*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: #F9F8F6;
  color: #1A1A1A;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 18px;
  font-weight: 300;
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── WRAPPER ── */
.page {
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* ── LETTER BLOCK ── */
.letter {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  max-width: 600px;
  margin: 0 auto;
  padding: 0 40px;
  width: 100%;
}

/* ── HEADLINE ── */
.headline {
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 300;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #1A1A1A;
  margin-bottom: 52px;
}

/* ── BODY COPY ── */
.body-text {
  font-size: 18px;
  font-weight: 300;
  line-height: 1.75;
  color: #1A1A1A;
  margin-bottom: 14px;
}
.body-text:last-of-type { margin-bottom: 52px; }

.body-text strong {
  font-weight: 500;
}

/* ── CTA ── */
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #1A1A1A;
  color: #F9F8F6;
  border: none;
  border-radius: 6px;
  padding: 14px 28px;
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, transform 0.1s;
}
.cta-btn:hover {
  background: #333;
}
.cta-btn:active {
  transform: scale(0.98);
}
.cta-btn .arrow {
  font-size: 16px;
  transition: transform 0.2s;
}
.cta-btn:hover .arrow {
  transform: translateX(3px);
}

/* ── CREDENTIALS ── */
.credentials {
  color: #666;
}

/* ── FOUNDERS ── */
.founders {
  margin-top: 72px;
  font-size: 13px;
  font-weight: 300;
  color: #aaa;
  letter-spacing: 0.02em;
}

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  .letter { padding: 0 24px; max-width: 100%; }
  .salutation { font-size: 36px; margin-bottom: 36px; }
  .body-text { font-size: 17px; }
}