/* ============================================================
   Blackboids — design system
   Restrained palette, warm-tinted neutrals, type-led layout.
   ============================================================ */

:root {
  /* Color — OKLCH, cleaner near-white with the faintest warm cast. No accent.
     Greys run a touch dark so secondary text stays legible where a boid drifts
     behind a frosted panel. */
  --bone:        oklch(99%   0.003 70);
  --bone-warm:   oklch(97.5% 0.005 60);
  --bone-deep:   oklch(95%   0.007 55);
  --hairline:    oklch(85%   0.011 55);
  --mute:        oklch(38%   0.012 48);
  --quiet:       oklch(32%   0.013 46);
  --ink:         oklch(19%   0.013 44);
  --ink-deep:    oklch(13%   0.012 40);

  --surface:     var(--bone);
  --surface-alt: var(--bone-warm);
  --surface-3:   var(--bone-deep);

  /* Type — the system stack. On Apple platforms this resolves to SF Pro
     (Display + Text optical sizes), elsewhere to a clean neutral grotesque.
     No web fonts: instant paint, native rendering, no layout shift. */
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
               "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-text: -apple-system, BlinkMacSystemFont, "SF Pro Text",
               "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;

  /* Modular scale, ~1.3 */
  --t-xs:    0.8125rem; /* 13 */
  --t-sm:    0.875rem;  /* 14 */
  --t-base:  1.0625rem; /* 17 — SF Pro body size */
  --t-lg:    1.1875rem; /* 19 */
  --t-xl:    clamp(1.3rem, 0.95rem + 1.2vw, 1.6rem);
  --t-2xl:   clamp(1.7rem, 1.1rem + 2.3vw, 2.4rem);
  --t-3xl:   clamp(2.3rem, 1.3rem + 4.2vw, 3.9rem);
  --t-4xl:   clamp(2.9rem, 1.4rem + 6.2vw, 5.6rem);

  /* 4pt spacing */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 24px;
  --s-6: 32px;
  --s-7: 48px;
  --s-8: 64px;
  --s-9: 96px;
  --s-10: 128px;

  /* Section padding (fluid) — generous, Apple-style breathing room. */
  --section-y: clamp(80px, 7vw + 28px, 176px);

  /* Grid */
  --bound-w: 1240px;
  --gutter:  clamp(22px, 4vw, 64px);

  /* Motion */
  --ease-out-quart: cubic-bezier(0.165, 0.84, 0.44, 1);
  --ease-out-quint: cubic-bezier(0.23, 1, 0.32, 1);
}

/* ============================================================
   Reset & base
   ============================================================ */

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

[hidden] { display: none !important; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: var(--t-base);
  line-height: 1.5;
  font-weight: 400;
  font-kerning: normal;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  position: relative;
}

/* The page backdrop — a soft iridescent gradient, fixed to the viewport. This
   is the thing the frosted panels refract. Three muted radial blooms (cool
   blue, soft pink, warm cream) over the near-white base. */
.backdrop {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(62vw 58vw at 8% 4%,   oklch(85% 0.105 252), transparent 70%),
    radial-gradient(58vw 56vw at 94% 0%,  oklch(88% 0.090 330), transparent 70%),
    radial-gradient(72vw 66vw at 38% 100%, oklch(89% 0.080 96), transparent 72%),
    var(--surface);
}

/* The flock — a light, drifting spray of tiny triangles, on top of the
   gradient. Faint, but visible. */
.boids-bg {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: 0.7;
}

.site-header,
main,
.site-footer { position: relative; z-index: 1; }

/* Frosted panels. The translucency is plain background alpha — works in every
   browser, unaffected by "Reduce transparency". The blur is deliberately light
   (5px) so the boids stay readable through the glass; saturate(80%) slightly
   mutes the gradient behind it. */
.glass {
  position: relative;
  background: color-mix(in oklch, var(--surface) 20%, transparent);
  backdrop-filter: blur(5px) saturate(80%);
  -webkit-backdrop-filter: blur(5px) saturate(80%);
  border: 1px solid oklch(99.5% 0.002 70 / 0.55);
  border-radius: 18px;
  padding: clamp(26px, 1.6vw + 18px, 48px);
  box-shadow:
    inset 0 1px 0 oklch(99.6% 0.002 70 / 0.7),
    0 10px 34px -18px color-mix(in oklch, var(--ink) 18%, transparent);
}

img, svg, canvas { display: block; max-width: 100%; }

button { font: inherit; color: inherit; }

a {
  color: inherit;
  text-decoration: none;
}

::selection { background: var(--ink); color: var(--surface); }

/* Visible focus, ink-on-bone */
:where(a, button, input, textarea, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
  border-radius: 1px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--surface);
  padding: var(--s-2) var(--s-4);
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  z-index: 100;
}
.skip:focus {
  left: var(--s-3);
  top: var(--s-3);
}

