:root{--navy:#102a43;--blue:#1967d2;--bg:#f4f7fb;--line:#dde5ef;--muted:#66788a;--red:#c62828}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:#172b3a;font:14px Arial,"Noto Sans Thai",sans-serif;display:grid;grid-template-columns:230px 1fr;min-height:100vh}aside{background:var(--navy);color:white;padding:24px 16px;display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:10px;margin-bottom:35px}.brand b{background:#36a3ff;padding:9px;border-radius:9px}.brand span{font-size:17px;font-weight:bold}nav{display:grid;gap:8px}nav button{border:0;background:transparent;color:#bdd0df;text-align:left;padding:12px 14px;border-radius:9px;font-size:14px;cursor:pointer}nav button.active,nav button:hover{background:#1e4668;color:white}aside small{margin-top:auto;color:#82a4bc}main{padding:30px 36px;min-width:0}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:25px}h1{margin:0;font-size:27px}header p{color:var(--muted);margin:5px 0}.primary{background:var(--blue);color:white;border:0;padding:11px 17px;border-radius:9px;font-weight:bold;cursor:pointer}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.card,.panel{background:white;border:1px solid var(--line);border-radius:13px;padding:20px}.card span{color:var(--muted)}.card strong{display:block;font-size:27px;margin-top:12px}.panel{margin-top:18px;padding:0;overflow:auto}.panel h2{font-size:16px;padding:18px 20px;margin:0;border-bottom:1px solid var(--line)}table{border-collapse:collapse;width:100%;min-width:700px}th,td{text-align:left;padding:13px 16px;border-bottom:1px solid #edf1f5}th{background:#f8fafc;color:#526574;font-size:12px;text-transform:uppercase}.low{color:var(--red);font-weight:bold}.empty{text-align:center;padding:50px;color:var(--muted)}dialog{border:0;border-radius:15px;padding:0;width:min(620px,92vw);box-shadow:0 20px 70px #0004}dialog::backdrop{background:#102a4388}form{padding:22px}.dlghead{display:flex;justify-content:space-between}.dlghead h2{margin:0}.dlghead button{border:0;background:none;font-size:25px}.fields{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin:22px 0}.field{display:grid;gap:6px}.field.wide{grid-column:1/-1}input,select{padding:11px;border:1px solid #cdd8e3;border-radius:8px;background:white}.actions{display:flex;justify-content:flex-end;gap:10px}.actions>button:not(.primary){border:1px solid #ccd6e0;background:white;padding:10px 16px;border-radius:8px}@media(max-width:800px){body{grid-template-columns:1fr}aside{position:sticky;top:0;z-index:2;padding:10px 15px}.brand,aside small{display:none}nav{display:flex;overflow:auto}main{padding:20px 14px}.cards{grid-template-columns:1fr}.fields{grid-template-columns:1fr}}