/* ============================================================
   Components — reusable UI primitives
   ============================================================ */

/* ------------------------------------------------------------
   Eyebrow / index marker
   ------------------------------------------------------------ */
.eyebrow {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  font-family: var(--font-mono);
  font-size: var(--t-micro);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 0 0 var(--s-5);
}
.eyebrow__num { color: var(--flare); font-variant-numeric: tabular-nums; }
.eyebrow__line { flex: 1; height: 1px; background: var(--rule); min-width: 24px; }

.band-ink .eyebrow { color: var(--on-dark-faint); }
.band-ink .eyebrow__line { background: var(--ink-rule); }
.band-blue .eyebrow { color: var(--on-blue-faint); }
.band-blue .eyebrow__line { background: var(--blue-rule); }
.band-blue .eyebrow__num { color: #fff; }

.sec-head { margin-bottom: clamp(2rem, 1.4rem + 2vw, 3.5rem); }
.sec-head__title { max-width: 20ch; }
.sec-head__intro {
  margin-top: var(--s-5);
  max-width: 58ch;
  color: var(--text-muted);
  font-size: var(--t-lead);
  line-height: 1.5;
}
.band-ink .sec-head__intro { color: var(--on-dark-muted); }
.band-blue .sec-head__intro { color: var(--on-blue-muted); }

.lead { font-size: var(--t-lead); line-height: 1.5; color: var(--text-muted); }

.text-mono {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: 0.02em;
}

/* Oversized display type used for statement moments */
.mega {
  font-family: var(--font-display);
  font-size: var(--t-mega);
  font-weight: 800;
  line-height: 0.86;
  letter-spacing: -0.045em;
  text-transform: uppercase;
}

/* ------------------------------------------------------------
   Buttons — squared, heavy, graphic
   ------------------------------------------------------------ */
.btn {
  --btn-bg: var(--ink);
  --btn-fg: var(--bone);
  --btn-bd: var(--ink);
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-3);
  padding: 0.9375rem 1.5rem;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 2px solid var(--btn-bd);
  border-radius: var(--r-md);
  font-family: var(--font-body);
  font-size: var(--t-sm);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.15;
  text-align: center;
  cursor: pointer;
  transition:
    background var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    transform var(--dur-fast) var(--ease),
    box-shadow var(--dur) var(--ease);
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); box-shadow: none; }
.btn[disabled], .btn[aria-disabled="true"] { opacity: 0.5; pointer-events: none; transform: none; }

.btn--primary { --btn-bg: var(--blue); --btn-bd: var(--blue); --btn-fg: #fff; }
.btn--primary:hover { --btn-bg: var(--blue-deep); --btn-bd: var(--blue-deep); }

.btn--dark { --btn-bg: var(--ink); --btn-bd: var(--ink); --btn-fg: var(--bone); }
.btn--dark:hover { --btn-bg: var(--ink-3); --btn-bd: var(--ink-3); }

.btn--ghost { --btn-bg: transparent; --btn-fg: var(--ink); --btn-bd: var(--ink); }
.btn--ghost:hover { --btn-bg: var(--ink); --btn-fg: var(--bone); }

.btn--on-dark { --btn-bg: transparent; --btn-fg: var(--on-dark); --btn-bd: var(--ink-rule-2); }
.btn--on-dark:hover { --btn-bg: var(--bone); --btn-fg: var(--ink); --btn-bd: var(--bone); }

.btn--on-blue { --btn-bg: transparent; --btn-fg: #fff; --btn-bd: var(--blue-rule); }
.btn--on-blue:hover { --btn-bg: #fff; --btn-fg: var(--blue); --btn-bd: #fff; }

.btn--light { --btn-bg: var(--bone); --btn-bd: var(--bone); --btn-fg: var(--ink); }
.btn--light:hover { --btn-bg: #fff; --btn-bd: #fff; }

.btn--sm { padding: 0.5625rem 0.9375rem; font-size: var(--t-xs); border-width: 1.5px; }
.btn--lg { padding: 1.0625rem 1.875rem; font-size: var(--t-body); }
.btn--block { width: 100%; }

.btn__arrow { transition: transform var(--dur) var(--ease); flex-shrink: 0; }
.btn:hover .btn__arrow { transform: translateX(4px); }

