:root {
  --blue: #0969da;
  --blue-dark: #0550ae;
  --black: #090909;
  --white: #ffffff;
  --grey-050: #f7f7f5;
  --grey-100: #efefec;
  --grey-300: #c8c8c2;
  --grey-600: #666661;
  --green: #0d6b3b;
  --amber: #8a4f00;
  --red: #9f2233;
  --rule: 1px solid var(--black);
  --pad: clamp(1rem, 3vw, 3rem);
  color-scheme: light;
  font-family: "Hanken Grotesk", Arial, sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--white);
  color: var(--black);
  font-size: 16px;
  line-height: 1.45;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

button,
input,
select {
  font: inherit;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 0;
  padding: 0.75rem 1rem;
  background: var(--black);
  color: var(--white);
  transform: translateY(-110%);
}

.skip-link:focus {
  transform: none;
}

.site-header {
  min-height: 68px;
  padding: 0 var(--pad);
  border-bottom: var(--rule);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-header .wordmark {
  text-decoration: none;
}

.site-header p {
  margin: 0;
  color: var(--grey-600);
}

.site-header nav {
  justify-self: end;
  display: flex;
  gap: 1.5rem;
}

.hero {
  min-height: 0;
  padding: clamp(3rem, 6vw, 5rem) var(--pad);
  border-bottom: var(--rule);
  background: var(--white);
  color: var(--black);
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.eyebrow,
.section-number,
.tool-category,
.interface-name,
.verified {
  margin: 0;
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 18ch;
  margin: 0;
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-size: clamp(3rem, 7vw, 7rem);
  font-weight: 600;
  letter-spacing: -0.065em;
  line-height: 0.95;
}

.hero h1 em {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
}

.hero-bottom {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(180px, 1fr);
  align-items: end;
  gap: 3rem;
}

.lede {
  max-width: 900px;
  margin: 0;
  font-size: clamp(1.05rem, 1.6vw, 1.35rem);
  line-height: 1.45;
}

.publisher {
  margin: 1rem 0 0;
  color: var(--grey-600);
  font-size: 0.86rem;
}

.edition {
  justify-self: end;
  margin: 0;
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  line-height: 1.6;
  text-align: right;
  text-transform: uppercase;
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-bottom: var(--rule);
  background: var(--grey-050);
}

.signal-strip div {
  min-height: 112px;
  padding: 1.5rem var(--pad);
  border-right: var(--rule);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.signal-strip div:last-child {
  border-right: 0;
}

.signal-strip strong {
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-size: clamp(2rem, 3.5vw, 3.5rem);
  font-weight: 600;
  letter-spacing: -0.06em;
  line-height: 1;
}

.signal-strip span {
  font-size: 0.85rem;
}

.premise,
.maintenance {
  padding: clamp(3rem, 6vw, 5rem) var(--pad);
  border-bottom: var(--rule);
  display: grid;
  grid-template-columns: minmax(130px, 0.5fr) minmax(320px, 1.45fr) minmax(300px, 1fr);
  gap: clamp(2rem, 5vw, 6rem);
}

.premise h2,
.maintenance h2,
.index-heading h2 {
  margin: 0;
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-size: clamp(2.2rem, 4vw, 4rem);
  font-weight: 600;
  letter-spacing: -0.06em;
  line-height: 0.95;
}

.premise > div > p {
  max-width: 760px;
  margin: 2rem 0 0;
  font-size: clamp(1.1rem, 1.8vw, 1.5rem);
}

.premise dl {
  margin: 0;
}

.premise dl div {
  padding: 1rem 0;
  border-top: var(--rule);
}

.premise dt {
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-weight: 600;
}

.premise dd {
  margin: 0.35rem 0 0;
  color: var(--grey-600);
}

.section-nav {
  padding: clamp(2.5rem, 5vw, 4rem) var(--pad);
  border-bottom: var(--rule);
  display: grid;
  grid-template-columns: minmax(250px, 0.55fr) minmax(0, 1.45fr);
  gap: clamp(2rem, 5vw, 6rem);
}

