/* ============================================
   MODERN CSS - Web-Klu Admin System
   ============================================ */

:root {
  /* Moderne Farbpalette - Professionell & Lesbar */
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --primary-light: #60a5fa;
  --primary-hover: #2563eb;
  --secondary: #64748b;
  --success: #10b981;
  --success-dark: #059669;
  --danger: #ef4444;
  --danger-dark: #dc2626;
  --warning: #f59e0b;
  --warning-dark: #d97706;
  --info: #06b6d4;
  --info-dark: #0891b2;
  
  /* Grautöne - Optimiert für Lesbarkeit */
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  
  /* Hintergrundfarben - Optimiert für Lesbarkeit */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-card: #1e293b;
  --bg-card-hover: #334155;
  --bg-input: #0f172a;
  --bg-input-focus: #1e293b;
  
  /* Textfarben - Optimiert für Kontrast */
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-tertiary: #94a3b8;
  --text-muted: #64748b;
  
  /* Layout */
  --max-width: 1400px;
  --border-radius: 0.75rem;
  --border-radius-sm: 0.5rem;
  --border-radius-lg: 1rem;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Transitions */
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
}

/* Dark Mode Support - Deaktiviert für konsistentes Design */
/* @media (prefers-color-scheme: dark) {
  :root {
    --gray-50: #0f172a;
    --gray-100: #1e293b;
    --gray-200: #334155;
    --gray-300: #475569;
    --gray-400: #64748b;
    --gray-500: #94a3b8;
    --gray-600: #cbd5e1;
    --gray-700: #e2e8f0;
    --gray-800: #f1f5f9;
    --gray-900: #f8fafc;
  }
} */

/* ============================================
   RESET & BASE STYLES
   ============================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 16px;
}

/* Verbesserte Lesbarkeit für alle Texte */
* {
  text-rendering: optimizeLegibility;
}

/* Custom Scrollbar für besseres Design */
::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--gray-600);
  border-radius: 6px;
  border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gray-500);
}

/* Firefox Scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--gray-600) var(--bg-primary);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
  line-height: 1.7;
  font-weight: 400;
}

small {
  color: var(--text-tertiary);
  font-size: 0.875rem;
  line-height: 1.5;
  font-weight: 400;
  display: block;
  margin-top: var(--spacing-xs);
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.topbar {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
  color: var(--text-primary);
  padding: 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3), 0 2px 4px rgba(0, 0, 0, 0.2);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 3px solid var(--primary);
  backdrop-filter: blur(10px);
}

.topbar-nav {
  display: flex;
  align-items: center;
  gap: 0;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--gray-700) var(--gray-900);
}

.topbar-nav::-webkit-scrollbar {
  height: 6px;
}

.topbar-nav::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

.topbar-nav::-webkit-scrollbar-thumb {
  background: var(--gray-600);
  border-radius: 3px;
}

.topbar-nav::-webkit-scrollbar-thumb:hover {
  background: var(--gray-500);
}

.topbar-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg) var(--spacing-md);
  color: var(--text-secondary);
  text-decoration: none;
  white-space: nowrap;
  transition: var(--transition);
  border-bottom: 3px solid transparent;
  font-weight: 500;
  position: relative;
}

.topbar-link:hover {
  color: var(--text-primary);
  background: rgba(59, 130, 246, 0.15);
  border-bottom-color: var(--primary-light);
}

.topbar-link.active {
  color: var(--text-primary);
  border-bottom-color: var(--primary);
  background: rgba(59, 130, 246, 0.2);
  font-weight: 600;
}

.topbar-link span:first-child {
  font-size: 1.25rem;
}

.nav-text {
  font-size: 0.9375rem;
}

.topbar-link.logout {
  margin-left: auto;
  color: #fca5a5;
}

.topbar-link.logout:hover {
  background: rgba(239, 68, 68, 0.2);
  border-bottom-color: var(--danger);
  color: var(--text-primary);
}

/* Desktop: Alle Links immer sichtbar */
@media (min-width: 769px) {
  .topbar-nav .topbar-link {
    display: flex !important;
  }
  
