/* globe.gl's scene (its canvas and the markers it lays over it) is one layer of its own. The markers' renderer stacks
   them by depth with z-indexes, which would otherwise rise over the date and the other text drawn on the globe. */
.globe-view .scene-container {
  isolation: isolate;
}

/* Turns the Blue Marble texture into a muted dark map: lighter land on a deep sea. */
.globe-view[data-theme='satellite'] canvas {
  filter: grayscale(0.85) brightness(0.85) contrast(1.15);
}

/* The year and the porthole of SVS 5235 over the globe (sea-level-overlay.js). The round label clips it. The year is
   white with a thin black outline, so it shows on white ice, the map and the water alike; the stroke is painted
   under the fill, so half of it shows as the outline. */
.sea-overlay {
  --outline: 1px;
  position: absolute;
  inset: 0;
  pointer-events: none;
  text-align: center;
  color: #fff;
  -webkit-text-stroke: calc(2 * var(--outline)) #000;
  paint-order: stroke fill;
}

.sea-overlay[hidden] {
  display: none;
}

.sea-overlay-year {
  position: absolute;
  top: 9%;
  left: 0;
  right: 0;
  margin: 0;
  font-size: clamp(18px, 3.2vw, 44px);
  font-weight: 700;
  letter-spacing: 0.08em;
}

/* The sea seen through the porthole: as tall as the label, moved down (sea-level-overlay.js) so its top is half a
   wave above the water level. Everything in it moves by transforms only, so the compositor moves it without
   repainting. */
.sea-overlay-sea {
  --drift-sec: 6s;
  position: absolute;
  inset: 0;
  will-change: transform;
}

/* Carries the water's wave along, one wave in each drift; a wave wider than the label, so the shape always covers it. */
.sea-overlay-drift {
  position: absolute;
  top: 0;
  left: 0;
  width: calc(100% + var(--wave-w));
  height: 100%;
  animation: sea-overlay-drift var(--drift-sec) linear infinite;
}

/* Moves back exactly as far as the drift, so what it holds stays where it is. */
.sea-overlay-hold {
  position: absolute;
  inset: 0;
  animation: sea-overlay-hold var(--drift-sec) linear infinite;
}

/* Water: one shape, the wave along its top and solid below (waterMask), so the wave and the water under it are one
   body of one colour. */
.sea-overlay-water {
  position: absolute;
  inset: 0;
  mask-image: var(--water-mask);
  mask-size: var(--wave-w) 100%;
  mask-repeat: repeat-x;
}

/* Bright under the surface, deep blue below, stretched over the depth seen from the top of the wave to the bottom of
   the label. */
.sea-overlay-depth {
  position: absolute;
  inset: 0;
  transform-origin: top;
  background: linear-gradient(to bottom, rgb(40 205 255 / 0.5) 0%, rgb(25 125 220 / 0.55) 35%, rgb(12 45 105 / 0.75) 100%);
}

/* Only the sky above the water's wave, so the swell shows behind the surface and never through the water. */
.sea-overlay-swell-clip {
  position: absolute;
  top: calc(-1 * var(--swell-top));
  left: 0;
  right: 0;
  height: calc(var(--swell-top) + var(--wave-h));
  mask-image: var(--above-mask);
  mask-size: var(--above-mask-w) 100%;
  mask-repeat: no-repeat;
}

/* A paler swell behind the surface, moving the other way; it fades out downwards, so it leaves no edge. */
.sea-overlay-swell {
  position: absolute;
  top: 0;
  left: 0;
  width: calc(100% + var(--swell-w));
  height: calc(var(--swell-h) * 2.5);
  background: rgb(150 225 255 / 0.4);
  mask-image: var(--swell-mask), linear-gradient(#000, transparent);
  mask-size: var(--swell-mask-w) var(--swell-h), 100% 100%;
  mask-position: 0 0, 0 0;
  mask-repeat: no-repeat, no-repeat;
  mask-composite: intersect;
  animation: sea-overlay-swell 9s linear infinite;
}

@keyframes sea-overlay-drift {
  to {
    transform: translateX(calc(-1 * var(--wave-w)));
  }
}

@keyframes sea-overlay-hold {
  to {
    transform: translateX(var(--wave-w));
  }
}

@keyframes sea-overlay-swell {
  from {
    transform: translateX(calc(-1 * var(--swell-w)));
  }

  to {
    transform: none;
  }
}

/* Faint light rays, fading out over the depth seen; the fade is stretched with the water (sea-level-overlay.js) and
   the rays are stretched back, so they keep their slant. */
.sea-overlay-rays-fade {
  position: absolute;
  inset: 0;
  transform-origin: top;
  mask-image: linear-gradient(to bottom, #000, transparent 80%);
}

