/* ============================================================================
   rust-for-csharp — shared styles
   Aesthetic: editorial dark "blueprint", warm oxidized-iron accents on a cool
   graphite ground. Distinctive type pairing, no generic AI gradients.
   ============================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400;0,9..144,600;1,9..144,500&family=Space+Mono:wght@400;700&family=Newsreader:opsz,wght@6..72,400;6..72,500&display=swap');

:root {
  --ink:        #0d0f12;
  --panel:      #14171c;
  --panel-2:    #1b1f26;
  --line:       #2a2f38;
  --fog:        #8b93a1;
  --paper:      #e7e3da;
  --paper-dim:  #b9b4a8;
  --rust:       #c8623a;   /* oxidized iron — the brand accent */
  --rust-bright:#e07a4d;
  --ember:      #d9a441;   /* warm secondary */
  --csharp:     #6a9bd1;   /* cool blue == "the C# side" */
  --good:       #6fae7d;
  --mono: 'Space Mono', ui-monospace, monospace;
  --display: 'Fraunces', Georgia, serif;
  --body: 'Newsreader', Georgia, serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 80% -10%, #1a1410 0%, transparent 55%),
    radial-gradient(900px 500px at -10% 110%, #0f1620 0%, transparent 50%),
    var(--ink);
  color: var(--paper);
  font-family: var(--body);
  font-size: 19px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* subtle blueprint grid overlay */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.05;
  pointer-events: none;
  z-index: 0;
}

.wrap {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
  padding: 0 28px 120px;
}

/* ---- hero ----------------------------------------------------------------- */
.hero { padding: 90px 0 40px; border-bottom: 1px solid var(--line); }
.kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--rust);
  margin: 0 0 18px;
}
h1 {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(2.6rem, 7vw, 4.6rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}
h1 em { font-style: italic; color: var(--rust-bright); }
.lede {
  font-size: 1.35rem;
  color: var(--paper-dim);
  max-width: 60ch;
  margin: 0;
}

/* ---- prose ---------------------------------------------------------------- */
h2 {
  font-family: var(--display);
  font-weight: 600;
  font-size: 2rem;
  letter-spacing: -0.01em;
  margin: 64px 0 8px;
  scroll-margin-top: 80px;
}
h2 .num {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--rust);
  display: block;
  letter-spacing: 0.2em;
  margin-bottom: 4px;
}
h3 {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.3rem;
  margin: 38px 0 6px;
}
p { margin: 14px 0; }
a { color: var(--rust-bright); text-underline-offset: 3px; }
strong { color: var(--paper); font-weight: 600; }
code {
  font-family: var(--mono);
  font-size: 0.82em;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1px 6px;
  color: var(--ember);
}

/* ---- callouts ------------------------------------------------------------- */
.note {
  border-left: 3px solid var(--rust);
  background: linear-gradient(90deg, rgba(200,98,58,0.08), transparent);
  padding: 14px 20px;
  margin: 26px 0;
  border-radius: 0 8px 8px 0;
}
.note .tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--rust);
}
.note.csharp { border-left-color: var(--csharp); background: linear-gradient(90deg, rgba(106,155,209,0.09), transparent); }
.note.csharp .tag { color: var(--csharp); }
.note.gotcha { border-left-color: var(--ember); background: linear-gradient(90deg, rgba(217,164,65,0.09), transparent); }
.note.gotcha .tag { color: var(--ember); }
.note p:first-child { margin-top: 0; }
.note p:last-child { margin-bottom: 0; }

/* ---- code blocks ---------------------------------------------------------- */
pre {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px 22px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.65;
  margin: 22px 0;
  position: relative;
}
pre .lbl {
  position: absolute;
  top: 0; right: 0;
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fog);
  background: var(--panel-2);
  border-left: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-radius: 0 11px 0 8px;
  padding: 4px 12px;
}
pre code { background: none; border: none; padding: 0; color: var(--paper); font-size: 1em; }
.tok-kw  { color: var(--rust-bright); }
.tok-ty  { color: var(--ember); }
.tok-fn  { color: var(--csharp); }
.tok-str { color: var(--good); }
.tok-com { color: var(--fog); font-style: italic; }
.tok-num { color: var(--ember); }

