/* ============================================================
   Argon Labs — noble-gas design system
   Built on the glow of gas-discharge tubes: a cobalt-blue brand
   accent, neon red-orange as the pop color, and helium /
   krypton / xenon tinting the element tiles.
   ============================================================ */

:root {
  color-scheme: light dark;

  /* Brand hue — every blue in the system derives from this one angle,
     including the subtle tint on neutrals and the dark bands.
     Lightness/chroma/ink are tokens so a future bright accent (gold,
     yellow) could run light-with-dark-ink by overriding them. */
  --hue: 262;
  --accent-l: 50%;
  --accent-c: 0.21;
  --bright-l: 70%;
  --bright-c: 0.17;
  --accent-ink-l: 98.5%;
  --accent-ink-c: 0.005;

  /* Discharge colors */
  --argon: oklch(var(--accent-l) var(--accent-c) var(--hue));
  --argon-bright: oklch(var(--bright-l) var(--bright-c) var(--hue));
  --neon: oklch(66% 0.2 38);
  --helium: oklch(72% 0.13 62);
  --krypton: oklch(62% 0.13 162);
  /* Xenon sits at sky-cyan rather than its truer 255 blue so the card
     tint stays clearly distinct from the cobalt brand accent. */
  --xenon: oklch(63% 0.13 215);

  /* Surfaces & text — neutrals tinted toward the brand hue */
  --bg: light-dark(oklch(97.6% 0.006 var(--hue)), oklch(16.5% 0.014 var(--hue)));
  --surface: light-dark(oklch(99.3% 0.004 var(--hue)), oklch(20.5% 0.014 var(--hue)));
  --text: light-dark(oklch(21% 0.02 var(--hue)), oklch(93.5% 0.01 var(--hue)));
  --text-2: light-dark(oklch(46% 0.02 var(--hue)), oklch(71% 0.015 var(--hue)));
  --line: light-dark(oklch(88.5% 0.014 var(--hue)), oklch(31% 0.02 var(--hue)));
  --accent: light-dark(var(--argon), var(--argon-bright));
  --accent-ink: oklch(var(--accent-ink-l) var(--accent-ink-c) var(--hue));

  /* The "lab at night" — dark bands stay dark in both modes */
  --dark: oklch(14.5% 0.024 var(--hue));
  --dark-ink: oklch(95% 0.01 var(--hue));
  --dark-ink-2: oklch(72% 0.02 var(--hue));

  --font-display: "Bricolage Grotesque", system-ui, sans-serif;
  --font-body: "Instrument Sans", system-ui, sans-serif;

  --radius-btn: 0.85rem;
  --radius-card: 1.1rem;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection {
  background: var(--neon);
  color: var(--dark);
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.08;
}

a {
  color: inherit;
}

.wrap {
  max-width: 72rem;
  margin: 0 auto;
  padding-inline: 1.5rem;
}

/* A faint violet discharge bloom behind the hero */
.hero-wash {
  background:
    radial-gradient(50rem 30rem at 85% -8rem, color-mix(in oklch, var(--accent) 10%, transparent), transparent 70%),
    radial-gradient(36rem 24rem at 0% 18rem, color-mix(in oklch, var(--neon) 7%, transparent), transparent 70%);
}

/* ---------- The Ar mark: a periodic-table tile ---------- */
.ar-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 30%;
  background: var(--accent);
  color: var(--accent-ink);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  transform: rotate(-6deg);
  flex-shrink: 0;
}

/* ---------- Header ---------- */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1.25rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

header nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-2);
}

header nav > a:not(.btn-nav) {
  display: none;
  padding: 0.25rem 0.5rem;
  text-decoration: none;
  transition: color 0.2s ease;
}

header nav > a:not(.btn-nav):hover {
  color: var(--text);
}

.btn-nav {
  margin-left: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-btn);
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease;
}

.btn-nav:hover {
  transform: scale(1.03);
}

.btn-nav:active {
  transform: scale(0.98);
}

/* Three-state theme selector, styled as a small segmented control */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: 0.5rem;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  background: var(--surface);
}

