:root {
  color-scheme: light;
  --ink: #0a0a0a;
  --paper: #f4f3ef;
  --grey: #8c8c86;
  --grey-strong: #6a6a63;
  --line: rgba(10, 10, 10, 0.14);
  --line-strong: rgba(10, 10, 10, 0.28);
  --tint: rgba(10, 10, 10, 0.02);
  --text-soft: #3a3a38;
  --text-body: #2b2b29;
  --guide-major: rgba(10, 10, 10, 1);
  --guide-minor: rgba(10, 10, 10, 0.42);
  --guide-h: rgba(10, 10, 10, 0.5);
  --blend-src: #f4f3ef;
  --noise-dot: #000;
  --noise-blend: multiply;
  --noise-opacity: 0.035;
  --grid-invert: none;
  --planet-1: #8c8c86;
  --planet-2: #6a6a63;
  --planet-3: #0a0a0a;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font-sans: "Helvetica Neue", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  --font-mono: "SF Mono", "Consolas", "Courier New", monospace;

  --font-display: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC",
    "Noto Sans SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --logo-base: clamp(120px, 20vw, 248px);
  --logo-expand: 1.55;
  --logo-final: calc(var(--logo-base) * var(--logo-expand));
  --view-shift: clamp(2vh, 4.5vh, 6vh);
  --shell: 1200px;
  --shell-pad: 2.4rem;
  --shell-sub: min(92vw, 1800px);
  --title-left: calc(max((100vw - var(--shell-sub)) / 2, 0px) + var(--shell-pad));
  --title-top: clamp(8.5rem, 17vh, 12rem);
  --travel: 380ms;
  --reveal: 300ms;
  --ease-out: cubic-bezier(0.16, 0.84, 0.28, 1);
  --header-pad-y: 1rem;
  --header-btn: 42px;
  --header-h: calc(var(--header-pad-y) * 2 + var(--header-btn));
  --bar-h: calc(35px + 0.85rem);
  --planet-slot: 21px;
  --scale-h: 24px;
  --scale-gap: 3px;
  --tick-step: 9px;
  --bar-pad-b: 0.85rem;
  --bar-rule: 1px;
  --freq-top: 9px;
}

@media (max-width: 600px) {
  :root {
    --shell-pad: 1.4rem;
    --header-pad-y: 0.75rem;
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
html::-webkit-scrollbar {
  display: none;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  overflow-x: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
body::-webkit-scrollbar {
  display: none;
}

a {
  color: inherit;
  text-decoration: none;
}

::selection {
  background: var(--ink);
  color: var(--paper);
}

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 4px;
}

.site-header :focus-visible {
  outline-color: var(--blend-src);
}

body.has-custom-cursor,
body.has-custom-cursor .menu-toggle {
  cursor: none;
}

.noise {
  position: fixed;
  inset: 0;
  z-index: 9998;
  pointer-events: none;
  opacity: var(--noise-opacity);
  mix-blend-mode: var(--noise-blend);
  background-image:
    radial-gradient(circle at 1px 1px, var(--noise-dot) 1px, transparent 0);
  background-size: 3px 3px;
}

.cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--blend-src);
  mix-blend-mode: difference;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: width 0.25s var(--ease), height 0.25s var(--ease);
  opacity: 0;
}
.cursor.is-live {
  opacity: 1;
}
.cursor.hovering {
  width: 46px;
  height: 46px;
}
@media (hover: none), (pointer: coarse) {
  .cursor { display: none; }
  body { cursor: auto; }
}

.splash {
  position: fixed;
  inset: 0;
  z-index: 10000;
}

#splash.leave.leave .wide {
  opacity: 0;
  transition: opacity 0.42s var(--ease) 0.12s;
}
#splash.leave.leave .hud {
  opacity: 0;
  transition: opacity 0.34s var(--ease) 0.06s;
}
#splash.leave.leave .splash-rule {
  opacity: 0;
  transition: opacity 0.3s var(--ease) 0.1s;
}
#splash.leave.leave .panel {
  opacity: 0;
  transition: opacity 0.3s var(--ease) 0.1s;
}
#splash.leave.leave .reticle {
  opacity: 0;
  transition: opacity 0.26s var(--ease);
}

#splash.leave.leave .splash-side {
  opacity: 0;
  transition: opacity 0.3s linear 0.18s;
}

#splash.leave.leave .side-no {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  transition:
    font-size 0.36s var(--ease) 0.02s,
    letter-spacing 0.36s var(--ease) 0.02s;
}
#splash.leave.leave .side-sub {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  transition:
    font-size 0.36s var(--ease) 0.02s,
    letter-spacing 0.36s var(--ease) 0.02s;
}

