/* Phase 3: connected Loop composition and persistent-life story. */
#how-it-works {
  min-height: auto;
  padding-bottom: clamp(120px, 15vw, 210px);
}

#how-it-works .section-shell {
  position: relative;
  z-index: 2;
}

.loop-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 390px);
  align-items: end;
  gap: 26px;
  margin-bottom: clamp(38px, 5vw, 70px);
}

.loop-heading .eyebrow {
  grid-column: 1 / -1;
  margin-bottom: -12px;
}

.loop-heading .section-title {
  max-width: 720px;
  margin: 0;
}

.loop-intro {
  max-width: 39ch;
  margin: 0 0 5px;
  color: rgba(221, 250, 246, .68);
  font-size: 14px;
  line-height: 1.65;
}

.loop-system {
  position: relative;
  isolation: isolate;
  padding: 12px 0 0;
}

.loop-system .icon-grid {
  position: relative;
  z-index: 2;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(14px, 1.55vw, 24px);
}

.loop-current {
  position: absolute;
  z-index: 1;
  top: 8px;
  left: 1.5%;
  width: 97%;
  height: calc(100% + 46px);
  overflow: visible;
  pointer-events: none;
}

.loop-current path {
  fill: none;
  stroke: rgba(137, 239, 224, .22);
  stroke-width: 1.35;
  stroke-linecap: round;
  stroke-dasharray: 2 8;
  vector-effect: non-scaling-stroke;
}

.loop-current .loop-current-return {
  stroke: rgba(239, 199, 110, .18);
  stroke-dasharray: 1 9;
}

#how-it-works .icon-card {
  min-height: 300px;
  padding-top: 34px;
}

#how-it-works .icon-card:nth-child(even) {
  transform: translateY(22px);
}

#how-it-works .icon-card:nth-child(even):hover,
#how-it-works .icon-card:nth-child(even):focus-visible {
  transform: translateY(18px);
}

.loop-sequence {
  position: absolute;
  z-index: 4;
  top: 17px;
  right: 18px;
  color: rgba(169, 232, 222, .58);
  font: 700 8px/1 var(--font-mono);
  letter-spacing: .16em;
}

.loop-sequence::before {
  content: '';
  display: inline-block;
  width: 15px;
  height: 1px;
  margin: 0 8px 3px 0;
  background: currentColor;
}

.loop-preview {
  position: absolute;
  z-index: 2;
  top: 42px;
  right: 22px;
  width: 66px;
  height: 66px;
  overflow: hidden;
  border-radius: 50%;
  opacity: .48;
  pointer-events: none;
  transition: opacity 260ms var(--ease-standard), transform 420ms var(--ease-standard);
}

.icon-card:hover .loop-preview,
.icon-card:focus-visible .loop-preview {
  opacity: .88;
}

.loop-preview-hatch {
  display: grid;
  place-items: center;
  background: radial-gradient(circle, rgba(98, 232, 213, .08), transparent 67%);
}

.loop-preview-hatch i {
  width: 25px;
  height: 34px;
  border: 1px solid rgba(174, 255, 243, .42);
  border-radius: 52% 48% 49% 51% / 60% 60% 40% 40%;
  background: radial-gradient(circle at 38% 31%, rgba(238, 252, 248, .24), rgba(98, 232, 213, .08) 36%, rgba(3, 24, 35, .12) 74%);
  box-shadow: inset 0 0 13px rgba(98, 232, 213, .11);
}

.icon-card:hover .loop-preview-hatch i,
.icon-card:focus-visible .loop-preview-hatch i {
  animation: loop-egg-breath 1.8s ease-in-out infinite;
}

.loop-preview-raise {
  border-radius: 20px;
  background: linear-gradient(180deg, transparent, rgba(98, 232, 213, .055));
}

.loop-preview-raise::after {
  content: '';
  position: absolute;
  right: 8px;
  bottom: -8px;
  width: 42px;
  height: 40px;
  border-left: 1px solid rgba(98, 232, 213, .3);
  border-radius: 58% 0 0 0;
  transform: rotate(-18deg);
}

.loop-preview-raise i {
  position: absolute;
  bottom: 7px;
  width: 3px;
  height: 3px;
  border: 1px solid rgba(169, 232, 222, .54);
  border-radius: 50%;
}

.loop-preview-raise i:nth-child(1) { left: 13px; }
.loop-preview-raise i:nth-child(2) { left: 32px; bottom: 18px; width: 2px; height: 2px; }
.loop-preview-raise i:nth-child(3) { left: 49px; bottom: 10px; }

