom: 20px;
    font-size: 1.7em;
    font-weight: normal;
}

.paper-title {
    font-size: 1.35em;
    margin: 16px 0 4px;
    font-style: italic;
}

.paper-authors {
    margin-bottom: 8px;
}

.paper-authors a {
    color: #2c2c2c;
    text-decoration: none;
    border-bottom: 1px solid #bbb;
    transition: border-bottom-color 0.2s;
}

.paper-authors a:hover {
    border-bottom-color: #2c2c2c;
}

.paper-abstract {
    margin-top: 12px;
    color: #444;
    font-size: 0.95em;
    line-height: 1.75;
}

.paper-images {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 20px;
}

.paper-images img {
    width: 48%;
    height: auto;
}

/* ── Footer ── */
footer {
    text-align: center;
    padding: 24px 0;
    margin-top: 40px;
    border-top: 1px solid #ddd;
    color: #888;
    font-size: 0.9em;
}

/* ── Responsive ── */
@media only screen and (max-width: 600px) {
    .container {
        width: 90%;
    }

    .content {
        flex-direction: column;
        align-items: center;
    }

    .text-content {
        text-align: center;
        min-width: 0;
    }

    .paper-images {
        flex-direction: column;
        align-items: center;
    }

    .paper-images img {
        width: 100%;
        max-width: 400px;
    }

    nav a {
        margin: 0 10px;
    }
}