/* ============================================================================
   ATELIER — design pilot, scoped to body.atelier-design (resource 08 only).
   Loaded as a second stylesheet after styles.css, so the site header, footer,
   and announcement keep working; everything below either restyles those inside
   this page or adds components that exist nowhere else.
   No webfonts, no libraries: system serif + one canvas.
   ========================================================================== */

.atelier-design {
  --atl-paper: #f7f2ea;
  --atl-paper-deep: #efe6d9;
  --atl-card: #fffdf9;
  --atl-ink: #1d1a16;
  --atl-ink-soft: #6d655a;
  --atl-ink-faint: #9a9083;
  --atl-line: #e6dccc;
  --atl-line-strong: #d8cab4;
  --atl-accent: #c25a32;
  --atl-accent-deep: #a4441f;
  --atl-accent-soft: #f8e8e0;
  --atl-violet: #6f5fc4;
  --atl-violet-soft: #efecfb;
  --atl-blue: #2a78d6;
  --atl-blue-soft: #e6f0fc;
  --atl-note: #fbf0bd;
  --atl-note-line: #ecdc95;
  --atl-serif: "Iowan Old Style", "Hoefler Text", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, ui-serif, serif;
  --atl-shadow: 0 1px 2px rgba(29, 26, 22, .04), 0 12px 32px -18px rgba(29, 26, 22, .28);
  --atl-shadow-lift: 0 2px 4px rgba(29, 26, 22, .05), 0 26px 60px -26px rgba(29, 26, 22, .38);
  --atl-r: 22px;
  --atl-r-sm: 14px;

  background: var(--atl-paper);
  color: var(--atl-ink);
}

/* Warm paper grain + two soft light sources, fixed so the page reads as one room. */
.atelier-design::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(760px 520px at 12% -6%, rgba(194, 90, 50, .10), transparent 62%),
    radial-gradient(680px 520px at 92% 4%, rgba(111, 95, 196, .09), transparent 60%),
    radial-gradient(900px 700px at 50% 100%, rgba(231, 184, 79, .08), transparent 65%);
}

.atelier-design main {
  position: relative;
  z-index: 1;
}

/* --- site chrome, softened so it belongs to the same room ------------------ */

.atelier-design .site-header {
  background: rgba(247, 242, 234, .86);
  backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid var(--atl-line);
  box-shadow: none;
}

.atelier-design .site-header .brand-name {
  font-family: var(--atl-serif);
  letter-spacing: -.01em;
}

.atelier-design .footer {
  background: var(--atl-paper-deep);
  border-top: 1px solid var(--atl-line);
}

.atelier-design .footer h2,
.atelier-design .footer h3 {
  font-family: var(--atl-serif);
}

/* --- shell ---------------------------------------------------------------- */

/* Full-bleed: these pages are panel layouts, not prose columns, so a centred cap
   only bought empty gutters. The reading measure is held by .atl-main p instead. */
.atl {
  max-width: none;
  margin: 0 auto;
  padding: 1.6rem clamp(.9rem, 1.6vw, 1.6rem) 4rem;
}

/* styles.css gives every h1 a hard offset shadow; that belongs to the brutalist
   pages, not this one. */
.atelier-design h1,
.atelier-design h2,
.atelier-design h3 {
  text-shadow: none;
  max-width: none;
}

.atl-glyph {
  color: var(--atl-accent);
  font-size: .95rem;
  line-height: 1;
  opacity: .8;
}

/* --- stage head ----------------------------------------------------------- */

.atl-stage-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.2rem 2rem;
  padding: .4rem .4rem 1.15rem;
}

.atl-kicker {
  margin: 0 0 .5rem;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--atl-ink-faint);
}

.atl-title {
  margin: 0;
  font-family: var(--atl-serif);
  font-size: clamp(2.2rem, 4.6vw, 3.5rem);
  line-height: .98;
  letter-spacing: -.025em;
  font-weight: 400;
}

