/* --- Design System & CSS Variables --- */
:root {
    --bg-primary: #09090b;
    --bg-secondary: #1a1a1d;
    --bg-card: #18181b;
    --bg-hover: #27272a;
    --border-color: #27272a;
    --border-hover: #3f3f46;
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #73737a;
    --accent: #ffffff;
    --sidebar-width: 300px;
    --header-height: 70px;
    --transition-speed: 0.25s;
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    font-family: var(--font-sans);
    overflow: hidden;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: -0.02em;
}

/* --- Layout Structure --- */
.app-container {
    display: flex;
    width: 100vw;
    height: 100vh;
}

/* --- Sidebar --- */
.sidebar {
    width: var(--sidebar-width);
    height: 100%;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--text-primary);
    font-size: 1.0rem;
}

.logo-dot {
    width: 8px;
    height: 8px;
    background-color: var(--accent);
    border-radius: 50%;
}

.subtitle {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.15em;
    margin-top: 4px;
}

.sidebar-nav {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.nav-group-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    margin-bottom: 12px;
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-item, .nav-subitem {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-speed) ease;
    border: 1px solid transparent;
}

.nav-item {
    color: var(--text-secondary);
}

.nav-item:hover, .nav-item.active {
    background-color: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.nav-subitem {
    color: var(--text-secondary);
    padding-left: 20px;
}

.nav-subitem:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.02);
}

.nav-subitem.active {
    background-color: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    border-color: var(--border-color);
    box-shadow: inset 3px 0 0 0 var(--accent);
}

.nav-icon {
    width: 18px;
    height: 18px;
    stroke-width: 2;
}

.nav-icon-sm {
    width: 16px;
    height: 16px;
    stroke-width: 2;
}

.sidebar-footer {
    padding: 20px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.status {
    display: flex;
    align-items: center;
    gap: 6px;
}

.status-indicator {
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.status-indicator.online {
    background-color: #10b981;
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.5);
}

/* --- Main Content Area --- */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

/* --- Topbar --- */
.topbar {
    height: var(--header-height);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    background-color: rgba(9, 9, 11, 0.8);
    backdrop-filter: blur(12px);
    z-index: 10;
}

.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 500;
}

.breadcrumb-separator {
    color: var(--text-muted);
}

.breadcrumb-item {
    color: var(--text-secondary);
}

.breadcrumb-item.active {
    color: var(--text-primary);
}

.btn-theme-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition-speed) ease;
}

.btn-theme-toggle:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
    background-color: var(--bg-secondary);
}

.icon-sm {
    width: 14px;
    height: 14px;
}

/* --- Content Body --- */
.content-body {
    flex: 1;
    overflow-y: auto;
    padding: 40px;
}

.grid-layout {
    display: grid;
    grid-template-columns: 1fr 420px;
    gap: 40px;
    align-items: start;
    max-width: 1440px;
    margin: 0 auto;
}

/* --- Doc Panel & Markdown --- */
.doc-panel {
    min-width: 0; /* Prevents flex items from overflowing */
}

.doc-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px;
}

.doc-header {
    margin-bottom: 32px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 24px;
}

.badge {
    align-self: flex-start;
    background-color: var(--bg-hover);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-family: var(--font-mono);
}

.doc-header h1 {
    font-size: 2.2rem;
    line-height: 1.2;
}

/* --- Markdown Elements Rendering --- */
.markdown-body {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

.markdown-body h1, 
.markdown-body h2, 
.markdown-body h3 {
    margin-top: 32px;
    margin-bottom: 16px;
    line-height: 1.3;
}

.markdown-body h2 {
    font-size: 1.4rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.markdown-body h3 {
    font-size: 1.15rem;
}

.markdown-body p {
    margin-bottom: 20px;
}

.markdown-body hr {
    border: 0;
    border-top: 1px solid var(--border-color);
    margin: 32px 0;
}

.markdown-body ul, 
.markdown-body ol {
    margin-bottom: 20px;
    padding-left: 24px;
}

.markdown-body li {
    margin-bottom: 8px;
}

.markdown-body li > ul,
.markdown-body li > ol {
    margin-top: 8px;
    margin-bottom: 0;
}

.markdown-body blockquote {
    background-color: rgba(255, 255, 255, 0.01);
    border-left: 3px solid var(--accent);
    padding: 16px 20px;
    margin: 24px 0;
    border-radius: 0 8px 8px 0;
}

.markdown-body blockquote p {
    margin-bottom: 0;
    font-style: italic;
    color: var(--text-primary);
}

.markdown-body strong {
    color: var(--text-primary);
}

/* Tables inside Markdown */
.markdown-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 0.9rem;
}

.markdown-body th, 
.markdown-body td {
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    text-align: left;
}

.markdown-body th {
    background-color: var(--bg-hover);
    color: var(--text-primary);
    font-weight: 600;
}

.markdown-body tr:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.01);
}

/* Links in Markdown */
.markdown-body a {
    color: var(--text-primary);
    text-decoration: underline;
    text-underline-offset: 4px;
    transition: color var(--transition-speed) ease;
}

