/**
 * Email Send App — Modern Dark Theme
 * WCAG AAA Accessible | Minimal | Clean
 *
 * @package EmailSendApp
 * @version 3.0
 */

/* ===========================================
   1. DESIGN TOKENS
   =========================================== */
:root {
    /* Neutral Scale (Zinc) */
    --bg-primary: #09090b;
    --bg-surface: #18181b;
    --bg-elevated: #27272a;
    --bg-hover: #3f3f46;

    /* Text */
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;

    /* Accent (Indigo) */
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --accent-subtle: rgba(99, 102, 241, 0.12);
    --accent-ring: rgba(99, 102, 241, 0.4);

    /* Status */
    --success: #22c55e;
    --success-subtle: rgba(34, 197, 94, 0.12);
    --danger: #ef4444;
    --danger-subtle: rgba(239, 68, 68, 0.12);
    --warning: #f59e0b;
    --warning-subtle: rgba(245, 158, 11, 0.12);
    --info: #3b82f6;
    --info-subtle: rgba(59, 130, 246, 0.12);

    /* Borders */
    --border: rgba(255, 255, 255, 0.07);
    --border-hover: rgba(255, 255, 255, 0.14);
    --border-strong: rgba(255, 255, 255, 0.2);

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);

    /* Radius */
    --radius-sm: 6px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    /* Transitions */
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --duration-fast: 150ms;
    --duration: 200ms;

    /* Typography */
    --font-sans: "Atkinson Hyperlegible", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
    --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
    --leading: 1.6;
    --leading-tight: 1.3;
}

/* ===========================================
   2. BASE & RESET
   =========================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary) !important;
    color: var(--text-primary) !important;
    line-height: var(--leading);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.app-body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary) !important;
    line-height: var(--leading-tight);
    letter-spacing: -0.01em;
}

p, li, td, th, span, div, label {
    color: inherit;
}

a {
    color: var(--accent-hover);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease);
}

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

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

/* ===========================================
   3. ACCESSIBILITY
   =========================================== */

/* Skip Link */
.skip-link {
    position: absolute;
    top: -100%;
    left: 1rem;
    z-index: 10000;
    padding: 0.75rem 1.25rem;
    background: var(--accent);
    color: #fff;
    font-weight: 700;
    font-size: 0.875rem;
    border-radius: var(--radius);
    text-decoration: none;
    opacity: 0;
    transition: top var(--duration) var(--ease), opacity var(--duration) var(--ease);
}

.skip-link:focus {
    top: 1rem;
    opacity: 1;
    outline: 3px solid var(--text-primary);
    outline-offset: 2px;
    color: #fff;
}

/* Focus-Visible — keyboard-only focus rings */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

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

/* High Contrast Mode */
@media (prefers-contrast: more) {
    :root {
        --border: rgba(255, 255, 255, 0.25);
        --border-hover: rgba(255, 255, 255, 0.4);
        --text-muted: #a1a1aa;
        --bg-elevated: #3f3f46;
    }
}

/* ===========================================
   4. SCROLLBAR
   =========================================== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--bg-hover);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--bg-hover) transparent;
}

/* ===========================================
   5. LAYOUT
   =========================================== */
@media (min-width: 992px) {
    .container-fluid {
        padding-left: 2.5rem;
        padding-right: 2.5rem;
    }
}

@media (min-width: 1400px) {
    .container-fluid {
        padding-left: 3.5rem;
        padding-right: 3.5rem;
    }
}

/* ===========================================
   6. DROPDOWNS
   =========================================== */
.dropdown-menu {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-hover);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 0.375rem;
    margin-top: 0.25rem;
}

.dropdown-item {
    color: var(--text-secondary);
    border-radius: var(--radius);
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    transition: color var(--duration-fast) var(--ease),
                background-color var(--duration-fast) var(--ease);
}

.dropdown-item:hover,
.dropdown-item:focus {
    background-color: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
}

.dropdown-item.active {
    background-color: var(--accent-subtle);
    color: var(--accent-hover);
}

.dropdown-divider {
    border-color: var(--border);
    margin: 0.25rem 0;
}

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

/* ===========================================
   7. CARDS
   =========================================== */
.card {
    background-color: var(--bg-surface) !important;
    border: 1px solid var(--border) !important;
    border-radius: var(--radius-md);
    box-shadow: none;
    transition: border-color var(--duration) var(--ease);
}

