:root {
  --bg: #f3f6f9;
  --surface: #ffffff;
  --text: #1b2430;
  --muted: #5a6878;
  --primary: #0f6fda;
  --ok: #1b8f4b;
  --warn: #b67d00;
  --danger: #c43d2f;
  --border: #d9e1ea;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 0% 0%, rgba(15, 111, 218, 0.1), transparent 40%),
    radial-gradient(circle at 100% 100%, rgba(27, 143, 75, 0.08), transparent 35%),
    var(--bg);
  min-height: 100vh;
}

.container {
  width: min(1100px, 92vw);
  margin: 24px auto;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 16px;
}

h1 {
  margin: 0;
  font-size: clamp(1.4rem, 2.8vw, 2rem);
}

.status {
  margin: 0;
  font-weight: 700;
}

.status.online {
  color: var(--ok);
}

.status.offline {
  color: var(--danger);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  box-shadow: 0 10px 24px rgba(20, 40, 70, 0.05);
}

.card h2 {
  margin: 0 0 10px;
  font-size: 1rem;
  color: var(--muted);
}

.value {
  margin: 0 0 10px;
  font-size: 1.2rem;
  font-weight: 800;
  line-height: 1.2;
  overflow-wrap: anywhere;
}

.meta {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.meter {
  width: 100%;
  height: 10px;
  border-radius: 999px;
  background: #e7edf5;
  overflow: hidden;
}

.meter span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--primary);
  transition: width 260ms ease;
}

.meter span.warn {
  background: var(--warn);
}

.meter span.danger {
  background: var(--danger);
}

.error {
  margin-top: 12px;
  color: var(--danger);
  font-weight: 600;
}

.hidden {
  display: none;
}

@media (max-width: 640px) {
  .container {
    margin: 16px auto;
  }

  .header {
    flex-direction: column;
    gap: 6px;
  }
}