/* Kinetix.fitness — CC IA/CSS architecture, Kinetix tokens */

:root {
  --kx-font-ui: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --kx-font-display: "Archivo ExtraBold", "Inter", system-ui, sans-serif;
  --kx-font-mono: "JetBrains Mono", "SFMono-Regular", ui-monospace, monospace;
  --kx-focus: 0 0 0 2px var(--bg), 0 0 0 4px var(--primary);
  --kx-transition: 180ms ease-out;
  --site-max: 1120px;
  --site-pad: clamp(20px, 4vw, 40px);
}

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

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--txt);
  font-family: var(--kx-font-ui);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: #ff8a8f; }
a:focus-visible,
button:focus-visible {
  outline: none;
  box-shadow: var(--kx-focus);
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 12px 16px;
  background: var(--primary);
  color: var(--primary-ink);
  font-weight: 700;
}
.skip:focus { left: var(--site-pad); top: 12px; }

.wrap {
  width: min(100% - (var(--site-pad) * 2), var(--site-max));
  margin-inline: auto;
}

/* wordmark */
.wm {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  color: inherit;
  text-decoration: none;
}
.wm__mark {
  width: 32px;
  height: 32px;
  flex: 0 0 auto;
}
.wm__wordmark {
  height: 15px;
  width: auto;
  display: block;
}
.wm__banner {
  height: 36px;
  width: auto;
  display: block;
  max-width: min(280px, 70vw);
}
.wm__type {
  font-family: var(--kx-font-display);
  font-size: 18px;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--txt);
}
.wm--hero {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin: 0;
  pointer-events: none;
}
.wm--hero .wm__mark {
  width: clamp(56px, 9vw, 72px);
  height: clamp(56px, 9vw, 72px);
}
.wm--hero .wm__wordmark {
  height: clamp(26px, 4.2vw, 36px);
  width: auto;
  max-width: min(280px, 68vw);
}
.wm__lockup {
  width: min(280px, 72vw);
  height: auto;
  display: block;
}
.wm__lockup--v {
  width: min(220px, 58vw);
}

/* nav */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  padding-top: env(safe-area-inset-top, 0);
}
@supports not (backdrop-filter: blur(12px)) {
  .site-nav { background: var(--bg); }
}
.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
}
.site-nav__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-nav__links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 12px;
  border-radius: var(--r-sm);
  color: var(--txt-dim);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: background-color var(--kx-transition), color var(--kx-transition);
}
.site-nav__links a:hover,
.site-nav__links a[aria-current="page"] {
  color: var(--txt);
  background: var(--panel-2);
}
.site-nav__toggle {
  display: none;
  min-height: 44px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--panel);
  color: var(--txt);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
@media (max-width: 860px) {
  .site-nav__toggle { display: inline-flex; align-items: center; }
  .site-nav__links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    padding-bottom: 12px;
  }
  .site-nav.is-open .site-nav__links { display: flex; }
  .site-nav__inner { flex-wrap: wrap; }
}

/* buttons / pills */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: var(--r-sm);
  font-family: var(--kx-font-display);
  font-size: 14px;
  letter-spacing: 0.01em;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform var(--kx-transition), filter var(--kx-transition), background var(--kx-transition);
}
.btn:hover { transform: translateY(-1px); }
.btn--primary {
  background: var(--primary);
  color: var(--primary-ink);
  box-shadow: var(--glow-primary);
}
.btn--primary:hover { filter: brightness(1.05); color: var(--primary-ink); }
.btn--ghost {
  background: transparent;
  color: var(--txt);
  border-color: var(--line-2);
}
.btn--ghost:hover { background: var(--panel-2); color: var(--txt); }
.btn--disabled,
.btn[aria-disabled="true"] {
  opacity: 0.55;
  pointer-events: none;
  box-shadow: none;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 28px;
  padding: 4px 10px;
  border-radius: var(--r-pill);
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--txt-dim);
  font-family: var(--kx-font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.pill--live { color: var(--txt); border-color: var(--primary-edge); background: var(--primary-soft); }
.pill--works { color: var(--nerve); border-color: color-mix(in srgb, var(--nerve) 40%, var(--line)); }