#splash.leave.leave .side-title {
  font-size: clamp(1.35rem, 2.7vw, 2.35rem);
  font-weight: 500;
  letter-spacing: 0.04em;
  margin-right: -0.04em;
  transform: translateX(calc(var(--stage-gap) - clamp(52px, 5vw, 76px) - 0.04em));
  transition:
    font-size 0.36s var(--ease) 0.02s,
    letter-spacing 0.36s var(--ease) 0.02s,
    margin-right 0.36s var(--ease) 0.02s,
    transform 0.36s var(--ease) 0.02s;
}
#splash.leave.leave .splash-side-right .side-title {
  margin-right: 0;
  margin-left: -0.04em;
  transform: translateX(calc(clamp(52px, 5vw, 76px) - var(--stage-gap) + 0.04em));
  transition:
    font-size 0.36s var(--ease) 0.02s,
    letter-spacing 0.36s var(--ease) 0.02s,
    margin-left 0.36s var(--ease) 0.02s,
    transform 0.36s var(--ease) 0.02s;
}
#splash.leave.leave .statusbar {
  opacity: 0;
  transition: opacity 0.3s var(--ease) 0.16s;
}

#splash.leave.leave .splash-bg {
  opacity: 0;
  transition: opacity 0.42s var(--ease) 0.12s;
}

#splash.leave.leave .splash-grid,
#splash.leave.leave .fr {
  opacity: 0;
  transition: opacity 0.42s var(--ease) 0.12s;
}

.splash-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: var(--paper);
}

.deco {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.splash-grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='66.00' height='38.11' viewBox='0 0 66.00 38.11'%3E%3Cg fill='none' stroke='%230a0a0a' stroke-width='1'%3E%3Cpath d='M22.00 0.00L11.00 19.05L-11.00 19.05L-22.00 0.00L-11.00 -19.05L11.00 -19.05Z'/%3E%3Cpath d='M22.00 38.11L11.00 57.16L-11.00 57.16L-22.00 38.11L-11.00 19.05L11.00 19.05Z'/%3E%3Cpath d='M55.00 19.05L44.00 38.11L22.00 38.11L11.00 19.05L22.00 0.00L44.00 0.00Z'/%3E%3Cpath d='M88.00 0.00L77.00 19.05L55.00 19.05L44.00 0.00L55.00 -19.05L77.00 -19.05Z'/%3E%3Cpath d='M88.00 38.11L77.00 57.16L55.00 57.16L44.00 38.11L55.00 19.05L77.00 19.05Z'/%3E%3C/g%3E%3C/svg%3E");
  background-size: 66px 38.11px;
  filter: var(--grid-invert);
  mask-image: radial-gradient(ellipse 78% 68% at 50% 46%, #000 0%, rgba(0,0,0,0.45) 52%, transparent 82%);
  -webkit-mask-image: radial-gradient(ellipse 78% 68% at 50% 46%, #000 0%, rgba(0,0,0,0.45) 52%, transparent 82%);
  transition: opacity 1.1s var(--ease);
}

#splash.phase-logo .splash-grid { opacity: 0.075; }
#splash.phase-expand .splash-grid { opacity: 0.045; }

body.sp-logo .deco .splash-grid,
body.sp-name .deco .splash-grid,
body.sp-code .deco .splash-grid { opacity: 0.075; }
body.deco-on .deco .splash-grid { opacity: 0.045; }

.splash-frame {
  position: absolute;
  inset: clamp(14px, 2.2vw, 30px);
  z-index: 2;
  pointer-events: none;
}
.fr {
  position: absolute;
  width: clamp(22px, 3vw, 40px);
  height: clamp(22px, 3vw, 40px);
  opacity: 0;
  transition: opacity 0.5s var(--ease), transform 0.7s var(--ease);
}
.fr-tl { top: 0; left: 0; border-top: 1px solid var(--ink); border-left: 1px solid var(--ink); transform: translate(-7px, -7px); }
.fr-tr { top: 0; right: 0; border-top: 1px solid var(--ink); border-right: 1px solid var(--ink); transform: translate(7px, -7px); }
.fr-bl { bottom: 0; left: 0; border-bottom: 1px solid var(--ink); border-left: 1px solid var(--ink); transform: translate(-7px, 7px); }
.fr-br { bottom: 0; right: 0; border-bottom: 1px solid var(--ink); border-right: 1px solid var(--ink); transform: translate(7px, 7px); }
#splash.phase-logo .fr {
  opacity: 0.55;
  transform: translate(0, 0);
}

body.sp-logo .deco .fr,
body.sp-name .deco .fr,
body.sp-code .deco .fr,
body.deco-on .deco .fr {
  opacity: 0.55;
  transform: translate(0, 0);
}

