.calculator-root {
  --bg: #ececec;
  --panel: #f4f4f4;
  --card: #f5f5f5;
  --ink: #11151c;
  --muted: #606f80;
  --edge: #cfd2d6;
  --edge-strong: #b9bdc2;
  --green: #05a84b;
  --green-soft: #c8e2c2;
  --orange: #f59d4c;
  --dark: #15181f;
  --dark-soft: #1b1e25;
  --danger: #ef2936;
  --warn: #f68012;
  --radius-xl: 16px;
  --radius-lg: 12px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --surface-1: #f7f7f8;
  --surface-2: #eceef1;
  --surface-3: #e4e8ec;
  --ink-strong: #0f1520;
  --glow-green: rgba(5, 168, 75, 0.28);
  margin: 0 auto;
  width: min(960px, 100%);
  padding: 0;
  background: transparent;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  overflow-x: hidden;
}

.calculator-root *,
.calculator-root *::before,
.calculator-root *::after {
  box-sizing: border-box;
}

.calculator-root button,
.calculator-root input,
.calculator-root select,
.calculator-root textarea {
  font: inherit;
  margin: 0 !important;
}

.app-shell {
  width: 100%;
  max-width: 960px;
  margin: 0;
  border: 1px solid #c4c9cf;
  border-radius: 18px;
  background: radial-gradient(140% 120% at 0% 0%, #fafbfc 0%, #eef1f4 50%, #e7eaee 100%);
  box-shadow: 0 16px 34px rgba(15, 21, 32, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.95);
  overflow: hidden;
}

.app-header {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 8px;
  padding: 10px 12px 8px;
  border-bottom: 1px solid #d8dde3;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.6), rgba(247, 249, 251, 0.15));
}

.header-copy {
  min-width: 0;
}

.app-header .site-title {
  margin: 0;
  font-size: clamp(1.55rem, 3.2vw, 2.25rem);
  font-weight: 800;
  line-height: 1;
  color: var(--ink-strong);
  letter-spacing: -0.01em;
}

.app-header p {
  margin: 4px 0 0;
  color: #4f637b;
  font-size: 0.8rem;
}

.angle-toggle {
  display: inline-flex;
  gap: 4px;
  padding: 1px;
  border: 1px solid var(--edge);
  border-radius: 8px;
  background: #f7f7f7;
}

.angle-toggle-inline {
  margin-left: auto;
}

.toggle-btn {
  border: 0;
  border-radius: 7px;
  min-width: 40px;
  padding: 4px 8px;
  font-weight: 800;
  font-size: 0.8rem;
  letter-spacing: 0;
  line-height: 1;
  color: #556272;
  background: transparent;
  cursor: pointer;
}

.toggle-btn.active {
  color: #fff;
  background: var(--green);
}

.mode-nav-wrap {
  margin: 0 8px;
}

.mobile-nav-toggle {
  display: none;
  width: 100%;
  border: 1px solid #40444c;
  border-radius: 12px;
  min-height: 42px;
  padding: 8px 12px;
  color: #f3f6fb;
  background: linear-gradient(96deg, #171a21, #1a1d25 45%, #14171d);
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  cursor: pointer;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mobile-nav-toggle-label {
  display: inline-block;
}

.hamburger {
  position: relative;
  width: 20px;
  height: 2px;
  background: #f3f6fb;
  border-radius: 999px;
  transition: background 0.2s ease;
}

.hamburger::before,
.hamburger::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: #f3f6fb;
  border-radius: 999px;
  transition: transform 0.2s ease, top 0.2s ease, bottom 0.2s ease;
}

.hamburger::before {
  top: -6px;
}

.hamburger::after {
  bottom: -6px;
}

.mobile-nav-toggle.active .hamburger {
  background: transparent;
}

.mobile-nav-toggle.active .hamburger::before {
  top: 0;
  transform: rotate(45deg);
}

.mobile-nav-toggle.active .hamburger::after {
  bottom: 0;
  transform: rotate(-45deg);
}

.mode-nav {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 3px;
  margin: 0;
  padding: 5px 6px;
  border: 1px solid #363b45;
  border-bottom: 0;
  border-radius: 12px 12px 0 0;
  background: linear-gradient(100deg, #141822, #1a202b 50%, #131722);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.mode-btn {
  border: 1px solid #40444c;
  border-radius: 9px;
  min-height: 28px;
  padding: 4px 6px;
  color: #f3f6fb;
  background: linear-gradient(90deg, #20232b, #181b22);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  white-space: nowrap;
  transition: transform 0.1s ease, box-shadow 0.16s ease, filter 0.16s ease;
}

.mode-btn.active {
  background: linear-gradient(180deg, #12bf63 0%, #049646 100%);
  border-color: transparent;
  box-shadow: 0 0 0 1px rgba(4, 150, 70, 0.25), 0 0 14px var(--glow-green);
}

.mode-btn:hover {
  filter: brightness(1.06);
  transform: translateY(-1px);
}

.mode-btn:first-child {
  border-top-left-radius: 11px;
  border-bottom-left-radius: 11px;
}

.mode-btn:last-child {
  border-top-right-radius: 11px;
  border-bottom-right-radius: 11px;
}

.mode-icon {
  font-size: 0.62rem;
  opacity: 0.92;
}

.calculator-root .format-toolbar {
  margin: 4px 10px 6px;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 6px;
}

.calculator-root .format-control {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: #4e5f78;
}

.calculator-root .format-select {
  min-height: 24px;
  border: 1px solid #c4cad2;
  border-radius: 8px;
  padding: 2px 24px 2px 8px;
  background: #f8fafc;
  color: #1e2a3b;
  font-size: 0.76rem;
  font-weight: 700;
}

@media (max-width: 1040px) {
  .calculator-root .format-toolbar {
    margin: 4px 6px 6px;
    justify-content: flex-start;
  }

  .calculator-root .format-control {
    font-size: 0.64rem;
  }

  .calculator-root .format-select {
    min-height: 22px;
    font-size: 0.74rem;
  }
}

@media (max-width: 760px) {
  .calculator-root .format-toolbar {
    margin: 3px 6px 5px;
    gap: 5px;
  }

  .calculator-root .format-control {
    font-size: 0.6rem;
    letter-spacing: 0.06em;
  }

  .calculator-root .format-select {
    min-height: 21px;
    padding: 1px 20px 1px 6px;
    font-size: 0.7rem;
  }
}

.panel {
  display: none;
  padding: 8px;
  border: 1px solid #d3d9df;
  border-top: 0;
  background: linear-gradient(180deg, #f4f6f8 0%, #eff2f5 100%);
  overflow: hidden;
  min-width: 0;
}

.panel.active {
  display: block;
}

.lcd {
  border: 1px solid #89a88f;
  border-radius: var(--radius-lg);
  padding: 6px 8px;
  background: linear-gradient(180deg, #d4e8cf 0%, #c4ddb9 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.65);
}

.lcd-head {
  display: flex;
  justify-content: space-between;
  gap: 8px;
}

.chip-wrap {
  display: flex;
  gap: 6px;
}

.chip {
  border: 1px solid #9fb7a1;
  border-radius: 7px;
  min-height: 20px;
  min-width: 30px;
  padding: 1px 6px;
  background: #dfebdb;
  color: #485949;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: "Courier New", Consolas, monospace;
  font-size: 0.78rem;
  font-weight: 700;
}

.chip-btn {
  cursor: pointer;
}

.chip-green {
  color: var(--green);
  border-color: #79b784;
  background: #d4ebd3;
}

.lcd-expression,
.lcd-result {
  text-align: right;
  color: #4f614e;
  font-family: "Courier New", Consolas, monospace;
}

.lcd-expression {
  min-height: 28px;
  padding-top: 4px;
  font-size: clamp(1rem, 2vw, 1.45rem);
}

.lcd-result {
  min-height: 34px;
  font-size: clamp(1.35rem, 2.7vw, 1.95rem);
  font-weight: 800;
}

.kbd-hint {
  margin-top: 6px;
  border: 1px solid var(--edge);
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-size: 0.82rem;
  padding: 6px 8px;
}

.pad-wrap {
  margin-top: 6px;
  display: grid;
  grid-template-columns: 1.55fr 1fr;
  gap: 6px;
}

.pad {
  border: 1px solid #d0d5db;
  border-radius: var(--radius-lg);
  padding: 6px;
  background: linear-gradient(180deg, var(--surface-1) 0%, var(--surface-2) 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.95), 0 2px 6px rgba(16, 22, 34, 0.06);
}

.pad-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  color: #4d5e76;
  font-weight: 800;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
  font-size: 0.76rem;
}

.grid {
  display: grid;
  gap: 4px;
}

.grid-fn {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.grid-num {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.key {
  border: 1px solid #b8bdc2;
  border-radius: 8px;
  background: linear-gradient(180deg, #ffffff 0%, #eaedf2 100%);
  color: var(--ink);
  min-height: 36px;
  font-size: 0.86rem;
  line-height: 1;
  font-weight: 800;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.92), 0 2px 0 #b2b8be, 0 3px 6px rgba(0, 0, 0, 0.1);
  transition: transform 0.06s ease, box-shadow 0.06s ease, filter 0.1s ease;
}

