:root {
  --bg: #f3f0e8;
  --bg-2: #e8e3d6;
  --ink: #161513;
  --ink-soft: #3c3933;
  --line: #b7b19f;
  --accent: #9a3412;
  --accent-hover: #7c2d12;
  --focus: #9a3412;
  --rail: 3.25rem;
  --header: 4.5rem;
  --gutter: clamp(1.25rem, 3vw, 2.5rem);
  --max: 88rem;
  --font: "IBM Plex Mono", ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;
}

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

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

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-snap-type: y mandatory;
  }

  .panel {
    opacity: 0;
    transform: translateY(1.5rem);
    transition:
      opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
      transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  }

  .panel.is-inview {
    opacity: 1;
    transform: none;
  }

  .scroll-hint {
    animation: hint-bob 2.2s ease-in-out infinite;
  }
}

@keyframes hint-bob {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(0.35rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
    scroll-snap-type: none;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 1.0125rem;
  line-height: 1.65;
  font-weight: 400;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

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

.skip {
  position: absolute;
  left: 0.75rem;
  top: -4rem;
  z-index: 20;
  background: var(--ink);
  color: var(--bg);
  padding: 0.5rem 0.85rem;
}

.skip:focus {
  top: 0.75rem;
}

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

.frame {
  position: relative;
  min-height: 100vh;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--rail);
}

.grid-lines {
  pointer-events: none;
  position: absolute;
  inset: 0 var(--rail);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  z-index: 0;
}

.grid-lines span {
  border-left: 1px solid var(--line);
}

.grid-lines span:last-child {
  border-right: 1px solid var(--line);
}

.top,
.rail,
main,
.scroll-hint {
  position: relative;
  z-index: 1;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: var(--header);
  padding: 0.85rem var(--gutter);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 5;
}

.mark {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.mark:hover {
  color: var(--accent-hover);
}

.mark-logo {
  display: block;
  flex: none;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  object-fit: cover;
}

@media (max-width: 959px) {
  .mark-logo {
    width: 2.4rem;
    height: 2.4rem;
  }
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.35rem 1.35rem;
}

.nav a {
  color: var(--ink);
  text-decoration: none;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.35rem 0;
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
}

.nav a span {
  color: var(--accent);
  margin-right: 0.35rem;
}

.nav a:hover,
.nav a.is-active {
  text-decoration: underline;
  text-decoration-thickness: 1px;
}

.rail {
  position: fixed;
  width: var(--rail);
  display: flex;
  z-index: 4;
}

.rail a,
.rail p {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
}

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

.rail-left {
  left: calc((100vw - min(100vw, var(--max))) / 2);
  bottom: 1.5rem;
  top: auto;
  height: auto;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  gap: 1.35rem;
}

.rail-right {
  right: calc((100vw - min(100vw, var(--max))) / 2);
  top: 50%;
  transform: translateY(-50%);
  height: auto;
  align-items: center;
  justify-content: center;
}

main {
  padding: 0;
}

.panel {
  padding: 4.5rem var(--gutter) 5rem;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: var(--header);
  scroll-snap-align: start;
  scroll-snap-stop: always;
  min-height: calc(100svh - var(--header));
  box-sizing: border-box;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 1.25rem 1.5rem;
  min-height: calc(100svh - var(--header));
  align-items: center;
  align-content: center;
  padding-top: 3rem;
  padding-bottom: 3.5rem;
}

.hero .section-head {
  grid-column: 1 / -1;
  margin-bottom: 0.25rem;
}

.hero .section-head h1 {
  margin: 0;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.kicker {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  margin: 0 0 1.4rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
}

.kicker-index {
  font-size: clamp(3.4rem, 8vw, 6.4rem);
  color: var(--ink);
}

.kicker-total {
  font-size: clamp(1.2rem, 2.4vw, 1.7rem);
  font-weight: 500;
  color: var(--ink-soft);
}

.eyebrow {
  margin: 0 0 0.65rem;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}

.slide h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.7rem, 3.4vw, 2.55rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  font-weight: 700;
}

.slide p {
  margin: 0 0 1.5rem;
  max-width: 36rem;
  color: var(--ink);
}

.more {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
  min-height: 2.75rem;
}

.more::before {
  content: "";
  width: 2.4rem;
  height: 1px;
  background: var(--ink);
}

.more:hover {
  color: var(--accent);
}

.more:hover::before {
  background: var(--accent);
}

.hero-controls {
  display: flex;
  gap: 0.5rem;
  margin-top: 2.2rem;
}

.ctrl {
  width: 2.75rem;
  height: 2.75rem;
  min-width: 2.75rem;
  min-height: 2.75rem;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  font-family: inherit;
  font-size: 1.1rem;
  cursor: pointer;
  touch-action: manipulation;
}

