/* --- 1. Variables & Configuration --- */
:root {
     /* Palette de couleurs */
     --color-main: #d3f1ff;        /* Bleu clair */
     --color-accent: #FF6B4A;      /* Orange/Corail */
     --color-accent-hover: #E05A3A;
     --color-text: #1F2937;        /* Gris foncé */
     --color-text-light: #4B5563;  /* Gris moyen */
     --color-footer: #242424;      /* Gris très foncé */
     --color-white: #FFFFFF;
     --color-bg-light: #F9FAFB;    /* Blanc cassé pour alternance /
     /* Espacement & Layout */
     --container-width: 1280px;
     --header-height: 80px;
     --spacing-unit: 1rem;
     --border-radius: 12px;
     
     /* Typographie */
     --font-main: 'Inter', sans-serif;
}
 /* --- 2. Reset & Base --- */
 * {
     box-sizing: border-box;
     margin: 0;
     padding: 0;
}
body {
     font-family: var(--font-main);
     color: var(--color-text);
     line-height: 1.6;
     background-color: var(--color-white);
     scroll-behavior: smooth;
}
 a {
     text-decoration: none;
     color: inherit;
     transition: color 0.2s ease;
}
 ul {
     list-style: none;
}
 img {
     max-width: 100%;
     height: auto;
     display: block;
}
 /* Utilitaires Accessibilité */
 :focus-visible {
     outline: 3px solid var(--color-accent);
     outline-offset: 2px;
}
 /* --- 3. Composants Communs --- */
 .container {
     max-width: var(--container-width);
     margin: 0 auto;
     padding: 0 1.5rem; /* Padding horizontal safe-zone */
}
 .btn {
     display: inline-block;
     padding: 0.75rem 1.5rem;
     border-radius: 50px;
     font-weight: 600;
     text-align: center;
     cursor: pointer;
     transition: all 0.2s ease;
     border: none;
}
 .btn-primary {
     background-color: var(--color-accent);
     color: var(--color-white);
     box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}
 .btn-primary:hover {
     background-color: var(--color-accent-hover);
     color: var(--color-white) !important;
     transform: translateY(-2px);
     box-shadow: 0 6px 10px rgba(0,0,0,0.15);

}
 .btn-link {
     color: var(--color-accent);
     font-weight: 500;
     padding: 0;
 }
 .btn-link:hover {
     text-decoration: underline;
}
 .section-title {
     font-size: 2rem;
     font-weight: 800;
     text-align: center;
     margin-bottom: 3rem;
     color: var(--color-text);
}
 /* Animation Fade In */
 .fade-in {
     opacity: 0;
     transform: translateY(30px);
     transition: opacity 0.6s ease-out, transform 0.6s ease-out;
 }
 .fade-in.is-visible {
     opacity: 1;
     transform: translateY(0);
}
 /* --- 4. Header & Navigation --- */
 header {
     background-color: var(--color-white);
     height: var(--header-height);
     box-shadow: 0 2px 10px rgba(0,0,0,0.05);
     position: sticky;
     top: 0;
     z-index: 1000;
}
 .navbar {
     display: flex;
     justify-content: space-between;
     align-items: center;
     height: 100%;
}
 .logo {
     display: flex;
     align-items: center;
     font-weight: 800;
     font-size: 1.5rem;
     color: var(--color-text);
}
 .logo-icon {
     display: flex;
     justify-content: center;
     align-items: center;
     width: 175px;
     height: 100px;
     margin-right: 0.5rem;
}
 /* Menu Desktop */
 .nav-links {
     display: flex;
     gap: 2rem;
     align-items: center;
}
 .nav-links a {
     font-weight: 500;
     font-size: 1rem;
}
 .nav-links a:hover {
     color: var(--color-accent);
}
 /* Hamburger Menu (Mobile) */
 .menu-toggle {
     display: none;
     background: none;
     border: none;
     cursor: pointer;
     padding: 0.5rem;
 }
 
 /* Menu Mobile Container */
 .mobile-menu {
     display: none; /* JS le passera en block */
     position: absolute;
     top: var(--header-height);
     left: 0;
     width: 100%;
     background-color: var(--color-white);
     box-shadow: 0 4px 6px rgba(0,0,0,0.1);
     padding: 1rem 0;
     z-index: 999;
}
 .mobile-menu a {
     display: block;
     padding: 0.75rem 1.5rem;
     font-weight: 500;
     color: var(--color-text);
}
 .mobile-menu a:hover {
     background-color: var(--color-main);
}
 /* --- 5. Sections --- /
 /* Hero Section */
 .hero {
     background-color: var(--color-main);
     min-height: 100vh;
     display: flex;
     padding: 5rem 0 6rem;
     text-align: center;
     align-items: center;
     position: relative;
}
 .hero h1 {
     font-size: 2.5rem;
     line-height: 1.2;
     margin-bottom: 1.5rem;
     font-weight: 800;
}
 .hero p {
     font-size: 1.125rem;
     max-width: 600px;
     margin: 0 auto 2.5rem;
     opacity: 0.9;
}
 .hero-quote {
     margin-top: 4rem;
     padding-top: 2rem;
     border-top: 1px solid rgba(0,0,0,0.1);
     max-width: 800px;
     margin-left: auto;
     margin-right: auto;
     font-style: italic;
     font-size: 1.1rem;
}

/* Services Grid */
.section-white {
    background-color: var(--color-white);
    padding: 5rem 0;
}

