/* NSL Berlin Portal - Hauptstylesheet
 * Modern Dark Theme mit Security-Ästhetik
 */

/* ==========================================
   CSS Variables / Design Tokens
   ========================================== */
:root {
    /* Farbpalette - Dunkles Security Theme */
    --color-bg-primary: #0a0e14;
    --color-bg-secondary: #111820;
    --color-bg-tertiary: #1a222d;
    --color-bg-elevated: #232d3b;
    --color-bg-hover: #2d3a4d;
    
    /* Akzentfarben */
    --color-accent-primary: #00d4aa;
    --color-accent-primary-dim: rgba(0, 212, 170, 0.15);
    --color-accent-secondary: #3b82f6;
    --color-accent-warning: #f59e0b;
    --color-accent-danger: #ef4444;
    --color-accent-success: #10b981;
    
    /* Textfarben */
    --color-text-primary: #f0f4f8;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    --color-text-inverse: #0a0e14;
    
    /* Borders */
    --color-border: rgba(148, 163, 184, 0.1);
    --color-border-active: rgba(0, 212, 170, 0.5);
    
    /* Schatten */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(0, 212, 170, 0.2);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Typography */
    --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    
    /* Layout */
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 70px;
    --header-height: 70px;
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--color-accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-text-primary);
}

img {
    max-width: 100%;
    height: auto;
}

/* ==========================================
   App Layout
   ========================================== */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* ==========================================
   Sidebar
   ========================================== */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--color-bg-secondary);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform var(--transition-normal), width var(--transition-normal);
}

.sidebar-header {
    height: var(--header-height);
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--color-border);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-primary);
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.logo-icon {
    font-size: 1.75rem;
}

.logo-icon-img {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
}

.nav-list {
    list-style: none;
}

.nav-item {
    margin-bottom: var(--spacing-xs);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    font-weight: 500;
}

.nav-link i {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
}

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

.nav-link.active {
    background: var(--color-accent-primary-dim);
    color: var(--color-accent-primary);
}

.nav-divider {
    height: 1px;
    background: var(--color-border);
    margin: var(--spacing-md) 0;
}

.sidebar-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.user-avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-sm);
    color: var(--color-bg-primary);
}

.user-details {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
}

.user-role {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.logout-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.logout-btn:hover {
    background: var(--color-accent-danger);
    color: white;
}

/* ==========================================
   Main Content
   ========================================== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.content-header {
    height: var(--header-height);
    padding: 0 var(--spacing-xl);
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    position: sticky;
    top: 0;
    z-index: 50;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.page-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    flex: 1;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.current-time {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-variant-numeric: tabular-nums;
}

.content-body {
    flex: 1;
    padding: var(--spacing-xl);
}

/* ==========================================
   Cards
   ========================================== */
.card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-tertiary);
}

/* ==========================================
   Stats Grid
   ========================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    transition: all var(--transition-normal);
}

.stat-card:hover {
    border-color: var(--color-border-active);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-icon.primary {
    background: var(--color-accent-primary-dim);
    color: var(--color-accent-primary);
}

.stat-icon.secondary {
    background: rgba(59, 130, 246, 0.15);
    color: var(--color-accent-secondary);
}

.stat-icon.warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--color-accent-warning);
}

.stat-icon.success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--color-accent-success);
}

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    line-height: 1.2;
}

/* ==========================================
   Tables
   ========================================== */
.table-container {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.table th {
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--color-bg-tertiary);
}

.table tr:hover td {
    background: var(--color-bg-hover);
}

/* ==========================================
   Buttons
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--color-accent-primary);
    color: var(--color-bg-primary);
}

.btn-primary:hover:not(:disabled) {
    background: #00f0c0;
    box-shadow: 0 0 20px rgba(0, 212, 170, 0.4);
}

.btn-secondary {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-bg-hover);
    border-color: var(--color-text-muted);
}

.btn-danger {
    background: var(--color-accent-danger);
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
}

/* ==========================================
   Forms
   ========================================== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 3px var(--color-accent-primary-dim);
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

.input-wrapper {
    position: relative;
}

.input-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    font-size: 1.125rem;
    pointer-events: none;
}

.input-wrapper .form-input {
    padding-left: calc(var(--spacing-md) + 1.5rem + var(--spacing-sm));
}

/* ==========================================
   Alerts
   ========================================== */
.alert {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.alert i {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.alert-success {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--color-accent-success);
}

