/* Default Theme - Professional and Clean */
:root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --secondary-color: #6b7280;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --background-color: #f8fafc;
    --surface-color: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --border-radius: 0.5rem;
    --border-radius-lg: 1rem;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Login Screen */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    padding: 20px;
}

.login-box {
    background: var(--surface-color);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.login-header h1 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

/* App Container */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    height: 4rem;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.header-left i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.header-left h1 {
    font-size: 1.25rem;
    font-weight: 600;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-selector select {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--surface-color);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Navigation */
.main-nav {
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 0 1rem;
    display: flex;
    justify-content: center;
    overflow-x: auto;
}

.nav-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 1rem 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: all 0.2s ease;
    border-bottom: 3px solid transparent;
    white-space: nowrap;
}

.nav-btn:hover {
    color: var(--primary-color);
    background-color: rgba(59, 130, 246, 0.05);
}

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

.nav-btn i {
    font-size: 1.25rem;
}

/* Main Content */
.main-content {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
    width: 100%;
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.section-header h2 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 600;
}

.section-controls {
    margin-bottom: 2rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Search */
.search-container {
    position: relative;
    flex: 1;
    min-width: 250px;
}

.search-container i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.search-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    background: var(--surface-color);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-icon {
    width: 3rem;
    height: 3rem;
    border-radius: var(--border-radius);
    background: rgba(59, 130, 246, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.5rem;
}

.stat-content {
    flex: 1;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
}

.card, .dashboard-card {
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover, .dashboard-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.card h3, .dashboard-card h3 {
    margin-bottom: 1rem;
    font-size: 1.125rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Settings Grid */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}

.settings-card {
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.settings-content {
    margin-top: 1rem;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

input, select, textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    background: var(--surface-color);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

textarea {
    resize: vertical;
    min-height: 80px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background: #4b5563;
    transform: translateY(-1px);
}

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

.btn-danger:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

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

.btn-success:hover {
    background: #059669;
    transform: translateY(-1px);
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 1.5rem 0;
    margin-bottom: 1rem;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.close {
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

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

/* Lists */
.booking-list, .service-list, .services-list, .users-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.booking-item, .service-item, .user-item {
    padding: 1rem;
    background: var(--background-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.item-content {
    flex: 1;
}

.item-actions {
    display: flex;
    gap: 0.5rem;
}

/* Photo Upload Section */
.photo-upload-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.photo-upload-section h4 {
    margin-bottom: 1rem;
    font-size: 1rem;
    font-weight: 600;
}

/* Status Indicators */
.status-indicator {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.status-scheduled {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
}

.status-completed {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.status-cancelled {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.status-connected {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.status-disconnected {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

/* Date Filter */
.date-filter {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.date-filter input, .date-filter select {
    min-width: 150px;
}

/* Database Controls */
.database-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1rem;
}

/* Error Messages */
.error-message {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    padding: 0.75rem;
    border-radius: var(--border-radius);
    margin-top: 1rem;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.success-message {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    padding: 0.75rem;
    border-radius: var(--border-radius);
    margin-top: 1rem;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        height: auto;
        padding: 1rem 0;
        gap: 1rem;
    }
    
    .main-nav {
        justify-content: flex-start;
    }
    
    .nav-btn {
        flex-direction: row;
        padding: 0.75rem 1rem;
        font-size: 0.875rem;
    }
    
    .nav-btn i {
        font-size: 1rem;
    }
    
    .section-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .settings-grid {
        grid-template-columns: 1fr;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        width: 95%;
        margin: 1rem;
    }
    
    .database-controls {
        flex-direction: column;
    }
    
    .date-filter {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: 1rem 0.5rem;
    }
    
    .card, .dashboard-card, .settings-card {
        padding: 1rem;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .modal-header {
        padding: 1rem 1rem 0;
    }
    
    .login-box {
        padding: 1.5rem;
    }
}

/* Theme Variations */

/* Minimal Theme */
.theme-minimal {
    --primary-color: #000000;
    --primary-hover: #333333;
    --secondary-color: #666666;
    --success-color: #22c55e;
    --warning-color: #eab308;
    --danger-color: #ef4444;
    --background-color: #ffffff;
    --surface-color: #f9fafb;
    --text-primary: #000000;
    --text-secondary: #666666;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

/* Dark Theme */
.theme-dark {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --secondary-color: #6b7280;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --background-color: #111827;
    --surface-color: #1f2937;
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --border-color: #374151;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
}

/* Pastel Theme */
.theme-pastel {
    --primary-color: #ec4899;
    --primary-hover: #db2777;
    --secondary-color: #8b5cf6;
    --success-color: #06d6a0;
    --warning-color: #ffd23f;
    --danger-color: #ff6b9d;
    --background-color: #fef7ff;
    --surface-color: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #f3e8ff;
    --shadow: 0 4px 6px -1px rgba(236, 72, 153, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(236, 72, 153, 0.1);
}