.section-blue {
    background-color: var(--color-main);
     padding: 5rem 0;
}
 .grid-3 {
     display: grid;
     grid-template-columns: 1fr; /* Mobile default: 1 column */
     gap: 2rem;
}
 /* Cards Style & Interaction */
 .card {
     background-color: var(--color-white);
     border-radius: var(--border-radius);
     padding: 2rem;
     border: 1px solid #E5E7EB;
     box-shadow: 0 4px 6px rgba(0,0,0,0.05);
     transition: transform 0.3s ease, box-shadow 0.3s ease;
     display: flex;
     flex-direction: column;
     align-items: flex-start;
}
 /* Effet de lévitation au survol */
 .card:hover {
     transform: translateY(-8px);
     box-shadow: 0 12px 20px rgba(0,0,0,0.1);
}
 .card-icon {
     font-size: 2.5rem;
     margin-bottom: 1rem;
     color: var(--color-accent);
}
 .card h3 {
     font-size: 1.25rem;
     margin-bottom: 0.75rem;
     color: var(--color-text);
}
 .card p {
     color: var(--color-text-light);
     margin-bottom: 1.5rem;
     flex-grow: 1; /* Pousse le lien vers le bas */
}
 /* Projets (Cards avec Images) */
 .project-card {
     background-color: var(--color-white);
     border-radius: var(--border-radius);
     overflow: hidden; /* Pour l'image */
     border: 1px solid #E5E7EB;
     box-shadow: 0 4px 6px rgba(0,0,0,0.05);
     transition: transform 0.3s ease, box-shadow 0.3s ease;
}
 .project-card:hover {
     transform: translateY(-8px);
     box-shadow: 0 12px 20px rgba(0,0,0,0.1);
}
 .project-img {
     width: 100%;
     height: 200px;
     object-fit: cover;
}
 .project-content {
     padding: 1.5rem;
}
 .project-content h3 {
     font-size: 1.25rem;
     margin-bottom: 0.5rem;
}
 .project-content p {
     color: var(--color-text-light);
}
 /* Section "À Propos" (Layout Side-by-Side) */
 .about-layout {
     display: flex;
     flex-direction: column;
     align-items: center;
     gap: 3rem;
}
 .about-img img {
     width: 300px;
     height: 300px;
     object-fit: cover;
     border-radius: 50%;
     border: 5px solid var(--color-white);
     box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}
 .about-text .label {
     text-transform: uppercase;
     font-size: 0.85rem;
     font-weight: 700;
     color: var(--color-accent);
     margin-bottom: 0.5rem;
     display: block;
}
 .about-text h2 {
     font-size: 2rem;
     margin-bottom: 1.5rem;
     line-height: 1.2;
}
 /* CTA Section Finale */
 .cta-section {
     background-color: var(--color-accent);
     color: var(--color-white);
     text-align: center;
     padding: 5rem 0;
     margin-top: 5rem;
 }
 
 .cta-section h2 {
     font-size: 2.5rem;
     margin-bottom: 1rem;
}
 .cta-section .btn-white {
     background-color: var(--color-white);
     color: var(--color-accent);
     margin-top: 2rem;
     font-size: 1.1rem;
     padding: 1rem 2.5rem;
 }
 
 .cta-section .btn-white:hover {
     background-color: #f1f1f1;
     transform: translateY(-2px);
}
 /* --- 6. Footer --- */
 footer {
     background-color: var(--color-footer);
     color: #D1D5DB; /* Gris clair pour texte sur fond foncé */
     padding: 4rem 0 2rem;
}
 .footer-grid {
     display: grid;
     grid-template-columns: 1fr;
     gap: 3rem;
     margin-bottom: 3rem;
     align-items: start;
}
 .footer-col h4 {
     color: var(--color-white);
     font-size: 1.1rem;
     margin-bottom: 1.25rem;
     font-weight: 600;
}
 .footer-col ul li {
     margin-bottom: 0.30rem;
}
 .footer-col a:hover {
     color: var(--color-main);
}
 .footer-bottom {
     border-top: 1px solid rgba(255,255,255,0.1);
     text-align: center;
     padding-top: 2rem;
     font-size: 0.9rem;
}
 .footer-col .logo-icon {
     width: 140px;
     height: auto;
     margin-bottom: 0.5rem;
     display: block;
 }
 
 /* --- 7. Responsive Media Queries (Tablette & Desktop) --- */
 @media (min-width: 768px) {
     .section-title { font-size: 2.5rem; }
     
     /* Navbar */
     .menu-toggle { display: none; }
     .nav-links { display: flex; } /* Affiche menu desktop */
     
     /* Grid Layouts */
     .grid-3 {
         grid-template-columns: repeat(3, 1fr);
     }
     
     .footer-grid {
         grid-template-columns: repeat(4, 1fr);
 }
     /* About Section */
     .about-layout {
         flex-direction: row;
         text-align: left;
     }
     .about-img {
         flex-shrink: 0;
 }
     /* Hero Typography */
     .hero h1 { font-size: 3.5rem; }
}

 /* Mobile Only Adjustments */
 @media (max-width: 767px) {
     .nav-links { display: none; } /* Cache menu desktop */
     .menu-toggle { display: block; } /* Affiche bouton burger */
     
     .hero h1 { font-size: 2rem; }
     .card { padding: 1.5rem; }
     .container { padding: 0 1rem; }
 }