:root{
  /* Genel sayfa (açık tema) */
  --bg-base:#F5F7FA;
  --bg-elevated:#FFFFFF;
  --bg-sunken:#EDF1F6;
  --border-subtle:#E2E7EF;
  --text-primary:#12182B;
  --text-muted:#5B6472;
  --text-faint:#8B94A5;

  /* Açık tema üzerinde kullanılan vurgu tonları (kontrast için koyulaştırıldı) */
  --accent-up:#0E8F74;
  --accent-up-soft:#E3F5F0;
  --accent-warn:#A9660F;
  --accent-warn-soft:#FBF0DD;
  --accent-down:#C4453D;

  /* Koyu panel yerine kullanılan yumuşak "tonlanmış" panel sistemi (şema/blueprint hissi) */
  --panel-tint:#EAF5F1;
  --panel-tint-2:#F5FAF8;
  --panel-tint-border:#CBE6DB;
  --panel-warn:#F2B84B;

  --font-display:'Space Grotesk', sans-serif;
  --font-body:'IBM Plex Sans', sans-serif;
  --font-mono:'JetBrains Mono', monospace;

  /* Bootstrap değişken geçersiz kılmaları */
  --bs-body-bg:var(--bg-base);
  --bs-body-color:var(--text-primary);
  --bs-border-color:var(--border-subtle);
  --bs-primary:var(--accent-up);
  --bs-primary-rgb:14,143,116;
  --bs-link-color:var(--accent-up);
  --bs-link-hover-color:var(--accent-up);
}

html{scroll-behavior:smooth;scroll-padding-top:90px;}
body{
  background:var(--bg-base);
  font-family:var(--font-body);
  color:var(--text-primary);
  -webkit-font-smoothing:antialiased;
}
a{text-decoration:none;}
::selection{background:var(--accent-up-soft);color:var(--text-primary);}

body::before{
  content:"";
  position:fixed;inset:0;
  background-image:
    linear-gradient(var(--border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
  background-size:64px 64px;
  opacity:0.5;
  pointer-events:none;
  z-index:0;
  mask-image:radial-gradient(ellipse 80% 50% at 50% 0%, #000 20%, transparent 70%);
}

.container, .container-fluid{position:relative;z-index:1;}

h1,h2,h3,h4,h5,.font-display{font-family:var(--font-display);font-weight:600;letter-spacing:-0.01em;color:var(--text-primary);}
.font-mono{font-family:var(--font-mono) !important;}
.text-muted-custom{color:var(--text-muted) !important;}
.text-faint{color:var(--text-faint) !important;}
.text-accent{color:var(--accent-up) !important;}

/* ---------- NAVBAR ---------- */
.navbar-custom{
  background:rgba(245,247,250,0.88);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border-subtle);
  padding-top:14px;padding-bottom:14px;
}
.navbar-custom .navbar-brand{
  font-family:var(--font-mono);font-size:15px;font-weight:500;color:var(--text-primary);
  display:flex;align-items:center;gap:10px;
}
.navbar-brand .dot{
  width:9px;height:9px;border-radius:50%;background:var(--accent-up);
  box-shadow:0 0 0 3px var(--accent-up-soft);flex:none;display:inline-block;
}
.navbar-custom .nav-link{
  font-family:var(--font-mono);font-size:13.5px;color:var(--text-muted);
  padding:6px 14px !important;
}
.navbar-custom .nav-link::before{content:"·/";color:var(--text-faint);margin-right:5px;}
.navbar-custom .nav-link:hover, .navbar-custom .nav-link.active{color:var(--text-primary);}
.navbar-toggler{border-color:var(--border-subtle);padding:6px 10px;}

.btn-accent{
  background:var(--accent-up);border:none;color:#FFFFFF;
  font-family:var(--font-mono);font-weight:600;font-size:13px;
  padding:10px 18px;border-radius:7px;
}
.btn-accent:hover{background:#0B7A62;color:#fff;transform:translateY(-1px);}
.btn-outline-custom{
  border:1px solid var(--border-subtle);color:var(--text-primary);
  font-family:var(--font-mono);font-weight:500;font-size:13px;
  padding:10px 18px;border-radius:7px;background:transparent;
}
.btn-outline-custom:hover{border-color:var(--accent-up);background:var(--accent-up-soft);color:var(--text-primary);}
.btn-dark-solid{
  background:var(--text-primary);color:#fff;
  font-family:var(--font-mono);font-weight:600;font-size:13.5px;
  padding:13px 22px;border-radius:7px;border:none;
}
.btn-dark-solid:hover{opacity:.88;color:#fff;transform:translateY(-1px);}

