* { box-sizing: border-box; }
html, body, #app {
  height: 100%;
  margin: 0;
  font-family: var(--font-sans);
  background: var(--surface-canvas);
  color: var(--text-primary);
}

#app { display: flex; flex-direction: column; }

.hidden { display: none !important; }

.micro-upper {
  font: var(--text-micro-upper);
  color: var(--text-tertiary);
  letter-spacing: var(--tracking-upper);
  text-transform: uppercase;
  white-space: nowrap;
}

/* ---------------- Toolbar ---------------- */

#toolbar {
  height: var(--toolbar-h);
  flex-shrink: 0;
  background: var(--surface-app);
  border-bottom: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 0 20px;
  overflow-x: auto;
  position: relative;
  z-index: 30;
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font: var(--text-title);
  font-weight: 800;
  color: var(--smoke-500);
  white-space: nowrap;
  flex-shrink: 0;
}
.brand img { height: 28px; border-radius: 6px; }

.divider {
  width: 1px;
  height: 26px;
  background: var(--border-hairline);
  flex-shrink: 0;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-shrink: 0;
}

.toolbar-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  padding-left: 20px;
  flex-shrink: 0;
}

/* Segmented control */
.segmented {
  display: inline-flex;
  gap: 4px;
  background: var(--surface-panel);
  padding: 4px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-hairline);
  flex-shrink: 0;
}
.seg {
  padding: 6px 14px;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  font: var(--text-small-medium);
  background: transparent;
  color: var(--text-secondary);
  transition: background var(--duration-fast) var(--ease-standard),
    color var(--duration-fast) var(--ease-standard);
}
.seg:hover { color: var(--text-primary); }
.seg.active { background: var(--surface-accent); color: var(--text-on-accent); }

/* Toggle */
.toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font: var(--text-body);
  color: var(--text-primary);
  white-space: nowrap;
}
.toggle input { position: absolute; opacity: 0; width: 0; height: 0; }
.toggle-box {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  display: inline-flex;
  flex-shrink: 0;
  background: transparent;
  border: 1px solid var(--border-strong);
  transition: background var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard);
}
.toggle input:checked + .toggle-box {
  background: var(--surface-accent);
  border-color: var(--surface-accent);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'%3E%3Cpath d='M1 5l3 3 5-6' stroke='%231a1206' stroke-width='1.6' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}
.toggle input:focus-visible + .toggle-box {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

/* Opacity slider group */
.opacity-group {
  display: flex;
  align-items: center;
  gap: 12px;
  white-space: nowrap;
  transition: opacity var(--duration-base) var(--ease-standard);
}
.opacity-group.disabled { opacity: 0.4; pointer-events: none; }
.opacity-val {
  font: var(--text-data-sm);
  color: var(--text-secondary);
  width: 40px;
  text-align: right;
}

/* Range slider */
.sw-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100px;
  height: 4px;
  border-radius: 2px;
  background: var(--ink-4);
  outline: none;
  cursor: pointer;
}
.sw-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--fog-1);
  border: 2px solid var(--smoke-500);
  cursor: pointer;
}
.sw-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--fog-1);
  border: 2px solid var(--smoke-500);
  cursor: pointer;
}

/* Live status (satellite) */
.live-status {
  display: flex;
  align-items: center;
  gap: 10px;
  font: var(--text-data-sm);
  color: var(--text-secondary);
  white-space: nowrap;
}
.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--aqi-good);
  box-shadow: 0 0 8px var(--aqi-good);
}

/* Buttons */
.btn-ghost,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font: var(--text-small-medium);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard),
    color var(--duration-fast) var(--ease-standard);
  white-space: nowrap;
}
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid transparent;
}
.btn-ghost:hover { color: var(--text-primary); }
.btn-secondary {
  background: var(--surface-panel-raised);
  color: var(--text-primary);
  border: 1px solid var(--border-hairline);
}
.btn-secondary:hover { border-color: var(--border-strong); }

.align-hint {
  font: var(--text-small);
  color: var(--text-secondary);
  white-space: nowrap;
}

