*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,sans-serif;background:#f7f8fa;color:#111}.app-root{display:flex;flex-direction:column;height:100vh}.top-bar{display:flex;justify-content:space-between;align-items:center;padding:14px 24px;background:#fff;border-bottom:1px solid #e5e7eb}.logo{font-size:18px;font-weight:600}.header-actions{display:flex;gap:10px}.icon-btn{border:none;background:#f1f5f9;padding:8px 10px;border-radius:10px;cursor:pointer}.chat-wrapper{flex:1;padding:24px;overflow-y:auto;max-width:900px;margin:0 auto;width:100%}.watermark{text-align:center;opacity:.4;margin-top:80px;font-size:18px}.chat-bubble{max-width:80%;padding:14px 16px;border-radius:14px;margin-bottom:18px;line-height:1.45;white-space:pre-wrap}.chat-bubble.user{margin-left:auto;background:#111827;color:#fff}.chat-bubble.assistant{margin-right:auto;background:#fff;border:1px solid #e5e7eb}.chat-text{margin-bottom:6px}.chat-eco{display:flex;gap:12px;font-size:12px;opacity:.7;padding-top:6px;border-top:1px dashed #e5e7eb;flex-wrap:wrap}.input-wrapper{display:flex;gap:12px;padding:16px;border-top:1px solid #e5e7eb;background:#fff}.input-wrapper input{flex:1;padding:14px;border-radius:10px;border:1px solid #d1d5db;font-size:16px}.input-wrapper button{padding:0 18px;font-size:18px;border-radius:10px;border:none;background:#10b981;color:#fff;cursor:pointer}.input-wrapper button:hover{background:#059669}.app-root.dark{background:#0f172a;color:#e5e7eb}.app-root.dark .top-bar,.app-root.dark .input-wrapper{background:#020617;border-color:#1f2937}.app-root.dark .chat-bubble.assistant{background:#111827;border-color:#1f2937}.app-root.dark input{background:#020617;color:#e5e7eb;border-color:#1f2937}.app-root.dark .chat-eco{border-color:#374151;color:#9ca3af}:root{--sidebar-bg: #171717;--sidebar-hover: #212121;--sidebar-border: #333;--text-sidebar-primary: #ECECF1;--text-sidebar-secondary: #9B9B9B;--accent-green: #10a37f;--accent-green-hover: #1a7f64;--user-avatar: #5436DA;--card-bg-dark: #202123;--card-bg-light: #ffffff}body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;overflow:hidden}.app-container{display:flex;height:100vh;width:100vw}.sidebar{width:320px;background-color:var(--sidebar-bg);color:var(--text-sidebar-primary);display:flex;flex-direction:column;padding:20px;border-right:1px solid var(--sidebar-border);flex-shrink:0;transition:margin-left .3s ease}.sidebar.closed{margin-left:-320px}.sidebar-header{margin-bottom:24px}.brand{font-size:1.4rem;font-weight:600;display:flex;gap:12px;align-items:center;color:#fff}.new-chat-btn{width:100%;border:1px solid rgba(255,255,255,.2);background:transparent;color:#fff;padding:14px;border-radius:8px;font-size:1rem;text-align:left;cursor:pointer;margin-top:15px;transition:background .2s}.new-chat-btn:hover{background:var(--sidebar-hover)}.eco-dashboard-card{background:#202123;padding:18px;border-radius:10px;margin-bottom:24px;border:1px solid #333}.eco-dashboard-card h3{margin:0 0 15px;font-size:.8rem;color:#888;letter-spacing:.05em;text-transform:uppercase}.metric-row{display:flex;justify-content:space-between;margin-bottom:10px;font-size:.95rem}.metric-row .label{color:var(--text-sidebar-secondary)}.metric-row .value{color:#fff;font-family:monospace}.metric-row .value.highlight{color:#4ade80;font-weight:700}.view-details-link{background:none;border:none;color:#888;font-size:.8rem;margin-top:12px;cursor:pointer;text-decoration:underline;padding:0;width:100%;text-align:left}.view-details-link:hover{color:#fff}.session-list{flex:1;overflow-y:auto;padding-right:5px}.session-item{padding:12px;border-radius:8px;cursor:pointer;margin-bottom:6px;color:var(--text-sidebar-primary);font-size:.95rem;position:relative}.session-item:hover{background-color:var(--sidebar-hover)}.session-item.active{background-color:#2a2b32}.session-title{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:500}.session-meta{display:flex;justify-content:space-between;font-size:.75rem;color:#666;margin-top:4px}.main-content{flex:1;display:flex;flex-direction:column;position:relative;height:100vh;overflow:hidden}.main-content.theme-dark{background-color:#343541;color:#ececf1;--bg-color: #343541;--msg-bg-assistant: #444654;--input-bg: #40414f;--input-text: white;--border-subtle: rgba(255,255,255,.1);--card-bg: #202123;--table-header-bg: rgba(255,255,255,.05)}.main-content.theme-light{background-color:#fff;color:#343541;--bg-color: #FFFFFF;--msg-bg-assistant: #F7F7F8;--input-bg: #FFFFFF;--input-text: #333;--border-subtle: #e5e5e5;--card-bg: #ffffff;--table-header-bg: #f9fafb}.top-nav{padding:15px 24px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border-subtle);flex-shrink:0;height:60px;box-sizing:border-box}.nav-left{display:flex;align-items:center;gap:15px}.nav-btn{background:none;border:none;font-size:1.4rem;cursor:pointer;color:inherit}.theme-toggle{background:transparent;border:1px solid var(--border-subtle);color:inherit;padding:6px 12px;border-radius:6px;cursor:pointer;font-size:.85rem}.chat-scroll-area{flex:1;overflow-y:auto;padding-bottom:180px;display:flex;flex-direction:column}.empty-state{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:inherit;opacity:.9}.empty-icon{font-size:4rem;margin-bottom:20px}.empty-state h1{font-size:2.5rem;font-weight:600;margin:0 0 10px}.empty-state p{font-size:1.1rem;opacity:.7;max-width:450px}.message-row{width:100%;border-bottom:1px solid var(--border-subtle);padding:30px 0;flex-shrink:0}.message-row.assistant{background-color:var(--msg-bg-assistant)}.message-center-wrapper{max-width:800px;margin:0 auto;display:flex;gap:24px;padding:0 20px}.role-icon{width:36px;height:36px;border-radius:4px;display:flex;align-items:center;justify-content:center;font-size:1.2rem;flex-shrink:0}.role-icon.user{background:var(--user-avatar);color:#fff}.role-icon.assistant{background:var(--accent-green);color:#fff}.message-content{flex:1;min-width:0}.role-name{font-weight:600;font-size:.9rem;margin-bottom:6px;opacity:.9}.text-body{line-height:1.7;font-size:1.05rem;white-space:pre-wrap}.eco-panel{margin-top:15px;display:inline-flex;flex-wrap:wrap;gap:10px}.eco-badge{font-size:.8rem;padding:4px 8px;border-radius:4px;background:#0000000d;border:1px solid var(--border-subtle);font-weight:500}.eco-badge.energy{color:#eab308}.eco-badge.water{color:#3b82f6}.eco-badge.carbon{color:#10b981}.input-area{position:absolute;bottom:0;left:0;right:0;background:linear-gradient(180deg,rgba(0,0,0,0) 0%,var(--bg-color) 40%);padding:40px 20px 30px;display:flex;flex-direction:column;align-items:center;z-index:10}.input-container{width:100%;max-width:850px;position:relative;background-color:var(--input-bg);border-radius:12px;box-shadow:0 0 15px #00000014;border:1px solid var(--border-subtle);display:flex;flex-direction:column}.input-container textarea{background:transparent;border:none;color:var(--input-text);font-family:inherit;font-size:1.1rem;padding:18px 50px 18px 20px;resize:none;min-height:30px;max-height:200px;outline:none;width:100%;box-sizing:border-box}.send-btn{position:absolute;right:12px;bottom:10px;background:var(--accent-green);border:none;border-radius:6px;width:36px;height:36px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:#fff}.disclaimer{font-size:.75rem;color:#999;margin-top:12px}.analytics-page{flex:1;padding:40px;overflow-y:auto;box-sizing:border-box;background-color:var(--bg-color);color:inherit}.analytics-header{margin-bottom:30px;display:flex;align-items:center;gap:20px}.back-btn{background:none;border:1px solid var(--border-subtle);color:inherit;padding:8px 16px;border-radius:6px;cursor:pointer}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin-bottom:40px}.stat-card{background:var(--card-bg);padding:20px;border-radius:10px;border:1px solid var(--border-subtle);box-shadow:0 2px 5px #0000000d}.stat-card h3{margin:0 0 10px;font-size:.85rem;opacity:.7;text-transform:uppercase}.stat-card .value{font-size:1.8rem;font-weight:600;font-family:monospace}.analytics-table-container{background:var(--card-bg);border-radius:8px;border:1px solid var(--border-subtle);overflow:hidden}.analytics-table{width:100%;border-collapse:collapse;text-align:left}.analytics-table th{padding:15px;font-weight:600;border-bottom:1px solid var(--border-subtle);background:var(--table-header-bg);color:inherit;font-size:.85rem;opacity:.8}.analytics-table td{padding:15px;border-bottom:1px solid var(--border-subtle);color:inherit;font-size:.95rem}.analytics-table tr:last-child td{border-bottom:none}