:root{
  --bg:#0e1420; --bg2:#151d2e; --panel:#1a2438; --panel2:#212d45;
  --line:#2b3852; --text:#e8eef8; --muted:#8899b3; --brand:#3b82f6; --brand2:#60a5fa;
  --ok:#22c55e; --busy:#eab308; --near:#f97316; --full:#ef4444;
  --shadow:0 8px 30px rgba(0,0,0,.35);
  --bar:rgba(21,29,46,.85); --side:rgba(17,24,38,.96); --glow:rgba(59,130,246,.12);
}
:root[data-theme="light"]{
  --bg:#eef1f7; --bg2:#f4f6fb; --panel:#ffffff; --panel2:#eaeef6;
  --line:#dde3ee; --text:#1a2438; --muted:#5b6b85; --brand:#2563eb; --brand2:#3b82f6;
  --ok:#16a34a; --busy:#ca8a04; --near:#ea580c; --full:#dc2626;
  --shadow:0 8px 26px rgba(30,41,59,.12);
  --bar:rgba(255,255,255,.85); --side:#ffffff; --glow:rgba(59,130,246,.10);
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font-family:'Sarabun',system-ui,sans-serif;background:
  radial-gradient(1200px 600px at 80% -10%,var(--glow),transparent),
  var(--bg);color:var(--text);font-size:15px}
h1,h2,b{font-family:'Kanit','Sarabun',sans-serif;font-weight:600}
.muted{color:var(--muted)}
.hidden{display:none!important}
button{cursor:pointer;font-family:inherit}

/* Login */
.login-overlay{position:fixed;inset:0;display:grid;place-items:center;
  background:radial-gradient(900px 500px at 50% 0%,rgba(59,130,246,.18),transparent),var(--bg);z-index:50}
.login-card{background:var(--panel);border:1px solid var(--line);border-radius:18px;
  padding:34px 32px;width:340px;box-shadow:var(--shadow);text-align:center;animation:pop .3s ease}
@keyframes pop{from{transform:translateY(12px) scale(.97);opacity:0}to{transform:none;opacity:1}}
.login-logo{font-size:44px}
.login-card h1{margin:.3em 0 .1em;font-size:24px}
.login-card label{display:block;text-align:left;margin:14px 0 4px;font-size:13px;color:var(--muted)}
.login-card input{width:100%;padding:11px 12px;border-radius:10px;border:1px solid var(--line);
  background:var(--bg2);color:var(--text);font-family:inherit;font-size:15px}
.login-card input:focus{outline:none;border-color:var(--brand)}
.login-card button{width:100%;margin-top:20px;padding:12px;border:none;border-radius:10px;
  background:linear-gradient(135deg,var(--brand),#2563eb);color:#fff;font-weight:600;font-size:15px}
.login-card button:hover{filter:brightness(1.08)}
.login-error{color:var(--full);min-height:20px;margin-top:10px;font-size:13px}
.hint{margin:14px 0 0;font-size:12px}

/* Layout: left sidebar + content */
.app{display:flex;min-height:100vh}
.sidebar{width:250px;flex-shrink:0;background:var(--side);border-right:1px solid var(--line);
  display:flex;flex-direction:column;padding:18px 14px;position:fixed;inset:0 auto 0 0;height:100vh;z-index:30}
.content{flex:1;min-width:0;margin-left:250px}

.brand{display:flex;align-items:center;gap:10px;padding:6px 8px 18px;border-bottom:1px solid var(--line);margin-bottom:14px}
.brand .logo{font-size:26px}
.brand b{font-family:'Kanit';font-size:16px;line-height:1.15}
.brand small{display:block;color:var(--muted);font-size:11px}

