html:has(.about-page) {
  height: auto;
  overflow-x: clip;
  overflow-y: auto;
  scroll-padding-block-start: var(--about-nav-offset, 10rem);
}

.about-page {
  --surface-elevated: color-mix(in srgb, var(--panel) 92%, var(--bg));
  --border-subtle: color-mix(in srgb, var(--line) 88%, transparent);
  --ease-spring: cubic-bezier(0.22, 1, 0.36, 1);
  display: block;
  height: auto;
  overflow-x: clip;
  overflow-y: visible;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.9;
}

.about-page *,
.about-page *::before,
.about-page *::after {
  box-sizing: border-box;
}

.about-page main,
.about-nav {
  width: min(1180px, calc(100% - 1.75rem));
  margin-inline: auto;
}

@media (min-width: 640px) {
  .about-page main,
  .about-nav {
    width: min(1180px, calc(100% - 2.5rem));
  }
}

.about-page a {
  color: inherit;
}

.about-skip {
  position: absolute;
  top: -120px;
  right: 1rem;
  padding: 0.6rem 1rem;
  border-radius: 0.75rem;
  border: 1px solid var(--lapis);
  color: var(--ink);
  text-decoration: none;
}

.about-skip:focus {
  top: 1rem;
  z-index: 60;
  background: var(--panel);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--lapis);
  z-index: 50;
  transform: scaleX(0);
  transform-origin: right;
  pointer-events: none;
}

/* Navigation */
.about-nav {
  position: sticky;
  top: 0.65rem;
  z-index: 35;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  padding: 0.65rem 0.9rem;
  margin-top: 0.65rem;
  background: var(--panel);
  border: 1px solid var(--border-subtle);
  border-radius: 1.25rem;
  flex-wrap: wrap;
}

.about-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 800;
  text-decoration: none;
  min-width: 0;
}

.brand-logo {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  border-radius: 9px;
}

.brand-title {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  font-size: 0.98rem;
}

.brand-title small {
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.about-nav nav {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.15rem;
  order: 3;
  flex-basis: 100%;
  padding-top: 0.35rem;
  border-top: 1px solid var(--border-subtle);
}

.about-nav nav a {
  display: grid;
  place-items: center;
  grid-column: span 2;
  min-height: 44px;
  text-decoration: none;
  text-align: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  padding: 0.25rem 0;
  border-radius: 0.45rem;
  white-space: nowrap;
}

.about-nav nav a:nth-last-child(-n+2) {
  grid-column: span 3;
}

@media (min-width: 360px) {
  .about-nav nav {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .about-nav nav a,
  .about-nav nav a:nth-last-child(-n+2) {
    grid-column: auto;
  }
}

.about-nav-controls {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-shrink: 0;
}

.nav-cta-btn {
  font-size: 0.78rem;
  padding: 0.45rem 0.85rem;
  border-radius: 0.65rem;
  min-height: 40px;
}

@media (max-width: 350px) {
  .nav-cta-btn {
    display: none;
  }
}

@media (min-width: 820px) {
  .about-nav {
    padding: 0.7rem 1.2rem;
    flex-wrap: nowrap;
  }
  .about-nav nav {
    display: flex;
    order: 0;
    flex-basis: auto;
    justify-content: center;
    padding-top: 0;
    border-top: 0;
    gap: 0.35rem;
  }
  .about-nav nav a {
    font-size: 0.84rem;
    padding: 0.45rem 0.85rem;
  }
}

.theme-orbit {
  width: 42px;
  height: 42px;
  min-height: 42px;
  padding: 9px;
  border-radius: 50%;
  flex-shrink: 0;
  display: inline-grid;
  place-items: center;
  background: var(--surface-elevated);
  border: 1px solid var(--border-subtle);
}

.theme-orbit svg {
  width: 20px;
  height: 20px;
  display: block;
}

.theme-sun {
  display: none !important;
}

[data-theme="dark"] .theme-sun {
  display: block !important;
  color: var(--ochre);
}

[data-theme="dark"] .theme-moon {
  display: none;
}

html[data-motion="full"] .theme-orbit svg {
  transition: transform 550ms var(--ease-spring) !important;
}

/* Shared Interactive Polish */
.about-page .btn {
  min-height: 44px;
  white-space: normal;
  transition: transform 150ms ease-out;
}

.about-page .btn.primary {
  background: var(--lapis);
  color: var(--panel);
  border: 1px solid var(--lapis);
  box-shadow: none;
}

.about-page .btn.primary:hover {
  background: var(--lapis-deep);
  border-color: var(--lapis-deep);
  box-shadow: none;
}

