/* ==========================================================================
   William Nayar: instrumentation design system
   Hand-built. No CSS framework. Dark-first, with a tuned light theme.
   ========================================================================== */

/* --- Tokens --------------------------------------------------------------- */

:root {
  --font-sans: "Plus Jakarta Sans", ui-sans-serif, system-ui, -apple-system, sans-serif;
  /* Emoji fallbacks matter: the replayed Airlock verdict contains emoji, and
     without these a font-less system renders them as tofu boxes. */
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", "Cascadia Code", monospace,
    "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji";

  /* Palette taken from the banner on my GitHub profile: deep navy surfaces,
     GitHub blue as the accent, purple as the secondary. Every value below is
     measured against --bg rather than eyeballed. */
  --bg: #0a1018;
  --bg-deep: #070c12;
  --surface: #0c1320;
  --surface-2: #111b2e;
  --surface-3: #16233a;
  --border: #2b3d54;        /* 1.73:1, a card edge you can actually see */
  --border-strong: #46617f; /* 2.98:1 for controls and dividers */

  --text: #edf3fc;      /* 17.11:1 */
  --text-2: #aec9ee;    /* 11.26:1, body copy */
  --muted: #93a9c0;     /*  7.89:1, secondary */
  --faint: #7f93aa;     /*  6.05:1, labels; still clears AA */

  --accent: #4493f8;        /* GitHub blue, straight from the banner */
  --accent-bright: #79b8ff;
  --accent-deep: #1f6feb;
  --violet: #a371f7;        /* the banner's secondary */
  --amber: #d29922;
  --amber-deep: #9e6a03;
  --red: #f85149;
  --blue: #79b8ff;
  --green: #3fb950;

  --glow-accent: rgba(68, 147, 248, 0.35);
  --wash-accent: rgba(68, 147, 248, 0.1);
  --wash-amber: rgba(210, 153, 34, 0.12);
  --wash-red: rgba(248, 81, 73, 0.1);

  --grid-line: rgba(174, 201, 238, 0.05);

  /* --- Type scale -------------------------------------------------------
     Few, clearly separated steps. The previous system had five sizes packed
     between 12 and 15.2px, which reads as uniformly small rather than as a
     hierarchy. Leading tightens as size grows, and loosens as measure grows. */
  --fs-display: clamp(2.6rem, 6vw, 4rem);
  --fs-h1: clamp(1.95rem, 3.8vw, 2.7rem);
  --fs-h2: clamp(1.45rem, 2.5vw, 1.85rem);
  --fs-h3: 1.2rem;
  --fs-lede: clamp(1.09rem, 1.4vw, 1.2rem);
  --fs-body: 1.0625rem;
  --fs-sm: 0.95rem;
  --fs-xs: 0.82rem;
  --fs-micro: 0.72rem;

  --lh-display: 1.04;
  --lh-h1: 1.12;
  --lh-h2: 1.22;
  --lh-h3: 1.35;
  --lh-lede: 1.58;
  --lh-body: 1.68;
  --lh-sm: 1.65;
  --lh-mono: 1.7;

  /* --- Measure ----------------------------------------------------------
     Body text past ~75 characters makes the eye lose the line on the return
     sweep. Expressed in em, not ch: Plus Jakarta Sans has an unusually wide
     zero glyph (1ch = 0.71em), so a 68ch cap actually renders ~96 characters.
     An average character is ~0.5em, so 34em lands near the 66 ideal. */
  --measure: 34em;
  --measure-tight: 29em;
  --measure-wide: 38em;

  /* --- Spacing ----------------------------------------------------------
     Non-linear so adjacent steps are visibly different. Proximity does the
     grouping: related things sit at s-3/s-4, unrelated at s-7 and up. */
  --s-1: 0.25rem;
  --s-2: 0.5rem;
  --s-3: 0.75rem;
  --s-4: 1rem;
  --s-5: 1.5rem;
  --s-6: 2rem;
  --s-7: 3rem;
  --s-8: 4rem;
  --s-9: 5.5rem;
  --s-10: 7rem;

  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 22px;

  --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-2: 0 12px 32px -8px rgba(0, 0, 0, 0.6);
  --shadow-3: 0 28px 64px -16px rgba(0, 0, 0, 0.7);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);