.card:hover {
    border-color: var(--border-hover) !important;
}

.card-header {
    background-color: transparent !important;
    border-bottom: 1px solid var(--border) !important;
    color: var(--text-primary) !important;
    padding: 1rem 1.25rem;
    font-weight: 600;
    font-size: 0.9375rem;
}

.card-body {
    color: var(--text-primary);
    padding: 1.25rem;
}

.card-footer {
    background-color: transparent !important;
    border-top: 1px solid var(--border) !important;
    padding: 1rem 1.25rem;
}

/* ===========================================
   8. BUTTONS
   =========================================== */
.btn {
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
    border: none;
    cursor: pointer;
    transition: background-color var(--duration-fast) var(--ease),
                color var(--duration-fast) var(--ease),
                box-shadow var(--duration-fast) var(--ease);
}

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

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

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--accent-hover);
    color: #fff;
}

.btn-primary:active {
    background-color: #5558e6;
}

.btn-secondary {
    background-color: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

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

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

.btn-success:hover {
    background-color: #16a34a;
    color: #fff;
}

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

.btn-danger:hover {
    background-color: #dc2626;
    color: #fff;
}

.btn-warning {
    background-color: var(--warning);
    color: #18181b;
}

.btn-warning:hover {
    background-color: #d97706;
    color: #18181b;
}

.btn-info {
    background-color: var(--info);
    color: #fff;
}

.btn-info:hover {
    background-color: #2563eb;
    color: #fff;
}

/* Outline Buttons */
.btn-outline-primary {
    border: 1px solid var(--accent);
    color: var(--accent-hover);
    background: transparent;
}

.btn-outline-primary:hover,
.btn-outline-primary:focus {
    background-color: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.btn-outline-secondary {
    border: 1px solid var(--border-hover);
    color: var(--text-secondary);
    background: transparent;
}

.btn-outline-secondary:hover {
    background-color: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    border-color: var(--border-strong);
}

.btn-outline-danger {
    border: 1px solid var(--danger);
    color: var(--danger);
    background: transparent;
}

.btn-outline-danger:hover {
    background-color: var(--danger);
    color: #fff;
}

.btn-outline-info {
    border: 1px solid var(--info);
    color: var(--info);
    background: transparent;
}

.btn-outline-info:hover {
    background-color: var(--info);
    color: #fff;
}

.btn-outline-light {
    border: 1px solid var(--border-hover);
    color: var(--text-secondary);
    background: transparent;
}

.btn-outline-light:hover {
    background-color: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

/* Disabled State */
.btn:disabled,
.btn.disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

/* Small Button */
.btn-sm {
    font-size: 0.8125rem;
    padding: 0.3125rem 0.625rem;
    border-radius: var(--radius-sm);
}

/* Close Button */
.btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
    opacity: 0.5;
    transition: opacity var(--duration-fast) var(--ease);
}

.btn-close:hover,
.btn-close:focus {
    opacity: 1;
}

/* ===========================================
   9. FORMS
   =========================================== */
.form-control,
.form-select {
    background-color: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text-primary);
    border-radius: var(--radius);
    font-size: 0.9375rem;
    padding: 0.5625rem 0.875rem;
    transition: border-color var(--duration-fast) var(--ease),
                box-shadow var(--duration-fast) var(--ease);
}

.form-control:hover,
.form-select:hover {
    border-color: var(--border-hover);
}

.form-control:focus,
.form-select:focus {
    background-color: var(--bg-elevated);
    border-color: var(--accent);
    color: var(--text-primary);
    box-shadow: 0 0 0 3px var(--accent-ring);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-control:disabled,
.form-select:disabled {
    background-color: var(--bg-surface);
    border-color: var(--border);
    color: var(--text-muted);
    opacity: 0.5;
}

.form-label {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 0.375rem;
}

.form-text {
    color: var(--text-muted);
    font-size: 0.8125rem;
}

.form-check-input {
    background-color: var(--bg-elevated);
    border: 1.5px solid var(--border-strong);
    width: 1.125rem;
    height: 1.125rem;
    cursor: pointer;
}

.form-check-input:checked {
    background-color: var(--accent);
    border-color: var(--accent);
}

.form-check-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-ring);
}

.form-check-label {
    color: var(--text-primary);
    cursor: pointer;
}

.input-group-text {
    background-color: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Validation */
.is-invalid {
    border-color: var(--danger) !important;
}

.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.3) !important;
}

.is-valid {
    border-color: var(--success) !important;
}

.is-valid:focus {
    box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.3) !important;
}

