:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --panel-2: #f0f2f5;
  --text: #1b2430;
  --muted: #6b7686;
  --border: #e2e6ec;
  --accent: #3b82f6;
  --accent-contrast: #ffffff;
  --danger: #ef4444;
  --shadow: 0 1px 3px rgba(16, 24, 40, .08), 0 1px 2px rgba(16, 24, 40, .06);

  --k-online: #22c55e;
  --k-offline: #94a3b8;
  --k-recently: #eab308;
  --k-last_week: #f97316;
  --k-last_month: #ef4444;
  --k-hidden: #64748b;
  --k-unknown: #cbd5e1;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1420;
    --panel: #161d2b;
    --panel-2: #1d2637;
    --text: #e6ebf2;
    --muted: #94a3b8;
    --border: #26303f;
    --accent: #4f8cf7;
    --shadow: 0 1px 3px rgba(0, 0, 0, .4);
    --k-unknown: #3a4658;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.45;
}

#topbar {
  display: flex; align-items: center; gap: 18px;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 700; font-size: 17px; }
#nav { display: flex; gap: 6px; flex: 1; }
#nav a {
  text-decoration: none; color: var(--muted);
  padding: 6px 12px; border-radius: 8px; font-weight: 600; font-size: 14px;
}
#nav a.active, #nav a:hover { color: var(--text); background: var(--panel-2); }

main { max-width: 1100px; margin: 0 auto; padding: 22px 20px 60px; }

.card, .panel {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 14px; box-shadow: var(--shadow);
}

button {
  font: inherit; cursor: pointer; border: 1px solid var(--border);
  background: var(--panel-2); color: var(--text);
  padding: 8px 14px; border-radius: 9px; font-weight: 600;
}
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); }
button.ghost { background: transparent; }
button.danger { color: var(--danger); border-color: transparent; background: transparent; }
button.danger:hover { border-color: var(--danger); }
button:disabled { opacity: .55; cursor: default; }

input, select {
  font: inherit; color: var(--text); background: var(--panel);
  border: 1px solid var(--border); border-radius: 9px; padding: 8px 11px;
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
label { color: var(--muted); font-size: 13px; font-weight: 600; }

/* Login */
.login-wrap { min-height: 70vh; display: grid; place-items: center; }
.login-box { width: min(380px, 92vw); padding: 28px; text-align: center; }
.login-box h1 { font-size: 20px; margin: 0 0 6px; }
.login-box p { color: var(--muted); margin: 0 0 20px; font-size: 14px; }
.login-box .row { display: flex; gap: 10px; }
.login-box input { flex: 1; text-align: center; letter-spacing: 2px; font-weight: 700; text-transform: uppercase; }
.hint { font-size: 13px; color: var(--muted); margin-top: 16px; }
.hint code { background: var(--panel-2); padding: 1px 6px; border-radius: 5px; }

/* Cards */
.toolbar { display: flex; gap: 10px; align-items: center; margin-bottom: 18px; flex-wrap: wrap; }
.toolbar .grow { flex: 1; }
.cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.contact-card { padding: 16px; display: flex; flex-direction: column; gap: 10px; }
.contact-card .head { display: flex; align-items: center; gap: 10px; }
.dot { width: 11px; height: 11px; border-radius: 50%; flex: none; }
.contact-card .name { font-weight: 700; font-size: 16px; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.contact-card .status { font-size: 13px; color: var(--muted); }
.contact-card .meta { font-size: 12.5px; color: var(--muted); }
.contact-card .actions { display: flex; gap: 8px; align-items: center; margin-top: 4px; flex-wrap: wrap; }
.contact-card .actions .grow { flex: 1; }