.icon-card:hover .loop-preview-raise i,
.icon-card:focus-visible .loop-preview-raise i {
  animation: loop-particle-rise 1.5s ease-out infinite;
}

.icon-card:hover .loop-preview-raise i:nth-child(2),
.icon-card:focus-visible .loop-preview-raise i:nth-child(2) { animation-delay: 220ms; }
.icon-card:hover .loop-preview-raise i:nth-child(3),
.icon-card:focus-visible .loop-preview-raise i:nth-child(3) { animation-delay: 460ms; }

.loop-preview-breed {
  border-radius: 18px;
}

.loop-preview-breed i {
  position: absolute;
  top: 18px;
  width: 35px;
  height: 28px;
  border-top: 1px solid rgba(121, 232, 218, .45);
  border-radius: 50%;
  transition: transform 500ms var(--ease-standard);
}

.loop-preview-breed i:first-child {
  left: -4px;
  transform: rotate(22deg) translateX(-4px);
}

.loop-preview-breed i:nth-child(2) {
  right: -4px;
  transform: rotate(-22deg) translateX(4px);
}

.loop-preview-breed b {
  position: absolute;
  top: 28px;
  left: 31px;
  width: 5px;
  height: 5px;
  border: 1px solid rgba(238, 252, 248, .5);
  border-radius: 50%;
  opacity: .45;
  transition: opacity 400ms var(--ease-standard), box-shadow 400ms var(--ease-standard);
}

.icon-card:hover .loop-preview-breed i:first-child,
.icon-card:focus-visible .loop-preview-breed i:first-child { transform: rotate(22deg) translateX(7px); }
.icon-card:hover .loop-preview-breed i:nth-child(2),
.icon-card:focus-visible .loop-preview-breed i:nth-child(2) { transform: rotate(-22deg) translateX(-7px); }
.icon-card:hover .loop-preview-breed b,
.icon-card:focus-visible .loop-preview-breed b {
  opacity: .9;
  box-shadow: 0 0 10px rgba(98, 232, 213, .32);
}

.loop-preview-trade {
  border-radius: 18px;
}

.loop-preview-trade::before,
.loop-preview-trade::after {
  content: '';
  position: absolute;
  left: 11px;
  width: 44px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(239, 199, 110, .5), transparent);
}

.loop-preview-trade::before { top: 22px; }
.loop-preview-trade::after { top: 43px; }

.loop-preview-trade i {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  transition: transform 520ms var(--ease-standard);
}

.loop-preview-trade i:first-child {
  top: 19px;
  left: 14px;
  background: rgba(98, 232, 213, .72);
}

.loop-preview-trade i:nth-child(2) {
  top: 40px;
  right: 14px;
  background: rgba(239, 199, 110, .72);
}

.loop-preview-trade b {
  position: absolute;
  top: 25px;
  left: 28px;
  width: 10px;
  height: 16px;
  border: 1px solid rgba(238, 252, 248, .25);
  border-width: 0 1px;
  transform: rotate(24deg);
  transition: transform 520ms var(--ease-standard);
}

.icon-card:hover .loop-preview-trade i:first-child,
.icon-card:focus-visible .loop-preview-trade i:first-child { transform: translate(29px, 21px); }
.icon-card:hover .loop-preview-trade i:nth-child(2),
.icon-card:focus-visible .loop-preview-trade i:nth-child(2) { transform: translate(-29px, -21px); }
.icon-card:hover .loop-preview-trade b,
.icon-card:focus-visible .loop-preview-trade b { transform: rotate(-24deg); }

.loop-return {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  max-width: 520px;
  margin: 64px 2% 0 auto;
  color: rgba(239, 219, 157, .7);
  font: 700 8px/1.5 var(--font-mono);
  letter-spacing: .12em;
  text-align: right;
  text-transform: uppercase;
}

.loop-return span {
  width: 46px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(239, 199, 110, .48));
}

#persistent-life {
  position: relative;
  min-height: auto;
  padding-block: clamp(120px, 13vw, 200px);
  overflow: hidden;
  background:
    radial-gradient(circle at 74% 38%, rgba(98, 232, 213, .055), transparent 26%),
    radial-gradient(circle at 16% 76%, rgba(169, 232, 222, .025) 0 1px, transparent 1.5px) 0 0 / 127px 143px,
    linear-gradient(180deg, var(--water-twilight-entry, #062330) 0%, #05202d 52%, var(--water-twilight-entry, #062330) 100%);
}

