:root {
  color-scheme: light;
  --ink: #10110f;
  --ink-soft: #34352f;
  --paper: #f4f0e5;
  --paper-deep: #e8e1d2;
  --line: #22231f;
  --signal: #e8ff48;
  --orange: #f36d3d;
  --blue: #6cb9f2;
  --mint: #65d8a1;
  --muted: #716f65;
  --white: #fffdf6;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --content: 84rem;
  --sans:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

button,
input {
  font: inherit;
}

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 0.14em;
}

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

:focus-visible {
  outline: 0.2rem solid var(--orange);
  outline-offset: 0.2rem;
}

.task[hidden],
[hidden] {
  display: none;
}

.skip-link {
  position: fixed;
  top: var(--space-3);
  left: var(--space-3);
  z-index: 100;
  padding: var(--space-3) var(--space-4);
  background: var(--signal);
  color: var(--ink);
  font-weight: 800;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.5rem;
  padding: var(--space-3) max(var(--space-5), calc((100vw - var(--content)) / 2));
  border-bottom: 0.08rem solid #4b4c46;
  background: var(--ink);
  color: var(--white);
}

.wordmark {
  display: inline-flex;
  gap: var(--space-3);
  align-items: center;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.wordmark span:first-child {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 0.08rem solid var(--signal);
  background: var(--signal);
  color: var(--ink);
  font-size: 0.65rem;
}

.site-header nav {
  display: flex;
  gap: var(--space-6);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-header nav a {
  text-decoration: none;
}

.site-header nav a:hover {
  color: var(--signal);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(20rem, 0.65fr);
  min-height: 43rem;
  border-bottom: 0.1rem solid var(--line);
}

.hero__copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-20) max(var(--space-5), calc((100vw - var(--content)) / 2));
  padding-right: clamp(var(--space-8), 6vw, var(--space-20));
}

.eyebrow {
  margin: 0 0 var(--space-4);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 13ch;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(4rem, 9.2vw, 9rem);
  font-weight: 500;
  letter-spacing: -0.075em;
  line-height: 0.82;
}

.hero h1 span {
  display: block;
  color: var(--orange);
  font-style: italic;
}

.hero__lede {
  max-width: 43rem;
  margin: var(--space-10) 0 0;
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  font-weight: 550;
  line-height: 1.4;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.button {
  display: inline-flex;
  min-height: 3rem;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-5);
  border: 0.1rem solid var(--ink);
  background: transparent;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-decoration: none;
  text-transform: uppercase;
}

.button:hover {
  background: var(--ink);
  color: var(--white);
}

.button--primary {
  background: var(--signal);
}

.route-rule {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-12) clamp(var(--space-6), 4vw, var(--space-12));
  border-left: 0.1rem solid var(--line);
  background: var(--ink);
  color: var(--white);
}

.route-rule__label {
  margin: 0 0 var(--space-8);
  color: var(--signal);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.route-rule ol {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.route-rule li {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: var(--space-4);
  padding: var(--space-6) 0;
  border-top: 0.08rem solid #4b4c46;
}

.route-rule li:last-child {
  border-bottom: 0.08rem solid #4b4c46;
}

.route-rule li > span {
  color: var(--signal);
  font-family: var(--mono);
  font-size: 0.75rem;
}

.route-rule p {
  margin: 0;
  color: #c8c7c0;
}

.route-rule strong {
  display: block;
  margin-bottom: var(--space-1);
  color: var(--white);
  font-size: 1.05rem;
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(8rem, 1fr)) minmax(16rem, 1.7fr);
  max-width: var(--content);
  margin: 0 auto;
  border-right: 0.08rem solid var(--line);
  border-left: 0.08rem solid var(--line);
}

.proof-strip > * {
  min-height: 8rem;
  margin: 0;
  padding: var(--space-5);
  border-right: 0.08rem solid var(--line);
}

.proof-strip > *:last-child {
  border-right: 0;
}

.proof-strip div {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.proof-strip strong {
  font-family: var(--serif);
  font-size: 3rem;
  font-weight: 500;
  line-height: 1;
}