.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 0 rgba(255, 92, 99, 0.55);
  animation: live-pulse 2.2s ease-out infinite;
}
@keyframes live-pulse {
  0% { box-shadow: 0 0 0 0 rgba(255, 92, 99, 0.5); }
  70% { box-shadow: 0 0 0 10px rgba(255, 92, 99, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 92, 99, 0); }
}

/* explore — CC-parity left stack */
.explore { position: relative; overflow: visible; }
.explore__glow {
  position: absolute;
  left: -10%;
  top: -18%;
  width: min(72vw, 680px);
  height: min(72vw, 680px);
  background: radial-gradient(circle, rgba(255, 92, 99, 0.2), transparent 65%);
  pointer-events: none;
  animation: glow-drift 8s ease-in-out infinite alternate;
  z-index: 0;
}
@keyframes glow-drift {
  from { transform: translate(0, 0) scale(1); opacity: 0.85; }
  to { transform: translate(4%, 6%) scale(1.06); opacity: 1; }
}
.explore__inner {
  position: relative;
  z-index: 1;
  padding: clamp(48px, 10vh, 120px) 0 clamp(64px, 10vh, 120px);
  display: grid;
  gap: clamp(40px, 6vw, 72px);
}
.explore__brand {
  display: grid;
  gap: 28px;
  justify-items: start;
  max-width: 42rem;
  animation: none;
}
.explore__brand--alive > * {
  animation: rise-in 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
}
.explore__brand--alive > *:nth-child(1) { animation-delay: 0.05s; }
.explore__brand--alive > *:nth-child(2) { animation-delay: 0.12s; }
.explore__brand--alive > *:nth-child(3) { animation-delay: 0.18s; }
.explore__brand--alive > *:nth-child(4) { animation-delay: 0.24s; }
.explore__brand--alive > *:nth-child(5) { animation-delay: 0.3s; }
.explore__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  color: var(--primary);
  font-family: var(--kx-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.explore__headline {
  margin: 0;
  font-family: var(--kx-font-display);
  font-size: clamp(1.85rem, 4.8vw, 2.75rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  max-width: 16ch;
}
.explore__lede {
  margin: 0;
  color: var(--txt-dim);
  max-width: 42ch;
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  line-height: 1.55;
}
.explore__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
}
.explore__line {
  margin: 0;
  font-family: var(--kx-font-display);
  font-size: clamp(1.1rem, 2.4vw, 1.35rem);
  color: var(--primary);
  letter-spacing: -0.02em;
}

@keyframes rise-in {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: none; }
}

/* atlas explorer */
.atlas-section {
  margin-top: clamp(48px, 8vw, 80px);
  animation: rise-in 800ms cubic-bezier(0.22, 1, 0.36, 1) 120ms both;
}
.atlas-section__head {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
}
.atlas-section__head h2 {
  margin: 0;
  font-family: var(--kx-font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.02em;
}
.atlas-section__head p {
  margin: 0;
  color: var(--txt-dim);
  max-width: 52ch;
}
.atlas__plate:focus-visible {
  outline: none;
  box-shadow: var(--kx-focus);
  border-radius: var(--r-lg);
}
.picker:focus-visible {
  outline: none;
  box-shadow: var(--kx-focus);
  border-radius: var(--r-lg);
}

.atlas {
  display: grid;
  gap: 16px;
  padding: clamp(20px, 4vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: visible;
  background:
    radial-gradient(70% 55% at 50% 24%, color-mix(in srgb, var(--active-hex, #ff5c63) 12%, transparent), transparent 58%),
    var(--panel);
  transition: background 320ms ease;
}
.atlas__stage {
  display: grid;
  justify-items: center;
  gap: 12px;
  width: 100%;
  max-width: 780px;
  margin-inline: auto;
  overflow: visible;
}

