@charset "UTF-8";
/* ------------------------------------------------------------------------------- */
/* Cylch — typography-only, based on 'Sphere' by One Page Love (CC BY 3.0)         */
/* Headings: SF expanded · Body: SF                                                */
/* ------------------------------------------------------------------------------- */

:root {
  --bg: #1a1c20;
  --bg-alt: #27282a;
  --text: #fffff5;
  --muted: #919297;
  --subtle: #7b7d80;
  --line: #43454a;
  --accent: #00CBBF;
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro", "Helvetica Neue", "Segoe UI", sans-serif, "Apple Color Emoji";
  --font-display: "SF Pro Expanded", "SF Pro Display Expanded", -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", "Segoe UI", sans-serif;
}

/* ------------------------------------------------------------------------------- */
/* Reset */
/* ------------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  color-scheme: dark;
}
@media (max-width: 600px) {
  html {
    font-size: 14px;
  }
}

body {
  position: relative;
  font-family: var(--font-body);
  font-size: 100%;
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: -0.2px;
  min-height: 100vh;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  background-color: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

ul,
ol {
  list-style: none;
}

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

b, strong {
  font-weight: 600;
}

i, em {
  font-style: italic;
}

::selection {
  background: var(--accent);
  color: var(--bg);
  text-shadow: none;
}

*:focus {
  outline: 2px solid transparent;
  outline-offset: 2px;
}

/* ------------------------------------------------------------------------------- */
/* Display type — extra-wide SF for headings */
/* ------------------------------------------------------------------------------- */
h1, h2, .top__brand {
  font-family: var(--font-display);
  font-stretch: 150%;
  font-weight: 700;
}

.top__brand {
  text-transform: uppercase;
}

/* ------------------------------------------------------------------------------- */
/* Layout rhythm */
/* ------------------------------------------------------------------------------- */
.top,
section,
.site-footer {
  padding-top: 48px;
  padding-bottom: 48px;
}
@media (max-width: 600px) {
  .top,
  section,
  .site-footer {
    padding-top: 28px;
    padding-bottom: 28px;
  }
}

.top,
.eyebrow,
div.boxed,
.site-footer {
  width: 100%;
  max-width: 1020px;
  margin-left: auto;
  margin-right: auto;
}
@media (max-width: 1100px) {
  .top,
  .eyebrow,
  div.boxed,
  .site-footer {
    width: calc(100% - 80px);
  }
}
@media (max-width: 600px) {
  .top,
  .eyebrow,
  div.boxed,
  .site-footer {
    width: calc(100% - 48px);
  }
}

/* ------------------------------------------------------------------------------- */
/* Header */
/* ------------------------------------------------------------------------------- */
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.top__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.125rem;
  letter-spacing: 0.08em;
  color: var(--text);
}
.top__brand img {
  width: 22px;
  height: 22px;
  display: block;
}
.top__right {
  display: flex;
  align-items: center;
  gap: 24px;
}
@media (max-width: 600px) {
  .top__right {
    gap: 20px;
  }
}
.top .links {
  display: flex;
  align-items: center;
  gap: 40px;
}
.top__link {
  font-size: 1rem;
  color: var(--muted);
  transition: color 0.2s ease-in;
}
.top__link:hover {
  color: var(--accent);
  transition: color 0.1s ease-out;
}
.top__cta {
  padding: 4px 16px;
  border-radius: 999px;
  font-size: 1rem;
  display: inline-flex;
  background-color: #fbfbe5;
  color: var(--bg);
  transition: color 0.3s;
}
.top__cta {
  align-items: center;
}
.top__cta .apple-logo {
  width: 0.9em;
  height: 0.9em;
  margin-right: 0.45em;
  margin-top: -0.1em;
}
.top__cta .arrow {
  display: inline-block;
  transition: transform 0.3s ease;
  margin-left: 0.25em;
}
.top__cta:hover .arrow {
  transform: translateX(3px);
}
@media (max-width: 600px) {
  .top .links {
    display: none;
  }
  .top__cta {
    padding: 5px 12px;
    font-size: 0.78rem;
    white-space: nowrap;
    flex-shrink: 0;
  }
}

/* ------------------------------------------------------------------------------- */
/* Hero */
/* ------------------------------------------------------------------------------- */
.hero {
  padding-top: 72px;
  padding-bottom: 72px;
}
.hero .hero-sub {
  max-width: 640px;
}
@media (max-width: 600px) {
  .hero {
    padding-top: 40px;
    padding-bottom: 40px;
  }
}

