:root {
  color-scheme: dark;
  font-family:
    "Arial Narrow",
    "Roboto Condensed",
    "Helvetica Neue",
    Arial,
    sans-serif;
  font-synthesis: none;
  --ink: #f7f8ff;
  --muted: rgba(231, 237, 255, 0.61);
  --line: rgba(229, 235, 255, 0.17);
  --accent: #8ed8ff;
  --accent-rgb: 142, 216, 255;
  background: #03070d;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  overscroll-behavior: none;
  background: #03070d;
}

body {
  min-height: 100dvh;
  color: var(--ink);
}

button {
  font: inherit;
}

.experience {
  position: relative;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 72% 18%, rgba(var(--accent-rgb), 0.09), transparent 38%),
    #03070d;
  transition: background-color 900ms ease;
}

#gaia-canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
  touch-action: none;
  user-select: none;
}

.intro-layer {
  position: absolute;
  z-index: 10;
  inset: 0;
  display: block;
  overflow: hidden auto;
  scrollbar-width: none;
  color: #f8fbff;
  background: #02060b;
  opacity: 1;
  transition: opacity 520ms ease;
}

.intro-layer::-webkit-scrollbar {
  display: none;
}

.intro-layer[hidden] {
  display: none;
}

.intro-layer.is-closing {
  opacity: 0;
  pointer-events: none;
}

.intro-visual {
  position: absolute;
  z-index: 0;
  inset: -2%;
  width: 104%;
  height: 104%;
  object-fit: cover;
  object-position: center;
  filter: saturate(0.82) contrast(1.06) brightness(0.82);
  animation: intro-breathe 14s ease-in-out infinite alternate;
}

.intro-layer::before {
  position: absolute;
  z-index: 1;
  inset: 0;
  content: "";
  background:
    linear-gradient(
      90deg,
      rgba(1, 5, 10, 0.97) 0%,
      rgba(1, 5, 10, 0.89) 32%,
      rgba(1, 5, 10, 0.43) 63%,
      rgba(1, 5, 10, 0.12) 100%
    ),
    linear-gradient(180deg, rgba(2, 6, 12, 0.2), transparent 45%, rgba(1, 4, 9, 0.72));
}

.intro-layer::after {
  position: absolute;
  z-index: 1;
  inset: 0;
  pointer-events: none;
  content: "";
  opacity: 0.15;
  background-image: repeating-linear-gradient(
    0deg,
    transparent 0,
    transparent 3px,
    rgba(255, 255, 255, 0.035) 4px
  );
  mix-blend-mode: soft-light;
}

.intro-shell {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  width: min(890px, 72vw);
  min-height: 100%;
  padding:
    max(42px, env(safe-area-inset-top))
    44px
    max(42px, env(safe-area-inset-bottom))
    max(52px, env(safe-area-inset-left));
}

.intro-heading {
  display: flex;
  gap: 24px;
  align-items: center;
  justify-content: space-between;
  width: min(680px, 100%);
  margin-bottom: 24px;
}

.intro-kicker,
.intro-chapter {
  margin: 0;
  color: rgba(228, 240, 249, 0.62);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.intro-kicker {
  display: flex;
  gap: 10px;
  align-items: center;
}

.intro-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #a8f7e0;
  box-shadow: 0 0 18px rgba(135, 255, 221, 0.8);
}

.intro-chapter {
  font-family: Consolas, "Courier New", monospace;
}

.intro-layer h2 {
  max-width: 720px;
  margin: 0;
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: clamp(46px, 6.5vw, 92px);
  font-weight: 500;
  letter-spacing: -0.07em;
  line-height: 0.98;
  text-wrap: balance;
  text-shadow: 0 5px 40px rgba(0, 0, 0, 0.38);
}

.intro-lead {
  max-width: 620px;
  margin: 24px 0 0;
  color: rgba(239, 246, 250, 0.79);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: clamp(12px, 1.25vw, 16px);
  font-weight: 500;
  letter-spacing: 0.11em;
  line-height: 2;
}

.intro-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  width: min(760px, 100%);
  margin-top: 32px;
  border-top: 1px solid rgba(224, 240, 248, 0.18);
  border-bottom: 1px solid rgba(224, 240, 248, 0.18);
}