.splash-rule {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  width: min(52vw, 620px);
  height: 7px;
  pointer-events: none;
  opacity: 0;
  background-image: repeating-linear-gradient(
    to right,
    var(--ink) 0 1px,
    transparent 1px 14px
  );
  transition: opacity 0.7s var(--ease) 0.25s;
}
.splash-rule-t { top: clamp(30px, 4.4vw, 56px); }
.splash-rule-b {
  bottom: clamp(30px, 4.4vw, 56px);
  transform: translateX(-50%) scaleY(-1);
}
#splash.phase-name .splash-rule { opacity: 0.3; }

.hud {
  position: absolute;
  inset: clamp(14px, 2.2vw, 30px);
  z-index: 4;
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  color: var(--grey-strong);
  opacity: 0;
  transition: opacity 0.7s var(--ease) 0.15s;
}
#splash.phase-logo .hud { opacity: 1; }

.hud > div {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 0.5em;
  white-space: nowrap;
}

.hud-tl { top: 0; left: calc(clamp(22px, 3vw, 40px) + 0.9rem); }
.hud-tr { top: 0; right: calc(clamp(22px, 3vw, 40px) + 0.9rem); }
.hud-bl { bottom: 0; left: calc(clamp(22px, 3vw, 40px) + 0.9rem); }
.hud-br { bottom: 0; right: calc(clamp(22px, 3vw, 40px) + 0.9rem); }

.hud-k {
  opacity: 0.62;
}
.hud-k::after {
  content: ":";
  margin-left: 0.35em;
}
.hud-v {
  color: var(--ink);
}

.hud-v.flick {
  animation: hudFlick 0.26s steps(2, end) 2;
}
@keyframes hudFlick {
  50% { opacity: 0.15; }
}

.hud-bar {
  display: inline-block;
  width: clamp(48px, 7vw, 88px);
  height: 3px;
  background: var(--line);
  overflow: hidden;
}
.hud-bar i {
  display: block;
  width: 0;
  height: 100%;
  background: var(--ink);
  transition: width 0.45s steps(6, end);
}

.reticle {
  position: absolute;
  inset: -14px;
  pointer-events: none;
  opacity: 0;
  transform: scale(1.14);
  transition: opacity 0.7s var(--ease), transform 0.9s var(--ease);
}
#splash.phase-logo .reticle {
  opacity: 0.62;
  transform: scale(1);
}

#splash.phase-expand .reticle {
  opacity: 0;
  transform: scale(1.1);
}

.rt {
  position: absolute;
  width: 13px;
  height: 13px;
}
.rt-tl { top: 0; left: 0; border-top: 1px solid var(--ink); border-left: 1px solid var(--ink); }
.rt-tr { top: 0; right: 0; border-top: 1px solid var(--ink); border-right: 1px solid var(--ink); }
.rt-bl { bottom: 0; left: 0; border-bottom: 1px solid var(--ink); border-left: 1px solid var(--ink); }
.rt-br { bottom: 0; right: 0; border-bottom: 1px solid var(--ink); border-right: 1px solid var(--ink); }

.rt-tick {
  position: absolute;
  background: var(--ink);
  opacity: 0.5;
}
.rt-tick-t, .rt-tick-b { left: 50%; width: 1px; height: 6px; margin-left: -0.5px; }
.rt-tick-l, .rt-tick-r { top: 50%; width: 6px; height: 1px; margin-top: -0.5px; }
.rt-tick-t { top: -3px; }
.rt-tick-b { bottom: -3px; }
.rt-tick-l { left: -3px; }
.rt-tick-r { right: -3px; }

@media (max-width: 520px) {
  .hud { font-size: 0.6rem; letter-spacing: 0.12em; }
  .hud-coord { display: none; }
  .splash-rule { width: min(64vw, 320px); }
}
@media (max-width: 400px) {
  .hud-tl .hud-k,
  .hud-tr .hud-k { display: none; }
}

.cap-br {
  color: var(--grey-strong);
  opacity: 0.7;
}

.splash-content {
  position: relative;
  z-index: 1;
  height: 100%;
  display: grid;
  place-items: center;
  color: var(--ink);
  --logo-size: var(--logo-base);
  --meta-offset: calc(var(--logo-size) / 2 + 1rem);
  --stage-gap: clamp(1rem, 3.5vw, 3.2rem);
  transform: translateY(calc(-1 * var(--view-shift)));
}