.eyebrow {
  display: block;
  margin-bottom: 32px;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.25em;
  text-align: center;
  color: var(--muted);
}
@media (max-width: 600px) {
  .eyebrow {
    text-align: left;
  }
}

.hero-icon {
  display: block;
  width: 120px;
  height: 120px;
  margin: 0 auto 16px;
}
@media (max-width: 600px) {
  .hero-icon {
    margin-left: auto;
    margin-right: auto;
  }
}

.overview {
  font-size: clamp(2.6rem, 7.4vw, 6.4rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  text-align: center;
  text-wrap: balance;
  margin-bottom: 40px;
}
@media (max-width: 600px) {
  .overview {
    text-align: left;
  }
}

.hero-sub {
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  font-size: 1.25rem;
  line-height: 2rem;
  letter-spacing: -0.05rem;
  color: var(--muted);
}
@media (max-width: 600px) {
  .hero-sub {
    text-align: left;
    margin-left: 0;
  }
}

/* ------------------------------------------------------------------------------- */
/* Page sections */
/* ------------------------------------------------------------------------------- */
section {
  width: 100%;
  margin: 0;
}
section[id],
.kicker[id],
footer[id],
header[id] {
  scroll-margin-top: 32px;
}
section.bg-alt {
  background-color: rgba(255, 255, 245, 0.05);
}
section hr {
  border: none;
  height: 72px;
}
@media (max-width: 600px) {
  section hr {
    height: 40px;
  }
}

div.boxed .kicker,
div.boxed h2,
div.boxed p,
div.boxed blockquote,
div.boxed .spec-list {
  width: 100%;
  max-width: 1010px;
  margin-left: auto;
  margin-right: auto;
}

.kicker {
  display: block;
  margin-bottom: 20px;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.25em;
  color: var(--subtle);
}

div.boxed h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.6rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 40px;
}

div.boxed p {
  font-size: 1.25rem;
  letter-spacing: -0.05rem;
  line-height: 2rem;
  color: var(--muted);
  margin-bottom: 40px;
}
div.boxed p a {
  text-decoration: underline;
  transition: color 0.2s ease-in;
}
div.boxed p a:hover {
  color: var(--accent);
  transition: color 0.1s ease-out;
}

div.boxed blockquote {
  margin: 40px auto;
  padding: 0 20px;
  border-left: 1px solid var(--subtle);
}
div.boxed blockquote p {
  font-size: 1rem;
  line-height: 1.5rem;
  color: var(--subtle);
  margin-bottom: 0;
}

/* ------------------------------------------------------------------------------- */
/* Dials — faithful port of CircularKnob.swift (dark scheme, 140pt)                */
/* ------------------------------------------------------------------------------- */
.dials {
  display: flex;
  justify-content: space-between;
  gap: 60px;
  padding-left: 80px;
  padding-right: 80px;
  margin-bottom: 48px;
}

.knob {
  --size: 322px;
  --k: 2.3;
  --deg: 0deg;
  position: relative;
  flex: 0 0 var(--size);
  width: var(--size);
  height: var(--size);
  border-radius: 50%;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}
@media (max-width: 960px) {
  .dials {
    justify-content: center;
    gap: 44px;
    padding-left: 0;
    padding-right: 0;
  }
  .knob {
    --size: 210px;
    --k: 1.5;
  }
}
@media (max-width: 600px) {
  .dials {
    gap: 32px;
  }
  .knob {
    --size: 140px;
    --k: 1;
  }
}
@media (max-width: 360px) {
  .top {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
  .top__right,
  .top__cta {
    width: 100%;
  }
  .top__cta {
    justify-content: center;
  }
  .dials {
    gap: 24px;
  }
  .knob {
    --size: 120px;
    --k: 0.857;
  }
}

/* ambient light field under the dials, driven by them */
.dials {
  position: relative;
}
/* Rendered at half size and scaled 2x: the blur lives on the rotating disc,
   so its texture is rasterized once and rotation stays on the compositor. */
/* full-page background layer; the glow inside is anchored to the dials */
.glow-layer {
  position: absolute;
  inset: 0;
  overflow: clip;
  z-index: -1;
  pointer-events: none;
}
.dials__glow {
  position: absolute;
  left: 50%;
  top: 50vh;
  width: max(950px, 85vw);
  aspect-ratio: 1;
  transform: translate(-50%, -50%) scale(2);
  opacity: 0.33;
  mix-blend-mode: screen;
  -webkit-mask: radial-gradient(circle closest-side, #000 10%, rgba(0, 0, 0, 0.4) 45%, transparent 96%);
  mask: radial-gradient(circle closest-side, #000 10%, rgba(0, 0, 0, 0.4) 45%, transparent 96%);
  pointer-events: none;
  will-change: opacity;
}
.dials__glow i {
  position: absolute;
  inset: 0;
  display: block;
  border-radius: 50%;
  background: conic-gradient(#ff453a, #ffd60a, #30d158, #64d2ff, #0a84ff, #bf5af2, #ff453a);
  filter: blur(40px);
  will-change: transform;
}
.knob--brightness {
  --gauge: conic-gradient(#ff453a, #ffd60a, #30d158, #64d2ff, #0a84ff, #bf5af2, #ff453a);
}
.knob--speed {
  --gauge: var(--accent);
}

