🎨 Style: Enhanced Dark/Light Mode CSS System

- Erweiterte CSS-Variablen für optimierte Dark/Light Mode Balance
- Verbesserte Buttons mit präzisen Hover-Effekten und Schatten
- Optimierte Card-Komponenten mit Glass-Morphism Unterstützung
- Vollständige Form-Element Überarbeitung für beide Modi
- Enhanced Navigation mit Backdrop-Filter
- Datenbankaktualisierung nach UI-Verbesserungen

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

backend/static/css/dark-light-unified.css

@@ -7,6 +7,7 @@
  * 
  * Author: Till Tomczak - MYP Team
  * Zweck: Behebung aller UI Dark/Light Mode Inkonsistenzen
+ * Version: 2.0 - Enhanced for Perfect Light/Dark Balance
  */
 
 /* ===== UNIFIED CSS VARIABLES SYSTEM ===== */
@@ -21,7 +22,7 @@
     --mb-silver: #c4c4c4;
     --mb-gray: #666666;
     
-    /* === LIGHT MODE FOUNDATION === */
+    /* === LIGHT MODE FOUNDATION (Optimiert für maximale Klarheit) === */
     --bg-primary: #ffffff;
     --bg-secondary: #f8fafc;
     --bg-tertiary: #f1f5f9;
@@ -31,8 +32,11 @@
     --bg-modal: rgba(255, 255, 255, 0.98);
     --bg-input: #ffffff;
     --bg-input-focus: #ffffff;
+    --bg-sidebar: #f9fafb;
+    --bg-navbar: rgba(255, 255, 255, 0.95);
+    --bg-dropdown: #ffffff;
     
-    /* === TEXT COLORS LIGHT === */
+    /* === TEXT COLORS LIGHT (Optimiert für perfekte Lesbarkeit) === */
     --text-primary: #111827;
     --text-secondary: #374151;
     --text-tertiary: #6b7280;
@@ -42,93 +46,114 @@
     --text-success: #059669;
     --text-warning: #d97706;
     --text-error: #dc2626;
+    --text-link: var(--mb-primary);
+    --text-link-hover: var(--mb-primary-dark);
     
-    /* === BORDER COLORS LIGHT === */
+    /* === BORDER COLORS LIGHT (Subtile aber sichtbare Grenzen) === */
     --border-primary: #e5e7eb;
     --border-secondary: #d1d5db;
     --border-focus: var(--mb-primary);
     --border-error: #f87171;
     --border-success: #34d399;
+    --border-warning: #fbbf24;
+    --border-hover: #c2c7d0;
     
-    /* === SHADOWS LIGHT === */
+    /* === SHADOWS LIGHT (Sanfte, professionelle Schatten) === */
     --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
     --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
     --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
     --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
     --shadow-modal: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
+    --shadow-card: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
+    --shadow-card-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
     
-    /* === GLASSMORPHISM LIGHT === */
+    /* === GLASSMORPHISM LIGHT (Subtil und elegant) === */
     --glass-bg: rgba(255, 255, 255, 0.8);
     --glass-border: rgba(255, 255, 255, 0.2);
     --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
     --glass-blur: blur(16px);
     
-    /* === INTERACTIVE STATES LIGHT === */
+    /* === INTERACTIVE STATES LIGHT (Klare Rückmeldung) === */
     --hover-bg: rgba(0, 115, 206, 0.04);
     --active-bg: rgba(0, 115, 206, 0.08);
     --focus-ring: 0 0 0 3px rgba(0, 115, 206, 0.1);
+    --hover-card: rgba(0, 0, 0, 0.02);
+    --active-card: rgba(0, 0, 0, 0.04);
     
-    /* === GRADIENTS LIGHT === */
+    /* === GRADIENTS LIGHT (Dezente Verläufe) === */
     --gradient-primary: linear-gradient(135deg, #ffffff 0%, #fafbfc 100%);
     --gradient-card: linear-gradient(135deg, #ffffff 0%, #fcfcfd 100%);
     --gradient-modal: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
     --gradient-button: linear-gradient(135deg, var(--mb-primary) 0%, var(--mb-primary-dark) 100%);
+    --gradient-navbar: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(248, 250, 252, 0.95) 100%);
 }
 
