/* ===== Global Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #764ba2;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-500: #6b7280;
    --gray-700: #374151;
    --gray-900: #111827;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    --radius: 10px;
    --radius-lg: 15px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--gray-900);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== Navigation ===== */
.navbar {
    background: white;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
}

.logo {
    font-size: 28px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 5px;
}

.nav-menu a {
    padding: 10px 20px;
    color: var(--gray-700);
    text-decoration: none;
    border-radius: var(--radius);
    transition: all 0.2s;
    font-weight: 500;
}

.nav-menu a:hover {
    background: var(--gray-100);
    color: var(--primary);
}

.nav-menu a.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
}

/* ===== Main Content ===== */
.main-content {
    padding: 30px 20px;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.page-header h1 {
    color: white;
    font-size: 32px;
    font-weight: 700;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

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

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

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-300);
}

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

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

.btn-sm {
    padding: 8px 16px;
    font-size: 14px;
}

.btn-icon {
    padding: 8px 12px;
    background: var(--gray-100);
    border-radius: var(--radius);
    text-decoration: none;
    transition: all 0.2s;
    font-size: 18px;
}

.btn-icon:hover {
    background: var(--gray-200);
    transform: scale(1.1);
}

/* ===== Cards ===== */
.card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    margin-bottom: 30px;
    overflow: hidden;
}

.card-header {
    padding: 20px 25px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-900);
}

.card-body {
    padding: 25px;
}

/* ===== Stats Grid ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: var(--shadow-lg);
    transition: transform 0.2s;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
}

.stat-icon.blue { background: #dbeafe; }
.stat-icon.green { background: #d1fae5; }
.stat-icon.purple { background: #ede9fe; }
.stat-icon.orange { background: #fed7aa; }

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--gray-900);
}

.stat-label {
    font-size: 14px;
    color: var(--gray-500);
    margin-top: 4px;
}

/* ===== Dashboard Grid ===== */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

/* ===== Chart Bars ===== */
.chart-bars {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.chart-bar-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.chart-bar-label {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-700);
}

.chart-bar-value {
    color: var(--primary);
}

.chart-bar-bg {
    height: 12px;
    background: var(--gray-100);
    border-radius: 6px;
    overflow: hidden;
}

.chart-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 6px;
    transition: width 0.5s ease;
}

.chart-bar-info {
    font-size: 12px;
    color: var(--gray-500);
}

/* ===== List Items ===== */
.list-items {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.list-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: var(--gray-50);
    border-radius: var(--radius);
    transition: all 0.2s;
}

.list-item:hover {
    background: var(--gray-100);
}

.list-item-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
}

.list-item-content {
    flex: 1;
}

.list-item-title {
    font-weight: 600;
    color: var(--gray-900);
}

.list-item-subtitle {
    font-size: 13px;
    color: var(--gray-500);
}

.list-item-value {
    font-weight: 700;
    font-size: 16px;
    color: var(--primary);
}

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

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

.data-table th {
    background: var(--gray-50);
    padding: 12px 15px;
    text-align: left;
    font-weight: 600;
    font-size: 13px;
    color: var(--gray-700);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table td {
    padding: 15px;
    border-bottom: 1px solid var(--gray-200);
}

.data-table tbody tr:hover {
    background: var(--gray-50);
}

/* ===== Badges ===== */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    background: var(--gray-100);
    color: var(--gray-700);
}

.status-badge {
    display: inline-block;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}

.status-offen {
    background: #fef3c7;
    color: #92400e;
}

.status-gebucht {
    background: #dbeafe;
    color: #1e40af;
}

.status-bezahlt {
    background: #d1fae5;
    color: #065f46;
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--gray-700);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 15px;
    transition: all 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

select.form-control {
    cursor: pointer;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

/* ===== Upload Zone ===== */
.upload-zone {
    border: 3px dashed var(--primary);
    border-radius: var(--radius-lg);
    padding: 60px 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: white;
}

.upload-zone:hover {
    border-color: var(--secondary);
    background: var(--gray-50);
}

.upload-zone.dragover {
    background: #f0f4ff;
    border-color: var(--secondary);
    transform: scale(1.02);
}

/* ===== Preview ===== */
.preview {
    margin: 30px 0;
    text-align: center;
}

.preview img {
    max-width: 100%;
    max-height: 400px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

/* ===== Action Buttons ===== */
.action-buttons {
    display: flex;
    gap: 8px;
}

/* ===== Alerts ===== */
.alert {
    padding: 15px 20px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-weight: 500;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 2px solid #10b981;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 2px solid #ef4444;
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border: 2px solid #3b82f6;
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border: 2px solid #f59e0b;
}

/* ===== Loading ===== */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--primary);
    font-weight: 600;
    font-size: 18px;
}

.loading::after {
    content: '...';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% { content: '.'; }
    40% { content: '..'; }
    60%, 100% { content: '...'; }
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-500);
}

.empty-state a {
    color: var(--primary);
    font-weight: 600;
}

/* ===== Result Box ===== */
.result-box {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: 25px;
    margin-top: 30px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-200);
}

.result-item:last-child {
    border-bottom: none;
}

.result-label {
    font-weight: 600;
    color: var(--gray-600);
}

.result-value {
    color: var(--gray-900);
    text-align: right;
    font-weight: 500;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .stats-grid,
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .data-table {
        font-size: 14px;
    }
    
    .data-table th,
    .data-table td {
        padding: 10px;
    }
}