/*
 * OISIF Articles — Medium-style Blog
 * ====================================
 *
 * FONT EXCEPTION: Articles use an editorial serif (Georgia)
 * instead of the standard Oisif monospace. Doto stays for
 * brand elements: logo, tags, badges, nav labels.
 */

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--oisif-bg);
  color: var(--oisif-fg);
  font-family: Georgia, 'Times New Roman', Times, serif;
  font-size: 14px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* Noise overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  opacity: var(--oisif-noise-opacity);
  background-image: var(--oisif-noise);
  background-size: var(--oisif-noise-size);
  pointer-events: none;
  z-index: 9998;
}

::selection {
  background: var(--oisif-accent);
  color: var(--oisif-bg);
}

a { color: var(--oisif-accent); text-decoration: none; }
a:hover { color: var(--oisif-fg); }

/* ══════════════════════════════════════════════════════════════
   HEADER
   ══════════════════════════════════════════════════════════════ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: var(--oisif-surface);
  box-shadow: var(--oisif-shadow-out);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  z-index: 100;
}

.header-logo {
  font-family: var(--oisif-font-display);
  font-size: 16px;
  letter-spacing: 6px;
  text-transform: uppercase;
  color: var(--oisif-accent);
  cursor: pointer;
  transition: color 0.2s;
}

.header-logo:hover { color: var(--oisif-fg); }

.header-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.header-nav a {
  font-family: var(--oisif-font-display);
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--oisif-dim);
  cursor: pointer;
  transition: color 0.2s;
}

.header-nav a:hover {
  color: var(--oisif-fg);
}

.header-nav a.active {
  color: var(--oisif-accent);
}

/* ══════════════════════════════════════════════════════════════
   CONTAINER
   ══════════════════════════════════════════════════════════════ */

.container {
  max-width: 700px;
  margin: 0 auto;
  padding: 80px 24px 80px;
}

/* ══════════════════════════════════════════════════════════════
   LISTING VIEW
   ══════════════════════════════════════════════════════════════ */

/* Section label — keep Doto for brand labels */
.section-label {
  font-family: var(--oisif-font-display);
  font-size: 9px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--oisif-text-hint);
  margin-bottom: 8px;
}

.section-rule {
  width: 30px;
  height: 1px;
  background: var(--oisif-text-sep);
  margin-bottom: 24px;
}

/* Hero article (featured) */
.listing-hero {
  margin-bottom: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--oisif-text-sep);
  cursor: pointer;
  transition: opacity 0.2s;
}

.listing-hero:hover {
  opacity: 0.85;
}

.listing-hero .article-card-title {
  font-size: 32px;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
  line-height: 1.2;
}

.listing-hero .article-card-subtitle {
  font-size: 17px;
  line-height: 1.7;
  margin-bottom: 16px;
}

/* Article card */
.article-card {
  padding: 24px 0;
  border-bottom: 1px solid var(--oisif-text-sep);
  cursor: pointer;
  transition: opacity 0.2s;
}

.article-card:hover {
  opacity: 0.85;
}

.article-card:last-child {
  border-bottom: none;
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.article-card-author {
  font-family: var(--oisif-font-display);
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--oisif-dim);
}

.meta-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--oisif-text-sep);
}

.article-card-date {
  font-family: var(--oisif-font-display);
  font-size: 9px;
  letter-spacing: 1px;
  color: var(--oisif-text-hint);
}

/* Article card title — editorial serif */
.article-card-title {
  font-family: Georgia, 'Times New Roman', Times, serif;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--oisif-fg);
  margin-bottom: 6px;
  line-height: 1.3;
  transition: color 0.2s;
}

.article-card:hover .article-card-title,
.listing-hero:hover .article-card-title {
  color: var(--oisif-accent);
}

/* Article card subtitle — editorial serif */
.article-card-subtitle {
  font-family: Georgia, 'Times New Roman', Times, serif;
  color: var(--oisif-text-muted);
  font-size: 15px;
  line-height: 1.6;
  margin-bottom: 12px;
}

.article-card-footer {
  display: flex;
  align-items: center;
  gap: 12px;
}

.article-card-time {
  font-family: var(--oisif-font-display);
  font-size: 9px;
  letter-spacing: 1px;
  color: var(--oisif-text-hint);
}

.series-badge {
  font-family: var(--oisif-font-display);
  font-size: 8px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--oisif-accent);
  padding: 2px 10px;
  background: var(--oisif-surface);
  box-shadow: var(--oisif-shadow-out-sm);
  border-radius: 1px;
}

/* Series section */
.series-section {
  margin-top: 16px;
}

.series-section-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.series-section-title {
  font-family: var(--oisif-font-display);
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--oisif-accent);
}

.series-section-count {
  font-family: var(--oisif-font-display);
  font-size: 9px;
  letter-spacing: 1px;
  color: var(--oisif-text-hint);
}

/* ══════════════════════════════════════════════════════════════
   ARTICLE VIEW
   ══════════════════════════════════════════════════════════════ */

#article-view {
  display: none;
}

/* Back link — Doto */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--oisif-font-display);
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--oisif-dim);
  cursor: pointer;
  margin-bottom: 32px;
  transition: color 0.2s;
}

.back-link:hover {
  color: var(--oisif-accent);
}

/* Article header */
.article-header {
  margin-bottom: 40px;
}

/* Article title — editorial serif, large */
.article-title {
  font-family: Georgia, 'Times New Roman', Times, serif;
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--oisif-fg);
  line-height: 1.2;
  margin-bottom: 16px;
}

