:root {
  --bg: #0b0f17;
  --bg-2: #0f1522;
  --card: #141b2a;
  --card-2: #1a2234;
  --border: #242e44;
  --text: #e7ebf3;
  --text-2: #8b93a7;
  --accent: #4f8cff;
  --green: #2ecc71;
  --red: #ff5c5c;
  --amber: #f5b83d;
  --radius: 14px;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "WenQuanYi Micro Hei", -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

.app { max-width: 1080px; margin: 0 auto; padding: 24px 20px 40px; }

/* Top bar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo-dot {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(79,140,255,.18), 0 0 18px rgba(79,140,255,.7);
}
h1 { font-size: 20px; font-weight: 700; }
.subtitle { font-size: 13px; color: var(--text-2); margin-top: 2px; }

/* Buttons */
.btn {
  border: 1px solid var(--border);
  background: var(--card-2);
  color: var(--text);
  padding: 9px 16px;
  border-radius: 9px;
  cursor: pointer;
  font-size: 14px;
  font-family: var(--font);
  transition: all .15s ease;
}
.btn:hover { border-color: var(--accent); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { background: transparent; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* Config panel */
.config-panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.config-panel.hidden { display: none; }
.config-row { display: flex; flex-direction: column; gap: 6px; }
.config-row label { font-size: 13px; color: var(--text-2); }
.config-row input {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 9px;
  color: var(--text);
  padding: 11px 14px;
  font-size: 14px;
  font-family: var(--font);
  outline: none;
}
.config-row input:focus { border-color: var(--accent); }
.config-actions { display: flex; gap: 10px; }

/* Metrics */
.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 22px;
}
.metric-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}
.metric-label { font-size: 13px; color: var(--text-2); margin-bottom: 8px; }
.metric-value { font-size: 24px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.metric-sub { font-size: 12px; color: var(--text-2); margin-top: 4px; }

.status-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.status-dot.online { background: var(--green); box-shadow: 0 0 10px rgba(46,204,113,.8); }
.status-dot.offline { background: var(--red); box-shadow: 0 0 10px rgba(255,92,92,.8); }
.status-dot.pending { background: var(--amber); box-shadow: 0 0 10px rgba(245,184,61,.8); }

/* Cards */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 22px;
}
.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.card-head h2 { font-size: 16px; font-weight: 600; }
.card-head-right { display: flex; align-items: center; gap: 12px; }
.badge {
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2px 10px;
  font-size: 12px;
  color: var(--text-2);
}
.model-select-wrap { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-2); }
.model-select-wrap select {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 8px 10px;
  font-size: 14px;
  font-family: var(--font);
  outline: none;
  max-width: 220px;
}

/* Probe results */
.probe-empty { color: var(--text-2); font-size: 14px; text-align: center; padding: 28px 0; }
.probe-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.probe-item {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  text-align: center;
}
.probe-item .p-label { font-size: 12px; color: var(--text-2); margin-bottom: 6px; }
.probe-item .p-value { font-size: 22px; font-weight: 700; }
.probe-item .p-value.ok { color: var(--green); }
.probe-item .p-value.slow { color: var(--amber); }
.probe-item .p-value.bad { color: var(--red); }
.probe-reply {
  margin-top: 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  font-size: 13px;
  color: var(--text-2);
}
.probe-time { font-size: 12px; color: var(--text-2); margin-top: 10px; }

/* Two columns */
.two-col { display: grid; grid-template-columns: 1.2fr 1fr; gap: 22px; }
.two-col .card { margin-bottom: 0; }

/* Model list */
.model-list { max-height: 420px; overflow-y: auto; }
.model-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 4px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.model-item:last-child { border-bottom: none; }
.model-name { font-family: "Consolas", "SF Mono", monospace; }
.model-tag {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 12px;
  background: rgba(79,140,255,.15);
  color: var(--accent);
  border: 1px solid rgba(79,140,255,.3);
}

/* Chart */
.chart-wrap { width: 100%; height: 300px; display: flex; align-items: center; justify-content: center; }
.chart-wrap svg { width: 100%; height: 100%; }
.axis-label { font-size: 11px; fill: var(--text-2); }
.grid-line { stroke: var(--border); stroke-width: 1; }

/* Footer */
.footer { text-align: center; font-size: 12px; color: var(--text-2); margin-top: 30px; }

.hidden { display: none; }

@media (max-width: 780px) {
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr; gap: 22px; }
  .probe-grid { grid-template-columns: 1fr; }
}