/* ==================================================
   NAVIGATION CSS
   Zweck: Sticky Navigation mit Button-Menü.
================================================== */

.site-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--color-menu-bg);
}

.nav-inner {
    min-height: 76px;
    padding: 0 20px;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 20px;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 800;
    color: #ffffff;
    white-space: nowrap;
}

.nav-menu {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.nav-item {
    position: relative;
}

.nav-item > a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 18px;
    font-size: 1.05rem;
    font-weight: 800;
    color: #ffffff;
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-button);
    background: transparent;
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.nav-item > a:hover,
.nav-item.is-active > a {
    transform: translateY(-2px);
    background: rgba(32, 54, 101, 0.28);
}

.dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    min-width: 210px;
    padding: 10px;
    background: var(--color-menu-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-button);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: 0.2s ease;
}

.dropdown a {
    display: block;
    padding: 9px 10px;
    color: #ffffff;
    border-radius: var(--radius-button);
}

.dropdown a:hover {
    background: rgba(32, 54, 101, 0.35);
}

.has-dropdown:hover .dropdown,
.has-dropdown:focus-within .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-button);
    background: transparent;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    margin: 5px auto;
    background: #ffffff;
}

@media (max-width: 900px) {
    .nav-inner {
        grid-template-columns: auto auto;
        justify-content: space-between;
    }

    .nav-toggle {
        display: block;
    }

    .nav-menu {
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 20px;
        background: var(--color-menu-bg);
    }

    .nav-menu.is-open {
        display: flex;
    }

    .nav-item > a {
        width: 100%;
    }

    .dropdown {
        position: static;
        min-width: 100%;
        margin-top: 8px;
        opacity: 1;
        visibility: visible;
        transform: none;
    }
}