:root {
  --bg: #0f172a;
  --panel: #111827;
  --panel-light: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --link: #38bdf8;
  --border: #334155;
  --accent: #22c55e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.95);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 1rem;
}

.site-title {
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--text);
}

.site-nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--muted);
  font-weight: 600;
}

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

.site-main {
  min-height: calc(100vh - 150px);
  padding: 3rem 0;
}

.hero {
  padding: 2rem 0 3rem;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.1;
  margin-bottom: 1rem;
}

.content {
  max-width: 800px;
}

.content code {
  background: var(--panel-light);
  padding: 0.15rem 0.3rem;
  border-radius: 0.25rem;
}

.content pre {
  background: #020617;
  padding: 1rem;
  border-radius: 0.75rem;
  overflow-x: auto;
  border: 1px solid var(--border);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0 3rem;
}

.card {
  display: block;
  padding: 1.25rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 1rem;
  color: var(--text);
}

.card:hover {
  border-color: var(--link);
  text-decoration: none;
}

.card h3 {
  margin-top: 0;
  color: var(--text);
}

.card p {
  color: var(--muted);
}

.post-list {
  display: grid;
  gap: 1rem;
}

.post-summary {
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: var(--panel);
}

.post-summary h2,
.post-summary h3 {
  margin-top: 0;
}

.meta {
  color: var(--muted);
  font-size: 0.95rem;
}

.term-list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.term-list li {
  padding: 1rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
}

.article h1 {
  max-width: 850px;
}

.post-taxonomies {
  margin: 1.5rem 0;
  padding: 1rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
}

.post-taxonomies p {
  margin: 0.3rem 0;
}

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  padding: 1.5rem 0;
  background: #020617;
}

@media (max-width: 700px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 1rem 1.25rem;
  }

  .site-nav {
    gap: 0.75rem;
  }
}

.content img,
.article img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 2rem auto;
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  background: #ffffff;
}

/* Better article readability */
.article {
  max-width: 1180px;
}

.article .content {
  max-width: 860px;
}

/* Hero diagram preview */
.hero-diagram {
  max-width: 1100px;
  margin: 2rem auto 2.5rem;
  padding: 1rem;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 1rem;
}

.hero-diagram a {
  display: block;
}

.hero-diagram img {
  width: 100%;
  max-height: 520px;
  object-fit: contain;
  display: block;
  margin: 0 auto;
  border: 0;
  border-radius: 0.5rem;
  background: #ffffff;
}

.hero-diagram figcaption {
  color: #475569;
  font-size: 0.95rem;
  text-align: center;
  margin-top: 0.75rem;
}

/* Table of contents */
.article .content > ul:first-of-type {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1rem 1rem 1rem 2rem;
}

.article .content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  overflow-x: auto;
  display: block;
}

.article .content th,
.article .content td {
  border: 1px solid var(--border);
  padding: 0.75rem;
  vertical-align: top;
}

.article .content th {
  background: var(--panel-light);
}

.article .content h2 {
  margin-top: 2.25rem;
  scroll-margin-top: 90px;
}

.article .content h3 {
  margin-top: 1.75rem;
}

@media (max-width: 700px) {
  .hero-diagram {
    padding: 0.5rem;
  }

  .hero-diagram img {
    max-height: 420px;
  }
}

/* Hero diagram preview and zoom link */
.hero-diagram,
figure.hero-diagram {
  max-width: 1100px;
  margin: 2rem auto 2.5rem;
  padding: 1rem;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 1rem;
}

.hero-diagram a,
figure.hero-diagram a {
  display: block;
}

.hero-diagram img,
figure.hero-diagram img {
  width: 100%;
  max-height: 520px;
  object-fit: contain;
  display: block;
  margin: 0 auto;
  border: 0;
  border-radius: 0.5rem;
  background: #ffffff;
}

.hero-diagram figcaption,
figure.hero-diagram figcaption {
  color: #475569;
  font-size: 0.95rem;
  text-align: center;
  margin-top: 0.75rem;
}

@media (max-width: 700px) {
  .hero-diagram,
  figure.hero-diagram {
    padding: 0.5rem;
  }

 .hero-diagram img,
  figure.hero-diagram img {
    max-height: 420px;
  }
}

/* Visitor map page */
.visitor-map-panel {
  margin: 2rem 0;
  padding: 1.25rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 1rem;
}

.visitor-map-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.visitor-map-header h2 {
  margin: 0 0 0.4rem;
}

.visitor-map-header p {
  margin: 0;
  color: var(--muted);
}

.visitor-map-stats {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.visitor-stat {
  min-width: 130px;
  padding: 0.9rem 1rem;
  background: #020617;
  border: 1px solid var(--border);
  border-radius: 0.85rem;
  text-align: center;
}

.visitor-stat span {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
}

.visitor-stat small {
  color: var(--muted);
}

.visitor-map-wrap {
  position: relative;
  overflow: hidden;
  border-radius: 1rem;
  border: 1px solid var(--border);
  background: #07111f;
}

#visitor-map {
  width: 100%;
  height: auto;
  display: block;
}

.visitor-country {
  cursor: pointer;
  transition: fill 0.15s ease, stroke 0.15s ease;
}

.visitor-tooltip {
  position: absolute;
  pointer-events: none;
  opacity: 0;
  z-index: 10;
  padding: 0.65rem 0.8rem;
  background: #020617;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 0.6rem;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  font-size: 0.9rem;
}

.visitor-tooltip strong,
.visitor-tooltip span {
  display: block;
}

.visitor-tooltip span {
  color: var(--muted);
}

.visitor-map-footer {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.8fr);
  gap: 1.25rem;
  margin-top: 1.25rem;
}

