/* ==========================================================================
   Components & polish — loaded after styles.css.
   New in this layer: icons in context, journey facts/education, builder steps, profile logos,
   the notes carousel, generated notes pages, the realistic cherry tree + falling petals,
   and the smoothness pass (one soft expo-out curve, longer reveals, off-screen animation pausing).
   ========================================================================== */

/* ---- smoothness: every ease in the site is one long, soft "expo-out" curve ---- */
:root {
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-io: cubic-bezier(0.65, 0, 0.35, 1);
}
html:not(.js) {
  scroll-behavior: smooth;
}
.js .rv {
  transform: translate3d(0, 30px, 0);
  transition:
    opacity 1.3s var(--ease) calc(var(--d, 0) * 1ms),
    transform 1.5s var(--ease) calc(var(--d, 0) * 1ms);
}
.js .rv.in {
  transform: none;
}
.js .ln .li {
  transform: translate3d(0, 112%, 0);
  transition: transform 1.4s var(--ease) calc(var(--d, 0) * 1ms);
}
.js .draw {
  transition: transform 1.6s var(--ease) calc(var(--d, 0) * 1ms);
}
.btn,
.pf,
.ct,
.ncard,
.fact,
.wc {
  transition:
    transform 0.9s var(--ease),
    border-color 0.7s var(--ease),
    background-color 0.7s var(--ease),
    box-shadow 0.9s var(--ease);
}
.vt-theme::view-transition-new(root) {
  animation-duration: 1.25s;
  animation-timing-function: var(--ease);
}
.hero.is-off *,
.connect.is-off *,
.is-off .tree,
.is-off .fp,
.is-off .fp-in {
  animation-play-state: paused !important;
}
.tree {
  transform: translate3d(0, 0, 0);
}

/* ---- hero: very little text, large and quiet ---- */
.copy {
  top: 180px;
  width: 900px;
}
.copy h1 {
  font: 400 94px/96px var(--serif);
  letter-spacing: -0.02em;
  margin-top: 28px;
}
.copy p.sup {
  font: italic 26px/34px var(--serif);
  color: var(--soft);
  width: auto;
  margin-top: 30px;
}
.ctas {
  margin-top: 40px;
}

/* ---- icons in context ---- */
.ic {
  flex: none;
  vertical-align: -0.18em;
}
.btn .ic,
.top-btn .ic,
.resume .ic {
  transition: transform 0.7s var(--ease);
}
.btn:hover .ic {
  transform: translateX(4px);
}
.resume {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.snd {
  display: grid;
  place-items: center;
}
.cl a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.cl a .ic {
  opacity: 0.85;
}
.wc .wic {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  margin-bottom: 22px;
}
.ck {
  display: flex;
  align-items: center;
  gap: 10px;
}
.ck .ic {
  color: var(--accent);
}

/* ---- journey: facts strip + education ---- */
.facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 44px 0 6px;
}
.fact {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 22px 26px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: color-mix(in srgb, var(--fg) 3%, transparent);
}
.fact .ic {
  color: var(--accent);
  width: 26px;
  height: 26px;
}
.fact b {
  display: block;
  font: 400 30px/1.1 var(--serif);
}
.fact span {
  font: 400 13.5px var(--sans);
  color: var(--muted);
}
.co.edu .edu-in {
  display: flex;
  gap: 28px;
  align-items: center;
  padding: 30px 34px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: color-mix(in srgb, var(--fg) 3%, transparent);
}
.co.edu h3 {
  font: 400 34px/1.15 var(--serif);
  margin: 8px 0 4px;
}
.co.edu .mission {
  font-size: 18px;
}
.edu-ic {
  width: 64px;
  height: 64px;
  flex: none;
  border-radius: 18px;
  display: grid;
  place-items: center;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
}

/* ---- builder steps with icons ---- */
.steps li b {
  display: grid;
  place-items: center;
  color: var(--accent);
}
.steps li span {
  display: block;
}
.steps li strong {
  display: block;
  font: 500 17px var(--sans);
  color: var(--fg);
}
.steps li em {
  display: block;
  font: 400 14.5px/22px var(--sans);
  font-style: normal;
  color: var(--muted);
  margin-top: 3px;
}

/* ---- trail: profile cards with brand marks ---- */
.pf {
  position: relative;
}
.pf-ic {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  margin-bottom: 14px;
  color: var(--fg);
  background: color-mix(in srgb, var(--fg) 7%, transparent);
  border: 1px solid var(--line);
}
.pf b i {
  display: inline-grid;
  vertical-align: middle;
  margin-left: 6px;
}