.about-page .btn.outline {
  background: var(--surface-elevated);
  color: var(--ink);
  border: 1px solid var(--border-subtle);
}

.about-page .theme-orbit {
  padding: 9px;
  border-radius: 50%;
}

.about-page button:active,
.about-page .btn:active {
  transform: scale(0.97);
}

.about-page :focus-visible {
  outline: 2.5px solid var(--lapis);
  outline-offset: 4px;
}

@media (hover: hover) and (pointer: fine) {
  .about-nav nav a:hover {
    color: var(--ink);
    background: var(--lapis-soft);
  }
  .theme-orbit:hover svg {
    transform: rotate(32deg) scale(1.06);
  }
  .about-page .btn:hover {
    transform: translateY(-1px);
  }
}

/* Hero & Live Showcase */
.about-hero {
  position: relative;
  display: grid;
  gap: 2rem;
  padding-block: 2.2rem 3rem;
}

.about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--lapis);
  font-weight: 700;
  letter-spacing: 0.01em;
  margin: 0 0 0.65rem;
  width: fit-content;
  max-width: 100%;
}

.signal-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--turquoise);
  flex-shrink: 0;
}

.about-page h1 {
  font-size: clamp(2rem, 5.4vw, 4.3rem);
  line-height: 1.32;
  letter-spacing: -0.03em;
  margin: 0.35rem 0 1.15rem;
  font-weight: 850;
}

.hero-line {
  display: block;
}

.about-page h1 .hero-line:first-child {
  color: var(--ink);
}

.about-page h1 em {
  font-style: normal;
  color: var(--lapis);
}

.about-lead {
  max-width: 38rem;
  color: var(--muted);
  font-size: clamp(0.95rem, 1.5vw, 1.08rem);
  line-height: 1.95;
  margin: 0;
}

.about-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-block: 1.6rem 1.4rem;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.75rem 1.35rem;
  border-radius: 0.95rem;
  font-weight: 700;
}

.hero-cta svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.hero-lab-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1.2rem;
  border-radius: 0.95rem;
  text-decoration: none;
  font-weight: 600;
}

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1rem;
}

.hero-pills span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.74rem;
  color: var(--muted);
  min-width: 0;
}

.hero-pills svg {
  width: 15px;
  height: 15px;
  color: var(--turquoise);
  flex-shrink: 0;
}

/* Interactive Showcase Card */
.hero-note {
  align-self: center;
  width: 100%;
  min-width: 0;
}

.about-use {
  padding-block: 0;
}

.showcase-card {
  background: var(--panel);
  border: 1px solid var(--border-subtle);
  border-radius: 1.5rem;
  padding: 1rem;
  display: grid;
  gap: 0.9rem;
  min-width: 0;
}

.showcase-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
}

.showcase-caption {
  font-size: 0.72rem;
  color: var(--muted);
  font-weight: 600;
}

.showcase-file {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  direction: ltr;
  background: var(--lapis-soft);
  color: var(--lapis);
  padding: 0.2rem 0.55rem;
  border-radius: 0.5rem;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
}

.showcase-file svg {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
}

.use-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.4rem;
  background: var(--bg);
  padding: 0.3rem;
  border-radius: 0.9rem;
  border: 1px solid var(--border-subtle);
}

@media (min-width: 420px) {
  .use-options {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.use-options button {
  background: transparent;
  color: var(--muted);
  border: 0;
  border-radius: 0.65rem;
  padding: 0.45rem 0.5rem;
  font: inherit;
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 38px;
  transition: transform 150ms ease-out;
}

.use-options button[aria-pressed="true"] {
  background: var(--lapis);
  color: var(--panel);
}

.showcase-chat {
  display: grid;
  gap: 0.7rem;
}

.chat-bubble-user {
  background: color-mix(in srgb, var(--lapis-soft) 70%, var(--bg));
  border: 1px solid color-mix(in srgb, var(--lapis) 20%, transparent);
  border-radius: 1rem 1rem 0.3rem 1rem;
  padding: 0.75rem 0.95rem;
}

.bubble-tag {
  display: block;
  font-size: 0.66rem;
  color: var(--lapis);
  font-weight: 700;
  margin-bottom: 0.15rem;
}

#use-question {
  font-size: 0.92rem;
  font-weight: 700;
  margin: 0;
  min-height: 0;
  padding: 0;
  color: var(--ink);
}

