@font-face {
  font-family: 'Gentium Book Plus';
  src: url('../fonts/GentiumBookPlus-Regular.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
}
@font-face {
  font-family: 'Gentium Book Plus';
  src: url('../fonts/GentiumBookPlus-Italic.ttf') format('truetype');
  font-weight: normal;
  font-style: italic;
}

:root {
  --bg: #ecdcc9;
  --bg-panel: #f5ece0;
  --bg-content: #f8f0e5;
  --border: #d9c3a6;
  --text: #33261a;
  --text-muted: #6f5c48;
  --accent: #b3663f;
  --accent-soft: #e6cead;
  --translation-bar: #5a7a5f;

  /* dimensões fluidas: escalam com a viewport, sem quebrar em faixas fixas */
  --rail-w: clamp(56px, 7vw, 76px);
  --panel-w: clamp(240px, 30vw, 320px);
  --pad-sm: clamp(10px, 2vw, 16px);
  --pad-md: clamp(14px, 3vw, 24px);
  --pad-lg: clamp(16px, 5vw, 40px);
  --base-font: clamp(14px, 1vw + 11px, 18px);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", Roboto, "Noto Sans", sans-serif;
  font-size: calc(var(--base-font) * var(--font-scale, 1));
}

#app {
  display: grid;
  grid-template-columns: var(--rail-w) var(--panel-w) 8px 1fr;
  height: 100vh;
}

/* ---- icon rail ---- */
#icon-rail {
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  padding-top: 10px;
}

.rail-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 12px 4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-size: 12px;
}
.rail-btn .icon { font-size: clamp(18px, 2.2vw, 21px); }
.rail-btn:hover { color: var(--text); }
.rail-btn.active { color: var(--accent); border-left: 3px solid var(--accent); }

/* ---- side panel ---- */
#side-panel {
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  width: var(--panel-w);
  overflow-y: auto;
  transition: width 0.15s ease, padding 0.15s ease;
}
#side-panel.collapsed { width: 0; padding: 0; overflow: hidden; border-right: none; }

.panel { display: none; padding: var(--pad-md); }
.panel.active { display: block; }
.panel h2 { margin: 0 0 12px; font-size: 15px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; }
.panel h3 { margin: 20px 0 8px; font-size: 13px; color: var(--text-muted); }

#panel-resizer {
  position: relative;
  cursor: col-resize;
  user-select: none;
}
#panel-resizer::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  left: 3px;
  width: 2px;
  background: var(--border);
  transition: background 0.15s;
}
#panel-resizer:hover::after { background: var(--accent); }

#panel-collapse {
  flex-shrink: 0;
  align-self: center;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 4px;
  width: 22px; height: 22px;
  cursor: pointer;
  font-size: 14px;
  display: flex; align-items: center; justify-content: center;
  padding: 0;
}
#panel-collapse:hover { background: var(--bg); color: var(--text); }

/* ---- tree ---- */
.tree ul { list-style: none; margin: 0; padding-left: 14px; }
.tree > ul { padding-left: 0; }
.tree li { margin: 2px 0; }
.tree .node-label {
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 6px;
  border-radius: 4px;
}
.tree .node-label:hover { background: var(--accent-soft); }
.tree .node-label.leaf-active { background: var(--accent-soft); color: var(--accent); }
.tree .caret { display: inline-block; width: 12px; transition: transform .1s; color: var(--text-muted); }
.tree .caret.open { transform: rotate(90deg); }
.tree .group-title { font-weight: 600; color: var(--accent); font-size: 13px; text-transform: uppercase; margin-top: 10px; }

/* ---- dictionary ---- */
#dict-search, #search-input {
  width: 100%;
  padding: 8px 10px;
  background: var(--bg-content);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  font-size: 14px;
}
.dict-results { margin-top: 12px; display: flex; flex-direction: column; gap: 10px; }
.dict-entry { border-bottom: 1px solid var(--border); padding-bottom: 8px; }
.dict-entry .headword { font-weight: 700; color: var(--accent); }
.dict-entry .pos { color: var(--text-muted); font-size: 12px; font-style: italic; margin-left: 6px; }
.dict-entry .meaning { font-size: 14px; margin-top: 2px; }
.dict-field { font-size: 12px; color: var(--text-muted); margin-top: 3px; line-height: 1.4; }
.dict-field-label { font-weight: 600; }
.dict-hint { color: var(--text-muted); font-size: 13px; }