.atl-title em {
  font-style: italic;
  color: var(--atl-accent);
}

.atl-sub {
  margin: .55rem 0 0;
  font-family: var(--atl-serif);
  font-style: italic;
  font-size: clamp(1rem, 1.6vw, 1.28rem);
  color: var(--atl-violet);
}

.atl-modes {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  padding: .35rem;
  background: var(--atl-card);
  border: 1px solid var(--atl-line);
  border-radius: 999px;
  box-shadow: var(--atl-shadow);
}

.atl-modes button {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .6rem 1.05rem;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  font: inherit;
  font-size: .9rem;
  font-weight: 500;
  color: var(--atl-ink-soft);
  cursor: pointer;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}

.atl-modes button i {
  font-style: normal;
  opacity: .75;
}

.atl-modes button:hover {
  background: var(--atl-accent-soft);
  color: var(--atl-ink);
}

.atl-modes button[aria-pressed="true"] {
  background: var(--atl-card);
  border-color: var(--atl-violet);
  color: var(--atl-ink);
  box-shadow: 0 0 0 3px var(--atl-violet-soft);
}

/* --- three-column stage --------------------------------------------------- */

.atl-stage-grid {
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr) 350px;
  gap: 1.1rem;
  align-items: stretch;
}

.atl-panel {
  background: var(--atl-card);
  border: 1px solid var(--atl-line);
  border-radius: var(--atl-r);
  box-shadow: var(--atl-shadow);
}

.atl-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.25rem .85rem;
}

.atl-panel-head h2,
.atl-panel-head p {
  margin: 0;
  font-family: inherit;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--atl-ink-faint);
}

/* --- library -------------------------------------------------------------- */

.atl-library {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.atl-lib-list {
  list-style: none;
  margin: 0;
  padding: 0 .6rem;
  overflow-y: auto;
  flex: 1;
}

.atl-lib-list button {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  align-items: center;
  gap: .85rem;
  width: 100%;
  padding: .6rem .65rem;
  margin: .15rem 0;
  border: 1px solid transparent;
  border-radius: var(--atl-r-sm);
  background: transparent;
  font: inherit;
  text-align: left;
  color: var(--atl-ink);
  cursor: pointer;
  transition: background .18s ease, border-color .18s ease, transform .18s ease;
}

.atl-lib-list button:hover {
  background: var(--atl-paper);
  transform: translateX(2px);
}

.atl-lib-list button[aria-pressed="true"] {
  background: var(--atl-accent-soft);
  border-color: rgba(194, 90, 50, .34);
}

.atl-sigil {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--atl-paper);
  border: 1px solid var(--atl-line-strong);
  overflow: hidden;
  flex: none;
}

.atl-sigil svg {
  display: block;
  width: 100%;
  height: 100%;
}

.atl-lib-name {
  display: block;
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: -.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.atl-lib-maker {
  display: block;
  font-size: .76rem;
  color: var(--atl-ink-faint);
}

.atl-lib-price {
  font-family: var(--atl-serif);
  font-size: .9rem;
  color: var(--atl-ink-soft);
  white-space: nowrap;
}

.atl-lib-list button[aria-pressed="true"] .atl-lib-price {
  color: var(--atl-accent-deep);
}

.atl-lib-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin: .6rem .9rem 1rem;
  padding: .8rem 1rem;
  border: 1px solid var(--atl-line);
  border-radius: var(--atl-r-sm);
  font-size: .88rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--atl-ink);
  transition: border-color .18s ease, background .18s ease;
}

.atl-lib-foot:hover {
  background: var(--atl-paper);
  border-color: var(--atl-line-strong);
}

/* --- viewer --------------------------------------------------------------- */

.atl-viewer {
  position: relative;
  overflow: hidden;
  min-height: 560px;
  background:
    radial-gradient(60% 55% at 50% 42%, #fffefb 0%, var(--atl-card) 46%, var(--atl-paper-deep) 100%);
}