.chat-bubble-agent {
  background: var(--bg);
  border: 1px solid var(--border-subtle);
  border-radius: 1rem 1rem 1rem 0.3rem;
  padding: 0.85rem 0.95rem;
  display: grid;
  gap: 0.7rem;
}

.agent-reply-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.agent-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--muted);
}

.agent-metric {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--turquoise);
  background: var(--turquoise-soft);
  padding: 0.18rem 0.55rem;
  border-radius: 99px;
}

.agent-summary {
  margin: 0;
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.75;
}

.showcase-bars {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-template-rows: minmax(0, 1fr);
  gap: 0.5rem;
  align-items: end;
  height: 74px;
  padding: 0.5rem 0.6rem 0.35rem;
  background: var(--panel);
  border-radius: 0.75rem;
  border: 1px solid var(--border-subtle);
}

.s-bar {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  justify-items: center;
  align-self: stretch;
  gap: 0.25rem;
}

.s-bar i {
  display: block;
  align-self: end;
  width: 100%;
  max-width: 34px;
  height: var(--h, 50%);
  border-radius: 5px 5px 2px 2px;
  background: color-mix(in srgb, var(--lapis) 55%, var(--panel));
  transition: height 360ms var(--ease-spring), background-color 240ms ease;
}

.s-bar.is-peak i {
  background: var(--lapis);
}

.s-bar span {
  font-size: 0.62rem;
  color: var(--muted);
  white-space: nowrap;
}

.showcase-exports {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  padding-block-start: 0.45rem;
  border-block-start: 1px solid var(--border-subtle);
}

.showcase-exports span {
  display: grid;
  justify-items: center;
  align-content: start;
  gap: 0.25rem;
  font-size: 0.68rem;
  color: var(--muted);
  line-height: 1.5;
  text-align: center;
  padding: 0.25rem 0.15rem;
}

.showcase-exports span + span {
  border-inline-start: 1px solid var(--border-subtle);
}

.showcase-exports svg {
  width: 16px;
  height: 16px;
  color: var(--lapis);
}

@media (min-width: 480px) {
  .showcase-exports span {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
  }
}

.hero-footnote {
  display: block;
  margin-top: 0.55rem;
  font-size: 0.72rem;
  color: var(--muted);
  text-align: end;
}

@media (min-width: 920px) {
  .about-hero {
    grid-template-columns: 1.15fr 1fr;
    align-items: center;
    gap: 2.5rem;
  }
}

/* Data Laboratory */
.data-stage {
  grid-column: 1 / -1;
  min-width: 0;
  background: var(--panel);
  border: 1px solid var(--border-subtle);
  border-radius: 1.8rem;
  overflow: clip;
  position: relative;
  isolation: isolate;
  margin-top: 0.75rem;
}

.lab-top {
  padding: 1.25rem clamp(0.75rem, 4vw, 1.35rem) 1rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

.lab-top h2 {
  font-size: clamp(1.45rem, 3vw, 2.2rem) !important;
  margin: 0 !important;
  line-height: 1.35 !important;
}

.lab-modes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.25rem;
  background: var(--bg);
  padding: 0.3rem;
  border-radius: 0.95rem;
  border: 1px solid var(--border-subtle);
  width: 100%;
}

.lab-modes button {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  border: 0;
  border-radius: 0.7rem;
  color: var(--muted);
  background: transparent;
  padding: 0.35rem 0.15rem;
  min-height: 48px;
  min-width: 0;
  font: inherit;
  font-size: 0.76rem;
  font-weight: 700;
  line-height: 1.4;
  cursor: pointer;
  transition: transform 150ms ease-out;
}

@media (min-width: 480px) {
  .lab-modes {
    width: auto;
  }

  .lab-modes button {
    flex-direction: row;
    gap: 0.4rem;
    padding-inline: 0.85rem;
  }
}

.lab-modes svg {
  width: 17px;
  height: 17px;
  fill: currentColor;
  flex-shrink: 0;
}

.lab-modes button[aria-pressed="true"] {
  background: var(--lapis);
  color: var(--panel);
}

.lab-workspace {
  display: grid;
  min-width: 0;
}

.lab-viewport {
  position: relative;
  min-width: 0;
  min-height: 250px;
  display: grid;
  align-items: center;
  overflow: hidden;
}

#lab-field {
  width: 100%;
  height: auto;
  min-height: 240px;
  display: block;
  overflow: visible;
  color: var(--lapis);
  cursor: crosshair;
  position: relative;
  z-index: 1;
  touch-action: pan-y;
}

