/* AQI HR — stilovi */

:root {
  --bg: #f5f7fa;
  --bg-card: #ffffff;
  --text: #1a1a2e;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --radius: 12px;
  --topbar-bg: #1a5276;
  --topbar-text: #ffffff;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1923;
    --bg-card: #1a2634;
    --text: #e8eaed;
    --text-muted: #9aa0a6;
    --border: #2d3748;
    --shadow: 0 1px 3px rgba(0,0,0,0.3);
    --topbar-bg: #0d3b5e;
  }
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Topbar */
.topbar {
  background: var(--topbar-bg);
  color: var(--topbar-text);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: 50%;
  box-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.brand h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand .tag {
  font-size: 0.7rem;
  opacity: 0.7;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Status bar */
.status-bar {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 6px 20px;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}

/* Main container */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 16px;
}

/* Selector bar */
.selector-bar {
  display: flex;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.selector-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
  min-width: 180px;
}

.selector-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.selector-dropdown {
  appearance: none;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 8px 32px 8px 12px;
  border-radius: 8px;
  font-family: var(--font);
  font-size: 0.85rem;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b7280' stroke-width='2' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

.selector-dropdown:focus {
  outline: 2px solid var(--topbar-bg);
  outline-offset: -1px;
}

/* Empty prompt */
.empty-prompt {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-muted);
}

.empty-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.empty-prompt p {
  font-size: 0.9rem;
  max-width: 360px;
  margin: 0 auto;
  line-height: 1.5;
}

/* View toggle */
.view-toggle {
  display: flex;
  gap: 4px;
  padding: 8px 16px;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 12px;
}

.view-toggle-btn {
  flex: 1;
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 6px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.82rem;
  font-weight: 500;
  transition: all 0.15s;
}

.view-toggle-btn:hover { background: var(--border); }

.view-toggle-btn.active {
  background: var(--topbar-bg);
  color: #fff;
  border-color: var(--topbar-bg);
}

/* Chart */
.chart-wrap {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  margin-bottom: 12px;
}

.chart-header {
  margin-bottom: 12px;
}

.chart-title {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 8px;
}

.chart-poll-select {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.chart-container {
  position: relative;
  height: 300px;
}

/* Pollutant filter */
.poll-filter {
  display: flex;
  gap: 6px;
  padding: 10px 16px;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.poll-filter-btn {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 16px;
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.78rem;
  font-weight: 500;
  transition: all 0.15s;
}

.poll-filter-btn:hover { background: var(--border); }

.poll-filter-btn.active {
  background: var(--topbar-bg);
  color: #fff;
  border-color: var(--topbar-bg);
}

/* Dual gauge layout */
.dual-gauge {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}

.gauge-half {
  flex: 1;
  min-width: 0;
}

.gauge-title {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-align: center;
  margin-bottom: 4px;
}

/* Gauge (speedometer) */
.gauge-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 12px 12px;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.gauge-info {
  margin-bottom: 12px;
  padding: 12px 20px;
}

.gauge-svg {
  width: 200px;
  height: 120px;
}

.gauge-station {
  font-weight: 600;
  font-size: 1rem;
}

.gauge-rec {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 4px;
  max-width: 400px;
  line-height: 1.4;
}

/* Pollutant detail cards */
.poll-details-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 12px;
  overflow: hidden;
}

.poll-detail {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.poll-detail:last-child {
  border-bottom: none;
}

.poll-detail-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.poll-detail-name {
  font-weight: 600;
  font-size: 0.9rem;
}

.poll-detail-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.poll-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.poll-stat-label {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.poll-stat-val {
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
}

.poll-stat-val small {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.7rem;
}

.poll-stat-time {
  font-size: 0.65rem;
  color: var(--text-muted);
}

/* Distribution table */
.dist-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 16px;
  margin-bottom: 12px;
}

.dist-title {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}

.dist-tbl-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.dist-tbl {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
}

.dist-tbl th {
  padding: 6px 8px;
  text-align: center;
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.dist-tbl th:first-child,
.dist-tbl td:first-child {
  position: sticky;
  left: 0;
  background: var(--bg-card);
  z-index: 1;
}

.dist-tbl td {
  padding: 8px;
  border-bottom: 1px solid var(--border);
}

.dist-tbl tbody tr:last-child td {
  border-bottom: none;
}

.dist-poll {
  font-weight: 600;
  font-size: 0.82rem;
  white-space: nowrap;
}

.dist-cell {
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.dist-num {
  font-weight: 700;
  font-size: 0.85rem;
}

.dist-zero {
  color: var(--text-muted);
  opacity: 0.4;
}

.dist-total {
  font-weight: 600;
  color: var(--text-muted);
}

/* Loading */
.loading {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--topbar-bg);
  border-radius: 50%;
  margin: 0 auto 16px;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Error */
.error-box {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  box-shadow: var(--shadow);
}

.error-box h3 {
  margin-bottom: 8px;
  color: #ff4444;
}

.error-box p {
  color: var(--text-muted);
  margin-bottom: 8px;
  font-size: 0.9rem;
}

.retry-btn {
  background: var(--topbar-bg);
  color: #fff;
  border: none;
  padding: 8px 20px;
  border-radius: 8px;
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.85rem;
  margin-top: 8px;
}

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

/* Info section */
.info-section {
  margin-top: 24px;
  padding: 20px;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.info-section h2 {
  font-size: 1rem;
  margin-bottom: 12px;
}

.thresh-tbl-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.thresh-tbl {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.thresh-tbl thead { position: sticky; top: 0; }

.thresh-tbl th, .thresh-tbl td {
  padding: 8px 10px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.thresh-tbl th {
  background: var(--bg);
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.thresh-tbl td:first-child {
  text-align: left;
  white-space: nowrap;
}

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

.bar-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
}

.thresh-unit {
  margin-top: 8px;
  font-size: 0.7rem;
  color: var(--text-muted);
}

.info-section p {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-muted);
}

.info-section p + p {
  margin-top: 8px;
}

/* Footer */
.footer {
  text-align: center;
  padding: 20px;
  font-size: 0.7rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.footer a {
  color: var(--text-muted);
  text-decoration: underline;
}

/* Disclaimer */
.disclaimer {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-top: 16px;
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
  box-shadow: var(--shadow);
  border-left: 3px solid #ffd700;
}

.disclaimer a {
  color: var(--text);
  text-decoration: underline;
}