:root {
  color-scheme: dark;
  --bg: #05070d;
  --panel: rgba(14, 19, 31, 0.94);
  --panel-strong: rgba(20, 27, 43, 0.98);
  --line: rgba(255, 255, 255, 0.18);
  --text: #f4f7fb;
  --muted: #9da3ad;
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --gold: #ffd166;
  --danger: #fb7185;
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.38);
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  overscroll-behavior: none;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  touch-action: pan-x pan-y;
  user-select: none;
  -webkit-text-size-adjust: 100%;
  -webkit-user-select: none;
}

button,
input,
select {
  font: inherit;
}

input,
textarea {
  user-select: text;
  -webkit-user-select: text;
}

button {
  border: 0;
  color: inherit;
}

[hidden] {
  display: none !important;
}

.app-shell {
  position: relative;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  min-height: 100%;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(180deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    radial-gradient(circle at 20% 12%, rgba(56, 189, 248, 0.08), transparent 28%),
    radial-gradient(circle at 82% 18%, rgba(255, 255, 255, 0.06), transparent 24%),
    #05070d;
  background-size: 208px 208px, 208px 208px, auto, auto, auto;
}

.app-shell::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(255, 255, 255, 0.5) 0 1px, transparent 1.4px),
    radial-gradient(circle, rgba(56, 189, 248, 0.36) 0 1px, transparent 1.6px);
  background-position: 0 0, 42px 68px;
  background-size: 86px 86px, 138px 138px;
  opacity: 0.18;
  pointer-events: none;
}

.snap-section {
  position: absolute;
  inset: 0;
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: transparent;
  opacity: 1;
  transform: translate3d(100%, 0, 0);
  transition: transform 360ms ease;
  -webkit-overflow-scrolling: touch;
  contain: layout paint style;
  backface-visibility: hidden;
  will-change: transform;
  pointer-events: none;
}

#homeSection {
  overflow: hidden;
}

#atlasSection,
#gravitySection,
#resourcesSection {
  overflow: hidden;
}

#homeSection { --section-order: 0; }
#atlasSection { --section-order: 1; }
#gravitySection { --section-order: 2; }
#resourcesSection { --section-order: 3; }

.snap-section.is-active {
  z-index: 1;
  pointer-events: auto;
}

.snap-section::before {
  display: none;
}

.top-command {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 12;
  display: grid;
  grid-template-columns: minmax(160px, 1fr) auto;
  align-items: start;
  gap: 20px;
  padding: max(18px, env(safe-area-inset-top)) 24px 10px;
  pointer-events: none;
}

.brand-lockup,
.top-menu button {
  pointer-events: auto;
}

.brand-lockup {
  display: grid;
  gap: 2px;
  justify-self: start;
  padding: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.brand-lockup strong {
  color: #fff;
  font-size: 24px;
  font-weight: 900;
  line-height: 1;
}

.brand-lockup span,
.top-menu span {
  color: rgba(255, 255, 255, 0.62);
  font-size: 11px;
}

.top-menu {
  display: grid;
  grid-template-columns: repeat(4, max-content);
  gap: 24px;
}

.top-menu button {
  display: grid;
  gap: 2px;
  padding: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.84);
  text-align: left;
  cursor: pointer;
}

.top-menu strong {
  font-size: 16px;
  font-weight: 900;
  line-height: 1;
}

.top-menu button.is-active strong,
.top-menu button.is-active span {
  color: var(--accent);
}

.section-content {
  position: relative;
  z-index: 1;
  display: grid;
  align-content: center;
  width: min(1120px, 100%);
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0 auto;
  padding: max(96px, env(safe-area-inset-top)) 92px max(54px, env(safe-area-inset-bottom)) 72px;
}

.section-kicker {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
}

.hero-content h1,
.module-preview h2 {
  margin: 0;
  color: var(--text);
  line-height: 1.05;
}

.hero-content {
  position: relative;
  align-content: start;
  justify-items: center;
  gap: 0;
  height: 100vh;
  height: 100dvh;
  min-height: 0;
  width: min(1500px, 100%);
  padding-top: max(92px, env(safe-area-inset-top));
  padding-bottom: 0;
  text-align: center;
}

.hero-copy-block {
  position: relative;
  z-index: 2;
  display: grid;
  justify-items: center;
  width: min(760px, 100%);
}

.hero-content h1 {
  max-width: 900px;
  font-size: clamp(38px, 5.1vw, 76px);
  font-weight: 900;
  letter-spacing: 0;
  line-height: 1.02;
}

