@import url("../../assets/fonts/fonts.css");

:root {
  color-scheme: dark;
  --paper: #070706;
  --paper-raised: #0d0c0a;
  --ink: #e8e1d4;
  --ink-soft: #b9b1a4;
  --muted: #a39b8e;
  --faint: #80796e;
  --line: rgba(232, 225, 212, 0.11);
  --line-strong: rgba(232, 225, 212, 0.2);
  --cream: #d0b987;
  --clay: #c47a52;
  --market: #c47a52;
  --target: #61a39e;
  --positive: #9da887;
  --negative: #bd7061;
  --session-pre: #9a7f72;
  --session-market: #c47a52;
  --session-post: #a85f4b;
  --serif: "Newsreader", Georgia, serif;
  --prose: "Source Serif 4", Georgia, serif;
  --sans: "IBM Plex Sans", sans-serif;
  --mono: "IBM Plex Mono", monospace;
  --text-micro: 0.625rem;
  --text-label: 0.6875rem;
  --text-ui: 0.75rem;
  --text-data: 0.8125rem;
  --text-support: 0.875rem;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --container: 1180px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --response-fast: 120ms;
  --response-medium: 280ms;
  --response-slow: 520ms;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.5;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

button {
  color: inherit;
  font: inherit;
}

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

:focus-visible {
  outline: 2px solid var(--cream);
  outline-offset: 4px;
}

::selection {
  background: var(--cream);
  color: var(--paper);
}

.skip-link {
  position: fixed;
  top: var(--space-4);
  left: var(--space-4);
  z-index: 100;
  padding: 0.7rem 0.9rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: var(--text-ui);
  transform: translateY(-180%);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid transparent;
  transition: background-color 180ms var(--ease), border-color 180ms var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(7, 7, 6, 0.76);
  backdrop-filter: blur(18px) saturate(1.15);
}

.header-inner,
.section-shell,
.site-footer {
  width: min(calc(100% - 3rem), var(--container));
  margin-inline: auto;
}

.header-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  min-height: 4.5rem;
  font-family: var(--mono);
  font-size: var(--text-ui);
}

.brand {
  display: inline-flex;
  align-items: center;
  width: fit-content;
}

.brand-name {
  font-family: var(--serif);
  font-size: 1.18rem;
  font-weight: 500;
}

.site-nav {
  display: flex;
  gap: 1.6rem;
  justify-self: end;
  color: var(--muted);
}

.site-nav a {
  position: relative;
  padding-block: var(--space-2);
  transition: color 160ms ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0.22rem;
  left: 0;
  height: 1px;
  background: var(--ink-soft);
  opacity: 0;
  transform: scaleX(0.3);
  transition: opacity 160ms ease, transform 180ms var(--ease);
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a.is-current,
.site-nav a[aria-current] {
  color: var(--ink);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after,
.site-nav a.is-current::after,
.site-nav a[aria-current]::after {
  opacity: 1;
  transform: scaleX(1);
}

.header-place {
  justify-self: end;
  color: var(--faint);
  text-transform: uppercase;
}

.section-shell {
  scroll-margin-top: 5.5rem;
}

.opening {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(17rem, 0.42fr);
  column-gap: clamp(3rem, 9vw, 8.5rem);
  align-content: center;
  min-height: calc(100vh - 4.5rem);
  padding-block: clamp(4rem, 9vh, 7rem) 2.8rem;
}

.opening > * {
  min-width: 0;
}

.opening-copy {
  align-self: end;
}

.eyebrow,
.micro-label,
.article-state,
.model-symbol,
.model-target,
.model-live,
.model-facts,
.range-control,
.chart-data-state,
.chart-foot,
.chart-credit,
.source-note,
.market-clock,
.tool-state,
.site-footer {
  font-family: var(--mono);
}

.eyebrow,
.micro-label,
.article-state {
  color: var(--muted);
  font-size: var(--text-label);
  letter-spacing: 0.075em;
  text-transform: uppercase;
}

.eyebrow {
  margin: 0 0 1.4rem;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  text-wrap: balance;
}

h1 {
  max-width: 11ch;
  margin-bottom: 1.6rem;
  font-family: var(--serif);
  font-size: clamp(3.8rem, 7.9vw, 7.7rem);
  font-weight: 400;
  letter-spacing: -0.052em;
  line-height: 0.86;
}

.opening-note {
  max-width: 40rem;
  margin-bottom: 0;
  color: var(--ink-soft);
  font-family: var(--prose);
  font-size: clamp(1.05rem, 1.8vw, 1.3rem);
}

.now-note {
  align-self: end;
  margin-bottom: 0.35rem;
  border-top: 1px solid var(--line-strong);
}

.now-note .micro-label {
  margin: 0;
  padding: 0.9rem 0 1.4rem;
}

.now-note p:not(.micro-label) {
  margin: 0;
  padding: 0.35rem 0;
  color: var(--ink-soft);
  font-family: var(--prose);
  font-size: 0.98rem;
}

.watchlist {
  grid-column: 1 / -1;
  align-self: end;
  margin-top: clamp(4rem, 10vh, 7.5rem);
  width: 100%;
  min-width: 0;
}