.visitor-map-footer h3 {
  margin-top: 0;
}

.visitor-ranking {
  display: grid;
  gap: 0.75rem;
}

.visitor-rank-label {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.3rem;
  color: var(--text);
}

.visitor-rank-label strong {
  color: var(--muted);
}

.visitor-rank-bar {
  height: 0.55rem;
  background: #020617;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.visitor-rank-bar span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, #22c55e, #38bdf8);
  border-radius: 999px;
}

.visitor-map-note {
  padding: 1rem;
  background: #020617;
  border: 1px solid var(--border);
  border-radius: 0.85rem;
}

.visitor-map-note p {
  color: var(--muted);
}

@media (max-width: 800px) {
  .visitor-map-header {
    flex-direction: column;
  }

  .visitor-map-stats {
    width: 100%;
  }

  .visitor-stat {
    flex: 1;
  }

  .visitor-map-footer {
    grid-template-columns: 1fr;
  }
}

/* Visitor map page */
.visitor-map-panel {
  margin: 2rem 0;
}

.visitor-map-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.visitor-map-header h2 {
  margin: 0 0 0.4rem;
}

.visitor-map-header p {
  margin: 0;
  color: var(--muted);
}

.visitor-map-stats {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.visitor-stat {
  min-width: 130px;
  padding: 0.9rem 1rem;
  background: #020617;
  border: 1px solid var(--border);
  border-radius: 0.85rem;
  text-align: center;
}

.visitor-stat span {
  display: block;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text);
}

.visitor-stat small {
  color: var(--muted);
}

.visitor-visual-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.8fr);
  gap: 1rem;
}

.visitor-card {
  position: relative;
  padding: 1rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 1rem;
}

.visitor-card h3 {
  margin-top: 0;
}

.visitor-map-card {
  overflow: hidden;
}

#visitor-globe {
  width: 100%;
  height: auto;
  display: block;
}

.visitor-node {
  cursor: pointer;
}

.visitor-tooltip {
  position: absolute;
  pointer-events: none;
  opacity: 0;
  z-index: 10;
  padding: 0.65rem 0.8rem;
  background: #020617;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 0.6rem;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  font-size: 0.9rem;
}

.visitor-tooltip strong,
.visitor-tooltip span {
  display: block;
}

.visitor-tooltip span {
  color: var(--muted);
}

.visitor-ranking {
  display: grid;
  gap: 0.8rem;
}

.visitor-rank-label {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.3rem;
  color: var(--text);
}

.visitor-rank-label strong {
  color: var(--muted);
}

.visitor-rank-bar {
  height: 0.55rem;
  background: #020617;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.visitor-rank-bar span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, #22c55e, #38bdf8);
  border-radius: 999px;
}

.visitor-heatmap-card {
  margin-top: 1rem;
}

.visitor-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
}

.visitor-tile {
  min-height: 105px;
  border-radius: 0.85rem;
  border: 1px solid rgba(255,255,255,0.12);
  padding: 0.85rem;
  display: flex;
  align-items: flex-end;
  box-shadow: inset 0 0 28px rgba(0,0,0,0.12);
}

.visitor-tile strong {
  display: block;
  font-size: 1.4rem;
  line-height: 1;
}

.visitor-tile span {
  display: block;
  font-size: 0.9rem;
  margin-top: 0.35rem;
}

.visitor-tile em {
  display: block;
  font-style: normal;
  font-weight: 800;
  margin-top: 0.4rem;
}

@media (max-width: 900px) {
  .visitor-map-header {
    flex-direction: column;
  }

  .visitor-visual-grid {
    grid-template-columns: 1fr;
  }

  .visitor-map-stats {
    width: 100%;
  }

  .visitor-stat {
    flex: 1;
  }
}

/* Visitor map page */
.visitor-map-panel {
  margin: 2rem 0;
}

.visitor-map-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.visitor-map-header h2 {
  margin: 0;
}

.visitor-map-stats {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.visitor-stat {
  min-width: 130px;
  padding: 0.9rem 1rem;
  background: #020617;
  border: 1px solid var(--border);
  border-radius: 0.85rem;
  text-align: center;
}

.visitor-stat span {
  display: block;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text);
}

.visitor-stat small {
  color: var(--muted);
}

.visitor-visual-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.8fr);
  gap: 1rem;
}

.visitor-card {
  position: relative;
  padding: 1rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 1rem;
}

.visitor-card h3 {
  margin-top: 0;
}

.visitor-map-card {
  overflow: hidden;
}

#visitor-globe {
  width: 100%;
  height: auto;
  display: block;
}

.visitor-node {
  cursor: pointer;
}

.visitor-tooltip {
  position: absolute;
  pointer-events: none;
  opacity: 0;
  z-index: 10;
  padding: 0.65rem 0.8rem;
  background: #020617;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 0.6rem;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  font-size: 0.9rem;
}

.visitor-tooltip strong,
.visitor-tooltip span {
  display: block;
}

.visitor-tooltip span {
  color: var(--muted);
}

.visitor-ranking {
  display: grid;
  gap: 0.8rem;
}

.visitor-rank-label {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.3rem;
  color: var(--text);
}

.visitor-rank-label strong {
  color: var(--muted);
}

.visitor-rank-bar {
  height: 0.55rem;
  background: #020617;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.visitor-rank-bar span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, #22c55e, #38bdf8);
  border-radius: 999px;
}

@media (max-width: 900px) {
  .visitor-map-header {
    flex-direction: column;
  }

  .visitor-visual-grid {
    grid-template-columns: 1fr;
  }

  .visitor-map-stats {
    width: 100%;
  }

  .visitor-stat {
    flex: 1;
  }
}