/* Variables de couleurs */
:root {
    --primary-blue: #0056b3;
    --dark-blue: #003d82;
    --light-blue: #e6f0ff;
    --white: #ffffff;
    --light-gray: #f5f5f5;
    --text-dark: #333333;
    --text-light: #666666;
}

/* Reset et styles de base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

section {
    padding: 80px 0;
}

h1, h2, h3, h4 {
    margin-bottom: 20px;
    color: var(--dark-blue);
}

p {
    margin-bottom: 15px;
    color: var(--text-light);
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--primary-blue);
    color: var(--white);
    text-decoration: none;
    border-radius: 4px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-transform: uppercase;
    font-size: 14px;
    letter-spacing: 1px;
}

.btn:hover {
    background-color: var(--dark-blue);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
    position: relative;
}

.section-title:after {
    content: '';
    display: block;
    width: 80px;
    height: 3px;
    background-color: var(--primary-blue);
    margin: 15px auto 0;
}

/* Header */
header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    z-index: 1000;
    top: 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-img img {
    max-width: 200px;
    height: auto;
    display: block;
}

.logo h2 {
    color: var(--primary-blue);
    font-size: 24px;
    margin-bottom: 0;
    font-weight: 700;
}

.logo span {
    color: var(--dark-blue);
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
    text-transform: uppercase;
    font-size: 14px;
    letter-spacing: 1px;
}

nav ul li a:hover {
    color: var(--primary-blue);
}

.mobile-menu {
    display: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--primary-blue);
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0, 86, 179, 0.85), rgba(0, 61, 130, 0.85)), url('https://images.unsplash.com/photo-1581094794329-c8112a89af12?ixlib=rb-4.0.3&auto=format&fit=crop&w=1950&q=80');
    background-size: cover;
    background-position: center;
    color: var(--white);
    text-align: center;
    padding: 180px 0 100px;
    margin-top: 80px;
}

.hero h2 {
    font-size: 42px;
    margin-bottom: 20px;
    color: var(--white);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 700;
}

.hero p {
    font-size: 18px;
    max-width: 700px;
    margin: 0 auto 30px;
    color: var(--white);
    line-height: 1.8;
}

/* Welcome Section */
.welcome {
    background-color: var(--white);
}

.welcome-container {
    display: flex;
    align-items: center;
    gap: 50px;
}

.welcome-content {
    flex: 1;
}

.welcome-content h2 {
    font-size: 32px;
    color: var(--dark-blue);
    margin-bottom: 25px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.welcome-content h2 span {
    display: block;
    font-size: 24px;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.welcome-content p {
    margin-bottom: 25px;
    line-height: 1.8;
}

.welcome-video {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.welcome-video video {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

/* Services Section */
.services {
    background-color: var(--light-gray);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
}

.service-card:hover {
    transform: translateY(-10px);
}

.service-img {
    height: 200px;
    background-color: var(--light-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-blue);
    font-size: 60px;
}

.service-content {
    padding: 25px;
}

.service-content h3 {
    margin-bottom: 15px;
    color: var(--dark-blue);
}

/* Products Section */
.products {
    background-color: var(--white);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.product-card {
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    border: 1px solid #eee;
    transition: transform 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
}

.product-img {
    height: 200px;
    background-color: var(--light-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-blue);
    font-size: 60px;
}

.product-content {
    padding: 20px;
    text-align: center;
}

/* Models Section */
.models {
    background-color: var(--light-gray);
}

.models-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 10px;
}

.tab-btn {
    padding: 12px 25px;
    background-color: var(--white);
    border: none;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-dark);
    transition: all 0.3s;
    border-bottom: 3px solid transparent;
    border-radius: 4px;
}

.tab-btn.active {
    color: var(--primary-blue);
    border-bottom: 3px solid var(--primary-blue);
    background-color: var(--light-blue);
}

.tab-btn:hover {
    background-color: var(--light-blue);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.model-card {
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
}

.model-card:hover {
    transform: translateY(-5px);
}

.model-img {
    height: 220px;
    background-color: var(--light-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-blue);
    font-size: 70px;
}

.model-content {
    padding: 25px;
}

.model-content h3 {
    margin-bottom: 15px;
    color: var(--dark-blue);
}

.model-features {
    list-style: none;
    margin: 15px 0;
}

.model-features li {
    padding: 8px 0;
    border-bottom: 1px solid #eee;
    display: flex;
    align-items: center;
}

