:root {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3d3d3d;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --border-color: #4d4d4d;
    --accent-color: #0078d4;
    --accent-hover: #106ebe;
    --danger-color: #e81123;
    --success-color: #107c10;
    --warning-color: #ff8c00;
}

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

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

.screen {
    min-height: 100vh;
}

.hidden {
    display: none !important;
}

/* Login Screen */
.login-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    gap: 2rem;
}

.login-container h1 {
    font-size: 2.5rem;
    color: var(--accent-color);
}

.login-container p {
    color: var(--text-secondary);
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.navbar-brand h1 {
    font-size: 1.5rem;
    color: var(--accent-color);
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Container */
.container {
    display: flex;
    height: calc(100vh - 4rem);
}

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 1rem 0;
}

.nav-menu {
    display: flex;
    flex-direction: column;
}

.nav-item {
    padding: 0.75rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
}

.nav-item:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-item.active {
    background-color: var(--accent-color);
    color: var(--text-primary);
    border-left: 3px solid var(--text-primary);
}

/* Content */
.content {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
}

.view {
    display: none;
}

.view.active {
    display: block;
}

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

.view-header h2 {
    font-size: 2rem;
}

/* Search Bar */
.search-bar {
    margin-bottom: 1.5rem;
}

.search-bar input {
    width: 100%;
    max-width: 400px;
    padding: 0.75rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 1rem;
}

.search-bar input:focus {
    outline: none;
    border-color: var(--accent-color);
}

/* Data List */
.data-list {
    display: grid;
    gap: 1rem;
}

.data-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    transition: all 0.2s;
}

.data-card:hover {
    border-color: var(--accent-color);
}

.data-card-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 1rem;
}

.data-card-title {
    font-size: 1.25rem;
    font-weight: 600;
}

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

.data-card-body {
    display: grid;
    gap: 0.5rem;
}

.data-field {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 1rem;
}

.data-field-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.data-field-value {
    color: var(--text-primary);
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

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

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

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

.btn-danger:hover {
    opacity: 0.9;
}

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

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background-color: var(--bg-secondary);
    border-radius: 8px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
}

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

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

/* Form Elements */
.form-group {
    margin-bottom: 1.5rem;
}

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

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 1rem;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

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

.form-checkbox {
    margin-right: 0.5rem;
}

/* Status Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 500;
}

.badge-active {
    background-color: var(--success-color);
}

.badge-inactive {
    background-color: var(--text-secondary);
}

.badge-trial {
    background-color: var(--warning-color);
}

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

.spinner {
    border: 3px solid var(--bg-tertiary);
    border-top: 3px solid var(--accent-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

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

/* Error Message */
.error-message {
    background-color: var(--danger-color);
    color: var(--text-primary);
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

/* Table styles */
.table-container {
    overflow-x: auto;
    margin-bottom: 20px;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.data-table thead {
    background: var(--bg-tertiary);
    border-bottom: 2px solid var(--border-color);
}

.data-table th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

.data-table td {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.data-table tbody tr:hover {
    background: var(--bg-tertiary);
}

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

.data-table .btn {
    margin-right: 4px;
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-top: 20px;
    padding: 16px;
}

.pagination-info {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--border-color);
    margin: 2rem 0 1rem 0;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.2s;
    margin-bottom: -2px;
}

.tab-btn:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.tab-btn.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}

.tab-content {
    padding: 1.5rem 0;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

/* Customer Detail View */
.customer-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.info-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
}

.info-section h3 {
    margin-bottom: 1rem;
    color: var(--accent-color);
    font-size: 1.1rem;
}

.info-row {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 1rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.info-row:last-child {
    border-bottom: none;
}

.info-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.info-value {
    color: var(--text-primary);
}

/* B2C User Management Styles */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

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

.stat-value.text-warning {
    color: var(--warning-color);
}

.stat-value.text-success {
    color: var(--success-color);
}

.filter-bar {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

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

.btn-sm.active {
    background-color: var(--accent-color);
    color: var(--text-primary);
}

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

.btn-warning:hover {
    opacity: 0.9;
}

.btn-info {
    background-color: #0078d4;
    color: var(--text-primary);
}

.badge-warning {
    background-color: var(--warning-color);
}

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

.badge-info {
    background-color: #0078d4;
}

.badge-secondary {
    background-color: var(--text-secondary);
}

.text-sm {
    font-size: 0.75rem;
    font-family: 'Courier New', monospace;
}

.text-muted {
    color: var(--text-secondary);
}

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 1rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
}

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