/* Dijital Biz Dergisi — site stili */
:root {
  --lacivert: #0d1b3e;
  --lacivert-koyu: #091229;
  --mavi: #1e63d0;
  --mavi-acik: #4f8ef7;
  --turkuaz: #19b8c4;
  --zemin: #f5f7fb;
  --kart: #ffffff;
  --metin: #1c2333;
  --metin-soluk: #5a6478;
  --cizgi: #e3e8f2;
  --golge: 0 6px 24px rgba(13, 27, 62, .08);
  --radius: 14px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--zemin);
  color: var(--metin);
  line-height: 1.65;
}
img { max-width: 100%; display: block; }
a { color: var(--mavi); text-decoration: none; }
a:hover { text-decoration: underline; }

.sarici { max-width: 1180px; margin: 0 auto; padding: 0 20px; }

/* Üst menü */
.ustbar {
  background: var(--lacivert);
  position: sticky; top: 0; z-index: 50;
  box-shadow: 0 2px 12px rgba(0,0,0,.25);
}
.ustbar-ic {
  max-width: 1180px; margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; gap: 24px; min-height: 64px;
}
.marka { display: flex; align-items: center; gap: 10px; }
.marka img { height: 34px; width: auto; }
.marka span { color: #fff; font-weight: 700; font-size: 1.15rem; letter-spacing: .3px; }
.menu { display: flex; gap: 4px; margin-left: auto; flex-wrap: wrap; }
.menu a {
  color: #cdd6ea; padding: 8px 14px; border-radius: 8px;
  font-size: .95rem; font-weight: 500;
}
.menu a:hover, .menu a.aktif { color: #fff; background: rgba(255,255,255,.1); text-decoration: none; }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--lacivert) 0%, #14295e 55%, #0e4a8f 100%);
  color: #fff; padding: 64px 0 72px;
}
.hero-ic { display: flex; gap: 48px; align-items: center; flex-wrap: wrap; }
.hero-metin { flex: 1 1 380px; }
.hero h1 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); line-height: 1.25; margin-bottom: 16px; }
.hero p { color: #b9c5e0; font-size: 1.08rem; max-width: 560px; margin-bottom: 26px; }
.hero-kapak {
  flex: 0 0 auto; width: 250px; transform: rotate(2.5deg);
  border-radius: 6px; box-shadow: 0 18px 50px rgba(0,0,0,.45);
  transition: transform .3s;
}
.hero-kapak:hover { transform: rotate(0deg) scale(1.02); }

.dugme {
  display: inline-block; background: var(--mavi); color: #fff;
  padding: 12px 26px; border-radius: 10px; font-weight: 600;
  border: none; cursor: pointer; font-size: 1rem;
}
.dugme:hover { background: var(--mavi-acik); text-decoration: none; }
.dugme.ikincil { background: rgba(255,255,255,.12); }
.dugme.ikincil:hover { background: rgba(255,255,255,.22); }
.dugme-grup { display: flex; gap: 12px; flex-wrap: wrap; }

/* Bölümler */
.bolum { padding: 56px 0; }
.bolum-baslik { font-size: 1.6rem; margin-bottom: 8px; }
.bolum-alt { color: var(--metin-soluk); margin-bottom: 28px; }

/* Arama kutusu */
.arama-kutu { display: flex; gap: 10px; max-width: 620px; }
.arama-kutu input {
  flex: 1; padding: 13px 18px; border: 1px solid var(--cizgi);
  border-radius: 10px; font-size: 1rem; background: var(--kart);
}
.arama-kutu input:focus { outline: 2px solid var(--mavi-acik); border-color: transparent; }

/* Arşiv ızgarası */
.yil-baslik {
  font-size: 1.25rem; margin: 34px 0 16px; padding-bottom: 8px;
  border-bottom: 2px solid var(--cizgi); color: var(--lacivert);
}
.izgara {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 22px;
}
.kapak-kart {
  background: var(--kart); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--golge); transition: transform .18s, box-shadow .18s;
  display: block; color: inherit;
}
.kapak-kart:hover { transform: translateY(-5px); box-shadow: 0 14px 34px rgba(13,27,62,.16); text-decoration: none; }
.kapak-kart img { width: 100%; aspect-ratio: 1299/1772; object-fit: cover; background: #dde3ef; }
.kapak-kart .bilgi { padding: 12px 14px; }
.kapak-kart .ad { font-weight: 600; font-size: .98rem; }
.kapak-kart .detay { font-size: .82rem; color: var(--metin-soluk); margin-top: 2px; }
.kapak-kart .pdf-link { font-size: .82rem; display: inline-block; margin-top: 6px; }

