/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px) saturate(120%);
  -webkit-backdrop-filter: blur(10px) saturate(120%);
  background: rgba(255, 248, 238, 0.85);
  border-bottom: 1px solid var(--c-text-15);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
}
.brand__mark {
  font-family: var(--f-display);
  font-weight: 400;
  font-size: 20px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--c-text);
  font-variation-settings: "SOFT" 0, "opsz" 144;
}
.brand__sub {
  font-family: var(--f-sans);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-text);
  opacity: 0.85;
}
.nav__links {
  display: flex;
  align-items: center;
  gap: 34px;
  font-size: 14px;
  font-weight: 500;
}
/* :not(.btn) prevents this rule from killing button text colour */
.nav__links a:not(.btn) {
  position: relative;
  color: var(--c-text);
  opacity: 0.75;
  padding: 6px 0;
  transition: opacity 0.18s ease;
}
.nav__links a:not(.btn):hover { opacity: 1; }
.nav__links a:not(.btn)::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--c-copper);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s cubic-bezier(.2,.6,.2,1);
}
.nav__links a:not(.btn):hover::after { transform: scaleX(1); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 24px;
  border-radius: var(--r-pill);
  background: var(--c-text);
  color: var(--c-bg-light);
  font-family: var(--f-sans);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.01em;
  border: 1px solid var(--c-text);
  cursor: pointer;
  transition: transform 0.22s cubic-bezier(.2,.6,.2,1), box-shadow 0.22s ease, background 0.18s ease;
  white-space: nowrap;
}
.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px -14px rgba(32, 14, 3, 0.40);
}
.btn:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
}
.btn--lg { padding: 18px 34px; font-size: 15px; }
.btn .arrow { transition: transform 0.22s cubic-bezier(.2,.6,.2,1); }
.btn:hover .arrow { transform: translateX(4px); }

/* Hero */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
  background: var(--c-bg-light);
}
.hero__video {
  position: absolute;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  background: linear-gradient(135deg, #2a1408 0%, #4a2615 50%, #6b3520 100%);
}
.hero__video video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.hero__veil {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(32, 14, 3, 0.28) 0%, rgba(32, 14, 3, 0.05) 35%, rgba(32, 14, 3, 0.55) 100%),
    radial-gradient(120% 80% at 50% 50%, rgba(32, 14, 3, 0.10) 0%, rgba(32, 14, 3, 0.45) 100%);
}
.hero__inner {
  width: 100%;
  padding-top: 80px;
  padding-bottom: clamp(100px, 14vh, 160px);
  max-width: 980px;
  text-align: center;
  margin: 0 auto;
}
.hero h1 {
  color: var(--c-bg-light);
  margin-bottom: 28px;
  max-width: 920px;
  margin-left: auto;
  margin-right: auto;
}
.hero h1 em {
  font-style: italic;
  font-weight: 400;
  position: relative;
}
.hero__lede {
  font-size: clamp(16px, 1.45vw, 18px);
  line-height: 1.55;
  color: var(--c-bg-light);
  opacity: 0.88;
  max-width: 580px;
  margin: 0 auto 32px;
}
.hero__cta-row {
  display: flex;
  gap: 14px;
  justify-content: center;
}
.hero .btn {
  background: var(--c-bg-light);
  color: var(--c-text);
  border-color: var(--c-bg-light);
}
.hero .btn:hover { background: #fff; }
.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--f-sans);
  font-weight: 500;
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-bg-light);
  opacity: 0.6;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.hero__scroll-line {
  width: 1px;
  height: 36px;
  background: currentColor;
  animation: scrollPulse 2.2s ease-in-out infinite;
  transform-origin: top;
}
@keyframes scrollPulse {
  0%, 100% { transform: scaleY(0.4); opacity: 0.3; }
  50%      { transform: scaleY(1);   opacity: 1; }
}

