:root {
  color-scheme: dark;
  --site-bg: #0b1020;
  --site-panel: rgba(13, 20, 37, 0.85);
  --site-panel-strong: rgba(17, 27, 48, 0.95);
  --site-line: rgba(255, 255, 255, 0.09);
  --site-text: #f5f7fb;
  --site-muted: #a6b3cb;
  --site-accent: #7db7ff;
  --site-accent-strong: #4a8ef4;
  --site-radius: 24px;
  --site-shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(125, 183, 255, 0.12), transparent 24%),
    radial-gradient(circle at bottom right, rgba(255, 255, 255, 0.05), transparent 24%),
    var(--site-bg);
  color: var(--site-text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a { color: inherit; }

img { max-width: 100%; display: block; }

body { padding: 24px; }

.site-shell {
  max-width: 1240px;
  margin: 0 auto;
  display: grid;
  gap: 24px;
}

.site-header,
.site-section,
.site-article,
.site-drawer {
  border: 1px solid var(--site-line);
  border-radius: var(--site-radius);
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01)), var(--site-panel);
  box-shadow: var(--site-shadow);
}

.site-header {
  padding: 22px;
  overflow: hidden;
}

.site-header-compact {
  padding-bottom: 18px;
}

.site-brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.site-brand {
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 0.03em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 16px;
}

.site-nav a,
.site-app-link,
.site-drawer a {
  text-decoration: none;
  color: var(--site-muted);
}

.site-nav a:hover,
.site-app-link:hover,
.site-drawer a:hover,
.site-brand:hover {
  color: var(--site-text);
}

.site-app-link {
  margin-left: auto;
}

.site-menu-toggle {
  appearance: none;
  border: 1px solid var(--site-line);
  border-radius: 999px;
  padding: 10px 14px;
  background: rgba(255,255,255,0.04);
  color: var(--site-text);
}

.site-hero {
  display: grid;
  gap: 16px;
  margin-top: 28px;
  max-width: 760px;
}

.site-kicker,
.site-section-kicker {
  margin: 0;
  color: var(--site-accent);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 12px;
}

.site-hero h1,
.site-section h2,
.site-article h1 {
  margin: 0;
  font-size: clamp(30px, 5vw, 54px);
  line-height: 1.05;
}

.site-section h2,
.site-article h1 {
  font-size: clamp(26px, 4vw, 40px);
}

.site-hero-text,
.site-article-excerpt,
.site-contact-card p {
  margin: 0;
  color: var(--site-muted);
  font-size: 17px;
  line-height: 1.7;
}

.site-hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.site-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--site-accent-strong);
  color: white;
  text-decoration: none;
}

.site-button-secondary {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--site-line);
}

.site-main {
  display: grid;
  gap: 24px;
}

.site-section {
  padding: 22px;
}

.site-section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.site-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.site-card {
  min-height: 100%;
}

.site-card-link {
  display: flex;
  flex-direction: column;
  height: 100%;
  text-decoration: none;
  border-radius: 20px;
  overflow: hidden;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.05);
}

.site-card-cover {
  aspect-ratio: 16 / 10;
  background: rgba(255,255,255,0.03);
}

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

.site-card-body {
  padding: 18px;
  display: grid;
  gap: 12px;
  flex: 1 1 auto;
}

.site-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--site-muted);
  font-size: 13px;
}

.site-chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(125, 183, 255, 0.12);
  border: 1px solid rgba(125, 183, 255, 0.22);
  color: #d7e9ff;
}

.site-card h3 {
  margin: 0;
  font-size: 24px;
  line-height: 1.2;
}

.site-card p {
  margin: 0;
  color: var(--site-muted);
  line-height: 1.65;
}

.site-card-more {
  margin-top: auto;
  color: var(--site-accent);
  font-weight: 700;
}

.site-empty {
  padding: 20px;
  border: 1px dashed var(--site-line);
  border-radius: 18px;
  color: var(--site-muted);
}

.site-contact-card {
  padding: 20px;
  border-radius: 18px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.05);
  display: grid;
  gap: 10px;
}

.site-contact-card a {
  color: var(--site-accent);
  text-decoration: none;
  font-weight: 700;
}

.site-article {
  padding: 22px;
  display: grid;
  gap: 18px;
}

.site-breadcrumbs a {
  color: var(--site-muted);
  text-decoration: none;
}

.site-article-head {
  display: grid;
  gap: 12px;
}

.site-article-cover {
  border-radius: 20px;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: rgba(255,255,255,0.03);
}

.site-article-content {
  line-height: 1.8;
  color: #eef2f8;
  font-size: 17px;
}

.site-article-content h2,
.site-article-content h3,
.site-article-content h4 {
  margin-top: 1.5em;
  margin-bottom: 0.6em;
}

.site-article-content p,
.site-article-content ul,
.site-article-content ol,
.site-article-content blockquote {
  margin: 0 0 1em;
}

.site-article-content img {
  border-radius: 18px;
}

.site-article-content a {
  color: var(--site-accent);
}

.site-drawer {
  padding: 16px 18px;
  display: grid;
  gap: 14px;
}

.site-bottom-nav {
  position: sticky;
  bottom: 12px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  padding: 10px;
  border-radius: 18px;
  border: 1px solid var(--site-line);
  background: rgba(8, 12, 24, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: var(--site-shadow);
}

