*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #1a1510;
  --bg-sidebar: #141010;
  --bg-content: #1e1914;
  --text: #d4c8b0;
  --text-muted: #8a7e6a;
  --accent: #c9a84c;
  --accent-dim: #6b5a2a;
  --border: #2e2620;
  --link: #d4a844;
  --hover: #251e16;
  --active: #2a2218;
  --scrollbar-thumb: #5a4a30;
  --font-body: 'Macondo', serif;
  --font-heading: 'Eagle Lake', serif;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
}

#app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* --- Sidebar --- */

#sidebar {
  width: 280px;
  min-width: 280px;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#sidebar-header {
  padding: 20px 16px 12px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.03em;
  cursor: pointer;
}

#sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}

#sidebar-nav::-webkit-scrollbar { width: 6px; }
#sidebar-nav::-webkit-scrollbar-track { background: transparent; }
#sidebar-nav::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 3px; }

.nav-section { margin-bottom: 4px; }

.nav-section-label {
  padding: 8px 16px 4px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-section-label::before {
  content: '';
  display: inline-block;
  width: 0; height: 0;
  border-left: 4px solid var(--text-muted);
  border-top: 3px solid transparent;
  border-bottom: 3px solid transparent;
  transition: transform 0.15s ease;
}

.nav-section.open > .nav-section-label::before {
  transform: rotate(90deg);
}

.nav-section-items { display: none; }
.nav-section.open > .nav-section-items { display: block; }

.nav-item {
  display: block;
  padding: 4px 16px 4px 28px;
  font-size: 14px;
  color: var(--text-muted);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.1s, color 0.1s;
  border-left: 2px solid transparent;
}

.nav-item:hover {
  background: var(--hover);
  color: var(--text);
}

.nav-item.active {
  background: var(--active);
  color: var(--accent);
  border-left-color: var(--accent);
}

/* --- Content --- */

#content {
  flex: 1;
  overflow-y: auto;
  background: var(--bg-content);
}

#content::-webkit-scrollbar { width: 8px; }
#content::-webkit-scrollbar-track { background: transparent; }
#content::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 4px; }

#content-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 48px 80px;
}

/* --- Rendered markdown --- */

#content-inner h1 {
  font-family: var(--font-heading);
  font-size: 2em;
  color: var(--accent);
  margin: 0 0 0.6em;
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--border);
  line-height: 1.3;
}

#content-inner h2 {
  font-family: var(--font-heading);
  font-size: 1.5em;
  color: var(--accent);
  margin: 1.4em 0 0.5em;
  line-height: 1.3;
}

#content-inner h3 {
  font-family: var(--font-heading);
  font-size: 1.17em;
  color: var(--text);
  margin: 1.2em 0 0.4em;
}

#content-inner h4 {
  font-family: var(--font-heading);
  font-size: 1em;
  color: var(--text);
  margin: 1em 0 0.3em;
  font-style: italic;
}

#content-inner p { margin: 0 0 0.8em; }
#content-inner strong { color: var(--text); font-weight: 600; }
#content-inner em { color: var(--text-muted); font-style: italic; }
#content-inner ul, #content-inner ol { margin: 0 0 0.8em 1.4em; }
#content-inner li { margin-bottom: 0.2em; }

#content-inner code {
  font-family: 'SF Mono', 'Fira Code', Menlo, monospace;
  font-size: 0.88em;
  background: rgba(201, 168, 76, 0.1);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  color: var(--accent);
}

#content-inner pre {
  background: #151010;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 16px;
  overflow-x: auto;
  margin: 0 0 1em;
}

#content-inner pre code { background: none; padding: 0; }

#content-inner blockquote {
  border-left: 3px solid var(--accent-dim);
  padding: 0.4em 0 0.4em 1em;
  margin: 0 0 0.8em;
  color: var(--text-muted);
}

#content-inner hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.5em 0;
}

#content-inner table {
  border-collapse: collapse;
  margin: 0 0 1em;
  width: 100%;
  font-size: 0.92em;
}

#content-inner th, #content-inner td {
  border: 1px solid var(--border);
  padding: 6px 10px;
  text-align: left;
}

#content-inner th {
  background: rgba(201, 168, 76, 0.08);
  color: var(--accent);
  font-weight: 600;
}

#content-inner a { color: var(--link); text-decoration: none; }
#content-inner a:hover { text-decoration: underline; }

.loading { color: var(--text-muted); font-style: italic; padding: 40px 0; }
.error { color: #b85c4c; padding: 40px 0; }

.content-image {
  float: right;
  max-width: 320px;
  height: auto;
  margin-left: 24px;
  margin-bottom: 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  background: var(--bg-sidebar);
}

/* --- Introduction page parchment theme (matches forboc.ai hero) --- */

#content.page-introduction {
  background:
    radial-gradient(circle at 15% 18%, rgba(255, 243, 194, 0.82), transparent 20%),
    radial-gradient(circle at 75% 24%, rgba(207, 233, 220, 0.62), transparent 24%),
    linear-gradient(180deg, rgba(255, 250, 240, 0.95) 0%, rgba(244, 234, 215, 0.85) 100%);
}

#content.page-introduction #content-inner { color: #3a3020; }
#content.page-introduction #content-inner h1 { color: #2d4a2e; border-bottom-color: #c9a84c; }
#content.page-introduction #content-inner h2 { color: #2d4a2e; }
#content.page-introduction #content-inner h3 { color: #3a3020; }
#content.page-introduction #content-inner em { color: #5a4e3a; }
#content.page-introduction #content-inner strong { color: #2d4a2e; }
#content.page-introduction #content-inner a { color: #7a5a1a; }
#content.page-introduction #content-inner blockquote { color: #5a4e3a; border-left-color: #c9a84c; }

#content.page-introduction img.content-image[src*="Lanternbough.png"] {
  -webkit-mask-image: radial-gradient(circle at center, black 55%, transparent 75%);
  mask-image: radial-gradient(circle at center, black 55%, transparent 75%);
  mix-blend-mode: multiply;
  opacity: 0.9;
  filter: contrast(1.05) saturate(1.1);
  border: none;
  box-shadow: none;
  border-radius: 0;
  background: none;
}

@media (max-width: 600px) {
  .content-image {
    float: none;
    display: block;
    margin: 0 auto 20px;
    max-width: 100%;
  }
}

/* --- Mobile --- */

#menu-toggle {
  display: none;
  position: fixed;
  top: 12px; left: 12px;
  z-index: 100;
  background: var(--bg-sidebar);
  border: 1px solid var(--border);
  color: var(--accent);
  font-size: 20px;
  width: 36px; height: 36px;
  border-radius: 4px;
  cursor: pointer;
  line-height: 1;
}

@media (max-width: 720px) {
  #menu-toggle { display: block; }
  #sidebar {
    position: fixed;
    top: 0; left: 0;
    height: 100vh;
    z-index: 99;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
  }
  #sidebar.open { transform: translateX(0); }
  #content-inner { padding: 48px 20px 60px; }
}