/* Text link */
.link {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-weight: 600;
  color: var(--blue);
  background-image: linear-gradient(currentColor, currentColor);
  background-size: 100% 2px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  transition: background-size var(--dur) var(--ease), color var(--dur) var(--ease);
}
.link:hover { background-size: 0% 2px; }
.link--quiet { color: var(--text); background-size: 0% 2px; }
.link--quiet:hover { background-size: 100% 2px; }
.band-ink .link, .band-blue .link { color: #fff; }
.link__arrow { transition: transform var(--dur) var(--ease); }
.link:hover .link__arrow { transform: translateX(3px); }

/* ------------------------------------------------------------
   Tag / Badge
   ------------------------------------------------------------ */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.3125rem 0.5625rem;
  border: 1px solid var(--rule);
  border-radius: var(--r-sm);
  background: transparent;
  font-family: var(--font-mono);
  font-size: var(--t-micro);
  letter-spacing: 0.04em;
  color: var(--text-muted);
  white-space: nowrap;
}
.band-ink .tag { border-color: var(--ink-rule); color: var(--on-dark-muted); }
.band-blue .tag { border-color: var(--blue-rule); color: var(--on-blue-muted); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  padding: 0.3125rem 0.6875rem;
  border-radius: var(--r-sm);
  font-family: var(--font-mono);
  font-size: var(--t-micro);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 500;
  border: 1px solid transparent;
}
.badge--accent  { background: var(--blue-wash); color: var(--blue-deep); border-color: rgba(36,56,255,0.2); }
.badge--flare   { background: var(--flare-wash); color: #C63C13; border-color: rgba(255,90,43,0.28); }
.badge--neutral { background: var(--bone-2); color: var(--text-muted); border-color: var(--rule); }
.badge--on-dark { background: rgba(255,255,255,0.06); color: var(--on-dark-muted); border-color: var(--ink-rule); }
.badge--on-blue { background: rgba(255,255,255,0.12); color: #fff; border-color: var(--blue-rule); }
.badge__dot { width: 5px; height: 5px; border-radius: 50%; background: currentColor; }

/* TODO marker */
.todo {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4em;
  padding: 0.15rem 0.45rem;
  border: 1px dashed var(--flare);
  border-radius: var(--r-sm);
  background: var(--flare-wash);
  color: #C63C13;
  font-family: var(--font-mono);
  font-size: var(--t-micro);
  line-height: 1.5;
}
.todo::before { content: "TODO"; font-weight: 600; letter-spacing: 0.06em; opacity: 0.7; }
.band-ink .todo, .band-blue .todo {
  background: rgba(255,90,43,0.12);
  color: #FF8A62;
  border-color: rgba(255,90,43,0.45);
}

/* ------------------------------------------------------------
   Card
   ------------------------------------------------------------ */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--bone);
  border: 1px solid var(--rule);
  border-radius: var(--r-lg);
  padding: clamp(1.25rem, 1rem + 1vw, 2rem);
  transition:
    border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease),
    transform var(--dur) var(--ease),
    background var(--dur) var(--ease);
}
.card--link:hover, .card--link:focus-within {
  border-color: var(--ink);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.card--on-dark { background: var(--ink-2); border-color: var(--ink-rule); color: var(--on-dark); }
.card--on-dark:hover { border-color: var(--ink-rule-2); background: var(--ink-3); }
.card--on-blue { background: rgba(255,255,255,0.07); border-color: var(--blue-rule); color: #fff; }
.card--on-blue:hover { background: rgba(255,255,255,0.12); border-color: rgba(255,255,255,0.4); }

.card__index {
  font-family: var(--font-mono);
  font-size: var(--t-micro);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--flare);
  margin-bottom: var(--s-4);
}
.card__title { margin-bottom: var(--s-3); }
.card__body { color: var(--text-muted); font-size: var(--t-sm); }
.card--on-dark .card__body { color: var(--on-dark-muted); }
.card--on-blue .card__body { color: var(--on-blue-muted); }
.card__foot { margin-top: auto; padding-top: var(--s-5); }
.card__stretch::after { content: ""; position: absolute; inset: 0; border-radius: inherit; }

/* Outcome card */
.outcome { border-top: 3px solid var(--blue); border-radius: 0 0 var(--r-lg) var(--r-lg); }
.outcome__icon { margin-bottom: var(--s-5); color: var(--blue); }
.card--on-dark.outcome, .card--on-blue.outcome { border-top-color: currentColor; }

