/* ============================================================
   ARIA MATH PANEL — math.css
   Add to index.html: <link rel="stylesheet" href="style/math.css">
   ============================================================ */

#mathPanel {
  position: fixed;
  right: 0;
  top: 0;
  width: 520px;
  max-width: 100vw;
  height: 100dvh;
  background: var(--bg-inset);
  border-left: 1px solid var(--border);
  box-shadow: -6px 0 40px color-mix(in srgb, var(--accent) 20%, transparent);
  z-index: 7900;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.23, 1, 0.32, 1);
  overflow: hidden;
  font-family: var(--font-sans);
}
#mathPanel.open {
  transform: translateX(0);
}

body.mathPanelOpen #chatWindow {
  margin-right: 520px;
  transition: margin-right 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

#mathPanelHeader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-strong);
  background: var(--bg-inset);
  flex-shrink: 0;
  gap: 10px;
}
#mathPanelHeader > span {
  font-family: var(--font-sans);
  font-size: 11px;
  letter-spacing: 0.02em;
  color: var(--accent-text);
  text-shadow: none;
  white-space: nowrap;
}
.mathTabBtn {
  background: var(--bg-inset);
  border: 1px solid var(--border);
  color: #555;
  padding: 5px 12px;
  font-family: var(--font-sans);
  font-size: 8px;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: all 0.12s;
  white-space: nowrap;
}
.mathTabBtn:hover {
  border-color: var(--border);
  color: var(--accent-text);
}
.mathTabBtn.active {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border-color: var(--accent-border);
  color: var(--accent-text);
  text-shadow: none;
}
#mathPanelHeader button:last-child {
  background: none;
  border: 1px solid var(--border);
  color: #444;
  padding: 4px 8px;
  cursor: pointer;
  font-size: 12px;
  transition: all 0.12s;
  flex-shrink: 0;
  margin-left: 4px;
}
#mathPanelHeader button:last-child:hover {
  border-color: var(--border);
  color: var(--accent-text);
}

/* Desmos container */
#desmosContainer {
  flex: 1;
  min-height: 0;
  background: var(--bg);
  color-scheme: dark;
}
#desmosContainer .dcg-expressions-background {
  background: var(--bg-inset) !important;
  border-right: 1px solid var(--border) !important;
}
#desmosContainer .dcg-keypad-outer {
  background: var(--bg-inset) !important;
  border-top: 1px solid var(--border) !important;
}
#desmosContainer .dcg-btn-light-gray,
#desmosContainer .dcg-btn-gray {
  background: var(--bg-inset) !important;
  border-color: var(--border) !important;
  color: var(--accent-text) !important;
}
#desmosContainer .dcg-btn-red {
  background: var(--accent) !important;
  color: #000 !important;
}
#desmosContainer .dcg-expression-text,
#desmosContainer .dcg-label {
  color: var(--accent-text) !important;
  font-family: var(--font-sans);
}

/* Viz tab */
#mathVizContainer {
  flex: 1;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
  background: var(--bg);
}
#mathVizInput {
  display: flex;
  gap: 6px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-inset);
  flex-shrink: 0;
  align-items: center;
}
#mathVizExpr {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--accent-text);
  font-family: var(--font-sans);
  font-size: 12px;
  padding: 5px 10px;
  outline: none;
  caret-color: var(--accent-text);
}
#mathVizExpr::placeholder {
  color: var(--border);
}
#mathVizExpr:focus {
  border-color: var(--border);
}
#mathVizType {
  background: var(--bg-inset);
  border: 1px solid var(--border);
  color: var(--accent-text);
  font-family: var(--font-sans);
  font-size: 10px;
  padding: 5px 8px;
  outline: none;
  cursor: pointer;
}
#mathVizInput > button {
  background: transparent;
  border: 1px solid var(--accent-border);
  color: var(--accent-text);
  font-family: var(--font-sans);
  font-size: 8px;
  letter-spacing: 0.02em;
  padding: 5px 12px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.12s;
}
#mathVizInput > button:hover {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent-text);
}
#mathVizCanvas {
  flex: 1;
  width: 100%;
  background: var(--bg);
  display: block;
  min-height: 0;
}
#mathVizLatex {
  padding: 10px 12px;
  font-family: var(--font-sans);
  font-size: 12px;
  color: #555;
  border-top: 1px solid var(--border);
  background: var(--bg-inset);
  min-height: 36px;
  flex-shrink: 0;
  line-height: 1.6;
}