-/* ===== DARK MODE OVERRIDES ===== */
+/* ===== DARK MODE OVERRIDES (Optimiert für Augenkomfort und Kontrast) ===== */
 .dark {
-    /* === DARK MODE FOUNDATION === */
+    /* === DARK MODE FOUNDATION (Mercedes-Schwarz mit warmen Akzenten) === */
     --bg-primary: #000000;
-    --bg-secondary: #0f0f0f;
+    --bg-secondary: #0a0a0a;
-    --bg-tertiary: #1f1f1f;
+    --bg-tertiary: #121212;
-    --bg-card: #1a1a1a;
+    --bg-card: #0f0f0f;
-    --bg-surface: #151515;
+    --bg-surface: #080808;
     --bg-overlay: rgba(0, 0, 0, 0.95);
-    --bg-modal: rgba(26, 26, 26, 0.98);
+    --bg-modal: rgba(15, 15, 15, 0.98);
-    --bg-input: #1a1a1a;
+    --bg-input: #121212;
-    --bg-input-focus: #222222;
+    --bg-input-focus: #1a1a1a;
+    --bg-sidebar: #050505;
+    --bg-navbar: rgba(0, 0, 0, 0.95);
+    --bg-dropdown: #0f0f0f;
     
-    /* === TEXT COLORS DARK === */
+    /* === TEXT COLORS DARK (Hoher Kontrast für Lesbarkeit) === */
     --text-primary: #ffffff;
-    --text-secondary: #f1f5f9;
+    --text-secondary: #f8fafc;
     --text-tertiary: #e2e8f0;
-    --text-muted: #cbd5e1;
+    --text-muted: #94a3b8;
     --text-accent: #ffffff;
     --text-on-primary: #000000;
-    --text-success: #22c55e;
+    --text-success: #10b981;
-    --text-warning: #fbbf24;
+    --text-warning: #f59e0b;
-    --text-error: #f87171;
+    --text-error: #ef4444;
+    --text-link: #ffffff;
+    --text-link-hover: #f3f4f6;
     
-    /* === BORDER COLORS DARK === */
+    /* === BORDER COLORS DARK (Subtile aber sichtbare Abgrenzungen) === */
-    --border-primary: #2d2d2d;
+    --border-primary: #1f1f1f;
-    --border-secondary: #404040;
+    --border-secondary: #2a2a2a;
     --border-focus: #ffffff;
-    --border-error: #f87171;
+    --border-error: #ef4444;
-    --border-success: #22c55e;
+    --border-success: #10b981;
+    --border-warning: #f59e0b;
+    --border-hover: #333333;
     
-    /* === SHADOWS DARK === */
+    /* === SHADOWS DARK (Tiefere Schatten für Depth) === */
-    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
+    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
-    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
+    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
-    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
+    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6);
-    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
+    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.7);
-    --shadow-modal: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
+    --shadow-modal: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
+    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.1);
+    --shadow-card-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
     
-    /* === GLASSMORPHISM DARK === */
+    /* === GLASSMORPHISM DARK (Elegante Transparenz) === */
-    --glass-bg: rgba(26, 26, 26, 0.85);
+    --glass-bg: rgba(15, 15, 15, 0.9);
-    --glass-border: rgba(255, 255, 255, 0.15);
+    --glass-border: rgba(255, 255, 255, 0.1);
-    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
+    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
     --glass-blur: blur(16px);
     
-    /* === INTERACTIVE STATES DARK === */
+    /* === INTERACTIVE STATES DARK (Klare visuelle Rückmeldung) === */
-    --hover-bg: rgba(255, 255, 255, 0.08);
+    --hover-bg: rgba(255, 255, 255, 0.05);
-    --active-bg: rgba(255, 255, 255, 0.12);
+    --active-bg: rgba(255, 255, 255, 0.1);
     --focus-ring: 0 0 0 3px rgba(255, 255, 255, 0.2);
+    --hover-card: rgba(255, 255, 255, 0.03);
+    --active-card: rgba(255, 255, 255, 0.06);
     
