/* Linacti Software: one glyph grid, one ink, density as tone. */

@font-face {
  font-family: "Doto";
  src: url("../fonts/doto-latin-ext.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Doto";
  src: url("../fonts/doto-latin.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Martian Mono";
  src: url("../fonts/martian-mono-latin-ext.woff2") format("woff2");
  font-weight: 100 800;
  font-stretch: 75% 112.5%;
  font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Martian Mono";
  src: url("../fonts/martian-mono-latin.woff2") format("woff2");
  font-weight: 100 800;
  font-stretch: 75% 112.5%;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  color-scheme: dark;

  /* ground and the single ink, stepped like the glyph ramp */
  --ground: #050505;
  --ink: #f2f2ef;
  --ink-80: #c9c9c5;
  --ink-60: #9d9d99;
  --ink-40: #807f7b;
  --ink-20: #353533;
  --ink-10: #1c1c1b;

  /* brand: the mark and the primary action only */
  --mark-red: #ff0000; /* read by the hero canvas */
  /* white on pure brand red is 4.0:1; actions sit one step deeper */
  --action-red: #e30000;
  --action-red-deep: #c40000;
  /* the card's hairline: focus and active state only */
  --signal: #ffd42a;
  /* validation and send failures */
  --error: #ff6b6b;

  --font-display: "Doto", "Martian Mono", ui-monospace, monospace;
  --font-mono: "Martian Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  /* fixed size ramp: each step is one density level */
  --step--2: 0.625rem; /* mobile stream labels: must fit the gaps between the mark's bars */
  --step--1: 0.75rem;
  --step-0: clamp(0.875rem, 0.84rem + 0.15vw, 0.95rem);
  --step-1: clamp(1rem, 0.94rem + 0.3vw, 1.15rem);
  --step-2: clamp(1.35rem, 1.15rem + 0.9vw, 1.9rem);
  --step-3: clamp(2rem, 1.5rem + 2.4vw, 3.6rem);
  --step-4: clamp(2.6rem, 1.6rem + 4.6vw, 6rem);

  --gutter: clamp(1rem, 0.5rem + 2.5vw, 3rem);
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: clamp(5rem, 3rem + 7vw, 9rem);

  --measure: 64ch;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  background: var(--ground);
  scroll-behavior: smooth;
  scrollbar-color: var(--ink-20) var(--ground);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink-80);
  font-family: var(--font-mono);
  font-size: var(--step-0);
  font-stretch: 87.5%;
  line-height: 1.7;
  font-variant-numeric: tabular-nums;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  caret-color: var(--signal);
}

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

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--ground); }
::-webkit-scrollbar-thumb { background: var(--ink-20); border: 2px solid var(--ground); }
::-webkit-scrollbar-thumb:hover { background: var(--ink-40); }

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

a {
  color: var(--ink);
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.3em;
  text-decoration-color: var(--ink-40);
  transition: text-decoration-color 160ms var(--ease-out), color 160ms var(--ease-out);
}
a:hover { text-decoration-color: var(--ink); }

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

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -100px;
  z-index: 50;
  padding: 0.6rem 1rem;
  background: var(--signal);
  color: #000;
  text-decoration: none;
}
.skip-link:focus { top: 0.75rem; }

/* ---------- type ---------- */

h1, h2, h3 {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: 0;
  text-wrap: balance;
}
h1 { font-size: var(--step-4); }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-2); line-height: 1.1; }

p { margin: 0; max-width: var(--measure); text-wrap: pretty; }
p + p { margin-top: 1em; }

strong { color: var(--ink); font-weight: 600; }

/* ---------- controls: bracketed, in the grid's vocabulary ---------- */

.btn {
  --btn-ink: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 0.65em;
  min-height: 2.75rem;
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--ink-40);
  background: transparent;
  color: var(--btn-ink);
  font: inherit;
  font-weight: 600;
  font-stretch: 87.5%;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 160ms var(--ease-out), border-color 160ms var(--ease-out), color 160ms var(--ease-out);
}
.btn::before { content: "[" / ""; color: var(--ink-40); }
.btn::after { content: "]" / ""; color: var(--ink-40); }
.btn:hover { border-color: var(--ink); background: var(--ink-10); }
.btn:active { border-color: var(--signal); }