.section-nav h2 {
  max-width: 12ch;
  margin: 1.25rem 0 0;
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-size: clamp(2rem, 3.5vw, 3.5rem);
  font-weight: 600;
  letter-spacing: -0.055em;
  line-height: 0.98;
}

.section-buttons {
  border-top: var(--rule);
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.section-buttons button {
  min-height: 72px;
  padding: 0.9rem 1rem;
  border: 0;
  border-right: var(--rule);
  border-bottom: var(--rule);
  background: var(--white);
  color: var(--black);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  text-align: left;
}

.section-buttons button:nth-child(even) {
  border-right: 0;
}

.section-buttons button:hover,
.section-buttons button:focus-visible,
.section-buttons button.is-active {
  background: var(--black);
  color: var(--white);
}

.section-buttons strong {
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-size: 1.45rem;
  font-weight: 600;
}

.index-shell {
  padding: clamp(3rem, 6vw, 5rem) var(--pad);
}

.index-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
}

.index-heading h2 {
  margin-top: 1.25rem;
}

.result-count {
  margin: 0;
  padding-bottom: 0.4rem;
  font-variant-numeric: tabular-nums;
}

.filters {
  margin-top: clamp(3rem, 6vw, 6rem);
  border: var(--rule);
  display: grid;
  grid-template-columns: minmax(220px, 1.55fr) repeat(6, minmax(105px, 1fr)) auto;
}

.filters label {
  min-width: 0;
  padding: 0.75rem 1rem 0.65rem;
  border-right: var(--rule);
}

.filters label > span {
  display: block;
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.filters input,
.filters select {
  width: 100%;
  height: 2rem;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--black);
  outline: 0;
}

.filters input:focus,
.filters select:focus {
  box-shadow: 0 2px 0 var(--blue);
}

.search-control {
  position: relative;
}

.search-control kbd {
  position: absolute;
  right: 1rem;
  bottom: 0.85rem;
  border: 1px solid var(--grey-300);
  padding: 0 0.35rem;
  color: var(--grey-600);
  font-family: inherit;
  font-size: 0.72rem;
}

.filters button,
.empty-state button {
  border: 0;
  border-radius: 0;
  padding: 0 1.4rem;
  background: var(--black);
  color: var(--white);
  cursor: pointer;
}

.filters button:hover,
.filters button:focus-visible,
.empty-state button:hover,
.empty-state button:focus-visible {
  background: var(--blue);
}

.column-key {
  min-height: 54px;
  border-bottom: var(--rule);
  display: grid;
  grid-template-columns: 64px minmax(300px, 1.35fr) minmax(220px, 0.75fr) minmax(100px, 0.3fr);
  align-items: end;
  gap: 1.25rem;
  padding: 1rem 0 0.65rem;
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.tool-row {
  border-bottom: var(--rule);
  display: grid;
  grid-template-columns: 64px minmax(300px, 1.35fr) minmax(220px, 0.75fr) minmax(100px, 0.3fr);
  gap: 1.25rem;
  padding: 2rem 0 1.5rem;
  scroll-margin-top: 1rem;
}

.tool-row[hidden] {
  display: none;
}

.tool-index {
  color: var(--grey-600);
  font-variant-numeric: tabular-nums;
}

.tool-summary h2 {
  margin: 0.2rem 0 0.65rem;
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-size: clamp(1.6rem, 2.4vw, 2.6rem);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 1;
}

.tool-summary h2 a {
  text-decoration: none;
}

.tool-summary h2 a:hover,
.tool-summary h2 a:focus-visible {
  color: var(--blue);
}

.tool-summary > p:not(.tool-category):not(.tool-tags):not(.tool-rating) {
  max-width: 58ch;
  margin: 0;
  color: #242424;
}

.tool-rating {
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.55rem;
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.tool-rating strong {
  min-width: 2.35rem;
  padding: 0.22rem 0.45rem;
  border: 1px solid var(--black);
  background: var(--grey-050);
  color: var(--black);
  font-size: 0.9rem;
  text-align: center;
}

.tool-rating span {
  color: var(--grey-600);
}

.tool-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.85rem;
  margin: 1rem 0 0;
  color: var(--grey-600);
  font-size: 0.72rem;
}