/* ---- carousel (home + notes index) ---- */
.carousel {
  position: relative;
}
.car-track {
  display: flex;
  gap: 28px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-padding-inline: 4px;
  padding: 6px 4px 22px;
  margin: 0 -4px;
  scrollbar-width: none;
  outline: none;
  cursor: grab;
  overscroll-behavior-x: contain;
}
.car-track::-webkit-scrollbar {
  display: none;
}
.car-track.dragging {
  cursor: grabbing;
  user-select: none;
}
.car-track:focus-visible {
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 60%, transparent);
  border-radius: 12px;
}
.ncard {
  flex: 0 0 min(560px, 82%);
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  background: color-mix(in srgb, var(--fg) 3%, transparent);
  user-select: none;
  -webkit-user-drag: none;
}
.ncard:hover {
  transform: translate3d(0, -6px, 0);
  border-color: color-mix(in srgb, var(--accent) 50%, transparent);
}
.ncard .art {
  height: 250px;
  overflow: hidden;
}
.ncard .art svg {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  transition: transform 1.6s var(--ease);
}
.ncard:hover .art svg {
  transform: scale(1.04);
}
.nbody {
  padding: 24px 28px 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.ncard .meta {
  font: 500 11.5px var(--sans);
  letter-spacing: 0.12em;
  color: var(--muted);
}
.ncard .meta b {
  color: var(--accent);
  margin-right: 12px;
  letter-spacing: 0.14em;
}
.ncard h3 {
  font: 400 32px/1.15 var(--serif);
}
.ncard p {
  font: 400 15.5px/25px var(--sans);
  color: var(--soft);
}
.ncard .more {
  margin-top: auto;
  padding-top: 8px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font: 500 14px var(--sans);
  color: var(--accent);
}
.ncard .more .ic {
  transition: transform 0.7s var(--ease);
}
.ncard:hover .more .ic {
  transform: translateX(5px);
}
.ncard.soon {
  border-style: dashed;
  background: transparent;
}
.ncard.soon:hover {
  transform: none;
}
.soon-box {
  height: 250px;
  display: grid;
  place-items: center;
  color: var(--muted);
  font: italic 26px var(--serif);
  background: repeating-linear-gradient(
    135deg,
    transparent 0 14px,
    color-mix(in srgb, var(--fg) 4%, transparent) 14px 15px
  );
}
.car-ui {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
  margin-top: 8px;
}
.car-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--fg);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition:
    border-color 0.6s var(--ease),
    background-color 0.6s var(--ease),
    opacity 0.6s var(--ease),
    transform 0.6s var(--ease);
}
.car-btn.prev .ic {
  transform: scaleX(-1);
}
.car-btn:hover:not(:disabled) {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
}
.car-btn:disabled {
  opacity: 0.3;
  cursor: default;
}
.car-dots {
  display: flex;
  gap: 10px;
}
.car-dots button {
  width: 9px;
  height: 9px;
  padding: 0;
  border: 0;
  border-radius: 9px;
  cursor: pointer;
  background: color-mix(in srgb, var(--fg) 28%, transparent);
  transition:
    width 0.7s var(--ease),
    background-color 0.7s var(--ease);
}
.car-dots button[aria-selected='true'] {
  width: 28px;
  background: var(--accent);
}
.carousel.single .car-btn,
.carousel.single .car-dots {
  display: none;
}