.watch-head {
  display: grid;
  grid-template-columns: auto minmax(2rem, 1fr) auto;
  gap: clamp(1.25rem, 3vw, 2.5rem);
  align-items: center;
  padding: 0.5rem 0 0.85rem;
}

.watch-head::before {
  content: "";
  grid-column: 2;
  grid-row: 1;
  height: 1px;
  background: var(--line-strong);
}

.watch-head h2 {
  grid-column: 1;
  grid-row: 1;
  margin: 0;
  font-family: var(--serif);
  font-size: 1.95rem;
  font-weight: 500;
}

.watch-actions {
  grid-column: 3;
  grid-row: 1;
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.market-clock {
  color: var(--faint);
  font-size: var(--text-data);
}

.watch-toggle {
  min-height: 2.75rem;
  border: 0;
  border-bottom: 1px solid transparent;
  padding: 0.35rem 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-family: var(--mono);
  font-size: var(--text-data);
  transition: color 160ms ease, border-color 160ms ease;
}

.watch-toggle:hover,
.watch-toggle:focus-visible,
.watch-toggle[aria-expanded="true"] {
  border-color: var(--line-strong);
  color: var(--ink);
}

.watch-window {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 1.25rem, #000 calc(100% - 1.25rem), transparent);
  mask-image: linear-gradient(90deg, transparent, #000 1.25rem, #000 calc(100% - 1.25rem), transparent);
}

.watch-grid {
  display: flex;
  width: max-content;
  min-width: 200%;
  will-change: transform;
  animation: watch-roll 300s linear infinite;
}

.watch-window:hover .watch-grid,
.watch-window:focus-within .watch-grid {
  animation-play-state: paused;
}

@keyframes watch-roll {
  to {
    transform: translateX(-50%);
  }
}

.watch-item {
  display: inline-flex;
  align-items: baseline;
  gap: 0.62rem;
  min-width: 0;
  border: 0;
  padding: 0.8rem 1.65rem 0.95rem;
  background: transparent;
  color: var(--muted);
  cursor: default;
  font-family: var(--mono);
  text-align: left;
  white-space: nowrap;
  opacity: 1;
  transition: color var(--response-fast) ease, opacity var(--response-medium) ease, transform var(--response-fast) var(--ease);
}

.watch-grid.is-engaged .watch-item {
  opacity: 0.4;
}

.watch-grid.is-engaged .watch-item.is-hovered,
.watch-grid.is-engaged .watch-item:focus-visible {
  opacity: 1;
}

button.watch-item {
  position: relative;
  cursor: pointer;
}

button.watch-item::after {
  content: "";
  position: absolute;
  right: 1.65rem;
  bottom: 0.48rem;
  left: 1.65rem;
  height: 1px;
  background: var(--ink-soft);
  opacity: 0.38;
  transform: scaleX(0.12);
  transform-origin: left center;
  transition: opacity var(--response-fast) ease, transform var(--response-medium) var(--ease);
}

button.watch-item .watch-item-symbol {
  color: var(--cream);
}

button.watch-item:hover,
button.watch-item:focus-visible {
  color: var(--ink);
  transform: translateY(-1px);
}

button.watch-item:hover::after,
button.watch-item:focus-visible::after,
button.watch-item.is-hovered::after {
  opacity: 0.9;
  transform: scaleX(1);
}

button.watch-item.is-activating {
  transform: translateY(1px);
}

button.watch-item.is-activating::after {
  opacity: 0;
  transform: translateY(0.35rem) scaleX(0.18);
}

.watch-item-symbol {
  color: var(--ink);
  font-size: 0.94rem;
  font-weight: 500;
}

.watch-item-price {
  color: var(--market);
  font-size: 0.94rem;
}

.watch-item-change {
  font-size: var(--text-data);
}

.watch-item.is-up .watch-item-change {
  color: var(--positive);
}

.watch-item.is-down .watch-item-change {
  color: var(--negative);
}

.watch-details {
  display: none;
  grid-column: 1 / -1;
  gap: 0.7rem;
  color: var(--faint);
  font-size: var(--text-ui);
  white-space: nowrap;
}

.watchlist.is-expanded .watch-item {
  display: grid;
  grid-template-columns: auto auto auto;
  gap: 0.28rem 0.62rem;
}

.watchlist.is-expanded .watch-details {
  display: inline-flex;
}

.source-note {
  display: none;
  margin: 0;
  padding: 0.45rem 0 0.2rem;
  color: var(--faint);
  font-size: var(--text-micro);
}

.watchlist.is-expanded .source-note {
  display: block;
}

.content-section {
  padding-block: clamp(6rem, 11vw, 10rem);
}

.section-intro {
  max-width: none;
  margin-bottom: clamp(3rem, 6vw, 5.5rem);
}

.section-intro > div {
  display: grid;
  grid-template-columns: auto minmax(2rem, 1fr);
  column-gap: clamp(1.25rem, 3vw, 2.5rem);
  align-items: center;
}

.section-intro > div::after {
  content: "";
  grid-column: 2;
  grid-row: 1;
  height: 1px;
  background: var(--line-strong);
}

.section-intro h2,
.contact-section h2 {
  margin-bottom: 0.7rem;
  font-family: var(--serif);
  font-size: clamp(3rem, 6vw, 6rem);
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 0.88;
}