.atl-canvas-wrap {
  position: absolute;
  inset: 0;
  cursor: grab;
  touch-action: none;
}

.atl-canvas-wrap.is-dragging {
  cursor: grabbing;
}

.atl-canvas-wrap canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* concentric floor rings, purely atmospheric */
.atl-viewer::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 8%;
  width: 60%;
  aspect-ratio: 3 / 1;
  transform: translateX(-50%);
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(29, 26, 22, .10), transparent 72%);
  pointer-events: none;
}

.atl-tools {
  position: absolute;
  top: 50%;
  left: 1.1rem;
  transform: translateY(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  gap: .1rem;
  padding: .55rem .35rem;
  background: rgba(255, 253, 249, .92);
  backdrop-filter: blur(8px);
  border: 1px solid var(--atl-line);
  border-radius: 18px;
  box-shadow: var(--atl-shadow);
}

.atl-tools button {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .18rem;
  width: 62px;
  padding: .5rem .2rem;
  border: 0;
  border-radius: 12px;
  background: transparent;
  font: inherit;
  font-size: .6rem;
  letter-spacing: .04em;
  color: var(--atl-ink-soft);
  cursor: pointer;
  transition: background .16s ease, color .16s ease;
}

.atl-tools button i {
  font-style: normal;
  font-size: 1.05rem;
  line-height: 1.1;
  color: var(--atl-ink);
  opacity: .78;
}

.atl-tools button:hover {
  background: var(--atl-accent-soft);
  color: var(--atl-ink);
}

.atl-tools button[aria-pressed="true"] {
  background: var(--atl-accent-soft);
  color: var(--atl-accent-deep);
}

.atl-tools button[aria-pressed="true"] i {
  color: var(--atl-accent);
  opacity: 1;
}

.atl-tools hr {
  width: 60%;
  margin: .35rem auto;
  border: 0;
  border-top: 1px solid var(--atl-line);
}

/* sticky note */
.atl-note {
  position: absolute;
  top: 1.4rem;
  right: 1.4rem;
  z-index: 3;
  width: 218px;
  padding: 1rem 1.05rem 1.15rem;
  background: var(--atl-note);
  border: 1px solid var(--atl-note-line);
  border-radius: 4px 4px 10px 4px;
  transform: rotate(1.4deg);
  box-shadow: 0 10px 24px -14px rgba(29, 26, 22, .5);
  font-family: var(--atl-serif);
  font-size: .92rem;
  line-height: 1.5;
  color: #5c4c15;
  transition: transform .25s ease, box-shadow .25s ease;
}

.atl-note:hover {
  transform: rotate(0deg) translateY(-2px);
  box-shadow: 0 16px 30px -16px rgba(29, 26, 22, .5);
}

.atl-note-title {
  display: flex;
  align-items: center;
  gap: .4rem;
  margin: 0 0 .5rem;
  font-family: Inter, system-ui, sans-serif;
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: #93791d;
}

.atl-note p {
  margin: 0;
}

.atl-note p + p {
  margin-top: .45rem;
}

.atl-note strong {
  font-weight: 600;
  color: #3f340e;
}

/* viewer footer */
.atl-viewer-foot {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 3;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.3rem;
}

.atl-viewer-caption {
  max-width: 62%;
}

.atl-viewer-caption span {
  display: block;
  font-size: .64rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--atl-ink-faint);
}

.atl-viewer-caption strong {
  display: block;
  margin-top: .18rem;
  font-family: var(--atl-serif);
  font-size: 1.02rem;
  font-weight: 400;
  color: var(--atl-ink);
}

.atl-switch {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  padding: .45rem .55rem .45rem .9rem;
  background: rgba(255, 253, 249, .94);
  border: 1px solid var(--atl-line);
  border-radius: 999px;
  box-shadow: var(--atl-shadow);
  font-size: .8rem;
  color: var(--atl-ink-soft);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}

