:root {
  color-scheme: light;
  --bg: #f7fbfa;
  --surface: #ffffff;
  --surface-soft: #edf6f3;
  --ink: #10201c;
  --muted: #61716c;
  --line: #d9e6e1;
  --teal: #057c70;
  --teal-dark: #075b54;
  --amber: #d9941e;
  --red: #b64a42;
  --shadow: 0 22px 62px rgba(28, 50, 44, 0.12);
  --radius: 8px;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f1715;
  --surface: #16221f;
  --surface-soft: #20312d;
  --ink: #edf7f4;
  --muted: #a5b7b1;
  --line: #31433e;
  --teal: #19a896;
  --teal-dark: #7de0d2;
  --amber: #f1b84b;
  --red: #ff8d82;
  --shadow: 0 22px 62px rgba(0, 0, 0, 0.3);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface) 72%, transparent), transparent 380px),
    radial-gradient(circle at 84% 10%, color-mix(in srgb, var(--teal) 17%, transparent), transparent 340px),
    radial-gradient(circle at 68px 80px, color-mix(in srgb, var(--amber) 13%, transparent), transparent 190px),
    var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  min-height: 100vh;
  padding: 22px;
}

.topbar,
.workspace {
  max-width: 1440px;
  margin: 0 auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 10px 0 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
  color: inherit;
  text-decoration: none;
}

.brand img {
  width: 50px;
  height: 50px;
  flex: 0 0 auto;
  filter: drop-shadow(0 8px 12px rgba(32, 53, 47, 0.16));
}

.brand strong,
.brand span {
  display: block;
}

.brand strong {
  font-size: 28px;
  line-height: 1.05;
}

.brand span span {
  margin-top: 5px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 680;
}

.top-actions,
.site-nav,
.tool-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.site-nav,
.tool-actions {
  justify-content: flex-end;
}

.tool-actions {
  max-width: 1440px;
  margin: -8px auto 20px;
}

.site-nav > a,
.tools-menu summary {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--ink);
  padding: 0 12px;
  font-size: 13px;
  font-weight: 780;
  text-decoration: none;
  cursor: pointer;
}

.site-nav > a:hover,
.tools-menu[open] summary,
.tools-menu summary:hover {
  background: var(--surface-soft);
}

.tools-menu {
  position: relative;
}

.tools-menu summary {
  list-style: none;
  gap: 6px;
}

.tools-menu summary::-webkit-details-marker {
  display: none;
}

.tools-menu summary::after {
  content: "";
  width: 7px;
  height: 7px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
}

.tools-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 30;
  display: grid;
  gap: 6px;
  width: min(330px, calc(100vw - 32px));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 8px;
}

.tools-panel a {
  display: grid;
  gap: 3px;
  border-radius: var(--radius);
  color: inherit;
  padding: 10px;
  text-decoration: none;
}

.tools-panel a:hover,
.tools-panel a[aria-current="page"] {
  background: var(--surface-soft);
}

.tools-panel strong,
.tools-panel span {
  display: block;
}

.tools-panel strong {
  font-size: 13px;
}

.tools-panel span {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  padding: 0 12px;
  font-size: 13px;
  font-weight: 780;
  text-decoration: none;
}

svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: 0 0 auto;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(280px, 350px) minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.mode-panel,
.calculator-card,
.panel {
  border: 1px solid color-mix(in srgb, var(--line) 84%, transparent);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.mode-panel {
  position: sticky;
  top: 18px;
  padding: 18px;
}

.panel-heading {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
}

.panel-heading.inline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  max-width: 320px;
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.02;
}

h2 {
  font-size: 16px;
}

.panel-heading p,
.panel-heading span,
.calculator-heading p,
.result-strip span,
.input-field span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.mode-list {
  display: grid;
  gap: 14px;
}

.mode-group {
  display: grid;
  gap: 8px;
}

.mode-group:first-child {
  border-bottom: 1px solid var(--line);
  padding-bottom: 14px;
}