.hero-copy,
.module-preview > p {
  max-width: 680px;
  margin: 16px 0 0;
  color: rgba(244, 247, 251, 0.78);
  font-size: 16px;
  line-height: 1.75;
}

.module-preview h2 {
  font-size: clamp(32px, 8vw, 68px);
}

.hero-copy {
  margin-right: auto;
  margin-left: auto;
}

.hero-orbit-stage {
  --solar-center-y: calc(100% + 16px);
  --orbit-fade-start: clamp(42px, 9vh, 96px);
  --orbit-fade-end: clamp(170px, 24vh, 230px);
  position: absolute;
  left: 50%;
  bottom: 0;
  width: min(1320px, 94vw);
  height: clamp(420px, calc(100dvh - 350px), 620px);
  min-height: 0;
  margin-top: 0;
  overflow: hidden;
  pointer-events: none;
  transform: translateX(-50%);
  contain: layout paint style;
  isolation: isolate;
  -webkit-mask-image: linear-gradient(
    to bottom,
    transparent 0,
    transparent var(--orbit-fade-start),
    rgba(0, 0, 0, 0.16) calc(var(--orbit-fade-start) + 34px),
    rgba(0, 0, 0, 0.68) calc(var(--orbit-fade-start) + 94px),
    #000 var(--orbit-fade-end)
  );
  mask-image: linear-gradient(
    to bottom,
    transparent 0,
    transparent var(--orbit-fade-start),
    rgba(0, 0, 0, 0.16) calc(var(--orbit-fade-start) + 34px),
    rgba(0, 0, 0, 0.68) calc(var(--orbit-fade-start) + 94px),
    #000 var(--orbit-fade-end)
  );
}

.hero-orbit-stage::before {
  content: "";
  position: absolute;
  left: 50%;
  top: var(--solar-center-y);
  width: min(760px, 70vw);
  height: min(360px, 28vh);
  border-radius: 50%;
  background: radial-gradient(ellipse at center, rgba(255, 209, 102, 0.1), rgba(56, 189, 248, 0.05) 44%, transparent 72%);
  transform: translate(-50%, -50%);
}

.solar-orbit {
  position: absolute;
  left: 50%;
  top: var(--solar-center-y);
  width: var(--orbit-size);
  height: var(--orbit-size);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.solar-orbit::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  border-top: 1px solid rgba(94, 234, 212, 0.2);
  opacity: 0.5;
}

.solar-planet {
  position: absolute;
  left: 50%;
  top: 50%;
  width: var(--planet-size);
  height: var(--planet-size);
  margin-top: calc(var(--planet-size) / -2);
  margin-left: calc(var(--planet-size) / -2);
  border-radius: 50%;
  background: var(--planet-fill);
  box-shadow: var(--planet-glow, 0 0 12px rgba(255, 255, 255, 0.14));
  transform: rotate(var(--orbit-start, 0deg)) translateY(calc(var(--orbit-size) / -2));
  animation: solar-planet-spin var(--orbit-speed, 28s) linear infinite;
  will-change: transform;
}

.orbit-mercury {
  --orbit-size: 270px;
  --orbit-speed: 15s;
  --orbit-start: 18deg;
  --planet-size: 12px;
  --planet-fill: radial-gradient(circle at 35% 25%, #e5e7eb, #8b8f98 62%, #343842);
}

.orbit-venus {
  --orbit-size: 360px;
  --orbit-speed: 22s;
  --orbit-start: 126deg;
  --planet-size: 20px;
  --planet-fill: radial-gradient(circle at 35% 25%, #ffe4a3, #d7a353 62%, #765124);
}

.orbit-earth {
  --orbit-size: 485px;
  --orbit-speed: 30s;
  --orbit-start: 252deg;
  --planet-size: 24px;
  --planet-fill: radial-gradient(circle at 32% 28%, #bfdbfe, #2563eb 48%, #14532d 72%);
  --planet-glow: 0 0 16px rgba(96, 165, 250, 0.36);
}

.orbit-mars {
  --orbit-size: 618px;
  --orbit-speed: 38s;
  --orbit-start: 312deg;
  --planet-size: 18px;
  --planet-fill: radial-gradient(circle at 35% 25%, #fecaca, #ef4444 58%, #7f1d1d);
}