/* ============================================================
   Layout primitives
   ============================================================ */

.bound {
  width: 100%;
  max-width: var(--bound-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-5);
}

/* ============================================================
   Type primitives
   ============================================================ */

.display {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--t-3xl);
  line-height: 1.05;
  letter-spacing: -0.024em;
  color: var(--ink-deep);
  text-wrap: balance;
  margin: 0;
}

.lede {
  font-family: var(--font-text);
  font-size: var(--t-lg);
  line-height: 1.5;
  color: var(--quiet);
  max-width: 56ch;
  margin: 0;
  text-wrap: pretty;
}

.eyebrow,
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  font-weight: 590;
  letter-spacing: -0.003em;
  color: var(--mute);
  margin: 0;
}

.section-eyebrow::before {
  content: "";
  width: 20px;
  height: 1px;
  background: currentColor;
  opacity: 0.55;
  display: inline-block;
}

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

.inline-link {
  text-decoration: underline;
  text-decoration-color: color-mix(in oklch, currentColor 35%, transparent);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
  transition: text-decoration-color 200ms var(--ease-out-quart);
}
.inline-link:hover,
.inline-link:focus-visible {
  text-decoration-color: currentColor;
}

/* ============================================================
   Header
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  padding-block: var(--s-4);
  background: color-mix(in oklch, var(--surface) 72%, transparent);
  backdrop-filter: blur(5px) saturate(80%);
  -webkit-backdrop-filter: blur(5px) saturate(80%);
  border-bottom: 1px solid transparent;
  transition: border-color 220ms var(--ease-out-quart),
              background-color 220ms var(--ease-out-quart);
}

.site-header[data-scrolled="true"] {
  border-bottom-color: color-mix(in oklch, var(--hairline) 75%, transparent);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  font-weight: 590;
  letter-spacing: -0.005em;
  color: var(--ink-deep);
}

.wordmark-mark {
  display: inline-flex;
  width: 22px;
  height: 22px;
  align-items: center;
  justify-content: center;
  color: var(--ink-deep);
}

.nav-link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  color: var(--ink-deep);
  padding: var(--s-2) 2px;
  position: relative;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 2px;
  right: 14px;
  bottom: 4px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 320ms var(--ease-out-quart);
}
.nav-link:hover::after,
.nav-link:focus-visible::after { transform: scaleX(1); }
.nav-arrow {
  display: inline-block;
  transition: transform 320ms var(--ease-out-quart);
}
.nav-link:hover .nav-arrow { transform: translate(2px, -2px); }

/* ============================================================
   Hero
   ============================================================ */

.hero {
  min-height: clamp(560px, 86vh, 880px);
  padding-top: clamp(48px, 5vw + 16px, 112px);
  padding-bottom: var(--section-y);
  display: flex;
  align-items: center;
  position: relative;
}

.hero > .bound { width: 100%; }

.hero-text {
  display: flex;
  flex-direction: column;
  gap: var(--s-5);
  max-width: min(52ch, 100%);
}

.hero-text .display {
  font-size: var(--t-4xl);
  line-height: 1.0;
  letter-spacing: -0.03em;
}

.hero-text .lede {
  max-width: 40ch;
}

.hero-cta {
  margin-top: var(--s-4);
}

.hero-meta {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--s-1) var(--s-2);
  margin-top: var(--s-6);
  font-family: var(--font-text);
  font-size: var(--t-xs);
  color: var(--mute);
}
.hero-meta .meta-val {
  color: var(--quiet);
  font-variant-numeric: tabular-nums;
}
.hero-meta .meta-sep { color: var(--hairline); }
.hero-meta::before {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--hairline);
  align-self: center;
  margin-right: var(--s-2);
}

