:root{
      --bg:#ffffff;
      --surface:#f8fafc;
      --blue:#4682B4;
      --green:#007FFF;
      --orange:#f59e0b;
      --text:#0f172a;
      --muted:#64748b;
      --border:#e5e7eb;
      --h2-dark:#1f2933; /* koyu volkanik gri */
    }
    *{box-sizing:border-box;margin:0;padding:0}
    body{font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial;background:var(--bg);color:var(--text);line-height:1.7}
    .container{max-width:1100px;margin:auto;padding:20px}

    /* HEADER */
    header{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
    .logo{font-weight:800;font-size:22px;color:var(--blue)}
    nav{display:flex;gap:14px;align-items:center}
    nav a{color:var(--blue);text-decoration:none;font-weight:700}
    nav a:hover{color:var(--orange)}


    /* MOBILE MENU */
    .menu-btn{display:none;background:none;border:none;font-size:26px}
    .mobile-nav{display:none;flex-direction:column;background:var(--surface);padding:10px 0;border-radius:14px;margin-top:10px;border:1px solid var(--border)}
    .mobile-nav a{color:var(--blue);text-decoration:none;font-weight:700;padding:12px 16px}
    .mobile-nav a:hover{color:var(--orange);background:#ffffff}
    .mobile-nav a + a{border-top:1px solid var(--border)}

/* HERO */
.hero{padding:40px 0 20px 0}
h1{font-size:42px;line-height:1.2;margin-bottom:12px;color:#4682B4}
.lead{color:var(--muted);max-width:700px}
.cta{margin-top:18px;display:flex;gap:10px}
.btn{padding:12px 18px;border-radius:10px;border:none;font-weight:700;cursor:pointer}
.btn-primary{background:#FF6347;color:var(--bg);border:0px solid var(--border)}
.btn-ghost{background:#32CD32;color:var(--bg);border:0px solid var(--border)}

/* SADECE MASAÜSTÜ */
@media (min-width:901px){
  .hero{
    max-width:80%;
    margin-left:auto;
    margin-right:auto;
  }
}


/* ARTICLE */
.article{
  margin-top:40px;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:18px;
  padding:28px
}
.article h2{margin-bottom:10px;font-size:28px;color:#1E2952;line-height:1.25}
.article h3{margin-top:14px;margin-bottom:6px;color:var(--green);line-height:1.25}
.article p{margin-bottom:18px;color:#334155}
.article ul{margin:10px 0 18px 18px;padding-left:10px}
.article li{margin-bottom:8px;color:#334155}
.article li::marker{color:var(--green)}
.article .article-image{margin:14px 0 18px 0;border-radius:14px;overflow:hidden;border:1px solid var(--border)}
.article .article-image img{width:100%;height:auto;display:block}

/* SADECE MASAÜSTÜ */
@media (min-width:901px){
  .article{
    max-width:80%;
    margin-left:auto;
    margin-right:auto;
  }
}


    /* FEATURES */
    .features{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:28px}
    .feature{background:#ffffff;border:1px solid var(--border);padding:18px;border-radius:14px}
    .feature h3{margin-bottom:6px;color:var(--blue)}

    /* FAQ */
    .faq-section{margin-top:40px}
    .faq-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:22px;align-items:stretch}
    .faq-image{border:1px solid var(--border);border-radius:16px;overflow:hidden;background:#ffffff}
    .faq-image img{width:100%;height:100%;object-fit:cover;display:block}
    .faq-box{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:20px}
    .faq-box h2{color:var(--h2-dark);margin-bottom:10px}
    .faq-item{margin-bottom:12px}
    .faq-q{font-weight:700;color:var(--blue);margin-bottom:4px}
    .faq-a{color:#334155}

    footer{margin-top:40px;color:var(--muted);font-size:14px}

/* RESPONSIVE */
@media (max-width:900px){
  nav{display:none}
  .menu-btn{display:block}
  .features{grid-template-columns:1fr}
  h1{font-size:32px}
  .faq-grid{grid-template-columns:1fr}
}

/* ================= toc ================= */

.my-float{
    margin-top:16px;
}

#toc {
    border: 1px solid #ddd;
    padding: 10px;
    margin-bottom: 20px;
    background-color: #f9f9f9;
}

/* "İçindekiler" başlığı için özel stil */
#toc h2 {
    margin-top: 0;
    font-size: 18px; /* Başlığın font boyutu */
    font-weight: bold;
}

/* Liste genel stili */
#toc ul {
    list-style-type: none;
    padding-left: 0;
}

/* Liste öğeleri için stil */
#toc ul li {
    margin-bottom: 5px;
    font-size: 14px; /* Liste öğelerinin font boyutu */
}

/* h3 başlıklarını içe kaydır */
#toc ul li.h3 {
    margin-left: 20px;
    font-size: 13px; /* h3 başlıklarının font boyutu */
}

/* h4 başlıklarını daha fazla içe kaydır ve farklı font boyutu ver */
#toc ul li.h4 {
    margin-left: 40px;
    font-size: 12px; /* h4 başlıklarının font boyutu */
}

/* Bağlantılar için stil */
#toc a {
    text-decoration: none;
    color: #0073e6;
    font-size: inherit; /* Üst öğeden font boyutunu alır */
}

/* Bağlantı üzerine gelinceki stil */
#toc a:hover {
    text-decoration: underline;
}

/* Toggle cursor */
#toc h2 {
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Ok ikonu */
#toc h2::after {
    content: "▼";
    font-size: 12px;
    transition: transform 0.3s ease;
}

/* Kapalıyken liste gizli */
#toc.closed ul {
    display: none;
}

/* Kapalıyken oku döndür */
#toc.closed h2::after {
    transform: rotate(-90deg);
}

/* === MOBIL MENU FIX (KAYMA YOK) === */

@media (max-width:900px){

.mobile-nav{
  position:fixed;
  top:80px;          /* header yüksekliği */
  left:0;
  right:0;
  margin:0;
  display:none;
  z-index:999;
}

}

/* DESKTOP SUB MENU */
.has-sub{position:relative;display:flex;align-items:center}
.sub-menu{
  display:none;
  position:absolute;
  top:28px;
  left:0;
  background:var(--surface);
  border:0px solid var(--border);
  border-radius:10px;
  padding:6px 0;
  min-width:160px;
  flex-direction:column;
}
.sub-menu a{
  padding:8px 14px;
  display:block;
  white-space:nowrap;
}
.has-sub:hover .sub-menu{display:flex}

/* MOBILE SUB MENU */
.has-sub-mobile span{
  display:block;
  padding:12px 16px;
  font-weight:700;
  color:var(--blue);
  cursor:pointer;
}
.sub-menu-mobile{display:none;flex-direction:column}
.sub-menu-mobile a{padding-left:28px}
.sub-menu-mobile.open{display:flex}

/* Submenu olan item'a ok */
.has-sub > a::after{
  content:"▾";
  font-size:12px;
  margin-left:6px;
}

.has-sub-mobile > span::after{
  content:"▾";
  float:right;
  font-size:12px;
}

/* === MOBIL MENU FIX (KENARLARA TAM DAYANMASIN) === */
@media (max-width:900px){
  .mobile-nav{
    position:fixed;
    top:80px;                 /* header yüksekliği */
    left:16px;                /* soldan boşluk */
    right:16px;