/* =====================================================================
   Alune · Moonlight Dialogs — board chrome
   Used only for displaying this design board; it is not part of the product component layer (see dialog.css for that).
   ===================================================================== */

:root {
  --board-bg: #edf1f9;
  --board-ink: #111c36;
  --board-muted: #56648a;
  --board-faint: #7d8bab;
  --board-hair: rgb(35 52 102 / 9%);
  --board-hair-strong: rgb(35 52 102 / 15%);
  --bz-shell: rgb(255 255 255 / 44%);
  --bz-ring: rgb(35 52 102 / 8%);
  --bz-hi: rgb(255 255 255 / 92%);
  --bz-core: #fbfcff;
  --bz-core-ring: rgb(35 52 102 / 7%);
  --bz-shadow: 0 1px 1px rgb(30 45 95 / 3%), 0 28px 64px -36px rgb(30 45 95 / 26%);
  --island-bg: rgb(250 252 255 / 64%);
  --island-ring: rgb(35 52 102 / 10%);
  --menu-bg: rgb(237 241 249 / 78%);
  --orb-1: rgb(110 134 232 / 30%);
  --orb-2: rgb(143 227 238 / 34%);
  --orb-3: rgb(166 146 244 / 15%);
  --grain-opacity: 0.05;
  --sk-side: #e2e8f4;
  --sk-main: #eef2f9;
  --sk-panel: #f7f9fd;
  --sk-bar: rgb(35 52 102 / 8%);
  --sk-bar-strong: rgb(35 52 102 / 12%);
  --sk-add: rgb(15 109 86 / 10%);
  --sk-del: rgb(173 59 73 / 9%);
  --sk-accent: rgb(65 90 176 / 18%);
  --z-bg: 0;
  --z-main: 1;
  --z-nav: 40;
  --z-menu: 50;
  --z-grain: 80;
}
[data-theme='dark'] {
  --board-bg: #0a1120;
  --board-ink: #eef3ff;
  --board-muted: #a5b5d8;
  --board-faint: #7384aa;
  --board-hair: rgb(175 198 255 / 9%);
  --board-hair-strong: rgb(175 198 255 / 16%);
  --bz-shell: rgb(175 198 255 / 4%);
  --bz-ring: rgb(175 198 255 / 10%);
  --bz-hi: rgb(214 228 255 / 8%);
  --bz-core: #0f1829;
  --bz-core-ring: rgb(175 198 255 / 8%);
  --bz-shadow: 0 1px 1px rgb(0 0 0 / 30%), 0 30px 70px -36px rgb(0 0 0 / 72%);
  --island-bg: rgb(16 24 42 / 60%);
  --island-ring: rgb(175 198 255 / 13%);
  --menu-bg: rgb(8 13 26 / 80%);
  --orb-1: rgb(110 134 232 / 24%);
  --orb-2: rgb(143 227 238 / 11%);
  --orb-3: rgb(150 120 255 / 12%);
  --grain-opacity: 0.075;
  --sk-side: #0e1627;
  --sk-main: #121b2d;
  --sk-panel: #17223a;
  --sk-bar: rgb(175 198 255 / 7%);
  --sk-bar-strong: rgb(175 198 255 / 11%);
  --sk-add: rgb(176 229 204 / 8%);
  --sk-del: rgb(255 183 192 / 8%);
  --sk-accent: rgb(175 198 255 / 16%);
}