  --container: 1140px;
  --gutter: clamp(1.15rem, 4vw, 2.5rem);
  --nav-h: 62px;

  color-scheme: dark;
}

[data-theme="light"] {
  /* GitHub's light palette, so the two themes are siblings. */
  --bg: #ffffff;
  --bg-deep: #f6f8fa;
  --surface: #ffffff;
  --surface-2: #f6f8fa;
  --surface-3: #eaeef2;
  --border: #d1d9e0;
  --border-strong: #9aa5b1;

  --text: #1f2328;
  --text-2: #424a53;
  --muted: #59636e;
  --faint: #6e7781;

  --accent: #0969da;
  --accent-bright: #0550ae;
  --accent-deep: #0550ae;
  --violet: #8250df;
  --amber: #9a6700;
  --amber-deep: #7d4e00;
  --red: #cf222e;
  --blue: #0969da;
  --green: #1a7f37;

  --glow-accent: rgba(9, 105, 218, 0.22);
  --wash-accent: rgba(9, 105, 218, 0.07);
  --wash-amber: rgba(154, 103, 0, 0.08);
  --wash-red: rgba(207, 34, 46, 0.07);

  --grid-line: rgba(31, 35, 40, 0.05);

  --shadow-1: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-2: 0 12px 28px -10px rgba(15, 23, 42, 0.16);
  --shadow-3: 0 26px 56px -20px rgba(15, 23, 42, 0.2);

  color-scheme: light;
}

/* --- Reset ---------------------------------------------------------------- */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 1rem);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color 0.35s var(--ease), color 0.35s var(--ease);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  line-height: var(--lh-h3);
  letter-spacing: -0.028em;
  font-weight: 700;
  text-wrap: balance;
}

/* Prose blocks cap their own measure, so a wide container never produces a
   wide line. Applied at the element rather than the container, because the
   containers here are also holding full-width diagrams. */
p,
li {
  text-wrap: pretty;
}

p {
  margin: 0 0 var(--s-4);
  max-width: var(--measure);
}

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

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

a:hover {
  color: var(--accent-bright);
}

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

code,
kbd {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

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

::selection {
  background: var(--glow-accent);
  color: var(--text);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 200;
  padding: 0.65rem 1.1rem;
  background: var(--accent);
  color: #ffffff;
  border-radius: var(--r-sm);
  font-weight: 600;
}

.skip-link:focus {
  top: 0.75rem;
}

/* --- Layout --------------------------------------------------------------- */

.wrap {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.wrap--narrow {
  max-width: 800px;
}

.section {
  padding-block: clamp(3rem, 6vw, 5rem);
  position: relative;
}

.section--tight {
  padding-block: clamp(2rem, 4vw, 3rem);
}

/* Stacks a section's own children on the spacing scale, so rhythm comes from
   one rule rather than from per-element margins that drift apart. */
.stack > * + * {
  margin-top: var(--s-5);
}

.stack--tight > * + * {
  margin-top: var(--s-3);
}

.stack--loose > * + * {
  margin-top: var(--s-7);
}

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: linear-gradient(90deg, transparent, var(--border) 15%, var(--border) 85%, transparent);
}

/* --- Nav ------------------------------------------------------------------ */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px) saturate(150%);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background-color 0.3s var(--ease);
}

.nav.is-stuck {
  border-bottom-color: var(--border);
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 0.97rem;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-right: auto;
}

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

.nav__mark {
  width: 26px;
  height: 26px;
  flex: none;
}

.nav__mark-ring {
  transform-origin: 50% 50%;
  animation: spin 9s linear infinite;
}

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

.nav__link {
  position: relative;
  padding: 0.4rem 0.75rem;
  border-radius: var(--r-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-2);
}

.nav__link:hover {
  color: var(--text);
  background: var(--surface-2);
}

.nav__link.is-active {
  color: var(--accent);
}

.nav__link.is-active::after {
  content: "";
  position: absolute;
  left: 0.75rem;
  right: 0.75rem;
  bottom: 0.05rem;
  height: 1.5px;
  border-radius: 2px;
  background: var(--accent);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--surface);
  color: var(--text-2);
  transition: all 0.2s var(--ease);
}

