@font-face { font-family: 'Lexend Exa'; font-style: normal; font-weight: 100; font-display: swap; src: url("/assets/fonts/lexend-exa-latin-100-normal.woff2") format("woff2"); }
@font-face { font-family: 'Lexend Exa'; font-style: normal; font-weight: 200; font-display: swap; src: url("/assets/fonts/lexend-exa-latin-200-normal.woff2") format("woff2"); }
@font-face { font-family: 'Lexend Exa'; font-style: normal; font-weight: 300; font-display: swap; src: url("/assets/fonts/lexend-exa-latin-300-normal.woff2") format("woff2"); }
@font-face { font-family: 'Lexend Exa'; font-style: normal; font-weight: 400; font-display: swap; src: url("/assets/fonts/lexend-exa-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: 'Lexend Exa'; font-style: normal; font-weight: 500; font-display: swap; src: url("/assets/fonts/lexend-exa-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: 'Lexend Exa'; font-style: normal; font-weight: 600; font-display: swap; src: url("/assets/fonts/lexend-exa-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: 'Lexend Exa'; font-style: normal; font-weight: 700; font-display: swap; src: url("/assets/fonts/lexend-exa-latin-700-normal.woff2") format("woff2"); }
@font-face { font-family: 'Lexend Exa'; font-style: normal; font-weight: 800; font-display: swap; src: url("/assets/fonts/lexend-exa-latin-800-normal.woff2") format("woff2"); }
@font-face { font-family: 'Lexend Exa'; font-style: normal; font-weight: 900; font-display: swap; src: url("/assets/fonts/lexend-exa-latin-900-normal.woff2") format("woff2"); }
@font-face { font-family: 'Literata'; font-style: italic; font-weight: 200; font-display: swap; src: url("/assets/fonts/literata-latin-200-italic.woff2") format("woff2"); }
@font-face { font-family: 'Literata'; font-style: normal; font-weight: 200; font-display: swap; src: url("/assets/fonts/literata-latin-200-normal.woff2") format("woff2"); }
@font-face { font-family: 'Literata'; font-style: italic; font-weight: 300; font-display: swap; src: url("/assets/fonts/literata-latin-300-italic.woff2") format("woff2"); }
@font-face { font-family: 'Literata'; font-style: normal; font-weight: 300; font-display: swap; src: url("/assets/fonts/literata-latin-300-normal.woff2") format("woff2"); }
@font-face { font-family: 'Literata'; font-style: italic; font-weight: 400; font-display: swap; src: url("/assets/fonts/literata-latin-400-italic.woff2") format("woff2"); }
@font-face { font-family: 'Literata'; font-style: normal; font-weight: 400; font-display: swap; src: url("/assets/fonts/literata-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: 'Literata'; font-style: italic; font-weight: 500; font-display: swap; src: url("/assets/fonts/literata-latin-500-italic.woff2") format("woff2"); }
@font-face { font-family: 'Literata'; font-style: normal; font-weight: 500; font-display: swap; src: url("/assets/fonts/literata-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: 'Literata'; font-style: italic; font-weight: 600; font-display: swap; src: url("/assets/fonts/literata-latin-600-italic.woff2") format("woff2"); }
@font-face { font-family: 'Literata'; font-style: normal; font-weight: 600; font-display: swap; src: url("/assets/fonts/literata-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: 'Literata'; font-style: italic; font-weight: 700; font-display: swap; src: url("/assets/fonts/literata-latin-700-italic.woff2") format("woff2"); }