.invalid-feedback {
    color: var(--danger);
    font-size: 0.8125rem;
}

.valid-feedback {
    color: var(--success);
    font-size: 0.8125rem;
}

/* ===========================================
   10. TABLES
   =========================================== */
.table {
    color: var(--text-primary);
    border-color: var(--border);
    --bs-table-bg: transparent;
    --bs-table-color: var(--text-primary);
}

.table thead th {
    background-color: rgba(255, 255, 255, 0.03);
    border-color: var(--border);
    border-bottom-width: 1px;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.75rem 1rem;
}

.table tbody tr {
    border-color: var(--border);
    transition: background-color var(--duration-fast) var(--ease);
}

.table tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
    --bs-table-bg-state: rgba(255, 255, 255, 0.02);
}

.table td,
.table th {
    border-color: var(--border);
    vertical-align: middle;
    padding: 0.75rem 1rem;
}

.table-responsive {
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

/* ===========================================
   11. ALERTS
   =========================================== */
.alert {
    border-radius: var(--radius-md);
    border: 1px solid;
    padding: 0.875rem 1rem 0.875rem 1.25rem;
    position: relative;
    font-size: 0.9375rem;
}

.alert::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.alert-success {
    background-color: var(--success-subtle);
    color: #86efac;
    border-color: rgba(34, 197, 94, 0.2);
}

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

.alert-danger {
    background-color: var(--danger-subtle);
    color: #fca5a5;
    border-color: rgba(239, 68, 68, 0.2);
}

.alert-danger::before {
    background-color: var(--danger);
}

.alert-warning {
    background-color: var(--warning-subtle);
    color: #fcd34d;
    border-color: rgba(245, 158, 11, 0.2);
}

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

.alert-info {
    background-color: var(--info-subtle);
    color: #93c5fd;
    border-color: rgba(59, 130, 246, 0.2);
}

.alert-info::before {
    background-color: var(--info);
}

/* Alert close button contrast */
.alert .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
    opacity: 0.4;
}

.alert .btn-close:hover {
    opacity: 0.8;
}

/* ===========================================
   12. MODALS
   =========================================== */
.modal-content {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-hover);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.modal-header {
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
    padding: 1.25rem;
}

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

.modal-body {
    color: var(--text-primary);
    padding: 1.25rem;
}

.modal-footer {
    border-top: 1px solid var(--border);
    padding: 1rem 1.25rem;
}

.modal-backdrop.show {
    opacity: 0.6;
}

/* ===========================================
   13. BADGES
   =========================================== */
.badge {
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.75rem;
    padding: 0.25em 0.5em;
    letter-spacing: 0.02em;
}

.bg-primary {
    background-color: var(--accent) !important;
}

.bg-secondary {
    background-color: var(--bg-hover) !important;
}

.bg-success {
    background-color: var(--success) !important;
}

.bg-danger {
    background-color: var(--danger) !important;
}

.bg-warning {
    background-color: var(--warning) !important;
    color: #18181b !important;
}

.bg-info {
    background-color: var(--info) !important;
}

/* ===========================================
   14. PROGRESS BARS
   =========================================== */
.progress {
    background-color: var(--bg-elevated);
    border-radius: var(--radius);
    height: 0.5rem;
    overflow: hidden;
}

.progress-bar {
    border-radius: var(--radius);
    transition: width 0.4s var(--ease);
}

/* ===========================================
   15. PAGINATION
   =========================================== */
.page-link {
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.875rem;
    padding: 0.4375rem 0.75rem;
    transition: all var(--duration-fast) var(--ease);
}

.page-link:hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.page-link:focus {
    box-shadow: 0 0 0 3px var(--accent-ring);
    z-index: 3;
}

.page-item.active .page-link {
    background-color: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.page-item.disabled .page-link {
    background-color: var(--bg-surface);
    border-color: var(--border);
    color: var(--text-muted);
    opacity: 0.4;
}

/* ===========================================
   16. TOASTS
   =========================================== */
.toast {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-hover);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}

.toast-header {
    background-color: transparent;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.625rem 0.875rem;
}

.toast-body {
    padding: 0.75rem 0.875rem;
}

/* ===========================================
   17. BREADCRUMB
   =========================================== */
.breadcrumb {
    background-color: transparent;
    padding: 0;
    margin-bottom: 0;
    font-size: 0.875rem;
}

.breadcrumb-item a {
    color: var(--text-muted);
    transition: color var(--duration-fast) var(--ease);
}

