/* =========================================================================
   ACE Console
   Primary reference: Oxide Computer (composition, 1px radii, no shadows,
   depth by tonal step, accent = state only).
   Canvas + hero field: Neon. Illustration system: plain-text graphs.
   Accent role + inset ember glow: Altius / Coinshift.
   One accent, one job: ember marks the thing that carries meaning.
   ========================================================================= */

:root {
  /* ground */
  --void: #000000;
  --depth: #06070A;
  --carbon: #0B0E12;
  --graphite: #12161A;
  --rule: #1B1F24;
  --slate: #262B31;

  /* type */
  --dim: #4E545B;
  --ash: #7E848B;
  --platinum: #B6BABE;
  --snow: #E9EAEB;

  /* the single accent */
  --ember: #FF3B12;
  --ember-lit: #FF6A44;
  --ember-deep: #180703;
  --ember-line: rgba(255, 59, 18, 0.38);
  --ember-glow: rgba(255, 59, 18, 0.14);

  /* the tearsheet */
  --bone: #EDE7DF;
  --bone-2: #E3DBD1;
  --bone-ink: #16110E;
  --bone-ash: #6B6157;
  --bone-rule: #CDC3B6;
  --bone-ember: #C3300B;

  --sans: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --wrap: 1180px;
  --gut: clamp(20px, 4vw, 48px);
  --band: clamp(72px, 9vw, 132px);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--void);
  color: var(--platinum);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; }

::selection { background: var(--ember); color: #fff; }

:focus-visible {
  outline: 1px solid var(--ember);
  outline-offset: 3px;
}

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--ember-deep); color: var(--ember-lit);
  font-family: var(--mono); font-size: 12px; padding: 10px 16px;
  border: 1px solid var(--ember-line);
}
.skip:focus { left: 12px; top: 12px; }

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

/* ------------------------------------------------------------- typography */

h1, h2, h3 {
  font-weight: 400;
  color: var(--snow);
  letter-spacing: -0.028em;
  text-wrap: balance;
  margin: 0;
}

h1 { font-size: clamp(2.15rem, 4.4vw, 3.35rem); line-height: 1.08; }
h2 { font-size: clamp(1.75rem, 3.4vw, 2.7rem); line-height: 1.12; }
h3 { font-size: 1.125rem; line-height: 1.35; letter-spacing: -0.012em; }

p { margin: 0; text-wrap: pretty; }

.tag,
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ember);
  margin: 0;
}

.eyebrow span { color: var(--ember); }

/* ----------------------------------------------------------------- buttons */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 12px 18px;
  border-radius: 1px;
  border: 1px solid transparent;
  transition: color .18s ease, background-color .18s ease,
              border-color .18s ease, box-shadow .18s ease;
}

/* Oxide's filled control (dark accent fill, bright accent text) carrying
   Altius's inset ember glow. The accent is never a flat brand-colour fill. */
.btn-primary {
  background: var(--ember-deep);
  border-color: var(--ember-line);
  color: var(--ember-lit);
  box-shadow: inset 0 0 22px var(--ember-glow);
}
.btn-primary:hover {
  color: #FF8465;
  border-color: var(--ember);
  box-shadow: inset 0 0 30px rgba(255, 59, 18, 0.24);
}

.btn-ghost {
  border-color: var(--slate);
  color: var(--platinum);
}
.btn-ghost:hover { border-color: var(--ash); color: var(--snow); }

.btn-lg { padding: 15px 26px; font-size: 13px; }

/* --------------------------------------------------------------------- nav */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(0, 0, 0, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}

.nav-in {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 62px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  margin-right: auto;
}
.brand img { width: 22px; height: 22px; opacity: .95; }

.brand-mark {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--snow);
}
.brand-sub {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
  padding-left: 10px;
  border-left: 1px solid var(--rule);
}

.nav-links { display: flex; gap: 4px; }
.nav-links a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--ash);
  padding: 8px 10px;
  border-radius: 1px;
  transition: color .16s ease, background-color .16s ease;
}
.nav-links a i { font-style: normal; font-size: 10px; color: var(--dim); }
.nav-links a:hover { color: var(--snow); background: var(--graphite); }
.nav-links a:hover i { color: var(--ember); }

.nav-toggle {
  display: none;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--platinum);
  background: transparent;
  border: 1px solid var(--slate);
  border-radius: 1px;
  padding: 9px 12px;
  cursor: pointer;
}

.nav-drawer { display: none; border-top: 1px solid var(--rule); padding: 12px var(--gut) 22px; }
.nav-drawer a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--platinum);
  text-decoration: none;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
}
.nav-drawer a i { font-style: normal; font-size: 10px; color: var(--ember); }
.nav-drawer .btn { margin-top: 16px; justify-content: center; border-bottom: 1px solid var(--ember-line); }

