/* =========================================================================
   RISE OF THE DEGENERACY — skeleton stylesheet
   A novel told on two threads, 6,000 years apart: Ubaid Sumer and
   Mesolithic/Neolithic Britain. Two accent colours (clay + flint) run
   through headings and rules as a quiet visual thread tying the two
   settings together — they meet at every heading, the way the two
   storylines meet across the book.

   Sections below:
     1. Design tokens (colours, type, spacing)
     2. Reset / base
     3. Typography (incl. the auto-indent rule)
     4. Header / footer
     5. Navigation (chapter list + prev/next)
     6. Article & sections
     7. Responsive tweaks
     8. Accessibility
   ========================================================================= */

/* -------------------------------------------------------------------------
   1. Design tokens
   ------------------------------------------------------------------------- */
:root {
  /* Ubaid Sumer thread — sun-baked mudbrick, river silt, ochre pigment */
  --clay: #a8582f;
  --ochre: #bd8f3a;

  /* Mesolithic/Neolithic Britain thread — flint, moss, bog-oak */
  --flint: #4f5d52;
  --moss: #6d7c5f;

  /* Shared ground */
  --ink: #2b241c;          /* body text */
  --ink-soft: #57503f;     /* secondary text */
  --parchment: #ece3cf;    /* page background */
  --bone: #f6f1e3;         /* card / nav background */
  --hairline: #cfc2a1;     /* dividers */

  /* Type */
  --font-display: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --font-body: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-utility: "Source Serif 4", Georgia, serif;

  /* Layout */
  --measure: 42em;         /* comfortable reading width */
  --gutter: clamp(1rem, 4vw, 3rem);
  --radius: 2px;
}

/* -------------------------------------------------------------------------
   2. Reset / base
   ------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--parchment);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.94rem + 0.3vw, 1.125rem);
  line-height: 1.65;
}

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

a {
  color: var(--clay);
}

a:hover,
a:focus-visible {
  color: var(--flint);
}

/* -------------------------------------------------------------------------
   3. Typography
   ------------------------------------------------------------------------- */
h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.2;
  font-weight: 600;
  margin: 1.4em 0 0.6em;
}

h1 {
  font-size: clamp(2rem, 1.5rem + 2vw, 3rem);
  margin-top: 0;
}

h2 {
  font-size: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  padding-left: 0.6em;
  border-left: 4px solid;
  border-image: linear-gradient(var(--clay), var(--flint)) 1;
}

h3 {
  font-size: clamp(1.2rem, 1.1rem + 0.5vw, 1.5rem);
  color: var(--ink-soft);
}

/* Mid-chapter scene breaks (e.g. a jump between the two threads) */
article h4 {
  font-family: var(--font-utility);
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border: 0;
  margin: 2.2em 0 1.4em;
}

article h4::before,
article h4::after {
  content: "❦";
  display: block;
  font-size: 1rem;
  color: var(--clay);
  margin-bottom: 0.35em;
}

/* Body copy: indent every paragraph, but not one that opens a
   heading's section — this reads like a printed novel. */
p {
  margin: 0;
  text-indent: 1.5em;
}

h1 + p,
h2 + p,
h3 + p,
h4 + p {
  text-indent: 0;
}

em {
  color: var(--ink-soft);
}

/* Verse / spirit-voice passages (e.g. Tashkilla's chant) */
.centred-content {
  margin: 2em 0;
  padding: 1.2em var(--gutter);
  background: var(--bone);
  border-radius: var(--radius);
  text-align: center;
}

.centred-content h3 {
  font-family: var(--font-display);
  font-style: italic;
}

.centred-content p {
  text-indent: 0;
  font-style: italic;
  color: var(--ink-soft);
}

/* -------------------------------------------------------------------------
   4. Header / footer
   ------------------------------------------------------------------------- */
header {
  position: relative;
  padding: 2rem var(--gutter) 1.5rem;
  text-align: center;
  background: var(--bone);
}

