/* ------------------------------------------------------------------
   Base
   ------------------------------------------------------------------ */

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

html {
  scroll-behavior: smooth;
  scrollbar-gutter: stable;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: var(--step-0);
  font-weight: 300;
  line-height: 1.55;
  font-synthesis: none;
  -moz-osx-font-smoothing: grayscale;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--dim-dur) var(--ease), color var(--dim-dur) var(--ease);
  overflow-x: hidden;
}

h1, h2, h3, p, figure, ol, ul, dl, dd { margin: 0; }
ol, ul { padding: 0; list-style: none; }
img { max-width: 100%; }
button, input { font: inherit; color: inherit; }

a {
  color: inherit;
  text-decoration: none;
}

::selection {
  background: var(--accent);
  color: var(--ground);
}

:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 4px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--ground);
  color: var(--ink);
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 11px;
}
.skip:focus { left: 12px; top: 12px; }

/* Paper grain. Static, cheap, and below the header. */
.grain {
  position: fixed;
  inset: -20%;
  z-index: 90;
  pointer-events: none;
  opacity: 0.055;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ------------------------------------------------------------------
   Header
   ------------------------------------------------------------------ */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 var(--gutter);
  background: color-mix(in srgb, var(--ground) 80%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--rule) 72%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition:
    background-color var(--dim-dur) var(--ease),
    border-color var(--dim-dur) var(--ease);
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  white-space: nowrap;
}
.wordmark::before {
  content: "";
  width: 7px;
  height: 7px;
  background: var(--accent);
  transition: background-color var(--dim-dur) var(--ease);
}

.site-nav {
  display: flex;
  gap: clamp(14px, 2vw, 30px);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.site-nav a {
  color: var(--muted);
  transition: color var(--dur) var(--ease);
}
.site-nav a:hover,
.site-nav a:focus-visible { color: var(--ink); }

.header-meta {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}
.header-meta b { color: var(--ink); font-weight: 400; }

@media (max-width: 760px) {
  .header-meta { display: none; }
}

/* ------------------------------------------------------------------
   Grid and scene
   ------------------------------------------------------------------ */

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 0 var(--gap);
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.scene {
  position: relative;
  padding-block: clamp(64px, 10vh, 130px);
}

.label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ------------------------------------------------------------------
   Hero
   ------------------------------------------------------------------ */

.hero {
  position: relative;
  overflow: hidden;
}

.hero-parallax {
  position: absolute;
  /* Positions it into the upper-right negative space on desktop */
  top: 6vh;
  right: 4vw;
  width: clamp(320px, 42vw, 640px);
  aspect-ratio: 1 / 1;
  pointer-events: none;
  z-index: 0;
  color: var(--ink, #161514);
}

.hero .grid {
  position: relative;
  z-index: 1;
}

.parallax-layer {
  position: absolute;
  inset: 0;
  will-change: transform;
  transition: transform 0.15s cubic-bezier(0.22, 1, 0.36, 1);
}

.parallax-hud {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 18%;
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  opacity: 0.4;
}

@media (max-width: 900px) {
  .hero-parallax {
    opacity: 0.35;
    right: -15vw;
    top: 2vh;
  }
}
.hero {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  padding: calc(var(--header-h) + 10vh) 0 6vh;
}
.hero .grid { row-gap: clamp(24px, 4vh, 44px); align-items: end; }

.hero-kicker { grid-column: 1 / span 7; }

.hero-title {
  grid-column: 1 / -1;
  font-size: var(--step-5);
  font-weight: 300;
  line-height: 1.02;
  letter-spacing: -0.045em;
  text-wrap: balance;
  max-width: 17ch;
}
.hero-title em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 300;
  letter-spacing: -0.02em;
}

.hero-sub {
  grid-column: 1 / span 4;
  font-size: var(--step-1);
  line-height: 1.35;
  color: color-mix(in srgb, var(--ink) 78%, transparent);
  max-width: 32ch;
  text-wrap: pretty;
}

.hero-side { grid-column: 9 / span 4; }

.dim-index {
  border-top: 1px solid var(--rule);
  padding-top: 6px;
}
.dim-index a {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: baseline;
  padding: 8px 0;
  border-bottom: 1px solid color-mix(in srgb, var(--rule) 55%, transparent);
  font-size: var(--step-0);
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease);
}
.dim-index a:hover { transform: translateX(5px); color: var(--accent); }
.dim-index .y {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--muted);
}
.dim-index .y { text-align: right; }