/* ------------------------------------------------------------
   Spec rows
   ------------------------------------------------------------ */
.spec { display: grid; border-top: 1px solid var(--rule); }
.spec__row {
  display: grid;
  grid-template-columns: minmax(110px, 22%) 1fr;
  gap: var(--s-4);
  padding: var(--s-4) 0;
  border-bottom: 1px solid var(--rule);
  align-items: start;
}
.spec__key {
  font-family: var(--font-mono);
  font-size: var(--t-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  padding-top: 0.25em;
}
.spec__val { font-size: var(--t-sm); }
.spec--product .spec__row {
  grid-template-columns: 88px minmax(0, 1fr);
  gap: var(--s-3);
}
.band-ink .spec, .band-ink .spec__row, .card--on-dark .spec, .card--on-dark .spec__row { border-color: var(--ink-rule); }
.band-ink .spec__key, .card--on-dark .spec__key { color: var(--on-dark-faint); }
.band-ink .spec__val, .card--on-dark .spec__val { color: var(--on-dark-muted); }
.band-blue .spec, .band-blue .spec__row, .card--on-blue .spec, .card--on-blue .spec__row { border-color: var(--blue-rule); }
.band-blue .spec__key, .card--on-blue .spec__key { color: var(--on-blue-faint); }
.band-blue .spec__val, .card--on-blue .spec__val { color: var(--on-blue-muted); }
@media (max-width: 560px) {
  .spec__row,
  .spec--product .spec__row { grid-template-columns: 1fr; gap: var(--s-2); }
}

/* Checklist */
.checks { display: grid; gap: var(--s-3); }
.checks--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr)); }
.check {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: var(--s-3);
  align-items: start;
  font-size: var(--t-sm);
  color: var(--text-muted);
}
.check__mark { color: var(--blue); margin-top: 0.3em; }
.band-ink .check { color: var(--on-dark-muted); }
.band-ink .check__mark { color: var(--blue-bright); }
.band-blue .check { color: var(--on-blue-muted); }
.band-blue .check__mark { color: #fff; }

/* ------------------------------------------------------------
   Quote
   ------------------------------------------------------------ */
.quote {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 1.1rem + 3vw, 3.75rem);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.038em;
  text-wrap: balance;
  margin: 0;
}
.quote em { color: var(--blue); font-style: normal; }
.band-ink .quote em, .band-blue .quote em { color: #fff; }
.quote__cite {
  display: block;
  margin-top: var(--s-6);
  font-family: var(--font-mono);
  font-size: var(--t-micro);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-style: normal;
  color: var(--text-faint);
}
.band-ink .quote__cite { color: var(--on-dark-faint); }
.band-blue .quote__cite { color: var(--on-blue-faint); }

/* ------------------------------------------------------------
   Asset frame
   ------------------------------------------------------------ */
.frame {
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: var(--r-md);
  background: var(--bone-2);
  border: 1px solid var(--rule);
  aspect-ratio: var(--frame-ratio, 16 / 10);
}
.frame::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, var(--rule) 1px, transparent 1px),
    linear-gradient(to bottom, var(--rule) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.5;
}
.frame__label {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.75rem;
  background: var(--bone);
  border: 1px solid var(--rule-strong);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: var(--t-micro);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  text-align: center;
}
.frame--on-dark { background: var(--ink-2); border-color: var(--ink-rule); }
.frame--on-dark::before {
  background-image:
    linear-gradient(to right, var(--ink-rule) 1px, transparent 1px),
    linear-gradient(to bottom, var(--ink-rule) 1px, transparent 1px);
}
.frame--on-dark .frame__label { background: var(--ink-3); border-color: var(--ink-rule-2); color: var(--on-dark-faint); }

/* ------------------------------------------------------------
   Forms
   ------------------------------------------------------------ */
.field { display: flex; flex-direction: column; gap: var(--s-2); }
.field__label { font-size: var(--t-xs); font-weight: 600; }
.field__req { color: var(--flare); margin-left: 0.2em; }
.field__hint { font-size: var(--t-xs); color: var(--text-faint); }
.field__error { font-size: var(--t-xs); color: #C0271F; display: none; font-weight: 500; }
.field.has-error .field__error { display: block; }
.field.has-error .input { border-color: #C0271F; }

