/* Hallmark · pre-emit critique: P5 H5 E5 S5 R5 V5 · genre: technical-editorial · tone: technical-austere · macrostructure: Index-First / Long Document · design-system: design.md · theme: studied-DNA (https://hudovich.com/) · anchor-hue: amber · nav: N9 · footer: Ft2 · designed-as-app · contrast: pass (40–41) · slop-test: 58/58 · honest: pass (46) · chrome: pass (47) · tokens: pass (48) · responsive: pass (49) · icons: pass (30) · mobile: pass (34, 49, 50–57) */
@import url("/tokens.css");

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

html,
body {
  overflow-x: clip;
}

html {
  min-width: 20rem;
  background: var(--color-paper);
}

body {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink-2);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-style: normal;
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main {
  flex: 0 0 auto;
}

img,
svg {
  display: block;
}

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

button,
a {
  color: inherit;
  font: inherit;
}

button {
  border: 0;
}

a {
  text-decoration-color: var(--color-accent);
  text-decoration-thickness: var(--rule-hair);
  text-underline-offset: 0.125em;
}

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

.brand:active,
.card-link:active,
.inline-link:active,
.arrow-link:active,
.footer-meta a:active {
  color: var(--color-accent);
}

h1,
h2,
h3,
p,
dl,
dd,
figure,
ul,
ol {
  margin: 0;
}

h1,
h2,
h3 {
  min-width: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-style: normal;
  overflow-wrap: anywhere;
}

h1 {
  font-size: var(--text-xl);
  font-weight: 650;
  letter-spacing: -0.025em;
  line-height: 1.3;
}

h2 {
  font-size: var(--text-xs);
  font-weight: 550;
  letter-spacing: 0.05em;
  line-height: 1.4;
  text-transform: uppercase;
}

h3 {
  font-size: var(--text-base);
  font-weight: 550;
  line-height: 1.4;
}

ul,
ol {
  padding: 0;
}

:focus-visible {
  outline: var(--rule-fine) solid var(--color-focus);
  outline-offset: var(--space-3xs);
}

[aria-disabled="true"],
:disabled {
  cursor: not-allowed;
  opacity: 0.5;
  pointer-events: none;
}

.skip-link {
  position: fixed;
  z-index: 10;
  inset-block-start: var(--space-sm);
  inset-inline-start: var(--space-sm);
  transform: translateY(-180%);
  padding: var(--space-xs) var(--space-sm);
  border: var(--rule-fine) solid var(--color-focus);
  border-radius: var(--radius-small);
  background: var(--color-paper);
  color: var(--color-ink);
  text-decoration: none;
}

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

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

/* N9 — edge-aligned header */
.site-header {
  flex: 0 0 auto;
}

.site-header-inner,
.site-nav {
  width: 100%;
  min-height: var(--space-3xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  margin: 0;
  padding-inline: var(--page-gutter);
}

.site-nav.container {
  max-width: none;
}

.brand {
  min-width: var(--control-height);
  min-height: var(--control-height);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  color: var(--color-ink);
  font-family: var(--font-outlier);
  font-weight: 650;
  letter-spacing: -0.03em;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.brand img {
  width: var(--space-lg);
  height: var(--space-lg);
}

:root[data-theme="light"] .brand img,
:root[data-theme="light"] .identity-mark img {
  content: url("/assets/brand/mark-light.svg");
}

.brand-context {
  color: var(--color-muted);
  font-weight: 400;
}

.theme-toggle {
  width: var(--control-height);
  height: var(--control-height);
  display: grid;
  flex: 0 0 auto;
  cursor: pointer;
  place-items: center;
  border: var(--rule-hair) solid transparent;
  border-radius: var(--radius-card);
  background: transparent;
  color: var(--color-ink-2);
  transition:
    background-color var(--dur-short) var(--ease-out),
    color var(--dur-short) var(--ease-out),
    transform var(--dur-micro) var(--ease-out);
}

.theme-toggle:active {
  transform: translateY(var(--rule-hair));
}

.theme-icon {
  width: var(--space-md);
  height: var(--space-md);
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.75;
}

.theme-icon--moon,
:root[data-theme="light"] .theme-icon--sun {
  display: none;
}

:root[data-theme="light"] .theme-icon--moon {
  display: block;
}

/* Homepage */
.page-main {
  flex: 1 0 auto;
  padding-block: var(--space-xl) var(--space-2xl);
}

.home-stack {
  display: grid;
  gap: var(--space-2xl);
}

.profile-intro {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.identity-mark {
  width: calc(var(--space-xl) * 2);
  height: calc(var(--space-xl) * 2);
  display: grid;
  margin-block-end: var(--space-md);
  place-items: center;
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-pill);
  background: var(--color-paper-2);
}

.identity-mark img {
  width: var(--space-xl);
  height: var(--space-xl);
}

.profile-intro h1 {
  margin-block-end: var(--space-sm);
}

.accent-underline {
  border-block-end: var(--rule-fine) solid var(--color-accent);
}

.profile-copy {
  display: grid;
  gap: var(--space-2xs);
  margin-block-end: var(--space-md);
  color: var(--color-ink);
}