.mode-group h2 {
  color: var(--muted);
  font-size: 11px;
  font-weight: 860;
  letter-spacing: 0;
  text-transform: uppercase;
}

.mode-group:first-child h2 {
  color: var(--teal-dark);
}

.mode-group-list {
  display: grid;
  gap: 8px;
}

.mode-button {
  display: grid;
  grid-template-columns: 36px 1fr;
  align-items: center;
  gap: 10px;
  min-height: 54px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 88%, var(--surface-soft));
  color: var(--ink);
  padding: 9px 10px;
  text-align: left;
}

.mode-group:not(:first-child) .mode-button {
  min-height: 48px;
  background: transparent;
  box-shadow: none;
}

.mode-group:not(:first-child) .mode-icon {
  width: 32px;
  height: 32px;
  min-width: 32px;
}

.mode-group:not(:first-child) .mode-icon svg {
  width: 20px;
  height: 20px;
}

.mode-icon {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: 6px;
  background: color-mix(in srgb, var(--teal) 10%, var(--surface));
  color: var(--teal-dark);
  line-height: 1;
  overflow: hidden;
}

.mode-icon svg {
  position: absolute;
  inset: 0;
  display: block;
  width: 23px;
  height: 23px;
  stroke-width: 2;
  margin: auto;
}

.mode-button strong,
.mode-button span {
  display: block;
}

.mode-button strong {
  font-size: 13px;
}

.mode-button span {
  margin-top: 2px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 680;
}

.mode-button.active {
  border-color: var(--teal);
  background: linear-gradient(135deg, var(--teal), var(--teal-dark));
  color: #fff;
}

.mode-button.active .mode-icon {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
}

.mode-button.active span {
  color: rgba(255, 255, 255, 0.78);
}

.calculator-area {
  display: grid;
  gap: 16px;
}

.calculator-card {
  position: relative;
  overflow: hidden;
  padding: clamp(18px, 3vw, 30px);
}

.calculator-card::after {
  content: "";
  position: absolute;
  right: -64px;
  bottom: -84px;
  width: 280px;
  height: 280px;
  border: 34px solid color-mix(in srgb, var(--teal) 10%, transparent);
  border-radius: 50%;
  pointer-events: none;
}

.calculator-heading {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}

.calculator-heading h2 {
  font-size: clamp(32px, 4.4vw, 56px);
  line-height: 1;
}

.precision-control {
  display: grid;
  gap: 5px;
  min-width: 132px;
}

.precision-control span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 780;
}

.precision-control select {
  border: 1px solid color-mix(in srgb, var(--teal) 30%, var(--line));
  border-radius: 999px;
  background: color-mix(in srgb, var(--teal) 10%, var(--surface));
  color: var(--teal-dark);
  color-scheme: light dark;
  padding: 7px 10px;
  font-size: 12px;
  font-weight: 820;
  white-space: nowrap;
}

.precision-control select option {
  background: var(--surface);
  color: var(--ink);
}

:root[data-theme="dark"] .precision-control select option {
  background: var(--surface);
  color: var(--ink);
}

.precision-control.compact {
  min-width: 104px;
}

.precision-control.compact span {
  color: rgba(255, 255, 255, 0.78);
}

.precision-control.compact select {
  border-color: rgba(255, 255, 255, 0.24);
  background: color-mix(in srgb, var(--surface) 92%, var(--teal));
  color: var(--ink);
}

.precision-control.compact select option {
  background: var(--surface);
  color: var(--ink);
}

.question-preview {
  position: relative;
  z-index: 1;
  margin-bottom: 14px;
  border: 1px solid color-mix(in srgb, var(--teal) 24%, var(--line));
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--teal) 8%, var(--surface));
  color: var(--teal-dark);
  padding: 12px 14px;
  font-size: 14px;
  font-weight: 820;
  line-height: 1.4;
}

.input-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.input-grid[data-mode="invoice"] {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.input-field {
  display: grid;
  gap: 9px;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 88%, var(--surface-soft));
  padding: 15px;
}