-    /* === GRADIENTS DARK === */
+    /* === GRADIENTS DARK (Subtile Verläufe in Schwarz) === */
-    --gradient-primary: linear-gradient(135deg, #000000 0%, #0f0f0f 100%);
+    --gradient-primary: linear-gradient(135deg, #000000 0%, #0a0a0a 100%);
-    --gradient-card: linear-gradient(135deg, #1a1a1a 0%, #151515 100%);
+    --gradient-card: linear-gradient(135deg, #0f0f0f 0%, #0a0a0a 100%);
-    --gradient-modal: linear-gradient(135deg, #1f1f1f 0%, #1a1a1a 100%);
+    --gradient-modal: linear-gradient(135deg, #121212 0%, #0f0f0f 100%);
     --gradient-button: linear-gradient(135deg, #ffffff 0%, #f5f5f5 100%);
+    --gradient-navbar: linear-gradient(135deg, rgba(0, 0, 0, 0.95) 0%, rgba(10, 10, 10, 0.95) 100%);
 }
 
 /* ===== UNIFIED COMPONENT STYLES ===== */
@@ -155,26 +180,28 @@
 .spacing-sm { margin: 0.5rem; padding: 0.5rem; }
 .spacing-md { margin: 1rem; padding: 1rem; }
 
-/* === BUTTONS === */
+/* === BUTTONS (Optimiert für beide Modi) === */
 .btn, button {
     @apply inline-flex items-center justify-center text-sm font-medium;
     background: var(--bg-card);
     color: var(--text-primary);
-    border: 2px solid var(--border-primary);
+    border: 1px solid var(--border-primary);
-    box-shadow: var(--shadow-sm);
+    box-shadow: var(--shadow-card);
-    transition: all 0.15s ease;
+    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
-    padding: 0.875rem 1.5rem;
+    padding: 0.75rem 1.5rem;
-    border-radius: 14px;
+    border-radius: 12px;
-    margin: 0.375rem;
+    margin: 0.25rem;
     cursor: pointer;
-    font-weight: 600;
+    font-weight: 500;
+    position: relative;
+    overflow: hidden;
 }
 
 .btn:hover, button:hover {
-    background: var(--hover-bg);
+    background: var(--hover-card);
-    box-shadow: var(--shadow-md);
+    box-shadow: var(--shadow-card-hover);
     transform: translateY(-1px);
-    border-color: var(--border-secondary);
+    border-color: var(--border-hover);
 }
 
 .btn:focus {
@@ -182,60 +209,208 @@
     box-shadow: var(--focus-ring);
 }
 
+.btn:active {
+    transform: translateY(0);
+    background: var(--active-card);
+}
+
+/* Primary Button - Mercedes Brand */
 .btn-primary {
     background: var(--gradient-button);
     color: var(--text-on-primary);
-    border: 2px solid transparent;
+    border: 1px solid transparent;
-    box-shadow: 0 4px 12px rgba(0, 115, 206, 0.3);
+    box-shadow: 0 4px 12px rgba(0, 115, 206, 0.25);
+    font-weight: 600;
 }
 
 .btn-primary:hover {
     background: var(--mb-primary-dark);
     transform: translateY(-2px);
-    box-shadow: 0 6px 20px rgba(0, 115, 206, 0.4);
+    box-shadow: 0 6px 20px rgba(0, 115, 206, 0.35);
+}
+
+.btn-primary:focus {
+    box-shadow: var(--focus-ring), 0 4px 12px rgba(0, 115, 206, 0.25);
+}
+
+/* Dark Mode Button Adaptations */
+.dark .btn {
+    border-color: var(--border-primary);
+    box-shadow: var(--shadow-card);
+}
+
+.dark .btn:hover {
+    box-shadow: var(--shadow-card-hover);
+    border-color: var(--border-hover);
 }
 
 .dark .btn-primary {
     background: var(--gradient-button);
     color: var(--text-on-primary);
+    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.1);
 }
 
 .dark .btn-primary:hover {
-    background: #f0f0f0;
+    background: #f3f4f6;
+    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.15);
 }
 