/* ---------------------------------------------------------------------
   Base
   --------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  background: var(--board-bg);
  scroll-behavior: smooth;
  scroll-padding-top: 104px;
  scrollbar-gutter: stable;
}
html.is-locked {
  overflow: hidden;
}
body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  color: var(--board-ink);
  background: var(--board-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}
::selection {
  background: rgb(110 134 232 / 28%);
}
a {
  color: inherit;
}
button {
  font: inherit;
  color: inherit;
}
h1,
h2,
h3,
h4,
p {
  margin: 0;
}
.mono {
  font-family: var(--font-mono);
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 460ms;
  animation-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Background: fixed orbs + starfield (dark) + grain (fixed pseudo-element) */
.bg {
  position: fixed;
  inset: 0;
  z-index: var(--z-bg);
  overflow: hidden;
  pointer-events: none;
}
.bg i {
  position: absolute;
  border-radius: 50%;
}
.bg i:nth-child(1) {
  top: -26vmax;
  right: -16vmax;
  width: 66vmax;
  height: 66vmax;
  background: radial-gradient(closest-side, var(--orb-1), transparent 72%);
  animation: drift-a 28s var(--ease-orbit) infinite alternate;
}
.bg i:nth-child(2) {
  bottom: -24vmax;
  left: -14vmax;
  width: 54vmax;
  height: 54vmax;
  background: radial-gradient(closest-side, var(--orb-2), transparent 70%);
  animation: drift-b 34s var(--ease-orbit) infinite alternate;
}
.bg i:nth-child(3) {
  top: 38%;
  left: 36%;
  width: 38vmax;
  height: 38vmax;
  background: radial-gradient(closest-side, var(--orb-3), transparent 70%);
  animation: drift-a 40s var(--ease-orbit) infinite alternate-reverse;
}
.bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(1px 1px at 12% 18%, rgb(214 228 255 / 70%), transparent 60%),
    radial-gradient(1px 1px at 78% 12%, rgb(214 228 255 / 60%), transparent 60%),
    radial-gradient(1.5px 1.5px at 64% 32%, rgb(143 227 238 / 70%), transparent 60%),
    radial-gradient(1px 1px at 32% 72%, rgb(214 228 255 / 50%), transparent 60%),
    radial-gradient(1px 1px at 88% 64%, rgb(214 228 255 / 55%), transparent 60%),
    radial-gradient(1.5px 1.5px at 22% 44%, rgb(175 198 255 / 55%), transparent 60%),
    radial-gradient(1px 1px at 52% 88%, rgb(214 228 255 / 45%), transparent 60%),
    radial-gradient(1px 1px at 94% 36%, rgb(143 227 238 / 50%), transparent 60%);
  opacity: 0;
  transition: opacity 600ms var(--ease-enter);
}
[data-theme='dark'] .bg::before {
  opacity: 1;
}
@keyframes drift-a {
  to {
    transform: translate3d(-6vmax, 5vmax, 0) scale(1.08);
  }
}
@keyframes drift-b {
  to {
    transform: translate3d(7vmax, -4vmax, 0) scale(1.12);
  }
}
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: var(--z-grain);
  pointer-events: none;
  opacity: var(--grain-opacity);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .42 0 0 0 0 .48 0 0 0 0 .66 0 0 0 1.1 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------------------------------------------------------------------
   Floating island nav + hamburger + full-screen menu
   --------------------------------------------------------------------- */
.island {
  position: fixed;
  top: 16px;
  left: 50%;
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  gap: 2px;
  max-width: calc(100vw - 24px);
  height: 54px;
  padding: 6px;
  border-radius: 999px;
  background: var(--island-bg);
  -webkit-backdrop-filter: blur(22px) saturate(1.5);
  backdrop-filter: blur(22px) saturate(1.5);
  box-shadow: inset 0 0 0 1px var(--island-ring), inset 0 1px 0 var(--bz-hi), 0 14px 36px -18px rgb(20 30 70 / 34%);
  transform: translateX(-50%);
  animation: island-in 1000ms var(--ease-spring) 120ms both;
}
@keyframes island-in {
  from {
    opacity: 0;
    transform: translate(-50%, -28px);
  }
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 42px;
  padding: 0 14px 0 6px;
  border-radius: 999px;
  text-decoration: none;
  white-space: nowrap;
}
.brand strong {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.brand small {
  font-size: 12px;
  color: var(--board-muted);
}
.moon-mark {
  position: relative;
  flex: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: radial-gradient(circle at 34% 30%, #ffffff, #d7e1ff 42%, #8ea2f0 78%, #6e86e8);
  box-shadow: 0 0 0 1px rgb(110 134 232 / 25%), 0 0 18px rgb(143 227 238 / 45%);
  -webkit-mask: radial-gradient(circle at 76% 28%, transparent 34%, #000 35.5%);
  mask: radial-gradient(circle at 76% 28%, transparent 34%, #000 35.5%);
}
.island-links {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0 4px;
  padding: 0 6px;
  box-shadow: inset 1px 0 0 var(--board-hair), inset -1px 0 0 var(--board-hair);
}
.island-links a {
  position: relative;
  isolation: isolate;
  display: grid;
  place-items: center;
  height: 40px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--board-muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--t-hover) var(--ease-enter);
}
.island-links a::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  background: var(--hover-veil);
  box-shadow: inset 0 0 0 1px var(--board-hair);
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 220ms var(--ease-enter), transform 380ms var(--ease-spring);
}
.island-links a:hover {
  color: var(--board-ink);
}
.island-links a[aria-current='true'] {
  color: var(--board-ink);
}
.island-links a[aria-current='true']::before {
  opacity: 1;
  transform: none;
}
.island-tools {
  display: flex;
  align-items: center;
  gap: 2px;
}
.round-btn {
  position: relative;
  isolation: isolate;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  color: var(--board-muted);
  background: transparent;
  cursor: pointer;
  transition: transform var(--t-press) var(--ease-enter), color var(--t-hover) var(--ease-enter);
}
.round-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  background: var(--hover-veil);
  box-shadow: inset 0 0 0 1px var(--board-hair);
  opacity: 0;
  transition: opacity var(--t-hover) var(--ease-enter);
}
.round-btn:hover {
  color: var(--board-ink);
}
.round-btn:hover::before {
  opacity: 1;
}
.round-btn:active {
  transform: scale(0.92);
}
.round-btn .ic {
  width: 18px;
  height: 18px;
}
.round-btn .ic-sun,
[data-theme='dark'] .round-btn .ic-moon {
  display: none;
}
[data-theme='dark'] .round-btn .ic-sun {
  display: block;
}
.round-btn[aria-pressed='true'] {
  color: var(--blue);
}
.round-btn[aria-pressed='true']::before {
  opacity: 1;
  background: var(--blue-soft);
}
.burger {
  display: none;
}
.burger i {
  position: absolute;
  top: calc(50% - 0.75px);
  left: 13px;
  right: 13px;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 460ms var(--ease-spring);
}
.burger i:nth-child(1) {
  transform: translateY(-3.5px);
}
.burger i:nth-child(2) {
  transform: translateY(3.5px);
}
.is-menu-open .burger i:nth-child(1) {
  transform: rotate(45deg);
}
.is-menu-open .burger i:nth-child(2) {
  transform: rotate(-45deg);
}
.menu-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  display: grid;
  align-content: center;
  padding: 104px 24px 48px;
  overflow-y: auto;
  background: var(--menu-bg);
  -webkit-backdrop-filter: blur(34px) saturate(1.3);
  backdrop-filter: blur(34px) saturate(1.3);
  opacity: 0;
  visibility: hidden;
  transition: opacity 360ms var(--ease-exit), visibility 0ms var(--ease-exit) 360ms;
}
.is-menu-open .menu-overlay {
  opacity: 1;
  visibility: visible;
  transition: opacity 520ms var(--ease-spring);
}
.menu-overlay ol {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px 40px;
  width: min(920px, 100%);
  margin: 0 auto;
  padding: 0;
  list-style: none;
}
.menu-overlay a {
  display: block;
  overflow: hidden;
  padding: 6px 0;
  text-decoration: none;
}
.menu-overlay a span {
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-size: clamp(24px, 3.6vw, 38px);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.01em;
  opacity: 0;
  transform: translateY(110%);
  transition: transform 320ms var(--ease-exit), opacity 200ms var(--ease-exit);
}
.menu-overlay a small {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--board-faint);
}
.is-menu-open .menu-overlay a span {
  opacity: 1;
  transform: none;
  transition: transform 800ms var(--ease-spring), opacity 500ms var(--ease-enter);
  transition-delay: calc(var(--i, 0) * 45ms + 80ms);
}