/* İçerik sayfaları */
.icerik { max-width: 820px; margin: 0 auto; padding: 48px 20px 72px; }
.icerik h1 { font-size: 2rem; color: var(--lacivert); margin-bottom: 20px; }
.icerik h2 { font-size: 1.35rem; color: var(--lacivert); margin: 34px 0 12px; }
.icerik p, .icerik li { color: var(--metin); margin-bottom: 12px; }
.icerik ul, .icerik ol { padding-left: 24px; margin-bottom: 16px; }
.kart {
  background: var(--kart); border: 1px solid var(--cizgi);
  border-radius: var(--radius); padding: 24px 28px; margin: 20px 0;
  box-shadow: var(--golge);
}
.kart h3 { color: var(--lacivert); margin-bottom: 8px; }

/* Form */
.form-alan { margin-bottom: 16px; }
.form-alan label { display: block; font-weight: 600; margin-bottom: 6px; font-size: .95rem; }
.form-alan input, .form-alan select, .form-alan textarea {
  width: 100%; padding: 11px 14px; border: 1px solid var(--cizgi);
  border-radius: 8px; font-size: 1rem; font-family: inherit; background: #fff;
}
.form-alan input:focus, .form-alan textarea:focus { outline: 2px solid var(--mavi-acik); border-color: transparent; }
.onay-satir { display: flex; gap: 10px; align-items: flex-start; font-size: .9rem; color: var(--metin-soluk); }
.onay-satir input { width: auto; margin-top: 4px; }

/* Bülten şeridi */
.bulten {
  background: linear-gradient(135deg, var(--lacivert) 0%, #123a75 100%);
  color: #fff; border-radius: var(--radius); padding: 36px 40px;
  display: flex; gap: 32px; align-items: center; flex-wrap: wrap;
}
.bulten h2 { font-size: 1.4rem; margin-bottom: 6px; }
.bulten p { color: #b9c5e0; font-size: .95rem; }
.bulten form { display: flex; gap: 10px; flex: 1 1 320px; flex-wrap: wrap; }
.bulten input[type=email] {
  flex: 1 1 220px; padding: 12px 16px; border-radius: 10px; border: none; font-size: 1rem;
}

/* Arama sonuçları */
.sonuc {
  background: var(--kart); border: 1px solid var(--cizgi); border-radius: var(--radius);
  padding: 18px 22px; margin-bottom: 14px; display: flex; gap: 18px; align-items: flex-start;
  box-shadow: var(--golge);
}
.sonuc img { width: 74px; border-radius: 6px; flex-shrink: 0; }
.sonuc .parca { font-size: .93rem; color: var(--metin-soluk); margin-top: 4px; }
.sonuc mark { background: #ffe9a8; padding: 0 2px; border-radius: 3px; }
.sonuc .kaynak { font-weight: 600; }

/* Alt bilgi */
.altbilgi { background: var(--lacivert-koyu); color: #9aa7c4; margin-top: 40px; }
.altbilgi-ic {
  max-width: 1180px; margin: 0 auto; padding: 40px 20px 30px;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 28px;
}
.altbilgi h4 { color: #fff; margin-bottom: 12px; font-size: 1rem; }
.altbilgi a { color: #9aa7c4; display: block; margin-bottom: 8px; font-size: .92rem; }
.altbilgi a:hover { color: #fff; }
.altbilgi .telif {
  border-top: 1px solid rgba(255,255,255,.08); text-align: center;
  padding: 18px 20px; font-size: .85rem;
}

@media (max-width: 640px) {
  .hero { padding: 40px 0 48px; }
  .hero-kapak { width: 180px; margin: 0 auto; }
  .bulten { padding: 26px 22px; }
  .ustbar-ic { min-height: auto; padding-top: 10px; padding-bottom: 10px; }
  .menu { gap: 0; }
  .menu a { padding: 6px 9px; font-size: .86rem; }
}