/* ============================================================
   Şener Özbağçe — Kişisel Site
   Tema: "Ağ Mühendisi" — sinyal/uptime estetiği
   ============================================================ */

:root {
  --ink: #0f1720;
  --ink-soft: #3a4654;
  --muted: #6b7686;
  --line: #dde3ea;
  --paper: #f6f8fb;
  --card: #ffffff;
  --navy: #1d3557;
  --navy-deep: #10233e;
  --signal: #ff6a3d;
  --signal-soft: #ffe4d8;
  --ok: #2a9d6f;
  --radius: 10px;
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, 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; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ---------- signature: node-line divider ---------- */
.node-line {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0 0 28px;
  color: var(--muted);
}
.node-line::before, .node-line::after {
  content: "";
  height: 1px;
  flex: 1;
  background: repeating-linear-gradient(90deg, var(--line) 0 6px, transparent 6px 10px);
}
.node-line .node-dot {
  width: 7px; height: 7px; border-radius: 1px;
  background: var(--signal);
  transform: rotate(45deg);
  flex-shrink: 0;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--navy);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* ---------- header ---------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(246,248,251,0.92);
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 40;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}
.brand { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-family: var(--font-display); font-weight: 600; font-size: 21px; color: var(--navy-deep); }
.brand-tagline { font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em; color: var(--signal); text-transform: uppercase; }

.main-nav { display: flex; gap: 28px; }
.main-nav a {
  font-size: 14.5px; font-weight: 600; color: var(--ink-soft);
  padding: 6px 2px; border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
}
.main-nav a:hover, .main-nav a.active { color: var(--navy-deep); border-color: var(--signal); }

.nav-toggle { display: none; flex-direction: column; gap: 4px; background: none; border: 0; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--ink); display: block; }

/* ---------- hero ---------- */
.hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(600px 300px at 85% -10%, rgba(255,106,61,0.08), transparent 60%),
    var(--paper);
}
.hero-inner { display: grid; grid-template-columns: 1.3fr 0.9fr; gap: 48px; align-items: center; }
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.06;
  margin: 14px 0 18px;
  color: var(--navy-deep);
}
.hero h1 em { font-style: normal; color: var(--signal); }
.hero-lede { font-size: 17px; color: var(--ink-soft); max-width: 46ch; }
.hero-meta { display: flex; gap: 22px; margin-top: 28px; flex-wrap: wrap; }
.hero-meta div { font-family: var(--font-mono); font-size: 12px; color: var(--muted); }
.hero-meta strong { display: block; font-family: var(--font-body); font-size: 15px; color: var(--ink); font-weight: 700; }

.hero-portrait {
  position: relative;
  aspect-ratio: 4/5;
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(160deg, var(--navy), var(--navy-deep));
  display: flex; align-items: flex-end;
  border: 1px solid var(--line);
}
.hero-portrait img { width: 100%; height: 100%; object-fit: cover; }
.hero-portrait .placeholder {
  width: 100%; height: 100%; display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.5); font-family: var(--font-mono); font-size: 13px; text-align: center; padding: 20px;
}
.status-chip {
  position: absolute; bottom: 14px; left: 14px; right: 14px;
  background: rgba(15,23,32,0.72); backdrop-filter: blur(4px);
  color: #fff; border-radius: 8px; padding: 10px 12px;
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .03em;
  display: flex; justify-content: space-between;
}
.status-chip b { color: var(--ok); }

/* ---------- sections ---------- */
section.block { padding: 56px 0; }
section.block.alt { background: var(--card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
h2.section-title {
  font-family: var(--font-display);
  font-size: 30px;
  color: var(--navy-deep);
  margin: 0 0 22px;
}

.prose { color: var(--ink-soft); font-size: 16px; }
.prose p { margin: 0 0 16px; }
.prose h3 { font-family: var(--font-display); color: var(--navy-deep); font-size: 20px; margin: 28px 0 8px; }
.prose ul { padding-left: 20px; }
.prose li { margin-bottom: 6px; }

.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.tag-list span {
  font-family: var(--font-mono); font-size: 12px; padding: 5px 10px;
  border: 1px solid var(--line); border-radius: 999px; color: var(--ink-soft); background: #fff;
}

/* ---------- cards / grids ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  transition: transform .15s, box-shadow .15s, border-color .15s;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 10px 24px rgba(16,35,62,0.08); border-color: #c8d2dc; }

.post-card { display: flex; flex-direction: column; gap: 10px; }
.post-card .cover { border-radius: 8px; overflow: hidden; aspect-ratio: 16/9; background: var(--paper); border: 1px solid var(--line); }
.post-card .cover img { width: 100%; height: 100%; object-fit: cover; }
.post-card .date { font-family: var(--font-mono); font-size: 11.5px; color: var(--signal); text-transform: uppercase; letter-spacing: .06em; }
.post-card h3 { font-family: var(--font-display); font-size: 19px; margin: 0; color: var(--navy-deep); }
.post-card p { color: var(--muted); font-size: 14.5px; margin: 0; }
.read-more { font-family: var(--font-mono); font-size: 12.5px; color: var(--navy); font-weight: 600; }
.read-more::after { content: " →"; }

.cert-card { display: flex; gap: 14px; align-items: center; }
.cert-card .icon {
  width: 44px; height: 44px; border-radius: 8px; background: var(--signal-soft);
  color: var(--signal); display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-weight: 700; font-size: 12px; flex-shrink: 0;
}
.cert-card-body { min-width: 0; }
.cert-card h4 {
  margin: 0 0 4px; font-size: 15px; font-weight: 700; color: var(--ink);
  line-height: 1.3;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.cert-card .read-more { font-size: 12px; }