.theme-toggle button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 26px;
  border: 0;
  border-radius: 0.45rem;
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.theme-toggle button:hover {
  color: var(--text);
}

.theme-toggle button[aria-checked="true"] {
  background: color-mix(in oklch, var(--text) 9%, transparent);
  color: var(--text);
}

.theme-toggle svg {
  width: 15px;
  height: 15px;
}

@media (min-width: 640px) {
  header nav {
    gap: 1.25rem;
  }
  header nav > a:not(.btn-nav) {
    display: block;
  }
}

/* ---------- Hero ---------- */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3.5rem;
  padding-block: 2.5rem 6rem;
}

.hero-copy {
  max-width: 36rem;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-2);
}

.eyebrow::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px color-mix(in oklch, var(--accent) 70%, transparent);
}

.hero h1 {
  margin-top: 1.1rem;
  font-size: clamp(2.6rem, 6.5vw, 4.3rem);
  line-height: 1.04;
}

.hero-sub {
  margin-top: 1.5rem;
  max-width: 30rem;
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--text-2);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
  margin-top: 2.25rem;
}

.btn {
  display: inline-block;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-btn);
  background: var(--accent);
  color: var(--accent-ink);
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease;
}

.btn:hover {
  transform: scale(1.03);
}

.btn:active {
  transform: scale(0.98);
}

.btn-quiet {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-2);
  text-decoration: none;
  transition: color 0.2s ease;
}

.btn-quiet:hover {
  color: var(--text);
}

.hero-note {
  margin-top: 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-2);
}

/* Neon-marker highlight for the emphasized word — brighter on dark so it reads as lit pigment */
.hi {
  background: linear-gradient(
    to top,
    light-dark(
        color-mix(in oklch, var(--neon) 40%, transparent),
        color-mix(in oklch, var(--neon) 62%, transparent)
      )
      44%,
    transparent 44%
  );
  padding-inline: 0.04em;
}

@media (min-width: 960px) {
  .hero {
    flex-direction: row;
    align-items: center;
    gap: 2rem;
    padding-top: 4rem;
  }
  .hero-copy {
    flex: 1;
  }
  .hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
  }
}

/* ---------- Hero visual: the argon atom, lit like a discharge tube ---------- */
.atom {
  position: relative;
  width: 300px;
  height: 300px;
  display: grid;
  place-items: center;
}

.element-tile {
  position: relative;
  z-index: 2;
  width: 150px;
  height: 150px;
  border-radius: 24%;
  background: var(--dark);
  border: 1px solid color-mix(in oklch, var(--argon-bright) 45%, transparent);
  color: var(--dark-ink);
  padding: 14px 18px;
  transform: rotate(2deg);
  box-shadow:
    0 0 60px -10px color-mix(in oklch, var(--argon) 45%, transparent),
    0 24px 48px -24px color-mix(in oklch, var(--dark) 60%, transparent);
  animation: hover-float 7s ease-in-out infinite;
}

.element-tile .num {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 500;
  color: var(--dark-ink-2);
}

.element-tile .sym {
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: 600;
  line-height: 1;
  margin-top: 4px;
  color: var(--argon-bright);
  text-shadow:
    0 0 16px color-mix(in oklch, var(--argon-bright) 60%, transparent),
    0 0 44px color-mix(in oklch, var(--argon-bright) 35%, transparent);
}

.element-tile .name {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--dark-ink-2);
  margin-top: 9px;
}

@keyframes hover-float {
  0%,
  100% {
    transform: rotate(2deg) translateY(0);
  }
  50% {
    transform: rotate(2deg) translateY(-10px);
  }
}

.orbit {
  position: absolute;
  inset: 0;
  border: 1.5px dashed color-mix(in oklch, var(--text) 22%, transparent);
  border-radius: 50%;
  animation: spin 26s linear infinite;
}

.orbit-2 {
  inset: 38px;
  animation-duration: 18s;
  animation-direction: reverse;
}