#persistent-life::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(112deg, transparent 0 57%, rgba(169, 232, 222, .025) 57% 57.1%, transparent 57.1%);
}

.persistent-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, .88fr) minmax(480px, 1.12fr);
  align-items: center;
  gap: clamp(54px, 8vw, 126px);
}

.persistent-copy {
  max-width: 610px;
}

.persistent-copy .section-title {
  max-width: 600px;
  margin-bottom: 28px;
}

.persistent-lede {
  max-width: 53ch;
  color: rgba(221, 250, 246, .72);
  font-size: clamp(15px, 1.25vw, 18px);
  line-height: 1.75;
}

.persistent-truth {
  margin: 28px 0 0;
  color: var(--foam);
  font: italic clamp(21px, 2vw, 30px)/1.25 var(--font-display);
}

.persistent-action {
  min-height: 44px;
  margin-top: 34px;
  padding: 0 0 6px;
  border: 0;
  border-bottom: 1px solid rgba(98, 232, 213, .42);
  border-radius: 0;
  background: transparent;
  color: rgba(196, 255, 245, .86);
  font: 700 9px/1 var(--font-mono);
  letter-spacing: .14em;
  text-transform: uppercase;
  transition: color var(--motion-fast) var(--ease-standard), border-color var(--motion-fast) var(--ease-standard);
}

.persistent-action span {
  display: inline-block;
  margin-left: 8px;
  transition: transform var(--motion-fast) var(--ease-standard);
}

.persistent-action:hover,
.persistent-action:focus-visible {
  border-color: var(--aqua);
  color: var(--foam);
}

.persistent-action:hover span,
.persistent-action:focus-visible span { transform: translateX(4px); }

.persistent-action:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 7px;
}

.life-diagram {
  position: relative;
  padding: clamp(28px, 3.2vw, 48px);
  border-top: 1px solid rgba(169, 232, 222, .23);
  border-bottom: 1px solid rgba(169, 232, 222, .13);
  background: linear-gradient(108deg, rgba(3, 25, 37, .18), rgba(3, 25, 37, .04));
}

.life-diagram::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 78px;
  height: 1px;
  background: var(--aqua);
  box-shadow: 0 0 18px rgba(98, 232, 213, .2);
}

.life-diagram-head {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  align-items: start;
  gap: 22px;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(169, 232, 222, .12);
}

.life-diagram-head .eyebrow {
  margin: 6px 0 0;
}

.life-diagram-head h3 {
  max-width: 450px;
  margin: 0;
  color: var(--foam);
  font: clamp(24px, 2.4vw, 36px)/1.08 var(--font-display);
}

.life-system {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 0;
  padding: 18px 0 0;
  list-style: none;
}

.life-system::before {
  content: '';
  position: absolute;
  top: 50%;
  right: 0;
  left: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(169, 232, 222, .15) 10% 90%, transparent);
}

.life-system::after {
  content: '';
  position: absolute;
  top: 18px;
  bottom: 0;
  left: 50%;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(169, 232, 222, .15) 10% 90%, transparent);
}

.life-system li {
  position: relative;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 13px;
  min-height: 128px;
  padding: 25px 18px;
}

.life-index {
  color: rgba(169, 232, 222, .48);
  font: 700 8px/1.2 var(--font-mono);
  letter-spacing: .12em;
}

.life-system strong {
  display: block;
  margin-bottom: 8px;
  color: var(--foam);
  font: clamp(22px, 2vw, 29px)/1 var(--font-display);
}

.life-system p {
  max-width: 24ch;
  margin: 0;
  color: rgba(221, 250, 246, .64);
  font-size: 12px;
  line-height: 1.55;
}

.life-continuum {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 24px 0 0;
  color: rgba(169, 232, 222, .58);
  font: 700 8px/1.5 var(--font-mono);
  letter-spacing: .1em;
  text-transform: uppercase;
}

.life-continuum span {
  flex: 0 0 34px;
  height: 1px;
  background: rgba(98, 232, 213, .4);
}

@keyframes loop-egg-breath {
  0%, 100% { box-shadow: inset 0 0 13px rgba(98, 232, 213, .11), 0 0 0 rgba(98, 232, 213, 0); filter: brightness(1); }
  50% { box-shadow: inset 0 0 18px rgba(98, 232, 213, .24), 0 0 13px rgba(98, 232, 213, .13); filter: brightness(1.12); }
}

