:root {
  --bg-primary: #f3f4f6;
  --bg-secondary: #ffffff;
  --text-primary: #111827;
  --text-secondary: #374151;
  --accent: #0f4c81;
  --accent-soft: #dbe8f5;
  --border: #d1d5db;
  --shadow: 0 14px 42px rgba(17, 24, 39, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Manrope", sans-serif;
  color: var(--text-primary);
  background:
    radial-gradient(circle at 12% 8%, #e5edf6 0, transparent 45%),
    radial-gradient(circle at 88% 86%, #e6edf3 0, transparent 36%),
    linear-gradient(160deg, #f9fafb 0%, var(--bg-primary) 100%);
  line-height: 1.7;
}

.letter-page {
  width: min(760px, 90vw);
  margin: 3rem auto;
  padding-top: 20px;
}

.letter-card {
  background: linear-gradient(180deg, #ffffff 0%, #fbfcfd 100%);
  border: 1px solid var(--border);
  border-radius: 22px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.letter-header {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 1.5rem;
  align-items: center;
  padding: 2.25rem 2.5rem;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(120deg, #f8fbff 0%, #eef4fa 100%);
}

.profile-photo {
  width: 150px;
  height: 150px;
  border-radius: 18px;
  object-fit: cover;
  border: 3px solid #ffffff;
  box-shadow: 0 10px 24px rgba(15, 76, 129, 0.22);
}

.letter-intro h1 {
  margin: 0.35rem 0 0.75rem;
  font-family: "Newsreader", serif;
  font-weight: 600;
  font-size: clamp(1.8rem, 3.6vw, 2.45rem);
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: #0b1f33;
}

.eyebrow {
  margin: 0;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 800;
  color: var(--accent);
}

.lead {
  margin: 0;
  color: var(--text-secondary);
  max-width: 64ch;
}

.letter-section {
  padding: 1.7rem 2.5rem;
  border-bottom: 1px solid #e5e7eb;
}

.letter-section:last-child {
  border-bottom: none;
}

.letter-section h2 {
  margin: 0 0 0.7rem;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-weight: 800;
  color: var(--accent);
}

.letter-section p {
  margin: 0;
  color: #1f2937;
  max-width: 66ch;
}

.letter-section-contact {
  background: linear-gradient(180deg, #fafcff 0%, #f3f8fd 100%);
}

@media (max-width: 820px) {
  .letter-page {
    width: min(760px, 94vw);
    margin: 1.6rem auto;
  }

  .letter-header {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 1.5rem;
  }

  .profile-photo {
    width: 120px;
    height: 120px;
  }

  .letter-section {
    padding: 1.2rem 1.5rem;
  }
}

/* Fondo de página para inicio y contacto */
.page-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  z-index: -1;
  opacity: 0.15;
}