* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #0ea5e9;
    --dark: #1e293b;
    --light: #f8fafc;
    --gray: #64748b;
    --white: #ffffff;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark);
}

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

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--dark);
    transition: 0.3s;
}

/* ========================================
   HERO SECTION (PAGE ACCUEIL)
======================================== */
.hero {
    margin-top: 80px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    padding: 8rem 2rem;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    animation: fadeInUp 0.8s 0.2s backwards;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--white);
    color: var(--primary);
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: transform 0.3s, box-shadow 0.3s;
    animation: fadeInUp 0.8s 0.4s backwards;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

/* ========================================
   PAGE HEADER (AUTRES PAGES)
======================================== */
.page-header {
    margin-top: 80px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    padding: 5rem 2rem;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.95;
}

/* ========================================
   SECTIONS GÉNÉRALES
======================================== */
section {
    padding: 5rem 2rem;
}

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

h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--dark);
}

/* ========================================
   INTRO SECTION (ACCUEIL)
======================================== */
.intro {
    background: var(--light);
}

.intro-text {
    text-align: center;
    font-size: 1.2rem;
    color: var(--gray);
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.8;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-item {
    text-align: center;
    padding: 2rem;
    background: var(--white);
    border-radius: 15px;
    transition: transform 0.3s;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-item h3 {
    color: var(--primary);
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.feature-item p {
    color: var(--gray);
}

/* ========================================
   SERVICES SECTION
======================================== */
.services-section {
    background: var(--light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    color: var(--primary);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.service-card p {
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.service-features {
    list-style: none;
    padding-left: 0;
}

.service-features li {
    padding: 0.5rem 0;
    color: var(--gray);
}

.service-features li::before {
    content: "✓ ";
    color: var(--primary);
    font-weight: bold;
    margin-right: 0.5rem;
}

/* ========================================
   ABOUT SECTION
======================================== */
.about-section {
    background: var(--light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    margin-bottom: 4rem;
}

.about-text h2 {
    text-align: left;
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: var(--gray);
    font-size: 1.1rem;
    line-height: 1.8;
}

.about-image {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    height: 400px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8rem;
    color: var(--white);
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
    padding: 2rem;
    background: var(--white);
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary);
}

.stat-label {
    color: var(--gray);
    margin-top: 0.5rem;
    font-size: 1.1rem;
}

/* ========================================
   VALUES SECTION
======================================== */
.values-section {
    background: var(--white);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.value-card {
    text-align: center;
    padding: 2.5rem;
    background: var(--light);
    border-radius: 15px;
    transition: transform 0.3s;
}

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

.value-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.value-card h3 {
    color: var(--primary);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.value-card p {
    color: var(--gray);
    line-height: 1.8;
}

/* ========================================
   CONTACT SECTION
======================================== */
.contact-section {
    background: var(--light);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info h2 {
    text-align: left;
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.contact-info p {
    color: var(--gray);
    margin-bottom: 2rem;
    line-height: 1.8;
    font-size: 1.1rem;
}

.contact-detail {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    background: var(--white);
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.contact-detail span {
    font-size: 1.8rem;
}

.contact-detail strong {
    color: var(--primary);
    display: block;
    margin-bottom: 0.3rem;
}

.contact-detail div {
    color: var(--gray);
    line-height: 1.6;
}

/* ========================================
   FORMULAIRE DE CONTACT
======================================== */
.contact-form {
    background: var(--white);
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.contact-form h2 {
    text-align: left;
    font-size: 1.8rem;
    margin-bottom: 2rem;
}

form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

label {
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark);
}

input, 
textarea, 
select {
    padding: 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s;
}

input:focus, 
textarea:focus, 
select:focus {
    outline: none;
    border-color: var(--primary);
}

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

select {
    cursor: pointer;
}

button[type="submit"] {
    padding: 1rem 2rem;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s, transform 0.3s;
}

button[type="submit"]:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* ========================================
   CTA SECTION
======================================== */
.cta-section {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    text-align: center;
    padding: 5rem 2rem;
}

.cta-section h2 {
    color: var(--white);
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary, 
.btn-secondary {
    display: inline-block;
    padding: 1rem 2.5rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn-primary {
    background: var(--white);
    color: var(--primary);
}

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

.btn-primary:hover, 
.btn-secondary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

/* ========================================
   FOOTER
======================================== */
footer {
    background: var(--dark);
    color: var(--white);
    text-align: center;
    padding: 3rem 2rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.social-links a {
    color: var(--white);
    font-size: 1.5rem;
    transition: color 0.3s, transform 0.3s;
    text-decoration: none;
}

.social-links a:hover {
    color: var(--secondary);
    transform: scale(1.2);
}

.footer-content p {
    color: rgba(255, 255, 255, 0.7);
}

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

/* ========================================
   RESPONSIVE DESIGN
======================================== */
@media (max-width: 768px) {
    /* Navigation mobile */
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 2rem;
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        display: none;
    }

    .nav-links.active {
        display: flex;
    }

    /* Hero et page headers */
    .hero h1, 
    .page-header h1 {
        font-size: 2rem;
    }

    .hero p, 
    .page-header p {
        font-size: 1.1rem;
    }

    /* Grids en une colonne */
    .about-content,
    .contact-container {
        grid-template-columns: 1fr;
    }

    .about-image {
        height: 300px;
        font-size: 6rem;
    }

    .stats,
    .features,
    .services-grid,
    .values-grid {
        grid-template-columns: 1fr;
    }

    /* Titres */
    h2 {
        font-size: 2rem;
    }

    .about-text h2,
    .contact-info h2,
    .contact-form h2 {
        font-size: 1.8rem;
    }

    /* Boutons CTA */
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        max-width: 300px;
    }

    /* Formulaire */
    .contact-form {
        padding: 2rem;
    }

    /* Sections */
    section {
        padding: 3rem 1rem;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1.5rem;
    }

    .hero,
    .page-header {
        padding: 5rem 1rem;
    }

    .service-card,
    .value-card,
    .feature-item {
        padding: 1.5rem;
    }
}