@font-face { font-family: 'Literata'; font-style: normal; font-weight: 700; font-display: swap; src: url("/assets/fonts/literata-latin-700-normal.woff2") format("woff2"); }
@font-face { font-family: 'Literata'; font-style: italic; font-weight: 800; font-display: swap; src: url("/assets/fonts/literata-latin-800-italic.woff2") format("woff2"); }
@font-face { font-family: 'Literata'; font-style: normal; font-weight: 800; font-display: swap; src: url("/assets/fonts/literata-latin-800-normal.woff2") format("woff2"); }
@font-face { font-family: 'Literata'; font-style: italic; font-weight: 900; font-display: swap; src: url("/assets/fonts/literata-latin-900-italic.woff2") format("woff2"); }
@font-face { font-family: 'Literata'; font-style: normal; font-weight: 900; font-display: swap; src: url("/assets/fonts/literata-latin-900-normal.woff2") format("woff2"); }
:root {
  --bg-light-base: #e3e1dd;
  --fg-light-base-body: #3b3835;
  --fg-light-base-heading: #282624;
  --fg-light-base-muted: #57514b;
  --fg-light-base-link: #5a4636;
  --fg-light-base-inverse: #282624;
  --bg-light-card: #d6cdc2;
  --fg-light-card-body: #3b3835;
  --fg-light-card-heading: #282624;
  --fg-light-card-muted: #57514b;
  --fg-light-card-link: #5a4636;
  --fg-light-card-inverse: #282624;
  --bg-light-elevated: #f2f0ec;
  --fg-light-elevated-body: #3b3835;
  --fg-light-elevated-heading: #282624;
  --fg-light-elevated-muted: #57514b;
  --fg-light-elevated-link: #5a4636;
  --fg-light-elevated-inverse: #282624;
  --brand-light-accent: #5a4636;
  --brand-light-accent-hover: #3d2f25;
  --brand-light-on-accent: #f2f0ec;
  --focus-light-ring: #5a4636;
  --border-light-default: #756d65;
  --border-light-subtle: #c7beb2;
}
.bg-surface-base { background: var(--bg-light-base); --fg-body: var(--fg-light-base-body); --fg-heading: var(--fg-light-base-heading); --fg-muted: var(--fg-light-base-muted); --fg-link: var(--fg-light-base-link); --fg-inverse: var(--fg-light-base-inverse); }
.bg-surface-card { background: var(--bg-light-card); --fg-body: var(--fg-light-card-body); --fg-heading: var(--fg-light-card-heading); --fg-muted: var(--fg-light-card-muted); --fg-link: var(--fg-light-card-link); --fg-inverse: var(--fg-light-card-inverse); }
.bg-surface-elevated { background: var(--bg-light-elevated); --fg-body: var(--fg-light-elevated-body); --fg-heading: var(--fg-light-elevated-heading); --fg-muted: var(--fg-light-elevated-muted); --fg-link: var(--fg-light-elevated-link); --fg-inverse: var(--fg-light-elevated-inverse); }
.text-role-body { color: var(--fg-body); overflow-wrap: anywhere; }
.text-role-heading { color: var(--fg-heading); overflow-wrap: anywhere; }
.text-role-muted { color: var(--fg-muted); }
.text-role-link { color: var(--fg-link); }
.text-role-inverse { color: var(--fg-inverse); }
.text-role-link { text-decoration: underline; }
.text-role-link:hover { color: var(--brand-light-accent-hover); }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--focus-light-ring); outline-offset: 2px; }
img { max-width: 100%; height: auto; }
.site-logo { max-width: 100%; height: auto; }
.site-menu > summary { list-style: none; cursor: pointer; }
.site-menu > summary::-webkit-details-marker { display: none; }
:where(section[data-section][style]) { background-size: cover; background-position: center; padding: clamp(1.5rem, 4vw, 3rem); }
.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { position: static; padding: 0.25rem 0.5rem; outline: 2px solid var(--focus-light-ring); }