.switch { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; color: var(--muted); cursor: pointer; }
.switch input { display: none; }
.switch .track { width: 34px; height: 20px; border-radius: 999px; background: var(--panel-2); border: 1px solid var(--border); position: relative; transition: background .15s; }
.switch .track::after { content: ""; position: absolute; top: 2px; left: 2px; width: 14px; height: 14px; border-radius: 50%; background: var(--muted); transition: transform .15s, background .15s; }
.switch input:checked + .track { background: color-mix(in srgb, var(--accent) 35%, transparent); }
.switch input:checked + .track::after { transform: translateX(14px); background: var(--accent); }

.empty { text-align: center; color: var(--muted); padding: 50px 0; }
.badge { font-size: 11px; padding: 2px 8px; border-radius: 999px; background: var(--panel-2); color: var(--muted); }
.badge.pending { background: color-mix(in srgb, var(--k-recently) 22%, transparent); color: var(--k-recently); }

/* Settings */
.settings-grid { display: grid; gap: 16px; max-width: 560px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.rowline { display: flex; gap: 12px; align-items: center; }

/* Timeline page */
.tl-header { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.tl-header .name { font-weight: 700; font-size: 18px; }
.tl-controls { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 12px; }
.tl-controls .sep { flex: 1; }
.tl-panel { padding: 16px; }
.tl-legend { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 14px; font-size: 12.5px; color: var(--muted); }
.tl-legend span { display: inline-flex; align-items: center; gap: 6px; }
.tl-legend i { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }
.tl-label { font-size: 12px; color: var(--muted); margin: 8px 2px 4px; }

svg.timeline { width: 100%; display: block; user-select: none; touch-action: none; }
svg.timeline text { fill: var(--muted); font-size: 11px; }
.handle { fill: var(--accent); }
.handle-hit { fill: transparent; cursor: ew-resize; }
.window-body { cursor: grab; }
.mask { fill: var(--bg); opacity: .55; }

.tooltip {
  position: fixed; pointer-events: none; z-index: 50;
  background: var(--panel); border: 1px solid var(--border); box-shadow: var(--shadow);
  border-radius: 8px; padding: 8px 10px; font-size: 12.5px; max-width: 260px;
}
.tooltip .t-kind { font-weight: 700; margin-bottom: 3px; }
.tooltip .t-row { color: var(--muted); }

.toast {
  position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%);
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 10px;
  font-size: 14px; box-shadow: var(--shadow); z-index: 100;
}
.spinner { display: inline-block; width: 14px; height: 14px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Compare page */
.cmp-panel { padding: 16px; }
.cmp-select { min-width: 220px; }
.cmp-grid { display: flex; flex-direction: column; gap: 6px; }
.cmp-rows { margin: 6px 0; }
.cmp-row { display: grid; grid-template-columns: 190px 1fr; align-items: center; gap: 10px; border-radius: 6px; }
.cmp-rowhead { display: flex; align-items: center; gap: 6px; min-width: 0; }
.cmp-rowlabel { flex: 1; min-width: 0; font-size: 13px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cmp-handle { cursor: grab; color: var(--muted); user-select: none; padding: 0 2px; }
.cmp-handle:active { cursor: grabbing; }
button.mini { padding: 2px 6px; font-size: 12px; border-radius: 6px; line-height: 1; }
.cmp-row.dragging { opacity: .5; }
.cmp-row.drop-before { box-shadow: inset 0 3px 0 -1px var(--accent); }
.cmp-row.drop-after { box-shadow: inset 0 -3px 0 -1px var(--accent); }
.cmp-row.err { opacity: .55; }
.cmp-divider { font-size: 12px; color: var(--muted); font-weight: 700; text-transform: uppercase; letter-spacing: .04em; margin: 12px 0 4px; border-top: 1px solid var(--border); padding-top: 10px; }
.cmp-legends { display: flex; flex-direction: column; gap: 8px; margin-top: 16px; }
.cmp-legend-title { color: var(--muted); font-weight: 600; margin-right: 4px; }

@media (max-width: 600px) {
  .cmp-row { grid-template-columns: 120px 1fr; }
  .cmp-rowlabel { font-size: 12px; }
}