.orbit .electron {
  position: absolute;
  top: -8px;
  left: 50%;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  margin-left: -7.5px;
}

.e-neon {
  background: var(--neon);
}

.e-xenon {
  background: var(--xenon);
}

.e-krypton {
  top: auto;
  bottom: -8px;
  background: var(--krypton);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ---------- Staggered rise-in on load ---------- */
.rise {
  opacity: 0;
  transform: translateY(14px);
  animation: rise 0.7s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  animation-delay: var(--rise-delay, 0ms);
}

@keyframes rise {
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .rise {
    animation: none;
    opacity: 1;
    transform: none;
  }
  .element-tile,
  .orbit {
    animation: none;
  }
  html {
    scroll-behavior: auto;
  }
}

/* ---------- Dark manifesto band: the lab at night ---------- */
.manifesto {
  background:
    radial-gradient(42rem 26rem at 12% 110%, color-mix(in oklch, var(--argon) 22%, transparent), transparent 70%),
    var(--dark);
  color: var(--dark-ink);
}

.manifesto .wrap {
  display: grid;
  gap: 2.5rem;
  padding-block: 5rem;
}

.manifesto h2 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  line-height: 1.12;
}

.glow {
  color: var(--argon-bright);
  text-shadow:
    0 0 18px color-mix(in oklch, var(--argon-bright) 55%, transparent),
    0 0 48px color-mix(in oklch, var(--argon-bright) 30%, transparent);
}

.manifesto p {
  margin-top: 1.5rem;
  max-width: 32rem;
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--dark-ink-2);
}

.manifesto ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.9rem;
}

.manifesto li {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 1.125rem;
  font-weight: 500;
}

.manifesto li .x {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.7rem;
  height: 1.7rem;
  flex-shrink: 0;
  border-radius: 0.5rem;
  background: var(--neon);
  color: var(--dark);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  transform: rotate(-6deg);
}

@media (min-width: 960px) {
  .manifesto .wrap {
    grid-template-columns: 1.2fr 1fr;
    gap: 5rem;
  }
}

/* ---------- Section scaffolding ---------- */
section.block {
  padding-block: 6rem 0;
}

section.block:last-of-type {
  padding-bottom: 7rem;
}

.section-title {
  font-size: clamp(1.875rem, 4vw, 2.3rem);
}

/* ---------- Process steps ---------- */
.steps {
  display: grid;
  gap: 2.5rem;
  margin-top: 3rem;
}

.step .n {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 600;
  color: var(--accent);
  opacity: 0.32;
}

.step h3 {
  margin-top: 0.75rem;
  font-size: 1.25rem;
}

.step p {
  margin-top: 0.75rem;
  color: var(--text-2);
}

@media (min-width: 640px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------- Capabilities: a periodic table of what we do ---------- */
.cards-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
}

.cards {
  display: grid;
  gap: 1.25rem;
  margin-top: 3rem;
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: var(--surface);
  padding: 1.6rem 1.75rem 1.75rem;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.card:hover {
  border-color: color-mix(in oklch, var(--card-tint, var(--accent)) 55%, var(--line));
  transform: translateY(-3px);
}

.card-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.card .sym {
  font-family: var(--font-display);
  font-size: 2.1rem;
  font-weight: 600;
  line-height: 1;
  color: var(--card-tint, var(--accent));
}

.card .anum {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-2);
}

.card h3 {
  margin-top: 1.1rem;
  font-size: 1.2rem;
}

.card p {
  margin-top: 0.6rem;
  color: var(--text-2);
}

/* Price line: sits between the title and the description, tinted like the symbol */
.card .price {
  margin-top: 0.35rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--card-tint, var(--accent));
}

.pricing-note {
  margin-top: 1.75rem;
  max-width: 38rem;
  font-size: 0.875rem;
  color: var(--text-2);
}

@media (min-width: 640px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .cards {
    grid-template-columns: repeat(3, 1fr);
  }
  .card.wide {
    grid-column: span 2;
  }
}