.intro-steps article {
  min-width: 0;
  padding: 17px 22px 17px 0;
}

.intro-steps article + article {
  padding-left: 22px;
  border-left: 1px solid rgba(224, 240, 248, 0.13);
}

.intro-steps span {
  display: block;
  margin-bottom: 11px;
  color: #99e8d3;
  font-family: Consolas, "Courier New", monospace;
  font-size: 8px;
  letter-spacing: 0.12em;
}

.intro-steps strong {
  display: block;
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.15em;
}

.intro-steps p {
  margin: 8px 0 0;
  color: rgba(226, 238, 245, 0.56);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: 9px;
  letter-spacing: 0.06em;
  line-height: 1.72;
}

.intro-footer {
  display: flex;
  gap: 20px;
  align-items: center;
  margin-top: 26px;
}

.intro-enter {
  display: inline-flex;
  gap: 34px;
  align-items: center;
  justify-content: space-between;
  min-width: 210px;
  min-height: 50px;
  padding: 0 18px 0 21px;
  border: 1px solid rgba(183, 255, 234, 0.72);
  border-radius: 999px;
  color: #03100e;
  background: #b6f8e5;
  box-shadow: 0 0 40px rgba(110, 255, 216, 0.12);
  cursor: pointer;
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.13em;
  transition:
    color 180ms ease,
    background-color 180ms ease,
    box-shadow 180ms ease,
    transform 180ms ease;
}

.intro-enter:hover,
.intro-enter:focus-visible {
  color: #fff;
  background: rgba(124, 244, 211, 0.15);
  box-shadow: 0 0 44px rgba(110, 255, 216, 0.2);
  outline: none;
  transform: translateY(-1px);
}

.intro-footer p {
  margin: 0;
  color: rgba(224, 238, 244, 0.43);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: 8px;
  letter-spacing: 0.12em;
  line-height: 1.65;
}

.experience::before {
  position: absolute;
  z-index: 1;
  inset: 0;
  pointer-events: none;
  content: "";
  background:
    linear-gradient(
      180deg,
      rgba(1, 4, 9, 0.42),
      transparent 23%,
      transparent 68%,
      rgba(1, 4, 9, 0.5)
    ),
    radial-gradient(circle at center, transparent 42%, rgba(1, 3, 8, 0.34) 100%);
}

.experience::after {
  position: absolute;
  z-index: 2;
  inset: 0;
  pointer-events: none;
  content: "";
  opacity: 0.13;
  background-image: repeating-linear-gradient(
    0deg,
    transparent 0,
    transparent 3px,
    rgba(255, 255, 255, 0.026) 4px
  );
  mix-blend-mode: soft-light;
}

.masthead {
  position: absolute;
  z-index: 3;
  top: max(24px, env(safe-area-inset-top));
  left: max(28px, env(safe-area-inset-left));
  pointer-events: none;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  gap: 9px;
  align-items: center;
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.22em;
}

.live-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 15px rgba(var(--accent-rgb), 0.88);
  animation: live-pulse 2.8s ease-in-out infinite;
}

h1 {
  margin: 0;
  font-size: clamp(28px, 3.7vw, 56px);
  font-stretch: condensed;
  font-weight: 510;
  letter-spacing: -0.055em;
  line-height: 0.9;
  text-shadow: 0 2px 28px rgba(1, 3, 9, 0.55);
}

.title-ja {
  margin: 11px 0 0;
  color: var(--muted);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.25em;
}

.status {
  position: absolute;
  z-index: 3;
  top: max(29px, env(safe-area-inset-top));
  right: max(28px, env(safe-area-inset-right));
  display: flex;
  gap: 8px;
  align-items: center;
  color: rgba(233, 238, 255, 0.47);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.14em;
  pointer-events: none;
}

.status span {
  padding: 7px 9px 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(5, 9, 18, 0.3);
  backdrop-filter: blur(10px);
}

.guide {
  position: absolute;
  z-index: 3;
  top: 50%;
  left: 50%;
  width: min(84vw, 430px);
  pointer-events: none;
  transform: translate(-50%, -50%);
  text-align: center;
  transition:
    opacity 800ms ease,
    transform 800ms ease;
}