#lab-field[data-mode="cloud"] {
  cursor: grab;
  user-select: none;
}

#lab-field[data-grabbing="true"] {
  cursor: grabbing;
}

#lab-guides {
  fill: none;
  stroke: currentColor;
  stroke-width: 1;
  opacity: 0.22;
  stroke-dasharray: 4 8;
}

#lab-area {
  fill: var(--lapis);
  fill-opacity: 0.14;
  opacity: 0;
  transition: opacity 260ms ease;
}

#lab-field[data-mode="wave"] #lab-area {
  fill: var(--lapis);
  fill-opacity: 0.14;
  opacity: 1;
}

#lab-trace {
  stroke: var(--turquoise);
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0;
  transition: opacity 260ms ease;
}

#lab-mesh {
  stroke: var(--lapis);
  stroke-width: 0.85;
  opacity: 0.22;
}

#lab-points circle {
  fill: var(--lapis);
  stroke: var(--panel);
  stroke-width: 1.5;
  transition: stroke-width 150ms ease;
}

#lab-points circle[data-band="high"] {
  fill: var(--turquoise);
}

#lab-points circle[data-band="low"] {
  fill: color-mix(in srgb, var(--lapis) 65%, var(--muted));
}

#lab-points circle[data-selected="true"] {
  fill: var(--ochre);
  stroke: var(--ink);
  stroke-width: 2.8;
}

#lab-selection {
  stroke: var(--ochre);
  stroke-width: 1.5;
  stroke-dasharray: 4 3;
}

.lab-readout {
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  background: var(--panel);
  border: 1px solid var(--border-subtle);
  border-radius: 1rem;
  padding: 0.6rem 0.9rem;
  display: grid;
  gap: 0.15rem;
  z-index: 2;
  pointer-events: none;
  min-width: 132px;
}

.readout-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.lab-readout span {
  color: var(--muted);
  font-size: 0.66rem;
}

.readout-tag {
  font-size: 0.62rem !important;
  font-weight: 700;
  color: var(--turquoise) !important;
  background: var(--turquoise-soft);
  padding: 0.1rem 0.45rem;
  border-radius: 99px;
}

.lab-readout strong {
  font-size: 1.55rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--lapis);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 859px) {
  .lab-readout {
    position: static;
    margin: 0 clamp(0.75rem, 4vw, 1.35rem) 0.9rem;
    padding: 0.55rem 0.75rem;
    grid-template-columns: minmax(0, 1fr) auto;
    column-gap: 0.65rem;
    align-items: center;
  }

  .readout-head {
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  #sample-value {
    grid-area: 1 / 2 / 3 / 3;
  }
}

/* Lab Control Dock */
.lab-dock {
  display: grid;
  gap: 1rem;
  padding: 1.1rem 1.35rem;
  background: color-mix(in srgb, var(--bg) 70%, var(--panel));
  border-top: 1px solid var(--border-subtle);
  align-items: center;
}

.dock-slider-group {
  display: grid;
  gap: 0.35rem;
  min-width: 0;
}

.noise-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 700;
}

.noise-label output {
  color: var(--lapis);
  background: var(--lapis-soft);
  padding: 0.1rem 0.55rem;
  border-radius: 99px;
  font-variant-numeric: tabular-nums;
}

#data-energy {
  width: 100%;
  min-height: 36px;
  accent-color: var(--lapis);
  cursor: ew-resize;
}

.dock-metrics {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.dock-stat {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.dock-stat span {
  font-size: 0.68rem;
  color: var(--muted);
}

.dock-stat strong {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.dock-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.sample-controls {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.sample-controls button {
  width: 40px;
  height: 40px;
  min-height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-subtle);
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  font-size: 1rem;
  display: inline-grid;
  place-items: center;
}

#lab-motion {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--panel);
  color: var(--ink);
  border: 1px solid var(--border-subtle);
  border-radius: 99px;
  min-height: 40px;
  padding: 0.45rem 0.85rem;
  font: inherit;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
}

#lab-motion svg {
  width: 15px;
  height: 15px;
  color: var(--lapis);
}

#lab-motion:disabled {
  opacity: 0.55;
  cursor: default;
}

#lab-motion .motion-play { display: none; }
#lab-motion[aria-pressed="false"] .motion-pause { display: none; }
#lab-motion[aria-pressed="false"] .motion-play { display: block; }

#lab-reset {
  min-height: 40px;
  padding: 0.45rem 0.9rem;
  font-size: 0.75rem;
  border-radius: 99px;
}

.lab-bottom {
  padding: 0.85rem 1.35rem;
  background: var(--lapis-soft);
  border-top: 1px solid var(--border-subtle);
}

