:root {
  --paper: #f3efe6;
  --ink: #221c16;
  --soft: #5e564c;
  --line: #d9d0c2;
  --seal: #8d322c;
  --device: #fafafa;
  --device-ink: #18181b;
  --device-line: #e4e4e7;
  --device-muted: #71717a;
  --focus: #8d322c;
  color-scheme: light;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    linear-gradient(90deg, transparent 31px, rgba(141, 50, 44, 0.35) 32px, transparent 33px),
    var(--paper);
  color: var(--ink);
  font-family: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", Palatino, "Palatino Linotype", serif;
  font-size: 18px;
  line-height: 1.65;
}

a { color: inherit; }

.mast {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 28px 40px 18px 56px;
  border-bottom: 1px solid var(--ink);
}

.mark {
  font-size: 20px;
  letter-spacing: 0.18em;
  text-decoration: none;
}

.mast nav {
  display: flex;
  gap: 22px;
  font-size: 15px;
}

.mast a { text-underline-offset: 4px; }

.mast nav a:hover { color: var(--seal); }

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 40px 80px 56px;
}

.cover {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 48px;
  align-items: start;
  padding: 48px 0 64px;
  border-bottom: 1px solid var(--line);
}

.kicker {
  margin: 0 0 18px;
  color: var(--seal);
  font-size: 14px;
  letter-spacing: 0.16em;
}

h1 {
  margin: 0;
  font-size: 52px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.lede {
  margin: 22px 0 0;
  max-width: 38em;
  color: var(--soft);
}

.cover-meta {
  margin: 28px 0 0;
  font-size: 15px;
}

.mono, .device, .device button, .device input {
  font-family: "SFMono-Regular", "SF Mono", "Sarasa Mono SC", "Noto Sans Mono", ui-monospace, monospace;
}

.device {
  background: var(--device);
  color: var(--device-ink);
  border: 1px solid #c8c8cc;
  box-shadow: 8px 12px 0 rgba(34, 28, 22, 0.08);
  font-size: 12px;
  line-height: 1.4;
}

.device-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 14px;
  border-bottom: 1px solid var(--device-line);
}

.device-bar span { color: var(--device-muted); }

.filters {
  display: flex;
  gap: 4px;
  padding: 8px 10px;
  border-bottom: 1px solid var(--device-line);
  overflow-x: auto;
}

.filters button, .eye {
  border: 0;
  background: transparent;
  color: var(--device-muted);
  cursor: pointer;
  padding: 4px 6px;
}

.filters button.on {
  color: var(--device-ink);
  box-shadow: inset 0 -1px 0 var(--device-ink);
}

.filters button:focus-visible, .eye:focus-visible, .mast a:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.rows {
  list-style: none;
  margin: 0;
  padding: 0;
  min-height: 168px;
}

.rows button {
  width: 100%;
  text-align: left;
  border: 0;
  border-bottom: 1px solid var(--device-line);
  background: transparent;
  padding: 10px 14px;
  cursor: pointer;
  font: inherit;
}

.rows button.on { background: #f4f4f5; }

.rows small {
  display: block;
  color: var(--device-muted);
  margin-top: 2px;
}

.detail {
  padding: 12px 14px 16px;
  display: grid;
  gap: 8px;
}

.detail label {
  display: grid;
  gap: 4px;
  color: var(--device-muted);
}

.field {
  display: flex;
  align-items: center;
  border: 1px solid var(--device-line);
  background: white;
}

.detail input {
  width: 100%;
  border: 0;
  background: transparent;
  padding: 7px 8px;
  font: inherit;
  color: var(--device-ink);
}

.eye { padding: 0 8px; font-size: 14px; line-height: 1; }

section { padding-top: 56px; }

h2 {
  display: flex;
  gap: 14px;
  align-items: baseline;
  margin: 0 0 22px;
  font-size: 28px;
  font-weight: 600;
}

h2 span {
  color: var(--seal);
  font-size: 14px;
  letter-spacing: 0.12em;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 16px;
}

th, td {
  text-align: left;
  vertical-align: top;
  padding: 12px 16px 12px 0;
  border-top: 1px solid var(--line);
}

th {
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.08em;
}

.modes, .install {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

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

h3 {
  margin: 0 0 8px;
  font-size: 20px;
}

.modes p, .install li, .steps li { color: var(--soft); }

.download {
  color: var(--seal);
  text-underline-offset: 4px;
}

.install p { margin: 0 0 12px; }

.modes p { margin: 0; }

.steps, .install ol {
  margin: 0;
  padding-left: 1.2em;
}

.steps li + li, .install li + li { margin-top: 8px; }

.aside {
  margin: 22px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--seal);
}

footer {
  border-top: 1px solid var(--ink);
  max-width: 1080px;
  margin: 0 auto;
  padding: 18px 40px 28px 56px;
  font-size: 14px;
  color: var(--soft);
}

@media (max-width: 860px) {
  body { background: var(--paper); }
  .mast, main, footer { padding-left: 20px; padding-right: 20px; }
  .cover, .modes, .install { grid-template-columns: 1fr; }
  h1 { font-size: 36px; }
  .device { max-width: 380px; }
}