/* 
 * Layout-System für Header + Sidebar Design
 * CityChallenge Forms - Modulares Layout
 */

:root {
    --header-height: 60px;
    --sidebar-width: 220px;
    --sidebar-collapsed-width: 60px;
    --layout-z-header: 1030;
    --layout-z-sidebar: 1020;
    --layout-z-overlay: 1025;
    --sidebar-bg: #f8f9fa;
    --header-bg: #ffffff;
    --layout-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    --transition-speed: 0.3s;
}

/* Layout Container */
.app-layout {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: #f8f9fa;
}

/* Header Layout */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--header-bg);
    border-bottom: 1px solid #e5e7eb;
    box-shadow: var(--layout-shadow);
    z-index: var(--layout-z-header);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    transition: all var(--transition-speed) ease;
}

/* Sidebar Layout */
.app-sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--header-height));
    background: var(--sidebar-bg);
    border-right: 1px solid #e5e7eb;
    box-shadow: var(--layout-shadow);
    z-index: var(--layout-z-sidebar);
    overflow-y: auto;
    overflow-x: hidden;
    transition: all var(--transition-speed) ease;
    transform: translateX(0);
}

/* Main Content Area */
.app-main {
    margin-top: var(--header-height);
    margin-left: var(--sidebar-width);
    min-height: calc(100vh - var(--header-height));
    padding: 1.5rem;
    transition: margin-left var(--transition-speed) ease;
    background: #f8f9fa;
}

/* Sidebar States */
.app-layout.sidebar-collapsed .app-sidebar {
    width: var(--sidebar-collapsed-width);
}

.app-layout.sidebar-collapsed .app-main {
    margin-left: var(--sidebar-collapsed-width);
}

.app-layout.sidebar-hidden .app-sidebar {
    transform: translateX(-100%);
}

.app-layout.sidebar-hidden .app-main {
    margin-left: 0;
}

/* Mobile Overlay */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--layout-z-overlay);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-speed) ease;
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Responsive Breakpoints */

/* Desktop Large (1200px+) */
@media (min-width: 1200px) {
    .app-sidebar {
        width: var(--sidebar-width);
    }
    
    .app-main {
        margin-left: var(--sidebar-width);
        padding: 2rem;
    }
}

/* Desktop Medium (992px - 1199px) */
@media (max-width: 1199px) and (min-width: 992px) {
    .app-layout {
        /* Default kollabierte Sidebar für mittlere Bildschirme */
    }
    
    .app-layout:not(.sidebar-expanded) .app-sidebar {
        width: var(--sidebar-collapsed-width);
    }
    
    .app-layout:not(.sidebar-expanded) .app-main {
        margin-left: var(--sidebar-collapsed-width);
    }
}

/* Tablet (768px - 991px) */
@media (max-width: 991px) and (min-width: 768px) {
    .app-sidebar {
        transform: translateX(-100%);
        width: var(--sidebar-width);
    }
    
    .app-main {
        margin-left: 0;
        padding: 1.5rem;
    }
    
    .app-layout.sidebar-open .app-sidebar {
        transform: translateX(0);
    }
    
    .sidebar-overlay {
        display: block;
    }
    
    .app-layout.sidebar-open .sidebar-overlay {
        opacity: 1;
        visibility: visible;
    }
}

/* Mobile (< 768px) */
@media (max-width: 767px) {
    .app-header {
        padding: 0 0.75rem;
    }
    
    .app-sidebar {
        transform: translateX(-100%);
        width: 280px; /* Breitere Sidebar auf Mobile */
        max-width: 85vw;
    }
    
    .app-main {
        margin-left: 0;
        padding: 1rem;
    }
    
    .app-layout.sidebar-open .app-sidebar {
        transform: translateX(0);
    }
    
    .sidebar-overlay {
        display: block;
    }
    
    .app-layout.sidebar-open .sidebar-overlay {
        opacity: 1;
        visibility: visible;
    }
}

/* Content Container */
.app-content {
    background: #ffffff;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    margin-bottom: 1.5rem;
}

/* Scrollbar Styling für Sidebar */
.app-sidebar::-webkit-scrollbar {
    width: 6px;
}

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

.app-sidebar::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 3px;
}

.app-sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.2);
}

/* Animation für Content Loading */
.app-main > * {
    animation: fadeInContent 0.3s ease-out;
}

@keyframes fadeInContent {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Print Styles */
@media print {
    .app-header,
    .app-sidebar,
    .sidebar-overlay {
        display: none !important;
    }
    
    .app-main {
        margin: 0 !important;
        padding: 0 !important;
    }
    
    .app-content {
        box-shadow: none !important;
        border: 1px solid #dee2e6 !important;
    }
}

/* Accessibility */
.app-layout:focus-within .app-sidebar {
    /* Sidebar bleibt sichtbar wenn fokussiert */
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .app-sidebar,
    .app-main,
    .sidebar-overlay,
    .app-main > * {
        transition: none !important;
        animation: none !important;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .app-header {
        border-bottom: 2px solid #000000;
    }
    
    .app-sidebar {
        border-right: 2px solid #000000;
    }
}