:root{
  --bg:#f5f7fb; --panel:#fff; --ink:#0f172a; --muted:#64748b; --line:#e2e8f0;
  --brand:#2563eb; --ok:#16a34a; --bad:#dc2626; --warn:#f59e0b; --sidebar:#0f172a;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:system-ui,-apple-system,"Segoe UI","Noto Sans Thai","Sarabun",sans-serif;font-size:15px;line-height:1.5}
a{color:var(--brand);text-decoration:none}
h1{font-size:22px;margin:0 0 14px}
h2{font-size:17px;margin:0 0 10px}
.muted{color:var(--muted)} .small{font-size:12.5px}
#app{display:flex;min-height:100vh}

/* sidebar */
.sidebar{width:236px;flex:0 0 236px;background:var(--sidebar);color:#e2e8f0;display:flex;flex-direction:column;padding:16px 12px}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:16px;margin-bottom:16px;color:#fff}
.brand.big{font-size:20px;margin-bottom:8px}
.dot{width:10px;height:10px;border-radius:50%;background:#22d3ee;display:inline-block}
.sidebar nav{display:flex;flex-direction:column;gap:2px;flex:1}
.sidebar nav a{color:#cbd5e1;padding:8px 10px;border-radius:8px;font-size:14.5px}
.sidebar nav a:hover{background:#1e293b;color:#fff}
.sidebar nav a.active{background:#1d4ed8;color:#fff;font-weight:600}
.nav-group{color:#64748b;font-size:11.5px;text-transform:uppercase;letter-spacing:.06em;margin:12px 10px 4px}
.sidebar-foot{border-top:1px solid #1e293b;padding-top:12px;margin-top:10px}
.sidebar-foot .who{font-weight:600;color:#fff}
.sidebar-foot .muted{color:#94a3b8}

/* main */
main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{background:#fff;border-bottom:1px solid var(--line);padding:10px 16px;display:flex;flex-wrap:wrap;
  align-items:flex-end;gap:10px;position:sticky;top:0;z-index:5}
.selector{display:flex;flex-wrap:wrap;gap:10px}
.selector label{display:flex;flex-direction:column;font-size:11.5px;color:var(--muted);gap:2px}
select,input[type=text],input[type=email],input[type=password]{padding:7px 9px;border:1px solid var(--line);
  border-radius:8px;background:#fff;font:inherit;min-width:150px;max-width:260px}
.range{margin-left:auto;align-self:center;font-size:12.5px}
.content{padding:18px;max-width:1500px;width:100%}

/* cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(165px,1fr));gap:12px;margin-bottom:16px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:13px 14px;box-shadow:0 1px 2px rgba(15,23,42,.04)}
.card-label{font-size:12.5px;color:var(--muted)}
.card-value{font-size:22px;font-weight:700;margin-top:3px}
.card-sub{font-size:12px;color:var(--muted)}
.section-title{font-weight:700;margin:16px 0 8px;display:flex;gap:8px;align-items:baseline}

/* panels */
.panel{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px;margin-bottom:16px}
.panel.highlight{border-color:#fcd34d;background:#fffbeb}
.panel-title{font-weight:600;margin-bottom:10px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:1080px){.grid2{grid-template-columns:1fr}}

/* tables */
.table-wrap{overflow:auto;max-height:640px;border:1px solid var(--line);border-radius:10px}
table{width:100%;border-collapse:collapse;font-size:13.5px;background:#fff}
th,td{padding:8px 10px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
th{position:sticky;top:0;background:#f8fafc;font-size:12.5px;color:#475569;z-index:1}
tbody tr:hover{background:#f8fafc}
.list{margin:0;padding-left:18px} .list li{margin:4px 0}

/* banners, pills, buttons */
.banner{border-radius:10px;padding:10px 12px;margin-bottom:12px;font-size:14px}
.banner.err{background:#fef2f2;border:1px solid #fecaca;color:#991b1b}
.banner.ok{background:#f0fdf4;border:1px solid #bbf7d0;color:#166534}
.meta{display:flex;gap:8px;align-items:center;margin-bottom:10px;font-size:12.5px}
.pill{background:#e2e8f0;border-radius:999px;padding:2px 9px;font-size:11.5px;color:#334155}
.pill.ok{background:#dcfce7;color:#166534} .pill.bad{background:#fee2e2;color:#991b1b}
.btn{display:inline-block;border:1px solid var(--line);background:#fff;border-radius:9px;padding:8px 13px;
  font:inherit;cursor:pointer;color:var(--ink)}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.ghost{background:transparent}
.btn.small{padding:5px 9px;font-size:12.5px}
form.stack{display:flex;flex-direction:column;gap:9px;max-width:520px}
form.stack.row{flex-direction:row;flex-wrap:wrap;align-items:flex-end;max-width:none}
form.inline{display:inline}
.tabs{display:flex;gap:6px;margin-bottom:12px;flex-wrap:wrap}
.tabs a{padding:7px 12px;border-radius:999px;background:#e2e8f0;color:#334155;font-size:13.5px}
.tabs a.active{background:var(--brand);color:#fff}

/* charts */
.chart{width:100%;height:auto;display:block}
.c-label{font-size:9.5px;fill:#94a3b8}
.c-max{font-size:10px;fill:#cbd5e1}
.legend{display:flex;gap:14px;font-size:12.5px;color:var(--muted);margin-top:6px}
.legend .lg{display:flex;align-items:center;gap:6px}
.legend i{width:10px;height:10px;border-radius:3px;display:inline-block}

/* auth */
.auth-body{display:flex;align-items:center;justify-content:center;min-height:100vh;background:#0f172a}
.auth-card{background:#fff;border-radius:16px;padding:26px;width:min(420px,92vw);box-shadow:0 20px 60px rgba(0,0,0,.35)}
.auth-card label{display:flex;flex-direction:column;gap:4px;font-size:13px;color:#475569}
.auth-card input{max-width:none;width:100%}
#toasts{position:fixed;right:16px;bottom:16px;display:flex;flex-direction:column;gap:8px;z-index:50}
.toast{background:#0f172a;color:#fff;padding:10px 14px;border-radius:10px;font-size:13.5px;max-width:420px;box-shadow:0 8px 24px rgba(0,0,0,.25)}

@media (max-width:820px){
  #app{flex-direction:column}
  .sidebar{width:100%;flex:none;flex-direction:column}
  .sidebar nav{flex-direction:row;flex-wrap:wrap}
  .nav-group{width:100%}
}