/* Page À propos - Styles */
:root {
    --blue: #003DA5;
    --blue-dark: #002B75;
    --blue-pale: #E8F0FE;
    --success: #0D7A3E;
    --success-light: #E6F4EC;
    --gray-50: #F8FAFC;
    --gray-100: #F1F5F9;
    --gray-200: #E2E8F0;
    --gray-400: #94A3B8;
    --gray-500: #64748B;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1E293B;
    --font-display: 'Playfair Display', serif;
    --font-body: 'Source Sans 3', sans-serif;
}

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

body {
    font-family: var(--font-body);
    background: linear-gradient(135deg, var(--blue-pale) 0%, white 100%);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
}

/* Header */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: white;
    padding: 1rem 2rem;
    border-radius: 0.75rem;
    box-shadow: 0 4px 12px rgba(0,61,165,0.08);
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray-600);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}
.back-btn:hover { color: var(--blue); }

.header-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--blue);
}

.fleur-icon { width: 36px; height: 36px; }

/* Sections */
section {
    background: white;
    border-radius: 0.75rem;
    box-shadow: 0 4px 12px rgba(0,61,165,0.08);
    padding: 2rem;
    margin-bottom: 1.5rem;
}

section h2 {
    font-family: var(--font-display);
    font-size: 1.4rem;
    color: var(--blue);
    margin-bottom: 1.25rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--blue-pale);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

section h2 i {
    font-size: 1.1rem;
}

/* Intro */
.intro {
    text-align: center;
    padding: 3rem 2rem;
}

.intro-icon {
    margin-bottom: 1.5rem;
}

.fleur-large {
    width: 80px;
    height: 80px;
    color: var(--blue);
}

.intro h1 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    color: var(--blue);
    margin-bottom: 0.5rem;
}

.intro .tagline {
    font-size: 1.2rem;
    color: var(--gray-600);
}

/* Origin story */
.story-content p {
    font-size: 1.05rem;
    color: var(--gray-700);
    margin-bottom: 1rem;
    text-align: justify;
}

.story-content p:last-child {
    margin-bottom: 0;
}

.story-content strong {
    color: var(--blue);
}

/* Academic */
.academic-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

@media (max-width: 900px) {
    .academic-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 500px) {
    .academic-grid { grid-template-columns: 1fr; }
}

.academic-card {
    background: var(--gray-50);
    border-radius: 0.5rem;
    padding: 1.5rem;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.academic-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,61,165,0.1);
}

.academic-icon {
    width: 50px;
    height: 50px;
    background: var(--blue-pale);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.academic-icon i {
    font-size: 1.25rem;
    color: var(--blue);
}

.academic-card h3 {
    font-size: 1rem;
    color: var(--gray-800);
    margin-bottom: 0.25rem;
}

.academic-card p {
    font-size: 0.85rem;
    color: var(--gray-600);
}

/* Features */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

@media (max-width: 700px) {
    .features-grid { grid-template-columns: 1fr; }
}

.feature-item {
    display: flex;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--gray-50);
    border-radius: 0.5rem;
    transition: transform 0.2s;
}

.feature-item:hover {
    transform: translateX(5px);
}

.feature-item > i {
    font-size: 1.5rem;
    color: var(--blue);
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.feature-item h3 {
    font-size: 1rem;
    color: var(--gray-800);
    margin-bottom: 0.25rem;
}

.feature-item p {
    font-size: 0.9rem;
    color: var(--gray-600);
}

/* Author */
.author-card {
    display: flex;
    gap: 2rem;
    align-items: center;
    padding: 2rem;
    background: linear-gradient(135deg, var(--blue-pale) 0%, var(--gray-50) 100%);
    border-radius: 0.75rem;
}

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

.author-avatar {
    width: 100px;
    height: 100px;
    background: var(--blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.author-avatar i {
    font-size: 2.5rem;
    color: white;
}

.author-info h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--gray-800);
    margin-bottom: 0.25rem;
}

.author-title {
    font-size: 1rem;
    color: var(--blue);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.author-bio {
    font-size: 0.95rem;
    color: var(--gray-600);
}

/* Thanks */
.thanks p {
    font-size: 1rem;
    color: var(--gray-700);
    margin-bottom: 1rem;
}

.thanks p:last-child {
    margin-bottom: 0;
}

.thanks strong {
    color: var(--blue);
}

/* Links */
.links-grid {
    display: flex;
    gap: 0.75rem;
    flex-wrap: nowrap;
}

.link-card {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1rem;
    background: var(--blue);
    color: white;
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 500;
    font-size: 0.9rem;
    transition: background 0.2s, transform 0.2s;
}

.link-card:hover {
    background: var(--blue-dark);
    transform: translateY(-2px);
}

.link-card i {
    font-size: 1rem;
}

/* Footer */
.footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--gray-500);
    font-size: 0.85rem;
}

.footer strong {
    color: var(--blue);
}

.footer .version {
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--gray-400);
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .header {
        padding: 0.75rem 1rem;
    }
    
    .header-title {
        font-size: 1.1rem;
    }
    
    .fleur-icon {
        width: 28px;
        height: 28px;
    }
    
    section {
        padding: 1.5rem;
    }
    
    section h2 {
        font-size: 1.2rem;
    }
    
    .intro {
        padding: 2rem 1rem;
    }
    
    .intro h1 {
        font-size: 2rem;
    }
    
    .fleur-large {
        width: 60px;
        height: 60px;
    }
}

/* Bouton retour en haut */
.btn-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--blue);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    box-shadow: 0 4px 12px rgba(0,61,165,0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 1000;
}

.btn-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.btn-top:hover {
    background: var(--blue-dark);
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0,61,165,0.4);
}

@media (max-width: 768px) {
    .btn-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
        font-size: 1rem;
    }
}