/* Opening narrative */
.narrative {
  max-width: var(--maxw-narrow);
  margin: 0 auto;
}
.narrative h2 {
  margin-bottom: 32px;
  max-width: 640px;
}
.narrative p { font-size: 18px; line-height: 1.6; color: var(--c-text); }
.narrative p + p { margin-top: 16px; }
.narrative .pull {
  display: block;
  font-family: var(--f-display);
  font-weight: 500;
  font-size: clamp(26px, 3vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.012em;
  margin: 44px 0 28px;
  color: var(--c-text);
  border-left: 2px solid var(--c-copper);
  padding-left: 24px;
}
.narrative__cap {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(24px, 2.6vw, 30px);
  margin-top: 28px;
  letter-spacing: -0.01em;
}

.photo-band {
  margin-top: 80px;
  width: 100%;
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 16/7;
  background: var(--c-bg-dark);
  position: relative;
}
.photo-band img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Open Lab — timeline spine */
.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 80px;
}
.section-head h2 { margin-bottom: 0; }

/* Chapter progress — four dots indicate where in the journey you are.
   Teal fill on the active dot is the most visible teal touchpoint on the page. */
.chapter-progress {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin: -48px auto 64px;
}
.chapter-progress__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1.5px solid var(--c-text-30);
  background-color: transparent;
  transition: background-color 0.5s cubic-bezier(.2,.6,.2,1),
              border-color 0.5s cubic-bezier(.2,.6,.2,1),
              transform 0.5s cubic-bezier(.2,.6,.2,1);
}
.chapter-progress__dot.is-active {
  background-color: var(--c-accent);
  border-color: var(--c-accent);
  transform: scale(1.3);
}

.timeline {
  position: relative;
  padding-left: 0;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 30px;
  top: 24px;
  bottom: 24px;
  width: 1px;
  background: linear-gradient(180deg,
    transparent 0%,
    var(--c-copper) 8%,
    var(--c-copper) 92%,
    transparent 100%);
  opacity: 0.35;
}

.chapter {
  position: relative;
  display: grid;
  grid-template-columns: 60px 1fr 1.05fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
  padding: clamp(40px, 6vw, 64px) 0;
}
.chapter + .chapter {
  border-top: 1px dashed var(--c-text-15);
}
/* Explicit grid placement — `order` shuffled auto-placement into the wrong column,
   and `grid-column` alone left the media on row 2 because the auto-flow cursor had
   advanced. Pinning every item to row 1 keeps the three cells side-by-side. */
.chapter__marker { grid-column: 1; grid-row: 1; }
.chapter__copy   { grid-column: 2; grid-row: 1; }
.chapter__media  { grid-column: 3; grid-row: 1; }
.chapter--reverse { grid-template-columns: 60px 1.05fr 1fr; }
.chapter--reverse .chapter__copy  { grid-column: 3; grid-row: 1; }
.chapter--reverse .chapter__media { grid-column: 2; grid-row: 1; }

.chapter__marker {
  position: relative;
  width: 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
  align-self: center;
  z-index: 2;
}
.chapter__dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--c-bg-med);
  border: 2px solid var(--c-copper);
  position: relative;
  transition: transform 0.32s cubic-bezier(.2,.6,.2,1), background 0.32s ease;
}
.chapter:hover .chapter__dot {
  background: var(--c-copper);
  transform: scale(1.3);
}

.chapter__copy {
  align-self: center;
}
.chapter__tag {
  font-family: var(--f-sans);
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-copper);
  margin: 0 0 14px;
}
.chapter__title {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(28px, 3.2vw, 40px);
  line-height: 1.05;
  letter-spacing: -0.012em;
  margin: 0 0 16px;
  color: var(--c-text);
}
.chapter__body {
  font-size: 17px;
  line-height: 1.6;
  color: var(--c-text-70);
  margin: 0;
  max-width: 460px;
}
.chapter__body + .chapter__body { margin-top: 12px; }

.chapter__media {
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--c-bg-dark);
  position: relative;
}
.chapter__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s cubic-bezier(.2,.6,.2,1);
}
.chapter:hover .chapter__media img {
  transform: scale(1.03);
}
/* Right-shifted crop — used when the important visual sits on the right edge of the source */
.chapter__media--shift-right img {
  object-position: 100% center;
}

