:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #2d333a;
    --text-secondary: #6e7781;
    --border-color: #d0d7de;
    --accent-color: #0969da;
    --hover-bg: #f3f4f6;
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --border-radius-large: 24px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    margin: 0;
    padding: 0;
}

/* Welcome Screen Styles */
.welcome-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    overflow: hidden; /* Prevent container scrolling */
}

.welcome-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    max-width: 768px;
    width: 100%;
    margin: 0 auto;
    padding: 0 2rem; /* Remove top/bottom padding */
    height: 100vh; /* Full viewport height */
    overflow: hidden; /* Prevent content scrolling */
}

/* Fixed header section for desktop */
.welcome-header {
    text-align: center;
    padding-top: 4rem;
    padding-bottom: 2rem;
    flex-shrink: 0; /* Prevent shrinking */
}

.welcome-title {
    font-size: 3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.welcome-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    font-weight: 400;
}

/* Search Container - Fixed position for desktop */
.search-container {
    position: relative; /* Changed from sticky */
    z-index: 100;
    background: var(--bg-primary);
    padding: 1rem 0 2rem 0;
    margin-bottom: 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    flex-shrink: 0; /* Prevent shrinking */
}

/* Scrollable content area */
.welcome-body {
    flex: 1;
    overflow-y: auto; /* Only this area scrolls */
    padding-bottom: 2rem;
    min-height: 0; /* Important for flex overflow */
}

.search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-primary);
    border: 1px solid #e1e5e9;
    border-radius: 50px; /* Капсульная форма */
    padding: 8px 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: all 0.2s ease;
    max-width: 100%;
    min-height: 56px; /* Увеличенная высота */
}

.search-input-wrapper:focus-within {
    border-color: #40a9a3;
    box-shadow: 0 2px 12px rgba(64, 169, 163, 0.15);
}


.search-input {
    flex: 1;
    border: none;
    background: none;
    padding: 0;
    font-size: 16px;
    color: var(--text-primary);
    outline: none;
    font-family: inherit;
    line-height: 1.5;
}

.search-input::placeholder {
    color: #9ca3af;
    font-weight: 400;
}

.voice-btn, .send-btn {
    background: none;
    border: none;
    padding: 0;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 50%;
    transition: all 0.2s ease;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.voice-btn:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}

.send-btn {
    background: #d1d5db; /* Серый цвет по умолчанию (неактивный) */
    color: white;
    margin-left: 8px;
    box-shadow: none;
    transition: all 0.3s ease;
    cursor: not-allowed;
}

.send-btn.active {
    background: #40a9a3; /* Зелено-голубой цвет когда активен */
    box-shadow: 0 2px 6px rgba(64, 169, 163, 0.3);
    cursor: pointer;
}

.send-btn.active:hover {
    background: #369691;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(64, 169, 163, 0.4);
}

.send-btn.loading {
    background: #374151; /* Черный цвет во время загрузки */
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Анимация спиннера */
.spinner {
    border: 2px solid transparent;
    border-top: 2px solid white;
    border-radius: 50%;
    width: 16px;
    height: 16px;
    animation: spin 1s linear infinite;
}

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

/* Example Prompts */
.example-prompts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.prompt-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
}

.prompt-card:hover {
    background: var(--hover-bg);
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.prompt-content {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.prompt-icon {
    background: var(--accent-color);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.prompt-text h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.prompt-text p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Chat Interface Styles */
.chat-container {
    height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    overflow: hidden;
}

.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-primary);
    position: sticky;
    top: 0;
    z-index: 100;
    flex-shrink: 0;
}

.new-chat-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: #e6f7f7; /* Голубоватый фон */
    border: 1px solid #40a9a3;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    color: var(--text-primary); /* Черный текст */
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.new-chat-btn:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}

.chat-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.info-btn {
    background: none;
    border: none;
    padding: 0.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 50%;
    transition: all 0.2s ease;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.info-btn:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}

