:root {
  /* Core palette and scale tokens. */
  --color-bg: #fafafa;
  --color-text: #1a1a1a;
  --color-accent: #888;
  --color-nav: #666;
  --color-placeholder: #e8e8e8;
  --color-border: #e3e3e3;

  --font-heading: "Cormorant Garamond", serif;
  --font-meta: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --font-size-site-title: 1.1rem;
  --font-size-nav: 0.75rem;
  --font-size-body: 1.05rem;
  --font-size-caption: 0.9rem;
  --line-height-body: 1.75;
  --letter-spacing-meta: 0.18em;

  --space-2xs: 0.5rem;
  --space-xs: 0.75rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 5rem;
  --space-3xl: 7rem;
  --space-hero-top: 2.75rem;
  --space-book-top: 4.5rem;
  --space-book-meta-top: 1rem;
  --space-book-copy-top: 1.25rem;
  --space-book-viewer-top: 3.5rem;
  --space-book-thumbs-top: 1.5rem;
  --space-book-purchase-top: 3.5rem;
  --space-book-bottom: 6rem;
  --space-book-thumb-gap: 0.5rem;
  --book-viewer-height: 520px;
  --book-meta-font-size: 0.75rem;
  --book-meta-letter-spacing: 0.18em;
  --book-thumb-border-width: 1px;

  --container-width: 72rem;
  --hero-max-width: 64rem;
}

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

html {
  background: var(--color-bg);
  color: var(--color-text);
}

body {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(calc(100% - (var(--space-lg) * 2)), var(--container-width));
  margin: 0 auto;
}

/* Minimal header with quiet separation. */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  width: min(calc(100% - (var(--space-lg) * 2)), var(--container-width));
  margin: 0 auto;
  padding: var(--space-md) 0;
}

.site-title {
  margin: 0;
  font-size: var(--font-size-site-title);
  font-weight: 400;
  line-height: 1.2;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  font-family: var(--font-heading);
  font-size: var(--font-size-nav);
  letter-spacing: var(--letter-spacing-meta);
  text-transform: uppercase;
  color: var(--color-nav);
}

/* Featured image placeholder and caption. */
.hero {
  padding-top: var(--space-hero-top);
}

.hero-figure {
  width: min(100%, var(--hero-max-width));
  margin: 0 auto;
}

.hero-image {
  aspect-ratio: 3 / 2;
  display: block;
  width: 100%;
  max-height: 520px;
  object-fit: cover;
  object-position: center;
}

.hero-caption {
  margin: var(--space-sm) 0 0;
  font-size: var(--font-size-caption);
  font-style: italic;
  text-align: center;
}

.page-copy {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-3xl);
}

.page-copy p {
  max-width: 34rem;
  margin: 0;
  text-align: left;
}

.page-copy p + p {
  margin-top: var(--space-md);
}

.page-copy--centered p {
  margin: 0 auto;
  text-align: center;
}

/* Book page */
.book-page {
  padding-top: var(--space-book-top);
  padding-bottom: var(--space-book-bottom);
}

.book-header {
  max-width: 42rem;
  margin: 0 auto;
  text-align: center;
}

.book-title {
  margin: 0;
  font-size: 2rem;
  font-weight: 400;
  line-height: 1.1;
}

.book-meta {
  margin: var(--space-book-meta-top) 0 0;
  font-family: var(--font-heading);
  font-size: var(--book-meta-font-size);
  letter-spacing: var(--book-meta-letter-spacing);
  text-transform: uppercase;
  color: var(--color-accent);
}

.book-description {
  max-width: 40rem;
  margin: var(--space-book-copy-top) auto 0;
  text-align: center;
}

.book-viewer {
  margin-top: var(--space-book-viewer-top);
}

.book-viewer-frame {
  height: var(--book-viewer-height);
  background: var(--color-placeholder);
}

.book-viewer-frame img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.book-main-image {
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
}

.book-thumbnails {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: var(--space-book-thumb-gap);
  margin-top: var(--space-book-thumbs-top);
}

.book-thumbnail {
  aspect-ratio: 3 / 2;
  background: #e0e0e0;
  border: var(--book-thumb-border-width) solid transparent;
  cursor: pointer;
  overflow: hidden;
}

.book-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.book-thumbnail.is-active {
  border-color: var(--color-text);
}

.purchase-line {
  margin-top: var(--space-book-purchase-top);
  text-align: center;
}

.purchase-line p {
  margin: 0;
  font-family: var(--font-meta);
  font-size: var(--font-size-nav);
  font-weight: 400;
  color: var(--color-accent);
}

@media (max-width: 900px) {
  .book-thumbnails {
    grid-template-columns: repeat(5, 1fr);
  }
}

/* Contact form */
.contact-wrap {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-3xl);
}

.contact-form,
#form-success {
  max-width: 30rem;
  margin: 0 auto;
}

.form-field {
  display: flex;
  flex-direction: column;
  margin-bottom: 2rem;
}

.form-field label {
  font-family: var(--font-heading);
  font-size: var(--font-size-nav);
  letter-spacing: var(--letter-spacing-meta);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.form-field input,
.form-field textarea {
  -webkit-appearance: none;
  appearance: none;
  font-family: var(--font-heading);
  font-size: var(--font-size-body);
  color: var(--color-text);
  background: var(--color-bg);
  border: none;
  border-bottom: 1px solid var(--color-border);
  border-radius: 0;
  box-shadow: none;
  padding: var(--space-2xs) 0;
  outline: none;
  width: 100%;
  resize: none;
  line-height: var(--line-height-body);
  box-sizing: border-box;
}

.form-field textarea {
  height: 160px;
  vertical-align: top;
}

.form-field input:focus,
.form-field textarea:focus {
  border-bottom-color: var(--color-text);
}

.form-actions {
  margin-top: var(--space-lg);
}

.form-submit {
  -webkit-appearance: none;
  appearance: none;
  font-family: var(--font-heading);
  font-size: var(--font-size-nav);
  letter-spacing: var(--letter-spacing-meta);
  text-transform: uppercase;
  color: var(--color-nav);
  background: none;
  border: none;
  border-radius: 0;
  box-shadow: none;
  padding: 0;
  cursor: pointer;
}

.form-submit:hover {
  color: var(--color-text);
}

.form-success-message {
  font-style: italic;
  color: var(--color-accent);
  text-align: center;
  padding-top: var(--space-xl);
}

.site-footer {
  padding: 0 0 var(--space-xl);
  text-align: center;
  color: var(--color-accent);
}

.site-footer p {
  margin: 0;
  font-family: var(--font-meta);
  font-size: var(--font-size-nav);
  font-weight: 400;
  letter-spacing: normal;
  text-transform: none;
}