.guide-kicker {
  margin: 0 0 8px;
  color: rgba(234, 239, 255, 0.42);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.25em;
}

.guide-copy {
  margin: 0;
  color: rgba(248, 249, 255, 0.91);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.touch-copy {
  display: none;
}

.has-interacted .guide,
.is-auto .guide {
  opacity: 0;
  transform: translate(-50%, calc(-50% + 8px));
}

.mode-caption {
  position: absolute;
  z-index: 3;
  left: max(28px, env(safe-area-inset-left));
  bottom: max(96px, calc(env(safe-area-inset-bottom) + 82px));
  display: grid;
  grid-template-columns: 50px minmax(0, 1fr);
  gap: 15px;
  width: min(430px, 38vw);
  pointer-events: none;
  text-shadow: 0 2px 20px rgba(1, 3, 9, 0.75);
}

.mode-index {
  display: flex;
  gap: 4px;
  align-items: baseline;
  padding-top: 4px;
  color: rgba(232, 237, 255, 0.38);
  font-family: Consolas, "Courier New", monospace;
  font-size: 9px;
  letter-spacing: 0.08em;
}

.mode-index span:first-child {
  color: var(--accent);
  font-size: 15px;
}

.mode-copy h2 {
  margin: 0;
  font-size: clamp(20px, 2.1vw, 30px);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 1;
  text-transform: uppercase;
}

.mode-title-ja {
  margin: 8px 0 0;
  color: rgba(241, 244, 255, 0.72);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.17em;
}

.mode-description {
  max-width: 360px;
  margin: 12px 0 0;
  color: rgba(225, 232, 252, 0.5);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: 10px;
  line-height: 1.75;
}

.mode-nav {
  position: absolute;
  z-index: 4;
  bottom: max(23px, calc(env(safe-area-inset-bottom) + 11px));
  left: 50%;
  display: flex;
  gap: 8px;
  align-items: center;
  max-width: min(620px, calc(100vw - 360px));
  transform: translateX(-50%);
}

.mode-list {
  display: flex;
  gap: 3px;
  align-items: center;
  padding: 4px;
  border: 1px solid rgba(229, 235, 255, 0.13);
  border-radius: 999px;
  background: rgba(4, 8, 16, 0.38);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.16);
  backdrop-filter: blur(14px);
}

.mode-button,
.mode-arrow {
  display: grid;
  width: 31px;
  height: 31px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  color: rgba(229, 235, 255, 0.38);
  background: transparent;
  cursor: pointer;
  place-items: center;
  transition:
    color 220ms ease,
    background-color 220ms ease,
    box-shadow 220ms ease,
    transform 220ms ease;
}

.mode-button {
  position: relative;
  font-family: Consolas, "Courier New", monospace;
  font-size: 8px;
  letter-spacing: -0.03em;
}

.mode-button::after {
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--accent);
  content: "";
  opacity: 0;
  transform: translateX(-50%);
  box-shadow: 0 0 8px rgba(var(--accent-rgb), 0.8);
}

.mode-button:hover,
.mode-button:focus-visible,
.mode-arrow:hover,
.mode-arrow:focus-visible {
  color: #fff;
  background: rgba(255, 255, 255, 0.055);
  outline: none;
}

.mode-button[aria-current="true"] {
  color: #fff;
  background: rgba(var(--accent-rgb), 0.12);
  box-shadow: inset 0 0 0 1px rgba(var(--accent-rgb), 0.28);
  transform: scale(1.07);
}

.mode-button[aria-current="true"]::after {
  opacity: 1;
}

.mode-arrow {
  width: 36px;
  height: 36px;
  border: 1px solid rgba(229, 235, 255, 0.13);
  background: rgba(4, 8, 16, 0.28);
  font-size: 14px;
  backdrop-filter: blur(12px);
}

.actions {
  position: absolute;
  z-index: 4;
  right: max(28px, env(safe-area-inset-right));
  bottom: max(25px, calc(env(safe-area-inset-bottom) + 12px));
  display: flex;
  gap: 8px;
  align-items: center;
}

.intro-button,
.auto-button,
.source-button,
.reset-button {
  display: inline-flex;
  gap: 7px;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: rgba(244, 246, 255, 0.69);
  background: rgba(5, 9, 18, 0.34);
  backdrop-filter: blur(12px);
  cursor: pointer;
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  transition:
    color 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease,
    box-shadow 180ms ease;
}

