.droidku-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--gap-lg);
}

.droidku-header-inner {
    display: flex;
    align-items: center;
    gap: var(--gap-sm);
    padding-block: var(--gap-sm);
    min-height: 64px;
    position: relative;
}

.droidku-header-nav-area {
    display: flex;
    align-items: center;
    gap: var(--gap-sm);
    flex: 1;
    min-width: 0;
    transition: opacity var(--duration) ease, visibility var(--duration) ease;
}

.droidku-header-nav-area.is-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    position: absolute;
}

.droidku-header-center {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    min-width: 0;
}

.droidku-logo img {
    height: 32px;
    width: auto;
}

.droidku-site-title a {
    font-size: var(--text-h1);
    font-weight: var(--fw-bold);
    letter-spacing: var(--tracking-tight);
    color: var(--color-ink);
}

.droidku-primary-nav {
    display: none;
    flex: 1;
    min-width: 0;
}

.droidku-menu {
    display: flex;
    gap: var(--gap-xs);
    flex-wrap: wrap;
    align-items: center;
}

.droidku-menu li a {
    display: inline-flex;
    align-items: center;
    padding: var(--gap-xs) var(--gap-sm);
    border-radius: 8px;
    font-size: var(--text-body);
    font-weight: var(--fw-medium);
    color: var(--color-ink-2);
    transition: background-color var(--duration) ease, color var(--duration) ease;
}

.droidku-menu li a:hover {
    background-color: var(--color-bg);
    color: var(--color-ink);
}

.droidku-menu li.current-menu-item a {
    background-color: var(--color-ink);
    color: var(--color-surface);
}

.droidku-mobile-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    color: var(--color-ink);
    transition: background-color var(--duration) ease;
    flex-shrink: 0;
}

.droidku-mobile-toggle:hover {
    background-color: var(--color-bg);
}

.droidku-search-area {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    position: relative;
}

.droidku-search-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    color: var(--color-ink);
    transition: background-color var(--duration) ease;
    flex-shrink: 0;
}

.droidku-search-toggle:hover {
    background-color: var(--color-bg);
}

.droidku-search-toggle.is-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.droidku-search-bar {
    display: none;
    align-items: center;
    gap: var(--gap-xs);
    width: 100%;
}

.droidku-search-form {
    flex: 1;
    min-width: 0;
    margin: 0;
    display: flex;
    align-items: center;
}

.droidku-search-input {
    flex: 1;
    min-width: 0;
    padding: var(--gap-xs) var(--gap-sm);
    border: none;
    border-radius: 8px;
    background: var(--color-bg);
    font-size: var(--text-body);
    line-height: var(--leading-normal);
    color: var(--color-ink);
    outline: none;
    font-family: inherit;
    transition: background-color var(--duration) ease;
}

.droidku-search-input:focus {
    background: var(--color-border);
}

.droidku-search-input::placeholder {
    color: var(--color-ink-3);
}

.droidku-search-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    color: var(--color-ink);
    transition: background-color var(--duration) ease;
    flex-shrink: 0;
}

.droidku-search-close:hover {
    background-color: var(--color-bg);
}

.droidku-header.is-searching .droidku-mobile-toggle,
.droidku-header.is-searching .droidku-header-center,
.droidku-header.is-searching .droidku-primary-nav,
.droidku-header.is-searching .droidku-search-toggle {
    display: none;
}

.droidku-header.is-searching .droidku-search-area {
    flex: 1;
}

.droidku-header.is-searching .droidku-search-bar {
    display: flex;
}

.droidku-mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 10, 10, 0.4);
    z-index: 1100;
    display: none;
}

.droidku-mobile-overlay.is-active {
    display: block;
}

.droidku-mobile-drawer {
    position: absolute;
    top: 0;
    left: 0;
    width: min(var(--drawer-width), 85vw);
    height: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.droidku-mobile-drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--gap-sm);
    padding-block: var(--gap-sm);
    padding-inline: var(--gap-md);
    min-height: 64px;
    border-bottom: 1px solid var(--color-border);
}

.droidku-mobile-drawer-title {
    flex: 1;
    min-width: 0;
}

.droidku-mobile-drawer-title .droidku-logo img {
    height: 32px;
}

.droidku-drawer-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    color: var(--color-ink);
    transition: background-color var(--duration) ease;
    flex-shrink: 0;
}

.droidku-drawer-close:hover {
    background-color: var(--color-bg);
}

.droidku-mobile-menu-list {
    display: flex;
    flex-direction: column;
    gap: var(--gap-xs);
    padding: var(--gap-md);
}

.droidku-mobile-menu-list li a {
    display: block;
    padding: var(--gap-xs) var(--gap-sm);
    border-radius: 8px;
    font-size: var(--text-body);
    font-weight: var(--fw-medium);
    color: var(--color-ink-2);
    transition: background-color var(--duration) ease, color var(--duration) ease;
}

.droidku-mobile-menu-list li a:hover {
    background-color: var(--color-bg);
    color: var(--color-ink);
}

.droidku-mobile-menu-list li.current-menu-item a {
    background-color: var(--color-ink);
    color: var(--color-surface);
}

@media (min-width: 768px) {
    .droidku-primary-nav {
        display: block;
        flex: 1;
    }

    .droidku-header-center {
        flex: 0 1 auto;
        justify-content: flex-start;
    }

    .droidku-header-inner {
        justify-content: flex-start;
    }

    .droidku-mobile-toggle {
        display: none;
    }
}