.dict-entry-core { padding-bottom: 12px; }
.dict-entry-core .headword { font-size: 16px; }
.dict-senses { display: flex; flex-direction: column; gap: 8px;
    flex-wrap: wrap; margin-top: 6px; }
.dict-sense { background: var(--bg-content); border: 1px solid var(--border); border-radius: 6px; padding: 6px 8px; }
.dict-sense-head { display: flex; align-items: baseline; gap: 4px; }
.dict-sense-id { font-weight: 700; color: var(--accent); font-size: 13px; }
.dict-sense .meaning { font-size: 14px; margin-top: 3px; }
.dict-sense .dict-field { margin-top: 4px; }

/* ---- side lists (history/search) ---- */
.side-list { display: flex; flex-direction: column; gap: 6px; margin-top: 8px; }
.side-item {
  padding: 8px 10px;
  background: var(--bg-content);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}
.side-item:hover { border-color: var(--accent); }
.side-item .meta { color: var(--text-muted); font-size: 11px; }
.side-item .snippet { margin-top: 3px; color: var(--text); }
.side-item mark { background: var(--accent-soft); color: var(--accent); padding: 0 2px; }
.side-empty { color: var(--text-muted); font-size: 13px; font-style: italic; }

/* ---- settings ---- */
.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.setting-row select {
  background: var(--bg-content);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 8px;
}
.font-controls button, #font-dec, #font-inc {
  background: var(--bg-content);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  width: 30px; height: 28px;
  cursor: pointer;
}

/* ---- main reader ---- */
main#reader { display: flex; flex-direction: column; min-width: 0; position: relative; }

#reader-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-panel);
  padding: var(--pad-sm) var(--pad-md);
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
#header-text { flex: 1; min-width: 0; }
#breadcrumb { color: var(--text-muted); font-size: 13px; margin-bottom: 8px; }
#breadcrumb .sep { margin: 0 6px; opacity: .5; }

#tabs-row { display: flex; align-items: center; gap: 8px;
    flex-wrap: wrap; flex-wrap: wrap; }

.part-tabs { display: flex; gap: 6px; flex-wrap: wrap; }
.part-tabs button {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 14px;
  padding: 5px 14px;
  font-size: 13px;
  cursor: pointer;
}
.part-tabs button.active { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }

.chapter-nav { position: relative; margin-left: auto; flex-shrink: 0; }
.chapter-nav-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 14px;
  padding: 5px 12px;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}
.chapter-nav-btn:hover,
.chapter-nav-btn.open { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }
.chapter-nav-btn .chap-arrow { font-size: 10px; opacity: .7; }

.chapter-nav-list {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  z-index: 200;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 8px 28px rgba(0,0,0,.18);
  list-style: none;
  margin: 0;
  padding: 8px 0;
  min-width: 280px;
  max-width: 90vw;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}
.chapter-nav-list li {
  display: flex;
  align-items: baseline;
  gap: 8px;
    flex-wrap: wrap;
  padding: 8px 16px;
  cursor: pointer;
  font-size: 13.5px;
  line-height: 1.45;
  transition: background 0.1s;
}
.chapter-nav-list li:hover { background: var(--accent-soft); color: var(--accent); }
.chapter-nav-list .chap-num {
  color: var(--text-muted);
  font-size: 11px;
  flex-shrink: 0;
  min-width: 24px;
  text-align: right;
}
.chapter-nav-list .chap-text { flex: 1; }

.content {
  flex: 1;
  overflow-y: auto;
  padding: var(--pad-lg);
  background: var(--bg-content);
}

.seg { margin: 0 auto 14px auto; max-width: min(900px, 100%); transition: background 1.4s ease; border-radius: 4px; }
.seg .pali-line {
  font-family: "Gentium Book Plus", Georgia, serif;
  line-height: 1.7;
}
.seg .paranum-badge {
  display: inline-block;
  min-width: 1.4em;
  text-align: center;
  font-weight: 700;
  color: var(--accent);
  margin-right: 6px;
  font-size: .85em;
}
.seg .translation-line {
  border-left: 3px solid var(--translation-bar);
  padding-left: 10px;
  margin-top: 4px;
  color: var(--text-muted);
  line-height: 1.6;
}
.seg.no-translation .translation-line { display: none; }
.seg.no-pali .pali-line { display: none; }
.seg.seg-flash { background: var(--accent-soft); }