.intro-button:hover,
.intro-button:focus-visible,
.auto-button:hover,
.auto-button:focus-visible,
.source-button:hover,
.source-button:focus-visible,
.reset-button:hover,
.reset-button:focus-visible {
  color: #fff;
  border-color: rgba(234, 229, 255, 0.45);
  background: rgba(18, 24, 38, 0.58);
  outline: none;
}

.auto-button[aria-pressed="true"] {
  color: #fff;
  border-color: rgba(var(--accent-rgb), 0.36);
  background: rgba(var(--accent-rgb), 0.1);
  box-shadow: 0 0 22px rgba(var(--accent-rgb), 0.08);
}

.action-icon {
  display: inline-grid;
  min-width: 13px;
  font-size: 14px;
  font-weight: 400;
  line-height: 1;
  place-items: center;
}

.intro-icon {
  width: 14px;
  font-family: Georgia, serif;
  font-size: 13px;
  font-style: italic;
  text-transform: lowercase;
}

.source-icon {
  font-family: Consolas, "Courier New", monospace;
  font-size: 10px;
  letter-spacing: -0.12em;
}

.reset-icon {
  font-size: 15px;
}

.source-scrim {
  position: absolute;
  z-index: 5;
  inset: 0;
  border: 0;
  opacity: 0;
  visibility: hidden;
  background: rgba(1, 3, 8, 0.53);
  backdrop-filter: blur(3px);
  cursor: default;
  transition:
    opacity 260ms ease,
    visibility 260ms step-end;
}

.source-panel {
  position: absolute;
  z-index: 6;
  top: 0;
  right: 0;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  width: min(620px, 48vw);
  height: 100%;
  padding-top: env(safe-area-inset-top);
  padding-right: env(safe-area-inset-right);
  border-left: 1px solid rgba(229, 235, 255, 0.15);
  background: rgba(3, 6, 13, 0.95);
  box-shadow: -28px 0 80px rgba(0, 0, 0, 0.32);
  backdrop-filter: blur(24px);
  transform: translateX(102%);
  visibility: hidden;
  transition:
    transform 340ms cubic-bezier(0.22, 0.8, 0.24, 1),
    visibility 340ms step-end;
}

.source-open .source-scrim,
.source-scrim[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
  transition:
    opacity 260ms ease,
    visibility 0ms step-start;
}

.source-open .source-panel,
.source-panel[aria-hidden="false"] {
  transform: translateX(0);
  visibility: visible;
  transition:
    transform 340ms cubic-bezier(0.22, 0.8, 0.24, 1),
    visibility 0ms step-start;
}

.source-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 94px;
  padding: 21px 22px 18px 26px;
  border-bottom: 1px solid rgba(229, 235, 255, 0.11);
}

.source-kicker {
  margin: 0 0 7px;
  color: rgba(234, 239, 255, 0.4);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.23em;
}

.source-header h2 {
  margin: 0;
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.035em;
  text-transform: uppercase;
}

.source-close {
  display: grid;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: rgba(244, 246, 255, 0.75);
  background: rgba(255, 255, 255, 0.025);
  cursor: pointer;
  place-items: center;
}

.source-close:hover,
.source-close:focus-visible {
  color: #fff;
  border-color: rgba(234, 229, 255, 0.46);
  outline: none;
}

.source-close span {
  font-family: Arial, sans-serif;
  font-size: 21px;
  font-weight: 300;
  line-height: 1;
}

.source-meta {
  display: flex;
  justify-content: space-between;
  padding: 10px 26px;
  border-bottom: 1px solid rgba(229, 235, 255, 0.075);
  color: rgba(221, 227, 248, 0.39);
  font-family: Consolas, "Courier New", monospace;
  font-size: 8px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.source-pre {
  min-height: 0;
  margin: 0;
  padding: 19px 0 32px;
  overflow: auto;
  overscroll-behavior: contain;
  color: #d8def7;
  background:
    linear-gradient(90deg, rgba(var(--accent-rgb), 0.025), transparent 40%),
    rgba(1, 3, 8, 0.2);
  font-family: Consolas, "SFMono-Regular", "Courier New", monospace;
  font-size: 11px;
  line-height: 1.72;
  tab-size: 2;
  scrollbar-color: rgba(var(--accent-rgb), 0.2) transparent;
}