/* App-faithful interactive plate — spotlight leads */
.atlas__plate {
  position: relative;
  width: min(640px, 100%);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  box-sizing: border-box;
  --active-hex: #ff5c63;
  overflow: visible;
}
.atlas__aura {
  position: absolute;
  inset: 16%;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--active-hex) 26%, transparent), transparent 70%);
  pointer-events: none;
  animation: aura-breathe 4.8s ease-in-out infinite;
  z-index: 0;
  transition: background 280ms ease;
}
.atlas__svg {
  position: relative;
  z-index: 1;
  width: 100%;
  height: auto;
  overflow: visible;
  display: block;
  touch-action: manipulation;
}
.atlas__figure {
  opacity: 0.96;
}
.atlas__arc {
  stroke-width: 4.8;
  opacity: 0.7;
  transition:
    stroke-width 320ms cubic-bezier(0.22, 1, 0.36, 1),
    opacity 260ms ease;
  pointer-events: none;
}
.atlas__arc.is-dim {
  opacity: 0.26;
  stroke-width: 3.8;
}
.atlas__arc.is-hover:not(.is-focused) {
  opacity: 0.88;
  stroke-width: 5.8;
}
.atlas__arc.is-focused {
  opacity: 1;
  stroke-width: 7.6;
  filter: url(#atlas-glow);
}
.atlas__hit {
  stroke: transparent;
  stroke-width: 14;
  fill: none;
  cursor: pointer;
  pointer-events: stroke;
  outline: none;
}
.atlas__hit:focus-visible {
  stroke: color-mix(in srgb, var(--active-hex) 50%, #fff);
  stroke-opacity: 0.4;
}
.atlas__label {
  font-family: var(--kx-font-mono);
  font-size: 3px;
  font-weight: 700;
  letter-spacing: 0.08em;
  fill: var(--txt-dim-2);
  transition: fill 240ms ease, opacity 240ms ease;
  opacity: 0.7;
}
.atlas__label.is-dim { opacity: 0.32; }
.atlas__label.is-focused {
  fill: var(--active-hex);
  opacity: 1;
}
.atlas__hint {
  position: static;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 6px 12px;
  border-radius: var(--r-pill);
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--txt-dim);
  font-family: var(--kx-font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

/* Unified prev/next detail picker — wider strip, subordinate to spotlight */
.atlas__swapper {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) 40px;
  gap: 10px;
  align-items: stretch;
  width: 100%;
  max-width: 640px;
  margin-top: 2px;
}
.atlas__nav {
  appearance: none;
  width: 40px;
  align-self: center;
  height: 40px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--txt);
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background var(--kx-transition), border-color var(--kx-transition), transform var(--kx-transition);
}
.atlas__nav:hover {
  background: var(--panel-3);
  border-color: var(--line-2);
  transform: translateY(-1px);
}
.atlas__swap {
  overflow: hidden;
  border-radius: var(--r);
  border: 1px solid var(--line);
  background: var(--panel-2);
  height: 17.5rem;
  flex: 0 0 auto;
}
.atlas__swap-card {
  height: 100%;
  box-sizing: border-box;
  padding: 12px 16px 13px;
  border-left: 3px solid var(--sys, var(--primary));
  display: grid;
  align-content: start;
  gap: 3px;
  overflow: auto;
  overscroll-behavior: contain;
  transition: border-color 280ms ease, transform 180ms cubic-bezier(0.22, 1, 0.36, 1), opacity 180ms ease;
  will-change: transform, opacity;
  touch-action: pan-y;
  user-select: none;
}
.atlas__swap-card.is-exit-left {
  opacity: 0;
  transform: translateX(-18px);
}
.atlas__swap-card.is-exit-right {
  opacity: 0;
  transform: translateX(18px);
}
.atlas__swap-card.is-enter-left {
  animation: swap-in-left 220ms cubic-bezier(0.22, 1, 0.36, 1);
}
.atlas__swap-card.is-enter-right {
  animation: swap-in-right 220ms cubic-bezier(0.22, 1, 0.36, 1);
}
@keyframes swap-in-left {
  from { opacity: 0; transform: translateX(-18px); }
  to { opacity: 1; transform: none; }
}
@keyframes swap-in-right {
  from { opacity: 0; transform: translateX(18px); }
  to { opacity: 1; transform: none; }
}
.atlas__swap-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 2px;
}
.atlas__swap-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--kx-font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--txt-dim);
}
.atlas__swap-index {
  font-family: var(--kx-font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--txt-dim-2);
}
.atlas__swap-abbr {
  font-family: var(--kx-font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--sys, var(--primary));
}
.atlas__swap-name {
  margin: 0;
  font-family: var(--kx-font-display);
  font-size: clamp(1.12rem, 2.2vw, 1.35rem);
  letter-spacing: -0.02em;
  font-weight: 800;
  line-height: 1.15;
}
.atlas__swap-domain {
  margin: 0;
  color: var(--txt-dim);
  font-size: 0.86rem;
  line-height: 1.35;
}
.atlas__swap-anatomy,
.atlas__swap-fitness {
  margin: 4px 0 0;
  color: var(--txt-dim);
  font-size: 0.82rem;
  line-height: 1.4;
  max-width: none;
}
.atlas__swap-anatomy {
  color: var(--txt-dim);
}
.atlas__swap-fitness {
  padding-top: 6px;
  border-top: 1px solid var(--line);
}
.atlas__swap-note {
  margin: 6px 0 0;
  font-family: var(--kx-font-mono);
  font-size: 9px;
  letter-spacing: 0.04em;
  color: var(--txt-dim-2);
  line-height: 1.4;
}

