/* ============================================================
   THE 2026 BROKER STACK · SALES LAYER
   Layout for the short interactive /broker-stack page and the
   summary / fold chrome on the chapter pages. Loads after
   broker-stack.css and reuses its tokens. Locked palette only.
   ============================================================ */

/* ---- Buttons ---- */
.bs-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  border-radius: 6px;
  border: 1px solid transparent;
  font-family: var(--body);
  font-weight: 600;
  font-size: 14.5px;
  letter-spacing: -0.005em;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition: transform 0.18s var(--ease-expo), box-shadow 0.25s var(--ease-out), border-color 0.2s, color 0.2s, background 0.2s;
}
.bs-btn:hover { transform: translateY(-2px); }
.bs-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.bs-btn--primary { background: var(--accent); color: #001b08; }
.bs-btn--primary:hover { box-shadow: 0 10px 30px -12px rgba(6, 240, 90, 0.55); }
.bs-btn--ghost { color: var(--text); border-color: var(--line-2); background: rgba(255, 255, 255, 0.02); }
.bs-btn--ghost:hover { border-color: var(--accent); color: var(--accent); }
.bs-btn .arrow { transition: transform 0.25s var(--ease-out); }
.bs-btn:hover .arrow { transform: translateX(3px); }
.bs-btn-meta {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.8;
  padding-left: 10px;
  border-left: 1px solid currentColor;
  line-height: 1;
}

/* ---- Hero ---- */
.bs-hero { padding-top: clamp(112px, 13vw, 148px); padding-bottom: clamp(40px, 6vw, 72px); }
.bs-hero .manifesto-headline {
  font-size: clamp(40px, 6vw, 86px);
  margin-bottom: clamp(22px, 2.6vw, 32px);
}
.bs-hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
}
.bs-hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1.4s var(--ease-out);
}
.bs-hero-video.is-playing { opacity: 0.55; }
.bs-hero-media-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(5, 5, 5, 0.94) 0%, rgba(5, 5, 5, 0.8) 42%, rgba(5, 5, 5, 0.38) 100%),
    linear-gradient(180deg, rgba(5, 5, 5, 0.35) 0%, rgba(5, 5, 5, 0) 35%, #050505 100%);
}
.bs-hero .manifesto-headline { max-width: 16ch; }
.bs-hero .manifesto-sub { max-width: 58ch; }
.bs-hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3vw, 36px);
}
.bs-stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: clamp(44px, 6vw, 80px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--line);
}
.bs-stats li {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 24px;
  background: rgba(10, 10, 10, 0.86);
}
.bs-stat-row { display: flex; align-items: baseline; gap: 10px; }
.bs-stat-n {
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(36px, 3.6vw, 54px);
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.bs-stat-u {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-mute);
}
.bs-stat-l {
  font-family: var(--body);
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--text-dim);
}

/* ---- Three shifts ---- */
.bs-shift { padding: clamp(56px, 7vw, 96px) 0; }
.bs-shift-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr 1fr;
  gap: 14px;
}
.bs-shift-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.4vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.015);
}
.bs-shift-card:first-child {
  border-color: rgba(6, 240, 90, 0.28);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(6, 240, 90, 0.07) 0%, rgba(6, 240, 90, 0) 55%),
    var(--bg-1);
}
.bs-shift-num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--text-mute);
}
.bs-shift-card h2 {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(20px, 1.9vw, 26px);
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--text);
}
.bs-shift-card p {
  font-family: var(--body);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--text-dim);
}
.bs-shift-foot {
  margin-top: 18px;
  font-family: var(--body);
  font-size: 14px;
  color: var(--text-mute);
}
.bs-shift-foot a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid var(--line-2);
  transition: color 0.2s var(--ease-out), border-color 0.2s var(--ease-out);
}
.bs-shift-foot a:hover { color: var(--accent); border-color: var(--accent); }

/* ---- Chapter panels ---- */
.bs-chapter {
  padding: 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 96px;
}
.bs-ch-head {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(28px, 4vw, 64px);
  align-items: center;
  padding: clamp(64px, 8vw, 112px) 0 clamp(12px, 2vw, 24px);
}
.bs-ch-title {
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(38px, 5.4vw, 72px);
  letter-spacing: -0.04em;
  line-height: 0.98;
  color: var(--text);
  margin-bottom: clamp(16px, 2vw, 24px);
}
.bs-ch-sub {
  font-family: var(--body);
  font-size: clamp(16px, 1.3vw, 19px);
  line-height: 1.6;
  color: var(--text-dim);
  max-width: 54ch;
}
.bs-ch-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: clamp(18px, 2vw, 26px);
}
.bs-ch-points li {
  position: relative;
  padding-left: 24px;
  font-family: var(--body);
  font-size: 15px;
  line-height: 1.5;
  color: var(--text);
}
.bs-ch-points li::before {
  content: "+";
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.5;
  color: var(--accent);
}
.bs-ch-more {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: clamp(20px, 2.4vw, 30px);
  padding-bottom: 4px;
  border-bottom: 1px solid var(--line-2);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s var(--ease-out), border-color 0.2s var(--ease-out);
}
.bs-ch-more:hover { color: var(--accent); border-color: var(--accent); }
.bs-ch-more-meta { color: var(--text-mute); }

