/* pg2osync — mdBook overrides: keep Rust's structure, make it feel like 2026 */
/* One theme only: the other entries stay in the DOM, out of the picker */
#theme-list #default_theme, #theme-list #light, #theme-list #coal, #theme-list #navy, #theme-list #ayu { display: none; }

:root {
  --content-max-width: 860px;
  --sidebar-target-width: 300px;
}

/* System font stack — no external request, instant load, native feel */
html {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Inter, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

.content main {
  line-height: 1.7;
  font-size: 15.5px;
  letter-spacing: -0.011em;
}

/* Headings: tighter, bolder, more hierarchy */
.content h1 {
  font-size: 2rem;
  font-weight: 750;
  letter-spacing: -0.025em;
  margin-top: 2.2em;
  border-bottom: 1px solid var(--table-border-color);
  padding-bottom: 0.35em;
}
.content h2 {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-top: 2em;
}
.content h3 {
  font-size: 1.15rem;
  font-weight: 650;
  letter-spacing: -0.015em;
}
.content h4 {
  font-weight: 650;
}

/* Links: modern blue, subtle underline */
.content a {
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}
.content a:hover {
  text-decoration-thickness: 0.12em;
}

/* Inline code: pill-like, not harsh */
.content code:not(pre code) {
  background: color-mix(in srgb, var(--bg) 92%, var(--fg) 8%);
  border: 1px solid color-mix(in srgb, var(--table-border-color) 80%, transparent);
  border-radius: 6px;
  padding: 0.15em 0.38em;
  font-size: 0.88em;
  font-weight: 500;
}

/* Code blocks: rounded, bordered, breathing room */
.content pre {
  border-radius: 10px;
  border: 1px solid var(--table-border-color);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
  margin: 1.4em 0;
}
.content pre > code {
  padding: 1.1em 1.2em;
  line-height: 1.6;
}

/* Admonitions (native mdBook > [!NOTE] etc. — mdBook 0.4.40+) */
.content blockquote {
  border-left-width: 3px;
  border-radius: 0 8px 8px 0;
  padding: 0.85em 1.1em;
  margin: 1.4em 0;
}
.content blockquote:has(> p > strong:first-child) {
  background: var(--quote-bg);
  border-left-color: var(--links);
}

/* Tables: card-like */
.content table {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--table-border-color);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
  display: table;
  width: 100%;
}
.content table thead th {
  font-weight: 650;
  letter-spacing: -0.01em;
  font-size: 0.9em;
  text-transform: none;
}

/* Search: pill, softer */
#searchbar {
  border-radius: 8px;
  padding: 6px 10px;
}

/* Sidebar: more air, clearer hierarchy */
.sidebar .chapter li.chapter-item {
  margin: 1px 0;
}
.sidebar .chapter li a {
  border-radius: 6px;
  padding: 4px 8px;
  margin-right: 6px;
}
.sidebar .chapter li a.active {
  font-weight: 650;
}
.sidebar .chapter li.part-title {
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-top: 1.2em;
  font-size: 0.78em;
  text-transform: uppercase;
  opacity: 0.7;
}

/* Menu bar: slightly taller, cleaner */
.menu-bar {
  border-bottom: 1px solid var(--table-border-color);
  backdrop-filter: saturate(1.2) blur(6px);
}

