/* ============================================
   ERWIN LIAM CORPORATION - STYLES PRINCIPAUX
   Couleurs: Bleu (#2C3E50, #3498DB) | Noir (#1a1a1a) | Blanc (#ffffff)
   ============================================ */

/* ========== VARIABLES GLOBALES ========== */
:root {
    /* Couleurs principales */
    --primary-blue: #2C3E50;
    --secondary-blue: #3498DB;
    --light-blue: #5DADE2;
    --dark-blue: #1A252F;
    
    /* Noir et nuances */
    --black: #000000;
    --dark-black: #1a1a1a;
    --gray-black: #2d2d2d;
    --light-black: #3a3a3a;
    
    /* Blanc et nuances */
    --white: #ffffff;
    --off-white: #f8f9fa;
    --gray-white: #ecf0f1;
    
    /* Ombres */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.1);
    
    /* Transitions */
    --transition: all 0.3s ease;
}

/* ========== RESET & BASE ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'Poppins', 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--dark-black);
    background-color: var(--off-white);
    overflow-x: hidden;
}

/* ========== TYPOGRAPHIE ========== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

h1 {
    font-size: 3.5rem;
    font-weight: 800;
}

h2 {
    font-size: 2.5rem;
    position: relative;
    display: inline-block;
}

h2:after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--secondary-blue);
}

h3 {
    font-size: 1.75rem;
}

p {
    color: var(--light-black);
    margin-bottom: 1rem;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-subtitle {
    text-align: center;
    color: var(--gray-black);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

/* ========== NAVIGATION ========== */
.navbar {
    background: linear-gradient(135deg, var(--dark-black) 0%, var(--primary-blue) 100%);
    padding: 1rem 0;
    transition: var(--transition);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--white) !important;
    transition: var(--transition);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.navbar-brand i {
    color: var(--secondary-blue);
    margin-right: 8px;
}

.nav-link {
    color: var(--white) !important;
    font-weight: 500;
    margin: 0 10px;
    transition: var(--transition);
    position: relative;
}

.nav-link:before {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary-blue);
    transition: var(--transition);
}

.nav-link:hover:before {
    width: 100%;
}

.nav-link:hover {
    color: var(--secondary-blue) !important;
    transform: translateY(-2px);
}

.active-nav {
    color: var(--secondary-blue) !important;
}

.active-nav:before {
    width: 100%;
}

/* ========== HERO SECTION ========== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--white);
}

.hero-section:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0,0,0,0.8) 0%, rgba(44,62,80,0.9) 100%);
}

.hero-section .container {
    position: relative;
    z-index: 2;
}

.hero-section h1 {
    color: var(--white);
    animation: fadeInUp 1s ease;
}

.hero-section p {
    color: var(--gray-white);
    font-size: 1.2rem;
    animation: fadeInUp 1s ease 0.2s both;
}

/* ========== BOUTONS ========== */
.btn {
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-primary {
    background: var(--secondary-blue);
    border: 2px solid var(--secondary-blue);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--primary-blue);
    border-color: var(--primary-blue);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-outline-light {
    border: 2px solid var(--white);
    color: var(--white);
}

.btn-outline-light:hover {
    background: var(--white);
    color: var(--primary-blue);
    transform: translateY(-3px);
}

.btn-dark {
    background: var(--dark-black);
    border: 2px solid var(--dark-black);
    color: var(--white);
}

.btn-dark:hover {
    background: var(--primary-blue);
    border-color: var(--primary-blue);
    transform: translateY(-3px);
}

/* ========== CARDS SECTEURS ========== */
.sector-card {
    background: var(--white);
    border-radius: 15px;
    padding: 30px 20px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    height: 100%;
    position: relative;
    overflow: hidden;
}

.sector-card:before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(52,152,219,0.1), transparent);
    transition: var(--transition);
}

.sector-card:hover:before {
    left: 100%;
}

.sector-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.sector-card i {
    color: var(--secondary-blue);
    margin-bottom: 20px;
    transition: var(--transition);
}

.sector-card:hover i {
    transform: scale(1.1);
}

.sector-card h4 {
    margin-bottom: 15px;
    color: var(--primary-blue);
}

.sector-card p {
    color: var(--light-black);
    font-size: 0.95rem;
}

/* ========== CARDS PÔLES ========== */
.pole-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    height: 100%;
    margin-bottom: 30px;
}

.pole-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.pole-card img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: var(--transition);
}

