:root{--bg-color: #f4f6f8;--panel-bg: #ffffff;--text-primary: #111827;--text-secondary: #4b5563;--primary-color: #2563eb;--user-msg-bg: #e0e7ff;--ai-msg-bg: #f9fafb;--border-color: #e5e7eb;--table-header-bg: #f3f4f6;font-family:Inter,-apple-system,sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-primary);line-height:1.5;height:100vh}.app-container{display:flex;flex-direction:column;height:100vh;max-width:1200px;margin:0 auto}.app-header{padding:.75rem 2rem;background:linear-gradient(135deg,#0f172a,#1e293b);border-bottom:1px solid rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center}.header-brand{display:flex;align-items:center;gap:1rem}.app-logo{height:52px;width:auto;object-fit:contain}.header-divider{width:1px;height:28px;background-color:#ffffff40}.app-title{font-size:1.25rem;font-weight:600;color:#fff;letter-spacing:.04em;text-transform:uppercase}.app-header p{color:var(--text-secondary);font-size:.875rem}.app-main{flex:1;display:flex;flex-direction:column;overflow:hidden}.chat-container{flex:1;display:flex;flex-direction:column;background:var(--panel-bg);overflow:hidden}.chat-content{flex:1;overflow-y:auto;padding:2rem;display:flex;flex-direction:column;gap:1.5rem}.message-wrapper{display:flex;width:100%}.message-wrapper.user{justify-content:flex-end}.message-wrapper.ai{justify-content:flex-start}.message-content{max-width:85%;padding:1rem 1.5rem;border-radius:8px;border:1px solid var(--border-color);box-shadow:0 1px 2px #0000000d}.message-wrapper.user .message-content{background-color:var(--user-msg-bg);border-color:#c7d2fe}.message-wrapper.ai .message-content{background-color:var(--ai-msg-bg)}.message-wrapper.ai .message-content.error{border-left:3px solid #d97706;background-color:#fffbeb}.chat-input-wrapper{padding:1rem 2rem;background-color:var(--panel-bg);border-top:1px solid var(--border-color);display:flex;gap:1rem;align-items:center}.chat-textarea{flex:1;resize:none;padding:.75rem;border:1px solid var(--border-color);border-radius:6px;font-family:inherit;font-size:.95rem;outline:none}.chat-textarea:focus{border-color:var(--primary-color);box-shadow:0 0 0 2px #2563eb33}.send-button{padding:.75rem 1.5rem;background-color:var(--primary-color);color:#fff;border:none;border-radius:6px;cursor:pointer;font-weight:500;transition:background-color .2s}.send-button:hover:not(:disabled){background-color:#1d4ed8}.send-button:disabled{background-color:#9ca3af;cursor:not-allowed}.ai-response-container{display:flex;flex-direction:column;gap:1rem}.ai-explanation p{color:var(--text-primary);margin-bottom:.5rem}.sql-block-container{background:var(--panel-bg);border:1px solid var(--border-color);border-radius:6px;overflow:hidden}.sql-toggle-btn{width:100%;padding:.5rem 1rem;background:#f8fafc;border:none;border-bottom:1px solid var(--border-color);text-align:left;font-size:.85rem;font-weight:600;color:var(--text-secondary);cursor:pointer}.sql-code-block{padding:1rem;background:#1e293b;color:#f8fafc;font-family:monospace;font-size:.85rem;overflow-x:auto;margin:0}.table-container{overflow-x:auto;max-width:100%;border:1px solid var(--border-color);border-radius:6px}.data-table{width:100%;border-collapse:collapse;font-size:.875rem;text-align:left}.data-table th,.data-table td{padding:.75rem 1rem;border-bottom:1px solid var(--border-color)}.data-table th{background-color:var(--table-header-bg);font-weight:600;color:var(--text-secondary);white-space:nowrap}.data-table tbody tr:hover{background-color:#f8fafc}.empty-state{padding:1rem;text-align:center;color:var(--text-secondary);font-style:italic;background:#fef2f2;border:1px solid #fecaca;border-radius:6px}.execution-time{text-align:right;color:var(--text-secondary);margin-top:.5rem}.loading-spinner{display:inline-block;width:20px;height:20px;border:2px solid rgba(37,99,235,.3);border-radius:50%;border-top-color:var(--primary-color);animation:spin 1s ease-in-out infinite;margin-right:10px;vertical-align:middle}.loading-text{vertical-align:middle;color:var(--text-secondary);font-size:.9rem}@keyframes spin{to{transform:rotate(360deg)}}