@import url("./tokens.css");

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

html {
  scroll-padding-top: var(--header-offset);
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--paper);
  background-image: radial-gradient(var(--grid) 1px, transparent 1px);
  background-size: 22px 22px;
  color: var(--ink);
  font-family: var(--font-ui);
  font-weight: 400;
  font-size: var(--text-body);
  line-height: 1.6;
}

img,
svg {
  display: block;
}

a {
  color: var(--ink);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  text-decoration-color: var(--gilt);
}

a:hover {
  color: var(--oxblood);
}

:focus {
  outline: none;
}

:focus-visible {
  outline: var(--focus);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: var(--space-2);
  top: var(--space-2);
  z-index: 20;
  padding: 0.5rem 0.75rem;
  background: var(--iron);
  color: var(--paper);
  text-decoration: none;
  transform: translateY(-200%);
}

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

.masthead {
  position: sticky;
  top: 0;
  z-index: 8;
  background: var(--paper);
  border-bottom: 1px solid var(--hair);
}

.north-star-compact {
  background: var(--iron);
  color: var(--paper);
  border-top: 1px solid var(--ink);
}

.compact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 1.25rem;
  padding: 0.45rem 0;
}

.compact-tri,
.compact-eq,
.compact-benches {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.4;
}

.compact-eq {
  padding-bottom: 1px;
  border-bottom: 1px solid var(--gilt);
}

.compact-benches {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 0.75rem;
}

.compact-benches .mono {
  font-size: 0.72rem;
}


.compact-benches a,
.bench-list a {
  color: inherit;
  text-decoration: none;
}

.compact-benches a:hover,
.bench-list a:hover,
.compact-benches a:focus-visible,
.bench-list a:focus-visible {
  color: var(--gilt);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  text-decoration-color: var(--gilt);
}

.masthead-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-1) var(--space-3);
  max-width: 1180px;
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
}

.wordmark {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-wordmark);
  letter-spacing: 0.18em;
  line-height: 1.1;
}

.edition {
  margin: 0;
  color: var(--muted);
  font-size: var(--text-small);
  font-weight: 400;
}

.wrap {
  width: min(72rem, calc(100% - 2.5rem));
  margin: 0 auto;
}

.hero {
  padding: var(--space-5) 0 var(--space-3);
}

.kicker,
.north-kicker,
.panel-kicker {
  margin: 0 0 var(--space-1);
  color: var(--oxblood);
  font-family: var(--font-mono);
  font-size: var(--text-kicker);
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1,
.section-head h2,
.panel-head h2,
.coverage-title,
.appendix h2 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-ui);
  font-weight: 800;
  line-height: 1.15;
}

.hero h1 {
  font-size: var(--text-title);
  max-width: 28ch;
}

.lede {
  max-width: var(--measure);
  margin: 0;
  color: var(--muted);
}

.north-star {
  background: var(--iron);
  color: var(--paper);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.north-star .north-kicker {
  color: var(--gilt);
}

.north-star-grid {
  display: grid;
  grid-template-columns: minmax(9rem, 14rem) minmax(0, 1fr);
  gap: var(--space-3);
  padding: var(--space-3) 0;
  align-items: start;
}

.triangle {
  width: 8.5rem;
  height: auto;
  color: var(--gilt);
  margin: 0.15rem 0;
}

.triangle text {
  fill: var(--paper);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.04em;
}

.triangle-caption,
.north-note,
.spine-note,
.appendix-note {
  margin: 0;
  color: var(--hair);
  font-size: var(--text-small);
}

.triangle-caption {
  max-width: 22ch;
}

.equation {
  margin: 0 0 var(--space-1);
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--gilt);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  line-height: 1.45;
}

.north-note {
  max-width: 52ch;
}

.bench-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.bench-list li + li {
  margin-top: 0.25rem;
}

.leaders {
  margin: var(--space-4) auto;
  padding: var(--space-3);
  border: 1px solid var(--hair);
  background: var(--parchment);
}

.leaders .section-head {
  align-items: start;
}

.leaders .section-head h2 {
  max-width: 28ch;
}

.leaders-caption,
.leader-callout-caption {
  margin: 0;
  color: var(--muted);
  font-size: var(--text-small);
  max-width: 52ch;
}

