body {
    margin: 0;
    /* Bleu clair plus perceptible : dégradé doux mais bien visible */
    background: linear-gradient(135deg, #9bc5f0 0%, #b0d4ff 100%);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #1e2a6e;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    max-width: 800px;
    background: rgba(240, 240, 255, 0.96);
    border-radius: 28px;
    padding: 2rem;
    box-shadow: 0 20px 35px rgba(0, 0, 0, 0.08);
    backdrop-filter: blur(2px);
    transition: transform 0.3s ease;
}

/* Conteneur du logo : cercle blanc sans rognage */
.logo-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 20px;
    width: 120px;
    height: 120px;
    background: white;
    border-radius: 50%;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    border: 2px solid #cbdde9;
    transition: 0.2s;
}

.logo-wrapper:hover {
    border-color: #9bb7d0;
}

.logo {
    display: block;
    max-width: 80%;
    max-height: 80%;
    width: auto;
    height: auto;
    object-fit: contain;
}

h1 {
    text-align: center;
    color: #1e4663;
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.tagline {
    text-align: center;
    color: #4a627a;
    margin-bottom: 2rem;
    font-size: 1.1rem;
    font-weight: bold;
}

.card {
    background: #ffffff;
    border-radius: 20px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.03), 0 1px 3px rgba(0, 0, 0, 0.05);
    transition: 0.2s;
    border: 1px solid #e9f0f5;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 22px rgba(0, 0, 0, 0.08);
    border-color: #d4e2ed;
}

.btn {
    display: inline-block;
    background: #2c7a5e;
    color: white;
    padding: 12px 28px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: background 0.25s, transform 0.1s;
    margin-top: 8px;
}

.btn:hover {
    background: #1f5e48;
    transform: scale(1.01);
}

footer {
    text-align: center;
    font-size: 0.8rem;
    color: #6c8db0;
    margin-top: 2rem;
}

/* Sélecteur de langue */
.lang-selector {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.8rem;
}

.lang-btn {
    background: #eef3fc;
    border: 1px solid #cde0ed;
    padding: 8px 20px;
    border-radius: 40px;
    font-size: 1rem;
    cursor: pointer;
    transition: 0.2s;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: #1e3a5f;
}

.lang-btn.active {
    background: #2c5a7a;
    border-color: #2c5a7a;
    color: white;
    box-shadow: 0 2px 8px rgba(44, 90, 122, 0.2);
}

.lang-btn:hover:not(.active) {
    background: #e2eff9;
    border-color: #bdd4e4;
}

/* Utilitaires */
.divider-light {
    height: 1px;
    background: #e2edf6;
    margin: 1rem 0;
}

.inline-code {
    background: #eef3fc;
    padding: 0.2rem 0.5rem;
    border-radius: 12px;
    font-family: monospace;
    font-size: 0.9em;
    color: #1e4663;
}

.card h2 {
    margin-top: 1.2rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
    color: #1e4663;
}

.card h2:first-of-type {
    margin-top: 0;
}

footer p {
    margin: 0.3rem 0;
}