/* Stone planes: stone gray, warm taupe and charcoal ink, wide light display type, slow vertical pacing. */

:root {
  --stone: var(--bg-light-base);
  --taupe: var(--bg-light-card);
  --pale: var(--bg-light-elevated);
  --charcoal: var(--fg-light-base-heading);
  --line: var(--border-light-default);
  --line-soft: var(--border-light-subtle);
  --accent: var(--brand-light-accent);
  --accent-deep: var(--brand-light-accent-hover);
  --on-accent: var(--brand-light-on-accent);
  --wide: 'Lexend Exa', 'Segoe UI', system-ui, sans-serif;
  --text: 'Literata', Georgia, 'Times New Roman', serif;
  --measure: 36rem;
  --gutter: clamp(1rem, 5vw, 3.5rem);
  --pace: clamp(4rem, 10vw, 8rem);
  --rail: 16rem;
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: clip;
  font-family: var(--text);
  font-size: 1.0625rem;
  line-height: 1.7;
}

h1, h2, h3 {
  font-family: var(--wide);
  font-weight: 300;
  letter-spacing: 0.01em;
  line-height: 1.2;
  margin: 0;
  text-wrap: balance;
}

p, ul, ol { margin: 0; }

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

a.text-role-link { text-decoration-thickness: 1px; text-underline-offset: 0.22em; }
a.text-role-link:hover { text-decoration-thickness: 2px; }

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

.skip-link {
  position: absolute;
  left: -100vw;
  top: 0.75rem;
  z-index: 30;
  padding: 0.6rem 1rem;
  background: var(--pale);
}
.skip-link:focus { left: 0.75rem; }

/* ---------- chrome ---------- */

/* Phone and tablet: a pinned stone bar. Desktop: a fixed left rail (see the 64rem query). */
.plane-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--stone);
  border-bottom: 1px solid var(--line-soft);
}

.plane-bar {
  max-width: 76rem;
  margin: 0 auto;
  padding: 1.1rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.plane-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  min-height: 44px;
  text-decoration: none;
}

.plane-brand .site-logo { width: 2.25rem; height: 2.25rem; flex: none; }

.plane-brand-name {
  font-family: var(--wide);
  font-weight: 300;
  font-size: 0.95rem;
  line-height: 1.3;
  max-width: 18rem;
}

.plane-rail { display: none; }

.site-menu > summary {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  min-height: 44px;
  padding: 0 1.1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  list-style: none;
  font-family: var(--wide);
  font-weight: 300;
  font-size: 0.9rem;
  white-space: nowrap;
  color: var(--charcoal);
}
.site-menu > summary::-webkit-details-marker { display: none; }

.menu-icon {
  position: relative;
  width: 1.1rem;
  height: 0.55rem;
  border-top: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
}

.site-menu[open] > summary { background: var(--pale); }

/* Open menu: a full-width stone sheet under the bar, large numbered wide-set links. */
.site-menu > ul {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  min-height: calc(100dvh - 5rem);
  max-height: calc(100dvh - 5rem);
  overflow-y: auto;
  margin: 0;
  padding: 2.5rem var(--gutter) 3rem;
  list-style: none;
  counter-reset: sheet;
  background: var(--stone);
  border-top: 0.4rem solid var(--charcoal);
}

.site-menu > ul li { counter-increment: sheet; }

.site-menu > ul a {
  display: grid;
  grid-template-columns: 2.75rem minmax(0, 1fr);
  align-items: baseline;
  min-height: 44px;
  padding: 1.1rem 0;
  font-family: var(--wide);
  font-weight: 200;
  font-size: clamp(1.35rem, 6vw, 1.75rem);
  line-height: 1.25;
  text-decoration: none;
}
.site-menu > ul a::before {
  content: counter(sheet, decimal-leading-zero);
  font-size: 0.8rem;
  font-weight: 300;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
}
.site-menu > ul a:hover,
.site-menu > ul a:focus-visible { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 0.25em; }

.plane-page { flex: 1 0 auto; }

.breadcrumbs {
  max-width: 76rem;
  margin: 0 auto;
  padding: 0.5rem var(--gutter) 0;
  font-size: 0.9rem;
}
.breadcrumbs ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.2rem 0.6rem; }
.breadcrumbs li + li::before { content: "/"; margin-right: 0.6rem; color: var(--line); }

.plane-footer { margin-top: auto; }

.plane-footer-inner {
  max-width: 76rem;
  margin: 0 auto;
  padding: 3.5rem var(--gutter) 3rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.25rem 2rem;
  align-items: start;
}

.plane-footer-line {
  font-family: var(--wide);
  font-weight: 300;
  font-size: 1.05rem;
  line-height: 1.5;
  max-width: 30rem;
}