.breadcrumb-item a:hover {
    color: var(--text-primary);
}

.breadcrumb-item.active {
    color: var(--text-secondary);
}

.breadcrumb-item + .breadcrumb-item::before {
    color: var(--text-muted);
}

/* ===========================================
   18. LIST GROUP & CODE
   =========================================== */
.list-group-item {
    background-color: var(--bg-surface) !important;
    border-color: var(--border) !important;
    color: var(--text-primary) !important;
    transition: background-color var(--duration-fast) var(--ease);
}

.list-group-item:hover {
    background-color: rgba(255, 255, 255, 0.03) !important;
}

.list-group-item.active {
    background-color: var(--accent-subtle) !important;
    border-color: var(--accent) !important;
    color: var(--accent-hover) !important;
}

code {
    background-color: var(--bg-elevated);
    color: var(--accent-hover);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.8125em;
}

pre {
    background-color: var(--bg-elevated);
    border-radius: var(--radius);
    padding: 1rem;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
}

/* ===========================================
   19. SPINNER & LOADING
   =========================================== */
.spinner-border {
    border-color: var(--border-strong);
    border-right-color: transparent;
}

.spinner-border-primary,
.spinner-border.text-primary {
    border-color: var(--accent);
    border-right-color: transparent;
}

#loading-spinner {
    backdrop-filter: blur(2px);
}

/* ===========================================
   20. FOOTER
   =========================================== */
footer {
    background-color: var(--bg-surface) !important;
    border-top: 1px solid var(--border) !important;
    color: var(--text-muted) !important;
}

footer small,
footer .text-muted {
    color: var(--text-muted) !important;
    font-size: 0.8125rem;
}

footer strong {
    color: var(--text-secondary) !important;
}

/* ===========================================
   21. STAT CARDS
   =========================================== */
.stat-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    text-align: center;
    transition: border-color var(--duration) var(--ease);
}

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

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-hover);
    line-height: 1;
    margin-bottom: 0.5rem;
    font-variant-numeric: tabular-nums;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* ===========================================
   22. PDF DROPZONE
   =========================================== */
.pdf-dropzone {
    border: 2px dashed var(--border-strong);
    border-radius: var(--radius-md);
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    background-color: rgba(255, 255, 255, 0.01);
    transition: border-color var(--duration) var(--ease),
                background-color var(--duration) var(--ease);
}

.pdf-dropzone:hover {
    border-color: var(--accent);
    background-color: var(--accent-subtle);
}

.pdf-dropzone .pdf-dropzone-icon {
    font-size: 2.5rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    transition: color var(--duration) var(--ease);
}

.pdf-dropzone:hover .pdf-dropzone-icon {
    color: var(--accent-hover);
}

.pdf-dropzone.dragover {
    border-color: var(--accent);
    background-color: var(--accent-subtle);
}

.pdf-dropzone.dragover .pdf-dropzone-icon {
    color: var(--accent-hover);
}

.pdf-dropzone .btn {
    margin-top: 0.75rem;
}

/* ===========================================
   23a. CUSTOMER SELECTION CARDS
   =========================================== */
.customer-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: border-color var(--duration-fast) var(--ease),
                background-color var(--duration-fast) var(--ease);
}

.customer-card:hover {
    border-color: var(--border-hover);
    background: rgba(255, 255, 255, 0.04);
}

.customer-card:has(.customer-checkbox:checked),
.customer-card:has(.pdf-checkbox:checked) {
    border-color: var(--accent);
    background: var(--accent-subtle);
}

.customer-card:has(.customer-checkbox:checked) .customer-card-check,
.customer-card:has(.pdf-checkbox:checked) .customer-card-check {
    opacity: 1;
    color: #fff;
    background: var(--accent);
    border-color: var(--accent);
}

.customer-card.disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.customer-card-body {
    flex: 1;
    min-width: 0;
}

.customer-card-body strong {
    display: block;
    margin-bottom: 0.125rem;
}

.customer-card-check {
    flex-shrink: 0;
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.04);
    border: 1.5px solid var(--border-hover);
    opacity: 0.4;
    transition: opacity var(--duration-fast) var(--ease),
                color var(--duration-fast) var(--ease),
                border-color var(--duration-fast) var(--ease);
    font-size: 0.625rem;
    margin-left: 1rem;
    align-self: center;
}

/* ===========================================
   23b. EMAIL PREVIEW (dark theme fix)
   =========================================== */
#preview-area {
    background-color: var(--bg-surface) !important;
}

