html:has(body.immersive-entry) {
  scrollbar-gutter: auto;
}

.immersive-entry {
  overflow: hidden;
  overflow: clip;
  min-height: 100dvh;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.28), transparent 34%),
    #e8f1f8;
  color: #20170f;
}

.immersive-entry::before,
.immersive-entry::after {
  display: none;
}

.immersive-shell {
  position: relative;
  overflow: hidden;
  overflow: clip;
  width: 100%;
  height: 100dvh;
  margin: 0;
  background:
    radial-gradient(circle at 18% 18%, rgba(255, 250, 241, 0.84), transparent 28%),
    linear-gradient(180deg, #eef5fb 0%, #e6efe7 54%, #ded1c4 100%);
}

.immersive-scene {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: transparent;
}

.immersive-scene canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: default;
}

.immersive-topbar {
  position: absolute;
  right: max(24px, env(safe-area-inset-right));
  top: max(24px, env(safe-area-inset-top));
  z-index: 5;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  transition: opacity 220ms ease, transform 220ms ease;
}

.immersive-counter {
  display: flex;
  min-height: 44px;
  overflow: hidden;
  border: 1px solid rgba(76, 59, 38, 0.18);
  border-radius: 999px;
  background: rgba(255, 249, 239, 0.78);
  color: #211910;
  font-family: var(--font-mono);
  backdrop-filter: blur(16px);
  box-shadow: 0 8px 22px rgba(28, 22, 14, 0.08);
}

.immersive-counter__item {
  display: grid;
  align-content: center;
  gap: 2px;
  min-width: 74px;
  padding: 7px 13px;
}

.immersive-counter__item + .immersive-counter__item {
  border-left: 1px solid rgba(76, 59, 38, 0.12);
}

.immersive-counter__label,
.immersive-counter__value {
  display: block;
  line-height: 1.1;
}

.immersive-counter__label {
  color: rgba(45, 32, 22, 0.68);
  font-size: 10px;
  font-weight: 700;
}

.immersive-counter__value {
  color: #211910;
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.style-toggle {
  min-height: 44px;
  padding: 11px 16px;
  border: 1px solid rgba(76, 59, 38, 0.18);
  border-radius: 999px;
  background: rgba(255, 249, 239, 0.78);
  color: #211910;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  backdrop-filter: blur(16px);
  box-shadow: 0 8px 22px rgba(28, 22, 14, 0.08);
  transition: opacity 220ms ease, transform 220ms ease, background 220ms ease;
}

.style-toggle:hover {
  background: rgba(255, 252, 246, 0.94);
  transform: translateY(-1px);
}

.style-toggle:active {
  transform: translateY(0);
}

.immersive-shell:not(.is-loaded) .immersive-scene,
.immersive-shell:not(.is-loaded) .immersive-copy {
  opacity: 0;
}

.immersive-shell:not(.is-loaded) .immersive-topbar,
.immersive-shell.is-screen-mode .immersive-topbar {
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
}

.immersive-loader {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 44px;
  background:
    radial-gradient(circle at 18% 18%, rgba(255, 250, 241, 0.84), transparent 28%),
    linear-gradient(180deg, #eef5fb 0%, #e6efe7 54%, #ded1c4 100%);
  color: #20170f;
  transition: opacity 600ms cubic-bezier(0.4, 0, 0.2, 1), visibility 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Loader Visual Container ── */
.loader-visual {
  position: relative;
  width: 148px;
  height: 148px;
}

/* decorative static outer halo */
.loader-visual::before {
  content: "";
  position: absolute;
  inset: -14px;
  border-radius: 50%;
  border: 1px solid rgba(140, 100, 50, 0.09);
}

.loader-visual::after {
  content: "";
  position: absolute;
  inset: -28px;
  border-radius: 50%;
  border: 1px solid rgba(140, 100, 50, 0.045);
}

/* ── Rings ── */
.loader-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid transparent;
}

.loader-ring--outer {
  border-top-color: rgba(45, 32, 18, 0.88);
  border-right-color: rgba(45, 32, 18, 0.12);
  animation: loader-spin 2s cubic-bezier(0.45, 0.05, 0.55, 0.95) infinite;
  filter: drop-shadow(0 0 6px rgba(140, 100, 50, 0.18));
}

.loader-ring--inner {
  inset: 22px;
  border-bottom-color: rgba(141, 99, 47, 0.78);
  border-left-color: rgba(141, 99, 47, 0.1);
  animation: loader-spin 2.8s cubic-bezier(0.45, 0.05, 0.55, 0.95) infinite reverse;
  filter: drop-shadow(0 0 4px rgba(141, 99, 47, 0.2));
}