.source-pre:focus-visible {
  outline: 1px solid rgba(var(--accent-rgb), 0.34);
  outline-offset: -1px;
}

#source-code {
  display: block;
  min-width: max-content;
  counter-reset: source-line;
}

.code-line {
  display: block;
  min-height: 1.72em;
  padding: 0 25px 0 0;
  counter-increment: source-line;
  white-space: pre;
}

.code-line::before {
  display: inline-block;
  width: 43px;
  margin-right: 17px;
  color: rgba(208, 214, 241, 0.23);
  content: counter(source-line);
  text-align: right;
  user-select: none;
}

.code-line:hover {
  background: rgba(var(--accent-rgb), 0.032);
}

.error-panel {
  position: absolute;
  z-index: 8;
  top: 50%;
  left: 50%;
  width: min(86vw, 440px);
  margin: 0;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 16px;
  background: rgba(4, 7, 14, 0.88);
  backdrop-filter: blur(16px);
  transform: translate(-50%, -50%);
  text-align: center;
}

.error-panel p {
  margin: 0 0 8px;
  font-size: 15px;
}

.error-panel small {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.7;
}

@keyframes live-pulse {
  0%,
  100% {
    opacity: 0.4;
    transform: scale(0.78);
  }
  50% {
    opacity: 1;
    transform: scale(1.08);
  }
}

@keyframes intro-breathe {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.025);
  }
}

@media (max-width: 1080px) {
  .mode-caption {
    bottom: max(90px, calc(env(safe-area-inset-bottom) + 76px));
    grid-template-columns: 43px minmax(0, 1fr);
    gap: 11px;
    width: min(350px, 42vw);
  }

  .mode-description {
    display: -webkit-box;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
  }

  .mode-nav {
    max-width: none;
  }
}

@media (pointer: coarse), (max-width: 720px) {
  .intro-layer::before {
    background:
      linear-gradient(
        180deg,
        rgba(1, 5, 10, 0.48) 0%,
        rgba(1, 5, 10, 0.62) 28%,
        rgba(1, 5, 10, 0.92) 67%,
        rgba(1, 5, 10, 0.98) 100%
      ),
      linear-gradient(90deg, rgba(1, 5, 10, 0.65), transparent 80%);
  }

  .intro-visual {
    object-position: 66% center;
    filter: saturate(0.8) contrast(1.05) brightness(0.68);
  }

  .intro-shell {
    width: 100%;
    min-height: 100dvh;
    padding:
      max(24px, env(safe-area-inset-top))
      max(20px, env(safe-area-inset-right))
      max(25px, calc(env(safe-area-inset-bottom) + 10px))
      max(20px, env(safe-area-inset-left));
  }

  .intro-heading {
    margin-bottom: 15px;
  }

  .intro-kicker,
  .intro-chapter {
    font-size: 7px;
    letter-spacing: 0.18em;
  }

  .intro-layer h2 {
    max-width: 340px;
    font-size: clamp(40px, 12.4vw, 54px);
    letter-spacing: -0.075em;
  }

  .intro-lead {
    max-width: 340px;
    margin-top: 17px;
    font-size: 10px;
    letter-spacing: 0.08em;
    line-height: 1.78;
  }

  .intro-steps {
    margin-top: 20px;
  }

  .intro-steps article {
    padding: 13px 10px 13px 0;
  }

  .intro-steps article + article {
    padding-left: 10px;
  }

  .intro-steps span {
    margin-bottom: 8px;
    font-size: 7px;
  }

  .intro-steps strong {
    font-size: 10px;
    letter-spacing: 0.1em;
  }

  .intro-steps p {
    margin-top: 6px;
    font-size: 8px;
    line-height: 1.55;
  }

  .intro-footer {
    flex-direction: column;
    gap: 10px;
    align-items: flex-start;
    margin-top: 18px;
  }

  .intro-enter {
    min-width: 190px;
    min-height: 46px;
    font-size: 10px;
  }