.input-field.wide {
  grid-column: 1 / -1;
}

.input-control {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  min-height: 76px;
  border: 1px solid color-mix(in srgb, var(--line) 88%, transparent);
  border-radius: 6px;
  background: var(--surface);
  overflow: hidden;
}

.input-control b,
.input-control em {
  align-self: stretch;
  display: grid;
  place-items: center;
  min-width: 42px;
  padding: 0 10px;
  color: var(--teal-dark);
  font-size: 13px;
  font-style: normal;
  font-weight: 860;
}

.input-control b {
  border-right: 1px solid var(--line);
}

.input-control em {
  border-left: 1px solid var(--line);
}

.input-control b[aria-hidden="true"],
.input-control em[aria-hidden="true"] {
  display: none;
}

.rate-control {
  display: grid;
  grid-template-columns: minmax(180px, 0.85fr) minmax(180px, 1fr);
  gap: 10px;
  align-items: stretch;
}

.rate-control > select {
  min-height: 76px;
  border: 1px solid color-mix(in srgb, var(--line) 88%, transparent);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  padding: 0 14px;
  font-size: clamp(18px, 1.7vw, 24px);
  font-weight: 820;
}

.custom-rate.is-hidden {
  display: none;
}

input,
select,
output {
  width: 100%;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--ink);
}

input {
  min-height: 76px;
  padding: 0 12px;
  font-size: clamp(30px, 4vw, 52px);
  font-weight: 820;
  line-height: 1;
}

input[type="number"] {
  appearance: textfield;
  -moz-appearance: textfield;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  appearance: none;
  -webkit-appearance: none;
  margin: 0;
}

input:focus {
  outline: 0;
}

input:invalid {
  border-color: var(--red);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--red) 16%, transparent);
}

.stepper {
  align-self: stretch;
  display: grid;
  grid-template-rows: 1fr 1fr;
  min-width: 56px;
  border-left: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-soft) 60%, var(--surface));
}

.stepper-button {
  display: grid;
  place-items: center;
  min-width: 56px;
  min-height: 38px;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--teal-dark);
  padding: 0;
}

.stepper-button:first-child {
  border-bottom: 1px solid var(--line);
}

.stepper-button:hover {
  background: color-mix(in srgb, var(--teal) 12%, transparent);
}

.stepper-button:active {
  background: color-mix(in srgb, var(--teal) 20%, transparent);
}

.stepper-button svg {
  width: 22px;
  height: 22px;
  stroke-width: 2.8;
}

.field-hint {
  color: var(--muted);
  font-size: 12px;
  font-weight: 680;
}

.result-strip {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 7px;
  margin-top: 16px;
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 96% 0%, rgba(255, 255, 255, 0.16), transparent 36%),
    linear-gradient(135deg, var(--teal), var(--teal-dark));
  color: #fff;
  padding: 18px;
}

.result-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.result-strip span,
.result-strip p {
  color: rgba(255, 255, 255, 0.78);
}

.result-strip strong {
  font-size: clamp(38px, 6vw, 72px);
  line-height: 0.98;
  overflow-wrap: anywhere;
}

.result-strip p {
  font-size: 14px;
  font-weight: 720;
  line-height: 1.45;
}

.result-breakdown {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin: 8px 0 0;
}

.result-breakdown div {
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.1);
  padding: 10px;
}

.result-breakdown dt,
.result-breakdown dd {
  margin: 0;
}

.result-breakdown dt {
  color: rgba(255, 255, 255, 0.72);
  font-size: 11px;
  font-weight: 800;
}

.result-breakdown dd {
  margin-top: 4px;
  color: #ffffff;
  font-size: 15px;
  font-weight: 850;
  overflow-wrap: anywhere;
}

.copy-options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.result-button {
  min-height: 34px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  padding: 0 10px;
  font-size: 12px;
  font-weight: 820;
}

.primary-copy {
  background: #ffffff;
  color: var(--teal-dark);
}

.quiet-copy {
  min-width: 54px;
  color: rgba(255, 255, 255, 0.82);
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.panel {
  padding: 16px;
  box-shadow: none;
}