  .topbar-nav .nav-text {
    display: inline !important;
  }
}

/* ============================================
   MAIN CONTENT
   ============================================ */

main {
  max-width: var(--max-width);
  margin: var(--spacing-2xl) auto;
  padding: 0 var(--spacing-lg);
}

/* ============================================
   CARDS & CONTAINERS
   ============================================ */

.card {
  background: var(--bg-card);
  border-radius: var(--border-radius);
  padding: var(--spacing-xl);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4), 0 2px 4px rgba(0, 0, 0, 0.3);
  margin-bottom: var(--spacing-lg);
  transition: var(--transition);
  border: 1px solid var(--gray-700);
}

.card:hover {
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5), 0 4px 8px rgba(0, 0, 0, 0.4);
  border-color: var(--primary);
  transform: translateY(-2px);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--gray-700);
}

.card-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  letter-spacing: -0.02em;
}

/* ============================================
   FORMS
   ============================================ */

form {
  display: grid;
  gap: var(--spacing-md);
}

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

.form-row {
  display: flex;
  gap: var(--spacing-md);
  align-items: flex-end;
  width: 100%;
}

.form-row .form-group {
  position: relative;
  flex: 1;
  min-width: 0;
}

label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.9375rem;
  margin-bottom: var(--spacing-sm);
  display: block;
  letter-spacing: 0.01em;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="tel"],
input[type="date"],
select,
textarea {
  width: 100%;
  padding: 0.875rem 1.125rem;
  border: 2px solid var(--gray-600);
  border-radius: var(--border-radius-sm);
  font-size: 1rem;
  font-family: inherit;
  transition: var(--transition);
  background: var(--bg-input);
  color: var(--text-primary);
  line-height: 1.5;
  font-weight: 400;
}

/* Datumsfeld spezifisches Styling für dunkles Theme */
input[type="date"] {
  color-scheme: dark;
}

input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(1);
  cursor: pointer;
}

input::placeholder {
  color: var(--text-muted);
  opacity: 0.8;
  font-weight: 400;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary);
  border-width: 2px;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
  background: var(--bg-input-focus);
}

input:invalid:not(:placeholder-shown) {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

/* ============================================
   BUTTONS
   ============================================ */

button,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: 0.01em;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  box-shadow: 0 4px 8px rgba(59, 130, 246, 0.3);
  font-weight: 600;
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-hover) 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
  background: var(--gray-700);
  color: var(--text-primary);
  border: 1px solid var(--gray-600);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--gray-600);
  border-color: var(--gray-500);
  transform: translateY(-1px);
}

.btn-success {
  background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
  color: white;
  box-shadow: 0 4px 8px rgba(16, 185, 129, 0.3);
  font-weight: 600;
}

.btn-success:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--success-dark) 0%, var(--success) 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(16, 185, 129, 0.4);
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger) 0%, var(--danger-dark) 100%);
  color: white;
  box-shadow: 0 4px 8px rgba(239, 68, 68, 0.3);
  font-weight: 600;
}

.btn-danger:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--danger-dark) 0%, var(--danger) 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(239, 68, 68, 0.4);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-icon {
  padding: 0.5rem;
  width: 2.5rem;
  height: 2.5rem;
}

/* ============================================
   TABLES
   ============================================ */

.tabelle-container {
  overflow-x: auto;
  border-radius: var(--border-radius);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4), 0 2px 4px rgba(0, 0, 0, 0.3);
  background: var(--bg-card);
  margin-top: var(--spacing-lg);
  border: 1px solid var(--gray-700);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 800px;
}

thead {
  background: linear-gradient(135deg, var(--gray-800) 0%, var(--gray-700) 100%);
}

th {
  padding: 1rem;
  text-align: left;
  font-weight: 700;
  color: var(--text-primary);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--primary);
}

td {
  padding: 1rem;
  border-bottom: 1px solid var(--gray-700);
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.6;
  font-weight: 400;
}

tbody tr {
  transition: var(--transition);
}

tbody tr:hover {
  background: var(--bg-card-hover);
}

tbody tr:last-child td {
  border-bottom: none;
}

/* ============================================
   LOGIN
   ============================================ */

.login-container {
  max-width: 420px;
  margin: 5rem auto;
  background: var(--bg-card);
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 20px 30px rgba(0, 0, 0, 0.5), 0 10px 15px rgba(0, 0, 0, 0.4);
  border: 1px solid var(--gray-700);
}

