/* =============================================================
   18 Yapı — Header: Nav + Mobile Menu
   ============================================================= */

nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 5%;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(251,249,247,0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(139,26,26,0.1);
  transition: box-shadow 0.3s;
}
nav.scrolled {
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.nav-logo img {
  height: 48px;
  width: auto;
  display: block;
  object-fit: contain;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  align-items: center;
}
.nav-links a {
  text-decoration: none;
  color: var(--charcoal);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--crimson); }

.nav-cta {
  background: var(--crimson) !important;
  color: white !important;
  padding: 10px 22px;
  border-radius: 50px;
  font-weight: 600 !important;
  font-size: 0.85rem !important;
  transition: background 0.2s, transform 0.2s !important;
}
.nav-cta:hover {
  background: var(--crimson-dark) !important;
  transform: translateY(-1px);
  color: white !important;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
  z-index: 1100;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--charcoal);
  border-radius: 2px;
  transition: all 0.3s;
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px; left: 0; right: 0;
  background: rgba(251,249,247,0.99);
  border-bottom: 1px solid var(--stone);
  z-index: 999;
  padding: 20px 5% 28px;
  flex-direction: column;
  gap: 4px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}
.mobile-menu.open { display: flex; }

.mobile-menu a {
  display: block;
  padding: 12px 16px;
  color: var(--charcoal);
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  border-radius: var(--radius);
  transition: background 0.2s;
}
.mobile-menu a:hover {
  background: var(--cream);
  color: var(--crimson);
}
.mobile-menu .mobile-cta {
  background: var(--crimson);
  color: white !important;
  text-align: center;
  margin-top: 8px;
  font-weight: 600;
}
.mobile-menu .mobile-cta:hover { background: var(--crimson-dark); }