-/* === CARDS === */
+/* Secondary Button */
-.card {
+.btn-secondary {
+    background: transparent;
+    color: var(--text-secondary);
+    border: 1px solid var(--border-secondary);
+}
+
+.btn-secondary:hover {
+    background: var(--hover-bg);
+    color: var(--text-primary);
+    border-color: var(--border-primary);
+}
+
+/* Danger Button */
+.btn-danger {
+    background: var(--text-error);
+    color: white;
+    border: 1px solid var(--border-error);
+}
+
+.btn-danger:hover {
+    background: #dc2626;
+    transform: translateY(-1px);
+    box-shadow: 0 4px 12px rgba(220, 38, 38, 0.3);
+}
+
+/* Success Button */
+.btn-success {
+    background: var(--text-success);
+    color: white;
+    border: 1px solid var(--border-success);
+}
+
+.btn-success:hover {
+    background: #047857;
+    transform: translateY(-1px);
+    box-shadow: 0 4px 12px rgba(5, 150, 105, 0.3);
+}
+
+/* === CARDS (Perfekte Darstellung in beiden Modi) === */
+.card, .dashboard-card {
     background: var(--gradient-card);
     border: 1px solid var(--border-primary);
-    box-shadow: var(--shadow-lg);
+    box-shadow: var(--shadow-card);
-    backdrop-filter: var(--glass-blur);
+    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
-    transition: all 0.2s ease;
+    padding: 1.5rem;
-    padding: 2rem;
+    margin: 0.75rem;
-    margin: 1rem;
+    border-radius: 16px;
-    border-radius: 24px;
+    position: relative;
+    overflow: hidden;
 }
 
-.card:hover {
+.card:hover, .dashboard-card:hover {
-    box-shadow: var(--shadow-xl);
+    box-shadow: var(--shadow-card-hover);
     transform: translateY(-2px);
-    border-color: var(--border-secondary);
+    border-color: var(--border-hover);
 }
 
+.card:focus-within {
+    border-color: var(--border-focus);
+    box-shadow: var(--focus-ring);
+}
+
+/* Glass Cards für spezielle Anwendungen */
 .glass-card {
     background: var(--glass-bg);
     border: 1px solid var(--glass-border);
     box-shadow: var(--glass-shadow);
     backdrop-filter: var(--glass-blur);
-    padding: 2rem;
+    -webkit-backdrop-filter: var(--glass-blur);
-    margin: 1rem;
+    padding: 1.5rem;
-    border-radius: 24px;
+    margin: 0.75rem;
-    transition: all 0.2s ease;
+    border-radius: 20px;
+    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
 }
 
 .glass-card:hover {
-    transform: translateY(-1px);
+    transform: translateY(-2px);
     box-shadow: var(--shadow-xl);
+    border-color: var(--glass-border);
+}
+
+/* Dark Mode Spezifische Card-Styles */
+.dark .card, .dark .dashboard-card {
+    background: var(--gradient-card);
+    border-color: var(--border-primary);
+    box-shadow: var(--shadow-card);
+}
+
+.dark .card:hover, .dark .dashboard-card:hover {
+    box-shadow: var(--shadow-card-hover);
+    border-color: var(--border-hover);
+}
+
+.dark .glass-card {
+    background: var(--glass-bg);
+    border-color: var(--glass-border);
+    box-shadow: var(--glass-shadow);
+}
+
+/* Spezielle Card-Varianten */
+.card-compact {
+    padding: 1rem;
+    border-radius: 12px;
+}
+
+.card-large {
+    padding: 2.5rem;
+    border-radius: 20px;
+}
+
+.card-bordered {
+    border-width: 2px;
+}
+
+.card-elevated {
+    box-shadow: var(--shadow-xl);
+}
+
+.card-flat {
+    box-shadow: none;
+    border: 1px solid var(--border-secondary);
+}
+
+/* Card Headers und Content */
+.card-header {
+    border-bottom: 1px solid var(--border-primary);
+    padding-bottom: 1rem;
+    margin-bottom: 1rem;
+}
+
+.card-title {
+    color: var(--text-primary);
+    font-size: 1.25rem;
+    font-weight: 600;
+    margin: 0;
+}
+
+.card-subtitle {
+    color: var(--text-secondary);
+    font-size: 0.875rem;
+    margin: 0.25rem 0 0 0;
+}
+
+.card-content {
+    color: var(--text-secondary);
+    line-height: 1.6;
+}
+
+.card-footer {
+    border-top: 1px solid var(--border-primary);
+    padding-top: 1rem;
+    margin-top: 1rem;
+    display: flex;
+    justify-content: flex-end;
+    gap: 0.5rem;
 }
 
