/* ============================================================
   Bilişim Dostu — Genel Site Stili
   ============================================================ */

:root{
  --brand:        #2757c7;
  --brand-dark:   #1c3f96;
  --brand-light:  #eaf0fd;
  --grade5:       #1a8f5e;
  --grade5-bg:    #e7f6ef;
  --grade6:       #b3620a;
  --grade6-bg:    #fbf0e0;
  --announce:     #b3244e;
  --announce-bg:  #fbe8ef;
  --ink:          #182233;
  --muted:        #5b6579;
  --line:         #e3e7f0;
  --bg:           #f6f7fb;
  --card:         #ffffff;
  --radius:       14px;
  --shadow:       0 6px 24px rgba(24,34,51,.06);
  --shadow-hover: 0 14px 32px rgba(24,34,51,.12);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1120px;margin:0 auto;padding:0 20px}

/* ---------- Header ---------- */
.site-header{
  background:#fff;
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:50;
}
.site-header .container{
  display:flex;align-items:center;justify-content:space-between;
  padding-top:14px;padding-bottom:14px;gap:20px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.25rem;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand .logo-mark{
  width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--brand),#5b8dfb);
  display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:1.1rem;
  flex:none;
}
.brand img.logo-img{width:38px;height:38px;border-radius:10px;object-fit:cover;flex:none}
.brand small{display:block;font-weight:500;font-size:.72rem;color:var(--muted)}

nav.main-nav{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
nav.main-nav a{
  color:var(--ink);font-weight:600;font-size:.92rem;padding:9px 14px;border-radius:9px;
}
nav.main-nav a:hover,nav.main-nav a.active{background:var(--brand-light);color:var(--brand-dark);text-decoration:none}
.nav-search-btn{
  border:1px solid var(--line);background:#fff;border-radius:9px;padding:9px 12px;
  color:var(--muted);font-weight:600;cursor:pointer;font-size:.9rem;
}
.nav-search-btn:hover{border-color:var(--brand);color:var(--brand)}
.menu-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:8px 11px;font-size:1.1rem;cursor:pointer}

@media (max-width:860px){
  nav.main-nav{
    display:none;flex-direction:column;align-items:stretch;width:100%;
    position:absolute;top:100%;left:0;background:#fff;border-bottom:1px solid var(--line);
    padding:8px 20px 16px;box-shadow:var(--shadow);
  }
  nav.main-nav.open{display:flex}
  .menu-toggle{display:inline-block}
  .site-header .container{position:relative;flex-wrap:wrap}
}

/* ---------- Hero ---------- */
.hero{
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-dark) 100%);
  color:#fff;padding:56px 0 64px;
}
.hero h1{font-size:2.1rem;margin:0 0 10px;font-weight:800;max-width:720px;text-shadow:0 1px 3px rgba(0,0,0,.25)}
.hero p{font-size:1.05rem;color:#dbe4fd;max-width:600px;margin:0 0 22px;text-shadow:0 1px 3px rgba(0,0,0,.25)}
.hero-cats{display:flex;gap:12px;flex-wrap:wrap}
.hero-cats a{
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.35);color:#fff;
  padding:9px 16px;border-radius:999px;font-weight:600;font-size:.9rem;
}
.hero-cats a:hover{background:rgba(255,255,255,.26);text-decoration:none}

/* ---------- Section headings ---------- */
.section{padding:44px 0}
.section-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:22px;gap:16px;flex-wrap:wrap}
.section-head h2{font-size:1.4rem;margin:0}
.section-head a.see-all{font-weight:600;font-size:.9rem}

/* ---------- Article grid & cards ---------- */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media (max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:620px){.grid{grid-template-columns:1fr}}