.steps-list {
  display: grid;
  gap: 9px;
  margin: 0;
  padding-left: 22px;
}

.steps-list li {
  padding-left: 4px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

.steps-list strong {
  color: var(--ink);
}

.quick-grid,
.recent-list,
.glossary-list {
  display: grid;
  gap: 8px;
}

.quick-example,
.quick-button,
.recent-row,
.recent-item,
.glossary-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 88%, var(--surface-soft));
  color: var(--ink);
  padding: 12px;
  text-align: left;
}

.quick-example strong,
.quick-example span,
.quick-button strong,
.quick-button span,
.recent-row strong,
.recent-row span,
.recent-item strong,
.recent-item span,
.glossary-item strong,
.glossary-item span {
  display: block;
}

.quick-example strong,
.quick-button strong,
.recent-row strong,
.recent-item strong,
.glossary-item strong {
  font-size: 13px;
}

.quick-example span,
.quick-button span,
.recent-row span,
.recent-item span,
.glossary-item span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.quick-button {
  width: 100%;
  cursor: pointer;
}

.quick-button:hover {
  border-color: var(--teal);
}

.glossary-panel {
  grid-column: 1 / -1;
}

.recent-row,
.recent-item {
  display: grid;
  gap: 9px;
}

.recent-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.text-button {
  min-height: 30px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--teal-dark);
  padding: 0 9px;
  font-size: 12px;
  font-weight: 800;
}

.empty-state {
  color: var(--muted);
  font-size: 13px;
}

.about-panel {
  background:
    radial-gradient(circle at 100% 0%, color-mix(in srgb, var(--amber) 14%, transparent), transparent 42%),
    color-mix(in srgb, var(--surface) 90%, var(--surface-soft));
}

.about-panel p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.rate-guide-panel {
  background: color-mix(in srgb, var(--surface) 92%, var(--surface-soft));
}

.rate-guide-list {
  display: grid;
  gap: 8px;
}

.rate-guide-list div {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 12px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 10px;
}

.rate-guide-list strong {
  color: var(--teal-dark);
  font-size: 15px;
}

.rate-guide-list span,
.source-note {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.source-note {
  margin-top: 10px;
}

.source-note a {
  color: var(--teal-dark);
  font-weight: 800;
}

.about-note {
  margin-top: 14px;
  border-left: 4px solid var(--amber);
  padding: 10px 12px;
  border-radius: 0 var(--radius) var(--radius) 0;
  background: color-mix(in srgb, var(--amber) 12%, var(--surface));
  color: var(--ink);
  font-size: 13px;
  font-weight: 720;
  line-height: 1.45;
}

@media (max-width: 980px) {
  .workspace,
  .support-grid {
    grid-template-columns: 1fr;
  }

  .input-grid[data-mode="invoice"] {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .mode-panel {
    position: static;
  }

