#cat-pregnancy-calculator {
max-width: 600px;
margin: 20px auto;
padding: 15px;
background: #fff;
border-radius: 5px;
box-shadow: 0 1px 3px rgba(0,0,0,0.1);
font-family: -apple-system, BlinkMacSystemFont, ‘Arial’, sans-serif;
color: #333;
box-sizing: border-box;
}
h2 {
text-align: center;
margin: 0 0 15px;
font-size: 1.4rem;
line-height: 1.2;
color: #333;
}
p {
text-align: center;
color: #666;
font-size: 14px;
margin-bottom: 15px;
}
.form-group {
margin-bottom: 15px;
position: relative;
}
label {
display: block;
margin-bottom: 5px;
font-size: 0.9rem;
font-weight: 600;
}
input[type=”date”], input[type=”number”], select {
width: 100%;
padding: 8px;
border: 1px solid #ddd;
border-radius: 3px;
font-size: 0.9rem;
box-sizing: border-box;
}
input:focus, select:focus {
border-color: #0073aa;
outline: none;
}
.tooltip {
position: relative;
display: inline-block;
margin-left: 5px;
}
.tooltip .tooltip-text {
visibility: hidden;
width: 180px;
background: #333;
color: #fff;
text-align: center;
border-radius: 3px;
padding: 5px;
position: absolute;
z-index: 10;
bottom: 125%;
left: 50%;
transform: translateX(-50%);
opacity: 0;
transition: opacity 0.3s;
font-size: 0.75rem;
}
.tooltip:hover .tooltip-text {
visibility: visible;
opacity: 1;
}
.button-group {
display: flex;
gap: 10px;
justify-content: center;
margin-top: 15px;
}
button {
padding: 8px 16px;
border: none;
border-radius: 3px;
cursor: pointer;
font-size: 0.9rem;
background: #0073aa;
color: #fff;
}
button:hover {
background: #005177;
}
#reset-btn {
background: #6c757d;
}
#reset-btn:hover {
background: #5a6268;
}
#copy-btn {
background: #28a745;
}
#copy-btn:hover {
background: #218838;
}
#result {
margin-top: 15px;
padding: 10px;
border-radius: 3px;
font-size: 0.9rem;
line-height: 1.4;
min-height: 20px;
}
#result.success {
background: #e6f4ea;
border: 1px solid #28a745;
}
#result.error {
background: #f8d7da;
border: 1px solid #dc3545;
}
.progress-bar {
width: 100%;
background: #f0f0f0;
border-radius: 3px;
height: 20px;
margin-top: 10px;
overflow: hidden;
}
.progress-bar-fill {
height: 100%;
background: #28a745;
transition: width 0.3s ease;
}
.timeline {
margin-top: 10px;
font-size: 0.85rem;
}
.timeline div {
margin: 5px 0;
}
noscript {
display: block;
color: #dc3545;
text-align: center;
margin-top: 10px;
font-size: 0.9rem;
}
@media (max-width: 600px) {
#cat-pregnancy-calculator {
margin: 10px;
padding: 10px;
}
h2 {
font-size: 1.2rem;
}
.button-group {
flex-direction: column;
}
button {
width: 100%;
}
}
`;
resultDiv.innerHTML = `
Estimated Due Date: ${formatDate(dueDate)}
Possible Delivery Range: ${formatDate(minDueDate)} to ${formatDate(maxDueDate)}
Current Stage: ${daysElapsed >= 0 ? trimester : ‘Pregnancy not yet started.’}
Progress:
Pregnancy Timeline: ${timeline}
Care Tips:
Enhanced Cat Pregnancy Calculator
Estimate your cat’s due date and track pregnancy stages.
Enter the mating date, then click “Calculate”.
JavaScript is disabled. Please enable it to use the calculator.
(function() {
if (!document.getElementById(‘cat-pregnancy-calculator’)) return;
const form = document.getElementById(‘calc-form’);
const matingDateInput = document.getElementById(‘mating-date’);
const gestationPeriodInput = document.getElementById(‘gestation-period’);
const resultDiv = document.getElementById(‘result’);
function formatDate(date) {
return date.toLocaleDateString(‘en-US’, {
weekday: ‘long’,
year: ‘numeric’,
month: ‘long’,
day: ‘numeric’
});
}
function calculate() {
resultDiv.className = ”;
resultDiv.innerHTML = ”;
try {
const matingDateStr = matingDateInput.value;
const gestationDays = parseInt(gestationPeriodInput.value);
if (!matingDateStr) {
throw new Error(‘Mating date is required.’);
}
if (isNaN(gestationDays) || gestationDays 71) {
throw new Error(‘Gestation period must be between 58 and 71 days.’);
}
const matingDate = new Date(matingDateStr);
if (isNaN(matingDate.getTime())) {
throw new Error(‘Invalid mating date.’);
}
const dueDate = new Date(matingDate);
dueDate.setDate(matingDate.getDate() + gestationDays);
const minDueDate = new Date(matingDate);
minDueDate.setDate(matingDate.getDate() + 58);
const maxDueDate = new Date(matingDate);
maxDueDate.setDate(matingDate.getDate() + 71);
const today = new Date();
const daysElapsed = Math.floor((today – matingDate) / (1000 * 60 * 60 * 24));
const progressPercent = Math.min((daysElapsed / gestationDays) * 100, 100);
const trimester = daysElapsed <= 20 ? 'First (Days 1–20): Nipple changes, subtle appetite increase.' :
daysElapsed <= 42 ? 'Second (Days 21–42): Larger belly, calmer behavior.' :
'Third (Days 42–63): Swollen belly, nesting behavior.';
const timeline = `
First Trimester (Days 1–20): Nipples may pinken around day 16–20.
Second Trimester (Days 21–42): Belly enlarges, cat becomes cuddlier.
Third Trimester (Days 42–63): Nesting, voracious appetite.
Possible Delivery Range: ${formatDate(minDueDate)} to ${formatDate(maxDueDate)}
Current Stage: ${daysElapsed >= 0 ? trimester : ‘Pregnancy not yet started.’}
Progress:
Pregnancy Timeline: ${timeline}
Care Tips:
- Feed a high-calorie diet (e.g., kitten food) in the third trimester.
- Provide a quiet nesting area with blankets by day 42.
- Avoid touching the belly to prevent harm.
- Consult a vet for ultrasound (day 25–35) to confirm pregnancy.