.atlas--pulse .atlas__aura {
  animation:
    aura-breathe 4.8s ease-in-out infinite,
    aura-flash 380ms ease-out;
}
@keyframes aura-breathe {
  0%, 100% { transform: scale(1); opacity: 0.75; }
  50% { transform: scale(1.05); opacity: 1; }
}
@keyframes aura-flash {
  0% { opacity: 0.45; transform: scale(0.98); }
  45% { opacity: 1; transform: scale(1.08); }
  100% { opacity: 0.85; transform: scale(1); }
}
@media (prefers-reduced-motion: reduce) {
  .atlas__aura { animation: none; }
  .atlas--pulse .atlas__aura { animation: none; }
  .atlas__swap-card.is-enter-left,
  .atlas__swap-card.is-enter-right { animation: none; }
  .atlas__arc { transition: none; }
}

/* page chrome */
.page-hero {
  padding: clamp(40px, 7vw, 72px) 0 28px;
  border-bottom: 1px solid var(--line);
}
.page-hero__eyebrow {
  margin: 0 0 10px;
  font-family: var(--kx-font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
}
.page-hero h1 {
  margin: 0;
  font-family: var(--kx-font-display);
  font-size: clamp(2rem, 4.5vw, 3rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
  max-width: 16ch;
}
.page-hero__lede {
  margin: 14px 0 0;
  color: var(--txt-dim);
  max-width: 52ch;
  font-size: 1.05rem;
}

.section { padding: clamp(40px, 7vw, 72px) 0; }
.section-title {
  margin: 0 0 14px;
  font-family: var(--kx-font-display);
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  letter-spacing: -0.02em;
}
.stack { display: grid; gap: 24px; }
.prose { max-width: 62ch; color: var(--txt-dim); }
.prose strong { color: var(--txt); }
.prose p { margin: 0 0 1em; }

.feature-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.feature {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--panel);
}
.feature h3 {
  margin: 0 0 8px;
  font-family: var(--kx-font-display);
  font-size: 1.05rem;
}
.feature p { margin: 0; color: var(--txt-dim); font-size: 0.95rem; }

/* Product / generic spotlight picker (atlas-parity) */
.picker {
  --active-hex: #ff8a52;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: clamp(20px, 4vw, 40px);
  background:
    radial-gradient(70% 60% at 50% 22%, color-mix(in srgb, var(--active-hex) 16%, transparent), transparent 62%),
    var(--panel);
  transition: background 320ms ease;
  overflow: visible;
}
.picker__stage {
  display: grid;
  justify-items: center;
  gap: 12px;
  width: 100%;
  max-width: 780px;
  margin-inline: auto;
}
.picker__plate {
  position: relative;
  width: min(560px, 100%);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  isolation: isolate;
}
.picker__aura {
  position: absolute;
  inset: 8%;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--active-hex) 34%, transparent), transparent 68%);
  pointer-events: none;
  animation: aura-breathe 4.8s ease-in-out infinite;
  z-index: 0;
  transition: background 280ms ease;
}
.picker__mark-wrap {
  position: relative;
  z-index: 1;
  width: 72%;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  transition: transform 280ms cubic-bezier(0.22, 1, 0.36, 1), opacity 220ms ease, filter 280ms ease;
  filter: drop-shadow(0 0 22px color-mix(in srgb, var(--active-hex) 45%, transparent));
}
.picker__mark-wrap.is-swap {
  animation: picker-mark-swap 360ms cubic-bezier(0.22, 1, 0.36, 1);
}
@keyframes picker-mark-swap {
  0% { opacity: 0.45; transform: scale(0.92); }
  55% { opacity: 1; transform: scale(1.04); }
  100% { opacity: 1; transform: scale(1); }
}
.picker__mark {
  width: 100%;
  height: auto;
  display: block;
}
.picker__hint {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 6px 12px;
  border-radius: var(--r-pill);
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--txt-dim);
  font-family: var(--kx-font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}
.picker__dots {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: center;
}
.picker__dot {
  appearance: none;
  width: 10px;
  height: 10px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--active-hex) 45%, var(--line));
  background: var(--panel-2);
  cursor: pointer;
  transition: background 200ms ease, transform 200ms ease, box-shadow 200ms ease;
}
.picker__dot.is-active {
  background: var(--active-hex);
  box-shadow: 0 0 12px color-mix(in srgb, var(--active-hex) 55%, transparent);
  transform: scale(1.15);
}
.picker__swapper {
  width: 100%;
  max-width: 560px;
}
.picker__card .pill {
  justify-self: start;
  margin: 2px 0 2px;
}
.picker--pulse .picker__aura {
  animation:
    aura-breathe 4.8s ease-in-out infinite,
    aura-flash 380ms ease-out;
}
@media (prefers-reduced-motion: reduce) {
  .picker__aura { animation: none; }
  .picker--pulse .picker__aura { animation: none; }
  .picker__mark-wrap.is-swap { animation: none; }
}