.section-intro h2 {
  grid-column: 1;
  grid-row: 1;
  margin-bottom: 0;
}

.section-intro h2 a {
  transition: color 140ms ease;
}

.section-intro h2 a:hover,
.section-intro h2 a:focus-visible {
  color: var(--cream);
}

.section-intro p:last-child,
.contact-section > div > p:last-child {
  grid-column: 1 / -1;
  grid-row: 2;
  max-width: 38rem;
  margin: 1rem 0 0;
  color: var(--muted);
  font-family: var(--prose);
  font-size: 1.08rem;
}

.article-shelves {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 7vw, 6.5rem);
}

.shelf-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0 0 1.4rem;
}

.shelf-head h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.65rem;
  font-weight: 500;
}

.article-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
  min-height: 7.7rem;
  padding: var(--space-4) 0;
  transition: color var(--response-fast) ease;
}

a.article-row:hover h4,
a.article-row:focus-visible h4 {
  color: var(--cream);
}

.article-state {
  display: block;
  margin-bottom: 0.6rem;
}

.article-row.is-current .article-state {
  color: var(--clay);
}

.article-row h4 {
  max-width: 22ch;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.35rem, 2.3vw, 2rem);
  font-weight: 400;
  line-height: 1.05;
  transition: color var(--response-fast) ease;
}

.article-excerpt {
  max-width: 33rem;
  max-height: 0;
  margin: 0;
  overflow: hidden;
  color: var(--muted);
  font-family: var(--prose);
  font-size: 0.9rem;
  line-height: 1.45;
  opacity: 0;
  transform: translateY(0.35rem);
  transition: max-height var(--response-slow) var(--ease), margin-top var(--response-medium) var(--ease), opacity var(--response-medium) ease, transform var(--response-slow) var(--ease);
}

.article-row:hover .article-excerpt,
.article-row:focus-within .article-excerpt {
  max-height: 4rem;
  margin-top: 0.75rem;
  opacity: 1;
  transform: translateY(0);
}

@media (hover: none) {
  .article-row.is-current .article-excerpt {
    max-height: 4rem;
    margin-top: 0.75rem;
    opacity: 1;
    transform: translateY(0);
  }
}

.models-section {
  padding-bottom: clamp(7rem, 12vw, 11rem);
}

.models-intro {
  max-width: none;
}

.model-workbench {
  display: grid;
  grid-template-columns: minmax(16.5rem, 0.34fr) minmax(0, 1fr);
}

.model-list {
  border-right: 1px solid var(--line);
}

.model-option {
  position: relative;
  display: grid;
  grid-template-columns: 3.6rem minmax(0, 1fr) auto;
  gap: 0.35rem 0.8rem;
  align-items: baseline;
  width: 100%;
  min-height: 5.6rem;
  border: 0;
  padding: 1rem 1.25rem 1rem 0;
  background: transparent;
  cursor: pointer;
  text-align: left;
  transition: padding-left 200ms var(--ease), background-color 160ms ease;
}

.model-option:last-child {
  border-bottom: 0;
}

.model-option::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 2px;
  background: var(--ink-soft);
  opacity: 0;
  transform: scaleY(0.2);
  transition: opacity 160ms ease, transform 220ms var(--ease);
}

.model-option:hover,
.model-option.is-active {
  padding-left: 1rem;
  background: linear-gradient(90deg, rgba(232, 225, 212, 0.045), transparent 72%);
}

.model-option.is-active::before {
  opacity: 1;
  transform: scaleY(1);
}

.model-option.is-arriving {
  animation: model-arrival 700ms var(--ease) both;
}

@keyframes model-arrival {
  0% { background-color: rgba(232, 225, 212, 0.1); }
  100% { background-color: transparent; }
}

.model-symbol {
  color: var(--cream);
  font-size: var(--text-label);
}

.model-name {
  overflow: hidden;
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 1.08rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.model-target {
  color: var(--target);
  font-size: var(--text-label);
}

.model-live {
  grid-column: 2 / -1;
  color: var(--market);
  font-size: var(--text-micro);
}

.model-panel {
  min-width: 0;
  padding: clamp(1.25rem, 3vw, 2.3rem);
  background: rgba(255, 255, 255, 0.008);
}

.model-panel-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-8);
  min-height: 8.8rem;
}

.model-copy .micro-label {
  margin: 0 0 0.75rem;
  color: var(--ink-soft);
}

.model-copy {
  transition: opacity var(--response-medium) ease, transform var(--response-slow) var(--ease);
}

.model-copy.is-changing {
  opacity: 0.34;
  transform: translateY(0.25rem);
}

.model-copy h3 {
  margin: 0 0 0.55rem;
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 3.6rem);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 0.94;
}

.model-copy p:last-child {
  max-width: 37rem;
  margin-bottom: 0;
  color: var(--muted);
  font-family: var(--prose);
}

.model-facts {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: var(--space-6);
  align-content: start;
  margin: 0;
}

.model-summary {
  display: grid;
  gap: var(--space-4);
  align-content: start;
  justify-items: end;
}

.model-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.4rem 1.1rem;
  font-family: var(--mono);
  font-size: var(--text-label);
}

.model-actions a {
  display: inline-flex;
  gap: 0.45rem;
  align-items: center;
  min-height: 2.25rem;
  border-bottom: 1px solid var(--line-strong);
  color: var(--ink-soft);
  transition: border-color var(--response-fast) ease, color var(--response-fast) ease;
}