/* ---------------------------------------------------------------------
   Section scaffolding
   --------------------------------------------------------------------- */
main {
  position: relative;
  z-index: var(--z-main);
}
.wrap {
  width: min(1320px, calc(100% - 64px));
  margin-inline: auto;
}
.sec {
  position: relative;
  padding: clamp(112px, 11vw, 176px) 0;
}
.sec + .sec::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  width: min(1320px, calc(100% - 64px));
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--board-hair-strong) 20%, var(--board-hair-strong) 80%, transparent);
  transform: translateX(-50%);
}
.sec-head {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 28px 72px;
  align-items: end;
  margin-bottom: clamp(52px, 6vw, 92px);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: 26px;
  padding: 0 12px 0 10px;
  border-radius: 999px;
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--board-muted);
  white-space: nowrap;
  background: var(--bz-shell);
  box-shadow: inset 0 0 0 1px var(--board-hair-strong), inset 0 1px 0 var(--bz-hi);
}
.eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--moon-indigo), var(--moon-cyan));
  box-shadow: 0 0 10px var(--moon-cyan);
}
.eyebrow b {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--board-ink);
}
.h2 {
  margin-top: 20px;
  font-size: clamp(40px, 5.4vw, 80px);
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: -0.02em;
  text-wrap: balance;
  word-break: keep-all;
}
.h2 .en {
  display: block;
  margin-top: 10px;
  font-size: 0.42em;
  font-weight: 400;
  letter-spacing: -0.03em;
  color: var(--board-faint);
}
.grad {
  color: transparent;
  background: linear-gradient(100deg, var(--moon-indigo) 10%, #7fb6f0 55%, var(--moon-cyan));
  -webkit-background-clip: text;
  background-clip: text;
}
[data-theme='dark'] .grad {
  background: linear-gradient(100deg, #9fb4ff 10%, #b5d8ff 55%, var(--moon-cyan));
  -webkit-background-clip: text;
  background-clip: text;
}
.lede {
  max-width: 540px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--board-muted);
  text-wrap: pretty;
}
.lede + .lede {
  margin-top: 12px;
}
.sub-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  margin: 96px 0 28px;
}
.sub-head:first-child {
  margin-top: 0;
}
.sub-head h3 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.sub-head .mono {
  font-size: 12px;
  color: var(--board-faint);
}
.sub-head p {
  flex-basis: 100%;
  max-width: 720px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--board-muted);
}

/* ---------------------------------------------------------------------
   Double-bezel board containers
   --------------------------------------------------------------------- */
.bz {
  padding: 6px;
  border-radius: 30px;
  background: var(--bz-shell);
  box-shadow: inset 0 0 0 1px var(--bz-ring), inset 0 1px 0 var(--bz-hi), var(--bz-shadow);
}
.bz-core {
  position: relative;
  height: 100%;
  overflow: hidden;
  padding: 28px;
  border-radius: 24px;
  background: var(--bz-core);
  box-shadow: 0 0 0 1px var(--bz-core-ring), inset 0 1px 0 var(--bz-hi);
}
.bz-core.is-flush {
  padding: 0;
}
.bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 20px;
}
.bento > * {
  grid-column: span var(--span, 4);
  grid-row: span var(--rows, 1);
}
.card-kicker {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--board-faint);
}
.card-kicker .mono {
  letter-spacing: 0.04em;
}
.card-title {
  margin-top: 16px;
  font-size: 22px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
}
.card-text {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--board-muted);
  text-wrap: pretty;
}

/* ---------------------------------------------------------------------
   00 Cover
   --------------------------------------------------------------------- */
.cover {
  display: grid;
  align-items: center;
  min-height: 100dvh;
  padding: 150px 0 110px;
  overflow-x: clip;
}
.cover-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
  gap: 40px 56px;
  align-items: center;
}
.cover h1 {
  margin-top: 26px;
  font-size: clamp(64px, 8.8vw, 140px);
  font-weight: 600;
  line-height: 0.92;
  letter-spacing: -0.055em;
}
.cover h1 span {
  display: block;
}
.cover-zh {
  margin-top: 26px;
  font-size: clamp(24px, 2.4vw, 34px);
  font-weight: 500;
  letter-spacing: 0.02em;
  word-break: keep-all;
}
.cover .lede {
  margin-top: 18px;
}
.cover-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
}
.cover-cta .btn {
  height: 48px;
  padding: 0 22px;
  font-size: 14px;
}
.cover-cta .btn-primary {
  padding-right: 6px;
}
.cover-cta .btn-orb {
  width: 36px;
  height: 36px;
}
.cover-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  max-width: 600px;
  margin-top: 52px;
  padding-top: 22px;
  box-shadow: inset 0 1px 0 var(--board-hair-strong);
}
.cover-stats b {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.04em;
}
.cover-stats span {
  font-size: 12.5px;
  color: var(--board-muted);
}
.cascade {
  position: relative;
  height: 640px;
}
.cover-moon {
  position: absolute;
  top: 50%;
  left: 54%;
  width: 560px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 38% 38%, rgb(255 255 255 / 95%), rgb(214 226 255 / 70%) 38%, rgb(142 162 240 / 30%) 66%, transparent 71%);
  box-shadow: 0 0 140px rgb(143 227 238 / 26%);
  -webkit-mask: radial-gradient(circle at 74% 30%, transparent 33%, #000 33.6%);
  mask: radial-gradient(circle at 74% 30%, transparent 33%, #000 33.6%);
  transform: translate(-50%, -50%);
  opacity: 0.85;
}
[data-theme='dark'] .cover-moon {
  background: radial-gradient(circle at 38% 38%, rgb(232 240 255 / 55%), rgb(143 170 255 / 30%) 40%, rgb(110 134 232 / 14%) 64%, transparent 71%);
  box-shadow: 0 0 180px rgb(110 134 232 / 30%);
  opacity: 1;
}
.cover-orbit {
  position: absolute;
  top: 50%;
  left: 54%;
  width: 700px;
  aspect-ratio: 1;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px var(--board-hair-strong);
  transform: translate(-50%, -50%) rotate(-18deg) scaleY(0.42);
}
.cascade-item {
  position: absolute;
  transform: rotate(var(--r, 0deg));
}
.cascade-item > * {
  animation: float var(--float, 9s) var(--ease-orbit) infinite alternate;
}
.cascade-item.c1 {
  --r: -5deg;
  --float: 10s;
  top: 10px;
  left: 0;
}
.cascade-item.c2 {
  --r: 3.5deg;
  --float: 8s;
  top: 210px;
  left: 24%;
}
.cascade-item.c3 {
  --r: -2deg;
  --float: 11s;
  top: 480px;
  left: 6%;
}
.cascade-item.c1 .dlg {
  opacity: 0.94;
}
@keyframes float {
  from {
    transform: translate3d(0, -7px, 0);
  }
  to {
    transform: translate3d(0, 9px, 0);
  }
}
.scroll-cue {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 64px;
  font-size: 12px;
  color: var(--board-faint);
}
.scroll-cue i {
  position: relative;
  width: 1px;
  height: 36px;
  overflow: hidden;
  background: var(--board-hair-strong);
}
.scroll-cue i::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent, var(--moon-indigo));
  transform: translateY(-100%);
  animation: cue 2200ms var(--ease-spring) infinite;
}
@keyframes cue {
  to {
    transform: translateY(100%);
  }
}