/* Messages Container */
.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    min-height: 0; /* Important for flex overflow */
}

.messages-content {
    max-width: 768px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Message Styles */
.message {
    display: flex;
    gap: 1rem;
    animation: fadeIn 0.3s ease-out;
}

.message.user-message {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.9rem;
}

.bot-message .message-avatar {
    background: var(--accent-color);
    color: white;
}

.user-message .message-avatar {
    background: var(--text-primary);
    color: white;
}

.message-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem 1.25rem;
    max-width: 70%;
    line-height: 1.6;
}

.user-message .message-content {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.message-content p {
    margin: 0 0 0.5rem 0;
}

.message-content p:last-child {
    margin-bottom: 0;
}

/* Routing and Source Info */
.routing-info {
    background: rgba(9, 105, 218, 0.1);
    border: 1px solid rgba(9, 105, 218, 0.2);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    margin-top: 0.75rem;
    font-size: 0.85rem;
    color: var(--accent-color);
}

/* Sources Container */
.sources-container {
    margin-top: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-secondary);
}

.sources-header {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--text-primary);
    background: rgba(22, 163, 74, 0.05);
}

.sources-list {
    max-height: 400px;
    overflow-y: auto;
}

.source-item {
    border-bottom: 1px solid var(--border-color);
}

.source-item:last-child {
    border-bottom: none;
}

.source-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--bg-primary);
}

.source-header:hover {
    background: var(--hover-bg);
}

.source-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
}

.source-title i {
    color: var(--accent-color);
}

.source-table {
    background: var(--accent-color);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    margin-left: 0.5rem;
}

.source-score {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-right: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.source-score.high-score {
    color: #16a34a;
    font-weight: 600;
}

.source-score.medium-score {
    color: #ca8a04;
    font-weight: 500;
}

.source-score.low-score {
    color: var(--text-secondary);
}

.best-match {
    background: linear-gradient(to right, rgba(22, 163, 74, 0.05), transparent);
    border-left: 3px solid #16a34a;
}

.best-match-badge {
    background: #16a34a;
    color: white;
    padding: 0.2rem 0.5rem;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
    margin-left: 0.5rem;
    text-transform: uppercase;
}

.source-toggle {
    color: var(--text-secondary);
    transition: transform 0.2s ease;
}

.source-content {
    padding: 1rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.document-content {
    padding: 0.5rem;
}

.doc-details {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.classification-header {
    background: linear-gradient(135deg, rgba(9, 105, 218, 0.05), rgba(9, 105, 218, 0.02));
    padding: 0.75rem 1rem;
    border-radius: 8px;
    border-left: 4px solid var(--accent-color);
}

.classification-header h4 {
    margin: 0;
    color: var(--accent-color);
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.doc-section {
    background: var(--bg-primary);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.doc-section h5 {
    margin: 0 0 0.75rem 0;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.doc-section h5 i {
    color: var(--accent-color);
    font-size: 0.85rem;
}

.term-item {
    padding: 0.5rem 0;
    color: var(--text-primary);
    line-height: 1.5;
}

.term-item strong {
    color: var(--text-secondary);
    margin-right: 0.5rem;
}

.definition-text {
    background: rgba(9, 105, 218, 0.03);
    padding: 1rem;
    border-radius: 6px;
    line-height: 1.6;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    border-left: 3px solid rgba(9, 105, 218, 0.3);
}

.definition-text:last-child {
    margin-bottom: 0;
}

.definition-text.lang-ru {
    font-style: italic;
    background: rgba(22, 163, 74, 0.03);
    border-left-color: rgba(22, 163, 74, 0.3);
}

.examples-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.examples-list:last-child {
    margin-bottom: 0;
}

.example-tag {
    background: var(--accent-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 16px;
    font-size: 0.85rem;
    font-weight: 500;
    white-space: normal;
    word-wrap: break-word;
    display: inline-block;
    max-width: 100%;
}

