body {
    background-color: #003DA5;
    color: #fff;
    text-align: center;
    font-family: Arial, sans-serif;
    background-size: cover;
    background-position: center;
}

.start-screen {
    display: flex;
    flex-direction: column;
    justify-content: flex-end; /* bouton en bas */
    align-items: center;
    height: 100vh;
    padding-bottom: 80px; /* espace bas */
}

.logo img {
    max-width: 250px;
    margin-bottom: 20px;
}

h1 {
    margin: 10px 0 40px;
    font-size: 2.5rem;
}

.strategy {
    color: #51A3DB;
}

.buzzer {
    background-color: #1A2F44;
    padding: 5px 10px;
    border-radius: 5px;
}

.btn-login {
    background-color: #000;
    color: #fff;
    padding: 20px 60px;
    text-decoration: none;
    font-size: 1.8rem;
    font-weight: bold;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    transition: all 0.3s ease;
}

.btn-login:hover {
    background-color: #333;
}

@media (max-width: 1024px) {
    .logo img {
        max-width: 200px;
    }

    h1 {
        font-size: 2rem;
    }

    .btn-login {
        padding: 16px 50px;
        font-size: 1.6rem;
    }
}

@media (max-width: 768px) {
    .logo img {
        max-width: 150px;
    }

    h1 {
        font-size: 1.5rem;
    }

    .btn-login {
        padding: 12px 40px;
        font-size: 1.4rem;
    }
}

/* Page d'accueil : images selon la résolution */
@media (min-width: 1200px) {
    body.start-screen {
        background-image: url('/images/StrategyBuzzer paysage et ordi HD Connexion.png');
    }
}

@media (min-width: 768px) and (max-width: 1199px) {
    body.start-screen {
        background-image: url('/images/StrategyBuzzer tablette Connexion.png');
    }
}

@media (max-width: 767px) {
    body.start-screen {
        background-image: url('/images/StrategyBuzzer 1080x 1920 Connexion.png');
    }
}

/* Page menu uniquement */
body.menu-screen {
    background-image: url('/images/StrategyBuzzer paysage et ordi HD Menu.png');
}

.start-screen {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

.bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.btn-connexion {
    position: absolute;
    background: black;
    color: white;
    font-weight: bold;
    padding: 10px 20px;
    text-decoration: none;
    font-size: 1.2rem;
    z-index: 10;
}

/* Desktop / Paysage */
@media (min-width: 1025px) {
    .btn-connexion {
        top: 80%;
        left: 70%;
        transform: translate(-50%, -50%);
    }
}

/* Tablette */
@media (min-width: 768px) and (max-width: 1024px) {
    .btn-connexion {
        top: 85%;
        left: 60%;
        transform: translate(-50%, -50%);
    }
}

/* Mobile Portrait */
@media o(max-width: 767px) {
    .btn-connexion {
        top: 90%;
        left: 50%;
        transform: translate(-50%, -50%);