.model-actions a:last-child {
  color: var(--muted);
}

.model-actions a:hover,
.model-actions a:focus-visible {
  border-color: var(--ink-soft);
  color: var(--ink);
}

#chart-price {
  color: var(--market);
}

#chart-target {
  color: var(--target);
}

.model-facts div {
  min-width: 5rem;
}

.model-facts dt {
  margin-bottom: 0.35rem;
  color: var(--faint);
  font-size: var(--text-micro);
  text-transform: uppercase;
}

.model-facts dd {
  margin: 0;
  color: var(--ink-soft);
  font-size: var(--text-data);
}

.model-facts dd.is-positive {
  color: var(--positive);
}

.model-facts dd.is-negative {
  color: var(--negative);
}

.chart-toolbar {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  align-items: center;
  margin-top: 1.1rem;
  padding-top: 0.35rem;
}

.session-key {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding: 0.55rem 1.25rem 0;
  color: var(--faint);
  font-family: var(--mono);
  font-size: var(--text-micro);
}

.session-key[hidden] {
  display: none;
}

.session-key span {
  display: inline-flex;
  gap: 0.4rem;
  align-items: center;
}

.session-key i {
  display: block;
  width: 1rem;
  height: 2px;
  background: var(--ink-soft);
}

.session-key .is-pre {
  background: var(--session-pre);
}

.session-key .is-market {
  background: var(--session-market);
}

.session-key .is-post {
  background: var(--session-post);
}

.range-control {
  display: flex;
  gap: var(--space-1);
}

.range-control button {
  min-width: 2.55rem;
  min-height: 1.9rem;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.28rem 0.55rem;
  background: transparent;
  color: var(--faint);
  cursor: pointer;
  font-size: var(--text-label);
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.range-control button:hover {
  color: var(--ink);
}

.range-control button.is-active {
  border-color: var(--line-strong);
  background: rgba(236, 230, 217, 0.045);
  color: var(--ink);
}

.chart-data-state {
  color: var(--faint);
  font-size: var(--text-micro);
}

.chart-stage {
  position: relative;
  min-height: 25rem;
  margin-top: 0.6rem;
  overflow: hidden;
  cursor: crosshair;
}

#model-chart {
  display: block;
  width: 100%;
  height: 25rem;
}

.chart-tooltip {
  position: absolute;
  z-index: 3;
  display: grid;
  gap: 0.08rem;
  min-width: 6.4rem;
  border: 1px solid var(--line-strong);
  border-radius: 0.45rem;
  padding: 0.42rem 0.55rem;
  background: rgba(7, 7, 6, 0.86);
  box-shadow: 0 0.8rem 2rem rgba(0, 0, 0, 0.26);
  backdrop-filter: blur(12px);
  pointer-events: none;
  transform: translate(0.75rem, -50%);
  transition: left 70ms linear, top 70ms linear;
}

.chart-tooltip strong,
.chart-tooltip span {
  font-family: var(--mono);
  font-weight: 400;
}

.chart-tooltip strong {
  color: var(--ink);
  font-size: var(--text-ui);
}

.chart-tooltip span {
  color: var(--muted);
  font-size: var(--text-micro);
}

.chart-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--faint);
  font-family: var(--mono);
  font-size: var(--text-label);
}

.chart-empty[hidden],
.chart-tooltip[hidden] {
  display: none !important;
}

.chart-foot {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding-top: 0.85rem;
  color: var(--faint);
  font-size: var(--text-micro);
}

.chart-foot div {
  display: flex;
  gap: var(--space-4);
}

.chart-foot a {
  color: var(--ink-soft);
  transition: color 160ms ease;
}

.chart-foot a:hover {
  color: var(--ink);
}

.chart-credit {
  margin: 1.35rem 0 0;
  color: var(--faint);
  font-size: var(--text-micro);
}

.chart-credit a {
  color: var(--muted);
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 0.2rem;
}

.tools-section {
  width: min(calc(100% - 3rem), var(--container));
  padding-bottom: clamp(6rem, 10vw, 9rem);
}

.tools-section .section-intro h2 {
  font-size: clamp(2.8rem, 5vw, 4.8rem);
}

.tool-list {
  display: grid;
  gap: clamp(1rem, 3vw, 2rem);
}

.tool-row {
  display: grid;
  grid-template-columns: minmax(16rem, 0.8fr) minmax(14rem, 1fr) 9rem;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  padding: 0.8rem 0;
}

.tool-row .micro-label {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--muted);
}

.tool-row h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.55rem;
  font-weight: 400;
  transition: color var(--response-fast) ease;
}

.tool-row h3 a {
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--cream) 62%, transparent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

.tool-row h3 a::after {
  content: " ↗";
  color: var(--cream);
  font-family: var(--mono);
  font-size: 0.62em;
}

.tool-row p {
  margin: 0;
  color: var(--muted);
  font-family: var(--prose);
}

.tool-state {
  justify-self: end;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.4rem 0.65rem;
  color: var(--faint);
  font-size: var(--text-micro);
  white-space: nowrap;
}

.tool-row h3 a:hover,
.tool-row h3 a:focus-visible,
.tool-row p a:hover,
.tool-row p a:focus-visible {
  color: var(--cream);
  text-decoration-color: var(--cream);
}

