:root {
  --ckh-handoff-canvas: #030304;
  --ckh-handoff-red: #ff6075;
  --ckh-handoff-red-rgb: 255, 51, 79;
}

.ckh-handoff {
  position: fixed;
  inset: 0;
  z-index: 1100;
  overflow: hidden;
  visibility: hidden;
  pointer-events: none;
  background: var(--ckh-handoff-canvas);
}

.ckh-handoff-panel {
  position: absolute;
  left: 0;
  width: 100%;
  height: calc(50% + 2px);
  background:
    radial-gradient(circle at 72% 50%, rgba(var(--ckh-handoff-red-rgb), 0.08), transparent 34%),
    linear-gradient(90deg, #020203, #080607 48%, #030304),
    var(--ckh-handoff-canvas);
  box-shadow: 0 0 50px rgba(0, 0, 0, 0.92);
  will-change: transform;
}

.ckh-handoff-panel-top {
  top: 0;
  transform: translateY(-102%);
}

.ckh-handoff-panel-bottom {
  bottom: 0;
  transform: translateY(102%);
}

.ckh-handoff-seam {
  position: absolute;
  z-index: 2;
  top: 50%;
  left: 50%;
  width: min(820px, 78vw);
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(var(--ckh-handoff-red-rgb), 0.64) 15%,
    var(--ckh-handoff-red) 50%,
    rgba(var(--ckh-handoff-red-rgb), 0.64) 85%,
    transparent
  );
  box-shadow:
    0 0 16px rgba(var(--ckh-handoff-red-rgb), 0.88),
    0 0 54px rgba(var(--ckh-handoff-red-rgb), 0.44);
  opacity: 0;
  transform: translate(-50%, -50%) scaleX(0.06);
}

.ckh-handoff-confirmation {
  position: absolute;
  z-index: 3;
  top: calc(50% - clamp(64px, 8vh, 86px));
  right: 0;
  left: 0;
  display: grid;
  grid-template-columns: 32px auto;
  align-items: center;
  gap: 12px;
  width: max-content;
  margin-inline: auto;
  visibility: hidden;
  text-shadow: 0 0 0 rgba(var(--ckh-handoff-red-rgb), 0);
}

.ckh-handoff-confirmation strong {
  color: #fffafb;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: clamp(0.82rem, 1.2vw, 0.94rem);
  font-weight: 900;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  white-space: nowrap;
}

.ckh-handoff-check {
  position: relative;
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border: 1px solid rgba(255, 89, 112, 0.72);
  border-radius: 50%;
  background: rgba(var(--ckh-handoff-red-rgb), 0.1);
  box-shadow: 0 0 24px rgba(var(--ckh-handoff-red-rgb), 0.26);
}

.ckh-handoff-check i {
  width: 7px;
  height: 12px;
  margin-top: -2px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) scale(0);
}

body.unlocked .ckh-handoff,
html.site-intro-pending .ckh-handoff,
body.site-arriving-login .ckh-handoff {
  visibility: visible;
}

html.site-intro-pending .ckh-handoff-panel-top,
body.site-arriving-login .ckh-handoff-panel-top,
html.site-intro-pending .ckh-handoff-panel-bottom,
body.site-arriving-login .ckh-handoff-panel-bottom {
  transform: translateY(0);
}

html.site-intro-pending .ckh-handoff-seam,
body.site-arriving-login .ckh-handoff-seam {
  opacity: 1;
  transform: translate(-50%, -50%) scaleX(1);
}

html.site-intro-pending .ckh-handoff-confirmation,
body.site-arriving-login .ckh-handoff-confirmation {
  visibility: visible;
  text-shadow: 0 0 18px rgba(var(--ckh-handoff-red-rgb), 0.22);
}

html.site-intro-pending .ckh-handoff-check i,
body.site-arriving-login .ckh-handoff-check i {
  transform: rotate(45deg) scale(1);
}

body.unlocked .ckh-handoff-panel-top {
  animation: ckhHandoffCloseTop 700ms 90ms cubic-bezier(0.76, 0, 0.24, 1) forwards;
}

body.unlocked .ckh-handoff-panel-bottom {
  animation: ckhHandoffCloseBottom 700ms 90ms cubic-bezier(0.76, 0, 0.24, 1) forwards;
}

body.unlocked .ckh-handoff-seam {
  animation: ckhHandoffSeamIn 880ms 120ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

body.unlocked .ckh-handoff-confirmation {
  animation: ckhHandoffConfirmationIn 430ms 650ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

body.unlocked .ckh-handoff-check i {
  animation: ckhHandoffCheckIn 280ms 730ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.ckh-handoff.ckh-handoff-revealing {
  animation: ckhHandoffDismiss 740ms linear forwards;
}

.ckh-handoff.ckh-handoff-revealing .ckh-handoff-panel-top {
  animation: ckhHandoffOpenTop 640ms 40ms cubic-bezier(0.76, 0, 0.24, 1) forwards;
}

.ckh-handoff.ckh-handoff-revealing .ckh-handoff-panel-bottom {
  animation: ckhHandoffOpenBottom 640ms 40ms cubic-bezier(0.76, 0, 0.24, 1) forwards;
}

.ckh-handoff.ckh-handoff-revealing .ckh-handoff-seam {
  animation: ckhHandoffSeamOut 680ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.ckh-handoff.ckh-handoff-revealing .ckh-handoff-confirmation {
  animation: ckhHandoffConfirmationOut 160ms ease forwards;
}

@keyframes ckhHandoffCloseTop {
  to { transform: translateY(0); }
}

@keyframes ckhHandoffCloseBottom {
  to { transform: translateY(0); }
}

@keyframes ckhHandoffSeamIn {
  0% { opacity: 0; transform: translate(-50%, -50%) scaleX(0.06); }
  42%, 100% { opacity: 1; transform: translate(-50%, -50%) scaleX(1); }
}

@keyframes ckhHandoffConfirmationIn {
  0%, 39% {
    visibility: hidden;
    text-shadow: 0 0 0 rgba(var(--ckh-handoff-red-rgb), 0);
  }
  40%, 100% {
    visibility: visible;
    text-shadow: 0 0 18px rgba(var(--ckh-handoff-red-rgb), 0.26);
  }
}

@keyframes ckhHandoffCheckIn {
  to { transform: rotate(45deg) scale(1); }
}

@keyframes ckhHandoffOpenTop {
  to { transform: translateY(-102%); }
}

@keyframes ckhHandoffOpenBottom {
  to { transform: translateY(102%); }
}

@keyframes ckhHandoffSeamOut {
  0%, 28% { opacity: 1; transform: translate(-50%, -50%) scaleX(1); }
  100% { opacity: 0; transform: translate(-50%, -50%) scaleX(1.08); }
}

@keyframes ckhHandoffConfirmationOut {
  0%, 99% { visibility: visible; }
  100% { visibility: hidden; }
}

@keyframes ckhHandoffDismiss {
  0%, 96% { visibility: visible; }
  100% { visibility: hidden; }
}