/* ===== Design tokens ===== */
:root{
  --ink:#0B1220;
  --ink-soft:#151F30;
  --paper:#F6F7F9;
  --card:#FFFFFF;
  --slate:#45505E;
  --slate-light:#7A8494;
  --signal:#12B5B0;
  --signal-dark:#0C8A86;
  --amber:#F2A93B;
  --line:#E2E5EA;
  --radius:10px;
  --font-display:'Sora',system-ui,sans-serif;
  --font-body:'Inter',system-ui,sans-serif;
  --font-mono:'JetBrains Mono',monospace;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{font-family:var(--font-display);margin:0 0 .5em;line-height:1.2;letter-spacing:-0.01em;}
p{margin:0 0 1em;}
.container{max-width:1120px;margin:0 auto;padding:0 24px;}
@media(prefers-reduced-motion: reduce){*{animation:none !important;transition:none !important;}}

/* eyebrow / mono label */
.eyebrow{
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:var(--signal-dark);
  display:inline-flex;align-items:center;gap:8px;
}
.eyebrow::before{content:'';width:8px;height:8px;border-radius:50%;background:var(--signal);box-shadow:0 0 0 3px rgba(18,181,176,.15);}

/* ===== Header ===== */
.site-header{
  background:var(--ink);
  color:#fff;
  position:sticky;top:0;z-index:50;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.site-header .inner{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 24px;max-width:1120px;margin:0 auto;
}
.brand{font-family:var(--font-display);font-weight:700;font-size:1.15rem;color:#fff;display:flex;align-items:center;gap:10px;}
.brand .dot{color:var(--signal);font-family:var(--font-mono);}
.brand small{display:block;font-family:var(--font-mono);font-weight:400;font-size:.7rem;color:var(--slate-light);letter-spacing:.03em;}
nav.main-nav{display:flex;gap:28px;align-items:center;}
nav.main-nav a{font-size:.92rem;color:#D8DCE3;font-weight:500;transition:color .15s;}
nav.main-nav a:hover, nav.main-nav a.active{color:var(--signal);}
.nav-cta{
  background:var(--signal);color:var(--ink) !important;
  padding:8px 16px;border-radius:6px;font-weight:600 !important;
  display:flex;align-items:center;gap:6px;
}
.nav-cta:hover{background:var(--amber) !important;}
.menu-toggle{display:none;background:none;border:0;color:#fff;font-size:1.5rem;cursor:pointer;}

@media(max-width:860px){
  nav.main-nav{
    position:absolute;top:100%;left:0;right:0;background:var(--ink);
    flex-direction:column;align-items:flex-start;padding:16px 24px 24px;
    display:none;gap:16px;border-bottom:1px solid rgba(255,255,255,.08);
  }
  nav.main-nav.open{display:flex;}
  .menu-toggle{display:block;}
}

/* ===== Hero (signature element: terminal window) ===== */
.hero{
  background:var(--ink);
  color:#fff;
  padding:64px 0 88px;
  position:relative;
  overflow:hidden;
}
.hero::after{
  content:'';position:absolute;inset:0;
  background-image:radial-gradient(circle at 1px 1px, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size:28px 28px;
  pointer-events:none;
}
.hero .inner{
  display:grid;grid-template-columns:1.1fr 1fr;gap:56px;align-items:center;
  position:relative;z-index:1;
}
@media(max-width:900px){.hero .inner{grid-template-columns:1fr;gap:32px;}}

.hero h1{font-size:2.5rem;color:#fff;margin-top:14px;}
.hero h1 .accent{color:var(--signal);}
.hero p.lead{color:#B9C0CC;font-size:1.05rem;max-width:48ch;}
.hero-actions{display:flex;gap:14px;margin-top:24px;flex-wrap:wrap;}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 22px;border-radius:7px;font-weight:600;font-size:.92rem;
  border:1px solid transparent;cursor:pointer;transition:all .15s;
}
.btn-primary{background:var(--signal);color:var(--ink);}
.btn-primary:hover{background:var(--amber);}
.btn-outline{border-color:rgba(255,255,255,.25);color:#fff;}
.btn-outline:hover{border-color:var(--signal);color:var(--signal);}
.btn-dark{background:var(--ink);color:#fff;}
.btn-dark:hover{background:var(--ink-soft);}

/* terminal window */
.terminal{
  background:#0D1526;border:1px solid rgba(255,255,255,.1);
  border-radius:10px;overflow:hidden;
  box-shadow:0 20px 50px rgba(0,0,0,.4);
  font-family:var(--font-mono);font-size:.85rem;
}
.terminal-bar{
  background:#12192B;padding:10px 14px;display:flex;gap:6px;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.terminal-bar span{width:11px;height:11px;border-radius:50%;display:inline-block;}
.terminal-bar span:nth-child(1){background:#FF5F57;}
.terminal-bar span:nth-child(2){background:#FEBC2E;}
.terminal-bar span:nth-child(3){background:#28C840;}
.terminal-body{padding:20px;min-height:180px;color:#9BE6C9;}
.terminal-body .line{margin-bottom:8px;white-space:pre-wrap;word-break:break-word;}
.terminal-body .prompt{color:var(--signal);}
.terminal-body .out{color:#B9C0CC;}
.terminal-body .cursor{display:inline-block;width:8px;height:1em;background:var(--signal);vertical-align:text-bottom;animation:blink 1s step-end infinite;}
@keyframes blink{50%{opacity:0;}}

