/* Header: logo ve menü */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(248, 250, 248, 0.82);
  border-bottom: 1px solid transparent;
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  backdrop-filter: saturate(160%) blur(14px);
  transition: border-color 0.2s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

/* Logo: g? simgesi + yazı (header ve footer'da aynı parça kullanılır) */
.logo {
  display: inline-flex;
  flex-shrink: 0;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
}

.logo__mark {
  display: block;
  width: 32px;
  height: 32px;
}

.logo__text {
  font-size: 19px;
  font-weight: 650;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.logo__accent {
  color: var(--color-forest);
}

@media (max-width: 360px) {
  .logo {
    gap: 8px;
  }

  .logo__mark {
    width: 28px;
    height: 28px;
  }

  .logo__text {
    font-size: 17px;
  }
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-nav__link {
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  color: var(--color-text-secondary);
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.site-nav__link:hover,
.site-nav__link[aria-current="page"] {
  color: var(--color-text);
  background: var(--color-mint);
}

.site-nav__login[aria-current="page"] {
  border-color: var(--color-forest);
}

.site-nav__login {
  min-height: 40px;
  margin-left: 6px;
  padding: 0 18px;
  font-size: 15px;
}

/* Mobil menü düğmesi: masaüstünde gizli */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  margin-right: -10px;
  padding: 0 11px;
  border: 0;
  border-radius: var(--radius-pill);
  background: transparent;
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  height: 1.5px;
  border-radius: 2px;
  background: var(--color-text);
  transition: transform 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:first-child {
  transform: translateY(3.75px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  transform: translateY(-3.75px) rotate(-45deg);
}

@media (max-width: 720px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 12px var(--gutter) 20px;
    background: var(--color-warm-white);
    border-bottom: 1px solid var(--color-line);
    box-shadow: 0 16px 32px rgba(23, 33, 29, 0.06);
    display: none;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav__link {
    padding: 12px 14px;
    font-size: 17px;
  }

  .site-nav__login {
    margin: 8px 0 0;
    min-height: 48px;
  }
}