.splash-stage {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--stage-gap);
  width: min(96vw, 1040px);
  transition: gap 1.2s var(--ease);
}

#splash.phase-expand .splash-stage {
  gap: calc(var(--stage-gap) + var(--logo-size) * (var(--logo-expand) - 1) / 2);
}

.splash-logo-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.splash-logo {
  display: block;
  width: var(--logo-size);
  height: auto;
  opacity: 0;
  transform: scale(0.82);
  filter: blur(7px);
  transition:
    opacity 0.9s var(--ease),
    transform 1.1s var(--ease),
    filter 0.9s var(--ease);
}
#splash.phase-logo .splash-logo {
  opacity: 1;
  transform: scale(1);
  filter: blur(0);
}

.panel {
  grid-row: 1;
  width: clamp(164px, 19.5vw, 268px);
  display: flex;
  gap: 0.85rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.7s var(--ease), transform 0.9s var(--ease);
}

.panel-left {
  grid-column: 1;
  justify-self: end;
  transform: translateX(-16px);
}
.panel-right {
  grid-column: 3;
  justify-self: start;
  flex-direction: row-reverse;
  transform: translateX(16px);
}
#splash.phase-logo .panel {
  opacity: 1;
  transform: translateX(0);
}

#splash.phase-expand .panel {
  opacity: 0;
  transition-duration: 0.5s, 0.5s;
}
#splash.phase-expand .panel-left { transform: translateX(-14px); }
#splash.phase-expand .panel-right { transform: translateX(14px); }

.panel-rail {
  position: relative;
  flex: none;
  width: 12px;
  display: flex;
  justify-content: center;
}

.panel-rail i {
  width: 7px;
  height: 100%;
  background-image: repeating-linear-gradient(
    to bottom,
    var(--ink) 0 1px,
    transparent 1px 11px
  );
  opacity: 0.32;
}
.panel-seq {
  position: absolute;
  top: 50%;
  left: 50%;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.22em;
  color: var(--grey-strong);
  white-space: nowrap;
  transform: translate(-50%, -50%) rotate(-90deg);
  background: var(--paper);
  padding: 0.35em 0.2em;
}

.panel-body {
  position: relative;
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: 0.9rem 0 0.9rem 0.85rem;
  border-left: 1px solid var(--ink);
}
.panel-body::before,
.panel-body::after {
  content: "";
  position: absolute;
  left: 0;
  width: 14px;
  height: 1px;
  background: var(--ink);
}
.panel-body::before { top: 0; }
.panel-body::after { bottom: 0; }

.panel-right .panel-body {
  padding: 0.9rem 0.85rem 0.9rem 0;
  border-left: none;
  border-right: 1px solid var(--ink);
  align-items: flex-end;
  text-align: right;
}
.panel-right .panel-body::before,
.panel-right .panel-body::after {
  left: auto;
  right: 0;
}

.panel-label,
.panel-foot {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--grey-strong);
  white-space: nowrap;
}
.panel-foot { opacity: 0.75; }

.panel-bars {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 100%;
}
.panel-bars i {
  display: block;
  width: 0;
  height: 3px;
  background: var(--ink);
  opacity: 0.42;
  transition: width 0.55s steps(5, end);
}
#splash.phase-name .panel-bars i { width: var(--w); }
#splash.phase-name .panel-bars i:nth-child(1) { transition-delay: 0.05s; }
#splash.phase-name .panel-bars i:nth-child(2) { transition-delay: 0.14s; }
#splash.phase-name .panel-bars i:nth-child(3) { transition-delay: 0.23s; }
#splash.phase-name .panel-bars i:nth-child(4) { transition-delay: 0.32s; }
#splash.phase-name .panel-bars i:nth-child(5) { transition-delay: 0.41s; }

.panel-read {
  display: flex;
  flex-direction: column;
  gap: 0.34rem;
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.14em;
}
.panel-read > span {
  display: flex;
  align-items: baseline;
  gap: 0.4em;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.45s var(--ease), transform 0.45s var(--ease);
}
.panel-read b {
  font-weight: 400;
  color: var(--grey-strong);
  flex: none;
}

.panel-read b::after {
  content: "";
  display: inline-block;
  vertical-align: middle;
}
.panel-read > span::before {
  content: "";
  flex: 1;
  height: 0;
  border-bottom: 1px dotted var(--line-strong);
  transform: translateY(-0.2em);
}
.panel-read em {
  font-style: normal;
  color: var(--ink);
  flex: none;
}
.panel-right .panel-read > span { flex-direction: row-reverse; }

