:root {
  --bg-primary: #0f172a;
  --bg-surface: #1e293b;
  --bg-surface-elevated: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #38bdf8;
  --accent-glow: rgba(56, 189, 248, 0.15);
  --success: #22c55e;
  --success-glow: rgba(34, 197, 94, 0.25);
  --border-color: rgba(255, 255, 255, 0.08);
  --radius-lg: 1rem;
  --radius-md: 0.75rem;
  --radius-sm: 0.375rem;
  --font-mono:
    ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
}

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

body {
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    Oxygen,
    Ubuntu,
    Cantarell,
    sans-serif;
  min-height: 100vh;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
  line-height: 1.5;
}

.app-container {
  width: 100%;
  max-width: 1040px;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.app-header {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.live-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--success);
  background-color: var(--success-glow);
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  border: 1px solid rgba(34, 197, 94, 0.3);
  margin-bottom: 0.5rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--success);
  animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.4;
    transform: scale(0.85);
  }
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}

.subtitle {
  color: var(--text-secondary);
  font-size: clamp(0.95rem, 2vw, 1.1rem);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Hero Section */
.hero-card {
  background: linear-gradient(
    135deg,
    rgba(56, 189, 248, 0.08) 0%,
    rgba(30, 41, 59, 0.9) 100%
  );
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.5rem;
  text-align: center;
  box-shadow:
    0 20px 25px -5px rgba(0, 0, 0, 0.3),
    0 8px 10px -6px rgba(0, 0, 0, 0.3);
  position: relative;
  overflow: hidden;
}

.hero-label {
  display: block;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.hero-value {
  font-family: var(--font-mono);
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--text-primary);
  display: flex;
  justify-content: center;
  align-items: baseline;
  gap: 0.5rem;
  word-break: break-word;
}

.hero-value .unit {
  font-size: clamp(1.25rem, 3vw, 2rem);
  color: var(--text-muted);
  font-weight: 500;
}

.hero-meta {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

.meta-divider {
  color: var(--text-muted);
}

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.metric-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease;
}

.metric-card:hover {
  border-color: rgba(56, 189, 248, 0.3);
  transform: translateY(-2px);
}

.card-header h2 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.metric-list {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.metric-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.925rem;
}

.metric-row dt {
  color: var(--text-secondary);
}

.metric-row dd {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-primary);
}

.app-footer {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 0.5rem;
}