.card{
  background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);
  display:flex;flex-direction:column;transition:box-shadow .18s ease,transform .18s ease;
}
.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.card .thumb{
  aspect-ratio:16/9;background:var(--brand-light) url('data:image/svg+xml;utf8,') center/cover;
  display:flex;align-items:center;justify-content:center;color:var(--brand);font-size:2rem;font-weight:800;
}
.card .thumb img{width:100%;height:100%;object-fit:cover}
.card .body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.badge{
  display:inline-flex;align-items:center;gap:5px;font-size:.72rem;font-weight:700;letter-spacing:.02em;
  padding:4px 10px;border-radius:999px;text-transform:uppercase;width:fit-content;
}
.badge-grade5{background:var(--grade5-bg);color:var(--grade5)}
.badge-grade6{background:var(--grade6-bg);color:var(--grade6)}
.badge-announcement{background:var(--announce-bg);color:var(--announce)}
.badge-default{background:var(--brand-light);color:var(--brand-dark)}
/* Kullanıcının panelden eklediği özel kategori türleri için otomatik renk paleti */
.badge-c1{background:#f1e9fb;color:#6b3fb8}
.badge-c2{background:#e2f6f6;color:#0c6363}
.badge-c3{background:#e4e9fc;color:#3a4bc9}
.badge-c4{background:#fdf1de;color:#8a5a0a}
.badge-c5{background:#e2f4fb;color:#146e94}
.badge-c6{background:#eef1f5;color:#465066}
.card h3{margin:0;font-size:1.06rem;line-height:1.4}
.card h3 a{color:var(--ink)}
.card h3 a:hover{color:var(--brand);text-decoration:none}
.card p.excerpt{color:var(--muted);font-size:.9rem;margin:0;flex:1}
.card .meta{color:var(--muted);font-size:.8rem;display:flex;gap:10px;align-items:center;margin-top:4px}

.empty-state{
  background:#fff;border:1px dashed var(--line);border-radius:var(--radius);
  padding:40px;text-align:center;color:var(--muted);
}

/* ---------- Category header bar ---------- */
.cat-hero{padding:40px 0 26px;border-bottom:1px solid var(--line);background:#fff}
.cat-hero h1{margin:8px 0 6px;font-size:1.7rem}
.cat-hero p{color:var(--muted);margin:0;max-width:640px}

/* ---------- Pagination ---------- */
.pagination{display:flex;gap:8px;justify-content:center;margin-top:34px;flex-wrap:wrap}
.pagination a,.pagination span{
  min-width:38px;text-align:center;padding:8px 12px;border-radius:8px;border:1px solid var(--line);
  font-weight:600;font-size:.9rem;color:var(--ink);background:#fff;
}
.pagination a:hover{border-color:var(--brand);color:var(--brand);text-decoration:none}
.pagination .current{background:var(--brand);border-color:var(--brand);color:#fff}
.pagination .disabled{opacity:.4;pointer-events:none}

/* ---------- Single article ---------- */
.article-header{background:#fff;border-bottom:1px solid var(--line);padding:36px 0}
.article-header h1{font-size:1.9rem;margin:14px 0 12px;line-height:1.3}
.article-meta{display:flex;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:.9rem;align-items:center}
.btn-pdf{
  display:inline-flex;align-items:center;gap:8px;margin-top:18px;padding:10px 18px;
  background:var(--brand);color:#fff;font-weight:700;font-size:.92rem;border-radius:9px;
  text-decoration:none;
}
.btn-pdf:hover{background:var(--brand-dark);text-decoration:none}
/* Editördeki görünmez "PDF sınırı" işaretçisi: yayınlanan sitede hiç görünmesin. */
.pdf-sinir{display:none}
/* Makale metniyle (article-body) aynı genişlikte olsun diye 800px — başlığın
   bulunduğu daha geniş üst alanla (1120px) aynı hizada değil, kasıtlı olarak. */
.article-featured{max-width:800px;margin:0 auto;padding:0 20px;margin-top:-1px}
.article-featured img{width:100%;height:auto;border-radius:var(--radius);margin-top:26px;box-shadow:var(--shadow)}

