:root {
  --color-bg: #f6f4ef;
  --color-surface: #ffffff;
  --color-border: #e2ddd2;
  --color-border-strong: #c8c0b1;
  --color-ink: #221f1b;
  --color-ink-muted: #6f6a60;
  --color-ink-faint: #a59e90;

  --color-accent: #0f7a6c;
  --color-accent-hover: #0b5f54;
  --color-accent-soft: #e2f1ee;

  --color-quake: #b3401f;
  --color-quake-soft: #f8e7df;
  --color-aircraft: #3c5166;
  --color-aircraft-soft: #e7ecf1;
  --color-fire: #c2580c;
  --color-fire-soft: #fbe9dc;
  --color-unrest: #9a5b12;
  --color-unrest-soft: #f5ead9;

  --color-aqi-good: #2e7d32;
  --color-aqi-good-soft: #e7f3e8;
  --color-aqi-moderate: #a8800a;
  --color-aqi-moderate-soft: #f7f0d8;
  --color-aqi-unhealthy-sensitive: #b9601a;
  --color-aqi-unhealthy-sensitive-soft: #faead8;
  --color-aqi-unhealthy: #b9362a;
  --color-aqi-unhealthy-soft: #f8e3e0;
  --color-aqi-very-unhealthy: #7a3a96;
  --color-aqi-very-unhealthy-soft: #f0e5f4;
  --color-aqi-hazardous: #6b1f1a;
  --color-aqi-hazardous-soft: #f1dfdd;

  --font-heading: 'Space Grotesk', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: 'Source Sans 3', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;

  --radius-sm: 4px;
  --radius-md: 6px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.app-shell {
  max-width: 1240px;
  margin: 0 auto;
  padding: 28px 24px 60px;
}

/* ---------- Header ---------- */

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 20px;
  margin-bottom: 20px;
}

.app-header__title h1 {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 6px;
}

.app-header__subtitle {
  margin: 0;
  color: var(--color-ink-muted);
  font-size: 14px;
  max-width: 48ch;
}

.app-header__location {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}

.app-header__location-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.locality-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--color-ink-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 5px 10px;
}

.locality-badge .icon {
  color: var(--color-accent);
  flex-shrink: 0;
}

.link-button {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--color-ink-muted);
  background: none;
  border: none;
  padding: 4px 0;
  cursor: pointer;
  text-decoration: underline;
  text-decoration-color: var(--color-border-strong);
  transition: color 140ms var(--ease-out), text-decoration-color 140ms var(--ease-out);
}

.link-button:hover {
  color: var(--color-accent-hover);
  text-decoration-color: var(--color-accent-hover);
}

.link-button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ---------- Buttons ---------- */

.btn {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  padding: 10px 18px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background-color 160ms var(--ease-out), border-color 160ms var(--ease-out),
    color 160ms var(--ease-out), opacity 160ms var(--ease-out);
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.btn--primary:hover:not(:disabled) {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.btn--primary:active:not(:disabled) {
  background: #094840;
  border-color: #094840;
}

.btn--secondary {
  background: var(--color-surface);
  color: var(--color-ink);
  border-color: var(--color-border-strong);
}

.btn--secondary:hover:not(:disabled) {
  border-color: var(--color-accent-hover);
  color: var(--color-accent-hover);
}

.btn--secondary:active:not(:disabled) {
  background: var(--color-accent-soft);
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.icon-spin {
  animation: spin 0.9s linear infinite;
}

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

/* ---------- Intro / permission state ---------- */

.intro {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  max-width: 560px;
  margin: 40px auto;
  text-align: center;
}

.intro h2 {
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: 700;
  margin: 0 0 10px;
}

.intro p {
  color: var(--color-ink-muted);
  font-size: 14px;
  margin: 0 0 20px;
}

.intro[hidden],
.manual-location[hidden],
.dashboard[hidden] {
  display: none;
}

.intro-error {
  color: var(--color-quake);
  font-size: 13px;
  margin-top: 14px;
  min-height: 1em;
}

/* ---------- Manual location form ---------- */

.manual-location {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  max-width: 560px;
  margin: 0 auto 24px;
}

.manual-location p {
  margin: 0 0 14px;
  font-size: 13.5px;
  color: var(--color-ink-muted);
}

.manual-location__fields {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: flex-end;
}

.manual-location__field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  min-width: 120px;
}

.manual-location__field label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ink-faint);
}

.manual-location__field input {
  font-family: var(--font-mono);
  font-size: 14px;
  padding: 9px 10px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-ink);
}

.manual-location__field input:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

/* ---------- Dashboard layout ---------- */

.dashboard {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 20px;
  align-items: start;
}

@media (max-width: 920px) {
  .dashboard {
    grid-template-columns: 1fr;
  }
}

/* ---------- Map section ---------- */

.map-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.layer-toggles {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.layer-toggle {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 13px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface);
  color: var(--color-ink-muted);
  cursor: pointer;
  transition: background-color 140ms var(--ease-out), border-color 140ms var(--ease-out),
    color 140ms var(--ease-out), opacity 140ms var(--ease-out);
}

.layer-toggle .icon {
  flex-shrink: 0;
}

.layer-toggle:hover {
  border-color: var(--color-ink-faint);
  color: var(--color-ink);
}

.layer-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.layer-toggle[aria-pressed='true'] {
  background: var(--color-ink);
  border-color: var(--color-ink);
  color: #fff;
}

.layer-toggle[aria-pressed='true']:hover {
  background: #3a352e;
  border-color: #3a352e;
}