.scroll-cue {
  grid-column: 1 / span 3;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.scroll-cue i {
  display: block;
  width: 1px;
  height: 38px;
  background: currentColor;
  transform-origin: top;
  animation: cue 2.4s var(--ease-inout) infinite;
}
@keyframes cue {
  0%, 100% { transform: scaleY(0.25); opacity: 0.4; }
  50%      { transform: scaleY(1); opacity: 1; }
}

/* Load reveal */
.rise {
  display: block;
  overflow: hidden;
}
.rise > span {
  display: block;
  transform: translateY(105%);
  animation: rise 950ms var(--ease) forwards;
  animation-delay: calc(var(--i, 0) * 90ms);
}
.hero-title .rise {
  padding-bottom: 0.09em;
  margin-bottom: -0.09em;
}
@keyframes rise { to { transform: translateY(0); } }

/* ------------------------------------------------------------------
   Acts
   ------------------------------------------------------------------ */

.act { position: relative; scroll-margin-top: var(--header-h); }

.act-head {
  min-height: 86vh;
  min-height: 86svh;
  display: flex;
  align-items: center;
  padding-block: 14vh;
  border-top: 1px solid var(--rule);
}


.act-copy { grid-column: 4 / span 5; }
.act-name {
  font-size: clamp(2.2rem, 1.25rem + 3.5vw, 4.8rem);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.035em;
  text-wrap: balance;
}
.act-thesis {
  margin-top: 20px;
  max-width: 36ch;
  font-size: var(--step-1);
  line-height: 1.4;
  color: var(--muted);
}


/* ------------------------------------------------------------------
   Chapters
   ------------------------------------------------------------------ */

.chapter {
  min-height: 92vh;
  min-height: 92svh;
  display: flex;
  align-items: center;
  padding-block: 10vh;
  border-top: 1px solid color-mix(in srgb, var(--rule) 60%, transparent);
  scroll-margin-top: var(--header-h);
}

.chapter-figure { grid-column: 1 / span 6; grid-row: 1; }
.chapter-copy   { grid-column: 8 / span 4; grid-row: 1; }

.chapter--flip .chapter-figure { grid-column: 7 / span 6; }
.chapter--flip .chapter-copy   { grid-column: 1 / span 4; }

.chapter--text { min-height: 68vh; min-height: 68svh; }
.chapter--text .chapter-copy { grid-column: 4 / span 5; }

.plate {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: color-mix(in srgb, var(--ink) 5%, transparent);
  border: 1px solid var(--rule);
}
.plate img {
  display: block;
  width: 100%;
  height: auto;
}

.plate-caption {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.chapter-title {
  margin: 12px 0 16px;
  font-size: var(--step-2);
  font-weight: 300;
  line-height: 1.04;
  letter-spacing: -0.025em;
  text-wrap: balance;
}
.chapter-body {
  max-width: 46ch;
  color: color-mix(in srgb, var(--ink) 82%, transparent);
  text-wrap: pretty;
}
.chapter-stack {
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: var(--stack-size);
  line-height: 1.5;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Receipt */
.receipt {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 16px;
  margin-top: 24px;
  padding-top: 12px;
  border-top: 1px solid var(--rule);
}
.receipt-value {
  font-size: var(--step-1);
  font-weight: 300;
  letter-spacing: -0.015em;
  line-height: 1.2;
}
.receipt-state {
  align-self: center;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  white-space: nowrap;
  transition: color var(--dim-dur) var(--ease);
}





/* ------------------------------------------------------------------
   End card
   ------------------------------------------------------------------ */

.end {
  min-height: 88vh;
  min-height: 88svh;
  display: flex;
  align-items: center;
  padding-block: 12vh calc(var(--scrubber-h) + 8vh);
  border-top: 1px solid var(--rule);
}
.end-title {
  grid-column: 1 / span 8;
  font-size: var(--step-4);
  font-weight: 300;
  line-height: 0.98;
  letter-spacing: -0.04em;
  text-wrap: balance;
}
.end-title em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 300;
}
.end-copy {
  grid-column: 1 / span 5;
  margin-top: 30px;
  color: color-mix(in srgb, var(--ink) 80%, transparent);
  max-width: 44ch;
}
.end-contact {
  grid-column: 1 / span 12;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 32px;
  margin-top: 46px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.end-contact a { border-bottom: 1px solid transparent; }
.end-contact a:hover { border-color: var(--ink); }
.end-contact .spacer { flex: 1; }
.end-contact .muted { color: var(--muted); }

