:root {
  color-scheme: dark;
  --bg: #080f1b;
  --panel: #0f1a2b;
  --panel2: #0b1422;
  --line: #1e2d45;
  --text: #e5edf7;
  --muted: #7f92aa;
  --green: #22c55e;
  --blue: #38bdf8;
  --amber: #f59e0b;
  --violet: #a78bfa;
  --pink: #f472b6;
  --red: #ef4444;
  --radius: 14px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: radial-gradient(1200px 600px at 20% -10%, #10243c 0%, var(--bg) 55%);
  color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  min-height: 100vh;
}
button, input, select { font: inherit; }
button { cursor: pointer; }
a { color: var(--blue); }

.wrap { max-width: 1080px; margin: 0 auto; padding: 16px 16px 48px; }

/* ---------- login ---------- */
.overlay {
  position: fixed; inset: 0; z-index: 20;
  display: flex; align-items: center; justify-content: center;
  background: rgba(4, 9, 17, .88); backdrop-filter: blur(6px);
  padding: 20px;
}
.login-card {
  width: 100%; max-width: 380px;
  background: linear-gradient(180deg, #122239, #0d1727);
  border: 1px solid var(--line); border-radius: 18px;
  padding: 26px 22px;
  box-shadow: 0 24px 60px rgba(0,0,0,.45);
}
.login-card h1 { margin: 0 0 4px; font-size: 24px; }
.login-card p { margin: 0 0 18px; color: var(--muted); font-size: 13px; }
.login-card input {
  width: 100%; background: #0a1422; border: 1px solid #26374f;
  border-radius: 10px; color: var(--text); padding: 12px 13px;
}
.login-card button {
  width: 100%; margin-top: 12px; border: 0; border-radius: 10px;
  padding: 12px 14px; background: var(--green); color: #04120a; font-weight: 700;
}
.login-card .err { color: var(--red); font-size: 13px; min-height: 19px; margin-top: 10px; }
.ghost {
  background: transparent; color: var(--muted); border: 1px solid var(--line);
  border-radius: 9px; padding: 7px 11px;
}

/* ---------- header ---------- */
header {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 8px 0 18px;
}
header h1 { font-size: 20px; margin: 0; letter-spacing: .3px; }
header .sub { color: var(--muted); font-size: 12px; }
header .spacer { flex: 1; }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.dot.ok { background: var(--green); box-shadow: 0 0 10px var(--green); }
.dot.bad { background: var(--red); }
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid var(--line); background: var(--panel2);
  border-radius: 999px; padding: 5px 10px; font-size: 12px; color: var(--muted);
}
.pill.charge { color: #03130a; background: var(--green); border-color: var(--green); font-weight: 700; }

/* ---------- cards ---------- */
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.card {
  background: linear-gradient(180deg, var(--panel), var(--panel2));
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px; margin-bottom: 14px;
}
.card h2 {
  font-size: 13px; letter-spacing: .6px; text-transform: uppercase;
  color: var(--muted); margin: 0 0 10px; font-weight: 600;
}
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.metric {
  background: #0a1524; border: 1px solid #172841; border-radius: 11px;
  padding: 10px 11px; min-height: 74px;
}
.metric b { display: block; color: var(--muted); font-size: 11px; font-weight: 500; letter-spacing: .3px; }
.metric span { display: block; font-size: 22px; font-variant-numeric: tabular-nums; margin-top: 4px; }
.metric small { color: var(--muted); font-size: 11px; font-weight: 400; margin-left: 2px; }
.metric.v span { color: var(--green); }
.metric.i span { color: var(--blue); }
.metric.p span { color: var(--amber); }
.metric.e span { color: var(--violet); }
.metric.c span { color: var(--pink); }
.metric.t span { color: var(--red); }

.chart-box { position: relative; width: 100%; height: 230px; }
.chart-box canvas { width: 100%; height: 100%; display: block; }

/* ---------- history ---------- */
.toolbar { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-bottom: 10px; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 9px; overflow: hidden; }
.seg button {
  background: transparent; color: var(--muted); border: 0; padding: 7px 12px; font-size: 13px;
}
.seg button.active { background: #163049; color: var(--text); }
.toolbar input[type="datetime-local"] {
  background: #0a1422; border: 1px solid var(--line); color: var(--text);
  border-radius: 9px; padding: 6px 8px; font-size: 13px;
}
.primary {
  border: 0; border-radius: 9px; padding: 8px 14px;
  background: var(--blue); color: #04121c; font-weight: 700;
}
.summary { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin: 4px 0 12px; }
.summary div { background: #0a1524; border-radius: 10px; padding: 9px 10px; }
.summary b { display: block; color: var(--muted); font-size: 11px; font-weight: 500; }
.summary span { font-size: 16px; font-variant-numeric: tabular-nums; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid #16263d; white-space: nowrap; }
th { color: var(--muted); font-weight: 500; font-size: 11px; text-transform: uppercase; letter-spacing: .4px; }
tbody tr { cursor: pointer; }
tbody tr:hover { background: #122034; }
.empty { color: var(--muted); font-size: 13px; padding: 12px 4px; }
.scroll { overflow-x: auto; }

.msg { color: var(--amber); font-size: 13px; min-height: 18px; }
.muted { color: var(--muted); }

@media (max-width: 720px) {
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .summary { grid-template-columns: repeat(2, 1fr); }
  .grid2 { grid-template-columns: 1fr; }
  .metric span { font-size: 20px; }
}

/* ---------- custom dropdown ---------- */
.dd { position: relative; }
.dd-btn {
  display: inline-flex; align-items: center; gap: 7px; max-width: 260px;
  padding: 7px 11px; background: var(--panel2); border: 1px solid var(--line);
  border-radius: 9px; color: var(--text);
}
.dd-btn:hover { border-color: #33507a; background: #122239; }
.dd-label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; }
.dd-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--muted); flex: none; }
.dd-dot.ok { background: var(--green); box-shadow: 0 0 8px var(--green); }
.dd-dot.bad { background: var(--red); }
.dd-caret { color: var(--muted); font-size: 12px; margin-left: 2px; }
.dd-menu {
  position: absolute; right: 0; top: calc(100% + 7px); z-index: 50;
  min-width: 248px; max-width: 320px; max-height: 340px; overflow: auto;
  padding: 6px; background: #0d1929; border: 1px solid #26374f;
  border-radius: 12px; box-shadow: 0 18px 48px rgba(0,0,0,.55);
}
.dd-menu[hidden] { display: none; }
.dd-item {
  display: flex; align-items: center; gap: 10px; width: 100%;
  padding: 9px 10px; border: 0; border-radius: 8px; background: transparent;
  color: var(--text); text-align: left; cursor: pointer;
}
.dd-item:hover { background: #16283f; }
.dd-item.active { background: #163049; }
.dd-main { display: flex; flex-direction: column; gap: 2px; min-width: 0; flex: 1; }
.dd-name { font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dd-meta { font-size: 11px; color: var(--muted); }
.dd-check { width: 18px; color: var(--green); font-weight: 700; text-align: center; flex: none; }
.dd-empty { padding: 10px; color: var(--muted); font-size: 13px; text-align: center; }

/* ---------- custom modal ---------- */
.modal-actions { display: flex; gap: 8px; margin-top: 16px; }
.modal-actions button { flex: 1; width: auto !important; margin-top: 0 !important; }

/* ghost buttons inside the custom server modal must stay neutral */
.login-card .ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
}