:root {
  --ink: #0e1a1d;
  --ink-deep: #081113;
  --panel: #142428;
  --panel-2: #182a2e;
  --border: #24393d;
  --border-soft: #1c3134;
  --porcelain: #ece6d8;
  --porcelain-dim: #9fadab;
  --porcelain-faint: #6c7e7c;
  --brass: #c68b44;
  --brass-bright: #e4ae68;
  --steam: #74a69e;
  --steam-dim: #3f5d58;
  --clay: #b15a3e;
  --code-bg: #0a1416;
  --font-display: "IBM Plex Mono", ui-monospace, monospace;
  --font-body: "IBM Plex Sans", system-ui, sans-serif;
  --maxw: 1080px;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--ink);
  color: var(--porcelain);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
::selection {
  background: var(--brass);
  color: var(--ink-deep);
}
a {
  color: var(--brass-bright);
}
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--brass-bright);
  outline-offset: 3px;
}
.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(14, 26, 29, 0.82);
  border-bottom: 1px solid var(--border-soft);
}
.nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--porcelain);
  text-decoration: none;
  font-size: 15px;
}
.brand img {
  display: block;
}
.brand .tag {
  color: var(--porcelain-faint);
  font-weight: 400;
  font-size: 12px;
  border-left: 1px solid var(--border);
  padding-left: 10px;
  margin-left: 2px;
}
.navlinks {
  display: flex;
  gap: 28px;
  font-family: var(--font-display);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.navlinks a {
  color: var(--porcelain-dim);
  text-decoration: none;
  transition: color 0.15s ease;
}
.navlinks a:hover {
  color: var(--brass-bright);
}
.hero {
  padding: 76px 0 40px;
  position: relative;
  overflow: hidden;
}
.hero:before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
      600px 300px at 15% -10%,
      rgba(198, 139, 68, 0.1),
      transparent 60%
    ),
    radial-gradient(
      500px 260px at 90% 0%,
      rgba(116, 166, 158, 0.1),
      transparent 60%
    );
  pointer-events: none;
}
.badges {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 22px;
  position: relative;
}
.badge {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 5px 10px;
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--porcelain-dim);
  background: rgba(255, 255, 255, 0.02);
}
.badge.brass {
  border-color: rgba(198, 139, 68, 0.5);
  color: var(--brass-bright);
}
.hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(34px, 5.2vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0 0 20px;
  max-width: 15ch;
  position: relative;
}
.hero h1 em {
  font-style: normal;
  color: var(--brass-bright);
}
.hero p.lead {
  font-size: 17px;
  color: var(--porcelain-dim);
  max-width: 56ch;
  margin: 0 0 32px;
  position: relative;
}
.cta-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 56px;
  position: relative;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.03em;
  text-decoration: none;
  padding: 12px 20px;
  border-radius: 3px;
  transition: transform 0.15s ease, background 0.15s ease,
    border-color 0.15s ease;
}
.btn.primary {
  background: var(--brass);
  color: var(--ink-deep);
  font-weight: 600;
}
.btn.primary:hover {
  background: var(--brass-bright);
  transform: translateY(-1px);
}
.btn.ghost {
  border: 1px solid var(--border);
  color: var(--porcelain);
}
.btn.ghost:hover {
  border-color: var(--steam);
}
.schematic-wrap {
  border: 1px solid var(--border-soft);
  border-radius: 6px;
  background: linear-gradient(180deg, var(--panel), var(--ink-deep));
  padding: 28px 20px 18px;
  position: relative;
}
.schematic-label {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--porcelain-faint);
  margin-bottom: 14px;
  display: flex;
  justify-content: space-between;
}
.dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--steam);
  margin-right: 6px;
  box-shadow: 0 0 8px var(--steam);
}
svg.pipeline {
  width: 100%;
  height: auto;
  display: block;
}
.flow-line {
  stroke: var(--brass);
  stroke-width: 2;
  fill: none;
  stroke-dasharray: 6 7;
  animation: flow 1.4s linear infinite;
}
.flow-line.pending {
  stroke: var(--border);
  animation: none;
  stroke-dasharray: 3 6;
}
@keyframes flow {
  to {
    stroke-dashoffset: -26;
  }
}
.node-ring {
  fill: var(--panel-2);
  stroke: var(--brass);
  stroke-width: 1.6;
}
.node-ring.pending {
  stroke: var(--border);
}
.node-ring.progress {
  stroke: var(--steam);
}
.node-label {
  font-family: var(--font-display);
  font-size: 11px;
  fill: var(--porcelain);
  text-anchor: middle;
}
.node-sub {
  font-family: var(--font-display);
  font-size: 8.5px;
  fill: var(--porcelain-faint);
  text-anchor: middle;
  letter-spacing: 0.04em;
}
section {
  padding: 64px 0;
}
section.alt {
  background: var(--panel);
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
}
.eyebrow {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--steam);
  margin: 0 0 10px;
}
h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(24px, 3.2vw, 32px);
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}
.section-lead,
.dim {
  color: var(--porcelain-dim);
  max-width: 62ch;
  margin: 0 0 36px;
}
.two-col {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 44px;
  align-items: start;
}
.fact-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.fact-list li {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 14px;
  font-size: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-soft);
}
.fact-list li:last-child {
  border-bottom: none;
}
.fact-list .k {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--porcelain-faint);
}
.fact-list .v {
  color: var(--porcelain-dim);
}
code {
  color: var(--brass-bright);
}
.code-card {
  border: 1px solid var(--border-soft);
  border-radius: 6px;
  overflow: hidden;
  background: var(--code-bg);
}
.code-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--border-soft);
  font-family: var(--font-display);
  font-size: 11.5px;
  color: var(--porcelain-faint);
  letter-spacing: 0.03em;
}
.dots {
  display: flex;
  gap: 6px;
}
.dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
}
pre.code {
  margin: 0;
  padding: 20px 22px;
  overflow-x: auto;
  font-family: var(--font-display);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--porcelain);
}
.k {
  color: var(--brass-bright);
}
.ty {
  color: var(--steam);
}
.st {
  color: #c7b27e;
}
.nm {
  color: var(--clay);
}
.cm {
  color: var(--porcelain-faint);
  font-style: italic;
}
.id {
  color: var(--porcelain);
}
.op {
  color: var(--porcelain-dim);
}
.stage-list {
  display: grid;
  gap: 14px;
  margin-top: 8px;
}
.stage {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  padding: 18px 20px;
  border: 1px solid var(--border-soft);
  border-radius: 6px;
  background: var(--panel-2);
}