.btn--primary {
  border-color: var(--action-red);
  background: var(--action-red);
  color: #fff;
}
.btn--primary::before,
.btn--primary::after { color: rgb(255 255 255 / 0.6); }
.btn--primary:hover { background: var(--action-red-deep); border-color: var(--action-red-deep); }

.btn[disabled],
.btn[aria-disabled="true"] {
  cursor: progress;
  opacity: 0.6;
}

.arrow { display: inline-block; transition: transform 200ms var(--ease-out); }
.btn:hover .arrow { transform: translateX(0.25em); }

/* ---------- header ---------- */

.site-header {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--gutter);
}

.brand { flex: none; display: block; }
.brand img { width: clamp(8.5rem, 7rem + 4vw, 11rem); height: auto; }

.site-nav { margin-left: auto; }
.site-nav ul {
  display: flex;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-nav a {
  color: var(--ink-60);
  font-size: var(--step--1);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-decoration: none;
}
.site-nav a:hover { color: var(--ink); }
.site-nav a::before { content: "[" / ""; color: var(--ink-20); margin-right: 0.35em; }
.site-nav a::after { content: "]" / ""; color: var(--ink-20); margin-left: 0.35em; }

.lang {
  display: flex;
  gap: 0.15em;
  font-size: var(--step--1);
  letter-spacing: 0.06em;
}
.lang a, .lang span {
  padding: 0.4rem 0.35rem;
  text-decoration: none;
  color: var(--ink-40);
}
.lang a:hover { color: var(--ink); }
.lang [aria-current="true"] { color: var(--ink); }

.site-header .btn { font-size: var(--step--1); min-height: 2.5rem; }
.site-nav { display: flex; align-items: center; gap: var(--space-3); }
.nav-toggle { display: none; }
.site-cta .short { display: none; }
.btn .visually-hidden { text-transform: none; }

/* ---------- hero: the live scene ---------- */

.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: min(100svh, 1100px);
  overflow: hidden;
  isolation: isolate;
}

.scene {
  position: absolute;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
}

.hero__head {
  padding: clamp(1.5rem, 1rem + 3vh, 4rem) var(--gutter) 0;
}
.hero__head h1 { max-width: 17ch; font-size: clamp(2.4rem, 1.4rem + 4vw, 5.25rem); }
.hero__lede {
  margin-top: var(--space-3);
  max-width: 60ch;
  color: var(--ink-80);
  font-size: var(--step-1);
  line-height: 1.6;
}
.hero__lede,
.hero__head h1 { position: relative; }
.hero__lede span { background: var(--ground); box-shadow: 0 0 0 0.25em var(--ground); box-decoration-break: clone; -webkit-box-decoration-break: clone; }

/* the stage is the band where the mark and its three streams live */
.hero__stage {
  position: relative;
  flex: 1 1 auto;
  min-height: 15rem;
  margin: var(--space-3) 0;
}

.streams {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}
.streams li {
  position: absolute;
  left: var(--gutter);
  top: var(--y, 0);
  transform: translateY(-50%);
  padding: 0.15rem 0.6rem;
  background: var(--ground);
  color: var(--ink);
  font-size: var(--step-0);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}
.streams li::before { content: "> " / ""; color: var(--ink-40); }

/* no-JS and pre-layout: the streams read as a plain list */
.streams:not([data-placed]) { position: static; display: grid; gap: 0.75rem; padding: var(--space-3) var(--gutter); }
.streams:not([data-placed]) li { position: static; transform: none; justify-self: start; }

.hero__action {
  position: relative;
  padding: 0 var(--gutter) clamp(1.25rem, 1rem + 2vh, 2.5rem);
}

.prompt {
  display: flex;
  align-items: stretch;
  max-width: 58rem;
  border: 1px solid var(--ink-40);
  background: var(--ground);
  transition: border-color 160ms var(--ease-out);
}
.prompt:focus-within { border-color: var(--signal); }
.prompt__sign {
  display: grid;
  place-items: center;
  padding: 0 0.25rem 0 1rem;
  color: var(--ink-60);
  font-weight: 700;
}
.prompt input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 0.95rem 0.75rem;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: var(--step-1);
  outline: none;
}
.prompt input::placeholder { color: var(--ink-60); opacity: 1; }
.prompt .btn { border: 0; min-height: 100%; padding-inline: 1.25rem; }

.hero__label {
  display: block;
  margin-bottom: 0.6rem;
  color: var(--ink-80);
  font-size: var(--step-0);
}

