.reader-shell {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 22px;
  padding: 24px clamp(16px, 3vw, 42px) 58px;
}

.reader-aside {
  position: sticky;
  top: 78px;
  height: calc(100vh - 96px);
  overflow: auto;
  padding-right: 10px;
}

.reader-tab,
.toc a {
  display: block;
  padding: 7px 9px;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--muted);
  text-decoration: none;
}

.reader-tab:hover,
.toc a:hover {
  background: var(--panel);
  border-color: var(--line);
  color: var(--ink);
}

.toc {
  margin-top: 18px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
  font-size: 12px;
}

.reader-card {
  max-width: 1040px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.reader-status {
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}

.markdown-body {
  padding: clamp(20px, 3vw, 36px);
  font-size: 14px;
}

.markdown-body h1,
.markdown-body h2 {
  font-family: "Aptos Display", "Segoe UI", ui-sans-serif, system-ui, sans-serif;
}

.markdown-body h1 {
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.08;
}

.markdown-body h2 {
  margin-top: 34px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 22px;
}

.markdown-body h3 {
  margin-top: 24px;
  font-size: 17px;
}

.markdown-body p,
.markdown-body li {
  color: var(--muted);
}

.markdown-body pre {
  position: relative;
  overflow: auto;
  margin: 14px 0;
  padding: 14px 14px 14px 16px;
  border: 1px solid #39413f;
  border-radius: 7px;
  background: #0b0f10;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.markdown-body pre code {
  display: block;
  min-width: max-content;
  padding: 0;
  border-radius: 0;
  background: transparent;
  color: #dce7df;
  font: 12.5px/1.62 "Cascadia Mono", "Consolas", monospace;
  white-space: pre;
}

.markdown-body :not(pre) > code {
  border: 1px solid #354142;
  background: #1e282a;
  color: #f0b475;
  font: 0.92em "Cascadia Mono", "Consolas", monospace;
}

.copy-code {
  position: absolute;
  top: 8px;
  right: 8px;
  min-height: 28px;
  border: 1px solid #3b4949;
  border-radius: 6px;
  background: #172022;
  color: #dce7df;
  font: 12px "Aptos", "Segoe UI", sans-serif;
  cursor: pointer;
}

.copy-code:hover {
  background: #233032;
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
  font-size: 12.5px;
}

.markdown-body th,
.markdown-body td {
  border-bottom: 1px solid var(--line);
  padding: 8px 9px;
  text-align: left;
  vertical-align: top;
}