/* ====================================
   Visualisierungs-Portfolio - Privacy-First
   Keine externen Ressourcen, Vanilla CSS
   ==================================== */

/* === CSS Reset & Base === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Farben */
/*    --color-primary: #2c3e50;
    --color-secondary: #34495e;
    --color-accent: #3498db;
    --color-text: #333;
    --color-text-light: #666;
    --color-bg: #fff;
    --color-bg-alt: #f8f9fa;
    --color-border: #ddd;
*/
    --color-primary: #310a31ff;
    --color-secondary: #88b7b5ff;
    --color-accent: #847996ff;
    --color-text: #f4ecd6ff;
    --color-text-light: #ddd;
    --color-bg:  #310a31ff;
    --color-bg-alt: #847996ff;
    --color-border: #f4ecd6ff;
    --muted-teal-2: #a7cab1ff;



    /* Abstände */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;

    /* Schrift */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-size-base: 16px;
    --line-height: 1.6;

    /* Breakpoints */
    --breakpoint-tablet: 768px;
    --breakpoint-desktop: 1200px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--color-text);
    background: var(--color-bg);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* === Skip Link (Accessibility) === */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-accent);
    color: white;
    padding: 8px 16px;
    text-decoration: none;
    border-radius: 0 0 4px 0;
    z-index: 1000;
    transition: top 0.2s;
}

.skip-link:focus {
    top: 0;
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* === Header & Navigation === */
.site-header {
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-sm) 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.site-title {
    font-size: 1.5rem;
    font-weight: 600;
}

.site-title a {
    color: white;
    text-decoration: none;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.main-nav a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    transition: background 0.3s, color 0.3s;
}

.main-nav a:hover,
.main-nav a.active {
    background: var(--color-accent);
    color: white;
}

/* === Main Content === */
.site-main {
    min-height: calc(100vh - 200px);
    padding: var(--spacing-lg) 0;
}

/* === Hero Section (Index) === */
.hero {
    text-align: center;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    color:
    color: var(--muted-teal-2);
}

.hero p {
    font-size: 1.2rem;
    color: var(--color-text);
/*    color: var(--color-text-light);
*/}

/* === Category Grid (Index) === */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.category-card {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
}

.card-link {
    display: block;
    padding: var(--spacing-md);
    text-decoration: none;
    color: var(--color-text);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    position: relative;
    display: inline-block;
}

.card-icon .advantage-icon {
    display: block;
    transition: opacity 0.3s ease;
}

.card-icon .advantage-icon.hover {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
}

.category-card:hover .advantage-icon.default {
    opacity: 0;
}

.category-card:hover .advantage-icon.hover {
    opacity: 1;
}




.category-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.category-card p {
    color: var(--color-text-light);
}

/* === Page Header === */
.page-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.page-header h2 {
    font-size: 2rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
}

.page-header p {
    color: var(--color-text-light);
    font-size: 1.1rem;
}

/* === 360° Page === */
.advantages {
    background: var(--color-bg-alt);
    padding: var(--spacing-lg);
    border-radius: 8px;
    margin-bottom: var(--spacing-lg);
}

.advantages h3 {
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.advantage-item {
    text-align: justify;
}

.advantage-icon {
    width: auto;
    height: 64px;
    display: block;
    margin: 0 auto var(--spacing-sm);
    object-fit: contain;
}

.advantage-item h4 {
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.advantage-item p {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.filter-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-border);
}

.filter-buttons {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    text-decoration: none;
    color: var(--color-text);
    background: white;
    transition: all 0.3s;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.project-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.1);
}

.project-thumbnail {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.project-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-category {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: var(--color-accent);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.85rem;
}

.project-content {
    padding: var(--spacing-md);
}

.project-content h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.project-content p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.btn-view {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-bg);
    color: white;
    text-decoration: none;
    border-radius: 4px;
    transition: background 0.3s;
}

.btn-view:hover {
    background: #2980b9;
}

/* === Photo Gallery === */
.photo-sidebar {
    background: var(--color-bg-alt);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-bottom: var(--spacing-md);
    position: relative;
}

/* Mobile Menu Toggle Button */
.menu-toggle {
    display: none; /* Standardmäßig versteckt (Desktop) */
    width: 100%;
    background: var(--color-primary);
    color: white;
    border: none;
    padding: var(--spacing-sm);
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    text-align: left;
    transition: background 0.3s;
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.menu-toggle:hover {
    background: var(--color-secondary);
}

.menu-toggle-label {
    font-weight: 600;
    display: inline-block;
}

.menu-current-selection {
    display: inline-block;
    margin-left: var(--spacing-xs);
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

.menu-current-selection::before {
    content: "→ ";
    margin-right: 0.25rem;
}

