:root {
  color-scheme: light;
  --ink: #18201e;
  --muted: #65706c;
  --line: #d7e0dc;
  --soft-line: #eaf0ed;
  --paper: #ffffff;
  --canvas: #f7f9ff;
  --green: #153f34;
  --green-2: #246b55;
  --coral: #d75849;
  --gold: #a46d17;
  --focus: #3b68fc;
  --radius: 8px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  min-width: 320px;
  background: var(--canvas);
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--canvas);
  font-size: 15px;
  line-height: 1.5;
  letter-spacing: 0;
}

button,
input,
select,
textarea {
  color: inherit;
  font: inherit;
  letter-spacing: 0;
}

button,
a,
input,
select,
textarea {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--focus) 35%, transparent);
  outline-offset: 2px;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: grid;
  grid-template-columns: minmax(140px, 1fr) minmax(260px, 620px) minmax(140px, 1fr);
  align-items: center;
  min-height: 64px;
  padding: 10px clamp(18px, 4vw, 56px);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 96%, transparent);
  box-shadow: 0 2px 14px rgb(35 58 92 / 8%);
  backdrop-filter: blur(14px);
}

.site-header-compact {
  grid-template-columns: 1fr auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  width: max-content;
  gap: 10px;
  color: var(--green);
  font-size: 20px;
  font-weight: 750;
}

.brand img {
  display: block;
}

.header-search {
  display: grid;
  grid-template-columns: 24px 1fr auto;
  align-items: center;
  min-height: 42px;
  padding: 0 11px;
  border: 1px solid #cfd8d3;
  border-radius: var(--radius);
  background: #f9fbfa;
  color: var(--muted);
}

.header-search:focus-within {
  border-color: var(--green-2);
  box-shadow: 0 0 0 3px rgb(36 107 85 / 12%);
  background: var(--paper);
}

.header-search input {
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
}

.header-search kbd {
  min-width: 23px;
  height: 23px;
  border: 1px solid var(--line);
  border-bottom-color: #c4ccc8;
  border-radius: 4px;
  background: var(--paper);
  color: #7a8580;
  font: 12px/21px ui-monospace, SFMono-Regular, Consolas, monospace;
  text-align: center;
}

.header-nav {
  display: flex;
  justify-self: end;
  align-items: center;
  gap: 16px;
  color: #46514d;
}

.header-nav a:hover {
  color: var(--green-2);
}


.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--paper) 88%, #e7f0ec);
}

.language-button {
  min-width: 54px;
  height: 28px;
  padding: 0 10px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.language-button.is-active,
.language-button[aria-pressed="true"] {
  background: var(--green);
  color: white;
}

.language-button:hover {
  color: var(--green);
}

.language-button.is-active:hover,
.language-button[aria-pressed="true"]:hover {
  color: white;
}

@media (max-width: 720px) {
  .header-nav {
    display: flex !important;
    gap: 8px;
  }

  .header-nav > a {
    display: none;
  }

  .language-switch {
    margin-left: auto;
  }
}

.icon-button,
.favorite-button {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  color: #69736f;
  font-size: 20px;
}

.icon-button:hover,
.favorite-button:hover,
.favorite-button.is-saved {
  border-color: #d3a343;
  color: #a46d17;
}

.app-shell {
  display: grid;
  grid-template-columns: 236px minmax(0, 920px);
  justify-content: center;
  align-items: start;
  gap: clamp(24px, 3vw, 40px);
  width: min(100%, 1300px);
  margin: 0 auto;
  padding: 34px clamp(18px, 4vw, 56px) 80px;
}

.category-sidebar {
  position: sticky;
  top: 92px;
}

.sidebar-heading,
.catalog-toolbar,
.calculator-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sidebar-heading {
  min-height: 34px;
  margin-bottom: 10px;
}

.text-button {
  padding: 4px 0;
  border: 0;
  background: transparent;
  color: var(--muted);
}

.text-button.is-active {
  color: var(--green-2);
  font-weight: 700;
}

.category-list {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.category-filter {
  display: grid;
  grid-template-columns: 30px 1fr auto;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 42px;
  padding: 5px 8px;
  border: 0;
  border-radius: var(--radius);
  background: transparent;
  text-align: left;
}