.alert-error {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--color-accent-danger);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: var(--color-accent-warning);
}

.alert-info {
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: var(--color-accent-secondary);
}

/* ==========================================
   Badges
   ========================================== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.badge-success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--color-accent-success);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--color-accent-warning);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.15);
    color: var(--color-accent-danger);
}

.badge-info {
    background: rgba(59, 130, 246, 0.15);
    color: var(--color-accent-secondary);
}

/* ==========================================
   Mobile Sidebar Overlay
   ========================================== */
.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    z-index: 90;
    transition: all var(--transition-normal);
}

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

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 1024px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        transform: translateX(-100%);
        z-index: 100;
        transition: transform var(--transition-normal);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .mobile-menu-btn {
        display: block;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 56px;
    }
    
    body {
        /* Safe area insets für Geräte mit Notch */
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }
    
    .app-container {
        display: block;
    }
    
    .main-content {
        margin-left: 0;
        min-height: 100vh;
        padding-bottom: calc(70px + env(safe-area-inset-bottom));
    }
    
    .content-body {
        padding: var(--spacing-md);
    }
    
    .content-header {
        padding: 0 var(--spacing-md);
        position: sticky;
        top: 0;
        z-index: 50;
        background: var(--color-bg-primary);
        border-bottom: 1px solid var(--color-border);
    }
    
    .mobile-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        border-radius: var(--radius-md);
        background: var(--color-bg-tertiary);
    }
    
    .mobile-menu-btn svg {
        width: 22px;
        height: 22px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .stat-card {
        padding: var(--spacing-md);
    }
    
    .stat-value {
        font-size: var(--font-size-xl);
    }
    
    .page-title {
        font-size: var(--font-size-base);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    /* Mobile Sidebar */
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: 280px;
        z-index: 100;
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
        box-shadow: var(--shadow-lg);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .sidebar-header {
        padding-top: calc(var(--spacing-lg) + env(safe-area-inset-top));
    }
    
    .sidebar-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 36px;
        height: 36px;
    }
    
    /* Mobile Overlay */
    .sidebar-overlay {
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
    }
    
    /* Cards */
    .card {
        border-radius: var(--radius-md);
    }
    
    .card-header {
        padding: var(--spacing-md);
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .card-body {
        padding: var(--spacing-md);
    }
    
    /* Tables */
    .table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin: 0 calc(-1 * var(--spacing-md));
        padding: 0 var(--spacing-md);
    }
    
    .table {
        min-width: 600px;
        font-size: var(--font-size-sm);
    }
    
    /* Buttons */
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
    
    .btn-sm {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }
    
    /* Forms */
    .form-input,
    .form-select,
    .form-control {
        font-size: 16px; /* Verhindert Zoom auf iOS */
        padding: var(--spacing-md);
    }
    
    /* Alerts */
    .alert {
        margin: var(--spacing-md);
        border-radius: var(--radius-md);
    }
    
    /* Header Actions */
    .header-actions {
        display: none;
    }
}

/* Extra kleine Geräte */
@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .page-header {
        flex-direction: column;
        align-items: stretch !important;
        gap: var(--spacing-md);
    }
    
    .page-header .btn {
        width: 100%;
        justify-content: center;
    }
    
    .action-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .action-buttons .btn {
        width: 100%;
    }
    
    .form-row {
        grid-template-columns: 1fr !important;
    }
    
    .detail-grid {
        grid-template-columns: 1fr !important;
    }
}

/* PWA Standalone Mode */
@media (display-mode: standalone) {
    body {
        /* Mehr Platz für Status-Bar */
        padding-top: max(env(safe-area-inset-top), 20px);
    }
    
    .content-header {
        padding-top: var(--spacing-sm);
    }
    
    /* Keine Browser UI sichtbar */
    .sidebar-header {
        padding-top: calc(var(--spacing-lg) + max(env(safe-area-inset-top), 20px));
    }
}

/* ==========================================
   Animations
   ========================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.fade-in {
    animation: fadeIn var(--transition-normal) ease-out;
}

/* ==========================================
   Scrollbar
   ========================================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-bg-hover);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* ==========================================
   Empty State
   ========================================== */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-muted);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-state h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
}

/* ==========================================
   Interval Badge
   ========================================== */
.interval-badge {
    display: inline-block;
    font-size: var(--font-size-xs);
    color: var(--color-accent-primary);
    background: var(--color-accent-primary-dim);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-sm);
    margin-left: var(--spacing-xs);
}