:root {
  color-scheme: light dark;
  --red: #D9291C;
  --bg: #f6f7f9;
  --card: #fff;
  --text: #1a1d21;
  --muted: #6b7280;
  --line: #e4e7eb;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #111315; --card: #1b1e21; --text: #e8eaed; --muted: #9aa0a6; --line: #2a2e33; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
main { max-width: 680px; margin: 0 auto; padding: 48px 16px 80px; }
.brand { display: flex; align-items: center; gap: 14px; color: var(--text); text-decoration: none; }
.brand img { width: 52px; height: 52px; border-radius: 12px; }
.brand span { font-size: 26px; font-weight: 800; }
.tag { color: var(--muted); font-size: 14px; margin: 6px 0 24px; }
nav { margin: 0 0 40px; font-size: 14px; }
nav a { color: var(--muted); margin-right: 18px; }
nav a[aria-current] { color: var(--red); font-weight: 600; }
h1 { font-size: 26px; font-weight: 700; margin: 0 0 8px; line-height: 1.3; }
h2 { font-size: 18px; font-weight: 650; margin: 40px 0 8px; }
h3 { font-size: 16px; font-weight: 600; margin: 24px 0 4px; }
.updated { color: var(--muted); font-size: 14px; margin: 0 0 32px; }
a { color: var(--red); }
.lead { font-size: 19px; }
.badge { display: inline-block; margin: 16px 0 8px; }
.badge img { height: 52px; width: auto; display: block; }
.shots { display: flex; gap: 12px; overflow-x: auto; margin: 32px 0; padding-bottom: 8px; }
.shots img { width: 200px; height: auto; border-radius: 18px; border: 1px solid var(--line); flex: none; }
.points { list-style: none; padding: 0; margin: 32px 0; display: grid; gap: 12px; }
.points li { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--red); border-radius: 10px; padding: 14px 16px; }
.points b { display: block; }
.mail { display: inline-block; margin: 8px 0 0; padding: 12px 20px; background: var(--red); color: #fff; border-radius: 8px; text-decoration: none; font-weight: 600; }
.note { color: var(--muted); font-size: 15px; border-left: 3px solid var(--red); padding-left: 14px; }
figure { margin: 32px 0; }
figure img { width: 100%; height: auto; background: #fff; border: 1px solid var(--line); border-radius: 10px; }
figcaption { color: var(--muted); font-size: 14px; margin-top: 8px; }
code { font-size: 14px; background: var(--card); border: 1px solid var(--line); border-radius: 4px; padding: 1px 5px; }
hr { border: 0; border-top: 1px solid var(--line); margin: 56px 0 24px; }
footer { color: var(--muted); font-size: 13px; margin-top: 64px; border-top: 1px solid var(--line); padding-top: 16px; }
footer a { color: var(--muted); }

/* How it works: number strip, inline diagram, folded sections */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; margin: 24px 0 6px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
.stat b { display: block; font-size: 26px; line-height: 1.15; color: var(--red); }
.stat span { font-size: 14px; color: var(--muted); }
.stats-note { color: var(--muted); font-size: 13px; margin: 0 0 8px; }
.diagram { margin: 32px 0 8px; overflow-x: auto; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 8px; }
.diagram svg { display: block; width: 100%; min-width: 600px; height: auto; }
.d-box { fill: var(--card); stroke: var(--text); stroke-width: 1.5; }
.d-key { fill: var(--card); stroke: var(--red); stroke-width: 2; }
.d-paid { fill: var(--line); stroke: var(--red); stroke-width: 1.5; }
.d-opt { fill: var(--card); stroke: var(--muted); stroke-width: 1.5; stroke-dasharray: 5 4; }
.d-t { fill: var(--text); font-size: 14px; font-weight: 700; }
.d-s { fill: var(--muted); font-size: 12px; }
.d-r { fill: var(--red); font-size: 12px; }
.d-arrow { stroke: var(--text); stroke-width: 1.6; fill: none; }
.d-arrow-opt { stroke: var(--muted); stroke-width: 1.6; stroke-dasharray: 5 4; fill: none; }
.d-rule { stroke: var(--red); stroke-width: 2; fill: none; }
.d-rule-dash { stroke: var(--red); stroke-width: 2; stroke-dasharray: 3 5; fill: none; }
.d-stop { fill: var(--card); stroke: var(--red); stroke-width: 2; }
.d-head { fill: var(--text); }
details.fold { background: var(--card); border: 1px solid var(--line); border-radius: 10px; margin: 12px 0 0; }
details.fold > summary { cursor: pointer; list-style: none; padding: 14px 16px; }
details.fold > summary::-webkit-details-marker { display: none; }
details.fold > summary h2 { margin: 0 0 4px; }
details.fold > summary p { margin: 0; color: var(--muted); font-size: 15px; }
details.fold > summary::after { content: "Read more +"; display: block; margin-top: 6px; font-size: 13px; color: var(--red); font-weight: 600; }
details.fold[open] > summary::after { content: "Close −"; }
[lang="tr"] details.fold > summary::after { content: "Devamı +"; }
[lang="tr"] details.fold[open] > summary::after { content: "Kapat −"; }
details.fold > .more { padding: 4px 16px 6px; border-top: 1px solid var(--line); }