/*
Theme Name: andtopics PR Base
Theme URI: https://andtopics.jp
Description: andtopics PR distribution platform's base theme. Note-style minimalist design with serif headings + sans body. Article body wrapped in <article>; related releases as <aside> OUTSIDE article for clean extract_from_url behavior.
Author: andtopics
Version: 2.0.0
Text Domain: andtopics-pr-base
*/

/* ============================================================
   DESIGN TOKENS
   ============================================================ */
:root {
  /* Colors */
  --color-bg: #ffffff;
  --color-surface-soft: #fafafa;
  --color-text: #333333;
  --color-text-muted: #757575;
  --color-border: #eaeaea;
  --color-link-hover: #757575;
  --color-brand: #1a1a1a;
  --color-brand-soft: #f4f4f4;

  /* Typography */
  --font-serif: 'Noto Serif JP', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
  --font-sans: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', sans-serif;
  --font-en: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 80px;
  --space-10: 120px;

  /* Layout */
  --max-content: 680px;
  --max-wide: 1080px;
  --max-page: 1200px;

  /* Misc */
  --radius-sm: 4px;
  --transition: 0.2s ease;
}

/* RESET */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; font-size: 16px; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--color-text); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-link-hover); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.4;
  margin: 0;
}
p { margin: 0 0 1em; }

/* LAYOUT */
.site { display: flex; flex-direction: column; min-height: 100vh; }
.site-main { flex: 1; padding-bottom: var(--space-10); }
.container { max-width: var(--max-content); margin: 0 auto; padding: 0 var(--space-5); }
.container--wide { max-width: var(--max-wide); }

/* SITE HEADER */
.site-header { border-bottom: 1px solid var(--color-border); background: var(--color-bg); }
.site-header__inner {
  max-width: var(--max-page);
  margin: 0 auto;
  padding: var(--space-4) var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}
.site-logo a {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-en);
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--color-text);
}
.site-logo .custom-logo { max-height: 32px; width: auto; }
.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: var(--space-6); }
.site-nav a { font-size: 0.875rem; color: var(--color-text); font-weight: 500; }
.site-nav a:hover { color: var(--color-text-muted); }

/* POST (single.php) */
.pr-post { padding-top: var(--space-9); }
.pr-post__header { margin-bottom: var(--space-7); }
.pr-post__category {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}
.pr-post__category a { color: inherit; }
.pr-post__title {
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.5;
  margin: 0 0 var(--space-4);
}
.pr-post__meta { font-size: 0.875rem; color: var(--color-text-muted); }
.pr-post__thumb { margin: var(--space-7) 0; }
.pr-post__thumb img { width: 100%; border-radius: var(--radius-sm); }

/* Body content */
.pr-post__body { font-size: 1rem; line-height: 1.9; color: var(--color-text); }
.pr-post__body h2 { font-size: 1.2rem; font-weight: 700; border-left: 4px solid var(--color-brand); padding-left: 12px; margin: 2em 0 1em; }
.pr-post__body h3 { font-size: 1.05rem; font-weight: 700; margin: 1.5em 0 0.8em; }
.pr-post__body p { margin: 0 0 1.5em; }
.pr-post__body a {
  text-decoration: underline;
  text-decoration-color: var(--color-border);
  text-underline-offset: 3px;
}
.pr-post__body a:hover { text-decoration-color: var(--color-text); }
.pr-post__body img { margin: var(--space-6) 0; border-radius: var(--radius-sm); }
.pr-post__body figure img {
  max-width: 90%;
  max-height: 500px;
  width: auto;
  height: auto;
  margin: 0 auto;
  display: block;
}
@media (max-width: 768px) {
  .pr-post__body figure img { max-width: 100%; max-height: none; }
}
.pr-post__body figure { margin: var(--space-6) 0; }
.pr-post__body figure figcaption {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--space-2);
}
.pr-post__body blockquote {
  margin: var(--space-6) 0;
  padding-left: var(--space-5);
  border-left: 3px solid var(--color-text-muted);
  color: var(--color-text-muted);
  font-style: italic;
}
.pr-post__body ul, .pr-post__body ol { margin: 0 0 1.5em; padding-left: 1.5em; }
.pr-post__body li { margin-bottom: 0.5em; }
.pr-post__body hr { margin: var(--space-8) 0; border: none; border-top: 1px solid var(--color-border); }

/* RELATED (aside, OUTSIDE article) */
.pr-related {
  margin-top: var(--space-10);
  padding-top: var(--space-9);
  border-top: 1px solid var(--color-border);
}
.pr-related__inner { max-width: var(--max-wide); margin: 0 auto; padding: 0 var(--space-5); }
.pr-related__title { font-size: 1.25rem; font-weight: 700; text-align: center; margin: 0 0 var(--space-7); }
.pr-related__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }

/* CARD */
.pr-card { display: flex; flex-direction: column; color: var(--color-text); }
.pr-card__thumb {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: var(--color-brand-soft);
  margin-bottom: var(--space-4);
}
.pr-card__thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.pr-card:hover .pr-card__thumb img { transform: scale(1.03); }
.pr-card__category {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}
.pr-card__title { font-size: 1.0625rem; font-weight: 700; line-height: 1.5; margin: 0 0 var(--space-3); }
.pr-card__meta { font-size: 0.8125rem; color: var(--color-text-muted); margin-top: auto; }

/* ARCHIVE / INDEX */
.pr-archive { padding-top: var(--space-9); }
.pr-archive__header {
  text-align: center;
  margin-bottom: var(--space-9);
  padding-bottom: var(--space-7);
  border-bottom: 1px solid var(--color-border);
}
.pr-archive__title { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 700; margin: 0; }
.pr-archive__desc { font-size: 0.9375rem; color: var(--color-text-muted); margin-top: var(--space-3); font-family: var(--font-sans); }
.pr-archive__list { list-style: none; margin: 0; padding: 0; }
.pr-archive__item { border-bottom: 1px solid var(--color-border); }
.pr-archive__item:last-child { border-bottom: none; }
.pr-archive__entry { display: flex; gap: var(--space-5); padding: var(--space-5) 0; color: var(--color-text); }
.pr-archive__thumb {
  flex: 0 0 160px;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: var(--color-brand-soft);
}
.pr-archive__thumb img { width: 100%; height: 100%; object-fit: cover; }
.pr-archive__body { flex: 1; display: flex; flex-direction: column; justify-content: center; }
.pr-archive__category {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}
.pr-archive__h { font-size: 1.125rem; font-weight: 700; margin: 0 0 var(--space-2); line-height: 1.5; }
.pr-archive__excerpt { font-size: 0.875rem; color: var(--color-text-muted); line-height: 1.6; margin: 0; font-family: var(--font-sans); }
.pr-archive__date { font-size: 0.8125rem; color: var(--color-text-muted); margin-top: var(--space-2); }

/* PAGINATION */
.pagination { margin: var(--space-9) 0 0; display: flex; justify-content: center; gap: var(--space-3); flex-wrap: wrap; }
.pagination .page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 var(--space-3);
  font-size: 0.875rem;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  background: var(--color-surface-soft);
  transition: background var(--transition);
  font-family: var(--font-en);
}
.pagination .page-numbers:hover { background: var(--color-border); }
.pagination .page-numbers.current { background: var(--color-text); color: var(--color-bg); }

/* 404 */
.pr-404 { text-align: center; padding: var(--space-10) var(--space-5); }
.pr-404__code { font-size: 4rem; font-weight: 700; color: var(--color-text-muted); margin: 0; font-family: var(--font-sans); }
.pr-404__title { font-size: 1.5rem; font-weight: 700; margin: var(--space-4) 0 var(--space-3); }
.pr-404__desc { color: var(--color-text-muted); margin: 0 0 var(--space-6); }
.pr-404__back {
  display: inline-block;
  padding: var(--space-3) var(--space-5);
  background: var(--color-text);
  color: var(--color-bg);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
}
.pr-404__back:hover { background: var(--color-text-muted); color: var(--color-bg); }

/* FOOTER */
.site-footer { border-top: 1px solid var(--color-border); padding: var(--space-7) 0; }
.site-footer__inner {
  max-width: var(--max-page);
  margin: 0 auto;
  padding: 0 var(--space-5);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-3);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}
.site-footer__copyright { margin: 0; }
.site-footer__nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: var(--space-5); }
.site-footer__nav a { color: var(--color-text-muted); }
.site-footer__nav a:hover { color: var(--color-text); }

/* RESPONSIVE */
@media (max-width: 768px) {
  .pr-related__grid { grid-template-columns: 1fr; gap: var(--space-5); }
  .site-nav ul { gap: var(--space-4); }
  .site-nav a { font-size: 0.8125rem; }
  .pr-post__title { font-size: 1.625rem; }
  .pr-post { padding-top: var(--space-7); }
  .pr-archive { padding-top: var(--space-7); }
}
@media (max-width: 600px) {
  .pr-archive__entry { flex-direction: column; gap: var(--space-3); }
  .pr-archive__thumb { flex: 0 0 auto; width: 100%; aspect-ratio: 16 / 10; }
}