/* ── Core Dot ── */
.loader-core {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 10px;
  height: 10px;
  margin: -5px 0 0 -5px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(141, 99, 47, 0.95), rgba(100, 68, 30, 0.6));
  box-shadow:
    0 0 10px rgba(141, 99, 47, 0.45),
    0 0 28px rgba(141, 99, 47, 0.15);
  animation: loader-core-breathe 2.4s ease-in-out infinite;
}

/* ── Particles ── */
.loader-particles {
  position: absolute;
  inset: 0;
}

.loader-particles span {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 3.5px;
  height: 3.5px;
  margin: -1.75px 0 0 -1.75px;
  border-radius: 50%;
  background: rgba(141, 99, 47, 0.72);
  box-shadow: 0 0 3px rgba(141, 99, 47, 0.4);
  animation: loader-orbit 3.6s linear infinite;
  animation-delay: calc(var(--p) * 0.6s);
}

.loader-particles span:nth-child(1) { --p: 0; }
.loader-particles span:nth-child(2) { --p: 1; }
.loader-particles span:nth-child(3) { --p: 2; }
.loader-particles span:nth-child(4) { --p: 3; }
.loader-particles span:nth-child(5) { --p: 4; }
.loader-particles span:nth-child(6) { --p: 5; }

/* ── Text ── */
.loader-text {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.loader-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.38em;
  color: rgba(141, 99, 47, 0.82);
  text-indent: 0.38em;
  animation: loader-text-fade 2.4s ease-in-out infinite;
}


.immersive-shell.is-loaded .immersive-loader {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}

.immersive-copy {
  position: absolute;
  left: max(28px, env(safe-area-inset-left));
  bottom: max(34px, env(safe-area-inset-bottom));
  z-index: 2;
  max-width: calc(100vw - 56px);
  pointer-events: none;
  transition: opacity 360ms ease, transform 360ms ease;
}

.immersive-copy.is-hidden {
  opacity: 0;
  transform: translateY(16px);
}

.immersive-copy .eyebrow {
  color: #8d632f;
}

.immersive-copy h1 {
  margin-bottom: 18px;
  color: #20170f;
  font-size: 72px;
  line-height: 0.98;
  text-shadow: none;
}

.immersive-copy p:not(.eyebrow) {
  max-width: 34em;
  color: rgba(45, 32, 22, 0.78);
}

.immersive-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  pointer-events: auto;
}

.immersive-actions .button {
  min-width: 148px;
  border-color: rgba(93, 69, 47, 0.18);
}

.immersive-actions .button-primary {
  background: linear-gradient(135deg, #1a1917 0%, #2c2418 100%);
  color: #fffaf0;
  box-shadow:
    0 10px 24px rgba(18, 17, 16, 0.08),
    0 0 0 0 rgba(32, 23, 15, 0);
  transition: all 360ms cubic-bezier(0.4, 0, 0.2, 1);
}

.immersive-actions .button-primary:not(:disabled):hover {
  transform: translateY(-2px);
  box-shadow:
    0 14px 32px rgba(18, 17, 16, 0.12),
    0 0 0 1px rgba(255, 250, 240, 0.1);
}

.immersive-actions .button-primary:not(:disabled):active {
  transform: translateY(0);
  box-shadow:
    0 8px 16px rgba(18, 17, 16, 0.1),
    0 0 0 0 rgba(32, 23, 15, 0);
  transition-duration: 120ms;
}

.immersive-actions .button:disabled {
  cursor: wait;
  opacity: 0.62;
}

.immersive-actions .button-secondary {
  background: rgba(255, 255, 255, 0.62);
  color: #20170f;
}

.immersive-hint {
  display: none;
  position: absolute;
  right: max(24px, env(safe-area-inset-right));
  top: max(24px, env(safe-area-inset-top));
  z-index: 2;
  max-width: min(360px, calc(100vw - 48px));
  padding: 12px 16px;
  border: 1px solid rgba(106, 84, 59, 0.14);
  border-radius: 999px;
  background: rgba(255, 249, 241, 0.72);
  color: rgba(45, 32, 22, 0.82);
  font-family: var(--font-mono);
  font-size: 13px;
  backdrop-filter: blur(18px);
  transition: opacity 220ms ease, transform 220ms ease;
}

.immersive-hint.is-hidden {
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
}

.screen-portal {
  position: absolute;
  left: 0;
  top: 0;
  width: auto;
  height: auto;
  z-index: 1;
  opacity: 1;
  pointer-events: none;
  transform-origin: 50% 50%;
  transition: opacity 280ms ease;
}

.screen-portal.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.screen-portal.is-sharp {
  z-index: 3;
  filter: none;
  will-change: auto;
}