.sea-overlay-rays {
  position: absolute;
  top: 0;
  left: 0;
  width: calc(100% - var(--wave-w));
  height: 100%;
  transform-origin: top;
  background: repeating-linear-gradient(105deg, rgb(255 255 255 / 0) 0 7%, rgb(255 255 255 / 0.07) 9%, rgb(255 255 255 / 0) 12%);
}

@media (prefers-reduced-motion: reduce) {
  .sea-overlay-drift,
  .sea-overlay-hold,
  .sea-overlay-swell {
    animation: none;
  }
}

/* Falling pieces of lost ice (ice-fall.js), between the globe and the porthole water. */
.ice-fall {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* A bird seen from above (birds-layer.js), outlined in near-black and filled in its track's colour. */
.bird svg {
  display: block;
  overflow: visible;
}

.bird-outline {
  fill: #111;
  stroke: #111;
  stroke-width: 1.1;
  stroke-linejoin: round;
}

.bird-fill {
  fill: currentColor;
}

/* Each wing folds toward its root and sweeps its tip back on the upstroke. */
.bird-wing {
  transform-origin: 1.4px -1px;
  animation: bird-flap 0.4s ease-in-out infinite alternate;
  animation-delay: var(--flap-delay, 0s);
}

@keyframes bird-flap {
  from { transform: none; }
  to { transform: scale(0.35, 0.9) rotate(22deg); }
}

/* A storm of a season (storms-layer.js): its sign turns counterclockwise (mirrored south of the equator), its name
   stays upright. */
.season-storm svg {
  display: block;
  overflow: visible;
}

.season-storm-sign {
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  animation: season-storm-turn 1.6s linear infinite;
}

.season-storm-sign circle {
  fill: #111;
}

@keyframes season-storm-turn {
  to { transform: rotate(-360deg); }
}

.season-storm-name {
  font-size: 10px;
  font-weight: 700;
  fill: #fff;
  stroke: #111;
  stroke-width: 3px;
  stroke-linejoin: round;
  paint-order: stroke;
}

/* A city under the smog (smog-layer.js): a dot and its name above it. */
.smog-city svg {
  display: block;
  overflow: visible;
  filter: drop-shadow(0 0 3px var(--air, #000)) drop-shadow(0 1px 5px var(--air, #000));
}

.smog-city-dot {
  fill: #fff;
  stroke: #111;
  stroke-width: 1;
}

.smog-city-name {
  text-anchor: middle;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.03em;
  fill: #fff;
}

/* The date at 6 o'clock on the globe (date-label.js), sized with the globe. */
.globe-view {
  container-type: size;
}

.globe-date {
  position: absolute;
  left: 50%;
  top: 90%;
  z-index: 1;
  transform: translate(-50%, -50%);
  font-size: 4.5cqw;
  letter-spacing: 0.04em;
  white-space: nowrap;
  color: var(--ink);
  text-shadow: 0 1px 3px rgb(0 0 0 / 0.9);
  pointer-events: none;
  -webkit-user-select: text;
  user-select: text;
}

.globe-date-digit {
  display: inline-block;
  width: 0.62em;
  text-align: center;
}

/* A hurricane's wind, just below the storm (storm-view.js), sized with the globe. */
.storm-label {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.15em 0.5em;
  border-radius: 0.5em;
  background: rgb(0 0 0 / 0.45);
  font-size: 3.2cqw;
  line-height: 1.2;
  white-space: nowrap;
  text-shadow: 0 1px 3px rgb(0 0 0 / 0.9);
  font-variant-numeric: tabular-nums;
  pointer-events: none;
  will-change: transform;
}

.storm-label[hidden] {
  display: none;
}

.storm-wind {
  transition: color 0.6s ease;
}

.wildfire-overlay {
  position: absolute;
  left: 50%;
  top: 12%;
  z-index: 1;
  transform: translateX(-50%);
  text-align: center;
  color: var(--ink);
  text-shadow: 0 1px 3px rgb(0 0 0 / 0.9);
  pointer-events: none;
  max-width: 80%;
}

.wildfire-overlay-title {
  font-size: 4.2cqw;
  letter-spacing: 0.03em;
  white-space: nowrap;
  -webkit-user-select: text;
  user-select: text;
}

.wildfire-overlay-detail {
  margin-top: 0.35em;
  font-size: 2.8cqw;
  opacity: 0.9;
  -webkit-user-select: text;
  user-select: text;
}