.atl-switch input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.atl-switch .atl-track {
  position: relative;
  width: 38px;
  height: 22px;
  border-radius: 999px;
  background: var(--atl-line-strong);
  transition: background .2s ease;
}

.atl-switch .atl-track::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, .25);
  transition: transform .2s ease;
}

.atl-switch input:checked + .atl-track {
  background: var(--atl-accent);
}

.atl-switch input:checked + .atl-track::after {
  transform: translateX(16px);
}

.atl-switch input:focus-visible + .atl-track {
  outline: 2px solid var(--atl-violet);
  outline-offset: 2px;
}

/* --- spec sheet ----------------------------------------------------------- */

.atl-spec {
  display: flex;
  flex-direction: column;
  padding: 1.15rem 1.3rem 1.25rem;
  overflow: hidden;
}

.atl-spec-eyebrow {
  display: flex;
  align-items: center;
  gap: .45rem;
  margin: 0 0 .5rem;
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .17em;
  text-transform: uppercase;
  color: var(--atl-accent);
}

.atl-spec-title {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.atl-spec h2 {
  margin: 0;
  font-family: var(--atl-serif);
  font-size: 1.85rem;
  line-height: 1.06;
  letter-spacing: -.02em;
  font-weight: 400;
}

.atl-spec-mark {
  width: 62px;
  height: 62px;
  border-radius: 50%;
  border: 1px solid var(--atl-line-strong);
  background: var(--atl-paper);
  overflow: hidden;
  flex: none;
}

.atl-spec-mark svg {
  display: block;
  width: 100%;
  height: 100%;
}

.atl-spec-tag {
  margin: .35rem 0 0;
  font-family: var(--atl-serif);
  font-style: italic;
  font-size: 1.02rem;
  color: var(--atl-violet);
}

.atl-spec-blurb {
  margin: .8rem 0 0;
  padding-bottom: .9rem;
  border-bottom: 1px solid var(--atl-line);
  font-size: .93rem;
  line-height: 1.62;
  color: var(--atl-ink-soft);
}

.atl-facts-title {
  margin: 1rem 0 .55rem;
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .17em;
  text-transform: uppercase;
  color: var(--atl-ink-faint);
}

.atl-facts {
  margin: 0;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 0 .8rem;
}

.atl-facts dt {
  display: flex;
  align-items: baseline;
  gap: .45rem;
  padding: .27rem 0;
  font-size: .86rem;
  color: var(--atl-ink-soft);
}

.atl-facts dt b {
  font-weight: 400;
  color: var(--atl-accent);
  font-size: .7rem;
}

.atl-facts dd {
  margin: 0;
  padding: .27rem 0;
  font-family: var(--atl-serif);
  font-size: .96rem;
  text-align: right;
  color: var(--atl-ink);
}

.atl-facts dd.is-empty {
  color: var(--atl-ink-faint);
}

.atl-callout {
  display: flex;
  gap: .7rem;
  margin-top: 1rem;
  padding: .85rem .95rem;
  border-radius: var(--atl-r-sm);
  background: var(--atl-violet-soft);
  font-size: .86rem;
  line-height: 1.5;
  color: #40376f;
}

.atl-callout.is-warm {
  background: var(--atl-accent-soft);
  color: #6d3016;
}

.atl-callout b {
  display: block;
  font-size: .72rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.atl-spec-actions {
  margin-top: auto;
  padding-top: 1.1rem;
  display: grid;
  gap: .5rem;
}

.atl-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .8rem;
  padding: .85rem 1.1rem;
  border: 1px solid transparent;
  border-radius: var(--atl-r-sm);
  background: var(--atl-accent);
  color: #fff;
  font-size: .93rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: background .18s ease, transform .18s ease, border-color .18s ease;
}

.atl-btn:hover {
  background: var(--atl-accent-deep);
  transform: translateY(-1px);
}

.atl-btn-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .5rem;
}

.atl-btn.ghost {
  justify-content: center;
  background: transparent;
  border-color: var(--atl-line-strong);
  color: var(--atl-ink);
  font: inherit;
  font-size: .88rem;
}

