:root {
    --primary-color: #0d6efd; /* Bleu Bootstrap standard */
    --secondary-color: #2c3e50; /* Bleu nuit élégant */
    --accent-color: #0dcaf0;
    --light-bg: #f8f9fa;
    --text-color: #333;
}

body {
    font-family: 'Poppins', sans-serif;
    color: var(--text-color);
    overflow-x: hidden;
}

/* --- Navigation --- */
.navbar {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--secondary-color) !important;
}

.nav-link {
    font-weight: 500;
    margin-left: 1rem;
    color: var(--secondary-color) !important;
    transition: color 0.3s;
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

/* --- Hero Section (Bannière) --- */
.hero-section {
    /* Image de fond sombre avec dégradé */
    background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1519389950473-47ba0277781c?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    background-position: center;
    height: 90vh; /* 90% de la hauteur de l'écran */
    display: flex;
    align-items: center;
    color: white;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    font-weight: 300;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* --- Boutons Personnalisés --- */
.btn-custom {
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.btn-primary-custom {
    background-color: var(--primary-color);
    border: none;
    color: white;
}

.btn-primary-custom:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(13, 110, 253, 0.4);
    color: white;
    background-color: #0b5ed7;
}

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

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-weight: 700;
    color: var(--secondary-color);
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
}

.section-title h2::after {
    content: '';
    position: absolute;
    width: 50px;
    height: 3px;
    background-color: var(--primary-color);
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

/* --- Cartes Services --- */
.service-card {
    background: white;
    padding: 40px 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    height: 100%;
    text-align: center;
    border: 1px solid rgba(0,0,0,0.02);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
    border-bottom: 4px solid var(--primary-color);
}

.icon-box {
    width: 80px;
    height: 80px;
    background-color: rgba(13, 110, 253, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: var(--primary-color);
    font-size: 2rem;
    transition: all 0.3s;
}

.service-card:hover .icon-box {
    background-color: var(--primary-color);
    color: white;
}

/* --- Contact --- */
.contact-info-item {
    display: flex;
    align-items: center;
    margin-bottom: 30px;
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.03);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 20px;
    font-size: 1.2rem;
}

.form-control {
    padding: 15px;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
    margin-bottom: 20px;
}

.form-control:focus {
    box-shadow: none;
    border-color: var(--primary-color);
}

/* --- Footer --- */
footer {
    background-color: var(--secondary-color);
    color: white;
    padding: 50px 0 20px;
}

.footer-link {
    color: #aaa;
    text-decoration: none;
    transition: 0.3s;
    display: block;
    margin-bottom: 10px;
}

.footer-link:hover {
    color: white;
    padding-left: 5px;
}

/* --- Responsive (Mobile) --- */
@media (max-width: 768px) {
    .hero-title { font-size: 2.5rem; }
    .hero-section { height: auto; padding: 100px 0; }
}