 /* === MODALS === */
@@ -371,66 +546,279 @@
     cursor: default;
 }
 
-/* === FORM ELEMENTS === */
+/* === FORM ELEMENTS (Optimiert für beide Modi) === */
-.form-input, input, textarea, select {
+.form-input, input:not([type="checkbox"]):not([type="radio"]), textarea, select {
     @apply w-full;
     background: var(--bg-input);
-    border: 2px solid var(--border-primary);
+    border: 1px solid var(--border-primary);
     color: var(--text-primary);
-    padding: 1rem 1.25rem;
+    padding: 0.875rem 1rem;
-    border-radius: 16px;
+    border-radius: 12px;
-    margin: 0.5rem 0;
+    margin: 0.375rem 0;
-    transition: all 0.15s ease;
+    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
-    font-size: 0.95rem;
+    font-size: 0.9rem;
-    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
+    box-shadow: var(--shadow-sm);
+    font-family: inherit;
 }
 
-.form-input:focus, input:focus, textarea:focus, select:focus {
+.form-input:hover, input:not([type="checkbox"]):not([type="radio"]):hover, textarea:hover, select:hover {
+    border-color: var(--border-hover);
+    box-shadow: var(--shadow-md);
+}
+
+.form-input:focus, input:not([type="checkbox"]):not([type="radio"]):focus, textarea:focus, select:focus {
     outline: none;
     border-color: var(--border-focus);
     background: var(--bg-input-focus);
-    box-shadow: var(--focus-ring), 0 4px 12px rgba(0, 0, 0, 0.1);
+    box-shadow: var(--focus-ring);
     transform: translateY(-1px);
 }
 
 .form-input::placeholder, input::placeholder, textarea::placeholder {
     color: var(--text-muted);
-    font-style: italic;
+    opacity: 0.7;
 }
 
-/* Dark Mode Input Spezifika */
+/* Dark Mode Input Optimierungen */
-.dark .form-input, .dark input, .dark textarea, .dark select {
+.dark .form-input, .dark input:not([type="checkbox"]):not([type="radio"]), .dark textarea, .dark select {
-    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
+    background: var(--bg-input);
     border-color: var(--border-primary);
+    color: var(--text-primary);
+    box-shadow: var(--shadow-sm);
 }
 
-.dark .form-input:focus, .dark input:focus, .dark textarea:focus, .dark select:focus {
+.dark .form-input:hover, .dark input:not([type="checkbox"]):not([type="radio"]):hover, .dark textarea:hover, .dark select:hover {
-    box-shadow: var(--focus-ring), 0 4px 16px rgba(0, 0, 0, 0.4);
+    border-color: var(--border-hover);
+    box-shadow: var(--shadow-md);
+}
+
+.dark .form-input:focus, .dark input:not([type="checkbox"]):not([type="radio"]):focus, .dark textarea:focus, .dark select:focus {
     border-color: var(--border-focus);
+    background: var(--bg-input-focus);
+    box-shadow: var(--focus-ring);
 }
 