.atl-btn.ghost:hover {
  background: var(--atl-paper);
  border-color: var(--atl-accent);
  color: var(--atl-accent-deep);
}

/* --- deck of jump cards --------------------------------------------------- */

.atl-deck {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.1rem;
  margin-top: 1.1rem;
}

.atl-deck a {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .35rem;
  min-height: 168px;
  padding: 1.1rem 1.2rem 1.2rem;
  overflow: hidden;
  background: var(--atl-card);
  border: 1px solid var(--atl-line);
  border-radius: var(--atl-r);
  box-shadow: var(--atl-shadow);
  text-decoration: none;
  color: var(--atl-ink);
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}

.atl-deck a:hover {
  transform: translateY(-4px);
  border-color: var(--atl-line-strong);
  box-shadow: var(--atl-shadow-lift);
}

.atl-deck-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--atl-serif);
  font-style: italic;
  font-size: .84rem;
  color: var(--atl-violet);
}

.atl-deck-title {
  font-family: var(--atl-serif);
  font-size: 1.24rem;
  line-height: 1.2;
  letter-spacing: -.01em;
}

.atl-deck-note {
  margin-top: auto;
  font-size: .82rem;
  line-height: 1.5;
  color: var(--atl-ink-soft);
}

.atl-deck-fig {
  position: absolute;
  right: -14px;
  bottom: -18px;
  width: 96px;
  opacity: .5;
  pointer-events: none;
}

/* --- reading room --------------------------------------------------------- */

.atl-read {
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr) 268px;
  gap: 2rem;
  align-items: start;
  margin-top: 3.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--atl-line);
}

.atl-rail,
.atl-links {
  position: sticky;
  top: 88px;
}

.atl-rail-title,
.atl-links-title {
  margin: 0 0 .8rem;
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .17em;
  text-transform: uppercase;
  color: var(--atl-ink-faint);
}

.atl-rail ol {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--atl-line);
}

.atl-rail a {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: .5rem;
  padding: .48rem .7rem;
  margin-left: -1px;
  border-left: 2px solid transparent;
  font-size: .86rem;
  line-height: 1.35;
  color: var(--atl-ink-soft);
  text-decoration: none;
  transition: color .18s ease, border-color .18s ease;
}

.atl-rail a span {
  font-family: var(--atl-serif);
  font-size: .78rem;
  color: var(--atl-ink-faint);
}

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

.atl-rail a[aria-current="true"] {
  border-left-color: var(--atl-accent);
  color: var(--atl-ink);
  font-weight: 500;
}

.atl-rail a[aria-current="true"] span {
  color: var(--atl-accent);
}

.atl-links-group,
.atl-links-standing {
  display: grid;
  gap: .4rem;
}

/* `display: grid` outranks the UA rule for [hidden], and every group ships
   hidden until its section is the one being read. */
.atl-links-group[hidden] {
  display: none;
}

.atl-links-standing {
  margin-top: 1.4rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--atl-line);
}

.atl-links a {
  display: block;
  padding: .6rem .75rem;
  background: var(--atl-card);
  border: 1px solid var(--atl-line);
  border-radius: 12px;
  font-size: .84rem;
  line-height: 1.35;
  color: var(--atl-ink);
  text-decoration: none;
  transition: border-color .18s ease, transform .18s ease;
}

.atl-links a:hover {
  border-color: var(--atl-accent);
  transform: translateX(2px);
}

.atl-links a b {
  display: block;
  font-size: .66rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--atl-ink-faint);
}

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

.atl-main .guide-section {
  margin: 0 0 3.2rem;
  padding: 0;
  border: 0;
  scroll-margin-top: 96px;
}

.atl-main .guide-section-label {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: .7rem;
  padding: 0;
  background: none;
  border: 0;
  font-family: var(--atl-serif);
  font-style: italic;
  font-size: .95rem;
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
  color: var(--atl-violet);
}

