:root{--bg: #f6f7f9;--surface: #ffffff;--border: #e3e6ea;--text: #16181d;--muted: #6b7280;--primary: #06c755;--primary-dark: #05a647;--danger: #e03131;--warn: #f08c00;--info: #1971c2;--radius: 10px;--shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .04);color-scheme:light;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Noto Sans Thai,Sarabun,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-size:14px;line-height:1.55}a{color:var(--info)}.app{display:grid;grid-template-columns:220px 1fr;min-height:100vh}.sidebar{background:var(--surface);border-right:1px solid var(--border);padding:20px 14px;display:flex;flex-direction:column;gap:4px;position:sticky;top:0;height:100vh;overflow-y:auto}.sidebar .brand{font-weight:700;font-size:15px;padding:0 10px 16px;color:var(--text)}.sidebar .brand small{display:block;font-weight:400;color:var(--muted);font-size:12px}.nav-item{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:9px 10px;border-radius:8px;text-decoration:none;color:var(--text);font-size:14px}.nav-item:hover{background:#f1f3f5}.nav-item.active{background:#e7f9ee;color:var(--primary-dark);font-weight:600}.nav-item .badge{background:var(--danger);color:#fff;border-radius:999px;padding:1px 7px;font-size:11px;font-weight:700}.sidebar-footer{margin-top:auto;padding-top:16px;border-top:1px solid var(--border);font-size:12px;color:var(--muted)}.main{padding:24px 28px 60px;max-width:1280px;width:100%}.page-head{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:18px}.page-head h1{font-size:20px;margin:0}.page-head p{margin:2px 0 0;color:var(--muted);font-size:13px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}.card+.card{margin-top:14px}.card h2{margin:0 0 12px;font-size:15px}.grid{display:grid;gap:14px}.grid.cols-4{grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}.grid.cols-2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}.stat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}.stat .label{color:var(--muted);font-size:12px}.stat .value{font-size:26px;font-weight:700;margin-top:4px}.stat .value.alert{color:var(--danger)}table{width:100%;border-collapse:collapse;font-size:13px}th{text-align:left;color:var(--muted);font-weight:600;font-size:12px;padding:8px 10px;border-bottom:1px solid var(--border);white-space:nowrap}td{padding:10px;border-bottom:1px solid #f1f3f5;vertical-align:top}tbody tr:hover{background:#fafbfc}.tag{display:inline-block;padding:2px 8px;border-radius:999px;font-size:11px;font-weight:600;white-space:nowrap}.tag.ok{background:#e7f9ee;color:#087f5b}.tag.warn{background:#fff4e0;color:#b35309}.tag.danger{background:#ffe9e9;color:#c92a2a}.tag.info{background:#e7f1ff;color:#1864ab}.tag.muted{background:#f1f3f5;color:#6b7280}button,.btn{font:inherit;border:1px solid var(--border);background:var(--surface);color:var(--text);padding:7px 13px;border-radius:8px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:6px}button:hover:not(:disabled),.btn:hover{background:#f8f9fa}button:disabled{opacity:.55;cursor:not-allowed}button.primary{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:600}button.primary:hover:not(:disabled){background:var(--primary-dark)}button.danger{background:var(--danger);border-color:var(--danger);color:#fff}button.small{padding:4px 9px;font-size:12px}input,select,textarea{font:inherit;padding:8px 10px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);width:100%}input:focus,select:focus,textarea:focus{outline:2px solid #b2f2bb;outline-offset:-1px;border-color:var(--primary)}textarea{resize:vertical;min-height:72px}label{display:block;font-size:12px;color:var(--muted);margin-bottom:4px;font-weight:600}.field{margin-bottom:12px}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.toolbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}.toolbar button.active{background:var(--text);border-color:var(--text);color:#fff}.muted{color:var(--muted)}.small{font-size:12px}.mono{font-family:ui-monospace,SF Mono,Menlo,Consolas,monospace;font-size:12px}.empty{text-align:center;padding:40px 20px;color:var(--muted)}.alert{padding:10px 13px;border-radius:8px;font-size:13px;margin-bottom:12px}.alert.error{background:#ffe9e9;color:#c92a2a}.alert.success{background:#e7f9ee;color:#087f5b}.alert.info{background:#e7f1ff;color:#1864ab}.login-wrap{min-height:100vh;display:grid;place-items:center;padding:20px}.login-card{width:100%;max-width:360px}.chat-layout{display:grid;grid-template-columns:300px 1fr;gap:14px;height:calc(100vh - 150px);min-height:420px}.chat-list{overflow-y:auto;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}.chat-list-item{padding:11px 13px;border-bottom:1px solid #f1f3f5;cursor:pointer}.chat-list-item:hover{background:#fafbfc}.chat-list-item.active{background:#e7f9ee}.chat-panel{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.chat-header{padding:11px 14px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}.chat-messages{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:8px;background:#fbfcfd}.bubble{max-width:72%;padding:8px 12px;border-radius:12px;font-size:13px;white-space:pre-wrap;word-break:break-word}.bubble.user{align-self:flex-start;background:#fff;border:1px solid var(--border)}.bubble.assistant{align-self:flex-end;background:#d3f9d8}.bubble.admin{align-self:flex-end;background:#d0ebff}.bubble.system{align-self:center;background:#f1f3f5;color:var(--muted);font-size:11px;max-width:88%;text-align:center}.bubble .meta{font-size:10px;color:var(--muted);margin-top:3px}.chat-compose{border-top:1px solid var(--border);padding:10px;display:flex;gap:8px}.chat-compose textarea{min-height:42px;max-height:120px}.timeline{list-style:none;padding:0;margin:0}.timeline li{padding:8px 0 8px 18px;border-left:2px solid var(--border);position:relative;font-size:13px}.timeline li:before{content:"";position:absolute;left:-5px;top:14px;width:8px;height:8px;border-radius:50%;background:var(--border)}.timeline li:first-child:before{background:var(--primary)}@media(max-width:860px){.app{grid-template-columns:1fr}.sidebar{position:static;height:auto;flex-direction:row;flex-wrap:wrap;border-right:none;border-bottom:1px solid var(--border)}.sidebar .brand,.sidebar-footer{width:100%}.main{padding:16px}.chat-layout{grid-template-columns:1fr;height:auto}.chat-list{max-height:220px}.chat-panel{height:70vh}}