.site-bottom-nav a,
.site-bottom-nav button {
  appearance: none;
  border: 0;
  border-radius: 14px;
  min-height: 46px;
  background: rgba(255,255,255,0.04);
  color: var(--site-text);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font: inherit;
}

.mobile-only { display: none; }

@media (max-width: 980px) {
  body { padding: 16px; }
  .site-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .desktop-only { display: none !important; }
  .mobile-only { display: inline-flex; }
  .site-card-grid { grid-template-columns: 1fr; }
  .site-header,
  .site-section,
  .site-article { padding: 18px; }
  .site-brand-row { align-items: center; }
  .site-shell { padding-bottom: 86px; }
}

.site-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  border-radius: 20px;
  overflow: hidden;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.05);
}

.site-card-title-link {
  color: inherit;
  text-decoration: none;
}

.site-card-title-link:hover {
  color: var(--site-accent);
}

.site-card-actions {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.site-card-more {
  text-decoration: none;
}

.site-chip-link {
  text-decoration: none;
}

.site-chip-link:hover {
  border-color: rgba(125, 183, 255, 0.34);
  background: rgba(125, 183, 255, 0.18);
}

.site-chip span {
  margin-left: 6px;
  color: var(--site-muted);
  font-size: 12px;
}

.site-category-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.site-resource-links {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.site-resource-links a {
  color: var(--site-muted);
  text-decoration: none;
  font-weight: 600;
}

.site-resource-links a:hover {
  color: var(--site-text);
}

.site-inline-meta {
  color: var(--site-muted);
  font-size: 14px;
}

.site-article-content blockquote {
  padding: 14px 16px;
  border-left: 3px solid rgba(125, 183, 255, 0.35);
  border-radius: 14px;
  background: rgba(255,255,255,0.03);
  color: var(--site-muted);
}

.site-article-content pre,
.site-article-content code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.site-article-content pre {
  overflow-x: auto;
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(0,0,0,0.28);
  border: 1px solid rgba(255,255,255,0.08);
}

.site-article-content code {
  padding: 0.15em 0.35em;
  border-radius: 8px;
  background: rgba(255,255,255,0.08);
}

.site-article-content pre code {
  padding: 0;
  background: transparent;
}

.site-article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 1.2em;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
}

.site-article-content th,
.site-article-content td {
  padding: 10px 12px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  text-align: left;
}

.site-article-content hr {
  border: 0;
  height: 1px;
  background: rgba(255,255,255,0.08);
  margin: 1.5em 0;
}

.site-category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.site-category-card {
  padding: 20px;
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,0.05);
  background: rgba(255,255,255,0.03);
  display: grid;
  gap: 14px;
}

.site-category-card-head {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 12px;
  flex-wrap: wrap;
}

.site-category-card h3 {
  margin: 4px 0 0;
  font-size: 24px;
}

.site-category-card p {
  margin: 0;
  color: var(--site-muted);
  line-height: 1.65;
}

.site-article-content figure {
  margin: 0 0 1.4em;
  display: grid;
  gap: 10px;
}

.site-article-content figcaption {
  color: var(--site-muted);
  font-size: 14px;
  text-align: center;
}

@media (max-width: 980px) {
  .site-category-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .site-category-grid {
    grid-template-columns: 1fr;
  }
}

.site-preview-banner {
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid rgba(255, 184, 77, 0.22);
  background: rgba(255, 184, 77, 0.08);
  color: #ffe6bf;
}

.site-article-toc {
  display: grid;
  gap: 10px;
  padding: 18px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(255,255,255,0.03);
}

.site-article-toc-title {
  font-weight: 800;
}

.site-article-toc nav {
  display: grid;
  gap: 10px;
}

.site-article-toc a {
  color: var(--site-muted);
  text-decoration: none;
}

.site-article-toc a:hover {
  color: var(--site-text);
}

.site-toc-level-3 {
  padding-left: 16px;
}

.site-author-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  padding: 16px 18px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(255,255,255,0.03);
}

.site-author-name {
  font-weight: 800;
}

.site-author-role {
  margin-top: 4px;
  color: var(--site-muted);
}

.site-tag-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.site-tag-chip {
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.08);
}

@media (max-width: 720px) {
  .site-author-card {
    align-items: flex-start;
  }
}

.site-card-author {
  color: var(--site-muted);
  font-size: 14px;
}

.site-author-link {
  color: var(--site-text);
  text-decoration: none;
  font-weight: 700;
}

.site-author-link:hover {
  color: var(--site-accent);
}

.site-author-hero-note {
  color: var(--site-muted);
  font-size: 14px;
}

.site-related-topic-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.site-faq-section {
  display: grid;
  gap: 14px;
}

.site-faq-list {
  display: grid;
  gap: 12px;
}

.site-faq-item {
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 18px;
  background: rgba(255,255,255,0.03);
  overflow: hidden;
}

.site-faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 18px;
  font-weight: 700;
}

.site-faq-item summary::-webkit-details-marker {
  display: none;
}

.site-faq-item > div {
  padding: 0 18px 18px;
  color: var(--site-muted);
  line-height: 1.7;
}