.tool-row p a {
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 0.2rem;
}

.contact-section {
  width: min(calc(100% - 3rem), var(--container));
  display: grid;
  grid-template-columns: auto minmax(2rem, 1fr) auto;
  gap: clamp(1.25rem, 3vw, 2.5rem);
  align-items: center;
  padding-block: clamp(6rem, 11vw, 10rem);
}

.contact-section::before {
  content: "";
  grid-column: 2;
  grid-row: 1;
  height: 1px;
  background: var(--line-strong);
}

.contact-section > div {
  display: contents;
}

.contact-section h2 {
  grid-column: 1;
  grid-row: 1;
  margin: 0;
  font-size: clamp(2.8rem, 5vw, 4.8rem);
}

.contact-section .micro-label {
  margin-bottom: var(--space-4);
}

.contact-link {
  grid-column: 3;
  grid-row: 1;
  display: inline-flex;
  gap: 1.3rem;
  align-items: center;
  margin: 0;
  border-bottom: 1px solid var(--line-strong);
  padding: 0.6rem 0;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: var(--text-ui);
  transition: color 160ms ease, border-color 160ms ease;
}

.contact-link:hover {
  border-color: var(--ink-soft);
  color: var(--ink);
}

/* Compatibility for the separate contact route while it shares this system. */
.brand-line {
  margin-left: var(--space-3);
  color: var(--faint);
  font-family: var(--mono);
  font-size: var(--text-micro);
}

.section-heading {
  max-width: 46rem;
  padding-top: clamp(7rem, 14vw, 11rem);
  padding-bottom: clamp(3rem, 7vw, 5rem);
}

.section-heading h1 {
  margin: 0 0 1rem;
  font-family: var(--serif);
  font-size: clamp(4rem, 10vw, 8rem);
  font-weight: 400;
  letter-spacing: -0.055em;
  line-height: 0.86;
}

.section-heading p:last-child {
  max-width: 42rem;
  color: var(--ink-soft);
  font-family: var(--prose);
  font-size: 1.08rem;
  line-height: 1.7;
}

.contact-fingerprint {
  color: var(--muted);
}

.section-heading a {
  color: var(--cream);
}

.section-kicker {
  margin: 0 0 1.2rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: var(--text-label);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.archive-list {
  border-top: 1px solid var(--line-strong);
}

.archive-list a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-6);
  align-items: center;
  min-height: 4rem;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  transition: color 160ms ease, padding-left 160ms var(--ease);
}

.archive-list a:hover {
  padding-left: 0.35rem;
  color: var(--ink);
}

.row-title {
  font-family: var(--prose);
  font-size: 1.05rem;
}

.row-meta {
  color: var(--faint);
  font-family: var(--mono);
  font-size: var(--text-label);
}

.contact-icon {
  display: block;
  opacity: 0.7;
  filter: invert(88%) sepia(8%) saturate(258%) hue-rotate(353deg) brightness(92%);
}

.contact-command {
  margin: 2rem 0 0;
  overflow-x: auto;
  border: 1px solid var(--line);
  padding: 1rem 1.2rem;
  background: var(--paper-raised);
  color: var(--muted);
  font-family: var(--mono);
  font-size: var(--text-label);
}

.contact-fingerprint {
  margin: 1rem 0 clamp(6rem, 12vw, 10rem);
  font-family: var(--mono);
  font-size: var(--text-label);
}

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

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: var(--space-8);
  padding: 1.4rem 0 6rem;
  color: var(--faint);
  font-size: var(--text-micro);
}

.site-footer p {
  margin: 0;
}

.radio-widget {
  position: fixed;
  right: var(--space-4);
  bottom: var(--space-4);
  z-index: 30;
  display: flex;
  align-items: center;
  min-height: 2.35rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: var(--space-1);
  background: rgba(7, 7, 6, 0.62);
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.035), 0 1rem 2.8rem rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(16px) saturate(1.1);
}

.radio-widget button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-width: 1.85rem;
  min-height: 1.85rem;
  border: 0;
  border-radius: 999px;
  padding: 0 0.55rem;
  background: transparent;
  cursor: pointer;
  font-family: var(--mono);
  font-size: var(--text-micro);
}

.radio-icon {
  display: block;
  width: 0;
  height: 0;
  border-top: 0.24rem solid transparent;
  border-bottom: 0.24rem solid transparent;
  border-left: 0.38rem solid var(--ink-soft);
}

.radio-widget.is-playing .radio-icon {
  width: 0.42rem;
  height: 0.48rem;
  border: 0;
  border-right: 0.12rem solid var(--cream);
  border-left: 0.12rem solid var(--cream);
}

.radio-widget > span {
  max-width: 0;
  overflow: hidden;
  color: var(--muted);
  font-family: var(--mono);
  font-size: var(--text-micro);
  opacity: 0;
  white-space: nowrap;
  transition: max-width 260ms var(--ease), opacity 160ms ease, margin 260ms var(--ease);
}

.radio-widget:hover > span,
.radio-widget:focus-within > span,
.radio-widget.is-playing > span {
  max-width: 8rem;
  margin-right: 0.55rem;
  opacity: 1;
}

