/* Hallmark · macrostructure: Index-First · tone: wayfinding reference manual · anchor hue: electric lime · contrast: pass (46–50) · nav: N6 index rail · footer: Ft2 sign-off · slop: pass (51–55) · honest: pass (56) · chrome: pass (57) · tokens: pass (58) · responsive: pass (59) · icons: pass (60) · mobile: pass (36, 59, 61–69) */
/* Hallmark · pre-emit critique: P5 H5 E4 S5 R5 V4 */

@import url("tokens.css");

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

html,
body {
  margin: 0;
  overflow-x: clip;
}

html {
  scroll-behavior: smooth;
  scroll-padding-block-start: 5.5rem;
}

body {
  min-width: 20rem;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.62;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--color-selection);
  color: var(--color-accent-ink);
}

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 4px;
}

a {
  color: inherit;
  text-decoration-color: var(--color-rule-strong);
  text-decoration-thickness: var(--rule-thin);
  text-underline-offset: 0.24em;
}

a:hover {
  text-decoration-color: var(--color-brand-lime);
}

a:active {
  opacity: 0.72;
}

button,
summary,
select {
  font: inherit;
}

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

img,
svg {
  display: block;
  max-width: 100%;
}

img {
  height: auto;
}

p,
li {
  max-width: var(--measure);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-display);
  overflow-wrap: anywhere;
  text-wrap: balance;
}

h1 {
  max-width: 12ch;
  font-size: var(--text-display);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 0.98;
}

h2 {
  font-size: clamp(var(--text-2xl), 5vw, var(--text-3xl));
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.05;
}

h3 {
  font-size: var(--text-lg);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.12;
}

.skip-link {
  position: fixed;
  inset-block-start: var(--space-md);
  inset-inline-start: var(--space-md);
  z-index: 100;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-brand-lime);
  color: var(--color-accent-ink);
  font-weight: 800;
  transform: translateY(-200%);
  transition: transform var(--dur-short) var(--ease-out);
}

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

.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 30;
  display: flex;
  min-height: 4.5rem;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-sm) max(var(--space-md), env(safe-area-inset-left));
  border-block-end: var(--rule-thin) solid var(--color-rule);
  background: color-mix(in oklch, var(--color-paper) 92%, transparent);
  backdrop-filter: blur(14px);
}

.site-header__brand {
  flex: 0 1 12rem;
  min-width: 0;
  text-decoration: none;
}

.site-header__brand img {
  width: 100%;
  height: auto;
}

.site-header__meta {
  margin: 0;
  color: var(--color-muted);
  font-size: var(--text-xs);
  font-weight: 500;
  white-space: nowrap;
}

.page-shell {
  width: min(100%, var(--content-max));
  margin-inline: auto;
}

.manual-nav {
  position: sticky;
  inset-block-start: 4.5rem;
  z-index: 20;
  border-block-end: var(--rule-thin) solid var(--color-rule);
  background: var(--color-paper);
}

.manual-nav summary {
  min-height: 3.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-inline: var(--space-md);
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}

.manual-nav summary::-webkit-details-marker {
  display: none;
}

.manual-nav summary::after {
  content: "+";
  color: var(--color-muted);
  font-size: var(--text-md);
}

.manual-nav[open] summary::after {
  content: "−";
}

.manual-nav__inner {
  max-height: calc(100dvh - 8rem);
  overflow-y: auto;
  padding: 0 var(--space-md) var(--space-lg);
}

.manual-nav__mark {
  display: none;
}

.manual-nav ul {
  display: grid;
  gap: var(--space-2xs);
  margin: 0;
  padding: 0;
  list-style: none;
}

.manual-nav a {
  display: flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding-inline: var(--space-sm);
  text-decoration: none;
  border-radius: var(--radius-sm);
  color: var(--color-ink-2);
  font-size: var(--text-sm);
  font-weight: 500;
  white-space: nowrap;
}

