:root{--navy:#1B1C5E;--brand:#2D2E83;--sky:#29B6E8;--bg:#F5F7FB;--line:#E2E8F0;--muted:#64748B;--ink:#0F172A;--ok:#15803D;--warn:#B45309;--err:#B91C1C}
*{box-sizing:border-box}
body{margin:0;font-family:'IBM Plex Sans Thai','Sarabun',system-ui,sans-serif;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.5}
a{color:var(--brand)}
.layout{display:flex;min-height:100vh}
.side{width:230px;flex:0 0 230px;background:var(--navy);color:#fff;padding:18px 12px;position:sticky;top:0;height:100vh;overflow:auto}
.side .brand{display:flex;align-items:center;gap:10px;padding:4px 8px 18px;font-weight:700;font-size:18px}
.side .brand img{width:34px;height:34px;object-fit:contain;background:#fff;border-radius:8px;padding:2px}
.side .grp{font-size:12px;color:#8E96C8;margin:14px 10px 6px;letter-spacing:.04em}
.side a{display:block;color:#DCE3FA;text-decoration:none;padding:8px 10px;border-radius:8px;font-size:15px}
.side a:hover,.side a.on{background:#2A2C7A;color:#fff}
.side form button{background:none;border:0;color:#DCE3FA;padding:8px 10px;font:inherit;cursor:pointer}
.main{flex:1;min-width:0;padding:24px 28px 60px}
.top{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;margin-bottom:18px}
h1{font-size:24px;margin:0}
h2{font-size:18px;margin:0 0 12px}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px;margin-bottom:16px}
.grid{display:grid;gap:14px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}.g3{grid-template-columns:repeat(3,minmax(0,1fr))}.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:900px){.layout{display:block}.side{position:static;width:auto;height:auto}.g2,.g3,.g4{grid-template-columns:1fr}.main{padding:16px}}
label{display:block;font-size:13px;color:var(--muted);margin-bottom:4px}
input,select,textarea{font:inherit;width:100%;padding:8px 10px;border:1px solid #CBD5E1;border-radius:8px;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:2px solid #93C5FD;border-color:#60A5FA}
textarea{resize:vertical}
.btn{display:inline-flex;align-items:center;gap:6px;font:inherit;font-weight:600;padding:8px 16px;border-radius:8px;border:1px solid var(--brand);background:var(--brand);color:#fff;text-decoration:none;cursor:pointer;white-space:nowrap}
.btn.ghost{background:#fff;color:var(--brand)}
.btn.sm{padding:4px 10px;font-size:13px}
.btn.danger{background:#fff;color:var(--err);border-color:#FCA5A5}
.btn.sky{background:var(--sky);border-color:var(--sky);color:#0B1340}
.row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
table.list{width:100%;border-collapse:collapse;background:#fff}
table.list th,table.list td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
table.list th{font-size:13px;color:var(--muted);font-weight:600;background:#F8FAFC}
table.list tr:hover td{background:#F8FAFF}
.num{text-align:right !important;font-variant-numeric:tabular-nums}
.muted{color:var(--muted)}
.tag{display:inline-block;font-size:12px;padding:1px 8px;border-radius:999px;background:#EEF2FF;color:var(--brand)}
.tag.void{background:#FEE2E2;color:var(--err)}
.tag.sup{background:#ECFDF5;color:#047857}
.tag.per{background:#FEF3C7;color:#92400E}
.flash{padding:10px 14px;border-radius:8px;margin-bottom:12px;border:1px solid}
.flash.ok{background:#F0FDF4;border-color:#BBF7D0;color:var(--ok)}
.flash.warn{background:#FFFBEB;border-color:#FDE68A;color:var(--warn)}
.flash.error{background:#FEF2F2;border-color:#FECACA;color:var(--err)}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-bottom:16px}
.stat{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;text-decoration:none;color:inherit}
.stat b{display:block;font-size:26px;color:var(--brand)}
.stat span{font-size:13px;color:var(--muted)}
.lines th{font-size:13px;color:var(--muted);text-align:left;padding:6px 4px}
.lines td{padding:4px}
.lines input,.lines select{padding:6px 8px}
.totals{margin-left:auto;max-width:380px}
.totals div{display:flex;justify-content:space-between;padding:4px 0}
.totals .big{font-size:20px;font-weight:700;color:var(--brand);border-top:1px solid var(--line);padding-top:8px;margin-top:4px}
.search{display:flex;gap:8px}
.search input{width:240px}
.hint{font-size:13px;color:var(--muted);margin-top:4px}
.idcard{max-width:320px;border:1px solid var(--line);border-radius:8px}
.login{max-width:380px;margin:12vh auto;background:#fff;border:1px solid var(--line);border-radius:16px;padding:32px}
.whtgrid td{padding:4px 6px;border-bottom:1px solid var(--line);vertical-align:middle}
.whtgrid .lvl1{padding-left:18px}.whtgrid .lvl2{padding-left:34px}.whtgrid .lvl3{padding-left:52px}
.whtgrid input{padding:5px 8px}