.base-header {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border-light);
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px var(--shadow-color-xs);
    max-width: 1600px;
    margin: 0 auto;
    width: 100%;
    overflow-x: clip;
    overflow-y: visible;
    box-sizing: border-box;
}


.base-header-nav {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    display: flex;
    gap: 15px;
}

.base-nav-link {
    font-family: var(--font-family-primary);
    text-decoration: none;
    color: var(--color-text);
    padding: 8px 16px;
    border-radius: 6px;
    transition: all 0.2s ease;
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-base);
}

.base-nav-link:hover {
    color: var(--color-primary);
    background-color: var(--color-hover-overlay);
}

.base-nav-dropdown {
    position: relative;
    display: inline-block;
}

.base-nav-link-dropdown {
    position: relative;
}

.base-nav-dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--color-background);
    border: 1px solid var(--color-border);
    min-width: 200px;
    margin-top: 5px;
    box-shadow: 0 4px 6px var(--shadow-color-sm);
    z-index: 1000;
    padding: 8px 0;
}

.base-nav-dropdown:hover .base-nav-dropdown-menu {
    display: block;
}

.base-nav-dropdown-link {
    display: block;
    padding: 10px 16px;
    color: var(--color-text);
    text-decoration: none;
    font-size: var(--font-size-base);
    transition: all 0.2s ease;
}

.base-nav-dropdown-link:hover {
    background-color: var(--color-hover-overlay);
    color: var(--color-primary);
}

.base-header-actions {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    display: flex;
    gap: 10px;
    align-items: center;
}

.base-mobile-nav-toggle {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: 8px;
    background: none;
    border: 1px solid var(--color-border);
    cursor: pointer;
    border-radius: 4px;
    position: relative;
    z-index: 1001;
}

.base-mobile-nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--color-text);
    transition: all 0.3s ease;
}

.base-mobile-nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.base-mobile-nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.base-mobile-nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

.base-header-user-avatar {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    display: flex;
    align-items: center;
}

.base-header-user-avatar-display {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--color-border);
}

.base-header-user-avatar-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.base-header-user-avatar-placeholder {
    font-family: var(--font-family-primary);
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-avatar);
    text-transform: uppercase;
}

/* Mobile menu overlay */
.base-mobile-nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.base-mobile-nav-overlay.active {
    display: block;
    opacity: 1;
    pointer-events: auto;
}

/* Mobile (max-width: 576px) */
@media (max-width: 576px) {
    .base-header {
        padding: 12px 20px;
        position: relative;
    }
    
    .base-header-actions {
        order: 3;
        margin-left: auto;
    }
    
    .base-mobile-nav-toggle {
        display: flex;
        order: 3;
    }
    
    .base-header-nav {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        background: var(--color-background);
        padding: 60px 20px 20px 20px;
        max-width: 100%;
        z-index: 1000;
        overflow-y: auto;
        box-shadow: 0 4px 12px var(--shadow-color-xl);
    }
    
    .base-header-nav.open {
        display: flex;
    }
    
    .base-mobile-nav-overlay {
        display: none;
        pointer-events: none;
    }
    
    .base-mobile-nav-overlay.active {
        display: block;
        opacity: 1;
        pointer-events: auto;
    }
    
    .base-nav-link {
        padding: 12px;
        font-size: var(--font-size-small);
    }
    
    .base-nav-dropdown-menu {
        position: static;
        display: none;
        border: none;
        box-shadow: none;
        padding: 0;
        margin-top: 0;
    }
    
    .base-nav-dropdown.open .base-nav-dropdown-menu {
        display: block;
    }
    
    .base-nav-dropdown-link {
        padding: 8px 20px;
        font-size: var(--font-size-small);
    }
    
    .base-header-user-avatar {
        display: none;
    }
}

/* Tablet/iPad (577px–1024px) – Hamburger-Menü auch auf iPad */
@media (min-width: 577px) and (max-width: 1024px) {
    .base-header {
        padding: 15px 20px;
        position: relative;
    }
    
    .base-header-actions {
        order: 3;
        margin-left: auto;
    }
    
    .base-mobile-nav-toggle {
        display: flex;
        order: 3;
    }
    
    .base-header-nav {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        background: var(--color-background);
        padding: 60px 20px 20px 20px;
        max-width: 100%;
        z-index: 1000;
        overflow-y: auto;
        box-shadow: 0 4px 12px var(--shadow-color-xl);
    }
    
    .base-header-nav.open {
        display: flex;
    }
    
    .base-mobile-nav-overlay {
        display: none;
        pointer-events: none;
    }
    
    .base-mobile-nav-overlay.active {
        display: block;
        opacity: 1;
        pointer-events: auto;
    }
    
    .base-nav-link {
        padding: 12px;
    }
    
    .base-nav-dropdown-menu {
        position: static;
        display: none;
        border: none;
        box-shadow: none;
        padding: 0;
        margin-top: 0;
    }
    
    .base-nav-dropdown.open .base-nav-dropdown-menu {
        display: block;
    }
    
    .base-nav-dropdown-link {
        padding: 8px 20px;
    }
    
    .base-header-user-avatar {
        display: none;
    }
}

/* Kleiner Desktop/13-Zoll (1024px–1366px) */
@media (min-width: 1024px) and (max-width: 1366px) {
    .base-header {
        padding: 18px 20px;
    }
}

/* Großer Desktop/Widescreen (min-width: 1440px) */
@media (min-width: 1440px) {
    .base-header {
        padding: 20px 30px;
    }
}