/* vocab */
.vocab {
  display: grid;
  gap: 10px;
}
@media (min-width: 720px) {
  .vocab { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
.vocab__row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 10px;
  align-items: center;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--panel-2);
}
.vocab__from {
  color: var(--txt-dim-2);
  text-decoration: line-through;
  font-size: 0.92rem;
}
.vocab__arrow {
  font-family: var(--kx-font-mono);
  color: var(--primary);
  font-size: 0.75rem;
}
.vocab__to {
  font-family: var(--kx-font-display);
  font-size: 1rem;
}

/* app frames */
.frame-rail { display: grid; gap: 28px; }
.frame-block h3 {
  margin: 0 0 8px;
  font-family: var(--kx-font-display);
  font-size: 1.15rem;
}
.frame-block > p {
  margin: 0 0 14px;
  color: var(--txt-dim);
  max-width: 56ch;
}
.app-frame {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--panel);
}
.app-frame__chrome {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--panel-2);
}
.app-frame__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--line-2);
}
.app-frame__dot:nth-child(1) { background: #ff5c63; }
.app-frame__dot:nth-child(2) { background: #e8c24a; }
.app-frame__dot:nth-child(3) { background: #3ed598; }
.app-frame__title {
  margin-left: 8px;
  font-family: var(--kx-font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--txt-dim-2);
  text-transform: uppercase;
}
.app-shell-demo {
  display: grid;
  grid-template-columns: 160px 1fr;
  min-height: 260px;
}
@media (max-width: 700px) {
  .app-shell-demo { grid-template-columns: 1fr; }
  .parent-rail-demo { border-right: 0; border-bottom: 1px solid var(--line); }
}
.parent-rail-demo {
  padding: 16px;
  border-right: 1px solid var(--line);
  background: #0e1014;
}
.parent-rail-demo__id {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}
.parent-rail-demo__id img { width: 28px; height: 28px; }
.parent-rail-demo__wm {
  font-family: var(--kx-font-display);
  font-size: 13px;
}
.parent-rail-demo__eyebrow {
  margin: 0 0 8px;
  font-family: var(--kx-font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--txt-dim-2);
}
.parent-rail-demo__nav {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}
.parent-rail-demo__nav li {
  padding: 8px 10px;
  border-radius: var(--r-sm);
  color: var(--txt-dim);
  font-size: 13px;
  font-weight: 600;
}
.parent-rail-demo__nav li.is-active {
  background: var(--primary-soft);
  color: var(--txt);
}
.workspace-demo { padding: 18px; }
.workspace-demo h4 {
  margin: 0 0 8px;
  font-family: var(--kx-font-display);
}
.workspace-demo p { margin: 0; color: var(--txt-dim); font-size: 0.95rem; }
.system-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.system-chip {
  min-width: 64px;
  padding: 8px 10px;
  border-radius: var(--r-sm);
  border-top: 3px solid var(--sys);
  background: var(--panel-2);
  font-family: var(--kx-font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
}
.readout-row {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}
.readout-row__item {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--panel-2);
}
.readout-row__item strong {
  display: block;
  font-family: var(--kx-font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--txt-dim-2);
  font-weight: 400;
}
.readout-row__item span {
  display: block;
  margin-top: 6px;
  font-family: var(--kx-font-display);
  font-size: 1.05rem;
}