#splash.phase-name .panel-read > span {
  opacity: 1;
  transform: translateY(0);
}
#splash.phase-name .panel-read > span:nth-child(1) { transition-delay: 0.5s; }
#splash.phase-name .panel-read > span:nth-child(2) { transition-delay: 0.6s; }
#splash.phase-name .panel-read > span:nth-child(3) { transition-delay: 0.7s; }

.panel-hex {
  display: flex;
  gap: 4px;
}
.panel-hex i {
  width: 13px;
  height: 15px;
  background: var(--ink);
  opacity: 0;
  clip-path: polygon(50% 0, 100% 25%, 100% 75%, 50% 100%, 0 75%, 0 25%);
  transition: opacity 0.4s steps(2, end);
}

#splash.phase-code .panel-hex i:nth-child(1) { opacity: 0.5; transition-delay: 0.05s; }
#splash.phase-code .panel-hex i:nth-child(2) { opacity: 0.2; transition-delay: 0.12s; }
#splash.phase-code .panel-hex i:nth-child(3) { opacity: 0.62; transition-delay: 0.19s; }
#splash.phase-code .panel-hex i:nth-child(4) { opacity: 0.16; transition-delay: 0.26s; }
#splash.phase-code .panel-hex i:nth-child(5) { opacity: 0.44; transition-delay: 0.33s; }
#splash.phase-code .panel-hex i:nth-child(6) { opacity: 0.26; transition-delay: 0.40s; }
#splash.phase-code .panel-hex i:nth-child(7) { opacity: 0.55; transition-delay: 0.47s; }

@media (max-width: 900px) {
  .panel { display: none; }
}

.splash-meta {
  position: absolute;
  left: 50%;
  top: 50%;
  width: min(88vw, 480px);
  transform: translate(-50%, var(--meta-offset));
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: opacity 0.6s var(--ease), transform 0.7s var(--ease);
}

.splash-name {
  display: flex;
  gap: 0.1em;
  font-size: clamp(1.15rem, 2.4vw, 1.6rem);
  font-weight: 500;
  letter-spacing: 0.26em;
  text-indent: 0.26em;
}
.splash-letter {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.5em);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
#splash.phase-name .splash-letter {
  opacity: 1;
  transform: translateY(0);
}
#splash.phase-name .splash-letter:nth-child(1) { transition-delay: 0s; }
#splash.phase-name .splash-letter:nth-child(2) { transition-delay: 0.09s; }
#splash.phase-name .splash-letter:nth-child(3) { transition-delay: 0.18s; }
#splash.phase-name .splash-letter:nth-child(4) { transition-delay: 0.27s; }
#splash.phase-name .splash-letter:nth-child(5) { transition-delay: 0.36s; }

.splash-line {
  width: 0;
  height: 1px;
  background: var(--ink);
  margin-top: 0.95rem;
  opacity: 0.45;
  transition: width 0.8s var(--ease) 0.45s;
}
#splash.phase-name .splash-line { width: 84px; }

.splash-caption {
  margin-top: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.3em;
  color: var(--grey-strong);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.6s var(--ease) 0.6s, transform 0.6s var(--ease) 0.6s;
}
#splash.phase-name .splash-caption {
  opacity: 1;
  transform: translateY(0);
}

.splash-code {
  width: min(88vw, 37ch);
  margin-left: auto;
  margin-right: auto;
  min-height: 6.8em;
  margin-top: 1.35rem;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.7;
  letter-spacing: 0.01em;
  color: var(--ink);
  text-align: left;
  opacity: 0;
  transition: opacity 0.5s var(--ease);
}
#splash.phase-code .splash-code { opacity: 1; }

.code-line {
  display: block;
  white-space: pre;
}
.code-line::before {
  content: "> ";
  color: var(--grey-strong);
}
.code-line.active .code-cursor {
  display: inline-block;
  margin-left: 1px;
  animation: blink 0.9s steps(1, end) infinite;
}
.code-cursor {
  display: none;
}
@keyframes blink {
  50% { opacity: 0; }
}

.splash-side {
  grid-row: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  opacity: 0;
  transition:
    opacity 0.9s var(--ease) 0.18s,
    transform 1.1s var(--ease) 0.18s;
}
.splash-side-left {
  grid-column: 1;
  align-items: flex-end;
  text-align: right;
  transform: translateX(clamp(22px, 4vw, 52px));
}
.splash-side-right {
  grid-column: 3;
  align-items: flex-start;
  text-align: left;
  transform: translateX(clamp(-52px, -4vw, -22px));
}