.layer-toggle[aria-pressed='true'][data-layer='earthquakes'] { background: #b3401f; border-color: #b3401f; }
.layer-toggle[aria-pressed='true'][data-layer='earthquakes']:hover { background: #8f3018; border-color: #8f3018; }
.layer-toggle[aria-pressed='true'][data-layer='aircraft'] { background: #3c5166; border-color: #3c5166; }
.layer-toggle[aria-pressed='true'][data-layer='aircraft']:hover { background: #2e3f50; border-color: #2e3f50; }
.layer-toggle[aria-pressed='true'][data-layer='wildfires'] { background: #c2580c; border-color: #c2580c; }
.layer-toggle[aria-pressed='true'][data-layer='wildfires']:hover { background: #9e4509; border-color: #9e4509; }
.layer-toggle[aria-pressed='true'][data-layer='unrest'] { background: #9a5b12; border-color: #9a5b12; }
.layer-toggle[aria-pressed='true'][data-layer='unrest']:hover { background: #7a480e; border-color: #7a480e; }
.layer-toggle[aria-pressed='true'][data-layer='airquality'] { background: #2e7d32; border-color: #2e7d32; }
.layer-toggle[aria-pressed='true'][data-layer='airquality']:hover { background: #236127; border-color: #236127; }

.layer-toggle:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.layer-toggle__count {
  font-variant-numeric: tabular-nums;
  color: var(--color-ink-faint);
}

.layer-toggle[aria-pressed='true'] .layer-toggle__count {
  color: rgba(255, 255, 255, 0.7);
}

.map {
  height: 560px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-border);
  position: relative;
  overflow: hidden;
}

.map .leaflet-control-attribution {
  font-size: 11px;
  background: rgba(255, 255, 255, 0.85);
}

.map-skeleton {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  color: var(--color-ink-faint);
  font-size: 13px;
  z-index: 1000;
  transition: opacity 200ms var(--ease-out);
}

.map-skeleton[hidden] {
  display: none;
}

/* ---------- Side panels ---------- */

.side-panels {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
}

.panel h2 {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 14px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Skeleton loaders */

.skeleton-line {
  height: 14px;
  border-radius: var(--radius-sm);
  background: linear-gradient(90deg, var(--color-border) 25%, #f0ece3 37%, var(--color-border) 63%);
  background-size: 400% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
  margin-bottom: 8px;
}

.skeleton-line:last-child {
  margin-bottom: 0;
}

.skeleton-line--short {
  width: 55%;
}

@keyframes shimmer {
  0% {
    background-position: 100% 0;
  }
  100% {
    background-position: -100% 0;
  }
}

/* Weather panel */

.weather-now {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 14px;
}

.weather-icon {
  flex-shrink: 0;
  color: var(--color-accent);
}

.weather-temp {
  font-family: var(--font-heading);
  font-size: 38px;
  font-weight: 700;
  line-height: 1;
}

.weather-condition {
  font-size: 13.5px;
  color: var(--color-ink-muted);
  margin-top: 2px;
}

.weather-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 16px;
  font-size: 13px;
  color: var(--color-ink-muted);
}

.weather-meta dt {
  color: var(--color-ink-faint);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0;
}

.weather-meta dd {
  margin: 0 0 6px;
}

.aqi-row {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.aqi-label {
  font-size: 13px;
  color: var(--color-ink-muted);
}

.aqi-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.aqi-badge--good {
  background: var(--color-aqi-good-soft);
  color: var(--color-aqi-good);
}

.aqi-badge--moderate {
  background: var(--color-aqi-moderate-soft);
  color: var(--color-aqi-moderate);
}

.aqi-badge--unhealthy-sensitive {
  background: var(--color-aqi-unhealthy-sensitive-soft);
  color: var(--color-aqi-unhealthy-sensitive);
}

.aqi-badge--unhealthy {
  background: var(--color-aqi-unhealthy-soft);
  color: var(--color-aqi-unhealthy);
}

.aqi-badge--very-unhealthy {
  background: var(--color-aqi-very-unhealthy-soft);
  color: var(--color-aqi-very-unhealthy);
}

.aqi-badge--hazardous {
  background: var(--color-aqi-hazardous-soft);
  color: var(--color-aqi-hazardous);
}

.panel-empty {
  font-size: 13.5px;
  color: var(--color-ink-faint);
  font-style: italic;
  margin: 0;
}

.panel-subhead {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
  margin: 18px 0 10px;
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
}

.station-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.station-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.station-dist {
  font-size: 12px;
  color: var(--color-ink-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

/* News panel */

.news-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.news-item a {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--color-ink);
  text-decoration: none;
  line-height: 1.35;
  display: block;
}

.news-item a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

.news-item a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.news-item__meta {
  font-size: 11.5px;
  color: var(--color-ink-faint);
  margin-top: 3px;
}

/* Status panel */

.status-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 13px;
}

.status-row:last-child {
  border-bottom: none;
}

.status-row__name {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-ink);
}

.status-row__name .icon {
  color: var(--color-ink-faint);
  flex-shrink: 0;
}

.status-row__value {
  color: var(--color-ink-muted);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.status-row__value--empty {
  color: var(--color-ink-faint);
  font-style: italic;
}

/* ---------- Footer ---------- */

.app-footer {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  font-size: 12px;
  color: var(--color-ink-faint);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- Map marker popups ---------- */

.nm-popup {
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.4;
}

.nm-popup h3 {
  font-family: var(--font-heading);
  font-size: 13.5px;
  font-weight: 700;
  margin: 0 0 4px;
}

.nm-popup dl {
  margin: 6px 0 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px 8px;
}

.nm-popup dt {
  color: var(--color-ink-faint);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.nm-popup dd {
  margin: 0;
}

.nm-popup a {
  color: var(--color-accent);
}

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