/* =============================================================
   header.css — NAVBAR + MOBILE MENU
   ============================================================= */

/* ── Navbar ── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  z-index: var(--z-nav);
  background: var(--nav-bg);
  border-bottom: 1px solid transparent;
  transition:
    background var(--transition-slow),
    border-color var(--transition-slow),
    box-shadow var(--transition-slow);
}

.navbar.is-scrolled {
  background: var(--nav-bg-scrolled);
  border-bottom-color: var(--border);
  box-shadow: 0 1px 20px rgba(0,0,0,0.12);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--page-pad-x);
  gap: var(--space-md);
}

/* ── Logo ── */
.nav-logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}

.nav-logo-img {
  width: 110px;
  height: auto;
  display: block;
  /* light mod: siyah logo olduğu gibi */
  filter: none;
  transition: filter var(--transition-slow);
}

/* dark mod: siyah logoyu beyaza çevir */
[data-theme="dark"] .nav-logo-img {
  filter: brightness(0) invert(1);
}

/* ── Nav links (desktop) ── */
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--nav-link-size);
  font-weight: var(--nav-link-weight);
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--text);
  background: var(--bg-card);
}

/* Active page highlight — Cursor style */
.nav-link.active {
  color: var(--text);
  background: var(--bg-card-hover);
  border: 1px solid var(--border);
}

/* ── Nav right: controls ── */
.nav-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

/* ── Theme toggle ── */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: color var(--transition), background var(--transition);
  cursor: pointer;
  background: none;
  border: none;
  font-size: 15px;
}

.theme-toggle:hover {
  color: var(--text);
  background: var(--bg-card);
}

.theme-toggle .icon-sun  { display: var(--theme-icon-sun);  }
.theme-toggle .icon-moon { display: var(--theme-icon-moon); }

/* ── Language selector ── */
.lang-selector {
  position: relative;
}

.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  font-size: var(--size-sm);
  font-weight: 500;
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--transition), background var(--transition);
}

.lang-btn:hover {
  color: var(--text);
  background: var(--bg-card);
}

.lang-btn .lang-flag { font-size: 14px; }
.lang-btn .lang-code { font-size: 12px; font-weight: 600; letter-spacing: 0.05em; }
.lang-btn .lang-caret {
  font-size: 9px;
  opacity: 0.5;
  transition: transform var(--transition);
}

.lang-selector.open .lang-caret { transform: rotate(180deg); }

.lang-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 120px;
  background: var(--modal-bg);
  border: 1px solid var(--modal-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
  overflow: hidden;
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
  z-index: 200;
}

.lang-selector.open .lang-dropdown {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  font-size: var(--size-sm);
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.lang-option:hover { background: var(--bg-card-hover); color: var(--text); }
.lang-option.active { color: var(--text); background: var(--accent-dim); }
.lang-option .flag { font-size: 14px; }

/* ── Auth buttons ── */
.nav-auth {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 36px;
  padding: 0 16px;
  border-radius: var(--radius-pill);
  font-size: var(--size-sm);
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition),
              background var(--transition), border-color var(--transition);
  text-decoration: none;
  border: 1px solid transparent;
}

.nav-btn-primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  border-color: var(--btn-primary-bg);
}

.nav-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.nav-btn-secondary {
  background: var(--btn-secondary-bg);
  color: var(--btn-secondary-text);
  border-color: var(--btn-secondary-border);
}

.nav-btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

/* ── Hamburger ── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 4px;
  cursor: pointer;
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
  z-index: calc(var(--z-mobile-menu) + 2);
  position: relative;
}

.hamburger:hover { background: var(--bg-card); }

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition-slow), opacity var(--transition),
              width var(--transition-slow);
}

/* Hamburger → X animation */
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; width: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile Menu — Full Screen Overlay ── */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-mobile-menu);
  background: var(--mobile-menu-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
  box-sizing: border-box;
  padding: calc(var(--nav-height) + 22px) 16px 24px;
  overflow-y: auto;

  /* Hidden state */
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition:
    opacity var(--transition-slow),
    transform var(--transition-slow);
}

.mobile-menu.active {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

/* Prevent body scroll when menu is open */
body.menu-open { overflow: hidden; }

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  width: 100%;
  padding: 0 18px;
}

.mobile-nav-link {
  display: block;
  width: 100%;
  max-width: 250px;
  text-align: center;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  background: var(--bg-card-hover);
  color: var(--text);
}

/* Mobile menu auth buttons */
.mobile-auth {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  width: 100%;
  padding: 0 18px;
}

.mobile-auth .nav-btn {
  width: 100%;
  max-width: 250px;
  height: 42px;
  font-size: var(--size-sm);
  justify-content: center;
}

/* Mobile menu lang/theme row */
.mobile-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin: 0 0 8px;
  min-height: 34px;
}

/* ── Responsive: mobile/tablet-safe header ── */
@media (max-width: 1023px), (max-device-width: 767px) {
  .navbar {
    background: var(--nav-bg-scrolled);
    border-bottom-color: var(--border);
    box-shadow: 0 1px 20px rgba(0,0,0,0.10);
    overflow: visible;
  }

  .navbar-inner {
    min-width: 0;
    padding: 0 max(14px, env(safe-area-inset-right)) 0 max(14px, env(safe-area-inset-left));
    gap: 8px;
  }

  .nav-logo {
    min-width: 0;
    max-width: 42vw;
  }

  .nav-logo-img {
    width: clamp(96px, 28vw, 112px);
    max-width: 100%;
  }

  .nav-links,
  .nav-controls > .nav-auth,
  .nav-controls > .lang-selector,
  .nav-controls > .theme-toggle {
    display: none !important;
  }

  .nav-controls {
    min-width: 44px;
    margin-left: auto;
    gap: 0;
  }

  .hamburger {
    display: flex !important;
    flex-shrink: 0;
  }

  .mobile-menu {
    display: flex;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    min-height: 100dvh;
  }

  .mobile-menu.active {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
  }

  .mobile-menu .theme-toggle {
    display: inline-flex !important;
    width: 30px;
    height: 30px;
    font-size: 14px;
  }

  .mobile-menu .lang-selector {
    display: block !important;
    position: relative;
  }

  .mobile-menu .lang-btn {
    height: 30px;
    padding: 0 7px;
    gap: 4px;
  }

  .mobile-menu .lang-btn .lang-flag { font-size: 12px; }
  .mobile-menu .lang-btn .lang-code {
    font-size: 11px;
    letter-spacing: 0;
  }
  .mobile-menu .lang-btn .lang-caret { font-size: 8px; }

  .mobile-menu .lang-dropdown {
    top: calc(100% + 8px);
    left: 50%;
    right: auto;
    min-width: 150px;
    transform: translate(-50%, -6px);
  }

  .mobile-menu .lang-selector.open .lang-dropdown {
    transform: translate(-50%, 0);
  }
}

@media (max-width: 380px) {
  .mobile-menu {
    gap: 8px;
    padding-top: calc(var(--nav-height) + 14px);
  }

  .mobile-nav-link {
    max-width: 230px;
    padding: 9px 14px;
    font-size: 17px;
  }

  .mobile-auth .nav-btn {
    max-width: 230px;
    height: 40px;
  }
}

@media (min-width: 1024px) and (max-width: 1180px) {
  .nav-links { gap: 0; }
  .nav-link  { padding: 6px 9px; font-size: 13px; }
  .nav-btn   { padding: 0 12px; font-size: 12px; }
}

@media (min-width: 1024px) and (min-device-width: 768px) {
  .hamburger    { display: none; }
  .mobile-menu  { display: none !important; }
}