.menu-toggle-icon {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    transition: transform 0.3s;
    font-size: 0.8rem;
}

.photo-sidebar.menu-open .menu-toggle-icon {
    transform: translateY(-50%) rotate(180deg);
}

.photo-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.nav-category {
    border-bottom: 1px solid var(--color-border);
    padding-bottom: var(--spacing-sm);
}

.nav-category:last-child {
    border-bottom: none;
}

.nav-category-link {
    display: block;
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
    padding: var(--spacing-xs) 0;
    transition: color 0.3s;
}

.nav-category-link:hover,
.nav-category-link.active {
    color: var(--color-accent);
}

.nav-subcategories {
    list-style: none;
    margin-top: var(--spacing-xs);
    padding-left: var(--spacing-md);
}

.nav-subcategories li {
    margin: 0.25rem 0;
}

.nav-subcategories a {
    color: var(--color-text-light);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.nav-subcategories a:hover,
.nav-subcategories a.active {
    color: var(--color-accent);
}

.photo-gallery {
    margin-top: var(--spacing-md);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-sm);
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 4px;
    cursor: pointer;
    aspect-ratio: 4/3;
}

.gallery-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.gallery-item:hover .gallery-image {
    transform: scale(1.05);
}

.no-selection {
    text-align: left;
    color: var(--color-text-light);
    padding: var(--spacing-xl);
}

/* === Lightbox === */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-content {
    max-width: 90%;
    max-height: 90%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

#lightbox-image {
    max-width: 100%;
    max-height: 85vh;
    object-fit: contain;
}

.lightbox-caption {
    color: white;
    margin-top: var(--spacing-sm);
    text-align: center;
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
    position: absolute;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
    font-size: 2rem;
    padding: var(--spacing-sm);
    cursor: pointer;
    transition: background 0.3s;
    z-index: 10000;
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
    background: rgba(255, 255, 255, 0.3);
}

.lightbox-close {
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    font-size: 2.5rem;
    line-height: 1;
}

.lightbox-prev {
    left: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
}

.lightbox-next {
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
}

/* === Video Gallery === */
.video-gallery {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.video-item {
    background: var(--color-bg-alt);
    padding: var(--spacing-md);
    border-radius: 8px;
}

.video-item h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.video-item p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.video-player {
    width: 100%;
    max-width: 800px;
    border-radius: 4px;
}

/* === Blog/Sonstiges === */
.blog-entries {
    max-width: 800px;
    margin: 0 auto;
}

.blog-entry {
    background: var(--color-bg-alt);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--color-accent);
}

.entry-date {
    display: block;
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.blog-entry h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.blog-entry p {
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.entry-link {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
}

.entry-link:hover {
    text-decoration: underline;
}

/* === Footer === */
.site-footer {
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-md) 0;
    margin-top: var(--spacing-xl);
    text-align: center;
}

.footer-nav {
    margin: var(--spacing-sm) 0;
}

.footer-nav a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    margin: 0 var(--spacing-sm);
}

.footer-nav a:hover {
    color: white;
    text-decoration: underline;
}

.privacy-note {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: var(--spacing-sm);
}

/* === Utility Classes === */
.no-results,
.no-content {
    text-align: center;
    color: var(--color-text-light);
    padding: var(--spacing-xl);
    font-style: italic;
}

/* === Back to Top Button === */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--color-accent);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
    transform: translateY(100px);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-primary);
    transform: translateY(-5px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.back-to-top:active {
    transform: translateY(-2px);
}

.back-to-top:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
}

.back-to-top svg {
    width: 24px;
    height: 24px;
    pointer-events: none;
}

/* Mobile Anpassung */
@media (max-width: 768px) {
    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
    }

    .back-to-top svg {
        width: 20px;
        height: 20px;
    }
}

/* === Responsive Design === */
@media (max-width: 768px) {
    .site-header .container {
        flex-direction: column;
        align-items: flex-start;
    }

    .main-nav ul {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .hero h2 {
        font-size: 2rem;
    }

    .category-grid {
        grid-template-columns: 1fr;
    }

    .filter-bar {
        flex-direction: column;
        align-items: flex-start;
    }

    .lightbox-prev,
    .lightbox-next {
        font-size: 1.5rem;
        padding: var(--spacing-xs);
    }

    /* Mobile Photo Menu */
    .menu-toggle {
        display: block; /* Zeige Toggle-Button auf Mobile */
    }

    .photo-nav {
        /* Wird via JavaScript ein/ausgeblendet */
        flex-direction: column;
    }
}

@media (min-width: 768px) {
    .photo-sidebar {
        float: left;
        width: 250px;
        margin-right: var(--spacing-md);
    }

    .photo-gallery {
        margin-left: 270px;
    }
}

@media (min-width: 1200px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}