/* ==========================================================================
   InkAndAltitude
   Design note: the prints are deep-ground survey charts with fine linework and
   monospace spec plates. The site chrome therefore stays close to monochrome -
   drafting bone and ink - and lets the artwork supply the colour. A single acid
   accent stands in for the instrument marks on a survey sheet; it is used for
   rules, ticks and states, never as body text on a light ground.
   ========================================================================== */

@font-face {
  font-family: "Archivo";
  src: url("/assets/fonts/archivo-400-800.woff2") format("woff2");
  font-weight: 400 800;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("/assets/fonts/ibm-plex-mono-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("/assets/fonts/ibm-plex-mono-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* ---------- tokens ---------- */

:root {
  --paper: #edefea;
  --surface: #f6f7f3;
  --surface-2: #e4e7df;
  --ink: #10161c;
  --ink-2: #48535d;
  --ink-3: #5c666f; /* >=4.5:1 on --paper and --surface for small mono text */
  --rule: #d2d7ce;
  --rule-strong: #b6bdb1;
  --accent: #b4c91e;
  --accent-ink: #55650a;
  --shadow: 0 1px 2px rgba(16, 22, 28, 0.05), 0 8px 24px -12px rgba(16, 22, 28, 0.18);

  --btn-bg: #10161c;
  --btn-fg: #edefea;
  --btn-hover-bg: #55650a;
  --btn-hover-fg: #ffffff;
  --band-bg: #10161c;
  --band-fg: #edefea;
  --band-rule: #2a333c;
  --band-btn-bg: #b4c91e;
  --band-btn-fg: #10161c;
  --band-btn-hover-bg: #edefea;
  --band-btn-hover-fg: #10161c;

  --sans: "Archivo", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo,
    Consolas, "Liberation Mono", monospace;

  --step--2: 0.72rem;
  --step--1: 0.83rem;
  --step-0: 1rem;
  --step-1: 1.16rem;
  --step-2: clamp(1.35rem, 1.1rem + 0.8vw, 1.7rem);
  --step-3: clamp(1.7rem, 1.3rem + 1.6vw, 2.4rem);
  --step-4: clamp(2.2rem, 1.4rem + 3.4vw, 3.9rem);

  --gutter: clamp(1.15rem, 4vw, 2.75rem);
  --wide: 1200px;
  --measure: 68ch;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0b1015;
    --surface: #121920;
    --surface-2: #1a222a;
    --ink: #e9ede9;
    --ink-2: #a0abb3;
    --ink-3: #7f8b94;
    --rule: #212a32;
    --rule-strong: #2f3a44;
    --accent: #cfe64f;
    --accent-ink: #cfe64f;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.5), 0 10px 30px -14px rgba(0, 0, 0, 0.8);

    --btn-bg: #e9ede9;
    --btn-fg: #0b1015;
    --btn-hover-bg: #cfe64f;
    --btn-hover-fg: #0b1015;
    --band-bg: #121920;
    --band-fg: #e9ede9;
    --band-rule: #212a32;
    --band-btn-bg: #cfe64f;
    --band-btn-fg: #0b1015;
    --band-btn-hover-bg: #e9ede9;
    --band-btn-hover-fg: #0b1015;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --paper: #0b1015;
  --surface: #121920;
  --surface-2: #1a222a;
  --ink: #e9ede9;
  --ink-2: #a0abb3;
  --ink-3: #7f8b94;
  --rule: #212a32;
  --rule-strong: #2f3a44;
  --accent: #cfe64f;
  --accent-ink: #cfe64f;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.5), 0 10px 30px -14px rgba(0, 0, 0, 0.8);

  --btn-bg: #e9ede9;
  --btn-fg: #0b1015;
  --btn-hover-bg: #cfe64f;
  --btn-hover-fg: #0b1015;
  --band-bg: #121920;
  --band-fg: #e9ede9;
  --band-rule: #212a32;
  --band-btn-bg: #cfe64f;
  --band-btn-fg: #0b1015;
  --band-btn-hover-bg: #e9ede9;
  --band-btn-hover-fg: #0b1015;
  color-scheme: dark;
}