/* ---------- For established teams: contracting split ---------- */
.split {
  display: grid;
  gap: 3rem;
}

.split-copy {
  margin-top: 1.25rem;
  max-width: 34rem;
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--text-2);
}

.facts {
  list-style: none;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.9rem;
}

.facts li {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 1.125rem;
  font-weight: 500;
}

/* The affirmative twin of the manifesto's ✕ chip */
.facts .tick {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.7rem;
  height: 1.7rem;
  flex-shrink: 0;
  border-radius: 0.5rem;
  background: var(--krypton);
  color: var(--dark);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  transform: rotate(-6deg);
}

@media (min-width: 960px) {
  .split {
    grid-template-columns: 1.2fr 1fr;
    gap: 5rem;
    align-items: center;
  }
}

/* ---------- FAQ ---------- */
.faq {
  margin-top: 2.5rem;
  border-top: 1px solid var(--line);
}

.faq details {
  border-bottom: 1px solid var(--line);
}

.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.25rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  transition: color 0.2s ease;
}

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

.faq summary:hover {
  color: var(--accent);
}

.faq summary::after {
  content: "+";
  flex-shrink: 0;
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--text-2);
  line-height: 1;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.faq details[open] summary::after {
  transform: rotate(45deg);
}

.faq details p {
  padding-bottom: 1.4rem;
  max-width: 44rem;
  color: var(--text-2);
}

/* ---------- Final CTA: a lit sign ---------- */
.cta-block {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2rem;
  border-radius: 1.75rem;
  background:
    radial-gradient(34rem 20rem at 85% 120%, color-mix(in oklch, var(--argon) 30%, transparent), transparent 72%),
    var(--dark);
  border: 1px solid color-mix(in oklch, var(--argon-bright) 32%, transparent);
  color: var(--dark-ink);
  padding: 3.5rem 2rem;
}

.cta-block h2 {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  line-height: 1.12;
}

.cta-block p {
  margin-top: 0.75rem;
  max-width: 28rem;
  font-size: 1.125rem;
  color: var(--dark-ink-2);
}

.btn-lit {
  display: inline-block;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-btn);
  background: var(--argon-bright);
  color: var(--dark);
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 0 32px -4px color-mix(in oklch, var(--argon-bright) 55%, transparent);
  transition: transform 0.2s ease;
}

.btn-lit:hover {
  transform: scale(1.03);
}

.btn-lit:active {
  transform: scale(0.98);
}

@media (min-width: 640px) {
  .cta-block {
    padding: 3.5rem;
  }
}

@media (min-width: 960px) {
  .cta-block {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

/* ---------- Footer ---------- */
footer {
  margin-top: 7rem;
  border-top: 1px solid var(--line);
}

footer .wrap {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding-block: 3rem 1rem;
}

footer .tagline {
  margin-top: 0.75rem;
  max-width: 17rem;
  font-size: 0.875rem;
  color: var(--text-2);
}

footer nav {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  font-size: 0.875rem;
}

footer nav .label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-2);
  margin-bottom: 0.25rem;
}

footer nav a {
  color: var(--text-2);
  text-decoration: none;
  transition: color 0.2s ease;
}

footer nav a:hover {
  color: var(--text);
}

.copyright {
  padding-bottom: 2rem;
  font-size: 0.75rem;
  color: var(--text-2);
}

@media (min-width: 640px) {
  footer .wrap {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* ============================================================
   Secondary offerings — "also from Argon Labs"
   ------------------------------------------------------------
   Two full-bleed dark bands sitting back-to-back so the page
   reads light → dark region → light, rather than strobing.
   Each band carries its own accent in --band, which drives the
   entry rule, the eyebrow dot, the tile and the list ticks —
   so the two offerings are visibly siblings, not duplicates.
   Distinguished from .manifesto by where the light comes from:
   the manifesto glows from the bottom-left in argon blue, these
   are lit from the top-right in their own colour.
   ============================================================ */

