:root {
  --bg: #0b0d12;
  --panel: #12151c;
  --panel2: #1a1e27;
  --hover: #20252f;
  --border: #252a35;
  --text: #e6e9ef;
  --muted: #8a93a3;
  --accent: #6d7cff;
  --accent-soft: rgba(109, 124, 255, .14);
  --danger: #f2555a;
  --danger-soft: rgba(242, 85, 90, .12);
  --ok: #34d399;
  --warn: #fbbf24;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f6fa; --panel: #ffffff; --panel2: #f1f3f8; --hover: #eceff6; --border: #e3e6ee;
    --text: #1b1f2a; --muted: #6b7385; --accent: #4f5df5; --accent-soft: rgba(79, 93, 245, .1);
    --danger: #e0393f; --danger-soft: rgba(224, 57, 63, .08); --ok: #10b981; --warn: #d97706;
    --shadow: 0 1px 2px rgba(16,24,40,.05), 0 8px 24px rgba(16,24,40,.06);
    color-scheme: light;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg); color: var(--text);
  font: 14px/1.5 Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}
.hidden { display: none !important; }
.muted { color: var(--muted); }
.error { color: var(--danger); min-height: 1.2em; margin: 0; }
.spacer { flex: 1; }
a { color: var(--accent); }
h2 { margin: 0 0 18px; font-size: 22px; font-weight: 650; letter-spacing: -.01em; }
h3 { margin: 24px 0 10px; font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
::selection { background: var(--accent-soft); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 10px; border: 2px solid var(--bg); }

/* ---------- controls */
button, input, select, textarea {
  font: inherit; color: var(--text); background: var(--panel2);
  border: 1px solid var(--border); border-radius: 8px; padding: 7px 12px;
  transition: border-color .15s, background .15s, box-shadow .15s, transform .05s;
}
textarea { width: 100%; min-height: 90px; resize: vertical; }
button { cursor: pointer; white-space: nowrap; font-weight: 500; }
button:hover { background: var(--hover); }
button:active { transform: translateY(1px); }
button:disabled { opacity: .45; cursor: default; }
button.primary { background: var(--accent); border-color: transparent; color: #fff; box-shadow: 0 2px 8px var(--accent-soft); }
button.primary:hover { filter: brightness(1.08); }
button.danger { color: var(--danger); background: transparent; border-color: var(--border); }
button.danger:hover { background: var(--danger-soft); border-color: transparent; }
button.small { padding: 3px 10px; font-size: 12px; border-radius: 6px; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
input[type=checkbox] { accent-color: var(--accent); width: 15px; height: 15px; padding: 0; }
label { display: flex; flex-direction: column; gap: 6px; color: var(--muted); font-size: 12px; font-weight: 500; }
label.check { flex-direction: row; align-items: center; gap: 8px; color: var(--text); font-size: 14px; font-weight: 400; cursor: pointer; }

/* ---------- login */
.login {
  display: grid; place-items: center; height: 100%; padding: 16px;
  background: radial-gradient(800px 400px at 50% -10%, var(--accent-soft), transparent);
}
.card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.login .card { width: 100%; max-width: 360px; display: flex; flex-direction: column; gap: 14px; padding: 28px; }
.login h1 { margin: 0 0 6px; font-size: 22px; display: flex; align-items: center; gap: 10px; }
.login h1::before, .brand::before {
  content: ""; width: 22px; height: 22px; border-radius: 7px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
}
.login button.primary { padding: 10px; }

/* ---------- shell */
#app { height: 100%; }
header {
  display: flex; align-items: center; gap: 12px; padding: 10px 20px; height: 56px;
  background: color-mix(in srgb, var(--panel) 85%, transparent); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; display: flex; align-items: center; gap: 10px; letter-spacing: -.01em; }
#server-status { font-size: 13px; padding: 3px 10px; border-radius: 999px; background: var(--panel2); border: 1px solid var(--border); }
.layout { display: flex; height: calc(100% - 56px); }
nav { width: 220px; flex-shrink: 0; background: var(--panel); border-right: 1px solid var(--border); padding: 12px 10px; overflow-y: auto; }
nav a {
  display: block; padding: 8px 12px; margin-bottom: 2px; border-radius: 8px;
  color: var(--muted); text-decoration: none; cursor: pointer; font-weight: 500; transition: background .15s, color .15s;
}
nav a:hover { background: var(--hover); color: var(--text); }
nav a.active { background: var(--accent-soft); color: var(--accent); }
main { flex: 1; overflow: auto; padding: 28px 32px; min-width: 0; }
main > * { max-width: 1400px; }

