/* ==========================================
   PVveda Design System - 100% Fixed Sticky Header with Transparent to White Transition
   ========================================== */

.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: background-color 0.3s ease, backdrop-filter 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

/* Scrolled State (Preserving backdrop blur) */
.app-header.header-scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
}

[data-theme="dark"] .app-header {
  background: rgba(15, 23, 42, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--border-color);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .app-header.header-scrolled {
  background: rgba(15, 23, 42, 0.94);
  border-bottom-color: var(--border-color);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
}

.app-header-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1.35rem 1.5rem; /* Mehr Padding oben & unten für eine höhere, luftigere Navbar */
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Brand Logo (Preserving user gap: 0.25rem!) */
.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  text-decoration: none;
  font-family: var(--font-family-base);
  letter-spacing: -0.02em;
}

.nav-brand-icon {
  width: 24px;
  height: 28px;
  display: block;
}

/* Größerer Schriftzug dahinter mit verfeinertem Inter Letter-Spacing */
.brand-text {
  font-family: var(--font-family-base);
  font-size: 1.95rem;
  line-height: 1;
  display: inline-flex;
  align-items: baseline;
  letter-spacing: -0.035em;
}

/* Markantes PV (ExtraBold 800 mit prägnant engem Spacing) */
.brand-pv-text {
  font-weight: 800;
  color: var(--logo-pv-color);
  letter-spacing: -0.045em;
}

/* Schlankes veda (Regular 400 in Unifarbe #2563EB aus dem SVG-Icon) */
.brand-veda-text {
  font-weight: 400;
  color: var(--logo-veda-color);
  background: none;
  -webkit-background-clip: unset;
  -webkit-text-fill-color: initial;
  display: inline-block;
  margin-left: 0.5px;
  letter-spacing: -0.02em;
}

/* Right Container (Nav Links + CTAs + Dark Light Button) */
.nav-right-group {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}

/* Navigation Links (font-weight: 400 & font-size: 1.0rem) */
.app-nav-menu {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  position: relative;
  text-decoration: none;
  font-size: 1.0rem;
  font-weight: 400;
  color: var(--nav-link-color);
  padding: 0.4rem 0;
  transition: color 0.2s ease;
}

/* Interaktiver Unterstrich beim Hover & Active */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2.5px;
  background: var(--nav-link-hover-color);
  border-radius: 99px;
  transform: scaleX(0);
  transform-origin: bottom left;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.2s ease;
}

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

.nav-link:hover::after {
  transform: scaleX(1);
  background: var(--nav-link-hover-color);
}

.nav-link.active {
  color: var(--nav-link-active-color);
  font-weight: 600;
}

.nav-link.active::after {
  transform: scaleX(1);
  background: var(--nav-link-active-color);
}

/* Dropdown Menu (Immer strahlend Weiß auch im Dark Mode!) */
.pv-nav-dropdown-group {
  position: relative;
}

.pv-dropdown-toggle {
  background: transparent;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.4rem 0.5rem;
}

/* Dropdown Icon Chevron ganz nah am Text */
.pv-dropdown-chevron {
  font-size: 0.75rem;
  margin-left: -0.22rem;
  opacity: 0.85;
}

.pv-nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  left: auto;
  transform: translateY(8px);
  background: #FFFFFF !important; /* Immer weißes Popup-Fenster */
  border: 1px solid #E2E8F0 !important;
  border-radius: var(--radius-md);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
  padding: 0.5rem;
  min-width: 240px;
  max-width: calc(100vw - 24px);
  width: max-content;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s ease;
  z-index: 1100;
}

/* Open State: Activated by JS Click Toggle on parent .pv-nav-dropdown-group.show */
.pv-nav-dropdown-group.show .pv-nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.pv-dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.85rem; /* Luftigerer Innenabstand im Dropdown */
  padding: 0.65rem 1.0rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: #18181B !important; /* Im Dropdown immer dunkler Text */
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
  transition: background 0.15s ease, color 0.15s ease;
}

.pv-dropdown-item:hover {
  background: #F1F5F9 !important;
  color: #4F46E5 !important;
}

.pv-dropdown-flag {
  width: 20px;
  height: 14px;
  border-radius: 2px;
  object-fit: cover;
}

/* Header Controls & Far-Right Buttons */
.nav-controls {
  display: flex;
  align-items: center;
  gap: 1.5rem; /* Größerer Abstand zwischen Anmelde-Button, Sprachauswahl & Dark/Light Toggle */
}

/* Mobile Nav & Dropdown Helper Classes (Zero Inline Styles) */
.pv-dropdown-item-warning {
  color: #D97706 !important;
  background-color: rgba(245, 158, 11, 0.08) !important;
  font-weight: 600 !important;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