.login-container h2 {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  color: var(--text-primary);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

/* ============================================
   POSITIONEN (Rechnungspositionen)
   ============================================ */

.position {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-input);
  border: 1px solid var(--gray-700);
  border-radius: var(--border-radius-sm);
  margin-bottom: var(--spacing-md);
  align-items: center;
  flex-wrap: wrap;
  transition: var(--transition);
}

.position:hover {
  border-color: var(--primary);
  background: var(--bg-input-focus);
}

.position input,
.position select {
  margin: 0;
  padding: 0.5rem;
  background: var(--bg-primary);
  border: 1px solid var(--gray-700);
  border-radius: var(--border-radius-sm);
  color: var(--text-primary);
  font-size: 0.875rem;
}

.position select {
  cursor: pointer;
}

.position input:focus,
.position select:focus {
  outline: none;
  border-color: var(--primary);
}

/* ============================================
   DASHBOARD
   ============================================ */

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.dashboard-card {
  background: var(--bg-card);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4), 0 2px 4px rgba(0, 0, 0, 0.3);
  transition: var(--transition);
  border: 1px solid var(--gray-700);
  display: flex;
  flex-direction: column;
  min-height: 140px;
  justify-content: space-between;
}

.dashboard-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.5), 0 4px 8px rgba(0, 0, 0, 0.4);
  border-color: var(--primary);
}

.dashboard-card-title {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  flex-shrink: 0;
}

.dashboard-card-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  flex-grow: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  word-break: break-word;
  line-height: 1.2;
  min-height: 60px;
}

.dashboard-card-change {
  font-size: 0.875rem;
  color: var(--success);
  font-weight: 500;
  text-align: center;
  padding-top: var(--spacing-sm);
  margin-top: auto;
  flex-shrink: 0;
}

/* ============================================
   DASHBOARD LAYOUT
   ============================================ */

.dashboard-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

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

/* ============================================
   CHART CONTAINER
   ============================================ */

.chart-container {
  padding: var(--spacing-md);
  min-height: 300px;
}

.chart-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.chart-bars {
  display: flex;
  align-items: flex-end;
  justify-content: space-around;
  gap: var(--spacing-sm);
  width: 100%;
  height: 250px;
  padding: var(--spacing-md);
  border-bottom: 2px solid var(--gray-700);
  margin-bottom: var(--spacing-md);
}

.chart-bar {
  flex: 1;
  background: linear-gradient(180deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: var(--border-radius-sm) var(--border-radius-sm) 0 0;
  min-height: 20px;
  position: relative;
  transition: var(--transition);
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.chart-bar:hover {
  background: linear-gradient(180deg, var(--primary-light) 0%, var(--primary) 100%);
  transform: scaleY(1.05);
}

.chart-label {
  position: absolute;
  bottom: -1.5rem;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  font-weight: 500;
  white-space: nowrap;
  transform: rotate(-45deg);
  transform-origin: top left;
  padding-left: 0.5rem;
}

.chart-note {
  color: var(--text-tertiary);
  font-size: 0.875rem;
  text-align: center;
  margin-top: var(--spacing-md);
  font-style: italic;
}

/* ============================================
   STATUS OVERVIEW
   ============================================ */

.status-overview {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
}

.status-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-input);
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--gray-700);
  transition: var(--transition);
}

.status-item:hover {
  border-color: var(--primary);
  background: var(--bg-input-focus);
}

.status-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-indicator.status-pending {
  background: var(--warning);
  box-shadow: 0 0 8px rgba(245, 158, 11, 0.5);
}

.status-indicator.status-paid {
  background: var(--success);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.5);
}

.status-indicator.status-overdue {
  background: var(--danger);
  box-shadow: 0 0 8px rgba(239, 68, 68, 0.5);
}

