/* ============================================
   RESET & GENERAL STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Georgia', 'Times New Roman', serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* ============================================
   NAVIGATION BAR
   ============================================ */
nav {
    background-color: #1a1a2e;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

nav a {
    color: #fff;
    text-decoration: none;
    font-size: 1.1rem;
    transition: color 0.3s;
    font-family: 'Arial', sans-serif;
    padding: 0.5rem 1rem;
}

nav a:hover,
nav a.active {
    color: #6c9bcf;
}

/* ============================================
   CONTAINER & LAYOUT
   ============================================ */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 3rem 2rem;
    min-height: calc(100vh - 60px);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #1a1a2e;
}

h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: #1a1a2e;
    border-bottom: 3px solid #1a1a2e;
    padding-bottom: 0.5rem;
}

h3 {
    font-size: 1.4rem;
    margin-top: 1rem;
    margin-bottom: 1rem;
    color: #2c2c54;
}

h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: #1a1a2e;
}

p {
    margin-bottom: 1rem;
    text-align: justify;
}

/* ============================================
   HOME PAGE STYLES
   ============================================ */
.home-content {
    display: flex;
    align-items: center;
    gap: 3rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.portrait-container {
    flex-shrink: 0;
}

.portrait {
    width: 280px;
    height: 320px;
    object-fit: cover;
    border-radius: 5px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.home-text {
    flex: 1;
    min-width: 300px;
}

.subtitle {
    font-size: 1.3rem;
    color: #555;
    margin-bottom: 1.5rem;
    font-style: italic;
}

/* ============================================
   ABOUT PAGE STYLES
   ============================================ */
.about-section {
    display: flex;
    gap: 2rem;
    margin: 3rem 0;
    align-items: flex-start;
    flex-wrap: wrap;
}

.about-section.reverse {
    flex-direction: row-reverse;
}

.about-image {
    width: 300px;
    height: 250px;
    object-fit: cover;
    border-radius: 5px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
    flex-shrink: 0;
}

.about-text {
    flex: 1;
    min-width: 300px;
}

.about-text p {
    margin-bottom: 1rem;
}

/* ============================================
   PUBLICATIONS PAGE STYLES
   ============================================ */
.publication {
    background: white;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 5px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    border-left: 4px solid #1a1a2e;
}

.publication-meta {
    font-style: italic;
    color: #666;
    margin-bottom: 0.5rem;
}

/* ============================================
   CONTACT PAGE STYLES
   ============================================ */
.contact-info {
    background: white;
    padding: 2rem;
    border-radius: 5px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    margin-top: 2rem;
}

.contact-item {
    margin-bottom: 1.5rem;
}

.contact-item strong {
    display: block;
    margin-bottom: 0.3rem;
    color: #1a1a2e;
    font-size: 1.1rem;
}

.contact-item a {
    color: #2c5aa0;
    text-decoration: none;
}

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

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    .home-content {
        flex-direction: column;
        text-align: center;
    }

    .portrait {
        margin: 0 auto;
    }

    .about-section,
    .about-section.reverse {
        flex-direction: column;
    }

    .about-image {
        width: 100%;
        height: auto;
        max-height: 300px;
    }

    nav ul {
        gap: 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.7rem;
    }

    .container {
        padding: 2rem 1rem;
    }
}