/* ===================================
   Variables & Reset
   =================================== */
:root {
    /* Couleurs principales */
    --color-primary: #1a2a4e;        /* Bleu nuit */
    --color-primary-light: #2d4478;
    --color-secondary: #7ed957;      /* Vert clair */
    --color-accent: #5fb842;
    --color-white: #ffffff;
    --color-light: #f8f9fa;
    --color-gray: #6c757d;
    --color-dark: #0f1823;
    
    /* Typographie */
    --font-primary: 'Inter', sans-serif;
    --font-heading: 'Montserrat', sans-serif;
    
    /* Espacements */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
    margin-bottom: var(--spacing-sm);
}

.lead {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--color-primary);
}

/* ===================================
   Utilities
   =================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xl) 0;
}

.section-light {
    background-color: var(--color-white);
}

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

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    margin-bottom: var(--spacing-sm);
}

.title-underline {
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, var(--color-secondary), var(--color-accent));
    margin: 0 auto var(--spacing-sm);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-gray);
    max-width: 600px;
    margin: 0 auto;
}

.section-dark .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 50px;
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
    text-align: center;
}

.btn-primary {
    background-color: var(--color-secondary);
    color: var(--color-dark);
    border-color: var(--color-secondary);
}

.btn-primary:hover {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(126, 217, 87, 0.3);
}

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

.btn-secondary:hover {
    background-color: var(--color-white);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-contact {
    background-color: var(--color-white);
    color: var(--color-primary);
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
    border-color: var(--color-white);
}

.btn-contact:hover {
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
    color: var(--color-dark);
    transform: scale(1.05);
}

.btn-contact i {
    margin-right: var(--spacing-xs);
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(26, 42, 78, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem var(--spacing-md);
}

.nav-brand {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
    font-family: var(--font-heading);
}

.nav-brand i {
    margin-right: var(--spacing-xs);
    color: var(--color-secondary);
    font-size: 1.8rem;
}

.nav-logo {
    height: 50px;
    width: auto;
    transition: var(--transition);
    filter: brightness(1.1);
}

.nav-logo:hover {
    transform: scale(1.05);
    filter: brightness(1.2);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--color-white);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

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

.nav-link:hover {
    color: var(--color-secondary);
}

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

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--color-white);
    transition: var(--transition);
    border-radius: 2px;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(26, 42, 78, 0.85) 0%, rgba(45, 68, 120, 0.85) 100%),
                url('../images/hero-illustration.jpg') center center / cover no-repeat;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(126, 217, 87, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(126, 217, 87, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(255,255,255,0.03) 2px, rgba(255,255,255,0.03) 4px);
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    color: var(--color-white);
    padding: var(--spacing-md);
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    margin-bottom: var(--spacing-md);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-title .highlight {
    color: var(--color-secondary);
    display: block;
    margin-top: var(--spacing-sm);
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--color-white);
    font-size: 2rem;
    animation: bounce 2s infinite;
    cursor: pointer;
    opacity: 0.7;
}

/* ===================================
   About Section
   =================================== */
.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.expertise-card {
    background-color: var(--color-light);
    padding: var(--spacing-md);
    border-radius: 15px;
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
}

.expertise-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-secondary);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.expertise-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--color-secondary);
}

.expertise-card h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

/* ===================================
   Offers Section
   =================================== */
.offers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.offer-card {
    background-color: var(--color-white);
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.offer-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(126, 217, 87, 0.3);
}

.offer-header {
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    padding: var(--spacing-md);
    text-align: center;
    color: var(--color-white);
}

.offer-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-sm);
    background-color: rgba(126, 217, 87, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--color-secondary);
}

.offer-header h3 {
    font-size: 1.5rem;
    margin: 0;
}

.offer-content {
    padding: var(--spacing-md);
    color: var(--color-dark);
}

.offer-intro {
    font-size: 1.05rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-gray);
}

.offer-list {
    list-style: none;
}

.offer-list li {
    display: flex;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: 10px;
    transition: var(--transition);
}

.offer-list li:hover {
    background-color: var(--color-light);
}

.offer-list i {
    color: var(--color-secondary);
    font-size: 1.2rem;
    margin-right: var(--spacing-sm);
    margin-top: 2px;
    flex-shrink: 0;
}

.offer-list strong {
    color: var(--color-primary);
}

/* ===================================
   LinkedIn Posts Section
   =================================== */
.linkedin-posts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.linkedin-post-card {
    background-color: var(--color-white);
    border-radius: 20px;
    padding: var(--spacing-sm);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    overflow: hidden;
}

.linkedin-post-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(126, 217, 87, 0.2);
}

.linkedin-post-card iframe {
    border-radius: 15px;
    width: 100%;
    display: block;
}

.linkedin-cta {
    text-align: center;
    margin-top: var(--spacing-xl);
}

.btn-linkedin {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: linear-gradient(135deg, #0077b5, #005885);
    color: var(--color-white);
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    box-shadow: 0 5px 20px rgba(0, 119, 181, 0.3);
}

.btn-linkedin:hover {
    background: linear-gradient(135deg, #005885, #004060);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 119, 181, 0.4);
}

.btn-linkedin i {
    font-size: 1.5rem;
}

/* ===================================
   Contact Section
   =================================== */
.section-contact {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
}

.contact-title {
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: var(--spacing-md);
}

.contact-text {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
    line-height: 1.8;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background-color: var(--color-dark);
    color: var(--color-white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    text-align: center;
}

.footer-brand {
    display: inline-flex;
    align-items: center;
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-heading);
}

.footer-brand i {
    margin-right: var(--spacing-xs);
    color: var(--color-secondary);
}

.footer-logo {
    height: 60px;
    width: auto;
    transition: var(--transition);
    filter: brightness(1.1);
}

.footer-logo:hover {
    transform: scale(1.05);
    filter: brightness(1.2);
}

.footer-tagline {
    font-size: 1rem;
    opacity: 0.8;
    margin-bottom: var(--spacing-md);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.footer-links a {
    color: var(--color-white);
    text-decoration: none;
    transition: var(--transition);
    opacity: 0.8;
}

.footer-links a:hover {
    color: var(--color-secondary);
    opacity: 1;
}

.footer-copyright {
    opacity: 0.6;
    font-size: 0.9rem;
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(26, 42, 78, 0.98);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        padding: var(--spacing-md) 0;
        gap: 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        padding: var(--spacing-sm) 0;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .offers-grid {
        grid-template-columns: 1fr;
    }
    
    .section {
        padding: var(--spacing-lg) 0;
    }
    
    .expertise-grid,
    .linkedin-posts-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-xl: 3rem;
        --spacing-lg: 2rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero {
        min-height: 90vh;
    }
}

/* Smooth scrolling offset for fixed navbar */
section {
    scroll-margin-top: 80px;
}