#preview-area .card-body {
    color: var(--text-primary);
}

#preview-area .bg-white,
#preview-area .border.rounded.p-3 {
    background-color: var(--bg-elevated) !important;
    color: var(--text-primary) !important;
    border-color: var(--border) !important;
}

#preview-body {
    color: var(--text-secondary) !important;
    line-height: 1.7;
}

/* ===========================================
   23c. LOGIN PAGE
   =========================================== */
body.login-page {
    background-color: #050507;
    color: var(--text-primary);
}

body.login-page .container-fluid {
    min-height: 100vh;
    background: #050507;
    padding: 0;
}

body.login-page main {
    margin-top: 0 !important;
}

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1.5rem;
    background:
        radial-gradient(ellipse at 50% -20%, rgba(99, 102, 241, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 60%, rgba(99, 102, 241, 0.04) 0%, transparent 40%);
}

.login-card {
    background: linear-gradient(165deg, rgba(30, 30, 38, 0.9) 0%, rgba(20, 20, 26, 0.95) 100%);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 20px;
    box-shadow:
        0 24px 48px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.03) inset;
    padding: 2.25rem 2rem 1.5rem;
    width: 100%;
    max-width: 400px;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    backdrop-filter: blur(20px);
}

.login-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.375rem;
    padding-bottom: 0.5rem;
}

.login-title {
    font-size: 1.375rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin: 0;
}

.login-subtitle {
    color: var(--text-muted);
    font-size: 0.8125rem;
    margin: 0;
    letter-spacing: 0.03em;
}

.login-notice {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-left-width: 3px;
    border-radius: var(--radius);
    padding: 0.875rem 1rem;
    font-size: 0.9375rem;
    line-height: 1.5;
    color: var(--text-secondary);
}

.login-notice + .login-notice {
    margin-top: 0.75rem;
}

.login-notice-success {
    border-left-color: var(--success);
    color: #86efac;
}

.login-notice-danger {
    border-left-color: var(--danger);
    color: #fca5a5;
}

.login-notice-info {
    border-left-color: var(--info);
    color: #93c5fd;
}

body.login-page .form-label {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.8125rem;
    margin-bottom: 0.375rem;
    letter-spacing: 0.01em;
}

body.login-page .text-muted {
    color: var(--text-muted) !important;
}

body.login-page .form-control {
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: border-color var(--duration-fast) var(--ease),
                box-shadow var(--duration-fast) var(--ease),
                background-color var(--duration-fast) var(--ease);
}

body.login-page .form-control::placeholder {
    color: rgba(255, 255, 255, 0.25);
}

body.login-page .form-control:hover {
    border-color: rgba(255, 255, 255, 0.14);
    background-color: rgba(255, 255, 255, 0.05);
}

body.login-page .form-control:focus {
    background-color: rgba(255, 255, 255, 0.06);
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-ring);
    color: var(--text-primary);
}

body.login-page .input-group .form-control {
    border-right: none;
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.login-toggle {
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-left: none;
    border-radius: 0 10px 10px 0;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-muted);
    transition: background-color var(--duration-fast) var(--ease),
                color var(--duration-fast) var(--ease);
    padding: 0 1rem;
    display: flex;
    align-items: center;
}

.login-toggle:hover,
.login-toggle:focus {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

.link-button {
    background: none;
    border: none;
    padding: 0;
    color: var(--text-muted);
    font-size: 0.875rem;
    text-decoration: underline;
    text-underline-offset: 2px;
    cursor: pointer;
    transition: color var(--duration-fast) var(--ease);
}

.link-button:hover,
.link-button:focus {
    color: var(--text-primary);
}

body.login-page .form-check-input {
    background-color: rgba(255, 255, 255, 0.04);
    border: 1.5px solid rgba(255, 255, 255, 0.15);
    border-radius: 5px;
}

body.login-page .form-check-input:checked {
    background-color: var(--accent);
    border-color: var(--accent);
}

body.login-page .form-check-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

body.login-page .btn-primary {
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-weight: 700;
    font-size: 0.9375rem;
    transition: background-color var(--duration-fast) var(--ease),
                box-shadow var(--duration-fast) var(--ease);
}

body.login-page .btn-primary:hover {
    background: var(--accent-hover);
    color: #fff;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.login-submit.btn-primary {
    padding: 0.8125rem;
    font-size: 0.9375rem;
    letter-spacing: 0.01em;
}

body.login-page .btn-primary:focus-visible {
    outline: 2px solid var(--text-primary);
    outline-offset: 2px;
}