/* legal */
.legal h2 {
  margin: 0 0 12px;
  font-family: var(--kx-font-display);
  font-size: 1.35rem;
}
.legal h3 {
  margin: 24px 0 8px;
  font-family: var(--kx-font-display);
  font-size: 1.05rem;
}
.legal ul { color: var(--txt-dim); }
.legal-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 28px;
}

/* footer */
.site-footer {
  margin-top: 40px;
  border-top: 1px solid var(--line);
  padding: 28px 0 calc(40px + env(safe-area-inset-bottom, 0px));
}
.site-footer__inner { display: grid; gap: 20px; }
.site-footer__top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}
.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-footer__links a {
  color: var(--txt-dim);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
}
.site-footer__links a:hover { color: var(--txt); }
.site-footer__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  color: var(--txt-dim-2);
  font-family: var(--kx-font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.site-footer__meta a { color: var(--txt-dim); text-decoration: none; }
.site-footer__meta a:hover { color: var(--primary); }

/* Mobile + tablet QoL */
@media (max-width: 700px) {
  .explore__inner {
    padding: clamp(32px, 7vw, 56px) 0 40px;
    gap: 36px;
  }
  .explore__brand {
    gap: 20px;
    max-width: none;
  }
  .explore__headline {
    max-width: 12ch;
    font-size: clamp(1.75rem, 8vw, 2.25rem);
  }
  .explore__lede {
    max-width: none;
    font-size: 1.02rem;
  }
  .explore__cta {
    width: 100%;
  }
  .explore__cta .btn {
    flex: 1 1 auto;
    min-width: min(100%, 140px);
  }
  .atlas-section {
    margin-top: 28px;
  }
  .atlas-section__head {
    margin-bottom: 12px;
  }
  .atlas {
    padding: 10px;
    gap: 10px;
    border-radius: var(--r);
  }
  .atlas__stage,
  .picker__stage {
    max-width: none;
    gap: 10px;
  }
  .atlas__plate,
  .picker__plate {
    width: 100%;
  }
  .picker {
    padding: 10px;
    border-radius: var(--r);
  }
  .atlas__hint {
    font-size: 9px;
    padding: 5px 10px;
    white-space: normal;
    text-align: center;
    line-height: 1.35;
  }
  .atlas__swapper,
  .picker__swapper {
    width: 100%;
    max-width: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-areas:
      "card card"
      "prev next";
    gap: 8px;
  }
  .atlas__swap {
    grid-area: card;
    height: 21rem;
  }
  .atlas__nav--prev { grid-area: prev; }
  .atlas__nav--next { grid-area: next; }
  .atlas__nav {
    width: 100%;
    height: 44px;
    font-size: 22px;
  }
  .atlas__swap-card { padding: 12px 14px; }
  .atlas__swap-name { font-size: 1.2rem; }
  .atlas__swap-anatomy,
  .atlas__swap-fitness {
    font-size: 0.8rem;
    line-height: 1.35;
  }
  .page-hero {
    padding: clamp(28px, 6vw, 48px) 0 22px;
  }
  .page-hero h1 {
    max-width: none;
    font-size: clamp(1.65rem, 7vw, 2.25rem);
  }
  .section { padding: clamp(28px, 6vw, 48px) 0; }
  .feature-grid { grid-template-columns: 1fr; }
  .site-footer__top {
    flex-direction: column;
    align-items: flex-start;
  }
  .site-footer__links { gap: 10px 16px; }
  .wm { gap: 10px; }
  .wm__wordmark {
    height: 13px;
    max-width: 42vw;
  }
  .wm__mark {
    width: 28px;
    height: 28px;
  }
  .wm--hero .wm__wordmark {
    max-width: min(240px, 70vw);
  }
}

@media (max-width: 380px) {
  .explore__cta .btn { width: 100%; }
  .wm__wordmark { max-width: 38vw; }
}

@media (min-width: 901px) {
  .atlas,
  .picker {
    padding: clamp(28px, 3.5vw, 48px);
  }
}