.category-filter:hover,
.category-filter.is-active {
  background: var(--paper);
}

.category-filter.is-active {
  box-shadow: inset 3px 0 var(--green-2);
}

.category-filter small {
  color: #8a948f;
  font-size: 12px;
}

.category-mark {
  display: inline-grid;
  flex: 0 0 auto;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background: #e5eee9;
  color: #285646;
  font-size: 10px;
  font-weight: 800;
}

.category-biology,
.category-ecology { background: #dff0e5; color: #266440; }
.category-chemistry,
.category-physics { background: #e6edf7; color: #315d91; }
.category-construction { background: #f5e8d4; color: #80591d; }
.category-conversion,
.category-math { background: #e8e6f5; color: #5b4c8a; }
.category-everyday-life,
.category-food { background: #f8e6df; color: #9a4d39; }
.category-finance,
.category-statistics { background: #e0eeee; color: #25616a; }
.category-health,
.category-sports { background: #f4e1e5; color: #8e4154; }
.category-other { background: #e9eceb; color: #58605d; }

.catalog-panel,
.category-page,
.tool-page {
  min-width: 0;
}

.catalog-toolbar {
  min-height: 76px;
  margin-bottom: 18px;
}

.eyebrow {
  margin: 0 0 2px;
  color: var(--green-2);
  font: 700 11px/1.3 ui-monospace, SFMono-Regular, Consolas, monospace;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: 28px;
  line-height: 1.25;
  letter-spacing: 0;
}

.catalog-count {
  display: flex;
  align-items: baseline;
  gap: 6px;
  color: var(--muted);
}

.catalog-count strong {
  color: var(--ink);
  font-size: 20px;
}

.filter-row {
  display: inline-flex;
  gap: 0;
  margin-bottom: 14px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #edf2ef;
}

.segment {
  min-height: 32px;
  padding: 5px 12px;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
}

.segment.is-active {
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 1px 2px rgb(20 44 35 / 10%);
}

.tool-list {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.tool-row {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 52px;
  min-height: 62px;
  border-bottom: 1px solid var(--soft-line);
}

.tool-row:last-child {
  border-bottom: 0;
}

.tool-row:hover {
  background: #f8faf9;
}

.tool-row-main {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) 20px;
  align-items: center;
  gap: 12px;
  min-width: 0;
  padding: 10px 8px 10px 14px;
}

.tool-copy {
  display: grid;
  min-width: 0;
}

.tool-copy strong {
  overflow: hidden;
  color: #26312d;
  font-size: 14px;
  font-weight: 650;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tool-copy span {
  color: #87918d;
  font-size: 12px;
}

.status {
  width: max-content;
  padding: 2px 7px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #f3f6f4;
  color: #6f7975;
  font-size: 11px;
  line-height: 20px;
}

.status-native { border-color: #b9d8ca; background: #eaf5ef; color: #276149; }
.status-plugin { border-color: #e3ceb0; background: #fbf3e6; color: #81591d; }
.status-review { border-color: #c8d7e9; background: #eff5fb; color: #3f6286; }

.row-arrow {
  color: #9ba49f;
  font-size: 24px;
}

.favorite-button {
  align-self: center;
  justify-self: center;
  border-color: transparent;
  background: transparent;
}

.load-more {
  width: 100%;
  min-height: 42px;
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  color: #46514d;
}

.load-more:hover {
  border-color: #b6c4bd;
}

.empty-state,
.loading-state,
.error-state {
  padding: 44px 20px;
  color: var(--muted);
  text-align: center;
}

.category-page,
.tool-page {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
  padding: 26px 0 80px;
}

.breadcrumbs {
  display: flex;
  overflow: hidden;
  align-items: center;
  gap: 8px;
  margin-bottom: 26px;
  color: #76817c;
  font-size: 13px;
  white-space: nowrap;
}

.breadcrumbs a:hover {
  color: var(--green-2);
}

.breadcrumbs span:last-child {
  overflow: hidden;
  text-overflow: ellipsis;
}

.section-heading,
.tool-heading {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 28px;
}