/* The twin-thread bar: clay meets flint, top of every page */
header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--clay) 50%, var(--flint) 50%);
}

header h1 {
  margin: 0.2em 0 0;
}

header p {
  margin: 0.3em 0 0;
  text-indent: 0;
  font-family: var(--font-utility);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

footer {
  margin-top: 3rem;
  padding: 1.5rem var(--gutter) 2rem;
  border-top: 1px solid var(--hairline);
  text-align: center;
}

footer h4 {
  font-family: var(--font-utility);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 0.4em;
}

footer p {
  text-indent: 0;
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin: 0;
}

/* -------------------------------------------------------------------------
   5. Navigation
   ------------------------------------------------------------------------- */
nav {
  max-width: var(--measure);
  margin: 2rem auto;
  padding: 0 var(--gutter);
}

nav h4 {
  font-family: var(--font-utility);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-align: left;
  margin: 0 0 0.6em;
}

/* Prev / Index / Next links on chapter pages */
nav p {
  text-indent: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4em 0.8em;
  font-family: var(--font-utility);
}

nav p a {
  text-decoration: none;
  padding: 0.4em 0.9em;
  background: var(--bone);
  border-radius: var(--radius);
  border: 1px solid var(--hairline);
}

nav p a:hover,
nav p a:focus-visible {
  border-color: var(--clay);
}

/* Full chapter index list (index.html) */
nav ul {
  list-style: none;
  margin: 0 0 1.2rem;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(11rem, 1fr));
  gap: 0.6rem;
}

nav ul a {
  display: block;
  text-decoration: none;
  padding: 0.6em 0.9em;
  background: var(--bone);
  border-left: 3px solid var(--clay);
  border-radius: var(--radius);
  color: var(--ink);
  font-family: var(--font-utility);
}

nav ul a:hover,
nav ul a:focus-visible {
  border-left-color: var(--flint);
  background: var(--parchment);
}

/* -------------------------------------------------------------------------
   6. Article & sections
   ------------------------------------------------------------------------- */
article {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 2rem var(--gutter) 0;
}

article > section + section {
  margin-top: 2.5rem;
}

/* -------------------------------------------------------------------------
   6a. Contact form
   ------------------------------------------------------------------------- */
main {
  max-width: var(--measure);
  margin: 2rem auto 3rem;
  padding: 0 var(--gutter);
}

main form {
  background: var(--bone);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 1.75rem var(--gutter);
}

main form p {
  text-indent: 0;
  margin: 0 0 1.2em;
}

main form p:last-child {
  margin-bottom: 0;
}

main form label {
  display: flex;
  flex-direction: column;
  gap: 0.4em;
  font-family: var(--font-utility);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
}

main form input[type="text"],
main form input[type="email"],
main form textarea {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--ink);
  background: var(--parchment);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 0.6em 0.8em;
}

main form textarea {
  resize: vertical;
  min-height: 8em;
}

main form input:focus-visible,
main form textarea:focus-visible {
  outline: none;
  border-color: var(--clay);
  box-shadow: 0 0 0 3px rgba(168, 88, 47, 0.15);
}

main form button[type="submit"] {
  font-family: var(--font-utility);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--bone);
  background: var(--clay);
  border: none;
  border-radius: var(--radius);
  padding: 0.7em 1.6em;
  cursor: pointer;
}

main form button[type="submit"]:hover,
main form button[type="submit"]:focus-visible {
  background: var(--flint);
}

/* -------------------------------------------------------------------------
   7. Responsive tweaks
   ------------------------------------------------------------------------- */
@media (max-width: 600px) {
  header {
    padding: 1.5rem 1rem 1.25rem;
  }

  nav p {
    justify-content: center;
  }

  nav ul {
    grid-template-columns: repeat(auto-fill, minmax(8.5rem, 1fr));
  }

  main form {
    padding: 1.25rem 1rem;
  }
}

@media (min-width: 900px) {
  article {
    padding-top: 3rem;
  }
}

/* -------------------------------------------------------------------------
   8. Accessibility
   ------------------------------------------------------------------------- */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--flint);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}