:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel-2: #1c2430;
  --fg: #e6edf3;
  --muted: #9aa4b2;
  --accent: #4c8dff;
  --accent-soft: rgba(76, 141, 255, .12);
  --border: #262d36;
  --maxw: 900px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --panel: #f6f8fa;
    --panel-2: #eef2f6;
    --fg: #1f2328;
    --muted: #57606a;
    --accent: #0b62d6;
    --accent-soft: rgba(11, 98, 214, .08);
    --border: #d8dee4;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.7 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 1rem; top: 1rem;
  background: var(--accent); color: #fff;
  padding: .6rem 1rem; border-radius: 6px; z-index: 10;
}

/* ---------- header ---------- */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.brand {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: .07em;
  color: var(--fg);
  text-decoration: none;
  white-space: nowrap;
}
.brand span {
  font-weight: 400;
  color: var(--muted);
  margin-left: .4rem;
  letter-spacing: normal;
}

nav { display: flex; flex-wrap: wrap; gap: 1rem; }
nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: .95rem;
}
nav a:hover { color: var(--fg); }
nav a[aria-current="page"] { color: var(--fg); font-weight: 600; }

/* ---------- layout ---------- */
main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 1rem;
}

h1 {
  font-size: clamp(1.9rem, 5vw, 2.8rem);
  line-height: 1.15;
  letter-spacing: -.02em;
  margin: 0 0 1.25rem;
}
h2 {
  font-size: 1.4rem;
  letter-spacing: -.01em;
  margin: 2.5rem 0 .9rem;
}
h3 { font-size: 1.05rem; margin: 0 0 .4rem; }

p { margin: 0 0 1rem; }
.lead { font-size: 1.12rem; color: var(--muted); max-width: 42rem; }

a { color: var(--accent); }

ul, ol { color: var(--muted); padding-left: 1.2rem; }
ul li, ol li { margin-bottom: .4rem; }
ol strong, ul strong { color: var(--fg); }

/* ---------- ozet blogu (GEO: alintilanabilir TL;DR) ---------- */
.summary {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  padding: 1rem 1.25rem;
  margin: 0 0 2rem;
}
.summary-label {
  display: inline-block;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .35rem;
}
.summary p { margin: 0; color: var(--fg); }

/* ---------- icindekiler ---------- */
.toc {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  margin: 0 0 2.5rem;
}
.toc h2 { font-size: .95rem; margin: 0 0 .6rem; color: var(--muted); }
.toc ol { margin: 0; color: var(--muted); }
.toc li { margin-bottom: .25rem; }

section { scroll-margin-top: 1rem; }

/* ---------- kunye / bilgi kutusu ---------- */
.factbox {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.75rem;
  margin: 3rem 0 1rem;
}
.factbox h2 { margin-top: 0; }
.definition { color: var(--fg); }

dl.facts { margin: 1.25rem 0 0; display: grid; gap: 0; }
dl.facts > div {
  display: grid;
  grid-template-columns: minmax(140px, 34%) 1fr;
  gap: 1rem;
  padding: .65rem 0;
  border-top: 1px solid var(--border);
}
dl.facts > div:first-child { border-top: 0; }
dl.facts dt { color: var(--muted); font-size: .92rem; }
dl.facts dd { margin: 0; color: var(--fg); }

@media (max-width: 560px) {
  dl.facts > div { grid-template-columns: 1fr; gap: .15rem; }
}

.disambig {
  margin: 1.5rem 0 0;
  padding: .9rem 1.1rem;
  background: var(--panel-2);
  border-radius: 8px;
  color: var(--muted);
  font-size: .93rem;
}
.disambig strong { color: var(--fg); }

.callout {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.15rem;
  color: var(--muted);
}
.callout strong { color: var(--fg); }

/* ---------- grid kartlari ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
  margin: 1.25rem 0;
}
.grid article {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.35rem;
}
.grid article h3 a { text-decoration: none; }
.grid article h3 a:hover { text-decoration: underline; }
.grid p { color: var(--muted); margin: 0; font-size: .95rem; }

/* ---------- SSS ---------- */
.faq details {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel);
  padding: 1rem 1.25rem;
  margin-bottom: .75rem;
}
.faq summary {
  cursor: pointer;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary h3 { display: inline; }
.faq details p { color: var(--muted); margin: .75rem 0 0; }

/* ---------- cta ---------- */
.cta {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  padding: .75rem 1.4rem;
  border-radius: 8px;
}
.cta:hover { filter: brightness(1.1); }

/* ---------- footer ---------- */
footer {
  max-width: var(--maxw);
  margin: 3rem auto 0;
  padding: 1.75rem 1.25rem 3rem;
  color: var(--muted);
  font-size: .9rem;
  border-top: 1px solid var(--border);
}
footer p { margin: 0 0 .35rem; }
.legal { font-size: .82rem; opacity: .8; }