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

:root {
  --ink:     #1a1a1a;
  --ink2:    #555;
  --ink3:    #888;
  --bg:      #faf9f6;
  --bg2:     #f2f0eb;
  --bg3:     #e8e5de;
  --accent:  #2a4f8a;
  --accent2: #e8eef8;
  --border:  #ddd9d0;
  --pulse:   #d64e2e;
  --font-display: 'DM Serif Display', serif;
  --font-body:    'Inter', sans-serif;
  --font-mono:    'DM Mono', monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink:     #e8e5de;
    --ink2:    #a8a298;
    --ink3:    #6a6560;
    --bg:      #18171a;
    --bg2:     #222028;
    --bg3:     #2c2a34;
    --accent:  #6b93d4;
    --accent2: #1c2640;
    --border:  #2e2c35;
    --pulse:   #e06040;
  }
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  font-size: 15px;
  line-height: 1.65;
}

/* ── Topnav ── */
.topnav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.topnav-inner {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-display);
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--ink);
  line-height: 1.1;
}

.brand-alias {
  font-size: 11px;
  color: var(--ink3);
  font-style: italic;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  flex-wrap: wrap;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 0.35rem 0.65rem;
  border-radius: 7px;
  font-size: 13.5px;
  color: var(--ink2);
  text-decoration: none;
  transition: background 0.12s, color 0.12s;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--bg2);
  color: var(--ink);
}

.nav-sep {
  width: 1px;
  height: 18px;
  background: var(--border);
  margin: 0 0.25rem;
}

/* ── Page hero ── */
.page-hero {
  max-width: 860px;
  margin: 0 auto;
  padding: 4rem 2rem 3rem;
  border-bottom: 1px solid var(--border);
}

.page-hero-eyebrow {
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink3);
  margin-bottom: 0.65rem;
}

.page-hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.page-hero-body {
  font-size: 15px;
  color: var(--ink2);
  max-width: 520px;
  line-height: 1.7;
  margin-bottom: 1.75rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.55rem 1.2rem;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: opacity 0.12s;
}
.btn-primary:hover { opacity: 0.88; }

/* ── FAQ / index page ── */
.faq-section {
  max-width: 680px;
  margin: 0 auto;
  padding: 3rem 2rem 2rem;
}

.section-heading {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin-bottom: 1.5rem;
}

.faq-list { display: flex; flex-direction: column; }

.faq-item {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 0 1.25rem;
  padding: 1.1rem 0;
  border-top: 1px solid var(--border);
}
.faq-item:last-child { border-bottom: 1px solid var(--border); }

.faq-q {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink3);
  padding-top: 3px;
}

.faq-a { font-size: 14.5px; color: var(--ink2); line-height: 1.7; }
.faq-a p { margin-bottom: 0.6rem; }
.faq-a p:last-child { margin-bottom: 0; }
.faq-a a { color: var(--accent); text-decoration: none; }
.faq-a a:hover { text-decoration: underline; }
.faq-a em { font-style: italic; }

/* ── Author card ── */
.author-section {
  max-width: 680px;
  margin: 2rem auto 0;
  padding: 0 2rem 3rem;
}

.author-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.4rem 1.75rem;
  margin-bottom: 1.5rem;
}

.author-label {
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink3);
  margin-bottom: 0.5rem;
}

.author-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--ink);
  margin-bottom: 0.3rem;
}

.author-meta {
  font-size: 13px;
  color: var(--ink3);
  margin-bottom: 0.75rem;
}

.author-links a {
  font-size: 13.5px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}
.author-links a:hover { text-decoration: underline; }

.copyright-note {
  font-size: 12.5px;
  color: var(--ink3);
  line-height: 1.65;
}
.copyright-note em { font-style: italic; }

/* ── Errors list page ── */
.list-wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 2.5rem 2rem 4rem;
}

.alpha-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem;
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.alpha-nav a,
.alpha-nav span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  text-decoration: none;
  transition: background 0.1s, color 0.1s;
}

.alpha-nav a { color: var(--accent); }
.alpha-nav a:hover { background: var(--bg2); }
.alpha-nav span { color: var(--border); }

.letter-section { margin-bottom: 2.5rem; scroll-margin-top: 70px; }

.letter-heading {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--ink);
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.error-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(188px, 1fr));
  gap: 0.05rem 1.25rem;
}

.error-grid a {
  font-size: 13.5px;
  color: var(--accent);
  text-decoration: none;
  padding: 0.22rem 0;
  line-height: 1.5;
  display: block;
}
.error-grid a:hover { text-decoration: underline; }

