:root {
  --bg: #121614;
  --bg-code: #0c0f0d;
  --line: #2a332e;
  --text: #e6e8e3;
  --muted: #8d948c;
  --green: #8fbfa0;
  --gold: #c6a15b;
  --sans: "IBM Plex Sans", "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 1.05rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
}

a {
  color: var(--green);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: #c5dece;
}

code {
  font-family: var(--mono);
  font-size: 0.92em;
}

p code, li code, h3 code {
  color: var(--text);
}

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

.container {
  width: min(1040px, calc(100% - 48px));
  margin: 0 auto;
}

.narrow {
  width: min(720px, calc(100% - 48px));
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 60px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
}

.brand-logo {
  width: 28px;
  height: 28px;
  display: block;
}

.brand-text {
  color: var(--gold);
  font-weight: 500;
  letter-spacing: 0.01em;
}

.brand-version {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.8rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-nav a:hover {
  color: var(--text);
}

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  color: var(--text);
  font: inherit;
  padding: 6px 12px;
  cursor: pointer;
}

.hero {
  padding: 56px 0 24px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 48px;
  align-items: start;
}

h1, h2, h3 {
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

h1 {
  margin: 0 0 16px;
  font-size: clamp(2.4rem, 4vw, 3.1rem);
}

h2 {
  margin: 0 0 12px;
  font-size: 1.6rem;
}

h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

.lede {
  font-size: 1.12rem;
  color: var(--text);
}

.hero-copy p,
.section-intro {
  color: var(--muted);
}

.hero-copy p {
  margin: 0 0 16px;
}

.soon {
  margin: 28px 0 0;
  color: var(--muted);
}

.soon span {
  margin-right: 10px;
  color: var(--gold);
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
}

.copy {
  flex-shrink: 0;
  background: none;
  border: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.8rem;
  padding: 4px 8px;
  cursor: pointer;
}

.copy:hover {
  color: var(--text);
  border-color: #3d4a42;
}

.code-block {
  margin: 0;
  background: var(--bg-code);
  border: 1px solid var(--line);
}

.code-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.8rem;
}

.code-block pre {
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.86rem;
  line-height: 1.6;
  color: #d7ddd4;
}

.tok-kw { color: #8fbfa0; }
.tok-str { color: #c3b59a; }
.tok-comment { color: #6d766f; font-style: italic; }

.section {
  padding: 64px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 60px;
}

.section-intro {
  margin: 0 0 28px;
  max-width: 68ch;
}

.rule {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(220px, 0.8fr);
  gap: 32px;
  align-items: start;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.rule p {
  margin: 0;
  color: var(--muted);
}

.rule pre {
  margin: 0;
  padding: 14px 16px;
  background: var(--bg-code);
  border: 1px solid var(--line);
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.84rem;
  line-height: 1.55;
  color: #d7ddd4;
}

.tour-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.tour-tab {
  background: none;
  border: 1px solid var(--line);
  color: var(--muted);
  font: inherit;
  font-size: 0.92rem;
  padding: 6px 12px;
  cursor: pointer;
}

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

.tour-tab.active {
  color: var(--text);
  border-color: #3d4a42;
  background: #1a211d;
}

.tour-copy {
  margin-bottom: 16px;
  max-width: 68ch;
}

.tour-copy p {
  margin: 0;
  color: var(--muted);
}

.bench-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 36px;
  font-variant-numeric: tabular-nums;
}

.bench-table caption {
  caption-side: bottom;
  padding-top: 10px;
  text-align: left;
  color: var(--muted);
  font-size: 0.9rem;
}

.bench-table th,
.bench-table td {
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  text-align: left;
  font-weight: 400;
}

.bench-table .num {
  text-align: right;
  font-family: var(--mono);
  font-size: 0.95rem;
}

.chart-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.chart {
  display: block;
  width: 100%;
  padding: 0;
  background: var(--bg-code);
  border: 1px solid var(--line);
  color: var(--muted);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.chart:hover {
  border-color: #3d4a42;
}

.chart img {
  display: block;
  width: 100%;
  height: auto;
}

.chart span {
  display: block;
  padding: 10px 12px;
  font-size: 0.9rem;
}

.plain-list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.plain-list li {
  padding: 12px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: baseline;
}

.site-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
}

.footer-nav a:hover {
  color: var(--text);
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(0, 0, 0, 0.86);
}

.modal[hidden] {
  display: none;
}

.modal-dialog {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  max-width: min(1100px, 100%);
  max-height: 90vh;
}

.modal-dialog img {
  display: block;
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  background: var(--bg-code);
  border: 1px solid var(--line);
}

.modal-close {
  background: var(--bg);
  border: 1px solid var(--line);
  color: var(--text);
  font: inherit;
  padding: 4px 10px;
  cursor: pointer;
}

@media (max-width: 860px) {
  .hero-grid,
  .rule,
  .chart-grid {
    grid-template-columns: 1fr;
  }

  .menu-toggle {
    display: block;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    padding: 16px 24px 20px;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
  }

  .site-nav.open {
    display: flex;
  }

  .footer-inner {
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .container,
  .narrow {
    width: min(1040px, calc(100% - 32px));
  }
}