/* ---- closing scene: the tree is its own layer; petals are HTML ---- */
.connect .cstage {
  position: absolute;
  top: 0;
  left: 50%;
  width: 1440px;
  height: 1040px;
  margin-left: -720px;
  pointer-events: none;
}
.cstage .hill,
.cstage .tree-svg {
  position: absolute;
  inset: 0;
  display: block;
}
/* invisible hotspot over the trunk and crown */
.cstage .tree-link {
  position: absolute;
  left: 940px;
  top: 480px;
  width: 440px;
  height: 450px;
  pointer-events: auto;
  cursor: pointer;
  border-radius: 40% 40% 12% 12%;
}
.cstage .tree {
  position: absolute;
  inset: 0;
  transform-origin: 1155px 900px;
  animation: tree-sway 11s ease-in-out infinite alternate;
  will-change: transform;
}
.cstage .tree-svg {
  pointer-events: none;
}
@keyframes tree-sway {
  from {
    transform: rotate(-0.35deg);
  }
  to {
    transform: rotate(0.55deg);
  }
}
.petals {
  position: absolute;
  inset: 0;
  overflow: hidden;
}
.fp {
  position: absolute;
  width: 12px;
  height: 15px;
  opacity: 0;
  will-change: transform, opacity;
  animation: petal-fall var(--t) linear var(--dl) infinite;
}
.fp-in {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 80% 0 80% 20%;
  background: radial-gradient(circle at 30% 25%, var(--bl-white), var(--bl1) 55%, var(--bl3));
  transform: scale(var(--s));
  animation: petal-flutter var(--fl) ease-in-out infinite alternate;
  box-shadow: 0 0 6px color-mix(in srgb, var(--bl-glow) 35%, transparent);
}
.fp-in.alt {
  border-radius: 20% 80% 20% 80%;
  animation-direction: alternate-reverse;
}
@keyframes petal-fall {
  0% {
    opacity: 0;
    transform: translate3d(0, 0, 0);
  }
  8% {
    opacity: 0.95;
  }
  30% {
    transform: translate3d(calc(var(--dx) * 0.22), calc(var(--dy) * 0.3), 0);
  }
  62% {
    transform: translate3d(calc(var(--dx) * 0.62), calc(var(--dy) * 0.62), 0);
  }
  90% {
    opacity: 0.85;
  }
  100% {
    opacity: 0;
    transform: translate3d(var(--dx), var(--dy), 0);
  }
}
@keyframes petal-flutter {
  from {
    transform: scale(var(--s)) rotate3d(1, 0.4, 0.2, -50deg) rotateZ(-25deg);
  }
  to {
    transform: scale(var(--s)) rotate3d(1, 0.4, 0.2, 55deg) rotateZ(40deg);
  }
}

/* ---- generated notes pages ---- */
body.page {
  min-height: 100vh;
}
.page-stars {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(var(--bg), var(--bg));
}
.page-stars .starfield {
  position: absolute;
  inset: 0;
}
.post-wrap {
  width: min(1100px, 100% - 64px);
  margin: 0 auto;
  padding: 150px 0 60px;
}
.post {
  max-width: 760px;
  margin: 0 auto;
}
.back {
  display: inline-block;
  font: 500 14px var(--sans);
  color: var(--muted);
  margin-bottom: 40px;
  transition: color 0.5s var(--ease);
}
.back:hover {
  color: var(--accent);
}
.post-title {
  font: 400 64px/1.06 var(--serif);
  letter-spacing: -0.02em;
  margin: 22px 0 22px;
}
.post-title em {
  color: var(--accent);
}
.post-lede {
  font: italic 24px/34px var(--serif);
  color: var(--soft);
}
.post-art {
  margin: 44px 0 52px;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  height: 340px;
}
.post-art svg {
  width: 100%;
  height: 100%;
  display: block;
}
.prose p,
.prose li {
  font: 400 18.5px/32px var(--sans);
  color: var(--soft);
}
.prose p {
  margin: 0 0 24px;
}
.prose h2 {
  font: 400 40px/1.15 var(--serif);
  margin: 64px 0 18px;
  color: var(--fg);
}
.prose h3 {
  font: 400 28px/1.2 var(--serif);
  margin: 40px 0 12px;
}
.prose strong {
  color: var(--fg);
  font-weight: 600;
}
.prose em {
  font-family: var(--serif);
  font-size: 1.08em;
}
.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
}
.prose ul {
  margin: 0 0 26px;
  padding-left: 22px;
}
.prose li {
  margin-bottom: 8px;
}
.prose blockquote {
  margin: 36px 0;
  padding: 6px 0 6px 28px;
  border-left: 2px solid var(--accent);
  font: italic 28px/38px var(--serif);
  color: var(--fg);
}
.prose hr {
  border: 0;
  height: 1px;
  background: var(--line);
  margin: 56px 0;
}
.prose code {
  font:
    500 0.88em ui-monospace,
    Menlo,
    monospace;
  padding: 2px 6px;
  border-radius: 6px;
  background: color-mix(in srgb, var(--fg) 8%, transparent);
}
.author {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 72px;
  padding: 24px 28px;
  border: 1px solid var(--line);
  border-radius: 16px;
}
.author .av {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font: 500 15px var(--sans);
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
}
.author .who {
  flex: 1;
}
.author .who b {
  display: block;
  font: 500 16px var(--sans);
}
.author .who span {
  font: 400 14px var(--sans);
  color: var(--muted);
}
.author-links {
  display: flex;
  gap: 14px;
}
.author-links a {
  color: var(--soft);
  transition: color 0.5s var(--ease);
}
.author-links a:hover {
  color: var(--accent);
}
.post-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin-top: 28px;
}
.post-nav a {
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 14px;
  font: 400 22px/1.25 var(--serif);
  transition:
    border-color 0.7s var(--ease),
    transform 0.9s var(--ease);
}
.post-nav a:hover {
  border-color: var(--accent);
  transform: translate3d(0, -4px, 0);
}
.post-nav a span {
  display: block;
  font: 500 11.5px var(--sans);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}
.notes-index .post-title {
  font-size: 72px;
}
.notes-index {
  max-width: 1100px;
}
footer.page-foot {
  position: static;
  color: var(--fg);
  border-top: 1px solid var(--line);
  margin-top: 60px;
}
.pf-in {
  width: min(1100px, 100% - 64px);
  margin: 0 auto;
  padding: 34px 0 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.pf-in b {
  display: block;
  font: 500 15px var(--sans);
}
.pf-in div span {
  font: 400 13px var(--sans);
  color: var(--muted);
}
.pf-in nav {
  display: flex;
  gap: 24px;
}
.pf-in nav a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font: 500 14px var(--sans);
  color: var(--soft);
}
.pf-in nav a:hover {
  color: var(--accent);
}
body.page .nav {
  position: fixed;
}