.menu{display:flex;flex-direction:column;gap:4px}
.tab{display:flex;align-items:center;gap:12px;width:100%;text-align:left;background:transparent;border:none;
  color:var(--muted);padding:11px 14px;border-radius:10px;font-size:14.5px;font-family:inherit}
.tab .ic{font-size:17px;width:22px;text-align:center;flex-shrink:0}
.tab:hover{color:var(--text);background:var(--panel)}
.tab.active{color:#fff;background:linear-gradient(135deg,var(--brand),#2563eb);
  box-shadow:0 4px 14px rgba(59,130,246,.35)}
.logout-btn{margin-top:auto;display:flex;align-items:center;gap:12px;justify-content:flex-start;
  width:100%;padding:11px 14px;font-size:14px}
.logout-btn .ic{font-size:16px;width:22px;text-align:center}

/* Top bar */
.topbar{display:flex;align-items:center;gap:16px;padding:14px 24px;background:var(--bar);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.page-title{font-family:'Kanit';font-size:20px;font-weight:600;margin:0}
.menu-toggle{display:none;background:transparent;border:none;color:var(--text);font-size:22px;line-height:1;padding:0 4px}
.topright{margin-left:auto;display:flex;align-items:center;gap:12px}
.icon-btn{background:var(--panel);border:1px solid var(--line);color:var(--text);width:38px;height:38px;
  border-radius:10px;font-size:17px;line-height:1;display:grid;place-items:center;transition:border-color .12s}
.icon-btn:hover{border-color:var(--brand)}
.clock{font-variant-numeric:tabular-nums;color:var(--muted);font-size:13px}
.ghost{background:transparent;border:1px solid var(--line);color:var(--muted);padding:8px 14px;border-radius:9px}
.ghost:hover{color:var(--text);border-color:var(--brand)}
.sidebar-backdrop{display:none}

main{max-width:1240px;margin:0 auto;padding:22px}
.datahint{color:var(--muted);font-size:13px;margin-bottom:16px}
.section-title{margin:26px 0 12px}

/* Summary cards */
.summary{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.card{background:linear-gradient(160deg,var(--panel),var(--bg2));border:1px solid var(--line);
  border-radius:16px;padding:18px 20px;position:relative;overflow:hidden}
.card .k{color:var(--muted);font-size:13px}
.card .v{font-family:'Kanit';font-size:34px;font-weight:600;margin-top:4px;line-height:1}
.card .u{font-size:13px;color:var(--muted);margin-left:6px;font-family:'Sarabun'}
.card .spark{position:absolute;right:-6px;top:-6px;font-size:56px;opacity:.08}
.card.accent-green{border-color:rgba(34,197,94,.4)}
.card.accent-red{border-color:rgba(239,68,68,.4)}
.card.accent-blue{border-color:rgba(59,130,246,.4)}

.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:18px}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:18px 20px}
.panel h2{margin:0 0 14px;font-size:16px}
.donut-wrap{position:relative;height:230px;display:grid;place-items:center}
.donut-center{position:absolute;text-align:center}
.donut-center b{font-family:'Kanit';font-size:30px;display:block}
.donut-center span{color:var(--muted);font-size:13px}

/* Zone cards */
.zones{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px}
.zone{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px;
  transition:transform .12s,border-color .12s}
.zone:hover{transform:translateY(-3px);border-color:var(--brand)}
.zone .zhead{display:flex;justify-content:space-between;align-items:center}
.zone .zname{font-family:'Kanit';font-size:17px;font-weight:600}
.pill{font-size:11px;padding:3px 9px;border-radius:20px;font-weight:600}
.pill.ok{background:rgba(34,197,94,.15);color:var(--ok)}
.pill.busy{background:rgba(234,179,8,.15);color:var(--busy)}
.pill.nearfull{background:rgba(249,115,22,.15);color:var(--near)}
.pill.full{background:rgba(239,68,68,.15);color:var(--full)}
.zone .big{display:flex;align-items:baseline;gap:6px;margin:12px 0 4px}
.zone .big b{font-family:'Kanit';font-size:32px;line-height:1}
.zone .big small{color:var(--muted);font-size:13px}
.bar{height:9px;border-radius:6px;background:var(--bg2);overflow:hidden;margin-top:10px}
.bar > i{display:block;height:100%;border-radius:6px;transition:width .5s}
.bar > i.ok{background:var(--ok)} .bar > i.busy{background:var(--busy)}
.bar > i.nearfull{background:var(--near)} .bar > i.full{background:var(--full)}
.zone .meta{display:flex;justify-content:space-between;color:var(--muted);font-size:12px;margin-top:9px}

