:root {
    --navbar-height: 70px;
}

/* ========================================
   Navbar Base
   ======================================== */
#top-navbar {
    width: 100%;
    background: rgba(5, 11, 26, 0.82);
    backdrop-filter: saturate(160%) blur(14px);
    -webkit-backdrop-filter: saturate(160%) blur(14px);
    border-bottom: 1px solid var(--border);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--gutter);
    height: var(--navbar-height);
}

/* ========================================
   Logo
   ======================================== */
.logo a {
    text-decoration: none;
    display: flex;
    align-items: center;
}

.logo a img {
    height: 34px;
    width: auto;
    max-height: 34px;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.logo a:hover img {
    opacity: 0.9;
    transform: scale(1.05);
}

/* ========================================
   Navigation Links
   ======================================== */
.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
    margin: 0 auto;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.01em;
    transition: color 0.2s ease;
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-brand);
    transition: width 0.3s ease;
    border-radius: 2px;
}

.nav-links a:hover {
    color: #fff;
}

.nav-links a.active {
    color: #fff;
}

.nav-links a.active::after {
    width: 100%;
}

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

/* ========================================
   Nav Dropdown Links
   ======================================== */
.nav-links .dropdown-link {
    position: relative;
}

.nav-links .dropdown-link > a {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    letter-spacing: 0.3px;
    transition: color 0.3s ease;
    padding: 0.5rem 0;
    cursor: pointer;
}

.nav-links .dropdown-link > a:hover {
    color: #fff;
}

.nav-links .dropdown-link > a::after {
    display: none;
}

.nav-links .dropdown-content {
    position: absolute;
    top: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    background: rgba(10, 18, 38, 0.98);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    z-index: 1000;
}

.nav-links .dropdown-link:hover .dropdown-content {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.nav-links .dropdown-content a {
    display: block;
    padding: 0.875rem 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.nav-links .dropdown-content a::after {
    display: none;
}

.nav-links .dropdown-content a:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
}

.nav-links .dropdown-content a i {
    width: 20px;
    margin-right: 0.5rem;
    color: rgba(255, 255, 255, 0.6);
    transition: color 0.2s ease;
}

.nav-links .dropdown-content a:hover i {
    color: #fff;
}

/* Nav Icons */
.nav-links a i:first-child {
    margin-right: 0.5rem;
}

.nav-links .dropdown-link > a i.fa-chevron-down {
    margin-left: 0.25rem;
    margin-right: 0;
    transition: transform 0.3s ease;
}

.nav-links .dropdown-link:hover > a i.fa-chevron-down {
    transform: rotate(180deg);
}

/* Nav Back Button */
.nav-links .nav-back-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem !important;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    color: rgba(255, 255, 255, 0.8) !important;
    font-weight: 500;
    font-size: 14px;
    transition: all 0.3s ease;
}

.nav-links .nav-back-btn::after {
    display: none;
}

.nav-links .nav-back-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.25);
    color: #fff !important;
    transform: translateY(-1px);
}

/* ========================================
   User Section
   ======================================== */
.user-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.language-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.5rem;
    color: rgba(255, 255, 255, 0.55);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    cursor: pointer;
    font: inherit;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    transition: background 0.2s ease, border-color 0.2s ease;
}

.language-toggle:hover {
    background: rgba(255, 255, 255, 0.09);
    border-color: rgba(255, 255, 255, 0.22);
}

.language-toggle:focus-visible {
    outline: 2px solid #22d3ee;
    outline-offset: 2px;
}

.language-toggle__label {
    min-width: 1.35rem;
    text-align: center;
    transition: color 0.2s ease;
}

.language-toggle__label.active {
    color: #fff;
}

.language-toggle__track {
    position: relative;
    width: 2.1rem;
    height: 1.15rem;
    background: rgba(255, 255, 255, 0.14);
    border-radius: 999px;
}

.language-toggle__thumb {
    position: absolute;
    top: 0.175rem;
    left: 0.2rem;
    width: 0.8rem;
    height: 0.8rem;
    background: linear-gradient(135deg, #22d3ee, #a855f7);
    border-radius: 50%;
    box-shadow: 0 1px 5px rgba(6, 182, 212, 0.55);
    transition: transform 0.2s ease;
}

.language-toggle--de .language-toggle__thumb {
    transform: translateX(0.9rem);
}

.language-switch--mobile {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.75rem 1rem;
    color: rgba(255, 255, 255, 0.8);
}

/* Auth Buttons (Not Logged In) */
.auth-buttons {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.nav-login {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-muted);
    transition: color 0.2s ease, background 0.2s ease;
}

.nav-login:hover {
    color: var(--text);
    background: var(--surface-hover);
}