.direct {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 1.25rem;
  margin: 0.9rem 0 0;
  padding: 0;
  list-style: none;
  color: var(--ink-60);
  font-size: var(--step--1);
}
.direct li:first-child { color: var(--ink-40); }

/* ---------- density rules between sections ---------- */

.rule {
  display: block;
  overflow: hidden;
  margin: 0;
  padding: 0 var(--gutter);
  color: var(--ink-20);
  font-size: var(--step-0);
  line-height: 1;
  letter-spacing: 0.35em;
  white-space: nowrap;
  user-select: none;
}

/* ---------- sections ---------- */

.section {
  padding: var(--space-6) var(--gutter);
}
.section__intro {
  display: grid;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}
.section__intro p { color: var(--ink-60); font-size: var(--step-1); line-height: 1.6; }

/* headings thicken down the page, like the rules above them */
[data-density="1"] h2 { font-weight: 780; }
[data-density="3"] h2 { font-weight: 810; }
[data-density="5"] h2 { font-weight: 840; }
[data-density="7"] h2 { font-weight: 870; }
[data-density="9"] h2 { font-weight: 900; }

/* specialisations: the mark's three bars, unrolled */
.lanes { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--ink-20); }
.lane {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: var(--space-3) var(--space-5);
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--ink-20);
}
.lane__bar {
  grid-column: 1 / -1;
  display: block;
  overflow: hidden;
  color: var(--ink-40);
  font-size: var(--step--1);
  line-height: 1;
  letter-spacing: 0.2em;
  white-space: nowrap;
  user-select: none;
}
.lane__bar b { color: var(--ink); font-weight: 400; }
.lane__bar i { color: var(--ink); font-style: normal; font-weight: 700; }
.lane h3 { font-size: var(--step-2); font-weight: 900; color: var(--ink); line-height: 1.1; }
.lane__body p { color: var(--ink-80); font-size: var(--step-1); line-height: 1.65; }
.lane__builds {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  margin: var(--space-3) 0 0;
  padding: 0;
  list-style: none;
  font-size: var(--step--1);
  color: var(--ink-60);
}
.lane__builds li { padding: 0.25rem 0.6rem; border: 1px solid var(--ink-20); }

/* process: the ramp itself */
.track {
  display: block;
  overflow: hidden;
  margin-bottom: var(--space-4);
  color: var(--ink);
  font-size: var(--step-1);
  line-height: 1;
  letter-spacing: 0.08em;
  white-space: nowrap;
  user-select: none;
}
.track .lit { color: var(--signal); }

.stages {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--space-4) var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}
.stage__glyph {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: var(--step-3);
  font-weight: 700;
  line-height: 1;
}
.stage h3 { font-family: var(--font-mono); font-size: var(--step-1); font-weight: 700; letter-spacing: 0.02em; text-transform: uppercase; margin-bottom: 0.6rem; }
.stage p { color: var(--ink-60); }

.note {
  margin-top: var(--space-4);
  color: var(--ink-40);
  font-size: var(--step--1);
}

/* work: honest rendering-in-progress frame */
.render {
  position: relative;
  display: grid;
  align-content: center;
  justify-items: start;
  gap: var(--space-3);
  min-height: clamp(18rem, 14rem + 16vw, 30rem);
  padding: var(--space-5) clamp(1.25rem, 1rem + 4vw, 5rem);
  overflow: hidden;
  border: 1px solid var(--ink-20);
  background: var(--ground);
}
.render > :not(.render__field) { position: relative; }
.render__field {
  position: absolute;
  inset: 0;
  margin: 0;
  color: var(--ink-20);
  font-size: var(--step--1);
  line-height: 1.4;
  white-space: pre;
  overflow: hidden;
  user-select: none;
}
.render p { padding: 0.5rem 0.75rem; background: var(--ground); font-size: var(--step-1); color: var(--ink-80); max-width: 46ch; }
.render h3 { padding: 0.25rem 0.75rem; background: var(--ground); max-width: 18ch; }


/* team */
.team {
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  gap: var(--space-5);
  align-items: start;
}
.team h2 { font-size: var(--step-3); max-width: 16ch; }
.principles { display: grid; gap: var(--space-4); margin: 0; padding: 0; list-style: none; }
.principles h3 { font-family: var(--font-mono); font-size: var(--step-1); font-weight: 700; text-transform: uppercase; letter-spacing: 0.02em; margin-bottom: 0.5rem; }
.principles h3::before { content: "@ " / ""; color: var(--ink-40); }
.principles p { color: var(--ink-60); }