/* ---------- base ---------- */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: var(--step-0);
  line-height: 1.6;
  font-synthesis-weight: none;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
  text-decoration-color: var(--rule-strong);
  transition: text-decoration-color 0.15s ease, color 0.15s ease;
}
a:hover {
  text-decoration-color: var(--accent-ink);
}

:focus-visible {
  outline: 2px solid var(--accent-ink);
  outline-offset: 3px;
  border-radius: 2px;
}

h1,
h2,
h3,
h4 {
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.022em;
  margin: 0;
  text-wrap: balance;
}

p {
  margin: 0 0 1em;
  text-wrap: pretty;
}

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 0;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 0.7rem 1.1rem;
  z-index: 100;
  font: 500 var(--step--1) / 1 var(--mono);
}
.skip:focus {
  left: 0.5rem;
  top: 0.5rem;
}

/* ---------- layout ---------- */

.wrap {
  width: min(100% - calc(var(--gutter) * 2), var(--wide));
  margin-inline: auto;
}

.prose {
  max-width: var(--measure);
}

.section {
  padding-block: clamp(3.25rem, 8vw, 6rem);
  border-top: 1px solid var(--rule);
}
.section--flush {
  border-top: 0;
}

/* ---------- typographic details ---------- */

.eyebrow {
  font: 500 var(--step--2) / 1 var(--mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 1.4rem;
}
.eyebrow::before {
  content: "";
  width: 1.5rem;
  height: 2px;
  background: var(--accent);
  flex: none;
}

.mono {
  font-family: var(--mono);
  font-size: var(--step--1);
  letter-spacing: 0.01em;
}

.lede {
  font-size: var(--step-1);
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 56ch;
}

.h-section {
  font-size: var(--step-3);
  max-width: 22ch;
}

.dim {
  color: var(--ink-3);
}

/* ---------- header ---------- */

.site-head {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--rule);
}

/* Mobile: brand + theme toggle on row one, nav on its own row beneath.
   From 720px up it collapses back to a single row. */
.site-head__inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  padding-block: 0.7rem;
  min-height: 3.5rem;
}
@media (min-width: 720px) {
  .site-head__inner {
    flex-wrap: nowrap;
    padding-block: 0;
    min-height: 4.25rem;
  }
}

.brand {
  font-weight: 700;
  letter-spacing: -0.03em;
  font-size: 1.06rem;
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
  gap: 0.05rem;
  margin-right: auto;
  white-space: nowrap;
}
.brand__amp {
  color: var(--accent-ink);
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.9em;
  padding-inline: 0.12em;
}

.site-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.3rem clamp(0.9rem, 2.2vw, 1.9rem);
  order: 3;
  width: 100%;
  border-top: 1px solid var(--rule);
  padding-top: 0.6rem;
}
@media (min-width: 720px) {
  .site-nav {
    order: 0;
    width: auto;
    border-top: 0;
    padding-top: 0;
    flex-wrap: nowrap;
  }
}
/* :not(.btn) keeps these from out-specifying the button rules below */
.site-nav a:not(.btn) {
  font-size: var(--step--1);
  text-decoration: none;
  color: var(--ink-2);
  padding-block: 0.35rem;
  position: relative;
}
.site-nav a:not(.btn):hover {
  color: var(--ink);
}
.site-nav a[aria-current="page"]:not(.btn) {
  color: var(--ink);
}
.site-nav a[aria-current="page"]:not(.btn)::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.1rem;
  height: 2px;
  background: var(--accent);
}

.nav-hide {
  display: none;
}
@media (min-width: 720px) {
  .nav-hide {
    display: inline-flex;
  }
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font: 500 var(--step--1) / 1 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.85rem 1.35rem;
  border: 1px solid var(--btn-bg);
  background: var(--btn-bg);
  color: var(--btn-fg);
  border-radius: 1px;
  transition: transform 0.12s ease, background 0.15s ease, color 0.15s ease,
    border-color 0.15s ease;
  white-space: nowrap;
}
.btn:hover {
  transform: translateY(-1px);
  background: var(--btn-hover-bg);
  border-color: var(--btn-hover-bg);
  color: var(--btn-hover-fg);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--rule-strong);
}
.btn--ghost:hover {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}

.btn--small {
  padding: 0.6rem 1rem;
  font-size: var(--step--2);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

