/* V0.8.14 — public letter reading experience */
.letter-page {
  background: #fff;
  color: #171717;
}

.letter-hero {
  padding: 74px 0 64px;
  background:
    radial-gradient(circle at 78% 18%, rgba(116, 83, 234, .10), transparent 27%),
    linear-gradient(135deg, #f8f2e8 0%, #fbf7f0 52%, #ffffff 100%);
  border-bottom: 1px solid #e9e2d8;
}

.letter-hero-inner {
  max-width: 910px;
}

.letter-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: #6f55d8;
}

.letter-kicker::before {
  content: "";
  width: 26px;
  height: 2px;
  background: #6f55d8;
}

.letter-hero h1 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(42px, 5.2vw, 72px);
  line-height: 1.07;
  letter-spacing: -.045em;
  font-weight: 850;
}

.letter-deck {
  max-width: 700px;
  margin-top: 24px;
  font-size: 19px;
  line-height: 1.8;
  color: #5e5b56;
}

.letter-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 34px;
  font-size: 13px;
  color: #77726b;
}

.letter-shell {
  padding: 78px 0 96px;
  background: #fff;
}

.letter-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 780px minmax(0, 1fr);
}

.letter-article {
  grid-column: 2;
  min-width: 0;
  font-size: 17px;
  line-height: 2.02;
  color: #252525;
}

.letter-article > p {
  margin: 0 0 1.45em;
}

.letter-article .opening {
  font-size: 19px;
  line-height: 1.95;
  color: #1d1d1d;
}

.letter-article h2 {
  margin: 72px 0 24px;
  padding-top: 8px;
  font-size: 28px;
  line-height: 1.34;
  letter-spacing: -.025em;
  font-weight: 820;
  color: #111;
}

.letter-article h2::before {
  content: "";
  display: block;
  width: 34px;
  height: 3px;
  margin-bottom: 17px;
  background: #7459df;
}

.letter-emphasis {
  margin: 38px 0;
  padding: 28px 30px;
  border-left: 4px solid #7559df;
  background: #f8f7fc;
  font-size: 20px;
  line-height: 1.75;
  font-weight: 740;
  color: #171717;
}

.letter-article blockquote {
  margin: 28px 0;
  padding: 0 0 0 22px;
  border-left: 2px solid #d8d3cb;
  color: #55514c;
  font-size: 16px;
  line-height: 1.9;
}

.letter-article strong {
  color: #111;
}

.letter-signoff {
  margin-top: 72px;
  padding-top: 38px;
  border-top: 1px solid #e9e9e7;
}

.letter-signoff p {
  margin: 0 0 8px;
}

.letter-signature {
  margin-top: 34px;
  font-size: 16px;
  line-height: 1.8;
  color: #252525;
}

.letter-signature strong {
  font-size: 18px;
}

.letter-return {
  margin-top: 62px;
  padding: 28px 0 0;
  border-top: 1px solid #eeeeec;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.letter-return p {
  margin: 0;
  max-width: 470px;
  font-size: 14px;
  line-height: 1.7;
  color: #77736e;
}

.letter-return .btn {
  flex: 0 0 auto;
}

/* Prominent entry on migration page */
.migration-letter-entry {
  margin-top: 28px;
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.migration-letter-entry .letter-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border-radius: 10px;
  background: #171717;
  color: #fff;
  text-decoration: none;
  font-weight: 760;
  letter-spacing: -.01em;
  transition: transform .16s ease, background .16s ease;
}

.migration-letter-entry .letter-btn::after {
  content: "↗";
  margin-left: 13px;
  font-size: 17px;
  opacity: .82;
}

.migration-letter-entry .letter-context {
  max-width: 300px;
  font-size: 13px;
  line-height: 1.55;
  color: #716d67;
}

@media (hover:hover) and (pointer:fine) {
  .migration-letter-entry .letter-btn:hover {
    transform: translateY(-1px);
    background: #292929;
  }
}

@media (max-width: 900px) {
  .letter-hero { padding: 58px 0 50px; }
  .letter-layout { grid-template-columns: minmax(0, 1fr); }
  .letter-article { grid-column: 1; }
  .letter-shell { padding: 58px 0 76px; }
}

@media (max-width: 640px) {
  .letter-hero h1 { font-size: 40px; }
  .letter-deck { font-size: 17px; }
  .letter-article { font-size: 16px; line-height: 1.96; }
  .letter-article .opening { font-size: 17px; }
  .letter-article h2 { margin-top: 58px; font-size: 25px; }
  .letter-emphasis { margin: 30px 0; padding: 22px 20px; font-size: 18px; }
  .letter-return { align-items: flex-start; flex-direction: column; }
  .migration-letter-entry { align-items: flex-start; flex-direction: column; }
}

/* V12.58 — align letter hero and article to one reading column */
.letter-hero-inner{max-width:780px!important;margin-left:auto!important;margin-right:auto!important;padding-left:0!important;padding-right:0!important}
.letter-layout{display:block!important;max-width:780px!important;margin-left:auto!important;margin-right:auto!important}
.letter-article{max-width:780px!important;margin:0 auto!important}
@media(max-width:900px){.letter-hero-inner,.letter-layout,.letter-article{max-width:780px!important}}

/* V12.58.1 — Letter sticky header must fully occlude scrolling article content. */
.letter-page .site-header {
  background: #fff !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}

/* V13.03 RC2 — questionnaire is a direct, obvious action beside the letter. */
.migration-letter-entry .survey-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border-radius: 10px;
  border: 1px solid #cfc8bf;
  background: rgba(255,255,255,.72);
  color: #24211f;
  text-decoration: none;
  font-weight: 760;
  letter-spacing: -.01em;
  transition: transform .16s ease, border-color .16s ease, background .16s ease;
}
@media (hover:hover) and (pointer:fine) {
  .migration-letter-entry .survey-btn:hover {
    transform: translateY(-1px);
    border-color: #aaa29a;
    background: #fff;
  }
}
@media (max-width: 760px) {
  .migration-letter-entry { width:100%; gap:12px; }
  .migration-letter-entry .letter-btn,
  .migration-letter-entry .survey-btn { width:100%; box-sizing:border-box; }
}