:root {
  color-scheme: light;
  --font-serif: "Noto Serif", Georgia, "Times New Roman", serif;
  --font-sans: "Roboto Condensed", Arial, sans-serif;
  --page-width: 1180px;
  --content-width: 760px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 28px;
  --shadow-soft: 0 18px 60px rgb(0 0 0 / 0.12);
  --transition: 180ms ease;
}

:root[data-theme="empire"] {
  --bg: #efe2c4;
  --bg-pattern: radial-gradient(circle at top left, rgb(126 83 39 / 0.14), transparent 32rem), linear-gradient(90deg, rgb(74 44 23 / 0.035) 1px, transparent 1px);
  --surface: #fbf4df;
  --surface-strong: #fff9e8;
  --text: #25170f;
  --muted: #6e5a45;
  --border: #bda579;
  --border-strong: #7d5d2c;
  --primary: #5b2618;
  --primary-contrast: #fff8e8;
  --accent: #9a7628;
  --accent-strong: #593d15;
  --link: #63301d;
  --focus: #b48a2c;
  --danger: #8f2518;
  --card-decoration: double;
  --display-font: var(--font-serif);
  --body-font: var(--font-serif);
}

:root[data-theme="ussr"] {
  --bg: #e5e0d2;
  --bg-pattern: linear-gradient(135deg, rgb(177 24 18 / 0.1) 0 14%, transparent 14% 100%), linear-gradient(90deg, rgb(28 28 28 / 0.055) 1px, transparent 1px);
  --surface: #f4f0e4;
  --surface-strong: #fffdf4;
  --text: #171717;
  --muted: #5d5a52;
  --border: #222222;
  --border-strong: #111111;
  --primary: #b11812;
  --primary-contrast: #fff9eb;
  --accent: #1f1f1f;
  --accent-strong: #b11812;
  --link: #9f1712;
  --focus: #d73322;
  --danger: #9f1712;
  --card-decoration: solid;
  --display-font: var(--font-sans);
  --body-font: var(--font-sans);
}

* { box-sizing: border-box; }

html { min-height: 100%; }

body {
  min-height: 100%;
  margin: 0;
  background: var(--bg);
  background-image: var(--bg-pattern);
  background-size: auto, 28px 28px;
  color: var(--text);
  font-family: var(--body-font);
  font-size: 17px;
  line-height: 1.6;
}

a {
  color: var(--link);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

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

img, video { max-width: 100%; height: auto; }

button, input, select, textarea { font: inherit; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: 1rem;
  z-index: 20;
  transform: translateY(-160%);
  background: var(--primary);
  color: var(--primary-contrast);
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 2px var(--card-decoration) var(--border-strong);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: blur(16px);
}

.header-inner {
  width: min(100% - 2rem, var(--page-width));
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 0;
}

.site-brand {
  margin-right: auto;
  color: var(--text);
  font-family: var(--display-font);
  font-size: clamp(1.35rem, 2vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.project-menu { position: relative; }

.project-menu__button,
.theme-toggle,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 42px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--surface-strong);
  color: var(--text);
  cursor: pointer;
  padding: 0.55rem 0.95rem;
  text-decoration: none;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

.project-menu__button:hover,
.theme-toggle:hover,
.button:hover {
  background: var(--primary);
  color: var(--primary-contrast);
  transform: translateY(-1px);
}

.project-menu__panel {
  position: absolute;
  right: 0;
  top: calc(100% + 0.65rem);
  min-width: 260px;
  padding: 0.55rem;
  border: 2px var(--card-decoration) var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--surface-strong);
  box-shadow: var(--shadow-soft);
}

.project-menu__item {
  display: block;
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.75rem;
  color: var(--text);
  text-decoration: none;
}

.project-menu__item:hover,
.project-menu__item[aria-current="page"] {
  background: var(--primary);
  color: var(--primary-contrast);
}

.theme-toggle__mark {
  width: 18px;
  height: 18px;
  border: 2px solid currentColor;
  border-radius: 50%;
  background: linear-gradient(90deg, currentColor 0 50%, transparent 50% 100%);
}

.site-main {
  width: min(100% - 2rem, var(--page-width));
  margin: 0 auto;
  padding: clamp(2rem, 4vw, 4rem) 0;
}

.stack > * + * { margin-top: 1rem; }

.hero {
  position: relative;
  margin-bottom: 1.5rem;
  padding: clamp(1.5rem, 4vw, 3rem);
  border: 2px var(--card-decoration) var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--surface);
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  right: -3rem;
  top: -3rem;
  width: 14rem;
  height: 14rem;
  border: 1.4rem solid color-mix(in srgb, var(--primary) 18%, transparent);
  transform: rotate(16deg);
}