.icon-btn:hover {
  color: var(--accent);
  border-color: var(--accent-deep);
  background: var(--surface-2);
}

.icon-btn svg {
  width: 16px;
  height: 16px;
}

.theme-toggle [data-icon="sun"] {
  display: none;
}

[data-theme="light"] .theme-toggle [data-icon="sun"] {
  display: block;
}

[data-theme="light"] .theme-toggle [data-icon="moon"] {
  display: none;
}

.nav__burger {
  display: none;
}

@media (max-width: 760px) {
  .nav__burger {
    display: inline-flex;
  }

  .nav__links {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0.15rem;
    padding: 0.75rem var(--gutter) 1.1rem;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-2);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.25s var(--ease);
  }

  .nav__links.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav__link {
    padding: 0.7rem 0.75rem;
    font-size: 1rem;
  }
}

/* --- Type helpers --------------------------------------------------------- */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--s-3);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--accent);
  opacity: 0.7;
}

.h-display {
  font-size: var(--fs-display);
  line-height: var(--lh-display);
  letter-spacing: -0.042em;
  max-width: 16ch;
}

.h1 {
  font-size: var(--fs-h1);
  line-height: var(--lh-h1);
  letter-spacing: -0.035em;
  max-width: 22ch;
}

.h2 {
  font-size: var(--fs-h2);
  line-height: var(--lh-h2);
  letter-spacing: -0.03em;
  max-width: 26ch;
}

.h3 {
  font-size: var(--fs-h3);
  line-height: var(--lh-h3);
  letter-spacing: -0.02em;
}

.lede {
  font-size: var(--fs-lede);
  line-height: var(--lh-lede);
  color: var(--text-2);
  max-width: var(--measure);
}

.muted {
  color: var(--muted);
}

.mono {
  font-family: var(--font-mono);
}

.accent {
  color: var(--accent);
}

/* Heading sits close to the text it introduces (proximity), while the whole
   block sits far from what precedes it. */
.section-head {
  max-width: var(--measure);
  margin-bottom: var(--s-7);
}

.section-head p {
  margin-top: var(--s-4);
  margin-bottom: 0;
}

/* --- Status chips --------------------------------------------------------- */

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--surface-2);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-2);
  white-space: nowrap;
}

.chip__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  flex: none;
}

.chip--shipped {
  color: var(--green);
  border-color: color-mix(in srgb, var(--green) 40%, transparent);
  background: color-mix(in srgb, var(--green) 9%, transparent);
}

.chip--shipped .chip__dot {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--green) 20%, transparent);
  animation: pulse-dot 2.6s var(--ease-in-out) infinite;
}

.chip--building {
  color: var(--amber);
  border-color: color-mix(in srgb, var(--amber) 40%, transparent);
  background: var(--wash-amber);
}

.chip--building .chip__dot {
  animation: pulse-dot 1.6s var(--ease-in-out) infinite;
}

.chip--designed {
  color: var(--violet);
  border-color: color-mix(in srgb, var(--violet) 38%, transparent);
  background: color-mix(in srgb, var(--violet) 10%, transparent);
}

.chip--won {
  color: var(--amber);
  border-color: color-mix(in srgb, var(--amber) 45%, transparent);
  background: var(--wash-amber);
}

@keyframes pulse-dot {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.35;
  }
}

/* --- Buttons -------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.68rem 1.25rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  background: var(--surface-2);
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: all 0.22s var(--ease);
}

.btn:hover {
  color: var(--text);
  border-color: var(--accent-deep);
  background: var(--surface-3);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn svg {
  width: 15px;
  height: 15px;
  flex: none;
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
  border-color: transparent;
  color: #ffffff;
  box-shadow: 0 6px 20px -8px var(--glow-accent);
}

.btn--primary:hover {
  color: #ffffff;
  box-shadow: 0 10px 28px -8px var(--glow-accent);
  filter: brightness(1.06);
}

[data-theme="light"] .btn--primary {
  color: #ffffff;
}

[data-theme="light"] .btn--primary:hover {
  color: #ffffff;
}

.btn--ghost {
  background: transparent;
}

.btn--sm {
  padding: 0.42rem 0.85rem;
  font-size: 0.83rem;
  border-radius: var(--r-sm);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* --- Panels --------------------------------------------------------------- */