.seg[data-rend="book"] .pali-line,
.seg[data-rend="nikaya"] .pali-line,
.seg[data-rend="title"] .pali-line {
  text-align: center;
  font-size: 1.3em;
  font-weight: 700;
  margin: 18px 0 4px;
}
.seg[data-rend="book"] .translation-line,
.seg[data-rend="nikaya"] .translation-line,
.seg[data-rend="title"] .translation-line {
  text-align: center;
  border-left: none;
  padding-left: 0;
  font-style: italic;
}
.seg[data-rend="chapter"] .pali-line { font-size: 1.15em; font-weight: 700; margin-top: 22px; color: var(--accent); }
.seg[data-rend="subhead"] .pali-line { font-weight: 700; margin-top: 12px; }
.seg[data-rend="subsubhead"] .pali-line { font-weight: 600; font-style: italic; }
.seg[data-rend="centre"] .pali-line { text-align: center; }
.seg[data-rend="centre"] .translation-line { text-align: center; border-left: none; padding-left: 0; }
.seg[data-rend^="gatha"] .pali-line { font-style: italic; margin-left: 2em; }
.seg[data-rend="hangnum"] .pali-line { margin-left: 1.4em; text-indent: -1.4em; }
.seg[data-rend="hangnum"] .translation-line { margin-left: 1.4em; }

/* ADL / Contemporary Commentaries */
.seg[data-rend="indent"] .pali-line,
.seg[data-rend="indent"] .translation-line {
  margin-left: 2em;
  padding-left: 1em;
  border-left: 3px solid var(--accent-soft, #c8a96e44);
  font-style: italic;
}
.seg[data-rend="indent"] .translation-line {
  border-left: 3px solid var(--translation-bar);
  margin-top: 4px;
}
.seg[data-rend="unindented"] .pali-line { margin-top: 6px; }
.seg[data-rend="footnote"] .pali-line,
.seg[data-rend="footnote"] .translation-line {
  font-size: 0.82em;
  color: var(--text-muted);
  opacity: 0.8;
}
.seg[data-rend="footnote"] .pali-line { margin-top: 2px; }
.seg[data-rend="glossary"] .pali-line { font-weight: 600; }
.seg[data-rend="glossary"] .pali-line b { color: var(--accent); }

sup.var-note { color: var(--accent); cursor: help; font-size: .7em; }

#toc-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: var(--pad-sm);
  border-top: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text-muted);
  font-size: 13px;
}
#toc-nav button {
  background: var(--bg-content);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 4px;
  width: 30px; height: 26px;
  cursor: pointer;
}
#toc-nav button:disabled { opacity: .3; cursor: default; }

.note-tooltip {
  position: fixed;
  max-width: min(320px, 90vw);
  background: #000;
  color: #fff;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 13px;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,.4);
}
.note-tooltip.hidden { display: none; }

.loading { color: var(--text-muted); font-style: italic; padding: 20px 0; text-align: center; }

.welcome { max-width: min(560px, 90vw); margin: var(--pad-lg) auto; text-align: center; color: var(--text-muted); }
.welcome-logo {
  width: 100%;
  height: auto;
  display: block;
  margin-bottom: 16px;
}
.welcome-credit { margin-top: 20px; }


/* ---- export panel ---- */
#export-panel-body select {
  width: 100%;
  margin: .4em 0 .8em;
  padding: 6px 8px;
  border-radius: 5px;
  border: 1px solid var(--border);
  background: var(--bg-content);
  color: var(--text);
}
#export-panel-body button:hover { opacity: .88; }
#export-panel-body button:disabled { opacity: .5; cursor: default; }

/* ---- bidirectional selection ---- */
.selection-counterpart {
  background: rgba(179, 102, 63, 0.10);
  outline: 2px solid var(--accent-soft);
  border-radius: 3px;
  transition: background 0.2s, outline 0.2s;
}