.article-body{
  max-width:800px;margin:0 auto;padding:34px 20px 10px;font-size:1.06rem;
}
.article-body h2{font-size:1.4rem;margin:34px 0 14px;color:var(--ink)}
.article-body h3{font-size:1.18rem;margin:28px 0 12px}
.article-body p{margin:0 0 18px}
.article-body img{max-width:100% !important;height:auto !important;border-radius:10px;margin:18px auto;box-shadow:var(--shadow)}
.article-body figure{margin:22px 0}
.article-body figcaption{text-align:center;color:var(--muted);font-size:.85rem;margin-top:8px}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:26px}
.article-body li{margin-bottom:6px}
.article-body blockquote{
  border-left:4px solid var(--brand);margin:22px 0;padding:6px 20px;background:var(--brand-light);
  border-radius:0 10px 10px 0;
}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:.95rem;overflow-x:auto;display:block}
.article-body table th,.article-body table td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.article-body table th{background:var(--brand-light);color:var(--brand-dark)}
.article-body .mce-video-wrapper,.article-body iframe{
  max-width:100%;border-radius:10px;margin:20px 0;
}
.article-body .video-embed{position:relative;padding-top:56.25%;height:0;border-radius:10px;overflow:hidden;margin:22px 0;box-shadow:var(--shadow)}
.article-body .video-embed iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:0;margin:0}
.article-body pre{background:#182233;color:#e6ebfa;padding:16px;border-radius:10px;overflow-x:auto}
.article-body code{background:var(--brand-light);padding:2px 6px;border-radius:4px;font-size:.9em}
.article-body pre code{background:none;padding:0;color:inherit}

.article-footer{max-width:800px;margin:26px auto 0;padding:20px 20px 0;border-top:1px solid var(--line)}

.related{background:#fff;border-top:1px solid var(--line);padding:40px 0 50px}

/* ---------- Search ---------- */
.search-box{max-width:640px;margin:0 auto 30px}
.search-box form{display:flex;gap:10px}
.search-box input[type=text]{
  flex:1;padding:13px 16px;border:1px solid var(--line);border-radius:10px;font-size:1rem;
}
.search-box button{
  padding:0 22px;background:var(--brand);color:#fff;border:none;border-radius:10px;font-weight:700;cursor:pointer;
}
.search-box button:hover{background:var(--brand-dark)}
.search-overlay{
  position:fixed;inset:0;background:rgba(24,34,51,.5);display:none;align-items:flex-start;
  justify-content:center;padding-top:12vh;z-index:100;
}
.search-overlay.open{display:flex}
.search-overlay .box{background:#fff;border-radius:14px;padding:22px;width:92%;max-width:560px;box-shadow:0 20px 60px rgba(0,0,0,.25)}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:#c6cde0;margin-top:60px;padding:46px 0 30px;border-top:3px solid var(--brand)}
.site-footer a{color:#c6cde0;transition:color .15s}
.site-footer a:hover{color:#fff;text-decoration:underline}
/* Grid, sütunları konteyner genişliğine eşit şekilde yayar (masaüstünde 3 eşit
   sütun) ve mobilde tek bir media query ile tam olarak 1'er sütun alt alta
   dizilmesini sağlar — flex ile "gap" kullanınca içerik konteynerin solunda
   toplanıp sağda boşluk kalıyordu, grid bunu düzeltiyor. */
.site-footer .cols{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
@media (max-width:640px){.site-footer .cols{grid-template-columns:1fr;gap:28px}}
.site-footer h4{
  color:#fff;font-size:.85rem;margin:0 0 16px;padding-bottom:10px;text-transform:uppercase;
  letter-spacing:.06em;border-bottom:2px solid rgba(255,255,255,.14);
}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin-bottom:10px;font-size:.92rem;line-height:1.4}
.site-footer .bottom{
  border-top:1px solid rgba(255,255,255,.1);margin-top:34px;padding-top:18px;
  font-size:.82rem;color:#8b93a8;text-align:center;
}
.footer-legal{margin-top:6px}
.footer-legal a{font-size:.82rem}

/* ---------- Flash / alerts ---------- */
.flash{padding:12px 16px;border-radius:10px;margin-bottom:20px;font-size:.92rem}
.flash-success{background:#e8f7ef;color:#1a8f5e}
.flash-error{background:#fdecec;color:#c53030}

/* ---------- 404 ---------- */
.notfound{padding:90px 0;text-align:center}
.notfound h1{font-size:4rem;margin:0;color:var(--brand)}
.notfound p{color:var(--muted);font-size:1.1rem}