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

/* Body */
body {
    background: #f5f7fb;
    color: #333;
    padding: 40px;
}

/* Container */
.container {
    max-width: 800px;
    margin: auto;
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

/* Main heading at top, centered */
.main-heading {
    text-align: center;
    font-size: 2.5rem;      
    color: #4a90e2;        
    margin-bottom: 30px;   
    font-weight: bold;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}

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

/* Forms */
form {
    margin-bottom: 25px;
}

/* Inputs */
input[type="text"],
textarea {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    transition: 0.2s;
}

/* Input focus */
input:focus,
textarea:focus {
    border-color: #4a90e2;
    outline: none;
}

/* Button */
button {
    background: #4a90e2;
    color: white;
    border: none;
    padding: 10px 18px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: 0.3s;
}

/* Button hover */
button:hover {
    background: #357abd;
}

/* Output text */
#answer, #summary {
    margin-top: 10px;
    padding: 12px;
    background: #f0f4ff;
    border-left: 4px solid #4a90e2;
    border-radius: 6px;
    min-height: 30px;
}

/* Divider */
hr {
    margin: 30px 0;
    border: none;
    border-top: 1px solid #eee;
}