/* ==========================================================================
   Pierre Jourlin - Site Web Professionnel
   ========================================================================== */

/* Variables CSS */
:root {
    --primary-color: #1a365d;
    --secondary-color: #2c5282;
    --accent-color: #3182ce;
    --text-color: #2d3748;
    --light-bg: #f7fafc;
    --white: #ffffff;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.7;
    color: var(--text-color);
    background-color: var(--light-bg);
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--primary-color);
}

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

h2 {
    font-size: 1.875rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid var(--accent-color);
}

h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

/* Header et Navigation */
header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-lg);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
}

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

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    color: var(--white);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

nav a:hover, nav a.active {
    background-color: rgba(255, 255, 255, 0.2);
    text-decoration: none;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 4rem 2rem;
    text-align: center;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.hero h1 {
    color: var(--white);
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero .subtitle {
    font-size: 1.5rem;
    opacity: 0.95;
    margin-bottom: 1.5rem;
}

.hero .tagline {
    font-size: 1.125rem;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto;
}

/* Container principal */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

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

/* Cards */
.card {
    background: var(--white);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.card h3 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.card .date {
    color: #718096;
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
}

.card .institution {
    color: var(--accent-color);
    font-weight: 500;
    margin-bottom: 0.75rem;
}

/* Grilles */
.grid {
    display: grid;
    gap: 2rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

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

.skill-category {
    background: var(--white);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.skill-category h3 {
    color: var(--secondary-color);
    font-size: 1.1rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-color);
}

.skill-list {
    list-style: none;
}

.skill-list li {
    padding: 0.4rem 0;
    padding-left: 1.25rem;
    position: relative;
}

.skill-list li::before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--accent-color);
}

/* Publications */
.publication {
    background: var(--white);
    border-left: 4px solid var(--accent-color);
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: 0 8px 8px 0;
    box-shadow: var(--shadow);
}

.publication h4 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.publication .authors {
    color: #4a5568;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.publication .venue {
    color: #718096;
    font-size: 0.875rem;
    font-style: italic;
}

.publication .year {
    display: inline-block;
    background: var(--accent-color);
    color: var(--white);
    padding: 0.125rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    margin-right: 0.5rem;
}

.publication .type {
    display: inline-block;
    background: var(--light-bg);
    color: var(--secondary-color);
    padding: 0.125rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
    padding-left: 1.5rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2.45rem;
    top: 0.5rem;
    width: 12px;
    height: 12px;
    background: var(--white);
    border: 3px solid var(--accent-color);
    border-radius: 50%;
}

/* Stats */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
    text-align: center;
    margin: 2rem 0;
}

.stat-item {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-color);
}

.stat-label {
    color: #718096;
    font-size: 0.875rem;
}

/* Boutons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--primary-color);
    color: var(--white);
    text-decoration: none;
}

.btn-outline {
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
    background: transparent;
}

.btn-outline:hover {
    background: var(--accent-color);
    color: var(--white);
    text-decoration: none;
}

/* Contact Section */
.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.contact-icon {
    font-size: 1.5rem;
    color: var(--accent-color);
}

.contact-details h4 {
    margin-bottom: 0.25rem;
    color: var(--secondary-color);
}

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

footer a {
    color: var(--white);
    opacity: 0.8;
}

footer a:hover {
    opacity: 1;
}

/* Profil avec photo */
.profile-section {
    display: flex;
    gap: 3rem;
    align-items: flex-start;
    flex-wrap: wrap;
}

.profile-photo {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: var(--shadow-lg);
    border: 4px solid var(--white);
}

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

/* Quick links sur la page d'accueil */
.quick-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.quick-link {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.quick-link:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
}

.quick-link h3 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.quick-link p {
    color: #718096;
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* Responsive */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 1rem;
    }

    nav ul {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero .subtitle {
        font-size: 1.25rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .profile-section {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

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

/* Highlights/Points clés */
.highlights {
    background: linear-gradient(135deg, var(--light-bg) 0%, var(--white) 100%);
    padding: 2rem;
    border-radius: 8px;
    margin: 2rem 0;
}

.highlights ul {
    list-style: none;
}

.highlights li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
}

.highlights li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

/* Livre mise en valeur */
.book-highlight {
    background: linear-gradient(135deg, #f6f9fc 0%, #edf2f7 100%);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    display: flex;
    gap: 2rem;
    align-items: center;
    margin: 2rem 0;
}

.book-cover {
    width: 150px;
    height: auto;
    box-shadow: var(--shadow-lg);
    border-radius: 4px;
}

.book-info h3 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.book-info .publisher {
    color: #718096;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

@media (max-width: 600px) {
    .book-highlight {
        flex-direction: column;
        text-align: center;
    }
}

/* Print styles */
@media print {
    header, footer, nav {
        display: none;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
    }
    
    .card, .publication {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}