/* ===== Section headers ===== */
.section{padding:64px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:32px;flex-wrap:wrap;gap:16px;}
.section-head h2{font-size:1.7rem;}

/* ===== Category filter chips ===== */
.chip-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:36px;}
.chip{
  font-family:var(--font-mono);font-size:.78rem;padding:7px 14px;border-radius:20px;
  border:1px solid var(--line);color:var(--slate);background:#fff;
  display:inline-flex;align-items:center;gap:6px;transition:all .15s;
}
.chip:hover, .chip.active{border-color:var(--signal);color:var(--signal-dark);background:#EAFBFA;}
.chip .n{opacity:.6;}

/* ===== Post grid / cards ===== */
.post-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:26px;}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:transform .15s, box-shadow .15s;display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(11,18,32,.08);}
.card-img{aspect-ratio:16/9;background:linear-gradient(135deg,#0F1B2E,#132234);position:relative;overflow:hidden;}
.card-img img{width:100%;height:100%;object-fit:cover;}
.card-img .ph{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.25);font-family:var(--font-mono);font-size:.75rem;}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.cat-tag{
  font-family:var(--font-mono);font-size:.7rem;text-transform:uppercase;letter-spacing:.04em;
  color:var(--signal-dark);display:inline-flex;align-items:center;gap:6px;width:fit-content;
}
.cat-tag.amber{color:#B4740E;}
.cat-tag .dot{width:6px;height:6px;border-radius:50%;background:currentColor;}
.card-body h3{font-size:1.08rem;}
.card-body h3 a:hover{color:var(--signal-dark);}
.card-meta{font-size:.8rem;color:var(--slate-light);font-family:var(--font-mono);margin-top:auto;padding-top:8px;border-top:1px solid var(--line);}
.card-excerpt{color:var(--slate);font-size:.92rem;}

/* ===== Pagination ===== */
.pagination{display:flex;gap:8px;justify-content:center;margin-top:44px;}
.pagination a, .pagination span{
  font-family:var(--font-mono);font-size:.85rem;padding:8px 14px;border-radius:6px;
  border:1px solid var(--line);color:var(--slate);
}
.pagination a:hover{border-color:var(--signal);color:var(--signal-dark);}
.pagination .active{background:var(--ink);color:#fff;border-color:var(--ink);}

/* ===== Single post ===== */
.post-hero{background:var(--ink);color:#fff;padding:48px 0 40px;}
.post-hero .cat-tag{color:var(--signal);}
.post-hero h1{color:#fff;font-size:2.1rem;margin-top:10px;}
.post-hero .meta{font-family:var(--font-mono);font-size:.85rem;color:var(--slate-light);margin-top:14px;}
.post-cover{max-width:1120px;margin:-40px auto 0;padding:0 24px;}
.post-cover img{border-radius:12px;box-shadow:0 20px 40px rgba(0,0,0,.15);}
.post-content{max-width:760px;margin:0 auto;padding:48px 24px 0;font-size:1.05rem;color:#242C38;}
.post-content h2{font-size:1.5rem;margin-top:1.6em;}
.post-content h3{font-size:1.2rem;margin-top:1.4em;}
.post-content p{margin-bottom:1.2em;}
.post-content pre{background:var(--ink);color:#9BE6C9;padding:18px;border-radius:8px;overflow-x:auto;font-family:var(--font-mono);font-size:.85rem;}
.post-content code{background:#EEF1F5;padding:2px 6px;border-radius:4px;font-family:var(--font-mono);font-size:.9em;}
.post-content pre code{background:none;padding:0;}
.post-content img{border-radius:8px;margin:1.4em 0;}
.post-content blockquote{border-left:3px solid var(--signal);padding-left:18px;color:var(--slate);font-style:italic;margin:1.4em 0;}
.post-content ul,.post-content ol{padding-left:1.4em;margin-bottom:1.2em;}
.post-footer{max-width:760px;margin:40px auto 0;padding:24px 24px 64px;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;}
.share-linkedin{background:#0A66C2;color:#fff;padding:10px 18px;border-radius:6px;font-weight:600;font-size:.88rem;display:inline-flex;align-items:center;gap:8px;}
.share-linkedin:hover{background:#084d94;}

/* ===== About / Hakkımda ===== */
.about-hero{background:var(--ink);color:#fff;padding:64px 0;}
.about-body{max-width:760px;margin:0 auto;padding:48px 24px;font-size:1.05rem;color:#242C38;white-space:pre-wrap;}
.skill-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px;}
.skill{font-family:var(--font-mono);font-size:.78rem;padding:6px 12px;border-radius:6px;background:var(--ink-soft);color:var(--signal);}

/* ===== Footer ===== */
.site-footer{background:var(--ink);color:var(--slate-light);padding:40px 0;margin-top:60px;border-top:1px solid rgba(255,255,255,.08);}
.site-footer .inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;font-size:.85rem;}
.social-links{display:flex;gap:16px;}
.social-links a{color:#D8DCE3;}
.social-links a:hover{color:var(--signal);}

/* ===== Empty state ===== */
.empty-state{text-align:center;padding:60px 20px;color:var(--slate-light);font-family:var(--font-mono);}

/* ===== Search ===== */
.search-box{display:flex;gap:8px;max-width:420px;}
.search-box input{
  flex:1;padding:10px 14px;border:1px solid var(--line);border-radius:6px;font-family:var(--font-body);
}
.search-box button{background:var(--ink);color:#fff;border:0;padding:10px 16px;border-radius:6px;cursor:pointer;}