.leader-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.leader-card {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(16rem, 0.95fr);
  gap: var(--space-3);
  padding: var(--space-3);
  border: 1px solid var(--hair);
  background: var(--paper);
}

.leader-measure h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-ui);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: none;
}

.leader-measure h3::after {
  display: none;
}

.leader-measure h4,
.leader-callout h4 {
  margin: var(--space-2) 0 0.35rem;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.leader-metric,
.leader-subhead {
  margin: 0 0 0.2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--text-small);
}

.leader-subhead {
  color: var(--muted);
}

.leader-measure p,
.leader-callout-measures {
  margin: 0;
  max-width: 58ch;
}

.leader-focus {
  grid-column: 1 / -1;
  justify-self: start;
  min-height: 44px;
  margin-top: 0;
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  font-weight: 800;
  font-size: 0.85rem;
  cursor: pointer;
}

.leader-focus:hover {
  background: var(--parchment);
}

.leader-ranks {
  margin: 0;
  padding: 0;
  list-style: none;
}

.leader-ranks li {
  display: grid;
  grid-template-columns: 2.1rem minmax(0, 1fr) auto;
  gap: 0.35rem 0.65rem;
  align-items: baseline;
  padding: 0.5rem 0;
  border-top: 1px solid var(--hair);
}

.leader-ranks li:first-child {
  border-top: 0;
  padding-top: 0;
}

.leader-mark {
  color: var(--oxblood);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.leader-model {
  font-family: var(--font-mono);
  font-size: var(--text-mono);
}

.leader-model-1 {
  font-weight: 800;
}

.leader-model-2,
.leader-model-3 {
  font-weight: 400;
}

.leader-score {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.1rem;
  font-family: var(--font-mono);
  font-size: var(--text-small);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.leader-cost {
  color: var(--muted);
  font-weight: 400;
}

.leader-cost-note {
  color: var(--oxblood);
}

.leader-callout {
  margin: var(--space-2) 0 var(--space-3);
  padding: var(--space-2);
  border: 1px solid var(--hair);
  background: var(--parchment);
}

.leader-callout .leader-ranks li {
  grid-template-columns: 2.1rem minmax(0, 1fr) auto;
}

.leader-callout-caption {
  margin-top: var(--space-2);
}

.coverage {
  margin: var(--space-4) auto;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--hair);
  background: var(--parchment);
}

.coverage-title {
  font-size: 1.05rem;
}

.coverage p {
  max-width: 78ch;
  margin: 0;
}

.coverage strong {
  font-weight: 800;
}

.course {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(20rem, 0.9fr);
  gap: var(--space-4);
  padding-bottom: var(--space-5);
  align-items: start;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.section-head p {
  margin: 0;
  color: var(--dim);
  font-size: var(--text-small);
  max-width: 42ch;
}

.map-shell {
  position: relative;
  border: 1px solid var(--hair);
  background: var(--paper);
  padding: var(--space-2);
}

.flow {
  position: relative;
  min-height: 0;
  padding: 0.35rem 0.15rem;
}

.flow-nodes {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.flow-edges {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: visible;
}

.band {
  display: grid;
  grid-template-columns: 6.4rem minmax(0, 1fr);
  gap: var(--space-1);
  align-items: stretch;
}

.band-label {
  margin: 0;
  padding-top: 0.7rem;
  color: var(--oxblood);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.band-nodes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8.6rem, 1fr));
  gap: var(--space-1);
}

.node {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  min-height: 44px;
  width: 100%;
  padding: 0;
  border: 1px solid var(--ink);
  background: var(--paper);
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.node:hover {
  background: var(--parchment);
}

.node[aria-current="step"],
.node.is-selected {
  background: var(--parchment);
  box-shadow: inset 0 -2px 0 var(--gilt);
}

.node-num {
  display: flex;
  align-items: center;
  justify-content: center;
  border-right: 1px solid var(--hair);
  color: var(--oxblood);
  font-family: var(--font-mono);
  font-weight: 400;
  font-variant-numeric: tabular-nums;
}

.node-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.15rem;
  min-width: 0;
  padding: 0.45rem 0.55rem;
}

.node-title {
  font-weight: 800;
  font-size: 0.86rem;
  line-height: 1.2;
}

.node-badge,
.meta-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-transform: lowercase;
  color: var(--oxblood);
}