@media (max-width: 980px) {
  .opening {
    grid-template-columns: minmax(0, 1fr) minmax(15rem, 0.48fr);
    column-gap: 3rem;
  }

  .model-workbench {
    grid-template-columns: 14.5rem minmax(0, 1fr);
  }

  .model-panel-head {
    grid-template-columns: 1fr;
    gap: 1.4rem;
  }

  .model-facts {
    justify-content: start;
  }

  .model-summary {
    justify-items: start;
  }

  .model-actions {
    justify-content: flex-start;
  }

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

  .tool-state {
    grid-column: 2;
    justify-self: start;
  }
}

@media (max-width: 760px) {
  .header-inner,
  .section-shell,
  .site-footer {
    width: min(calc(100% - 2rem), var(--container));
  }

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

  .header-place {
    display: none;
  }

  .site-nav {
    gap: 0.9rem;
    font-size: var(--text-label);
  }

  .brand,
  .site-nav a {
    min-height: 2.75rem;
  }

  .site-nav a {
    display: inline-flex;
    align-items: center;
    padding-block: 0;
    white-space: nowrap;
  }

  .opening {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 5.5rem;
  }

  .opening-copy {
    align-self: start;
  }

  .now-note {
    margin-top: 3.5rem;
  }

  .watchlist {
    grid-column: 1;
    margin-top: 3.5rem;
  }

  .watch-item {
    width: 17rem;
    min-width: 17rem;
    padding-inline: 1rem;
  }

  .watchlist.is-expanded .watch-details {
    color: var(--muted);
    font-size: var(--text-ui);
    line-height: 1.5;
  }

  .watchlist.is-expanded .source-note {
    padding-top: 0.75rem;
    color: var(--muted);
    font-size: var(--text-ui);
    line-height: 1.5;
  }

  .article-shelves {
    grid-template-columns: 1fr;
  }

  .model-workbench {
    grid-template-columns: 1fr;
  }

  .model-actions a {
    min-height: 2.75rem;
  }

  .model-list {
    display: flex;
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding-bottom: 0.7rem;
    scroll-snap-type: x mandatory;
    scroll-padding-inline: 0;
    overscroll-behavior-inline: contain;
    scrollbar-width: none;
  }

  .model-list::-webkit-scrollbar {
    display: none;
  }

  .model-option {
    flex: 0 0 min(20rem, calc(100vw - 4rem));
    border-right: 1px solid var(--line);
    border-bottom: 0;
    padding-left: 0.9rem;
    scroll-snap-align: start;
    scroll-snap-stop: always;
  }

  .model-option:hover,
  .model-option.is-active {
    padding-left: 0.9rem;
  }

  .model-option::before {
    top: auto;
    right: 0;
    bottom: 0;
    width: auto;
    height: 2px;
    transform: scaleX(0.2);
  }

  .model-option.is-active::before {
    transform: scaleX(1);
  }

  .chart-stage,
  #model-chart {
    min-height: 21rem;
    height: 21rem;
  }

  .contact-section {
    grid-template-columns: auto minmax(1rem, 1fr) auto;
  }

  .contact-link {
    justify-self: start;
    min-height: 2.75rem;
    margin-top: 0;
    padding-block: 0;
  }

  .tool-row h3 a {
    display: inline-flex;
    align-items: center;
    min-height: 2.75rem;
  }

  .site-footer {
    padding-bottom: 1rem;
  }

  .radio-widget {
    position: static;
    z-index: auto;
    justify-content: flex-end;
    width: min(calc(100% - 2rem), var(--container));
    margin: 0 auto 2rem;
    border: 0;
    border-radius: 0;
    padding: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
  }

  .radio-widget button {
    min-width: 2.75rem;
    min-height: 2.75rem;
    border: 1px solid var(--line-strong);
  }

  .radio-widget > span {
    order: -1;
    max-width: 8rem;
    margin-right: 0.75rem;
    opacity: 1;
  }
}

@media (max-width: 540px) {
  .header-inner {
    grid-template-columns: minmax(0, 1fr);
    min-height: 5.5rem;
  }

  .brand-name {
    font-size: 1rem;
  }

  .site-nav {
    justify-content: space-between;
    justify-self: stretch;
    width: 100%;
    gap: 0;
    font-size: var(--text-ui);
  }

  .site-nav a:nth-child(3) {
    display: inline-flex;
  }

  h1 {
    font-size: clamp(3.45rem, 17vw, 5.3rem);
  }

  .watch-head {
    align-items: center;
  }

  .market-clock {
    display: none;
  }

  .article-row {
    min-height: 7rem;
  }

  .model-panel {
    padding-inline: 0;
  }

  .model-panel-head,
  .chart-toolbar,
  .chart-foot,
  .chart-credit {
    margin-inline: 1rem;
  }

  .model-facts {
    gap: 0.9rem;
  }

  .model-facts div {
    min-width: 0;
  }

  .chart-toolbar {
    align-items: flex-start;
  }

  .range-control {
    gap: 0;
  }

  .range-control button {
    min-width: 2.25rem;
  }

  .chart-data-state {
    max-width: 7rem;
    text-align: right;
  }

  .tool-row {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .tool-state {
    grid-column: 1;
  }

  .site-footer {
    display: grid;
  }

  .contact-section {
    grid-template-columns: auto minmax(0.25rem, 1fr) auto;
    gap: 0.5rem;
  }

