body {
    font-family: 'Segoe UI', sans-serif;
    background-color: #f8f9fa;
}

.presentation {
    background: linear-gradient(120deg, #0d6efd, #0056d2);
    padding: 80px 0;
}
/* NAVBAR STYLES */

.navbar {
    padding: 0.8rem 1rem;
    font-size: 1rem;
    background-color: #1c1c1c !important;
}

.navbar-brand {
    font-size: 1.5rem;
    letter-spacing: 1px;
    color: #fff;
}

.nav-custom {
    color: #ddd !important;
    margin: 0 10px;
    padding: 8px 15px;
    border-radius: 30px;
    transition: all 0.3s ease;
}

.nav-custom:hover,
.nav-custom.active {
    background-color: #0d6efd;
    color: white !important;
    transform: scale(1.05);
}

.navbar-toggler {
    border-color: #fff;
}

/* FOOTER PROPRE ET ÉLÉGANT */
.footer-pro {
    background-color: #1c1c1e;
    color: #ccc;
    font-size: 0.95rem;
    border-top: 2px solid #0d6efd;
}

.social-icons .social-link {
    display: inline-block;
    margin: 0 10px;
    font-size: 1.3rem;
    color: #ccc;
    transition: transform 0.3s ease, color 0.3s ease;
}

.social-icons .social-link:hover {
    color: #0d6efd;
    transform: translateY(-3px);
}

.footer-mention {
    color: #aaa;
    font-size: 0.85rem;
    text-decoration: underline;
    transition: color 0.3s ease;
}

.footer-mention:hover {
    color: #fff;
}

.section-title {
    font-size: 2rem;
    color: #0d6efd;
    position: relative;
    font-weight: bold;
}

.section-title::after {
    content: '';
    width: 60px;
    height: 4px;
    background-color: #0d6efd;
    display: block;
    margin: 10px auto;
    border-radius: 2px;
}

.timeline-vertical {
    border-left: 3px solid #dee2e6;
    margin-left: 15px;
    position: relative;
}

.timeline-block {
    position: relative;
    margin-left: 20px;
    margin-bottom: 40px;
}

.timeline-icon {
    width: 40px;
    height: 40px;
    position: absolute;
    left: -38px;
    top: 0;
    border-radius: 50%;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
}

.timeline-content {
    padding: 10px 15px;
    background: #fff;
    border-left: 4px solid #0d6efd;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.timeline-content h5 {
    font-weight: bold;
    margin-bottom: 5px;
    color: #0d6efd;
}