.manual-nav a::after {
  width: 0.5rem;
  height: 0.5rem;
  flex: 0 0 auto;
  border-radius: var(--radius-round);
  background: transparent;
  content: "";
}

.manual-nav a:hover,
.manual-nav a[aria-current="true"] {
  background: var(--color-paper-2);
  color: var(--color-ink);
}

.manual-nav a[aria-current="true"]::after {
  background: var(--color-brand-lime);
}

.manual-nav__download {
  margin-block-start: var(--space-lg);
}

.manual {
  min-width: 0;
}

.section {
  min-width: 0;
  padding: var(--space-3xl) var(--space-md);
  border-block-end: var(--rule-thin) solid var(--color-rule);
  scroll-margin-block-start: 5rem;
}

.section--cover {
  min-height: min(50rem, calc(100dvh - 4.5rem));
  display: grid;
  align-content: space-between;
  gap: var(--space-4xl);
  padding-block-start: var(--space-4xl);
}

.cover__intro {
  display: grid;
  gap: var(--space-xl);
}

.cover__title-accent {
  color: var(--color-ink);
}

.cover__title-accent::after {
  display: inline-block;
  width: 0.18em;
  height: 0.48em;
  margin-inline-start: 0.08em;
  border-radius: var(--radius-round);
  background: var(--color-brand-lime);
  content: "";
  transform: rotate(22deg) translateY(-0.15em);
  transform-origin: center;
  animation: signal-settle 720ms var(--ease-out) both;
}

@keyframes signal-settle {
  from {
    clip-path: inset(38% 0 0);
    filter: blur(0.04em);
    transform: rotate(22deg) translateY(-0.3em);
  }

  to {
    clip-path: inset(0);
    filter: blur(0);
    transform: rotate(22deg) translateY(-0.15em);
  }
}

.cover__summary {
  margin: 0;
  color: var(--color-ink-2);
  font-size: var(--text-md);
  line-height: 1.52;
}

.context-index {
  margin: 0;
  padding: 0;
  border-block-start: var(--rule-thick) solid var(--color-ink);
  list-style: none;
}

.context-index li {
  max-width: none;
  border-block-end: var(--rule-thin) solid var(--color-rule-strong);
}

.context-index a {
  display: grid;
  min-height: 4rem;
  align-items: center;
  gap: var(--space-xs);
  padding-block: var(--space-md);
  text-decoration: none;
}

.context-index strong {
  font-size: var(--text-md);
  line-height: 1.2;
}

.context-index span {
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.section-head {
  display: grid;
  gap: var(--space-lg);
  margin-block-end: var(--space-2xl);
}

.section-head p {
  margin: 0;
  color: var(--color-ink-2);
  font-size: var(--text-md);
}

.rule-list {
  display: grid;
  margin: 0;
  padding: 0;
  border-block-start: var(--rule-thick) solid var(--color-ink);
  list-style: none;
}

.rule-list li {
  display: grid;
  max-width: none;
  gap: var(--space-xs);
  padding-block: var(--space-lg);
  border-block-end: var(--rule-thin) solid var(--color-rule);
}

.rule-list strong {
  font-size: var(--text-md);
  line-height: 1.25;
}

.rule-list span {
  color: var(--color-muted);
}

.specimen-stack {
  display: grid;
  gap: var(--space-xl);
}

.specimen {
  min-width: 0;
  overflow: clip;
  border: var(--rule-thin) solid var(--color-rule-strong);
  background: var(--color-paper);
}

.specimen--dark {
  border-color: var(--color-brand-dark);
  background: var(--color-brand-dark);
  color: var(--color-brand-offwhite);
}

.specimen__stage {
  min-height: 16rem;
  display: grid;
  place-items: center;
  padding: var(--space-xl);
}

.specimen__stage--compact {
  min-height: 12rem;
}

.specimen__stage img {
  width: min(100%, 56rem);
  height: auto;
}

.specimen__stage--symbol img {
  width: min(64%, 20rem);
}

.specimen__meta {
  display: grid;
  gap: var(--space-lg);
  padding: var(--space-lg);
  border-block-start: var(--rule-thin) solid var(--color-rule);
}

