:root {
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --accent-color: #2563eb;
  --accent-glow: rgba(37, 99, 235, 0.1);
  --border-color: #e2e8f0;
  --success-color: #10b981;
}

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

body {
  font-family: "Inter", sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  padding: 2rem;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

header {
  margin-bottom: 2rem;
  text-align: center;
}

h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-top: 0.5rem;
}

.card {
  background: var(--card-bg);
  border-radius: 16px;
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05),
    0 2px 4px -1px rgba(0, 0, 0, 0.03);
  padding: 1.5rem;
}

/* Grid Layout */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

/* Metric Cards */
.metric-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.metric-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.metric-card.highlight {
  border-color: var(--accent-color);
  background: linear-gradient(to bottom right, #ffffff, var(--accent-glow));
}

.metric-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.metric-value {
  font-size: 2.5rem;
  font-weight: 700;
  margin: 0.5rem 0;
  color: var(--text-primary);
}

.metric-card.highlight .metric-value {
  color: var(--accent-color);
}

.metric-sub {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Chart Section */
.chart-container {
  margin-bottom: 2rem;
  padding: 2rem;
}

.chart-header {
  margin-bottom: 1.5rem;
}

.chart-wrapper {
  position: relative;
  height: 400px;
  width: 100%;
}

/* Table Section */
.table-container h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.table-responsive {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th,
td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  font-weight: 600;
  color: var(--text-secondary);
  background-color: #f8fafc;
}

tr:last-child td {
  border-bottom: none;
}

/* Loading & Error States */
.hidden {
  display: none !important;
}

.loading-state,
.error-state {
  text-align: center;
  padding: 4rem;
  color: var(--text-secondary);
}

.spinner {
  border: 4px solid rgba(0, 0, 0, 0.1);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border-left-color: var(--accent-color);
  animation: spin 1s linear infinite;
  margin: 0 auto 1rem;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.error-detail {
  margin-top: 1rem;
  color: #ef4444;
  font-family: monospace;
  background: #fef2f2;
  padding: 1rem;
  border-radius: 8px;
  display: inline-block;
}