.section-heading > .category-mark,
.tool-heading > .category-mark {
  width: 44px;
  height: 44px;
  font-size: 12px;
}

.section-heading p,
.tool-heading p {
  margin-bottom: 0;
  color: var(--muted);
}

.section-heading h1,
.tool-heading h1 {
  margin-bottom: 5px;
  overflow-wrap: anywhere;
}

.category-tool-list {
  max-width: 900px;
}

.tool-layout {
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(190px, 240px);
  justify-content: space-between;
  align-items: start;
  gap: 32px;
}

.tool-layout > * {
  min-width: 0;
}

.calculator-frame {
  container-type: inline-size;
  overflow: hidden;
  border: 1px solid #cfd9d4;
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: 0 10px 28px rgb(35 58 92 / 8%);
}

.calculator-topbar {
  min-height: 50px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  background: #f8faf9;
}

.calculator-root {
  min-height: 240px;
  padding: 20px;
  background: var(--paper);
}

.calculator-root.is-unavailable {
  display: grid;
  place-items: center;
}

.field-group {
  display: block;
  min-width: 0;
  margin: 0 0 22px;
  padding: 0 0 22px;
  border: 0;
  border-bottom: 1px solid var(--soft-line);
}

.field-group:last-of-type {
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 0;
}

.field-group h2,
.field-group summary {
  margin-bottom: 14px;
  padding: 0;
  font-size: 14px;
  font-weight: 750;
}

.field-group h2 {
  margin-top: 0;
}

.field-group summary {
  width: fit-content;
  cursor: pointer;
  color: #27332e;
}

.field-group summary::marker {
  color: var(--green-2);
}

.field-group-body,
.field-matrix-column {
  display: grid;
  gap: 13px;
  min-width: 0;
}

details.field-group:not([open]) > .field-group-body {
  display: none;
}

.field-group-description {
  margin: -3px 0 14px;
  color: var(--muted);
  font-size: 13px;
}

.field-matrix {
  display: grid;
  grid-template-columns: 1fr;
  gap: 13px;
  min-width: 0;
  margin-bottom: 13px;
}

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

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

.field-matrix-columns-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

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

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

.field-matrix:not(.field-matrix-columns-1) .field-row {
  grid-template-columns: 1fr;
  gap: 6px;
}

.field-matrix:not(.field-matrix-columns-1) .field-row.is-checkbox .field-input-stack {
  grid-column: auto;
}

.field-matrix:last-child {
  margin-bottom: 0;
}

.field-matrix-column {
  display: grid;
  gap: 13px;
  min-width: 0;
}

.field-row {
  display: grid;
  grid-template-columns: minmax(120px, 0.75fr) minmax(210px, 1.25fr);
  align-items: center;
  gap: 14px;
}

.field-row.is-output {
  margin: 2px -8px;
  padding: 8px;
  border: 1px solid #cfe5db;
  border-radius: var(--radius);
  background: #eff9f4;
}

.field-row.is-output .field-label {
  color: #245b48;
  font-weight: 700;
}

.field-row.is-output .field-output-control {
  border-color: #b9d8ca;
  background: #f9fffb;
}

.field-row.is-derived:not(.is-output) .field-label {
  color: var(--green-2);
}

.field-row.is-derived:not(.is-output) .field-control {
  border-color: #b9d8ca;
  background: #f7fcf9;
}

.field-row.is-checkbox .field-input-stack {
  grid-column: 2;
}

.checkbox-control {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  gap: 10px;
  color: #3f4a46;
  font-size: 13px;
  cursor: pointer;
}

.checkbox-control input {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--green-2);
}

.checkbox-control span {
  overflow-wrap: anywhere;
}

.field-label {
  min-width: 0;
  color: #3f4a46;
  font-size: 13px;
  overflow-wrap: anywhere;
}

.field-input-stack {
  display: grid;
  gap: 5px;
  min-width: 0;
}

.field-control {
  display: grid;
  grid-template-columns: auto minmax(70px, 1fr) auto auto;
  align-items: center;
  min-width: 0;
  min-height: 42px;
  overflow: hidden;
  border: 1px solid #ccd6d1;
  border-radius: var(--radius);
  background: var(--paper);
}

