:root {
    --primary-color: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --text-color: #333;
    --bg-color: #f9fafb;
    --card-color: #ffffff;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

h1 {
    font-size: 2.5rem;
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 1.5rem;
}

.search-container {
    display: flex;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    border-radius: var(--border-radius);
    background-color: var(--card-color);
    overflow: hidden;
}

#search-input {
    flex: 1;
    padding: 1rem;
    border: none;
    font-size: 1rem;
    outline: none;
}

#search-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

#search-button:hover {
    background-color: var(--primary-dark);
}

.results-container {
    background-color: var(--card-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    margin-top: 1rem;
    min-height: 200px;
}

.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 0;
    color: var(--primary-color);
}

.brain {
    width: 100px;
    height: 100px;
    margin-bottom: 1rem;
    color: var(--primary-light);
}

.hidden {
    display: none;
}

#results h2 {
    color: var(--primary-dark);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-light);
}

#result-content {
    margin-bottom: 2rem;
    line-height: 1.8;
}

.sources h3 {
    color: var(--primary-dark);
    margin-bottom: 1rem;
}

#sources-list {
    list-style-type: none;
}

#sources-list li {
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
}

#sources-list li::before {
    content: "•";
    color: var(--primary-light);
    font-size: 1.5rem;
    position: absolute;
    left: 0;
    top: -0.25rem;
}

#sources-list a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

#sources-list a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Responsive styles */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .search-container {
        flex-direction: column;
    }
    
    #search-button {
        padding: 0.75rem;
    }
    
    .results-container {
        padding: 1.5rem;
    }
}