.examples-list.lang-ru .example-tag {
    background: #16a34a;
}

.raw-content {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: 6px;
    line-height: 1.6;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* Custom scrollbar for sources */
.sources-list::-webkit-scrollbar {
    width: 6px;
}

.sources-list::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.sources-list::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.sources-list::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Chat Input Container */
.chat-input-container {
    padding: 1rem 2rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-primary);
    flex-shrink: 0; /* Prevent shrinking */
}

.chat-input-wrapper {
    max-width: 768px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    background: var(--bg-primary);
    border: 1px solid #e1e5e9;
    border-radius: 50px; /* Капсульная форма */
    padding: 8px 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: all 0.2s ease;
    min-height: 56px; /* Увеличенная высота */
}

.chat-input-wrapper:focus-within {
    border-color: #40a9a3;
    box-shadow: 0 2px 12px rgba(64, 169, 163, 0.15);
}


.chat-input {
    flex: 1;
    border: none;
    background: none;
    padding: 0;
    font-size: 16px;
    color: var(--text-primary);
    outline: none;
    font-family: inherit;
    resize: none;
    line-height: 1.5;
    min-height: 24px;
    max-height: 120px;
}

.chat-input::placeholder {
    color: #9ca3af;
    font-weight: 400;
}

.chat-send-btn {
    background: #d1d5db; /* Серый цвет по умолчанию (неактивный) */
    color: white;
    border: none;
    padding: 0;
    border-radius: 50%;
    cursor: not-allowed;
    transition: all 0.3s ease;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: 8px;
    flex-shrink: 0;
    box-shadow: none;
}

.chat-send-btn.active {
    background: #40a9a3; /* Зелено-голубой цвет когда активен */
    box-shadow: 0 2px 6px rgba(64, 169, 163, 0.3);
    cursor: pointer;
}

.chat-send-btn.active:hover {
    background: #369691;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(64, 169, 163, 0.4);
}

.chat-send-btn.loading {
    background: #374151; /* Черный цвет во время загрузки */
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Loading Indicator */
.loading-indicator {
    max-width: 768px;
    margin: 0.5rem auto 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Typing Dots Animation */
.typing-dots {
    display: flex;
    gap: 4px;
}

.typing-dots span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--text-secondary);
    animation: typing 1.4s infinite ease-in-out;
}

.typing-dots span:nth-child(1) { animation-delay: -0.32s; }
.typing-dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes typing {
    0%, 80%, 100% { 
        transform: scale(0.8); 
        opacity: 0.5; 
    }
    40% { 
        transform: scale(1); 
        opacity: 1; 
    }
}


/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Markdown Content Styling */
.markdown-content {
    line-height: 1.6;
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
}

.markdown-content h1 { font-size: 1.5rem; }
.markdown-content h2 { font-size: 1.3rem; }
.markdown-content h3 { font-size: 1.15rem; }
.markdown-content h4 { font-size: 1.05rem; }
.markdown-content h5 { font-size: 0.95rem; }
.markdown-content h6 { font-size: 0.9rem; }

.markdown-content h1:first-child,
.markdown-content h2:first-child,
.markdown-content h3:first-child {
    margin-top: 0;
}

.markdown-content p {
    margin-bottom: 0.75rem;
}

.markdown-content p:last-child {
    margin-bottom: 0;
}

.markdown-content ul,
.markdown-content ol {
    margin: 0.75rem 0;
    padding-left: 2rem;
}

.markdown-content li {
    margin-bottom: 0.25rem;
}

.markdown-content li:last-child {
    margin-bottom: 0;
}

.markdown-content strong {
    font-weight: 600;
    color: var(--text-primary);
}

.markdown-content em {
    font-style: italic;
}

.markdown-content code {
    background: rgba(9, 105, 218, 0.1);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
    color: var(--accent-color);
}

.markdown-content pre {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    margin: 0.75rem 0;
    overflow-x: auto;
}

