/* VermieterBox Main Styles */
:root {
    /* Color Palette - German Business Theme */
    --primary-color: #1e56a0;
    --primary-light: #2d6db5;
    --primary-dark: #163d73;
    --secondary-color: #f6f8fa;
    --accent-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;
    --background: #ffffff;
    --background-secondary: #f8f9fa;
    --border-color: #dee2e6;
    --border-light: #e9ecef;
    --shadow: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-medium: 0 4px 12px rgba(0,0,0,0.12);
    --shadow-large: 0 8px 32px rgba(0,0,0,0.16);
    
    /* Typography */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, 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: 1.875rem;
    
    /* 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: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

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

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.header {
    background: var(--background);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

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

.logo h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-color);
    margin: 0;
}

.logo .version {
    background: var(--primary-color);
    color: white;
    font-size: var(--font-size-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* Status Indicator */
.status-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all 0.3s ease;
}

.status-indicator.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.status-indicator.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.status-indicator.loading {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.loading-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Login Styles */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    padding: var(--spacing-xl);
}

.login-card {
    background: var(--background);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-large);
    padding: var(--spacing-2xl);
    width: 100%;
    max-width: 420px;
    animation: slideUp 0.6s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.login-header h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.login-header .subtitle {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.login-footer {
    text-align: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-light);
}

.login-footer p {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

/* Form Styles */
.form-group {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.form-group input {
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: all 0.3s ease;
    background: var(--background);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 86, 160, 0.1);
}

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

.password-toggle {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    user-select: none;
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    transition: color 0.2s ease;
}

.password-toggle:hover {
    color: var(--text-secondary);
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    user-select: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

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

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

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline:hover:not(:disabled) {
    background: var(--primary-color);
    color: white;
}

.btn-full {
    width: 100%;
}

/* Dashboard Styles */
.dashboard {
    background: var(--background);
    min-height: calc(100vh - 80px);
    overflow: hidden;
    /* Schlagschatten für die ganze Seite wie im Screenshot */
    box-shadow: 
        -4px 0 16px rgba(0, 0, 0, 0.06),    /* Links - sanfter Schatten */
        0 4px 16px rgba(0, 0, 0, 0.12),     /* Unten - Hauptschatten */
        4px 0 16px rgba(0, 0, 0, 0.06),     /* Rechts - sanfter Schatten */
        0 -2px 8px rgba(0, 0, 0, 0.04);     /* Oben - sehr sanft */
    /* Graue Haarlinie links */
    border-left: 1px solid #e2e8f0;
    /* Alle Ecken rund */
    border-radius: 12px;
    /* Max-width für bessere Zentrierung */
    max-width: 1200px;
    margin: 20px auto;
}

/* Navigation Tabs */
.nav-tabs {
    display: flex;
    background: var(--background-secondary);
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
}

.nav-tab {
    background: none;
    border: none;
    padding: var(--spacing-lg) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
    white-space: nowrap;
}

.nav-tab:hover {
    color: var(--primary-color);
    background: rgba(30, 86, 160, 0.05);
}

.nav-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background: var(--background);
}

/* Content Sections */
.content-section {
    padding: 24px 48px;
}

.content-section h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    max-width: 1200px;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

@media (min-width: 900px) {
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.stat-card {
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.stat-card.highlight {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(30, 86, 160, 0.02) 0%, rgba(30, 86, 160, 0.06) 100%);
}

.stat-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-sm);
}

.stat-content h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.stat-content p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-md);
}

/* Quick Actions */
.quick-actions {
    background: var(--background-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.quick-actions h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

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

.action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background: var(--background);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    color: var(--text-primary);
}

.action-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.action-icon {
    font-size: var(--font-size-2xl);
}

/* Loading State */
.loading {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .login-card {
        padding: var(--spacing-xl);
        margin: var(--spacing-md);
    }
    
    .content-section {
        padding: var(--spacing-lg);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .nav-tabs {
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
    }
    
    .action-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .action-buttons {
        grid-template-columns: 1fr;
    }
    
    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}

/* Loading Screen Styles */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1010;
    display: none;
    justify-content: center;
    align-items: center;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(5px);
}

.loading-overlay {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    background: var(--background);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-large);
    text-align: center;
    min-width: 300px;
    border: 1px solid var(--border-light);
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-light);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-content h2 {
    color: var(--text-primary);
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin: 0;
}

.loading-content p {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    margin: 0;
    max-width: 280px;
    line-height: 1.5;
}

.loading-progress {
    width: 100%;
    max-width: 250px;
}

.loading-bar {
    width: 100%;
    height: 4px;
    background: var(--border-light);
    border-radius: 2px;
    overflow: hidden;
}

.loading-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    width: 0%;
    transition: width 2s ease-in-out;
    border-radius: 2px;
}
/* Header Controls */
.header-controls {
    display: flex;
    gap: 20px;
    align-items: center;
}

.header-controls .control-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-controls label {
    font-weight: 500;
    color: #6c757d;
    margin: 0;
}

.header-controls select {
    padding: 5px 10px;
    border: 1px solid #dee2e6;
    border-radius: 4px;
    background: white;
    min-width: 150px;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}