.orbit-jupiter {
  --orbit-size: 790px;
  --orbit-speed: 52s;
  --orbit-start: 44deg;
  --planet-size: 48px;
  --planet-fill: radial-gradient(circle at 34% 24%, #f5d0a9, #b97856 48%, #704229 72%);
  --planet-glow: 0 0 18px rgba(251, 191, 36, 0.18);
}

.orbit-saturn {
  --orbit-size: 955px;
  --orbit-speed: 68s;
  --orbit-start: 205deg;
  --planet-size: 38px;
  --planet-fill: radial-gradient(circle at 34% 24%, #fde68a, #c08457 58%, #6f4528);
  --planet-glow: 0 0 16px rgba(253, 230, 138, 0.18);
}

.saturn::after {
  content: "";
  position: absolute;
  inset: 42% -36%;
  border: 2px solid rgba(255, 255, 255, 0.22);
  border-radius: 50%;
  transform: rotate(14deg);
}

.orbit-uranus {
  --orbit-size: 1075px;
  --orbit-speed: 84s;
  --orbit-start: 286deg;
  --planet-size: 30px;
  --planet-fill: radial-gradient(circle at 34% 24%, #d9f99d, #67e8f9 52%, #155e75);
  --planet-glow: 0 0 16px rgba(103, 232, 249, 0.22);
}

.orbit-neptune {
  --orbit-size: 1210px;
  --orbit-speed: 102s;
  --orbit-start: 146deg;
  --planet-size: 28px;
  --planet-fill: radial-gradient(circle at 34% 24%, #bfdbfe, #2563eb 56%, #1e1b4b);
  --planet-glow: 0 0 16px rgba(37, 99, 235, 0.24);
}

.hero-sun {
  position: absolute;
  left: 50%;
  top: var(--solar-center-y);
  width: clamp(128px, 13vw, 188px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 34% 22%, #fff9c4 0 18%, #facc15 42%, #f97316 70%, #7c2d12 100%);
  box-shadow:
    0 0 54px rgba(250, 204, 21, 0.32),
    0 0 96px rgba(249, 115, 22, 0.12);
  transform: translate(-50%, -50%);
}

@keyframes solar-planet-spin {
  to {
    transform: rotate(calc(var(--orbit-start, 0deg) + 360deg)) translateY(calc(var(--orbit-size) / -2));
  }
}

.page-arrow {
  position: fixed;
  top: 50%;
  z-index: 13;
  display: grid;
  place-items: center;
  width: 64px;
  height: 88px;
  border: 0;
  background: transparent;
  color: rgba(244, 247, 251, 0.88);
  font-size: 62px;
  line-height: 1;
  transform: translateY(-50%);
  cursor: pointer;
  text-shadow: 0 0 18px rgba(0, 0, 0, 0.55);
}

.page-arrow-left { left: 12px; }
.page-arrow-right { right: 12px; }

.page-arrow:disabled {
  cursor: not-allowed;
  opacity: 0.28;
}

.section-index {
  position: fixed;
  right: 28px;
  bottom: 44px;
  z-index: 13;
  display: flex;
  gap: 5px;
  color: rgba(244, 247, 251, 0.8);
  font-size: 12px;
  font-weight: 800;
}

#sectionIndexNumber {
  color: var(--accent);
  font-size: 56px;
  line-height: 0.85;
}

.preview-panel {
  position: relative;
  display: grid;
  gap: 14px;
  width: min(620px, 100%);
  margin-top: 28px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.07);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.preview-list {
  display: grid;
  gap: 10px;
}

.preview-object {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.16);
}

.preview-object strong,
.preview-object small {
  display: block;
}

.preview-object small {
  margin-top: 4px;
  color: var(--muted);
}

.object-mark {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: radial-gradient(circle at 34% 28%, #fff7c2, #ffd166 58%, #8f5b13);
  box-shadow: 0 0 22px rgba(255, 209, 102, 0.38);
}

.object-mark.blue {
  background: radial-gradient(circle at 34% 28%, #eff6ff, #93c5fd 58%, #1d4ed8);
  box-shadow: 0 0 22px rgba(147, 197, 253, 0.38);
}

.object-mark.violet {
  background: radial-gradient(circle at 34% 28%, #f5f3ff, #c4b5fd 58%, #6d28d9);
  box-shadow: 0 0 22px rgba(196, 181, 253, 0.38);
}