/* ---------------------------------------------------------------------
   01 Principles
   --------------------------------------------------------------------- */
.pr-visual {
  display: grid;
  gap: 10px;
  margin-top: 28px;
}
.pr-big .bz-core {
  display: grid;
  grid-template-rows: auto 1fr;
  padding: 36px;
}
.pr-big .card-title {
  font-size: clamp(26px, 2.6vw, 36px);
}
.pr-big .pr-demo {
  display: grid;
  align-content: end;
  gap: 16px;
  margin-top: 36px;
}
.demo-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.demo-arrow {
  color: var(--board-faint);
}
.demo-arrow .ic {
  width: 16px;
  height: 16px;
}
.demo-old {
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 12px;
  border-radius: 8px;
  font-size: 13px;
  color: var(--text-muted);
  background: var(--surface);
  box-shadow: inset 0 0 0 1px var(--line);
  text-decoration: line-through;
  text-decoration-color: color-mix(in srgb, var(--red) 60%, transparent);
}
.lvl-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}
.lvl-chip {
  display: grid;
  gap: 2px;
  padding: 10px 12px;
  border-radius: 12px;
  font-size: 12px;
  color: var(--text-muted);
  background: var(--tone-soft);
  box-shadow: inset 0 0 0 1px var(--tone-line);
}
.lvl-chip b {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--tone-fg);
}
.lvl-chip strong {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}
.mini-foot {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 10px 10px 14px;
  border-radius: 14px;
  background: var(--dlg-foot-bg);
  box-shadow: inset 0 0 0 1px var(--board-hair);
}
.mini-foot .dlg-actions {
  gap: 6px;
}
.depth-demo {
  position: relative;
  height: 132px;
}
.depth-demo > div {
  position: absolute;
  inset: 16px 40px 0;
  border-radius: 18px;
  background: var(--dlg-shell-bg);
  box-shadow: inset 0 0 0 1px var(--dlg-shell-ring), var(--dlg-shadow);
}
.depth-demo > div::after {
  content: '';
  position: absolute;
  inset: 5px;
  border-radius: 13px;
  background: var(--dlg-core-bg);
  box-shadow: 0 0 0 1px var(--dlg-core-ring);
}
.depth-demo::before {
  content: '';
  position: absolute;
  inset: -20px 0 -30px;
  background: radial-gradient(50% 60% at 50% 50%, var(--dlg-halo-a), transparent 72%);
}
.rhythm {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 64px;
}
.rhythm i {
  flex: 1;
  height: calc(var(--h) * 4px);
  border-radius: 6px 6px 3px 3px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--moon-indigo) 55%, transparent), color-mix(in srgb, var(--moon-cyan) 35%, transparent));
}

/* ---------------------------------------------------------------------
   02 Tokens
   --------------------------------------------------------------------- */
.swatch-table {
  display: grid;
  gap: 6px;
  margin-top: 22px;
}
.swatch-head,
.swatch-row {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) repeat(2, minmax(0, 1fr));
  gap: 8px;
  align-items: center;
}
.swatch-head {
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--board-faint);
}
.swatch-row > span:first-child {
  display: grid;
  font-size: 13px;
}
.swatch-row > span:first-child small {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--board-faint);
}
.swatch {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  height: 46px;
  padding: 7px 9px;
  border-radius: 12px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  box-shadow: inset 0 0 0 1px rgb(20 30 60 / 8%);
}
.swatch.on-dark {
  color: rgb(255 255 255 / 86%);
}
.swatch.on-light {
  color: rgb(17 28 54 / 78%);
}
.elev-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}
.elev {
  position: relative;
  display: grid;
  place-items: center;
  height: 118px;
  border-radius: 16px;
  background: var(--sk-main);
  box-shadow: inset 0 0 0 1px var(--board-hair);
  overflow: hidden;
}
.elev > div {
  display: grid;
  place-items: center;
  width: 70%;
  height: 56%;
  border-radius: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  background: var(--dlg-core-bg);
}
.elev[data-e='0'] > div {
  background: var(--field-bg);
  box-shadow: inset 0 0 0 1px var(--field-ring);
}
.elev[data-e='1'] > div {
  box-shadow: 0 0 0 1px var(--dlg-core-ring), var(--pop-shadow);
}
.elev[data-e='2'] > div {
  box-shadow: 0 0 0 5px var(--dlg-shell-bg), 0 0 0 6px var(--dlg-shell-ring), var(--dlg-shadow);
}
.elev[data-e='3']::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(60% 70% at 50% 50%, var(--dlg-halo-a), transparent 70%), var(--dlg-scrim);
}
.elev[data-e='3'] > div {
  position: relative;
  box-shadow: 0 0 0 5px var(--dlg-shell-bg), 0 0 0 6px var(--dlg-shell-ring), var(--dlg-shadow);
}
.elev figcaption {
  position: absolute;
  top: 9px;
  left: 11px;
  font-size: 11px;
  font-weight: 500;
  color: var(--board-muted);
}
.radii {
  position: relative;
  display: grid;
  place-items: center;
  height: 250px;
  margin-top: 18px;
}
.radii > div {
  position: relative;
  display: grid;
  place-items: center;
  padding: 16px;
  border-radius: 34px;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--moon-indigo) 55%, transparent);
  background: color-mix(in srgb, var(--moon-indigo) 5%, transparent);
}
.radii > div > div {
  padding: 16px;
  border-radius: 18px;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--moon-cyan) 70%, transparent);
  background: color-mix(in srgb, var(--moon-cyan) 7%, transparent);
}
.radii > div > div > div {
  width: 150px;
  height: 64px;
  border-radius: 10px;
  background: var(--dlg-core-bg);
  box-shadow: 0 0 0 1px var(--hair-strong);
}
.radii-label {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--board-muted);
  white-space: nowrap;
}
.radii-formula {
  margin-top: 8px;
  padding: 10px 12px;
  border-radius: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--board-muted);
  background: var(--sk-main);
  box-shadow: inset 0 0 0 1px var(--board-hair);
}
.type-rows {
  display: grid;
  margin-top: 18px;
}
.type-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: baseline;
  padding: 14px 0;
}
.type-row + .type-row {
  box-shadow: inset 0 1px 0 var(--board-hair);
}
.type-row .spec {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--board-faint);
  white-space: nowrap;
}
.curves {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 20px;
}
.curve {
  display: grid;
  gap: 8px;
  padding: 12px;
  border-radius: 16px;
  background: var(--sk-main);
  box-shadow: inset 0 0 0 1px var(--board-hair);
}
.curve svg {
  width: 100%;
  height: auto;
  overflow: visible;
}
.curve .grid-line {
  stroke: var(--board-hair-strong);
  stroke-width: 1;
  fill: none;
}
.curve .path {
  fill: none;
  stroke: url(#g-moon);
  stroke-width: 2.5;
  stroke-linecap: round;
}
.curve .handle {
  stroke: var(--board-faint);
  stroke-width: 1;
  stroke-dasharray: 2 3;
  fill: none;
}
.curve .dot {
  fill: var(--bz-core);
  stroke: var(--moon-indigo);
  stroke-width: 1.5;
}
.curve strong {
  font-size: 13px;
  font-weight: 600;
}
.curve small {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  line-height: 1.5;
  color: var(--board-faint);
}
.sizes {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}
.size-row {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) 64px;
  gap: 12px;
  align-items: center;
  font-size: 12px;
}
.size-row b {
  font-family: var(--font-mono);
  font-weight: 500;
}
.size-row > i {
  display: block;
  height: 26px;
  border-radius: 8px;
  background: linear-gradient(90deg, color-mix(in srgb, var(--moon-indigo) 22%, transparent), color-mix(in srgb, var(--moon-cyan) 22%, transparent));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--moon-indigo) 30%, transparent);
}
.size-row span {
  font-size: 11.5px;
  color: var(--board-muted);
}
.size-row em {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-style: normal;
  text-align: right;
  color: var(--board-faint);
}

