:root {
  --ink: #17130f;
  --paper: #f7f2e8;
  --white: #fffdf8;
  --clay: #b9472f;
  --moss: #526f4a;
  --gold: #c9972d;
  --teal: #1c7671;
  --line: rgba(23, 19, 15, 0.16);
  --shadow: 0 24px 68px rgba(23, 19, 15, 0.15);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(23, 19, 15, 0.04) 1px, transparent 1px),
    linear-gradient(180deg, rgba(23, 19, 15, 0.04) 1px, transparent 1px),
    var(--paper);
  background-size: 42px 42px;
  font-family: "IBM Plex Sans", Verdana, sans-serif;
}

a {
  color: var(--clay);
  font-weight: 800;
}

.reader-topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px clamp(18px, 4vw, 56px);
  border-bottom: 1px solid var(--line);
  background: rgba(247, 242, 232, 0.94);
  backdrop-filter: blur(14px);
}

.reader-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
}

.reader-brand span {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  background: var(--ink);
  color: var(--paper);
  font-family: "Newsreader", Georgia, serif;
  font-size: 22px;
  font-weight: 700;
}

.reader-topbar nav {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 14px;
}

.reader-topbar nav a {
  color: var(--ink);
  text-decoration: none;
}

.reader-topbar button,
.reader-nav-link {
  border: 1px solid var(--ink);
  background: var(--white);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  font-weight: 800;
}

.reader-topbar button {
  min-height: 38px;
  padding: 9px 12px;
}

.reader-shell {
  display: grid;
  grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
  gap: clamp(22px, 4vw, 54px);
  align-items: start;
  padding: clamp(28px, 5vw, 70px) clamp(18px, 5vw, 76px);
}

.reader-sidebar {
  position: sticky;
  top: 84px;
  max-height: calc(100vh - 108px);
  overflow: auto;
  padding: 22px;
  border: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.76);
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--clay);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.reader-nav-link {
  display: block;
  width: 100%;
  margin: 0 0 10px;
  padding: 12px 13px;
  text-align: left;
  text-decoration: none;
}

.reader-nav-link span {
  display: block;
  color: rgba(23, 19, 15, 0.56);
  font-size: 11px;
  text-transform: uppercase;
}

.reader-nav-link.active {
  background: var(--ink);
  color: var(--white);
}

.reader-nav-link.active span {
  color: rgba(255, 253, 248, 0.62);
}

.reader-paper {
  min-height: 76vh;
  padding: clamp(28px, 6vw, 74px);
  border: 1px solid var(--line);
  background: var(--white);
  box-shadow: var(--shadow);
}

.reader-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: space-between;
  margin-bottom: 30px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  color: rgba(23, 19, 15, 0.62);
  font-size: 14px;
  font-weight: 800;
}

.markdown-body {
  font-size: 18px;
  line-height: 1.68;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3 {
  font-family: "Newsreader", Georgia, serif;
  line-height: 1.02;
}

.markdown-body h1 {
  margin: 0 0 26px;
  font-size: clamp(46px, 7vw, 88px);
}

.markdown-body h2 {
  margin: 42px 0 16px;
  font-size: clamp(30px, 4vw, 50px);
}

.markdown-body h3 {
  margin: 30px 0 10px;
  font-size: 28px;
}

.markdown-body p,
.markdown-body li {
  max-width: 820px;
}

.markdown-body blockquote {
  margin: 30px 0;
  padding: 22px 26px;
  border-left: 6px solid var(--clay);
  background: #f2e0d5;
  font-family: "Newsreader", Georgia, serif;
  font-size: 26px;
  line-height: 1.28;
}

.markdown-body table {
  width: 100%;
  margin: 26px 0;
  border-collapse: collapse;
  font-size: 15px;
}

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

.markdown-body th {
  background: #e8efe4;
}

.markdown-body code {
  padding: 2px 5px;
  background: #efe5d6;
}

.markdown-body pre {
  overflow: auto;
  padding: 18px;
  background: var(--ink);
  color: var(--white);
}

.pdf-frame {
  width: 100%;
  min-height: 76vh;
  border: 1px solid var(--line);
  background: var(--white);
}

.csv-scroll {
  overflow: auto;
}

@media (max-width: 900px) {
  .reader-topbar,
  .reader-topbar nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .reader-shell {
    grid-template-columns: 1fr;
  }

  .reader-sidebar {
    position: static;
    max-height: 40vh;
  }

  .reader-paper {
    padding: 24px 18px;
  }
}