/* --- CHARTE GRAPHIQUE & STYLES DE BASE --- */
:root {
    --color-primary: #243B55;   /* Bleu nuit */
    --color-secondary: #2BC4A4; /* Vert menthe */
    --color-accent: #F5A623;    /* Jaune doré */
    --color-background: #F8F9FA;/* Blanc cassé */
    --color-text: #333333;      /* Gris foncé */
    --color-white: #FFFFFF;
    --color-danger: #ef4444;
    --font-titles: 'Poppins', sans-serif;
    --font-text: 'Open Sans', sans-serif;
    --shadow-light: 0 4px 15px rgba(0,0,0,0.07);
    --shadow-hover: 0 8px 25px rgba(0,0,0,0.1);
}

/* --- General Body & Typography --- */
body {
    margin: 0;
    font-family: var(--font-text);
    background-color: var(--color-background);
    color: var(--color-text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 20px;
}

h1, h2, h3 {
    font-family: var(--font-titles);
    color: var(--color-primary);
    font-weight: 700;
}

/* --- HEADER & NAVIGATION --- */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 40px;
    background-color: var(--color-white);
    box-shadow: var(--shadow-light);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo-link img {
    height: 65px;
    display: block;
}

.main-nav a {
    margin: 0 18px;
    text-decoration: none;
    color: var(--color-primary);
    font-weight: 600;
    font-family: var(--font-titles);
    font-size: 1em;
    padding-bottom: 5px;
    border-bottom: 2px solid transparent;
    transition: color 0.3s ease, border-color 0.3s ease;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--color-secondary);
    border-bottom-color: var(--color-secondary);
}

/* --- LANG SWITCHER --- */
.lang-switcher {
    margin-left: 20px;
}
.lang-switcher button {
    background: none;
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
    padding: 5px 10px;
    border-radius: 5px;
    cursor: pointer;
    margin-left: 5px;
    font-weight: bold;
    transition: background-color 0.3s, color 0.3s;
}
.lang-switcher button.active {
    background-color: var(--color-primary);
    color: var(--color-white);
}

/* --- STYLES GENERAUX DES PAGES --- */
.page-header {
    text-align: center;
    padding: 40px 20px;
    background-color: var(--color-white);
    border-bottom: 1px solid #e0e0e0;
}

.page-header h1 {
    font-size: 2.8em;
    margin: 0;
}

/* --- BOUTONS --- */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    font-family: var(--font-text);
    border: none;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-shadow: var(--shadow-light);
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
}
.btn-primary:hover {
    background-color: #345277;
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

/* --- FOOTER --- */
.main-footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    text-align: center;
    padding: 30px 20px;
    margin-top: 60px;
}
.main-footer p { margin: 0; opacity: 0.8; }

/* --- RESPONSIVE DESIGN --- */
@media (max-width: 820px) {
    .main-header { flex-direction: column; padding: 20px; }
    .main-nav { margin-top: 20px; }
}

@media (max-width: 480px) {
    .main-nav a {
        margin: 0 10px;
        font-size: 0.9em;
    }
}