body.login-page .btn-primary:active {
    background: #5558e6;
    box-shadow: none;
}

body.login-page .btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
    border-radius: 10px;
}

body.login-page .btn-secondary:hover,
body.login-page .btn-secondary:focus {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

body.login-page .modal-content {
    background: linear-gradient(165deg, rgba(30, 30, 38, 0.95) 0%, rgba(20, 20, 26, 0.98) 100%);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 16px;
    color: var(--text-primary);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.5);
}

body.login-page .modal-header,
body.login-page .modal-footer {
    border-color: rgba(255, 255, 255, 0.06);
}

body.login-page .modal-body .form-control {
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    color: var(--text-primary);
}

body.login-page .modal-body .form-control:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-ring);
}

.login-meta small {
    color: rgba(255, 255, 255, 0.2);
    font-size: 0.6875rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.login-caps-warning {
    margin-top: 0.5rem;
    font-size: 0.8125rem;
    color: var(--warning);
}

/* ===========================================
   24. UTILITY OVERRIDES (Bootstrap dark)
   =========================================== */

/* Text Colors */
.text-primary {
    color: var(--accent-hover) !important;
}

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

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

.text-success {
    color: var(--success) !important;
}

.text-danger {
    color: var(--danger) !important;
}

.text-warning {
    color: var(--warning) !important;
}

.text-info {
    color: var(--info) !important;
}

.text-white {
    color: #fff !important;
}

/* Backgrounds */
.bg-light {
    background-color: var(--bg-surface) !important;
}

.bg-dark {
    background-color: var(--bg-primary) !important;
}

/* Borders */
.border {
    border-color: var(--border) !important;
}

.border-top {
    border-top-color: var(--border) !important;
}

.border-bottom {
    border-bottom-color: var(--border) !important;
}

/* Font weight overrides */
.fw-bold,
.font-weight-bold {
    color: var(--text-primary);
}

.lead {
    color: var(--text-secondary) !important;
}

/* Links */
a:not(.btn):not(.nav-link):not(.dropdown-item):not(.page-link):not(.list-group-item) {
    text-underline-offset: 2px;
}

/* Muted text containers */
.text-muted, .small, small {
    color: var(--text-muted) !important;
}

/* Table content */
.table tbody td {
    color: var(--text-primary);
}

.table tbody td small {
    color: var(--text-muted) !important;
}

.table tbody td strong {
    color: var(--text-primary);
}

/* Customer display */
.customer-name,
.customer-number,
.customer-email {
    color: var(--text-primary);
}

/* ===========================================
   25. RESPONSIVE
   =========================================== */
@media (max-width: 768px) {
    .card {
        margin-bottom: 1rem;
        border-radius: var(--radius);
    }

    .modal-dialog {
        margin: 0.75rem;
    }

    .stat-card {
        padding: 1rem;
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .table thead th {
        font-size: 0.6875rem;
    }

    .upload-pill {
        width: calc(100% - 2rem);
        left: 1rem;
        right: 1rem;
    }
}

@media (max-width: 576px) {
    .login-card {
        padding: 2rem 1.5rem;
        margin: 0.5rem;
        border-radius: 16px;
    }

    .card-body {
        padding: 1rem;
    }

    .card-header {
        padding: 0.75rem 1rem;
    }

    .btn {
        font-size: 0.8125rem;
    }

    h1, .h1 { font-size: 1.5rem !important; }
    h2, .h2 { font-size: 1.25rem !important; }
    h3, .h3 { font-size: 1.125rem !important; }
}

/* ===========================================
   27. SIDEBAR NAVIGATION
   =========================================== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 260px;
    height: 100dvh;
    background-color: var(--bg-surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 1040;
    overflow: hidden;
}

.sidebar-brand {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.sidebar-brand a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.125rem;
    text-decoration: none;
    letter-spacing: -0.01em;
}

.sidebar-brand a:hover {
    color: var(--accent-hover);
}

.sidebar-brand i {
    font-size: 1.25rem;
    color: var(--accent);
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem 0;
}

.nav-section {
    padding: 0 0.75rem;
    margin-bottom: 0.25rem;
}

.nav-section-label {
    padding: 0.75rem 0.75rem 0.375rem;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
}

.sidebar-nav .nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.75rem;
    margin: 1px 0;
    border-radius: var(--radius);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease),
                background-color var(--duration-fast) var(--ease);
    position: relative;
}

.sidebar-nav .nav-item:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.sidebar-nav .nav-item.active {
    color: var(--accent-hover);
    background-color: var(--accent-subtle);
}