/* ---------- HERO ---------- */
.hero-section{padding:132px 0 60px;}
.eyebrow{
  font-family:var(--font-mono);font-size:12.5px;color:var(--accent-up);
  letter-spacing:0.06em;display:flex;align-items:center;gap:10px;margin-bottom:20px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--accent-up);}
.hero-section h1{font-size:clamp(32px,4.6vw,50px);line-height:1.1;}
.hero-section h1 .accent{color:var(--accent-up);}
.hero-lead{color:var(--text-muted);font-size:17px;max-width:480px;}

.value-row{margin-top:8px;}
.value-chip{
  border-left:2px solid var(--accent-up);padding-left:14px;font-family:var(--font-mono);
}
.value-chip .lbl{font-size:13px;color:var(--text-primary);font-weight:500;display:block;line-height:1.35;}

.topo-frame{
  background:
    radial-gradient(circle at 1px 1px, rgba(14,143,116,0.18) 1px, transparent 0) 0 0/18px 18px,
    linear-gradient(160deg, var(--panel-tint) 0%, #FFFFFF 130%);
  border:1px solid var(--panel-tint-border);
  border-radius:14px;padding:18px;
  box-shadow:0 16px 38px -26px rgba(18,24,43,0.22);
}
.topo-frame .frame-top{
  display:flex;justify-content:space-between;font-family:var(--font-mono);
  font-size:11px;color:var(--text-muted);margin-bottom:8px;
}
.frame-top .status{color:var(--accent-up);display:flex;align-items:center;gap:6px;}
.frame-top .status::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent-up);animation:pulse-dot 1.8s ease-in-out infinite;}
@keyframes pulse-dot{0%,100%{opacity:1;}50%{opacity:0.35;}}

.switch-wrap{display:flex;justify-content:center;padding:6px 0 10px;}
.radar-caption{
  border-top:1px solid var(--panel-tint-border);padding-top:14px;
  font-family:var(--font-mono);font-size:12px;color:var(--text-muted);
  display:flex;align-items:center;gap:8px;
}
.radar-caption .rc-dot{width:7px;height:7px;border-radius:50%;background:var(--accent-up);flex:none;
  box-shadow:0 0 0 3px rgba(79,216,168,0.22);animation:pulse-dot 1.8s ease-in-out infinite;}

/* ---------- STATUS STRIP ---------- */
.status-strip{
  border-top:1px solid var(--border-subtle);border-bottom:1px solid var(--border-subtle);
  background:var(--bg-sunken);
}
.status-strip .status-item{
  padding:18px 22px;border-right:1px solid var(--border-subtle);font-family:var(--font-mono);
}
.status-strip .col:last-child .status-item{border-right:none;}
.status-item .k{font-size:11px;color:var(--text-faint);text-transform:uppercase;letter-spacing:.06em;}
.status-item .v{font-size:15.5px;margin-top:4px;font-weight:600;color:var(--text-primary);}
.status-item .v.up{color:var(--accent-up);}
.status-item .v.warn{color:var(--accent-warn);}

/* ---------- SECTIONS ---------- */
.section{padding:90px 0;}
.sec-tag{font-family:var(--font-mono);font-size:12px;color:var(--accent-up);letter-spacing:.04em;display:block;margin-bottom:10px;}
.sec-desc{color:var(--text-muted);font-size:14.5px;max-width:420px;}
.see-all{
  font-family:var(--font-mono);font-size:13px;color:var(--text-muted);
  border-bottom:1px solid var(--border-subtle);padding-bottom:2px;
}
.see-all:hover{color:var(--accent-up);border-color:var(--accent-up);}