.input {
  width: 100%;
  padding: 0.75rem 0.875rem;
  background: transparent;
  border: 1.5px solid var(--rule-strong);
  border-radius: var(--r-md);
  font-size: var(--t-sm);
  color: var(--text);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background var(--dur) var(--ease);
}
.input::placeholder { color: var(--text-faint); }
.input:hover { border-color: var(--text-faint); }
.input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(36, 56, 255, 0.16);
  background: #fff;
}
textarea.input { min-height: 120px; resize: vertical; line-height: 1.6; }
select.input {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1.5 6 6.5l5-5' stroke='%2356544E' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.875rem center;
  padding-right: 2.25rem;
}

/* Consent checkbox. Never pre-checked — see Checkbox() in forms.js. */
.field--check { flex-direction: row; }
.check {
  display: flex;
  align-items: flex-start;
  gap: var(--s-3);
  font-size: var(--t-sm);
  color: var(--text-muted);
  cursor: pointer;
}
.check input[type="checkbox"] {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 0.1875rem;
  accent-color: var(--blue);
  cursor: pointer;
}
.field--check.has-error .check { color: #C0271F; }

/**
 * Honeypot. Positioned offscreen rather than `display: none`, because some
 * bots skip display-none inputs specifically. Every one of these needs
 * !important — the rule has to survive whatever the surrounding layout does.
 */
.honeypot {
  position: absolute !important;
  left: -10000px !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s-4) var(--s-5);
}
.form-grid > .field--full { grid-column: 1 / -1; }
.form-grid--single { grid-template-columns: 1fr; }
@media (max-width: 640px) { .form-grid { grid-template-columns: 1fr; } }

.magnet__form { display: grid; gap: var(--s-5); justify-items: start; }
.magnet__form .form-grid { width: 100%; }

.form-note {
  display: flex;
  gap: var(--s-3);
  padding: var(--s-4);
  border: 1px dashed var(--rule-strong);
  border-radius: var(--r-md);
  background: var(--bone-2);
  font-size: var(--t-xs);
  color: var(--text-muted);
}
.band-ink .form-note, .band-blue .form-note {
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.25);
  color: inherit;
}

.form-success {
  display: grid;
  gap: var(--s-4);
  place-items: start;
  padding: clamp(1.5rem, 1rem + 2vw, 2.5rem);
  border: 2px solid var(--blue);
  background: var(--blue-wash);
  color: var(--ink);
  border-radius: var(--r-lg);
  animation: pop var(--dur-slow) var(--ease-out) both;
}
@keyframes pop {
  from { opacity: 0; transform: scale(0.985) translateY(8px); }
  to   { opacity: 1; transform: none; }
}
.form-success__icon {
  display: grid; place-items: center;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
}

.btn.is-loading { pointer-events: none; }
.btn.is-loading .btn__label { opacity: 0.65; }
.spinner {
  width: 14px; height: 14px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 620ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ------------------------------------------------------------
   Filter chips
   ------------------------------------------------------------ */
.chips { display: flex; flex-wrap: wrap; gap: var(--s-2); }
.chip {
  padding: 0.5rem 0.9375rem;
  border: 1.5px solid var(--rule);
  background: transparent;
  border-radius: var(--r-pill);
  font-size: var(--t-xs);
  font-weight: 600;
  color: var(--text-muted);
  transition: all var(--dur) var(--ease);
}
.chip:hover { border-color: var(--ink); color: var(--text); }
.chip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--bone); }
.chip__count { font-family: var(--font-mono); font-size: 0.6875rem; opacity: 0.6; margin-left: 0.4em; }

.empty {
  display: grid;
  place-items: center;
  gap: var(--s-3);
  padding: var(--s-9) var(--s-4);
  border: 1px dashed var(--rule-strong);
  border-radius: var(--r-lg);
  text-align: center;
  color: var(--text-faint);
}

/* ===========================================================================
   Book charts — interactive companions to the printed tables.
   Mobile first. Every affordance works on touch; hover is an enhancement.
   =========================================================================== */

.bchart { margin: 0 0 var(--s-6); }

.bchart__scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 0 calc(var(--s-4) * -1);
  padding: 0 var(--s-4);
}

