*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── THEME D: PAPER ── */

/* Dark mode (default) — dark slate gray */
:root {
  --bg:       #1e2028;
  --title:    #e0e0e6;
  --cream:    #d0d0d6;
  --cream2:   #9a9aa0;
  --gold:     #7ab0a8;
  --gold-dim: #2a2c32;
  --silver:   #8a8a90;
  --subtitle: #9a9aa0;
  --link:     #7ab0a8;
  --line:     #28282e;
  --line2:    #32323a;
  --card-bg:  rgba(255,255,255,0.02);
}

/* Light mode — warm paper */
[data-theme="light"] {
  --bg:       #ededf0;
  --title:    #1a1a1e;
  --cream:    #2a2a2e;
  --cream2:   #5a5a5e;
  --gold:     #4a7a72;
  --gold-dim: #d8dcd8;
  --silver:   #6a6a6e;
  --subtitle: #5a5a5e;
  --link:     #4a7a72;
  --line:     #dcd8d4;
  --line2:    #ccc8c4;
  --card-bg:  rgba(0,0,0,0.02);
}

html { scroll-behavior: smooth; }

body {
  background-color: var(--bg);
  color: var(--cream);
  font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, 'Source Serif Pro', Georgia, serif;
  font-size: 19px;
  line-height: 1.65;
  transition: background-color 0.4s ease, color 0.4s ease;
}

a { color: var(--link); text-decoration: none; transition: opacity 0.2s; }
a:hover { opacity: 0.8; }

.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ── THEME TOGGLE ── */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--silver);
  background: none;
  border: none;
  cursor: pointer;
  z-index: 100;
  opacity: 0.5;
  transition: opacity 0.2s;
}
.theme-toggle:hover { opacity: 1; color: var(--link); }

/* ── BACK LINK ── */
.back-link {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--silver);
  padding: 28px 0 0;
}
.back-link:hover { color: var(--link); }

/* ── ARTICLE ── */
article { padding: 80px 0 120px; }

.article-meta {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--silver);
  text-transform: uppercase;
  margin-bottom: 20px;
}

.article-title {
  font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, 'Source Serif Pro', Georgia, serif;
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--title);
  margin-bottom: 36px;
}

.article-body {
  font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, 'Source Serif Pro', Georgia, serif;
  font-size: clamp(18px, 1.8vw, 20px);
  font-weight: normal;
  line-height: 1.7;
  color: var(--cream);
}

.article-body p { margin-bottom: 1.4em; }

.article-body h2 {
  font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, 'Source Serif Pro', Georgia, serif;
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  color: var(--title);
  margin-top: 2.4em;
  margin-bottom: 0.8em;
  line-height: 1.15;
}

.article-body em { font-style: italic; color: var(--title); }
.article-body strong { font-weight: 600; color: var(--title); }

.article-body .highlight {
  font-style: italic;
  font-size: clamp(20px, 2.2vw, 24px);
  color: var(--gold);
  display: block;
  margin: 1.8em 0;
  line-height: 1.55;
}

.article-body ol, .article-body ul {
  padding-left: 1.2em;
  margin-bottom: 1.4em;
}

.article-body ol li, .article-body ul li { margin-bottom: 0.5em; }

.article-body .consequences { margin: 1.4em 0; }

.article-body .consequences p {
  margin-bottom: 1em;
  padding-left: 1.2em;
  border-left: 2px solid var(--gold-dim);
}

.divider {
  border: none;
  border-top: 1px solid var(--line2);
  margin: 2em 0;
}

.endnote {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--silver);
  font-style: italic;
  margin-top: 3em;
  padding-top: 2em;
  border-top: 1px solid var(--line2);
}

/* ── BLOG INDEX ── */
.blog-header {
  padding: 80px 0 48px;
  border-bottom: 1px solid var(--line2);
}

.blog-header h1 {
  font-family: 'Gloock', serif;
  font-size: clamp(36px, 6vw, 52px);
  font-weight: 400;
  line-height: 1.05;
  color: var(--title);
  margin-bottom: 16px;
}

.blog-header p {
  font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, 'Source Serif Pro', Georgia, serif;
  font-size: clamp(17px, 1.8vw, 20px);
  line-height: 1.6;
  color: var(--cream2);
  max-width: 48ch;
}

.post-list { padding: 8px 0 80px; }

.post-entry {
  padding: 14px 0;
  border-bottom: none;
}

.post-entry:first-child { padding-top: 0; }

.post-meta {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--silver);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.post-title {
  font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, 'Source Serif Pro', Georgia, serif;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 2px;
}

.post-title a { color: var(--title); }
.post-title a:hover { color: var(--link); }

.post-excerpt {
  font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, 'Source Serif Pro', Georgia, serif;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.65;
  color: var(--cream2);
  max-width: 56ch;
}

/* ── SERIES NAV ── */
.series-nav {
  margin-top: 60px;
  padding-top: 32px;
  border-top: 1px solid var(--line2);
}

.series-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--silver);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.series-list { list-style: none; padding: 0; }

.series-list li {
  padding: 8px 0;
  font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, 'Source Serif Pro', Georgia, serif;
  font-size: 17px;
  color: var(--cream2);
}

.series-list li a { color: var(--cream2); }
.series-list li a:hover { color: var(--link); }

.series-list li.current {
  color: var(--title);
  font-weight: 600;
}

.series-list li.current::before {
  content: "\2192\00a0";
  color: var(--gold);
}

.series-list li.upcoming { opacity: 0.4; }

/* ── FOOTER ── */
footer {
  padding: 40px 0 48px;
}

.footer-link {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--silver);
  opacity: 0.4;
}
.footer-link:hover { opacity: 0.7; }