/* Couleurs de base */
:root {
    --gold: #d4af37;
    --dark-gold: #aa8a2e;
    --black: #1a1a1a;
    --light-black: #2c2c2c;
    --white: #f4f4f4;
}

body {
    margin: 0;
    font-family: 'Georgia', serif;
    background-color: var(--black);
    color: var(--white);
}

/* Barre de navigation */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 50px;
    background-color: var(--light-black);
    border-bottom: 2px solid var(--gold);
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--gold);
    letter-spacing: 2px;
}

.nav-links {
    list-style: none;
    display: flex;
}

.nav-links li {
    margin-left: 20px;
}

.nav-links a {
    text-decoration: none;
    color: var(--white);
    transition: 0.3s;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--gold);
}

/* Hero Section */
.hero {
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://via.placeholder.com/1500x800'); /* Remplacer par une image d'astronomie ancienne */
    background-size: cover;
}

h1 {
    color: var(--gold);
    font-size: 3rem;
}

button {
    background-color: var(--gold);
    color: var(--black);
    border: none;
    padding: 15px 30px;
    font-size: 1rem;
    cursor: pointer;
    font-weight: bold;
    margin-top: 20px;
}

button:hover {
    background-color: var(--dark-gold);
}

/* Section Travaux */
.content-section {
    padding: 50px;
    text-align: center;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.card {
    background: var(--light-black);
    padding: 20px;
    border: 1px solid var(--gold);
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-10px);
}

.card h3 {
    color: var(--gold);
}