/* Global styles */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --text-color: #333;
    --light-gray: #f5f5f5;
    --border-color: #ddd;
    --heading-font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --body-font: 'Open Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
    font-family: var(--body-font);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-gray);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--heading-font);
    font-weight: 600;
    letter-spacing: -0.02em;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    background-color: white;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

/* Header styles */
header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}

h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.contact-links a {
    color: var(--secondary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s;
}

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

/* Section styles */
section {
    margin-bottom: 3rem;
}

h2 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.entry {
    margin-bottom: 2rem;
}

.entry-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.5rem;
}

.entry-header h3 {
    color: var(--primary-color);
    font-size: 1.3rem;
    font-weight: 600;
}

.entry-subheader {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.location, .date {
    color: #555;
    font-size: 0.95rem;
    font-weight: 400;
}

ul {
    list-style-position: inside;
    margin-left: 1rem;
}

li {
    margin-bottom: 0.5rem;
}

/* Publications styles */
.publication {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background-color: var(--light-gray);
    border-radius: 5px;
}

.highlight {
    color: #e74c3c;
}

.highlight-text {
    margin-top: 0.5rem;
    color: var(--secondary-color);
}

/* Skills styles */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.skill-category {
    background-color: var(--light-gray);
    padding: 1.5rem;
    border-radius: 8px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    background-color: white;
}

.skill-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.skill-header i {
    font-size: 1.5rem;
}

.skill-header h3 {
    font-family: var(--heading-font);
    font-weight: 500;
    color: var(--primary-color);
    font-size: 1.2rem;
    margin: 0;
    letter-spacing: -0.01em;
}

.skill-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.skill-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
    color: var(--text-color);
    font-size: 1rem;
    line-height: 1.5;
    font-weight: 400;
}

.skill-list i {
    color: var(--secondary-color);
    width: 1.25rem;
    text-align: center;
    font-size: 1.1rem;
}

/* References styles */
.reference-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.reference {
    background-color: var(--light-gray);
    padding: 1.5rem;
    border-radius: 5px;
}

.reference h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.reference .title {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-style: italic;
}

.reference a {
    color: var(--secondary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.reference a:hover {
    color: var(--primary-color);
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    .contact-links {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .entry-header {
        flex-direction: column;
    }

    .entry-subheader {
        flex-direction: column;
    }

    .skills-grid, .reference-grid {
        grid-template-columns: 1fr;
    }

    .skills-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .skill-category {
        padding: 1.25rem;
    }
}

/* Print styles */
@media print {
    body {
        background-color: white;
    }

    .container {
        box-shadow: none;
        max-width: none;
        padding: 0;
    }

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

    .publication, .skill-category, .reference {
        background-color: white;
        break-inside: avoid;
    }
}