/* theme toggle */
.theme-toggle {
  font: 500 var(--step--2) / 1 var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: transparent;
  color: var(--ink-3);
  border: 1px solid var(--rule);
  border-radius: 1px;
  padding: 0.5rem 0.6rem;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.theme-toggle:hover {
  color: var(--ink);
  border-color: var(--rule-strong);
}

/* ---------- status chips ---------- */

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font: 500 var(--step--2) / 1 var(--mono);
  letter-spacing: 0.11em;
  text-transform: uppercase;
  padding: 0.42rem 0.7rem;
  border: 1px solid var(--rule-strong);
  border-radius: 1px;
  color: var(--ink-2);
  background: var(--surface);
  white-space: nowrap;
}
.chip::before {
  content: "";
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: currentColor;
  flex: none;
}
.chip--live {
  color: var(--accent-ink);
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, var(--surface));
}
.chip--development {
  color: var(--ink-3);
  border-style: dashed;
}

/* ---------- hero ---------- */

.hero {
  padding-block: clamp(2.75rem, 7vw, 5.5rem) clamp(3rem, 7vw, 5.5rem);
}

.hero__grid {
  display: grid;
  gap: clamp(2.25rem, 5vw, 4rem);
  align-items: center;
}
@media (min-width: 900px) {
  .hero__grid {
    grid-template-columns: 1.05fr 0.95fr;
  }
}

.hero h1 {
  font-size: var(--step-4);
  letter-spacing: -0.035em;
  margin-bottom: 1.1rem;
  max-width: 15ch;
}

.hero__lede {
  font-size: var(--step-1);
  color: var(--ink-2);
  max-width: 46ch;
  margin-bottom: 1.9rem;
}

.hero__note {
  margin-top: 1.6rem;
  font-family: var(--mono);
  font-size: var(--step--2);
  color: var(--ink-3);
  letter-spacing: 0.02em;
  max-width: 44ch;
  line-height: 1.75;
}

/* framed artwork - evokes a mounted print rather than a product shot */
.plate {
  background: var(--surface);
  border: 1px solid var(--rule);
  padding: clamp(0.85rem, 2.2vw, 1.5rem);
  box-shadow: var(--shadow);
  position: relative;
}
.plate img {
  width: 100%;
  border: 1px solid var(--rule);
}
.plate figcaption {
  margin-top: clamp(0.85rem, 2vw, 1.15rem);
  padding-top: 0.8rem;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: var(--step--2);
  line-height: 1.7;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}
.plate figcaption strong {
  color: var(--ink-2);
  font-weight: 500;
  display: block;
}

/* corner survey ticks */
.plate::before,
.plate::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  border-color: var(--accent);
  border-style: solid;
  pointer-events: none;
}
.plate::before {
  top: -1px;
  left: -1px;
  border-width: 2px 0 0 2px;
}
.plate::after {
  bottom: -1px;
  right: -1px;
  border-width: 0 2px 2px 0;
}

/* ---------- pillars ---------- */

.pillars {
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
@media (min-width: 760px) {
  .pillars {
    grid-template-columns: repeat(3, 1fr);
  }
}
.pillar {
  background: var(--paper);
  padding: clamp(1.5rem, 3vw, 2.1rem);
}
.pillar__n {
  font: 500 var(--step--2) / 1 var(--mono);
  color: var(--accent-ink);
  letter-spacing: 0.12em;
  display: block;
  margin-bottom: 1.1rem;
}
.pillar h3 {
  font-size: var(--step-1);
  margin-bottom: 0.6rem;
}
.pillar p {
  color: var(--ink-2);
  font-size: var(--step--1);
  line-height: 1.65;
  margin: 0;
}

/* ---------- featured ---------- */

.featured {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
}
@media (min-width: 900px) {
  .featured {
    grid-template-columns: 0.85fr 1.15fr;
  }
}

/* ---------- spec plate (dl with leaders) ---------- */

.spec {
  margin: 1.6rem 0 0;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: var(--step--2);
  letter-spacing: 0.02em;
}
.spec div {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0 0.6rem;
  padding: 0.62rem 0;
  border-bottom: 1px solid var(--rule);
}
.spec dt {
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  flex: none;
}
.spec .leader {
  flex: 1;
  border-bottom: 1px dotted var(--rule-strong);
  transform: translateY(-0.22em);
  min-width: 1.5rem;
}
.spec dd {
  margin: 0 0 0 auto;
  color: var(--ink);
  text-align: right;
  overflow-wrap: anywhere;
}

