/* ==============================================================
   KIWAG.com — Navigation (nav.css)
   Header, Hauptmenü, Untermenü, Mobile Hamburger
   ============================================================== */

/* --- Header --- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-dark);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* --- Logo --- */
.site-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.site-logo:hover {
    opacity: 0.85;
}

.logo-icon {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
}

.logo-text {
    font-family: var(--font-body);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: 0.02em;
}

.logo-ki {
    color: #2563EB;
}

/* --- Hauptnavigation (Desktop) --- */
.main-nav {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.main-nav a {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: color var(--transition-fast), background var(--transition-fast);
}

.main-nav a:hover {
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.08);
}

.main-nav a.active {
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.12);
}

/* --- Kategorie-Unternavigation --- */
.sub-nav {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    position: relative;
}

.sub-nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    min-height: 48px;
}

.sub-nav a {
    display: inline-flex;
    align-items: center;
    padding: 0.375rem 0.75rem;
    color: var(--color-text-soft);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    white-space: nowrap;
    text-decoration: none;
    transition: color var(--transition-fast), background var(--transition-fast);
}

.sub-nav a:hover {
    color: var(--accent);
    background: var(--accent-light);
}

.sub-nav a.active {
    color: var(--accent-dark);
    background: var(--accent-light);
    font-weight: 600;
}

/* Akzentlinie unter der Sub-Navigation */
.sub-nav::after {
    content: '';
    display: block;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent);
    opacity: 0.15;
}

/* --- Hamburger-Button (Mobile) --- */
.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
    color: var(--color-white);
}

.hamburger-icon {
    display: block;
    width: 24px;
    height: 2px;
    background: currentColor;
    position: relative;
    transition: background var(--transition-fast);
}

.hamburger-icon::before,
.hamburger-icon::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: currentColor;
    left: 0;
    transition: transform var(--transition-base);
}

.hamburger-icon::before { top: -7px; }
.hamburger-icon::after  { top: 7px; }

/* Hamburger X-Animation wenn geöffnet */
.hamburger.is-open .hamburger-icon {
    background: transparent;
}

.hamburger.is-open .hamburger-icon::before {
    transform: rotate(45deg);
    top: 0;
}

.hamburger.is-open .hamburger-icon::after {
    transform: rotate(-45deg);
    top: 0;
}

/* --- Mobile Navigation --- */
@media (max-width: 768px) {
    .hamburger {
        display: block;
    }

    .main-nav {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: var(--color-dark);
        flex-direction: column;
        padding: var(--space-md) var(--space-lg) var(--space-lg);
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        gap: var(--space-xs);
    }

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

    .main-nav a {
        width: 100%;
        padding: 0.75rem 1rem;
    }

    .sub-nav-inner {
        padding: 0 var(--space-md);
        gap: 0;
    }
}

/* --- Footer --- */
.site-footer {
    background: var(--color-dark);
    color: rgba(255, 255, 255, 0.6);
    padding: var(--space-3xl) 0 var(--space-xl);
    margin-top: var(--space-4xl);
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.footer-logo-icon {
    width: 28px;
    height: 28px;
}

.footer-logo-text {
    font-family: var(--font-body);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: 0.02em;
}

.logo-ki-footer {
    color: #60A5FA;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-col h4 {
    color: var(--color-white);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-md);
}

.footer-col a {
    display: block;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
    padding: 0.25rem 0;
    transition: color var(--transition-fast);
}

.footer-col a:hover {
    color: var(--color-white);
}

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8125rem;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.5);
    margin-left: var(--space-lg);
}

.footer-legal a:hover {
    color: var(--color-white);
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-xl);
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .footer-legal a {
        margin-left: var(--space-md);
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}