.stage > div:nth-child(2) {
  min-width: 0;
}

.stage h3,
.stage p {
  overflow-wrap: break-word;
  word-wrap: break-word;
}
.status {
  font-family: var(--font-display);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 20px;
  white-space: nowrap;
  border: 1px solid transparent;
}
.status.done {
  color: var(--ink-deep);
  background: var(--brass-bright);
}
.status.progress {
  color: var(--steam);
  border-color: var(--steam);
}
.status.planned {
  color: var(--porcelain-faint);
  border-color: var(--border);
}
.types-wrap {
  overflow-x: auto;
}
table.types {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  margin-top: 8px;
}
table.types th {
  text-align: left;
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--porcelain-faint);
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}
table.types td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-soft);
  color: var(--porcelain-dim);
  font-family: var(--font-display);
  font-size: 12.5px;
}
table.types td.cat {
  font-family: var(--font-body);
  color: var(--porcelain);
}
table.types tr:last-child td {
  border-bottom: none;
}
.m {
  color: var(--brass-bright) !important;
}
.c {
  color: var(--steam) !important;
}
.faint {
  color: var(--porcelain-faint) !important;
}
.note {
  margin-top: 20px;
  padding: 14px 16px;
  border-left: 2px solid var(--steam);
  background: rgba(116, 166, 158, 0.06);
  font-size: 13.5px;
  color: var(--porcelain-dim);
}
.status-grid {
  margin-top: 28px;
}
footer {
  padding: 48px 0 40px;
  border-top: 1px solid var(--border-soft);
}
footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 24px;
}
footer .fbrand {
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--porcelain-dim);
  max-width: 40ch;
}
footer .fbrand strong {
  color: var(--porcelain);
}
footer .flinks {
  display: flex;
  gap: 22px;
  font-family: var(--font-display);
  font-size: 12.5px;
}
footer .flinks a {
  color: var(--porcelain-dim);
  text-decoration: none;
}
footer .flinks a:hover {
  color: var(--brass-bright);
}
footer .fine {
  margin-top: 28px;
  font-size: 12px;
  color: var(--porcelain-faint);
}
.stage h3 {
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.3;
  font-weight: 600;
  color: var(--porcelain);
  margin: 0 0 8px;
}

.stage p {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.65;
  font-weight: 400;
  color: var(--porcelain-dim);
  margin: 0;
}

.stage .idx {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  color: var(--brass-bright);
}
@media (max-width: 800px) {
  .two-col {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 720px) {
  .navlinks {
    display: none;
  }
}

@media (max-width: 620px) {
  .wrap {
    padding: 0 18px;
  }

  section {
    padding: 48px 0;
  }

  .stage-list {
    gap: 16px;
  }

  .stage {
    display: grid;
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 14px;
    padding: 20px 18px;
    align-items: start;
  }

  .stage .idx {
    width: 36px;
    height: 36px;
    font-size: 15px;
  }

  .stage h3 {
    font-size: 18px;
    line-height: 1.3;
    margin: 0 0 8px;
  }

  .stage p {
    font-size: 15px;
    line-height: 1.65;
  }

  .stage .status {
    grid-column: 2;
    justify-self: start;
    margin-top: 8px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .flow-line {
    animation: none;
  }
}
.semantic-label {
  font-size: 9px;
}

