body { margin: 0; font-family: 'Segoe UI', Arial, sans-serif; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 1rem; }
header {
  background: #fff;
  border-bottom: 1px solid #eee;
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
/* Modern birleşik logo */
/* Modern birleşik logo tek font ile */
.logo-combined {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.1;
  margin-right: 16px;
}
.logo-main {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: #1e293b;
  font-family: 'Segoe UI', Arial, sans-serif;
  text-transform: uppercase;
  text-shadow: 0 2px 8px rgba(30,41,59,0.06);
  display: inline-block;
}
.logo-sub-main {
  font-size: 1.1rem;
  font-weight: 800;
  color: #64748b;
  letter-spacing: 0.18em;
  margin-left: 8px;
  text-transform: uppercase;
  font-family: inherit;
  opacity: 0.95;
  display: inline-block;
}
nav {
  display: flex;
  gap: 1.5rem;
}
nav a {
  color: #1e293b;
  text-decoration: none;
  font-weight: 500;
  padding: 8px 18px;
  border-radius: 6px;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}
nav a:hover, nav a.active {
  background: linear-gradient(90deg, #1e293b 60%, #64748b 100%);
  color: #fff;
  box-shadow: 0 2px 8px rgba(30,41,59,0.08);
}
@media (max-width: 700px) {
  .header-inner { flex-direction: column; height: auto; padding: 10px 0; }
  nav { flex-direction: column; gap: 0.5rem; width: 100%; align-items: flex-start; }
  nav a { width: 100%; }
}