@media (max-width: 900px) {
  .facts {
    grid-template-columns: 1fr;
  }
}
@media (prefers-reduced-motion: reduce) {
  .cstage .tree,
  .fp,
  .fp-in {
    animation: none;
  }
  .fp {
    display: none;
  }
  .car-track {
    scroll-behavior: auto;
  }
}
.notes-index .carousel {
  margin-top: 48px;
}

/* ---- scroll-linked effects on the compositor (no per-frame JavaScript) ---- */
@supports (animation-timeline: scroll()) {
  .progress {
    transform: scaleX(0);
    animation: progress-grow linear both;
    animation-timeline: scroll(root block);
  }
  @keyframes progress-grow {
    to {
      transform: scaleX(1);
    }
  }
}

/* ---- company marks in the journey ---- */
.co-logo {
  width: 54px;
  height: 54px;
  margin: 14px 0 4px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  color: var(--accent);
  background: linear-gradient(
    145deg,
    color-mix(in srgb, var(--accent) 18%, transparent),
    color-mix(in srgb, var(--accent) 5%, transparent)
  );
  border: 1px solid color-mix(in srgb, var(--accent) 34%, transparent);
  box-shadow: 0 0 28px color-mix(in srgb, var(--accent) 14%, transparent);
  font: 400 24px/1 var(--serif);
  letter-spacing: 0.02em;
}
.co-logo img {
  width: 30px;
  height: 30px;
  object-fit: contain;
}
:root[data-theme='dark'] .co-logo img {
  filter: brightness(0) invert(1) opacity(0.92);
}
:root[data-theme='light'] .co-logo img {
  filter: brightness(0) opacity(0.78);
}

/* builder steps: counter · icon · text on one row */
.steps li {
  grid-template-columns: 30px 40px 1fr;
  gap: 0 14px;
  align-items: start;
}
.steps li:before {
  grid-row: auto;
  padding-top: 9px;
}
.steps li b {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
  font: inherit;
}
.steps li span {
  font-size: inherit;
  line-height: inherit;
}
.bridge span {
  line-height: 1.35;
}

/* ?lite — diagnostic: no ambient animation at all (see lib/dom.js) */
.lite *,
.lite *:before,
.lite *:after {
  animation: none !important;
}
.lite .fp {
  display: none;
}
.lite .intro,
.lite .earthwrap canvas {
  opacity: 1 !important;
}
.lite .veil {
  display: none;
}

/* ---- header: a proper wordmark and calmer links ---- */
.word {
  white-space: nowrap;
  font: 400 36px/1 var(--serif);
  letter-spacing: -0.015em;
  text-transform: none;
  color: var(--fg);
  transition: opacity 0.6s var(--ease);
}
.word i {
  font-style: italic;
  color: var(--accent);
}
.word:hover {
  opacity: 0.8;
}
.links {
  gap: 34px;
  font: 450 14.5px var(--sans);
  letter-spacing: 0.01em;
}
.resume {
  font: 500 13.5px var(--sans);
  letter-spacing: 0.01em;
}

/* ---- content protection (see ui/protect.js) ---- */
body {
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}
img,
svg,
canvas {
  -webkit-user-drag: none;
  user-drag: none;
}