  .contact-link {
    grid-column: 3;
    grid-row: 1;
    gap: 0.75rem;
    margin-top: 0;
  }
}

/* Main index: the horizontal header and marginal rail are two states of one navigation. */
.index-page .site-header {
  position: relative;
  width: 100%;
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity 180ms ease,
    transform 260ms var(--ease),
    background-color 180ms var(--ease),
    border-color 180ms var(--ease);
}

.index-page .site-header.is-transformed {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-0.5rem);
}

.index-page .site-header.is-compact {
  position: sticky;
  top: 0;
  visibility: visible;
  border-bottom-color: var(--line);
  background: rgba(7, 7, 6, 0.9);
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
  backdrop-filter: blur(18px) saturate(1.15);
}

.index-page .site-header.is-compact .header-inner {
  min-height: 3.75rem;
}

.section-rail {
  --rail-reveal: 0;
  position: fixed;
  top: 29vh;
  left: 1.2rem;
  z-index: 19;
  display: grid;
  grid-template-columns: minmax(5.3rem, auto) 1px;
  gap: var(--space-3);
  align-items: center;
  min-width: 6.4rem;
  visibility: hidden;
  color: var(--muted);
  font-family: var(--mono);
  font-size: var(--text-ui);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease, visibility 0s linear 180ms;
}

.section-rail.is-active {
  visibility: visible;
  opacity: 1;
  transition-delay: 0s;
}

.section-rail.is-handoff {
  --rail-reveal: 1;
}

.section-rail-line {
  grid-column: 2;
  grid-row: 1;
  width: 1px;
  height: calc(3.4rem + (5.4rem * var(--rail-reveal)));
  justify-self: center;
  background: var(--ink-soft);
  opacity: calc(0.15 + (0.22 * var(--rail-reveal)));
  transition: height 360ms var(--ease), opacity 220ms ease;
}

.section-rail.is-awake .section-rail-line {
  opacity: calc(0.25 + (0.22 * var(--rail-reveal)));
}

.section-rail-nav {
  grid-column: 1;
  grid-row: 1;
  display: grid;
  gap: 0.18rem;
  justify-items: end;
  min-width: 0;
  text-align: right;
}

.section-rail-nav a {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 1.82rem;
  width: fit-content;
  padding-inline: 0 0.2rem;
  color: var(--ink-soft);
  opacity: var(--rail-reveal);
  pointer-events: none;
  transition:
    color var(--response-fast) ease,
    opacity 280ms ease;
}

.section-rail-nav a::after {
  content: "";
  position: absolute;
  right: 0.2rem;
  bottom: 0.2rem;
  left: 0;
  height: 1px;
  background: var(--ink-soft);
  opacity: 0;
  transform: scaleX(0.3);
  transform-origin: right center;
  transition: opacity var(--response-fast) ease, transform 180ms var(--ease);
}

.section-rail-nav a.is-current {
  margin-right: var(--space-1);
  color: var(--ink);
  opacity: var(--rail-reveal);
}

.section-rail-nav a.is-leaving {
  opacity: 0;
}

.section-rail.is-revealed .section-rail-nav a.is-leaving,
.section-rail.is-handoff .section-rail-nav a.is-leaving,
.section-rail:focus-within .section-rail-nav a.is-leaving {
  opacity: 0.42;
}

.section-rail:focus-within {
  --rail-reveal: 1;
}

.section-rail.is-revealed .section-rail-nav a,
.section-rail.is-handoff .section-rail-nav a,
.section-rail:focus-within .section-rail-nav a {
  pointer-events: auto;
  transition:
    color var(--response-fast) ease,
    opacity 180ms ease;
}

.section-rail-nav a:hover,
.section-rail-nav a:focus-visible {
  color: var(--ink);
  opacity: 0.9;
}

.section-rail-nav a:hover::after,
.section-rail-nav a:focus-visible::after {
  opacity: 1;
  transform: scaleX(1);
}

.index-page .opening {
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: auto auto;
  align-content: center;
  row-gap: clamp(5.5rem, 12vh, 7.5rem);
  min-height: calc(100svh - 4.5rem);
  padding-block: clamp(2.25rem, 5vh, 3.5rem);
}

.index-page .opening-copy {
  align-self: start;
}

.index-page h1 {
  max-width: 18ch;
  margin-bottom: 0.8rem;
  font-size: clamp(3.2rem, 6vw, 5.8rem);
  letter-spacing: -0.045em;
  line-height: 0.94;
}

.index-page .opening-note {
  width: fit-content;
  color: var(--cream);
  font-family: var(--mono);
  font-size: var(--text-support);
}

.index-page .watchlist {
  grid-column: 1;
  grid-row: 2;
  margin-top: 0;
}

.watch-toggle {
  display: inline-flex;
  gap: 0.45rem;
  align-items: center;
}

.watch-toggle-icon {
  width: 0.74rem;
  height: 0.62rem;
  overflow: visible;
}

.watch-toggle-icon path {
  d: path("M1.5 2.5 L6 7 L10.5 2.5");
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.25;
  transition: d 260ms var(--ease);
}