.open-lab__close {
  text-align: center;
  margin-top: clamp(50px, 7vw, 80px);
  position: relative;
}
.open-lab__close::before {
  content: "";
  display: block;
  width: 1px;
  height: 36px;
  background: var(--c-copper);
  margin: 0 auto 32px;
  opacity: 0.35;
}
.open-lab__close p {
  font-family: var(--f-display);
  font-weight: 500;
  font-style: italic;
  font-size: clamp(22px, 2.6vw, 30px);
  letter-spacing: -0.008em;
  color: var(--c-text);
  margin: 0;
}

/* Lab Report dashboard mock */
.lab-report {
  background: var(--c-bg-light);
  border-radius: var(--r-lg);
  padding: 28px 28px 24px;
  border: 1px solid var(--c-text-15);
  aspect-ratio: 4/3;
  display: flex;
  flex-direction: column;
  gap: 20px;
  box-shadow: 0 20px 60px -30px rgba(32, 14, 3, 0.25);
  position: relative;
  overflow: hidden;
}
.lab-report__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--c-text-15);
}
.lab-report__title {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.005em;
  color: var(--c-text);
}
.lab-report__meta {
  font-family: var(--f-sans);
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-text-55);
}
.lab-report__indexes {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 14px;
}
.idx-card {
  background: var(--c-bg-med);
  border-radius: var(--r-md);
  padding: 14px 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.idx-card__label {
  font-family: var(--f-sans);
  font-weight: 600;
  font-size: 9px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-text-55);
  line-height: 1.3;
}
.idx-card__val {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(22px, 2.6vw, 30px);
  letter-spacing: -0.01em;
  color: var(--c-text);
  line-height: 1;
}
.idx-card__bar {
  height: 4px;
  background: var(--c-text-08);
  border-radius: 99px;
  overflow: hidden;
  margin-top: 4px;
}
.idx-card__bar > span {
  display: block;
  height: 100%;
  background: var(--c-accent);
  border-radius: inherit;
  width: 0;
  transition: width 1.4s cubic-bezier(.2,.6,.2,1);
}
.is-revealed .idx-card__bar > span { width: var(--w, 70%); }
.idx-card--copper .idx-card__bar > span { background: var(--c-copper); }
.idx-card__delta {
  font-family: var(--f-sans);
  font-weight: 500;
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--c-accent);
}

.lab-report__chart {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 0;
}
.lab-report__chart-label {
  font-family: var(--f-sans);
  font-weight: 600;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-text-55);
}
.lab-report__chart svg {
  width: 100%;
  height: 100%;
  flex-grow: 1;
}
.lab-report__sparkline {
  stroke-dasharray: 1000;
  stroke-dashoffset: 1000;
  transition: stroke-dashoffset 2s cubic-bezier(.2,.6,.2,1);
}
.is-revealed .lab-report__sparkline { stroke-dashoffset: 0; }
.lab-report__sparkdot {
  opacity: 0;
  transition: opacity 0.4s ease 1.6s;
}
.is-revealed .lab-report__sparkdot { opacity: 1; }

.lab-report__foot {
  display: flex;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--c-text-15);
  font-family: var(--f-sans);
  font-size: 11px;
  color: var(--c-text-55);
  letter-spacing: 0.06em;
}
.lab-report__foot strong {
  display: block;
  color: var(--c-text);
  font-family: var(--f-display);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.005em;
  margin-bottom: 2px;
}

/* Always at your edge */
.edge {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.edge__copy { padding-top: 8px; }
.edge__copy h2 { margin-bottom: 24px; }
.edge__lede {
  font-size: 17px;
  color: var(--c-text-70);
  line-height: 1.55;
  margin: 0 0 14px;
}
.capacities {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.capacity {
  padding: 28px 0;
  border-top: 1px solid var(--c-text-15);
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 20px;
  align-items: start;
  transition: padding-left 0.3s cubic-bezier(.2,.6,.2,1);
}
.capacity:hover { padding-left: 6px; }
.capacity:last-child { border-bottom: 1px solid var(--c-text-15); }
.capacity__icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1.5px solid var(--c-text);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.32s ease, transform 0.32s cubic-bezier(.2,.6,.2,1);
}
.capacity:hover .capacity__icon {
  background: var(--c-text);
  transform: rotate(-4deg);
}
.capacity:hover .capacity__icon svg { stroke: var(--c-bg-light); }
.capacity__icon svg { display: block; transition: stroke 0.32s ease; }