.panel {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
  overflow: hidden;
}

.panel__bar {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.panel__bar-dots {
  display: flex;
  gap: 5px;
  flex: none;
}

.panel__bar-dots i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--border-strong);
}

.panel__bar-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-transform: none;
  letter-spacing: 0.02em;
}

@media (max-width: 620px) {
  .panel__bar {
    flex-wrap: wrap;
    gap: 0.3rem 0.6rem;
    font-size: 0.66rem;
    padding: 0.6rem 0.8rem;
  }

  .panel__bar-right {
    margin-left: 0;
    width: 100%;
  }

  .panel__bar-dots {
    order: -1;
  }
}

.panel__body {
  padding: clamp(1.15rem, 2.4vw, 1.75rem);
}

/* Corner ticks: instrumentation framing. */
.ticked::before,
.ticked::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  border-color: var(--accent);
  opacity: 0.5;
  pointer-events: none;
}

.ticked::before {
  top: -1px;
  left: -1px;
  border-top: 1.5px solid;
  border-left: 1.5px solid;
  border-top-left-radius: 3px;
}

.ticked::after {
  bottom: -1px;
  right: -1px;
  border-bottom: 1.5px solid;
  border-right: 1.5px solid;
  border-bottom-right-radius: 3px;
}

/* --- Hero ----------------------------------------------------------------- */

.hero {
  position: relative;
  padding-block: clamp(2.75rem, 7vw, 5.25rem) clamp(2.5rem, 5vw, 4rem);
  overflow: hidden;
}

.hero__grid-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(ellipse 90% 65% at 50% 32%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 90% 65% at 50% 32%, #000 30%, transparent 78%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.hero__inner > * {
  min-width: 0;
}

@media (max-width: 940px) {
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 2.25rem;
  }
}

.hero__status {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  max-width: 100%;
  gap: 0.6rem;
  padding: 0.35rem 0.85rem 0.35rem 0.7rem;
  margin-bottom: 1.5rem;
  border: 1px solid color-mix(in srgb, var(--accent) 32%, transparent);
  border-radius: 999px;
  background: var(--wash-accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--accent-bright);
}

[data-theme="light"] .hero__status {
  color: var(--accent-deep);
}

.hero__status-dot {
  position: relative;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
}

.hero__status-dot::after {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  opacity: 0;
  animation: radar 2.4s var(--ease-in-out) infinite;
}

@keyframes radar {
  0% {
    transform: scale(0.6);
    opacity: 0.9;
  }
  100% {
    transform: scale(2.1);
    opacity: 0;
  }
}

.hero h1 {
  margin-bottom: 0.5rem;
}

.hero__role {
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  color: var(--accent);
  letter-spacing: -0.01em;
  margin-bottom: 1.35rem;
  min-height: 1.6em;
}

.hero__caret {
  display: inline-block;
  width: 9px;
  height: 1.05em;
  margin-left: 2px;
  vertical-align: -0.16em;
  background: var(--accent);
  animation: blink 1.05s steps(2, start) infinite;
}

@keyframes blink {
  to {
    visibility: hidden;
  }
}

.hero__lede {
  max-width: var(--measure-tight);
  margin-bottom: var(--s-6);
}

.hero__actions {
  margin-bottom: 2rem;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
}

.hero__meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.hero__meta svg {
  width: 13px;
  height: 13px;
  opacity: 0.8;
}

/* Hero visual */
.hero__visual {
  position: relative;
  min-width: 0;
  aspect-ratio: 1 / 0.86;
  min-height: 300px;
}

@media (max-width: 940px) {
  .hero__visual {
    min-height: 240px;
    aspect-ratio: auto;
  }
}

.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero__visual-label {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  /* It is a <p>, so it inherits the global prose measure. Absolutely
     positioned with a narrower max-width it pins left instead of centring. */
  max-width: none;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
  pointer-events: none;
}

/* --- Marquee rail --------------------------------------------------------- */

.rail {
  border-block: 1px solid var(--border);
  background: var(--surface);
  overflow: hidden;
  padding-block: 0.7rem;
}

