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

:root {
    --primary-color: #10a37f;
    --bg-color: #343541;
    --chat-bg: #444654;
    --user-bg: #343541;
    --assistant-bg: #444654;
    --text-color: #ececf1;
    --border-color: #565869;
    --input-bg: #40414f;
    --hover-color: #2a2b32;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    padding: 20px;
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

header h1 {
    font-size: 28px;
    margin-bottom: 5px;
}

.subtitle {
    font-size: 14px;
    opacity: 0.9;
}

.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    scroll-behavior: smooth;
}

.welcome-message {
    max-width: 700px;
    margin: 50px auto;
    text-align: center;
}

.welcome-message h2 {
    font-size: 32px;
    margin-bottom: 15px;
}

.examples {
    background: var(--assistant-bg);
    border-radius: 12px;
    padding: 25px;
    margin-top: 30px;
    text-align: left;
}

.examples h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

.examples ul {
    list-style: none;
}

.examples li {
    padding: 10px;
    margin: 8px 0;
    background: var(--input-bg);
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
}

.examples li:hover {
    background: var(--hover-color);
}

.message {
    margin-bottom: 20px;
    animation: fadeIn 0.3s ease-in;
    display: flex;
    width: 100%;
}

.message.user {
    justify-content: flex-end;
}

.message.assistant {
    justify-content: flex-start;
}

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

.message-content {
    max-width: 70%;
    padding: 15px 20px;
    border-radius: 8px;
}

.message.user .message-content {
    background: var(--user-bg);
    border-left: 3px solid var(--primary-color);
    margin-left: auto;
}

.message.assistant .message-content {
    background: var(--assistant-bg);
    border-left: 3px solid #667eea;
    margin-right: auto;
}

.message-header {
    font-weight: 600;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.message.user .message-header {
    color: var(--primary-color);
}

.message.assistant .message-header {
    color: #667eea;
}

.sql-query {
    background: #2d2d2d;
    padding: 12px;
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
    margin: 10px 0;
    overflow-x: auto;
    border-left: 3px solid var(--primary-color);
}

.results-table {
    width: 100%;
    margin-top: 15px;
    border-collapse: collapse;
    background: var(--input-bg);
    border-radius: 8px;
    overflow: hidden;
}

.results-table th {
    background: #2a2b32;
    padding: 12px;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid var(--border-color);
}

.results-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border-color);
}

.results-table tr:last-child td {
    border-bottom: none;
}

.results-table tr:hover {
    background: var(--hover-color);
}

.no-results {
    padding: 20px;
    text-align: center;
    color: #999;
    font-style: italic;
}

.error-message {
    background: #ff4444;
    color: white;
    padding: 12px;
    border-radius: 6px;
    margin: 10px 0;
}

.loading {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #999;
}

.loading-dots {
    display: flex;
    gap: 4px;
}

.loading-dots span {
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out both;
}

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

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

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

.input-container {
    padding: 20px;
    background: var(--chat-bg);
    border-top: 1px solid var(--border-color);
    position: relative;
}

.autocomplete-suggestions {
    position: absolute;
    bottom: 100%;
    left: 20px;
    right: 20px;
    max-width: 800px;
    margin: 0 auto 10px;
    background: #2a2a2a;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    max-height: 250px;
    overflow-y: auto;
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

.suggestion-item {
    padding: 10px 15px;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    border-bottom: 1px solid #333;
    transition: background 0.15s;
}

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

.suggestion-item:hover,
.suggestion-item.selected {
    background: #3a3a3a;
}

.sug-icon {
    font-size: 16px;
}

.sug-label {
    color: #e0e0e0;
    font-size: 14px;
}

.input-wrapper {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    gap: 10px;
    background: var(--input-bg);
    border-radius: 12px;
    padding: 5px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

#queryInput {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-color);
    font-size: 16px;
    padding: 12px 15px;
    resize: none;
    outline: none;
    font-family: inherit;
    max-height: 200px;
}

#queryInput::placeholder {
    color: #8e8ea0;
}

.send-btn {
    background: var(--primary-color);
    border: none;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, transform 0.1s;
    align-self: flex-end;
}

.send-btn:hover {
    background: #0d8c6c;
}

.send-btn:active {
    transform: scale(0.95);
}

.send-btn:disabled {
    background: #565869;
    cursor: not-allowed;
}

.result-count {
    font-size: 13px;
    color: #8e8ea0;
    margin-top: 10px;
}

.feedback-buttons {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.feedback-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s;
    background: var(--input-bg);
    color: var(--text-color);
}

.feedback-btn:hover {
    background: var(--hover-color);
    transform: translateY(-1px);
}

.feedback-btn:disabled {
    cursor: not-allowed;
    transform: none;
}

.feedback-btn.helpful:hover {
    background: #10a37f;
}

.feedback-btn.not-helpful:hover {
    background: #d14343;
}

/* Scrollbar styling */
.chat-container::-webkit-scrollbar {
    width: 8px;
}

.chat-container::-webkit-scrollbar-track {
    background: var(--bg-color);
}

.chat-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.chat-container::-webkit-scrollbar-thumb:hover {
    background: #6e6e80;
}

/* Responsive design */
@media (max-width: 768px) {
    header h1 {
        font-size: 22px;
    }
    
    .chat-container {
        padding: 15px;
    }
    
    .message-content {
        padding: 12px 15px;
    }
    
    .input-container {
        padding: 15px;
    }
}