.markdown-body a:hover {
    color: var(--text-secondary);
}

/* --- Mermaid Diagram container --- */
.mermaid {
    background-color: var(--bg-secondary) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 12px !important;
    padding: 30px !important;
    margin: 32px 0 !important;
    display: flex;
    justify-content: center;
    overflow-x: auto;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.2);
}

.mermaid svg {
    max-width: 100% !important;
    height: auto !important;
    font-family: var(--font-sans) !important;
}

/* Custom design overrides inside SVG */
.mermaid .node rect, 
.mermaid .node circle, 
.mermaid .node polygon,
.mermaid .node path {
    fill: #dddddd !important; /* Hellgrau für umrahmte Elemente */
    stroke: #ffffff !important; /* Weißer Kontur-Rahmen */
    stroke-width: 1.5px !important;
    rx: 8px !important;
    ry: 8px !important;
    transition: all var(--transition-speed) ease;
}

.mermaid .node:hover rect, 
.mermaid .node:hover circle, 
.mermaid .node:hover polygon,
.mermaid .node:hover path {
    fill: #ffffff !important; /* Strahlendes Weiß bei Hover */
    stroke: #dddddd !important;
}

.mermaid .edgePath .path {
    stroke: var(--text-muted) !important;
    stroke-width: 1.5px !important;
}

.mermaid .edgePath .path:hover {
    stroke: var(--text-secondary) !important;
}

.mermaid .marker {
    fill: var(--text-muted) !important;
    stroke: none !important;
}

.mermaid .label {
    font-family: var(--font-sans) !important;
    font-weight: 600 !important;
}

/* Dunkle Schrift für Text INNERHALB der hellen Knoten */
.mermaid .node .label,
.mermaid .node text,
.mermaid .node span {
    color: #09090b !important;
    fill: #09090b !important;
}

.mermaid .edgeLabel rect {
    fill: var(--bg-primary) !important;
    stroke: var(--border-color) !important;
    rx: 4px !important;
    ry: 4px !important;
}

.mermaid .edgeLabel {
    color: var(--text-secondary) !important;
}

/* --- Visuals Panel --- */
.visuals-panel {
    position: sticky;
    top: 40px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.panel-header {
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
}

.panel-header h2 {
    font-size: 1rem;
    font-family: var(--font-mono);
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* Main Screenshot box */
.main-screenshot-container {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    cursor: zoom-in;
}

.main-screenshot-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.main-screenshot-container:hover .main-screenshot-img {
    transform: scale(1.03);
}

.screenshot-overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(9, 9, 11, 0.4);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 8px;
    opacity: 0;
    transition: opacity var(--transition-speed) ease;
    backdrop-filter: blur(2px);
}

.main-screenshot-container:hover .screenshot-overlay {
    opacity: 1;
}

.zoom-icon {
    width: 24px;
    height: 24px;
    color: var(--text-primary);
}

.screenshot-overlay span {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: 0.05em;
}

/* Thumbnails */
.thumbnails-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.thumbnail-card {
    aspect-ratio: 16 / 10;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

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

.thumbnail-card:hover {
    border-color: var(--border-hover);
}

.thumbnail-card.active {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent);
}

/* --- Lightbox Modal --- */
.lightbox {
    position: fixed;
    inset: 0;
    background-color: rgba(9, 9, 11, 0.95);
    backdrop-filter: blur(8px);
    z-index: 999;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-speed) ease;
}

.lightbox.active {
    opacity: 1;
    pointer-events: auto;
}

.lightbox-content {
    max-width: 85%;
    max-height: 80%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    transform: scale(0.95);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.lightbox.active .lightbox-content {
    transform: scale(1);
}

.lightbox-content img {
    max-width: 100%;
    max-height: 75vh;
    object-fit: contain;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 24px 48px -12px rgba(0, 0, 0, 0.5);
}

.lightbox-caption {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    padding: 6px 16px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.lightbox-close {
    position: absolute;
    top: 30px;
    right: 40px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    transition: color var(--transition-speed) ease;
}

.lightbox-close:hover {
    color: var(--text-primary);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(24, 24, 27, 0.5);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

.lightbox-nav:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.lightbox-nav.prev {
    left: 40px;
}

.lightbox-nav.next {
    right: 40px;
}

/* --- Loader Spinner --- */
.loading-spinner {
    width: 32px;
    height: 32px;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--accent);
    border-radius: 50%;
    margin: 40px auto;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* --- Responsive Adjustments --- */
@media (max-width: 1024px) {
    .grid-layout {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .visuals-panel {
        position: static;
    }
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .sidebar-nav {
        padding: 16px 24px;
        flex-direction: row;
        gap: 16px;
        overflow-x: auto;
    }
    
    .nav-group {
        display: flex;
        align-items: center;
        gap: 12px;
    }
    
    .nav-group-title {
        margin-bottom: 0;
    }
    
    .nav-list {
        flex-direction: row;
        gap: 4px;
    }
    
    .nav-subitem {
        padding-left: 14px;
    }
    
    .sidebar-footer {
        display: none;
    }
    
    .topbar {
        padding: 0 24px;
    }
    
    .content-body {
        padding: 24px;
    }
    
    .doc-card {
        padding: 24px;
    }
    
    .lightbox-nav.prev {
        left: 10px;
    }
    .lightbox-nav.next {
        right: 10px;
    }
}