/* Preface — two quiet editorial pages before the formal introduction. */
.preface-view {
  --preface-navy: #123d78;
  --preface-cyan: #19b9c5;
  --preface-amber: #f1b84a;
  --preface-orange: #e77b4b;
  --preface-ink: #24313a;
  --preface-muted: #65747c;
}

.preface-page {
  min-height: 1300px;
  padding: clamp(58px, 8vw, 92px) clamp(42px, 9vw, 108px) 106px;
  font-family: var(--reading);
}

.preface-header {
  display: grid;
  grid-template-columns: 1fr minmax(260px, .55fr);
  align-items: end;
  padding-bottom: 34px;
  border-bottom: 2px solid var(--preface-navy);
}

.preface-header > p,
.preface-continuation-head > p {
  grid-column: 1 / -1;
  margin: 0 0 15px;
  color: var(--preface-cyan);
  font: 750 .66rem/1 var(--sans);
  letter-spacing: .16em;
  text-transform: uppercase;
}

.preface-header h1 {
  margin: 0;
  color: var(--preface-navy);
  font: 780 clamp(5.5rem, 10vw, 9rem)/.76 var(--sans);
  letter-spacing: -.065em;
  text-transform: uppercase;
}

.preface-header > span {
  padding-left: 28px;
  border-left: 4px solid var(--preface-amber);
  color: var(--preface-muted);
  font: italic 400 1.18rem/1.55 var(--serif);
}

.preface-opening-grid {
  display: grid;
  grid-template-columns: 145px minmax(0, 700px);
  gap: clamp(34px, 5vw, 62px);
  justify-content: center;
  margin-top: 68px;
}

.preface-date {
  align-self: start;
  padding-top: 11px;
  border-top: 5px solid var(--preface-cyan);
  color: var(--preface-navy);
  font-family: var(--sans);
}

.preface-date b {
  display: block;
  font-size: 4.7rem;
  line-height: .9;
  letter-spacing: -.06em;
}

.preface-date span,
.preface-date small {
  display: block;
  margin-top: 8px;
  font-weight: 700;
  line-height: 1.2;
  text-transform: uppercase;
}

.preface-date span { color: var(--preface-orange); font-size: .78rem; letter-spacing: .1em; }
.preface-date small { padding-top: 14px; border-top: 1px solid #bdc9ca; color: var(--preface-muted); font-size: .62rem; letter-spacing: .08em; }

.preface-prose {
  color: var(--preface-ink);
  font-size: clamp(1.12rem, calc(1.02rem + .25vw), 1.25rem);
  line-height: 1.74;
  letter-spacing: .006em;
}

.preface-prose-wide {
  max-width: 760px;
  margin: 54px auto 0;
}

.preface-prose p {
  margin: 0 0 1.18em;
}

.preface-prose strong {
  color: var(--preface-navy);
}

.preface-devotion {
  margin-bottom: .35em !important;
  color: var(--preface-navy);
  font: 780 .8rem/1 var(--sans);
  letter-spacing: .15em;
  text-transform: uppercase;
}

.preface-prose blockquote {
  margin: 30px 0;
  padding: 22px 0 22px 30px;
  border-left: 4px solid var(--preface-amber);
  color: var(--preface-navy);
  font: italic 400 clamp(1.55rem, 2.7vw, 2.2rem)/1.35 var(--serif);
}

.preface-shift {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 25px;
  align-items: center;
  margin: 68px 0 0;
  padding: 40px;
  background: #e6f0ef;
}

.preface-shift blockquote {
  margin: 0;
  color: var(--preface-navy);
  font: italic 400 clamp(1.45rem, 2.5vw, 2rem)/1.32 var(--serif);
  text-align: center;
}

.preface-shift blockquote:last-child { font-weight: 700; }
.preface-shift i { color: var(--preface-orange); font: 400 2.3rem/1 var(--serif); font-style: normal; }

.preface-central {
  max-width: 900px;
  margin: 58px auto;
  padding: 43px clamp(30px, 6vw, 70px);
  background: var(--preface-navy);
  color: white;
  font: italic 400 clamp(2rem, 4.1vw, 3.45rem)/1.18 var(--serif);
  text-align: center;
}

.preface-principles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin-top: 40px;
  background: #b9cbcc;
  border-top: 5px solid var(--preface-cyan);
}

.preface-principles article {
  padding: 35px;
  background: #f7f8f4;
}

.preface-principles span,
.preface-parts span {
  color: var(--preface-orange);
  font: 750 .63rem/1 var(--sans);
  letter-spacing: .12em;
  text-transform: uppercase;
}

