/*
Theme Name: JPM Books
Theme URI: https://books.jpm.li
Author: Johann Peter Murmann
Author URI: https://professor-murmann.net
Description: A lightweight, secure, dependency-free WordPress theme for presenting an author's books. Built to replace an outdated commerce theme and the vulnerable Slider Revolution plugin. Registers a "Book" content type and provides home, book listing, single book, about and contact templates with built-in server-side form handling. Information-only (no shopping cart).
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: jpm-books
*/

/* ===========================================================
   Design tokens
   =========================================================== */
:root {
  --color-bg: #ffffff;
  --color-surface: #f7f6f3;
  --color-text: #1d1d1f;
  --color-muted: #6b6b70;
  --color-accent: #6b4226;        /* warm brown nod to the original */
  --color-accent-dark: #4f2f1a;
  --color-border: #e6e3dd;
  --max-width: 1140px;
  --radius: 10px;
  --shadow: 0 6px 24px rgba(0,0,0,0.08);
  --font-serif: Georgia, "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* ===========================================================
   Reset / base
   =========================================================== */
*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { font-family: var(--font-serif); line-height: 1.2; color: var(--color-text); }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
.section { padding: 64px 0; }
.section--surface { background: var(--color-surface); }
.text-center { text-align: center; }
.eyebrow { text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.8rem; color: var(--color-accent); font-weight: 600; }

/* ===========================================================
   Buttons
   =========================================================== */
.btn {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-weight: 600;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.18s ease;
}
.btn:hover { background: var(--color-accent-dark); text-decoration: none; color: #fff; }
.btn--ghost { background: transparent; color: var(--color-accent); border: 1px solid var(--color-accent); }
.btn--ghost:hover { background: var(--color-accent); color: #fff; }

/* ===========================================================
   Header / nav
   =========================================================== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.96);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.site-header__inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; max-width: var(--max-width); margin: 0 auto; }
.site-logo img { max-height: 52px; width: auto; }
.site-logo .site-title-text { font-family: var(--font-serif); font-size: 1.3rem; font-weight: 700; color: var(--color-text); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--color-text); margin: 5px 0; transition: 0.2s; }
.main-nav ul { list-style: none; display: flex; gap: 26px; margin: 0; padding: 0; align-items: center; }
.main-nav a { color: var(--color-text); font-weight: 500; font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.04em; }
.main-nav a:hover { color: var(--color-accent); text-decoration: none; }
.main-nav .menu-item-cta a { background: var(--color-accent); color: #fff; padding: 9px 16px; border-radius: var(--radius); }
.main-nav .menu-item-cta a:hover { background: var(--color-accent-dark); }

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .main-nav { position: absolute; top: 100%; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--color-border); max-height: 0; overflow: hidden; transition: max-height 0.25s ease; }
  .main-nav.open { max-height: 520px; }
  .main-nav ul { flex-direction: column; align-items: stretch; gap: 0; padding: 8px 20px 16px; }
  .main-nav li { padding: 10px 0; border-bottom: 1px solid var(--color-border); }
  .main-nav .menu-item-cta a { display: inline-block; }
}

/* ===========================================================
   Hero
   =========================================================== */
.hero { background: var(--color-surface); padding: 72px 0; text-align: center; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.2rem); margin: 0 0 14px; }
.hero p { font-size: 1.2rem; color: var(--color-muted); max-width: 640px; margin: 0 auto 28px; }

/* ===========================================================
   Book grid
   =========================================================== */
.book-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 36px; }
.book-card { text-align: center; }
.book-card__cover { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); transition: transform 0.18s ease; }
.book-card a:hover .book-card__cover { transform: translateY(-4px); }
.book-card__cover img { margin: 0 auto; border-radius: 4px; }
.book-card__title { font-family: var(--font-serif); font-size: 1.05rem; margin: 16px 0 6px; color: var(--color-text); }
.book-card__meta { color: var(--color-accent); font-weight: 600; font-size: 0.92rem; }
.book-card a { text-decoration: none; }
.book-card a:hover .book-card__title { color: var(--color-accent); }

/* ===========================================================
   Stats counter
   =========================================================== */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stats__num { font-family: var(--font-serif); font-size: 2.6rem; font-weight: 700; color: var(--color-accent); }
.stats__label { text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.82rem; color: var(--color-muted); }
@media (max-width: 680px) { .stats { grid-template-columns: repeat(2, 1fr); gap: 32px; } }