.rail__track {
  display: flex;
  gap: 2.5rem;
  width: max-content;
  animation: marquee 42s linear infinite;
}

.rail:hover .rail__track {
  animation-play-state: paused;
}

.rail__item {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--muted);
  white-space: nowrap;
}

.rail__item b {
  color: var(--text-2);
  font-weight: 500;
}

.rail__item i {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.8;
  flex: none;
}

@keyframes marquee {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}

/* --- System cards --------------------------------------------------------- */

.systems-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 1.15rem;
}

.syscard {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--s-5);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
  overflow: hidden;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}

.syscard::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    380px circle at var(--mx, 50%) var(--my, 0%),
    var(--wash-accent),
    transparent 62%
  );
  opacity: 0;
  transition: opacity 0.35s var(--ease);
  pointer-events: none;
}

.syscard:hover {
  border-color: var(--border-strong);
  transform: translateY(-3px);
  box-shadow: var(--shadow-2);
}

.syscard:hover::before {
  opacity: 1;
}

.syscard__top {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.9rem;
}

.syscard__name {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.syscard__chip {
  margin-left: auto;
}

.syscard__viz {
  position: relative;
  height: 116px;
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--bg-deep);
  overflow: hidden;
}

.syscard__viz canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.syscard__desc {
  font-size: var(--fs-sm);
  line-height: var(--lh-sm);
  color: var(--text-2);
  margin-bottom: var(--s-5);
}

.syscard__facts {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--muted);
}

.syscard__facts li {
  display: flex;
  gap: 0.6rem;
}

.syscard__facts b {
  color: var(--accent);
  font-weight: 500;
  flex: none;
  min-width: 4.5rem;
}

.syscard__foot {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.syscard__stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1.1rem;
}

.tag {
  padding: 0.16rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--surface-2);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  white-space: nowrap;
}

/* --- Doctrine (build vs buy) ---------------------------------------------- */

.doctrine {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.doctrine__card {
  padding: var(--s-5);
  border: 1px solid var(--border);
  border-left: 2px solid var(--accent-c, var(--accent));
  border-radius: var(--r-md);
  background: var(--surface);
  transition: transform 0.25s var(--ease), background-color 0.25s var(--ease);
}

.doctrine__card:hover {
  transform: translateY(-2px);
  background: var(--surface-2);
}

.doctrine__tag {
  display: inline-block;
  margin-bottom: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-c, var(--accent));
}

.doctrine__card p {
  font-size: var(--fs-sm);
  line-height: var(--lh-sm);
  color: var(--text-2);
  margin: 0;
}

.doctrine__card--bought {
  --accent-c: var(--blue);
}

.doctrine__card--built {
  --accent-c: var(--accent);
}

.doctrine__card--detour {
  --accent-c: var(--violet);
}

.pullquote {
  margin: clamp(2rem, 4vw, 2.75rem) 0 0;
  padding: 1.5rem 1.75rem;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, var(--wash-accent), transparent 65%);
  font-size: clamp(1.05rem, 2.1vw, 1.28rem);
  line-height: 1.6;
  letter-spacing: -0.02em;
  color: var(--text);
}

.pullquote b {
  color: var(--accent);
  font-weight: 700;
}

.pullquote cite {
  display: block;
  margin-top: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-style: normal;
  letter-spacing: 0.05em;
  color: var(--muted);
}

/* --- Signals -------------------------------------------------------------- */

.signals {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(215px, 1fr));
  gap: 1rem;
}

.signal {
  position: relative;
  padding: var(--s-5);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface);
  overflow: hidden;
}

.signal__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  margin-bottom: 0.85rem;
  border-radius: var(--r-sm);
  background: var(--wash-accent);
  color: var(--accent);
}

.signal__icon svg {
  width: 16px;
  height: 16px;
}

.signal h3 {
  font-size: 0.98rem;
  margin-bottom: 0.4rem;
}

.signal p {
  font-size: var(--fs-sm);
  color: var(--text-2);
  line-height: var(--lh-sm);
  margin: 0;
}

/* --- Facts list ----------------------------------------------------------- */

.facts {
  display: grid;
  gap: var(--s-2);
  max-width: var(--measure-wide);
}

.facts li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.2rem;
  padding: var(--s-4) var(--s-5);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface);
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.facts li:hover {
  border-color: var(--border-strong);
  background: var(--surface-2);
}

