/* ==========================================================================
   UPRIGHT NOTES / wallingtonosteopaths.co.uk
   Editorial system for a British reading site about backs, posture, movement.

   Chord: cool chalk field, deep petrol ink, jade, one chalk-yellow highlighter.
   Headings in a grotesque system sans, text in system sans, serif kept for
   standfirsts and pull quotes, monospace for measured labels and numbers.
   No web fonts, no scripts, no third party requests of any kind.
   ========================================================================== */

:root {
  /* surfaces */
  --field:        #edf0ee;
  --field-sunk:   #e3e8e5;
  --card:         #ffffff;
  --deep:         #0e1c1f;
  --deep-soft:    #16292d;

  /* type tones */
  --tone-950:     #0e1c1f;
  --tone-800:     #1e363b;
  --tone-600:     #4b6469;
  --tone-400:     #7f959a;

  /* accents */
  --jade:         #14675b;
  --jade-deep:    #0c4740;
  --jade-lift:    #1d8a78;
  --jade-wash:    #dcece7;
  --chalk-hi:     #f2ce4e;
  --clay:         #b0492f;

  /* structure */
  --rule:         #d2dad7;
  --rule-soft:    #e2e8e5;
  --rule-dark:    #2c4348;
  --corner:       3px;
  --lift:         0 1px 0 rgba(14, 28, 31, .04), 0 18px 34px -26px rgba(14, 28, 31, .55);
  --lift-hi:      0 1px 0 rgba(14, 28, 31, .06), 0 26px 44px -26px rgba(14, 28, 31, .55);

  /* type faces, system only */
  --face-head:  "Avenir Next", Avenir, "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --face-text:  system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --face-quote: Charter, "Bitstream Charter", "Sitka Text", Cambria, "Palatino Linotype", Georgia, serif;
  --face-num:   ui-monospace, "SF Mono", SFMono-Regular, "Cascadia Mono", "Segoe UI Mono", Menlo, Consolas, monospace;
}

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

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

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

body {
  margin: 0;
  background: var(--field);
  color: var(--tone-800);
  font-family: var(--face-text);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
  background: transparent;
  font-size: .8rem;
  color: var(--tone-600);
}

a { color: var(--jade); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--jade-deep); }

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

::selection { background: var(--chalk-hi); color: var(--deep); }

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 2.6rem 0;
}

/* --------------------------------------------------------------------------
   headings
   -------------------------------------------------------------------------- */

h1, h2, h3, h4 {
  font-family: var(--face-head);
  color: var(--tone-950);
  line-height: 1.13;
  letter-spacing: -.018em;
  margin: 0 0 .55em;
  font-weight: 700;
  text-wrap: balance;
}

h1 { font-size: clamp(2.05rem, 6.2vw, 3.5rem); letter-spacing: -.026em; }
h2 { font-size: clamp(1.5rem, 3.6vw, 2.15rem); }
h3 { font-size: clamp(1.14rem, 2.3vw, 1.36rem); letter-spacing: -.01em; }
h4 { font-size: 1.02rem; letter-spacing: 0; }

p { margin: 0 0 1.15em; }
p:last-child { margin-bottom: 0; }

strong, b { font-weight: 650; color: var(--tone-950); }

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

.rail {
  width: 100%;
  max-width: 1160px;
  margin-inline: auto;
  padding-inline: 20px;
}

.rail--narrow { max-width: 748px; }
.rail--mid    { max-width: 940px; }

@media (min-width: 700px) {
  .rail { padding-inline: 34px; }
}

.skip-to {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 99;
  background: var(--deep);
  color: var(--field);
  padding: .7rem 1.1rem;
  font-weight: 650;
  text-decoration: none;
}
.skip-to:focus { left: 0; }

/* --------------------------------------------------------------------------
   masthead, deliberately not sticky, print logic
   -------------------------------------------------------------------------- */

.masthead {
  background: var(--field);
  border-bottom: 1px solid var(--rule);
}

.masthead-inner {
  display: flex;
  flex-direction: column;
  gap: .5rem;
  padding-block: 1rem .35rem;
}

@media (min-width: 860px) {
  .masthead-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    padding-block: 1.35rem 1.2rem;
  }
}