/* ---- the library: glass shelves lit from within, book spines tinted by the theme ---- */
.shelves {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 38px;
  margin-top: 44px;
}
.shelf-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 14px 6px;
}
.shelf-head h3 {
  font: 400 32px/1 var(--serif);
  letter-spacing: -0.01em;
}
.shelf-head span {
  font: 500 12px var(--sans);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.shelf-wall {
  position: relative;
  padding: 30px 28px 0;
  border: 1px solid color-mix(in srgb, var(--fg) 12%, transparent);
  border-bottom: 0;
  border-radius: 20px 20px 0 0;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--accent) 7%, transparent),
    color-mix(in srgb, var(--fg) 1.5%, transparent) 70%
  );
  overflow: hidden;
}
.shelf-wall:before {
  /* a pool of light behind the books */
  content: '';
  position: absolute;
  left: 8%;
  top: -90px;
  width: 520px;
  height: 300px;
  background: radial-gradient(closest-side, color-mix(in srgb, var(--accent) 20%, transparent), transparent);
  pointer-events: none;
}
.shelf-row {
  position: relative;
  display: flex;
  align-items: flex-end;
  gap: 5px;
  min-height: 262px;
  overflow-x: auto;
  overflow-y: hidden;
  padding-top: 36px;
  scrollbar-width: none;
}
.shelf-row::-webkit-scrollbar {
  display: none;
}
.shelf-plank {
  /* a glowing edge, like a shelf of light */
  position: relative;
  height: 8px;
  border-radius: 0 0 14px 14px;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--accent) 55%, var(--bg)),
    color-mix(in srgb, var(--accent) 18%, var(--bg))
  );
  box-shadow:
    0 14px 34px -10px color-mix(in srgb, var(--accent) 55%, transparent),
    inset 0 1px 0 rgb(255 255 255 / 0.28);
}

.book {
  --w: 54px;
  --h: 220px;
  --c: var(--accent);
  position: relative;
  flex: none;
  width: var(--w);
  height: var(--h);
  padding: 0;
  border: 0;
  border-radius: 4px 4px 1px 1px;
  cursor: pointer;
  color: #fff;
  background:
    linear-gradient(90deg, rgb(0 0 0 / 0.3), transparent 22%, transparent 76%, rgb(255 255 255 / 0.12)),
    linear-gradient(180deg, color-mix(in srgb, var(--c) 62%, #141826), color-mix(in srgb, var(--c) 44%, #0d1019));
  box-shadow:
    inset 0 0 0 1px rgb(255 255 255 / 0.12),
    0 6px 14px -6px rgb(0 0 0 / 0.5);
  transform-origin: 50% 100%;
  transition:
    transform 0.9s var(--ease),
    box-shadow 0.9s var(--ease);
  -webkit-tap-highlight-color: transparent;
}
.book:before,
.book:after {
  /* the printed bands near the head and tail of the spine */
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 8px;
  border-block: 1px solid rgb(255 255 255 / 0.38);
}
.book:before {
  top: 12px;
}
.book:after {
  bottom: 12px;
}
.book .sp-ic {
  position: absolute;
  top: 28px;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0.88;
}
.book .sp-t {
  position: absolute;
  left: 4px;
  right: 4px;
  top: 52px;
  bottom: 30px;
  display: block;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font: 400 15px/1.2 var(--serif);
  letter-spacing: 0.02em;
  text-align: center;
  white-space: normal;
  overflow: hidden;
  color: #f4f6fb;
  text-shadow: 0 1px 3px rgb(0 0 0 / 0.65);
}
.book:hover,
.book:focus-visible {
  transform: translate3d(0, -12px, 0);
  outline: none;
  box-shadow:
    inset 0 0 0 1px rgb(255 255 255 / 0.2),
    0 18px 30px -10px color-mix(in srgb, var(--c) 50%, transparent);
}
.book.pulled {
  transform: translate3d(0, -26px, 0) rotate(-2deg);
  box-shadow:
    inset 0 0 0 1px rgb(255 255 255 / 0.28),
    0 24px 40px -10px color-mix(in srgb, var(--c) 75%, transparent);
}
.book.filler {
  cursor: default;
  pointer-events: none;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--c) 22%, transparent),
    color-mix(in srgb, var(--c) 8%, transparent)
  );
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--fg) 9%, transparent);
}
.book.filler:before,
.book.filler:after {
  border-color: color-mix(in srgb, var(--fg) 12%, transparent);
}
.book.filler {
  transform: rotate(var(--tilt, 0deg));
}
.book.filler.leaning {
  transform-origin: 100% 100%;
  margin-right: 6px;
}
.cluster {
  position: relative;
  flex: none;
  display: flex;
  align-items: flex-end;
  gap: 5px;
}
.flat,
.pile .flat {
  position: relative;
  display: block;
  width: var(--fw);
  height: var(--fh);
  border-radius: 3px 5px 5px 3px;
  transform: rotate(var(--ft));
  background:
    linear-gradient(180deg, rgb(255 255 255 / 0.16), transparent 40%, rgb(0 0 0 / 0.22)),
    linear-gradient(
      180deg,
      color-mix(in srgb, var(--c) 40%, transparent),
      color-mix(in srgb, var(--c) 26%, transparent)
    );
  box-shadow:
    inset 0 0 0 1px color-mix(in srgb, var(--fg) 11%, transparent),
    0 4px 8px -4px rgb(0 0 0 / 0.5);
}
.flat:before {
  /* the page block, seen from the open side */
  content: '';
  position: absolute;
  right: 0;
  top: 3px;
  bottom: 3px;
  width: 78%;
  border-radius: 0 3px 3px 0;
  background: repeating-linear-gradient(
    180deg,
    color-mix(in srgb, var(--fg) 30%, transparent) 0 1px,
    transparent 1px 3px
  );
  opacity: 0.55;
}
.flat:after {
  /* a band on the spine end */
  content: '';
  position: absolute;
  left: 9px;
  top: 0;
  bottom: 0;
  width: 5px;
  border-inline: 1px solid rgb(255 255 255 / 0.25);
}
.cluster > .flat {
  position: absolute;
  left: -7px;
  bottom: 150px;
}
.pile {
  flex: none;
  align-self: flex-end;
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  margin: 0 6px;
}
.pile .flat {
  margin-top: 0;
}
.book.soon {
  background: transparent;
  box-shadow: inset 0 0 0 1.5px color-mix(in srgb, var(--fg) 22%, transparent);
  border-radius: 4px;
  cursor: default;
  color: var(--muted);
}
.book.soon:before,
.book.soon:after {
  border-color: transparent;
}
.book.soon .sp-t {
  color: var(--soft);
  text-shadow: none;
  font-style: italic;
}
.book.soon:hover {
  transform: none;
  box-shadow: inset 0 0 0 1.5px color-mix(in srgb, var(--fg) 22%, transparent);
}
.bookend {
  flex: none;
  align-self: flex-end;
  width: 30px;
  height: 84px;
  margin-left: 8px;
  border-radius: 6px 6px 0 0;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--fg) 20%, transparent),
    color-mix(in srgb, var(--fg) 6%, transparent)
  );
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--fg) 14%, transparent);
}