.side-no {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.28em;
  color: var(--grey-strong);
}

.side-title {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.1vw, 2.7rem);
  font-weight: 700;
  letter-spacing: 0.085em;
  line-height: 1.16;
  margin-right: -0.085em;
}
.splash-side-right .side-title {
  margin-right: 0;
  margin-left: -0.085em;
}
.side-sub {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  letter-spacing: 0.2em;
  color: var(--grey-strong);
}

#splash.phase-expand .splash-side {
  opacity: 1;
  transform: translateX(0);
}

.splash-side > span {
  opacity: 0;
  transition: opacity 0.6s var(--ease);
}
#splash.phase-expand .side-no { opacity: 1; transition-delay: 0.3s; }
#splash.phase-expand .side-title { opacity: 1; transition-delay: 0.42s; }
#splash.phase-expand .side-sub { opacity: 1; transition-delay: 0.56s; }

#splash.phase-expand .splash-logo {
  transform: scale(var(--logo-expand));
  transition-duration: 1.2s;
}
#splash.phase-expand .splash-meta {
  opacity: 0;
  transform: translate(-50%, calc(var(--meta-offset) + 14px));
  pointer-events: none;
}

.statusbar {
  --sb-gap: clamp(64px, 8vh, 108px);
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, calc(var(--logo-size) * var(--logo-expand) / 2 + var(--sb-gap)));
  width: min(84vw, 920px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(1rem, 2vh, 1.6rem);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.8s var(--ease);
}

.sb-main {
  width: 100%;
  display: flex;
  align-items: center;
  gap: clamp(0.9rem, 2vw, 1.8rem);
}
.sb-line {
  flex: 1;
  height: 1px;
  background: var(--ink);
  opacity: 0.2;
  transform: scaleX(0);
  transition: transform 1s var(--ease) 0.15s;
}
.sb-line:first-child { transform-origin: right center; }
.sb-line:last-child { transform-origin: left center; }

.sb-text {
  flex: none;
  display: flex;
  align-items: center;
  gap: 0.85em;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.24em;
  color: var(--ink);
  white-space: nowrap;
}
.sb-seg {
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
.sb-dot {
  opacity: 0;
  color: var(--grey-strong);
  transition: opacity 0.5s var(--ease);
}

.sb-cols {
  width: min(100%, 720px);
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
}
.sb-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  padding-top: 0.55rem;
  border-top: 1px solid var(--line);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
.sb-col b {
  font-weight: 400;
  color: var(--grey-strong);
}
.sb-col em {
  font-style: normal;
  font-size: 0.86rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
  color: var(--ink);
}

.sb-ticks {
  width: min(100%, 560px);
  height: 6px;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, #000 6%, #000 94%, transparent);
  opacity: 0;
  transition: opacity 0.6s var(--ease);
}
.sb-ticks i {
  display: block;
  width: calc(100% + 60px);
  height: 100%;
  background-image:
    repeating-linear-gradient(to right, var(--ink) 0 1px, transparent 1px 60px),
    repeating-linear-gradient(to right, var(--ink) 0 1px, transparent 1px 12px);
  background-size: 60px 6px, 12px 3px;
  background-position: left bottom;
  background-repeat: repeat-x;
  animation: splashTicksRoll 1.35s linear infinite paused;
  opacity: 0.36;
}
.statusbar.is-running .sb-ticks i {
  animation-play-state: running;
}
@keyframes splashTicksRoll {
  to { transform: translateX(-60px); }
}
@media (prefers-reduced-motion: reduce) {
  .sb-ticks i { animation: none; }
}

#splash.phase-expand .statusbar { opacity: 1; }
#splash.phase-expand .sb-line { transform: scaleX(1); }
#splash.phase-expand .sb-seg,
#splash.phase-expand .sb-dot { opacity: 1; transform: translateY(0); }
#splash.phase-expand .sb-seg:nth-child(1) { transition-delay: 0.3s; }
#splash.phase-expand .sb-dot:nth-child(2) { transition-delay: 0.36s; }
#splash.phase-expand .sb-seg:nth-child(3) { transition-delay: 0.4s; }
#splash.phase-expand .sb-dot:nth-child(4) { transition-delay: 0.46s; }
#splash.phase-expand .sb-seg:nth-child(5) { transition-delay: 0.5s; }