.kbd-hint {
  margin: var(--space-2) 0 0;
  color: var(--dim);
  font-size: var(--text-small);
}

.kbd-hint kbd {
  padding: 0.05rem 0.3rem;
  border: 1px solid var(--hair);
  background: var(--iron);
  color: var(--hair);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.spine {
  margin: var(--space-3) 0 0;
  padding: var(--space-2);
  background: var(--iron);
  color: var(--paper);
}

.spine h3 {
  margin: 0 0 0.35rem;
  font-size: 0.85rem;
  font-weight: 800;
}

.spine-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.7rem;
  margin: var(--space-2) 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--text-small);
}

.spine-steps li {
  position: relative;
  padding-right: 0.9rem;
}

.spine-steps li:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: 0;
  color: var(--gilt);
}

.out-of-scope {
  margin: var(--space-3) 0 0;
  padding-top: var(--space-2);
  border-top: 1px solid var(--hair);
  color: var(--muted);
  font-size: var(--text-small);
}

.detail {
  position: sticky;
  top: var(--header-offset);
  max-height: calc(100vh - var(--header-offset));
  overflow: auto;
  border: 1px solid var(--hair);
  background: var(--paper);
  padding: var(--space-3);
}

.panel-head {
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--hair);
}

.where {
  margin: 0;
  color: var(--dim);
  font-size: var(--text-small);
}

.meta-badge {
  margin: 0.45rem 0 0;
}

.panel {
  display: none;
}

.panel.is-active:not([hidden]) {
  display: block;
}

.panel h3,
.appendix-panel h3 {
  margin: var(--space-3) 0 var(--space-1);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.panel h3::after,
.appendix-panel h3::after {
  content: "";
  display: block;
  width: 2rem;
  height: 1px;
  margin-top: 0.35rem;
  background: var(--oxblood);
}

.panel .thesis,
.panel .takeaway,
.panel .evidence {
  margin: 0;
}

.panel .takeaway {
  font-weight: 800;
}

.panel ul,
.appendix-panel ul {
  margin: 0;
  padding-left: 1.1rem;
}

.panel li + li,
.appendix-panel li + li {
  margin-top: 0.4rem;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0;
}

.chip {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border: 1px solid var(--hair);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.35;
}

.mono {
  font-family: var(--font-mono);
  font-size: var(--text-mono);
}

.panel-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-top: var(--space-3);
  padding-top: var(--space-2);
  border-top: 1px solid var(--hair);
}

.panel-nav button,
.appendix-tabs button {
  min-height: 44px;
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  font-weight: 800;
  font-size: 0.85rem;
  cursor: pointer;
}

.panel-nav button:hover:not(:disabled),
.appendix-tabs button:hover {
  background: var(--parchment);
}

.panel-nav button:disabled {
  border-color: var(--hair);
  color: var(--dim);
  cursor: not-allowed;
}

.appendix {
  padding-bottom: var(--space-5);
}

.appendix-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-bottom: var(--space-2);
}

.appendix-tabs button[aria-selected="true"] {
  box-shadow: inset 0 -2px 0 var(--gilt);
  background: var(--parchment);
}

.appendix-panel {
  display: none;
  border: 1px solid var(--hair);
  background: var(--paper);
  padding: var(--space-3);
}

.appendix-panel.is-active:not([hidden]) {
  display: block;
}

.appendix-note {
  color: var(--dim);
  margin-bottom: var(--space-2);
}

.site-foot {
  border-top: 1px solid var(--hair);
  padding: var(--space-3) 0 var(--space-5);
  color: var(--dim);
  font-size: var(--text-small);
}

.site-foot p {
  max-width: var(--measure);
  margin: 0 0 0.6rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 960px) {
  .north-star-grid {
    grid-template-columns: 1fr;
  }

  .leader-card {
    grid-template-columns: 1fr;
  }

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

  .detail {
    position: static;
    max-height: none;
  }
}

@media (max-width: 640px) {
  .wrap {
    width: calc(100% - 2rem);
  }

  .band {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .band-label {
    position: sticky;
    top: var(--header-offset);
    z-index: 3;
    padding: 0.35rem 0;
    background: var(--paper);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}