/**
 * Navigation Styles - Premium Design
 * Header, Logo, Navigation Links und Mobile Menu
 */

nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.5) 0%, rgba(0, 0, 0, 0.2) 70%, transparent 100%);
    padding: 24px var(--spacing-2xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    transition: all 0.4s ease;
}

/* Scrolled state - white background */
nav.scrolled {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    padding: 16px var(--spacing-2xl);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
}

nav.scrolled .logo {
    color: var(--primary-color);
}

nav.scrolled .nav-links a {
    color: var(--text-color);
}

nav.scrolled .social-links a {
    color: var(--text-color);
}

/* Light header pages (subpages without dark hero) */
body.has-light-header nav {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
}

body.has-light-header nav .logo {
    color: var(--primary-color);
}

body.has-light-header nav .nav-links a {
    color: var(--text-color);
}

body.has-light-header nav .social-links a {
    color: var(--text-color);
    background: var(--bg-light);
}

body.has-light-header nav .mobile-menu-toggle {
    color: var(--primary-color);
}

/* Navigation versteckt beim Scrollen nach unten */
nav.hidden {
    transform: translateY(-100%);
}

.logo {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 500;
    letter-spacing: 0;
    color: white;
    text-decoration: none;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

@media (max-width: 900px) {
    .logo {
        font-size: 17px;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 14px;
    }
}

.logo:hover {
    opacity: 0.8;
}

/* Navigation Links */
.nav-links {
    display: flex;
    gap: 40px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: all var(--transition-normal);
    position: relative;
    padding: 8px 0;
}

.nav-links a.active {
    color: white;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: currentColor;
    transition: width var(--transition-normal);
}

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

nav.scrolled .nav-links a:hover {
    color: var(--primary-color);
}

/* Social Links */
.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 18px;
    transition: all var(--transition-normal);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
}

.social-links a:hover {
    color: white;
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

nav.scrolled .social-links a {
    color: var(--text-color);
    background: var(--bg-light);
}

nav.scrolled .social-links a:hover {
    color: var(--primary-color);
    background: var(--border-color);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    font-size: 22px;
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    padding: 8px;
    transition: color var(--transition-normal);
}

nav.scrolled .mobile-menu-toggle {
    color: var(--primary-color);
}

/* Mobile Responsive */
@media (max-width: 1024px) {
    nav {
        padding: 20px var(--spacing-lg);
    }

    nav.scrolled {
        padding: 14px var(--spacing-lg);
    }

    .nav-links {
        gap: 24px;
    }

    .social-links {
        display: none;
    }
}

@media (max-width: 768px) {
    nav {
        padding: 16px var(--spacing-md);
    }

    /* Fullscreen Overlay Menü */
    .nav-links {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        padding: 80px var(--spacing-lg) var(--spacing-lg);
        gap: 8px;
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-20px);
        transition: opacity 0.35s ease, transform 0.35s ease, visibility 0.35s;
    }

    .nav-links.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .nav-links li {
        width: 100%;
        max-width: 400px;
        text-align: center;
        opacity: 0;
        transform: translateY(12px);
        transition: opacity 0.35s ease, transform 0.35s ease;
    }

    .nav-links.active li {
        opacity: 1;
        transform: translateY(0);
    }
    .nav-links.active li:nth-child(1) { transition-delay: 0.08s; }
    .nav-links.active li:nth-child(2) { transition-delay: 0.14s; }
    .nav-links.active li:nth-child(3) { transition-delay: 0.20s; }
    .nav-links.active li:nth-child(4) { transition-delay: 0.26s; }
    .nav-links.active li:nth-child(5) { transition-delay: 0.32s; }

    .nav-links a {
        color: var(--text-color);
        display: block;
        padding: 20px 0;
        border-bottom: 1px solid rgba(0, 0, 0, 0.08);
        font-size: 22px;
        font-family: var(--font-heading);
        font-weight: 400;
        letter-spacing: 0.3px;
    }

    .nav-links li:last-child a {
        border-bottom: none;
    }

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

    .nav-links a:hover,
    .nav-links a.active {
        color: var(--primary-color);
        opacity: 0.7;
    }

    /* Menü-Button immer sichtbar, über Overlay */
    .mobile-menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
        z-index: 1001;
        font-size: 24px;
    }

    /* Body-Scroll sperren wenn Menü offen */
    body.menu-open {
        overflow: hidden;
    }
}