:root { color-scheme: light dark; --brand: #2563eb; --brand-dark: #1d4ed8; }
* { box-sizing: border-box; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  margin: 0; line-height: 1.7; color: #0f172a; background: #ffffff;
}
a { color: var(--brand); }
header.site {
  border-bottom: 1px solid #e2e8f0;
  position: sticky; top: 0; background: rgba(255,255,255,.85); backdrop-filter: blur(8px);
}
header.site .in {
  max-width: 760px; margin: 0 auto; padding: .75rem 1.25rem;
  display: flex; align-items: center; gap: .6rem;
}
/* Gerçek eb logosu; koyu zeminde kaybolmasın diye beyaz rozet içinde */
.logo {
  height: 34px; border-radius: 9px; flex: none; padding: 5px 7px;
  background: #fff; border: 1px solid rgba(15, 23, 42, .12);
  display: grid; place-items: center; text-decoration: none;
}
.logo img { height: 22px; width: auto; display: block; }
.brand { font-weight: 700; letter-spacing: -.01em; color: inherit; text-decoration: none; }

/* Dil anahtarı */
.langtoggle { margin-left: auto; display: inline-flex; gap: 2px; border: 1px solid #e2e8f0; border-radius: 8px; padding: 2px; }
.langtoggle button {
  font: inherit; font-size: .78rem; font-weight: 600; cursor: pointer;
  border: 0; background: transparent; color: #64748b; border-radius: 6px; padding: .2rem .5rem;
}
.langtoggle button.active { background: var(--brand); color: #fff; }
@media (prefers-color-scheme: dark) { .langtoggle { border-color: #334155; } }

/* İki dilli içerik: JS gelene kadar gizli; aktif dil gösterilir (FOUC yok) */
[data-lang] { display: none; }
[data-lang].is-active { display: block; }
.no-js [data-lang] { display: block; }
main { max-width: 760px; margin: 0 auto; padding: 2.5rem 1.25rem 4rem; }
h1 { font-size: 1.9rem; letter-spacing: -.02em; margin: 0 0 .25rem; }
.updated { color: #64748b; font-size: .9rem; margin: 0 0 2rem; }
h2 { font-size: 1.2rem; margin: 2.25rem 0 .5rem; }
h3 { font-size: 1.02rem; margin: 1.5rem 0 .35rem; }
p, li { color: #334155; }
ul { padding-left: 1.25rem; }
li { margin: .3rem 0; }
.note {
  background: #eff6ff; border: 1px solid #bfdbfe; border-radius: 12px;
  padding: 1rem 1.15rem; margin: 1.5rem 0; font-size: .95rem;
}
.fill { background: #fef9c3; padding: 0 .25rem; border-radius: 3px; }
footer.site {
  border-top: 1px solid #e2e8f0; color: #64748b; font-size: .9rem;
}
footer.site .in {
  max-width: 760px; margin: 0 auto; padding: 1.5rem 1.25rem;
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between;
}
footer.site nav { display: flex; gap: 1.15rem; flex-wrap: wrap; }
footer.site a { color: #64748b; text-decoration: none; }
footer.site a:hover { color: var(--brand); }
@media (prefers-color-scheme: dark) {
  body { background: #0b0d12; color: #e5e7eb; }
  header.site { background: rgba(11,13,18,.85); border-color: #1e293b; }
  footer.site { border-color: #1e293b; color: #94a3b8; }
  p, li { color: #cbd5e1; }
  .updated { color: #94a3b8; }
  .note { background: #0f1b34; border-color: #1e3a8a; }
  .fill { background: #3f3f1a; }
  .logo { border-color: rgba(255, 255, 255, .18); }
  footer.site a { color: #94a3b8; }
}