/* ============================================================================
   Reading preferences — text size, font and theme for books/ and unwind/.
   Set by reading-prefs.js on <html> (data-font, data-theme, --read-size) and
   read by each reading stylesheet through these tokens:
     --read-root   root font size (the chosen size, scaled per font)
     --font-text   the reading typeface; italics use font-style: italic
     --bg --surface --border --text --dim --accent …  (the Unwind palette)
   =========================================================================== */

@font-face {
  font-family: "Reading Mono";
  src: url("fonts/Quattro.woff") format("woff");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Reading Mono";
  src: url("fonts/Quattro-Bold.woff") format("woff");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Reading Mono";
  src: url("fonts/Quattro-Italic.woff") format("woff");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "Reading Serif";
  src: url("fonts/Erode.ttf") format("truetype");
  font-weight: 300 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Reading Serif";
  src: url("fonts/Erode-Italic.ttf") format("truetype");
  font-weight: 300 700;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "Reading Sans";
  src: url("fonts/GeistVariableVF.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --read-size: 18px;
  --read-scale: 1;
  --read-root: calc(var(--read-size) * var(--read-scale));   /* use this as the root font size */
  --font-text: "Reading Mono", "iA Writer Quattro", ui-monospace, Menlo, monospace;
}
/* Erode sets smaller than Quattro at the same size; scale it up to match. */
:root[data-font="serif"] { --font-text: "Reading Serif", Georgia, "Times New Roman", serif; --read-scale: 1.1; }
:root[data-font="sans"] { --font-text: "Reading Sans", system-ui, -apple-system, sans-serif; }

/* Themes. Auto (no attribute) follows the device. */
:root[data-theme="light"] {
  color-scheme: light;
  --black-rgb: 17, 17, 17;
  --gold-rgb: 112, 84, 28;
  --bg: #ffffff;
  --surface: #f5f5f5;
  --border: rgba(var(--black-rgb), 0.16);
  --green: #2b7a55;
  --red: #b24a3b;
}
:root[data-theme="sepia"] {
  color-scheme: light;
  --black-rgb: 59, 45, 28;
  --gold-rgb: 128, 82, 20;
  --bg: #f4ecd8;
  --surface: #ebe0c6;
  --border: rgba(var(--black-rgb), 0.18);
  --green: #3f6f45;
  --red: #a4472f;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --black-rgb: 248, 245, 239;
  --gold-rgb: 196, 169, 110;
  --bg: #0e0d0b;
  --surface: #161510;
  --border: rgba(var(--black-rgb), 0.18);
  --green: #7ab090;
  --red: #c07060;
}
/* Derived colours re-resolve against the theme's base values. */
:root[data-theme] {
  --text: rgb(var(--black-rgb));
  --dim: rgba(var(--black-rgb), 0.7);
  --accent: rgb(var(--gold-rgb));
  --accent-dim: rgba(var(--gold-rgb), 0.6);
  --accent-faint: rgba(var(--gold-rgb), 0.37);
  --section-accent: rgba(var(--gold-rgb), 0.37);
  --quote-text: rgba(var(--black-rgb), 0.88);
}

/* ---- Controls (reading-prefs.js) ---------------------------------------- */
.reading-prefs {
  display: grid;
  gap: 16px;
  font-size: 13px;          /* controls, not text: fixed sizes so they don't grow with the reading size */
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
}
.rp-row {
  display: grid;
  grid-template-columns: 64px 1fr;
  align-items: center;
  gap: 12px;
}
.rp-options { display: flex; flex-wrap: wrap; gap: 6px; }
.rp-options button {
  min-width: 42px;
  height: 40px;
  padding: 0 10px;
  font-family: inherit;
  border: 1px solid var(--border);
  border-radius: 0;
  background: transparent;
  color: var(--text);
  font-size: 15px;
  letter-spacing: 0;
  text-transform: none;
  cursor: pointer;
}
.rp-options button[data-font="mono"] { font-family: "Reading Mono", monospace; }
.rp-options button[data-font="serif"] { font-family: "Reading Serif", serif; font-size: 17px; }
.rp-options button[data-font="sans"] { font-family: "Reading Sans", sans-serif; }
.rp-options button[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--bg);
}
@media (hover: hover) {
  .rp-options button:hover { border-color: var(--accent); }
}
.rp-options button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* The "Aa" button and its sheet, for pages without their own (Unwind). */
.rp-toggle {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  letter-spacing: 0.06em;
  text-transform: none;
  cursor: pointer;
}
.rp-sheet {
  position: fixed;
  inset: auto 0 0 0;
  width: 100%;
  max-width: 680px;
  max-height: 85vh;
  overflow: auto;
  margin: 0 auto;
  padding: 1.25rem 1.5rem 1.75rem;
  border: 0;
  border-top: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-text);
}
.rp-sheet::backdrop { background: rgba(var(--black-rgb), 0.18); }
@media (max-width: 640px) {
  .rp-sheet { padding-left: 1.15rem; padding-right: 1.15rem; }
  .rp-row { grid-template-columns: 56px 1fr; }
}
.rp-sheet[open] { animation: rp-rise 220ms ease; }
@keyframes rp-rise { from { transform: translateY(1.5rem); opacity: 0; } }
@media (prefers-reduced-motion: reduce) {
  .rp-sheet[open] { animation: none; }
}
.rp-options button:disabled { opacity: 0.35; cursor: default; }