/* ------------------------------------------------------------------
   Reveal
   ------------------------------------------------------------------ */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 720ms var(--ease), transform 720ms var(--ease);
  transition-delay: var(--d, 0ms);
}
.reveal.is-in { opacity: 1; transform: none; }

/* ------------------------------------------------------------------
   Case study
   ------------------------------------------------------------------ */

.read-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  z-index: 120;
  pointer-events: none;
}
.read-progress span {
  display: block;
  height: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: background-color var(--dim-dur) var(--ease);
}

.case-note {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid color-mix(in srgb, var(--rule) 75%, transparent);
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
  max-width: 62ch;
}

.case-hero {
  min-height: 92vh;
  min-height: 92svh;
  display: flex;
  align-items: flex-end;
  padding: calc(var(--header-h) + 14vh) 0 8vh;
  scroll-margin-top: var(--header-h);
}
.case-hero .grid { row-gap: 28px; align-items: end; }
.case-kicker { grid-column: 1 / span 8; }
.case-title {
  grid-column: 1 / span 10;
  font-size: var(--step-4);
  font-weight: 300;
  line-height: 0.98;
  letter-spacing: -0.04em;
  text-wrap: balance;
}
.case-lede {
  grid-column: 1 / span 5;
  font-size: var(--step-1);
  line-height: 1.4;
  color: color-mix(in srgb, var(--ink) 80%, transparent);
  max-width: 40ch;
}
.case-meta {
  grid-column: 8 / span 5;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 24px;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
}
.case-meta div { display: grid; gap: 4px; }
.case-meta dt {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.case-meta dd { margin: 0; font-size: 13px; line-height: 1.4; }

.case-section {
  padding-block: clamp(64px, 11vh, 140px);
  border-top: 1px solid var(--rule);
  scroll-margin-top: var(--header-h);
}
.case-label { grid-column: 1 / span 2; }
.case-content { grid-column: 4 / span 6; }
.case-content h2 {
  font-size: var(--step-2);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 22px;
  text-wrap: balance;
}
.case-content p {
  max-width: 62ch;
  margin-bottom: 18px;
  color: color-mix(in srgb, var(--ink) 84%, transparent);
  text-wrap: pretty;
}
.case-content p:last-child { margin-bottom: 0; }
.case-content code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: color-mix(in srgb, var(--ink) 6%, transparent);
  padding: 0.1em 0.35em;
}
.case-wide { grid-column: 1 / -1; margin-top: 44px; }

.pull {
  grid-column: 1 / span 9;
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 300;
  font-size: var(--step-3);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 48px 0;
  text-wrap: balance;
}

.notes { display: grid; gap: 22px; }
.note {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 14px;
  padding-top: 14px;
  border-top: 1px solid color-mix(in srgb, var(--rule) 70%, transparent);
}
.note span {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--accent);
  padding-top: 3px;
}
.note p { margin: 0; }

.evidence {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.evidence th,
.evidence td {
  text-align: left;
  padding: 12px 16px 12px 0;
  border-bottom: 1px solid color-mix(in srgb, var(--rule) 70%, transparent);
  vertical-align: top;
}
.evidence th {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.evidence td:last-child {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}
.evidence .m { color: var(--accent); }
.evidence .u { color: var(--muted); }

.case-footer {
  padding-block: 10vh 8vh;
  border-top: 1px solid var(--rule);
}
.case-footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.case-footer a:hover { color: var(--accent); }

/* ------------------------------------------------------------------
   Byte-range instrument
   ------------------------------------------------------------------ */

.panel {
  border: 1px solid var(--rule);
  background: color-mix(in srgb, var(--ink) 3%, transparent);
  overflow: hidden;
}
.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.panel svg { display: block; width: 100%; height: auto; }
.panel text {
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  fill: currentColor;
  opacity: 0.55;
}
.panel .plane {
  fill: none;
  stroke: var(--rule);
  stroke-width: 0.6;
  transition: fill 120ms linear, stroke 120ms linear;
}
.panel .plane.is-on {
  stroke: var(--accent);
  stroke-width: 1.6;
  fill: color-mix(in srgb, var(--accent) 14%, transparent);
}
.panel-control {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 16px;
  border-top: 1px solid var(--rule);
}
.panel-control label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}
.panel-control input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  background: transparent;
}
.panel-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border-top: 1px solid var(--rule);
}
.panel-stats > div {
  background: var(--ground);
  padding: 12px 16px;
  transition: background-color var(--dim-dur) var(--ease);
}
.panel-stats dt {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.panel-stats dd {
  margin: 5px 0 0;
  font-size: var(--step-1);
  font-weight: 300;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
}