+.dark .form-input::placeholder, .dark input::placeholder, .dark textarea::placeholder {
+    color: var(--text-muted);
+    opacity: 0.8;
+}
+
+/* Form Labels */
 .form-label, label {
-    @apply block text-sm font-semibold;
+    @apply block text-sm font-medium;
     color: var(--text-secondary);
-    margin-bottom: 0.75rem;
+    margin-bottom: 0.5rem;
-    margin-top: 1.25rem;
+    margin-top: 1rem;
+    line-height: 1.4;
+}
+
+.form-label.required::after, label.required::after {
+    content: "*";
+    color: var(--text-error);
+    margin-left: 0.25rem;
+}
+
+/* Form Groups */
+.form-group {
+    margin-bottom: 1.5rem;
+}
+
+.form-group:last-child {
+    margin-bottom: 0;
+}
+
+/* Form Errors */
+.form-error {
+    color: var(--text-error);
+    font-size: 0.875rem;
+    margin-top: 0.25rem;
+    display: block;
+}
+
+.form-input.error, input.error, textarea.error, select.error {
+    border-color: var(--border-error);
+    background: rgba(239, 68, 68, 0.05);
+}
+
+.dark .form-input.error, .dark input.error, .dark textarea.error, .dark select.error {
+    border-color: var(--border-error);
+    background: rgba(239, 68, 68, 0.1);
+}
+
+/* Form Success */
+.form-input.success, input.success, textarea.success, select.success {
+    border-color: var(--border-success);
+    background: rgba(16, 185, 129, 0.05);
+}
+
+.dark .form-input.success, .dark input.success, .dark textarea.success, .dark select.success {
+    border-color: var(--border-success);
+    background: rgba(16, 185, 129, 0.1);
+}
+
+/* Checkbox und Radio Buttons */
+input[type="checkbox"], input[type="radio"] {
+    width: 1.125rem;
+    height: 1.125rem;
+    margin: 0 0.5rem 0 0;
+    accent-color: var(--mb-primary);
+    cursor: pointer;
+}
+
+.dark input[type="checkbox"], .dark input[type="radio"] {
+    accent-color: var(--text-accent);
+}
+
+/* File Inputs */
+input[type="file"] {
+    padding: 0.5rem;
+    border: 2px dashed var(--border-secondary);
+    background: var(--bg-tertiary);
+    cursor: pointer;
+}
+
+input[type="file"]:hover {
+    border-color: var(--border-primary);
+    background: var(--bg-secondary);
+}
+
+.dark input[type="file"] {
+    background: var(--bg-tertiary);
+    border-color: var(--border-secondary);
+}
+
+.dark input[type="file"]:hover {
+    border-color: var(--border-primary);
+    background: var(--bg-secondary);
+}
+
+/* Textareas */
+textarea {
+    min-height: 120px;
+    resize: vertical;
+    line-height: 1.5;
+}
+
+/* Select Dropdowns */
+select {
+    cursor: pointer;
+    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
+    background-position: right 0.5rem center;
+    background-repeat: no-repeat;
+    background-size: 1.5em 1.5em;
+    padding-right: 2.5rem;
+}
+
+.dark select {
+    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%94a3b8' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
+}
+
+/* === NAVIGATION (Optimiert für beide Modi) === */
+.navbar-sticky {
+    background: var(--gradient-navbar);
+    backdrop-filter: blur(20px);
+    -webkit-backdrop-filter: blur(20px);
+    border-bottom: 1px solid var(--border-primary);
+    box-shadow: var(--shadow-sm);
+}
+
+.dark .navbar-sticky {
+    background: var(--gradient-navbar);
+    border-bottom: 1px solid var(--border-primary);
+    box-shadow: var(--shadow-md);
 }
 
-/* === NAVIGATION === */
 .nav-item {
-    @apply px-4 py-2;
+    @apply px-3 py-2;
     color: var(--text-secondary);
-    transition: background-color 0.15s ease, color 0.15s ease;
+    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
+    border-radius: 8px;
+    font-weight: 500;
+    text-decoration: none;
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
 }
 
 .nav-item:hover {
     background: var(--hover-bg);
     color: var(--text-primary);
+    transform: translateY(-1px);
 }
 
-.nav-item.active {
+.nav-item.active, .nav-active {
     background: var(--active-bg);
     color: var(--text-accent);
+    font-weight: 600;
+    box-shadow: var(--shadow-sm);
+}
+
+.dark .nav-item {
+    color: var(--text-secondary);
+}
+
+.dark .nav-item:hover {
+    background: var(--hover-bg);
+    color: var(--text-primary);
+}
+
+.dark .nav-item.active, .dark .nav-active {
+    background: var(--active-bg);
+    color: var(--text-accent);
+}
+
+/* Mobile Navigation */
+.mobile-menu {
+    background: var(--bg-modal);
+    border-right: 1px solid var(--border-primary);
+    box-shadow: var(--shadow-xl);
+}
+
+.dark .mobile-menu {
+    background: var(--bg-modal);
+    border-right: 1px solid var(--border-primary);
+}
+
+/* User Dropdown */
+#user-dropdown, #notificationDropdown {
+    background: var(--bg-dropdown);
+    border: 1px solid var(--border-primary);
+    box-shadow: var(--shadow-xl);
+    backdrop-filter: blur(20px);
+    -webkit-backdrop-filter: blur(20px);
+}
+
+.dark #user-dropdown, .dark #notificationDropdown {
+    background: var(--bg-dropdown);
+    border: 1px solid var(--border-primary);
+    box-shadow: var(--shadow-xl);
+}
+
+/* Breadcrumbs */
+.breadcrumb {
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+    color: var(--text-tertiary);
+    font-size: 0.875rem;
+}
+
+.breadcrumb-item {
+    color: var(--text-tertiary);
+    text-decoration: none;
+}
+
+.breadcrumb-item:hover {
+    color: var(--text-secondary);
+}
+
+.breadcrumb-item.active {
+    color: var(--text-primary);
+    font-weight: 500;
+}
+
+.breadcrumb-separator {
+    color: var(--text-muted);
 }
 
 /* === ALERTS === */