/* contact */
.contact {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  gap: var(--space-5);
  align-items: start;
}
.contact__head { grid-column: 1 / -1; display: grid; gap: var(--space-3); }
.contact__head h2 { font-size: var(--step-4); max-width: 14ch; }
.contact__head p { color: var(--ink-60); font-size: var(--step-1); }

.form { display: grid; gap: var(--space-3); }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.field { display: grid; gap: 0.45rem; }
.field label,
.field legend {
  padding: 0;
  color: var(--ink-80);
  font-size: var(--step-0);
  font-weight: 600;
}
.field .opt { color: var(--ink-40); text-transform: none; letter-spacing: 0; }
.field input,
.field textarea {
  width: 100%;
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--ink-40);
  border-radius: 0;
  background: var(--ground);
  color: var(--ink);
  font: inherit;
  font-size: var(--step-1);
  transition: border-color 160ms var(--ease-out);
}
.field textarea { min-height: 9.5rem; resize: vertical; line-height: 1.6; }
.field input::placeholder,
.field textarea::placeholder { color: var(--ink-60); opacity: 1; }
.field input:hover,
.field textarea:hover { border-color: var(--ink-60); }
.field input:focus,
.field textarea:focus { outline: none; border-color: var(--signal); }
.field [aria-invalid="true"] { border-color: var(--error); }
.field__error { color: var(--error); font-size: var(--step--1); min-height: 0; }
.field__error:empty { display: none; }

fieldset.field { margin: 0; padding: 0; border: 0; }
.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.chip span {
  display: inline-block;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--ink-40);
  color: var(--ink-80);
  font-size: var(--step--1);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: border-color 160ms var(--ease-out), color 160ms var(--ease-out), background-color 160ms var(--ease-out);
}
.chip span::before { content: "( ) " / ""; color: var(--ink-40); }
.chip input:hover + span { border-color: var(--ink); }
.chip input:checked + span { border-color: var(--signal); color: var(--ink); }
.chip input:checked + span::before { content: "(@) " / ""; color: var(--signal); }
.chip input:focus-visible + span { outline: 2px solid var(--signal); outline-offset: 3px; }

.form__foot { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2) var(--space-3); }
.form__status { font-size: var(--step--1); color: var(--ink-60); }
.form__status[data-state="sent"] { color: var(--ink); }
.form__status[data-state="sent"]::before { content: "@ " / ""; color: var(--ink); }
.form__status[data-state="error"] { color: var(--error); }
.form__status[data-state="sending"]::after { content: "" / ""; animation: dots 1.2s steps(4) infinite; }
@keyframes dots { 0% { content: ""; } 25% { content: "."; } 50% { content: ".."; } 75% { content: "..."; } }

.channels { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--ink-20); }
.channels li { padding: var(--space-3) 0; border-bottom: 1px solid var(--ink-20); }
.channels .k { display: block; margin-bottom: 0.35rem; color: var(--ink-40); font-size: var(--step--1); letter-spacing: 0.06em; text-transform: uppercase; }
.channels a { font-size: var(--step-1); overflow-wrap: anywhere; }
.channels .btn { margin-top: 0.25rem; }

/* footer */
.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) var(--gutter) var(--space-5);
  border-top: 1px solid var(--ink-20);
  color: var(--ink-40);
  font-size: var(--step--1);
}
.site-footer img { width: 7.5rem; height: auto; }
.site-footer nav { display: flex; gap: var(--space-3); }
.site-footer a { color: var(--ink-60); }

/* ---------- subpages ---------- */

.page .site-header { border-bottom: 1px solid var(--ink-10); }
.site-nav a[aria-current="page"] { color: var(--ink); }
.site-nav a[aria-current="page"]::before,
.site-nav a[aria-current="page"]::after { color: var(--ink-40); }

.page-intro { padding-top: var(--space-5); padding-bottom: var(--space-4); }
.page-intro h1 { max-width: 17ch; font-size: clamp(2.4rem, 1.4rem + 4vw, 5.25rem); font-weight: 800; }
.page-intro__lede { margin-top: var(--space-3); color: var(--ink-80); font-size: var(--step-1); line-height: 1.6; }