.atl-main .guide-section-label::before {
  content: "◇";
  font-style: normal;
  font-size: .72rem;
  color: var(--atl-accent);
}

.atl-main .guide-section h2 {
  margin: 0 0 1rem;
  max-width: 22ch;
  font-family: var(--atl-serif);
  font-size: clamp(1.85rem, 3.1vw, 2.7rem);
  line-height: 1.1;
  letter-spacing: -.022em;
  font-weight: 400;
  color: var(--atl-ink);
}

.atl-main .guide-section h3 {
  margin: 2.2rem 0 .7rem;
  font-family: var(--atl-serif);
  font-size: 1.45rem;
  line-height: 1.2;
  letter-spacing: -.015em;
  font-weight: 400;
}

.atl-main .guide-section p,
.atl-main .guide-section li {
  font-size: 1.07rem;
  line-height: 1.72;
  color: #3b362f;
}

.atl-main .guide-section p {
  max-width: 68ch;
}

.atl-main .guide-section strong {
  font-weight: 600;
  color: var(--atl-ink);
}

.atl-main .guide-lede > p:first-of-type {
  font-family: var(--atl-serif);
  font-size: 1.3rem;
  line-height: 1.6;
  color: #2c2823;
}

.atl-main .guide-freshness {
  padding: .8rem 1rem;
  border-left: 2px solid var(--atl-accent);
  background: var(--atl-accent-soft);
  border-radius: 0 12px 12px 0;
  font-size: .92rem !important;
}

/* figures become framed plates */
.atl-main .guide-figure {
  margin: 1.9rem 0;
  padding: 1.1rem 1.1rem .35rem;
  background: var(--atl-card);
  border: 1px solid var(--atl-line);
  border-radius: var(--atl-r);
  box-shadow: var(--atl-shadow);
}

.atl-main .guide-figure img,
.atl-main .guide-figure svg {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
}

.atl-main .guide-figure.is-post img {
  max-width: 560px;
  margin: 0 auto;
  border: 1px solid var(--atl-line);
}

.atl-main .guide-figure figcaption {
  padding: .85rem .3rem 1rem;
  font-family: var(--atl-serif);
  font-size: .93rem;
  line-height: 1.55;
  color: var(--atl-ink-soft);
}

.atl-main .guide-figure figcaption strong {
  color: var(--atl-ink);
}

/* pull quotes */
.atl-main .guide-pull {
  position: relative;
  margin: 2rem 0;
  padding: 1.6rem 1.6rem 1.4rem 3.2rem;
  background: var(--atl-paper-deep);
  border: 0;
  border-radius: var(--atl-r);
}

.atl-main .guide-pull::before {
  content: "\201C";
  position: absolute;
  top: .35rem;
  left: 1rem;
  font-family: var(--atl-serif);
  font-size: 4.2rem;
  line-height: 1;
  color: var(--atl-accent);
  opacity: .38;
}

.atl-main .guide-pull p {
  margin: 0;
  font-family: var(--atl-serif);
  font-size: 1.22rem;
  line-height: 1.55;
  color: #2c2823;
}

.atl-main .guide-pull cite {
  display: block;
  margin-top: .8rem;
  font-style: normal;
  font-size: .86rem;
  color: var(--atl-ink-soft);
}

/* callouts, decisions, steps */
.atl-main .guide-callout {
  margin: 1.8rem 0;
  padding: 1.15rem 1.3rem;
  background: var(--atl-note);
  border: 1px solid var(--atl-note-line);
  border-radius: var(--atl-r-sm);
  font-size: 1rem;
  line-height: 1.62;
  color: #4d400f;
}

.atl-main .guide-callout strong {
  color: #33290a;
}

.atl-main .guide-decision {
  display: grid;
  gap: .1rem;
  margin: 1.9rem 0;
  padding: 0;
  background: var(--atl-card);
  border: 1px solid var(--atl-line);
  border-radius: var(--atl-r);
  overflow: hidden;
  box-shadow: var(--atl-shadow);
}