.markdown-content pre code {
    background: none;
    padding: 0;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.markdown-content blockquote {
    border-left: 4px solid var(--accent-color);
    background: rgba(9, 105, 218, 0.05);
    padding: 0.75rem 1rem;
    margin: 0.75rem 0;
    border-radius: 0 8px 8px 0;
}

.markdown-content blockquote p:last-child {
    margin-bottom: 0;
}

.markdown-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 0.75rem 0;
    border-radius: 8px;
    overflow: hidden;
}

.markdown-content table th,
.markdown-content table td {
    padding: 0.75rem;
    text-align: left;
    border: 1px solid var(--border-color);
}

.markdown-content table th {
    background: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-primary);
}

.markdown-content table tr:nth-child(even) {
    background: rgba(0, 0, 0, 0.02);
}

.markdown-content hr {
    margin: 1.5rem 0;
    border: none;
    border-top: 2px solid var(--border-color);
}

.markdown-content a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
}

.markdown-content a:hover {
    text-decoration: underline;
}

/* Lists in bot messages */
.bot-message .markdown-content ul,
.bot-message .markdown-content ol {
    background: rgba(9, 105, 218, 0.03);
    border-radius: 8px;
    padding: 1rem 1rem 1rem 2.5rem;
    margin: 0.75rem 0;
}

.bot-message .markdown-content li {
    color: var(--text-primary);
    line-height: 1.6;
}

/* Numbered lists with custom styling */
.markdown-content ol {
    counter-reset: custom-counter;
    list-style: none;
    padding-left: 0;
}

.markdown-content ol li {
    counter-increment: custom-counter;
    position: relative;
    padding-left: 2.5rem;
}

.markdown-content ol li::before {
    content: counter(custom-counter);
    position: absolute;
    left: 0.5rem;
    top: 0;
    background: var(--accent-color);
    color: white;
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 600;
}

/* Classification Code Highlighting */
.classification-code {
    background: linear-gradient(135deg, rgba(9, 105, 218, 0.15), rgba(9, 105, 218, 0.1));
    color: var(--accent-color);
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
    font-weight: 600;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    display: inline-block;
    margin: 0 0.1rem;
    border: 1px solid rgba(9, 105, 218, 0.3);
    transition: all 0.2s ease;
}

.classification-code:hover {
    background: linear-gradient(135deg, rgba(9, 105, 218, 0.25), rgba(9, 105, 218, 0.2));
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(9, 105, 218, 0.2);
}

/* Utility Classes */
.d-none {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .welcome-title {
        font-size: 2.5rem;
    }
    
    .welcome-content {
        padding: 1rem;
    }
    
    .example-prompts {
        grid-template-columns: 1fr;
    }
    
    .chat-header,
    .chat-input-container {
        padding: 1rem;
    }
    
    /* Hide "Новый чат" text on mobile, keep only icon */
    .new-chat-btn span {
        display: none;
    }
    
    .new-chat-btn {
        padding: 0.5rem;
        min-width: auto;
    }
    
    /* Add spacing between new chat button and title on mobile */
    .chat-title {
        margin-left: 1rem;
    }
    
    .messages-container {
        padding: 1rem;
    }
    
    .message-content {
        max-width: 85%;
    }
    
    .search-input-wrapper,
    .chat-input-wrapper {
        margin: 0;
        width: 100%;
        max-width: none;
    }
    
    /* Mobile-specific chat layout */
    .chat-container {
        height: 100vh;
        display: flex;
        flex-direction: column;
    }
    
    .chat-header {
        flex-shrink: 0;
    }
    
    .messages-container {
        flex: 1;
        overflow-y: auto;
    }
    
    .chat-input-container {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border-top: 1px solid rgba(0, 0, 0, 0.06);
        padding: 16px;
        padding-bottom: calc(16px + env(safe-area-inset-bottom, 0px));
        z-index: 1000;
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
    }
    