.bs-ch-fig {
  position: relative;
  margin: 0;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--bg-1);
}
.bs-ch-fig img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  mix-blend-mode: screen;
  opacity: 0.94;
  transform: scale(1.04);
  transition: transform 1.6s var(--ease-expo);
}
.bs-ch-fig:hover img { transform: scale(1); }
.bs-ch-fig::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(5, 5, 5, 0) 55%, rgba(5, 5, 5, 0.65) 100%);
}
.bs-ch-figcap {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 1;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-mute);
}
.bs-ch-fig.is-missing { display: none; }
.bs-ch-head:has(.bs-ch-fig.is-missing) { grid-template-columns: 1fr; }
.bs-ch-head:has(.bs-ch-fig.is-missing) .bs-ch-sub { max-width: 62ch; }

/* tools sit tighter inside a chapter than they did in the report */
.bs-sales .bbm-section { padding: clamp(28px, 4vw, 56px) 0; }
.bs-sales .bbm-section + .bbm-section { padding-top: 0; }
.bs-sales .s1-section.bs-tool { padding: clamp(24px, 3.5vw, 48px) 0 clamp(8px, 1vw, 16px); }

/* ---- Bridge cards (chapter -> product) ---- */
.bs-bridge {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: clamp(18px, 3vw, 40px);
  align-items: center;
  margin: clamp(8px, 1vw, 16px) 0 clamp(64px, 8vw, 104px);
  padding: clamp(22px, 2.8vw, 34px);
  border: 1px solid rgba(6, 240, 90, 0.26);
  border-radius: var(--r-lg);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(6, 240, 90, 0.07) 0%, rgba(6, 240, 90, 0) 55%),
    var(--bg-1);
}
.bs-bridge-tag {
  display: block;
  margin-bottom: 10px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}
.bs-bridge h3 {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(22px, 2.2vw, 30px);
  letter-spacing: -0.03em;
  line-height: 1.08;
  color: var(--text);
  margin-bottom: 8px;
}
.bs-bridge p {
  font-family: var(--body);
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-dim);
  max-width: 58ch;
}
.bs-bridge-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}
.bs-bridge-alt {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-mute);
  text-decoration: none;
  border-bottom: 1px solid var(--line-2);
  padding-bottom: 2px;
  transition: color 0.2s var(--ease-out), border-color 0.2s var(--ease-out);
}
.bs-bridge-alt:hover { color: var(--text-dim); border-color: var(--accent); }

/* ---- Path Finder ---- */
.bs-finder { padding: clamp(72px, 9vw, 120px) 0 clamp(24px, 3vw, 40px); scroll-margin-top: 96px; }
.bs-finder tfm-path-finder { display: block; }