.key:hover {
  filter: brightness(0.985);
}

.key:active {
  transform: translateY(1px);
  box-shadow: 0 1px 0 #aab1b8, 0 2px 4px rgba(0, 0, 0, 0.15);
}

.key sup,
.key sub {
  font-size: 0.62em;
  line-height: 0;
}

.key.dark {
  background: linear-gradient(180deg, #1f232c 0%, #11141a 100%);
  border-color: #1f232a;
  color: #f4f7fd;
  box-shadow: 0 2px 0 #0b0d11, 0 4px 7px rgba(0, 0, 0, 0.26);
}

.key.danger {
  background: linear-gradient(180deg, #ff4b56 0%, #d31c29 100%);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 2px 0 #a8151f, 0 4px 7px rgba(0, 0, 0, 0.2);
}

.key.warn {
  background: linear-gradient(180deg, #ffa54c 0%, #de7000 100%);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 2px 0 #b25800, 0 4px 7px rgba(0, 0, 0, 0.2);
}

.key.ok {
  background: linear-gradient(180deg, #15bf62 0%, #048f3f 100%);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 2px 0 #04662d, 0 4px 7px rgba(0, 0, 0, 0.2);
}

.card {
  border: 1px solid #d2d8df;
  border-radius: var(--radius-lg);
  padding: 10px;
  background: linear-gradient(180deg, #f9fafb 0%, #f2f4f7 100%);
  margin-bottom: 10px;
  min-width: 0;
  overflow: hidden;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.92);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.14rem;
  letter-spacing: 0.03em;
}

.card p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.card-soft {
  background: #f2f4f4;
}

.card-green {
  border-color: #9fd0af;
  background: #e9f3ec;
}

.card-orange {
  border-color: #f2bc92;
  background: #f8f1ea;
}

.card-select {
  text-align: left;
  cursor: pointer;
}

.card-select strong {
  display: block;
  font-size: 1.2rem;
}

.card-select span {
  color: var(--muted);
}

.card-select.active {
  border-color: var(--green);
  background: #e2efe7;
}

.app-shell input,
.app-shell select,
.app-shell textarea {
  width: 100%;
  border: 1px solid #cbd0d4;
  border-radius: var(--radius-sm);
  background: #f8f9fb;
  color: var(--ink);
  padding: 7px 9px;
  font-size: 1rem;
  box-shadow: inset 0 1px 1px rgba(10, 16, 24, 0.04);
}

.split > * {
  min-width: 0;
}

.app-shell input:focus,
.app-shell select:focus,
.app-shell textarea:focus {
  outline: 2px solid #7bc797;
  outline-offset: 1px;
}

.app-shell textarea {
  resize: vertical;
}

.calc-row {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  flex-wrap: wrap;
}

.calc-row > * {
  min-width: 0;
}

.card-head .calc-row {
  flex-wrap: nowrap;
}

.card-head .calc-row > select {
  width: 68px;
  min-width: 68px;
  flex: 0 0 auto;
}

.card-head .calc-row > span {
  white-space: nowrap;
}

.card-head.matrix-head {
  flex-wrap: nowrap;
  align-items: center;
}

.card-head.matrix-head .matrix-title {
  margin: 0;
  white-space: nowrap;
  flex: 0 0 auto;
}

.card-head.matrix-head .matrix-size-row {
  flex-wrap: nowrap !important;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  flex: 1 1 auto;
  min-width: 0;
}

.card-head.matrix-head .matrix-size-label,
.card-head.matrix-head .matrix-size-times {
  white-space: nowrap;
  flex: 0 0 auto;
}

.card-head.matrix-head .matrix-size-row > select {
  width: 72px !important;
  min-width: 72px !important;
  max-width: 72px !important;
  flex: 0 0 72px !important;
}

.calc-row-gap {
  margin-bottom: 10px;
}

.calc-row.calc-row-gap {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  align-items: end;
}

.calc-row.calc-row-gap > label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
  width: 100%;
  position: static !important;
  left: auto !important;
  transform: none !important;
  text-indent: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
  overflow: visible !important;
}

.calc-row.calc-row-gap > label > select,
.calc-row.calc-row-gap > label > input {
  width: 100%;
  min-width: 0;
}

.app-shell .site-title,
.app-shell h3,
.app-shell label,
.app-shell .label,
.app-shell .card strong,
.app-shell .card h3,
.app-shell .card-head h3 {
  color: var(--ink) !important;
  text-shadow: none !important;
}

.app-shell p,
.app-shell .card p,
.app-shell .card-select span,
.app-shell .stat-cell .name {
  color: var(--muted) !important;
}

.app-shell select,
.app-shell input,
.app-shell textarea {
  color: var(--ink) !important;
  text-indent: 0 !important;
  padding-left: 10px !important;
  transform: none !important;
}

.app-shell .mode-btn,
.app-shell .mode-btn .mode-icon,
.app-shell .status-bar,
.app-shell .key.dark,
.app-shell .btn.ok,
.app-shell .btn.dark,
.app-shell .pill.active,
.app-shell .panel-stats .segment-btn.active {
  color: #fff !important;
}

.split {
  display: grid;
  gap: 10px;
  margin-bottom: 10px;
}

.split.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.split.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.btn {
  border: 1px solid #c6ccd1;
  border-radius: 9px;
  background: linear-gradient(180deg, #ffffff 0%, #eceff3 100%);
  color: var(--ink);
  padding: 8px 14px;
  font-weight: 700;
  cursor: pointer;
}

.btn:hover {
  filter: brightness(0.985);
}

.btn.ok {
  border-color: transparent;
  color: #fff;
  background: linear-gradient(180deg, #12bf63 0%, #049646 100%);
  box-shadow: 0 0 0 1px rgba(4, 150, 70, 0.2), 0 6px 14px rgba(5, 168, 75, 0.25);
}

.btn.dark {
  border-color: transparent;
  color: #fff;
  background: #14161b;
}

.btn.wide {
  width: 100%;
  margin-top: 10px;
}

.btn.icon {
  min-width: 86px;
}

.btn.mini {
  padding: 4px 10px;
  border-radius: 7px;
  font-size: 0.86rem;
}

.action-row {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}

.result-box {
  border: 1px solid #86a483;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, #cde5c8 0%, #c0ddb9 100%);
  padding: 10px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.result-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  color: #4e5e5d;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-family: "Courier New", Consolas, monospace;
  font-size: 0.95rem;
  margin-bottom: 8px;
}

.result-main {
  min-height: 34px;
  font-size: clamp(1.05rem, 2.1vw, 1.45rem);
  font-weight: 800;
}

.result-pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: "Courier New", Consolas, monospace;
  font-size: 1rem;
}

#matrixResult {
  min-height: 38px;
  overflow: auto;
}

#matrixResult.matrix-render {
  white-space: normal;
  word-break: normal;
  display: flex;
  justify-content: center;
}

.matrix-bracket {
  display: inline-flex;
  align-items: stretch;
  padding: 2px 12px;
}

.matrix-bracket::before,
.matrix-bracket::after {
  content: "";
  width: 10px;
  align-self: stretch;
  flex: 0 0 auto;
  border-top: 2px solid #4f585f;
  border-bottom: 2px solid #4f585f;
}

.matrix-bracket::before {
  border-left: 2px solid #4f585f;
  margin-right: 10px;
}

.matrix-bracket::after {
  border-right: 2px solid #4f585f;
  margin-left: 10px;
}

.matrix-body {
  display: grid;
  gap: 6px;
}

.matrix-row {
  display: flex;
  justify-content: center;
  gap: 12px;
}

.matrix-cell {
  min-width: 64px;
  text-align: center;
  font-family: "Courier New", Consolas, monospace;
  font-weight: 700;
}

#matrixResult.matrix-error {
  color: #9f1a25;
}

.vector-grid,
.matrix-grid,
.equation-grid,
.poly-grid,
#regressionRows {
  display: grid;
  gap: 8px;
}

.vector-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.matrix-grid {
  grid-template-columns: repeat(var(--matrix-cols, 2), minmax(0, 1fr));
}

.equation-row {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.equation-row input {
  width: 76px;
}

.poly-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.poly-grid input {
  width: 92px;
  flex: 0 0 auto;
}

.poly-grid span {
  white-space: nowrap;
}

.panel-stats {
  padding-top: 10px;
}

.panel-stats .stats-shell {
  display: grid;
  gap: 10px;
}

.panel-stats .stats-switch-card {
  margin: 0;
  padding: 8px;
  border-radius: 12px;
}

.panel-stats .segment {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
  margin: 0;
  padding: 3px;
  border: 1px solid var(--edge);
  border-radius: 10px;
  background: #f7f7f7;
}

.panel-stats .segment-btn {
  border: 0;
  border-radius: 8px;
  min-height: 34px;
  background: transparent;
  color: #5f6877;
  font-size: 0.95rem;
  font-weight: 800;
  cursor: pointer;
}

.panel-stats .segment-btn.active {
  background: var(--green);
  color: #fff;
}

.panel-stats .stats-pane {
  display: none;
}

.panel-stats .stats-pane.active {
  display: grid;
  gap: 10px;
}

.panel-stats .stats-data-cards {
  margin-bottom: 0;
}

.panel-stats .stats-result-box {
  margin: 0;
}

.panel-stats .label {
  color: #5b6776;
  letter-spacing: 0.08em;
  margin: 0 0 8px;
  font-size: 1.02rem;
}