.video-embed {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--line);
  margin: 28px 0;
  background: #000;
}
.video-embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

.post-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
  margin-top: 28px;
}
.post-gallery a {
  display: block; border-radius: 8px; overflow: hidden; border: 1px solid var(--line);
  aspect-ratio: 4/3;
}
.post-gallery img { width: 100%; height: 100%; object-fit: cover; transition: transform .2s; }
.post-gallery a:hover img { transform: scale(1.05); }

/* project timeline */
.timeline { border-left: 2px solid var(--line); padding-left: 24px; display: flex; flex-direction: column; gap: 26px; }
.timeline-item { position: relative; }
.timeline-item::before {
  content: ""; position: absolute; left: -30px; top: 4px;
  width: 10px; height: 10px; background: var(--navy); transform: rotate(45deg);
}
.timeline-item h4 { font-family: var(--font-display); font-size: 18px; margin: 0 0 6px; color: var(--navy-deep); }
.timeline-item ul { margin: 6px 0 0; padding-left: 18px; color: var(--ink-soft); font-size: 14.5px; }

/* ---------- buttons/forms ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 13px; font-weight: 600;
  padding: 11px 18px; border-radius: 7px; border: 1px solid transparent;
  cursor: pointer; text-align: center;
}
.btn-primary { background: var(--navy-deep); color: #fff; }
.btn-primary:hover { background: var(--navy); }
.btn-accent { background: var(--signal); color: #fff; }
.btn-accent:hover { filter: brightness(1.06); }
.btn-outline { border-color: var(--line); background: #fff; color: var(--ink); }
.btn-outline:hover { border-color: var(--navy); }
.btn-danger { background: #b3261e; color: #fff; }
.btn-sm { padding: 7px 12px; font-size: 12px; }

.field { margin-bottom: 18px; }
.field label { display: block; font-size: 13px; font-weight: 700; margin-bottom: 6px; color: var(--ink-soft); }
.field input[type=text], .field input[type=email], .field input[type=password],
.field input[type=url], .field input[type=file], .field textarea, .field select {
  width: 100%; padding: 11px 12px; border: 1px solid var(--line); border-radius: 7px;
  font-family: var(--font-body); font-size: 14.5px; background: #fff; color: var(--ink);
}
.field textarea { resize: vertical; min-height: 140px; }
.field-hint { font-size: 12px; color: var(--muted); margin-top: 4px; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 30px 0; margin-top: 40px; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer-links { display: flex; gap: 18px; font-size: 13.5px; font-weight: 600; color: var(--ink-soft); }
.footer-copy { font-family: var(--font-mono); font-size: 12px; color: var(--muted); margin: 0; }

/* ---------- admin ---------- */
.admin-body { background: #eef1f5; min-height: 100vh; }
.admin-shell { display: flex; min-height: 100vh; }
.admin-sidebar {
  width: 230px; background: var(--navy-deep); color: #fff; flex-shrink: 0;
  padding: 22px 16px; position: sticky; top: 0; height: 100vh;
}
.admin-sidebar .brand-name { color: #fff; }
.admin-sidebar .brand-tagline { color: var(--signal); }
.admin-nav { margin-top: 32px; display: flex; flex-direction: column; gap: 3px; }
.admin-nav a {
  padding: 10px 12px; border-radius: 7px; font-size: 14px; font-weight: 600;
  color: rgba(255,255,255,0.75);
}
.admin-nav a:hover { background: rgba(255,255,255,0.06); color: #fff; }
.admin-nav a.active { background: var(--signal); color: #fff; }
.admin-main { flex: 1; padding: 32px 36px; max-width: 1100px; }
.admin-topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 26px; }
.admin-topbar h1 { font-family: var(--font-display); font-size: 26px; margin: 0; color: var(--navy-deep); }
.admin-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; margin-bottom: 22px; }

.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--line); font-size: 14px; }
.table th { font-family: var(--font-mono); font-size: 11.5px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.table tr:hover td { background: #fafbfd; }
.row-actions { display: flex; gap: 8px; }

.alert { padding: 12px 16px; border-radius: 8px; font-size: 14px; margin-bottom: 18px; font-weight: 600; }
.alert-success { background: #e4f6ee; color: #16794f; border: 1px solid #bfe9d5; }
.alert-error { background: #fde8e6; color: #a3271f; border: 1px solid #f6c6c1; }

.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--navy-deep); padding: 20px; }
.login-card { background: #fff; padding: 40px; border-radius: 12px; width: 100%; max-width: 380px; }
.login-card h1 { font-family: var(--font-display); font-size: 24px; text-align: center; margin: 0 0 4px; color: var(--navy-deep); }
.login-card p.sub { text-align: center; color: var(--muted); font-size: 13px; margin: 0 0 26px; font-family: var(--font-mono); }

.thumb-preview { width: 100%; max-width: 260px; border-radius: 8px; border: 1px solid var(--line); margin-top: 8px; }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-portrait { max-width: 320px; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .admin-sidebar { position: fixed; left: -240px; transition: left .2s; z-index: 50; }
  .admin-sidebar.open { left: 0; }
  .admin-main { padding: 20px; }
}
@media (max-width: 620px) {
  .main-nav { position: fixed; top: 66px; left: 0; right: 0; background: var(--paper); flex-direction: column; padding: 16px 24px; border-bottom: 1px solid var(--line); display: none; }
  .main-nav.open { display: flex; }
  .nav-toggle { display: flex; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .hero { padding: 40px 0 32px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}