/* Second Order Effects — base styles */

@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:ital,opsz,wght@0,8..60,400;0,8..60,500;0,8..60,600;0,8..60,700;1,8..60,400&family=Inter:wght@400;500;600&display=swap');

:root {
  --paper: #faf7f2;
  --ink: #1c1a17;
  --ink-soft: #524d45;
  --rule: #ded6c8;
  --accent: #9a3324;
  --accent-soft: #b9541a;
  --max-width: 700px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Source Serif 4', Georgia, serif;
  line-height: 1.65;
  font-size: 19px;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(154, 51, 36, 0.35);
  transition: border-bottom-color 0.2s ease, color 0.2s ease, opacity 0.2s ease;
}

a:hover { border-bottom-color: var(--accent); }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

main .wrap {
  background: transparent;
  border: none;
  border-radius: 0;
  box-shadow: none;
  padding: 0;
}

/* Header */
header.site-header {
  border-top: 3px solid var(--accent);
  border-bottom: 1px solid rgba(222, 214, 200, 0.85);
  padding: 40px 0 24px;
  background: transparent;
}

.site-header .wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
}

.site-title {
  font-family: 'Source Serif 4', Georgia, serif;
  font-weight: 700;
  font-size: 36px;
  letter-spacing: -0.02em;
  color: var(--ink);
  border-bottom: none;
  transition: opacity 0.2s ease;
  margin-bottom: 10px;
}

.site-title:hover { opacity: 0.8; }

nav.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

nav.site-nav a {
  color: var(--ink-soft);
  margin: 0;
  padding-bottom: 4px;
  border-bottom: none;
  transition: color 0.25s ease;
}

nav.site-nav a:not(:last-child)::after {
  content: '|';
  margin-left: 18px;
  color: var(--ink-soft);
}

nav.site-nav a:hover { color: var(--accent); }

.tagline {
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  color: var(--ink-soft);
  margin-top: 0;
  letter-spacing: 0.01em;
  max-width: 640px;
}

/* Main content */
main { padding: 52px 0 84px; }

.intro {
  font-size: 20px;
  color: var(--ink-soft);
  margin-bottom: 52px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--rule);
}

.intro em { font-style: italic; color: var(--ink); }

/* Article list on homepage */
.post-list { list-style: none; margin: 0; padding: 0; }

.post-item {
  padding: 28px 0;
  border-bottom: 1px solid var(--rule);
  border-left: 2px solid transparent;
  transition: padding-left 0.25s ease, border-left-color 0.25s ease;
}

.post-item:hover {
  padding-left: 14px;
  border-left-color: var(--accent);
}

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

.post-date {
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-soft);
  margin-bottom: 8px;
  display: block;
}

.post-title {
  font-size: 27px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  line-height: 1.3;
}

.post-title a { border-bottom: none; color: var(--ink); transition: color 0.2s ease; }
.post-title a:hover { color: var(--accent); }

.post-dek {
  color: var(--ink-soft);
  font-size: 17px;
  margin: 0;
}

/* Article page */
article.post {
  max-width: var(--max-width);
}

article.post .post-date { margin-bottom: 16px; }

article.post h1 {
  font-size: 42px;
  line-height: 1.15;
  margin: 0 0 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

article.post .post-dek {
  font-size: 21px;
  font-style: italic;
  color: var(--ink-soft);
  margin-bottom: 36px;
}

article.post p { margin: 0 0 22px; }

article.post h2 {
  font-size: 26px;
  margin: 44px 0 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

article.post blockquote {
  margin: 32px 0;
  padding-left: 20px;
  border-left: 3px solid var(--accent);
  color: var(--ink-soft);
  font-style: italic;
  font-size: 20px;
}

/* Charts */
figure.chart {
  margin: 40px 0;
  padding: 20px 20px 16px;
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 6px;
}

figure.chart img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 2px;
}

figure.chart figcaption {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  font-family: 'Inter', sans-serif;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--ink-soft);
}

figure.chart figcaption strong {
  color: var(--ink);
}

@media (max-width: 600px) {
  figure.chart { padding: 14px 14px 12px; margin: 32px -6px; }
}

.sources {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  color: var(--ink-soft);
}

.sources h3 {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin: 0 0 10px;
}

.sources ul { margin: 0; padding-left: 18px; }
.sources li { margin-bottom: 6px; }

.post-nav {
  margin-top: 48px;
  font-family: 'Inter', sans-serif;
  font-size: 14px;
}

/* Comments (giscus) */
.comments {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
}

.comments h3 {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin: 0 0 20px;
}

/* About page */
.about-photo-placeholder {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: var(--rule);
  margin-bottom: 24px;
}

.placeholder {
  background: #fff3cd;
  border: 1px dashed #c9a227;
  padding: 2px 6px;
  border-radius: 3px;
  font-family: 'Inter', sans-serif;
  font-size: 0.85em;
}

/* Contact form */
.form-row {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
}

.form-row label {
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.form-row input,
.form-row textarea {
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: 17px;
  padding: 10px 12px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: #fff;
  color: var(--ink);
}

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--accent);
}

button[type="submit"] {
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  font-weight: 600;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 12px 28px;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.15s ease;
}

button[type="submit"]:hover { background: var(--accent-soft); transform: translateY(-1px); }
button[type="submit"]:active { transform: translateY(0); }

.form-status {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  margin-top: 14px;
}

.form-status-ok { color: #1a7a3c; }
.form-status-error { color: var(--accent); }

/* Footer */
footer.site-footer {
  border-top: 1px solid var(--rule);
  padding: 32px 0;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  color: var(--ink-soft);
}

@media (max-width: 600px) {
  body { font-size: 17px; }
  article.post h1 { font-size: 30px; }
  .post-title { font-size: 22px; }
  .site-title { font-size: 28px; }
  header.site-header {
    padding: 32px 0 20px;
  }
  .site-header .wrap {
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    justify-items: center;
    align-items: center;
    gap: 10px;
  }
  nav.site-nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: 18px;
    grid-column: 1;
  }
  nav.site-nav a {
    padding-bottom: 4px;
  }
  main .wrap {
    padding: 28px 22px 36px;
  }
}

/* Gentle scroll-in animation — applied via script.js, degrades gracefully without JS */
.fade-up {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .fade-up {
    opacity: 1;
    transform: none;
    transition: none;
  }
}