/* the opened book: a glass panel that grows out of the spine */
.lib-pop {
  position: fixed;
  inset: 0;
  z-index: 400;
  display: grid;
  place-items: center;
  padding: 24px;
  perspective: 1600px;
}
.lib-pop[hidden] {
  display: none;
}
.lib-scrim {
  position: absolute;
  inset: 0;
  background: rgb(var(--bg-rgb) / 0.84);
  opacity: 0;
  transition: opacity 0.7s var(--ease);
}
.lib-pop.on .lib-scrim {
  opacity: 1;
}
body.lib-open {
  overflow: hidden;
}
.book-open {
  position: relative;
  width: min(920px, 100%);
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  border: 1px solid color-mix(in srgb, var(--c) 45%, transparent);
  border-radius: 24px;
  color: var(--fg);
  background:
    radial-gradient(circle at 18% 0%, color-mix(in srgb, var(--c) 22%, transparent), transparent 60%),
    linear-gradient(160deg, color-mix(in srgb, var(--bg) 90%, var(--fg) 6%), var(--bg));
  box-shadow:
    0 60px 120px -40px color-mix(in srgb, var(--c) 45%, #000),
    0 0 0 1px rgb(0 0 0 / 0.2);
  transform-origin: 50% 50%;
  transform: translate3d(var(--dx), var(--dy), 0) scale(0.14) rotateY(-55deg);
  opacity: 0;
  transition:
    transform 0.95s var(--ease),
    opacity 0.5s var(--ease);
  will-change: transform;
}
.lib-pop.on .book-open {
  transform: none;
  opacity: 1;
}
.book-open:before {
  /* the spine line between the two pages */
  content: '';
  position: absolute;
  left: 46.5%;
  top: 28px;
  bottom: 28px;
  width: 1px;
  background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--c) 70%, transparent), transparent);
  pointer-events: none;
}
.pg {
  position: relative;
  padding: 48px;
  min-height: 420px;
}
.pg-l {
  display: grid;
  place-items: center;
}
.pg-r {
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.ribbon {
  position: absolute;
  right: 44px;
  top: 0;
  width: 18px;
  height: 64px;
  background: var(--c);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 80%, 0 100%);
}
.bo-x {
  position: absolute;
  top: -14px;
  right: -14px;
  z-index: 3;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--fg) 30%, transparent);
  border-radius: 50%;
  background: var(--bg);
  color: var(--fg);
  cursor: pointer;
  box-shadow: 0 10px 24px rgb(0 0 0 / 0.4);
  transition:
    transform 0.6s var(--ease),
    border-color 0.6s var(--ease);
}
.bo-x:hover {
  transform: rotate(90deg);
  border-color: var(--accent);
}
.cover {
  position: relative;
  width: 190px;
  height: 262px;
  padding: 24px 20px 20px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-radius: 4px 12px 12px 4px;
  color: #fff;
  background:
    linear-gradient(90deg, rgb(0 0 0 / 0.4), rgb(255 255 255 / 0.1) 7%, transparent 14%),
    linear-gradient(160deg, color-mix(in srgb, var(--c) 66%, #141826), color-mix(in srgb, var(--c) 42%, #0b0e17));
  box-shadow:
    0 30px 50px -18px color-mix(in srgb, var(--c) 60%, #000),
    inset 0 0 0 1px rgb(255 255 255 / 0.14);
}
.cover b {
  font: 400 22px/1.15 var(--serif);
  color: #f7f8fc;
  text-shadow: 0 1px 3px rgb(0 0 0 / 0.55);
}
.cover small {
  font: 600 10px var(--sans);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgb(247 248 252 / 0.82);
}
.ld-kind {
  display: flex;
  align-items: center;
  gap: 10px;
  font: 600 11px var(--sans);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}
.ld-free {
  padding: 3px 9px;
  border-radius: 99px;
  color: var(--bg);
  background: var(--c);
  font-size: 10px;
}
.pg-r h3 {
  font: 400 clamp(28px, 3vw, 40px) / 1.1 var(--serif);
  letter-spacing: -0.015em;
  margin: 14px 0 8px;
}
.ld-by {
  font: 500 14px var(--sans);
  color: color-mix(in srgb, var(--c) 80%, var(--fg));
}
.pg-r p {
  font: 400 16px/26px var(--sans);
  color: var(--soft);
  margin: 16px 0 26px;
}
.pg-r .btn {
  align-self: flex-start;
  border-color: var(--c);
  background: color-mix(in srgb, var(--c) 18%, transparent);
}
@media (max-width: 700px) {
  .shelf-wall {
    padding: 24px 16px 0;
  }
  .shelf-head h3 {
    font-size: 26px;
  }
  .lib-pop {
    align-items: end;
    padding: 12px;
  }
  .book-open {
    grid-template-columns: 1fr;
    max-height: calc(100svh - 36px);
    overflow: auto;
    border-radius: 20px;
  }
  .book-open:before {
    display: none;
  }
  .pg {
    padding: 28px 24px;
    min-height: 0;
  }
  .pg-l {
    padding-bottom: 8px;
  }
  .cover {
    width: 130px;
    height: 180px;
    padding: 16px 12px 14px 20px;
  }
  .cover b {
    font-size: 16px;
  }
  .bo-x {
    top: 8px;
    right: 8px;
  }
  .ribbon {
    right: 24px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .book-open {
    transition: opacity 0.3s;
    transform: none;
  }
}

