/* Basic CSS Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* General Styles */
body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    color: #333;
    background-color: #f5f5f5;
}

header {
    background-color: #2c3e50;
    color: white;
    padding: 1rem;
}

nav ul {
    display: flex;
    list-style: none;
    padding: 0;
    margin: 0;
}

nav ul li {
    margin-right: 1rem;
}

nav ul li a {
    color: white;
    text-decoration: none;
    padding: 0.5rem;
}

nav ul li a.active {
    border-bottom: 2px solid white;
}

nav ul li a:hover {
    color: #ecf0f1;
}

main {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

section {
    margin-bottom: 20px;
}

h1 {
    color: white;
    margin-bottom: 15px;
}

h2 {
    color: #2c3e50;
    margin-bottom: 10px;
}

footer {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
}

/* Calculator Specific Styles */
.calculator-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 30px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.calculator-container h2 {
    color: #2c3e50;
    margin-top: 0;
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
}

.calculator-container h3 {
    color: #27ae60;
    margin-top: 25px;
    margin-bottom: 15px;
    border-bottom: 1px solid #eee;
    padding-bottom: 8px;
}

.form-section {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

.form-group input, .form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    box-sizing: border-box;
    transition: border-color 0.3s;
}

.form-group input:focus, .form-group select:focus {
    border-color: #27ae60;
    outline: none;
    box-shadow: 0 0 0 2px rgba(39, 174, 96, 0.2);
}

.form-group button {
    background-color: #27ae60;
    color: white;
    padding: 12px 24px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: bold;
    font-size: 16px;
    display: block;
    width: 100%;
    max-width: 300px;
    margin: 30px auto;
}

.form-group button:hover {
    background-color: #2ecc71;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

#results {
    margin-top: 30px;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

#results h3 {
    color: #2c3e50;
    margin-top: 0;
}

#results table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

#results th {
    background-color: #27ae60;
    color: white;
    padding: 12px;
    text-align: left;
}

#results td {
    padding: 12px;
    border-bottom: 1px solid #ddd;
}

#results pre {
    background-color: #f5f5f5;
    padding: 15px;
    border-radius: 4px;
    overflow: auto;
    max-height: 300px;
    font-family: monospace;
    font-size: 14px;
}

.hidden {
    display: none;
}

.loading {
    text-align: center;
    padding: 1rem;
    font-size: 1.1rem;
}

.loading p {
    display: inline-block;
    padding: 10px 20px;
    background-color: #f8f9fa;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.error {
    color: #e74c3c;
    padding: 1rem;
    background-color: #fadbd8;
    border-radius: 4px;
    margin-top: 1rem;
    font-weight: bold;
}