.sigil {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  text-decoration: none;
  color: var(--tone-950);
}

.sigil-mark { width: 34px; height: 34px; flex: 0 0 auto; }

.sigil-word {
  font-family: var(--face-head);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -.028em;
  line-height: 1;
}
.sigil-word b { color: var(--jade); font-weight: 700; }

.sigil-strap {
  display: none;
  font-family: var(--face-num);
  font-size: .66rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--tone-400);
  margin-left: .55rem;
  padding-left: .6rem;
  border-left: 1px solid var(--rule);
}
@media (min-width: 1040px) { .sigil-strap { display: inline; } }

.wayfinder {
  display: flex;
  gap: 1.35rem;
  overflow-x: auto;
  scrollbar-width: none;
  margin-inline: -20px;
  padding: .25rem 20px .7rem;
}
.wayfinder::-webkit-scrollbar { display: none; }

/* the strip scrolls sideways on small screens, so the last item fades
   out rather than looking like a truncation bug */
@media (max-width: 859px) {
  .wayfinder {
    -webkit-mask-image: linear-gradient(to right, #000 0 86%, transparent 100%);
    mask-image: linear-gradient(to right, #000 0 86%, transparent 100%);
  }
}

@media (min-width: 700px) { .wayfinder { margin-inline: 0; padding-inline: 0; } }

.wayfinder a {
  flex: 0 0 auto;
  font-family: var(--face-head);
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: -.005em;
  color: var(--tone-800);
  text-decoration: none;
  padding-bottom: .2rem;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}
.wayfinder a:hover { color: var(--jade); border-bottom-color: var(--jade-wash); }
.wayfinder a[aria-current] { color: var(--jade); border-bottom-color: var(--chalk-hi); }

/* --------------------------------------------------------------------------
   small editorial furniture
   -------------------------------------------------------------------------- */

.flag {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-family: var(--face-num);
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .17em;
  text-transform: uppercase;
  color: var(--jade);
  margin: 0 0 1rem;
}
.flag::before {
  content: "";
  width: 22px;
  height: 3px;
  background: var(--chalk-hi);
}

.standfirst {
  font-family: var(--face-quote);
  font-size: clamp(1.1rem, 2.3vw, 1.34rem);
  line-height: 1.55;
  color: var(--tone-600);
  max-width: 40ch;
  margin: 0 0 1.6rem;
}

.trail {
  font-family: var(--face-num);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--tone-400);
  margin: 0 0 1.4rem;
  text-transform: uppercase;
}
.trail a { color: var(--tone-600); text-decoration: none; }
.trail a:hover { color: var(--jade); text-decoration: underline; }
.trail span { padding: 0 .45rem; color: var(--rule); }

.pagemeta {
  font-family: var(--face-num);
  font-size: .72rem;
  letter-spacing: .05em;
  color: var(--tone-400);
  margin: 1.4rem 0 0;
}

.mark {
  background: linear-gradient(to top, rgba(242, 206, 78, .62) 0 .55em, transparent .55em);
  padding-inline: .08em;
}

/* graduated rule, the house motif */
.tick-rule {
  display: none;
  width: 3px;
  border-radius: 2px;
  background-image: repeating-linear-gradient(
    to bottom,
    var(--jade) 0 9px,
    var(--jade-wash) 9px 15px
  );
}
@media (min-width: 980px) { .tick-rule { display: block; } }

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

.btn-solid, .btn-line {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--face-head);
  font-size: .95rem;
  font-weight: 650;
  text-decoration: none;
  padding: .78rem 1.35rem;
  border-radius: var(--corner);
  border: 1px solid transparent;
  transition: transform .15s ease, background-color .15s ease, color .15s ease;
}

.btn-solid { background: var(--deep); color: var(--field); }
.btn-solid:hover { background: var(--jade-deep); color: #fff; transform: translateY(-1px); }

.btn-line { border-color: var(--tone-950); color: var(--tone-950); background: transparent; }
.btn-line:hover { background: var(--tone-950); color: var(--field); transform: translateY(-1px); }

