body {
    margin: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    color: #222;
    background: #f5f5f5;
}

/* HEADER très fin */
header {
    background: #fff;
    height: 35px;              /* ˜ 1 cm écran */
    padding: 0 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #ddd;
}

/* Logo */
.logo {
    font-size: 18px;
    font-weight: bold;
}

/* Menu */
nav a {
    margin-left: 20px;
    text-decoration: none;
    color: #333;
    font-size: 13px;
}

/* HERO */
.hero {
    height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero h1 {
    color: #fff;
    background: rgba(0,0,0,0.5);
    padding: 15px;
    font-size: 32px;
}

/* CONTENU */
.container {
    padding: 40px;
    max-width: 1200px;
    margin: auto;
}

/* GRID */
.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

/* CARD */
.card {
    background: #fff;
    border-radius: 5px;
    overflow: hidden;
}

.card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.card h3 {
    padding: 12px;
    text-align: center;
    font-size: 15px;
}

/* FOOTER */
footer {
    background: #111;
    color: #ccc;
    text-align: center;
    padding: 20px;
}

/* RESPONSIVE */
@media (max-width: 900px) {
    .grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .grid {
        grid-template-columns: 1fr;
    }
}