:root {
  --bg: #1e1e2e;
  --fg: #cdd6f4;
  --accent: #89b4fa;
  --accent-hover: #b4befe;
  --border: #45475a;
  --card: #313244;
  --code-bg: #181825;
  --link: #89b4fa;
  --muted: #6c7086;
  --sidebar-bg: #181825;
  --hover-bg: #313244;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #fafafa;
    --fg: #1e1e2e;
    --accent: #1c6cd1;
    --accent-hover: #1558a8;
    --border: #d4d4d8;
    --card: #ffffff;
    --code-bg: #f0f0f0;
    --link: #1c6cd1;
    --muted: #71717a;
    --sidebar-bg: #f0f0f0;
    --hover-bg: #e4e4e7;
  }
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---- Two-panel layout ---- */
.app {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.sidebar {
  width: 320px;
  min-width: 280px;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-header {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
}

.sidebar-header h1 {
  font-size: 1.3rem;
  color: var(--accent);
}

.search-bar {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
}

#search-input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-size: 0.95rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--card);
  color: var(--fg);
  outline: none;
  transition: border-color 0.2s;
}

#search-input:focus {
  border-color: var(--accent);
}

.result-count {
  padding: 0.4rem 1rem;
  font-size: 0.8rem;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
}

.results {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem;
}

.result-item {
  padding: 0.5rem 0.75rem;
  margin-bottom: 0.3rem;
  border-radius: 5px;
  cursor: pointer;
  transition: background 0.15s;
}

.result-item:hover,
.result-item.active {
  background: var(--hover-bg);
}

.result-item .result-title {
  font-weight: 600;
  color: var(--accent);
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.result-item .result-snippet {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 0.15rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---- Main panel ---- */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.main-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--sidebar-bg);
}

#back-btn {
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--card);
  color: var(--fg);
  cursor: pointer;
  white-space: nowrap;
}

#back-btn:hover {
  border-color: var(--accent);
}

.page-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--accent);
}

.reader-content {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem 2rem;
  line-height: 1.7;
}

.welcome {
  max-width: 500px;
  margin: 3rem auto;
  text-align: center;
  color: var(--muted);
}

.welcome h2 {
  color: var(--accent);
  margin-bottom: 1rem;
}

.welcome kbd {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1rem 0.4rem;
  font-size: 0.85rem;
}

.welcome code {
  background: var(--code-bg);
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  font-size: 0.9em;
}

/* ---- Content styling (manpage) ---- */
.reader-content h1,
.reader-content h2,
.reader-content h3,
.reader-content h4 {
  color: var(--accent);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.reader-content h1 { font-size: 1.5rem; }
.reader-content h2 { font-size: 1.25rem; }
.reader-content h3 { font-size: 1.1rem; }

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

.reader-content code {
  background: var(--code-bg);
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  font-size: 0.9em;
}

.reader-content pre {
  background: var(--code-bg);
  padding: 0.75rem 1rem;
  border-radius: 6px;
  overflow-x: auto;
  margin: 0.5rem 0;
}

.reader-content pre code {
  background: none;
  padding: 0;
}

.reader-content table {
  border-collapse: collapse;
  width: 100%;
  margin: 0.5rem 0;
  font-size: 0.9rem;
}

.reader-content th,
.reader-content td {
  border: 1px solid var(--border);
  padding: 0.4rem 0.6rem;
  text-align: left;
}

.reader-content th {
  background: var(--code-bg);
}

.reader-content p {
  margin-bottom: 0.6rem;
}

.reader-content ul,
.reader-content ol {
  margin-left: 1.5rem;
  margin-bottom: 0.6rem;
}

/* ---- Footer ---- */
footer {
  text-align: center;
  padding: 0.5rem;
  color: var(--muted);
  font-size: 0.75rem;
  border-top: 1px solid var(--border);
}

footer a {
  color: var(--link);
}

/* ---- Responsive: collapse to single column on narrow screens ---- */
@media (max-width: 700px) {
  .app {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    min-width: 0;
    max-height: 40vh;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .reader-content {
    padding: 1rem;
  }
}