* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Le fond global de l'écran devient sombre et sobre */
body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #0f172a; /* Fond sombre élégant */
    padding: 20px;
}

/* L'image de billets s'applique UNIQUEMENT à l'intérieur de la carte */
.app-frame {
    background: linear-gradient(rgba(255, 255, 255, 0.85), rgba(255, 255, 255, 0.85)), 
                url('../images/billets-mix.jpg') no-repeat center center/cover;
    width: 100%;
    max-width: 380px;
    border-radius: 30px;
    padding: 25px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
    border: 2px solid #334155;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-img {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #10b981;
    background-color: white;
}

.home-icon {
    width: 45px;
    height: 45px;
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 20px;
    border: 1px solid #cbd5e1;
}

.inner-card {
    background-color: rgba(255, 255, 255, 0.92);
    border: 2px solid #94a3b8;
    border-radius: 20px;
    padding: 30px 20px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 330px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.inner-card h2 {
    font-size: 1.4rem;
    color: #1e293b;
    font-weight: 700;
    margin-bottom: 25px;
    margin-top: 15px;
}

.inner-card p {
    color: #475569;
    font-size: 1.05rem;
    line-height: 1.5;
    margin-bottom: 45px;
}

.btn-ouvrir {
    background-color: #10b981;
    color: white;
    padding: 12px 40px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 25px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
}

.btn-ouvrir:hover {
    background-color: #059669;
    transform: translateY(-2px);
}