@keyframes loop-particle-rise {
  0% { opacity: .12; transform: translateY(4px); }
  45% { opacity: .75; }
  100% { opacity: 0; transform: translateY(-38px); }
}

@media (max-width: 1023px) {
  .loop-heading {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .loop-heading .eyebrow { margin-bottom: -6px; }
  .loop-intro { max-width: 56ch; }
  .loop-current { display: none; }
  .loop-system .icon-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  #how-it-works .icon-card:nth-child(even),
  #how-it-works .icon-card:nth-child(even):hover,
  #how-it-works .icon-card:nth-child(even):focus-visible { transform: none; }
  .loop-return { margin-top: 32px; }

  .persistent-shell {
    grid-template-columns: 1fr;
    gap: 64px;
  }

  .persistent-copy { max-width: 720px; }
  .persistent-lede { max-width: 62ch; }
}

@media (max-width: 620px) {
  #how-it-works {
    padding-bottom: 110px;
  }

  .loop-heading {
    margin-bottom: 30px;
  }

  .loop-intro {
    font-size: 13px;
  }

  #how-it-works .icon-card {
    min-height: 220px;
  }

  .loop-preview {
    top: 31px;
    right: 12px;
    width: 54px;
    height: 54px;
    opacity: .42;
  }

  .loop-sequence {
    top: 15px;
    right: 13px;
    font-size: 7px;
  }

  .loop-return {
    justify-content: flex-start;
    margin: 28px 0 0;
    text-align: left;
  }

  #persistent-life {
    padding-block: 108px;
  }

  .persistent-shell {
    gap: 52px;
  }

  .persistent-copy .section-title {
    margin-bottom: 22px;
  }

  .persistent-lede {
    font-size: 14px;
    line-height: 1.7;
  }

  .persistent-truth {
    margin-top: 23px;
    font-size: 24px;
  }

  .persistent-action {
    margin-top: 26px;
  }

  .life-diagram {
    padding: 27px 20px;
  }

  .life-diagram-head {
    grid-template-columns: 1fr;
    gap: 10px;
    padding-bottom: 22px;
  }

  .life-diagram-head .eyebrow { margin: 0; }
  .life-diagram-head h3 { font-size: 27px; }

  .life-system {
    grid-template-columns: 1fr;
    padding-top: 8px;
  }

  .life-system::before { display: none; }

  .life-system::after {
    top: 29px;
    bottom: 28px;
    left: 15px;
    background: linear-gradient(180deg, transparent, rgba(169, 232, 222, .18) 8% 92%, transparent);
  }

  .life-system li {
    grid-template-columns: 31px minmax(0, 1fr);
    min-height: 0;
    padding: 20px 4px;
  }

  .life-system strong { font-size: 25px; }
  .life-system p { font-size: 12px; }

  .life-continuum {
    align-items: flex-start;
    margin-top: 18px;
    font-size: 7px;
  }
}

@media (max-width: 460px) {
  .loop-system .icon-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  #how-it-works .icon-card {
    min-height: 214px;
    padding: 20px 18px 18px;
  }

  #how-it-works .icon-card h3 {
    margin-top: 13px;
    font-size: 28px;
  }

  #how-it-works .icon-card p {
    max-width: 26ch;
    font-size: 12px;
  }

  .loop-preview {
    top: 41px;
    right: 21px;
    width: 64px;
    height: 64px;
  }

  .loop-sequence {
    right: 20px;
  }
}

@media (hover: none), (pointer: coarse) {
  .loop-preview { opacity: .42; }
  .icon-card:hover .loop-preview-hatch i,
  .icon-card:focus-visible .loop-preview-hatch i,
  .icon-card:hover .loop-preview-raise i,
  .icon-card:focus-visible .loop-preview-raise i { animation: none; }
}

@media (prefers-reduced-motion: reduce) {
  .loop-preview,
  .loop-preview *,
  .persistent-action,
  .persistent-action span {
    animation: none !important;
    transition: none !important;
  }

  .icon-card:hover .loop-preview-breed i:first-child,
  .icon-card:focus-visible .loop-preview-breed i:first-child { transform: rotate(22deg); }
  .icon-card:hover .loop-preview-breed i:nth-child(2),
  .icon-card:focus-visible .loop-preview-breed i:nth-child(2) { transform: rotate(-22deg); }
  .icon-card:hover .loop-preview-trade i,
  .icon-card:focus-visible .loop-preview-trade i { transform: none; }
  .icon-card:hover .loop-preview-trade b,
  .icon-card:focus-visible .loop-preview-trade b { transform: rotate(24deg); }
}