:root[data-theme="empire"] .hero::after { border-radius: 50%; }

:root[data-theme="ussr"] .hero::after { border-radius: 0; }

.hero > * { position: relative; z-index: 1; }

.hero h1,
.content-hero h1,
.section-heading h2 {
  margin: 0;
  font-family: var(--display-font);
  font-size: clamp(2.25rem, 6vw, 5rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
}

.related-section .section-heading h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  line-height: 1.1;
}

.hero p,
.lede {
  max-width: 760px;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.25rem);
}

.eyebrow,
.type-kicker,
.entity-card__kicker {
  margin: 0;
  color: var(--accent-strong);
  font-family: var(--display-font);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.filter-panel {
  margin: 1.5rem 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  overflow: hidden;
}

.filter-panel__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
  padding: 0.85rem 1rem;
  color: var(--text);
  font-family: var(--display-font);
  font-weight: 700;
  list-style: none;
}

.filter-panel__summary::-webkit-details-marker { display: none; }

.filter-panel__summary::after {
  content: "+";
  display: grid;
  width: 1.8rem;
  height: 1.8rem;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  color: var(--primary);
  transition: transform var(--transition), background var(--transition), color var(--transition);
}

.filter-panel[open] .filter-panel__summary {
  border-bottom: 1px solid var(--border);
}

.filter-panel[open] .filter-panel__summary::after {
  content: "-";
  background: var(--primary);
  color: var(--primary-contrast);
}

.filter-panel__summary:hover {
  background: color-mix(in srgb, var(--primary) 8%, transparent);
}

.filter-panel__hint {
  margin-left: auto;
  color: var(--muted);
  font-family: var(--body-font);
  font-size: 0.92rem;
  font-weight: 400;
}

.filter-panel__body {
  padding: 1rem;
}

.filter-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.85rem;
}

.filter-field {
  display: grid;
  gap: 0.25rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.filter-field--wide { grid-column: span 2; }

.filter-field input,
.filter-field select {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-strong);
  color: var(--text);
  padding: 0.55rem 0.65rem;
}

.tag-filter,
.tag-list,
.filter-actions,
.meta-row,
.card-meta,
.card-topline,
.footer-nav,
.back-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
}

.tag-filter { margin-top: 1rem; }

.filter-actions {
  justify-content: space-between;
  margin-top: 1rem;
  color: var(--muted);
}

.tag {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface-strong) 84%, transparent);
  color: var(--link);
  padding: 0.22rem 0.62rem;
  font-size: 0.9rem;
  line-height: 1.4;
  text-decoration: none;
}

.tag--button { cursor: pointer; }

.tag--button[aria-pressed="true"] {
  border-color: var(--primary);
  background: var(--primary);
  color: var(--primary-contrast);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.card-grid--compact { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.content-card {
  display: grid;
  min-height: 100%;
  border: 2px var(--card-decoration) var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.content-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-soft);
  transform: translateY(-2px);
}

.content-card[hidden] { display: none; }

.card-cover {
  display: block;
  aspect-ratio: 16 / 10;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.card-cover img,
.cover-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-body {
  display: grid;
  gap: 0.8rem;
  padding: 1rem;
}

.card-body h3 {
  margin: 0;
  font-family: var(--display-font);
  font-size: 1.45rem;
  line-height: 1.15;
}

.card-body h3 a,
.entity-card a {
  color: var(--text);
  text-decoration: none;
}

.card-body p,
.card-meta,
.card-topline { margin: 0; color: var(--muted); }

.type-badge {
  border: 1px solid var(--primary);
  border-radius: var(--radius-sm);
  background: var(--primary);
  color: var(--primary-contrast);
  padding: 0.08rem 0.45rem;
  font-size: 0.84rem;
  text-decoration: none;
}

.entity-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.entity-card {
  border: 2px var(--card-decoration) var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.entity-card a {
  display: grid;
  gap: 0.65rem;
  min-height: 100%;
  padding: 1.25rem;
}

.entity-card h2 { margin: 0; font-family: var(--display-font); line-height: 1.1; }
.entity-card p { margin: 0; color: var(--muted); }

.pagination {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.pagination button {
  min-width: 42px;
  min-height: 42px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-strong);
  color: var(--text);
  cursor: pointer;
}

.pagination button[aria-current="page"] {
  border-color: var(--primary);
  background: var(--primary);
  color: var(--primary-contrast);
}

.empty-state {
  margin-top: 1.5rem;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--surface);
  padding: 2rem;
  text-align: center;
}