.preface-principles h2 {
  margin: 12px 0;
  color: var(--preface-navy);
  font: 750 clamp(1.45rem, 2.4vw, 2rem)/1.05 var(--sans);
  letter-spacing: -.025em;
}

.preface-principles p,
.preface-parts p {
  margin: 0;
  color: #48575f;
  font-size: 1.05rem;
  line-height: 1.62;
}

.preface-continuation-head {
  display: grid;
  grid-template-columns: 1fr .8fr;
  align-items: end;
  padding-bottom: 42px;
  border-bottom: 2px solid var(--preface-navy);
}

.preface-continuation-head h2 {
  margin: 0;
  color: var(--preface-navy);
  font: 780 clamp(4rem, 7vw, 6.3rem)/.82 var(--sans);
  letter-spacing: -.055em;
  text-transform: uppercase;
}

.preface-continuation-head h2 em {
  color: var(--preface-orange);
  font-family: var(--serif);
  font-weight: 400;
  text-transform: none;
}

.preface-continuation-head blockquote {
  margin: 0;
  padding-left: 28px;
  border-left: 4px solid var(--preface-amber);
  color: var(--preface-muted);
  font: italic 400 1.2rem/1.55 var(--serif);
}

.preface-parts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin: 44px 0 60px;
  padding: 32px 0;
  border-block: 1px solid #bdc9ca;
}

.preface-parts article {
  padding-top: 15px;
  border-top: 4px solid var(--preface-cyan);
}

.preface-parts p { margin-top: 13px; }

.preface-journey {
  margin: 46px 0 62px;
  padding: 42px 35px 26px;
  background: var(--preface-navy);
  color: white;
}

.preface-journey > div {
  display: flex;
  align-items: center;
}

.preface-journey span {
  flex: 1;
  color: white;
  font: 700 clamp(.8rem, 1.3vw, 1rem)/1.35 var(--sans);
  letter-spacing: .03em;
  text-align: center;
  text-transform: uppercase;
}

.preface-journey i {
  color: var(--preface-amber);
  font-style: normal;
}

.preface-journey figcaption {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid #506f91;
  color: #b8c9d8;
  font-size: .92rem;
  text-align: center;
}

.preface-where {
  margin: 54px 0;
  padding: 52px 28px;
  border-block: 1px solid var(--preface-navy);
  color: var(--preface-navy);
  font: italic 400 clamp(3rem, 7vw, 6rem)/1 var(--serif);
  text-align: center;
}

.preface-start-small {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: 46px 0 66px;
  background: #b9cbcc;
  border: 1px solid #b9cbcc;
}

.preface-start-small span {
  min-height: 100px;
  display: grid;
  place-items: center;
  padding: 18px;
  background: #f7f8f4;
  color: var(--preface-navy);
  font: 700 .78rem/1.35 var(--sans);
  text-align: center;
}

.preface-closing {
  padding: 55px clamp(28px, 7vw, 80px);
  background: #e6f0ef;
  color: var(--preface-ink);
  text-align: center;
}

.preface-closing p {
  margin: 0 0 12px;
  font-size: 1.15rem;
  line-height: 1.55;
}

.preface-closing strong {
  display: block;
  margin: 16px 0 45px;
  color: var(--preface-orange);
  font: italic 400 clamp(2.4rem, 5vw, 4rem)/1 var(--serif);
}

.preface-closing b {
  display: block;
  color: var(--preface-navy);
  font: 750 .72rem/1 var(--sans);
  letter-spacing: .13em;
  text-transform: uppercase;
}

@media (max-width: 760px) {
  .preface-page { min-height: 0; padding: 52px 25px 90px; }
  .preface-header,
  .preface-continuation-head { grid-template-columns: 1fr; }
  .preface-header > span,
  .preface-continuation-head blockquote { margin-top: 30px; }
  .preface-opening-grid { grid-template-columns: 1fr; margin-top: 45px; }
  .preface-date { display: grid; grid-template-columns: auto 1fr auto; gap: 12px; align-items: end; }
  .preface-date span,
  .preface-date small { margin: 0; }
  .preface-date small { padding: 0 0 0 14px; border-top: 0; border-left: 1px solid #bdc9ca; }
  .preface-shift { grid-template-columns: 1fr; padding: 30px 22px; }
  .preface-shift i { transform: rotate(90deg); text-align: center; }
  .preface-principles,
  .preface-parts,
  .preface-start-small { grid-template-columns: 1fr; }
  .preface-journey > div { align-items: stretch; flex-direction: column; gap: 10px; }
  .preface-journey span { padding: 10px; }
  .preface-journey i { transform: rotate(90deg); }
}

@media print {
  .preface-page { width: 100%; margin: 0; box-shadow: none; break-after: page; }
}