:root {
  --bg: #f4f6fa;
  --panel: #ffffff;
  --text: #1b2430;
  --muted: #6b7686;
  --line: #e3e8ef;
  --accent: #1f6feb;
  --accent-2: #0d4fc4;
  --ok: #1a9c5b;
  --warn: #d98a00;
  --danger: #d8343f;
  --busy: #8a4fff;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 1px 3px rgba(16, 24, 40, 0.1);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f141b;
    --panel: #171d26;
    --text: #e6ebf2;
    --muted: #93a0b2;
    --line: #28313d;
    --accent: #3b82f6;
    --accent-2: #60a5fa;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}
a { color: var(--accent); text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 7px 12px;
  cursor: pointer;
}
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover { background: var(--accent-2); }
button.danger { color: var(--danger); }
button.small { padding: 4px 8px; font-size: 12px; }
button:disabled { opacity: 0.5; cursor: default; }
input, select, textarea {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  width: 100%;
}
input:focus, select:focus, textarea:focus { outline: 2px solid color-mix(in srgb, var(--accent) 40%, transparent); border-color: var(--accent); }
label { display: block; font-size: 12px; color: var(--muted); margin: 10px 0 4px; }
h1 { font-size: 20px; margin: 0 0 14px; }
h2 { font-size: 16px; margin: 18px 0 10px; }
.muted { color: var(--muted); }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.grow { flex: 1; }
.right { margin-left: auto; }

/* layout */
.shell { display: grid; grid-template-columns: 230px 1fr; min-height: 100vh; }
.side {
  background: var(--panel);
  border-right: 1px solid var(--line);
  padding: 18px 14px;
  position: sticky; top: 0; height: 100vh;
  display: flex; flex-direction: column;
}
.brand { font-weight: 700; font-size: 18px; letter-spacing: 0.3px; margin-bottom: 4px; }
.brand span { color: var(--accent); }
.team { font-size: 12px; color: var(--muted); margin-bottom: 18px; }
.nav a {
  display: block; padding: 8px 10px; border-radius: 8px; color: var(--text); margin-bottom: 2px;
}
.nav a.active, .nav a:hover { background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent); }
.side .me { margin-top: auto; font-size: 12px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 10px; }
.main { padding: 24px 28px; max-width: 1300px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; box-shadow: var(--shadow); margin-bottom: 16px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 900px) { .shell { grid-template-columns: 1fr; } .side { position: static; height: auto; } .grid2 { grid-template-columns: 1fr; } }

/* tablas */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { font-size: 12px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.3px; }
tr:hover td { background: color-mix(in srgb, var(--accent) 5%, transparent); }
td .actions { display: flex; gap: 6px; flex-wrap: wrap; }
.dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 7px; vertical-align: middle; background: var(--muted); }
.dot.online { background: var(--ok); }
.dot.in_session { background: var(--busy); }
.dot.offline { background: #b7c0cc; }
.tag { display: inline-block; font-size: 11px; padding: 2px 7px; border-radius: 999px; background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent); }
.tag.role-owner { background: color-mix(in srgb, var(--warn) 18%, transparent); color: var(--warn); }
.tag.role-admin { background: color-mix(in srgb, var(--busy) 15%, transparent); color: var(--busy); }
.tag.off { background: color-mix(in srgb, var(--danger) 12%, transparent); color: var(--danger); }
code, .code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13px; background: color-mix(in srgb, var(--text) 6%, transparent); padding: 2px 6px; border-radius: 6px; }
pre { background: color-mix(in srgb, var(--text) 6%, transparent); padding: 10px 12px; border-radius: 8px; overflow: auto; font-size: 12px; }

/* auth */
.auth { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.auth .card { width: min(420px, 100%); }
.auth .brand { font-size: 24px; text-align: center; margin-bottom: 14px; }

/* modal */
.modal-bg { position: fixed; inset: 0; background: rgba(0,0,0,0.45); display: grid; place-items: center; z-index: 50; }
.modal { background: var(--panel); border-radius: var(--radius); padding: 18px 20px; width: min(560px, 94vw); max-height: 90vh; overflow: auto; box-shadow: 0 20px 60px rgba(0,0,0,0.35); }
.modal h2 { margin-top: 0; }
.modal .buttons { display: flex; gap: 8px; justify-content: flex-end; margin-top: 16px; }

/* toast */
.toast { position: fixed; right: 18px; bottom: 18px; background: var(--text); color: var(--bg); padding: 10px 14px; border-radius: 8px; box-shadow: var(--shadow); z-index: 60; max-width: 420px; }
.toast.err { background: var(--danger); color: #fff; }
.toast.ok { background: var(--ok); color: #fff; }

.kv { display: grid; grid-template-columns: 160px 1fr; gap: 4px 12px; font-size: 13px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }
.stat { display: inline-flex; flex-direction: column; padding: 10px 14px; border: 1px solid var(--line); border-radius: 8px; min-width: 120px; }
.stat b { font-size: 22px; }
.stat span { font-size: 12px; color: var(--muted); }
.checks label { display: flex; align-items: center; gap: 8px; margin: 6px 0; color: var(--text); font-size: 13px; }
.checks input { width: auto; }
.empty { padding: 30px; text-align: center; color: var(--muted); }