:root {
  --paper: #f7f4ec;
  --ink: #171717;
  --line: #cfc6b8;
  --accent: #b65d2a;
  --card: #fffcf5;
  --max-width: 1100px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Palatino Linotype", "Book Antiqua", Palatino, serif;
  color: var(--ink);
  background:
    radial-gradient(1100px 400px at 10% 0%, #f2ebde 10%, transparent 70%),
    radial-gradient(900px 300px at 90% 10%, #ece2d0 5%, transparent 60%),
    var(--paper);
  line-height: 1.5;
}

a {
  color: inherit;
}

.site-wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem;
}

.hero {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #fffdf6, #f8f2e7);
  padding: 1.2rem;
  border-radius: 12px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 8vw, 4rem);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero p {
  margin: 0.6rem 0 0;
  max-width: 72ch;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.pill {
  border: 1px solid var(--ink);
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  font-size: 0.85rem;
  background: #fff;
}

.section {
  margin-top: 1.5rem;
}

.section h2 {
  font-size: 1.3rem;
  margin: 0 0 0.8rem;
}

.form-card,
.contact-card {
  border: 1px solid var(--line);
  background: var(--card);
  padding: 1rem;
  border-radius: 10px;
}

.signup-form {
  display: grid;
  gap: 0.7rem;
}

.signup-form label {
  font-size: 0.95rem;
}

.signup-form input {
  width: 100%;
  font: inherit;
  padding: 0.65rem 0.7rem;
  border: 1px solid #a49b8d;
  border-radius: 8px;
  background: #fff;
}

.signup-form button,
.button-link {
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.02em;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #fff;
  padding: 0.65rem 0.95rem;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}

.button-link.secondary {
  background: transparent;
  color: var(--ink);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.chapter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 0.75rem;
}

.chapter-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
  text-decoration: none;
  color: inherit;
}

.chapter-card img {
  width: 100%;
  display: block;
  aspect-ratio: 5 / 7;
  object-fit: contain;
  object-position: center top;
  background: #fff;
}

.chapter-card .meta {
  padding: 0.65rem;
}

.chapter-card h3 {
  margin: 0;
  font-size: 1rem;
}

.chapter-card p {
  margin: 0.25rem 0 0;
  font-size: 0.9rem;
  color: #4b4b4b;
}

.reader-header {
  position: sticky;
  top: 0;
  z-index: 2;
  backdrop-filter: blur(6px);
  background: rgba(247, 244, 236, 0.9);
  border-bottom: 1px solid var(--line);
}

.reader-top {
  max-width: 900px;
  margin: 0 auto;
  padding: 0.8rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.reader-main {
  max-width: 900px;
  margin: 0 auto;
  padding: 1rem;
}

.page-stack {
  display: grid;
  gap: 1.75rem;
  justify-items: center;
}

.page-stack img {
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: calc(100vh - 8rem);
  display: block;
  border: 6px solid #000;
  outline: 1px solid #000;
  outline-offset: 0;
  border-radius: 2px 5px 3px 6px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.15);
  background: #fff;
}

.reader-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 1.2rem;
  gap: 0.7rem;
}

.reader-nav a {
  flex: 1;
  text-align: center;
}

.small {
  font-size: 0.86rem;
  color: #5f5f5f;
}

@media (min-width: 760px) {
  .site-wrap {
    padding: 1.4rem;
  }

  .page-stack {
    gap: 2.25rem;
  }

  .page-stack img {
    max-height: calc(100vh - 9rem);
  }

  .chapter-grid {
    gap: 1rem;
  }

  .section-columns {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 1rem;
  }
}

@media (min-width: 1100px) {
  .chapter-grid {
    gap: 1rem;
  }
}