@media (max-width: 940px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: inline-block; }
  .nav-drawer[data-open] { display: block; }
  .brand-sub { display: none; }
}

/* -------------------------------------------------------------------- hero */

.hero {
  position: relative;
  padding: clamp(56px, 8vw, 104px) 0 clamp(64px, 8vw, 112px);
  border-bottom: 1px solid var(--rule);
  overflow: hidden;
}

/* Langbase's faint structural grid, laid under Neon's data-stream field. */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(120% 80% at 50% 0%, #000 30%, transparent 78%);
  pointer-events: none;
}

.hero-field {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: .9;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(to top, #000 4%, rgba(0, 0, 0, .35) 46%, transparent 82%);
  mask-image: linear-gradient(to top, #000 4%, rgba(0, 0, 0, .35) 46%, transparent 82%);
}

.hero-in {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}

.hero-copy { max-width: 47ch; }
.hero-copy h1 { margin: 18px 0 0; }

.lede {
  margin-top: 20px;
  color: var(--ash);
  font-size: clamp(1rem, 1.35vw, 1.125rem);
  max-width: 46ch;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 40px 0 0;
  border-top: 1px solid var(--rule);
}
.hero-stats > div { padding: 14px 16px 0 0; border-right: 1px solid var(--rule); }
.hero-stats > div + div { padding-left: 16px; }
.hero-stats > div:last-child { border-right: 0; }
.hero-stats dt {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
}
.hero-stats dd {
  margin: 6px 0 0;
  font-family: var(--mono);
  font-size: 15px;
  color: var(--snow);
}

@media (max-width: 900px) {
  .hero-in { grid-template-columns: 1fr; }
  .hero-graph { order: 2; }
}

/* ------------------------------------------------------------------ graphs */

.graph {
  margin: 0;
  container-type: inline-size;
}

.graph pre {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(9px, 1.4vw, 13px);
  /* JetBrains Mono advances 0.6em per cell; size the block so a diagram always
     fits its column exactly, never scrolls, never wraps. */
  font-size: min(13px, calc(100cqw / (var(--cols, 56) * 0.615)));
  line-height: 1.62;
  letter-spacing: 0;
  white-space: pre;
  overflow: visible;
}

.graph .st { color: #2C3238; }   /* structure */
.graph .dm { color: var(--dim); } /* secondary data */
.graph .tx { color: var(--platinum); }
.graph .ac { color: var(--ember); }

/* ------------------------------------------------------------------- bands */

.band {
  padding: var(--band) 0;
  border-bottom: 1px solid var(--rule);
  background: var(--void);
}
.band-tight { padding: clamp(48px, 6vw, 88px) 0; background: var(--depth); }

.band-head { max-width: 46ch; margin-bottom: clamp(36px, 5vw, 60px); }
.band-head h2 { margin-top: 14px; }
.band-head-wide { max-width: 62ch; }
.band-lede { margin-top: 20px; color: var(--ash); }

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}
.split-copy h2 { margin: 14px 0 18px; }
.split-copy p { color: var(--ash); max-width: 44ch; }
@media (max-width: 860px) {
  .split { grid-template-columns: 1fr; }
  .split-reverse .split-graph { order: 2; }
}

/* two method panels */
.duo {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.panel {
  background: var(--carbon);
  padding: clamp(24px, 3vw, 34px);
  display: flex;
  flex-direction: column;
}
/* the two panels' prose sits on one baseline even though their diagrams differ */
.panel h3 { margin: 28px 0 10px; padding-top: 8px; }
.panel .graph + h3 { margin-top: auto; }
.panel p { color: var(--ash); font-size: 0.95rem; }

/* verticals — Langbase grid cells */
.cells {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
@media (max-width: 900px) { .cells { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) {
  .cells { grid-template-columns: 1fr; }
  .cells li { min-height: 104px; }
  .cell-note { min-height: 0; padding-block: 18px; }
}
.cells li {
  background: var(--carbon);
  padding: 22px 20px 26px;
  min-height: 128px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: background-color .2s ease;
}
.cells li:hover { background: var(--graphite); }
.cells li i {
  font-style: normal;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ember);
}
.cells li span { color: var(--snow); font-size: 1.02rem; letter-spacing: -0.01em; }
.cell-note { justify-content: flex-end; }
.cell-note span { color: var(--dim) !important; font-family: var(--mono); font-size: 12px; }

