/* === PALETTE SOBRE & ÉLÉGANTE === */
        :root {
            --anthracite: #2C2D37;
            --off-white: #FCFAf9;
            --warm-gray: #7D7A78;
            --copper: #B88164; /* L'accent sobre de la maquette */
            --white: #FFFFFF;
            --border-color: #E0DEDC;
        }
 
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            background-color: var(--white);
            color: var(--anthracite);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        /* === TYPOGRAPHIE & BASES === */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            
        }
 
        h1, h2, h3 {
            font-weight: 300; /* Plus fin pour plus d'élégance */
            letter-spacing: 1px;
        }
 
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
 
        /* === NAVIGATION === */
        header {
            padding: 25px 50px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: var(--white);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
 
        .logo-img {
            height: 32px;
            width: auto;
            display: block;
        }

        .nav-links {
            display: flex;
            gap: 30px;
            list-style: none;
        }
 
        .nav-links a {
            text-decoration: none;
            color: var(--anthracite);
            font-size: 13px;
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: color 0.3s;
        }
 
        .nav-links a:hover {
            color: var(--copper);
        }
 
        .btn-inscription {
            background: var(--copper);
            color: var(--white);
            padding: 10px 25px;
            text-transform: uppercase;
            font-size: 12px;
            border-radius: 2px;
            text-decoration: none;
            font-weight: 600;
        }

        /* === AUTH FORMS === */
        .auth {
            width: 100%;
            max-width: 400px;
            margin: 60px auto;
            padding: 0 20px;
        }

        .auth-title {
            text-align: center;
            margin-bottom: 30px;
        }

        .auth-form p {
            margin-bottom: 16px;
        }

        .auth-form label {
            display: block;
            font-size: 13px;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 6px;
            color: var(--warm-gray);
        }

        .auth-form input {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 2px;
            font-size: 14px;
        }

        .auth-form input:focus {
            outline: none;
            border-color: var(--copper);
        }

        .auth-form .helptext,
        .auth-form ul {
            font-size: 11px;
            color: var(--warm-gray);
            margin-top: 4px;
            padding-left: 16px;
        }

        .auth-form button {
            width: 100%;
            border: none;
            cursor: pointer;
            margin-top: 8px;
            padding: 12px;
        }

        .auth-switch {
            text-align: center;
            margin-top: 20px;
            font-size: 14px;
        }

        .auth-switch a {
            color: var(--copper);
        }

        /* === BURGER MENU (mobile) === */
        .burger {
            display: none;
            flex-direction: column;
            justify-content: space-between;
            width: 26px;
            height: 18px;
            cursor: pointer;
            z-index: 1001;
        }

        .burger span {
            display: block;
            height: 2px;
            width: 100%;
            background: var(--anthracite);
            border-radius: 2px;
            transition: transform 0.3s, opacity 0.3s;
        }

        /* Animate burger into an "X" when open */
        .nav-toggle:checked ~ .burger span:nth-child(1) {
            transform: translateY(8px) rotate(45deg);
        }
        .nav-toggle:checked ~ .burger span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle:checked ~ .burger span:nth-child(3) {
            transform: translateY(-8px) rotate(-45deg);
        }
 
        /* === HERO SECTION === */

        main {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }

        .hero {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            align-items: center;
            min-height: 80vh;
            background-color: var(--off-white);
        }
 
        .hero-text {
            padding: 60px;
        }
 
        .hero h1 {
            font-size: 42px;
            margin-bottom: 20px;
            line-height: 1.1;
        }
 
        .hero p {
            color: var(--warm-gray);
            margin-bottom: 35px;
            font-size: 18px;
        }
 
        .hero-image {
            height: 100%;
            background: url('https://images.unsplash.com/photo-1518611012118-696072aa579a?ixlib=rb-4.0.3&auto=format&fit=crop&w=1000&q=80') center/cover no-repeat;
        }
 
        .btn-cta {
            background: var(--anthracite);
            color: var(--white);
            padding: 18px 40px;
            text-decoration: none;
            display: inline-block;
            text-transform: uppercase;
            font-size: 13px;
            letter-spacing: 1.5px;
            transition: opacity 0.3s;
        }
 
        /* === SECTION : NOTRE UNIVERS === */
        .univers {
            padding: 100px 0;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 80px;
            align-items: center;
        }
 
        .univers h2 {
            font-size: 32px;
            margin-bottom: 30px;
        }
 
        .univers ul {
            list-style: none;
            margin-top: 30px;
        }
 
        .univers li {
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            font-size: 16px;
        }
 
        .univers li::before {
            content: "✓";
            color: var(--copper);
            margin-right: 15px;
            font-weight: bold;
        }
 
        .univers-image {
            width: 100%;
            height: 400px;
            background: url('https://placehold.co/800x600/F4F4F4/2C2D37?text=Image+Univers:+Deux+femmes+discutant+au+studio') center/cover no-repeat;
            border-radius: 4px;
        }
 
        /* === GRID : POURQUOI FITNYS === */
        .pourquoi {
            padding: 100px 0;
            text-align: center;
        }
 
        .grid-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 50px;
        }
 
        .card {
            background: var(--off-white);
            padding: 40px;
            border-bottom: 2px solid transparent;
            transition: border-color 0.3s;
        }
 
        .card:hover {
            border-color: var(--copper);
        }
 
        .card h3 {
            font-size: 16px;
            margin-bottom: 15px;
        }
 
        /* === FAQ === */
        .faq {
            padding: 100px 0;
            background: var(--off-white);
        }
 
        .faq-item {
            background: var(--white);
            margin-bottom: 10px;
            border: 1px solid var(--border-color);
        }
 
        .faq-question {
            padding: 20px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            font-size: 14px;
            font-weight: 500;
        }
 
        /* === FOOTER === */
        footer {
            padding: 16px 0;
            background: var(--anthracite);
            color: var(--white);
            text-align: center;
        }
 
        footer .address {
            color: var(--warm-gray);
            margin: 10px 0;
            font-size: 14px;
        }

 
        @media (max-width: 768px) {
            .hero, .univers, .grid-cards { grid-template-columns: 1fr; }
            .hero-image { display: none; }
            .hero-text { padding: 40px 20px; }

            header { padding: 20px 25px; }

            .burger { display: flex; }

            /* Dropdown panel under the header */
            nav {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--white);
                border-bottom: 1px solid var(--border-color);
                overflow: hidden;
                max-height: 0;
                transition: max-height 0.35s ease;
            }

            .nav-toggle:checked ~ nav {
                max-height: 400px;
            }

            .nav-links {
                flex-direction: column;
                gap: 0;
                padding: 10px 0;
            }

            .nav-links li {
                width: 100%;
            }

            .nav-links a {
                display: block;
                padding: 16px 25px;
                font-size: 14px;
            }

            /* Keep the inscription button looking like a button inside the menu */
            .nav-links .btn-inscription {
                display: inline-block;
                margin: 12px 25px;
                width: auto;
                padding: 12px 25px;
                color: var(--white);
            }
        }