/* The SVG carries intrinsic width/height attributes, so constraining BOTH
   axes lets the browser scale it down while preserving the ratio. Width alone
   is not enough: a tall viewBox stretched to the container width renders over
   a thousand pixels high and pushes everything below it off the screen. */
.bchart__svg {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: min(46vh, 400px);
  margin: 0 auto;
  overflow: visible;
}

.bchart__svg--radar { max-height: min(52vh, 430px); }

/* --- structure ----------------------------------------------------------- */

.bchart__track {
  stroke: var(--rule-strong);
  stroke-width: 2;
  stroke-linecap: round;
}
.bchart__track--accent { stroke: var(--blue); }

.bchart__rowRule { stroke: var(--rule); stroke-width: 1; }
.bchart__ring    { fill: none; stroke: var(--rule); stroke-width: 1; }
.bchart__spoke   { stroke: var(--rule); stroke-width: 1; }

.bchart__shape {
  fill: var(--blue);
  fill-opacity: 0.1;
  stroke: none;
}
.bchart__outline {
  fill: none;
  stroke: var(--blue);
  stroke-width: 2.5;
  stroke-linejoin: round;
}

.bchart__dot {
  fill: var(--bone);
  stroke: var(--rule-strong);
  stroke-width: 2.5;
  transition: r 0.18s ease, stroke 0.18s ease, fill 0.18s ease;
}
.bchart__dot--accent { stroke: var(--blue); }

.bchart__hit { fill: transparent; cursor: pointer; }
.bchart__hit--dot { cursor: pointer; }

.bchart__row, .bchart__axis { cursor: pointer; outline: none; }

.bchart__row.is-on .bchart__rowRule { stroke: var(--ink); stroke-width: 2; }
.bchart__row.is-on .bchart__dot,
.bchart__axis.is-on .bchart__dot { r: 10; fill: var(--blue); stroke: var(--blue); }

.bchart__row:focus-visible .bchart__hit,
.bchart__axis:focus-visible .bchart__hit {
  fill: var(--blue-wash);
}

/* --- labels -------------------------------------------------------------- */

.bchart__colLabel, .bchart__axisLabel, .bchart__axisVal {
  font-family: var(--font-mono, ui-monospace, monospace);
  fill: var(--text-muted);
}
.bchart__rowLabel {
  font-family: var(--font-sans, inherit);
  font-size: 13px;
  font-weight: 600;
  fill: var(--text);
  text-anchor: end;
}
.bchart__row.is-on .bchart__rowLabel { fill: var(--blue-deep); }

.bchart__colLabel {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-anchor: middle;
}
.bchart__axisLabel { font-size: 12px; fill: var(--text); font-weight: 600; }
.bchart__axisVal   { font-size: 11px; }

/* --- line-draw animation ------------------------------------------------- */

.bchart__track, .bchart__outline {
  stroke-dasharray: 1400;
  stroke-dashoffset: 1400;
}
.bchart.is-drawn .bchart__track {
  transition: stroke-dashoffset 0.9s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: calc(var(--i, 0) * 90ms);
  stroke-dashoffset: 0;
}
.bchart.is-drawn .bchart__outline {
  transition: stroke-dashoffset 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.25s;
  stroke-dashoffset: 0;
}

.bchart__dot, .bchart__shape { opacity: 0; }
.bchart.is-drawn .bchart__dot {
  animation: bchartPop 0.4s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  animation-delay: calc(320ms + var(--i, 0) * 55ms);
}
.bchart.is-drawn .bchart__shape {
  animation: bchartFade 0.7s ease 0.5s forwards;
}

.bchart.is-still .bchart__track,
.bchart.is-still .bchart__outline { stroke-dashoffset: 0; }
.bchart.is-still .bchart__dot,
.bchart.is-still .bchart__shape { opacity: 1; }
.bchart.is-still .bchart__shape { opacity: 0.1; }

@keyframes bchartPop  { from { opacity: 0; } to { opacity: 1; } }
@keyframes bchartFade { from { opacity: 0; } to { opacity: 1; } }

/* --- chips --------------------------------------------------------------- */

.bchart__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: var(--s-4) 0 0;
  padding: 0;
}