.ctrl:hover {
  background: var(--ink);
  color: var(--bg);
}

.hero-figure {
  min-height: 18rem;
  display: grid;
  place-items: center;
  background:
    linear-gradient(var(--line) 1px, transparent 1px) 0 0 / 100% 24px,
    linear-gradient(90deg, var(--line) 1px, transparent 1px) 0 0 / 24px 100%;
  background-color: var(--bg-2);
  border: 1px solid var(--line);
}

.drawing {
  width: min(100%, 32rem);
  height: auto;
  color: var(--ink);
  font-family: var(--font);
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 2.4rem;
}

.section-head .num {
  margin: 0;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.08em;
}

.section-head h2 {
  margin: 0;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(16rem, 0.8fr);
  gap: 2.5rem 2rem;
}

.lead {
  font-size: 1.12rem;
  font-weight: 500;
  line-height: 1.55;
}

.prose p {
  margin: 0 0 1.15rem;
  max-width: 42rem;
  color: var(--ink);
}

.meta,
.stack dl,
.contact-list {
  margin: 0;
}

.meta {
  display: grid;
  gap: 1.15rem;
  align-content: start;
  padding-top: 0.2rem;
}

.meta div,
.stack dl div,
.contact-list li {
  display: grid;
  gap: 0.2rem;
}

.meta dt,
.stack dt,
.contact-list span {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  font-weight: 600;
}

.meta dd,
.stack dd {
  margin: 0;
}

.stack {
  margin-top: 3.2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.stack h3 {
  margin: 0 0 1.2rem;
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.stack dl {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem 2rem;
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.timeline li {
  display: grid;
  grid-template-columns: 12rem minmax(0, 1fr);
  gap: 1rem 2rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--line);
}

.timeline li:last-child {
  border-bottom: 1px solid var(--line);
}

.timeline .when {
  margin: 0;
  font-weight: 600;
  color: var(--accent);
}

.timeline h3 {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
}

.timeline p {
  margin: 0 0 0.55rem;
  max-width: 40rem;
}

.timeline .where {
  color: var(--ink-soft);
  margin-bottom: 0;
}

.contact-list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 1.2rem;
}

.contact-list a {
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
  word-break: break-word;
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
}

.contact-list a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.scroll-hint {
  display: none;
}

.mobile-social {
  display: none;
}

@media (min-width: 960px) {
  .scroll-hint {
    display: block;
    position: fixed;
    right: calc((100vw - min(100vw, var(--max))) / 2 + var(--rail) + var(--gutter));
    bottom: 1.4rem;
    margin: 0;
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--ink);
    z-index: 4;
    transition: opacity 0.25s ease;
  }

  .scroll-hint.is-hidden {
    opacity: 0;
    pointer-events: none;
  }

  .scroll-hint::before {
    content: "";
    display: inline-block;
    width: 1px;
    height: 1.6rem;
    margin-right: 0.6rem;
    background: var(--ink-soft);
    vertical-align: middle;
  }
}

@media (max-width: 959px) {
  :root {
    --header: 5.5rem;
    --rail: 0;
  }

  html {
    scroll-snap-type: y proximity;
  }

  @media (prefers-reduced-motion: reduce) {
    html {
      scroll-snap-type: none;
    }
  }

  .frame {
    padding: 0;
  }

  .grid-lines {
    inset: 0;
    grid-template-columns: 1fr 1fr;
  }

  .rail {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: calc(100svh - 7rem);
    gap: 1.5rem;
  }

  .hero-figure {
    min-height: 14rem;
  }

  .split,
  .timeline li,
  .stack dl {
    grid-template-columns: 1fr;
  }

  .timeline .when {
    margin-bottom: 0.2rem;
  }

  .top {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.65rem;
    padding: 0.85rem 1.15rem 0.75rem;
  }

  .nav {
    justify-content: flex-start;
    gap: 0.15rem 0.85rem;
    width: 100%;
  }

  .nav a {
    font-size: 0.72rem;
    min-height: 2.5rem;
  }

  .panel {
    padding: 2.75rem 1.15rem 3.2rem;
    scroll-margin-top: 6.5rem;
  }

  .mobile-social {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.25rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--line);
  }

  .mobile-social a {
    color: var(--ink);
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-decoration: none;
    font-weight: 600;
    min-height: 2.75rem;
    display: inline-flex;
    align-items: center;
  }

  .mobile-social a:hover {
    color: var(--accent);
    text-decoration: underline;
  }
}

@media (forced-colors: active) {
  .grid-lines {
    display: none;
  }

  .hero-figure {
    background: none;
  }

  a,
  .more,
  .nav a,
  .contact-list a {
    text-decoration: underline;
  }
}