.specimen--dark .specimen__meta {
  border-color: var(--color-ink-2);
}

.specimen__meta p {
  margin: var(--space-xs) 0 0;
  color: var(--color-muted);
}

.specimen--dark .specimen__meta p {
  color: var(--color-rule);
}

.asset-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
}

.action-link,
.copy-button {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-md);
  border: var(--rule-thin) solid currentColor;
  border-radius: var(--radius-round);
  background: transparent;
  color: inherit;
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: 800;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--dur-short) var(--ease-out),
    color var(--dur-short) var(--ease-out),
    transform var(--dur-instant) var(--ease-out);
}

.action-link:hover,
.copy-button:hover {
  background: var(--color-ink);
  color: var(--color-paper);
}

.specimen--dark .action-link:hover,
.specimen--dark .copy-button:hover {
  background: var(--color-brand-offwhite);
  color: var(--color-brand-dark);
}

.action-link:active,
.copy-button:active {
  transform: translateY(1px);
}

.copy-button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.copy-button[data-state="copied"] {
  border-color: var(--color-brand-lime);
  background: var(--color-accent-soft);
  color: var(--color-accent-ink);
}

.copy-button[data-state="error"] {
  border-style: dashed;
}

.usage-grid {
  display: grid;
  gap: var(--space-xl);
}

.usage-example {
  min-width: 0;
  padding-block: var(--space-lg);
  border-block-start: var(--rule-thick) solid var(--color-ink);
}

.usage-example h3 {
  margin-block-end: var(--space-sm);
}

.usage-example p {
  margin: 0;
  color: var(--color-muted);
}

.website-header {
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  margin-block: var(--space-lg);
  padding: var(--space-md);
  border: var(--rule-thin) solid var(--color-rule-strong);
  background: var(--color-paper);
}

.website-header--dark {
  border-color: var(--color-ink-2);
  background: var(--color-brand-dark);
}

.website-header img {
  width: min(46%, 14rem);
  height: auto;
}

.website-header__links {
  display: none;
  gap: var(--space-lg);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.website-header--dark .website-header__links {
  color: var(--color-rule);
}

.course-signature {
  display: grid;
  gap: var(--space-xl);
  margin-block-start: var(--space-2xl);
  padding: var(--space-xl);
  background: var(--color-paper-2);
}

.course-signature__mark {
  width: min(45%, 8rem);
}

.course-signature__copy {
  align-self: end;
}

.course-signature__copy p {
  margin: 0;
  color: var(--color-muted);
}

.social-showcase {
  display: grid;
  gap: var(--space-xl);
}

.avatar-stage {
  min-height: 22rem;
  display: grid;
  place-items: center;
  padding: var(--space-2xl);
  background: var(--color-paper-2);
}

.avatar-stage--dark {
  background: var(--color-brand-dark);
}

.avatar {
  width: min(68vw, 18rem);
  aspect-ratio: 1;
  object-fit: cover;
}

.avatar--circle {
  border-radius: 50%;
}

.size-strip {
  display: flex;
  min-width: 0;
  align-items: end;
  flex-wrap: wrap;
  gap: clamp(var(--space-sm), 4vw, var(--space-xl));
  padding: var(--space-xl);
  border: var(--rule-thin) solid var(--color-rule-strong);
  background: var(--color-paper-2);
}

.size-strip figure {
  display: grid;
  flex: 0 0 auto;
  gap: var(--space-sm);
  justify-items: center;
  margin: 0;
}

.size-strip img {
  width: var(--icon-preview-size);
  height: var(--icon-preview-size);
}

.size-strip figcaption {
  color: var(--color-muted);
  font-size: var(--text-xs);
  font-variant-numeric: tabular-nums;
}