.atl-main .guide-decision p {
  margin: 0;
  padding: 1.1rem 1.3rem;
  max-width: none;
  border-bottom: 1px solid var(--atl-line);
  font-size: 1rem;
}

.atl-main .guide-decision p:last-child {
  border-bottom: 0;
}

.atl-main .guide-decision strong {
  color: var(--atl-accent-deep);
}

.atl-main .guide-steps,
.atl-main .guide-source-list {
  margin: 1.4rem 0;
  padding-left: 1.3rem;
}

.atl-main .guide-steps li,
.atl-main .guide-source-list li {
  margin-bottom: .6rem;
  padding-left: .3rem;
  border: 0;
  background: none;
}

.atl-main .guide-steps li::marker,
.atl-main .guide-source-list li::marker {
  color: var(--atl-accent);
  font-family: var(--atl-serif);
}

.atl-main .guide-stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: .9rem;
  margin: 1.8rem 0;
}

.atl-main .guide-stat-grid div {
  padding: 1.1rem 1.2rem;
  background: var(--atl-card);
  border: 1px solid var(--atl-line);
  border-radius: var(--atl-r-sm);
  box-shadow: none;
  text-align: left;
}

.atl-main .guide-stat-grid strong {
  display: block;
  font-family: var(--atl-serif);
  font-size: 2rem;
  font-weight: 400;
  line-height: 1;
  color: var(--atl-accent-deep);
}

.atl-main .guide-stat-grid span {
  display: block;
  margin-top: .35rem;
  font-size: .84rem;
  color: var(--atl-ink-soft);
}

.atl-main .guide-source-row {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 1.4rem 0;
}

.atl-main .guide-source-row a {
  padding: .5rem .9rem;
  background: var(--atl-card);
  border: 1px solid var(--atl-line);
  border-radius: 999px;
  box-shadow: none;
  font-size: .85rem;
  color: var(--atl-ink);
  text-decoration: none;
}

.atl-main .guide-source-row a:hover {
  border-color: var(--atl-accent);
  color: var(--atl-accent-deep);
}

.atl-main .guide-section blockquote {
  margin: 2rem 0;
  padding: 1.3rem 1.5rem;
  background: var(--atl-ink);
  border: 0;
  border-radius: var(--atl-r);
  color: #f3ece1;
}

.atl-main .guide-section blockquote p {
  margin: 0;
  max-width: none;
  font-family: var(--atl-serif);
  font-size: 1.12rem;
  line-height: 1.62;
  color: #f3ece1;
}

.atl-main .guide-section blockquote strong {
  color: #f6c98a;
}

.atl-main .guide-section pre {
  margin: 1.4rem 0;
  padding: 1.1rem 1.25rem;
  background: #211e1a;
  border: 0;
  border-radius: var(--atl-r-sm);
  box-shadow: none;
  overflow-x: auto;
}

.atl-main .guide-section pre code {
  color: #e8ddcb;
  font-size: .88rem;
  line-height: 1.65;
}

.atl-main .guide-section :not(pre) > code {
  padding: .1rem .35rem;
  background: var(--atl-paper-deep);
  border: 0;
  border-radius: 5px;
  font-size: .89em;
  color: var(--atl-accent-deep);
}

.atl-main .guide-section a {
  color: var(--atl-accent-deep);
  text-decoration-color: rgba(194, 90, 50, .35);
  text-underline-offset: 3px;
}

.atl-main .guide-section a:hover {
  text-decoration-color: var(--atl-accent);
}

.atl-outro {
  margin: 3rem 0 0;
  padding: 2rem 2.2rem;
  background: var(--atl-card);
  border: 1px solid var(--atl-line);
  border-radius: var(--atl-r);
  box-shadow: var(--atl-shadow);
}

