* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 40px auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.calculator-section, .results-section {
    padding: 20px;
    margin-bottom: 20px;
}

h2 {
    margin-bottom: 20px;
    color: #2c3e50;
    font-size: 24px;
}

.time-selector {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.time-inputs {
    display: flex;
    align-items: center;
}

select {
    padding: 10px;
    margin: 0 5px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    background-color: #fff;
    cursor: pointer;
}

.calculate-btn {
    display: block;
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.calculate-btn:hover {
    background-color: #2980b9;
}

.info-text {
    margin-bottom: 15px;
    color: #7f8c8d;
    font-style: italic;
}

.results {
    margin-top: 20px;
}

.time-list {
    list-style-type: none;
    margin: 15px 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.time-list li {
    background-color: #3498db;
    color: white;
    padding: 10px 15px;
    margin: 5px;
    border-radius: 4px;
    font-size: 18px;
    font-weight: bold;
}

.cycle-info {
    margin-top: 20px;
    color: #7f8c8d;
    text-align: center;
    font-size: 14px;
}

.hidden {
    display: none;
}