:root{--bg:#f4f6fa;--card:#fff;--ink:#1c2430;--muted:#66717f;--line:#e3e8ef;--brand:#0f766e;--brand-2:#0e9f8a;--accent:#f59e0b;--danger:#dc2626;--ok:#16a34a;--chip:#eef2f7;--radius:12px;--shadow:0 1px 2px rgba(16,24,40,.06),0 1px 3px rgba(16,24,40,.08)}
*{box-sizing:border-box}html,body{margin:0;padding:0}
body{font-family:"Segoe UI","Noto Sans Thai","Sarabun",Tahoma,system-ui,sans-serif;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.55}
a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}
.topnav{display:flex;align-items:center;gap:18px;padding:0 20px;height:54px;background:#0b3d3a;color:#fff;position:sticky;top:0;z-index:20}
.topnav .brand{font-weight:700;font-size:16px;letter-spacing:.2px;color:#fff;display:flex;align-items:center;gap:8px}
.topnav .brand span{background:var(--accent);color:#1c1c1c;border-radius:6px;padding:0 6px;font-size:12px}
.topnav nav{display:flex;gap:4px;margin-left:8px}.topnav nav a{color:#cfe3e0;padding:8px 12px;border-radius:8px;font-weight:500}
.topnav nav a.active,.topnav nav a:hover{background:rgba(255,255,255,.12);color:#fff;text-decoration:none}
.topnav .right{margin-left:auto;display:flex;gap:10px;align-items:center;font-size:13px;color:#cfe3e0}
.container{max-width:1240px;margin:0 auto;padding:20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}
.card h2,.card h3{margin:0 0 10px}
.grid{display:grid;gap:16px}.grid.c2{grid-template-columns:1fr 1fr}.grid.c3{grid-template-columns:repeat(3,1fr)}.grid.c4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.grid.c2,.grid.c3,.grid.c4{grid-template-columns:1fr}}
.stat{padding:14px 16px}.stat .n{font-size:26px;font-weight:700;color:var(--brand)}.stat .l{color:var(--muted);font-size:13px}
button,.btn{font:inherit;border:1px solid var(--line);background:#fff;color:var(--ink);padding:8px 14px;border-radius:9px;cursor:pointer;transition:.15s}
button:hover,.btn:hover{border-color:#c8d1dc;background:#fafbfd}
button.primary,.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}button.primary:hover{background:var(--brand-2)}
button.danger{color:var(--danger);border-color:#f3c5c5}button.small,.btn.small{padding:4px 10px;font-size:13px}
button:disabled{opacity:.5;cursor:not-allowed}
input[type=text],input[type=password],select,textarea{font:inherit;border:1px solid var(--line);border-radius:9px;padding:8px 10px;background:#fff;color:var(--ink);width:100%}
textarea{resize:vertical}label{font-size:13px;color:var(--muted);display:block;margin-bottom:4px}
table{width:100%;border-collapse:collapse;font-size:13.5px}th,td{padding:7px 9px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{background:#f8fafc;font-weight:600;color:#334155;position:sticky;top:0}tr:hover td{background:#fbfcfe}td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.tablewrap{overflow:auto;max-height:520px;border:1px solid var(--line);border-radius:10px}
.badge{display:inline-block;padding:2px 8px;border-radius:999px;font-size:12px;background:var(--chip);color:#334155;white-space:nowrap}
.badge.ok{background:#dcfce7;color:#166534}.badge.err{background:#fee2e2;color:#991b1b}.badge.warn{background:#fef3c7;color:#92400e}.badge.brand{background:#ccfbf1;color:#115e59}
.muted{color:var(--muted)}.small{font-size:13px}.mono{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12.5px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.spacer{flex:1}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:14px}.tabs button{border:0;background:transparent;border-bottom:2px solid transparent;border-radius:0;padding:10px 14px;color:var(--muted)}
.tabs button.active{color:var(--brand);border-bottom-color:var(--brand);font-weight:600}
.progress{height:8px;background:#e6ebf2;border-radius:99px;overflow:hidden}.progress>i{display:block;height:100%;background:var(--brand-2);width:0;transition:width .2s}
.progress.indet>i{animation:ff-indet 1.3s ease-in-out infinite alternate;transition:none}@keyframes ff-indet{from{margin-left:0}to{margin-left:65%}}
.toast{position:fixed;right:18px;bottom:18px;background:#0b3d3a;color:#fff;padding:10px 14px;border-radius:10px;box-shadow:var(--shadow);z-index:50;opacity:0;transform:translateY(8px);transition:.2s}
.toast.show{opacity:1;transform:none}.toast.err{background:var(--danger)}
.modal-bg{position:fixed;inset:0;background:rgba(15,23,42,.45);display:none;align-items:center;justify-content:center;z-index:40;padding:20px}
.modal-bg.show{display:flex}.modal{background:#fff;border-radius:14px;max-width:1000px;width:100%;max-height:90vh;overflow:auto;padding:20px}
pre{background:#0f172a;color:#e2e8f0;padding:12px;border-radius:10px;overflow:auto;font-size:12.5px;white-space:pre-wrap}
code{background:#eef2f7;padding:1px 5px;border-radius:5px;font-size:.92em}pre code{background:none;padding:0}
.log{background:#0f172a;color:#cbd5e1;font-family:ui-monospace,monospace;font-size:12px;padding:10px;border-radius:10px;max-height:260px;overflow:auto;white-space:pre-wrap}
/* ---------- chat ---------- */
.chat-layout{display:grid;grid-template-columns:260px 1fr;height:calc(100vh - 54px)}
