/* CSS Variables for Theming */
:root {
    --color-primary: #0066cc;
    --color-primary-hover: #0052a3;
    --color-secondary: #6c757d;
    --color-secondary-hover: #5a6268;
    --color-success: #28a745;
    --color-warning: #ffc107;
    --color-danger: #dc3545;
    --color-info: #17a2b8;
    
    --color-text: #212529;
    --color-text-light: #6c757d;
    --color-text-muted: #868e96;
    --color-bg: #ffffff;
    --color-bg-light: #f8f9fa;
    --color-bg-dark: #e9ecef;
    --color-border: #dee2e6;
    --color-border-light: #e9ecef;
    
    --color-status-draft: #6c757d;
    --color-status-require-customer-signature: #ffc107;
    --color-status-completed: #28a745;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    --border-radius: 0.375rem;
    --border-radius-lg: 0.5rem;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    --transition: all 0.2s ease-in-out;
    
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

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

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-bg-light);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

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

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.header-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.last-updated {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.last-updated-label {
    margin-right: var(--spacing-xs);
}

.last-updated-time {
    font-weight: 500;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    background-color: transparent;
    font-family: inherit;
}

.btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

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

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-hover);
}

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

.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-bg-dark);
}

.btn-icon {
    font-size: 1rem;
}

/* Main Content */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* Search and Filters */
.filters-section {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.search-container {
    position: relative;
    margin-bottom: var(--spacing-lg);
}

.search-input {
    width: 100%;
    padding: var(--spacing-sm) 2.5rem var(--spacing-sm) 2.5rem;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.search-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-light);
    pointer-events: none;
}

.search-clear-btn {
    position: absolute;
    right: var(--spacing-xs);
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--color-text-light);
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    padding: var(--spacing-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.5rem;
    height: 1.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    z-index: 1;
}

.search-clear-btn:hover {
    background-color: var(--color-bg-dark);
    color: var(--color-text);
}

.search-clear-btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.filters-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    min-width: 150px;
}

.filter-group-checkboxes {
    min-width: 200px;
}

.filter-group-daterange {
    min-width: 300px;
}

.filter-group-reset {
    align-self: flex-start;
    min-width: auto;
    justify-content: flex-start;
}

.filter-label-hidden {
    visibility: hidden;
    height: 1.25rem;
    margin: 0;
    line-height: 1.25rem;
}

.btn-reset-filters {
    white-space: nowrap;
    font-size: 0.875rem;
    padding: var(--spacing-sm) var(--spacing-md);
    height: auto;
    min-height: 2.25rem;
    align-self: flex-start;
    margin-top: 0;
}

.filter-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
}

.filter-select,
.date-input {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-family: inherit;
    min-width: 140px;
}

.date-input[type="date"] {
    cursor: pointer;
    position: relative;
}

.date-input[type="date"]::-webkit-calendar-picker-indicator {
    cursor: pointer;
    opacity: 0.6;
    margin-left: var(--spacing-xs);
}

.date-input[type="date"]::-webkit-calendar-picker-indicator:hover {
    opacity: 1;
}

.filter-select:focus,
.date-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.filter-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    user-select: none;
}

.filter-toggle input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    cursor: pointer;
}

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

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

.filter-checkbox {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    user-select: none;
}

.filter-checkbox input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    cursor: pointer;
}

.filter-checkbox span {
    font-size: 0.875rem;
    color: var(--color-text);
}

.daterange-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.daterange-separator {
    color: var(--color-text-light);
    font-size: 0.875rem;
}

/* Loading, Error, Empty States */
.loading-state,
.error-state,
.empty-state {
    text-align: center;
    padding: var(--spacing-xxl);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
}

.spinner {
    width: 3rem;
    height: 3rem;
    border: 4px solid var(--color-border-light);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

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

.error-icon,
.empty-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.error-state h2,
.empty-state h2 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.error-state p,
.empty-state p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

/* Table */
.table-container {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.results-info {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    font-size: 0.875rem;
    color: var(--color-text-light);
    font-weight: 500;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.btn-export-inline {
    font-size: 0.875rem;
    padding: var(--spacing-xs) var(--spacing-sm);
}

.table-wrapper {
    overflow-x: auto;
    max-height: 70vh;
    overflow-y: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.data-table thead {
    position: sticky;
    top: 0;
    background-color: var(--color-bg-dark);
    z-index: 10;
}

.data-table th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    color: var(--color-text);
    border-bottom: 2px solid var(--color-border);
    white-space: nowrap;
    position: relative;
}

.data-table th.sortable {
    cursor: pointer;
    user-select: none;
    position: relative;
    padding-right: 1.5rem;
}

/* Column resize handle */
.data-table th .resize-handle {
    position: absolute;
    top: 0;
    right: 0;
    width: 4px;
    height: 100%;
    cursor: col-resize;
    background-color: transparent;
    z-index: 2;
    user-select: none;
    touch-action: none;
}