.model-features li:last-child {
    border-bottom: none;
}

.model-features li i {
    color: var(--primary-blue);
    margin-right: 10px;
}

/* Process Section */
.process {
    background-color: var(--white);
}

.process-steps {
    display: flex;
    justify-content: space-between;
    position: relative;
    margin-top: 50px;
}

.process-steps:before {
    content: '';
    position: absolute;
    top: 40px;
    left: 0;
    right: 0;
    height: 3px;
    background-color: var(--light-blue);
    z-index: 1;
}

.process-step {
    text-align: center;
    position: relative;
    z-index: 2;
    flex: 1;
}

.step-number {
    width: 80px;
    height: 80px;
    background-color: var(--primary-blue);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 24px;
    font-weight: bold;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.step-content {
    padding: 0 15px;
}

.step-content h3 {
    margin-bottom: 15px;
    color: var(--dark-blue);
}

/* Values Section */
.values {
    background-color: var(--light-gray);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.value-item {
    text-align: center;
    padding: 30px;
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
}

.value-item:hover {
    transform: translateY(-5px);
}

.value-icon {
    width: 80px;
    height: 80px;
    background-color: var(--light-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--primary-blue);
    font-size: 30px;
}

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

.contact-container {
    display: flex;
    gap: 50px;
}

.contact-info {
    flex: 1;
}

.contact-info-item {
    display: flex;
    align-items: center;
    margin-bottom: 25px;
    padding: 20px;
    background-color: var(--light-gray);
    border-radius: 8px;
}

.contact-info-icon {
    width: 50px;
    height: 50px;
    background-color: var(--light-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    color: var(--primary-blue);
    font-size: 20px;
}

.contact-form {
    flex: 1;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 2px rgba(0, 86, 179, 0.1);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

/* Footer */
footer {
    background-color: var(--dark-blue);
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3 {
    color: var(--white);
    margin-bottom: 25px;
    position: relative;
}

.footer-col h3:after {
    content: '';
    display: block;
    width: 40px;
    height: 2px;
    background-color: var(--white);
    margin-top: 10px;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-col ul li a:hover {
    color: var(--white);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--white);
    transition: all 0.3s;
    text-decoration: none;
}

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

.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 14px;
    color: #ccc;
}

/* ==================== */
/* RESPONSIVE DESIGN */
/* ==================== */

/* Tablettes */
@media (max-width: 992px) {
    .welcome-container {
        flex-direction: column;
    }
    
    .contact-container {
        flex-direction: column;
    }
    
    .process-steps {
        flex-direction: column;
        gap: 40px;
    }
    
    .process-steps:before {
        display: none;
    }
    
    .process-step {
        display: flex;
        align-items: flex-start;
        text-align: left;
    }
    
    .step-number {
        margin: 0 20px 0 0;
        min-width: 80px;
    }
    
    .hero h2 {
        font-size: 36px;
    }
}

/* Mobiles */
@media (max-width: 768px) {
    nav ul {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    }
    
    nav ul.show {
        display: flex;
    }
    
    nav ul li {
        margin: 10px 0;
        width: 100%;
    }
    
    nav ul li a {
        display: block;
        padding: 10px 0;
        border-bottom: 1px solid #eee;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .hero {
        padding: 150px 0 80px;
        margin-top: 70px;
    }
    
    .hero h2 {
        font-size: 28px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .models-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .tab-btn {
        width: 100%;
        max-width: 300px;
        margin-bottom: 10px;
    }
    
    .welcome-content h2 {
        font-size: 24px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    section {
        padding: 60px 0;
    }
}

/* Très petits mobiles */
@media (max-width: 480px) {
    .container {
        width: 95%;
    }
    
    .hero h2 {
        font-size: 24px;
    }
    
    .hero p {
        font-size: 14px;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 12px;
    }
    
    .services-grid,
    .products-grid,
    .models-grid,
    .values-grid {
        grid-template-columns: 1fr;
    }
    
    .logo {
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }
    
    .logo h2 {
        font-size: 20px;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

/* Correction pour le header fixe */
html {
    scroll-padding-top: 80px;
}

/* Animation pour le scroll */
@media (prefers-reduced-motion: no-preference) {
    .service-card,
    .product-card,
    .model-card,
    .value-item {
        transition: all 0.3s ease;
    }
}