.launch-button {
  display: grid;
  gap: 3px;
  width: min(320px, 100%);
  min-height: 58px;
  margin-top: 22px;
  padding: 12px 16px;
  border: 1px solid rgba(56, 189, 248, 0.74);
  border-radius: 0;
  background: rgba(56, 189, 248, 0.1);
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.launch-button span {
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
}

.launch-button strong {
  font-size: 15px;
  font-weight: 900;
}

.module-info-layout {
  --module-gap: clamp(24px, 5vw, 78px);
  display: grid;
  grid-template-columns: minmax(340px, 1fr) minmax(340px, 1fr);
  align-items: center;
  gap: var(--module-gap);
  width: min(1120px, 100%);
  max-height: calc(100dvh - 136px);
}

.module-info-copy {
  grid-column: 1;
  grid-row: 1;
  display: grid;
  gap: 14px;
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
  z-index: 2;
  transition: opacity 260ms ease, transform 200ms ease, visibility 260ms ease;
  will-change: opacity, transform;
}

.module-info-copy h2 {
  margin: 0;
  font-size: clamp(34px, 4.3vw, 58px);
  line-height: 1;
  white-space: nowrap;
}

.module-info-copy > p {
  max-width: 520px;
  margin: 0;
  color: rgba(244, 247, 251, 0.78);
  font-size: 14px;
  line-height: 1.65;
}

.module-topic-list {
  display: grid;
  gap: 0;
  margin-top: 4px;
}

.module-topic-button {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 3px;
  min-height: 48px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.34);
  background: transparent;
  color: rgba(244, 247, 251, 0.74);
  text-align: left;
  cursor: pointer;
}

.module-topic-button strong {
  color: var(--text);
  font-size: clamp(22px, 2.3vw, 31px);
  font-weight: 900;
  white-space: nowrap;
}

.module-topic-button span {
  color: rgba(244, 247, 251, 0.6);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
  white-space: nowrap;
}

.module-topic-button.is-active strong,
.module-topic-button.is-active span {
  color: var(--accent);
}

.module-action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.module-visual {
  grid-column: 2;
  grid-row: 1;
  position: relative;
  display: grid;
  place-items: center;
  min-height: 380px;
  overflow: visible;
  opacity: 1;
  transform: translate3d(0, 0, 0);
  z-index: 1;
  transition: transform 660ms cubic-bezier(0.22, 1, 0.36, 1), opacity 320ms ease;
  will-change: transform;
  backface-visibility: hidden;
}

.module-visual::before {
  content: "";
  position: absolute;
  inset: 14%;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(56, 189, 248, 0.12), transparent 68%);
  opacity: 0.72;
}

.module-visual::after {
  display: none;
}

.module-visual-mark {
  position: relative;
  width: min(360px, 76%);
  aspect-ratio: 1;
  z-index: 1;
  border-radius: 50%;
  border: 1px solid rgba(94, 234, 212, 0.24);
  background:
    radial-gradient(circle at 50% 50%, transparent 0 48%, rgba(94, 234, 212, 0.16) 48.3% 48.7%, transparent 49.2%),
    radial-gradient(circle at 50% 50%, rgba(56, 189, 248, 0.07), transparent 66%);
  box-shadow:
    0 0 74px rgba(56, 189, 248, 0.14),
    0 0 140px rgba(56, 189, 248, 0.07),
    inset 0 0 54px rgba(94, 234, 212, 0.04);
}

.module-visual-mark::before,
.module-visual-mark::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
}

.module-detail-view {
  grid-column: 2;
  grid-row: 1;
  position: relative;
  display: grid;
  align-content: center;
  min-height: 360px;
  padding-left: 34px;
  border-left: 0;
  opacity: 1;
  visibility: hidden;
  pointer-events: none;
  z-index: 2;
  transition: visibility 0s linear 660ms;
}

.module-detail-view::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--accent);
  opacity: 0;
  transform: scaleY(0);
  transform-origin: center;
}

.module-detail-view .section-kicker,
.module-detail-view h3,
.module-detail-rule,
.module-detail-view p:last-child {
  opacity: 0;
}

.module-detail-view .section-kicker {
  transform: translateY(14px);
}

.module-detail-view h3 {
  position: relative;
  margin: 8px 0 0;
  color: var(--text);
  font-size: clamp(32px, 4vw, 56px);
  line-height: 1;
  white-space: nowrap;
  transform: translateY(26px);
}