.sidebar-nav .nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.25rem;
    bottom: 0.25rem;
    width: 3px;
    border-radius: 0 2px 2px 0;
    background-color: var(--accent);
}

.sidebar-nav .nav-item i {
    width: 1.25rem;
    text-align: center;
    font-size: 0.9375rem;
    flex-shrink: 0;
}

/* Sidebar Footer */
.sidebar-footer {
    border-top: 1px solid var(--border);
    padding: 0.75rem;
    padding-bottom: calc(0.75rem + env(safe-area-inset-bottom, 0px));
    flex-shrink: 0;
}

.sidebar-workspace {
    margin-bottom: 0.5rem;
}

.workspace-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.5rem 0.625rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-family: inherit;
    cursor: pointer;
    transition: border-color var(--duration-fast) var(--ease),
                background-color var(--duration-fast) var(--ease);
}

.workspace-toggle:hover {
    border-color: var(--border-hover);
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
}

.workspace-toggle span {
    flex: 1;
    text-align: left;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.workspace-toggle .fa-chevron-down {
    font-size: 0.5625rem;
    opacity: 0.5;
}

.sidebar-user {
    padding: 0.375rem 0.25rem 0;
    gap: 0.5rem;
}

.sidebar-logout {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    transition: background-color var(--duration-fast) var(--ease);
}

.sidebar-logout:hover {
    background: var(--danger-subtle);
}

a.sidebar-user-info {
    text-decoration: none;
}

.sidebar-user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    padding: 0.375rem;
    border-radius: var(--radius);
    transition: background-color var(--duration-fast) var(--ease);
}

.sidebar-user-info:hover {
    background: rgba(255, 255, 255, 0.04);
}

.sidebar-user-info > i {
    font-size: 1.375rem;
    color: var(--text-muted);
}

.user-name {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.2;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 140px;
}

.user-meta {
    font-size: 0.6875rem;
    color: var(--text-muted);
}

.sidebar-user-actions {
    display: flex;
    gap: 0.25rem;
}

.sidebar-user-actions a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.8125rem;
    transition: color var(--duration-fast) var(--ease),
                background-color var(--duration-fast) var(--ease);
}

.sidebar-user-actions a:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.06);
}

.sidebar-user-actions a.text-danger:hover {
    color: var(--danger) !important;
    background: var(--danger-subtle);
}

/* Sidebar Overlay (mobile) */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1030;
    backdrop-filter: blur(2px);
}

.sidebar-overlay.active {
    display: block;
}

/* ===========================================
   28. MAIN WRAPPER (Sidebar Layout)
   =========================================== */
.main-wrapper {
    margin-left: 260px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-wrapper > .container-fluid {
    flex: 1;
}

/* Mobile Header */
.mobile-header {
    display: none;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1020;
}

.mobile-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    cursor: pointer;
    transition: background-color var(--duration-fast) var(--ease);
}

.mobile-toggle:hover {
    background: rgba(255, 255, 255, 0.06);
}

.mobile-title {
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-primary);
}

/* App Footer */
.app-footer {
    padding: 1rem 0;
    margin-top: auto;
    border-top: 1px solid var(--border);
}

/* Responsive Sidebar */
@media (max-width: 991.98px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.25s var(--ease);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-wrapper {
        margin-left: 0;
    }

    .mobile-header {
        display: flex;
    }
}

/* ===========================================
   29. UPLOAD FLOATING PILL
   =========================================== */
.upload-pill {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 340px;
    background: var(--bg-surface);
    border: 1px solid var(--border-hover);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1060;
    overflow: hidden;
    transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}

.upload-pill.hidden {
    opacity: 0;
    transform: translateY(1rem);
    pointer-events: none;
}

.upload-pill-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.625rem 0.875rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.upload-pill-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    font-size: 0.875rem;
    line-height: 1;
    border-radius: var(--radius-sm);
    transition: color var(--duration-fast), background var(--duration-fast);
}

.upload-pill-close:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.06);
}

.upload-pill .progress {
    border-radius: 0;
    height: 3px;
}

.upload-pill-body {
    padding: 0.5rem 0.875rem 0.625rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    max-height: 140px;
    overflow-y: auto;
}

.upload-pill-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.1875rem 0;
}

.upload-pill-item .fa-check { color: var(--success); }
.upload-pill-item .fa-times { color: var(--danger); }
.upload-pill-item .fa-spinner { color: var(--accent); }