/* ---------- ABOUT / PROFILE ---------- */
.profile-frame{
  position:relative;width:200px;height:200px;border-radius:50%;
  background:var(--panel-tint);border:1px solid var(--panel-tint-border);
  display:flex;align-items:center;justify-content:center;margin:0 auto;
}
.profile-frame::after{
  content:"";position:absolute;inset:-8px;border-radius:50%;
  border:1px dashed var(--border-subtle);
}
.profile-frame .status-dot{
  position:absolute;bottom:10px;right:10px;width:20px;height:20px;border-radius:50%;
  background:var(--accent-up);border:4px solid var(--bg-base);
}
.about-card{
  background:
    radial-gradient(circle at 1px 1px, rgba(14,143,116,0.16) 1px, transparent 0) 0 0/18px 18px,
    linear-gradient(160deg, var(--panel-tint) 0%, #FFFFFF 130%);
  border:1px solid var(--panel-tint-border);border-radius:14px;padding:32px;
  box-shadow:0 16px 38px -26px rgba(18,24,43,0.2);
}
.skill-badge{
  font-family:var(--font-mono);font-size:12px;color:var(--accent-up);
  background:var(--accent-up-soft);border:1px solid transparent;padding:6px 12px;border-radius:6px;
  display:inline-block;margin:0 8px 8px 0;
}
.social-icon{
  width:42px;height:42px;border-radius:8px;border:1px solid var(--border-subtle);
  display:inline-flex;align-items:center;justify-content:center;color:var(--text-primary);
  background:var(--bg-elevated);
  margin-right:10px;transition:border-color .2s ease,color .2s ease;
}
.social-icon:hover{border-color:var(--accent-up);color:var(--accent-up);}

/* Experience timeline */
.timeline{border-left:1px solid var(--border-subtle);padding-left:26px;}
.timeline-item{position:relative;padding-bottom:34px;}
.timeline-item:last-child{padding-bottom:0;}
.timeline-item::before{
  content:"";position:absolute;left:-31px;top:4px;width:10px;height:10px;
  border-radius:50%;background:var(--accent-up);box-shadow:0 0 0 3px var(--accent-up-soft);
}
.timeline-item .t-meta{font-family:var(--font-mono);font-size:12px;color:var(--text-faint);}
.timeline-item h5{margin:4px 0 6px;font-size:16px;}
.timeline-item p{color:var(--text-muted);font-size:14px;margin:0;}

/* ---------- FEATURED POST ---------- */
.featured-card{background:var(--bg-elevated);border:1px solid var(--border-subtle);border-radius:14px;overflow:hidden;
  box-shadow:0 1px 2px rgba(18,24,43,0.04);}
.featured-visual {
    background: radial-gradient(circle at 1px 1px, rgba(14,143,116,0.14) 1px, transparent 0) 0 0/18px 18px, linear-gradient(160deg, var(--panel-tint) 0%, #FFFFFF 130%);
    aspect-ratio: 4 / 3;
    min-height: 220px;
}
.featured-visual .cover-img{min-height:220px;}
.post-meta{font-family:var(--font-mono);font-size:12px;color:var(--text-faint);}
.post-meta .cat{color:var(--accent-up);font-weight:600;}
.post-meta .cat-ag{color:#0E8F74;}
.post-meta .cat-sistem{color:#3B5BA5;}
.post-meta .cat-otomasyon{color:#A9660F;}
.post-meta .cat-guvenlik{color:#C4453D;}
.post-meta .cat-fortinet{color:#C0392B;}

/* ---------- BLOG CARDS + KAPAK GÖRSELLERİ ---------- */
.post-card{
  background:var(--bg-elevated);border:1px solid var(--border-subtle);border-radius:12px;
  height:100%;transition:border-color .2s ease, transform .2s ease, box-shadow .2s ease;
  overflow:hidden;display:flex;flex-direction:column;
}
.post-card:hover{border-color:var(--accent-up);transform:translateY(-3px);box-shadow:0 14px 30px -18px rgba(18,24,43,0.25);}
.post-cover {
    aspect-ratio: 16 / 10;
    height: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    flex: none;
    overflow: hidden;
}
.post-cover.cover-network{background:linear-gradient(135deg,#E3F5F0,#CFEBE2);}
.post-cover.cover-system{background:linear-gradient(135deg,#E8ECF7,#D9E1F3);}
.post-cover.cover-automation{background:linear-gradient(135deg,#FBF0DD,#F5E2BC);}
.post-cover.cover-security{background:linear-gradient(135deg,#FBE8E5,#F4D3CD);}
.cover-img{width:100%;height:100%;object-fit:cover;display:block;}
.featured-visual .cover-img{border-radius:0;}
.post-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1;}
.post-card h5{font-size:17px;margin:12px 0 10px;line-height:1.35;}
.post-card p{color:var(--text-muted);font-size:13.6px;flex:1;}
.read-link{font-family:var(--font-mono);font-size:13px;color:var(--text-primary);}
.read-link:hover{color:var(--accent-up);}