#selection-popover {
  position: fixed;
  width: min(320px, 90vw);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  z-index: 200;
  box-shadow: 0 4px 20px rgba(0,0,0,.18);
  font-size: 13px;
  max-height: 60vh;
  overflow-y: auto;
}
#selection-popover.hidden { display: none; }
.sp-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-bottom: 8px;
}
.sp-text {
  color: var(--text);
  line-height: 1.55;
  font-size: 13.5px;
  border-left: 3px solid var(--accent-soft);
  padding-left: 8px;
  margin-bottom: 4px;
}
.sp-text.sp-empty { color: var(--text-muted); font-style: italic; }
.sp-divider { border: none; border-top: 1px solid var(--border); margin: 8px 0; }
.sp-dict-section { font-size: 11px; font-weight: 600; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .04em; margin-bottom: 6px; }
.sp-dict-head { font-weight: 700; color: var(--accent); font-size: 14px; }
.sp-dict-pos { font-size: 11px; color: var(--text-muted); margin-left: 5px; }
.sp-dict-meaning { color: var(--text); line-height: 1.5; margin-top: 4px; font-size: 13px; }
.sp-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 18px;
  line-height: 1;
  padding: 0 2px;
  flex-shrink: 0;
}
.sp-close:hover { color: var(--text); }

/* ── Fullscreen Reader Overlays ─────────────────────────────────────────────── */

.reader-overlay {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  width: 100%; height: 100%; padding: 24px;
  overflow-y: auto; box-sizing: border-box;
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background: var(--bg-content);
}
.reader-overlay > div {
  width: 100%; max-width: min(1100px, 95%);
}

/* ── SRS Module ────────────────────────────────────────────────────────────── */

.srs-stats {
  display: flex; gap: 24px; justify-content: center;
  padding: 12px 0; margin-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.srs-stat {
  font-size: 16px; color: var(--text-muted); cursor: default;
}

.srs-card-wrap {
  min-height: 340px; display: flex; align-items: center; justify-content: center;
}
.srs-card {
  width: 100%; padding: 48px 48px; text-align: center; cursor: pointer;
  background: var(--bg-content); border: 1px solid var(--border);
  border-radius: 12px; transition: box-shadow .2s;
}
.srs-card:hover { box-shadow: 0 4px 20px rgba(0,0,0,.1); }

.srs-headword {
  font-size: 48px; font-weight: 700; color: var(--text);
  font-family: 'Gentium Book Plus', Georgia, serif; margin-bottom: 10px;
}
.srs-pos { font-size: 16px; color: var(--text-muted); font-style: italic; }
.srs-freq { font-size: 14px; color: var(--text-muted); margin-top: 6px; }
.srs-tap {
  font-size: 13px; color: var(--accent); margin-top: 20px;
  opacity: .6; animation: srsPulse 2s ease-in-out infinite;
}
@keyframes srsPulse { 0%,100%{ opacity:.4; } 50%{ opacity:.8; } }

.srs-meaning {
  font-size: 24px; color: var(--text); line-height: 1.5;
  margin: 16px 0; font-family: 'Gentium Book Plus', Georgia, serif;
}
.srs-grammar { font-size: 15px; color: var(--accent); margin: 8px 0; }
.srs-root { font-size: 15px; color: var(--text-muted); font-style: italic; margin: 8px 0; }
.srs-usage {
  font-size: 15px; color: var(--text-muted); margin-top: 16px;
  padding-top: 12px; border-top: 1px solid var(--border); text-align: left;
}

.srs-ratings {
  display: flex; gap: 12px; justify-content: center; margin-top: 20px;
}
.srs-btn {
  flex: 1; padding: 14px 10px; border: none; border-radius: 8px;
  font-size: 15px; font-weight: 600; cursor: pointer; color: #fff;
}
.srs-btn-again { background: #c0392b; }
.srs-btn-hard { background: #e67e22; }
.srs-btn-good { background: #27ae60; }
.srs-btn-easy { background: #2980b9; }
.srs-btn:hover { filter: brightness(1.1); }

.srs-progress-wrap {
  margin-top: 12px; position: relative;
  background: var(--border); border-radius: 4px; height: 6px;
  overflow: hidden;
}
.srs-progress-bar {
  height: 100%; background: var(--accent); border-radius: 4px;
  transition: width .3s ease;
}
.srs-progress-text {
  text-align: center; font-size: 11px; color: var(--text-muted); margin-top: 4px;
}