.sidebar{border-right:1px solid var(--line);background:#fff;display:flex;flex-direction:column;min-height:0}
.sidebar .head{padding:12px}.sidebar .list{overflow:auto;flex:1;padding:0 8px 12px}
.conv{padding:8px 10px;border-radius:9px;cursor:pointer;font-size:13.5px;display:flex;gap:6px;align-items:flex-start}
.conv:hover{background:#f1f5f9}.conv.active{background:#e0f2ef}.conv .t{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conv .x{opacity:0;color:var(--muted)}.conv:hover .x{opacity:1}
.chat-main{display:flex;flex-direction:column;min-height:0;min-width:0}
.chat-head{padding:10px 20px;border-bottom:1px solid var(--line);background:#fff;display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.messages{flex:1;overflow:auto;padding:20px;display:flex;flex-direction:column;gap:16px}
.msg{max-width:960px;width:100%;margin:0 auto}.msg.user .bubble{background:#0f766e;color:#fff;border-radius:16px 16px 4px 16px;padding:10px 14px;margin-left:auto;max-width:80%;width:fit-content;white-space:pre-wrap}
.msg.assistant .bubble{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 18px;box-shadow:var(--shadow)}
.msg .meta{font-size:12px;color:var(--muted);margin:4px 6px}
.route-card{background:#f0fdfa;border:1px solid #99f6e4;border-radius:10px;padding:8px 12px;margin-bottom:10px;font-size:13px}
.route-card b{color:#115e59}.route-card .sk{display:flex;gap:4px;flex-wrap:wrap;margin-top:4px}.route-card details{margin-top:6px}.route-card summary{cursor:pointer;color:var(--brand)}
.tools{display:flex;flex-direction:column;gap:4px;margin:6px 0 10px;font-size:12.5px}
.tool{display:flex;gap:8px;align-items:flex-start;background:#f8fafc;border:1px solid var(--line);border-radius:8px;padding:4px 8px;color:#475569}
.tool .ic{width:18px}.tool .r{margin-left:auto;color:var(--brand);white-space:nowrap}.tool.running{border-color:#99f6e4}
.content{font-size:15px}.content h1,.content h2,.content h3{margin:14px 0 6px;font-size:16px}.content h1{font-size:18px}.content p{margin:6px 0}
.content table{margin:8px 0;font-size:13.5px}.content th{position:static}.content ul,.content ol{padding-left:22px;margin:6px 0}.content li{margin:2px 0}
.content blockquote{border-left:3px solid #99f6e4;margin:6px 0;padding:2px 10px;color:#475569}
.sources{margin-top:10px;padding-top:8px;border-top:1px dashed var(--line);font-size:12.5px;color:var(--muted)}.sources a{margin-right:8px}
.fb{display:flex;gap:6px;align-items:center;margin-top:8px;font-size:12.5px;color:var(--muted)}.fb button{padding:2px 8px;font-size:13px}.fb button.on{background:#ccfbf1;border-color:#5eead4}
.composer{padding:12px 20px 16px;background:#fff;border-top:1px solid var(--line)}
.composer .box{max-width:960px;margin:0 auto;display:flex;gap:10px;align-items:flex-end}
.composer textarea{min-height:48px;max-height:180px;border-radius:14px;padding:12px 14px;font-size:15px}
.chips{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin:20px auto;max-width:900px}.chip{background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 14px;cursor:pointer;font-size:13.5px}
.chip:hover{border-color:var(--brand);color:var(--brand)}
.welcome{text-align:center;margin:40px auto 0;max-width:720px;color:var(--muted)}.welcome h1{color:var(--ink);font-size:24px;margin-bottom:6px}
.typing{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--brand);animation:blink 1s infinite}@keyframes blink{50%{opacity:.2}}
/* ---------- upload ---------- */
.dropzone{border:2px dashed #b6c2d0;border-radius:14px;padding:36px;text-align:center;background:#fff;cursor:pointer;transition:.15s}
.dropzone.over{border-color:var(--brand);background:#f0fdfa}.dropzone h3{margin:0 0 4px}
.filelist td select,.filelist td .ffsel{min-width:260px}
/* ---------- searchable select (FF.searchable) ---------- */
.ffsel{position:relative;display:inline-block;width:100%;vertical-align:middle}
.ffsel input[type=text]{padding-right:28px;cursor:pointer;text-overflow:ellipsis}.ffsel input[type=text]:focus{cursor:text;outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(15,118,110,.12)}
.ffsel .caret{position:absolute;right:10px;top:50%;transform:translateY(-50%);pointer-events:none;color:var(--muted);font-size:11px}
.ffsel-list{position:fixed;z-index:60;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 10px 28px rgba(16,24,40,.16);overflow:auto;padding:4px;font-size:14px;max-width:min(560px,calc(100vw - 16px));overscroll-behavior:contain}
.ffsel-list .opt{padding:6px 10px;border-radius:7px;cursor:pointer;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ffsel-list .opt.hi{background:#e0f2ef;color:#115e59}.ffsel-list .opt.sel{font-weight:600}.ffsel-list .opt.dis{opacity:.45;cursor:not-allowed}
.ffsel-list .grp{padding:8px 10px 2px;font-size:12px;color:var(--muted);font-weight:600}.ffsel-list .grp:first-child{padding-top:4px}
.ffsel-list .empty{padding:8px 10px;color:var(--muted);font-size:13px}
.ffsel-list mark{background:#fef3c7;color:inherit;padding:0;border-radius:2px}
@media(max-width:800px){.chat-layout{grid-template-columns:1fr}.sidebar{display:none}}