/* ---------- TERMINAL (about "whoami" kutusu) ---------- */
.terminal-box{
  background:
    radial-gradient(circle at 1px 1px, rgba(14,143,116,0.16) 1px, transparent 0) 0 0/18px 18px,
    linear-gradient(160deg, var(--panel-tint) 0%, #FFFFFF 130%);
  border:1px solid var(--panel-tint-border);border-radius:12px;overflow:hidden;
  box-shadow:0 16px 38px -26px rgba(18,24,43,0.2);
}
.terminal-box .bar{display:flex;gap:7px;padding:12px 16px;border-bottom:1px solid var(--panel-tint-border);}
.terminal-box .bar span{width:10px;height:10px;border-radius:50%;background:var(--panel-tint-border);}
.terminal-box .body{padding:22px;font-family:var(--font-mono);font-size:13px;color:var(--text-muted);}
.terminal-box .body .l1{color:var(--accent-up);}
.terminal-box .body .out{color:var(--text-primary);margin:4px 0 16px;}
.terminal-cursor{display:inline-block;width:7px;height:14px;background:var(--accent-up);animation:blink 1s step-end infinite;vertical-align:middle;}
@keyframes blink{50%{opacity:0;}}

/* ---------- CONTACT / CTA ---------- */
.cta-panel{
  background:
    radial-gradient(circle at 1px 1px, rgba(14,143,116,0.16) 1px, transparent 0) 0 0/18px 18px,
    linear-gradient(160deg, var(--panel-tint) 0%, #FFFFFF 130%);
  border:1px solid var(--panel-tint-border);border-radius:16px;
  padding:56px;text-align:center;position:relative;overflow:hidden;
  box-shadow:0 16px 38px -26px rgba(18,24,43,0.2);
}
.cta-panel::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 50% 0%, rgba(79,216,168,0.16), transparent 60%);
}
.cta-panel > *{position:relative;}
.cta-panel h2{color:var(--text-primary);}

.form-control-custom{
  background:var(--panel-tint-2);border:1px solid var(--panel-tint-border);color:var(--text-primary);
  font-family:var(--font-body);border-radius:8px;padding:12px 14px;
}
.form-control-custom:focus{
  background:var(--panel-tint-2);border-color:var(--accent-up);color:var(--text-primary);
  box-shadow:0 0 0 3px rgba(79,216,168,0.18);
}
.form-control-custom::placeholder{color:var(--text-muted);}

/* ---------- FOOTER ---------- */
.footer-custom{border-top:1px solid var(--border-subtle);padding:36px 0;background:var(--bg-elevated);}
.footer-custom .fmeta{font-family:var(--font-mono);font-size:12px;color:var(--text-faint);}
.footer-custom .flinks a{font-family:var(--font-mono);font-size:12.5px;color:var(--text-muted);margin-left:20px;}
.footer-custom .flinks a:hover{color:var(--accent-up);}

/* ---------- BLOG LİSTESİ: KATEGORİ FİLTRESİ ---------- */
.filter-bar{border-bottom:1px solid var(--border-subtle);background:var(--bg-sunken);padding:18px 0;}
.filter-btn{
  font-family:var(--font-mono);font-size:12.5px;color:var(--text-muted);
  background:var(--bg-elevated);border:1px solid var(--border-subtle);border-radius:20px;
  padding:7px 16px;transition:all .15s ease;
}
.filter-btn:hover{border-color:var(--accent-up);color:var(--text-primary);}
.filter-btn.active{background:var(--accent-up);border-color:var(--accent-up);color:#fff;}

/* Kart tıklanabilir link sarmalayıcı */
.post-card-link{display:block;color:inherit;}
.post-card-link:hover{color:inherit;}
.post-card-link .post-card{cursor:pointer;}

/* ---------- YAZI DETAY: KAPAK GÖRSELİ ---------- */
.article-cover {
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid var(--panel-tint-border);
    aspect-ratio: 3 / 1;
}

.article-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    margin: 24px 0;
    display: block;
}
/* ---------- YAZI DETAY: MAKALE TİPOGRAFİSİ ---------- */
.article-content{font-size:16.5px;line-height:1.75;color:var(--text-primary);}
.article-content p{margin-bottom:22px;color:var(--text-primary);}
.article-content h2{font-size:22px;margin:42px 0 18px;}
.article-content h3{font-size:18px;margin:32px 0 14px;}
.article-content ul{margin-bottom:22px;padding-left:22px;}
.article-content li{margin-bottom:8px;color:var(--text-primary);}
.article-content strong{color:var(--text-primary);font-weight:600;}
.article-content code{
  font-family:var(--font-mono);font-size:0.88em;color:var(--accent-up);
  background:var(--accent-up-soft);padding:2px 6px;border-radius:4px;
}
.article-content a{color:var(--accent-up);border-bottom:1px solid var(--accent-up-soft);text-decoration:none;}
.article-content a:hover{border-bottom-color:var(--accent-up);}
.article-content blockquote{
  margin:28px 0;padding:16px 22px;border-left:3px solid var(--accent-up);
  background:var(--accent-up-soft);border-radius:0 8px 8px 0;
  font-style:italic;color:var(--text-primary);font-size:15.5px;
}