#splash.phase-expand .sb-col { opacity: 1; transform: translateY(0); }
#splash.phase-expand .sb-col:nth-child(1) { transition-delay: 0.52s; }
#splash.phase-expand .sb-col:nth-child(2) { transition-delay: 0.57s; }
#splash.phase-expand .sb-col:nth-child(3) { transition-delay: 0.62s; }
#splash.phase-expand .sb-col:nth-child(4) { transition-delay: 0.67s; }
#splash.phase-expand .sb-col:nth-child(5) { transition-delay: 0.72s; }
#splash.phase-expand .sb-col:nth-child(6) { transition-delay: 0.77s; }

#splash.phase-expand .sb-ticks { opacity: 1; transition-delay: 0.8s; }

#splash.skip.phase-expand .splash-logo {
  transition-duration: 0.42s;
}

#splash.skip.phase-expand .splash-side {
  opacity: 0;
  transition: none;
}
#splash.skip.phase-expand .statusbar {
  opacity: 0;
  transition: none;
}

#splash.skip.phase-expand .splash-meta {
  transition-duration: 0.34s, 0.34s;
}
#splash.skip.phase-expand .panel {
  transition-duration: 0.3s, 0.3s;
}

@media (max-height: 820px) {
  .statusbar {
    --sb-gap: clamp(26px, 4vh, 52px);
    gap: 0.7rem;
  }
  .sb-cols { font-size: 0.58rem; }
  .sb-col { padding-top: 0.45rem; }
  .sb-col em { font-size: 0.78rem; }
  .sb-ticks { display: none; }
}

@media (max-width: 680px) {
  :root {
    --logo-base: clamp(96px, 26vw, 140px);
    --logo-expand: 1.45;
  }
  .splash-content {
    --meta-offset: calc(var(--logo-size) / 2 + 0.8rem);
    --stage-gap: 0.55rem;
  }
  .side-sub,
  .side-no { display: none; }
  .side-title { font-size: clamp(1rem, 3.8vw, 1.35rem); letter-spacing: 0.06em; }
  .splash-code { font-size: 0.74rem; }
  .statusbar { width: min(94vw, 420px); gap: 0.8rem; }
  .sb-text { font-size: 0.58rem; letter-spacing: 0.1em; gap: 0.45em; }
  .sb-cols { grid-template-columns: repeat(3, 1fr); gap: 0.5rem 0.4rem; font-size: 0.56rem; }
  .sb-col em { font-size: 0.74rem; }
  .sb-ticks { display: none; }
}

body.loading {
  overflow: hidden;
  height: 100vh;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 500;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--header-pad-y) var(--shell-pad);
  mix-blend-mode: difference;
  pointer-events: none;
}
.mark,
.header-actions {
  pointer-events: auto;
}

html[data-page="stage"] .mark {
  display: none;
}

.mark {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--blend-src);
}
.mark-logo {
  display: block;
  flex: none;
  width: 32px;
  height: 32px;
  object-fit: contain;
  filter: brightness(0) invert(1);
}
html[data-page="room"] .mark-logo { filter: var(--grid-invert); }
.mark-dot { color: var(--blend-src); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  margin-left: auto;
}

.menu-toggle {
  width: 42px;
  height: 42px;
  border: none;
  background: transparent;
  position: relative;
}
.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
  content: "";
  position: absolute;
  left: 8px;
  right: 8px;
  height: 1px;
  background: var(--blend-src);
  transition: transform 0.35s var(--ease), opacity 0.3s var(--ease), top 0.35s var(--ease);
}
.menu-toggle span { top: 20px; }
.menu-toggle span::before { top: -7px; }
.menu-toggle span::after { top: 7px; }

.menu-toggle[aria-expanded="true"] span { background: transparent; }
.menu-toggle[aria-expanded="true"] span::before {
  top: 0;
  transform: rotate(45deg);
  background: var(--ink);
}
.menu-toggle[aria-expanded="true"] span::after {
  top: 0;
  transform: rotate(-45deg);
  background: var(--ink);
}
.menu-toggle[aria-expanded="true"] { mix-blend-mode: normal; }

.theme-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: none;
  background: transparent;
  align-items: center;
  justify-content: center;
}
body.has-theme-toggle .theme-toggle { display: flex; }

.theme-toggle i {
  position: relative;
  width: 15px;
  height: 15px;
  border: 1px solid var(--blend-src);
  border-radius: 50%;
  overflow: hidden;
  transition: transform 0.45s var(--ease);
}

.theme-toggle i::after {
  content: "";
  position: absolute;
  inset: -1px 50% -1px -1px;
  background: var(--blend-src);
}
html[data-theme="dark"] .theme-toggle i {
  transform: rotate(180deg);
}

