.letter-page {
  padding-top: 50px;
  padding-bottom: 90px;
}

.letter-container {
  max-width: 820px;
  margin: 0 auto;
}

.letter-header {
  border-bottom: 1px solid var(--line);
  padding-bottom: 35px;
  margin-bottom: 40px;
}

.letter-header h1 {
  font-size: clamp(2.4rem, 4.5vw, 3.8rem);
  letter-spacing: -0.05em;
  line-height: 1.15;
  margin-top: 15px;
  margin-bottom: 20px;
}

.letter-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 15px;
}

.letter-meta strong {
  color: var(--ink);
  font-weight: 600;
}

.letter-meta .dot {
  color: var(--line);
}

.callout-quote {
  background: var(--pale);
  border-left: 4px solid var(--blue);
  border-radius: 0 8px 8px 0;
  padding: 24px 28px;
  margin: 30px 0 45px;
  font-size: 19px;
  line-height: 1.6;
  color: var(--navy);
  font-style: italic;
}

.letter-body {
  font-size: 17px;
  line-height: 1.75;
  color: #2c3e50;
}

.letter-body p {
  margin-bottom: 24px;
}

.letter-body h2 {
  font-size: clamp(1.6rem, 2.5vw, 2.1rem);
  letter-spacing: -0.035em;
  margin-top: 52px;
  margin-bottom: 18px;
  color: var(--navy);
}

.letter-body h3 {
  font-size: 1.25rem;
  margin-top: 28px;
  margin-bottom: 10px;
  color: var(--navy);
}

.letter-body hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 48px 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin: 28px 0 36px;
}

.feature-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px 24px;
  background: #fff;
  box-shadow: 0 2px 6px rgba(11, 28, 51, 0.04);
}

.feature-card h3 {
  font-size: 1.05rem;
  margin: 0 0 8px;
  color: var(--blue);
  font-family: Manrope, sans-serif;
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-card p {
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--muted);
  margin: 0;
}

.highlight-box {
  background: #f0f7ff;
  border: 1px solid #c8e1ff;
  border-radius: 8px;
  padding: 26px 30px;
  margin: 32px 0 36px;
}

.highlight-box h3 {
  margin-top: 0;
  margin-bottom: 12px;
  color: var(--navy);
  font-size: 1.25rem;
}

.highlight-box p {
  margin-bottom: 14px;
  font-size: 16px;
  color: #1e3a5f;
}

.highlight-box p:last-child {
  margin-bottom: 0;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 0;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 20px;
  background: #e1effe;
  color: var(--blue);
}

.pricing-box {
  background: var(--navy);
  color: #fff;
  border-radius: 9px;
  padding: 34px 38px;
  margin: 35px 0 40px;
}

.pricing-box h3 {
  color: #fff;
  margin-top: 0;
  font-size: 1.4rem;
  letter-spacing: -0.02em;
}

.pricing-box p {
  color: #cbdbee;
  font-size: 16px;
  line-height: 1.65;
}

.tier-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 24px;
}

.tier-item {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 7px;
  padding: 20px 22px;
}

.tier-item .tier-title {
  font-family: Manrope, sans-serif;
  font-weight: 700;
  font-size: 18px;
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
}

.tier-item .tier-price {
  color: #60a5fa;
  font-size: 20px;
  font-weight: 800;
}

.tier-item p {
  font-size: 14px;
  color: #cbdbee;
  margin: 0;
}

.signoff-section {
  margin-top: 48px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.signoff-name {
  font-family: Manrope, sans-serif;
  font-size: 22px;
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 2px;
}

.signoff-title {
  color: var(--muted);
  font-size: 15px;
}

.letter-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 40px;
}

.golden-rule-card {
  background: #f8fafc;
  border: 2px solid var(--blue);
  border-radius: 9px;
  padding: 24px 28px;
  margin: 32px 0 36px;
}

.golden-rule-card .eyebrow {
  margin-bottom: 8px;
  font-size: 11px;
  letter-spacing: 0.12em;
}

.golden-rule-card p {
  font-family: Manrope, sans-serif;
  font-size: 20px;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.45;
  margin: 0;
}

.diff-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 28px 0 40px;
}

.diff-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px 24px;
  background: #fff;
  box-shadow: 0 1px 4px rgba(11, 28, 51, 0.04);
}

.diff-header {
  margin-bottom: 14px;
}

.diff-header h4 {
  font-family: Manrope, sans-serif;
  font-size: 17px;
  font-weight: 700;
  color: var(--navy);
  margin: 0;
}

.diff-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.diff-col {
  font-size: 14.5px;
  line-height: 1.6;
}

.diff-col.old {
  color: #5d6d7e;
  border-right: 1px solid var(--line);
  padding-right: 24px;
}

.diff-col.old .diff-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #991b1b;
  background: #fee2e2;
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 6px;
}

.diff-col.new {
  color: var(--ink);
}

.diff-col.new .diff-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #1d4ed8;
  background: #dbeafe;
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 6px;
}

@media (max-width: 760px) {
  .letter-page {
    padding-top: 30px;
    padding-bottom: 60px;
  }
  .feature-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .tier-comparison {
    grid-template-columns: 1fr;
  }
  .pricing-box {
    padding: 24px 20px;
  }
  .highlight-box {
    padding: 20px;
  }
  .callout-quote {
    padding: 18px 20px;
    font-size: 17px;
  }
  .golden-rule-card {
    padding: 20px 22px;
  }
  .golden-rule-card p {
    font-size: 18px;
  }
  .diff-columns {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .diff-col.old {
    border-right: none;
    border-bottom: 1px solid var(--line);
    padding-right: 0;
    padding-bottom: 14px;
  }
}