.status-indicator.status-draft {
  background: var(--gray-500);
  box-shadow: 0 0 8px rgba(100, 116, 139, 0.5);
}

.status-indicator.status-credit {
  background: var(--info);
  box-shadow: 0 0 8px rgba(6, 182, 212, 0.5);
}

.status-info {
  flex: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.status-label {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
}

.status-value {
  color: var(--text-primary);
  font-size: 1.125rem;
  font-weight: 700;
}

/* ============================================
   MONTHLY STATS
   ============================================ */

.monthly-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
}

.monthly-stat-item {
  padding: var(--spacing-md);
  background: var(--bg-input);
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--gray-700);
  transition: var(--transition);
}

.monthly-stat-item:hover {
  border-color: var(--primary);
  background: var(--bg-input-focus);
  transform: translateY(-2px);
}

.monthly-stat-label {
  color: var(--text-tertiary);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
}

.monthly-stat-value {
  color: var(--text-primary);
  font-size: 1.25rem;
  font-weight: 700;
}

/* ============================================
   UTILITIES
   ============================================ */

.error {
  color: #fee2e2;
  padding: var(--spacing-md);
  background: rgba(239, 68, 68, 0.15);
  border-radius: var(--border-radius-sm);
  border-left: 4px solid var(--danger);
  margin-top: var(--spacing-md);
  font-weight: 500;
  font-size: 0.9375rem;
  line-height: 1.6;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.success {
  color: #d1fae5;
  padding: var(--spacing-md);
  background: rgba(16, 185, 129, 0.15);
  border-radius: var(--border-radius-sm);
  border-left: 4px solid var(--success);
  margin-top: var(--spacing-md);
  font-weight: 500;
  font-size: 0.9375rem;
  line-height: 1.6;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.info {
  color: #cffafe;
  padding: var(--spacing-md);
  background: rgba(6, 182, 212, 0.15);
  border-radius: var(--border-radius-sm);
  border-left: 4px solid var(--info);
  margin-top: var(--spacing-md);
  font-weight: 500;
  font-size: 0.9375rem;
  line-height: 1.6;
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.loading {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--gray-300);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

.text-center {
  text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

.flex {
  display: flex;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }
.gap-3 { gap: var(--spacing-lg); }

.section-title {
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.button-group {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
  flex-wrap: wrap;
}

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

.w-full {
  width: 100%;
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */

.toast-container {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-width: 400px;
}

.toast {
  background: var(--bg-card);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5), 0 4px 10px rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  animation: slideIn 0.3s ease-out;
  border-left: 4px solid var(--primary);
  border: 1px solid var(--gray-700);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.5;
}

.toast.success {
  border-left-color: var(--success);
}

.toast.error {
  border-left-color: var(--danger);
}

.toast.warning {
  border-left-color: var(--warning);
}

.toast.info {
  border-left-color: var(--info);
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* ============================================
   MODAL
   ============================================ */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  padding: var(--spacing-lg);
  animation: fadeIn 0.2s ease-out;
  backdrop-filter: blur(4px);
}

.modal {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  max-width: 500px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6), 0 10px 20px rgba(0, 0, 0, 0.5);
  border: 1px solid var(--gray-700);
  animation: slideUp 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--gray-700);
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
  color: var(--text-primary);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-tertiary);
  padding: 0;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius-sm);
  transition: var(--transition);
}

.modal-close:hover {
  background: var(--gray-700);
  color: var(--text-primary);
}

.modal-body {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.modal-footer {
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--gray-700);
}

/* ============================================
   MOBILE NAVIGATION (HAMBURGER MENU)
   ============================================ */

.mobile-menu-toggle {
  display: none !important; /* Standardmäßig komplett versteckt */
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--spacing-md);
  margin-left: auto;
  transition: var(--transition);
  border-radius: var(--border-radius-sm);
  min-width: 48px;
  min-height: 48px;
  align-items: center;
  justify-content: center;
}