/* Scale invariant */
.scalecheck {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 28px;
  padding: clamp(20px, 3vw, 36px);
  border: 1px solid var(--rule);
}
.scalecheck-main { display: grid; gap: 8px; }
.scalecheck-value {
  font-size: var(--step-3);
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  transition: opacity var(--dur) var(--ease);
}
.scalecheck-note {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.scalecheck.is-unverified .scalecheck-value {
  opacity: 0.4;
  text-decoration: line-through;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
}
.toggle {
  padding: 10px 14px;
  border: 1px solid var(--rule);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.toggle:hover { border-color: var(--ink); }
.toggle[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); }

/* ------------------------------------------------------------------
   Responsive
   ------------------------------------------------------------------ */

@media (max-width: 1080px) {
  .act-copy { grid-column: 3 / span 5; }
  .chapter-figure { grid-column: 1 / span 6; }
  .chapter-copy { grid-column: 7 / span 5; }
  .chapter--flip .chapter-figure { grid-column: 7 / span 6; }
  .chapter--flip .chapter-copy { grid-column: 1 / span 5; }
  .chapter--text .chapter-copy { grid-column: 3 / span 6; }
}

@media (max-width: 860px) {
  .grid { grid-template-columns: 1fr; }
  .grid > * { grid-column: 1 / -1 !important; grid-row: auto !important; }

  .hero { min-height: auto; padding-top: calc(var(--header-h) + 16vh); }
  .hero-title { max-width: none; font-size: clamp(2.5rem, 10.5vw, 4.6rem); }
  .hero-side { margin-top: 12px; }
  .scroll-cue { margin-top: 8px; }

  .act-head { min-height: auto; padding-block: 12vh; }

  .chapter, .chapter--flip { min-height: auto; padding-block: 8vh; }
  .chapter-figure { margin-bottom: 28px; }

  .end { min-height: auto; padding-block: 14vh calc(var(--scrubber-h) + 8vh); }

  .case-hero { min-height: auto; padding-top: calc(var(--header-h) + 16vh); }
  .case-lede, .case-meta { margin-top: 8px; }
  .case-meta { grid-template-columns: 1fr 1fr; }
  .case-label { margin-bottom: 18px; }
  .pull { font-size: var(--step-2); }
  .panel-stats { grid-template-columns: 1fr; }
  .case-footer-inner { flex-direction: column; }

  /* Stack the evidence table rather than squeezing three columns. */
  .evidence thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
  }
  .evidence,
  .evidence tbody,
  .evidence tr,
  .evidence td { display: block; width: 100%; }
  .evidence tr {
    padding: 14px 0;
    border-bottom: 1px solid color-mix(in srgb, var(--rule) 70%, transparent);
  }
  .evidence td { border: 0; padding: 2px 0; }
  .evidence td:last-child { padding-top: 8px; white-space: normal; }
}

/* ------------------------------------------------------------------
   Motion preferences: remove movement, keep fades.
   ------------------------------------------------------------------ */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .rise > span { transform: none; }
  .reveal { opacity: 1; transform: none; }
  .scroll-cue i { transform: scaleY(0.6); }
}

/* ------------------------------------------------------------------
   Lessons / course
   ------------------------------------------------------------------ */

.lessons {
  padding: 10vh 0;
  border-top: 1px solid var(--rule);
}
.lessons .grid { row-gap: 20px; }
.lessons .label { grid-column: 1 / span 4; }
.lessons h2 {
  grid-column: 4 / span 6;
  margin: 0;
  font-size: var(--step-3);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.035em;
  text-wrap: balance;
}
.lessons-list {
  grid-column: 4 / span 6;
  margin: 0;
  padding: 0;
  list-style: none;
}
.lessons-list li {
  display: grid;
  grid-template-columns: 18ch 1fr;
  gap: 20px;
  padding: 16px 0;
  border-top: 1px solid var(--rule);
  font-size: 14px;
  line-height: 1.55;
  color: var(--muted);
}
.lessons-list b {
  color: var(--ink);
  font-weight: 500;
}
.course-cta {
  display: inline-flex;
  margin-top: 18px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.course-cta:hover { color: var(--accent); border-color: var(--accent); }

@media (max-width: 860px) {
  .lessons { padding: 8vh 0; }
  .lessons .label, .lessons h2, .lessons-list { grid-column: 1 / -1; }
  .lessons-list li { grid-template-columns: 1fr; gap: 6px; }
}