.bchart__chip {
  font: inherit;
  font-size: 0.8rem;
  background: transparent;
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  color: var(--text-muted);
  padding: 7px 14px;
  cursor: pointer;
  min-height: 38px;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.bchart__chip:hover { border-color: var(--ink); color: var(--text); }
.bchart__chip.is-on {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--on-dark);
}
.bchart__chipVal {
  font-family: var(--font-mono, monospace);
  font-size: 0.72rem;
  opacity: 0.7;
  margin-left: 4px;
}

/* --- description panel --------------------------------------------------- */

.bchart__panel {
  margin-top: var(--s-4);
  padding: var(--s-4);
  background: var(--bone-2);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--blue);
  border-radius: 0 8px 8px 0;
  min-height: 128px;
}

.bchart__hint { color: var(--text-faint); margin: 0; font-size: 0.9rem; }

.bchart__panelTitle {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin: 0 0 0.7rem;
  font-family: var(--font-display, inherit);
  font-weight: 700;
  font-size: 1.05rem;
}
.bchart__panelScore {
  font-family: var(--font-mono, monospace);
  font-size: 0.85rem;
  color: var(--blue-deep);
}

.bchart__pairs { margin: 0 0 0.85rem; }
.bchart__pairs > div {
  display: grid;
  grid-template-columns: minmax(96px, 30%) 1fr;
  gap: 0.6rem;
  padding: 0.35rem 0;
  border-top: 1px solid var(--rule);
}
.bchart__pairs > div:first-child { border-top: 0; }
.bchart__pairs dt {
  font-family: var(--font-mono, monospace);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.bchart__pairs dd { margin: 0; font-size: 0.92rem; }

.bchart__scores { list-style: none; margin: 0 0 0.85rem; padding: 0; }
.bchart__scores li {
  display: grid;
  grid-template-columns: minmax(84px, 28%) 1fr 22px;
  align-items: center;
  gap: 0.6rem;
  padding: 0.28rem 0;
  font-size: 0.85rem;
}
.bchart__scores span:first-child { color: var(--text-muted); }
.bchart__bar {
  display: block;
  height: 7px;
  background: var(--bone-3);
  border-radius: 999px;
  overflow: hidden;
}
.bchart__bar i {
  display: block;
  height: 100%;
  background: var(--blue);
  border-radius: 999px;
  transition: width 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}
.bchart__scores b {
  font-family: var(--font-mono, monospace);
  font-size: 0.8rem;
  text-align: right;
}

.bchart__note {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--text-muted);
}

/* --- prose + fallback table ---------------------------------------------- */

.bchart__prose { margin-top: var(--s-6); }
.bchart__prose p { margin: 0 0 1rem; }

.bchart__foot {
  margin: var(--s-4) 0 0;
  font-size: 0.86rem;
  color: var(--text-faint);
  border-top: 1px solid var(--rule);
  padding-top: var(--s-3);
}

/* The table stays in the DOM for screen readers, search engines, and print,
   but the figure above is the visible representation. */
.bchart__table {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 640px) {
  /* Below this width the figure cannot stay legible while shrinking, so let it
     scroll sideways at a usable size instead of collapsing. */
  .bchart__svg { max-height: none; min-width: 460px; }
  .bchart__scroll { padding-bottom: 4px; }
  .bchart__rowLabel { font-size: 12px; }
  .bchart__panel { padding: var(--s-3); min-height: 150px; }
  .bchart__pairs > div { grid-template-columns: 1fr; gap: 0.15rem; }
  .bchart__colLabel { font-size: 11px; }
}

@media print {
  .bchart__table {
    position: static; width: auto; height: auto;
    clip: auto; white-space: normal; margin: 1rem 0;
    border-collapse: collapse;
  }
  .bchart__table th, .bchart__table td {
    border: 1px solid #999; padding: 6px 10px; text-align: left;
  }
  .bchart__legend, .bchart__panel { display: none; }
}

/* ===========================================================================
   Book landing page — /book
   Renders without site chrome. One conversion goal: the email list.
   =========================================================================== */

body.no-chrome #header-slot,
body.no-chrome #drawer-slot,
body.no-chrome #footer-slot { display: none; }

