:root{--brand:#003761;--brand2:#005578;--ink:#0f172a;--muted:#475569;--bg:#f8fafc;--panel:#fff;--border:#e2e8f0}
/* Reset & base */
*{box-sizing:border-box}
html,body{height:100%}
html{ overflow-y: scroll; } /* scrollbar pop-in/out engelle */
body{margin:0;font-family:'Segoe UI',system-ui,Arial,sans-serif;background:var(--bg);color:var(--ink)}

/* HEADER */
.site-header{
  position:sticky; top:0; z-index:20;
  background:linear-gradient(90deg,var(--brand),var(--brand2));
  color:#fff; border-bottom:1px solid rgba(255,255,255,.15)
}
.site-header .wrap{
  max-width:1200px; margin:0 auto; padding:.6rem 1rem;
  display:flex; align-items:center; gap:1rem;
  flex-wrap:wrap;
}
.brand{display:flex;align-items:center;gap:.6rem}
.logo-sw,.logo-app{height:28px}
.brand strong{font-weight:800;letter-spacing:.2px}
.divider{width:1px;height:24px;background:rgba(255,255,255,.35)}

/* LANG */
.lang{display:flex;gap:.35rem; margin-left:0;}
.btn-lang{
  border:1px solid rgba(255,255,255,.5);
  background:rgba(255,255,255,.15);
  color:#fff; border-radius:.5rem; padding:.25rem .5rem; cursor:pointer
}
.btn-lang.active{background:#fff;color:#003761;font-weight:700}

/* SEARCH (ortada esner) */
.searchbar{
  position:relative;
  flex:1;
  min-width:260px;
  max-width:520px;
  margin:0 1rem 0;
}
.searchbar input{
  width:100%;
  border:1px solid var(--border,#e5e7eb);
  padding:.55rem .75rem;
  border-radius:.6rem;
  font-size:.95rem;
  outline:none;
}
.searchbar input:focus{
  box-shadow:0 0 0 3px rgba(59,130,246,.15);
  border-color:#93c5fd;
}
.search-results{
  position:absolute; left:0; right:0; top: calc(100% + 6px);
  background:#fff; border:1px solid var(--border,#e5e7eb);
  border-radius:.6rem; box-shadow:0 6px 20px rgba(0,0,0,.08);
  display:none; max-height: 60vh; overflow:auto; z-index:50;
}
.search-results .item{
  padding:.55rem .7rem; cursor:pointer; line-height:1.25rem;
  display:flex; gap:.6rem; align-items:flex-start;
}
.search-results .item:hover,.search-results .item.active{background:#f8fafc}
.search-results .id{font-weight:700;color:#0f172a}
.search-results .cat{font-size:.78rem;color:#64748b;margin-left:auto}
.search-results .desc{font-size:.85rem;color:#334155;margin-top:.15rem}
.search-results .hl{background:#fff4cc}


.actions{display:flex;gap:.4rem}
.btn{border:1px solid rgba(255,255,255,.5);background:transparent;color:#fff;border-radius:.6rem;padding:.45rem .7rem;display:flex;align-items:center;gap:.4rem;cursor:pointer;text-decoration:none}
.btn svg{width:18px;height:18px;fill:currentColor}
/* LAYOUT */
.main{
  max-width:1200px; margin:1rem auto;
  display:grid; grid-template-columns:280px 1fr;
  gap:1rem; padding:0 1rem
}
.sidebar{
  background:var(--panel); border:1px solid var(--border); border-radius:12px;
  padding:1rem; height:calc(100vh - 140px);
  position:sticky; top:90px; overflow:auto
}
.sidebar h3{margin:0 0 .6rem 0;color:var(--muted);font-size:.95rem}
.tree{display:flex;flex-direction:column;gap:.35rem}
.tree-link{
  display:block; padding:.4rem .6rem;
  border:1px solid var(--border); border-radius:.5rem;
  background:#fff; text-decoration:none; color:#0f172a
}
details{border:1px solid var(--border);border-radius:.6rem;background:#fff}
summary{padding:.5rem .6rem;cursor:pointer;font-weight:600;color:#0f172a}
.group{padding:.35rem .5rem .6rem .5rem;display:flex;flex-direction:column;gap:.15rem}
.group a{padding:.35rem .5rem;border-radius:.4rem;text-decoration:none;color:#0f172a}
.group a:hover{background:#eef2ff}

/* CONTENT */
.content{
  background:var(--panel); border:1px solid var(--border);
  border-radius:12px; padding:1rem;
  min-height:calc(100vh - 120px);
}
.content h2{margin:0 0 .2rem 0}
.kicker{color:#64748b;font-weight:600;margin:0 0 .8rem 0}

/* Video alanı */
.video{margin:.8rem 0;border:1px solid var(--border);border-radius:12px;overflow:hidden;background:#0b1220; min-height:320px;}
.video audio,.video video{width:100%;display:block}
.video .fallback{color:#e2e8f0;background:#0b1220;padding:.6rem;text-align:center}
#workflow .video, #workflow2 .video{ min-height:0; } /* workflow’da boşluk bırakma */

/* Article kart görünümü */
.content article.card{
  background:#fff; border:1px solid var(--border,#e5e7eb);
  border-radius:.75rem; padding:1rem 1.25rem;
  box-shadow:0 1px 0 rgba(0,0,0,.02); margin-top:1.5rem;
}
.content article h2{ margin:0 0 .75rem; line-height:1.2; }
.content article h3{ margin:1rem 0 .5rem; }
.content article h4{ margin:1rem 0 .35rem; }

/* Dil bloklarında ufak layout düzeltisi */
#workflow [data-lang], #workflow2 [data-lang]{ padding-top:.01px; }

/* FOOTER */
.footer{margin:1.5rem 0 2rem;text-align:center;color:#64748b}

/* RESPONSIVE */
@media (max-width: 980px){
  .main{ grid-template-columns:1fr; }
  .sidebar{ position:static; height:auto; }
}
@media (max-width: 900px){
  .site-header .wrap{ gap:.6rem; }
  .actions{ order:3; width:100%; justify-content:flex-end; }
  .lang{ order:2; }
  .searchbar{ order:1; flex-basis:100%; max-width:none; }
}