body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
    padding: 20px;
    margin: 0;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h1, h2, h3 {
    color: #2c3e50;
    margin-bottom: 20px;
}

h1 {
    text-align: center;
    border-bottom: 2px solid #3498db;
    padding-bottom: 10px;
}

h2 {
    margin-top: 30px;
    border-bottom: 1px solid #eee;
    padding-bottom: 8px;
}

h3 {
    margin: 20px 0 10px;
    color: #3498db;
}

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

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #2c3e50;
}

textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
    font-size: 16px;
    min-height: 150px;
    resize: vertical;
}

textarea:focus {
    border-color: #3498db;
    outline: none;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.btn {
    display: inline-block;
    background: #3498db;
    color: white;
    padding: 12px 25px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: background 0.3s;
}

.btn:hover {
    background: #2980b9;
}

.alert {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 4px;
}

.alert.error {
    background-color: #f8d7da;
    color: #721c24;
    border-left: 4px solid #f5c6cb;
}

.results {
    margin-top: 30px;
    padding: 20px;
    background: #f9f9f9;
    border-radius: 6px;
    border-left: 4px solid #3498db;
}

.result-section {
    margin-bottom: 20px;
    padding: 15px;
    background: white;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.result-section p, .result-section ul {
    margin: 10px 0;
}

.result-section ul {
    list-style-type: none;
    padding-left: 0;
}

.result-section li {
    padding: 5px 0;
    border-bottom: 1px solid #eee;
}

.result-section li:last-child {
    border-bottom: none;
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    h1 {
        font-size: 24px;
    }
}