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

.button {
  min-height: var(--control-height);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding-inline: var(--space-sm);
  border: var(--rule-hair) solid transparent;
  border-radius: var(--radius-card);
  font-size: var(--text-sm);
  font-weight: 550;
  line-height: 1;
  text-decoration: none;
  transition:
    background-color var(--dur-short) var(--ease-out),
    color var(--dur-short) var(--ease-out),
    transform var(--dur-micro) var(--ease-out);
  white-space: nowrap;
}

.button--primary {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.button--secondary {
  background: var(--color-paper-3);
  color: var(--color-ink);
}

.button:active {
  transform: translateY(var(--rule-hair));
}

.section-intro {
  margin-block-end: var(--space-sm);
}

.section-intro h2 + p {
  margin-block-start: var(--space-2xs);
}

.section-intro--compact {
  margin-block-end: var(--space-2xs);
}

.project-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-sm);
}

.compact-card {
  position: relative;
  min-width: 0;
  min-height: 7rem;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-sm);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-card);
  background: var(--color-paper-2);
  color: var(--color-ink-2);
  transition: border-color var(--dur-short) var(--ease-out);
}

.card-heading {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: var(--space-2xs);
}

.card-heading h3 {
  min-width: 0;
  font-weight: 650;
}

.badge {
  min-height: var(--space-lg);
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  padding-inline: var(--space-2xs);
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  color: var(--color-badge-ink);
  font-size: var(--text-xs);
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
}

.compact-card .card-heading > .badge:first-of-type {
  background: var(--color-paper-3);
  color: var(--color-ink-2);
}

.compact-card .card-heading > .badge + .badge {
  background: var(--color-accent-soft);
  color: var(--color-badge-ink);
}

.card-link {
  min-height: var(--control-height);
  display: inline-flex;
  align-items: center;
  color: var(--color-ink);
  text-decoration: none;
  white-space: nowrap;
}

.card-link::after {
  position: absolute;
  inset: 0;
  content: "";
}

.card-link:focus-visible {
  outline: none;
}

.compact-card:focus-within {
  outline: var(--rule-fine) solid var(--color-focus);
  outline-offset: var(--space-3xs);
}

.compact-card > p {
  padding-inline-end: var(--space-lg);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.card-arrow {
  position: absolute;
  inset-inline-end: var(--space-xs);
  inset-block-end: var(--space-xs);
  color: var(--color-muted);
  opacity: 0;
  transition: opacity var(--dur-short) var(--ease-out);
}

.practice-list {
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.practice-list > div {
  display: grid;
  grid-template-columns: 5.5rem minmax(0, 1fr);
  gap: var(--space-sm);
  padding-block: var(--space-xs);
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.practice-list dt {
  color: var(--color-ink);
  font-weight: 550;
}

.practice-list dd {
  color: var(--color-ink-2);
}

.lab-list {
  border-block-start: var(--rule-hair) solid var(--color-rule);
  list-style: none;
}

.lab-list li {
  display: grid;
  gap: var(--space-2xs);
  padding-block: var(--space-xs);
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.lab-list li > div {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2xs);
}

.lab-list strong {
  color: var(--color-ink);
  font-weight: 550;
}

.inline-link,
.arrow-link {
  min-height: var(--control-height);
  display: inline-flex;
  align-items: center;
  color: var(--color-ink);
  font-weight: 550;
  text-decoration-line: underline;
  transition:
    color var(--dur-short) var(--ease-out),
    text-decoration-thickness var(--dur-short) var(--ease-out);
  white-space: nowrap;
}

/* Case-study documents */
main > .container {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
  padding-block: var(--space-xl) var(--space-2xl);
}

.case-hero {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.case-label,
.diagram-label,
.meta,
.next-case-label {
  color: var(--color-muted);
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
  line-height: 1.5;
  text-transform: uppercase;
}

.case-label {
  margin-block-end: var(--space-2xs);
}

.case-hero h1 {
  font-size: var(--text-2xl);
}

.case-deck {
  max-width: var(--reading-width);
  margin-block-start: var(--space-xs);
  color: var(--color-ink);
  font-size: var(--text-md);
  line-height: 1.55;
}

.case-hero-aside {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-sm);
}

.case-facts {
  width: 100%;
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.case-fact {
  display: grid;
  grid-template-columns: 5.5rem minmax(0, 1fr);
  gap: var(--space-sm);
  padding-block: var(--space-2xs);
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.case-fact dt {
  color: var(--color-muted);
  font-size: var(--text-xs);
  text-transform: uppercase;
}

.case-fact dd {
  color: var(--color-ink);
}

.case-cover {
  overflow: hidden;
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-card);
  background: var(--color-paper-2);
}

.case-cover picture,
.case-cover img {
  width: 100%;
}

.case-cover img {
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: 50% 15%;
}

.case-cover--vine img {
  object-position: 50% 12%;
}

.case-cover--licto img {
  object-position: center;
}

.case-section > h2 {
  margin-block-end: var(--space-xs);
}

.case-content {
  display: grid;
  max-width: var(--reading-width);
  gap: var(--space-xs);
}