/* ---------------------------------------------------------------------
   03 Anatomy
   --------------------------------------------------------------------- */
.anat {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 20px;
  align-items: stretch;
}
.anat-stage {
  min-height: 640px;
}
.pin {
  position: absolute;
  top: var(--y, 0);
  left: var(--x, 0);
  z-index: 6;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-style: normal;
  font-weight: 500;
  line-height: 1;
  color: #ffffff;
  background: linear-gradient(180deg, #8298f2, #5b72d6);
  box-shadow: 0 0 0 3px rgb(110 134 232 / 24%), 0 4px 10px -2px rgb(50 70 170 / 50%);
  transform: translate(-50%, -50%);
  pointer-events: none;
  transition: opacity 240ms var(--ease-enter), transform 380ms var(--ease-spring);
}
.has-pin {
  position: relative;
}
.hide-pins .pin {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.6);
}
.redlines .dlg-head,
.redlines .dlg-body,
.redlines .dlg-foot {
  outline: 1px dashed rgb(236 72 120 / 60%);
  outline-offset: -1px;
}
.redlines .dlg-core {
  outline: 1px solid rgb(236 72 120 / 45%);
}
.measure {
  position: absolute;
  z-index: 7;
  display: none;
  padding: 1px 5px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.4;
  color: #ffffff;
  background: rgb(222 60 110 / 92%);
  pointer-events: none;
}
.redlines .measure {
  display: block;
}
.legend {
  display: grid;
  align-content: start;
  gap: 2px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}
.legend li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 12px;
  padding: 11px 0;
}
.legend li + li {
  box-shadow: inset 0 1px 0 var(--board-hair);
}
.legend li > b {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  color: var(--blue);
  background: var(--blue-soft);
  box-shadow: inset 0 0 0 1px var(--chip-ring);
}
.legend strong {
  display: block;
  font-size: 14px;
  font-weight: 600;
}
.legend span {
  display: block;
  margin-top: 2px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--board-muted);
}
.legend code {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--board-ink);
}
.toggle-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  font-size: 13px;
  color: var(--board-muted);
}
.toggle-row label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

/* ---------------------------------------------------------------------
   04 Classification: matrix + reversibility levels
   --------------------------------------------------------------------- */
.table-scroll {
  overflow-x: auto;
}
.matrix {
  width: 100%;
  min-width: 860px;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 13.5px;
  line-height: 1.6;
}
.matrix th,
.matrix td {
  padding: 16px 18px;
  text-align: left;
  vertical-align: top;
}
.matrix tbody tr + tr > * {
  box-shadow: inset 0 1px 0 var(--board-hair);
}
.matrix thead th {
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--board-faint);
  box-shadow: inset 0 -1px 0 var(--board-hair-strong);
}
.matrix tbody th {
  min-width: 170px;
  font-weight: 600;
}
.matrix tbody th small {
  display: block;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  color: var(--board-faint);
}
.matrix td {
  color: var(--board-muted);
}
.matrix td b {
  font-weight: 500;
  color: var(--board-ink);
}
.levels {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 20px;
}
.level .bz-core {
  padding: 26px;
}
.level .bz-core::before {
  content: '';
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--tone-fg), transparent);
  opacity: 0.8;
}
.level-no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--tone-fg);
}
.level h4 {
  margin-top: 10px;
  font-size: 20px;
  font-weight: 600;
}
.level p {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--board-muted);
}
.level ul {
  display: grid;
  gap: 6px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
}
.level li {
  display: flex;
  gap: 8px;
}
.level li::before {
  content: '';
  flex: none;
  width: 5px;
  height: 5px;
  margin-top: 8px;
  border-radius: 50%;
  background: var(--tone-fg);
}
.level .rule {
  margin-top: 18px;
  padding: 11px 12px;
  border-radius: 12px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text);
  background: var(--tone-soft);
  box-shadow: inset 0 0 0 1px var(--tone-line);
}

