body {
    font-family: Arial, sans-serif;
    background-color: #1e1e1e;
    color: #ffffff;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.container {
    background-color: #2d2d2d;
    padding: 30px 40px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
    transition: background-color 0.1s ease, color 0.1s ease;
    width: 400px;
    max-width: 90%;
}

button, .btn-main {
    padding: 12px 24px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    margin: 15px 0;
    background-color: #e74c3c;
    color: white;
    border: none;
    border-radius: 6px;
    width: 100%;
}

button:active, .btn-main:active {
    background-color: #c0392b;
}

.flash-effect {
    background-color: #ffffff;
    color: #000000;
}

/* --------------------------------------
   ESTILOS DE TELAS E CHECKBOXES
--------------------------------------- */
.screen { display: none; }
.screen.active { display: block; animation: fadeIn 0.2s ease-in-out; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

.menu-grid {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 20px;
}

.btn-theme { background-color: #34495e; margin: 0; }
.btn-theme:hover { background-color: #2c3e50; }

.catalog-sections {
    text-align: left;
    margin: 20px 0;
}

.section-group h3 {
    font-size: 14px;
    color: #f1c40f;
    border-bottom: 1px solid #444;
    padding-bottom: 5px;
    margin-top: 20px;
}

.checkbox-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 10px;
}

/* Customização dos itens com checkbox */
.checkbox-item {
    display: flex;
    align-items: center;
    background-color: #3d3d3d;
    padding: 10px 15px;
    border-radius: 6px;
    cursor: pointer;
    user-select: none;
}

.checkbox-item input {
    margin-right: 15px;
    transform: scale(1.3);
    cursor: pointer;
}

.btn-confirm-load { background-color: #2ecc71; }
/* Estilo para quando o botão estiver bloqueado */
#btn-confirm-load:disabled {
    background-color: #555555; /* Cor cinza apagada */
    color: #888888;
    cursor: not-allowed; /* Muda o mouse para um símbolo de 'proibido' */
    transform: none; /* Tira o efeito de clique */
}
.btn-confirm-load:active { background-color: #27ae60; }

.btn-back { background-color: #7f8c8d; font-size: 14px; padding: 8px 16px; margin-top: 10px; }

#current-expansion-title {
    color: #f1c40f;
    font-size: 18px;
    margin-bottom: 20px;
    border-bottom: 1px solid #555;
    padding-bottom: 10px;
}