.lab-bottom p {
  margin: 0;
  font-size: 0.82rem;
  color: var(--ink);
  font-weight: 500;
}

@media (min-width: 860px) {
  .lab-top {
    padding: 1.6rem 2rem 1.2rem;
  }
  .lab-viewport {
    min-height: 390px;
  }
  .lab-dock {
    grid-template-columns: minmax(180px, 1.2fr) auto auto;
    justify-content: space-between;
    padding: 1.1rem 2rem;
  }
  .lab-bottom {
    padding: 0.9rem 2rem;
  }
}

/* 3-Step Story Section */
.about-story {
  display: grid;
  gap: 2rem;
  padding-block: 3.5rem;
}

.story-header {
  max-width: 42rem;
}

.about-page h2 {
  font-size: clamp(1.65rem, 3.2vw, 2.65rem);
  line-height: 1.4;
  margin: 0.35rem 0 0.9rem;
  letter-spacing: -0.025em;
  font-weight: 800;
}

.story-header h2 span {
  color: var(--lapis);
}

.story-sub {
  color: var(--muted);
  font-size: 0.95rem;
  margin: 0;
}

.story-steps {
  display: grid;
  gap: 1.15rem;
}

@media (min-width: 820px) {
  .story-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .story-card + .story-card {
    border-inline-start: 1px solid var(--border-subtle);
  }
}

.story-card {
  border-block-start: 1px solid var(--border-subtle);
  padding: 1.15rem 0.95rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.story-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.story-step-badge {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--lapis);
}

.story-icon {
  width: 38px;
  height: 38px;
  border-radius: 0.75rem;
  background: var(--turquoise-soft);
  color: var(--turquoise);
  display: grid;
  place-items: center;
}

.story-icon svg {
  width: 20px;
  height: 20px;
}

.story-card h3 {
  font-size: 1.08rem;
  margin: 0.2rem 0 0;
}

.story-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.85;
  flex: 1;
}

.story-example {
  margin-top: 0.4rem;
  padding: 0.5rem 0.75rem;
  border-radius: 0.75rem;
  background: var(--bg);
  border: 1px dashed var(--border-subtle);
  font-size: 0.74rem;
  color: var(--ink);
}

.story-example code {
  font-family: var(--mono, monospace);
  color: var(--lapis);
}

/* Stack Game ("برج بی‌انتها") */
.about-game {
  display: grid;
  gap: 0;
  border: 1px solid var(--border-subtle);
  border-radius: 1.8rem;
  overflow: clip;
  background: var(--lapis-soft);
}

@media (min-width: 860px) {
  .about-game {
    grid-template-columns: 1.08fr 1fr;
  }
}

.stack-intro {
  padding: clamp(1rem, 3.5vw, 2.6rem);
  align-self: center;
  min-width: 0;
}

.stack-intro h2 {
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  line-height: 1.15;
  margin-block: 0.5rem 0.6rem;
}

.stack-intro h2 span {
  color: var(--lapis);
}

.stack-tagline {
  color: var(--muted);
  font-size: 0.92rem;
  margin: 0 0 1.1rem;
  max-width: 32rem;
}

.stack-rules {
  display: grid;
  gap: 0.55rem;
  margin-bottom: 1.1rem;
}

.rule-chip {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.65rem 0.85rem;
  border-radius: 0.95rem;
  background: color-mix(in srgb, var(--panel) 80%, transparent);
  border: 1px solid var(--border-subtle);
}

.rule-icon {
  width: 32px;
  height: 32px;
  border-radius: 0.65rem;
  background: var(--lapis-soft);
  color: var(--lapis);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.rule-icon svg {
  width: 18px;
  height: 18px;
}

.rule-chip div {
  display: grid;
  gap: 0.1rem;
  font-size: 0.76rem;
  color: var(--muted);
  line-height: 1.6;
}

.rule-chip strong {
  color: var(--ink);
  font-size: 0.8rem;
}

.stack-modes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.3rem;
  padding: 0.3rem;
  border: 1px solid var(--border-subtle);
  border-radius: 0.95rem;
  background: color-mix(in srgb, var(--bg) 70%, transparent);
}

.stack-modes button {
  font: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  border: 0;
  background: transparent;
  color: var(--muted);
  border-radius: 0.65rem;
  padding: 0.45rem 0.25rem;
  min-height: 44px;
  cursor: pointer;
}

.stack-modes [aria-pressed="true"] {
  background: var(--panel);
  color: var(--ink);
}

