:root {
    /* Light Mode - Windows 11 Style */
    --bg-page: #F3F3F3;
    --bg-window: #FFFFFF;
    --bg-sidebar: #F9F9F9;
    --bg-content: #FFFFFF;
    --text-primary: #202020;
    --text-secondary: #6B6B6B;
    --border-color: #E1E1E1;
    --shadow: rgba(0, 0, 0, 0.08);
    --shadow-hover: rgba(0, 0, 0, 0.12);
    --sidebar-hover: #F5F5F5;
    --sidebar-active: #E8F4F8;
    --accent-color: #0078D4;
    --accent-hover: #106EBE;
    --titlebar-bg: #F9F9F9;
    --titlebar-text: #202020;
    --control-hover: #E5E5E5;
    --control-close-hover: #E81123;
}

[data-theme="dark"] {
    /* Dark Mode - Windows 11 Style */
    --bg-page: #202020;
    --bg-window: #2D2D2D;
    --bg-sidebar: #252525;
    --bg-content: #2D2D2D;
    --text-primary: #FFFFFF;
    --text-secondary: #C0C0C0;
    --border-color: #3D3D3D;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-hover: rgba(0, 0, 0, 0.4);
    --sidebar-hover: #353535;
    --sidebar-active: #1E3A5F;
    --accent-color: #60CDFF;
    --accent-hover: #4FC3F7;
    --titlebar-bg: #252525;
    --titlebar-text: #FFFFFF;
    --control-hover: #3D3D3D;
    --control-close-hover: #E81123;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-page);
    color: var(--text-primary);
    min-height: 100vh;
    transition: background 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

.page-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    position: relative;
}

/* Windows 11 Window - Fluent Design */
.win11-window {
    width: 97%;
    max-width: 1500px;
    min-height: 800px;
    height: 86vh;
    background: var(--bg-window);
    border-radius: 8px;
    box-shadow: 
        0 8px 32px var(--shadow),
        0 0 0 1px var(--border-color);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
    position: relative;
    z-index: 10;
    backdrop-filter: blur(20px);
}

/* Window Title Bar - Windows 11 Style */
.window-titlebar {
    height: 32px;
    background: var(--titlebar-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 8px;
    user-select: none;
    -webkit-app-region: drag;
}

.window-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 500;
    color: var(--titlebar-text);
    -webkit-app-region: no-drag;
}

.window-title i {
    font-size: 14px;
    color: var(--accent-color);
}

.window-controls {
    display: flex;
    gap: 0;
    -webkit-app-region: no-drag;
}

.window-control {
    width: 46px;
    height: 32px;
    border: none;
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    transition: background 0.2s ease;
    font-size: 12px;
}

.window-control:hover {
    background: var(--control-hover);
}

.window-control.close:hover {
    background: var(--control-close-hover);
    color: #FFFFFF;
}

.window-control i {
    font-size: 10px;
}

.window-control.maximize i.fa-square {
    font-size: 8px;
}

/* Window Content */
.window-content {
    flex: 1;
    display: flex;
    overflow: hidden;
    background: var(--bg-content);
}

/* Sidebar - Windows 11 Explorer Style */
.win11-sidebar {
    width: 240px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-logo-mark {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFFFF;
    font-size: 18px;
    box-shadow: 0 2px 8px rgba(0, 120, 212, 0.3);
}

.sidebar-logo-text {
    display: flex;
    flex-direction: column;
}

.sidebar-logo-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.2;
}

.sidebar-logo-sub {
    font-size: 11px;
    color: var(--text-secondary);
    line-height: 1.2;
}

.sidebar-nav {
    flex: 1;
    padding: 8px;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.sidebar-nav::-webkit-scrollbar {
    width: 8px;
}

.sidebar-nav::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.sidebar-nav::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

.sidebar-section {
    margin-bottom: 16px;
}

.sidebar-item {
    padding: 8px 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 400;
    transition: all 0.2s ease;
    border-radius: 6px;
    margin-bottom: 2px;
}

.sidebar-item:hover {
    background: var(--sidebar-hover);
}

.sidebar-item.active {
    background: var(--sidebar-active);
    color: var(--accent-color);
    font-weight: 500;
}

.sidebar-item i {
    width: 20px;
    text-align: center;
    font-size: 16px;
}

/* Main Content */
.win11-content {
    flex: 1;
    overflow: hidden;
    background: var(--bg-content);
}