/* the index: one row per entry, opened in place by a real disclosure button */
.index-section { padding-top: 0; }
.idx-head,
.idx__row,
.idx__panel {
  display: grid;
  grid-template-columns: minmax(9.5rem, 2fr) minmax(0, 5fr) minmax(0, 6fr) 3rem;
  gap: var(--space-3);
  align-items: baseline;
}
.idx-head {
  padding: 0 0 var(--space-1);
  border-bottom: 1px solid var(--ink-40);
  color: var(--ink-40);
  font-size: var(--step--1);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.idx-head span:nth-child(3) { grid-column: 3 / -1; }
.idx-list { margin: 0; padding: 0; list-style: none; }
.idx { border-bottom: 1px solid var(--ink-20); }
.idx__row {
  position: relative;
  padding: var(--space-3) 0;
}
.idx__lead { display: grid; gap: 0.35rem; margin: 0; color: var(--ink-60); font-size: var(--step--1); }
.idx__stage { letter-spacing: 0.04em; text-transform: uppercase; }
.meter {
  color: var(--ink-20);
  font-size: var(--step-0);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.12em;
  white-space: nowrap;
}
.meter b { color: var(--ink); font-weight: 700; }
/* weight comes from the section density (Density Weight Rule) */
.idx__name { margin: 0; font-size: var(--step-2); line-height: 1.1; }
.idx__btn {
  display: block;
  width: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  background: none;
  color: var(--ink);
  font: inherit;
  text-align: left;
  cursor: pointer;
}
/* the whole row is the hit area; the name stays the accessible label */
.idx__btn::after { content: ""; position: absolute; inset: 0; }
.idx__btn:focus-visible { outline: none; }
.idx__row:has(.idx__btn:focus-visible) { outline: 2px solid var(--signal); outline-offset: 4px; }
.idx__toggle {
  grid-column: 4;
  grid-row: 1;
  justify-self: end;
  color: var(--ink-40);
  font-family: var(--font-mono);
  font-size: var(--step-0);
  font-weight: 600;
  transition: color 160ms var(--ease-out);
}
.idx__toggle::before { content: "[+]"; }
html:not(.js) .idx__toggle { display: none; }
.idx__row:hover .idx__toggle { color: var(--ink); }
.idx__row:has([aria-expanded="true"]) .idx__toggle::before { content: "[−]"; }
.idx__row:has([aria-expanded="true"]) .idx__toggle { color: var(--signal); }
.idx__meta { color: var(--ink-60); }
.idx__row:has([aria-expanded="true"]) .idx__meta { color: var(--ink-80); }

.idx__panel {
  align-items: start;
  row-gap: var(--space-4);
  padding: 0 0 var(--space-4);
}
/* the open panel keeps the index's own column lines */
.idx__panel > :nth-child(1) { grid-column: 2; }
.idx__panel > :nth-child(2) { grid-column: 3 / -1; }
.idx__panel > :nth-child(3) { grid-column: 2; }
.idx__panel[hidden] { display: none; }
.idx__panel h3 {
  margin-bottom: var(--space-2);
  color: var(--ink-60);
  font-family: var(--font-mono);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.idx__panel p { color: var(--ink-80); }
.idx__list { display: grid; gap: 0.6rem; margin: 0 0 var(--space-3); padding: 0; list-style: none; color: var(--ink-80); }
.idx__list li { display: grid; grid-template-columns: 1.6em 1fr; }
.idx__list li::before { content: "@" / ""; color: var(--ink-40); }
.idx__list--when li::before { content: ">" / ""; }
.idx__panel .btn { white-space: normal; text-align: left; }
.idx-legend { margin-top: var(--space-3); color: var(--ink-60); font-size: var(--step--1); }
.idx-legend b { color: var(--ink); font-weight: 700; }

/* template slots: content the owner still has to supply */
.todo {
  padding: 0 0.3em;
  outline: 1px dashed var(--ink-40);
  outline-offset: 1px;
  color: var(--ink-60);
  font-family: var(--font-mono);
  font-weight: 400;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}
.idx__name .todo { font-size: var(--step-1); }

/* billing: one quiet, plain statement */
.billing { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: var(--space-3) var(--space-5); align-items: start; }
.billing__body p { color: var(--ink-80); font-size: var(--step-1); line-height: 1.65; }

