/* ==========================================================================
   ASILGEN MÜHENDİSLİK — Header CSS
   Floating sticky header, navigasyon, tema butonu, hamburger menü
   ========================================================================== */

/* --------------------------------------------------------------------------
   Site Header — Viewport Ortasında Yüzen Kapsayıcı
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: min(92vw, 1200px);
  z-index: 100;

  /* İnce glassmorphism */
  background: var(--color-header-bg);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);

  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.2), 0 1px 0 rgba(255, 255, 255, 0.04) inset;

  /* İç düzen */
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 36px;

  /* Tema geçişinde smooth */
  transition:
    background-color 0.4s ease,
    border-color 0.4s ease,
    box-shadow 0.4s ease;
}

/* --------------------------------------------------------------------------
   Logo / Marka Adı
   -------------------------------------------------------------------------- */
.site-header__logo {
  font-size: 1.45rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  white-space: nowrap;
  text-transform: uppercase;
  transition: opacity 0.2s ease;
  display: flex;
  gap: 6px;
}

.logo-first {
  color: #f5c518;
}

.logo-second {
  color: var(--color-accent);
}

.site-header__logo:hover {
  opacity: 0.85;
}

/* --------------------------------------------------------------------------
   Sağ Taraf — Navigasyon + Tema Butonu
   -------------------------------------------------------------------------- */
.site-header__right {
  display: flex;
  align-items: center;
  gap: 2rem;
}

/* --------------------------------------------------------------------------
   Navigasyon Linkleri
   -------------------------------------------------------------------------- */
.site-header__nav {
  display: flex;
  align-items: center;
  gap: 2.2rem;
}

.nav-link {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  position: relative;
  padding-bottom: 2px;
  transition: color 0.2s ease;
}

/* Alt çizgi efekti */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-accent);
  transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link:hover {
  color: var(--color-accent);
}

.nav-link:hover::after {
  width: 100%;
}

/* --------------------------------------------------------------------------
   Tema Geçiş Butonu
   -------------------------------------------------------------------------- */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 30%;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  background: transparent;
  cursor: pointer;
  box-shadow: none;
  /* Glow yok */
  transition:
    transform 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease;
  flex-shrink: 0;
}

.theme-toggle:hover {
  transform: scale(1.08);
  background: rgba(var(--color-accent-rgb), 0.08);
  box-shadow: none;
  /* Hover'da da glow yok */
}

.theme-toggle:active {
  transform: scale(0.95);
}

.theme-toggle svg {
  width: 16px;
  height: 16px;
}

.theme-toggle:hover svg {
  transform: none;
  /* Svg dönüşü de kaldırıldı — sade */
}

/* İkon görünürlüğü */
.icon-sun,
.icon-moon {
  transition: opacity 0.3s ease, transform 0.3s ease;
}

/* Dark modda güneş ikonu gizli, ay ikonu görünür */
[data-theme="dark"] .icon-sun {
  display: none;
}

[data-theme="dark"] .icon-moon {
  display: block;
}

/* Light modda ay ikonu gizli, güneş ikonu görünür */
[data-theme="light"] .icon-moon {
  display: none;
}

[data-theme="light"] .icon-sun {
  display: block;
}

/* --------------------------------------------------------------------------
   Hamburger Menü Butonu (Mobil)
   -------------------------------------------------------------------------- */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 38px;
  height: 38px;
  gap: 5px;
  cursor: pointer;
  border-radius: 8px;
  transition: background 0.2s ease;
}

.hamburger:hover {
  background: rgba(var(--color-accent-rgb), 0.1);
}

.hamburger__line {
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition:
    transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
    opacity 0.25s ease;
  transform-origin: center;
}

/* Hamburger → X animasyonu */
.hamburger.is-open .hamburger__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.is-open .hamburger__line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger.is-open .hamburger__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   Mobil Navigasyon Panel
   -------------------------------------------------------------------------- */
.mobile-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 10, 10, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 99;

  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;

  /* Başlangıç durumu — kapalı */
  opacity: 0;
  pointer-events: none;
  transform: scale(1.03);
  transition:
    opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1),
    transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-nav.is-open {
  opacity: 1;
  pointer-events: all;
  transform: scale(1);
}

.mobile-nav__link {
  font-size: clamp(1.4rem, 5vw, 2rem);
  font-weight: 700;
  color: var(--color-text-primary);
  transition: color 0.2s ease;
}

.mobile-nav__link:hover {
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Responsive — Tablet ve Mobil
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .site-header {
    padding: 12px 20px;
  }

  /* Masaüstü nav gizle */
  .site-header__nav {
    display: none;
  }

  /* Tema butonu mobilde de görünür kal */
  .site-header__right {
    gap: 0.75rem;
  }

  /* Hamburger göster */
  .hamburger {
    display: flex;
  }
}

@media (max-width: 480px) {
  .site-header {
    top: 10px;
    width: calc(100vw - 24px);
    padding: 10px 16px;
  }

  .site-header__logo {
    font-size: 0.95rem;
  }
}