.data-table th .resize-handle:hover {
    background-color: var(--color-primary);
    opacity: 0.7;
}

.data-table th.resizing .resize-handle {
    background-color: var(--color-primary);
    opacity: 1;
}

.data-table th.resizing {
    user-select: none;
}

/* Ensure sort indicator doesn't overlap with resize handle */
.data-table th.sortable .sort-indicator {
    right: 0.5rem;
    z-index: 1;
}

.data-table th.sortable:hover {
    background-color: var(--color-bg);
}

.sort-indicator {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    opacity: 0.5;
}

.data-table th.sortable[data-sort-direction="asc"] .sort-indicator::after {
    content: '▲';
    opacity: 1;
}

.data-table th.sortable[data-sort-direction="desc"] .sort-indicator::after {
    content: '▼';
    opacity: 1;
}

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

.data-table tbody tr {
    transition: var(--transition);
}

.data-table tbody tr:hover {
    background-color: var(--color-bg-light);
    cursor: pointer;
}

.data-table tbody tr:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: -2px;
}

/* Badges */
.badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    font-weight: 500;
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    border-radius: var(--border-radius);
}

.badge-status {
    background-color: var(--color-status-draft);
    color: white;
}

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

.badge-status.status-require_customer_signature {
    background-color: var(--color-status-require-customer-signature);
    color: var(--color-text);
}

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

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

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

.badge-sales.not_required {
    background-color: var(--color-bg-dark);
    color: var(--color-text-light);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.pagination-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.page-size-select {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: inherit;
}

.page-size-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.pagination-text {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.pagination-controls {
    display: flex;
    gap: var(--spacing-sm);
}

/* Drawer */
.drawer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    animation: fadeIn 0.2s ease-in-out;
}

.drawer-overlay[hidden] {
    display: none;
}

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

.drawer {
    width: 100%;
    max-width: 600px;
    height: 100%;
    background-color: var(--color-bg);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    animation: slideIn 0.3s ease-out;
    overflow: hidden;
}

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

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

.drawer-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
}

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

.drawer-close:hover {
    background-color: var(--color-bg-dark);
    color: var(--color-text);
}

.drawer-close:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.drawer-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
}

.drawer-field {
    margin-bottom: var(--spacing-lg);
}

.drawer-field-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
}

.drawer-field-value {
    font-size: 1rem;
    color: var(--color-text);
    word-wrap: break-word;
}

.drawer-field-value.empty {
    color: var(--color-text-muted);
    font-style: italic;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .filters-container {
        flex-direction: column;
    }

    .filter-group {
        width: 100%;
    }

    .table-wrapper {
        max-height: 60vh;
    }

    .data-table {
        font-size: 0.75rem;
    }

    .data-table th,
    .data-table td {
        padding: var(--spacing-sm);
    }

    .pagination {
        flex-direction: column;
        align-items: stretch;
    }

    .pagination-info {
        justify-content: space-between;
        width: 100%;
    }

    .drawer {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: var(--spacing-md);
    }

    .filters-section {
        padding: var(--spacing-md);
    }

    .daterange-group {
        flex-direction: column;
        align-items: stretch;
    }

    .daterange-separator {
        display: none;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Login Page */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: var(--spacing-lg);
    z-index: 9999;
    transition: opacity 0.3s ease-out;
    overflow-y: auto;
}

.login-page[hidden] {
    display: none !important;
    opacity: 0;
    pointer-events: none;
}

.login-container {
    background: var(--color-bg);
    padding: var(--spacing-xxl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
    max-width: 400px;
    width: 100%;
}

.login-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.login-title {
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.login-description {
    font-size: 1rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.btn-login {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    min-height: 44px;
}

.btn-login:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.microsoft-icon {
    display: inline-block;
    width: 1.25rem;
    height: 1.25rem;
    background-color: #f25022;
    color: white;
    font-weight: bold;
    font-size: 0.875rem;
    line-height: 1.25rem;
    text-align: center;
    border-radius: 2px;
}

.auth-error {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: #fee;
    color: var(--color-danger);
    border: 1px solid var(--color-danger);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
}

.user-info {
    padding: var(--spacing-xs) var(--spacing-md);
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.875rem;
    border-right: 1px solid var(--color-border);
    padding-right: var(--spacing-lg);
    margin-right: var(--spacing-sm);
}

/* Viewer Page - Header and Main Content */
.header {
    display: block;
    opacity: 1;
    transition: opacity 0.3s ease-in;
}

.header[hidden] {
    display: none !important;
    opacity: 0;
}

.main-content {
    display: block;
    opacity: 1;
    transition: opacity 0.3s ease-in;
}

.main-content[hidden] {
    display: none !important;
    opacity: 0;
}

/* Responsive login page */
@media (max-width: 480px) {
    .login-container {
        padding: var(--spacing-xl);
    }
    
    .login-title {
        font-size: 1.5rem;
    }
    
    .user-info {
        display: none;
    }
}