.case-content > p:first-child {
  color: var(--color-ink);
}

.constraint-list,
.shipped-list,
.evidence-list,
.freshness-steps {
  margin-block-start: var(--space-sm);
  border-block-start: var(--rule-hair) solid var(--color-rule);
  list-style: none;
}

.constraint-list li,
.shipped-list li,
.evidence-list li,
.freshness-steps li {
  padding-block: var(--space-xs);
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.system-panel {
  overflow: hidden;
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-card);
  background: var(--color-paper-2);
}

.system-panel-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-3xs);
  padding: var(--space-xs);
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.system-panel-header h3 {
  font-size: var(--text-base);
}

.system-flow {
  display: grid;
}

.flow-node {
  display: grid;
  gap: var(--space-3xs);
  padding: var(--space-xs);
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.flow-node:last-child {
  border-block-end: 0;
}

.flow-node strong {
  color: var(--color-ink);
  font-weight: 550;
}

.flow-node > span:last-child {
  color: var(--color-ink-2);
  font-size: var(--text-sm);
}

.state-comparison {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-sm);
}

.state-card {
  padding: var(--space-xs);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-card);
  background: var(--color-paper-2);
}

.state-card--live {
  border-color: var(--color-rule-2);
}

.state-card h3 {
  margin-block: var(--space-2xs);
}

.state-card-label {
  color: var(--color-accent);
  font-size: var(--text-xs);
  font-weight: 550;
  text-transform: uppercase;
}

.freshness-line {
  margin-block-start: var(--space-sm);
  color: var(--color-ink);
}

.decision-list {
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.decision-row {
  display: grid;
  gap: var(--space-3xs);
  padding-block: var(--space-xs);
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.decision-row dt {
  color: var(--color-ink);
  font-weight: 550;
}

.decision-tradeoff {
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.proof-grid {
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.proof-item {
  display: grid;
  gap: var(--space-3xs);
  padding-block: var(--space-xs);
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.proof-item strong {
  color: var(--color-ink);
  font-weight: 550;
}

.limits-panel {
  max-width: var(--reading-width);
  padding-block-start: var(--space-xs);
  border-block-start: var(--rule-fine) solid var(--color-accent);
}

.limits-panel h3 {
  margin-block-end: var(--space-2xs);
}

.role-statement {
  color: var(--color-ink);
}

.stack-line {
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.next-case {
  min-height: var(--space-3xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

/* 404 */
.not-found {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding-block: var(--space-2xl);
}

.not-found > div:first-child {
  display: grid;
  max-width: var(--reading-width);
  gap: var(--space-xs);
}

.error-code {
  order: -1;
  color: var(--color-accent);
  font-size: var(--text-xl);
  font-weight: 650;
}

/* Ft2 — inline footer */
.site-footer {
  margin-block-start: auto;
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.site-footer-inner,
.footer-meta {
  width: 100%;
  min-height: var(--space-3xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  margin: 0;
  padding-inline: var(--page-gutter);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.footer-meta.container {
  max-width: none;
}

.footer-meta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm) var(--space-lg);
}

.footer-meta a {
  min-width: var(--control-height);
  min-height: var(--control-height);
  display: inline-flex;
  align-items: center;
  text-decoration-color: var(--color-accent);
  white-space: nowrap;
}

@media (hover: hover) and (pointer: fine) {
  .brand:hover,
  .inline-link:hover,
  .arrow-link:hover {
    color: var(--color-accent);
  }

  .theme-toggle:hover {
    background: var(--color-paper-3);
    color: var(--color-ink);
  }

  .button--primary:hover {
    background: var(--color-focus);
  }

  .button--secondary:hover {
    background: var(--color-rule-2);
  }

  .compact-card:hover {
    border-color: var(--color-rule-2);
  }

  .compact-card:hover .card-arrow,
  .compact-card:focus-within .card-arrow {
    opacity: 1;
  }

  .inline-link:hover,
  .arrow-link:hover {
    text-decoration-thickness: var(--rule-fine);
  }

  .footer-meta a:hover {
    color: var(--color-accent);
  }
}

@media (min-width: 30rem) {
  .profile-intro h1 {
    font-size: var(--text-xl);
  }
}

@media (min-width: 40rem) {
  .page-main,
  main > .container {
    padding-block-start: var(--space-2xl);
    padding-block-end: var(--space-3xl);
  }

  .project-list,
  .state-comparison {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .case-cover img {
    aspect-ratio: 16 / 10;
  }

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

  .flow-node:nth-child(odd) {
    border-inline-end: var(--rule-hair) solid var(--color-rule);
  }

  .flow-node:nth-last-child(-n + 2) {
    border-block-end: 0;
  }
}

@media (max-width: 24rem) {
  .brand-context {
    display: none;
  }

  .practice-list > div,
  .case-fact {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-3xs);
  }

  .next-case {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding-block: var(--space-sm);
  }

  .footer-meta {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding-block: var(--space-sm);
  }
}

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

@media (forced-colors: active) {
  :focus-visible,
  .compact-card:focus-within {
    outline-color: CanvasText;
  }

  .badge,
  .identity-mark {
    border: var(--rule-hair) solid CanvasText;
  }
}