/* ---------------------------------------------------------------------
   Artboards
   --------------------------------------------------------------------- */
.ab-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  align-items: start;
}
.ab {
  min-width: 0;
  padding: 6px;
  border-radius: 30px;
  background: var(--bz-shell);
  box-shadow: inset 0 0 0 1px var(--bz-ring), inset 0 1px 0 var(--bz-hi), var(--bz-shadow);
}
.ab.is-wide {
  grid-column: 1 / -1;
}
.ab-core {
  overflow: hidden;
  border-radius: 24px;
  background: var(--bz-core);
  box-shadow: 0 0 0 1px var(--bz-core-ring), inset 0 1px 0 var(--bz-hi);
}
.ab-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
  padding: 14px 14px 14px 18px;
}
.ab-id {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.ab-no {
  display: grid;
  flex: none;
  place-items: center;
  min-width: 46px;
  height: 28px;
  padding: 0 9px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--board-muted);
  box-shadow: inset 0 0 0 1px var(--board-hair-strong);
}
.ab-title {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.005em;
}
.ab-meta {
  display: flex;
  flex-wrap: wrap;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  color: var(--board-faint);
}
.ab-meta span + span::before {
  content: '·';
  margin: 0 6px;
  opacity: 0.7;
}
.ab-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}
.ab-states {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  padding: 3px;
  border-radius: 999px;
  background: var(--seg-bg);
  box-shadow: inset 0 0 0 1px var(--board-hair);
}
.ab-states button {
  position: relative;
  isolation: isolate;
  height: 26px;
  padding: 0 11px;
  border: 0;
  border-radius: 999px;
  font-size: 12px;
  color: var(--board-muted);
  white-space: nowrap;
  background: transparent;
  cursor: pointer;
  transition: color var(--t-hover) var(--ease-enter), transform var(--t-press) var(--ease-enter);
}
.ab-states button::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  background: var(--seg-thumb);
  box-shadow: 0 1px 2px rgb(20 30 60 / 10%), inset 0 0 0 1px var(--hair);
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 180ms var(--ease-enter), transform 320ms var(--ease-spring);
}
.ab-states button:hover {
  color: var(--board-ink);
}
.ab-states button:active {
  transform: scale(0.96);
}
.ab-states button[aria-pressed='true'] {
  color: var(--board-ink);
  font-weight: 500;
}
.ab-states button[aria-pressed='true']::before {
  opacity: 1;
  transform: none;
}
.btn-ghost.has-orb {
  padding-right: 3px;
}
.btn-ghost .btn-orb {
  color: var(--blue);
  background: var(--blue-soft);
  box-shadow: inset 0 0 0 1px var(--chip-ring);
}
.stage {
  position: relative;
  isolation: isolate;
  display: grid;
  place-items: center;
  min-height: var(--stage-h, 540px);
  margin: 0 6px;
  padding: 56px 28px;
  overflow: hidden;
  border-radius: 18px;
  background: var(--sk-main);
  box-shadow: inset 0 0 0 1px var(--board-hair);
}
.stage::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  background: radial-gradient(56% 52% at 50% 48%, var(--dlg-halo-a), var(--dlg-halo-b) 48%, transparent 74%), var(--dlg-scrim);
  pointer-events: none;
}
.stage.is-bare::before {
  display: none;
}
.stage > :not(.sk) {
  position: relative;
  z-index: 2;
}
.stage.is-top {
  place-items: start center;
}
.stage-caption {
  position: absolute !important;
  bottom: 12px;
  left: 16px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--board-faint);
}
.ab-notes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px 28px;
  margin: 0;
  padding: 18px 22px 22px;
  list-style: none;
}
.ab-notes li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 13px;
  line-height: 1.65;
  color: var(--board-muted);
}
.ab-notes b {
  font-weight: 500;
  color: var(--board-ink);
}
.tag {
  display: inline-flex;
  align-items: center;
  height: 21px;
  margin-top: 1px;
  padding: 0 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 500;
  color: var(--board-muted);
  white-space: nowrap;
  box-shadow: inset 0 0 0 1px var(--board-hair-strong);
}
.tag.is-opt {
  color: var(--purple);
  background: var(--purple-soft);
  box-shadow: inset 0 0 0 1px var(--purple-line);
}
.tag.is-a11y {
  color: var(--cyan);
  background: var(--cyan-soft);
  box-shadow: inset 0 0 0 1px var(--cyan-line);
}
.tag.is-risk {
  color: var(--red);
  background: var(--red-soft);
  box-shadow: inset 0 0 0 1px var(--red-line);
}

/* App skeleton (injected into each stage by board.js) */
.sk {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: grid;
  grid-template-columns: 21% minmax(0, 1fr) 25%;
  pointer-events: none;
}
.sk i {
  display: block;
  width: var(--w, 60%);
  height: 7px;
  border-radius: 999px;
  background: var(--sk-bar);
}
.sk-side {
  display: grid;
  align-content: start;
  gap: 14px;
  padding: 22px 18px;
  background: var(--sk-side);
  box-shadow: inset -1px 0 0 var(--board-hair);
}
.sk-side .sk-brand {
  width: 22px;
  height: 22px;
  margin-bottom: 10px;
  border-radius: 7px;
  background: var(--sk-accent);
}
.sk-side .is-on {
  height: 24px;
  width: 100%;
  border-radius: 8px;
  background: var(--sk-accent);
}
.sk-main {
  display: grid;
  grid-template-rows: 46px 1fr;
  min-width: 0;
}
.sk-top {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 18px;
  box-shadow: inset 0 -1px 0 var(--board-hair);
}
.sk-top i {
  width: var(--w, 60px);
  height: 18px;
  border-radius: 999px;
}
.sk-code {
  display: grid;
  align-content: start;
  gap: 9px;
  padding: 20px 22px;
}
.sk-code i.add {
  background: var(--sk-add);
}
.sk-code i.del {
  background: var(--sk-del);
}
.sk-panel {
  display: grid;
  grid-template-rows: 46px 1fr;
  background: var(--sk-panel);
  box-shadow: inset 1px 0 0 var(--board-hair);
}
.sk-rows {
  display: grid;
  align-content: start;
  gap: 16px;
  padding: 18px 16px;
}
.sk-rows span {
  display: flex;
  align-items: center;
  gap: 8px;
}
.sk-rows span::before {
  content: '';
  flex: none;
  width: 12px;
  height: 12px;
  border-radius: 4px;
  background: var(--sk-bar-strong);
}