.btn-row { display: flex; flex-wrap: wrap; gap: .7rem; }

/* on a narrow screen the pair reads better as two full width bars */
@media (max-width: 479px) {
  .btn-row .btn-solid, .btn-row .btn-line { flex: 1 1 100%; justify-content: center; }
}

/* --------------------------------------------------------------------------
   figures, never an empty grey square
   -------------------------------------------------------------------------- */

.figure-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--corner);
  background:
    radial-gradient(120% 90% at 12% 8%, rgba(255, 255, 255, .55) 0%, transparent 55%),
    repeating-linear-gradient(115deg, rgba(255, 255, 255, .16) 0 2px, transparent 2px 9px),
    linear-gradient(158deg, var(--jade-wash) 0%, #bcd6cf 42%, var(--jade) 100%);
  box-shadow: var(--lift);
}

.figure-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(14, 28, 31, .10);
  border-radius: var(--corner);
  pointer-events: none;
}

.figure-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  padding: 0;
}

.figure-frame--tall  { aspect-ratio: 4 / 5; }
.figure-frame--wide  { aspect-ratio: 16 / 9; }
.figure-frame--panel { aspect-ratio: 3 / 2; }

.figure-note {
  font-family: var(--face-num);
  font-size: .7rem;
  letter-spacing: .05em;
  color: var(--tone-400);
  margin: .7rem 0 0;
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   overture, the hero
   -------------------------------------------------------------------------- */

.overture {
  padding-block: 2.6rem 2.2rem;
  border-bottom: 1px solid var(--rule);
  background:
    radial-gradient(90% 120% at 88% 0%, rgba(220, 236, 231, .9) 0%, transparent 62%),
    var(--field);
}

@media (min-width: 900px) { .overture { padding-block: 4.4rem 3.6rem; } }

.overture-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 900px) {
  .overture-grid {
    grid-template-columns: 20px minmax(0, 1.12fr) minmax(0, .82fr);
    gap: 3.2rem;
    align-items: stretch;
  }
  .overture-copy { align-self: center; }
}

.overture-copy h1 { margin-bottom: .5em; }
.overture-copy .standfirst { max-width: 46ch; }

.overture-figure { align-self: stretch; display: flex; }
.overture-figure .figure-frame { width: 100%; }
@media (min-width: 900px) { .overture-figure .figure-frame { max-height: 620px; } }

/* numbered entry strip under the hero */
.startset {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--rule);
}

@media (min-width: 760px) { .startset { grid-template-columns: repeat(4, 1fr); } }

.startset a {
  display: block;
  text-decoration: none;
  color: inherit;
  padding: 1.35rem 0 1.4rem;
  border-bottom: 1px solid var(--rule);
  transition: background-color .16s ease;
}

@media (min-width: 760px) {
  .startset a {
    padding: 1.6rem 1.5rem 1.7rem;
    border-bottom: 0;
    border-right: 1px solid var(--rule);
  }
  .startset a:first-child { padding-left: 0; }
  .startset a:last-child { border-right: 0; padding-right: 0; }
}

.startset a:hover { background: rgba(220, 236, 231, .5); }

.startset-num {
  display: block;
  font-family: var(--face-num);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--jade);
  margin-bottom: .5rem;
}

.startset-title {
  display: block;
  font-family: var(--face-head);
  font-size: 1.06rem;
  font-weight: 650;
  letter-spacing: -.012em;
  color: var(--tone-950);
  margin-bottom: .3rem;
}

.startset-note {
  display: block;
  font-size: .92rem;
  line-height: 1.55;
  color: var(--tone-600);
}

/* --------------------------------------------------------------------------
   page-head, the banner used by every article and guide
   -------------------------------------------------------------------------- */

.page-head {
  background:
    radial-gradient(85% 130% at 92% 0%, rgba(220, 236, 231, .95) 0%, transparent 60%),
    var(--field-sunk);
  border-bottom: 1px solid var(--rule);
  padding-block: 1.8rem 2.4rem;
}

@media (min-width: 900px) { .page-head { padding-block: 2.8rem 5.2rem; } }

/* same banner, for pages that carry no opening image */
.page-head--plain { padding-block: 1.8rem 2.2rem; }
@media (min-width: 900px) { .page-head--plain { padding-block: 2.8rem 3.4rem; } }

