/* ==========================================================================
   Fuzzy SG Modern Theme & Layout Styles
   ========================================================================== */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --border-color: #e2e8f0;
  --accent-color: #2563eb;
  
  /* Air Quality Colors */
  --status-good: #10b981;
  --status-moderate: #f59e0b;
  --status-unhealthy: #ef4444;
  --status-hazard: #8b5cf6;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --accent-color: #3b82f6;
  }
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.5;
  padding-bottom: 2rem;
}

.container {
  max-width: 1024px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header */
.site-header {
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem 0;
  margin-bottom: 1.5rem;
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.site-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

.nav-btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  background-color: var(--accent-color);
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  transition: opacity 0.2s ease;
}

.nav-btn:hover {
  opacity: 0.9;
}

/* Status Bar */
.status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--card-bg);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
}

.pulse-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--status-good);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.icon-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.875rem;
}

.icon-btn:hover { background-color: var(--border-color); }

/* Grid & Region Cards */
.region-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.region-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.region-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px dashed var(--border-color);
  padding-bottom: 0.5rem;
  margin-bottom: 0.25rem;
}

.region-name {
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
}

.quality-tag {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  color: #fff;
}

.stat-val {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
}
.stat-val strong { font-weight: 600; }

/* Panels & Charts */
.content-panel {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.content-panel h2 {
  font-size: 1.15rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.chart-container {
  position: relative;
  height: 350px;
  width: 100%;
}

/* Data Table */
.table-responsive {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.85rem;
}

.data-table th, .data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.data-table th {
  background-color: var(--bg-color);
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

#stats-body tr {
  background-color: var(--bg-color);
  font-weight: 600;
}

.data-table tbody tr:hover { background-color: var(--border-color); }

/* Info Section & Footer */
.info-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 1.25rem;
  border-radius: 8px;
  margin-bottom: 2rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}
.info-card h3 { color: var(--text-primary); margin-bottom: 0.5rem; }

.site-footer {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-secondary);
}
.site-footer a { color: var(--accent-color); text-decoration: none; }