.pill-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.pill {
  border: 1px solid #cad2d6;
  border-radius: 999px;
  padding: 5px 11px;
  background: #f2f2f2;
  color: #2f3f55 !important;
  font-weight: 700;
  font-size: 0.93rem;
  cursor: pointer;
}

.pill.active {
  border-color: transparent;
  color: #fff;
  background: var(--green);
}

.calculator-root .pill:not(.active) {
  color: #2f3f55 !important;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 7px;
}

.stat-cell {
  border: 1px solid var(--edge);
  border-radius: 9px;
  background: #f5f5f5;
  padding: 8px;
}

.stat-cell .name {
  color: var(--muted);
  margin-bottom: 2px;
  font-size: 0.86rem;
}

.stat-cell .value {
  font-family: "Courier New", Consolas, monospace;
  font-size: 1.08rem;
  font-weight: 800;
}

.regression-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
}

.regression-row > button {
  white-space: nowrap;
}

.regression-layout {
  display: grid;
  gap: 8px;
}

.regression-equation {
  border: 1px solid #bcd9ba;
  border-radius: 9px;
  background: #eef7ed;
  padding: 8px;
}

.regression-equation .name {
  font-family: "Courier New", Consolas, monospace;
  font-size: 0.84rem;
  color: #506457;
  letter-spacing: 0.1em;
}

.regression-equation .value {
  margin-top: 3px;
  font-family: "Courier New", Consolas, monospace;
  font-size: 1.2rem;
  font-weight: 800;
}

.regression-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
}

.reg-metric {
  border: 1px solid #b6d4b8;
  border-radius: 9px;
  background: #edf6ec;
  padding: 7px 8px;
}

.reg-metric .name {
  color: #5f6f67;
  font-size: 0.83rem;
}

.reg-metric .value {
  margin-top: 1px;
  font-family: "Courier New", Consolas, monospace;
  font-size: 1.1rem;
  font-weight: 800;
}

.regression-predict {
  border: 1px solid #b6d4b8;
  border-radius: 9px;
  background: #edf6ec;
  padding: 8px;
}

.regression-predict label {
  display: block;
  color: #5b6a63;
  letter-spacing: 0.08em;
  font-family: "Courier New", Consolas, monospace;
  font-size: 0.83rem;
  margin-bottom: 5px;
}

.predict-row {
  display: grid;
  grid-template-columns: 1fr 140px;
  gap: 6px;
}

.predict-value {
  border: 1px solid #9fc9a7;
  border-radius: 8px;
  background: #e8f3ea;
  padding: 6px 8px;
  text-align: right;
}

.predict-value div {
  font-size: 0.78rem;
  color: #5e6f64;
}

.predict-value strong {
  font-family: "Courier New", Consolas, monospace;
  font-size: 1.2rem;
}

.status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 9px 12px;
  color: #e2e8f6;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  font-family: "Courier New", Consolas, monospace;
  background: linear-gradient(100deg, #171a20, #24262a 55%, #171a20);
  border-top: 1px solid #272a31;
  font-size: 0.84rem;
}

.history-modal {
  position: fixed;
  inset: 0;
  background: rgba(11, 13, 18, 0.48);
  display: grid;
  place-items: center;
  padding: 12px;
  z-index: 20;
}

.history-modal[hidden] {
  display: none !important;
}

.history-card {
  width: min(690px, 100%);
  border: 1px solid #20242c;
  border-radius: 14px;
  background: #11151d;
  color: #eef3ff;
  padding: 12px;
}

.history-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
  max-height: 320px;
  overflow: auto;
}

.history-card li {
  border-bottom: 1px solid #292e38;
  padding: 7px 4px;
  font-family: "Courier New", Consolas, monospace;
}

.hidden {
  display: none !important;
}

@media (max-width: 1040px) {
  .calculator-root {
    width: 100%;
    padding: 0;
    min-height: 0;
    overflow: visible;
  }

  .app-shell {
    width: 100%;
    height: auto;
    display: block;
  }

  .app-header {
    padding: 7px 9px 6px;
  }

  .app-header .site-title {
    font-size: clamp(1.35rem, 2.5vw, 1.9rem);
  }

  .app-header p {
    font-size: 0.7rem;
  }

  .mode-nav-wrap {
    margin: 0 4px 4px;
  }

  .mobile-nav-toggle {
    display: flex;
    min-height: 34px;
    padding: 6px 9px;
    font-size: 0.76rem;
  }

  .mode-nav {
    display: none;
    grid-template-columns: 1fr;
    gap: 6px;
    margin-top: 6px;
    padding: 8px;
    border: 1px solid #474b52;
    border-radius: 14px;
    background: linear-gradient(96deg, #171a21, #1a1d25 45%, #14171d);
  }

  .mode-nav.open {
    display: grid;
  }

  .mode-btn {
    width: 100%;
    min-width: 0;
    min-height: 31px;
    justify-content: flex-start;
    padding: 6px 8px;
    font-size: 0.72rem;
    border-radius: 8px;
  }

  .mode-icon {
    font-size: 0.58rem;
  }

  .panel.active {
    min-height: auto;
    overflow: auto;
    padding: 7px;
    border-top: 1px solid var(--edge);
    border-radius: 12px;
  }

  .panel-stats {
    padding-top: 8px;
  }

  .panel-stats .stats-switch-card {
    margin-top: 0;
  }

  .panel-stats .segment-btn {
    min-height: 29px;
    font-size: 0.8rem;
  }

  .panel[data-panel="calculate"].active {
    display: block;
    overflow: auto;
  }

  .panel[data-panel="calculate"] .lcd {
    padding: 5px 7px;
  }

  .panel[data-panel="calculate"] .lcd-expression {
    min-height: 24px;
    font-size: clamp(0.9rem, 2vw, 1.2rem);
  }

  .panel[data-panel="calculate"] .lcd-result {
    min-height: 28px;
    font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  }

  .panel[data-panel="calculate"] .kbd-hint {
    margin-top: 5px;
    padding: 5px 8px;
    font-size: 0.72rem;
  }

  .panel[data-panel="calculate"] .pad-wrap {
    margin-top: 6px;
    grid-template-columns: 1.3fr 1fr;
    gap: 5px;
    flex: 0 0 auto;
    min-height: auto;
  }

  .panel[data-panel="calculate"] .pad {
    padding: 5px;
  }

  .panel[data-panel="calculate"] .pad-head {
    margin-bottom: 6px;
    font-size: 0.66rem;
    letter-spacing: 0.08em;
  }

  .panel[data-panel="calculate"] .grid {
    gap: 3px;
  }

  .panel[data-panel="calculate"] .grid-fn {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .panel[data-panel="calculate"] .grid-num {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .panel[data-panel="calculate"] .key {
    min-height: 28px;
    font-size: 0.68rem;
    border-radius: 6px;
  }

  .panel[data-panel="calculate"] .key sup,
  .panel[data-panel="calculate"] .key sub {
    font-size: 0.56em;
  }

  .status-bar {
    padding: 5px 8px;
    font-size: 0.68rem;
    letter-spacing: 0.07em;
  }

  .split.three,
  .stats-grid,
  .regression-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .card-head .calc-row {
    flex-wrap: wrap;
    justify-content: flex-end;
  }
}

@media (max-width: 760px) {
  .app-header {
    padding: 5px 7px;
    gap: 5px;
  }

  .app-header .site-title {
    font-size: 1.4rem;
  }

  .app-header p {
    display: none;
  }

  .mobile-nav-toggle {
    min-height: 33px;
    padding: 6px 8px;
    font-size: 0.72rem;
    border-radius: 8px;
  }

  .mode-btn {
    min-height: 29px;
    font-size: 0.64rem;
    padding: 5px 7px;
  }

  .mode-icon {
    display: none;
  }

  .panel {
    padding: 5px;
  }

  .panel-stats {
    padding-top: 6px;
  }

  .panel-stats .stats-switch-card {
    margin-top: 0;
    padding: 6px;
  }

  .panel-stats .segment {
    grid-template-columns: 1fr;
  }

  .panel-stats .segment-btn {
    min-height: 27px;
    font-size: 0.74rem;
  }

  .chip {
    min-height: 17px;
    min-width: 26px;
    padding: 0 5px;
    font-size: 0.66rem;
  }

  .panel[data-panel="calculate"] .lcd {
    padding: 4px 6px;
  }

  .panel[data-panel="calculate"] .lcd-expression {
    min-height: 20px;
    font-size: 0.82rem;
    padding-top: 2px;
  }

  .panel[data-panel="calculate"] .lcd-result {
    min-height: 24px;
    font-size: 1.02rem;
  }

  .panel[data-panel="calculate"] .kbd-hint {
    display: none;
  }

  .panel[data-panel="calculate"] .pad-wrap {
    grid-template-columns: 1fr;
    gap: 4px;
    margin-top: 4px;
  }