.srs-empty, .srs-loading {
  text-align: center; color: var(--text-muted); padding: 30px 0; font-size: 14px;
}
.srs-complete-icon { font-size: 32px; margin-bottom: 8px; }
.srs-complete-text { font-size: 16px; font-weight: 600; color: var(--text); }
.srs-complete-stats { font-size: 13px; color: var(--text-muted); margin-top: 8px; }

/* ── Graph Module ──────────────────────────────────────────────────────────── */

.graph-filters {
  display: grid; grid-template-columns: auto 1fr; gap: 4px 8px;
  align-items: center; margin-bottom: 8px;
}
.graph-filter-label {
  font-size: 11px; color: var(--text-muted); text-transform: uppercase;
  letter-spacing: .03em;
}
.graph-select {
  width: 100%; padding: 4px 6px; border-radius: 5px;
  border: 1px solid var(--border); background: var(--bg-content);
  color: var(--text); font-size: 12px;
}

.graph-canvas-wrap {
  border: 1px solid var(--border); border-radius: 8px;
  overflow: hidden; background: #f8f0e5;
  flex: 1; min-height: 300px;
}
.graph-canvas {
  display: block; width: 100%; height: 100%;
}

#reader-graph > div {
  max-width: 100%; display: flex; flex-direction: column; height: 100%;
}

.graph-legend {
  display: flex; gap: 10px; justify-content: center;
  font-size: 11px; color: var(--text-muted); margin-top: 8px;
  flex-wrap: wrap;
}

/* ══════════════════════════════════════════════════════════════════════════════
   ABHIDHAMMA TOOLS
   ══════════════════════════════════════════════════════════════════════════════ */

.tools-tab-bar {
  display: flex; gap: 2px; border-bottom: 2px solid var(--border);
  padding: 0 8px; background: var(--bg-panel);
  flex-shrink: 0; overflow-x: auto;
}
.tools-tab-btn {
  padding: 10px 14px; border: none; background: none;
  font-size: 13px; font-family: 'Gentium Book Plus', Georgia, serif; cursor: pointer;
  color: var(--text-muted); border-bottom: 3px solid transparent;
  transition: all .2s; white-space: nowrap;
  display: flex; align-items: center; gap: 6px;
}
.tools-tab-btn:hover { color: var(--text); background: var(--accent-soft); }
.tools-tab-btn.active {
  color: var(--accent); border-bottom-color: var(--accent); font-weight: 600;
}
.tools-tab-icon { font-size: 16px; }
.tools-content {
  flex: 1; overflow: hidden; padding: 0; min-height: 0; display: flex; flex-direction: column;
}
/* Individual tool panels fill the content area */
.tools-panel {
  display: none;
  flex: 1;
  flex-direction: column;
  overflow: auto;
  padding: 20px;
  min-height: 0;
}
/* Patthana panel: let the wrap fill all remaining height */
#tools-panel-patthana { padding: 12px; }
.patt-wrap { overflow: auto; flex: 1; min-height: 0; }

#reader-tools > div {
  max-width: 100%; display: flex; flex-direction: column; height: 100%; width: 100%;
}

/* ── Mindmap ── */
.mm-search-wrap { margin-bottom: 16px; }
.mm-search {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border);
  border-radius: 8px; font-size: 14px; font-family: 'Gentium Book Plus', Georgia, serif;
  background: var(--bg-content); color: var(--text);
}
.mm-search:focus { border-color: var(--accent); outline: none; }
.mm-tree, .mm-children { list-style: none; padding-left: 20px; margin: 0; }
.mm-tree { padding-left: 0; }
.mm-node {
  display: flex; align-items: baseline; gap: 6px; flex-wrap: wrap;
  padding: 6px 10px; border-radius: 6px; cursor: pointer; transition: background .15s;
}
.mm-node:hover { background: var(--accent-soft); }
.mm-depth-0 { font-size: 18px; font-weight: 700; }
.mm-depth-1 { font-size: 16px; font-weight: 600; }
.mm-depth-2 { font-size: 14px; font-weight: 600; }
.mm-depth-3 { font-size: 13px; }
.mm-depth-4 { font-size: 12px; }
.mm-bullet { color: var(--accent); font-size: 8px; }
.mm-pali { color: var(--text); font-family: 'Gentium Book Plus', Georgia, serif; }
.mm-trans { color: var(--text-muted); font-style: italic; }
.mm-count {
  background: var(--accent); color: #fff; font-size: 10px;
  padding: 1px 6px; border-radius: 10px; font-weight: 600;
}
.mm-desc { font-size: 11px; color: var(--text-muted); display: block; width: 100%; }
details > summary { list-style: none; }
details > summary::marker, details > summary::-webkit-details-marker { display: none; }
details > summary::before { content: "▶"; font-size: 10px; color: var(--accent); margin-right: 6px; transition: transform .2s; display: inline-block; }
details[open] > summary::before { transform: rotate(90deg); }
.mm-loading { padding: 40px; text-align: center; color: var(--text-muted); font-style: italic; }