.suppl-section {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.suppl-section h2 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 400;
  margin-bottom: 1.25rem;
  color: var(--ink);
}

.suppl-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

.suppl-list li {}

.suppl-list > li > a {
  font-size: 14.5px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}
.suppl-list > li > a:hover { text-decoration: underline; }

.suppl-desc {
  font-size: 13px;
  color: var(--ink3);
  margin-top: 0.2rem;
}

.suppl-sub {
  margin-top: 0.4rem;
  font-size: 12.5px;
  color: var(--ink3);
  line-height: 1.9;
}
.suppl-sub a { color: var(--ink3); text-decoration: none; }
.suppl-sub a:hover { color: var(--accent); text-decoration: underline; }

/* ── Individual error page ── */
.page-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 2rem 4rem;
}

/* Header table: donkey.gif + H1 */
.page-content table {
  display: block;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
}
.page-content table tbody,
.page-content table tr {
  display: flex;
  width: 100%;
  align-items: center;
  gap: 1.25rem;
}
.page-content table td { display: block; }
.page-content table td:first-child { flex-shrink: 0; }
.page-content table td:last-child { flex: 1; min-width: 0; }

.page-content table td img {
  display: block;
  max-width: 96px;
  height: auto;
  border-radius: 4px;
}

.page-content h1 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  font-weight: 400;
  letter-spacing: 0.01em;
  color: var(--ink);
  line-height: 1.15;
  margin: 0;
}

/* Hide decorative separators; rule.gif needs explicit selector because it sits inside <p> */
.page-content > img,
.page-content img[src="rule.gif"],
.page-content img[src="pencil.gif"] { display: none; }

/* redpencil.gif is the wrong-form correction marker — keep it visible, just responsive */
.page-content img[src="redpencil.gif"] {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-content p {
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink2);
  margin-bottom: 1.2rem;
}

.page-content p strong,
.page-content p b { color: var(--ink); font-weight: 600; }
.page-content p em,
.page-content p i { font-style: italic; }

.page-content a { color: var(--accent); text-decoration: none; }
.page-content a:hover { text-decoration: underline; }

/* Back-to-list link */
.page-content a[href^="errors.html"] {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 2rem;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink3);
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--bg2);
  transition: background 0.12s, color 0.12s;
  text-decoration: none;
}
.page-content a[href^="errors.html"]:hover {
  background: var(--bg3);
  color: var(--ink);
  text-decoration: none;
}

.page-content blockquote {
  margin: 1rem 0 1rem 1.5rem;
  padding-left: 1rem;
  border-left: 2px solid var(--border);
  color: var(--ink2);
  font-size: 15px;
}

.page-content ul,
.page-content ol { margin: 0.75rem 0 1rem 1.5rem; }

.page-content li {
  margin-bottom: 0.35rem;
  font-size: 15px;
  color: var(--ink2);
  line-height: 1.65;
}

.page-content h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--ink);
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.page-content h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--ink);
  margin: 1.5rem 0 0.5rem;
}

.page-content h6 {
  font-size: 12.5px;
  color: var(--ink3);
  font-weight: 400;
  line-height: 1.65;
  margin-top: 1rem;
}

/* ── Footer ── */
.page-footer {
  border-top: 1px solid var(--border);
  max-width: 860px;
  margin: 0 auto;
  padding: 1.5rem 2rem 2.5rem;
  font-size: 12px;
  color: var(--ink3);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.page-footer a { color: var(--ink3); text-decoration: none; }
.page-footer a:hover { color: var(--accent); }

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--pulse);
  flex-shrink: 0;
  animation: pulse 2.2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(0.8); }
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .topnav-inner {
    height: auto;
    padding: 0.75rem 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  .nav-links { gap: 0.1rem; }
  .nav-links a { font-size: 12.5px; padding: 0.3rem 0.5rem; }
  .nav-sep { display: none; }
  .page-hero { padding: 2.5rem 1rem 2rem; }
  .faq-section { padding: 2rem 1rem; }
  .faq-item { grid-template-columns: 44px 1fr; }
  .author-section { padding: 0 1rem 2.5rem; }
  .list-wrap { padding: 1.5rem 1rem 3rem; }
  .error-grid { grid-template-columns: repeat(auto-fill, minmax(148px, 1fr)); }
  .page-content { padding: 2rem 1rem 3rem; }
  .page-content table tbody,
  .page-content table tr { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
  .page-content table td img { max-width: 56px; }
  .page-content h1 { font-size: 1.5rem; }
  .page-footer { padding: 1.5rem 1rem 2rem; }
}