/* ---- Three doors ---- */
.bs-doors { padding: clamp(56px, 7vw, 96px) 0; }
.bs-doors-title,
.bs-faq-title {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(28px, 3.2vw, 44px);
  letter-spacing: -0.035em;
  line-height: 1.02;
  color: var(--text);
  margin: 14px 0 clamp(24px, 3vw, 40px);
}
.bs-door {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: rgba(255, 255, 255, 0.015);
  overflow: hidden;
  transition: border-color 0.2s var(--ease-out), transform 0.2s var(--ease-out);
}
.bs-door:hover { border-color: var(--line-2); transform: translateY(-2px); }
.bs-door--accel {
  grid-template-columns: 0.9fr 1.1fr;
  border-color: rgba(6, 240, 90, 0.3);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(6, 240, 90, 0.08) 0%, rgba(6, 240, 90, 0) 55%),
    var(--bg-1);
}
.bs-door-plate {
  position: relative;
  margin: 0;
  aspect-ratio: 4 / 3;
  background: var(--bg-1);
  overflow: hidden;
}
.bs-door--accel .bs-door-plate { aspect-ratio: auto; min-height: 260px; }
.bs-door-plate img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  mix-blend-mode: screen;
  opacity: 0.95;
}
.bs-door-plate::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(5, 5, 5, 0) 50%, rgba(10, 10, 10, 0.75) 100%);
}
.bs-door--accel .bs-door-plate::after {
  background: linear-gradient(90deg, rgba(10, 10, 10, 0) 60%, rgba(10, 10, 10, 0.9) 100%);
}
.bs-door-plate.is-missing { display: none; }
.bs-door--accel .bs-door-plate.is-missing + .bs-door-body { grid-column: 1 / -1; }
.bs-door-body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  padding: clamp(22px, 2.8vw, 36px);
}
.bs-door-flag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-mute);
}
.bs-door--accel .bs-door-flag { color: var(--accent); }
.bs-door-pricerow { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 14px; }
.bs-door-price {
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(34px, 3.4vw, 52px);
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--text);
}
.bs-door-meta {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-mute);
}
.bs-door-title {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(20px, 1.9vw, 26px);
  letter-spacing: -0.025em;
  line-height: 1.1;
  color: var(--text);
}
.bs-door-text {
  font-family: var(--body);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--text-dim);
}
.bs-door-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 18px;
  margin: 4px 0 8px;
}
.bs-door-list li {
  position: relative;
  padding-left: 18px;
  font-family: var(--body);
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-dim);
}
.bs-door-list li::before {
  content: "+";
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--accent);
}
.bs-door-body .bs-btn { margin-top: auto; }
.bs-doors-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: clamp(18px, 2.4vw, 28px) 0;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-mute);
}
.bs-doors-divider::before,
.bs-doors-divider::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.bs-doors-secondary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

/* ---- FAQ ---- */
.bs-faq { padding: clamp(40px, 5vw, 72px) 0; }
.bs-faq-list { display: flex; flex-direction: column; gap: 10px; }
.bs-faq-item {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.015);
  transition: border-color 0.2s var(--ease-out);
}
.bs-faq-item[open] { border-color: rgba(6, 240, 90, 0.3); }
.bs-faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(16px, 1.3vw, 19px);
  letter-spacing: -0.015em;
  color: var(--text);
}
.bs-faq-item summary::-webkit-details-marker { display: none; }
.bs-faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: 16px;
  color: var(--text-mute);
  transition: transform 0.3s var(--ease-out), color 0.2s;
}
.bs-faq-item[open] summary::after { transform: rotate(45deg); color: var(--accent); }
.bs-faq-item summary:focus-visible { outline: none; box-shadow: inset 0 0 0 2px var(--accent); border-radius: var(--r-md); }
.bs-faq-item p {
  padding: 0 20px 20px;
  font-family: var(--body);
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-dim);
  max-width: 70ch;
}

/* ---- Close ---- */
.bs-close { padding: clamp(40px, 5vw, 72px) 0 clamp(80px, 10vw, 128px); }
.bs-close-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 14px;
  margin-top: 24px;
}
.bs-close-tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-mute);
  margin-right: 6px;
}
.bs-close-row a {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 14px;
  transition: color 0.2s var(--ease-out), border-color 0.2s var(--ease-out);
}
.bs-close-row a:hover { color: var(--accent); border-color: var(--accent); }