.plane-footer-links { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.35rem; }
.plane-footer-links a { display: inline-block; min-height: 44px; padding: 0.55rem 0; }
.plane-footer-name { grid-column: 1 / -1; font-size: 0.9rem; }

/* ---------- shared prose ---------- */

.prose { max-width: var(--measure); }
.prose > * + * { margin-top: 1.1em; }
.prose h2 { font-size: clamp(1.3rem, 2.4vw, 1.6rem); color: var(--fg-heading); margin-top: 2.6em; }
.prose h2:first-child { margin-top: 0; }
.prose h2[id], .prose h3[id] { scroll-margin-top: 6rem; }
.prose h3 { font-size: 1.15rem; color: var(--fg-heading); margin-top: 2em; }
.prose ul, .prose ol { padding-left: 1.2rem; }
.prose li + li { margin-top: 0.5em; }
.prose figure { margin: 2.5rem 0; }
.prose section[data-section][style] {
  margin-top: 3rem;
  padding: clamp(3rem, 8vw, 6rem) clamp(1rem, 4vw, 2.5rem) 0;
  background-size: cover;
  background-position: center;
}
.prose section[data-section][style] > .bg-surface-card { padding: clamp(1.5rem, 4vw, 2.5rem); }
.prose section[data-section][style] > .bg-surface-card > * + * { margin-top: 1em; }
.prose > figure:first-child { margin-top: 0; }

/* Full-width stone breaks before each section heading (article idea). */
.prose-breaks h2 { margin-top: 0; }
.prose-breaks h2::before {
  content: "";
  display: block;
  height: clamp(2.5rem, 6vw, 4rem);
  margin: 3.5rem 0 3rem;
  background: var(--stone);
  box-shadow: 0 0 0 100vmax var(--stone);
  clip-path: inset(0 -100vmax);
}
.prose-breaks h2:first-child::before { margin-top: 0; }

/* ---------- home ---------- */

.home-hero {
  position: relative;
  padding-bottom: 3rem;
}

.home-hero-inner {
  position: relative;
  width: 100%;
  max-width: 76rem;
  margin: 0 auto;
  padding: var(--pace) var(--gutter);
}

.home-title h1 {
  font-size: 0.95rem;
  font-weight: 300;
  color: var(--fg-muted);
}

.home-lead {
  margin-top: 2.5rem;
  max-width: 15ch;
  font-family: var(--wide);
  font-weight: 200;
  font-size: clamp(2.1rem, 6.2vw, 4.9rem);
  line-height: 1.12;
  letter-spacing: 0.005em;
  text-wrap: balance;
}

.home-line { margin-top: 2.25rem; max-width: 30rem; font-size: 1.15rem; }
.home-line-quiet { margin-top: 0.75rem; font-size: 1rem; }

.home-steps { max-width: 76rem; margin: 0 auto; padding: 0 var(--gutter); position: relative; z-index: 1; }

.home-steps-list {
  list-style: none;
  margin: -3rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: end;
}

.home-step { display: flex; align-items: flex-end; padding: 1.75rem 1.5rem; }
.home-step-1 { min-height: 9rem; }
.home-step-2 { min-height: 12.5rem; }
.home-step-3 { min-height: 16rem; border-top: 0.4rem solid var(--charcoal); }

.home-step-link {
  font-family: var(--wide);
  font-weight: 300;
  font-size: 1.05rem;
  line-height: 1.4;
  min-height: 44px;
  display: inline-flex;
  align-items: flex-end;
}

.home-read { padding: var(--pace) var(--gutter) calc(var(--pace) * 1.2); }

.home-read .home-read-inner { max-width: calc(76rem - 2 * var(--gutter)); margin: 0 auto; }
.home-read-inner > :not(figure) { max-width: var(--measure); }

/* Hero photo: an arched, contoured cutout set on a stone plane. */
.home-read .photo-hero {
  float: right;
  width: min(42%, 24rem);
  margin: 0 0 2.5rem 3rem;
  padding: 1.5rem 1.5rem 0;
  background: var(--stone);
}
.home-read .photo-hero img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 999px 999px 0 0;
}