/* areas: the homepage lanes, compact */
.areas { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-4) var(--space-3); margin: 0; padding: 0; list-style: none; }
.area .lane__bar { margin-bottom: var(--space-2); }
.area h3 { margin-bottom: 0.6rem; font-size: var(--step-2); font-weight: 900; }
.area p { color: var(--ink-60); }

@media (max-width: 900px) {
  .idx-head { display: none; }
  .idx__row { grid-template-columns: minmax(0, 1fr) 2.5rem; gap: 0.5rem var(--space-2); padding: var(--space-3) 0; }
  .idx__lead { grid-column: 1 / -1; grid-row: 1; }
  .idx__name { grid-column: 1; grid-row: 2; }
  .idx__toggle { grid-column: 2; grid-row: 2; }
  .idx__meta { grid-column: 1 / -1; grid-row: 3; }
  .idx__panel { grid-template-columns: minmax(0, 1fr); row-gap: var(--space-3); padding-bottom: var(--space-4); }
  .idx__panel > :nth-child(n) { grid-column: 1 / -1; }
  .billing, .areas { grid-template-columns: minmax(0, 1fr); }
}

/* contact page */
.contact-page { padding-top: 0; }
.stages--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.company { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: var(--space-4); align-items: start; }
.facts { display: grid; margin: 0; border-top: 1px solid var(--ink-20); }
.facts > div { display: grid; grid-template-columns: 9rem minmax(0, 1fr); gap: var(--space-2); padding: var(--space-2) 0; border-bottom: 1px solid var(--ink-20); }
.facts dt { color: var(--ink-40); font-size: var(--step--1); letter-spacing: 0.06em; text-transform: uppercase; }
.facts dd { margin: 0; color: var(--ink); }
.billing:has(.company) { grid-template-columns: minmax(0, 1fr); }
@media (max-width: 900px) {
  .company { grid-template-columns: minmax(0, 1fr); }
  .facts > div { grid-template-columns: 6.5rem minmax(0, 1fr); }
}

/* ---------- responsive ---------- */

@media (max-width: 1080px) {
  .stages { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stages li:last-child { grid-column: 1 / -1; }
  .stages--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stages--4 li:last-child { grid-column: auto; }
}

@media (max-width: 900px) {
  .js .nav-toggle { display: inline-flex; margin-left: auto; }
  .js .nav-toggle[aria-expanded="true"] { border-color: var(--signal); }
  .js .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 20;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: var(--space-1) var(--gutter) var(--space-3);
    border-bottom: 1px solid var(--ink-20);
    background: var(--ground);
  }
  .js .site-nav.is-open { display: flex; }
  .js .site-nav ul { flex-direction: column; gap: 0; }
  .js .site-nav li a { display: block; padding: 0.8rem 0; font-size: var(--step-0); border-bottom: 1px solid var(--ink-10); }
  .js .site-nav .lang { padding-top: var(--space-2); font-size: var(--step-0); }
  .site-nav:not(.is-open) { flex-wrap: wrap; }
  html:not(.js) .site-nav { margin-left: auto; }
  html:not(.js) .site-nav ul { flex-wrap: wrap; gap: var(--space-2); }
  .lane,
  .team,
  .contact { grid-template-columns: minmax(0, 1fr); }
  .lane { gap: var(--space-3); padding: var(--space-4) 0; }
}

@media (max-width: 560px) {
  .site-header { gap: var(--space-2); }
  .brand img { width: 7.25rem; }
  .site-cta .long { display: none; }
  .site-cta .short { display: inline; }
  .site-header .btn { padding-inline: 0.7rem; }
  .hero__stage { min-height: 15rem; }
  .streams[data-mobile] li { left: calc(var(--gutter) - 0.25rem); padding: 0 0.25rem; font-size: var(--step--2); line-height: 1; letter-spacing: 0; }
  .prompt { flex-wrap: wrap; }
  .prompt input { flex-basis: calc(100% - 2.5rem); padding-left: 0.5rem; }
  .prompt .btn { flex: 1 1 100%; justify-content: center; }
  .stages { grid-template-columns: minmax(0, 1fr); }
  .form__row { grid-template-columns: minmax(0, 1fr); }
  .site-footer { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

@media (forced-colors: active) {
  .btn, .prompt, .field input, .field textarea, .chip span { border: 1px solid CanvasText; }
}