:root {
  --ink: #050505;
  --muted: #444;
  --quiet: #777;
  --paper: #ffffff;
  --line: #ddd;
  --focus: #005fcc;
  --nav-width: 240px;
  --header-height: 56px;
  color-scheme: light;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

a { color: var(--focus); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* Layout */
.wrapper { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar {
  width: var(--nav-width);
  flex-shrink: 0;
  border-right: 1px solid var(--line);
  padding: 24px 16px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  background: var(--paper);
}

.sidebar h1 {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 4px;
  line-height: 1.3;
}

.sidebar h1 a { color: var(--ink); }
.sidebar .tagline { font-size: 12px; color: var(--quiet); margin: 0 0 20px; }

.sidebar nav { display: flex; flex-direction: column; gap: 2px; }

.sidebar .section-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--quiet);
  margin-top: 16px;
  margin-bottom: 4px;
  padding: 0 8px;
}

.sidebar a:not(.section-label) {
  display: block;
  padding: 5px 8px;
  font-size: 14px;
  color: var(--muted);
  border-radius: 4px;
  transition: background 120ms, color 120ms;
}

.sidebar a:hover:not(.section-label) {
  background: #f0f0f0;
  color: var(--ink);
  text-decoration: none;
}

.sidebar a.active:not(.section-label) {
  background: #e8f0fe;
  color: var(--focus);
  font-weight: 600;
}

/* Main content */
.main {
  flex: 1;
  min-width: 0;
  padding: 32px 48px 64px;
  max-width: 860px;
  position: relative;
}
.contribute-link {
  position: absolute;
  top: 12px;
  right: 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--focus);
  text-decoration: none;
}
.contribute-link:hover { text-decoration: underline; }
.footer .sponsor { font-size: 12px; color: var(--quiet); margin-top: 8px; }
.footer .sponsor a { color: var(--focus); }

/* Article header */
.article-header { margin-bottom: 32px; }
.article-header .breadcrumbs { font-size: 13px; color: var(--quiet); margin-bottom: 8px; }
.article-header .breadcrumbs a { color: var(--quiet); }
.article-header .breadcrumbs a:hover { color: var(--focus); }
.article-header h1 { font-size: 36px; line-height: 1.2; margin: 0 0 8px; font-weight: 700; }
.article-header .deck { font-size: 17px; color: var(--muted); margin: 0; max-width: 620px; }
.article-header .byline { font-size: 13px; color: var(--quiet); margin-top: 8px; }

/* TOC */
.toc {
  background: #f8f8f8;
  border: 1px solid var(--line);
  padding: 16px 20px;
  margin-bottom: 32px;
  font-size: 14px;
}

.toc strong { display: block; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--quiet); margin-bottom: 8px; }

.toc ol { margin: 0; padding-left: 20px; }
.toc li { margin-bottom: 4px; }
.toc a { color: var(--focus); }

/* Content */
.content { font-size: 16px; line-height: 1.7; }

.content h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 40px 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
}

.content h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 28px 0 8px;
}

.content p { margin: 0 0 16px; color: var(--muted); max-width: 680px; }
.content strong { color: var(--ink); }

.content ul, .content ol { margin: 0 0 16px; padding-left: 22px; }
.content li { margin-bottom: 6px; color: var(--muted); }

.content a { text-decoration: underline; text-underline-offset: 2px; }
.content a:hover { text-decoration: none; }

.content img { border: 1px solid var(--line); margin: 16px 0; display: block; }

.content blockquote {
  margin: 16px 0;
  padding: 12px 16px;
  background: #f8f8f8;
  border-left: 3px solid var(--focus);
  font-size: 15px;
  color: var(--muted);
}

pre {
  background: #f8f8f8;
  border: 1px solid var(--line);
  padding: 12px 16px;
  font-size: 13px;
  overflow-x: auto;
  white-space: pre-wrap;
  line-height: 1.5;
}

/* Infobox */
.infobox {
  float: right;
  width: 260px;
  margin: 0 0 16px 24px;
  border: 1px solid var(--line);
  font-size: 14px;
}

.infobox th, .infobox td { padding: 6px 10px; text-align: left; border-bottom: 1px solid #eee; }
.infobox th { font-weight: 600; white-space: nowrap; color: var(--quiet); font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; }
.infobox td { width: 100%; }

/* Category links */
.categories {
  margin-top: 40px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--quiet);
}

.categories a { color: var(--muted); }
.categories a:hover { color: var(--focus); }

/* Card list (for visa type index) */
.card-list { display: flex; flex-direction: column; gap: 4px; margin: 12px 0 24px; }

.card-row {
  display: flex;
  align-items: center;
  padding: 8px 12px;
  border: 1px solid var(--line);
  transition: background 120ms;
  gap: 12px;
}

.card-row:hover { background: #f8f8f8; text-decoration: none; }

.card-row strong { font-size: 15px; color: var(--ink); flex: 1; }
.card-row small { font-size: 13px; color: var(--quiet); }

/* Search bar */
.search-bar {
  display: flex;
  margin-bottom: 24px;
  gap: 6px;
}

.search-bar input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--line);
  font: inherit;
  font-size: 14px;
  border-radius: 0;
}

.search-bar button {
  padding: 8px 14px;
  background: var(--ink);
  color: var(--paper);
  border: none;
  font: inherit;
  font-size: 14px;
  cursor: pointer;
}

/* Footer */
.footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--quiet);
}

.footer a { color: var(--muted); }

/* Visa grid - compact multi-column */
.visa-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px 8px;
  max-width: 100%;
}

@media (max-width: 600px) {
  .visa-grid { grid-template-columns: 1fr; }
}

.visa-item {
  padding: 5px 6px;
  font-size: 13px;
  display: block;
  color: var(--ink);
  text-decoration: none;
  border-radius: 4px;
  transition: background 120ms;
}

a.visa-item:hover {
  background: #f0f0f0;
  text-decoration: none;
}

.visa-item strong {
  font-size: 13px;
}

.visa-item .tag {
  color: var(--quiet);
  font-size: 11px;
}

/* Responsive */
@media (max-width: 800px) {
  .sidebar { display: none; }
  .main { padding: 24px 20px 48px; }
  .article-header h1 { font-size: 28px; }
  .infobox { float: none; width: 100%; margin: 16px 0; }
}