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

:root {
    --vert: #2e7d32;
    --orange: #f57c00;
    --blanc: #ffffff;
    --gris: #f3f3f3;
}

body {
    color: #333;
    background: var(--blanc);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

/* HEADER */
.header {
    background: var(--blanc);
    border-bottom: 4px solid var(--vert);
}

.header-flex {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
}

.logo {
    height: 70px;
}

.header-info h1 {
    color: var(--vert);
}

.btn-call {
    background: var(--orange);
    color: var(--blanc);
    padding: 12px 18px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
}

/* HERO */
.hero {
    background: linear-gradient(rgba(0,0,0,0.55), rgba(0,0,0,0.55)),
                url("NETTOYAGE-FACADE.png") center/cover no-repeat;
    color: var(--blanc);
    text-align: center;
    padding: 90px 0;
}

.hero h2 {
    font-size: 32px;
    margin-bottom: 15px;
}

.btn-main {
    display: inline-block;
    margin-top: 25px;
    background: var(--orange);
    color: var(--blanc);
    padding: 15px 25px;
    text-decoration: none;
    border-radius: 5px;
    font-size: 18px;
}

/* SERVICES */
.services {
    background: var(--gris);
    padding: 60px 0;
}

.services h2 {
    text-align: center;
    color: var(--vert);
    margin-bottom: 40px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.service {
    background: var(--blanc);
    padding: 20px;
    text-align: center;
    border-left: 5px solid var(--orange);
    font-weight: bold;
}

/* REALISATION */
.realisation {
    padding: 60px 0;
}

.realisation-flex {
    display: flex;
    gap: 40px;
    align-items: center;
}

.realisation img {
    max-width: 450px;
    border-radius: 8px;
}

/* ZONES */
.zones {
    background: var(--vert);
    color: var(--blanc);
    padding: 60px 0;
}

.zones h2 {
    margin-bottom: 20px;
}

/* CONTACT */
.contact {
    padding: 50px 0;
    text-align: center;
}

.contact a {
    color: var(--vert);
    font-weight: bold;
    text-decoration: none;
}

/* FOOTER */
.footer {
    background: #222;
    color: var(--blanc);
    text-align: center;
    padding: 20px;
}

/* RESPONSIVE */
@media (max-width: 900px) {
    .header-flex,
    .realisation-flex {
        flex-direction: column;
        text-align: center;
    }

    .realisation img {
        max-width: 100%;
    }
}