.proof-strip > div > span,
.proof-strip p {
  align-self: end;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.proof-strip p {
  display: flex;
  align-items: end;
  background: var(--signal);
  color: var(--ink);
}

.catalog,
.method,
.sources {
  max-width: var(--content);
  margin: 0 auto;
  padding: var(--space-20) max(var(--space-5), 3vw);
  border-right: 0.08rem solid var(--line);
  border-left: 0.08rem solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(18rem, 0.65fr);
  gap: var(--space-12);
  align-items: end;
  margin-bottom: var(--space-12);
}

.section-heading h2,
.frontier h2 {
  max-width: 18ch;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.7rem, 5.5vw, 5rem);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 0.98;
}

.section-heading > p {
  max-width: 35rem;
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.filter-bar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: grid;
  grid-template-columns: minmax(16rem, 1fr) auto auto;
  gap: var(--space-4);
  align-items: end;
  margin: 0 calc(max(var(--space-5), 3vw) * -1);
  padding: var(--space-4) max(var(--space-5), 3vw);
  border-top: 0.1rem solid var(--line);
  border-bottom: 0.1rem solid var(--line);
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  backdrop-filter: blur(0.75rem);
}

.search {
  position: relative;
}

.search label {
  display: block;
  margin-bottom: var(--space-2);
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.search input {
  width: 100%;
  min-height: 2.75rem;
  padding: var(--space-3) 3rem var(--space-3) var(--space-3);
  border: 0.1rem solid var(--ink);
  border-radius: 0;
  background: var(--white);
  color: var(--ink);
}

.search input::placeholder {
  color: var(--muted);
}

.search kbd {
  position: absolute;
  right: var(--space-3);
  bottom: 0.72rem;
  padding: 0.08rem var(--space-2);
  border: 0.08rem solid var(--muted);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.filters button,
.share-button,
.empty-state button {
  min-height: 2.75rem;
  padding: var(--space-2) var(--space-3);
  border: 0.08rem solid var(--ink);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.filters button:hover,
.filters button[aria-pressed="true"],
.share-button:hover,
.empty-state button:hover {
  background: var(--ink);
  color: var(--white);
}

.share-button {
  background: var(--signal);
  white-space: nowrap;
}

.results {
  margin: var(--space-6) 0 var(--space-3);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
}

.task-list {
  border-top: 0.1rem solid var(--line);
}

.task {
  display: grid;
  grid-template-columns: 4rem minmax(15rem, 0.8fr) minmax(20rem, 1.2fr);
  border-bottom: 0.1rem solid var(--line);
}

.task:hover {
  background: var(--white);
}

.task__index {
  padding: var(--space-6) var(--space-3);
  border-right: 0.08rem solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.task__main,
.task__decision {
  padding: var(--space-6);
}

.task__main {
  border-right: 0.08rem solid var(--line);
}

.task__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  margin-bottom: var(--space-5);
}

.route {
  display: inline-flex;
  gap: var(--space-2);
  align-items: center;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.route__dot {
  width: 0.65rem;
  height: 0.65rem;
  border: 0.08rem solid var(--ink);
  background: var(--signal);
}

.route--local .route__dot {
  background: var(--mint);
}

.route--efficient .route__dot {
  background: var(--blue);
}

.route--balanced .route__dot {
  background: var(--orange);
}

.task__category {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
}

.task h3 {
  max-width: 24ch;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.6rem, 2.5vw, 2.3rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.05;
}

.task__name {
  margin: var(--space-5) 0 0;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.task__label {
  margin-right: var(--space-2);
  color: var(--muted);
  font-size: 0.65rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.task__recommendation {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 750;
}

.task__why {
  margin: var(--space-3) 0 var(--space-5);
  color: var(--ink-soft);
}

.task details {
  border-top: 0.08rem solid var(--paper-deep);
}

.task summary {
  padding: var(--space-3) 0;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.task summary:hover {
  color: #9a2e12;
}