.watch-toggle[aria-expanded="true"] .watch-toggle-icon path {
  d: path("M1.5 7 L6 2.5 L10.5 7");
}

button.watch-item.is-selected {
  color: var(--ink);
}

button.watch-item.is-selected::after {
  opacity: 0.9;
  transform: scaleX(1);
}

.index-page .section-intro h2,
.index-page .contact-section h2 {
  font-size: clamp(2.55rem, 5.1vw, 5.1rem);
}

.index-page .tools-section .section-intro h2,
.index-page .contact-section h2 {
  font-size: clamp(2.38rem, 4.25vw, 4.1rem);
}

.index-page .models-section {
  padding-block: clamp(3.25rem, 6.5vh, 4.5rem);
}

.index-page .models-intro {
  margin-bottom: clamp(1.5rem, 3vh, 2.35rem);
}

.index-page .models-intro p:last-child {
  margin-top: 0.65rem;
  font-size: 0.98rem;
}

.index-page .model-workbench {
  grid-template-columns: minmax(14.5rem, 0.3fr) minmax(0, 1fr);
}

.index-page .model-option {
  min-height: 4.55rem;
  padding-block: 0.72rem;
}

.index-page .model-panel {
  padding: clamp(1rem, 2.1vw, 1.65rem);
}

.index-page .model-panel-head {
  gap: 1.4rem;
  min-height: 6.75rem;
}

.index-page .model-copy h3 {
  font-size: clamp(1.75rem, 3.15vw, 2.9rem);
}

.index-page .model-copy p:last-child {
  font-size: 0.92rem;
  line-height: 1.4;
}

.index-page .chart-toolbar {
  margin-top: 0.65rem;
}

.index-page .chart-stage,
.index-page #model-chart {
  min-height: 18rem;
  height: 18rem;
}

.index-page .chart-credit {
  margin-top: 0.85rem;
}

@media (min-width: 1360px) {
  .section-rail.is-available {
    display: grid;
  }
}

@media (max-width: 980px) {
  .index-page .model-panel-head {
    min-height: 0;
  }

  .index-page .model-workbench {
    grid-template-columns: 13.5rem minmax(0, 1fr);
  }

  .index-page .chart-stage,
  .index-page #model-chart {
    min-height: 19rem;
    height: 19rem;
  }
}

@media (max-width: 760px) {
  .index-page {
    padding-top: 4rem;
  }

  .index-page .site-header,
  .index-page .site-header.is-transformed,
  .index-page .site-header.is-compact {
    position: fixed;
    top: 0;
    visibility: visible;
    border-bottom-color: var(--line);
    background: rgba(7, 7, 6, 0.76);
    opacity: 1;
    pointer-events: auto;
    transform: none;
    backdrop-filter: blur(18px) saturate(1.15);
  }

  .index-page .site-header .header-inner,
  .index-page .site-header.is-compact .header-inner {
    min-height: 4rem;
  }

  .section-rail {
    display: none !important;
  }

  .index-page .opening {
    align-content: start;
    row-gap: 0;
    min-height: auto;
    padding-top: clamp(2.25rem, 8vh, 4rem);
    padding-bottom: 1.4rem;
  }

  .index-page .watchlist {
    margin-top: clamp(2.5rem, 8vh, 4.25rem);
  }

  .index-page .content-section,
  .index-page .contact-section {
    padding-block: 4.5rem;
  }

  .index-page .models-section {
    padding-block: 3.75rem;
  }

  .index-page .model-workbench {
    grid-template-columns: 1fr;
  }

  .index-page .chart-stage,
  .index-page #model-chart {
    min-height: 21rem;
    height: 21rem;
  }
}

@media (max-width: 540px) {
  .index-page {
    padding-top: 5.5rem;
  }

  .index-page .site-header .header-inner,
  .index-page .site-header.is-compact .header-inner {
    min-height: 5.5rem;
  }

  .index-page h1 {
    max-width: 14ch;
    font-size: clamp(2.85rem, 14vw, 4.4rem);
    line-height: 0.96;
  }

  .index-page .opening {
    min-height: auto;
    padding-top: clamp(1.9rem, 5vh, 2.8rem);
  }

  .index-page .watchlist {
    margin-top: 2.25rem;
  }

  .index-page .content-section,
  .index-page .contact-section {
    padding-block: 3.5rem;
  }

  .index-page .models-section {
    padding-block: 3rem;
  }

  .index-page .model-panel {
    padding-inline: 0;
  }

  .index-page .model-panel-head,
  .index-page .chart-toolbar,
  .index-page .chart-foot,
  .index-page .chart-credit {
    margin-inline: 0.75rem;
  }

  .index-page .chart-toolbar {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 0.75rem;
    align-items: stretch;
  }

  .index-page .range-control {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0.25rem;
  }

  .index-page .range-control button {
    min-width: 0;
    min-height: 2.75rem;
  }

  .index-page .chart-data-state {
    max-width: none;
    text-align: left;
    line-height: 1.45;
  }

  .index-page .session-key {
    justify-content: space-between;
    gap: 0.5rem;
    padding-inline: 0.75rem;
  }

  .watch-actions {
    gap: 0.45rem;
  }

  .watch-toggle {
    min-height: 2.75rem;
  }
}

@media (max-width: 340px) {
  .brand-name {
    font-size: 0.85rem;
  }

  .site-nav {
    gap: 0.4rem;
    font-size: var(--text-micro);
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

}