.anchor {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: var(--t-base);
  font-weight: 500;
  letter-spacing: -0.005em;
  color: var(--ink-deep);
  padding: 10px 2px;
  position: relative;
}
.anchor::after {
  content: "";
  position: absolute;
  left: 2px;
  right: 18px;
  bottom: 6px;
  height: 1.5px;
  border-radius: 1px;
  background: var(--ink-deep);
  transform: scaleX(1);
  transform-origin: left center;
  transition: transform 360ms var(--ease-out-quart);
}
.anchor:hover .anchor-arrow,
.anchor:focus-visible .anchor-arrow { transform: translateX(3px); }
.anchor-arrow { transition: transform 360ms var(--ease-out-quart); }

/* ============================================================
   Services
   ============================================================ */

.services {
  padding-block: var(--section-y);
  border-top: 1px solid var(--hairline);
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-7);
}

@media (min-width: 720px) {
  .services-grid {
    grid-template-columns: 8rem 1fr 1fr;
    column-gap: clamp(40px, 5vw, 96px);
    row-gap: var(--s-7);
    align-items: start;
  }

  .services-grid > .section-eyebrow {
    grid-column: 1;
    grid-row: 1;
    margin-top: 8px;
  }

  .services-grid > .service:nth-of-type(1) {
    grid-column: 2;
    grid-row: 1;
  }

  .services-grid > .service:nth-of-type(2) {
    grid-column: 3;
    grid-row: 1;
  }
}

.service {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  max-width: 42ch;
}

.service-index {
  font-family: var(--font-sans);
  font-size: var(--t-xs);
  font-weight: 590;
  letter-spacing: -0.003em;
  color: var(--mute);
  margin: 0;
}

.service-title {
  font-family: var(--font-sans);
  font-size: var(--t-2xl);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.022em;
  color: var(--ink-deep);
  margin: 0 0 var(--s-2);
  text-wrap: balance;
}

.service-body {
  font-family: var(--font-text);
  color: var(--quiet);
  max-width: 38ch;
}

.service-meta {
  display: flex;
  align-items: baseline;
  gap: var(--s-2);
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  color: var(--ink-deep);
  margin-top: var(--s-2);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ink-deep);
  display: inline-block;
  align-self: center;
  position: relative;
}
.status-dot::after {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 1px solid currentColor;
  opacity: 0.3;
}

/* ============================================================
   Principles
   ============================================================ */

.principles {
  padding-block: var(--section-y);
  border-top: 1px solid var(--hairline);
  background: color-mix(in oklch, var(--surface-alt) 22%, transparent);
  backdrop-filter: blur(5px) saturate(80%);
  -webkit-backdrop-filter: blur(5px) saturate(80%);
}

.principles .section-eyebrow {
  margin-bottom: var(--s-7);
}

.principles-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.principles-list li {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: var(--s-4);
  align-items: baseline;
  padding-block: var(--s-5);
  border-top: 1px solid var(--hairline);
}

.principles-list li:last-child {
  border-bottom: 1px solid var(--hairline);
}

.principles-list li p {
  margin: 0;
  font-family: var(--font-text);
  font-size: var(--t-lg);
  line-height: 1.5;
  color: var(--quiet);
  max-width: 52ch;
  text-wrap: pretty;
}
.principles-list li p strong {
  color: var(--ink-deep);
  font-weight: 590;
}

.principle-num {
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  font-weight: 590;
  letter-spacing: -0.003em;
  color: var(--mute);
  align-self: start;
  padding-top: 7px;
}

@media (min-width: 720px) {
  .principles-list li {
    grid-template-columns: 96px minmax(0, 1fr) 1fr;
  }
  .principles-list li p { padding-right: var(--s-7); }
}

/* ============================================================
   Talk / form
   ============================================================ */

.talk {
  padding-block: var(--section-y);
  border-top: 1px solid var(--hairline);
}

.talk-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-7);
}

@media (min-width: 880px) {
  .talk-grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: clamp(48px, 6vw, 120px);
    align-items: start;
  }
}

.talk-text { display: flex; flex-direction: column; gap: var(--s-4); }
.talk-heading {
  font-size: var(--t-3xl);
  line-height: 1.05;
  letter-spacing: -0.026em;
}

.form-shell {
  position: relative;
  display: flex;
  flex-direction: column;
}

.form {
  display: flex;
  flex-direction: column;
  gap: var(--s-5);
  margin: 0;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-5);
}

@media (min-width: 560px) {
  .form-row { grid-template-columns: 1fr 1fr; gap: var(--s-4); }
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
}

.field-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--font-sans);
  font-size: var(--t-sm);
  font-weight: 500;
  letter-spacing: -0.005em;
  color: var(--quiet);
}
.field-optional {
  font-weight: 400;
  font-size: var(--t-xs);
  color: var(--mute);
}

