:root {
    --primary-color: #4285f4;
    --secondary-color: #34a853;
    --accent-color: #ea4335;
    --text-color: #333;
    --light-gray: #f5f5f5;
    --dark-gray: #757575;
}

* {
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #171f2b;
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h1, h2 {
    color: var(--primary-color);
    margin-bottom: 20px;
    text-align: center;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

input[type="text"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

textarea {
    resize: vertical;
    min-height: 80px;
}

.radio-group {
    display: flex;
    gap: 15px;
    margin-top: 8px;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: 5px;
    font-weight: normal;
    cursor: pointer;
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 20px;
    font-size: 16px;
    border-radius: 4px;
    cursor: pointer;
    width: 100%;
    font-weight: 600;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #3367d6;
}

.loading {
    text-align: center;
    margin: 30px 0;
}

.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border-top: 4px solid var(--primary-color);
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.results {
    margin-top: 30px;
    padding: 20px;
    background-color: var(--light-gray);
    border-radius: 8px;
}

.hidden {
    display: none;
}

.error {
    color: var(--accent-color);
    font-weight: bold;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.feature-card {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-decoration: none;
    color: var(--text-color);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.feature-card h2 {
    color: var(--primary-color);
    margin-bottom: 10px;
    text-align: left;
}

.feature-card p {
    color: var(--dark-gray);
}

.back-button {
    display: inline-block;
    margin-bottom: 20px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
}

.back-button:hover {
    color: #3367d6;
}

@media (max-width: 600px) {
    .container {
        padding: 20px;
    }
    
    .radio-group {
        flex-direction: column;
        gap: 8px;
    }
}