/* ------------------------------
   CHARTE GRAPHIQUE ONU / UNESCO
   ------------------------------ */

:root {
    --bleu-onu: #1B4F9C;
    --bleu-clair: #4A90E2;
    --gris-clair: #F5F5F5;
    --gris-fonce: #333333;
    --blanc: #FFFFFF;

    --font-titre: 'Montserrat', sans-serif;
    --font-texte: 'Open Sans', sans-serif;
}

/* ------------------------------
   GLOBAL
   ------------------------------ */

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-texte);
    background-color: var(--gris-clair);
    color: var(--gris-fonce);
}

h1, h2, h3 {
    font-family: var(--font-titre);
    color: var(--bleu-onu);
}

a {
    text-decoration: none;
    color: var(--bleu-onu);
}

.btn {
    background-color: var(--bleu-onu);
    color: var(--blanc);
    padding: 12px 20px;
    border-radius: 4px;
    display: inline-block;
    margin-top: 10px;
    font-weight: bold;
}

.btn-secondary {
    background-color: var(--bleu-clair);
    color: var(--blanc);
    padding: 10px 16px;
    border-radius: 4px;
    display: inline-block;
    margin-top: 10px;
}

/* ------------------------------
   HEADER
   ------------------------------ */

header {
    background-color: var(--blanc);
    padding: 15px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 3px solid var(--bleu-onu);
}

.logo {
    height: 60px;
    margin-right: 15px;
}

.logo-container {
    display: flex;
    align-items: center;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 25px;
}

nav a {
    font-weight: bold;
    color: var(--bleu-onu);
}

nav a.active {
    border-bottom: 2px solid var(--bleu-onu);
}

/* ------------------------------
   HERO SECTION
   ------------------------------ */

.hero {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 60px;
    background-color: var(--blanc);
}

.hero-text {
    width: 50%;
}

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

.hero-image img {
    width: 450px;
    border-radius: 8px;
}

/* ------------------------------
   MISSION
   ------------------------------ */

.mission {
    text-align: center;
    padding: 50px;
    background-color: var(--gris-clair);
}

/* ------------------------------
   PROGRAMMES
   ------------------------------ */

.programmes {
    padding: 50px;
    background-color: var(--blanc);
}

.programme-grid {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 30px;
}

.programme-card {
    background-color: var(--gris-clair);
    padding: 20px;
    border-radius: 8px;
    width: 300px;
    text-align: center;
}

.programme-card img {
    width: 100%;
    border-radius: 6px;
}

/* ------------------------------
   CTA
   ------------------------------ */

.cta {
    background-color: var(--bleu-onu);
    color: var(--blanc);
    text-align: center;
    padding: 60px 20px;
}

.cta h2 {
    color: var(--blanc);
}

/* ------------------------------
   FOOTER
   ------------------------------ */

footer {
    background-color: var(--gris-fonce);
    color: var(--blanc);
    text-align: center;
    padding: 20px;
    margin-top: 40px;
}

/* ------------------------------
   RESPONSIVE
   ------------------------------ */

@media (max-width: 900px) {

    .hero {
        flex-direction: column;
        text-align: center;
    }

    .hero-text, .hero-image {
        width: 100%;
    }

    .programme-grid {
        flex-direction: column;
        align-items: center;
    }

    nav ul {
        flex-direction: column;
        gap: 10px;
    }
}