:root {
    --color-primary: #005A9C; /* Bleu Profond */
    --color-primary-darker: #004B87;
    --color-accent: #FFC107;  /* Ambre/Or */
    --color-accent-darker: #E0A800;

    --text-main: #333333;       /* Gris Foncé */
    --text-secondary: #555555;  /* Gris Moyen */
    --text-light: #FFFFFF;      /* Blanc */

    --bg-main: #FFFFFF;         /* Blanc - Fond principal */
    --bg-secondary: #F0F0F0;    /* Gris Très Clair - Fond alternatif sections */
    --bg-dark: #2A3B4D;         /* Bleu-Gris Foncé - Footer */

    --font-primary: 'Montserrat', sans-serif;
    --font-secondary: 'Open Sans', sans-serif;
}

/* Global Styles */
body {
    font-family: var(--font-secondary);
    line-height: 1.6;
    color: var(--text-secondary);
    background-color: var(--bg-main);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 700;
    color: var(--text-main);
}

.section-title {
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 3rem;
}

.btn {
    transition: all 0.3s ease;
    border-radius: 50px;
    padding: 12px 30px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.btn-primary-custom {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--text-main); /* Texte foncé sur fond ambre pour contraste */
}

.btn-primary-custom:hover {
    background-color: var(--color-accent-darker);
    border-color: var(--color-accent-darker);
    color: var(--text-main);
}

.btn-secondary-custom {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--text-light);
}

.btn-secondary-custom:hover {
    background-color: var(--color-primary-darker);
    border-color: var(--color-primary-darker);
    color: var(--text-light);
}

.bg-light-custom {
    background-color: var(--bg-secondary) !important;
}

/* Header */
.header {
    background-color: var(--bg-main);
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
}

.header .navbar {
    padding: 0.2rem 0; /* Padding vertical réduit */
}

.header .navbar-brand img {
    max-height: 70px; /* Hauteur ajustée */
    width: auto; /* Permet à la largeur de s'ajuster proportionnellement */
    margin-right: 10px;
}

.header .navbar-brand .brand-name {
    font-family: var(--font-primary);
    font-weight: 900;
    font-size: 1.8rem;
    color: var(--color-primary);
}

.header .nav-link {
    font-family: var(--font-primary);
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0 10px;
    padding: 10px 0;
    position: relative;
    transition: color 0.3s ease;
}

.header .nav-link:hover, 
.header .nav-link.active {
    color: var(--color-accent);
}

.header .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background-color: var(--color-accent);
    transition: width 0.3s ease;
}

.header .nav-link:hover::after,
.header .nav-link.active::after {
    width: 100%;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.7)), url('../../uploads/road.jpg') no-repeat center center/cover;
    min-height: 100vh;
    color: var(--text-light);
}

.hero-title {
    font-size: 5rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    color: #fff; /* Couleur blanche pour le titre */
    text-shadow: 1px 1px 3px rgba(0,0,0,0.5); /* Ombre légèrement plus foncée pour le contraste */
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 2.5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    color: rgba(255, 255, 255, 0.9);
}

/* Services Section */
.services-section {
    background-color: var(--bg-secondary); /* Alternating background */
}

.service-card {
    background-color: var(--bg-main);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 25px rgba(0,0,0,0.08);
    transition: all 0.3s ease-in-out;
    height: 100%;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(42, 59, 77, 0.12); /* Shadow from bg-dark */
}

.service-icon {
    font-size: 3rem;
    color: var(--color-accent);
    margin-bottom: 20px;
    display: inline-block;
}

.service-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--color-primary);
}

.service-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    text-align: justify;
}

/* About Section */
.about-section {
    background-color: var(--bg-main);
}

.about-section .section-title-alt {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.about-logo-container {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--bg-secondary);
    padding: 2rem;
    border-radius: 10px;
    height: 100%;
    min-height: 350px;
}

.about-logo-img {
    max-width: 100%;
    max-height: 350px;
    object-fit: contain;
}

.about-section .about-text {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    line-height: 1.8;
    text-align: justify;
}

.about-section ul li {
    text-align: justify;
}

/* Clients Section */
.clients-section {
    background-color: var(--bg-secondary); /* Alternating background */
}

.client-logos-container img {
    max-width: 150px;
    transition: all 0.3s ease-in-out;
    opacity: 0.85;
}

.client-logos-container img:hover {
    opacity: 1;
    transform: scale(1.1);
}

/* Contact Section */
.contact-section {
    background-color: var(--bg-main);
}

.contact-card {
    background-color: var(--bg-secondary);
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    height: 100%;
    transition: all 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.08);
}

.contact-icon {
    font-size: 2.5rem;
    color: var(--color-accent);
    margin-bottom: 20px;
}

.contact-title {
    font-family: var(--font-primary);
    font-size: 1.4rem;
    color: var(--color-primary);
    margin-bottom: 15px;
}

.contact-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

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

.contact-text a:hover {
    color: var(--color-accent);
    text-decoration: underline;
}

/* Footer */
.footer-section {
    background-color: var(--bg-dark);
    color: var(--bg-secondary); /* Light grey for text, good contrast on dark blue */
}

.footer-section p {
    font-size: 0.9rem;
}

.footer-section a.btn-outline-light {
    color: var(--text-light);
    border-color: var(--text-light);
}

.footer-section a.btn-outline-light:hover {
    color: var(--color-accent);
    background-color: var(--text-light);
    border-color: var(--text-light);
}

/* Responsive Adjustments (Example) */
@media (max-width: 991.98px) {
    .header .nav-link {
        margin: 5px 0;
        padding: 8px 0;
    }
    .header .navbar-brand .brand-name {
        font-size: 1.5rem;
    }
    .hero-title {
        font-size: 3rem;
    }
    .hero-subtitle {
        font-size: 1.2rem;
    }
}

@media (max-width: 767.98px) {
    .section-title {
        font-size: 2.2rem;
    }
    .hero-title {
        font-size: 2.5rem;
    }
    .about-section .section-title-alt {
        font-size: 2rem;
    }
}