.upload-pill.completed {
    border-color: rgba(34, 197, 94, 0.3);
}

.upload-pill.completed .progress-bar {
    background-color: var(--success);
}

/* ===========================================
   30. PRINT
   =========================================== */
@media print {
    body {
        background-color: #fff !important;
        color: #000 !important;
    }

    .sidebar,
    .sidebar-overlay,
    .mobile-header,
    .upload-pill,
    .btn,
    .modal,
    .toast-container,
    .skip-link,
    footer {
        display: none !important;
    }

    .main-wrapper {
        margin-left: 0 !important;
    }

    .card {
        border: 1px solid #ccc !important;
        box-shadow: none !important;
        background-color: #fff !important;
    }

    .table {
        color: #000 !important;
    }

    .table thead th {
        background-color: #f0f0f0 !important;
        color: #000 !important;
    }

    a {
        color: #000 !important;
        text-decoration: underline !important;
    }

    .alert {
        border: 1px solid #ccc !important;
        color: #000 !important;
    }
}

/* ===========================================
   QUILL EDITOR DARK THEME
   =========================================== */
.ql-toolbar.ql-snow {
    background: var(--bg-surface);
    border-color: var(--border) !important;
    border-radius: var(--radius) var(--radius) 0 0;
    padding: 0.5rem;
}

.ql-container.ql-snow {
    border-color: var(--border) !important;
    border-radius: 0 0 var(--radius) var(--radius);
    background: var(--bg-elevated);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
}

.ql-editor {
    color: var(--text-primary);
    min-height: 200px;
    line-height: 1.6;
}
.ql-editor p {
    margin: 0 0 2px;
}

.ql-editor.ql-blank::before {
    color: var(--text-muted);
    font-style: normal;
}

.ql-snow .ql-stroke {
    stroke: var(--text-secondary);
}

.ql-snow .ql-fill,
.ql-snow .ql-stroke.ql-fill {
    fill: var(--text-secondary);
}

.ql-snow .ql-picker {
    color: var(--text-secondary);
}

.ql-snow .ql-picker-options {
    background: var(--bg-surface);
    border-color: var(--border-hover) !important;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
}

.ql-snow .ql-picker-item:hover,
.ql-snow .ql-picker-item.ql-selected {
    color: var(--accent-hover);
}

.ql-toolbar.ql-snow button:hover,
.ql-toolbar.ql-snow button.ql-active {
    color: var(--accent-hover);
}

.ql-toolbar.ql-snow button:hover .ql-stroke,
.ql-toolbar.ql-snow button.ql-active .ql-stroke {
    stroke: var(--accent-hover);
}

.ql-toolbar.ql-snow button:hover .ql-fill,
.ql-toolbar.ql-snow button.ql-active .ql-fill {
    fill: var(--accent-hover);
}

.ql-snow .ql-tooltip {
    background: var(--bg-surface);
    border-color: var(--border);
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius);
}

.ql-snow .ql-tooltip input[type=text] {
    background: var(--bg-elevated);
    border-color: var(--border);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
}

.ql-snow .ql-tooltip a {
    color: var(--accent-hover);
}

/* ===========================================
   BOOTSTRAP ACCORDION DARK THEME
   =========================================== */
.accordion-button {
    background: var(--bg-elevated) !important;
    color: var(--text-primary) !important;
    border-color: var(--border) !important;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: none !important;
}

.accordion-button:not(.collapsed) {
    background: var(--bg-surface) !important;
    color: var(--accent-hover) !important;
}

.accordion-button::after {
    filter: invert(1) grayscale(100%) brightness(200%);
}

.accordion-body {
    background: var(--bg-surface) !important;
    border-color: var(--border) !important;
}

.accordion-item {
    background: transparent !important;
    border-color: var(--border) !important;
}

/* ===========================================
   BOOTSTRAP TABS DARK THEME
   =========================================== */
.nav-tabs {
    border-bottom-color: var(--border);
}

.nav-tabs .nav-link {
    color: var(--text-secondary);
    border-color: transparent;
    border-radius: var(--radius) var(--radius) 0 0;
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color var(--duration-fast) var(--ease),
                background-color var(--duration-fast) var(--ease);
}

.nav-tabs .nav-link:hover {
    color: var(--text-primary);
    border-color: var(--border) var(--border) transparent;
    background: rgba(255, 255, 255, 0.03);
}

.nav-tabs .nav-link.active {
    color: var(--accent-hover);
    background: var(--bg-surface);
    border-color: var(--border) var(--border) var(--bg-surface);
}