.facts b {
  font-size: var(--fs-body);
  font-weight: 650;
  letter-spacing: -0.015em;
  color: var(--text);
}

.facts span {
  font-size: var(--fs-sm);
  line-height: var(--lh-sm);
  color: var(--muted);
}

/* --- Also shipped list ---------------------------------------------------- */

.also {
  border-top: 1px solid var(--border);
}

.also__row {
  display: grid;
  grid-template-columns: minmax(0, 210px) minmax(0, 1fr) auto;
  gap: var(--s-3) var(--s-6);
  align-items: baseline;
  padding: var(--s-5) var(--s-2);
  border-bottom: 1px solid var(--border);
  transition: background-color 0.25s var(--ease), padding-left 0.25s var(--ease);
}

.also__row:hover {
  background: var(--surface);
  padding-left: 0.85rem;
}

.also__name {
  font-weight: 650;
  letter-spacing: -0.02em;
}

.also__name span {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--faint);
  letter-spacing: 0.03em;
  margin-top: 0.2rem;
}

.also__what {
  font-size: var(--fs-sm);
  line-height: var(--lh-sm);
  color: var(--text-2);
  margin: 0;
  max-width: var(--measure);
}

.also__links {
  display: flex;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  white-space: nowrap;
}

@media (max-width: 720px) {
  .also__row {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
}

/* --- CTA ------------------------------------------------------------------ */

.cta {
  position: relative;
  padding: clamp(2.25rem, 5vw, 3.5rem);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  background: linear-gradient(150deg, var(--surface) 0%, var(--bg-deep) 100%);
  overflow: hidden;
  text-align: center;
}

.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 90% at 50% 0%, var(--wash-accent), transparent 70%);
  pointer-events: none;
}

.cta > * {
  position: relative;
}

/* Headings carry a max-width for measure, which leaves them left-aligned
   inside a centred block unless they also centre their own box. */
.cta .h1,
.cta .h2,
.cta .lede,
.cta p {
  margin-inline: auto;
}

.cta p {
  max-width: 46ch;
  margin-inline: auto;
  margin-top: 0.9rem;
}

.cta .btn-row {
  justify-content: center;
  margin-top: 1.75rem;
}

/* --- Footer --------------------------------------------------------------- */

.footer {
  border-top: 1px solid var(--border);
  padding-block: 2.25rem 2.75rem;
  background: var(--bg-deep);
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 2rem;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--muted);
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
}

.footer__links a {
  color: var(--text-2);
}

.footer__links a:hover {
  color: var(--accent);
}

.footer__mono {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--faint);
}

/* --- Reveal on scroll ----------------------------------------------------- */

/* Only hide when JS is present to un-hide it. Otherwise the page would be
   blank for anyone with scripts blocked. */
.js .reveal {
  opacity: 0;
  transform: translateY(18px);
}

.reveal {
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.js .reveal.is-in {
  opacity: 1;
  transform: none;
}

.reveal[data-delay="1"] {
  transition-delay: 0.08s;
}
.reveal[data-delay="2"] {
  transition-delay: 0.16s;
}
.reveal[data-delay="3"] {
  transition-delay: 0.24s;
}
.reveal[data-delay="4"] {
  transition-delay: 0.32s;
}

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

/* --- 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;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }

  .rail__track {
    animation: none;
  }
}

/* Keeps the arrow beside the label instead of dropping to its own line when
   the pill wraps on a narrow screen. */
.hero__status-text {
  flex: 1 1 auto;
  min-width: 0;
}

/* Each fact links to wherever the detail actually lives. */
.facts li {
  padding: 0;
}

.facts li a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.2rem var(--s-4);
  padding: var(--s-4) var(--s-5);
  color: inherit;
}

.facts li a b {
  grid-column: 1;
}

.facts li a span {
  grid-column: 1;
}

.facts li a svg {
  grid-column: 2;
  grid-row: 1 / span 2;
  color: var(--faint);
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}

.facts li:hover a svg {
  color: var(--accent);
  transform: translateX(2px);
}

.facts li:hover b {
  color: var(--accent);
}