@font-face {
  font-family: 'Siddhanta';
  src: url('siddhanta.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

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

:root {
  --bg: #1e1e1e;
  --bg-surface: #252526;
  --bg-hover: rgba(255,255,255,0.08);
  --text: #d4d4d4;
  --text-dim: #808080;
  --accent: #569cd6;
  --border: #3e3e42;
  --diff-insert: rgba(72, 191, 83, 0.25);
  --diff-delete: rgba(229, 83, 75, 0.25);
  --diff-modify: rgba(229, 183, 60, 0.25);
  --diff-insert-fg: #4ec956;
  --diff-delete-fg: #e55c54;
  --diff-modify-fg: #e5b73c;
  --highlight: rgba(255,255,255,0.12);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Siddhanta', 'Noto Serif Devanagari', 'Segoe UI', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

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

header h1 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
}

nav { display: flex; gap: 0.5rem; }

.nav-btn, .toggle-btn {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 0.3rem 0.8rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  font-family: inherit;
}

.nav-btn:hover, .toggle-btn:hover { background: var(--bg-hover); }
.nav-btn.active { color: var(--accent); border-color: var(--accent); }

.view { display: none; height: calc(100vh - 3rem); }
.view.active { display: flex; flex-direction: column; }

.view-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 1.5rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}

.view-header label { color: var(--text-dim); }

.view-header select {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-family: inherit;
  font-size: 0.85rem;
}

.dual-panes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  flex: 1;
  overflow: hidden;
}

.dual-panes.single-pane { grid-template-columns: 1fr; }
.dual-panes.single-pane > .pane.hidden { display: none; }

.pane {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  overflow: hidden;
}

.pane:last-child { border-right: none; }

.pane h2 {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--text-dim);
  padding: 0.35rem 1rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.pane-content {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
}

.verse-block { margin-bottom: 1.25rem; }

.verse-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 0.2rem;
}

.verse-text {
  font-size: 1.05rem;
  line-height: 1.8;
  word-spacing: 0.15em;
}

.token {
  cursor: default;
  padding: 1px 2px;
  border-radius: 2px;
  transition: background 0.1s;
}

.token.highlight { background: var(--highlight); }

.token.diff-equal { }
.token.diff-insert { background: var(--diff-insert); color: var(--diff-insert-fg); }
.token.diff-delete { background: var(--diff-delete); color: var(--diff-delete-fg); }
.token.diff-modify { background: var(--diff-modify); color: var(--diff-modify-fg); }

.diff-pair { margin-bottom: 1.25rem; }
.diff-pair .verse-label { font-size: 0.75rem; color: var(--text-dim); margin-bottom: 0.2rem; }
.diff-pair .verse-text { font-size: 1.05rem; line-height: 1.8; }

.placeholder {
  color: var(--text-dim);
  font-style: italic;
  font-size: 0.9rem;
  padding: 0.5rem 0;
}

.note {
  font-size: 0.7rem;
  color: var(--text-dim);
  font-style: italic;
  margin-left: 0.5rem;
}

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