:root {
    --navy: #0f172a;
    --navy-light: #1e293b;
    --orange: #f97316;
    --orange-light: #fb923c;
    --text-light: #f8fafc;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Helvetica Neue", Arial, sans-serif;
    color: var(--navy);
    background: var(--text-light);
}

header {
    background: var(--navy);
    color: var(--text-light);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

header strong {
    font-size: 1.3rem;
    letter-spacing: 0.02em;
}

header nav a {
    color: var(--text-light);
    text-decoration: none;
    margin-left: 1.5rem;
    font-weight: 600;
}

header nav a:hover {
    color: var(--orange-light);
}

.hero-image, .page-image {
    width: 100%;
    height: 280px;
    object-fit: cover;
    display: block;
}

.hero {
    padding: 3rem 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.hero h1 {
    color: var(--navy);
}

main, .content {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

.image-placeholder {
    width: 100%;
    max-width: 500px;
    height: 320px;
    margin: 1.5rem auto;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--navy-light);
    color: var(--text-light);
    border: 3px dashed var(--orange);
    border-radius: 8px;
    font-weight: 600;
    font-size: 1.1rem;
}

.cours-list {
    list-style: none;
    padding: 0;
    display: grid;
    gap: 1.5rem;
}

.cours-card {
    background: var(--navy-light);
    color: var(--text-light);
    border-radius: 8px;
    padding: 1.5rem;
    border-left: 5px solid var(--orange);
}

.cours-card h3 {
    margin-top: 0;
    color: var(--orange-light);
}

address {
    font-style: normal;
}