/* Defines visual transitions and animations. */

@keyframes space-glow {
  0%,
  100% {
    box-shadow: var(--shadow-lg), 0 0 18px var(--color-glow-accent);
  }

  50% {
    box-shadow: var(--shadow-xl), 0 0 36px var(--color-glow-accent);
  }
}

@keyframes space-pulse {
  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.015);
  }
}

@keyframes space-float {
  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-0.5rem);
  }
}

@keyframes space-shimmer {
  0% {
    background-position: 200% 0;
  }

  100% {
    background-position: -200% 0;
  }
}

@keyframes space-fade-in {
  from {
    opacity: 0;
    transform: translateY(0.5rem);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes space-particle-rise {
  from {
    opacity: 0;
    transform: translate3d(0, 0.75rem, 0) scale(0.7);
  }

  25% {
    opacity: 1;
  }

  to {
    opacity: 0;
    transform: translate3d(0.75rem, -2.5rem, 0) scale(1.1);
  }
}

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

.animate-glow {
  animation: space-glow var(--duration-slower) var(--ease-emphasized) infinite;
}

.animate-pulse {
  animation: space-pulse var(--duration-slower) var(--ease-emphasized) infinite;
}

.animate-float {
  animation: space-float 3s var(--ease-emphasized) infinite;
}

.animate-fade-in {
  animation: space-fade-in var(--duration-normal) var(--ease-decelerate) both;
}

.animate-spin {
  animation: space-spin 1s linear infinite;
}

.shimmer {
  background: linear-gradient(90deg, var(--color-surface), var(--color-surface-elevated), var(--color-surface));
  background-size: 200% 100%;
  animation: space-shimmer 1.5s linear infinite;
}

.particle-field {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.particle {
  position: absolute;
  inset-block-end: 0;
  inline-size: 0.25rem;
  block-size: 0.25rem;
  border-radius: var(--radius-full);
  background-color: var(--color-accent);
  box-shadow: var(--glow-accent);
  animation: space-particle-rise 1.8s var(--ease-decelerate) infinite;
}

.particle:nth-child(2) {
  inset-inline-start: 20%;
  animation-delay: 300ms;
}

.particle:nth-child(3) {
  inset-inline-start: 50%;
  animation-delay: 700ms;
}

.particle:nth-child(4) {
  inset-inline-start: 78%;
  animation-delay: 1s;
}

.task-card.is-active {
  animation: space-glow var(--duration-slower) var(--ease-emphasized) infinite;
}

.task-card.is-active .task-timer {
  color: var(--color-accent);
  text-shadow: var(--glow-accent);
}

@keyframes space-orbit {
  to {
    transform: rotate(360deg);
  }
}

@keyframes space-breathe {
  0%,
  100% {
    box-shadow: inset 0 0 2.5rem rgb(33 230 208 / 8%), 0 0 2rem rgb(33 230 208 / 8%);
    opacity: 0.72;
  }

  50% {
    box-shadow: inset 0 0 4rem rgb(33 230 208 / 24%), 0 0 4rem rgb(33 230 208 / 25%);
    opacity: 1;
  }
}

@keyframes space-beam-flow {
  from {
    transform: translate(-50%, 100%);
  }

  to {
    transform: translate(-50%, -500%);
  }
}

@keyframes space-star-drift {
  from {
    background-position: 0 0, 7rem 11rem;
  }

  to {
    background-position: 4rem -10rem, 2rem 1rem;
  }
}

@keyframes space-star-glide {
  from {
    background-position: 0 0, 0 0, 0 0, 0 0;
  }

  to {
    background-position: 2rem -3rem, -3rem 2rem, 1rem 4rem, -2rem -2rem;
  }
}

@keyframes space-aurora {
  0%,
  100% {
    opacity: 0.62;
    transform: scale(1.08) translateX(-2%);
  }

  50% {
    opacity: 1;
    transform: scale(1.12) translateX(2%);
  }
}

@keyframes space-energy-wave {
  from {
    opacity: 0.7;
    transform: scale(0.82);
  }

  to {
    opacity: 0;
    transform: scale(1.18);
  }
}

@keyframes space-core-breathe {
  0%,
  100% {
    opacity: 0.68;
    transform: scale(0.98);
  }

  50% {
    opacity: 1;
    transform: scale(1.035);
  }
}

@keyframes space-signal-orbit {
  from {
    transform: rotate(-18deg);
  }

  to {
    transform: rotate(342deg);
  }
}

@keyframes space-planet-breathe {
  0%,
  100% {
    filter: brightness(0.92);
    transform: scale(0.985);
  }

  50% {
    filter: brightness(1.08);
    transform: scale(1.015);
  }
}

.background-particles {
  animation: space-star-drift 28s linear infinite alternate;
}

.background-stars {
  animation: space-star-glide 42s linear infinite alternate;
}

.background-nebula {
  animation: space-aurora 18s var(--ease-emphasized) infinite;
}

.energy-core__stage::before {
  animation: space-core-breathe 8s var(--ease-emphasized) infinite;
}

.energy-core__ring--outer {
  animation: space-orbit 48s linear infinite;
}

.energy-core__ring--middle {
  animation: space-orbit 38s linear infinite reverse;
}

.empty-state__planet {
  animation: space-planet-breathe 7s var(--ease-emphasized) infinite;
}

.empty-state__signal {
  animation: space-signal-orbit 32s linear infinite;
}

.space-box:hover {
  animation: space-lift var(--duration-normal) var(--ease-emphasized) both;
}

.energy-core[data-session-state="running"] .energy-core__stage::after {
  position: absolute;
  z-index: -1;
  inline-size: 17rem;
  block-size: 17rem;
  border: 1px solid rgb(33 230 208 / 42%);
  border-radius: 50%;
  content: "";
  animation: space-energy-wave 4.8s var(--ease-decelerate) infinite;
}

@keyframes space-lift {
  to {
    transform: translateY(-0.25rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .background-stars,
  .background-particles,
  .background-nebula,
  .empty-state__planet,
  .empty-state__signal,
  .particle,
  .task-card.is-active,
  .space-box[data-task-state="running"] .space-box__orbit,
  .energy-core__ring,
  .energy-core__stage::before,
  .energy-core[data-session-state="running"] .energy-core__beam-signal,
  .energy-core[data-session-state="running"] .energy-core__stage::after {
    animation: none;
  }
}