/* Article subtitle — editorial serif */
.article-subtitle {
  font-family: Georgia, 'Times New Roman', Times, serif;
  color: var(--oisif-text-muted);
  font-size: 18px;
  line-height: 1.6;
  margin-bottom: 28px;
}

.article-author-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--oisif-text-sep);
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--oisif-surface);
  box-shadow: var(--oisif-shadow-out-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--oisif-accent);
  flex-shrink: 0;
  font-family: Georgia, serif;
}

.author-info {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.author-name {
  font-family: var(--oisif-font-display);
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--oisif-fg);
}

.author-meta {
  font-family: var(--oisif-font-display);
  font-size: 9px;
  letter-spacing: 1px;
  color: var(--oisif-text-hint);
}

/* ══════════════════════════════════════════════════════════════
   ARTICLE BODY — editorial serif throughout
   ══════════════════════════════════════════════════════════════ */

.article-body {
  margin-top: 40px;
}

.article-body p {
  font-family: Georgia, 'Times New Roman', Times, serif;
  color: var(--oisif-text-muted);
  font-size: 18px;
  line-height: 1.85;
  margin-bottom: 24px;
}

/* Section headers — editorial serif bold */
.article-body h2 {
  font-family: Georgia, 'Times New Roman', Times, serif;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--oisif-fg);
  margin: 48px 0 16px;
  line-height: 1.3;
}

.article-body h3 {
  font-family: Georgia, 'Times New Roman', Times, serif;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.2px;
  color: var(--oisif-dim);
  margin: 36px 0 12px;
  line-height: 1.3;
}

.article-body .sep {
  text-align: center;
  color: var(--oisif-text-hint);
  margin: 40px 0;
  letter-spacing: 8px;
  font-size: 14px;
  user-select: none;
}

.article-body .pull-quote {
  border-left: 2px solid var(--oisif-accent);
  padding: 4px 0 4px 24px;
  margin: 32px 0;
  font-family: Georgia, 'Times New Roman', Times, serif;
  font-style: italic;
  color: var(--oisif-dim);
  font-size: 20px;
  line-height: 1.7;
}

/* Tags — Doto */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--oisif-text-sep);
}

.tag {
  font-family: var(--oisif-font-display);
  font-size: 9px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--oisif-text-hint);
  padding: 4px 12px;
  background: var(--oisif-surface);
  box-shadow: var(--oisif-shadow-out-sm);
  border-radius: 1px;
}

/* Series navigation box */
.series-nav {
  margin-top: 40px;
  padding: 20px;
  background: var(--oisif-surface);
  box-shadow: var(--oisif-shadow-out);
  border-radius: 2px;
}

.series-nav-title {
  font-family: var(--oisif-font-display);
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--oisif-accent);
  margin-bottom: 14px;
}

.series-nav-links {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.series-nav-link {
  font-family: Georgia, 'Times New Roman', Times, serif;
  font-size: 14px;
  color: var(--oisif-dim);
  cursor: pointer;
  padding: 6px 10px;
  border-radius: 1px;
  transition: color 0.2s, background 0.2s;
}

.series-nav-link:hover {
  color: var(--oisif-fg);
  background: var(--oisif-bg);
}

.series-nav-link.current {
  color: var(--oisif-accent);
  background: var(--oisif-bg);
  box-shadow: var(--oisif-shadow-in-sm);
}

/* Author bio box */
.author-bio {
  margin-top: 40px;
  padding: 24px;
  background: var(--oisif-surface);
  box-shadow: var(--oisif-shadow-out);
  border-radius: 2px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.author-bio .author-avatar {
  flex-shrink: 0;
}

.author-bio-body {
  flex: 1;
}

.author-bio-name {
  font-family: var(--oisif-font-display);
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--oisif-fg);
  margin-bottom: 8px;
}

.author-bio-text {
  font-family: Georgia, 'Times New Roman', Times, serif;
  font-size: 14px;
  color: var(--oisif-dim);
  line-height: 1.7;
}

/* Prev/Next navigation */
.article-nav {
  display: flex;
  gap: 16px;
  margin-top: 40px;
}

.article-nav-link {
  flex: 1;
  padding: 16px;
  background: var(--oisif-surface);
  box-shadow: var(--oisif-shadow-out-sm);
  border-radius: 2px;
  cursor: pointer;
  transition: box-shadow 0.2s, transform 0.2s;
}

.article-nav-link:hover {
  box-shadow: var(--oisif-shadow-out-sm), 0 0 0 1px var(--oisif-accent);
  transform: translateY(-1px);
}

.article-nav-label {
  font-family: var(--oisif-font-display);
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--oisif-text-hint);
  margin-bottom: 6px;
}

.article-nav-title {
  font-family: Georgia, 'Times New Roman', Times, serif;
  font-size: 14px;
  font-weight: 700;
  color: var(--oisif-fg);
  transition: color 0.2s;
}

.article-nav-link:hover .article-nav-title {
  color: var(--oisif-accent);
}

.article-nav-link.next {
  text-align: right;
}

/* Footer */
.footer {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--oisif-text-sep);
  text-align: center;
}

.footer-text {
  font-family: var(--oisif-font-display);
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--oisif-text-hint);
}

/* ══════════════════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════════════════ */

@media (max-width: 600px) {
  .container {
    padding: 72px 16px 60px;
  }

  .header {
    padding: 0 16px;
  }

  .article-title {
    font-size: 28px;
  }

  .listing-hero .article-card-title {
    font-size: 26px;
  }

  .article-body p {
    font-size: 16px;
  }

  .article-body h2 {
    font-size: 22px;
  }

  .article-nav {
    flex-direction: column;
  }

  .article-nav-link.next {
    text-align: left;
  }

  .author-bio {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}