:root {
  color-scheme: light;
  --bg: #eef1f3;
  --paper: #f9faf9;
  --ink: #151719;
  --muted: #5b636b;
  --line: #cfd5d9;
  --line-dark: #2b2f33;
  --accent: #2f8a57;
  --accent-soft: #dcefe4;
  --warn: #f2d47b;
  --warn-soft: #fff6d6;
  --good: #9dd6af;
  --good-soft: #e5f5e9;
  --code: #1f2428;
  --code-bg: #f0f2f3;
  --shadow: rgba(20, 24, 28, 0.14);
  font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(47, 138, 87, 0.08) 1px, transparent 1px),
    linear-gradient(rgba(47, 138, 87, 0.06) 1px, transparent 1px),
    var(--bg);
  background-size: 18px 18px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  padding: 36px clamp(18px, 4vw, 56px);
  background: var(--paper);
  border-bottom: 4px solid var(--line-dark);
  box-shadow: 0 5px 0 var(--shadow);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4.8rem);
  line-height: 0.95;
  letter-spacing: 0;
}

.lead {
  max-width: 760px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.55;
}

.version-card {
  align-self: start;
  min-width: 190px;
  padding: 16px;
  display: grid;
  gap: 6px;
  background: var(--accent-soft);
  border: 3px solid var(--line-dark);
  box-shadow: 5px 5px 0 var(--line-dark);
}

.version-card span {
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  font-weight: 700;
}

.version-card strong {
  font-size: 1rem;
}

.layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 24px;
  max-width: 1500px;
  margin: 0 auto;
  padding: 24px;
}

.sidebar {
  position: sticky;
  top: 16px;
  align-self: start;
  max-height: calc(100vh - 32px);
  overflow: auto;
  padding: 12px;
  background: var(--paper);
  border: 3px solid var(--line-dark);
  box-shadow: 4px 4px 0 var(--line-dark);
}

.sidebar a {
  display: block;
  padding: 8px 10px;
  color: var(--ink);
  text-decoration: none;
  border: 2px solid transparent;
  font-weight: 650;
}

.sidebar a:hover,
.sidebar a:focus {
  background: var(--accent-soft);
  border-color: var(--line-dark);
  outline: none;
}

.content {
  min-width: 0;
  display: grid;
  gap: 22px;
}

.panel {
  padding: clamp(18px, 3vw, 30px);
  background: var(--paper);
  border: 3px solid var(--line-dark);
  box-shadow: 5px 5px 0 var(--line-dark);
}

.panel h2 {
  margin: 0 0 14px;
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.panel h3 {
  margin: 24px 0 8px;
  font-size: 1.05rem;
}

.panel p,
.panel li {
  color: var(--muted);
  line-height: 1.65;
}

.panel p {
  margin: 0 0 14px;
}

.panel ul,
.panel ol {
  margin: 8px 0 0;
  padding-left: 22px;
}

.grid {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.mini {
  padding: 16px;
  background: #ffffff;
  border: 2px solid var(--line-dark);
}

.mini h3 {
  margin-top: 0;
}

.callout {
  margin: 16px 0;
  padding: 14px 16px;
  background: #ffffff;
  border: 2px solid var(--line-dark);
  border-left: 10px solid var(--accent);
}

.callout.good {
  background: var(--good-soft);
  border-left-color: var(--good);
}

.callout.warn {
  background: var(--warn-soft);
  border-left-color: var(--warn);
}

code {
  padding: 0.12em 0.35em;
  color: var(--code);
  background: var(--code-bg);
  border: 1px solid var(--line);
  font-family: "Cascadia Mono", "Consolas", monospace;
  font-size: 0.92em;
}

pre {
  overflow: auto;
  margin: 16px 0;
  padding: 16px;
  color: #f4f7f8;
  background: #1f2428;
  border: 3px solid var(--line-dark);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

pre code {
  padding: 0;
  color: inherit;
  background: transparent;
  border: 0;
  font-size: 0.88rem;
  line-height: 1.55;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  background: #ffffff;
  border: 3px solid var(--line-dark);
}

th,
td {
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
  border: 1px solid var(--line);
}

th {
  color: var(--ink);
  background: var(--accent-soft);
  border-bottom: 3px solid var(--line-dark);
}

td {
  color: var(--muted);
}

.diagram {
  margin: 18px 0;
}

.box {
  padding: 16px;
  border: 3px solid var(--line-dark);
  background: #ffffff;
}

.box strong,
.box span {
  display: block;
}

.box span {
  margin-top: 6px;
  color: var(--muted);
}

.box.desktop {
  background: #e7f3ec;
}

.box.session {
  margin-top: 16px;
  background: #f7f8f8;
}

.box.mod {
  margin-top: 16px;
  background: #fffdf3;
}

.footer {
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 24px 36px;
  color: var(--muted);
}

.footer p {
  padding: 16px;
  background: var(--paper);
  border: 3px solid var(--line-dark);
}

@media (max-width: 1050px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    max-height: none;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid.two,
  .grid.three {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .topbar {
    flex-direction: column;
    padding: 24px 16px;
  }

  .layout {
    padding: 16px;
  }

  .sidebar {
    grid-template-columns: 1fr;
  }

  table {
    display: block;
    overflow-x: auto;
  }
}

@media print {
  body {
    background: #ffffff;
  }

  .sidebar {
    display: none;
  }

  .layout {
    display: block;
    padding: 0;
  }

  .panel,
  .topbar,
  .footer p {
    box-shadow: none;
    border-color: #000000;
  }

  pre {
    white-space: pre-wrap;
  }
}