/* Stroke-draw on viewport entry — adds a subtle moment to each capacity icon */
@media (prefers-reduced-motion: no-preference) {
  .capacity__icon svg circle,
  .capacity__icon svg rect,
  .capacity__icon svg path {
    stroke-dasharray: 80;
    stroke-dashoffset: 80;
    transition: stroke-dashoffset 1.1s cubic-bezier(.2,.6,.2,1);
  }
  .capacity.is-revealed .capacity__icon svg circle,
  .capacity.is-revealed .capacity__icon svg rect,
  .capacity.is-revealed .capacity__icon svg path {
    stroke-dashoffset: 0;
  }
  .capacity.reveal[data-delay="100"].is-revealed .capacity__icon svg * { transition-delay: 0.15s; }
  .capacity.reveal[data-delay="200"].is-revealed .capacity__icon svg * { transition-delay: 0.30s; }
}
.capacity__title {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(22px, 2.4vw, 28px);
  line-height: 1.2;
  letter-spacing: -0.008em;
  margin: 0 0 6px;
  color: var(--c-text);
}
.capacity__body {
  font-size: 15px;
  line-height: 1.55;
  color: var(--c-text-70);
  margin: 0;
}

/* Marquee */
.marquee {
  background: var(--c-copper);
  color: var(--c-bg-light);
  padding: 22px 0;
  overflow: hidden;
  border-top: 1px solid var(--c-text);
  border-bottom: 1px solid var(--c-text);
}
.marquee__track {
  display: flex;
  gap: 40px;
  white-space: nowrap;
  animation: marquee 42s linear infinite;
  width: max-content;
}
.marquee__item {
  font-family: var(--f-display);
  font-weight: 500;
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: -0.01em;
  display: inline-flex;
  align-items: center;
  gap: 40px;
}
.marquee__item::after {
  content: "✦";
  font-weight: 400;
  font-style: italic;
  color: var(--c-bg-light);
  opacity: 0.7;
}
@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* Not quite anything else — 3-card differentiators */
.diffs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 16px;
}
.diff {
  background: var(--c-bg-med);
  border-radius: var(--r-lg);
  padding: 40px 32px 36px;
  position: relative;
  transition: transform 0.32s cubic-bezier(.2,.6,.2,1), box-shadow 0.32s ease;
  overflow: hidden;
}
.diff:hover {
  transform: translateY(-4px);
  box-shadow: 0 28px 50px -30px rgba(32, 14, 3, 0.3);
}
.diff__num {
  font-family: var(--f-display);
  font-weight: 300;
  font-style: italic;
  font-size: 48px;
  line-height: 1;
  color: var(--c-copper);
  opacity: 0.3;
  position: absolute;
  top: 24px;
  right: 28px;
  letter-spacing: 0.02em;
}
.diff__lead {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(20px, 2.2vw, 24px);
  line-height: 1.2;
  letter-spacing: -0.008em;
  margin: 0 0 16px;
  max-width: 80%;
  color: var(--c-text);
}
.diff__body {
  font-size: 15px;
  line-height: 1.55;
  color: var(--c-text-70);
  margin: 0;
}

.diff-tag {
  text-align: center;
  margin-top: 64px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* Is this for you */
.for-you {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
  align-items: start;
}
.for-you__list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.for-you__list li {
  padding: 22px 0;
  border-top: 1px solid var(--c-text-15);
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.5;
  display: flex;
  gap: 18px;
  font-family: var(--f-display);
  font-weight: 400;
  letter-spacing: -0.005em;
  transition: padding-left 0.3s cubic-bezier(.2,.6,.2,1);
}
.for-you__list li:hover { padding-left: 8px; }
.for-you__list li:last-child { border-bottom: 1px solid var(--c-text-15); }
.for-you__list li::before {
  content: "—";
  color: var(--c-copper);
  font-weight: 500;
  flex-shrink: 0;
}