/* Popover stages: trigger + floating layer */
.pop-stage {
  display: grid;
  justify-items: start;
  gap: 8px;
  width: min(100%, 420px);
}
.pop-stage.is-end {
  justify-items: end;
}
.pop-stage.is-center {
  justify-items: center;
}
.mock-trigger {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 12.5px;
  color: var(--text);
  white-space: nowrap;
  background: var(--surface);
  box-shadow: inset 0 0 0 1px var(--line), 0 0 0 4px var(--focus-soft);
}
.mock-trigger .ic {
  width: 15px;
  height: 15px;
  color: var(--text-muted);
}
.mock-trigger.is-danger {
  color: var(--red);
  box-shadow: inset 0 0 0 1px var(--red-line), 0 0 0 4px color-mix(in srgb, var(--red) 14%, transparent);
}
.mock-trigger.is-danger .ic {
  color: var(--red);
}
.mock-trigger.is-icon {
  width: 32px;
  padding: 0;
  justify-content: center;
}
.mock-status {
  display: flex;
  align-items: center;
  gap: 14px;
  height: 30px;
  padding: 0 6px 0 12px;
  border-radius: 999px;
  font-size: 11.5px;
  color: var(--text-muted);
  background: var(--surface);
  box-shadow: inset 0 0 0 1px var(--line);
}
.mock-status .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
}
.mock-status .bell {
  position: relative;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  color: var(--text);
  background: var(--blue-soft);
  box-shadow: 0 0 0 3px var(--focus-soft);
}
.mock-status .bell .ic {
  width: 14px;
  height: 14px;
}
.mock-status .bell::after {
  content: '';
  position: absolute;
  top: 2px;
  right: 2px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--moon-indigo);
  box-shadow: 0 0 0 2px var(--surface);
}
.pop.is-replay {
  animation: pop-in var(--t-pop) var(--ease-glide) both;
}
.pop-stage.is-up .pop.is-replay {
  animation-name: pop-in-up;
}
@keyframes pop-in {
  from {
    opacity: 0;
    transform: translateY(-4px) scale(0.96);
  }
}
@keyframes pop-in-up {
  from {
    opacity: 0;
    transform: translateY(4px) scale(0.96);
  }
}
.pop-stage .pop {
  transform-origin: top left;
}
.pop-stage.is-end .pop {
  transform-origin: top right;
}
.pop-stage.is-up .pop {
  transform-origin: bottom right;
}
.pop-stage.is-up.is-left .pop {
  transform-origin: bottom left;
}
.menus-pair {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: center;
  gap: 48px 64px;
  width: 100%;
}
.menus-pair .pop-stage {
  width: auto;
}
.pc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px;
  align-items: start;
}
.pc-card .stage {
  --stage-h: 380px;
  padding: 40px 20px;
}

/* ---------------------------------------------------------------------
   09 Feedback centre
   --------------------------------------------------------------------- */
.tray-dock {
  position: absolute !important;
  right: 18px;
  bottom: 18px;
}
.fb-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
}

/* ---------------------------------------------------------------------
   10 Motion lab
   --------------------------------------------------------------------- */
.mlab {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  gap: 20px;
}
.mlab-stage {
  position: relative;
  height: 600px;
  overflow: hidden;
  border-radius: 18px;
  background: var(--sk-main);
  box-shadow: inset 0 0 0 1px var(--board-hair);
}
.mn-layer.is-inline {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
}
.mn-layer.is-inline .mn-scrim {
  position: absolute;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}
.mlab-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.timeline {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}
.tl-row {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  font-size: 12px;
  color: var(--board-muted);
}
.tl-track {
  position: relative;
  height: 22px;
  border-radius: 7px;
  background: var(--sk-main);
  box-shadow: inset 0 0 0 1px var(--board-hair);
}
.tl-track i {
  position: absolute;
  top: 3px;
  bottom: 3px;
  left: var(--from);
  width: var(--len);
  border-radius: 5px;
  background: linear-gradient(90deg, color-mix(in srgb, var(--moon-indigo) 70%, transparent), color-mix(in srgb, var(--moon-cyan) 70%, transparent));
}
.tl-track i.is-exit {
  background: linear-gradient(90deg, color-mix(in srgb, var(--red) 50%, transparent), color-mix(in srgb, var(--orange) 45%, transparent));
}
.tl-track em {
  position: absolute;
  top: 50%;
  left: calc(var(--from) + var(--len) + 6px);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-style: normal;
  color: var(--board-faint);
  white-space: nowrap;
  transform: translateY(-50%);
}
.tl-scale {
  display: flex;
  justify-content: space-between;
  margin-left: 100px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--board-faint);
}
.motion-rules {
  display: grid;
  gap: 0;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}
.motion-rules li {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--board-muted);
}
.motion-rules li + li {
  box-shadow: inset 0 1px 0 var(--board-hair);
}
.motion-rules b {
  font-weight: 500;
  color: var(--board-ink);
}
.motion-rules code {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--board-ink);
}

/* ---------------------------------------------------------------------
   11 Responsive: phone frame
   --------------------------------------------------------------------- */
.phones {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 48px;
}
.phone-wrap {
  display: grid;
  flex: 0 1 375px;
  min-width: 0;
  gap: 16px;
}
.phone-wrap figcaption {
  font-size: 13px;
  color: var(--board-muted);
  text-align: center;
}
.phone {
  width: 100%;
  height: 760px;
  padding: 10px;
  border-radius: 54px;
  background: var(--bz-shell);
  box-shadow: inset 0 0 0 1px var(--bz-ring), inset 0 1px 0 var(--bz-hi), var(--bz-shadow);
}
.phone-core {
  position: relative;
  isolation: isolate;
  display: grid;
  align-content: end;
  height: 100%;
  overflow: hidden;
  border-radius: 44px;
  background: var(--sk-main);
  box-shadow: 0 0 0 1px var(--bz-core-ring);
}
.phone-core::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  background: radial-gradient(90% 50% at 50% 70%, var(--dlg-halo-a), transparent 70%), var(--dlg-scrim);
}
.phone-core > .dlg {
  position: relative;
  z-index: 2;
}
.phone-notch {
  position: absolute;
  top: 12px;
  left: 50%;
  z-index: 3;
  width: 110px;
  height: 30px;
  border-radius: 999px;
  background: #05070d;
  transform: translateX(-50%);
}
.phone .sk {
  grid-template-columns: 1fr;
}
.phone .sk-side,
.phone .sk-panel {
  display: none;
}
.phone .sk-main {
  padding-top: 44px;
}
.bp-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 56px;
}
.bp-list .bz-core {
  padding: 24px;
}
.bp-list b {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--blue);
}
.bp-list p {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--board-muted);
}