.mobile-menu-toggle:hover {
  background: rgba(59, 130, 246, 0.15);
}

.mobile-menu-toggle:active {
  transform: scale(0.95);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  body {
    font-size: 15px;
  }

  main {
    padding: 0 var(--spacing-md);
    margin: var(--spacing-md) auto;
  }

  .topbar {
    position: sticky;
    top: 0;
    z-index: 1000;
  }

  /* Hamburger-Menü nur auf Mobile anzeigen */
  .mobile-menu-toggle {
    display: flex !important;
  }

  .topbar-nav {
    padding: 0;
    gap: 0;
    flex-wrap: nowrap;
    position: relative;
  }

  /* Standard: Nur erster Link (Dashboard) und Hamburger sichtbar */
  .topbar-nav:not(.mobile-open) .topbar-link:not(:first-of-type) {
    display: none !important;
  }

  /* Wenn Menü geöffnet: Alle Links anzeigen */
  .topbar-nav.mobile-open {
    flex-direction: column;
    align-items: stretch;
    background: var(--bg-secondary);
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
    z-index: 1001;
    max-height: calc(100vh - 60px);
    overflow-y: auto;
  }

  .topbar-nav.mobile-open .topbar-link {
    display: flex !important;
    width: 100%;
    border-bottom: 1px solid var(--gray-700);
    padding: var(--spacing-md);
    justify-content: flex-start;
  }

  .topbar-nav.mobile-open .topbar-link:last-child {
    border-bottom: none;
  }

  .topbar-nav.mobile-open .nav-text {
    display: inline !important;
    margin-left: var(--spacing-sm);
  }

  .topbar-link {
    padding: var(--spacing-md) var(--spacing-sm);
    font-size: 0.9375rem;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .topbar-link:first-of-type {
    flex: 1;
  }

  .topbar-link span:first-child {
    font-size: 1.125rem;
  }

  .nav-text {
    display: none;
  }

  .topbar-link.logout {
    margin-left: 0;
  }

  .card {
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  }

  .card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
  }

  .card-title {
    font-size: 1.25rem;
    margin: 0;
    line-height: 1.3;
  }

  h1 { 
    font-size: 1.75rem; 
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
  }
  h2 { 
    font-size: 1.5rem; 
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
  }
  h3 { 
    font-size: 1.25rem; 
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
  }
  h4 { 
    font-size: 1.125rem; 
    line-height: 1.4;
    margin-bottom: var(--spacing-xs);
  }

  p {
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
  }

  /* Formulare */
  .form-row {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .form-row .form-group {
    width: 100%;
    flex: 1 1 100%;
  }

  .form-group {
    gap: var(--spacing-xs);
  }

  label {
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-xs);
  }

  input[type="text"],
  input[type="email"],
  input[type="password"],
  input[type="number"],
  input[type="tel"],
  input[type="date"],
  select,
  textarea {
    font-size: 16px; /* Verhindert Zoom auf iOS */
    padding: 0.875rem 1rem;
    min-height: 48px; /* Touch-freundliche Größe */
    -webkit-appearance: none;
    appearance: none;
  }

  /* Buttons */
  button,
  .btn {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    min-height: 48px; /* Touch-freundliche Größe */
    width: 100%;
    justify-content: center;
  }

  .btn-sm {
    padding: 0.625rem 1rem;
    min-height: 44px;
  }

  .btn-icon {
    width: 48px;
    height: 48px;
    padding: 0.625rem;
  }

  .button-group {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .button-group .btn {
    width: 100%;
  }

  .button-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }

  /* Positionen (Rechnungspositionen) */
  .position {
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    align-items: stretch;
    border-radius: var(--border-radius-sm);
  }

  .position input,
  .position select {
    width: 100% !important;
    min-width: 0;
    margin: 0;
    font-size: 16px; /* Verhindert Zoom auf iOS */
  }

  .position .leistung-select,
  .position .beschreibung,
  .position .menge,
  .position .preis {
    width: 100% !important;
    flex: 1 1 100% !important;
  }

  /* Dashboard */
  .dashboard-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
  }

  .dashboard-card {
    padding: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    min-height: auto;
  }