.size-preview--xl {
  --icon-preview-size: 12rem;
}

.size-preview--lg {
  --icon-preview-size: 7.5rem;
}

.size-preview--md {
  --icon-preview-size: 3.75rem;
}

.size-preview--sm {
  --icon-preview-size: 2rem;
}

.size-preview--xs {
  --icon-preview-size: 1.25rem;
}

.palette {
  display: grid;
  border-block-start: var(--rule-thick) solid var(--color-ink);
}

.swatch {
  display: grid;
  min-height: 10rem;
  align-content: space-between;
  gap: var(--space-xl);
  padding: var(--space-lg);
  border-block-end: var(--rule-thin) solid var(--color-rule);
  background: var(--swatch-color);
  color: var(--swatch-ink);
}

.swatch strong {
  font-size: var(--text-lg);
  line-height: 1.1;
}

.swatch code {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
}

.swatch .copy-button {
  justify-self: start;
}

.swatch--black {
  --swatch-color: var(--color-brand-black);
  --swatch-ink: var(--color-brand-offwhite);
}

.swatch--dark {
  --swatch-color: var(--color-brand-dark);
  --swatch-ink: var(--color-brand-offwhite);
}

.swatch--offwhite {
  --swatch-color: var(--color-brand-offwhite);
  --swatch-ink: var(--color-brand-black);
}

.swatch--lime {
  --swatch-color: var(--color-brand-lime);
  --swatch-ink: var(--color-accent-ink);
}

.type-specimen {
  display: grid;
  gap: var(--space-xl);
  padding-block: var(--space-xl);
  border-block-start: var(--rule-thick) solid var(--color-ink);
}

.type-line {
  display: grid;
  gap: var(--space-sm);
  padding-block-end: var(--space-xl);
  border-block-end: var(--rule-thin) solid var(--color-rule);
}

.type-line__sample {
  margin: 0;
  font-size: clamp(var(--text-xl), 6vw, var(--text-3xl));
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.type-line__sample--regular {
  font-weight: 400;
}

.type-line__sample--medium {
  font-weight: 500;
}

.type-line__sample--extra-bold {
  font-weight: 800;
}

.type-line__meta {
  margin: 0;
  color: var(--color-muted);
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
}

.clearspace-demo {
  position: relative;
  display: grid;
  min-height: 20rem;
  place-items: center;
  padding: clamp(var(--space-2xl), 10vw, var(--space-4xl));
  border: var(--rule-thin) solid var(--color-rule-strong);
  background: var(--color-paper-2);
}

.clearspace-demo::before,
.clearspace-demo::after {
  position: absolute;
  background: var(--color-brand-lime);
  content: "";
  opacity: 0.7;
}

.clearspace-demo::before {
  inset-block-start: var(--space-xl);
  inset-block-end: var(--space-xl);
  inset-inline-start: 50%;
  width: var(--rule-thin);
}

.clearspace-demo::after {
  inset-inline-start: var(--space-xl);
  inset-inline-end: var(--space-xl);
  inset-block-start: 50%;
  height: var(--rule-thin);
}

.clearspace-demo img {
  position: relative;
  z-index: 1;
  width: min(100%, 46rem);
}

.misuse-grid {
  display: grid;
  gap: var(--space-xl);
}

.misuse {
  position: relative;
  min-width: 0;
  display: grid;
  gap: var(--space-lg);
  padding-block: var(--space-lg);
  border-block-start: var(--rule-thick) solid var(--color-ink);
}

.misuse::after {
  position: absolute;
  inset-block-start: var(--space-md);
  inset-inline-end: 0;
  width: 1.75rem;
  height: var(--rule-thick);
  background: var(--color-ink);
  content: "";
  transform: rotate(-35deg);
}

.misuse__stage {
  min-height: 10rem;
  display: grid;
  place-items: center;
  padding: var(--space-lg);
  background: var(--color-paper-2);
}

.misuse__stage img {
  width: min(100%, 30rem);
}

.misuse--stretch img {
  transform: scaleX(1.35);
}

.misuse--rotate img {
  transform: rotate(-7deg);
}

.misuse--effect img {
  filter: drop-shadow(0.55rem 0.55rem 0 var(--color-brand-lime));
}