.code-block{
  background:
    radial-gradient(circle at 1px 1px, rgba(14,143,116,0.14) 1px, transparent 0) 0 0/16px 16px,
    linear-gradient(160deg, var(--panel-tint) 0%, #FFFFFF 130%);
  border:1px solid var(--panel-tint-border);border-radius:10px;overflow:hidden;margin:24px 0;
}
.code-block-bar{display:flex;gap:6px;padding:10px 14px;border-bottom:1px solid var(--panel-tint-border);}
.code-block-bar span{width:9px;height:9px;border-radius:50%;background:var(--panel-tint-border);}
.code-block pre{margin:0;padding:16px 18px;overflow-x:auto;}
.code-block code{
  font-family:var(--font-mono);font-size:13px;line-height:1.6;color:var(--text-primary);
  background:none;padding:0;white-space:pre;
}

/* ---------- YAZI DETAY: YAZAR KUTUSU ---------- */
.author-box {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 22px;
    padding: 28px;
    background: radial-gradient(circle at 1px 1px, rgba(14,143,116,0.14) 1px, transparent 0) 0 0/18px 18px, linear-gradient(160deg, var(--panel-tint) 0%, #FFFFFF 130%);
    border: 1px solid var(--panel-tint-border);
    border-radius: 14px;
}
.author-box h6{font-family:var(--font-display);font-weight:600;font-size:15px;margin:0;}

@media (max-width:991.98px){
  .featured-visual{border-bottom:1px solid var(--panel-tint-border);}
}
@media (max-width:767.98px) {
    .hero-section {
        padding: 104px 0 44px;
    }

    .section {
        padding: 64px 0;
    }

    .about-card, .cta-panel, .article-panel {
        padding: 26px;
    }

    .topo-frame {
        padding: 16px;
    }

    .author-box {
        flex-direction: column;
        text-align: center;
        align-items: center;
        justify-content: center;
    }
}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;}
}
a:focus-visible, button:focus-visible{outline:2px solid var(--accent-up); outline-offset:2px;}
/* ---------- YAZI DETAY: YAN PANEL (ÖNERİLEN YAZILAR) ---------- */
.sidebar-panel {
    background: radial-gradient(circle at 1px 1px, rgba(14,143,116,0.14) 1px, transparent 0) 0 0/18px 18px, linear-gradient(160deg, var(--panel-tint) 0%, #FFFFFF 130%);
    border: 1px solid var(--panel-tint-border);
    border-radius: 14px;
    padding: 22px;
    position: sticky;
    top: 100px;
}

.related-mini {
    display: flex;
    gap: 12px;
    padding: 14px 0;
    border-bottom: 1px solid var(--panel-tint-border);
}

    .related-mini:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }

    .related-mini .thumb {
        width: 64px;
        height: 64px;
        border-radius: 8px;
        overflow: hidden;
        flex: none;
    }

        .related-mini .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

    .related-mini h6 {
        font-size: 13.5px;
        margin: 0;
        line-height: 1.35;
        color: var(--text-primary);
    }
.article-panel {
    background: radial-gradient(circle at 1px 1px, rgba(14,143,116,0.14) 1px, transparent 0) 0 0/18px 18px, linear-gradient(160deg, var(--panel-tint) 0%, #FFFFFF 130%);
    border: 1px solid var(--panel-tint-border);
    border-radius: 14px;
    padding: 36px 40px;
}

@media (max-width:991.98px) {
    .article-panel {
        padding: 28px 20px;
    }
}
.invalid-feedback-custom {
    color: #C4453D;
    font-size: 12.5px;
    margin-top: 4px;
    min-height: 16px;
}
.profile-frame img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    object-position: center 20%;
}
.author-box .profile-frame {
    margin: 0;
    flex-shrink: 0;
}
@media (max-width:991.98px) {
    .sidebar-panel {
        position: static;
        top: auto;
    }
}