:root {
  color-scheme: light;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, #e5f3ff 0%, #f5f8fc 100%);
  color: #1f2937;
}

.app {
  width: min(92vw, 420px);
  padding: 1.25rem;
}

h1 {
  margin: 0;
  font-size: 1.8rem;
}

.subtitle {
  margin: 0.25rem 0 1rem;
  color: #4b5563;
}

.card {
  background: #ffffff;
  border: 1px solid #dbe5ee;
  border-radius: 12px;
  padding: 1rem;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.07);
}

#status {
  margin: 0;
  font-weight: 600;
}

.value {
  margin: 0.6rem 0;
  font-size: 2.2rem;
  font-weight: 700;
}

.condition {
  margin: 0.25rem 0 0.6rem;
  font-weight: 600;
  color: #334155;
}

.meter {
  width: 100%;
  height: 12px;
  border-radius: 999px;
  background: #e2e8f0;
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.meter-fill {
  height: 100%;
  width: 0%;
  border-radius: inherit;
  background: #60a5fa;
  transition: width 240ms ease;
}

.muted {
  margin: 0.25rem 0;
  color: #6b7280;
}

button {
  margin-top: 0.9rem;
  width: 100%;
  border: none;
  border-radius: 10px;
  padding: 0.75rem;
  font-size: 1rem;
  font-weight: 600;
  color: #ffffff;
  background: #2563eb;
  cursor: pointer;
}

button:hover {
  background: #1d4ed8;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}