/* ── Paṭṭhāna Matrix ── */
.patt-wrap { overflow: auto; max-height: 100%; }
.patt-table { border-collapse: collapse; font-size: 12px; font-family: 'Gentium Book Plus', Georgia, serif; width: max-content; }
.patt-table th, .patt-table td { border: 1px solid var(--border); padding: 6px 8px; text-align: center; }
.patt-corner { background: var(--bg-panel); min-width: 160px; }
.patt-col-header { background: var(--bg-panel); position: sticky; top: 0; z-index: 1; height: 100px; vertical-align: bottom; padding: 4px; }
.patt-col-text { writing-mode: vertical-lr; transform: rotate(180deg); font-size: 11px; white-space: nowrap; }
.patt-row-label { text-align: left; font-weight: 600; position: sticky; left: 0; background: var(--bg-panel); z-index: 1; }
.patt-yes { background: var(--accent-soft); color: var(--accent); font-weight: bold; }
.patt-no { color: var(--border); }

/* ── Citta-Vīthi ── */
.vithi-doors { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 16px; }
.vithi-door-btn {
  padding: 8px 14px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg-content); font-size: 13px; cursor: pointer;
  font-family: 'Gentium Book Plus', Georgia, serif; transition: all .2s;
}
.vithi-door-btn:hover { background: var(--accent-soft); }
.vithi-door-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.vithi-seq-wrap { overflow-x: auto; padding: 16px 0; margin-bottom: 16px; }
.vithi-strip { display: flex; align-items: center; gap: 4px; min-width: max-content; }
.vithi-box {
  border: 2px solid var(--border); border-radius: 8px;
  padding: 10px 6px; min-width: 90px; max-width: 120px; text-align: center;
  cursor: pointer; transition: all .2s; background: var(--bg-content);
}
.vithi-box:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,.1); }
.vithi-active { transform: scale(1.1); box-shadow: 0 4px 16px rgba(0,0,0,.15); }
.vithi-abbrev { font-size: 20px; font-weight: 700; font-family: 'Gentium Book Plus', Georgia, serif; }
.vithi-label { font-size: 10px; font-weight: 600; color: var(--text); margin-top: 4px; word-break: break-word; line-height: 1.2; }
.vithi-trans { font-size: 9px; color: var(--text-muted); font-style: italic; margin-top: 2px; line-height: 1.1; }
.vithi-arrow { color: var(--text-muted); font-size: 14px; flex-shrink: 0; }
.vithi-controls { display: flex; gap: 8px;
    flex-wrap: wrap; align-items: center; flex-wrap: wrap; margin-bottom: 16px; }
.vithi-btn {
  padding: 8px 16px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg-content); font-size: 13px; cursor: pointer; font-family: 'Gentium Book Plus', Georgia, serif;
}
.vithi-btn:hover { background: var(--accent-soft); }
.vithi-speed-label { font-size: 12px; color: var(--text-muted); display: flex; align-items: center; gap: 6px; }
.vithi-info {
  background: var(--bg-panel); border: 1px solid var(--border);
  border-radius: 8px; padding: 16px; min-height: 60px;
}
.vithi-info h4 { margin: 0 0 6px; font-size: 14px; color: var(--accent); }
.vithi-cetasika-count { font-size: 12px; color: var(--text-muted); margin: 4px 0; }
.vithi-cetasika-list { display: flex; flex-wrap: wrap; gap: 4px; }