.page-head h1 { max-width: 22ch; margin-bottom: .55em; }
.page-head .standfirst { max-width: 54ch; margin-bottom: 0; }

.page-figure { margin: 0 auto 2.6rem; }
@media (min-width: 900px) { .page-figure { margin-top: -3.4rem; } }

.page-body { padding-block: 2.4rem 3.2rem; }
@media (min-width: 900px) { .page-body { padding-block: 3rem 4.4rem; } }

/* --------------------------------------------------------------------------
   slabs, the horizontal bands
   -------------------------------------------------------------------------- */

.slab { padding-block: 3rem; }
@media (min-width: 900px) { .slab { padding-block: 4.6rem; } }

.slab--tint { background: var(--field-sunk); border-block: 1px solid var(--rule); }

.slab--deep {
  background:
    radial-gradient(80% 120% at 10% 0%, rgba(29, 138, 120, .34) 0%, transparent 58%),
    var(--deep);
  color: #c8d6d4;
}
.slab--deep h2, .slab--deep h3 { color: #f2f6f4; }
.slab--deep .flag { color: var(--chalk-hi); }
.slab--deep .flag::before { background: var(--jade-lift); }
.slab--deep a { color: var(--chalk-hi); }
.slab--deep .standfirst { color: #aebfbd; }

.band-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1.9rem;
}

.band-index {
  font-family: var(--face-num);
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--jade);
  flex: 0 0 auto;
  padding-top: .35rem;
}

.band-head h2 { margin: 0; flex: 0 1 auto; }

.band-head-line {
  flex: 1 1 auto;
  height: 1px;
  background: var(--rule);
  transform: translateY(-.25rem);
}
.slab--deep .band-head-line { background: var(--rule-dark); }
.slab--deep .band-index { color: var(--jade-lift); }

/* --------------------------------------------------------------------------
   reel, the card grid
   -------------------------------------------------------------------------- */

.reel {
  display: grid;
  gap: 1.15rem;
  grid-template-columns: 1fr;
}

@media (min-width: 620px) { .reel { grid-template-columns: repeat(2, 1fr); gap: 1.35rem; } }
@media (min-width: 1000px) { .reel--three { grid-template-columns: repeat(3, 1fr); } }

.reel-card {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--corner);
  padding: 1.5rem 1.5rem 1.6rem;
  text-decoration: none;
  color: inherit;
  position: relative;
  transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}

.reel-card::before {
  content: "";
  position: absolute;
  inset: -1px -1px auto -1px;
  height: 3px;
  background: transparent;
  border-radius: var(--corner) var(--corner) 0 0;
  transition: background-color .16s ease;
}

.reel-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--lift-hi);
  border-color: #c3cfcb;
}
.reel-card:hover::before { background: var(--jade); }

.reel-card-tag {
  font-family: var(--face-num);
  font-size: .68rem;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--jade);
  margin-bottom: .75rem;
}

.reel-card h3 { margin: 0 0 .5rem; }
.reel-card p { font-size: .96rem; color: var(--tone-600); line-height: 1.6; margin: 0; }

.reel-card-more {
  margin-top: 1.1rem;
  font-family: var(--face-head);
  font-size: .88rem;
  font-weight: 650;
  color: var(--jade);
}
.reel-card:hover .reel-card-more { color: var(--jade-deep); }

.reel-card--lead { background: var(--deep); border-color: var(--deep); color: #c8d6d4; }
.reel-card--lead h3 { color: #f2f6f4; }
.reel-card--lead p { color: #a9bcb9; }
.reel-card--lead .reel-card-tag, .reel-card--lead .reel-card-more { color: var(--chalk-hi); }
.reel-card--lead:hover { border-color: var(--deep); }

/* --------------------------------------------------------------------------
   duo, asymmetric two column block
   -------------------------------------------------------------------------- */

.duo { display: grid; gap: 2.2rem; }
@media (min-width: 900px) {
  .duo { grid-template-columns: minmax(0, 1fr) minmax(0, .78fr); gap: 3.6rem; align-items: start; }
  .duo--flip > *:first-child { order: 2; }
}