.atl-outro h3 {
  margin: 0 0 .5rem;
  font-family: var(--atl-serif);
  font-size: 1.7rem;
  font-weight: 400;
  letter-spacing: -.02em;
}

.atl-outro p {
  margin: 0 0 1.2rem;
  color: var(--atl-ink-soft);
}

.atl-outro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
}

.atl-outro .atl-btn {
  flex: none;
}

.atl-footnote {
  margin: 2.5rem auto 0;
  max-width: 780px;
  text-align: center;
  font-size: .82rem;
  line-height: 1.6;
  color: var(--atl-ink-faint);
}

/* --- responsive ----------------------------------------------------------- */

/* The auto-built deck carries a label and a title but no authored note, so the
   168px card written for the three-line version reads as mostly empty. */
.atl-deck.is-auto a {
  min-height: 0;
}

/* Bench-less resources: the evidence plane is the whole stage, so it spans the
   full width and there is no transport bar for the board to stop above. */
.atl-viewer-solo {
  --ccm-plane-bottom: 2.6rem;
  min-height: 460px;
  border-radius: var(--atl-r);
  border: 1px solid var(--atl-line);
  box-shadow: var(--atl-shadow);
}

/* Wide screens: grow the rails and the measure together. Holding the measure
   at 68ch while the middle column stretched to ~1400px left a dead band down
   the right of the script. */
@media (min-width: 1700px) {
  .atl-read {
    grid-template-columns: 300px minmax(0, 1fr) 360px;
    gap: 2.75rem;
  }

  .atl-main .guide-section p {
    max-width: 82ch;
  }
}

@media (max-width: 1320px) {
  .atl-stage-grid {
    grid-template-columns: 250px minmax(0, 1fr) 310px;
  }

  .atl-read {
    grid-template-columns: 200px minmax(0, 1fr);
  }

  .atl-links {
    display: none;
  }
}

@media (max-width: 1080px) {
  .atl-stage-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .atl-library {
    order: 2;
  }

  .atl-viewer {
    order: 1;
    min-height: 520px;
  }

  .atl-spec {
    order: 3;
  }

  .atl-lib-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    max-height: none;
  }

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

  .atl-rail {
    position: static;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--atl-line);
  }

  .atl-rail ol {
    display: flex;
    flex-wrap: wrap;
    gap: .3rem;
    border-left: 0;
  }

  .atl-rail a {
    border: 1px solid var(--atl-line);
    border-radius: 999px;
    background: var(--atl-card);
  }

  .atl-rail a[aria-current="true"] {
    border-color: var(--atl-accent);
  }
}

@media (max-width: 720px) {
  .atl {
    padding-left: .8rem;
    padding-right: .8rem;
  }

  .atl-viewer {
    min-height: 440px;
  }

  .atl-note {
    display: none;
  }

  /* The note is hidden at this width, so the rail moves to the top edge where
     it cannot collide with the caption. */
  .atl-tools {
    top: .8rem;
    bottom: auto;
    left: 50%;
    transform: translateX(-50%);
    flex-direction: row;
    padding: .3rem;
  }

  .atl-tools hr {
    width: 1px;
    height: auto;
    margin: .35rem;
    border-top: 0;
    border-left: 1px solid var(--atl-line);
  }

  .atl-tools button {
    width: 54px;
  }

  .atl-viewer-caption {
    max-width: 100%;
  }

  .atl-viewer-foot {
    flex-direction: column;
    align-items: flex-start;
    gap: .7rem;
  }

  .atl-modes {
    width: 100%;
  }

  .atl-modes button {
    flex: 1;
    justify-content: center;
    padding: .55rem .6rem;
    font-size: .82rem;
  }

  .atl-modes button i {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .atl-deck a,
  .atl-lib-list button,
  .atl-links a,
  .atl-note,
  .atl-btn {
    transition: none;
  }

  .atl-deck a:hover,
  .atl-lib-list button:hover,
  .atl-links a:hover,
  .atl-btn:hover {
    transform: none;
  }
}