.content-page {
  width: min(100%, var(--content-width));
  margin: 0 auto;
}

.back-nav { margin-bottom: 1.5rem; }

.content-hero {
  border-bottom: 2px var(--card-decoration) var(--border);
  padding-bottom: 1.5rem;
}

.article-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin: 0;
  position: relative;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--surface) 86%, transparent);
  color: var(--muted);
  font-size: 0.94rem;
}

.content-hero .article-stats {
  margin-top: 1.5rem;
}

.content-hero .article-stats::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -0.75rem;
  border-top: 1px solid var(--border);
}

.article-stats span {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.article-stats span + span::before {
  content: "";
  width: 0.32rem;
  height: 0.32rem;
  border-radius: 50%;
  background: var(--accent-strong);
}

.project-neighbors {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2.25rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.project-neighbor {
  display: grid;
  gap: 0.35rem;
  min-height: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--text);
  padding: 1rem;
  text-decoration: none;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.project-neighbor:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-soft);
  transform: translateY(-1px);
}

.project-neighbor span {
  color: var(--muted);
  font-size: 0.9rem;
}

.project-neighbor strong {
  font-family: var(--display-font);
  font-size: 1.05rem;
  line-height: 1.2;
}

.project-neighbor--next {
  text-align: right;
}

.project-neighbor--empty {
  visibility: hidden;
}

.cover-frame,
.media-panel,
.download-panel {
  margin: 1.5rem 0;
  border: 2px var(--card-decoration) var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  overflow: hidden;
}

.cover-frame { aspect-ratio: 16 / 9; }

.media-panel { padding: 1rem; }
.media-panel video, .media-panel audio { display: block; width: 100%; }

.download-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem;
}

.button--primary {
  background: var(--primary);
  color: var(--primary-contrast);
}

.rich-content {
  font-size: 1.08rem;
}

.rich-content h2,
.rich-content h3,
.rich-content h4 {
  margin-top: 2rem;
  font-family: var(--display-font);
  line-height: 1.15;
}

.rich-content p { margin: 1rem 0; }

.rich-content blockquote {
  margin: 1.5rem 0;
  border-left: 0.35rem solid var(--primary);
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  padding: 1rem 1.2rem;
  color: var(--muted);
}

.rich-content table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
}

.rich-content th,
.rich-content td {
  border: 1px solid var(--border);
  padding: 0.65rem;
}

.rich-content th { background: var(--surface); text-align: left; }

.rich-content code,
.rich-content pre {
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--accent) 12%, var(--surface));
}

.rich-content code { padding: 0.1rem 0.25rem; }
.rich-content pre { overflow-x: auto; padding: 1rem; }

.rich-content figure { margin: 1.5rem 0; }
.rich-content figcaption { color: var(--muted); font-size: 0.92rem; }

.rich-content .content-embed {
  margin: 1.5rem 0;
}

.rich-content .content-embed__frame {
  position: relative;
  aspect-ratio: var(--embed-ratio, 16 / 9);
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.rich-content .content-embed__frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.rich-content .content-embed figcaption {
  margin-top: 0.55rem;
}

.section { margin-top: 3rem; }

.site-footer {
  width: min(100% - 2rem, var(--page-width));
  margin: 0 auto;
  border-top: 2px var(--card-decoration) var(--border-strong);
  padding: 2rem 0 3rem;
  color: var(--muted);
}

.footer-nav { margin-bottom: 0.75rem; }
.footer-note { margin: 0; }

@media (max-width: 920px) {
  .filter-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .filter-field--wide { grid-column: span 2; }
  .card-grid,
  .card-grid--compact,
  .entity-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .header-inner { align-items: stretch; flex-wrap: wrap; }
  .site-brand { width: 100%; }
  .project-menu { flex: 1 1 auto; }
  .project-menu__button,
  .theme-toggle { width: 100%; }
  .project-menu__panel { left: 0; right: auto; width: min(86vw, 320px); }
  .filter-grid { grid-template-columns: 1fr; }
  .filter-field--wide { grid-column: auto; }
  .card-grid,
  .card-grid--compact,
  .entity-grid { grid-template-columns: 1fr; }
  .filter-actions,
  .download-panel { align-items: stretch; flex-direction: column; }
  .filter-panel__summary { align-items: flex-start; }
  .filter-panel__hint { display: none; }
  .project-neighbors { grid-template-columns: 1fr; }
  .project-neighbor--next { text-align: left; }
  .project-neighbor--empty { display: none; }
  .download-panel .button { width: 100%; }
}