:root {
  --bg: #111;
  --bg2: #0c0c0c;
  --text: #b8b8b8;
  --head: #ececec;
  --muted: #555;
  --border: #222;
  --code: #8db88d;
  --link: #6fa8c8;
  --pre-bg: #0c0c0c;
  --green: #65a865;
  --amber: #b09040;
  --dim: #3a3a3a;
  --max: 760px;
  --mono: Consolas, 'Cascadia Mono', 'Cascadia Code', 'Courier New', monospace;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover {
  color: var(--head);
  text-decoration: underline;
}

h1,
h2,
h3 {
  color: var(--head);
  font-family: var(--mono);
  font-weight: bold;
}

code {
  font-family: var(--mono);
  color: var(--code);
  font-size: 0.88em;
}

pre {
  background: var(--pre-bg);
  border-left: 2px solid var(--dim);
  padding: 0.9rem 1.1rem;
  overflow-x: auto;
  color: var(--text);
  font-size: 0.85rem;
  line-height: 1.6;
  font-family: var(--mono);
}

pre code {
  color: inherit;
}

/* nav */

header {
  border-bottom: 1px solid var(--border);
  padding: 0.85rem 0;
}

.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
}

.logo {
  font-size: 0.88rem;
  font-weight: bold;
  color: var(--head);
  text-decoration: none;
  letter-spacing: 0.04em;
}

.logo:hover {
  text-decoration: none;
  color: var(--head);
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  margin-left: auto;
}

.nav-links a {
  font-size: 0.8rem;
  color: var(--muted);
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--head);
  text-decoration: none;
}

.nav-links a.active {
  color: var(--text);
}

/* hero */

.hero {
  padding: 3.5rem 0 2.5rem;
}

.hero-title {
  font-size: 2.5rem;
  letter-spacing: 0.02em;
  margin-bottom: 1rem;
}

.hero-sub {
  font-size: 0.87rem;
  max-width: 480px;
  margin-bottom: 1.75rem;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.32rem 0.85rem;
  border: 1px solid var(--dim);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.8rem;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}

.btn:hover {
  border-color: var(--muted);
  color: var(--head);
  text-decoration: none;
}

/* sections */

.section {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
}

.sh {
  font-size: 0.7rem;
  font-weight: normal;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
}

/* two-column definition list */

.dl-row {
  display: grid;
  grid-template-columns: 185px 1fr;
  gap: 0.3rem 1.5rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.83rem;
  align-items: start;
}

.dl-row:last-child {
  border-bottom: none;
}

.dl-k {
  color: var(--head);
  line-height: 1.6;
}

.dl-v {
  color: var(--text);
  line-height: 1.7;
}

/* pipeline */

.pipe-list {
  list-style: none;
}

.pipe-list li {
  display: grid;
  grid-template-columns: 2.2rem 1fr auto;
  align-items: baseline;
  gap: 0 0.85rem;
  padding: 0.42rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.83rem;
}

.pipe-list li:last-child {
  border-bottom: none;
}

.pipe-n {
  color: var(--dim);
  font-size: 0.7rem;
}

.pipe-name {
  color: var(--head);
}

.pipe-desc {
  color: var(--muted);
  font-size: 0.74rem;
  text-align: right;
}

/* quick start */

.qs-block {
  margin-bottom: 1.75rem;
}

.qs-block:last-child {
  margin-bottom: 0;
}

.qs-label {
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.35rem;
}

/* page header */

.page-hdr {
  padding: 2.25rem 0 1.75rem;
  border-bottom: 1px solid var(--border);
}

.ph-trail {
  font-size: 0.7rem;
  color: var(--dim);
  margin-bottom: 0.4rem;
}

.page-hdr h1 {
  font-size: 1.4rem;
  margin-bottom: 0.3rem;
  letter-spacing: 0.02em;
}

.ph-sub {
  font-size: 0.8rem;
  color: var(--muted);
}

/* architecture sections */

.arch-section {
  padding: 1.75rem 0;
  border-top: 1px solid var(--border);
}

.arch-heading {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  flex-wrap: wrap;
  margin-bottom: 0.85rem;
  font-size: 0.83rem;
  font-weight: bold;
  color: var(--head);
  letter-spacing: 0.04em;
}

.arch-n {
  color: var(--dim);
  font-size: 0.7rem;
  font-weight: normal;
}

.arch-src {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: normal;
  margin-left: auto;
}

.arch-body {
  font-size: 0.83rem;
  color: var(--text);
  line-height: 1.75;
}

.arch-body p {
  margin-bottom: 0.7rem;
}

.arch-body p:last-child {
  margin-bottom: 0;
}

.arch-body ul {
  padding-left: 1.2rem;
  margin-bottom: 0.75rem;
}

.arch-body li {
  margin-bottom: 0.22rem;
  line-height: 1.65;
}

.arch-body pre {
  margin: 0.65rem 0;
}

.arch-body strong {
  color: var(--head);
  font-weight: bold;
}

.arch-body h3 {
  font-size: 0.74rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-weight: normal;
  margin: 1rem 0 0.4rem;
}

.arch-body h3:first-child {
  margin-top: 0;
}

/* subset table */

.feat-stats {
  font-size: 0.77rem;
  color: var(--muted);
  margin-bottom: 1.25rem;
}

.tbl-border {
  border: 1px solid var(--border);
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 0.81rem;
}

thead th {
  text-align: left;
  padding: 0.38rem 0.75rem;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: normal;
  background: var(--pre-bg);
}

tbody tr {
  border-bottom: 1px solid var(--border);
}

tbody tr:last-child {
  border-bottom: none;
}

tbody td {
  padding: 0.38rem 0.75rem;
  vertical-align: top;
}

td:nth-child(2) {
  white-space: nowrap;
  width: 65px;
}

.tbl-grp td {
  background: var(--pre-bg);
  color: var(--muted);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.28rem 0.75rem;
  border-top: 1px solid var(--border);
}

.s-impl {
  color: var(--green);
  font-size: 0.71rem;
}

.s-part {
  color: var(--amber);
  font-size: 0.71rem;
}

.s-todo {
  color: var(--dim);
  font-size: 0.71rem;
}

.s-note {
  display: block;
  font-size: 0.71rem;
  color: var(--muted);
  margin-top: 0.1rem;
}

/* roadmap */

.roadmap {
  list-style: none;
  margin-top: 1.75rem;
}

.roadmap li {
  position: relative;
  padding: 0.42rem 0 0.42rem 1.4rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--text);
}

.roadmap li:last-child {
  border-bottom: none;
}

.roadmap li::before {
  content: '-';
  position: absolute;
  left: 0.2rem;
  color: var(--dim);
}

/* footer */

footer {
  border-top: 1px solid var(--border);
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.4rem;
  font-size: 0.72rem;
  color: var(--muted);
}

footer a {
  color: var(--muted);
  text-decoration: none;
}

footer a:hover {
  color: var(--head);
}

/* responsive */

@media (max-width: 560px) {
  .dl-row {
    grid-template-columns: 1fr;
  }

  .pipe-list li {
    grid-template-columns: 2rem 1fr;
  }

  .pipe-desc {
    display: none;
  }

  .hero-title {
    font-size: 1.9rem;
  }

  .arch-src {
    margin-left: 0;
  }
}