.mobile-nav-link {
  font-size: 1.1rem;
}

.mobile-brand-white {
  color: #FFFFFF !important;
}

.btn-danger-text {
  color: #DC2626 !important;
}

/* Höherer Anmelde-Button in der Navbar */
.nav-controls .pv-btn {
  padding: 0.65rem 1.35rem; /* Höhere vertikale Polsterung */
  font-size: 0.92rem;
  line-height: 1.2;
}

/* User Profile Pulldown in Navbar */
.user-profile-toggle {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-md);
  transition: background 0.2s ease;
}

.user-profile-toggle:hover {
  background: rgba(99, 102, 241, 0.08);
}

.user-avatar-img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary);
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.2);
}

.user-avatar-fallback {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6366F1 0%, #4F46E5 100%);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.user-dropdown-name {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text-heading);
}

.user-menu-header {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid #E2E8F0;
  margin-bottom: 0.35rem;
}

.user-menu-title {
  font-weight: 700;
  font-size: 0.92rem;
  color: #0F172A;
}

.user-menu-email {
  font-size: 0.8rem;
  color: #64748B;
  word-break: break-all;
}

.user-menu-divider {
  height: 1px;
  background: #E2E8F0;
  margin: 0.35rem 0;
}

.user-dropdown-logout {
  color: #EF4444 !important;
}

.user-dropdown-logout:hover {
  background: #FEF2F2 !important;
  color: #DC2626 !important;
}

/* Flat Icon Theme Toggle Button (Ohne Rahmen/Button-Box wie Sprachauswahl) */
.theme-toggle-btn {
  background: transparent;
  border: none;
  box-shadow: none;
  color: var(--text-muted);
  padding: 0.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: color 0.2s ease;
}

.theme-toggle-btn:hover {
  color: var(--nav-link-hover-color);
  background: transparent;
  border: none;
}

/* Mobile / Desktop Display Rules */
.pv-mobile-only { display: none !important; }
.pv-desktop-only { display: flex !important; }

.hamburger-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 4px;
  padding: 6px;
}

.hamburger-bar {
  width: 22px;
  height: 2px;
  background: var(--text-heading);
  border-radius: 2px;
}

.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: var(--bg-surface) !important;
  z-index: 99999 !important; /* Sitzt VOLLSTÄNDIG über dem Header */
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  visibility: hidden;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.3s ease;
}

.mobile-menu-overlay.active {
  transform: translateX(0);
  visibility: visible;
}

.mobile-menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  width: 100%;
}

.mobile-menu-close {
  background: transparent;
  border: none;
  font-size: 2.2rem;
  line-height: 1;
  color: var(--text-heading);
  cursor: pointer;
  padding: 0.5rem;
}

/* Responsive Rules for Mobile Navigation Bar Header */
@media (max-width: 900px) {
  .pv-desktop-only { display: none !important; }
  .pv-mobile-only { display: flex !important; }
  
  .app-header-container {
    padding: 0.85rem 1.0rem; /* Schlanker Header auf Mobilgeräten */
  }

  .brand-text {
    font-size: 1.4rem; /* Kompakterer Logo-Schriftzug auf Handy */
  }

  .nav-brand-icon {
    width: 20px;
    height: 23px;
  }

  .nav-controls {
    gap: 0.5rem; /* Engerer Abstand für die Buttons rechts */
  }

  .nav-controls .pv-btn {
    padding: 0.4rem 0.75rem;
    font-size: 0.82rem;
  }

  .user-profile-toggle {
    padding: 0.2rem 0.35rem;
    gap: 0.25rem;
  }

  .user-avatar-img,
  .user-avatar-fallback {
    width: 30px;
    height: 30px;
    font-size: 0.85rem;
  }
}

@media (max-width: 400px) {
  .brand-text {
    font-size: 1.25rem;
  }

  .nav-controls {
    gap: 0.35rem;
  }

  .app-header-container {
    padding: 0.75rem 0.5rem;
  }
}

/* Mobile Drawer Settings & Controls */
.mobile-drawer-theme-btn {
  width: 100%;
  display: flex !important;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1rem;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md, 8px);
  color: var(--text-heading);
  font-weight: 600;
  font-size: 0.9rem;
}

.active-lang-btn {
  border-color: var(--primary) !important;
  background: var(--bg-card-subtle) !important;
  font-weight: 700 !important;
  color: var(--primary) !important;
}

/* Mobile Drawer Language Button Row & Responsive Wrapping */
.mobile-lang-btn-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.mobile-lang-btn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.45rem 0.35rem !important;
  font-size: 0.8rem;
}

/* Ultra-narrow screens (<= 340px): Wrap language code letters under the flag */
@media (max-width: 340px) {
  .mobile-lang-btn {
    flex-direction: column !important;
    gap: 0.15rem !important;
    padding: 0.35rem 0.25rem !important;
  }

  .mobile-lang-btn .pv-dropdown-flag {
    margin-right: 0 !important;
  }

  .mobile-lang-btn span {
    font-size: 0.72rem !important;
  }
}