.win11-page {
    display: none;
    height: 100%;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 24px;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.win11-page::-webkit-scrollbar {
    width: 12px;
}

.win11-page::-webkit-scrollbar-track {
    background: transparent;
}

.win11-page::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 6px;
    border: 3px solid var(--bg-content);
}

.win11-page::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

.win11-page.active {
    display: block;
}

.content-header {
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.content-header h1 {
    font-size: 32px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.content-header p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Buttons - Windows 11 Style */
button, .btn {
    background: var(--accent-color);
    border: none;
    border-radius: 6px;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    color: #FFFFFF;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(0, 120, 212, 0.2);
}

button:hover, .btn:hover {
    background: var(--accent-hover);
    box-shadow: 0 4px 8px rgba(0, 120, 212, 0.3);
    transform: translateY(-1px);
}

button:active, .btn:active {
    transform: translateY(0);
    box-shadow: 0 1px 2px rgba(0, 120, 212, 0.2);
}

/* Content Sections */
.company-intro, .content-grid, .portfolio, .magazin, .kontakt, .studio-status, .company-meta {
    margin-bottom: 32px;
}

.company-intro h2, .portfolio h1, .magazin h1, .kontakt h1, .studio-status h1 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.company-intro p, .portfolio p, .magazin p, .kontakt p, .studio-status p {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 24px;
}

.content-item {
    background: var(--bg-sidebar);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
    text-align: center;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px var(--shadow);
}

.content-item:hover {
    box-shadow: 0 4px 12px var(--shadow-hover);
    transform: translateY(-2px);
    border-color: var(--accent-color);
}

.content-item i {
    color: var(--accent-color);
    margin-bottom: 16px;
}

.content-item h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.content-item p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.portfolio-grid, .magazin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    margin-top: 24px;
}

.portfolio-item, .magazin-item {
    background: var(--bg-sidebar);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px var(--shadow);
}

.portfolio-item:hover, .magazin-item:hover {
    box-shadow: 0 4px 12px var(--shadow-hover);
    transform: translateY(-2px);
    border-color: var(--accent-color);
}

.portfolio-item h3, .magazin-item h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.portfolio-item p, .magazin-item p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.company-meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.meta-column h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.meta-column p, .meta-column ul {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.meta-column ul {
    padding-left: 24px;
}

.meta-column li {
    margin-bottom: 8px;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent-color);
    border: none;
    border-radius: 6px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    color: #FFFFFF;
    text-decoration: none;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(0, 120, 212, 0.2);
}

.contact-link:hover {
    background: var(--accent-hover);
    box-shadow: 0 4px 8px rgba(0, 120, 212, 0.3);
    transform: translateY(-1px);
}

.contact-link:active {
    transform: translateY(0);
}

/* Footer */
.win11-footer {
    height: 40px;
    background: var(--bg-sidebar);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 16px;
    font-size: 12px;
    color: var(--text-secondary);
}

.win11-footer a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.win11-footer a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

/* Theme Tab - Windows 11 Style */
.theme-tab {
    position: absolute;
    right: 7.2rem;
    bottom: 7rem;
    transform: translateX(28px);
    display: flex;
    align-items: center;
    z-index: 1;
    transition: transform 0.3s ease;
}

.theme-tab-handle {
    width: 32px;
    height: 64px;
    border-radius: 0 8px 8px 0;
    background: var(--bg-sidebar);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-left: none;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    box-shadow: 0 4px 16px var(--shadow);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.theme-tab-handle:hover {
    background: var(--sidebar-hover);
}

.theme-tab-content {
    display: flex;
    gap: 8px;
    align-items: center;
    padding: 8px 12px;
    background: var(--bg-sidebar);
    backdrop-filter: blur(20px);
    border-radius: 8px 0 0 8px;
    margin-right: 0;
    border: 1px solid var(--border-color);
    border-right: none;
    box-shadow: 0 4px 16px var(--shadow);
}

.theme-tab:hover {
    transform: translateX(135px);
}

.theme-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    font-size: 14px;
}

.theme-btn:hover {
    background: var(--sidebar-hover);
}

.theme-btn.active {
    background: var(--accent-color);
    color: #FFFFFF;
}

/* Responsive */
@media (max-width: 768px) {
    .win11-window {
        width: 100%;
        height: 100vh;
        border-radius: 0;
    }
    
    .win11-sidebar {
        width: 200px;
    }
    
    .content-grid, .portfolio-grid, .magazin-grid {
        grid-template-columns: 1fr;
    }
}