/* Testimonials */
.testimonials {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.t-card {
  padding: 32px 28px 28px;
  background: var(--c-bg-med);
  border-radius: var(--r-lg);
  display: flex;
  flex-direction: column;
  gap: 22px;
  position: relative;
  transition: transform 0.28s cubic-bezier(.2,.6,.2,1), box-shadow 0.28s ease;
  overflow: hidden;
}
.t-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 24px 40px -28px rgba(32, 14, 3, 0.3);
}
.t-card::before {
  content: "";
  position: absolute;
  left: 28px;
  bottom: 60px;
  width: 30px;
  height: 2px;
  background: var(--c-copper);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.36s cubic-bezier(.2,.6,.2,1);
}
.t-card:hover::before { transform: scaleX(1); }
.t-card__quote {
  font-family: var(--f-display);
  font-weight: 400;
  font-size: clamp(17px, 1.8vw, 20px);
  line-height: 1.34;
  letter-spacing: -0.005em;
  color: var(--c-text);
  margin: 0;
  flex-grow: 1;
}
.t-card__quote-mark {
  font-family: var(--f-display);
  font-size: 36px;
  line-height: 0;
  color: var(--c-copper);
  margin-right: 4px;
  font-weight: 500;
  position: relative;
  top: 0.18em;
}
.t-card__name {
  font-family: var(--f-sans);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-text);
  padding-top: 16px;
  border-top: 1px solid var(--c-text-15);
}

/* Research */
.research {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}
.research h2 { margin-bottom: 28px; }
.research p { font-size: 18px; line-height: 1.55; color: var(--c-text-70); }
.research .featured {
  font-family: var(--f-display);
  font-weight: 500;
  font-size: clamp(22px, 2.6vw, 30px);
  color: var(--c-text);
  line-height: 1.28;
  letter-spacing: -0.008em;
  margin: 28px 0;
  padding: 24px 0;
  border-top: 1px solid var(--c-text-15);
  border-bottom: 1px solid var(--c-text-15);
}

/* Sessions */
.sessions {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 60px;
  align-items: center;
}
.sessions__copy h2 { margin-bottom: 24px; }
.sessions__copy p { color: var(--c-text-70); font-size: 16px; }
.sessions__copy .loc {
  font-family: var(--f-display);
  font-weight: 500;
  color: var(--c-text);
  font-size: clamp(20px, 2.2vw, 24px);
  line-height: 1.32;
  margin: 0 0 24px;
  letter-spacing: -0.005em;
}
.sessions__cta { margin-top: 12px; }
.sessions__photo {
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 5/4;
  background: var(--c-bg-dark);
}
.sessions__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* FAQ */
.faq { max-width: 800px; margin: 0 auto; }
.faq h2 { text-align: center; margin-bottom: 48px; }
.faq details {
  border-top: 1px solid var(--c-text-15);
  padding: 22px 0;
}
.faq details:last-of-type { border-bottom: 1px solid var(--c-text-15); }
.faq summary {
  list-style: none;
  cursor: pointer;
  font-family: var(--f-display);
  font-weight: 500;
  font-size: clamp(18px, 2vw, 21px);
  letter-spacing: -0.005em;
  color: var(--c-text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-family: var(--f-sans);
  font-weight: 400;
  font-size: 24px;
  color: var(--c-copper);
  transition: transform 0.22s cubic-bezier(.2,.6,.2,1);
  line-height: 1;
}
.faq details[open] summary::after { content: "−"; }
.faq details p {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-text-70);
  max-width: 680px;
}