    .messages-container {
        padding-bottom: 120px; /* Space for fixed input with new height */
    }
    
    /* Mobile welcome screen */
    .welcome-container {
        min-height: 100vh;
        display: flex;
        flex-direction: column;
    }
    
    .welcome-content {
        flex: 1;
        display: flex;
        flex-direction: column;
        padding: 1rem;
        padding-bottom: 120px; /* Space for fixed search bar */
    }
    
    .welcome-header {
        padding-top: 2rem;
        padding-bottom: 1rem;
    }
    
    .welcome-body {
        flex: 1;
        overflow-y: visible; /* Allow normal scrolling on mobile */
        padding-bottom: 0;
    }
    
    .search-container {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        top: auto; /* Override desktop sticky positioning */
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        padding: 16px;
        margin-bottom: 0;
        border-top: 1px solid rgba(0, 0, 0, 0.06);
        padding-bottom: calc(16px + env(safe-area-inset-bottom, 0px));
        z-index: 1000;
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
    }
    
    .example-prompts {
        margin-bottom: 20px; /* Reduced since welcome-content has padding-bottom */
    }
}

@media (max-width: 480px) {
    .welcome-title {
        font-size: 2rem;
    }
    
    .prompt-card {
        padding: 1rem;
    }
    
    .prompt-content {
        gap: 0.75rem;
    }
    
    .prompt-icon {
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }
    
    .search-container {
        padding: 0.75rem;
    }
    
    .chat-input-container {
        padding: 0.75rem;
    }
}

/* Compact Sources Design */
.sources-container.compact {
    margin-top: 1rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
}

.sources-toggle {
    cursor: pointer;
    user-select: none;
}

.sources-toggle-content {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.sources-toggle:hover .sources-toggle-content {
    color: var(--text-primary);
}

.sources-toggle .toggle-icon {
    margin-left: auto;
    transition: transform 0.3s ease;
}

.sources-toggle .toggle-icon.rotated {
    transform: rotate(180deg);
}

/* Sources Preview */
.sources-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.source-preview-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--bg-primary);
    padding: 0.4rem 0.75rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.8rem;
}

.source-preview-item:hover {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.source-preview-icon {
    font-size: 0.7rem;
}

.source-preview-icon.score-high { color: #16a34a; }
.source-preview-icon.score-medium { color: #ca8a04; }
.source-preview-icon.score-low { color: #dc2626; }

.source-preview-item:hover .source-preview-icon { color: white; }

.source-preview-title {
    font-weight: 500;
}

.source-preview-score {
    font-size: 0.75rem;
    opacity: 0.8;
}

.source-preview-more {
    display: flex;
    align-items: center;
    padding: 0.4rem 0.75rem;
    background: transparent;
    border: 1px dashed var(--border-color);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.source-preview-more:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* Full Sources List */
.sources-full-list {
    margin-top: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.source-compact-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.source-compact-item:hover {
    border-color: var(--accent-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.source-compact-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.source-compact-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
}

.source-number {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
}

.source-compact-title {
    font-weight: 500;
    color: var(--text-primary);
}

.source-compact-table {
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
}

.source-compact-score {
    font-weight: 600;
    font-size: 0.85rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.source-compact-score.score-high {
    background: rgba(22, 163, 74, 0.1);
    color: #16a34a;
}

.source-compact-score.score-medium {
    background: rgba(202, 138, 4, 0.1);
    color: #ca8a04;
}

.source-compact-score.score-low {
    background: rgba(220, 38, 38, 0.1);
    color: #dc2626;
}

/* Source Modal */
.source-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.source-modal.active {
    opacity: 1;
}

.source-modal-content {
    background: var(--bg-primary);
    border-radius: 16px;
    max-width: 800px;
    width: 90%;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.source-modal.active .source-modal-content {
    transform: scale(1);
}

.source-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.source-modal-header h3 {
    margin: 0;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.modal-close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.25rem;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.modal-close-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.source-modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;
}