.bk { background: var(--bone); }
.bk-shell { width: min(1080px, 92vw); margin: 0 auto; }
.bk-band { padding: clamp(3rem, 8vw, 5.5rem) 0; }
.bk-band--bone2 { background: var(--bone-2); }
.bk-band--ink { background: var(--ink); color: var(--on-dark); }
.bk-band--ink .bk-h2 { color: var(--on-dark); }
.bk-band--ink .bk-p { color: var(--on-dark-muted); }

.bk-kicker {
  font-family: var(--font-mono, monospace);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--flare);
  margin: 0 0 0.9rem;
}

.bk-h2 {
  font-family: var(--font-display, inherit);
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 1.2rem;
}

.bk-p { font-size: 1.02rem; line-height: 1.7; margin: 0 0 1rem; color: var(--text-muted); }
.bk-p--lead { max-width: 62ch; margin-bottom: 2rem; }
.bk-inline { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }

/* --- hero ---------------------------------------------------------------- */

.bk-hero {
  position: relative;
  overflow: hidden;
  background: var(--bone);
  padding: clamp(2.5rem, 7vw, 5rem) 0 clamp(3rem, 7vw, 5rem);
  border-bottom: 1px solid var(--rule);
}

.bk-hero__inner {
  position: relative;
  z-index: 2;
  width: min(1080px, 92vw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr minmax(240px, 340px);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.bk-hero__title {
  font-family: var(--font-display, inherit);
  font-size: clamp(2rem, 5.4vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.04;
  margin: 0 0 1.3rem;
  max-width: 18ch;
}

.bk-hero__lead { font-size: clamp(1rem, 1.6vw, 1.12rem); line-height: 1.65; margin: 0 0 1rem; color: var(--text-muted); max-width: 54ch; }
.bk-hero__sub  { font-size: 1.02rem; font-weight: 600; margin: 0 0 1.8rem; max-width: 50ch; }
.bk-hero__note { font-size: 0.86rem; color: var(--text-faint); margin: 0.9rem 0 0; max-width: 48ch; line-height: 1.6; }

.bk-cover {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 3px;
  box-shadow: 0 1px 2px rgba(11,11,12,.14), 0 18px 44px -12px rgba(11,11,12,.34);
  transform: rotate(-1.1deg);
}

.bk-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }

.btn--disabled {
  opacity: 0.42;
  cursor: not-allowed;
  pointer-events: none;
  background: var(--ink);
  color: var(--on-dark);
  border: 1px solid var(--ink);
  border-radius: 2px;
  padding: 0.85rem 1.4rem;
  font-weight: 600;
  display: inline-flex;
  text-decoration: line-through;
}

.bk-status {
  font-family: var(--font-mono, monospace);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--flare);
  border: 1px solid currentColor;
  border-radius: 999px;
  padding: 5px 11px;
}

.bk-jump {
  display: inline-block;
  margin-top: 1.5rem;
  font-weight: 600;
  color: var(--blue);
  border-bottom: 2px solid var(--blue);
  padding-bottom: 2px;
}

/* --- animated field ------------------------------------------------------ */

.bk-field { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 1; opacity: 0.9; }
.bk-field__m { fill: var(--ink); animation: bkDrift 18s ease-in-out infinite alternate; animation-delay: var(--d, 0s); }
.bk-field__beam { stroke: var(--ink); stroke-width: 0.12; opacity: 0.1; animation: bkBeam 9s ease-in-out infinite alternate; animation-delay: var(--d, 0s); }
.bk-field__rule { stroke: var(--blue); stroke-width: 0.9; opacity: 0.16; }

@keyframes bkDrift {
  from { transform: translate3d(0,0,0); }
  to   { transform: translate3d(1.6%, -1.1%, 0); }
}
@keyframes bkBeam { from { opacity: 0.05; } to { opacity: 0.16; } }

/* --- problem / stat ------------------------------------------------------ */

.bk-split { display: grid; grid-template-columns: 1.4fr 1fr; gap: clamp(2rem, 5vw, 3.5rem); align-items: start; }

.bk-stat {
  display: block;
  padding: 1.6rem;
  border: 1px solid var(--ink-rule-2);
  border-left: 3px solid var(--flare);
  background: var(--ink-2);
  transition: background 0.18s ease, transform 0.18s ease;
}
.bk-stat:hover { background: var(--ink-3); transform: translateY(-2px); }
.bk-stat__fig { display: block; font-family: var(--font-display, inherit); font-size: 3rem; font-weight: 800; line-height: 1; color: var(--on-dark); }
.bk-stat__label { display: block; font-family: var(--font-mono, monospace); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--flare); margin: 0.5rem 0 0.9rem; }
.bk-stat__cap { display: block; font-size: 0.9rem; line-height: 1.6; color: var(--on-dark-muted); }
.bk-stat__cta { display: block; margin-top: 1rem; font-weight: 600; color: var(--blue-bright); }