.pole-card:hover img {
    transform: scale(1.05);
}

.pole-content {
    padding: 25px;
}

.pole-content h4 {
    color: var(--primary-blue);
    margin-bottom: 15px;
}

.pole-badge {
    display: inline-block;
    padding: 5px 15px;
    background: var(--secondary-blue);
    color: var(--white);
    border-radius: 50px;
    font-size: 0.85rem;
    margin-bottom: 15px;
}

/* ========== SECTION POURQUOI NOUS CHOISIR ========== */
.why-choose-us {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    color: var(--white);
    padding: 80px 0;
}

.why-choose-us .section-title {
    color: var(--white);
}

.why-choose-us .section-title:after {
    background: var(--white);
}

.why-choose-us i {
    color: var(--secondary-blue);
    font-size: 2rem;
    margin-right: 15px;
}

.why-choose-us span {
    color: var(--white);
    font-size: 1.1rem;
}

/* ========== IMPACT SOCIAL ========== */
.social-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    margin-bottom: 30px;
}

.social-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.social-img {
    height: 200px;
    overflow: hidden;
}

.social-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.social-card:hover .social-img img {
    transform: scale(1.1);
}

.social-content {
    padding: 20px;
}

.social-content h4 {
    color: var(--primary-blue);
    margin-bottom: 10px;
}

/* ========== FORMULAIRES ========== */
.form-control {
    border: 2px solid var(--gray-white);
    border-radius: 10px;
    padding: 12px 15px;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--secondary-blue);
    box-shadow: 0 0 0 0.2rem rgba(52,152,219,0.25);
}

label {
    font-weight: 600;
    color: var(--primary-blue);
    margin-bottom: 8px;
}

/* ========== CONTACT SECTION ========== */
.contact-info {
    background: var(--white);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    transition: var(--transition);
    height: 100%;
    box-shadow: var(--shadow-sm);
}

.contact-info:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.contact-info i {
    font-size: 3rem;
    color: var(--secondary-blue);
    margin-bottom: 20px;
}

.contact-info h4 {
    color: var(--primary-blue);
    margin-bottom: 15px;
}

.contact-info p {
    margin-bottom: 5px;
}

/* ========== GALERIE ========== */
.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 15px;
    margin-bottom: 30px;
    cursor: pointer;
}

.gallery-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: var(--transition);
}

.gallery-overlay {
    position: absolute;
    bottom: -100%;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
    color: var(--white);
    padding: 20px;
    transition: var(--transition);
}

.gallery-item:hover .gallery-overlay {
    bottom: 0;
}

.gallery-item:hover img {
    transform: scale(1.1);
}

/* ========== FOOTER ========== */
footer {
    background: linear-gradient(135deg, var(--dark-black) 0%, var(--primary-blue) 100%);
    padding: 60px 0 20px;
}

footer h5 {
    color: var(--white);
    margin-bottom: 20px;
}

footer p, footer li {
    color: var(--gray-white);
}

footer a {
    transition: var(--transition);
}

footer a:hover {
    color: var(--secondary-blue) !important;
    transform: translateX(5px);
}

.social-links a {
    display: inline-block;
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--secondary-blue);
    transform: translateY(-3px);
}

/* ========== ANIMATIONS ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in-up {
    animation: fadeInUp 1s ease;
}

.fade-in-left {
    animation: fadeInLeft 1s ease;
}

.fade-in-right {
    animation: fadeInRight 1s ease;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    h3 {
        font-size: 1.4rem;
    }
    
    .hero-section {
        min-height: 70vh;
    }
    
    .sector-card, .pole-card {
        margin-bottom: 20px;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .contact-info {
        margin-bottom: 20px;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 20px;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
}

/* ========== LOADER ========== */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--white);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: var(--transition);
}

.loader.hide {
    opacity: 0;
    visibility: hidden;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid var(--gray-white);
    border-top-color: var(--secondary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ========== BACK TO TOP ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--secondary-blue);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-blue);
    transform: translateY(-5px);
}

/* ========== STATS SECTION ========== */
.stat-box {
    text-align: center;
    padding: 30px;
    background: var(--white);
    border-radius: 15px;
    transition: var(--transition);
}

.stat-box:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--secondary-blue);
    display: block;
}

.stat-label {
    color: var(--primary-blue);
    font-weight: 600;
    margin-top: 10px;
}

/* ========== UTILITAIRES ========== */
.text-primary-custom {
    color: var(--secondary-blue) !important;
}

.bg-primary-custom {
    background: var(--primary-blue) !important;
}

.bg-dark-custom {
    background: var(--dark-black) !important;
}

.text-dark-custom {
    color: var(--dark-black) !important;
}

.shadow-custom {
    box-shadow: var(--shadow-lg);
}

.rounded-custom {
    border-radius: 15px !important;
}