:root {
  --bg: #0e0f13; --panel: #181a21; --panel-2: #21242e; --panel-3: #2a2e3a;
  --border: #2c313d; --text: #e6e8ee; --muted: #9aa3b2; --faint: #6b7280;
  --accent: #4c8dff; --accent-2: #2f6fe0; --danger: #e0533d; --ok: #34c759; --warn: #f0a500;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg); color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  display: flex; flex-direction: column; overflow: hidden;
}
button {
  padding: 7px 13px; background: var(--accent); color: #fff; border: 0;
  border-radius: 7px; cursor: pointer; font-weight: 600; font-size: 13px;
}
button:hover { background: var(--accent-2); }
button.ghost { background: var(--panel-3); color: var(--text); }
button.ghost:hover { background: #333949; }
button.danger { background: transparent; color: var(--danger); border: 1px solid var(--danger); }
button.danger:hover { background: rgba(224,83,61,.12); }
button.sm { padding: 4px 9px; font-size: 12px; }
input, select {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 7px; padding: 8px 10px; font-size: 13px; font-family: inherit;
}
input:focus, select:focus { outline: none; border-color: var(--accent); }
a { color: var(--accent); }

/* Login */
.login-wrap { margin: auto; width: 340px; padding: 28px; background: var(--panel); border: 1px solid var(--border); border-radius: 14px; }
.login-wrap h1 { font-size: 20px; margin: 0 0 4px; }
.login-wrap p { color: var(--muted); margin: 0 0 18px; font-size: 13px; }
.login-wrap form { display: flex; flex-direction: column; gap: 10px; }
.login-wrap .hint { margin-top: 14px; font-size: 11.5px; color: var(--faint); line-height: 1.6; }
.err { color: #ffb4a6; font-size: 12.5px; min-height: 16px; }

/* Header */
.header { display: flex; align-items: center; gap: 14px; padding: 10px 16px; background: var(--panel); border-bottom: 1px solid var(--border); }
.header .brand { font-weight: 700; }
.header .spacer { flex: 1; }
.header .who { color: var(--muted); font-size: 13px; }
.badge { font-size: 10.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; padding: 2px 7px; border-radius: 20px; background: var(--panel-3); color: var(--muted); }
.badge.admin { background: rgba(76,141,255,.18); color: #9dc0ff; }

/* Layout */
.body { flex: 1; display: flex; min-height: 0; }
.sidebar { width: 320px; border-right: 1px solid var(--border); background: var(--panel); display: flex; flex-direction: column; }
.sidebar .sos { padding: 12px 10px; border-bottom: 1px solid var(--border); background: var(--panel-2); }
.sos-label { display: block; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; color: var(--warn); margin-bottom: 6px; }
.sos-row { display: flex; gap: 6px; }
.sos-row input { flex: 1; min-width: 0; font-family: ui-monospace, monospace; letter-spacing: 2px; text-align: center; }
.sidebar .search { padding: 10px; border-bottom: 1px solid var(--border); }
.sidebar .search input { width: 100%; }
.tree { flex: 1; overflow: auto; padding: 6px 6px 20px; }
.main { flex: 1; position: relative; background: #050608; display: flex; }
.main iframe { border: 0; width: 100%; height: 100%; }
.empty { margin: auto; text-align: center; color: var(--muted); padding: 20px; }
.empty h2 { color: var(--text); font-weight: 600; }

/* Tree nodes */
.client > .row { font-weight: 700; }
.node .row {
  display: flex; align-items: center; gap: 7px; padding: 5px 8px; border-radius: 6px;
  cursor: default; white-space: nowrap;
}
.node .row:hover { background: var(--panel-2); }
.node .row .tw { width: 14px; color: var(--faint); font-size: 11px; cursor: pointer; text-align: center; flex: none; }
.node .row .ic { flex: none; opacity: .85; }
.node .row .label { overflow: hidden; text-overflow: ellipsis; }
.node .row .count { color: var(--faint); font-size: 11.5px; margin-left: auto; }
.children { margin-left: 16px; border-left: 1px solid var(--border); padding-left: 2px; }

.device .row { cursor: pointer; }
.device .row.offline { cursor: not-allowed; opacity: .55; }
.device .row.selected { background: rgba(76,141,255,.16); }
.dot { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.dot.on { background: var(--ok); box-shadow: 0 0 6px rgba(52,199,89,.7); }
.dot.off { background: var(--faint); }
.plat { font-size: 10.5px; color: var(--faint); text-transform: uppercase; }

/* Admin overlay */
.overlay { position: fixed; inset: 0; background: rgba(0,0,0,.55); display: flex; z-index: 50; }
.modal { margin: auto; width: min(920px, 94vw); max-height: 90vh; background: var(--panel); border: 1px solid var(--border); border-radius: 14px; display: flex; flex-direction: column; overflow: hidden; }
.modal .mhead { display: flex; align-items: center; padding: 14px 18px; border-bottom: 1px solid var(--border); }
.modal .mhead h2 { margin: 0; font-size: 17px; flex: 1; }
.tabs { display: flex; gap: 4px; padding: 10px 14px 0; }
.tabs button { background: transparent; color: var(--muted); border-radius: 8px 8px 0 0; }
.tabs button.active { background: var(--panel-2); color: var(--text); }
.mbody { padding: 16px 18px; overflow: auto; }
.card { background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px; padding: 14px; margin-bottom: 12px; }
.card h3 { margin: 0 0 10px; font-size: 14px; }
.rowline { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.rowline + .rowline { margin-top: 8px; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 12px; }
.muted { color: var(--muted); }
.grant-client { border: 1px solid var(--border); border-radius: 8px; padding: 10px; margin: 8px 0; }
.grant-folders { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 6px 14px; }
.chk { display: flex; align-items: center; gap: 6px; font-size: 12.5px; }
.pill { font-size: 11px; padding: 2px 8px; border-radius: 20px; background: var(--panel-3); color: var(--muted); }

/* Toast */
.toast { position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%); background: var(--panel-3); border: 1px solid var(--border); padding: 9px 15px; border-radius: 10px; opacity: 0; transition: opacity .2s; z-index: 100; }
.toast.show { opacity: 1; }
.toast.err { border-color: var(--danger); color: #ffb4a6; }