/* ---- the résumé, as the header's call to action ---- */
.nav .resume {
  position: relative;
  overflow: hidden;
  gap: 8px;
  padding: 9px 18px;
  border: 0;
  border-radius: 99px;
  font: 600 13.5px var(--sans);
  letter-spacing: 0.01em;
  color: var(--bg);
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 55%, var(--warm)));
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--accent) 60%, transparent),
    0 10px 28px -10px color-mix(in srgb, var(--accent) 80%, transparent);
  transition:
    transform 0.7s var(--ease),
    box-shadow 0.7s var(--ease);
}
.nav .resume:hover {
  transform: translate3d(0, -2px, 0);
  box-shadow:
    0 0 0 1px var(--accent),
    0 16px 34px -10px color-mix(in srgb, var(--accent) 90%, transparent);
}
.nav .resume:after {
  /* a slow sheen that passes over the button */
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 35%, rgb(255 255 255 / 0.45) 50%, transparent 65%);
  transform: translate3d(-120%, 0, 0);
  animation: sheen 7s ease-in-out 3s infinite;
}
@keyframes sheen {
  0%,
  70% {
    transform: translate3d(-120%, 0, 0);
  }
  100% {
    transform: translate3d(120%, 0, 0);
  }
}
@media (prefers-reduced-motion: reduce) {
  .nav .resume:after {
    animation: none;
  }
}