/* ---------- print cards ---------- */

.cards {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.25rem);
}
@media (min-width: 640px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1000px) {
  .cards--3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--rule);
  transition: border-color 0.18s ease, transform 0.18s ease;
}
.card:hover {
  border-color: var(--rule-strong);
  transform: translateY(-2px);
}
.card__media {
  padding: clamp(0.85rem, 2vw, 1.2rem);
  border-bottom: 1px solid var(--rule);
}
.card__media img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: top center;
  border: 1px solid var(--rule);
  background: var(--surface-2);
}
.card__body {
  padding: clamp(1.15rem, 2.4vw, 1.5rem);
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 0.75rem;
}
.card__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.card__code {
  font: 500 var(--step--2) / 1 var(--mono);
  color: var(--ink-3);
  letter-spacing: 0.14em;
}
.card h3 {
  font-size: var(--step-2);
  margin: 0.15rem 0 0;
  width: 100%;
}
.card__blurb {
  color: var(--ink-2);
  font-size: var(--step--1);
  line-height: 1.62;
  margin: 0;
}
.card__data {
  margin-top: auto;
  padding-top: 0.9rem;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: var(--step--2);
  line-height: 1.6;
  color: var(--ink-2);
  letter-spacing: 0.015em;
}
.card__data span {
  display: block;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.35rem;
}

/* ---------- range entries (long form) ---------- */

.entry {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3.25rem);
  padding-block: clamp(2.5rem, 6vw, 4.25rem);
  border-top: 1px solid var(--rule);
  align-items: start;
}
@media (min-width: 880px) {
  .entry {
    grid-template-columns: 0.78fr 1.22fr;
  }
  .entry--flip > .plate {
    order: 2;
  }
}

.entry__head {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  flex-wrap: wrap;
  margin-bottom: 0.9rem;
}
.entry h2 {
  font-size: var(--step-3);
  margin: 0 0 0.85rem;
}
.entry__blurb {
  font-size: var(--step-1);
  color: var(--ink-2);
  line-height: 1.55;
  max-width: 52ch;
}
.entry__detail {
  color: var(--ink-2);
  max-width: 60ch;
  font-size: var(--step--1);
  line-height: 1.7;
}

.sources {
  list-style: none;
  padding: 0;
  margin: 1.4rem 0 0;
  font-family: var(--mono);
  font-size: var(--step--2);
  letter-spacing: 0.015em;
  line-height: 1.6;
}
.sources li {
  padding: 0.5rem 0 0.5rem 1.5rem;
  border-bottom: 1px solid var(--rule);
  position: relative;
  color: var(--ink-2);
}
.sources li:first-child {
  border-top: 1px solid var(--rule);
}
.sources li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.05em;
  width: 0.7rem;
  height: 1px;
  background: var(--accent);
}
.sources__label {
  font: 500 var(--step--2) / 1 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-3);
  margin: 1.6rem 0 0;
}

/* ---------- ledger table ---------- */

.ledger-scroll {
  overflow-x: auto;
  border: 1px solid var(--rule);
  background: var(--surface);
}
table.ledger {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: var(--step--2);
  letter-spacing: 0.015em;
  min-width: 42rem;
}
table.ledger th,
table.ledger td {
  text-align: left;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}
table.ledger thead th {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-3);
  font-weight: 500;
  background: var(--surface-2);
  white-space: nowrap;
}
table.ledger tbody tr:last-child td {
  border-bottom: 0;
}
table.ledger td:first-child {
  color: var(--ink);
  white-space: nowrap;
}
table.ledger td {
  color: var(--ink-2);
}