/* assurance definitions */
.defs { margin: 30px 0 0; display: grid; gap: 0; }
.defs > div { padding: 20px 0; border-top: 1px solid var(--rule); }
.defs > div:last-child { border-bottom: 1px solid var(--rule); }
.defs dt {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--snow);
}
.defs dd { margin: 8px 0 0; color: var(--ash); font-size: 0.95rem; max-width: 46ch; }

/* bench */
.trio {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.trio article { background: var(--carbon); padding: clamp(24px, 3vw, 32px); }
.trio p { color: var(--ash); font-size: 0.95rem; }
.trio .figure {
  font-family: var(--mono);
  font-size: clamp(1.9rem, 3.4vw, 2.6rem);
  letter-spacing: -0.02em;
  color: var(--ember);
  margin-bottom: 16px !important;
}

/* --------------------------------------------------- the tearsheet (paper) */

/* One band inverts to paper. Altius alternates thermal temperature; here the
   inversion is reserved for the only section carrying client evidence — the
   diagrams read as something printed off the machine rather than rendered. */
.sheet {
  position: relative;
  background: var(--bone);
  color: var(--bone-ink);
  padding: clamp(72px, 9vw, 128px) 0;
}

/* perforated edges, top and bottom */
.sheet::before,
.sheet::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 9px;
  background-image: radial-gradient(circle at 6px 50%, var(--void) 2.6px, transparent 3px);
  background-size: 12px 9px;
  opacity: .55;
}
.sheet::before { top: 0; }
.sheet::after { bottom: 0; }

.sheet .tag { color: var(--bone-ember); }
.sheet h2, .sheet h3 { color: var(--bone-ink); }
.sheet-head { max-width: 56ch; }
.sheet-head h2 { margin: 14px 0 18px; }
.sheet-lede { color: var(--bone-ash); }

.sheet-rows { margin-top: clamp(40px, 5vw, 66px); display: grid; gap: 0; }

.sheet-row {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
  padding: clamp(32px, 4vw, 48px) 0;
  border-top: 1px solid var(--bone-rule);
}
.sheet-row:last-child { border-bottom: 1px solid var(--bone-rule); }
.sheet-copy h3 { font-size: 1.25rem; margin-bottom: 14px; }
.sheet-copy p { color: var(--bone-ash); font-size: 0.95rem; margin-bottom: 12px; }
.sheet-copy p:last-child { margin-bottom: 0; }

.sheet .graph .st { color: var(--bone-rule); }
.sheet .graph .dm { color: var(--bone-ash); }
.sheet .graph .tx { color: var(--bone-ink); }
.sheet .graph .ac { color: var(--bone-ember); }

@media (max-width: 860px) {
  .sheet-row { grid-template-columns: 1fr; }
}

/* --------------------------------------------------------------------- cta */

.cta {
  position: relative;
  padding: clamp(72px, 9vw, 128px) 0;
  border-bottom: 1px solid var(--rule);
  background:
    radial-gradient(90% 120% at 50% 120%, rgba(255, 59, 18, 0.10), transparent 62%),
    var(--void);
}
.cta-in { text-align: center; display: grid; justify-items: center; }
.cta h2 { margin: 16px 0 16px; }
.cta p { color: var(--ash); max-width: 46ch; }
.cta .btn { margin-top: 32px; }
.cta-alt { font-family: var(--mono); font-size: 12px; color: var(--dim); margin-top: 18px !important; }
.cta-alt a { color: var(--ash); text-underline-offset: 3px; }
.cta-alt a:hover { color: var(--ember); }

/* ------------------------------------------------------------------ footer */

.foot { background: var(--void); padding-top: clamp(48px, 6vw, 72px); }
.foot-in {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 2fr);
  gap: clamp(32px, 5vw, 64px);
  padding-bottom: 48px;
}
.foot-brand p {
  margin-top: 16px;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.8;
  color: var(--dim);
  max-width: 26ch;
}
.foot-cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 28px; }
.foot-cols h3 {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 14px;
}
.foot-cols a {
  display: block;
  font-size: 0.9rem;
  color: var(--ash);
  text-decoration: none;
  padding: 5px 0;
}
.foot-cols a:hover { color: var(--snow); }

.foot-rule {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  border-top: 1px solid var(--rule);
  padding-top: 22px;
  padding-bottom: 34px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--dim);
}
.foot-sig { color: #34393F; letter-spacing: 0.12em; }

@media (max-width: 760px) {
  .foot-in { grid-template-columns: 1fr; }
}

/* --------------------------------------------------------------- animation */

[data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .6s ease, transform .6s ease;
}
[data-reveal].is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  .hero-field { display: none; }
}