:root {
    --bg: #ffffff;
    --text: #0f172a;
    --text-muted: #64748b;
    --accent: #0f172a;
    --accent-text: #ffffff;
    --border: #e2e8f0;
    --card-bg: #ffffff;
    --nav-bg: rgba(255, 255, 255, 0.8);
    --badge-bg: #f1f5f9;
    --badge-text: #475569;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

[data-theme="dark"] {
    --bg: #0f172a;
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #f8fafc;
    --accent-text: #0f172a;
    --border: #1e293b;
    --card-bg: #1e293b;
    --nav-bg: rgba(15, 23, 42, 0.8);
    --badge-bg: #1e293b;
    --badge-text: #94a3b8;
    --shadow: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--nav-bg);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    padding: 1rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 700;
    text-decoration: none;
    color: var(--text);
    font-size: 1.25rem;
    letter-spacing: -0.025em;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.875rem;
    transition: color 0.2s;
}

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

.nav-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.icon-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text);
    padding: 0.5rem;
    border-radius: 50%;
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background-color: var(--badge-bg);
}

.mobile-only {
    display: none;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--badge-bg);
    color: var(--badge-text);
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.5rem;
}

h1 {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.05em;
}

.lead {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 3rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 9999px;
    font-weight: 600;
    text-decoration: none;
    transition: opacity 0.2s;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--accent-text);
}

.btn-primary:hover {
    opacity: 0.9;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-btn {
    color: var(--text);
    padding: 0.5rem;
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

.social-btn:hover {
    background-color: var(--badge-bg);
}

.hero-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.meta-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-muted);
    display: block;
    margin-bottom: 0.5rem;
}

.meta-item p {
    font-weight: 500;
}

.hero-image {
    position: relative;
    max-width: 400px;
    margin-left: auto;
}

.image-bg {
    position: absolute;
    inset: 0;
    background-color: var(--badge-bg);
    border-radius: 1.5rem;
    transform: rotate(3deg);
}

.hero-image img {
    position: relative;
    width: 100%;
    height: auto;
    border-radius: 1.5rem;
    transform: rotate(-3deg);
    border: 4px solid var(--bg);
    box-shadow: var(--shadow);
}

/* Sections */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.header-icon {
    display: inline-flex;
    padding: 1rem;
    background-color: var(--badge-bg);
    border-radius: 1rem;
    margin-bottom: 1rem;
    color: var(--text-muted);
}

h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.025em;
}

.section-header p {
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Filters */
.filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.search-box, .filter-box {
    position: relative;
    flex: 1;
}

.search-box i, .filter-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    width: 18px;
    height: 18px;
}

input, select {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 3rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border);
    background-color: var(--card-bg);
    color: var(--text);
    outline: none;
    font-family: inherit;
    transition: border-color 0.2s;
}

input:focus, select:focus {
    border-color: var(--text-muted);
}

/* Lists and Cards */
.list-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.publication-card {
    display: flex;
    gap: 2rem;
}

.pub-year {
    font-size: 0.75rem;
    font-weight: 700;
    /*color: var(--border);*/
    min-width: 70px;
    background-color: var(--badge-bg);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;

}

.pub-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.pub-authors {
    color: var(--text-muted);
    font-style: italic;
    margin-bottom: 1rem;
}

.pub-meta {
    display: flex;
    gap: 1rem;
    align-items: center;
    font-size: 0.875rem;
}

.pub-journal {
    background-color: var(--badge-bg);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
}

.pub-link {
    color: #3b82f6;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.pub-link:hover {
    text-decoration: underline;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.course-card .card-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.course-year {
    background-color: #dbeafe;
    color: #1e40af;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 1rem;
    font-weight: 700;
}

[data-theme="dark"] .course-year {
    background-color: #1e3a8a;
    color: #93c5fd;
}

.course-card h3 {
    margin-bottom: 0.5rem;
}

.course-program {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.course-desc {
    font-size: 0.8rem;
    margin-bottom: 0.5rem;    
}

.course-date {
    /*color: var(--text-muted);*/
    font-size: 0.75rem;
    font-weight: 700;
}

.thesis-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.thesis-year {
    color: var(--text-muted);
    font-weight: 700;
    min-width: 50px;
}

.thesis-info {
    flex: 1;
}

.thesis-type {
    padding: 0.25rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

/* Contact Grid */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.contact-card {
    text-align: center;
    padding: 2rem;
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 1rem;
}

.card-icon {
    width: 3rem;
    height: 3rem;
    background-color: var(--badge-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: var(--text-muted);
}

/* Footer */
.footer {
    padding: 3rem 0;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Loading */
.loading {
    text-align: center;
    padding: 4rem;
    color: var(--text-muted);
}

/* Mobile Menu */
.nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--bg);
    padding: 2rem;
    border-bottom: 1px solid var(--border);
    gap: 1.5rem;
}

/* Responsive */
@media (max-width: 1024px) {
    h1 { font-size: 3rem; }
}

@media (max-width: 768px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: 100px;
    }
    
    .hero-content { order: 2; }
    .hero-image { order: 1; margin: 0 auto 2rem; }
    
    .lead { margin: 0 auto 2rem; }
    .hero-actions { justify-content: center; flex-direction: column; gap: 1rem; }
    
    .nav-links { display: none; }
    .mobile-only { display: flex; }
    
    .contact-grid { grid-template-columns: 1fr; }
    
    .publication-card { flex-direction: column; gap: 1rem; }
    .pub-year { font-size: 1.25rem; }
}

.contact-container {
    display: flex; /* Arranges children (form and map) side-by-side */
    flex-wrap: wrap; /* Allows items to wrap on smaller screens */
}

.contact-map {
    flex: 1; /* Allows the map container to grow and shrink with the screen size */
    min-width: 300px; /* Minimum width before wrapping to the next line */
    height: 450px;
}

/* Elegant Table */
.table-responsive {
    overflow-x: auto;
    background-color: var(--card-bg);
    border-radius: 1rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.elegant-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.875rem;
}

.elegant-table th {
    background-color: var(--badge-bg);
    padding: 1rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border);
}

.elegant-table td {
    padding: 1.25rem 1rem;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

.elegant-table tr:last-child td {
    border-bottom: none;
}

.elegant-table tr:hover {
    background-color: var(--badge-bg);
}

.cell-title {
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.25rem;
}

.cell-desc {
    color: var(--text-muted);
    font-size: 0.75rem;
    max-width: 300px;
}
.badge-mini {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    background-color: var(--badge-bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 500;
}

.icon-btn-small {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 6px;
    border: 1px solid var(--border);
    color: var(--text-muted);
    transition: all 0.2s;
}

.icon-btn-small:hover {
    background-color: var(--accent);
    color: var(--accent-text);
    border-color: var(--accent);
}