.route-judged {
  align-self: start;
  font-size: 0.82rem;
}

.route-judged > span {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--grey-600);
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.route-judged strong {
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-weight: 600;
}

.route-judged p {
  margin: 0.35rem 0 0;
  color: var(--grey-600);
}

.interfaces {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-content: start;
  margin-top: 1.2rem;
  border-top: 1px solid var(--grey-300);
  border-left: 1px solid var(--grey-300);
}

.interface {
  min-height: 78px;
  padding: 0.7rem;
  border-right: 1px solid var(--grey-300);
  border-bottom: 1px solid var(--grey-300);
  display: grid;
  grid-template-columns: 1fr auto;
  align-content: space-between;
  gap: 0.4rem;
  text-decoration: none;
}

.interface-name {
  grid-column: 1 / -1;
  color: var(--grey-600);
  font-size: 0.6rem;
}

.interface-value {
  font-size: 0.78rem;
  line-height: 1.2;
}

a.interface:hover,
a.interface:focus-visible {
  background: var(--blue);
  color: var(--white);
}

a.interface:hover .interface-name,
a.interface:focus-visible .interface-name {
  color: var(--white);
}

.interface-absent {
  color: var(--grey-600);
  background: var(--grey-050);
}

.interface-watch {
  box-shadow: inset 4px 0 0 #d88b17;
}

.interface-restricted {
  box-shadow: inset 4px 0 0 #c74153;
}

.tool-detail {
  grid-column: 2 / -1;
  min-width: 0;
  margin-top: 0.75rem;
  border-top: 1px solid var(--grey-300);
}

.blocker {
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid var(--grey-300);
  background: #fff2f3;
  display: grid;
  grid-template-columns: minmax(150px, 0.35fr) minmax(0, 1.65fr);
  gap: 1.25rem;
}

.blocker span,
.operation span,
.workflow-notes h3 {
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.blocker span {
  color: var(--red);
}

.blocker p {
  margin: 0;
  font-size: 1rem;
  font-weight: 500;
}

.operation-grid {
  border-bottom: 1px solid var(--grey-300);
  border-left: 1px solid var(--grey-300);
  display: grid;
  grid-template-columns: repeat(6, 1fr);
}

.operation {
  min-height: 82px;
  padding: 0.75rem;
  border-right: 1px solid var(--grey-300);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.75rem;
}

.operation span {
  color: var(--grey-600);
}

.operation strong {
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-size: 1rem;
  font-weight: 600;
}

.operation-no,
.operation-hard,
.operation-specialist {
  box-shadow: inset 4px 0 0 var(--red);
}

.operation-partial,
.operation-unverified,
.operation-depends,
.operation-moderate {
  box-shadow: inset 4px 0 0 #d88b17;
}

.operation-yes,
.operation-easy,
.operation-broad {
  box-shadow: inset 4px 0 0 var(--green);
}

.workflow-notes {
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--grey-300);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.workflow-notes h3 {
  margin: 0 0 0.45rem;
}

.workflow-notes p {
  margin: 0;
  font-size: 0.9rem;
}

.editorial-grid {
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--grey-300);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.editorial-grid > div {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.8rem;
}

.editorial-grid h3 {
  margin: 0;
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-size: 1.3rem;
  line-height: 1;
}

.editorial-grid ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.86rem;
}

.editorial-grid li + li {
  margin-top: 0.4rem;
}

.editorial-grid .positive h3 {
  color: var(--green);
}

.editorial-grid .negative h3 {
  color: var(--red);
}

.detail-grid {
  padding: 1.2rem 0 1.5rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.detail-grid h3 {
  margin: 0 0 0.5rem;
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.detail-grid p {
  margin: 0;
  font-size: 0.86rem;
}

.commercial-link {
  margin-bottom: 0.45rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  text-decoration: none;
}

.commercial-link strong {
  padding: 0.12rem 0.38rem;
  border: 1px solid var(--black);
  font-size: 0.68rem;
  text-transform: uppercase;
}

.commercial-link span:not([aria-hidden]) {
  flex: 1;
}

a.commercial-link:hover,
a.commercial-link:focus-visible {
  color: var(--blue);
}