.overlay-nav {
  position: fixed;
  inset: 0;
  z-index: 400;
  background: var(--paper);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 8rem var(--shell-pad) 3rem;
  clip-path: circle(0% at calc(100% - 3rem) 3rem);
  visibility: hidden;
  transition: clip-path 0.7s var(--ease), visibility 0s linear 0.7s;
  pointer-events: none;
}
.overlay-nav.open {
  clip-path: circle(150% at calc(100% - 3rem) 3rem);
  visibility: visible;
  transition: clip-path 0.7s var(--ease), visibility 0s linear 0s;
  pointer-events: auto;
}

.overlay-list {
  list-style: none;
}
.overlay-list li {
  border-top: 1px solid var(--line);
  overflow: hidden;
}
.overlay-list li:last-child { border-bottom: 1px solid var(--line); }
.overlay-list a {
  display: flex;
  align-items: baseline;
  gap: 1.2rem;
  padding: 1.5rem 0;
  font-size: clamp(1.6rem, 5vw, 3.2rem);
  font-weight: 500;
  transition: transform 0.4s var(--ease), opacity 0.4s var(--ease);
}
.overlay-list a::before {
  content: attr(data-index);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--grey);
}
.overlay-list a:hover {
  transform: translateX(0.6rem);
  opacity: 0.55;
}

.overlay-foot {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--grey);
  letter-spacing: 0.05em;
}

main { position: relative; z-index: 1; }

section {
  padding: 8rem var(--shell-pad);
  max-width: var(--shell);
  margin: 0 auto;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2rem var(--shell-pad) 2.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--grey);
  border-top: 1px solid var(--line);
  max-width: var(--shell);
  margin: 0 auto;
}

body.leaving {
  overflow: hidden;
}

body.leaving .orbit-ring,
body.leaving .orbit-ticks,
body.leaving .orbit-planet-ring,
body.leaving .stage-logo-wrap,
body.leaving .stage-about,
body.leaving .stage-foot {
  opacity: 0;
  transition: opacity 0.26s var(--ease) 0.08s;
}

body.leaving .orbit-item:not(.is-travelling) .orbit-inner {
  opacity: 0;
  transition: opacity 0.2s var(--ease);
}

body.leaving .orbit-item.is-travelling .orbit-inner {
  visibility: hidden;
}

body.leaving .orbit-planet {
  opacity: 0;
  transition: opacity 0.22s var(--ease) 0.18s;
}

.travel {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 9997;
  margin: 0;
  width: max-content;
  pointer-events: none;
  transform-origin: 0 0;
  transform: translate(var(--sx0), var(--sy0)) rotate(var(--t0, 0deg));
  transition: transform var(--travel) var(--ease);
}

.travel.go {
  transform: translate(var(--title-left), var(--title-top)) rotate(0deg);
}
.travel-inner {
  display: grid;
  gap: 0.28rem;
  width: max-content;
}

.travel-inner {
  text-align: left;
}
.travel-inner > * {
  transform: translateX(var(--sx, 0px));
  transition: transform var(--travel) var(--ease);
}
.travel.go .travel-inner > * {
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .travel,
  .travel-inner > * {
    transition: none !important;
  }
  body.leaving .orbit-ring,
  body.leaving .orbit-ticks,
  body.leaving .orbit-planet-ring,
  body.leaving .orbit-planet,
  body.leaving .stage-logo-wrap,
  body.leaving .stage-about,
  body.leaving .stage-foot,
  body.leaving .orbit-inner {
    transition: none !important;
  }
}

.reveal-line,
.reveal-item {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal-line.is-visible,
.reveal-item.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 600px) {
  section { padding: 5rem var(--shell-pad); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    animation-delay: 0s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
    transition-delay: 0s !important;
  }

  .reveal-line,
  .reveal-item {
    opacity: 1;
    transform: none;
  }

  .code-cursor { animation: none !important; }

  .statusbar,
  .sb-line,
  .sb-seg,
  .sb-dot,
  .sb-col,
  .sb-ticks,
  .splash-side > span {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .statusbar {
    transform: translate(-50%, calc(var(--logo-size) * var(--logo-expand) / 2 + var(--sb-gap))) !important;
  }
  .sb-line { transform: scaleX(1) !important; }

  .deco .splash-grid { opacity: 0.045 !important; }
  .deco .fr { opacity: 0.55 !important; transform: translate(0, 0) !important; }

  .hud-v.flick { animation: none !important; }
  .hud-bar i { transition: none !important; }
}