.aside {
  --band: var(--argon-bright);
  /* In dark mode the page is already dark, so a --dark band disappears
     into it — the separation only worked in light mode. Darker than the
     page in light, a raised plateau in dark: distinct in both. The dark
     value sits above --surface so these read as further forward than
     the service cards. */
  --band-surface: light-dark(var(--dark), oklch(22.5% 0.026 var(--hue)));
  position: relative;
  background:
    radial-gradient(38rem 22rem at 88% -10%, color-mix(in oklch, var(--band) 16%, transparent), transparent 68%),
    var(--band-surface);
  color: var(--dark-ink);
}

/* Entry edge from the light section above, and the divider between
   the two bands — same rule doing both jobs. */
.aside::before {
  content: "";
  position: absolute;
  inset-inline: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(
    to right,
    color-mix(in oklch, var(--band) 55%, transparent),
    color-mix(in oklch, var(--band) 12%, transparent) 42%,
    transparent 78%
  );
}

.aside .wrap {
  padding-block: 5rem;
}

/* .block has no bottom padding, so without this the light section above
   ends flush against the colour change. */
.block + .aside {
  margin-top: 6rem;
}

.aside-apps {
  --band: var(--xenon);
}

.aside-teams {
  --band: var(--helium);
}

/* Header row: label left, element tile right — mirrors .cards-head. */
.aside-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 2.75rem;
}

.aside .eyebrow {
  color: var(--dark-ink-2);
}

.aside .eyebrow::before {
  background: var(--band);
  box-shadow: 0 0 10px color-mix(in oklch, var(--band) 75%, transparent);
}

/* Wordless element tile: symbol and index only, no chemistry. */
.aside-tile {
  flex-shrink: 0;
  display: grid;
  place-content: center;
  width: 62px;
  height: 62px;
  border-radius: 24%;
  border: 1px solid color-mix(in oklch, var(--band) 42%, transparent);
  background: color-mix(in oklch, var(--band) 9%, transparent);
  text-align: center;
  line-height: 1;
}

.aside-tile .sym {
  display: block;
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
  color: var(--band);
  text-shadow: 0 0 18px color-mix(in oklch, var(--band) 45%, transparent);
}

.aside h2 {
  color: var(--dark-ink);
  max-width: 30ch;
}

.aside .split-copy {
  color: var(--dark-ink-2);
}

.aside .facts li {
  color: var(--dark-ink);
}

.aside .facts .tick {
  background: var(--band);
}

/* The band CTA is quieter than a lit button — these are secondary
   offers and shouldn't outshout the $999 audit above them. */
.aside-cta {
  display: inline-block;
  margin-top: 2rem;
  padding: 0.8rem 1.5rem;
  border-radius: var(--radius-btn);
  border: 1px solid color-mix(in oklch, var(--band) 55%, transparent);
  color: var(--band);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition:
    background-color 0.2s ease,
    transform 0.2s ease;
}

.aside-cta:hover {
  background: color-mix(in oklch, var(--band) 14%, transparent);
}

.aside-cta:active {
  transform: scale(0.985);
}

@media (max-width: 520px) {
  .aside-head {
    margin-bottom: 2rem;
  }

  .aside-tile {
    width: 52px;
    height: 52px;
  }

  .aside-tile .sym {
    font-size: 21px;
  }
}


/* ============================================================
   Focus visibility
   ------------------------------------------------------------
   The site shipped with no focus styles, so keyboard users were
   relying on the UA default — which disappears against the dark
   bands. On dark surfaces the outline picks up that band's own
   accent via --band, falling back to the bright argon blue.
   ============================================================ */

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 3px;
}

.manifesto :focus-visible,
.aside :focus-visible,
.cta-block :focus-visible {
  outline-color: var(--band, var(--argon-bright));
}

@media (prefers-reduced-motion: reduce) {
  .btn,
  .btn-quiet,
  .btn-nav,
  .btn-lit,
  .aside-cta {
    transition: none;
  }

  .btn:active,
  .btn-lit:active,
  .btn-lit:hover,
  .aside-cta:active {
    transform: none;
  }
}