  .mode-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }
}

@media (max-width: 680px) {
  .app-shell {
    padding: 16px;
  }

  .topbar {
    align-items: flex-start;
  }

  .site-nav,
  .tool-actions {
    justify-content: flex-start;
  }

  .brand span span {
    display: none;
  }

  .icon-button {
    width: 42px;
    padding: 0;
    font-size: 0;
  }

  .mode-list,
  .input-grid,
  .rate-control {
    grid-template-columns: 1fr;
  }

  .input-grid[data-mode="invoice"] {
    grid-template-columns: 1fr;
  }

  .calculator-heading {
    display: grid;
  }

  .result-head {
    display: grid;
  }

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

  .result-strip {
    position: sticky;
    bottom: 10px;
    z-index: 2;
  }
}

/* Compact density pass: keep the answer and primary fields higher in the viewport. */
.app-shell { padding: 16px; }
.topbar { padding: 6px 0 12px; }
.tool-actions { margin: -4px auto 12px; }
.workspace {
  grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
  gap: 16px;
}
.mode-panel { padding: 14px; }
h1 {
  font-size: clamp(26px, 3vw, 36px);
  line-height: 1.05;
}
.mode-list,
.mode-group-list { gap: 7px; }
.mode-group:first-child { padding-bottom: 10px; }
.mode-button {
  grid-template-columns: 32px 1fr;
  min-height: 46px;
  gap: 8px;
  padding: 7px 8px;
}
.mode-group:not(:first-child) .mode-button { min-height: 42px; }
.mode-icon,
.mode-group:not(:first-child) .mode-icon {
  width: 30px;
  height: 30px;
  min-width: 30px;
}
.mode-icon svg,
.mode-group:not(:first-child) .mode-icon svg {
  width: 19px;
  height: 19px;
}
.calculator-area { gap: 12px; }
.calculator-card { padding: clamp(14px, 2.2vw, 22px); }
.calculator-heading {
  gap: 12px;
  margin-bottom: 14px;
}
.calculator-heading h2 { font-size: clamp(26px, 3.2vw, 42px); }
.question-preview {
  margin-bottom: 10px;
  padding: 9px 11px;
}
.input-grid { gap: 10px; }
.input-field {
  gap: 6px;
  padding: 10px;
}
.rate-control > select,
input {
  min-height: 54px;
  font-size: clamp(24px, 3vw, 40px);
}
.result-strip {
  gap: 9px;
  margin-top: 12px;
  padding: 14px;
}
.result-strip strong { font-size: clamp(32px, 4.4vw, 56px); }
.result-breakdown { gap: 8px; }
.result-breakdown div { padding: 8px; }

@media (max-width: 680px) {
  .workspace,
  .support-grid,
  .input-grid,
  .rate-control,
  .input-grid[data-mode="invoice"] {
    grid-template-columns: 1fr;
  }
  .mode-panel { padding: 12px; }
  .panel-heading { margin-bottom: 10px; }
  h1 { font-size: 26px; }
  .mode-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mode-button {
    grid-template-columns: 28px 1fr;
    min-height: 46px;
    padding: 8px;
  }
  .mode-button span { display: block; }
  .mode-button > span:not(.mode-icon) > span { display: none; }
  .mode-button strong {
    display: block;
    font-size: 12px;
  }
  .mode-icon,
  .mode-group:not(:first-child) .mode-icon {
    width: 28px;
    height: 28px;
    min-width: 28px;
  }
  .input-field { padding: 9px; }
  .rate-control > select,
  input {
    min-height: 48px;
    font-size: clamp(22px, 8vw, 34px);
  }
}

/* UX pass: keep fields compact and prevent select text clipping. */
.calculator-card::after {
  display: none;
}

.calculator-card {
  padding: 18px;
}

.calculator-heading {
  margin-bottom: 12px;
}

.calculator-heading h2 {
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.05;
}

.input-field {
  padding: 10px;
}

.input-control {
  min-height: 54px;
}

.input-control b,
.input-control em {
  min-width: 38px;
  padding: 0 8px;
}

input {
  min-height: 54px;
  font-size: clamp(26px, 3vw, 38px);
}

.rate-control > select {
  min-height: 54px;
  padding: 0 36px 0 10px;
  font-size: 18px;
  line-height: 1.1;
}

.stepper {
  min-width: 46px;
}

.stepper-button {
  min-width: 46px;
  min-height: 27px;
}

.stepper-button svg {
  width: 22px;
  height: 22px;
  stroke-width: 3;
}

.result-strip strong {
  font-size: clamp(34px, 4vw, 52px);
}

@media (max-width: 680px) {
  .calculator-card {
    padding: 14px;
  }

  .calculator-heading h2 {
    font-size: 28px;
  }

  .input-control,
  input,
  .rate-control > select {
    min-height: 50px;
  }

  input {
    font-size: clamp(24px, 8vw, 34px);
  }

  .rate-control > select {
    font-size: 18px;
  }
}

@media (max-width: 680px) {
  .mode-group,
  .mode-group-list {
    display: contents;
  }

  .mode-group h2 {
    display: none;
  }

  .mode-button {
    min-height: 40px;
  }
}

/* Layout rethink: task first, answer and steps in a right rail. */
.workspace {
  display: block;
}