.knob > div {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

/* popover surface + drop shadows */
.knob::before {
  content: "";
  position: absolute;
  inset: calc(var(--k) * 2px);
  border-radius: 50%;
  background: rgba(38, 40, 44, 0.92);
  box-shadow:
    0 calc(var(--k) * 5px) calc(var(--k) * 8px) rgba(0, 0, 0, 0.38),
    0 calc(var(--k) * 1px) calc(var(--k) * 2px) rgba(0, 0, 0, 0.3),
    0 calc(var(--k) * -4px) calc(var(--k) * 6px) rgba(255, 255, 245, 0.12);
}

/* brushed angular sheen */
.knob__surface {
  inset: calc(var(--k) * 2px);
  background: conic-gradient(
    rgba(255, 255, 255, 0.035) 0%,
    rgba(0, 0, 0, 0.045) 12.5%,
    rgba(255, 255, 255, 0.035) 25%,
    rgba(0, 0, 0, 0.045) 37.5%,
    rgba(255, 255, 255, 0.035) 50%,
    rgba(0, 0, 0, 0.045) 62.5%,
    rgba(255, 255, 255, 0.035) 75%,
    rgba(0, 0, 0, 0.045) 87.5%,
    rgba(255, 255, 255, 0.035) 100%
  );
}

/* vertical sheen */
.knob__vsheen {
  inset: calc(var(--k) * 3px);
  background: linear-gradient(
    rgba(255, 255, 255, 0.16),
    transparent 46%,
    rgba(0, 0, 0, 0.3) 82%,
    rgba(255, 255, 255, 0.035)
  );
}

/* radial depth */
.knob__radial {
  inset: calc(var(--k) * 3px);
  background: radial-gradient(
    closest-side,
    rgba(255, 255, 255, 0.06),
    transparent 58%,
    rgba(0, 0, 0, 0.22)
  );
}

/* 1px rim stroke */
.knob__ring {
  inset: calc(var(--k) * 4px);
  background: linear-gradient(
    rgba(255, 255, 255, 0.14),
    transparent 46%,
    rgba(0, 0, 0, 0.24) 82%,
    rgba(255, 255, 255, 0.045)
  );
  -webkit-mask: radial-gradient(closest-side, transparent calc(100% - var(--k) * 1px), #000 calc(100% - var(--k) * 0.5px));
  mask: radial-gradient(closest-side, transparent calc(100% - var(--k) * 1px), #000 calc(100% - var(--k) * 0.5px));
}

/* 5px bezel stroke */
.knob__bezel {
  inset: calc(var(--k) * 3px);
  background: linear-gradient(
    rgba(255, 255, 255, 0.08),
    transparent 45%,
    rgba(0, 0, 0, 0.3) 82%,
    rgba(255, 255, 255, 0.035)
  );
  -webkit-mask: radial-gradient(closest-side, transparent calc(100% - var(--k) * 5px), #000 calc(100% - var(--k) * 4.5px));
  mask: radial-gradient(closest-side, transparent calc(100% - var(--k) * 5px), #000 calc(100% - var(--k) * 4.5px));
}

/* 20 tick marks, major every 5th */
.knob__ticks {
  inset: 0;
}
.knob__tick {
  position: absolute;
  left: 50%;
  top: 50%;
  width: calc(var(--k) * 1px);
  height: calc(var(--k) * 3px);
  margin: calc(var(--k) * -1.5px) 0 0 calc(var(--k) * -0.5px);
  border-radius: calc(var(--k) * 0.5px);
  background: rgba(255, 255, 255, 0.22);
  transform: rotate(var(--a)) translateY(calc(var(--k) * -56.5px));
}
.knob__tick--major {
  height: calc(var(--k) * 5px);
  margin-top: calc(var(--k) * -2.5px);
  background: rgba(255, 255, 255, 0.3);
  transform: rotate(var(--a)) translateY(calc(var(--k) * -55.5px));
}