.stack-modes button:disabled {
  cursor: default;
  opacity: 0.65;
}

.stack-modes [aria-pressed="true"]:disabled {
  opacity: 1;
}

#stack-mode-help {
  color: var(--muted);
  font-size: 0.74rem;
  margin: 0.45rem 0 1rem;
  min-height: 1.8em;
}

.stack-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
  margin-block: 0.9rem 1.1rem;
}

.stat-box {
  background: color-mix(in srgb, var(--panel) 86%, transparent);
  border: 1px solid var(--border-subtle);
  border-radius: 0.95rem;
  padding: 0.65rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.stat-rank {
  grid-column: 1 / -1;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.stat-box span {
  font-size: 0.68rem;
  color: var(--muted);
}

.stat-box strong {
  font-size: clamp(1.35rem, 2.6vw, 2.1rem);
  font-weight: 800;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.stat-best strong {
  color: var(--lapis);
}

.rank-badge {
  font-size: 0.82rem !important;
  font-weight: 700 !important;
  color: var(--turquoise);
}

@media (min-width: 480px) {
  .stack-modes {
    width: fit-content;
  }

  .stack-modes button {
    padding-inline: 0.95rem;
  }

  .stack-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .stat-rank {
    grid-column: auto;
    flex-direction: column;
    align-items: start;
    gap: 0.15rem;
  }

  .rank-badge {
    margin-top: auto;
  }
}

.stack-mission {
  margin-block: 0.9rem;
}

.stack-mission > div:first-child {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.45rem;
}

.stack-progress {
  height: 6px;
  border-radius: 99px;
  background: color-mix(in srgb, var(--line) 80%, var(--panel));
  overflow: hidden;
}

.stack-progress i {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--lapis);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 350ms var(--ease-spring) !important;
}

.stack-streak {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  font-size: 0.72rem;
  color: var(--muted);
  padding: 0.55rem 0.8rem;
  border-radius: 0.8rem;
  background: color-mix(in srgb, var(--panel) 65%, transparent);
  border: 1px solid var(--border-subtle);
}

#stack-streak-dots {
  display: flex;
  gap: 6px;
  direction: ltr;
  flex-shrink: 0;
}

#stack-streak-dots i {
  width: 11px;
  height: 11px;
  border: 1.5px solid var(--lapis);
  border-radius: 3px;
  transform: rotate(45deg);
  transition: background-color 220ms ease, transform 220ms var(--ease-spring) !important;
}

#stack-streak-dots [data-active="true"] {
  background: var(--turquoise);
  border-color: var(--turquoise);
  transform: rotate(45deg) scale(1.15);
}

.stack-input-hint {
  font-size: 0.7rem;
  color: var(--muted);
  margin: 0.85rem 0 0;
}

.stack-key-hint {
  display: block;
}

@media (pointer: coarse) {
  .stack-key-hint {
    display: none;
  }
}

.stack-machine {
  min-width: 0;
  background: var(--panel);
  position: relative;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border-subtle);
}

@media (min-width: 860px) {
  .stack-machine {
    border-top: 0;
    border-right: 1px solid var(--border-subtle);
  }
}

.stack-machine-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.7rem;
  padding: 0.9rem 1.25rem;
  font-size: 0.74rem;
  color: var(--muted);
  border-bottom: 1px solid var(--border-subtle);
}

.machine-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 700;
  color: var(--ink);
}

.machine-led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--turquoise);
}

.stack-machine-top .btn {
  font-size: 0.74rem;
  padding: 0.35rem 0.8rem;
  min-height: 36px;
  border-radius: 99px;
}

.stack-controls {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.stack-controls #stack-sound {
  width: 44px;
  min-height: 44px;
  padding: 0;
}

#stack-sound svg {
  width: 18px;
  height: 18px;
}

#stack-sound[aria-pressed="true"] .sound-off,
#stack-sound[aria-pressed="false"] .sound-on {
  display: none;
}

#stack-scene {
  display: block;
  width: 100%;
  max-height: 450px;
  color: var(--lapis);
  cursor: pointer;
  touch-action: manipulation;
  user-select: none;
}

.stack-shadow {
  fill: var(--lapis);
  opacity: 0.12;
}

html[data-motion="full"] #stack-camera {
  transition: transform 380ms cubic-bezier(0.2, 0.8, 0.2, 1) !important;
}

.block-top {
  fill: var(--lapis);
  stroke: var(--panel);
  stroke-width: 0.6;
}