  .panel[data-panel="calculate"] .pad {
    padding: 4px;
  }

  .panel[data-panel="calculate"] .pad-head {
    margin-bottom: 4px;
    font-size: 0.58rem;
    letter-spacing: 0.06em;
  }

  .panel[data-panel="calculate"] .angle-toggle {
    gap: 2px;
    padding: 1px;
    border-radius: 8px;
  }

  .panel[data-panel="calculate"] .toggle-btn {
    min-width: 34px;
    padding: 2px 6px;
    font-size: 0.63rem;
  }

  .panel[data-panel="calculate"] .grid {
    gap: 2px;
  }

  .panel[data-panel="calculate"] .key {
    min-height: 24px;
    font-size: 0.62rem;
    box-shadow: 0 1px 0 #b2b8be, 0 2px 5px rgba(0, 0, 0, 0.1);
  }

  .panel[data-panel="calculate"] .key sup,
  .panel[data-panel="calculate"] .key sub {
    font-size: 0.52em;
  }

  .split.two,
  .split.three,
  .stats-grid,
  .poly-grid,
  .regression-row,
  .regression-metrics {
    grid-template-columns: 1fr;
  }

  .vector-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .predict-row {
    grid-template-columns: 1fr;
  }

  .status-bar {
    display: none;
  }

  .matrix-cell {
    min-width: 52px;
  }

  .card-head .calc-row > select {
    width: 64px;
    min-width: 64px;
  }

  .card-head.matrix-head .matrix-size-row > select {
    width: 58px !important;
    min-width: 58px !important;
    max-width: 58px !important;
    flex-basis: 58px !important;
  }

  .poly-grid input {
    width: 78px;
  }
}

@media (max-width: 430px) {
  .app-header {
    padding: 4px 6px;
  }

  .app-header .site-title {
    font-size: 1.26rem;
  }

  .mode-btn {
    min-height: 27px;
    font-size: 0.6rem;
    padding: 4px 6px;
  }

  .panel[data-panel="calculate"] .pad-head {
    font-size: 0.54rem;
  }

  .panel[data-panel="calculate"] .key {
    min-height: 22px;
    font-size: 0.58rem;
  }

  .panel[data-panel="calculate"] .lcd-expression {
    font-size: 0.76rem;
  }

  .panel[data-panel="calculate"] .lcd-result {
    font-size: 0.95rem;
  }
}

.calculator-root .calc-row,
.calculator-root .calc-row.calc-row-gap {
  margin-left: 0 !important;
  margin-right: 0 !important;
  width: 100%;
}

.calculator-root .calc-row > *,
.calculator-root .calc-row.calc-row-gap > * {
  max-width: 100%;
}

.calculator-root .calc-row.calc-row-gap > label {
  padding-left: 0 !important;
  padding-right: 0 !important;
  margin-left: 0 !important;
  margin-right: 0 !important;
}

/* WordPress / Elementor hard isolation layer */
.calculator-root .app-shell {
  width: 100% !important;
  max-width: 960px !important;
  margin: 0 !important;
}

.calculator-root .app-shell,
.calculator-root .app-shell * {
  box-sizing: border-box !important;
}

.calculator-root .app-shell button,
.calculator-root .app-shell input,
.calculator-root .app-shell select,
.calculator-root .app-shell textarea {
  font-family: Georgia, "Times New Roman", serif !important;
  font-weight: inherit !important;
  line-height: 1.1 !important;
  text-transform: none !important;
  letter-spacing: normal !important;
}

.calculator-root .app-shell button::before,
.calculator-root .app-shell button::after {
  content: none !important;
  display: none !important;
}

.calculator-root .mode-btn,
.calculator-root .toggle-btn,
.calculator-root .key,
.calculator-root .btn,
.calculator-root .mobile-nav-toggle {
  text-align: center !important;
  align-items: center !important;
  float: none !important;
  text-indent: 0 !important;
}

.calculator-root .mode-btn {
  min-height: 28px !important;
  padding: 4px 6px !important;
  font-size: 12px !important;
  justify-content: center !important;
  width: auto !important;
}

.calculator-root .toggle-btn {
  min-width: 40px !important;
  padding: 4px 8px !important;
  font-size: 12px !important;
  justify-content: center !important;
}

.calculator-root .key {
  min-height: 36px !important;
  padding: 0 !important;
  font-size: 13px !important;
  justify-content: center !important;
  width: 100% !important;
}

.calculator-root .btn {
  min-height: 32px !important;
  padding: 6px 12px !important;
  font-size: 13px !important;
  justify-content: center !important;
}

.calculator-root .chip {
  min-height: 20px !important;
  padding: 1px 6px !important;
  font-size: 12px !important;
}

.calculator-root .panel[data-panel="calculate"] .lcd-expression {
  font-size: clamp(15px, 1.8vw, 22px) !important;
}

.calculator-root .panel[data-panel="calculate"] .lcd-result {
  font-size: clamp(20px, 2.5vw, 31px) !important;
}

@media (max-width: 1040px) {
  .calculator-root .mode-btn {
    min-height: 31px !important;
    padding: 6px 8px !important;
    font-size: 11px !important;
    justify-content: center !important;
    width: 100% !important;
  }

  .calculator-root .key {
    min-height: 28px !important;
    font-size: 11px !important;
  }

  .calculator-root .toggle-btn {
    min-width: 34px !important;
    padding: 3px 7px !important;
    font-size: 11px !important;
  }
}

@media (max-width: 760px) {
  .calculator-root .mode-btn {
    min-height: 29px !important;
    padding: 5px 7px !important;
    font-size: 10px !important;
    justify-content: center !important;
    width: 100% !important;
  }

  .calculator-root .key {
    min-height: 24px !important;
    font-size: 10px !important;
  }

  .calculator-root .toggle-btn {
    min-width: 30px !important;
    padding: 2px 6px !important;
    font-size: 10px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-expression {
    font-size: 13px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-result {
    font-size: 16px !important;
  }
}

@media print {
/* Final compact size lock for WordPress themes */
.calculator-root .app-shell {
  max-width: 880px !important;
}

.calculator-root .app-header {
  padding: 8px 10px 6px !important;
}

.calculator-root .app-header .site-title {
  font-size: clamp(26px, 2.4vw, 34px) !important;
}

.calculator-root .app-header p {
  font-size: 12px !important;
}

.calculator-root .mode-nav {
  gap: 2px !important;
  padding: 4px 5px !important;
}

.calculator-root .mode-btn {
  min-height: 24px !important;
  padding: 3px 5px !important;
  font-size: 11px !important;
  border-radius: 8px !important;
}

.calculator-root .mode-icon {
  font-size: 10px !important;
}

.calculator-root .panel {
  padding: 6px !important;
}

.calculator-root .panel[data-panel="calculate"] .lcd {
  padding: 4px 6px !important;
}

.calculator-root .panel[data-panel="calculate"] .lcd-expression {
  min-height: 20px !important;
  font-size: 13px !important;
}

.calculator-root .panel[data-panel="calculate"] .lcd-result {
  min-height: 24px !important;
  font-size: 20px !important;
}

.calculator-root .chip {
  min-height: 17px !important;
  min-width: 24px !important;
  padding: 0 4px !important;
  font-size: 10px !important;
}

.calculator-root .toggle-btn {
  min-width: 30px !important;
  min-height: 22px !important;
  padding: 2px 5px !important;
  font-size: 10px !important;
  border-radius: 6px !important;
}

.calculator-root .pad-wrap {
  gap: 5px !important;
}

.calculator-root .pad {
  padding: 4px !important;
}

.calculator-root .pad-head {
  margin-bottom: 4px !important;
  font-size: 10px !important;
}

.calculator-root .grid {
  gap: 2px !important;
}

.calculator-root .key {
  min-height: 28px !important;
  font-size: 12px !important;
  border-radius: 6px !important;
}

.calculator-root .btn {
  min-height: 28px !important;
  padding: 4px 9px !important;
  font-size: 12px !important;
}

@media (max-width: 1040px) {
  .calculator-root .app-shell {
    max-width: 100% !important;
  }

  .calculator-root .app-header .site-title {
    font-size: 24px !important;
  }

  .calculator-root .mode-btn {
    min-height: 23px !important;
    font-size: 10px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-expression {
    font-size: 12px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-result {
    font-size: 17px !important;
  }

  .calculator-root .key {
    min-height: 24px !important;
    font-size: 10px !important;
  }
}

@media (max-width: 760px) {
  .calculator-root .app-header .site-title {
    font-size: 21px !important;
  }

  .calculator-root .mobile-nav-toggle {
    min-height: 30px !important;
    font-size: 10px !important;
    padding: 5px 7px !important;
  }

  .calculator-root .mode-btn {
    min-height: 21px !important;
    font-size: 9px !important;
    padding: 3px 5px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-expression {
    font-size: 11px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-result {
    font-size: 15px !important;
  }

  .calculator-root .toggle-btn {
    min-width: 25px !important;
    min-height: 19px !important;
    font-size: 9px !important;
  }

  .calculator-root .key {
    min-height: 22px !important;
    font-size: 9px !important;
  }
}

/* Extra mobile-only compact layer (phones only) */
@media (max-width: 760px) {
  .calculator-root {
    width: 100% !important;
    max-width: 100% !important;
  }