.duo-aside {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--corner);
  padding: 1.6rem 1.6rem 1.7rem;
  box-shadow: var(--lift);
}
.duo-aside h3 { font-size: 1.08rem; margin-bottom: .8rem; }

.slab--deep .duo-aside {
  background: rgba(255, 255, 255, .04);
  border-color: var(--rule-dark);
  box-shadow: none;
  color: #b6c7c5;
}
.slab--deep .duo-aside h3 { color: #f2f6f4; }

/* --------------------------------------------------------------------------
   notices, checklists, key facts
   -------------------------------------------------------------------------- */

.notice {
  background: var(--card);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--jade);
  border-radius: 0 var(--corner) var(--corner) 0;
  padding: 1.3rem 1.4rem;
  margin: 2rem 0;
}
.notice h3, .notice h2 {
  font-size: .74rem;
  font-family: var(--face-num);
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--jade);
  margin: 0 0 .7rem;
}
.notice p { font-size: .97rem; }
.notice--alert { border-left-color: var(--clay); }
.notice--alert h3, .notice--alert h2 { color: var(--clay); }
.notice--sun { border-left-color: var(--chalk-hi); background: #fdf8e8; border-color: #efe2b6; }
.notice--sun h3 { color: #8a6a08; }

.checklist { list-style: none; margin: 1.3rem 0; padding: 0; }
.checklist li {
  position: relative;
  padding: 0 0 .85rem 1.85rem;
  margin-bottom: .85rem;
  border-bottom: 1px solid var(--rule-soft);
}
.checklist li:last-child { border-bottom: 0; margin-bottom: 0; padding-bottom: 0; }
.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .58em;
  width: 9px;
  height: 9px;
  background: var(--jade);
  border-radius: 1px;
  transform: rotate(45deg);
}
.slab--deep .checklist li { border-bottom-color: var(--rule-dark); }
.slab--deep .checklist li::before { background: var(--chalk-hi); }

.keyfacts {
  margin: 1.8rem 0;
  border-top: 1px solid var(--rule);
}
.keyfacts div {
  display: grid;
  gap: .2rem;
  padding: .95rem 0;
  border-bottom: 1px solid var(--rule);
}
@media (min-width: 640px) {
  .keyfacts div { grid-template-columns: 12.5rem minmax(0, 1fr); gap: 1.4rem; align-items: baseline; }
}
.keyfacts dt {
  font-family: var(--face-num);
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--tone-400);
}
.keyfacts dd { margin: 0; font-size: .99rem; color: var(--tone-800); overflow-wrap: break-word; }

/* inside a narrow column the two column list folds back to one */
.duo-aside .keyfacts div { grid-template-columns: 1fr; gap: .2rem; }

/* --------------------------------------------------------------------------
   prose, the article body
   -------------------------------------------------------------------------- */

.prose { font-size: 1.06rem; line-height: 1.75; color: var(--tone-800); }
.prose > *:first-child { margin-top: 0; }

.prose h2 {
  position: relative;
  margin: 3.1rem 0 1rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
}
.prose h2::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 58px;
  height: 3px;
  background: var(--jade);
}

.prose h3 { margin: 2.1rem 0 .7rem; }

.prose ul, .prose ol { margin: 0 0 1.3rem; padding-left: 1.3rem; }
.prose li { margin-bottom: .55rem; }
.prose li::marker { color: var(--jade); }

.prose blockquote, .pull {
  font-family: var(--face-quote);
  font-size: clamp(1.2rem, 2.6vw, 1.5rem);
  line-height: 1.45;
  color: var(--jade-deep);
  border-left: 3px solid var(--chalk-hi);
  margin: 2.2rem 0;
  padding: .2rem 0 .2rem 1.25rem;
}