.field input,
.field textarea {
  appearance: none;
  font: inherit;
  font-family: var(--font-text);
  font-size: var(--t-base);
  line-height: 1.45;
  color: var(--ink-deep);
  background: color-mix(in oklch, var(--surface) 55%, transparent);
  border: 1px solid color-mix(in oklch, var(--hairline) 80%, transparent);
  border-radius: 12px;
  padding: 12px 14px;
  width: 100%;
  resize: none;
  transition: border-color 200ms var(--ease-out-quart),
              background-color 200ms var(--ease-out-quart),
              box-shadow 200ms var(--ease-out-quart);
}

.field textarea {
  min-height: 8.5em;
  resize: vertical;
}

.field input::placeholder,
.field textarea::placeholder {
  color: var(--mute);
}

.field input:hover,
.field textarea:hover {
  border-color: color-mix(in oklch, var(--ink) 22%, transparent);
}
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--ink-deep);
  background: color-mix(in oklch, var(--surface) 78%, transparent);
}
.field input:focus-visible,
.field textarea:focus-visible {
  border-color: var(--ink-deep);
  box-shadow: 0 0 0 3px color-mix(in oklch, var(--ink) 14%, transparent);
}

.field[data-invalid="true"] input,
.field[data-invalid="true"] textarea {
  border-color: var(--ink-deep);
  box-shadow: 0 0 0 3px color-mix(in oklch, var(--ink) 9%, transparent);
}

.field-error {
  display: block;
  font-family: var(--font-text);
  font-size: var(--t-sm);
  color: var(--ink-deep);
  margin-top: 2px;
}
.field-error::before {
  content: "× ";
  font-weight: 590;
}

/* Honeypot — hidden from real users, visible to dumb bots */
.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
  padding-top: var(--s-3);
}

.btn {
  appearance: none;
  cursor: pointer;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  background: var(--ink-deep);
  color: var(--surface);
  border: 0;
  padding: 13px 26px;
  font-family: var(--font-sans);
  font-size: var(--t-base);
  font-weight: 500;
  letter-spacing: -0.005em;
  border-radius: 999px;
  position: relative;
  transition: transform 220ms var(--ease-out-quart),
              background-color 220ms var(--ease-out-quart);
}
.btn:hover { background: var(--ink); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn[disabled] { opacity: 0.5; cursor: progress; transform: none; }
.btn-arrow { transition: transform 320ms var(--ease-out-quart); }
.btn:hover .btn-arrow,
.btn:focus-visible .btn-arrow { transform: translateX(3px); }

.form-status {
  font-family: var(--font-text);
  font-size: var(--t-sm);
  color: var(--quiet);
  margin: 0;
  text-align: right;
  flex: 1 1 auto;
}
.form-status[data-tone="error"] { color: var(--ink-deep); }

.form-success {
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  padding-block: var(--s-3);
  animation: success-in 520ms var(--ease-out-quart) both;
}
.form-success::before {
  content: "";
  width: 32px;
  height: 1px;
  background: var(--ink-deep);
  margin-bottom: var(--s-3);
}
@keyframes success-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   Footer
   ============================================================ */

.site-footer {
  padding-block: var(--s-7) var(--s-5);
  border-top: 1px solid var(--hairline);
}

.foot-line {
  display: inline-flex;
  align-items: baseline;
  gap: var(--s-2);
  font-family: var(--font-text);
  font-size: var(--t-sm);
  color: var(--mute);
  margin: 0;
  flex-wrap: wrap;
}

.foot-mark {
  color: var(--quiet);
  font-weight: 500;
}
.foot-sep { color: var(--hairline); }

/* ============================================================
   Flock controls — live tuning panel for the background boids.
   A small instrument panel, bottom-right. Monospace, terse: reads
   as a tool laid over the page, not part of the page.
   ============================================================ */

.boids-ui {
  position: fixed;
  right: clamp(12px, 2vw, 24px);
  bottom: clamp(12px, 2vw, 24px);
  z-index: 40;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--s-2);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  pointer-events: none;
}
.boids-ui > * { pointer-events: auto; }