.block-front {
  fill: color-mix(in srgb, var(--lapis) 74%, var(--bg));
}

.block-side {
  fill: color-mix(in srgb, var(--lapis) 48%, var(--bg));
}

#stack-moving .block-top {
  stroke: var(--turquoise);
  stroke-width: 1.4;
}

.stack-ring {
  fill: none;
  stroke: var(--turquoise);
  stroke-width: 2;
  pointer-events: none;
}

#stack-combo {
  fill: var(--turquoise);
  font-family: inherit;
  font-size: 24px;
  font-weight: 800;
}

.stack-console {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: 0.9rem 1.25rem 1.25rem;
  margin-top: auto;
  border-top: 1px solid var(--border-subtle);
  background: color-mix(in srgb, var(--bg) 55%, var(--panel));
}

#stack-summary {
  display: grid;
  gap: 0.35rem;
  padding: 0.85rem 1rem;
  border: 1px solid color-mix(in srgb, var(--lapis) 28%, var(--line));
  border-radius: 1rem;
  background: var(--lapis-soft);
}

#stack-summary[hidden] {
  display: none;
}

.summary-eyebrow {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--lapis);
}

#stack-summary > strong {
  font-size: 1rem;
  color: var(--ink);
}

.summary-metrics {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  font-size: 0.74rem;
  color: var(--muted);
}

#stack-message {
  font-size: 0.82rem;
  min-height: 2.8em;
  margin: 0;
  color: var(--muted);
}

#stack-action {
  min-height: 48px;
  font-size: 0.95rem;
  font-weight: 700;
  width: 100%;
  border-radius: 0.9rem;
}

/* Maker Section (Pezhman Sarmadi) */
.about-maker {
  display: grid;
  gap: 2rem;
  margin-block: 3.5rem;
  padding: clamp(1.35rem, 3.5vw, 2.6rem);
  background: var(--panel);
  border: 1px solid var(--border-subtle);
  border-radius: 1.8rem;
  align-items: center;
}

@media (min-width: 820px) {
  .about-maker {
    grid-template-columns: 290px 1fr;
    gap: 2.8rem;
  }
}

.maker-visual-wrap {
  display: grid;
  place-items: center;
}

#maker-signature {
  position: relative;
  border: 1px solid color-mix(in srgb, var(--lapis) 28%, transparent);
  font-family: inherit;
  cursor: pointer;
  width: 100%;
  max-width: 280px;
  aspect-ratio: 1.15;
  background: var(--lapis-soft);
  color: var(--lapis);
  border: 1px solid var(--border-subtle);
  border-radius: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 1.25rem;
  text-align: center;
  transition: background-color 200ms ease, transform 200ms var(--ease-spring);
}

.maker-monogram {
  font-size: clamp(3.4rem, 7vw, 4.6rem);
  font-weight: 900;
  letter-spacing: -0.07em;
  line-height: 1;
  color: var(--lapis);
}

.maker-secret-hint {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--muted);
  line-height: 1.5;
}

@media (hover: hover) and (pointer: fine) {
  #maker-signature:hover {
    transform: translateY(-2px);
    background: var(--panel);
  }
}

.maker-bio {
  min-width: 0;
}

.maker-bio h2 {
  margin-bottom: 0.15rem;
}

.maker-latin {
  font-size: 1rem;
  font-weight: 700;
  color: var(--turquoise);
  margin: 0 0 0.9rem;
  text-align: start;
}

.maker-latin span {
  color: var(--muted);
  font-weight: 500;
}

.maker-bio p {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0 0 0.85rem;
}

.maker-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.25rem;
}

.social-pill {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.5rem 0.9rem;
  border-radius: 0.85rem;
  background: var(--bg);
  border: 1px solid var(--border-subtle);
  text-decoration: none;
  font-size: 0.78rem;
  font-weight: 600;
  max-width: 100%;
  transition: transform 160ms ease-out;
}

.social-pill svg {
  width: 18px;
  height: 18px;
  color: var(--lapis);
  flex-shrink: 0;
}

.social-pill span {
  overflow: hidden;
  text-overflow: ellipsis;
}

.ext-arrow {
  color: var(--muted);
  font-size: 0.75rem;
}

@media (hover: hover) and (pointer: fine) {
  .social-pill:hover {
    border-color: var(--lapis);
    background: var(--lapis-soft);
    transform: translateY(-1px);
  }
}

/* FAQ Section */
.about-faq {
  display: grid;
  gap: 2rem;
  padding-block: 2rem 4rem;
  align-items: start;
}

@media (min-width: 900px) {
  .about-faq {
    grid-template-columns: 1fr 1.55fr;
    gap: 3.2rem;
  }
  .faq-sidebar {
    position: sticky;
    top: 5.5rem;
  }
}