  .dashboard-card-title {
    font-size: 0.75rem;
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
  }

  .dashboard-card-value {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
    line-height: 1.2;
    word-break: break-word;
  }

  .dashboard-card-change {
    font-size: 0.8125rem;
  }

  .dashboard-layout {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
  }

  .dashboard-column {
    gap: var(--spacing-md);
  }

  /* Charts */
  .chart-container {
    padding: var(--spacing-sm);
    min-height: 220px;
    overflow-x: auto;
  }

  .chart-bars {
    height: 180px;
    padding: var(--spacing-sm);
    gap: var(--spacing-xs);
    min-width: 400px;
  }

  .chart-label {
    font-size: 0.625rem;
    bottom: -1.5rem;
    transform: rotate(-45deg);
    transform-origin: top left;
  }

  .chart-note {
    font-size: 0.75rem;
    margin-top: var(--spacing-sm);
  }

  /* Status Overview */
  .status-overview {
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
  }

  .status-item {
    padding: var(--spacing-sm);
  }

  .status-info {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xs);
  }

  .status-value {
    font-size: 1rem;
  }

  /* Monthly Stats */
  .monthly-stats {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
  }

  .monthly-stat-item {
    padding: var(--spacing-sm);
  }

  .monthly-stat-value {
    font-size: 1.125rem;
  }

  /* Tabellen - Mobile-optimiert */
  .tabelle-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: var(--spacing-md) 0;
    border-radius: var(--border-radius-sm);
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--gray-700);
  }

  table {
    min-width: 600px; /* Mindestbreite für horizontales Scrollen */
    font-size: 0.875rem;
  }

  th {
    padding: var(--spacing-sm) var(--spacing-xs);
    font-size: 0.75rem;
    white-space: nowrap;
  }

  td {
    padding: var(--spacing-sm) var(--spacing-xs);
    font-size: 0.875rem;
  }

  /* Alternative: Card-basierte Tabellenansicht für sehr kleine Screens */
  @media (max-width: 600px) {
    .tabelle-container {
      overflow-x: visible;
    }

    table, thead, tbody, th, td, tr {
      display: block;
    }

    thead {
      display: none;
    }

    tbody tr {
      margin-bottom: var(--spacing-md);
      border: 1px solid var(--gray-700);
      border-radius: var(--border-radius-sm);
      padding: var(--spacing-md);
      background: var(--bg-card);
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
      transition: var(--transition);
    }

    tbody tr:active {
      transform: scale(0.98);
      background: var(--bg-card-hover);
    }

    tbody tr:last-child {
      margin-bottom: 0;
    }

    td {
      border: none;
      padding: var(--spacing-sm) 0;
      position: relative;
      padding-left: 40%;
      padding-top: var(--spacing-xs);
      padding-bottom: var(--spacing-xs);
      text-align: left;
      min-height: 2.5rem;
      display: flex;
      align-items: center;
      word-break: break-word;
    }

    td:before {
      content: attr(data-label);
      font-weight: 600;
      position: absolute;
      left: 0;
      width: 35%;
      color: var(--text-primary);
      font-size: 0.875rem;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      flex-shrink: 0;
    }

    /* Falls kein data-label vorhanden, verwende den th-Text */
    td:not([data-label]):before {
      content: attr(data-column);
    }

    td:last-child {
      padding-top: var(--spacing-sm);
      border-top: 1px solid var(--gray-700);
      margin-top: var(--spacing-xs);
      padding-left: 0;
      justify-content: flex-start;
      gap: var(--spacing-xs);
    }

    td:last-child:before {
      display: none;
    }

    /* Aktionen-Buttons in Tabellen */
    td:last-child .btn {
      width: auto;
      min-width: auto;
      padding: 0.5rem 1rem;
      font-size: 0.875rem;
      flex: 0 0 auto;
    }

      /* Button-Gruppen in Tabellen */
    td:last-child .button-group {
      flex-direction: row;
      flex-wrap: wrap;
      gap: var(--spacing-xs);
      justify-content: flex-start;
    }