.calculator-area {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 370px);
  gap: 14px;
  align-items: start;
}

.calculator-card {
  grid-column: 1;
  grid-row: 1;
}

.results-column {
  grid-column: 2;
  grid-row: 1 / span 2;
  display: grid;
  gap: 12px;
  min-width: 0;
}

.results-column .result-strip {
  position: static;
  margin-top: 0;
}

.results-column .result-breakdown {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.results-column .panel {
  padding: 14px;
}

.calculator-heading h1 {
  max-width: 600px;
  font-size: clamp(28px, 3.1vw, 42px);
  line-height: 1.03;
}

.calculator-heading h2 {
  margin-top: 12px;
  color: var(--teal-dark);
  font-size: clamp(22px, 2.1vw, 30px);
}

.mode-panel {
  position: static;
  grid-column: 1;
  grid-row: 2;
}

.mode-panel .panel-heading {
  grid-template-columns: minmax(0, 240px) minmax(0, 1fr);
  align-items: end;
  gap: 12px;
}

.mode-panel .panel-heading h2 {
  font-size: 18px;
}

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

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

.seo-panel {
  grid-column: 1 / -1;
}

.seo-panel h2 {
  margin: 0 0 10px;
  font-size: 22px;
}

.seo-panel h3 {
  margin: 18px 0 6px;
  font-size: 16px;
}

.seo-panel p {
  color: var(--muted);
  line-height: 1.55;
}

.seo-panel p + p {
  margin-top: 10px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  max-width: 1440px;
  margin: 18px auto 0;
  padding: 14px 0 2px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.site-footer a {
  color: var(--teal-dark);
  font-weight: 760;
  text-decoration: none;
}

.ad-slot[hidden] {
  display: none;
}

.ad-slot.is-active {
  display: grid;
  place-items: center;
  min-height: 90px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 82%, var(--surface-soft));
  color: var(--muted);
}

.ad-slot-leaderboard {
  max-width: 970px;
  margin: 0 auto 14px;
}

.ad-slot-result.is-active {
  min-height: 120px;
}

.related-tools {
  grid-column: 1 / -1;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 16px;
}

.related-tool-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.related-tool-grid a {
  display: grid;
  gap: 5px;
  min-height: 86px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 88%, var(--surface-soft));
  color: inherit;
  padding: 12px;
  text-decoration: none;
}

.related-tool-grid span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
}

.glossary-panel {
  grid-column: auto;
}

@media (max-width: 1080px) {
  .calculator-area {
    grid-template-columns: 1fr;
  }

  .calculator-card,
  .results-column,
  .mode-panel,
  .support-grid,
  .seo-panel {
    grid-column: 1;
    grid-row: auto;
  }

  .results-column {
    grid-template-columns: minmax(0, 1.1fr) minmax(260px, 0.9fr);
  }

  .results-column .result-strip {
    grid-row: 1 / span 2;
  }

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

@media (max-width: 760px) {
  .calculator-area,
  .results-column,
  .support-grid,
  .mode-panel .panel-heading {
    grid-template-columns: 1fr;
  }

  .site-footer {
    flex-direction: column;
  }

  .site-footer nav {
    justify-content: flex-start;
  }

  .related-tool-grid {
    grid-template-columns: 1fr;
  }

  .results-column .result-strip {
    grid-row: auto;
  }

  .calculator-heading h1 {
    font-size: 28px;
  }

  .mode-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    max-height: 300px;
  }

  .question-preview {
    padding: 10px;
    font-size: 13px;
  }

  .input-grid {
    gap: 10px;
  }

  .input-field {
    gap: 5px;
    padding: 8px;
  }

  .input-control,
  input,
  .rate-control > select {
    min-height: 44px;
  }

  input {
    font-size: clamp(22px, 7.5vw, 32px);
  }

  .stepper {
    min-width: 44px;
  }

  .stepper-button {
    min-width: 44px;
    min-height: 22px;
  }
}