.prose a { font-weight: 500; }

.toc-panel {
  background: var(--field-sunk);
  border: 1px solid var(--rule);
  border-radius: var(--corner);
  padding: 1.35rem 1.5rem 1.45rem;
  margin: 0 0 2.6rem;
}
.toc-panel h2 {
  font-family: var(--face-num);
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--tone-600);
  margin: 0 0 .85rem;
  padding: 0;
  border: 0;
}
.toc-panel h2::before { display: none; }
.toc-panel ol { margin: 0; padding-left: 1.15rem; font-size: .97rem; }
.toc-panel li { margin-bottom: .4rem; }
.toc-panel li::marker { font-family: var(--face-num); font-size: .82rem; color: var(--jade); }
.toc-panel a { text-decoration: none; color: var(--tone-800); }
.toc-panel a:hover { color: var(--jade); text-decoration: underline; }

/* --------------------------------------------------------------------------
   question set
   -------------------------------------------------------------------------- */

.faq-set { border-top: 1px solid var(--rule); margin: 2.2rem 0 0; }

.faq-set details { border-bottom: 1px solid var(--rule); }

.faq-set summary {
  cursor: pointer;
  list-style: none;
  padding: 1.1rem 2.4rem 1.1rem 0;
  position: relative;
  font-family: var(--face-head);
  font-weight: 650;
  font-size: 1.03rem;
  color: var(--tone-950);
}
.faq-set summary::-webkit-details-marker { display: none; }
.faq-set summary::after {
  content: "";
  position: absolute;
  right: .35rem;
  top: 50%;
  width: 12px;
  height: 12px;
  margin-top: -6px;
  background:
    linear-gradient(var(--jade) 0 0) center / 100% 2px no-repeat,
    linear-gradient(var(--jade) 0 0) center / 2px 100% no-repeat;
  transition: transform .18s ease;
}
.faq-set details[open] summary::after { transform: rotate(45deg); }
.faq-set summary:hover { color: var(--jade); }
.faq-set details > div { padding: 0 0 1.3rem; font-size: 1rem; color: var(--tone-600); max-width: 62ch; }

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

.footer-base {
  background: var(--deep);
  color: #93a8a6;
  padding-block: 3rem 2rem;
  font-size: .94rem;
}

.footer-grid { display: grid; gap: 2.2rem; }
@media (min-width: 860px) {
  .footer-grid { grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1fr); gap: 3rem; }
}

.footer-word .sigil-word { color: #f2f6f4; }
.footer-word .sigil-word b { color: var(--jade-lift); }
.footer-word .sigil { margin-bottom: 1rem; }

.footer-stance { max-width: 44ch; line-height: 1.65; color: #8fa4a2; }

.footer-base h4 {
  font-family: var(--face-num);
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: #6f8583;
  margin: 0 0 .9rem;
}

.footer-links { list-style: none; margin: 0; padding: 0; }
.footer-links li { margin-bottom: .55rem; }
.footer-links a { color: #cfdcda; text-decoration: none; }
.footer-links a:hover { color: var(--chalk-hi); text-decoration: underline; }

.footer-fine {
  margin-top: 2.6rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--rule-dark);
  display: grid;
  gap: .8rem;
  font-size: .84rem;
  color: #7a908e;
}
@media (min-width: 860px) {
  .footer-fine { grid-template-columns: auto minmax(0, 1fr); gap: 2.4rem; align-items: start; }
}
.footer-fine a { color: #b9c9c7; }
.footer-fine p { margin: 0; }

/* --------------------------------------------------------------------------
   components dropped inside an article body keep their own manners
   -------------------------------------------------------------------------- */

.prose .notice { margin: 2.2rem 0; }
.prose .notice h2,
.prose .notice h3 { margin: 0 0 .7rem; padding: 0; border: 0; }
.prose .notice h2::before,
.prose .notice h3::before { display: none; }

.prose .checklist { list-style: none; margin: 1.5rem 0; padding-left: 0; }
.prose .checklist li { margin-bottom: .85rem; padding: 0 0 .85rem 1.85rem; }
.prose .checklist li:last-child { margin-bottom: 0; padding-bottom: 0; }

.prose .keyfacts { margin: 1.9rem 0; }
.prose .faq-set summary { margin: 0; }

/* --------------------------------------------------------------------------
   preferences and print
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

@media print {
  .masthead, .footer-base, .wayfinder, .figure-frame, .btn-row { display: none !important; }
  body { background: #fff; color: #000; font-size: 12pt; }
  .slab { padding-block: 0; }
}