.module-detail-rule {
  width: min(520px, 100%);
  margin-top: 22px;
  border-bottom: 1px dashed rgba(244, 247, 251, 0.64);
  transform: scaleX(0);
  transform-origin: left;
}

.module-detail-view p:last-child {
  max-width: 520px;
  margin: 16px 0 0;
  color: rgba(244, 247, 251, 0.76);
  font-size: 14px;
  line-height: 1.8;
  transform: translateY(-24px);
}

.module-back-button {
  position: fixed;
  right: 30px;
  bottom: 128px;
  z-index: 16;
  width: fit-content;
  min-width: 96px;
  min-height: 38px;
  margin: 0;
  padding: 7px 14px;
  border: 1px solid rgba(255, 255, 255, 0.34);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  font-weight: 900;
  cursor: pointer;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
}

.module-info-layout.is-detail-mode .module-info-copy {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateX(-40px);
  z-index: 0;
}

.module-info-layout.is-detail-mode .module-visual {
  grid-column: 2;
  transform: translate3d(calc(-100% - var(--module-gap)), 0, 0);
}

.module-info-layout.is-detail-mode .module-detail-view {
  grid-column: 2;
  grid-row: 1;
  visibility: visible;
  pointer-events: auto;
  transition-delay: 0s;
}

.module-info-layout.is-detail-mode .module-detail-view::before {
  animation: moduleGuideIn 300ms ease 280ms forwards;
}

.module-info-layout.is-detail-mode .module-detail-view .section-kicker {
  animation: moduleKickerIn 260ms ease 640ms forwards;
}

.module-info-layout.is-detail-mode .module-detail-view h3 {
  animation: moduleTitleIn 360ms cubic-bezier(0.22, 1, 0.36, 1) 700ms forwards;
}

.module-info-layout.is-detail-mode .module-detail-rule {
  animation: moduleRuleIn 300ms ease 280ms forwards;
}

.module-info-layout.is-detail-mode .module-detail-view p:last-child {
  animation: moduleTextIn 400ms cubic-bezier(0.22, 1, 0.36, 1) 760ms forwards;
}

.module-info-layout.is-detail-mode .module-back-button {
  animation: moduleBackIn 260ms ease 820ms forwards;
  pointer-events: auto;
}

@keyframes moduleGuideIn {
  to {
    opacity: 1;
    transform: scaleY(1);
  }
}

@keyframes moduleRuleIn {
  to {
    opacity: 1;
    transform: scaleX(1);
  }
}

@keyframes moduleKickerIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes moduleTitleIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes moduleTextIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes moduleBackIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.module-visual-atlas .module-visual-mark {
  background:
    radial-gradient(circle at 32% 37%, #facc15 0 14px, transparent 15px),
    radial-gradient(circle at 68% 31%, #60a5fa 0 11px, transparent 12px),
    radial-gradient(circle at 72% 67%, #a78bfa 0 24px, transparent 25px),
    radial-gradient(circle at 38% 70%, #fb7185 0 8px, transparent 9px),
    radial-gradient(circle at 56% 48%, rgba(94, 234, 212, 0.78) 0 5px, transparent 6px),
    radial-gradient(circle at 25% 58%, rgba(226, 232, 240, 0.82) 0 4px, transparent 5px),
    radial-gradient(circle at 81% 45%, rgba(226, 232, 240, 0.72) 0 3px, transparent 4px),
    radial-gradient(circle at 50% 50%, transparent 0 36%, rgba(255, 255, 255, 0.07) 36.3% 36.7%, transparent 37.2%),
    radial-gradient(circle at 50% 50%, transparent 0 58%, rgba(94, 234, 212, 0.16) 58.3% 58.7%, transparent 59.2%),
    radial-gradient(circle at 50% 50%, rgba(14, 165, 233, 0.12), transparent 68%);
}

.module-visual-atlas .module-visual-mark::before {
  inset: 12%;
  border: 1px solid rgba(255, 255, 255, 0.07);
}

.module-visual-atlas .module-visual-mark::after {
  inset: 27%;
  border: 1px solid rgba(94, 234, 212, 0.12);
}