    /* Bessere Darstellung für Status-Badges in Tabellen */
    td span {
      display: inline-block;
      padding: 0.25rem 0.5rem;
      border-radius: 4px;
      font-size: 0.8125rem;
      font-weight: 500;
    }
  }

  /* Toast Notifications */
  .toast-container {
    left: var(--spacing-sm);
    right: var(--spacing-sm);
    top: var(--spacing-sm);
    max-width: none;
    gap: var(--spacing-xs);
  }

  .toast {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
  }

  /* Modal */
  .modal-overlay {
    padding: var(--spacing-sm);
    align-items: flex-end;
  }

  .modal {
    margin: 0;
    padding: var(--spacing-md);
    max-width: 100%;
    max-height: 90vh;
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
    animation: slideUpMobile 0.3s ease-out;
  }

  @keyframes slideUpMobile {
    from {
      transform: translateY(100%);
      opacity: 0;
    }
    to {
      transform: translateY(0);
      opacity: 1;
    }
  }

  .modal-header {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
  }

  .modal-title {
    font-size: 1.25rem;
  }

  .modal-body {
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-sm);
  }

  .modal-footer {
    flex-direction: column-reverse;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
  }

  .modal-footer .btn {
    width: 100%;
  }

  /* Login */
  .login-container {
    margin: var(--spacing-lg) auto;
    padding: var(--spacing-lg);
    max-width: calc(100% - var(--spacing-md) * 2);
  }

  .login-container h2 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-lg);
  }

  /* Utilities */
  .section-title {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
  }

  /* Error/Success Messages */
  .error,
  .success,
  .info {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    margin-top: var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  main {
    padding: 0 var(--spacing-sm);
    margin: var(--spacing-sm) auto;
  }

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

  .card-title {
    font-size: 1.125rem;
  }

  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.375rem; }
  h3 { font-size: 1.125rem; }
  h4 { font-size: 1rem; }

  .topbar-link {
    padding: var(--spacing-sm);
    font-size: 0.875rem;
  }

  .topbar-link span:first-child {
    font-size: 1rem;
  }

  .dashboard-card-value {
    font-size: 1.5rem;
  }

  .login-container {
    margin: var(--spacing-md) auto;
    padding: var(--spacing-md);
  }

  .login-container h2 {
    font-size: 1.5rem;
  }

  input[type="text"],
  input[type="email"],
  input[type="password"],
  input[type="number"],
  input[type="tel"],
  input[type="date"],
  select,
  textarea {
    font-size: 16px; /* Verhindert Zoom auf iOS */
    padding: 0.875rem 0.875rem;
  }

  button,
  .btn {
    padding: 0.875rem 1.25rem;
    font-size: 0.9375rem;
  }
}

/* Touch-optimierte Interaktionen */
@media (hover: none) and (pointer: coarse) {
  /* Größere Touch-Targets */
  .topbar-link,
  button,
  .btn {
    min-height: 48px;
    min-width: 48px;
  }

  /* Entferne Hover-Effekte auf Touch-Geräten */
  .card:hover {
    transform: none;
  }

  .dashboard-card:hover {
    transform: none;
  }

  /* Bessere Touch-Feedback */
  button:active,
  .btn:active,
  .topbar-link:active {
    transform: scale(0.97);
    opacity: 0.8;
  }

  /* Verbesserte Scrollbar für Tabellen auf Touch-Geräten */
  .tabelle-container {
    position: relative;
    scrollbar-width: thin;
    scrollbar-color: var(--gray-600) var(--bg-primary);
  }

  .tabelle-container::-webkit-scrollbar {
    height: 8px;
  }

  .tabelle-container::-webkit-scrollbar-track {
    background: var(--bg-primary);
    border-radius: 4px;
  }

  .tabelle-container::-webkit-scrollbar-thumb {
    background: var(--gray-600);
    border-radius: 4px;
  }

  .tabelle-container::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
  }
}

/* Landscape-Modus Optimierungen */
@media (max-width: 768px) and (orientation: landscape) {
  .modal {
    max-height: 85vh;
  }

  .login-container {
    max-height: 90vh;
    overflow-y: auto;
  }
}