/* track highlight (offset 1px) */
.knob__trackhl {
  inset: calc(var(--k) * 8px);
  transform: translateY(calc(var(--k) * 1px));
  background: linear-gradient(
    rgba(255, 255, 255, 0.03),
    rgba(255, 255, 255, 0.015) 60%,
    transparent
  );
  -webkit-mask: radial-gradient(closest-side, transparent calc(100% - var(--k) * 2px), #000 calc(100% - var(--k) * 1.5px));
  mask: radial-gradient(closest-side, transparent calc(100% - var(--k) * 2px), #000 calc(100% - var(--k) * 1.5px));
}

/* track */
.knob__track {
  inset: calc(var(--k) * 8px);
  border: calc(var(--k) * 2px) solid rgba(0, 0, 0, 0.24);
}

/* gauge arc: pie-mask to progress, inner ring-mask carries the gradient */
.knob__gauge {
  inset: calc(var(--k) * 8px);
  -webkit-mask: conic-gradient(#000 0 var(--deg), transparent var(--deg) 360deg);
  mask: conic-gradient(#000 0 var(--deg), transparent var(--deg) 360deg);
}
.knob__gauge::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--gauge);
  -webkit-mask: radial-gradient(closest-side, transparent calc(100% - var(--k) * 2px), #000 calc(100% - var(--k) * 1.5px));
  mask: radial-gradient(closest-side, transparent calc(100% - var(--k) * 2px), #000 calc(100% - var(--k) * 1.5px));
}
.knob__gauge {
  opacity: 0.5;
}
.knob__gauge--glow {
  filter: blur(calc(var(--k) * 4px));
  opacity: 0.42;
}
.knob--speed .knob__gauge:not(.knob__gauge--glow) {
  opacity: 1;
}
.knob__gauge--glow::before {
  -webkit-mask: radial-gradient(closest-side, transparent calc(100% - var(--k) * 3px), #000 calc(100% - var(--k) * 2.5px));
  mask: radial-gradient(closest-side, transparent calc(100% - var(--k) * 3px), #000 calc(100% - var(--k) * 2.5px));
}

/* pointer dot at 0.65 R */
.knob__pointer {
  left: 50%;
  top: 50%;
  width: calc(var(--k) * 5px);
  height: calc(var(--k) * 5px);
  margin: calc(var(--k) * -2.5px) 0 0 calc(var(--k) * -2.5px);
  background: var(--accent);
  box-shadow: 0 0 calc(var(--k) * 8px) rgba(0, 203, 191, 0.8);
  transform: rotate(var(--deg)) translateY(calc(var(--k) * -44.2px));
}

/* centre label */
.knob__label {
  inset: 0;
  border-radius: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-stretch: 150%;
  font-size: calc(var(--k) * 12px);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--accent);
  opacity: 1;
  text-shadow: 0 0 calc(var(--k) * 6px) rgba(0, 203, 191, 0.65);
}
.knob__num {
  min-width: calc(var(--k) * 24px);
  text-align: right;
}
.knob__label svg {
  width: calc(var(--k) * 13px);
  height: calc(var(--k) * 13px);
  margin-left: calc(var(--k) * 5px);
  filter: drop-shadow(0 0 calc(var(--k) * 4px) rgba(0, 203, 191, 0.72));
}

/* ------------------------------------------------------------------------------- */
/* Spec list */
/* ------------------------------------------------------------------------------- */
.spec-list {
  font-size: 1rem;
  line-height: 1.5rem;
}
.spec-list > div {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 0;
  border-bottom: 2px dotted var(--accent);
}
.spec-list > div:last-child {
  border-bottom: none;
}
.spec-list dt {
  color: var(--muted);
}
.spec-list dd {
  color: var(--text);
  text-align: right;
}

/* ------------------------------------------------------------------------------- */
/* Footer */
/* ------------------------------------------------------------------------------- */
.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 40px;
  padding-bottom: 40px;
  font-size: 1rem;
  flex-wrap: wrap;
  color: var(--muted);
}
.site-footer a {
  color: var(--muted);
  text-decoration: underline;
}

.footer-left,
.footer-right {
  margin: 0.5rem 0;
}
.footer-right {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
.site-footer .footer-right a {
  color: var(--text);
  text-decoration: none;
  transition: color 0.2s ease-in;
}
.site-footer .footer-right a::before {
  content: "→";
  display: inline-block;
  margin-right: 0.5rem;
  color: var(--accent);
  transition: transform 0.3s ease;
}
.site-footer .footer-right a:hover {
  color: var(--accent);
}
.site-footer .footer-right a:hover::before {
  transform: translateX(3px);
}