.module-visual-gravity .module-visual-mark {
  background:
    radial-gradient(circle at 50% 50%, #fff7c2 0 19px, #facc15 20px 34px, rgba(249, 115, 22, 0.55) 35px 42px, transparent 43px),
    radial-gradient(circle at 31% 64%, #60a5fa 0 12px, transparent 13px),
    radial-gradient(circle at 74% 36%, #f59e0b 0 17px, transparent 18px),
    radial-gradient(circle at 63% 74%, #fb7185 0 8px, transparent 9px),
    radial-gradient(circle at 50% 50%, transparent 0 34%, rgba(255, 255, 255, 0.08) 34.3% 34.8%, transparent 35.3%),
    radial-gradient(circle at 50% 50%, transparent 0 55%, rgba(94, 234, 212, 0.16) 55.3% 55.8%, transparent 56.3%),
    radial-gradient(circle at 50% 50%, rgba(250, 204, 21, 0.12), transparent 66%);
  box-shadow:
    0 0 74px rgba(250, 204, 21, 0.16),
    0 0 150px rgba(250, 204, 21, 0.08),
    inset 0 0 52px rgba(56, 189, 248, 0.04);
}

.module-visual-gravity .module-visual-mark::before {
  inset: 18%;
  border: 1px solid rgba(255, 255, 255, 0.09);
}

.module-visual-gravity .module-visual-mark::after {
  inset: 32%;
  border: 1px solid rgba(94, 234, 212, 0.12);
}

@media (max-width: 760px) {
  .top-command {
    grid-template-columns: 1fr;
    gap: 10px;
    padding-right: 14px;
    padding-left: 14px;
  }

  .top-menu {
    grid-template-columns: repeat(4, max-content);
    gap: 12px;
  }

  .top-menu strong {
    font-size: 10px;
  }

  .top-menu span {
    font-size: 10px;
  }

  .section-content {
    padding-right: 18px;
    padding-left: 18px;
  }

  .module-info-layout {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .module-visual {
    display: none;
  }

  .module-info-copy {
    gap: 14px;
  }

  .module-info-copy h2 {
    font-size: clamp(32px, 10vw, 52px);
    white-space: normal;
  }

  .module-topic-button {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
    min-height: 54px;
  }

  .module-topic-button strong {
    font-size: 22px;
  }

  .module-info-layout.is-detail-mode {
    grid-template-columns: 1fr;
  }

  .module-info-layout.is-detail-mode .module-info-copy {
    display: none;
  }

  .module-info-layout.is-detail-mode .module-visual {
    display: none;
  }

  .module-info-layout.is-detail-mode .module-detail-view {
    grid-column: 1;
    grid-row: 1;
    min-height: 0;
  }

  .module-detail-view {
    grid-column: 1;
    align-content: start;
    min-height: 0;
    padding-left: 18px;
    transform: translateY(0);
  }

  .module-detail-view h3 {
    white-space: normal;
  }

  .module-back-button {
    position: static;
    justify-self: start;
    margin-bottom: 12px;
  }

  .hero-content {
    grid-template-columns: 1fr;
    align-content: start;
    gap: 14px;
    height: 100vh;
    height: 100dvh;
    padding-top: 112px;
    padding-bottom: 0;
    text-align: center;
  }

  .hero-copy-block {
    width: min(420px, 100%);
    justify-items: center;
  }

  .hero-content h1 {
    max-width: 460px;
    font-size: clamp(32px, 10vw, 48px);
  }

  .hero-copy {
    max-width: 360px;
    font-size: 14px;
    line-height: 1.6;
  }

  .hero-orbit-stage {
    --solar-center-y: calc(100% + 8px);
    justify-self: center;
    width: 110%;
    height: clamp(280px, calc(100dvh - 420px), 440px);
    min-height: 0;
  }

  .orbit-mercury {
    --orbit-size: 175px;
    --planet-size: 9px;
  }

  .orbit-venus {
    --orbit-size: 235px;
    --planet-size: 15px;
  }

  .orbit-earth {
    --orbit-size: 312px;
    --planet-size: 18px;
  }

  .orbit-mars {
    --orbit-size: 400px;
    --planet-size: 14px;
  }

  .orbit-jupiter {
    --orbit-size: 510px;
    --planet-size: 34px;
  }

  .orbit-saturn {
    --orbit-size: 615px;
    --planet-size: 28px;
  }

  .orbit-uranus {
    --orbit-size: 700px;
    --planet-size: 22px;
  }

  .orbit-neptune {
    --orbit-size: 785px;
    --planet-size: 20px;
  }

  .hero-sun {
    width: clamp(110px, 28vw, 148px);
  }

  .page-arrow {
    display: none;
  }

  .section-index {
    right: 16px;
    bottom: 20px;
  }

  #sectionIndexNumber {
    font-size: 38px;
  }
}