/* ===========================================================
   Single book
   =========================================================== */
.book-single { display: grid; grid-template-columns: 320px 1fr; gap: 48px; align-items: start; }
.book-single__cover { position: sticky; top: 100px; }
.book-single__cover img { border-radius: var(--radius); box-shadow: var(--shadow); margin: 0 auto; }
.book-single__purchase { margin-top: 20px; display: flex; flex-direction: column; gap: 10px; }
.book-single h1 { font-size: 2.2rem; margin: 0 0 6px; }
.book-single .subtitle { font-size: 1.25rem; color: var(--color-muted); margin: 0 0 14px; font-family: var(--font-serif); font-style: italic; }
.book-single .authors { font-weight: 600; margin: 0 0 10px; }
.book-single .availability { display: inline-block; background: var(--color-surface); color: var(--color-accent); font-weight: 600; padding: 6px 14px; border-radius: var(--radius); margin-bottom: 20px; }
.book-content { font-size: 1.04rem; }
.book-content h2, .book-content h3 { margin-top: 1.6em; }
@media (max-width: 760px) {
  .book-single { grid-template-columns: 1fr; gap: 28px; }
  .book-single__cover { position: static; max-width: 260px; margin: 0 auto; }
}

/* ===========================================================
   About page
   =========================================================== */
.about-hero { display: grid; grid-template-columns: 280px 1fr; gap: 40px; align-items: center; }
.about-hero img { border-radius: var(--radius); box-shadow: var(--shadow); }
.logos { display: flex; flex-wrap: wrap; gap: 30px; align-items: center; margin-top: 24px; }
.logos img { max-height: 56px; width: auto; filter: grayscale(100%); opacity: 0.8; }
blockquote.review { border-left: 4px solid var(--color-accent); margin: 0 0 28px; padding: 6px 0 6px 22px; font-style: italic; color: #333; }
blockquote.review cite { display: block; margin-top: 10px; font-style: normal; font-weight: 600; color: var(--color-muted); font-size: 0.92rem; }
@media (max-width: 680px) { .about-hero { grid-template-columns: 1fr; text-align: center; } .about-hero img { max-width: 240px; margin: 0 auto; } }

/* ===========================================================
   Forms
   =========================================================== */
.form-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 32px; max-width: 620px; margin: 0 auto; }
.form-row { margin-bottom: 18px; }
.form-row label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 0.95rem; }
.form-row input, .form-row textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--color-border);
  border-radius: 8px; font-size: 1rem; font-family: inherit; background: #fff;
}
.form-row input:focus, .form-row textarea:focus { outline: 2px solid var(--color-accent); border-color: var(--color-accent); }
.form-notice { padding: 14px 18px; border-radius: 8px; margin-bottom: 22px; font-weight: 500; }
.form-notice--success { background: #e7f4e8; color: #1e5128; border: 1px solid #bcdfc0; }
.form-notice--error { background: #fbeaea; color: #842029; border: 1px solid #f1c2c2; }
.hp-field { position: absolute; left: -9999px; top: -9999px; }

/* Mailing list inline form */
.subscribe-form { display: flex; gap: 12px; max-width: 520px; margin: 22px auto 0; }
.subscribe-form input { flex: 1; padding: 13px 16px; border: 1px solid var(--color-border); border-radius: var(--radius); font-size: 1rem; }
@media (max-width: 520px) { .subscribe-form { flex-direction: column; } }

/* ===========================================================
   Footer
   =========================================================== */
.site-footer { background: #2a2320; color: #d8d2cc; padding: 48px 0 28px; margin-top: 0; }
.site-footer a { color: #e8c9a8; }
.site-footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 24px; align-items: center; }
.social-links { display: flex; gap: 16px; list-style: none; padding: 0; margin: 0; }
.social-links a { display: inline-flex; width: 38px; height: 38px; align-items: center; justify-content: center; border: 1px solid #4a3f39; border-radius: 50%; }
.social-links a:hover { background: var(--color-accent); border-color: var(--color-accent); text-decoration: none; }
.social-links svg { width: 18px; height: 18px; fill: currentColor; }
.copyright { font-size: 0.88rem; color: #b3aaa3; }

/* ===========================================================
   Misc / WP core
   =========================================================== */
.page-content { font-size: 1.05rem; }
.aligncenter { margin: 0 auto; }
.screen-reader-text { position: absolute; clip: rect(1px,1px,1px,1px); width: 1px; height: 1px; overflow: hidden; }
.entry-title { margin-bottom: 24px; }