/* Timezone select */
.sw-select {
  background: var(--surface-panel-raised);
  color: var(--text-primary);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font: var(--text-small-medium);
  cursor: pointer;
  max-width: 240px;
}

.tz-hint {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--surface-panel-raised);
  color: var(--smoke-500);
  font-size: 12px;
  cursor: help;
}

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

#map { flex: 1; position: relative; min-height: 0; }
.leaflet-container { background: var(--ink-0); }
.leaflet-control-attribution { display: none; }

/* Restyled Leaflet zoom control as icon buttons */
.leaflet-control-zoom { border: none !important; box-shadow: none !important; }
.leaflet-control-zoom a {
  width: 32px;
  height: 32px;
  line-height: 30px;
  background: var(--surface-panel-raised);
  color: var(--text-secondary);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-sm) !important;
  margin-bottom: 6px;
  font-size: 18px;
  transition: color var(--duration-fast) var(--ease-standard);
}
.leaflet-control-zoom a:hover {
  background: var(--surface-panel-raised);
  color: var(--text-primary);
}

.map-attribution {
  position: absolute;
  bottom: 4px;
  right: 8px;
  z-index: 10;
  font: var(--text-data-sm);
  color: rgba(255, 255, 255, 0.4);
}

/* ---------------- Timeline transport ---------------- */

.timeline {
  position: absolute;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  width: min(720px, calc(100% - 48px));
  background: var(--surface-panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-float);
  padding: 14px 18px 16px;
  z-index: 1200;
  transition: opacity var(--duration-base) var(--ease-standard);
}
.timeline.disabled { opacity: 0.5; pointer-events: none; }

.tl-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 13px;
}
.tl-transport { display: flex; align-items: center; gap: 8px; }

.icon-btn {
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-panel-raised);
  color: var(--text-secondary);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-standard),
    color var(--duration-fast) var(--ease-standard);
}
.icon-btn:hover { color: var(--text-primary); }
.icon-btn-lg { width: 40px; height: 40px; }
.icon-btn.active {
  background: var(--surface-accent);
  color: var(--text-on-accent);
  border-color: var(--surface-accent);
}
.icon-btn.active:hover { color: var(--text-on-accent); }

.tl-time { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.tl-clock { font: var(--text-data-lg); color: var(--text-primary); white-space: nowrap; }

.tl-meta {
  margin-left: auto;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  text-align: right;
  min-width: 0;
}
.tl-source {
  font: var(--text-data-sm);
  color: var(--text-tertiary);
  white-space: nowrap;
}
.tl-source.older-forecast { color: var(--smoke-400); cursor: help; }
.tl-counter {
  font: var(--text-data-sm);
  color: var(--text-tertiary);
  white-space: nowrap;
}

.tl-track {
  position: relative;
  height: 34px;
  cursor: pointer;
  touch-action: none;
}
.tl-track-base {
  position: absolute;
  top: 7px;
  left: 0;
  right: 0;
  height: 4px;
  border-radius: 2px;
  background: var(--ink-4);
}
.tl-fill {
  position: absolute;
  top: 7px;
  left: 0;
  height: 4px;
  border-radius: 2px;
  background: var(--surface-accent);
}
.tl-tick {
  position: absolute;
  top: 4px;
  width: 1px;
  height: 10px;
  transform: translateX(-0.5px);
}
.tl-tick.past { background: var(--smoke-600); }
.tl-tick.future { background: var(--ink-5); }
.tl-playhead {
  position: absolute;
  top: 9px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--fog-1);
  border: 3px solid var(--smoke-500);
  transform: translate(-50%, -50%);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.5);
}
.tl-label {
  position: absolute;
  top: 19px;
  font: var(--text-data-sm);
  color: var(--text-tertiary);
  white-space: nowrap;
}
.tl-label.now { color: var(--smoke-400); }

/* Satellite alignment handles */
.align-handle {
  position: absolute;
  z-index: 500;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: #ff5252;
  border: 2px solid white;
  width: 16px;
  height: 16px;
  cursor: grab;
  touch-action: none;
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.6);
}

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