/* Rust, warmed up: the beige stays, the greys around it do not */
.rust {
  --bg: #fdfbf7;
  --fg: #1c1917;
  --sidebar-bg: #1c1917;
  --sidebar-fg: #e7e5e4;
  --sidebar-non-existant: #a8a29e;
  --sidebar-active: #fb923c;
  --sidebar-spacer: #292524;
  --scrollbar: #a8a29e;
  --icons: #a8a29e;
  --icons-hover: #fff7ed;
  --links: #c2410c;
  --inline-code-color: #9a3412;
  --quote-bg: #fff7ed;
  --quote-border: #fed7aa;
  --table-border-color: #f5e6d3;
  --table-header-bg: #ffedd5;
  --table-alternate-bg: #fffbf7;
  --searchbar-bg: #ffffff;
  --searchbar-fg: #1c1917;
  --searchbar-border-color: #e7d5c4;
  --searchbar-shadow-color: #fed7aa;
  --searchresults-header-fg: #78716c;
  --searchresults-border-color: #e7d5c4;
  --searchresults-li-bg: #fff7ed;
  --search-mark-bg: #fed7aa;
  --theme-popup-bg: #1c1917;
  --theme-popup-border: #44403c;
  --theme-hover: #292524;
  --warning-border: #f97316;
  --copy-button-filter: invert(60%) sepia(20%) saturate(400%) hue-rotate(350deg);
  --copy-button-filter-hover: invert(55%) sepia(80%) saturate(800%) hue-rotate(350deg);
  --footnote-highlight: #fed7aa;
  --overlay-bg: rgba(28, 25, 23, 0.35);
}
.rust .content pre {
  background: #f6f7f6;
  border-color: #e7d5c4;
  color: #1c1917;
}
.rust .content pre code { color: #1c1917; }
/* highlight.js comments were too pale to read on this background */
.rust .hljs-comment, .rust .hljs-quote { color: #6b6b6b !important; }
.rust .hljs-meta { color: #8a5a44 !important; }
.rust .content code:not(pre code) {
  background: #fff7ed;
  border-color: #fed7aa;
}

/* Light theme tuning — away from rust brown */
.light {
  --bg: #ffffff;
  --fg: #1a1a1e;
  --sidebar-bg: #f8f9fb;
  --sidebar-fg: #2a2a30;
  --sidebar-active: #0b57d0;
  --sidebar-spacer: #eceef2;
  --links: #0b57d0;
  --inline-code-color: #1a1a1e;
  --quote-bg: #f0f4ff;
  --quote-border: #c2d6ff;
  --table-border-color: #e8eaee;
  --table-header-bg: #f1f3f7;
  --table-alternate-bg: #f8f9fb;
  --searchbar-bg: #ffffff;
  --searchbar-border-color: #dde1e7;
  --theme-popup-bg: #ffffff;
  --theme-popup-border: #dde1e7;
}

/* Dark themes: reachable only by an old stored preference, not by the picker */
.navy {
  --bg: #0f172a;
  --fg: #e2e8f0;
  --sidebar-bg: #1e293b;
  --sidebar-fg: #cbd5e1;
  --sidebar-active: #38bdf8;
  --sidebar-spacer: #334155;
  --links: #38bdf8;
  --inline-code-color: #7dd3fc;
  --quote-bg: #1e293b;
  --quote-border: #334155;
  --table-border-color: #1e293b;
  --table-header-bg: #1e293b;
  --table-alternate-bg: #0f172a;
  --searchbar-bg: #1e293b;
  --searchbar-border-color: #334155;
  --searchbar-fg: #e2e8f0;
  --theme-popup-bg: #1e293b;
  --theme-popup-border: #334155;
  --icons: #94a3b8;
  --icons-hover: #f1f5f9;
}
.ayu {
  --bg: #0b1416;
  --fg: #cbd5e1;
  --sidebar-bg: #111d20;
  --sidebar-fg: #94a3b8;
  --sidebar-active: #2dd4bf;
  --links: #2dd4bf;
  --inline-code-color: #5eead4;
  --quote-bg: #142a2e;
  --quote-border: #1e3a3f;
  --table-border-color: #1e2e33;
  --table-header-bg: #1a2e33;
}
.coal {
  --bg: #0f1115;
  --fg: #d1d5db;
  --sidebar-bg: #181b20;
  --sidebar-fg: #9ca3af;
  --sidebar-active: #60a5fa;
  --links: #60a5fa;
  --inline-code-color: #93c5fd;
  --quote-bg: #1a1d23;
  --quote-border: #252a33;
  --table-border-color: #1f242e;
  --table-header-bg: #1a1f2a;
}

/* Koyu temalarda code block daha belirgin */
.navy .content pre, .ayu .content pre, .coal .content pre {
  background: #0b1220;
  border-color: #1e293b;
}
.navy .content code:not(pre code), .ayu .content code:not(pre code), .coal .content code:not(pre code) {
  background: #1e293b;
  border-color: #334155;
}

/* Mermaid diagrams centered */
pre.mermaid, .mermaid {
  background: var(--bg);
  display: flex;
  justify-content: center;
  padding: 1em;
}

/* Copy button: a bit bigger hit area */
.copy-button {
  border-radius: 6px;
}

/* Footer / edit link subtle */
.nav-wrapper a.mobile-nav-chapters { border-radius: 8px; }