/* Footer */
.footer {
  background: var(--c-text);
  color: var(--c-bg-light);
  padding: 80px 0 56px;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  align-items: end;
}
.footer .brand__mark { color: var(--c-bg-light); font-size: 26px; }
.footer .brand__sub { color: var(--c-bg-light); opacity: 0.7; font-size: 14px; }
.footer__tag {
  font-family: var(--f-display);
  font-style: italic;
  font-weight: 300;
  font-size: 20px;
  color: var(--c-bg-light);
  opacity: 0.75;
  margin: 16px 0 0;
}
.footer__col-title {
  font-family: var(--f-sans);
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-bg-light);
  opacity: 0.5;
  margin: 0 0 16px;
}
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: 8px; font-size: 14px; line-height: 1.5; }
.footer a {
  color: var(--c-bg-light);
  opacity: 0.85;
  transition: color 0.18s ease, opacity 0.18s ease;
}
.footer a:hover { opacity: 1; color: var(--c-accent); }
.footer__base {
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 248, 238, 0.15);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-bg-light);
  opacity: 0.5;
  display: flex;
  justify-content: space-between;
}

/* Reveal on scroll */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.7s cubic-bezier(.2,.6,.2,1), transform 0.7s cubic-bezier(.2,.6,.2,1);
  }
  .reveal.is-revealed {
    opacity: 1;
    transform: translateY(0);
  }
  .reveal[data-delay="100"]  { transition-delay: 0.1s; }
  .reveal[data-delay="200"]  { transition-delay: 0.2s; }
  .reveal[data-delay="300"]  { transition-delay: 0.3s; }
  .reveal[data-delay="400"]  { transition-delay: 0.4s; }
}

/* Counter */
.count {
  font-variant-numeric: tabular-nums;
}

/* Hero load-in */
@media (prefers-reduced-motion: no-preference) {
  .hero h1, .hero__lede, .hero__cta-row {
    opacity: 0;
    transform: translateY(14px);
    animation: rise 0.9s cubic-bezier(.2,.6,.2,1) forwards;
  }
  .hero h1       { animation-delay: 0.10s; }
  .hero__lede    { animation-delay: 0.28s; }
  .hero__cta-row { animation-delay: 0.44s; }
}
@keyframes rise { to { opacity: 1; transform: translateY(0); } }

/* Responsive */
@media (max-width: 980px) {
  .chapter,
  .chapter--reverse {
    grid-template-columns: 50px 1fr;
    gap: 24px;
  }
  .chapter__marker { grid-column: 1; grid-row: 1; }
  .chapter__copy,
  .chapter--reverse .chapter__copy { grid-column: 2; grid-row: 1; }
  .chapter__media,
  .chapter--reverse .chapter__media {
    grid-column: 2;
    grid-row: 2;
    margin-top: 16px;
  }
  .timeline::before { left: 25px; }
  .edge, .for-you, .sessions, .footer__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .diffs { grid-template-columns: 1fr; }
  .testimonials { grid-template-columns: 1fr 1fr; }
  .nav__links a:not(.btn) { display: none; }
}
@media (max-width: 600px) {
  body { font-size: 16px; }
  .section { padding: 72px 0; }
  .testimonials { grid-template-columns: 1fr; }
  .hero { min-height: 88vh; }
  .hero__inner { padding-top: 60px; }
  .sessions__photo { aspect-ratio: 4/3; }
  .photo-band { aspect-ratio: 4/3; }
  .footer__grid { gap: 32px; }
  .footer__base { flex-direction: column; gap: 8px; }
  .marquee__item { gap: 24px; }
  .marquee__track { gap: 24px; }
  .nav__inner { height: 64px; }
  .brand__mark { font-size: 17px; }
  .brand__sub { font-size: 11px; }
  .btn { padding: 11px 18px; font-size: 13px; }
  .chapter {
    grid-template-columns: 40px 1fr;
    gap: 16px;
  }
  .timeline::before { left: 19px; }
  /* Lab Report needs more vertical room than 4:3 gives on a phone — let it
     grow to its content so the sparkline + footer stats stay visible. */
  .chapter__media:has(.lab-report) { aspect-ratio: auto; }
  .lab-report {
    aspect-ratio: auto;
    padding: 22px 18px 20px;
    gap: 16px;
  }
  .lab-report__indexes { gap: 8px; }
  .idx-card { padding: 12px 10px 14px; }
  .idx-card__label { font-size: 8px; letter-spacing: 0.14em; }
  .idx-card__delta { font-size: 9px; white-space: nowrap; }
}