/* ---------- steps ---------- */

.steps {
  list-style: none;
  counter-reset: step;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
@media (min-width: 820px) {
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }
}
.steps li {
  counter-increment: step;
  background: var(--paper);
  padding: clamp(1.4rem, 3vw, 2rem);
}
.steps li::before {
  content: counter(step, decimal-leading-zero);
  font: 500 var(--step--2) / 1 var(--mono);
  color: var(--accent-ink);
  letter-spacing: 0.12em;
  display: block;
  margin-bottom: 1rem;
}
.steps h3 {
  font-size: var(--step-1);
  margin-bottom: 0.55rem;
}
.steps p {
  color: var(--ink-2);
  font-size: var(--step--1);
  line-height: 1.65;
  margin: 0;
}

/* ---------- pull quote / refusal callout ---------- */

.callout {
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  background: var(--surface);
  padding: clamp(1.4rem, 3.5vw, 2.25rem);
}
.callout p:last-child {
  margin-bottom: 0;
}
.callout__label {
  font: 500 var(--step--2) / 1 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent-ink);
  margin-bottom: 1rem;
  display: block;
}

blockquote.pull {
  margin: 0;
  font-size: var(--step-2);
  line-height: 1.45;
  letter-spacing: -0.015em;
  max-width: 30ch;
  font-weight: 600;
}
blockquote.pull cite {
  display: block;
  margin-top: 1.1rem;
  font: 400 var(--step--2) / 1.5 var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-style: normal;
}

/* ---------- split ---------- */

.split {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: start;
}
@media (min-width: 880px) {
  .split {
    grid-template-columns: 1fr 1fr;
  }
  .split--sticky > :first-child {
    position: sticky;
    top: 6.5rem;
  }
}

/* ---------- CTA band ---------- */

.band {
  background: var(--band-bg);
  color: var(--band-fg);
  border-block: 1px solid var(--band-rule);
}
.band .band__inner {
  padding-block: clamp(2.75rem, 6vw, 4.5rem);
  display: grid;
  gap: 1.75rem;
  align-items: center;
}
@media (min-width: 820px) {
  .band .band__inner {
    grid-template-columns: 1.3fr auto;
  }
}
.band h2 {
  font-size: var(--step-3);
  max-width: 20ch;
  margin-bottom: 0.75rem;
}
.band p {
  opacity: 0.72;
  margin: 0;
  max-width: 48ch;
  font-size: var(--step--1);
}
.band .btn {
  background: var(--band-btn-bg);
  border-color: var(--band-btn-bg);
  color: var(--band-btn-fg);
}
.band .btn:hover {
  background: var(--band-btn-hover-bg);
  border-color: var(--band-btn-hover-bg);
  color: var(--band-btn-hover-fg);
}
.band .btn:focus-visible {
  outline-color: var(--band-btn-bg);
}

/* ---------- page header ---------- */

.page-head {
  padding-block: clamp(2.75rem, 7vw, 5rem) clamp(2rem, 5vw, 3.25rem);
}
.page-head h1 {
  font-size: var(--step-4);
  letter-spacing: -0.035em;
  max-width: 18ch;
  margin-bottom: 1.2rem;
}

/* ---------- footer ---------- */

.site-foot {
  border-top: 1px solid var(--rule);
  padding-block: clamp(2.5rem, 5vw, 3.5rem) 2rem;
  margin-top: 0;
}
.site-foot__grid {
  display: grid;
  gap: 2rem;
  padding-bottom: 2.25rem;
}
@media (min-width: 760px) {
  .site-foot__grid {
    grid-template-columns: 1.6fr 1fr 1fr;
  }
}
.site-foot h2 {
  font: 500 var(--step--2) / 1 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-3);
  margin-bottom: 1.1rem;
}
.site-foot ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.6rem;
  font-size: var(--step--1);
}
.site-foot a {
  text-decoration: none;
  color: var(--ink-2);
}
.site-foot a:hover {
  color: var(--ink);
  text-decoration: underline;
}
.site-foot__blurb {
  color: var(--ink-2);
  font-size: var(--step--1);
  max-width: 40ch;
  line-height: 1.65;
}
.site-foot__base {
  border-top: 1px solid var(--rule);
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: var(--step--2);
  color: var(--ink-3);
  letter-spacing: 0.04em;
}

/* ---------- utilities ---------- */

.stack > * + * {
  margin-top: 1.5rem;
}
.stack-sm > * + * {
  margin-top: 0.9rem;
}
.mt-lg {
  margin-top: clamp(2rem, 4vw, 3rem);
}
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}