/* ── Mātikā Explorer ── */
.mat-tab-bar { display: flex; gap: 4px; margin-bottom: 16px; }
.mat-tab {
  padding: 8px 16px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg-content); font-size: 13px; cursor: pointer; font-family: 'Gentium Book Plus', Georgia, serif;
}
.mat-tab:hover { background: var(--accent-soft); }
.mat-tab.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.mat-item { border: 1px solid var(--border); border-radius: 8px; margin-bottom: 6px; overflow: hidden; }
.mat-summary {
  padding: 10px 14px; cursor: pointer; display: flex; align-items: baseline;
  gap: 8px;
    flex-wrap: wrap; font-family: 'Gentium Book Plus', Georgia, serif;
}
.mat-summary:hover { background: var(--accent-soft); }
.mat-id { font-size: 12px; color: var(--text-muted); font-weight: 600; min-width: 24px; }
.mat-title-pali { font-size: 14px; font-weight: 600; color: var(--text); }
.mat-title-trans { font-size: 13px; color: var(--text-muted); font-style: italic; }
.mat-body { padding: 12px 14px; background: var(--bg-panel); }
.mat-term { display: flex; gap: 12px; padding: 6px 0; border-bottom: 1px solid var(--border); }
.mat-term:last-child { border-bottom: none; }
.mat-pali { font-weight: 600; color: var(--accent); min-width: 180px; font-family: 'Gentium Book Plus', Georgia, serif; }
.mat-trans { color: var(--text-muted); font-style: italic; }
.mat-def { font-size: 12px; color: var(--text-muted); margin-top: 8px; font-style: italic; }

/* ── Cetasika Analyzer ── */
.cet-mode-bar { display: flex; gap: 4px; margin-bottom: 16px; }
.cet-mode-btn {
  padding: 8px 16px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg-content); font-size: 13px; cursor: pointer; font-family: 'Gentium Book Plus', Georgia, serif;
}
.cet-mode-btn:hover { background: var(--accent-soft); }
.cet-mode-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.cet-sel-wrap { margin-bottom: 16px; }
.cet-select {
  width: 100%; padding: 10px; border: 1px solid var(--border);
  border-radius: 8px; font-size: 13px; font-family: 'Gentium Book Plus', Georgia, serif;
  background: var(--bg-content); color: var(--text);
}
.cet-count { font-size: 14px; font-weight: 600; color: var(--accent); margin-bottom: 12px; text-align: center; }
.cet-group-header {
  font-size: 13px; font-weight: 600; color: var(--text);
  padding: 8px 0 4px; border-bottom: 1px solid var(--border); margin-top: 12px;
}
.cet-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 4px; padding: 8px 0; }
.cet-item { display: flex; align-items: center; gap: 6px; padding: 4px 8px; border-radius: 4px; font-size: 12px; }
.cet-yes { background: rgba(74,140,80,0.12); }
.cet-no { background: rgba(0,0,0,0.03); color: var(--text-muted); opacity: 0.6; }
.cet-check { font-weight: 700; font-size: 14px; }
.cet-yes .cet-check { color: #4a8c50; }
.cet-no .cet-check { color: #ccc; }
.cet-name { font-weight: 600; font-family: 'Gentium Book Plus', Georgia, serif; }
.cet-trans { color: var(--text-muted); font-style: italic; }
.cet-comp-wrap { display: flex; gap: 16px; margin-bottom: 16px; }
.cet-comp-col { flex: 1; }
.cet-comp-result { margin-top: 12px; }
.cet-comp-section { margin-bottom: 12px; }
.cet-comp-title { font-size: 13px; margin: 0 0 6px; }
.cet-common { color: #4a8c50; }
.cet-only-a { color: #3a7ac2; }
.cet-only-b { color: #b33f3f; }
.cet-tag, .vithi-cetasika-tag {
  display: inline-flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 5px 10px; border-radius: 6px; margin: 3px;
  vertical-align: top; text-align: center; line-height: 1.2;
}
.cet-tag-common { background: rgba(74,140,80,0.15); }
.cet-tag-a { background: rgba(58,122,194,0.15); }
.cet-tag-b { background: rgba(179,63,63,0.15); }
.vithi-cetasika-tag { background: var(--accent-soft); }