.field-control.has-denominator-units {
  display: flex;
  align-items: center;
}

.field-control.has-denominator-units input,
.field-control.has-denominator-units textarea,
.field-control.has-denominator-units output {
  flex: 1 1 104px;
  width: 0;
}

.field-control.has-denominator-units select {
  flex: 0 1 104px;
  width: auto;
  min-width: 68px;
  max-width: 104px;
}

.field-control.has-denominator-units .denominator-prefix {
  flex: 0 0 auto;
  padding-inline: 4px;
}

.field-control:focus-within {
  border-color: var(--green-2);
  box-shadow: 0 0 0 3px rgb(36 107 85 / 10%);
}

.field-input-stack > select,
.field-control input,
.field-control select,
.field-control textarea {
  min-width: 0;
  min-height: 40px;
  border: 0;
  outline: 0;
  background: transparent;
}

.field-input-stack > select {
  width: 100%;
  padding: 0 10px;
  border: 1px solid #ccd6d1;
  border-radius: var(--radius);
}

.field-control input {
  width: 100%;
  padding: 0 10px;
}

.field-control-textarea {
  grid-template-columns: minmax(0, 1fr);
  min-height: 92px;
}

.field-control textarea {
  width: 100%;
  min-height: 90px;
  padding: 10px;
  resize: vertical;
  line-height: 1.5;
}

.field-control input.is-derived {
  color: var(--green-2);
  font-weight: 650;
}

.field-output-control output {
  display: flex;
  align-items: center;
  min-width: 0;
  min-height: 40px;
  padding: 0 10px;
  overflow-wrap: anywhere;
}

.field-output-control output.is-derived {
  color: var(--green-2);
  font-weight: 750;
  font-size: 16px;
}

.field-control select {
  max-width: 126px;
  padding: 0 28px 0 9px;
  border-left: 1px solid var(--soft-line);
  color: #5f6965;
  font-size: 12px;
}

.field-control.has-denominator-units select {
  max-width: 110px;
}

.field-affix {
  padding: 0 8px;
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}

.field-error {
  color: #a13f35;
  font-size: 12px;
  line-height: 1.4;
}

[aria-invalid="true"] {
  outline: 2px solid rgb(193 79 66 / 24%);
  outline-offset: -2px;
}

.calculator-copy {
  padding: 9px 11px;
  border-left: 3px solid #b9c9c1;
  background: #f7f9f8;
  color: #4e5a55;
  font-size: 13px;
  line-height: 1.55;
  white-space: pre-line;
}

.calculator-copy-information,
.calculator-copy-positive {
  border-left-color: var(--green-2);
  background: #f1f8f5;
}

.calculator-copy-warning,
.calculator-copy-negative {
  border-left-color: var(--coral);
  background: #fff3f1;
}

.calculator-figure {
  margin: 0;
}

.calculator-figure img {
  display: block;
  width: auto;
  max-width: 100%;
  max-height: 320px;
  margin: 0 auto;
  object-fit: contain;
}

.calculator-figure figcaption {
  margin-top: 7px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

.calculator-chart {
  min-height: 80px;
  padding: 10px;
  border: 1px solid var(--soft-line);
  color: var(--muted);
  font-size: 12px;
  overflow-wrap: anywhere;
}

.calculator-messages {
  margin: 8px 0 14px;
  padding: 10px 12px;
  border-left: 3px solid var(--coral);
  background: #fff3f1;
  color: #7f3b34;
  font-size: 13px;
}

.calculator-actions {
  display: flex;
  justify-content: flex-end;
  padding-top: 4px;
}

.secondary-button {
  min-height: 36px;
  padding: 6px 11px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  color: #53605b;
}

.secondary-button:hover {
  border-color: #afbeb7;
}

.tool-meta {
  position: sticky;
  top: 86px;
  padding-top: 4px;
  color: #3f4a46;
}

.tool-meta > strong {
  display: block;
  margin-top: 3px;
  font-size: 15px;
}

.back-link {
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
  padding: 13px 2px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--green-2);
  font-weight: 650;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  min-height: 76px;
  padding: 26px clamp(18px, 4vw, 56px);
  border-top: 1px solid var(--line);
  background: var(--paper);
  color: var(--muted);
  font-size: 13px;
}