.screen-chrome {
  overflow: hidden;
  overflow: clip;
  width: 100%;
  height: 100%;
  border: 0;
  border-radius: 0;
  background: #fcfbf8;
  box-shadow:
    0 0 14px rgba(173, 215, 244, 0.28),
    0 0 34px rgba(147, 197, 231, 0.16);
}

.screen-bar {
  display: none;
}

.screen-bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 250, 240, 0.72);
}

.screen-bar span:nth-child(1) {
  background: #ef6760;
}

.screen-bar span:nth-child(2) {
  background: #f0bd4f;
}

.screen-bar span:nth-child(3) {
  background: #62c554;
}

.screen-chrome iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #fcfbf8;
}

.portal-back {
  position: absolute;
  left: max(28px, env(safe-area-inset-left));
  bottom: max(34px, env(safe-area-inset-bottom));
  z-index: 5;
  min-height: 44px;
  min-width: 148px;
  padding: 13px 20px;
  border: 1px solid rgba(106, 84, 59, 0.14);
  border-radius: 999px;
  background: rgba(255, 249, 241, 0.78);
  color: #20170f;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  backdrop-filter: blur(18px);
  box-shadow:
    0 8px 20px rgba(18, 17, 16, 0.06),
    0 0 0 0 rgba(106, 84, 59, 0);
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
  transition: all 360ms cubic-bezier(0.4, 0, 0.2, 1);
}

.portal-back.is-visible {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.portal-back:hover {
  background: rgba(255, 255, 255, 0.92);
  box-shadow:
    0 12px 28px rgba(18, 17, 16, 0.08),
    0 0 0 1px rgba(106, 84, 59, 0.08);
}

.immersive-shell.is-screen-mode .portal-back.is-visible:hover {
  transform: translateY(-2px);
}

.portal-back:active {
  transform: translateY(0);
  box-shadow:
    0 6px 14px rgba(18, 17, 16, 0.08),
    0 0 0 0 rgba(106, 84, 59, 0);
  transition-duration: 120ms;
}

.immersive-noscript {
  position: absolute;
  left: 24px;
  bottom: 24px;
  z-index: 6;
  max-width: 520px;
  padding: 18px 20px;
  background: #fffaf0;
  color: #16120d;
}

.immersive-noscript a {
  text-decoration: underline;
}

@media (max-width: 760px) {
  .immersive-copy {
    right: 20px;
    bottom: 24px;
    left: 20px;
    max-width: none;
  }

  .immersive-actions,
  .immersive-actions .button {
    width: 100%;
  }

  .immersive-hint {
    top: 16px;
    right: 16px;
    left: 16px;
    max-width: none;
  }

  .immersive-topbar {
    top: 16px;
    right: 16px;
    left: 16px;
    justify-content: flex-end;
  }

  .immersive-counter {
    max-width: calc(100vw - 120px);
  }

  .immersive-counter__item {
    min-width: 62px;
    padding-inline: 10px;
  }

  .screen-portal {
    transition-duration: 220ms;
  }

  .screen-chrome {
    border-radius: 3px;
  }

  .portal-back {
    left: 20px;
    bottom: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .immersive-copy,
  .immersive-loader,
  .screen-portal,
  .portal-back,
  .style-toggle,
  .immersive-topbar {
    transition-duration: 0.01ms !important;
  }

  .loader-ring,
  .loader-core,
  .loader-particles span,
  .loader-title {
    animation-duration: 0.01ms !important;
  }
}

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

@keyframes loader-core-breathe {
  0%, 100% {
    opacity: 0.6;
    transform: scale(0.85);
    box-shadow: 0 0 6px rgba(141, 99, 47, 0.2), 0 0 14px rgba(141, 99, 47, 0.07);
  }
  50% {
    opacity: 1;
    transform: scale(1.2);
    box-shadow: 0 0 14px rgba(141, 99, 47, 0.55), 0 0 36px rgba(141, 99, 47, 0.2);
  }
}

@keyframes loader-orbit {
  0% {
    transform: rotate(calc(var(--p) * 60deg)) translateX(52px) scale(0.4);
    opacity: 0;
  }
  15% {
    opacity: 0.9;
    transform: rotate(calc(var(--p) * 60deg)) translateX(52px) scale(1);
  }
  85% {
    opacity: 0.9;
    transform: rotate(calc(var(--p) * 60deg + 300deg)) translateX(52px) scale(1);
  }
  100% {
    transform: rotate(calc(var(--p) * 60deg + 360deg)) translateX(52px) scale(0.4);
    opacity: 0;
  }
}

@keyframes loader-text-fade {
  0%, 100% {
    opacity: 0.55;
  }
  50% {
    opacity: 1;
  }
}