.cet-tag-pali { font-size: 13px; font-weight: 600; font-family: 'Gentium Book Plus', Georgia, serif; color: var(--text); }
.cet-tag-trans { font-size: 10.5px; color: var(--text-muted); font-style: italic; margin-top: 3px; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }

/* Fix for mobile matrices (Sticky Headers) */
.patt-wrap table {
  border-collapse: collapse;
}
.patt-wrap th {
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--bg);
  box-shadow: 0 1px 0 var(--border);
}
.patt-wrap th:first-child,
.patt-wrap td:first-child {
  position: sticky;
  left: 0;
  z-index: 1;
  background: var(--bg);
  box-shadow: 1px 0 0 var(--border);
}
.patt-wrap th:first-child {
  z-index: 3;
}

/* ====== SUPER RESPONSIVE MOBILE LAYOUT ====== */
@media (max-width: 600px) {
  #app {
    display: flex;
    flex-direction: column-reverse;
  }
  
  /* Rail turns into a Bottom Navigation Bar */
  #icon-rail {
    flex-direction: row;
    height: 60px;
    padding-top: 0;
    border-right: none;
    border-top: 1px solid var(--border);
    justify-content: space-around;
    z-index: 50;
    width: 100%;
    background: var(--bg-panel);
  }
  
  .rail-btn {
    border-left: none !important;
    border-top: 3px solid transparent;
    padding: 6px;
    flex: 1;
    font-size: 11px;
    justify-content: center;
  }
  
  .rail-btn.active {
    border-top-color: var(--accent);
    background: var(--accent-soft);
  }
  
  /* The side panel becomes a full-screen drawer above the nav bar */
  #side-panel {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    bottom: 60px;
    width: 100% !important;
    max-width: 100% !important;
    z-index: 40;
    box-shadow: none;
    border-right: none;
  }
  
  /* When collapsed, hide it entirely */
  #side-panel.collapsed {
    display: none;
  }
  
  /* Content area takes remaining space above nav bar */
  #reader {
    flex: 1;
    overflow-y: auto;
    position: relative;
    width: 100%;
    padding-bottom: 20px;
  }

  #panel-resizer {
    display: none;
  }

  /* Adjust overlays */
  .reader-overlay {
    z-index: 35;
  }

  /* Tools matrices */
  .vithi-doors {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .cet-comp-wrap {
    flex-direction: column;
  }
  
  /* SRS Mobile tweaks */
  .srs-card {
    padding: 24px 20px;
  }
  .srs-headword {
    font-size: 36px;
  }
  .srs-card-wrap {
    min-height: 240px;
  }
  .srs-btn {
    padding: 12px 16px;
    font-size: 13px;
  }
  .srs-ratings {
    gap: 8px;
    flex-wrap: wrap;
  }

  /* Padding adjustments */
  .panel { padding: 12px; }
  #content { padding: 12px; }
}

/* Refinements for Mobile Bottom Nav */
@media (max-width: 600px) {
  .rail-btn .icon {
    font-size: 24px;
    margin: 0;
  }
  
  .rail-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
  }
  
  .rail-btn.active {
    background: transparent;
    color: var(--accent);
    transform: translateY(-2px);
  }
}

/* Hide rail labels on smaller tablets to save space */
@media (max-width: 800px) {
  .rail-btn .lbl { display: none; }
}

/* ── Mobile export panel refinements ──────────────────────────── */
@media (max-width: 600px) {
  #export-panel-body select {
    font-size: 13px;
    padding: 8px 6px;
  }
  #export-panel-body button {
    padding: 12px;
    font-size: 14px;
  }

  /* Selection popover: ensure it doesn't overflow on small screens */
  #selection-popover {
    width: calc(100vw - 24px);
    left: 12px !important;
    right: 12px !important;
    max-height: 50vh;
  }

  /* Reader header: stack tabs vertically if cramped */
  #tabs-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
  .chapter-nav { margin-left: 0; }
  
  /* Part tabs: scroll horizontally if too many */
  .part-tabs {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
  }
  .part-tabs button {
    white-space: nowrap;
    flex-shrink: 0;
  }
}