.semantic-sub {
  font-size: 7px;
}
.schematic-wrap {
  border: 1px solid var(--border-soft);
  border-radius: 6px;
  background: linear-gradient(180deg, var(--panel), var(--ink-deep));
  padding: 28px 20px 18px;
  position: relative;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

svg.pipeline {
  width: 100%;
  height: auto;
  display: block;
}

@media (max-width: 720px) {
  svg.pipeline {
    width: auto;
    min-width: 640px; /* stops it shrinking below a readable size */
    height: auto;
  }

  .schematic-label {
    flex-wrap: wrap;
    gap: 4px;
  }
}

/* =========================================================
   Interactive Compiler Playground
   ========================================================= */

.compiler-preview {
  margin-top: 2.5rem;
  border: 1px solid var(--border);
  background: var(--panel);
  overflow: hidden;
}

.preview-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--panel-2);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
}

.preview-kicker {
  color: var(--porcelain);
  font-weight: 600;
  letter-spacing: 0.08em;
}

.preview-status {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--porcelain-dim);
}

.preview-status i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  display: inline-block;
}

.editor-label {
  display: block;
  padding: 0.75rem 1rem 0.45rem;
  color: var(--porcelain-dim);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
}

.compiler-preview textarea {
  display: block;
  width: 100%;
  min-height: 230px;
  box-sizing: border-box;
  resize: vertical;
  border: 0;
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  outline: none;
  padding: 1rem;
  background: var(--ink-deep);
  color: var(--porcelain);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.85rem;
  line-height: 1.7;
  tab-size: 4;
}

.compiler-preview textarea:focus {
  box-shadow: inset 0 0 0 1px var(--border);
}

.compiler-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.preview-button {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--porcelain);
  color: var(--ink);
  padding: 0.55rem 1rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
}

.preview-button:hover {
  opacity: 0.9;
}

.preview-button:disabled {
  opacity: 0.5;
  cursor: wait;
}

.compile-stage {
  color: var(--porcelain-dim);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
}

.compiler-tabs {
  display: flex;
  overflow-x: auto;
  border-bottom: 1px solid var(--border);
  background: var(--panel-2);
}

.compiler-tab {
  appearance: none;
  border: 0;
  border-right: 1px solid var(--border);
  padding: 0.75rem 1rem;
  background: transparent;
  color: var(--porcelain-dim);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  cursor: pointer;
  white-space: nowrap;
}

.compiler-tab:hover {
  color: var(--porcelain);
}

.compiler-tab.active {
  background: var(--panel);
  color: var(--porcelain);
  box-shadow: inset 0 -2px 0 var(--porcelain);
}

.compiler-output {
  margin: 0;
  min-height: 180px;
  max-height: 500px;
  overflow: auto;
  padding: 1rem;
  box-sizing: border-box;
  background: var(--ink-deep);
  color: var(--porcelain);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
  line-height: 1.6;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.compiler-output.error {
  color: #d98f8f;
}

.symbol-table-output {
  padding: 0;
  overflow-x: auto;
}

.compiler-output table {
  width: 100%;
  border-collapse: collapse;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
}

.compiler-output th,
.compiler-output td {
  padding: 0.65rem 0.8rem;
  border-bottom: 1px solid var(--border-soft);
  text-align: left;
  vertical-align: top;
}

.compiler-output th {
  color: var(--porcelain);
  background: var(--panel-2);
  font-weight: 600;
}

.compiler-output td {
  color: var(--porcelain-dim);
}

.token-type {
  color: var(--porcelain);
}

.ast-tree {
  margin: 0;
  padding-left: 0;
  list-style: none;
}

.ast-tree ul {
  margin: 0;
  padding-left: 1.2rem;
  list-style: none;
}

.ast-tree li {
  margin: 0;
}

.ast-row {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  min-height: 1.5rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.74rem;
}

.ast-branch {
  color: var(--porcelain-faint);
  user-select: none;
}

.ast-row strong {
  color: var(--porcelain);
  font-weight: 500;
}

.ast-value {
  color: var(--porcelain-dim);
}

#playground .note {
  margin-top: 1.25rem;
}

#playground .note strong {
  color: var(--porcelain);
}


/* =========================================================
   Responsive compiler playground
   ========================================================= */

@media (max-width: 700px) {

  .preview-toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .compiler-preview textarea {
    min-height: 200px;
    font-size: 0.78rem;
  }

  .compiler-actions {
    align-items: flex-start;
    flex-direction: column;
  }

  .compiler-tabs {
    scrollbar-width: thin;
  }

  .compiler-output {
    font-size: 0.68rem;
  }

}
footer .fine {
  display: block;
  margin-top: 28px;
  font-size: 12px;
  color: var(--porcelain-faint);
}

footer .fine p {
  margin: 0;
}

footer .fine p + p {
  margin-top: 4px;
}