/* ============================================================
   CHAPTER PAGES · summary plate + folded long-form
   ============================================================ */
.bs-section-page .s1-hero { padding-top: clamp(40px, 5vw, 64px); }
.bs-ch-summary {
  position: relative;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: clamp(20px, 3vw, 40px);
  margin-top: clamp(20px, 2.4vw, 32px);
  padding: clamp(22px, 2.8vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: rgba(255, 255, 255, 0.012);
}
.bs-ch-summary-tag {
  display: block;
  margin-bottom: 12px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-mute);
}
.bs-ch-summary .bs-ch-points { margin-top: 0; }
.bs-ch-tools { display: flex; flex-direction: column; gap: 8px; }
.bs-ch-tools a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  font-family: var(--body);
  font-weight: 500;
  font-size: 14px;
  color: var(--text);
  text-decoration: none;
  transition: border-color 0.2s var(--ease-out), background 0.2s;
}
.bs-ch-tools a:hover { border-color: var(--accent); background: rgba(6, 240, 90, 0.03); }
.bs-ch-tools a span:last-child {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  white-space: nowrap;
}
.bs-tool { scroll-margin-top: 96px; }
.bs-fulltext { padding: clamp(16px, 2vw, 32px) 0 clamp(56px, 7vw, 96px); }
.bs-fulltext .fold-toggle { margin-top: 0; padding: 20px 24px; }
.bs-fulltext-note {
  margin: 12px 0 0;
  font-family: var(--body);
  font-size: 13px;
  color: var(--text-mute);
}
.bs-fulltext .fold-inner > section:first-child { padding-top: clamp(24px, 3vw, 40px); }
.bs-section-page .bs-bridge { margin-bottom: clamp(24px, 3vw, 40px); }
.bs-section-page .bs-finder { padding-top: clamp(24px, 3vw, 40px); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1023px) {
  .bs-ch-head { grid-template-columns: 1fr; }
  .bs-ch-fig { aspect-ratio: 16 / 9; }
}
@media (max-width: 900px) {
  .bs-shift-grid { grid-template-columns: 1fr; }
  .bs-door--accel { grid-template-columns: 1fr; }
  .bs-door--accel .bs-door-plate { aspect-ratio: 16 / 9; min-height: 0; }
  .bs-door--accel .bs-door-plate::after { background: linear-gradient(180deg, rgba(10, 10, 10, 0) 50%, rgba(10, 10, 10, 0.85) 100%); }
  .bs-ch-summary { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .bs-bridge { grid-template-columns: 1fr; }
  .bs-bridge-actions { width: 100%; }
  .bs-bridge-actions .bs-btn { width: 100%; justify-content: center; }
  .bs-doors-secondary { grid-template-columns: 1fr; }
  .bs-door-list { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .bs-stats { grid-template-columns: 1fr; }
  .bs-hero-ctas .bs-btn { width: 100%; justify-content: center; }
  .bs-hero-video { opacity: 0 !important; }
}
@media (max-width: 480px) {
  .bs-btn { white-space: normal; text-align: left; }
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .bs-hero-video { display: none; }
  .bs-btn,
  .bs-btn .arrow,
  .bs-door,
  .bs-ch-fig img,
  .bs-faq-item summary::after { transition: none !important; }
  .bs-btn:hover,
  .bs-door:hover { transform: none; }
  .bs-ch-fig img { transform: none; }
}

/* ============================================================
   LANDING LAYER · four-item nav, chapter cards, proof, sticky bar
   ============================================================ */

/* ---- Nav links ---- */
.nav-links { display: flex; align-items: center; gap: 26px; margin-right: 6px; }
.nav-links a {
  font-family: var(--body);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  color: rgba(244, 244, 245, 0.72);
  text-decoration: none;
  transition: color 0.18s;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text, #f4f4f5); }
@media (max-width: 760px) { .nav-links { display: none; } }

/* ---- Hero: one button, one quiet link ---- */
.bs-hero-alt {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-dim, rgba(244, 244, 245, 0.62));
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(244, 244, 245, 0.25);
  transition: color 0.2s, text-decoration-color 0.2s;
}
.bs-hero-alt:hover { color: var(--accent); text-decoration-color: var(--accent); }

/* ---- Chapter cards ---- */
.bs-grid-sec { padding: clamp(56px, 7vw, 96px) 0 clamp(24px, 3vw, 40px); scroll-margin-top: 96px; }
.bs-grid-title {
  font-family: var(--display);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.02;
  font-size: clamp(30px, 4.2vw, 54px);
  max-width: 820px;
  margin: 0 0 14px;
  text-wrap: balance;
}
.bs-grid-sub {
  color: var(--text-dim, rgba(244, 244, 245, 0.62));
  font-size: clamp(15px, 1.25vw, 17.5px);
  line-height: 1.65;
  max-width: 620px;
  margin: 0 0 clamp(28px, 4vw, 44px);
}
.bs-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.bs-card {
  position: relative;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.015));
  color: inherit;
  text-decoration: none;
  transition: border-color 0.25s, transform 0.35s var(--ease-expo), box-shadow 0.35s;
}
.bs-card:hover { border-color: rgba(6, 240, 90, 0.32); transform: translateY(-3px); box-shadow: 0 22px 50px -32px rgba(6, 240, 90, 0.35); }
.bs-card:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.bs-card-fig { margin: 0; aspect-ratio: 16 / 9; overflow: hidden; background: #0a0a0a; border-bottom: 1px solid var(--line); }
.bs-card-fig img { width: 100%; height: 100%; object-fit: cover; display: block; opacity: 0.9; transform: scale(1.02); transition: transform 0.6s var(--ease-expo), opacity 0.3s; }
.bs-card:hover .bs-card-fig img { transform: scale(1.06); opacity: 1; }
.bs-card-fig.is-missing { display: none; }
.bs-card-body { display: flex; flex-direction: column; gap: 10px; padding: 20px 22px 22px; flex: 1; }
.bs-card-num { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); }
.bs-card-title { font-family: var(--display); font-weight: 700; font-size: clamp(19px, 1.6vw, 23px); letter-spacing: -0.015em; line-height: 1.15; margin: 0; }
.bs-card-line { color: var(--text-dim, rgba(244, 244, 245, 0.62)); font-size: 14.5px; line-height: 1.6; margin: 0; flex: 1; }
.bs-card-meta {
  display: flex; align-items: center; gap: 14px;
  padding-top: 14px; border-top: 1px solid var(--line);
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-mute, rgba(244, 244, 245, 0.42));
}
.bs-card-go { margin-left: auto; color: var(--text, #f4f4f5); transition: color 0.2s; }
.bs-card:hover .bs-card-go { color: var(--accent); }
.bs-grid-foot { margin: 22px 0 0; color: var(--text-dim, rgba(244, 244, 245, 0.62)); font-size: 14.5px; }
.bs-grid-foot a { color: var(--text, #f4f4f5); text-decoration: underline; text-underline-offset: 3px; }
.bs-grid-foot a:hover { color: var(--accent); }
@media (max-width: 940px) { .bs-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .bs-grid { grid-template-columns: 1fr; } }

