/* ========== SHARED NAVIGATION BAR ==========
   Tüm sayfalarda aynı üst bar.
   Ana sayfada .nav--home class'ı ile animasyon eklenir.
   ============================================= */

/* --- Toggle Variables (Light) --- */
:root {
  --surface-background: linear-gradient(90deg, rgba(240, 224, 210, 1) 0 50%, rgba(218, 233, 240, 1) 50% 100%);
  --surface-elevated: linear-gradient(135deg, #fffdfb 0%, #f2eae3 100%);
  --surface-inset-border: rgba(48, 31, 18, 0.1);
  --surface-divider: rgba(48, 31, 18, 0.08);
  --surface-highlight: rgba(255, 255, 255, 0.38);
  --surface-highlight-strong: rgba(255, 255, 255, 0.42);
  --active-pill-background: linear-gradient(135deg, #fffdfb 0%, #f2eae3 100%);
  --active-pill-border: rgba(48, 31, 18, 0.06);
  --soft-shadow: 0 6px 16px rgba(48, 31, 18, 0.14);
  --soft-shadow-hover: 0 10px 22px rgba(48, 31, 18, 0.12);
  --muted-control-color: var(--gray-500);
}

/* --- Toggle Variables (Dark) --- */
[data-theme="dark"] {
  --surface-background: linear-gradient(90deg, rgba(45, 35, 28, 1) 0 50%, rgba(22, 38, 48, 1) 50% 100%);
  --surface-elevated: linear-gradient(135deg, rgba(17, 25, 30, 0.94) 0%, rgba(11, 18, 23, 0.98) 100%);
  --surface-inset-border: rgba(116, 183, 210, 0.16);
  --surface-divider: rgba(255, 255, 255, 0.1);
  --surface-highlight: rgba(255, 255, 255, 0.08);
  --surface-highlight-strong: rgba(255, 255, 255, 0.1);
  --active-pill-background: linear-gradient(135deg, #edf5f8 0%, #d9e8ef 100%);
  --active-pill-border: rgba(116, 183, 210, 0.14);
  --soft-shadow: 0 6px 18px rgba(0, 0, 0, 0.24);
  --soft-shadow-hover: 0 10px 22px rgba(3, 12, 18, 0.28);
  --muted-control-color: rgba(240, 240, 240, 0.68);
}

/* --- View Transitions --- */
@view-transition {
  navigation: auto;
}

::view-transition-old(main-nav),
::view-transition-new(main-nav) {
  animation: none;
}

::view-transition-group(main-nav) {
  animation-duration: 0s;
}

/* --- Nav Animation Keyframe --- */
@keyframes fadeSlideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* --- Nav Container --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(248, 248, 248, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: background 0.3s ease, box-shadow 0.3s ease;
  view-transition-name: main-nav;
}

[data-theme="dark"] .nav {
  background: rgba(20, 20, 20, 0.9);
}

.nav.scrolled {
  background: rgba(248, 248, 248, 0.95);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .nav.scrolled {
  background: rgba(20, 20, 20, 0.95);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* Desktop + tablet: fully transparent nav */
@media (min-width: 769px) {
  .nav,
  [data-theme="dark"] .nav,
  .nav.scrolled,
  [data-theme="dark"] .nav.scrolled {
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: none;
  }
}

/* --- Nav Inner --- */
.nav-inner {
  max-width: var(--content-max, 1200px);
  margin: 0 auto;
  padding: 0 20px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* --- Logo --- */
.nav-logo {
  font-family: 'Outfit', sans-serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--gray-900);
  letter-spacing: -0.03em;
  cursor: pointer;
  transition: color 0.25s;
  text-decoration: none;
}

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

/* --- Nav Menu --- */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
}

/* --- Nav Link --- */
.nav-link {
  font-family: 'Outfit', sans-serif;
  font-size: 16px;
  font-weight: 300;
  color: var(--gray-500);
  cursor: pointer;
  transition: color 0.25s;
  letter-spacing: -0.03em;
  text-decoration: none;
  background: none;
  border: none;
  padding: 0;
}

.nav-link:hover {
  color: var(--gray-900);
}

.nav-link.active {
  color: var(--gray-900);
}

/* --- Theme Toggle --- */
.theme-toggle {
  width: 62px;
  height: 28px;
  padding: 3px;
  border: 1px solid var(--surface-inset-border);
  border-radius: 999px;
  background: var(--surface-background);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
  box-shadow: inset 0 1px 0 var(--surface-highlight);
  transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.2s ease;
}

.theme-toggle::after {
  content: '';
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 50%;
  width: 1px;
  background: var(--surface-divider);
  transform: translateX(-50%);
  pointer-events: none;
}

.theme-toggle:hover {
  transform: translateY(-1px);
  box-shadow: inset 0 1px 0 var(--surface-highlight-strong), var(--soft-shadow-hover);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.theme-toggle-core {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 24px;
  height: 20px;
  border-radius: 999px;
  background: var(--active-pill-background);
  border: 1px solid var(--active-pill-border);
  box-shadow: var(--soft-shadow);
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

/* Dark toggle */
[data-theme="dark"] .theme-toggle {
  background: var(--surface-background);
  border-color: var(--surface-inset-border);
  box-shadow: inset 0 1px 0 var(--surface-highlight);
}

[data-theme="dark"] .theme-toggle::after {
  background: var(--surface-divider);
}

[data-theme="dark"] .theme-toggle:hover {
  box-shadow: inset 0 1px 0 var(--surface-highlight-strong), var(--soft-shadow-hover);
}

[data-theme="dark"] .theme-toggle .theme-toggle-core {
  transform: translateX(32px);
  background: var(--active-pill-background);
  border-color: var(--active-pill-border);
  box-shadow: var(--soft-shadow);
}

/* --- Theme Icons --- */
.theme-icon {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
  pointer-events: none;
  opacity: 0.45;
  transition: opacity 0.25s ease;
}

.theme-icon-sun {
  left: 8px;
  color: #b07030;
}

.theme-icon-moon {
  right: 8px;
  color: #4a8aa8;
}

[data-theme="dark"] .theme-icon-sun {
  opacity: 0.3;
  color: #9a7050;
}

[data-theme="dark"] .theme-icon-moon {
  opacity: 0.6;
  color: #74b7d2;
}

/* --- Homepage Animations (only when .nav--home is present) --- */
.nav--home .nav-logo {
  opacity: 0;
  animation: fadeSlideDown 0.5s ease 0.1s forwards;
}

.nav--home .nav-link {
  opacity: 0;
  animation: fadeSlideDown 0.5s ease 0.15s forwards;
}

.nav--home .theme-toggle {
  opacity: 0;
  animation: fadeSlideDown 0.5s ease 0.35s forwards;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav-menu { gap: 20px; }
  .nav-link { font-size: 16px; }
}