.source-links {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.4rem;
}

.verified {
  padding-bottom: 0.4rem;
  color: var(--grey-600);
  font-size: 0.6rem;
}

.empty-state {
  padding: 5rem 0;
  text-align: center;
}

.empty-state p {
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-size: 2rem;
  font-weight: 600;
}

.empty-state button {
  min-height: 48px;
}

.maintenance {
  background: var(--grey-100);
}

.maintenance h2 {
  max-width: 10ch;
}

.maintenance > div {
  align-self: end;
  font-size: 1.1rem;
}

.text-link {
  display: inline-block;
  margin-top: 1rem;
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

footer {
  min-height: 150px;
  padding: 2rem var(--pad);
  border-top: var(--rule);
  background: var(--grey-050);
  color: var(--black);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  align-items: end;
  gap: 2rem;
}

footer p {
  margin: 0;
}

footer p:first-child {
  font-family: "Kumbh Sans", Arial, sans-serif;
  font-weight: 600;
}

footer p:last-child {
  color: var(--grey-600);
  font-size: 0.78rem;
  text-align: right;
}

@media (max-width: 1100px) {
  .filters {
    grid-template-columns: repeat(3, 1fr);
  }

  .filters label {
    border-bottom: var(--rule);
  }

  .filters button {
    min-height: 64px;
  }

  .column-key {
    display: none;
  }

  .tool-list {
    margin-top: 3rem;
    border-top: var(--rule);
  }

  .tool-row {
    grid-template-columns: 48px minmax(260px, 1fr) minmax(200px, 0.65fr) minmax(90px, 0.25fr);
  }

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

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

  .tool-detail {
    grid-column: 2 / -1;
  }

  .detail-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 760px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .site-header > p {
    display: none;
  }

  .site-header nav a:first-child {
    display: none;
  }

  .hero {
    min-height: 0;
    padding-top: 3rem;
  }

  .hero h1 {
    max-width: none;
    font-size: clamp(2.7rem, 13vw, 4.8rem);
    line-height: 0.95;
  }

  .hero-bottom {
    min-width: 0;
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
  }

  .lede {
    min-width: 0;
    font-size: 1.15rem;
  }

  .edition {
    justify-self: start;
    text-align: left;
  }

  .signal-strip {
    grid-template-columns: 1fr 1fr;
  }

  .signal-strip div {
    min-height: 130px;
    border-bottom: var(--rule);
  }

  .signal-strip div:nth-child(2) {
    border-right: 0;
  }

  .premise,
  .maintenance,
  .section-nav {
    grid-template-columns: minmax(0, 1fr);
  }

  .section-nav h2 {
    max-width: none;
  }

  .index-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .filters {
    grid-template-columns: 1fr 1fr;
  }

  .filters label:nth-child(even) {
    border-right: 0;
  }

  .filters .search-control {
    grid-column: 1 / -1;
    border-right: 0;
  }

  .filters button {
    min-height: 60px;
  }

  .tool-row {
    grid-template-columns: 32px 1fr;
    gap: 1rem;
  }

  .tool-summary,
  .route-judged,
  .tool-rating,
  .tool-detail {
    min-width: 0;
    grid-column: 2;
  }

  .route-judged,
  .tool-rating {
    padding-top: 0.75rem;
    border-top: 1px solid var(--grey-300);
  }

  .blocker {
    grid-template-columns: 1fr;
    gap: 0.55rem;
  }

  .operation-grid {
    grid-template-columns: 1fr 1fr;
  }

  .workflow-notes,
  .editorial-grid {
    grid-template-columns: 1fr;
  }

  .detail-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  footer {
    grid-template-columns: 1fr;
  }

  footer p:last-child {
    text-align: left;
  }
}

@media (max-width: 460px) {
  .filters {
    grid-template-columns: 1fr;
  }

  .filters label,
  .filters label:nth-child(even) {
    border-right: 0;
  }

  .section-buttons,
  .interfaces {
    grid-template-columns: 1fr;
  }

  .section-buttons button,
  .section-buttons button:nth-child(even) {
    border-right: 0;
  }

  .interface {
    min-height: 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}