  .calculator-root .app-shell {
    max-width: 100% !important;
  }

  .calculator-root .app-header {
    padding: 4px 6px !important;
  }

  .calculator-root .app-header .site-title {
    font-size: 18px !important;
  }

  .calculator-root .mode-nav-wrap {
    margin: 0 3px 3px !important;
  }

  .calculator-root .mobile-nav-toggle {
    min-height: 26px !important;
    padding: 4px 6px !important;
    font-size: 9px !important;
    border-radius: 7px !important;
  }

  .calculator-root .mode-nav {
    padding: 4px !important;
    gap: 2px !important;
  }

  .calculator-root .mode-btn {
    min-height: 18px !important;
    padding: 2px 4px !important;
    font-size: 8px !important;
    border-radius: 6px !important;
  }

  .calculator-root .panel {
    padding: 4px !important;
  }

  .calculator-root .card {
    padding: 7px !important;
    margin-bottom: 7px !important;
  }

  .calculator-root .card h3 {
    font-size: 14px !important;
    margin-bottom: 6px !important;
  }

  .calculator-root .app-shell input,
  .calculator-root .app-shell select,
  .calculator-root .app-shell textarea {
    padding: 5px 7px !important;
    font-size: 12px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd {
    padding: 3px 5px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-expression {
    min-height: 16px !important;
    font-size: 10px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-result {
    min-height: 20px !important;
    font-size: 13px !important;
  }

  .calculator-root .chip {
    min-height: 14px !important;
    min-width: 20px !important;
    padding: 0 3px !important;
    font-size: 8px !important;
  }

  .calculator-root .toggle-btn {
    min-width: 22px !important;
    min-height: 16px !important;
    padding: 1px 4px !important;
    font-size: 8px !important;
  }

  .calculator-root .pad-wrap {
    gap: 3px !important;
    margin-top: 3px !important;
  }

  .calculator-root .pad {
    padding: 3px !important;
  }

  .calculator-root .pad-head {
    margin-bottom: 3px !important;
    font-size: 8px !important;
  }

  .calculator-root .grid {
    gap: 2px !important;
  }

  .calculator-root .key {
    min-height: 18px !important;
    font-size: 8px !important;
    border-radius: 5px !important;
  }

  .calculator-root .btn {
    min-height: 22px !important;
    padding: 3px 7px !important;
    font-size: 10px !important;
  }

  .calculator-root .status-bar {
    display: none !important;
  }
}

@media (max-width: 600px) {
  .calculator-root .app-header .site-title {
    font-size: 17px !important;
  }

  .calculator-root .mode-btn {
    min-height: 17px !important;
    font-size: 7.5px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-result {
    font-size: 12px !important;
  }

  .calculator-root .key {
    min-height: 17px !important;
    font-size: 7.5px !important;
  }
}

@media (max-width: 430px) {
  .calculator-root .app-header .site-title {
    font-size: 16px !important;
  }

  .calculator-root .mode-btn {
    min-height: 16px !important;
    font-size: 7px !important;
    padding: 2px 3px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-expression {
    font-size: 9px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-result {
    font-size: 11px !important;
  }

  .calculator-root .key {
    min-height: 16px !important;
    font-size: 7px !important;
  }
}

/* Final phone fit tuning: prioritize input/output area */
@media (max-width: 760px) {
  .calculator-root .mode-nav-wrap {
    margin: 0 2px 2px !important;
  }

  .calculator-root .mobile-nav-toggle {
    min-height: 24px !important;
    height: 24px !important;
    padding: 2px 6px !important;
    font-size: 9px !important;
    border-radius: 6px !important;
  }

  .calculator-root .mode-nav {
    padding: 3px !important;
    gap: 1px !important;
  }

  .calculator-root .mode-btn {
    min-height: 18px !important;
    height: 18px !important;
    max-height: 18px !important;
    padding: 1px 4px !important;
    font-size: 8px !important;
    border-radius: 6px !important;
  }

  .calculator-root .mode-icon {
    font-size: 7px !important;
  }

  .calculator-root .panel {
    padding: 3px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd {
    padding: 2px 4px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-head {
    align-items: flex-start !important;
    gap: 3px !important;
    margin-bottom: 2px !important;
  }

  .calculator-root .chip {
    min-height: 13px !important;
    height: 13px !important;
    min-width: 18px !important;
    padding: 0 3px !important;
    font-size: 8px !important;
    border-radius: 5px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-expression {
    min-height: 16px !important;
    font-size: 12px !important;
    padding-top: 0 !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-result {
    min-height: 19px !important;
    font-size: 17px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .pad-wrap {
    gap: 2px !important;
    margin-top: 2px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .pad {
    padding: 2px !important;
    border-radius: 8px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .pad-head {
    margin-bottom: 2px !important;
    font-size: 9px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .angle-toggle {
    padding: 0 !important;
    gap: 1px !important;
    border-radius: 5px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .toggle-btn {
    min-width: 18px !important;
    min-height: 13px !important;
    height: 13px !important;
    padding: 0 3px !important;
    font-size: 7px !important;
    border-radius: 4px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .grid {
    gap: 1px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .grid-fn .key {
    min-height: 26px !important;
    height: 26px !important;
    max-height: 26px !important;
    font-size: 9px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .grid-num .key {
    min-height: 24px !important;
    height: 24px !important;
    max-height: 24px !important;
    font-size: 9px !important;
  }
}

/* Final math-input display balance tune */
.calculator-root .panel[data-panel="calculate"] .lcd {
  padding: 4px 6px !important;
}

.calculator-root .panel[data-panel="calculate"] .lcd-expression {
  min-height: 20px !important;
  font-size: 14px !important;
}

.calculator-root .panel[data-panel="calculate"] .lcd-result {
  min-height: 26px !important;
  font-size: 22px !important;
}

/* Keep overall size stable by trimming key/toggle footprint on desktop/tablet */
@media (min-width: 761px) {
  .calculator-root .panel[data-panel="calculate"] .toggle-btn {
    min-width: 22px !important;
    min-height: 16px !important;
    padding: 1px 4px !important;
    font-size: 9px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .key {
    min-height: 22px !important;
    font-size: 10px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .grid-fn .key {
    min-height: 24px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .grid-num .key {
    min-height: 22px !important;
  }
}

/* Mobile: increase display vertically (keys unchanged) */
@media (max-width: 760px) {
  .calculator-root .panel[data-panel="calculate"] .lcd {
    padding: 5px 7px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-expression {
    min-height: 24px !important;
    font-size: 15px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-result {
    min-height: 34px !important;
    font-size: 24px !important;
  }
}

/* Keep keypad labels visible even if theme overrides focused button styles */
.calculator-root .key:focus,
.calculator-root .key:focus-visible {
  color: inherit !important;
  -webkit-text-fill-color: currentColor !important;
}

/* Small mobile-only readability bump (display area only) */
@media (max-width: 760px) {
  .calculator-root .panel[data-panel="calculate"] .lcd {
    padding: 3px 5px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-expression {
    min-height: 17px !important;
    font-size: 13px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-result {
    min-height: 21px !important;
    font-size: 19px !important;
  }
}

/* Function-head tools (cursor + angle) */
.calculator-root .panel[data-panel="calculate"] .pad-head .fn-head-tools {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.calculator-root .panel[data-panel="calculate"] .pad-head .cursor-nav {
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

/* Real-calculator style cursor keys */
.calculator-root .panel[data-panel="calculate"] .key.nav-arrow {
  background: linear-gradient(180deg, #2a2f39 0%, #171b22 100%) !important;
  border-color: #1e232b !important;
  color: #f2f6ff !important;
  font-size: 0.95em !important;
  font-weight: 900 !important;
  box-shadow: 0 2px 0 #0d1015, 0 4px 7px rgba(0, 0, 0, 0.25) !important;
}

.calculator-root .panel[data-panel="calculate"] .key.nav-arrow:hover {
  filter: brightness(1.08) !important;
}

.calculator-root .panel[data-panel="calculate"] .key.nav-arrow:active {
  transform: translateY(1px) !important;
  box-shadow: 0 1px 0 #0b0e13, 0 2px 4px rgba(0, 0, 0, 0.25) !important;
}

.calculator-root .panel[data-panel="calculate"] .key.nav-mini {
  min-height: 20px !important;
  min-width: 22px !important;
  padding: 0 5px !important;
  border-radius: 6px !important;
  font-size: 10px !important;
}

/* Desktop/tablet tuning: smaller LCD chips, bigger input/output display */
@media (min-width: 761px) {
  .calculator-root .panel[data-panel="calculate"] .chip {
    min-height: 14px !important;
    min-width: 20px !important;
    padding: 0 4px !important;
    font-size: 9px !important;
    border-radius: 5px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd {
    padding: 6px 8px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-expression {
    min-height: 24px !important;
    font-size: 16px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-result {
    min-height: 32px !important;
    font-size: 26px !important;
  }
}

/* Final LCD upscale for easier placeholder editing */
@media (min-width: 761px) {
  .calculator-root .panel[data-panel="calculate"] .lcd {
    padding: 8px 10px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-expression {
    min-height: 30px !important;
    font-size: 19px !important;
    line-height: 1.2 !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-result {
    min-height: 40px !important;
    font-size: 31px !important;
    line-height: 1.15 !important;
  }
}

