/* RESET */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

/* FOND DEGRADE NOIR / GRIS */
body {
    background: linear-gradient(
        180deg,
        #111 0%,
        #0b0b0b 40%,
        #000 100%
    );
    color: #fff;
    min-height: 100vh;
}

/* ANIMATION LEGERE */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* NAVBAR */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: linear-gradient(180deg, #111, #000);
    padding: 15px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #d4af3722;
    animation: fadeUp 0.6s ease;
    z-index: 1000;
}

/* LOGO */
.logo {
    color: #d4af37;
    font-weight: bold;
    font-size: 22px;
    letter-spacing: 2px;
}

/* BOUTONS NAV (moins arrondis) */
.nav a {
    margin-left: 15px;
    padding: 10px 18px;
    border-radius: 8px;
    text-decoration: none;
    color: #000;
    background: linear-gradient(145deg, #d4af37, #bfa75f);
    font-weight: bold;
    font-size: 14px;
}

/* SECTIONS */
section {
    padding: 130px 10% 80px;
    animation: fadeUp 0.8s ease;
}

/* TITRES */
h1 {
    color: #d4af37;
    margin-bottom: 10px;
    text-align: center;
}

p {
    text-align: center;
    opacity: 0.85;
}

/* GRILLE CHANTIERS */
.grid {
    margin-top: 40px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 25px;
}

/* CARTES */
.card {
    background: linear-gradient(180deg, #151515, #0f0f0f);
    padding: 25px;
    border-radius: 12px;
    border: 1px solid #d4af3722;
}

/* FORMULAIRE – CENTRÉ */
.form-wrapper {
    margin-top: 40px;
    display: flex;
    justify-content: center;
}

form {
    width: 100%;
    max-width: 480px;
    background: linear-gradient(180deg, #141414, #0d0d0d);
    padding: 30px;
    border-radius: 14px;
    border: 1px solid #d4af3722;
}

/* INPUTS */
input, textarea {
    width: 100%;
    margin-bottom: 14px;
    padding: 13px;
    background: #0f0f0f;
    border: 1px solid #d4af3744;
    border-radius: 6px;
    color: #fff;
}

/* BOUTON */
button {
    width: 100%;
    padding: 14px;
    border-radius: 8px;
    border: none;
    background: linear-gradient(145deg, #d4af37, #bfa75f);
    font-weight: bold;
    cursor: pointer;
}

/* CONTACT */
.contact-box {
    margin: 50px auto 0;
    max-width: 500px;
    background: linear-gradient(180deg, #141414, #0d0d0d);
    padding: 30px;
    border-radius: 14px;
    border: 1px solid #d4af3722;
    text-align: center;
}

.contact-box p {
    margin: 15px 0;
    font-size: 16px;
}

.contact-box a {
    display: inline-block;
    margin-top: 20px;
    padding: 12px 22px;
    border-radius: 8px;
    background: linear-gradient(145deg, #d4af37, #bfa75f);
    color: #000;
    text-decoration: none;
    font-weight: bold;
}