.task__details {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-2) 0 var(--space-4);
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.task__details p {
  margin: 0;
}

.task__details strong {
  display: block;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.task__sources a {
  color: #8b2d15;
}

.empty-state {
  padding: var(--space-16);
  border-bottom: 0.1rem solid var(--line);
  text-align: center;
}

.empty-state p {
  margin: 0 0 var(--space-4);
  font-family: var(--serif);
  font-size: 2rem;
}

.frontier {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(20rem, 1.2fr);
  gap: var(--space-16);
  max-width: var(--content);
  margin: 0 auto;
  padding: var(--space-20) max(var(--space-5), 3vw);
  border: 0.08rem solid var(--line);
  background: var(--ink);
  color: var(--white);
}

.frontier h2 {
  color: var(--signal);
}

.frontier > div > p:last-child {
  max-width: 34rem;
  margin-top: var(--space-6);
  color: #c8c7c0;
  font-size: 1.05rem;
}

.frontier ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  border-top: 0.08rem solid #4b4c46;
  list-style: none;
}

.frontier li {
  position: relative;
  min-height: 7rem;
  padding: var(--space-6) var(--space-5) var(--space-6) var(--space-10);
  border-right: 0.08rem solid #4b4c46;
  border-bottom: 0.08rem solid #4b4c46;
  color: #deddd5;
}

.frontier li:nth-child(even) {
  border-right: 0;
}

.frontier li::before {
  position: absolute;
  top: var(--space-6);
  left: var(--space-4);
  color: var(--orange);
  content: "↗";
  font-family: var(--mono);
  font-weight: 800;
}

.method {
  background: var(--white);
}

.method__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 0.1rem solid var(--line);
  border-left: 0.1rem solid var(--line);
}

.method__grid article {
  min-height: 18rem;
  padding: var(--space-6);
  border-right: 0.1rem solid var(--line);
  border-bottom: 0.1rem solid var(--line);
}

.method__grid article > span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.method__grid h3 {
  margin: var(--space-16) 0 var(--space-4);
  font-family: var(--serif);
  font-size: 1.55rem;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.method__grid p {
  margin: 0;
  color: var(--ink-soft);
}

.method__note {
  display: grid;
  grid-template-columns: 12rem 1fr;
  margin-top: var(--space-8);
  padding: var(--space-5);
  border: 0.1rem solid var(--line);
  background: var(--signal);
}

.method__note strong {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.method__note p {
  max-width: 48rem;
  margin: 0;
}

.sources {
  background: var(--paper-deep);
}

.source-list {
  margin: 0;
  padding: 0;
  border-top: 0.1rem solid var(--line);
  list-style: none;
  counter-reset: sources;
}

.source-list li {
  display: grid;
  grid-template-columns: minmax(16rem, 0.75fr) minmax(20rem, 1.25fr);
  gap: var(--space-8);
  padding: var(--space-5) 0;
  border-bottom: 0.08rem solid var(--line);
  counter-increment: sources;
}

.source-list li > div {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: var(--space-3);
  align-items: start;
}

.source-list li > div::before {
  color: var(--muted);
  content: counter(sources, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.source-list a {
  font-family: var(--serif);
  font-size: 1.18rem;
  font-weight: 700;
  line-height: 1.2;
}

.source__authority {
  grid-column: 2;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.source-list p {
  margin: 0;
  color: var(--ink-soft);
}

.sources__reviewed {
  max-width: 45rem;
  margin: var(--space-8) 0 0 auto;
  padding-left: var(--space-5);
  border-left: 0.3rem solid var(--orange);
  color: var(--ink-soft);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: var(--space-6);
  padding: var(--space-8) max(var(--space-5), calc((100vw - var(--content)) / 2));
  background: var(--ink);
  color: #c8c7c0;
  font-family: var(--mono);
  font-size: 0.7rem;
}

.site-footer p {
  margin: 0;
}

.site-footer strong {
  color: var(--white);
}

.site-footer a {
  color: var(--signal);
  text-decoration-thickness: 0.08rem;
  text-underline-offset: 0.2rem;
}