  .intro-footer p {
    font-size: 7px;
  }

  .masthead {
    top: max(21px, env(safe-area-inset-top));
    left: max(20px, env(safe-area-inset-left));
  }

  h1 {
    max-width: 190px;
    font-size: 27px;
  }

  .title-ja {
    margin-top: 9px;
    font-size: 8px;
  }

  .status {
    display: none;
  }

  .guide {
    top: 46%;
  }

  .desktop-copy {
    display: none;
  }

  .touch-copy {
    display: inline;
  }

  .mode-caption {
    right: max(20px, env(safe-area-inset-right));
    bottom: max(87px, calc(env(safe-area-inset-bottom) + 74px));
    left: max(20px, env(safe-area-inset-left));
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 9px;
    width: auto;
  }

  .mode-copy h2 {
    font-size: 19px;
  }

  .mode-title-ja {
    margin-top: 6px;
    font-size: 9px;
  }

  .mode-description {
    max-width: 290px;
    margin-top: 8px;
    font-size: 9px;
    line-height: 1.55;
  }

  .mode-nav {
    right: max(14px, env(safe-area-inset-right));
    bottom: max(15px, calc(env(safe-area-inset-bottom) + 6px));
    left: max(14px, env(safe-area-inset-left));
    width: auto;
    transform: none;
  }

  .mode-list {
    flex: 1;
    justify-content: space-between;
    min-width: 0;
  }

  .mode-button {
    width: 28px;
    height: 28px;
  }

  .mode-arrow {
    display: none;
  }

  .actions {
    top: max(20px, env(safe-area-inset-top));
    right: max(18px, env(safe-area-inset-right));
    bottom: auto;
    gap: 5px;
  }

  .intro-button,
  .auto-button,
  .source-button,
  .reset-button {
    width: 38px;
    min-height: 38px;
    padding: 0;
  }

  .button-label {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }

  .source-panel {
    top: auto;
    bottom: 0;
    width: 100%;
    height: min(74dvh, 690px);
    padding-top: 0;
    padding-bottom: env(safe-area-inset-bottom);
    border-top: 1px solid rgba(229, 235, 255, 0.15);
    border-left: 0;
    border-radius: 22px 22px 0 0;
    transform: translateY(102%);
  }

  .source-open .source-panel,
  .source-panel[aria-hidden="false"] {
    transform: translateY(0);
  }

  .source-header {
    min-height: 82px;
    padding: 17px 18px 15px 21px;
  }

  .source-header h2 {
    font-size: 18px;
  }

  .source-meta {
    padding-inline: 21px;
  }

  .source-pre {
    font-size: 10px;
  }

  .code-line::before {
    width: 35px;
    margin-right: 13px;
  }
}

@media (max-width: 430px) {
  .mode-button {
    width: 26px;
    height: 26px;
    font-size: 7px;
  }

  .mode-list {
    gap: 1px;
  }
}

@media (max-height: 560px) and (orientation: landscape) {
  .intro-shell {
    width: min(760px, 76vw);
    padding-block: 19px;
  }

  .intro-heading {
    margin-bottom: 8px;
  }

  .intro-layer h2 {
    font-size: 31px;
  }

  .intro-lead {
    max-width: 550px;
    margin-top: 8px;
    line-height: 1.5;
  }

  .intro-steps {
    margin-top: 10px;
  }

  .intro-steps article {
    padding-block: 8px;
  }

  .intro-steps p {
    display: none;
  }

  .intro-footer {
    flex-direction: row;
    margin-top: 10px;
  }

  .intro-enter {
    min-height: 40px;
  }

  .title-ja,
  .mode-description,
  .status {
    display: none;
  }

  .mode-caption {
    bottom: 66px;
  }

  .mode-nav {
    bottom: max(10px, env(safe-area-inset-bottom));
  }
}

@media (prefers-reduced-motion: reduce) {
  .live-dot {
    animation: none;
  }

  .intro-visual {
    animation: none;
  }

  .intro-layer,
  .intro-enter,
  .guide,
  .mode-button,
  .mode-arrow,
  .intro-button,
  .auto-button,
  .source-button,
  .reset-button,
  .source-scrim,
  .source-panel {
    transition-duration: 0.01ms;
  }
}