/* ---------- topic hub ---------- */

.hub-head { padding: calc(var(--pace) * 0.7) 0 calc(var(--pace) * 1.1); }
.hub-title { max-width: 76rem; margin: 0 auto; padding: 0 var(--gutter); }
.hub-title h1 { max-width: 22ch; font-weight: 200; font-size: clamp(1.9rem, 4.6vw, 3.4rem); line-height: 1.15; }

.hub-planes {
  max-width: 76rem;
  margin: calc(var(--pace) * -0.6) auto 0;
  padding: 0 var(--gutter) var(--pace);
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  align-items: start;
}

.hub-plane { padding: clamp(1.75rem, 4vw, 3.5rem); }
.hub-plane-reads { margin-top: clamp(3rem, 9vw, 7rem); position: sticky; top: 1.5rem; }

.hub-reads-title { font-size: 1.1rem; }
.hub-reads ul { list-style: none; margin: 1.5rem 0 0; padding: 0; }
.hub-reads li { border-top: 1px solid var(--line-soft); }
.hub-reads li:last-child { border-bottom: 1px solid var(--line-soft); }
.hub-reads a { display: block; min-height: 44px; padding: 0.95rem 0; line-height: 1.45; }

/* ---------- article ---------- */

.article { padding-bottom: var(--pace); }
.article-head { padding: calc(var(--pace) * 0.7) var(--gutter) var(--pace); }
.article-title { max-width: 40rem; margin: 0 auto; }
.article-title h1 { font-weight: 200; font-size: clamp(1.8rem, 4.2vw, 3rem); line-height: 1.18; }

.article-column {
  margin: 0 auto;
  padding: var(--pace) var(--gutter) 0;
  max-width: calc(40rem + 2 * var(--gutter));
  line-height: 1.95;
}
.article-column > * + * { margin-top: 1.35em; }
.article-column h2 { color: var(--fg-muted); font-weight: 300; }

/* ---------- about ---------- */

.about { padding: var(--pace) var(--gutter) calc(var(--pace) * 1.4); }
.about-head { max-width: 64rem; margin: 0 auto; }
.about-title h1 { font-size: 0.95rem; font-weight: 300; }
.about-statement {
  margin-top: 2.5rem;
  max-width: 18ch;
  font-family: var(--wide);
  font-weight: 200;
  font-size: clamp(2rem, 5.6vw, 4.2rem);
  line-height: 1.14;
}

.about-column { margin: calc(var(--pace) * 1.2) auto 0; max-width: 38rem; }
.prose-spaced h2 { margin-top: 4.5em; }
.prose-spaced ul { list-style: none; padding: 0; margin-top: 3rem; }
.prose-spaced ul li {
  margin-top: 3.5rem;
  padding-left: 1.5rem;
  border-left: 1px solid var(--line);
  font-size: 1.15rem;
}
.prose-spaced ul li:first-child { margin-top: 0; }

/* ---------- contact ---------- */

.contact { padding: calc(var(--pace) * 0.5) var(--gutter) var(--pace); }

.contact-split {
  max-width: calc(76rem - 2 * var(--gutter));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.contact-info {
  padding: clamp(1.75rem, 4vw, 3.5rem);
  border-top: 0.5rem solid var(--charcoal);
}
.contact-title h1 { font-weight: 200; font-size: clamp(1.9rem, 4vw, 3rem); }
.contact-prose { margin-top: 2.5rem; }

.contact-form-col {
  padding: clamp(1.75rem, 4vw, 3.5rem);
  box-shadow: inset 1px 0 0 var(--line-soft), -1.25rem 0 2.5rem -2rem rgba(40, 38, 36, 0.35);
}
.contact-form-title { font-size: 1.2rem; }

.contact-form { margin-top: 2rem; display: grid; gap: 1.4rem; }
.field { display: grid; gap: 0.45rem; }
.field label { font-family: var(--wide); font-weight: 300; font-size: 0.9rem; }
.field-optional { font-size: 0.85rem; }