/* ---- Proof ---- */
.bs-proof { padding: clamp(56px, 7vw, 96px) 0; }
tfm-proof-wall { display: block; }

/* ---- Sticky chapter bar ---- */
.bs-sticky {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 90;
  display: flex; align-items: center; gap: 14px;
  padding: 10px clamp(14px, 3vw, 28px);
  background: rgba(5, 5, 5, 0.84);
  backdrop-filter: blur(12px) saturate(130%);
  -webkit-backdrop-filter: blur(12px) saturate(130%);
  border-top: 1px solid var(--line);
  transform: translateY(110%);
  transition: transform 0.45s var(--ease-expo);
}
.bs-sticky.is-on { transform: none; }
.bs-sticky-nav {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-width: 42px; min-height: 42px; padding: 0 10px;
  border: 1px solid var(--line); border-radius: 6px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-dim, rgba(244, 244, 245, 0.62)); text-decoration: none; white-space: nowrap;
  transition: color 0.2s, border-color 0.2s;
}
.bs-sticky-nav:hover { border-color: var(--accent); }
.bs-sticky-nav:hover { color: var(--accent); }
.bs-sticky-now {
  flex: 1; text-align: center;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-mute, rgba(244, 244, 245, 0.42));
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.bs-sticky-cta { padding: 11px 16px; font-size: 13.5px; }
.bs-section-page main { padding-bottom: 84px; }
@media (max-width: 640px) {
  .bs-sticky-now { display: none; }
  .bs-sticky-nav span { display: none; }
  .bs-sticky { gap: 10px; }
  .bs-sticky-cta { flex: 1; justify-content: center; font-size: 13px; padding: 11px 12px; }
}
@media (max-width: 480px) {
  .bs-sticky-cta .bs-btn-meta { display: none; }
}

/* ---- Phone menu ---- */
.nav-burger { display: none; }
@media (max-width: 760px) {
  .nav-burger {
    display: inline-flex; flex-direction: column; justify-content: center; gap: 5px;
    width: 44px; height: 44px; padding: 0 12px; margin-left: 4px;
    border: 1px solid var(--line-2); border-radius: var(--r-sm, 4px);
    background: rgba(255, 255, 255, 0.02); color: var(--text); cursor: pointer;
  }
  .nav-burger span { display: block; height: 1.5px; background: currentColor; transition: transform 0.25s var(--ease-out), opacity 0.2s; }
  .nav.is-open .nav-burger span:first-child { transform: translateY(3.25px) rotate(45deg); }
  .nav.is-open .nav-burger span:last-child { transform: translateY(-3.25px) rotate(-45deg); }
  .nav.is-open { background: #050505; backdrop-filter: blur(14px) saturate(130%); -webkit-backdrop-filter: blur(14px) saturate(130%); border-bottom-color: var(--line); }
  .nav.is-open .nav-links {
    display: flex; flex-direction: column; align-items: stretch; gap: 0; margin: 0;
    position: absolute; left: 0; right: 0; top: 100%;
    padding: 4px 20px 18px;
    background: #050505; backdrop-filter: blur(14px) saturate(130%); -webkit-backdrop-filter: blur(14px) saturate(130%);
    border-bottom: 1px solid var(--line);
  }
  .nav.is-open .nav-links a { padding: 16px 0; border-bottom: 1px solid var(--line); font-size: 17px; color: var(--text); }
  .nav.is-open .nav-links a:last-child { border-bottom: 0; }
}