.site-footer span:first-child {
  color: var(--green);
  font-weight: 750;
}

.not-found {
  display: grid;
  place-items: start;
  align-content: center;
  min-height: calc(100vh - 140px);
  width: min(760px, calc(100% - 36px));
  margin: auto;
}

.not-found a {
  color: var(--green-2);
  font-weight: 700;
}

@media (max-width: 900px) {
  .site-header {
    grid-template-columns: auto minmax(160px, 1fr) auto;
    padding-inline: 18px;
  }

  .site-header-compact {
    grid-template-columns: 1fr auto;
  }

  .header-nav a {
    display: none;
  }

  .app-shell {
    grid-template-columns: 1fr;
    gap: 20px;
    padding-inline: 18px;
  }

  .category-sidebar {
    position: static;
    overflow: visible;
  }

  .sidebar-heading {
    display: none;
  }

  .category-list {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 7px;
  }

  .category-filter {
    grid-template-columns: 28px minmax(0, 1fr) auto;
    width: 100%;
    padding-inline: 7px 10px;
    border: 1px solid var(--line);
    background: var(--paper);
  }

  .category-filter > span:nth-child(2) {
    overflow-wrap: anywhere;
  }

  .category-filter.is-active {
    border-color: #a9c4b8;
    box-shadow: none;
  }

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

  .tool-meta {
    position: static;
  }
}

@media (max-width: 680px) {
  .catalog-toolbar {
    min-height: 66px;
  }

  h1 {
    font-size: 23px;
  }

  .catalog-count span {
    display: none;
  }

  .tool-row {
    grid-template-columns: minmax(0, 1fr) 42px;
  }

  .tool-row-main {
    grid-template-columns: 34px minmax(0, 1fr) 18px;
    gap: 9px;
    padding-left: 10px;
  }

  .tool-row-main .status {
    display: none;
  }
}

@media (max-width: 560px) {
  .site-header {
    grid-template-columns: auto 1fr auto;
    min-height: 58px;
    padding: 9px 12px;
  }

  .brand span {
    display: none;
  }

  .header-search {
    min-height: 40px;
  }

  .header-search kbd,
  .header-nav {
    display: none;
  }

  .category-page,
  .tool-page {
    width: min(100% - 24px, 1120px);
    padding-top: 18px;
  }

  .breadcrumbs {
    margin-bottom: 20px;
  }

  .section-heading,
  .tool-heading {
    margin-bottom: 22px;
  }

  .tool-heading {
    gap: 0;
    margin-bottom: 16px;
  }

  .tool-heading > .category-mark {
    display: none;
  }

  .calculator-root {
    padding: 14px;
  }

  .tool-meta .eyebrow,
  .tool-meta > strong {
    display: none;
  }

  .tool-meta .back-link {
    margin-top: -10px;
  }

  .site-footer {
    min-height: 64px;
    padding: 20px 18px;
  }

  .site-footer span:last-child {
    display: none;
  }
}

@container (max-width: 560px) {
  .field-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .field-row.is-checkbox .field-input-stack {
    grid-column: auto;
  }

  .field-matrix {
    grid-template-columns: 1fr;
  }

  .field-control {
    width: 100%;
  }

  .field-control.has-denominator-units {
    display: flex;
  }

  .field-control.has-denominator-units select {
    max-width: 104px;
  }
}

@container (max-width: 340px) {
  .field-control.has-denominator-units {
    flex-wrap: wrap;
  }

  .field-control.has-denominator-units input,
  .field-control.has-denominator-units textarea,
  .field-control.has-denominator-units output {
    flex-basis: calc(100% - 2px);
    width: 100%;
    border-bottom: 1px solid var(--soft-line);
  }

  .field-control.has-denominator-units select {
    flex: 1 1 88px;
    max-width: none;
  }
}

@container (max-width: 720px) {
  .field-matrix-columns-3,
  .field-matrix-columns-4,
  .field-matrix-columns-5,
  .field-matrix-columns-6 {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
  }
}