.step-content {
    display: none;
    animation: fadeIn 0.4s ease-out;
    min-height: 480px;
}

.step-content.active {
    display: block;
}

.simulator-box {
    background: var(--accent-yellow);
    padding: 25px;
    border-radius: 20px;
    text-align: center;
    border: 2px dashed var(--primary-green);
}

#decInput {
    padding: 12px;
    border: 3px solid var(--primary-green);
    border-radius: 12px;
    width: 200px;
    font-size: 1.5rem;
    text-align: center;
    margin-bottom: 20px;
    font-weight: bold;
    color: var(--primary-green);
}

.step-label {
    font-weight: 800;
    font-size: 0.85rem;
    color: var(--primary-green);
    margin: 15px 0 8px 0;
    text-align: left;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.bit-row {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 5px;
    margin-bottom: 15px;
}

.bit-box {
    width: 32px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    color: white;
    font-weight: bold;
    font-size: 1rem;
    background: var(--primary-green);
    font-family: 'Courier New', monospace;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 3px 0 rgba(0,0,0,0.1);
}

.bit-inverted { 
    background: var(--warning-orange); 
    transform: scale(1.05);
}

.bit-final { 
    background: #2d6a4f; 
    border: 2px solid var(--light-green);
    font-weight: 900;
}

.math-symbol {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--warning-orange);
    margin: 10px 0;
}

.divider-c2 {
    height: 3px;
    background: var(--text-dark);
    width: 90%;
    margin: 15px auto;
    border-radius: 5px;
}

.formula-container {
    text-align: center;
    margin: 25px 0;
    padding: 30px;
    background: var(--light-green);
    border-radius: 15px;
}

.formula-text {
    color: #d00000;
    font-size: 1.8rem;
    font-weight: bold;
}

.range-list li {
    padding: 10px;
    border-bottom: 1px solid var(--light-green);
    font-weight: 500;
}

.nav-buttons {
    margin-top: 40px;
    display: flex;
    justify-content: space-between;
}

.btn-prev, .btn-step {
    border: none;
    border-radius: 50px !important;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 12px 35px;
    transition: all 0.3s ease;
    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(.hidden) { background-color: #d35400 !important; transform: translateY(-3px); }

.btn-prev { background-color: var(--light-green) !important; color: var(--primary-green) !important; }
.btn-prev:hover:not(.hidden) { background-color: #b7e4c7 !important; transform: translateY(-3px); }

.hidden { visibility: hidden; opacity: 0; pointer-events: none; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}