@media (max-width: 760px) {
  .calculator-root .panel[data-panel="calculate"] .lcd {
    padding: 6px 8px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-expression {
    min-height: 22px !important;
    font-size: 16px !important;
    line-height: 1.2 !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-result {
    min-height: 30px !important;
    font-size: 24px !important;
    line-height: 1.15 !important;
  }
}

/* Touch-friendly interactions for all device categories */
.calculator-root .panel[data-panel="calculate"] .key,
.calculator-root .panel[data-panel="calculate"] .toggle-btn,
.calculator-root .panel[data-panel="calculate"] .chip-btn {
  touch-action: manipulation !important;
  -webkit-tap-highlight-color: transparent !important;
}

/* Keep desktop and tablet nearly same sizing */
@media (min-width: 761px) {
  .calculator-root .panel[data-panel="calculate"] .key {
    min-height: 24px !important;
    font-size: 11px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .grid-fn .key {
    min-height: 26px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .grid-num .key {
    min-height: 24px !important;
  }
}

/* Mobile-only: larger display and touch arrows */
@media (max-width: 760px) {
  .calculator-root .panel[data-panel="calculate"] .lcd {
    padding: 8px 10px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-expression {
    min-height: 28px !important;
    font-size: 18px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-result {
    min-height: 44px !important;
    font-size: 28px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .key.nav-mini {
    min-height: 24px !important;
    min-width: 26px !important;
    font-size: 11px !important;
  }
}
}

/* ------------------------------------- */
/* Calculate Mode: ClassWiz-style LCD UI */
/* ------------------------------------- */
.calculator-root .panel[data-panel="calculate"] .lcd {
  padding: 6px 8px !important;
  min-height: 162px;
  overflow: visible;
  position: relative;
}

.calculator-root .panel[data-panel="calculate"] .lcd-head {
  position: absolute;
  top: 6px;
  right: 8px;
  display: inline-flex;
  width: auto;
  align-items: flex-start !important;
  gap: 6px;
  margin: 0;
  z-index: 2;
}

.calculator-root .panel[data-panel="calculate"] .chip-wrap {
  display: inline-flex;
  align-items: center;
  gap: 4px !important;
}

.calculator-root .panel[data-panel="calculate"] .chip {
  min-height: 16px !important;
  min-width: 24px !important;
  padding: 0 4px !important;
  font-size: 0.62rem !important;
  border-radius: 5px !important;
  line-height: 1 !important;
}

.calculator-root .panel[data-panel="calculate"] .chip-btn {
  cursor: pointer;
}

.calculator-root .panel[data-panel="calculate"] .lcd-expression {
  min-height: 56px !important;
  text-align: left !important;
  direction: ltr !important;
  overflow-x: auto !important;
  overflow-y: visible !important;
  white-space: nowrap !important;
  padding: 26px 0 3px !important;
  font-size: clamp(1.18rem, 2.45vw, 1.64rem) !important;
  line-height: 1.35;
  -webkit-overflow-scrolling: touch;
}

.calculator-root .panel[data-panel="calculate"] .lcd-result {
  min-height: 54px !important;
  text-align: right !important;
  white-space: nowrap !important;
  font-size: clamp(1.58rem, 3.15vw, 2.12rem) !important;
  line-height: 1.16;
}

.calculator-root .panel[data-panel="calculate"] .pad-head .fn-head-tools {
  margin-left: auto !important;
  display: inline-flex !important;
  flex-wrap: nowrap !important;
  align-items: center !important;
  gap: 4px !important;
}

.calculator-root .panel[data-panel="calculate"] .pad-head .cursor-nav {
  display: inline-grid !important;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 2px !important;
  align-items: center;
  justify-content: center;
}

.calculator-root .panel[data-panel="calculate"] .key.nav-mini {
  min-height: 23px !important;
  min-width: 24px !important;
  padding: 0 !important;
  font-size: 0.68rem !important;
  border-radius: 6px !important;
  line-height: 1 !important;
}

.calculator-root .panel[data-panel="calculate"] .angle-toggle {
  gap: 2px !important;
  padding: 1px !important;
  border-radius: 7px !important;
}

.calculator-root .panel[data-panel="calculate"] .toggle-btn {
  min-width: 29px !important;
  min-height: 21px !important;
  padding: 1px 5px !important;
  font-size: 0.64rem !important;
  border-radius: 6px !important;
  line-height: 1 !important;
}

/* Older renderer block removed.
   Canonical expression renderer rules live near the end of this file. */

@keyframes calcCaretBlink {
  0%,
  49% {
    opacity: 1;
  }
  50%,
  100% {
    opacity: 0;
  }
}

/* Desktop + tablet: very compact chips/toggles/arrows */
@media (min-width: 761px) {
  .calculator-root .panel[data-panel="calculate"] .chip {
    min-height: 15px !important;
    min-width: 22px !important;
    padding: 0 4px !important;
    font-size: 0.6rem !important;
  }

  .calculator-root .panel[data-panel="calculate"] .toggle-btn {
    min-width: 27px !important;
    min-height: 20px !important;
    padding: 1px 5px !important;
    font-size: 0.62rem !important;
  }

  .calculator-root .panel[data-panel="calculate"] .key.nav-mini {
    min-width: 23px !important;
    min-height: 22px !important;
    font-size: 0.65rem !important;
  }
}

/* Mobile: keep readability and touch comfort */
@media (max-width: 760px) {
  .calculator-root .panel[data-panel="calculate"] .lcd {
    min-height: 166px;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-expression {
    min-height: 60px !important;
    font-size: 1.26rem !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-result {
    min-height: 56px !important;
    font-size: 1.78rem !important;
  }

  .calculator-root .panel[data-panel="calculate"] .chip {
    min-height: 16px !important;
    min-width: 23px !important;
    font-size: 0.62rem !important;
  }

  .calculator-root .panel[data-panel="calculate"] .pad-head .fn-head-tools {
    gap: 3px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .key.nav-mini {
    min-height: 23px !important;
    min-width: 24px !important;
    font-size: 0.67rem !important;
  }
}

/* --------------------------------------------- */
/* RyanCV Theme Collision Guard (final override) */
/* --------------------------------------------- */
.calculator-root,
.calculator-root * {
  box-sizing: border-box !important;
}

.calculator-root {
  font-size: 16px !important;
  line-height: 1.2 !important;
  text-size-adjust: 100% !important;
  -webkit-text-size-adjust: 100% !important;
  isolation: isolate;
}

.calculator-root button,
.calculator-root input,
.calculator-root select,
.calculator-root textarea {
  font-family: Georgia, "Times New Roman", serif !important;
  line-height: 1.2 !important;
  text-transform: none !important;
  letter-spacing: normal !important;
}

.calculator-root .app-shell {
  width: 100% !important;
  max-width: 860px !important;
}

.calculator-root .mode-nav {
  gap: 3px !important;
  padding: 5px 6px !important;
}

.calculator-root .mode-btn {
  min-height: 28px !important;
  padding: 3px 6px !important;
  font-size: 11px !important;
}

.calculator-root .mode-icon {
  font-size: 10px !important;
}

.calculator-root .format-control {
  font-size: 10px !important;
}

.calculator-root .format-select {
  min-height: 22px !important;
  font-size: 11px !important;
}

.calculator-root .panel[data-panel="calculate"] .chip {
  min-height: 16px !important;
  min-width: 24px !important;
  padding: 0 4px !important;
  font-size: 10px !important;
}

.calculator-root .panel[data-panel="calculate"] .toggle-btn {
  min-width: 28px !important;
  min-height: 20px !important;
  padding: 1px 5px !important;
  font-size: 10px !important;
}

.calculator-root .panel[data-panel="calculate"] .key.nav-mini {
  min-width: 23px !important;
  min-height: 22px !important;
  font-size: 10px !important;
}

.calculator-root .panel[data-panel="calculate"] .grid-fn .key {
  min-height: 30px !important;
  font-size: 13px !important;
}

.calculator-root .panel[data-panel="calculate"] .grid-num .key {
  min-height: 30px !important;
  font-size: 13px !important;
}

.calculator-root .panel {
  padding: 6px !important;
}

.calculator-root .card {
  padding: 9px !important;
}

.calculator-root .btn {
  min-height: 28px !important;
  padding: 3px 10px !important;
  font-size: 12px !important;
}

.calculator-root input,
.calculator-root select,
.calculator-root textarea {
  font-size: 13px !important;
}

@media (max-width: 1040px) {
  .calculator-root .app-shell {
    max-width: 100% !important;
  }

  .calculator-root .mode-btn {
    min-height: 25px !important;
    font-size: 10px !important;
    padding: 2px 5px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .grid-fn .key,
  .calculator-root .panel[data-panel="calculate"] .grid-num .key {
    min-height: 27px !important;
    font-size: 12px !important;
  }

  .calculator-root .panel {
    padding: 5px !important;
  }

  .calculator-root .card {
    padding: 8px !important;
  }

  .calculator-root .btn {
    min-height: 26px !important;
    font-size: 11px !important;
  }