.misuse h3 {
  padding-inline-end: var(--space-2xl);
}

.misuse p {
  margin: 0;
  color: var(--color-muted);
}

.download-index {
  margin: 0;
  padding: 0;
  border-block-start: var(--rule-thick) solid var(--color-ink);
  list-style: none;
}

.download-index li {
  max-width: none;
  border-block-end: var(--rule-thin) solid var(--color-rule);
}

.download-index a {
  display: grid;
  min-height: 5rem;
  align-items: center;
  gap: var(--space-xs);
  padding-block: var(--space-md);
  text-decoration: none;
}

.download-index strong {
  font-size: var(--text-md);
}

.download-index span {
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.site-footer {
  display: grid;
  gap: var(--space-2xl);
  padding: var(--space-3xl) var(--space-md) max(var(--space-3xl), env(safe-area-inset-bottom));
  background: var(--color-brand-dark);
  color: var(--color-brand-offwhite);
}

.site-footer img {
  width: min(100%, 30rem);
}

.site-footer p {
  margin: 0;
  color: var(--color-rule);
}

.site-footer a {
  color: var(--color-brand-offwhite);
}

@media (min-width: 40rem) {
  .site-header {
    padding-inline: var(--space-xl);
  }

  .site-header__brand {
    flex-basis: 15rem;
  }

  .section,
  .site-footer {
    padding-inline: var(--space-xl);
  }

  .context-index a,
  .download-index a {
    grid-template-columns: minmax(0, 0.75fr) minmax(0, 1.25fr);
    gap: var(--space-xl);
  }

  .section-head {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: end;
  }

  .section-head p {
    justify-self: end;
  }

  .rule-list li {
    grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.3fr);
    gap: var(--space-xl);
  }

  .specimen__meta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }

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

  .course-signature {
    min-height: 22rem;
    grid-template-columns: minmax(0, 0.55fr) minmax(0, 1.45fr);
    align-items: end;
  }

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

  .swatch {
    min-height: 14rem;
    border-inline-end: var(--rule-thin) solid var(--color-rule);
  }
}

@media (min-width: 64rem) {
  .site-header {
    min-height: 5rem;
    padding-inline: var(--space-2xl);
  }

  .page-shell {
    display: grid;
    grid-template-columns: var(--rail-width) minmax(0, 1fr);
  }

  .manual-nav {
    position: sticky;
    inset-block-start: 5rem;
    align-self: start;
    height: calc(100dvh - 5rem);
    border-inline-end: var(--rule-thin) solid var(--color-rule);
    border-block-end: 0;
  }

  .manual-nav summary {
    display: none;
  }

  .manual-nav__inner {
    max-height: none;
    height: 100%;
    display: grid;
    grid-template-rows: auto 1fr auto;
    gap: var(--space-xl);
    padding: var(--space-xl);
  }

  .manual-nav__mark {
    width: 5.5rem;
    height: auto;
    align-self: start;
    display: block;
  }

  .manual-nav ul {
    align-content: start;
  }

  .section,
  .site-footer {
    padding-inline: clamp(var(--space-2xl), 6vw, var(--space-4xl));
  }

  .section {
    padding-block: var(--space-4xl);
  }

  .section--cover {
    min-height: calc(100dvh - 5rem);
    padding-block-start: var(--space-5xl);
  }

  .cover__intro {
    grid-template-columns: minmax(0, 1.15fr) minmax(18rem, 0.85fr);
    align-items: end;
  }

  .cover__summary {
    justify-self: end;
  }

  .website-header__links {
    display: flex;
  }

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

  .palette {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 88rem) {
  .usage-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

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

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

@media (forced-colors: active) {
  .manual-nav a[aria-current="true"]::after,
  .cover__title-accent::after,
  .clearspace-demo::before,
  .clearspace-demo::after {
    forced-color-adjust: none;
  }
}