.field input,
.field textarea {
  width: 100%;
  min-height: 48px;
  padding: 0.7rem 0.85rem;
  font: inherit;
  color: var(--charcoal);
  background: var(--pale);
  border: 1px solid var(--line);
  border-radius: 0;
}
.field textarea { resize: vertical; }
.field input:focus-visible,
.field textarea:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.contact-send {
  justify-self: start;
  min-height: 48px;
  padding: 0 2rem;
  font-family: var(--wide);
  font-weight: 400;
  font-size: 0.95rem;
  color: var(--on-accent);
  background: var(--accent);
  border: 0;
  cursor: pointer;
}
.contact-send:hover { background: var(--accent-deep); }

/* ---------- thank you / not found ---------- */

.thanks { padding: var(--pace) var(--gutter); }

.thanks-panel {
  max-width: 44rem;
  margin: 0 auto;
  padding: clamp(2rem, 6vw, 4.5rem);
}

.thanks-title h1 { font-weight: 200; font-size: clamp(1.8rem, 4.5vw, 3rem); }
.thanks-prose { margin-top: 2.5rem; }
.thanks-home { margin-top: 3rem; }
.thanks-link {
  display: inline-block;
  min-height: 44px;
  padding: 0.6rem 0;
  font-family: var(--wide);
  font-weight: 300;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.45em;
}

/* ---------- the one motion: topic steps rise once ---------- */

@media (prefers-reduced-motion: no-preference) {
  .home-step { animation: plane-rise 1.4s cubic-bezier(0.2, 0.7, 0.2, 1) both; }
  .home-step-2 { animation-delay: 0.15s; }
  .home-step-3 { animation-delay: 0.3s; }
}

@keyframes plane-rise {
  from { transform: translateY(1.5rem); }
  to { transform: none; }
}

/* ---------- narrow screens ---------- */

@media (max-width: 52rem) {
  .plane-brand-name { font-size: 0.8rem; }
  .plane-brand .site-logo { width: 2rem; height: 2rem; }
  .site-menu > summary { padding: 0 0.85rem; }

  .home-steps-list { grid-template-columns: minmax(0, 1fr); margin-top: -2rem; }
  .home-step { min-height: 0; }
  .home-step-1 { margin-left: 0; }
  .home-step-2 { margin-left: 8%; }
  .home-step-3 { margin-left: 16%; }

  .home-read .photo-hero { float: none; width: 100%; max-width: 22rem; margin: 0 0 2.5rem; }

  .hub-planes { grid-template-columns: minmax(0, 1fr); }
  .hub-plane-reads { margin-top: 0; position: static; }

  .contact-split { grid-template-columns: minmax(0, 1fr); }
  .contact-form-col { box-shadow: inset 0 1px 0 var(--line-soft); }

  .plane-footer-inner { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- desktop: fixed left side rail ---------- */

@media (min-width: 64rem) {
  .plane-header {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    width: var(--rail);
    overflow-y: auto;
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }

  .plane-bar {
    max-width: none;
    min-height: 100%;
    margin: 0;
    padding: 2.5rem 1.75rem;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 3.5rem;
  }

  .plane-brand { flex-direction: column; align-items: flex-start; gap: 1.1rem; }
  .plane-brand .site-logo { width: 2.75rem; height: 2.75rem; }
  .plane-brand-name { font-size: 0.9rem; max-width: 12rem; }

  .plane-nav { display: none; }
  .plane-rail { display: block; }

  .plane-rail ul { list-style: none; margin: 0; padding: 0; }
  .plane-rail li + li { margin-top: 0.35rem; }
  .plane-rail a {
    display: flex;
    align-items: center;
    min-height: 44px;
    padding: 0.55rem 0 0.55rem 1rem;
    border-left: 1px solid var(--line-soft);
    font-family: var(--wide);
    font-weight: 300;
    font-size: 0.85rem;
    line-height: 1.4;
    text-decoration: none;
  }
  .plane-rail a:hover { border-left: 3px solid var(--charcoal); padding-left: calc(1rem - 2px); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 0.25em; }

  .plane-page,
  .plane-footer { margin-left: var(--rail); }
}