  .calculator-root input,
  .calculator-root select,
  .calculator-root textarea {
    font-size: 12px !important;
  }
}

@media (max-width: 760px) {
  .calculator-root .mode-nav-wrap {
    margin: 0 4px 4px !important;
  }

  .calculator-root .mobile-nav-toggle {
    min-height: 36px !important;
    padding: 6px 10px !important;
    font-size: 11px !important;
    border-radius: 10px !important;
  }

  .calculator-root .mode-nav {
    gap: 2px !important;
    padding: 5px !important;
  }

  .calculator-root .mode-btn {
    min-height: 22px !important;
    font-size: 8px !important;
    padding: 1px 4px !important;
  }

  .calculator-root .mode-icon {
    font-size: 8px !important;
  }

  .calculator-root .format-control {
    font-size: 8px !important;
  }

  .calculator-root .format-select {
    min-height: 19px !important;
    font-size: 9px !important;
    padding: 1px 16px 1px 5px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd {
    min-height: 142px !important;
    padding: 4px 6px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-expression {
    min-height: 46px !important;
    font-size: 1rem !important;
    line-height: 1.28 !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-result {
    min-height: 42px !important;
    font-size: 1.35rem !important;
    line-height: 1.14 !important;
  }

  .calculator-root .panel[data-panel="calculate"] .chip {
    min-height: 14px !important;
    min-width: 20px !important;
    padding: 0 3px !important;
    font-size: 8px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .toggle-btn {
    min-width: 24px !important;
    min-height: 16px !important;
    padding: 0 4px !important;
    font-size: 8px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .key.nav-mini {
    min-width: 20px !important;
    min-height: 18px !important;
    font-size: 8px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .grid-fn .key {
    min-height: 24px !important;
    font-size: 10px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .grid-num .key {
    min-height: 24px !important;
    font-size: 10px !important;
  }

  .calculator-root .panel {
    padding: 4px !important;
  }

  .calculator-root .card {
    padding: 7px !important;
  }

  .calculator-root .btn {
    min-height: 24px !important;
    padding: 2px 8px !important;
    font-size: 10px !important;
  }

  .calculator-root input,
  .calculator-root select,
  .calculator-root textarea {
    font-size: 11px !important;
  }
}

/* ----------------------------------------------------- */
/* Auto normalize against WordPress/Theme size inflation */
/* ----------------------------------------------------- */
.calculator-root {
  --theme-scale: 1;
  zoom: var(--theme-scale);
}

@supports not (zoom: 1) {
  .calculator-root {
    transform: scale(var(--theme-scale));
    transform-origin: top left;
    width: calc(100% / var(--theme-scale));
  }
}

/* ---------------------------------------------------------- */
/* Final render parity sizing (wins over old compact overrides) */
/* ---------------------------------------------------------- */
@media (min-width: 1041px) {
  .calculator-root .app-shell {
    max-width: 980px !important;
  }

  .calculator-root .mode-btn {
    min-height: 34px !important;
    padding: 5px 9px !important;
    font-size: 13px !important;
  }

  .calculator-root .format-control {
    font-size: 12px !important;
  }

  .calculator-root .format-select {
    min-height: 34px !important;
    font-size: 14px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd {
    min-height: 154px !important;
    padding: 7px 10px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .chip {
    min-height: 20px !important;
    min-width: 30px !important;
    padding: 1px 6px !important;
    font-size: 11px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .toggle-btn {
    min-width: 34px !important;
    min-height: 26px !important;
    padding: 3px 7px !important;
    font-size: 12px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .key.nav-mini {
    min-width: 28px !important;
    min-height: 26px !important;
    font-size: 12px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .grid-fn .key,
  .calculator-root .panel[data-panel="calculate"] .grid-num .key {
    min-height: 40px !important;
    font-size: 15px !important;
  }
}

@media (min-width: 761px) and (max-width: 1040px) {
  .calculator-root .mode-btn {
    min-height: 32px !important;
    padding: 5px 8px !important;
    font-size: 12px !important;
  }

  .calculator-root .format-select {
    min-height: 30px !important;
    font-size: 13px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd {
    min-height: 148px !important;
    padding: 6px 9px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .chip {
    min-height: 18px !important;
    min-width: 28px !important;
    padding: 1px 5px !important;
    font-size: 10px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .toggle-btn {
    min-width: 31px !important;
    min-height: 24px !important;
    font-size: 11px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .grid-fn .key,
  .calculator-root .panel[data-panel="calculate"] .grid-num .key {
    min-height: 36px !important;
    font-size: 14px !important;
  }
}

@media (max-width: 760px) {
  .calculator-root .mode-btn {
    min-height: 26px !important;
    font-size: 10px !important;
    padding: 3px 6px !important;
  }

  .calculator-root .format-select {
    min-height: 26px !important;
    font-size: 11px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd {
    min-height: 136px !important;
    padding: 5px 7px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-expression {
    min-height: 40px !important;
    font-size: 1.05rem !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd-result {
    min-height: 38px !important;
    font-size: 1.35rem !important;
  }

  .calculator-root .panel[data-panel="calculate"] .grid-fn .key,
  .calculator-root .panel[data-panel="calculate"] .grid-num .key {
    min-height: 34px !important;
    font-size: 13px !important;
  }
}

/* ---------------------------------------------------------- */
/* Final mobile compact lock (phone only)                      */
/* ---------------------------------------------------------- */
@media (max-width: 760px) {
  .calculator-root .app-header {
    padding: 5px 7px !important;
  }

  .calculator-root .app-header .site-title {
    font-size: 1.16rem !important;
    line-height: 0.98 !important;
    letter-spacing: 0 !important;
  }

  .calculator-root .mode-nav-wrap {
    margin: 0 4px 4px !important;
  }

  .calculator-root .mobile-nav-toggle {
    min-height: 31px !important;
    padding: 4px 9px !important;
    font-size: 10px !important;
    border-radius: 9px !important;
  }

  .calculator-root .format-toolbar {
    margin: 3px 6px 5px !important;
    gap: 6px !important;
  }

  .calculator-root .format-control {
    font-size: 10px !important;
    letter-spacing: 0.04em !important;
  }

  .calculator-root .format-select {
    min-height: 22px !important;
    padding: 1px 20px 1px 7px !important;
    font-size: 10px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .lcd {
    min-height: 122px !important;
    padding: 4px 6px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .chip-wrap {
    gap: 4px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .chip,
  .calculator-root .panel[data-panel="calculate"] .chip-btn {
    min-height: 16px !important;
    min-width: 24px !important;
    padding: 0 4px !important;
    font-size: 9px !important;
    line-height: 1 !important;
    border-radius: 6px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .chip-btn {
    height: 16px !important;
    max-height: 16px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .fn-head-tools {
    gap: 4px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .cursor-nav {
    gap: 3px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .key.nav-mini {
    min-width: 21px !important;
    min-height: 21px !important;
    height: 21px !important;
    padding: 0 !important;
    font-size: 10px !important;
    line-height: 1 !important;
    border-radius: 7px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .angle-toggle {
    gap: 2px !important;
    padding: 1px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .toggle-btn {
    min-width: 25px !important;
    min-height: 21px !important;
    height: 21px !important;
    padding: 1px 5px !important;
    font-size: 10px !important;
    border-radius: 7px !important;
  }

  .calculator-root .panel[data-panel="calculate"] .grid-fn .key,
  .calculator-root .panel[data-panel="calculate"] .grid-num .key {
    min-height: 30px !important;
    font-size: 12px !important;
  }
}