/* ---- side-by-side comparison --------------------------------------------- */
.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 24px 0;
}
.compare > div { min-width: 0; }
.compare h4 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin: 0 0 6px;
}
.compare .cs h4 { color: var(--csharp); }
.compare .rs h4 { color: var(--rust); }
.compare pre { margin: 0; height: 100%; }
@media (max-width: 720px) { .compare { grid-template-columns: 1fr; } }

/* ---- comparison table ----------------------------------------------------- */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.92rem;
}
th, td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
th {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fog);
}
td code { font-size: 0.9em; }
tr:hover td { background: rgba(255,255,255,0.015); }

/* ---- pager ---------------------------------------------------------------- */
.pager {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 80px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.pager a {
  flex: 1;
  text-decoration: none;
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  transition: border-color .15s, transform .15s;
}
.pager a:hover { border-color: var(--rust); transform: translateY(-2px); }
.pager .dir { font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--fog); }
.pager .ttl { display: block; font-family: var(--display); font-size: 1.15rem; color: var(--paper); margin-top: 4px; }
.pager .next { text-align: right; }
.pager .ghost { visibility: hidden; }

/* ---- toc cards (home) ----------------------------------------------------- */
.toc { display: grid; gap: 14px; margin: 40px 0; }
.toc a {
  display: flex;
  align-items: baseline;
  gap: 18px;
  text-decoration: none;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  transition: border-color .18s, transform .18s, background .18s;
}
.toc a:hover { border-color: var(--rust); transform: translateX(4px); background: var(--panel-2); }
.toc .idx { font-family: var(--mono); font-size: 1.1rem; color: var(--rust); flex: 0 0 auto; }
.toc .body h3 { margin: 0; color: var(--paper); }
.toc .body p { margin: 4px 0 0; color: var(--paper-dim); font-size: 0.98rem; }

footer {
  text-align: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fog);
  padding: 50px 0 0;
}

/* ---- sidebar (shared nav, injected by /nav.js) ---------------------------- */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: 248px;
  height: 100vh;
  overflow-y: auto;
  z-index: 20;
  padding: 24px 16px 32px;
  background: rgba(13, 15, 18, 0.92);
  backdrop-filter: blur(8px);
  border-right: 1px solid var(--line);
}
.sidebar .brand {
  display: block;
  margin: 0 10px 22px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper-dim);
  text-decoration: none;
}
.sidebar .brand b { color: var(--rust); }
.sidenav { display: flex; flex-direction: column; gap: 1px; }
.sidenav a {
  display: flex;
  align-items: baseline;
  gap: 11px;
  padding: 7px 11px;
  border-radius: 7px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--fog);
  text-decoration: none;
  transition: color .15s, background .15s;
}
.sidenav a:hover { color: var(--rust-bright); background: rgba(255, 255, 255, 0.03); }
.sidenav a[aria-current="page"] { color: var(--rust-bright); background: rgba(200, 98, 58, 0.13); }
.sidenav .n { font-size: 11px; min-width: 1.5em; color: var(--fog); opacity: 0.5; }
.sidenav a[aria-current="page"] .n { color: var(--rust); opacity: 1; }
.sidenav-sep { height: 1px; background: var(--line); margin: 12px 11px; }

/* the script adds this class to <body>; without JS the page just has no sidebar */
body.has-sidebar { padding-left: 248px; }

@media (max-width: 900px) {
  body.has-sidebar { padding-left: 0; }
  .sidebar {
    position: static;
    width: auto;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--line);
  }
  .sidebar .brand { margin-bottom: 14px; }
  .sidenav { flex-direction: row; flex-wrap: wrap; gap: 3px; }
  .sidenav-sep { display: none; }
}