/* toolbar & tables */
.toolbar{display:flex;gap:20px;margin-bottom:16px}
.toolbar label{color:var(--muted);font-size:13px;display:flex;flex-direction:column;gap:5px}
.toolbar select{padding:9px 12px;border-radius:9px;border:1px solid var(--line);background:var(--panel);color:var(--text);font-family:inherit;font-size:14px}
.table-scroll{max-height:600px;overflow:auto;border-radius:10px}
table{width:100%;border-collapse:collapse;font-size:13.5px}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);white-space:nowrap}
th{position:sticky;top:0;background:var(--panel2);color:var(--muted);font-weight:600;z-index:1}
tbody tr:hover{background:var(--bg2)}
.tag{font-size:11px;padding:2px 8px;border-radius:6px;background:var(--bg2);border:1px solid var(--line)}
.tag.in{color:var(--ok);border-color:rgba(34,197,94,.35)}
.tag.out{color:var(--near);border-color:rgba(249,115,22,.35)}

/* buttons */
.primary{background:linear-gradient(135deg,var(--brand),#2563eb);color:#fff;border:none;
  padding:9px 18px;border-radius:9px;font-weight:600;font-size:14px}
.primary:hover{filter:brightness(1.1)}
.btn-sm{padding:5px 11px;border-radius:7px;font-size:12.5px;border:1px solid var(--line);background:var(--bg2);color:var(--text)}
.btn-sm:hover{border-color:var(--brand)}
.btn-sm.danger:hover{border-color:var(--full);color:var(--full)}

/* sync badge */
.sync-badge{font-size:13px;padding:7px 13px;border-radius:9px;border:1px solid var(--line);background:var(--panel)}
.sync-badge.on{color:var(--ok);border-color:rgba(34,197,94,.35)}
.sync-badge.off{color:var(--near);border-color:rgba(249,115,22,.35)}

/* modal */
.modal-overlay{position:fixed;inset:0;background:rgba(6,10,18,.7);backdrop-filter:blur(4px);
  display:grid;place-items:center;z-index:60}
.modal-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:26px 28px;
  width:400px;max-width:92vw;box-shadow:var(--shadow);animation:pop .2s ease}
.modal-card h2{margin:0 0 16px}
.modal-card label{display:block;font-size:13px;color:var(--muted);margin:12px 0 4px}
.modal-card input{width:100%;padding:10px 12px;border-radius:9px;border:1px solid var(--line);
  background:var(--bg2);color:var(--text);font-family:inherit;font-size:14px}
.modal-card input:focus{outline:none;border-color:var(--brand)}
.modal-error{color:var(--full);font-size:13px;min-height:18px;margin-top:10px}
.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:18px}

/* toast */
.toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%);z-index:70;
  padding:12px 20px;border-radius:10px;font-size:14px;box-shadow:var(--shadow);border:1px solid var(--line);
  background:var(--panel2);animation:pop .2s ease}
.toast.ok{border-color:rgba(34,197,94,.5)}
.toast.warn{border-color:rgba(249,115,22,.5)}
.toast.err{border-color:rgba(239,68,68,.5)}

.foot{text-align:center;padding:24px;font-size:12px}
@media(max-width:900px){
  .summary{grid-template-columns:repeat(2,1fr)}
  .grid-2{grid-template-columns:1fr}
  .content{margin-left:0}
  .menu-toggle{display:block}
  .sidebar{transform:translateX(-100%);transition:transform .25s ease;box-shadow:var(--shadow)}
  .app.nav-open .sidebar{transform:none}
  .app.nav-open .sidebar-backdrop{display:block;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:25}
}
@media(max-width:560px){ .summary{grid-template-columns:1fr} }