.boids-ui-toggle {
  appearance: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  background: color-mix(in oklch, var(--surface) 78%, transparent);
  backdrop-filter: blur(6px) saturate(80%);
  -webkit-backdrop-filter: blur(6px) saturate(80%);
  border: 1px solid color-mix(in oklch, var(--hairline) 88%, transparent);
  border-radius: 999px;
  padding: 7px 14px 7px 11px;
  font-family: inherit;
  font-size: 12px;
  line-height: 1;
  color: var(--quiet);
  box-shadow: 0 6px 22px -14px color-mix(in oklch, var(--ink) 32%, transparent);
  transition: color 200ms var(--ease-out-quart),
              border-color 200ms var(--ease-out-quart),
              transform 200ms var(--ease-out-quart);
}
.boids-ui-toggle:hover {
  color: var(--ink-deep);
  border-color: color-mix(in oklch, var(--ink) 26%, transparent);
  transform: translateY(-1px);
}
.boids-ui-toggle[aria-expanded="true"] { color: var(--ink-deep); }
.boids-ui-glyph { width: 14px; height: 14px; flex: none; }

.boids-ui-panel {
  /* .glass supplies background/blur/border/shadow */
  width: min(280px, calc(100vw - 24px));
  padding: var(--s-4);
  border-radius: 14px;
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  animation: boids-ui-in 280ms var(--ease-out-quart) both;
}
@keyframes boids-ui-in {
  from { opacity: 0; transform: translateY(8px) scale(0.985); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.boids-ui-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--s-2);
  border-bottom: 1px solid color-mix(in oklch, var(--hairline) 72%, transparent);
}
.boids-ui-title {
  font-size: 11px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--mute);
}
.boids-ui-close {
  appearance: none;
  cursor: pointer;
  background: none;
  border: 0;
  font-family: inherit;
  font-size: 17px;
  line-height: 1;
  color: var(--mute);
  padding: 1px 5px 3px;
  border-radius: 5px;
  transition: color 160ms var(--ease-out-quart);
}
.boids-ui-close:hover { color: var(--ink-deep); }

.boids-ui-rows {
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.boids-ui-row {
  display: grid;
  grid-template-columns: 4.6em 1fr 3.2em;
  align-items: center;
  gap: var(--s-2);
}
.boids-ui-name {
  font-size: 11px;
  color: var(--quiet);
  cursor: pointer;
}
.boids-ui-val {
  font-size: 11px;
  color: var(--ink-deep);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.boids-ui-row input[type="range"] {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  height: 14px;
  margin: 0;
  background: transparent;
  cursor: pointer;
}
.boids-ui-row input[type="range"]:focus-visible { outline: none; }
.boids-ui-row input[type="range"]::-webkit-slider-runnable-track {
  height: 2px;
  border-radius: 1px;
  background: color-mix(in oklch, var(--ink) 24%, transparent);
}
.boids-ui-row input[type="range"]::-moz-range-track {
  height: 2px;
  border-radius: 1px;
  background: color-mix(in oklch, var(--ink) 24%, transparent);
}
.boids-ui-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 11px;
  height: 11px;
  margin-top: -6px;
  border-radius: 50%;
  background: var(--ink-deep);
  border: 2px solid var(--surface);
  box-shadow: 0 1px 4px -1px color-mix(in oklch, var(--ink) 45%, transparent);
}
.boids-ui-row input[type="range"]::-moz-range-thumb {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink-deep);
  border: 2px solid var(--surface);
  box-shadow: 0 1px 4px -1px color-mix(in oklch, var(--ink) 45%, transparent);
}
.boids-ui-row input[type="range"]:focus-visible::-webkit-slider-thumb {
  box-shadow: 0 0 0 2px var(--surface), 0 0 0 4px var(--ink-deep);
}
.boids-ui-row input[type="range"]:focus-visible::-moz-range-thumb {
  box-shadow: 0 0 0 2px var(--surface), 0 0 0 4px var(--ink-deep);
}

.boids-ui-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--s-2);
  border-top: 1px solid color-mix(in oklch, var(--hairline) 72%, transparent);
}
.boids-ui-reset {
  appearance: none;
  cursor: pointer;
  background: none;
  border: 0;
  font-family: inherit;
  font-size: 11px;
  color: var(--mute);
  padding: 3px 2px;
  text-decoration: underline;
  text-decoration-color: color-mix(in oklch, currentColor 32%, transparent);
  text-underline-offset: 0.2em;
  transition: color 160ms var(--ease-out-quart),
              text-decoration-color 160ms var(--ease-out-quart);
}
.boids-ui-reset:hover {
  color: var(--ink-deep);
  text-decoration-color: currentColor;
}
.boids-ui-note {
  font-size: 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--mute);
}

/* ============================================================
   Reduced motion
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}