#oinp-calculator-wrapper {
    max-width: 800px;
    margin: 0 auto;
    background: #f9f9f9;
    padding: 20px;
    border-radius: 8px;
    border: 1px solid #ddd;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

#oinp-form h3 {
    color: #2c3e50;
    margin-bottom: 20px;
}

#oinp-form h4 {
    background: #0073aa;
    color: white;
    padding: 10px;
    margin-top: 20px;
    border-radius: 4px;
}

.oinp-section label, 
.question-block label {
    display: block;
    margin-bottom: 8px;
    cursor: pointer;
    font-size: 15px;
}

.question-block {
    background: #fff;
    padding: 15px;
    margin-bottom: 15px;
    border-left: 4px solid #0073aa;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.question-block p {
    font-weight: 600;
    margin-top: 0;
    margin-bottom: 10px;
}

/* Helper Class for Logic */
.hidden {
    display: none !important;
}

#oinp-result {
    margin-top: 30px;
    padding: 20px;
    background: #e7f5fe;
    border: 2px solid #0073aa;
    text-align: center;
    border-radius: 8px;
}

#oinp-result h3 {
    margin: 0;
    font-size: 24px;
    color: #0073aa;
}

hr {
    margin: 20px 0;
    border: 0;
    border-top: 1px solid #ddd;
}

#reset-btn {
    background: #0073aa;
    color: #fff;
    border: none;
    padding: 10px 20px;
    font-size: 16px;
    border-radius: 4px;
    cursor: pointer;
    margin-top: 15px;
}

#reset-btn:hover {
    background: #005177;
}

.result-box {
    text-align: center;
    background: #eef7ff;
    border: 2px solid #0b5ed7;
    padding: 25px;
    border-radius: 10px;
    margin-top: 30px;
}

.score-title {
    font-size: 20px;
    color: #0b5ed7;
    margin-bottom: 10px;
}

.score-number {
    font-size: 36px;
    font-weight: bold;
    color: #000;
}

.pass-mark {
    margin-top: 10px;
    font-size: 14px;
    color: #555;
}