/* Variables CSS */
:root {
    --primary-color: #09406b;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-gray: #ecf0f1;
    --dark-gray: #7f8c8d;
    --text-color: #333;
    --link-color: #3498db;
    --shadow: 0 2px 5px rgba(0,0,0,0.1);
}

/* Reset et base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';
    line-height: 1.6;
    color: var(--text-color);
    background-color: #fff;
}

/* Navigation */
header {
    background-color: var(--primary-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

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

.nav-menu a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: var(--secondary-color);
}

/* Sections */
.section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

.section h2 {
    color: var(--primary-color);
    border-bottom: 3px solid var(--secondary-color);
    padding-bottom: 0.5rem;
    margin-bottom: 2rem;
    font-size: 2rem;
}

/* Section À propos */
#profile-name {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 2rem;
    font-size: 2.5rem;
}

.about-content {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
    flex-wrap: wrap;
}

#profile-photo {
    width: 250px;
    height: 250px;
    object-fit: cover;
    border-radius: 50%;
    box-shadow: var(--shadow);
}

#profile-info {
    flex: 1;
    min-width: 300px;
}

#profile-info p {
    margin-bottom: 1rem;
}

/* Publications */
.filter-bar {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    align-items: center;
}

.filter-bar select {
    padding: 0.5rem;
    border: 1px solid var(--dark-gray);
    border-radius: 4px;
    font-size: 1rem;
}

.publication {
    background: var(--light-gray);
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: transform 0.2s;
}

.publication:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.publication-title {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.publication-authors {
    color: var(--dark-gray);
    margin-bottom: 0.5rem;
}

.publication-venue {
    font-style: italic;
    margin-bottom: 0.5rem;
}

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

.publication-links a {
    color: var(--link-color);
    text-decoration: none;
    padding: 0.3rem 0.8rem;
    border: 1px solid var(--link-color);
    border-radius: 4px;
    transition: all 0.3s;
    font-size: 0.9rem;
}

.publication-links a:hover {
    background-color: var(--link-color);
    color: white;
}

/* Teaching */
/* Teaching Section */
.teaching-year {
    background: white;
    border-left: 4px solid var(--secondary-color);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

.year-header {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--light-gray);
}

.course-list {
    list-style-type: none;
    padding-left: 0;
}

.course-list li {
    padding: 0.4rem 0;
    color: var(--text-color);
}

.course-list li strong {
    color: var(--secondary-color);
}

.course-list li em {
    color: var(--dark-gray);
    font-size: 0.9rem;
}

/* Legacy course styles (kept for compatibility) */
.course {
    background: white;
    border-left: 4px solid var(--secondary-color);
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
}

.course-title {
    font-weight: 600;
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.course-info {
    color: var(--dark-gray);
    margin-bottom: 0.5rem;
}

/* Students */
.students-container {
    display: grid;
    gap: 2rem;
}

.student-category h3 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.student {
    background: var(--light-gray);
    padding: 1rem;
    margin-bottom: 0.8rem;
    border-radius: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.student-name {
    font-weight: 600;
    color: var(--primary-color);
}

.student-topic {
    color: var(--dark-gray);
    flex: 1;
    margin: 0 1rem;
}

.student-year {
    color: var(--dark-gray);
    font-size: 0.9rem;
}

/* Projects */
.project {
    background: white;
    border: 1px solid var(--light-gray);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.project-title {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.project-status {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.project-status.active {
    background-color: #2ecc71;
    color: white;
}

.project-status.completed {
    background-color: var(--dark-gray);
    color: white;
}

.project-description {
    margin-bottom: 1rem;
}

.project-links a {
    color: var(--link-color);
    text-decoration: none;
    margin-right: 1rem;
}

/* Contact */
#contact-info {
    background: var(--light-gray);
    padding: 2rem;
    border-radius: 8px;
}

#contact-info p {
    margin-bottom: 1rem;
}

#contact-info a {
    color: var(--link-color);
    text-decoration: none;
}

/* Collapsible sections */
.collapsible-content {
    overflow: hidden;
    transition: max-height 0.5s ease-out, opacity 0.3s ease-out;
    max-height: 20000px;
    opacity: 1;
}

.collapsible-content.hidden {
    max-height: 0;
    opacity: 0;
    margin: 0;
    padding: 0;
}

.toggle-btn {
    background: none;
    border: 2px solid var(--secondary-color);
    color: var(--secondary-color);
    padding: 0.4rem 1rem;
    margin-left: 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.toggle-btn:hover {
    background-color: var(--secondary-color);
    color: white;
}

.toggle-btn .arrow {
    transition: transform 0.3s;
    display: inline-block;
}

.toggle-btn.expanded .arrow {
    transform: rotate(180deg);
}

.subsection-header {
    color: var(--secondary-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
}

/* Conferences */
.conference-category {
    margin-bottom: 2rem;
}

.conference-category h4 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--light-gray);
    padding-bottom: 0.5rem;
}

.conference-list {
    list-style: none;
    padding: 0;
}

.conference-item {
    background: var(--light-gray);
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    border-radius: 6px;
    box-shadow: var(--shadow);
    line-height: 1.6;
}

.conference-year-group {
    padding: 0.5rem 0;
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.conference-name {
    font-weight: 600;
    color: var(--primary-color);
}

.conference-period {
    color: var(--dark-gray);
    font-style: italic;
}

.conference-year {
    color: var(--secondary-color);
    font-weight: 600;
}

.conference-role {
    color: var(--secondary-color);
    font-size: 0.95rem;
}

/* Conferences */
.conference-category {
    margin-bottom: 2rem;
}

.conference-category h4 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--light-gray);
    padding-bottom: 0.5rem;
}

.conference-list {
    list-style: none;
    padding: 0;
}

.conference-item {
    background: var(--light-gray);
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    border-radius: 6px;
    box-shadow: var(--shadow);
    line-height: 1.6;
}

.conference-year-group {
    padding: 0.5rem 0;
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.conference-name {
    font-weight: 600;
    color: var(--primary-color);
}

.conference-period {
    color: var(--dark-gray);
    font-style: italic;
}

.conference-year {
    color: var(--secondary-color);
    font-weight: 600;
}

.conference-role {
    color: var(--secondary-color);
    font-size: 0.95rem;
}

/* Committees */
.committee-year {
    margin-bottom: 2rem;
}

.committee-list {
    list-style: none;
    padding: 0;
}

.committee-item {
    background: var(--light-gray);
    padding: 1rem;
    margin-bottom: 0.75rem;
    border-radius: 6px;
    box-shadow: var(--shadow);
    line-height: 1.6;
}

.committee-role {
    color: var(--primary-color);
    font-weight: 600;
}

.committee-type {
    color: var(--secondary-color);
    font-weight: 500;
    font-style: italic;
}

.committee-note {
    color: #d97706;
    font-size: 0.9rem;
    font-weight: 500;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 2rem;
    margin-top: 3rem;
}

/* Responsive */
@media (max-width: 768px) {
    .about-content {
        flex-direction: column;
        align-items: center;
    }

    #profile-photo {
        width: 200px;
        height: 200px;
    }

    .section {
        padding: 2rem 1rem;
    }

    .nav-menu {
        gap: 1rem;
        padding: 0 1rem;
    }

    .student {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}