.site-footer a:hover {
  color: var(--white);
}

.toast {
  position: fixed;
  right: var(--space-5);
  bottom: var(--space-5);
  z-index: 20;
  padding: var(--space-3) var(--space-5);
  border: 0.1rem solid var(--white);
  background: var(--ink);
  color: var(--white);
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 800;
}

.not-found {
  display: grid;
  min-height: 100vh;
  place-items: center;
  background: var(--ink);
  color: var(--white);
}

.not-found main {
  width: min(45rem, calc(100% - var(--space-10)));
  padding: var(--space-12);
  border: 0.1rem solid #4b4c46;
}

.not-found h1 {
  margin: 0 0 var(--space-5);
  color: var(--signal);
  font-family: var(--serif);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 500;
  letter-spacing: -0.06em;
  line-height: 0.95;
}

.not-found .button {
  margin-top: var(--space-6);
  color: var(--ink);
}

@media (max-width: 68rem) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero__copy {
    min-height: 38rem;
  }

  .route-rule {
    border-top: 0.1rem solid var(--line);
    border-left: 0;
  }

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

  .route-rule li {
    grid-template-columns: 2rem 1fr;
    padding-right: var(--space-5);
    border-bottom: 0.08rem solid #4b4c46;
  }

  .filter-bar {
    grid-template-columns: 1fr auto;
  }

  .filters {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .task {
    grid-template-columns: 3.5rem minmax(14rem, 0.8fr) minmax(18rem, 1.2fr);
  }

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

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

@media (max-width: 48rem) {
  html {
    scroll-padding-top: 2rem;
  }

  .site-header {
    align-items: flex-start;
  }

  .wordmark span:last-child {
    display: none;
  }

  .site-header nav {
    gap: var(--space-4);
  }

  .hero__copy {
    min-height: 34rem;
    padding-top: var(--space-16);
    padding-bottom: var(--space-16);
  }

  .hero h1 {
    font-size: clamp(3.8rem, 18vw, 6.5rem);
  }

  .route-rule ol {
    grid-template-columns: 1fr;
  }

  .proof-strip {
    grid-template-columns: repeat(3, 1fr);
    border-right: 0;
    border-left: 0;
  }

  .proof-strip > * {
    min-height: 7rem;
    padding: var(--space-4);
  }

  .proof-strip > p {
    grid-column: 1 / -1;
    min-height: auto;
    border-top: 0.08rem solid var(--line);
  }

  .catalog,
  .method,
  .sources {
    padding-top: var(--space-16);
    padding-bottom: var(--space-16);
    border-right: 0;
    border-left: 0;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .filter-bar {
    position: relative;
    top: auto;
    grid-template-columns: 1fr;
  }

  .filters {
    grid-column: auto;
    grid-row: auto;
  }

  .filters button {
    flex: 1 1 auto;
  }

  .share-button {
    justify-self: start;
  }

  .task {
    grid-template-columns: 3rem 1fr;
  }

  .task__index {
    grid-row: 1 / 3;
  }

  .task__main {
    border-right: 0;
    border-bottom: 0.08rem solid var(--paper-deep);
  }

  .task__main,
  .task__decision {
    padding: var(--space-5);
  }

  .frontier {
    border-right: 0;
    border-left: 0;
  }

  .frontier ul {
    grid-template-columns: 1fr;
  }

  .frontier li,
  .frontier li:nth-child(even) {
    min-height: auto;
    border-right: 0;
  }

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

  .method__grid article {
    min-height: auto;
  }

  .method__grid h3 {
    margin-top: var(--space-8);
  }

  .method__note {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .source-list li {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

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

@media (max-width: 24rem) {
  .site-header nav a:nth-child(2) {
    display: none;
  }

  .hero__actions {
    align-items: stretch;
    flex-direction: column;
  }

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

  .proof-strip > p {
    grid-column: auto;
  }

  .proof-strip > * {
    border-right: 0;
    border-bottom: 0.08rem solid var(--line);
  }
}

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