:root{--navy:#102a43;--blue:#1769aa;--gold:#c59b45;--cream:#f7f3ea;--white:#fff;--text:#243b53;--muted:#627d98;--danger:#b42318;--line:#d9e2ec}*{box-sizing:border-box}body{margin:0;font-family:"Noto Sans Thai",Tahoma,Arial,sans-serif;background:#f5f7fa;color:var(--text)}a{color:var(--blue);text-decoration:none}.topbar{background:var(--navy);color:#fff;padding:14px 5%;display:flex;align-items:center;justify-content:space-between;box-shadow:0 2px 12px #0002}.brand{font-weight:800;letter-spacing:.4px}.brand small{display:block;font-weight:400;color:#bcccdc}.container{width:min(1120px,92%);margin:28px auto}.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:0 8px 28px #102a430d}.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:18px}.col-4{grid-column:span 4}.col-6{grid-column:span 6}.col-8{grid-column:span 8}.col-12{grid-column:span 12}h1,h2,h3{color:var(--navy);margin-top:0}.btn,button{border:0;border-radius:9px;padding:10px 16px;background:var(--blue);color:#fff;font-weight:700;cursor:pointer}.btn.secondary{background:#526d82}.btn.danger{background:var(--danger)}input,textarea,select{width:100%;border:1px solid #bcccdc;border-radius:9px;padding:10px 12px;font:inherit;background:#fff}textarea{min-height:130px;resize:vertical}label{display:block;font-weight:700;margin-bottom:6px}.field{margin-bottom:15px}.muted{color:var(--muted)}.alert{padding:12px 15px;border-radius:10px;margin-bottom:16px;background:#e6f4ea;color:#176b35}.alert.error{background:#fdecec;color:var(--danger)}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:11px;border-bottom:1px solid var(--line);vertical-align:top}th{color:var(--navy);font-size:.9rem}.badge{display:inline-block;padding:4px 8px;border-radius:99px;background:#e8f1f8;font-size:.78rem}.navlinks{display:flex;gap:16px;align-items:center}.navlinks a{color:#fff}.hero{padding:54px 5%;background:linear-gradient(135deg,#102a43,#1769aa);color:#fff}.hero h1{color:#fff;font-size:clamp(2rem,5vw,3.5rem);margin-bottom:8px}.chat-shell{width:min(820px,94%);margin:-28px auto 40px}.chat-messages{height:450px;overflow:auto;padding:18px;background:#f8fafc;border-radius:12px}.message{max-width:82%;margin:10px 0;padding:12px 15px;border-radius:14px;line-height:1.55;white-space:pre-wrap}.message.user{margin-left:auto;background:var(--blue);color:#fff;border-bottom-right-radius:4px}.message.bot{background:#fff;border:1px solid var(--line);border-bottom-left-radius:4px}.message img{max-width:100%;border-radius:10px;margin-top:10px}.chat-form{display:flex;gap:10px;margin-top:14px}.chat-form input{flex:1}.stats{font-size:2rem;font-weight:800;color:var(--blue)}.actions{display:flex;gap:8px;flex-wrap:wrap}.thumb{width:86px;height:64px;object-fit:cover;border-radius:8px}.login-card{width:min(440px,92%);margin:70px auto}.article-content{white-space:pre-wrap}@media(max-width:760px){.col-4,.col-6,.col-8{grid-column:span 12}.navlinks{gap:9px;font-size:.85rem}.chat-messages{height:390px}.hero{padding-top:36px}.table-wrap{overflow-x:auto}}