.simple .currency-symbol {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: #667eea;
    font-weight: bold;
    pointer-events: none;
    z-index: 1;
}

.simple .currency-input {
    padding-left: 40px !important;
}

.simple .percent-symbol {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: #667eea;
    font-weight: bold;
    pointer-events: none;
    z-index: 1;
}

.simple .percent-input {
    padding-right: 40px !important;
}

.simple .button-group {
    gap: 15px;
    margin: 30px 0;
}

.simple .btn-clear {
    background: #6c757d;
    color: white;
}

.simple .btn-clear:hover {
    background: #545b62;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(108, 117, 125, 0.4);
}

.simple .results {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-radius: 15px;
    padding: 30px;
    margin-top: 30px;
    border-left: 5px solid #667eea;
    display: none;
    animation: slideIn 0.5s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.simple .result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px solid #dee2e6;
}

.simple .result-item:last-child {
    border-bottom: none;
    font-size: 1.2em;
    font-weight: bold;
    color: #667eea;
}

.simple .result-label {
    color: #555;
    font-weight: 600;
}

.simple .result-value {
    font-weight: bold;
    color: #333;
    font-size: 1.1em;
}

.simple .formula-section {
    background: #e3f2fd;
    border-radius: 10px;
    padding: 20px;
    margin-top: 20px;
    border-left: 4px solid #2196f3;
}

.simple .formula {
    font-family: 'Courier New', monospace;
    font-size: 1.1em;
    font-weight: bold;
    color: #1976d2;
    text-align: center;
    margin-bottom: 10px;
}

.simple .formula-explanation {
    font-size: 0.9em;
    color: #555;
    text-align: center;
}

.simple .error {
    color: #dc3545;
    font-size: 0.9em;
    margin-top: 5px;
    display: none;
}

.simple .input-group.has-error input {
    border-color: #dc3545;
    background: #fff5f5;
}

.simple .input-group.has-error .error {
    display: block;
}

.simple .presets {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 10px;
    margin: 20px 0;
}

.simple .preset-btn {
    background: #e9ecef;
    border: 1px solid #ced4da;
    border-radius: 8px;
    padding: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    font-size: 0.9em;
}

.simple .preset-btn:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

.simple .preset-label {
    font-weight: bold;
    display: block;
}

.simple .preset-details {
    font-size: 0.8em;
    color: #666;
}