/* ---------------------------------------------------------------------
   12 Implementation map
   --------------------------------------------------------------------- */
.impl {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}
.impl .matrix {
  min-width: 920px;
  font-size: 13px;
}
.impl .matrix td,
.impl .matrix th {
  padding: 12px 16px;
}
.impl .matrix td code,
.impl .matrix th code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--board-ink);
}
.pill-tone {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--tone-fg);
}
.pill-tone::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--tone-fg);
}
.code-block {
  margin: 16px 0 0;
  padding: 18px 20px;
  overflow-x: auto;
  border-radius: 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--text);
  white-space: pre;
  background: var(--code-bg);
  box-shadow: inset 0 0 0 1px var(--board-hair);
}
.code-block .c {
  color: var(--board-faint);
}
.code-block .k {
  color: var(--purple);
}
.code-block .s {
  color: var(--green);
}
.code-block .p {
  color: var(--blue);
}
.steps {
  display: grid;
  gap: 0;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}
.steps li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
}
.steps li + li {
  box-shadow: inset 0 1px 0 var(--board-hair);
}
.steps li > b {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--blue);
  background: var(--blue-soft);
  box-shadow: inset 0 0 0 1px var(--chip-ring);
}
.steps strong {
  font-size: 15px;
  font-weight: 600;
}
.steps p {
  margin-top: 4px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--board-muted);
}
.checklist {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 28px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13.5px;
  color: var(--board-muted);
}
.checklist li {
  display: flex;
  gap: 10px;
}
.checklist .ic {
  width: 17px;
  height: 17px;
  margin-top: 2px;
  color: var(--green);
}

/* Footer */
.foot {
  position: relative;
  z-index: var(--z-main);
  padding: 72px 0 96px;
}
.foot .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 28px;
  font-size: 13px;
  color: var(--board-faint);
  box-shadow: inset 0 1px 0 var(--board-hair-strong);
}
.foot .brand {
  padding-left: 0;
}

/* ---------------------------------------------------------------------
   Scroll reveal (transform + opacity only)
   --------------------------------------------------------------------- */
.js .reveal {
  opacity: 0;
  transform: translate3d(0, 56px, 0) scale(0.985);
  transition: opacity 900ms var(--ease-enter), transform 1200ms var(--ease-spring);
  transition-delay: var(--d, 0ms);
}
.js .reveal.is-in {
  opacity: 1;
  transform: none;
}
.js .cover .reveal {
  transform: translate3d(0, 28px, 0);
}
[data-reduced-motion='true'] .reveal {
  transform: none !important;
  transition: opacity 200ms var(--ease-enter) !important;
}
[data-reduced-motion='true'] .bg i,
[data-reduced-motion='true'] .cascade-item > *,
[data-reduced-motion='true'] .scroll-cue i::after,
[data-reduced-motion='true'] .island {
  animation: none;
}
[data-reduced-motion='true'] {
  scroll-behavior: auto;
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .js .reveal {
    transform: none;
    transition: opacity 200ms var(--ease-enter);
  }
  .bg i,
  .cascade-item > *,
  .scroll-cue i::after {
    animation: none;
  }
}

/* ---------------------------------------------------------------------
   Responsive
   --------------------------------------------------------------------- */
@media (max-width: 1279px) {
  .island-links {
    display: none;
  }
  .burger {
    display: grid;
  }
  .ab-grid,
  .fb-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .cover-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .cascade {
    width: min(760px, 100%);
    margin: 0 auto;
  }
  .anat {
    grid-template-columns: minmax(0, 1fr);
  }
  .mlab {
    grid-template-columns: minmax(0, 1fr);
  }
  .bento > * {
    grid-column: span var(--span-md, var(--span, 6));
  }
}
@media (max-width: 1023px) {
  .sec-head {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
  }
  .levels,
  .bp-list {
    grid-template-columns: minmax(0, 1fr);
  }
  .bento > * {
    grid-column: span 12;
    grid-row: auto;
  }
}
@media (max-width: 767px) {
  .wrap {
    width: calc(100% - 32px);
  }
  .sec {
    padding: 96px 0;
  }
  .sub-head {
    margin-top: 72px;
  }
  .island {
    top: 12px;
  }
  .brand small {
    display: none;
  }
  .menu-overlay ol {
    grid-template-columns: minmax(0, 1fr);
  }
  .cover {
    padding: 120px 0 72px;
  }
  .cover-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 0;
  }
  .cascade {
    display: grid;
    gap: 20px;
    height: auto;
  }
  .cascade-item {
    position: relative;
    top: auto !important;
    left: auto !important;
    transform: none;
  }
  .cascade-item > * {
    animation: none;
  }
  .cover-moon,
  .cover-orbit {
    display: none;
  }
  .bento,
  .levels {
    gap: 16px;
  }
  .bz-core {
    padding: 22px;
  }
  .ab-grid,
  .pc-grid {
    gap: 20px;
  }
  .ab {
    border-radius: 24px;
  }
  .ab-core {
    border-radius: 18px;
  }
  .ab-tools {
    margin-left: 0;
  }
  .stage {
    --stage-h: 0px;
    padding: 28px 10px;
    border-radius: 14px;
  }
  .sk {
    grid-template-columns: 1fr;
  }
  .sk-side,
  .sk-panel {
    display: none;
  }
  .opt-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .dlg-hints {
    display: none;
  }
  .dlg-foot {
    flex-wrap: wrap;
    padding-left: 12px;
  }
  .dlg-actions {
    flex-wrap: wrap;
    justify-content: flex-end;
  }
  .curves {
    grid-template-columns: minmax(0, 1fr);
  }
  .checklist {
    grid-template-columns: minmax(0, 1fr);
  }
  .mlab-stage {
    height: 560px;
  }
  .ledger {
    grid-template-columns: minmax(0, 1fr);
  }
  .ledger > div + div {
    box-shadow: inset 0 1px 0 var(--hair);
  }
  .fld-row,
  .fld-row.is-even {
    grid-template-columns: minmax(0, 1fr);
  }
  .stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------------------------------------------------------------------
   Patches
   --------------------------------------------------------------------- */
figure {
  margin: 0;
}
.is-menu-open .island {
  z-index: calc(var(--z-menu) + 1);
}
.size-row > i {
  display: flex;
  align-items: center;
  padding: 0 10px;
  font-style: normal;
}
.size-row > i span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}