/* Symbols tab */
#mathPanelBody {
  flex: 1;
  overflow-y: auto;
  padding: 10px;
  background: var(--bg-inset);
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
#mathPanelBody::-webkit-scrollbar {
  width: 3px;
}
#mathPanelBody::-webkit-scrollbar-thumb {
  background: var(--bg-card);
}
.mathSection {
  margin-bottom: 4px;
}
.mathSectionLabel {
  font-family: var(--font-sans);
  font-size: 7px;
  letter-spacing: 0.02em;
  color: var(--border);
  margin-bottom: 8px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border);
}
.mathKeyGrid {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}
.mathKey {
  background: var(--bg-inset);
  border: 1px solid var(--border);
  color: var(--accent-text);
  padding: 6px 10px;
  font-family: var(--font-sans);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.1s;
  min-width: 36px;
  text-align: center;
  line-height: 1;
}
.mathKey:hover {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border-color: var(--border);
  color: var(--accent-text);
  text-shadow: none;
}
.mathKey:active {
  transform: scale(0.93);
}

@media (max-width: 768px) {
  #mathPanel {
    width: 100vw;
  }
  body.mathPanelOpen #chatWindow {
    margin-right: 0;
  }
}

/* ════════════════════════════════════════════════════════════
   NATIVE MATH GRAPHER (Mark 1.3) — replaces Desmos iframe
   ════════════════════════════════════════════════════════════ */
.mathGrapher {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--bg-panel);
  font-family: var(--font-mono);
  color: var(--text-blaze);
}
.mgHeader {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-cut);
  flex-shrink: 0;
}
.mgTitle {
  font-size: 10px;
  letter-spacing: 0.02em;
  color: var(--red-core);
  text-shadow: none;
}
.mgHeaderBtns {
  display: flex;
  gap: 4px;
}
.mgHeaderBtns button {
  width: 26px;
  height: 26px;
  background: transparent;
  border: 1px solid var(--border-cut);
  border-radius: var(--radius-sm);
  color: var(--text-hot);
  cursor: pointer;
  font-family: var(--font-mono);
  transition: all 0.15s;
}
.mgHeaderBtns button:hover {
  border-color: var(--red-core);
  color: var(--red-core);
}
.mgCanvasWrap {
  position: relative;
  flex: 1;
  min-height: 280px;
  overflow: hidden;
}
.mgCanvas {
  cursor: grab;
  display: block;
}
.mgCanvas:active {
  cursor: grabbing;
}
.mgCoords {
  position: absolute;
  top: 8px;
  left: 8px;
  background: color-mix(in srgb, var(--bg-inset) 70%, transparent);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 10px;
  color: var(--red-core);
  pointer-events: none;
  font-family: var(--font-mono);
}
.mgFunctions {
  max-height: 120px;
  overflow-y: auto;
  border-top: 1px solid var(--border-cut);
  padding: 4px 0;
  flex-shrink: 0;
}
.mgFnRow {
  display: grid;
  grid-template-columns: 14px 1fr auto auto;
  gap: 8px;
  align-items: center;
  padding: 4px 12px;
  font-size: 12px;
}
.mgFnRow.hidden .mgFnExpr {
  opacity: 0.4;
  text-decoration: line-through;
}
.mgFnDot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  box-shadow: none;
}
.mgFnExpr {
  font-family: var(--font-mono);
  color: var(--text-blaze);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.mgFnToggle,
.mgFnDel {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 12px;
  padding: 2px 6px;
}
.mgFnToggle:hover,
.mgFnDel:hover {
  color: var(--red-core);
}
.mgInputRow {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-top: 1px solid var(--border-cut);
  flex-shrink: 0;
}
.mgInputPrefix {
  color: var(--red-core);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
}
.mgInput {
  flex: 1;
  background: var(--bg-abyss);
  border: 1px solid var(--border-cut);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  color: var(--text-blaze);
  font-family: var(--font-mono);
  font-size: 13px;
  outline: none;
}
.mgInput:focus {
  border-color: var(--red-core);
  box-shadow: var(--glow-sm);
}
.mgAdd {
  padding: 6px 14px;
  background: transparent;
  border: 1px solid var(--red-core);
  border-radius: var(--radius-sm);
  color: var(--red-core);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: 0.02em;
}
.mgAdd:hover {
  background: var(--red-core);
  color: var(--bg-void);
}
.mgError {
  padding: 0 12px 10px;
  color: var(--accent-text);
  font-size: 11px;
  font-family: var(--font-mono);
  min-height: 16px;
}