.faq-sidebar h2 span {
  color: var(--lapis);
}

.faq-sidebar > p {
  max-width: 26rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.faq-contact {
  display: grid;
  grid-template-columns: 32px 1fr;
  column-gap: 0.8rem;
  row-gap: 0.25rem;
  padding: 1.1rem;
  background: var(--lapis-soft);
  border: 1px solid color-mix(in srgb, var(--lapis) 22%, transparent);
  border-radius: 1.1rem;
  font-size: 0.8rem;
  margin-top: 1.5rem;
}

.faq-contact svg {
  width: 26px;
  height: 26px;
  color: var(--lapis);
  grid-row: span 2;
}

.faq-contact a {
  color: var(--lapis);
  font-weight: 700;
  text-underline-offset: 0.3rem;
  width: fit-content;
}

.faq-content {
  min-width: 0;
}

.faq-search {
  display: flex;
  gap: 0.7rem;
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--border-subtle);
  border-radius: 1rem;
  padding: 0.65rem 0.95rem;
}

.faq-search:focus-within {
  outline: 2px solid var(--lapis);
  outline-offset: 2px;
}

.faq-search svg {
  width: 20px;
  height: 20px;
  color: var(--muted);
  flex-shrink: 0;
}

.faq-search input {
  width: 100%;
  min-width: 0;
  font: inherit;
  font-size: 0.85rem;
  border: 0;
  outline: 0 !important;
  background: transparent;
  color: var(--ink);
  min-height: 32px;
}

.faq-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-block: 0.9rem;
}

.faq-filters button {
  font: inherit;
  font-size: 0.76rem;
  font-weight: 600;
  border: 1px solid var(--border-subtle);
  border-radius: 0.55rem;
  background: var(--panel);
  color: var(--muted);
  padding: 0.45rem 0.9rem;
  min-height: 40px;
  cursor: pointer;
  transition: transform 150ms ease-out;
}

.faq-filters button[aria-pressed="true"] {
  background: var(--lapis);
  color: var(--panel);
  border-color: var(--lapis);
}

#faq-count {
  font-size: 0.74rem;
  color: var(--muted);
  margin: 0 0 0.85rem;
}

.faq-list {
  display: grid;
  border-block-end: 1px solid var(--border-subtle);
}

.faq-item {
  border-block-start: 1px solid var(--border-subtle);
  overflow: hidden;
  transition: background-color 200ms ease;
}

.faq-item[hidden] {
  display: none;
}

.faq-item[data-expanded="true"] {
  background: color-mix(in srgb, var(--lapis-soft) 55%, var(--panel));
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.9rem;
  min-height: 68px;
  padding: 1rem 1.15rem;
  cursor: pointer;
  font-size: 0.92rem;
  font-weight: 700;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-plus {
  width: 24px;
  height: 24px;
  padding: 3px;
  border-radius: 50%;
  background: var(--lapis-soft);
  flex-shrink: 0;
  color: var(--lapis);
  transition: transform 320ms var(--ease-spring), background-color 200ms ease !important;
}

.faq-item[data-expanded="true"] .faq-plus {
  transform: rotate(45deg);
  background: var(--lapis);
  color: var(--panel);
}

.faq-answer {
  padding: 0 1.15rem 1.15rem;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 2;
}

.faq-answer p {
  margin: 0;
}

.faq-answer a {
  color: var(--lapis);
  font-weight: 600;
  text-underline-offset: 0.3rem;
}

#faq-empty {
  padding: 2rem 1.25rem;
  text-align: center;
  background: var(--panel);
  border-radius: 1.1rem;
  border: 1px dashed var(--border-subtle);
}

#faq-empty[hidden] {
  display: none;
}

#faq-empty p {
  color: var(--muted);
  font-size: 0.84rem;
}

/* Footer */
.about-footer {
  display: grid;
  gap: 1.5rem;
  padding-block: 1.5rem 3.5rem;
}

.footer-cta-banner {
  border-block: 1px solid var(--border-subtle);
  padding: clamp(1.25rem, 3vw, 2.2rem) 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.footer-cta-banner h2 {
  margin: 0;
  font-size: clamp(1.35rem, 2.5vw, 1.95rem);
}

.footer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  font-size: 0.78rem;
  color: var(--muted);
}

.footer-mini-links {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
}

.footer-mini-links a {
  text-decoration: none;
  color: var(--muted);
}

@media (hover: hover) and (pointer: fine) {
  .footer-mini-links a:hover {
    color: var(--lapis);
  }
}