/* ---------- layout helpers */
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: end; margin-bottom: 16px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 14px; margin-bottom: 8px; }
.stat {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px;
  box-shadow: var(--shadow); position: relative; overflow: hidden;
}
.stat::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 3px; background: var(--accent); opacity: .7; }
.stat .label { color: var(--muted); font-size: 12px; font-weight: 500; }
.stat .value { font-size: 21px; font-weight: 650; margin-top: 4px; word-break: break-word; letter-spacing: -.01em; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

/* ---------- tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel); box-shadow: var(--shadow); }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { background: var(--panel); color: var(--muted); font-weight: 600; font-size: 11px; text-transform: uppercase; letter-spacing: .05em; position: sticky; top: 0; }
tbody tr { transition: background .1s; }
tbody tr:hover { background: var(--panel2); }
tr:last-child td { border-bottom: none; }
td.actions { white-space: nowrap; text-align: right; }
td.actions button { margin-left: 4px; }
td input, td select { width: 100%; padding: 4px 8px; }
.mono { font-family: ui-monospace, "JetBrains Mono", "SFMono-Regular", Menlo, monospace; font-size: 12px; }

/* ---------- channel tree */
.split { display: grid; grid-template-columns: minmax(300px, 1fr) minmax(320px, 1fr); gap: 18px; align-items: start; }
.tree { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 10px; box-shadow: var(--shadow); }
.tree ul { list-style: none; margin: 0; padding-left: 16px; border-left: 1px dashed var(--border); margin-left: 13px; }
.tree > ul { padding-left: 0; border-left: none; margin-left: 0; }
.node { display: flex; align-items: center; gap: 8px; padding: 5px 8px; border-radius: 7px; cursor: pointer; transition: background .1s; }
.node:hover { background: var(--hover); }
.node.selected { background: var(--accent-soft); color: var(--accent); }
.node .icon { width: 16px; text-align: center; color: var(--muted); font-size: 12px; }
.node.client .icon { color: var(--ok); }
.node.client.away .icon { color: var(--warn); }
.badge { font-size: 11px; padding: 1px 8px; border-radius: 999px; background: var(--panel2); color: var(--muted); font-weight: 500; }
.badge.red { color: var(--danger); background: var(--danger-soft); }
.detail { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; position: sticky; top: 0; box-shadow: var(--shadow); }
.detail h3 { text-transform: none; letter-spacing: -.01em; font-size: 18px; color: var(--text); }
.kv { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; font-size: 13px; }
.kv div:nth-child(odd) { color: var(--muted); }
.kv div { word-break: break-word; }

/* ---------- modals & toasts */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(5, 7, 12, .55); backdrop-filter: blur(4px);
  display: grid; place-items: center; z-index: 50; padding: 16px; animation: fade .15s ease-out;
}
.modal {
  background: var(--panel); border: 1px solid var(--border); border-radius: 16px; width: 100%; max-width: 720px; max-height: 90vh;
  display: flex; flex-direction: column; box-shadow: 0 24px 64px rgba(0,0,0,.4); animation: pop .18s ease-out;
}
.modal.wide { max-width: 1100px; }
.modal-head { display: flex; align-items: center; padding: 16px 20px; border-bottom: 1px solid var(--border); }
.modal-head h3 { margin: 0; flex: 1; font-size: 16px; text-transform: none; letter-spacing: 0; color: var(--text); }
.modal-head button { border: none; background: transparent; color: var(--muted); }
.modal-body { padding: 20px; overflow: auto; display: flex; flex-direction: column; gap: 14px; }
.modal-body p { margin: 0; }
.modal-foot { padding: 14px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }
@keyframes fade { from { opacity: 0; } }
@keyframes pop { from { opacity: 0; transform: translateY(8px) scale(.98); } }
@keyframes slide { from { opacity: 0; transform: translateX(16px); } }

#toasts { position: fixed; right: 20px; bottom: 20px; display: flex; flex-direction: column; gap: 8px; z-index: 100; max-width: 420px; }
.toast {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 11px 16px 11px 14px;
  box-shadow: var(--shadow); display: flex; gap: 10px; align-items: baseline; animation: slide .2s ease-out;
}
.toast::before { content: "●"; color: var(--ok); font-size: 10px; }
.toast.err::before { color: var(--danger); }
pre.out {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; margin: 0;
  overflow: auto; max-height: 65vh; white-space: pre-wrap; word-break: break-word; box-shadow: var(--shadow);
}

@media (max-width: 800px) {
  .layout { flex-direction: column; height: auto; }
  nav { width: 100%; display: flex; gap: 4px; overflow-x: auto; padding: 8px; border-right: none; border-bottom: 1px solid var(--border); }
  nav a { white-space: nowrap; margin: 0; }
  main { padding: 16px; }
  .split { grid-template-columns: 1fr; }
  header { flex-wrap: wrap; height: auto; padding: 10px 16px; }
}