@media (max-width: 900px) {
  .nav .resume {
    padding: 7px 13px;
    font-size: 12.5px;
  }
}
@media (max-width: 420px) {
  .word {
    font-size: 27px;
  }
  .actions {
    gap: 8px;
  }
}

/* ---- course pages: the index, and (later) lessons ---- */
.course {
  max-width: 880px;
  margin: 0 auto;
}
.course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin: 30px 0 54px;
  padding: 18px 22px;
  border: 1px solid color-mix(in srgb, var(--fg) 14%, transparent);
  border-radius: 16px;
  font: 500 13px var(--sans);
  letter-spacing: 0.04em;
  color: var(--muted);
  background: color-mix(in srgb, var(--fg) 3%, transparent);
}
.course-meta b {
  font: 400 28px/1 var(--serif);
  color: var(--fg);
  margin-right: 6px;
  letter-spacing: -0.01em;
}
.cmod {
  margin-bottom: 44px;
}
.cmod header {
  display: flex;
  align-items: flex-start;
  gap: 22px;
  margin-bottom: 14px;
}
.cm-n {
  flex: none;
  font: 400 52px/0.9 var(--serif);
  color: color-mix(in srgb, var(--accent) 70%, transparent);
  min-width: 64px;
}
.cmod h2 {
  font: 400 34px/1.1 var(--serif);
  letter-spacing: -0.015em;
}
.cmod header p {
  font: 400 15px/24px var(--sans);
  color: var(--soft);
  margin-top: 6px;
}
.cmod ol {
  list-style: none;
  margin: 0 0 0 86px;
  padding: 0;
  border-left: 1px solid color-mix(in srgb, var(--fg) 14%, transparent);
}
.cl {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 14px 18px;
  font: 400 17px/24px var(--sans);
  color: var(--soft);
  border-radius: 0 12px 12px 0;
  transition:
    background-color 0.6s var(--ease),
    color 0.6s var(--ease),
    padding 0.8s var(--ease);
}
.cl i {
  flex: none;
  min-width: 34px;
  font: 600 12px var(--sans);
  font-style: normal;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.cl span {
  flex: 1;
}
.cl em {
  flex: none;
  font: 600 10px var(--sans);
  font-style: normal;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 99px;
  border: 1px dashed color-mix(in srgb, var(--fg) 24%, transparent);
  color: var(--muted);
}
.cl.ready {
  color: var(--fg);
}
.cl.ready em {
  border: 1px solid var(--accent);
  color: var(--bg);
  background: var(--accent);
}
.cl.ready:hover {
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  padding-left: 26px;
}
.pn-soon {
  padding: 22px 24px;
  border: 1px dashed color-mix(in srgb, var(--fg) 20%, transparent);
  border-radius: 14px;
  font: 400 22px/1.25 var(--serif);
  color: var(--muted);
}
.pn-soon span {
  display: block;
  font: 500 11.5px var(--sans);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.pn-soon em {
  font-style: normal;
  font: 500 12px var(--sans);
}
@media (max-width: 700px) {
  .cm-n {
    font-size: 38px;
    min-width: 44px;
  }
  .cmod h2 {
    font-size: 27px;
  }
  .cmod header {
    gap: 14px;
  }
  .cmod ol {
    margin-left: 0;
    border-left: 0;
  }
  .cl {
    padding: 12px 6px;
    font-size: 15.5px;
  }
}

/* the plain list that stands in for the shelves until (or without) JavaScript */
.blog-list {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.blog-list a {
  font: 400 26px/1.2 var(--serif);
  color: var(--fg);
}
.blog-list span {
  display: block;
  font: 400 15px/24px var(--sans);
  color: var(--soft);
  margin-top: 4px;
}
.notes-index .lib {
  margin-top: 30px;
}

/* ---- visitor count (footer) ---- */
.visitors {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-right: 18px;
  font: 500 12px var(--sans);
  letter-spacing: 0.04em;
  color: var(--ffg, var(--soft));
  opacity: 0.85;
}
.visitors[hidden] {
  display: none;
}
.visitors b {
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}