.sim-viewport { 
    position: relative; 
    width: 100%; 
    height: 700px; 
    background-color: #fff; 
    border-radius: 25px;
    border: 2px solid var(--light-green);
    overflow: hidden;
    box-shadow: inset 0 0 30px rgba(0,0,0,0.05);
}

#img-fundo { width: 100%; height: 100%; object-fit: contain; }

.static-bloco {
    position: absolute;
    padding: 12px 20px;
    background: var(--primary-green);
    color: white;
    font-weight: 800;
    border-radius: 10px;
    font-size: 1.1rem;
    z-index: 50;
    box-shadow: 4px 4px 0px rgba(0,0,0,0.1);
}

.floating-card { 
    position: absolute; 
    padding: 15px 25px; 
    color: white; 
    font-weight: 900; 
    border-radius: 12px; 
    z-index: 100; 
    font-size: 1.2rem;
    box-shadow: 0 10px 25px rgba(0,0,0,0.3); 
}

.cache-byte-card {
    position: absolute;
    width: 65px; 
    height: 75px; 
    background: var(--warning-orange);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 0.9rem;
    border-radius: 6px;
    opacity: 0;
    z-index: 60;
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    border: 2px solid rgba(255,255,255,0.3);
}

.nav.btn-step, .nav.btn-restart {
    border: none;
    border-radius: 50px !important;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 15px 40px;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.btn-step { background-color: var(--warning-orange) !important; color: white !important; }
.btn-step:hover:not(:disabled) { background-color: #d35400 !important; transform: translateY(-3px); }

.btn-restart { background-color: var(--light-green) !important; color: var(--primary-green) !important; }
.btn-restart:hover { background-color: #b7e4c7 !important; transform: translateY(-3px); }

button:disabled { background-color: #e0e0e0 !important; color: #a0a0a0 !important; cursor: not-allowed; opacity: 0.7; }