/* ------------------------------------------------------------------- */
/* Canonical Math Renderer Rules (single authoritative display ruleset) */
/* ------------------------------------------------------------------- */
.calculator-root .panel[data-panel="calculate"] .lcd-expression {
  text-align: left !important;
  direction: ltr !important;
  white-space: nowrap !important;
  overflow-x: auto !important;
  overflow-y: visible !important;
  padding-top: 30px !important;
  line-height: 1.4 !important;
  -webkit-overflow-scrolling: touch;
  font-family: "Cambria Math", "STIX Two Math", "Times New Roman", Georgia, serif !important;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression,
.calculator-root .panel[data-panel="calculate"] #calcExpression * {
  overflow: visible;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-token {
  display: inline-flex;
  align-items: baseline;
  min-height: 1em;
  line-height: 1.2;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-group,
.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-group-inner {
  display: inline-flex;
  align-items: baseline;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-caret {
  display: inline-block;
  width: 1.6px;
  height: 1.12em;
  margin: 0 1px;
  background: #1f6a35;
  vertical-align: text-bottom;
  animation: calcCaretBlink 1s steps(1) infinite;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-placeholder {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 0.66em;
  min-height: 0.96em;
  padding: 0 0.08em;
  margin: 0 0.02em;
  border: 1px dashed #2d5f83;
  border-radius: 3px;
  color: #335f86;
  background: rgba(51, 95, 134, 0.08);
  line-height: 1;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-power {
  display: inline-flex;
  align-items: baseline;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-sup {
  display: inline-flex;
  font-size: 0.62em;
  line-height: 1;
  position: relative;
  top: -0.6em;
  margin-left: 0.04em;
  margin-right: 0.02em;
  transform: none;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-sub {
  display: inline-flex;
  font-size: 0.66em;
  line-height: 1;
  position: relative;
  top: 0.24em;
  margin-left: 0.04em;
  margin-right: 0.02em;
  transform: none;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-logb {
  display: inline-flex;
  align-items: baseline;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root {
  display: inline-flex;
  align-items: flex-start;
  vertical-align: baseline;
  line-height: 1;
  margin: 0 0.04em;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root-n,
.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root-cbrt {
  position: relative;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root .root-symbol {
  font-family: "Cambria Math", "STIX Two Math", "Times New Roman", Georgia, serif;
  font-size: 1.12em;
  line-height: 0.95;
  margin-right: -0.14em;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root .root-symbol.root-symbol-glyph {
  position: relative;
  display: inline-block;
  width: 0.66em;
  min-width: 0.66em;
  height: 1em;
  text-indent: -9999px;
  overflow: hidden;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root .root-symbol.root-symbol-glyph::before {
  content: "";
  position: absolute;
  left: 0.04em;
  bottom: 0.03em;
  width: 0.24em;
  height: 0.48em;
  border-left: 1.55px solid currentColor;
  border-bottom: 1.55px solid currentColor;
  transform: skewX(-12deg) rotate(-26deg);
  transform-origin: bottom left;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root .root-symbol.root-symbol-glyph::after {
  content: "";
  position: absolute;
  left: 0.17em;
  top: 0.11em;
  width: 0.5em;
  height: 1.55px;
  background: currentColor;
  transform: skewX(-10deg);
  transform-origin: left center;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root .root-radicand {
  display: inline-flex;
  align-items: baseline;
  border-top: 1.55px solid currentColor;
  margin-left: -0.24em;
  padding: 0.08em 0.16em 0 0.24em;
  transform: translateY(0.02em);
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root-n .root-index,
.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root-cbrt .root-index-fixed {
  display: inline-flex;
  position: relative;
  top: -0.66em;
  left: -0.03em;
  margin-right: -0.18em;
  font-size: 0.58em;
  line-height: 1;
  z-index: 1;
  white-space: nowrap;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root-n .root-index .expr-placeholder {
  min-width: 0.5em;
  min-height: 0.8em;
  padding: 0 0.04em;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-frac {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  vertical-align: middle;
  margin: 0 0.08em;
  line-height: 1.1;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-frac .frac-num {
  padding: 0 0.14em 0.1em;
  border-bottom: 1px solid currentColor;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-frac .frac-den {
  padding: 0.1em 0.14em 0;
}

@media (max-width: 760px) {
  .calculator-root .panel[data-panel="calculate"] .lcd-expression {
    line-height: 1.36 !important;
    padding-top: 28px !important;
  }

  .calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root .root-symbol.root-symbol-glyph::before {
    border-left-width: 1.4px;
    border-bottom-width: 1.4px;
  }

  .calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root .root-symbol.root-symbol-glyph::after {
    height: 1.4px;
  }

  .calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root .root-radicand {
    border-top-width: 1.4px;
  }
}

/* ------------------------------------------------------ */
/* Android APK Mode (WebView): tighter mobile app layout  */
/* ------------------------------------------------------ */
@media (max-width: 760px) {
  body.apk-mode .calculator-root {
    width: 100% !important;
    max-width: 100% !important;
  }

  body.apk-mode .calculator-root .app-shell {
    border-radius: 12px;
  }

  body.apk-mode .calculator-root .app-header {
    padding: 6px 8px !important;
  }

  body.apk-mode .calculator-root .app-header .site-title {
    font-size: 1.32rem !important;
    line-height: 1 !important;
  }

  body.apk-mode .calculator-root .mode-nav-wrap {
    margin: 0 6px 4px !important;
  }

  body.apk-mode .calculator-root .mobile-nav-toggle {
    min-height: 34px !important;
    font-size: 11px !important;
  }

  body.apk-mode .calculator-root .format-toolbar {
    margin: 4px 7px 6px !important;
  }

  body.apk-mode .calculator-root .format-select {
    min-height: 24px !important;
    font-size: 11px !important;
  }

  body.apk-mode .calculator-root .panel[data-panel="calculate"] .lcd {
    min-height: 142px !important;
    padding: 5px 7px !important;
  }

  body.apk-mode .calculator-root .panel[data-panel="calculate"] .lcd-expression {
    min-height: 44px !important;
    font-size: 1.08rem !important;
  }

  body.apk-mode .calculator-root .panel[data-panel="calculate"] .lcd-result {
    min-height: 40px !important;
    font-size: 1.42rem !important;
  }

  body.apk-mode .calculator-root .panel[data-panel="calculate"] .pad-wrap {
    gap: 4px !important;
  }

  body.apk-mode .calculator-root .panel[data-panel="calculate"] .grid-fn .key,
  body.apk-mode .calculator-root .panel[data-panel="calculate"] .grid-num .key {
    min-height: 32px !important;
    font-size: 12px !important;
  }
}

/* ------------------------------------------------------------------ */
/* Matrix Header Hard Fix (WordPress/RyanCV collision-proof)          */
/* ------------------------------------------------------------------ */
.calculator-root .panel[data-panel="matrix"] .card-head.matrix-head,
.scicalc-app .calculator-root .panel[data-panel="matrix"] .card-head.matrix-head {
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  gap: 10px !important;
  flex-wrap: nowrap !important;
}

.calculator-root .panel[data-panel="matrix"] .card-head.matrix-head .matrix-title,
.scicalc-app .calculator-root .panel[data-panel="matrix"] .card-head.matrix-head .matrix-title {
  margin: 0 !important;
  white-space: nowrap !important;
  line-height: 1.05 !important;
  flex: 0 0 auto !important;
}

.calculator-root .panel[data-panel="matrix"] .card-head.matrix-head .matrix-size-row,
.scicalc-app .calculator-root .panel[data-panel="matrix"] .card-head.matrix-head .matrix-size-row {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: flex-end !important;
  flex-wrap: nowrap !important;
  gap: 8px !important;
  flex: 0 1 auto !important;
  min-width: 0 !important;
}

.calculator-root .panel[data-panel="matrix"] .card-head.matrix-head .matrix-size-label,
.calculator-root .panel[data-panel="matrix"] .card-head.matrix-head .matrix-size-times,
.scicalc-app .calculator-root .panel[data-panel="matrix"] .card-head.matrix-head .matrix-size-label,
.scicalc-app .calculator-root .panel[data-panel="matrix"] .card-head.matrix-head .matrix-size-times {
  white-space: nowrap !important;
  line-height: 1 !important;
  flex: 0 0 auto !important;
}

.calculator-root .panel[data-panel="matrix"] .card-head.matrix-head .matrix-size-row > select,
.scicalc-app .calculator-root .panel[data-panel="matrix"] .card-head.matrix-head .matrix-size-row > select {
  width: 84px !important;
  min-width: 84px !important;
  max-width: 84px !important;
  flex: 0 0 84px !important;
  display: inline-block !important;
}

@media (max-width: 760px) {
  .calculator-root .panel[data-panel="matrix"] .card-head.matrix-head,
  .scicalc-app .calculator-root .panel[data-panel="matrix"] .card-head.matrix-head {
    gap: 6px !important;
  }

  .calculator-root .panel[data-panel="matrix"] .card-head.matrix-head .matrix-size-row,
  .scicalc-app .calculator-root .panel[data-panel="matrix"] .card-head.matrix-head .matrix-size-row {
    gap: 5px !important;
  }

  .calculator-root .panel[data-panel="matrix"] .card-head.matrix-head .matrix-size-row > select,
  .scicalc-app .calculator-root .panel[data-panel="matrix"] .card-head.matrix-head .matrix-size-row > select {
    width: 72px !important;
    min-width: 72px !important;
    max-width: 72px !important;
    flex-basis: 72px !important;
  }
}

/* ---------------------------------------------------------------- */
/* Root Renderer Fallback (glyph-first): clearer and larger rendering */
/* ---------------------------------------------------------------- */
.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root {
  align-items: flex-start;
  gap: 0;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root .root-symbol.root-symbol-glyph {
  display: inline-flex !important;
  align-items: flex-start;
  width: auto !important;
  min-width: 0 !important;
  height: auto !important;
  text-indent: 0 !important;
  overflow: visible !important;
  font-size: 1.32em !important;
  line-height: 0.86 !important;
  margin-right: -0.02em !important;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root .root-symbol.root-symbol-glyph::before,
.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root .root-symbol.root-symbol-glyph::after {
  content: none !important;
  display: none !important;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root .root-radicand {
  border-top: 1.8px solid currentColor !important;
  margin-left: 0.02em !important;
  padding: 0.12em 0.2em 0 0.14em !important;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root-n .root-index,
.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root-cbrt .root-index-fixed {
  top: -0.7em !important;
  left: -0.05em !important;
  margin-right: -0.06em !important;
  font-size: 0.6em !important;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-placeholder {
  min-width: 0.78em !important;
  min-height: 1.04em !important;
  padding: 0 0.1em !important;
}

.calculator-root .panel[data-panel="calculate"] #calcExpression .expr-root .root-radicand .expr-placeholder {
  min-width: 0.8em !important;
}