/* --- parts --------------------------------------------------------------- */

.bk-parts { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1px; background: var(--rule); border: 1px solid var(--rule); }
.bk-part { background: var(--bone); padding: 1.6rem; }
.bk-part__num { font-family: var(--font-mono, monospace); font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--flare); }
.bk-part__title { font-family: var(--font-display, inherit); font-size: 1.05rem; font-weight: 700; margin: 0.5rem 0 0.6rem; line-height: 1.25; }
.bk-part__body { font-size: 0.92rem; line-height: 1.65; color: var(--text-muted); margin: 0; }

/* --- cards --------------------------------------------------------------- */

.bk-grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.2rem; }
.bk-card { background: var(--bone); border: 1px solid var(--rule); padding: 1.5rem; display: block; }
.bk-band--bone2 .bk-card { background: var(--bone); }
.bk-card__title { font-family: var(--font-display, inherit); font-size: 1.02rem; font-weight: 700; margin: 0 0 0.6rem; line-height: 1.3; }
.bk-card__body { font-size: 0.92rem; line-height: 1.65; color: var(--text-muted); margin: 0; }
.bk-card--link { transition: border-color 0.18s ease, transform 0.18s ease; }
.bk-card--link:hover { border-color: var(--ink); transform: translateY(-2px); }
.bk-card__cta { display: block; margin-top: 0.9rem; font-weight: 600; color: var(--blue); font-size: 0.9rem; }

/* --- qualifier ----------------------------------------------------------- */

.bk-two { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
.bk-listhead { font-family: var(--font-mono, monospace); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; margin: 0 0 0.9rem; }
.bk-listhead--yes { color: var(--blue); }
.bk-listhead--no { color: var(--text-faint); }
.bk-list { list-style: none; margin: 0; padding: 0; }
.bk-list li { position: relative; padding: 0.6rem 0 0.6rem 1.7rem; border-top: 1px solid var(--rule); font-size: 0.95rem; line-height: 1.55; }
.bk-list li::before { content: '✓'; position: absolute; left: 0; color: var(--blue); font-weight: 700; }
.bk-list--no li { color: var(--text-faint); }
.bk-list--no li::before { content: '×'; color: var(--text-faint); }

/* --- author + final ------------------------------------------------------ */

.bk-author { max-width: 68ch; }
.bk-author__role { font-family: var(--font-mono, monospace); font-size: 0.8rem; color: var(--text-faint); margin: -0.6rem 0 1.2rem; }

.bk-final { text-align: center; }
.bk-signup { max-width: 620px; margin: 0 auto; }
.bk-signup__title { font-family: var(--font-display, inherit); font-size: clamp(1.4rem, 3.2vw, 1.9rem); font-weight: 800; margin: 0 0 0.7rem; color: var(--on-dark); }
.bk-signup__body { font-size: 0.98rem; line-height: 1.65; color: var(--on-dark-muted); margin: 0 0 1.8rem; }
.bk-colophon { margin: 3rem 0 0; font-family: var(--font-mono, monospace); font-size: 0.72rem; letter-spacing: 0.06em; color: var(--on-dark-faint); }

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

@media (max-width: 860px) {
  .bk-split { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .bk-hero__inner { grid-template-columns: 1fr; }
  .bk-hero__art { order: -1; max-width: 230px; }
  .bk-hero__title { max-width: none; }
  .bk-field { opacity: 0.55; }
}

@media (prefers-reduced-motion: reduce) {
  .bk-field__m, .bk-field__beam { animation: none; }
  .bk-stat:hover, .bk-card--link:hover { transform: none; }
}

/* Hero signup. Above the fold on desktop, which is where most of the
   conversions on a page like this actually happen. */
.bk-heroform {
  margin-top: 1.6rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--rule);
  max-width: 30rem;
}
.bk-heroform .field__hint { color: var(--text-faint); }
.bk-jump { display: none; }