.nav-cta {
    flex-shrink: 0;
}

.user-section {
    margin-left: auto;
}

/* User Profile Dropdown */
.user-profile-dropdown {
    position: relative;
}

.user-profile-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: #fff;
}

.user-profile-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, #06b6d4, #22d3ee);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.user-avatar i {
    font-size: 18px;
    color: #fff;
}

.user-name {
    font-weight: 600;
    font-size: 14px;
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.dropdown-icon {
    font-size: 12px;
    transition: transform 0.3s ease;
}

.user-profile-btn:hover .dropdown-icon {
    transform: translateY(2px);
}

/* User Dropdown Content */
.user-dropdown-content {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: rgba(10, 18, 38, 0.98);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    overflow: hidden;
}

.user-dropdown-content.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.2s ease;
    font-size: 14px;
    font-weight: 500;
}

.dropdown-item i {
    width: 20px;
    font-size: 16px;
    color: rgba(255, 255, 255, 0.6);
}

.dropdown-item:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
}

.dropdown-item:hover i {
    color: #fff;
}

.dropdown-item.logout {
    color: rgba(239, 68, 68, 0.9);
}

.dropdown-item.logout i {
    color: rgba(239, 68, 68, 0.8);
}

.dropdown-item.logout:hover {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

.dropdown-item.logout:hover i {
    color: #ef4444;
}

.dropdown-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: 0.5rem 0;
}

/* ========================================
   Hamburger Menu
   ======================================== */
.hamburger {
    display: none;
    font: inherit;
    font-size: 1.5rem;
    line-height: 1;
    color: #fff;
    background: none;
    border: 0;
    cursor: pointer;
    padding: 0.5rem;
    transition: transform 0.3s ease;
}

.hamburger:focus-visible {
    outline: 2px solid #22d3ee;
    outline-offset: 2px;
    border-radius: 6px;
}

.hamburger:hover {
    transform: scale(1.1);
}

/* ========================================
   Mobile Menu
   ======================================== */
.mobile-menu {
    position: absolute;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    background: rgba(5, 11, 26, 0.98);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.mobile-menu.active {
    max-height: 600px;
}

.mobile-nav-links {
    padding: 1.5rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.mobile-nav-links > a {
    padding: 1rem 0;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: color 0.3s ease, padding-left 0.3s ease;
}

.mobile-nav-links > a:hover {
    color: #fff;
    padding-left: 0.5rem;
}

.mobile-nav-links > a.active {
    color: #fff;
    padding-left: 0.5rem;
    border-left: 3px solid #22d3ee;
    padding-left: calc(0.5rem + 12px);
    background: rgba(6, 182, 212, 0.08);
}

/* Mobile User Section */
.mobile-user-section {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 2px solid rgba(255, 255, 255, 0.1);
}

.mobile-user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    margin-bottom: 1rem;
}

.mobile-user-section a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    border-radius: 8px;
    transition: all 0.3s ease;
    margin-bottom: 0.5rem;
}

.mobile-user-section a:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
}

.mobile-user-section a.logout {
    color: rgba(239, 68, 68, 0.9);
    background: rgba(239, 68, 68, 0.05);
}

.mobile-user-section a.logout:hover {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}

/* Mobile Auth Buttons */
.mobile-auth-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.5rem;
}

.mobile-auth-buttons .btn {
    width: 100%;
    text-align: center;
    padding: 1rem;
    border-radius: 8px;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 900px) {
    .navbar-container {
        padding: 0 1.5rem;
    }

    .nav-links,
    .user-section,
    .nav-cta {
        display: none;
    }

    .hamburger {
        display: block;
    }
}

@media (max-width: 600px) {
    .navbar-container {
        padding: 0 1rem;
    }

    .logo a img {
        max-height: 35px;
    }

    .mobile-nav-links {
        padding: 1rem 1.5rem;
    }
}

/* ========================================
   Mobile Dropdown Support
   ======================================== */
.mobile-nav-links .dropdown-link {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mobile-nav-links .dropdown-link > a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    cursor: pointer;
    transition: color 0.3s ease;
}

.mobile-nav-links .dropdown-link > a:hover {
    color: #fff;
}

.mobile-nav-links .dropdown-link > a i.fa-chevron-down {
    transition: transform 0.3s ease;
}

.mobile-nav-links .dropdown-link.active > a i.fa-chevron-down {
    transform: rotate(180deg);
}

.mobile-nav-links .dropdown-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding-left: 1rem;
}

.mobile-nav-links .dropdown-link.active .dropdown-content {
    max-height: 200px;
}

.mobile-nav-links .dropdown-content a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.mobile-nav-links .dropdown-content a:hover {
    color: #fff;
}

.mobile-nav-links .dropdown-content a i {
    width: 18px;
}

.mobile-nav-links .nav-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    padding: 0.75rem 1.5rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
    font-size: 14px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.mobile-nav-links .nav-back-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
}