/* Dark Theme for Excel Academy */

[data-theme="dark"] {
    --excel-green: #2d9254;
    --excel-green-light: #38a862;
    --excel-green-dark: #24804a;
    --excel-green-rgb: 45, 146, 84;
    --bg-light: #1a1a2e;
    --bg-white: #16213e;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0b0;
    --border-color: #2a2a4a;
    --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.3);
    --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.5);
    color-scheme: dark;
}

/* Smooth theme transition */
body {
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Body */
[data-theme="dark"] body {
    background-color: var(--bg-light);
    color: var(--text-primary);
}

/* Navbar */
[data-theme="dark"] .navbar {
    background-color: #0f1529 !important;
    border-bottom: 1px solid var(--border-color);
}

[data-theme="dark"] .navbar .nav-link {
    color: var(--text-secondary);
}

[data-theme="dark"] .navbar .nav-link:hover,
[data-theme="dark"] .navbar .nav-link.active {
    color: var(--text-primary);
}

[data-theme="dark"] .navbar-brand {
    color: var(--excel-green) !important;
}

[data-theme="dark"] .navbar-toggler {
    border-color: var(--border-color);
}

[data-theme="dark"] .navbar-toggler-icon {
    filter: invert(1);
}

[data-theme="dark"] .btn-outline-secondary {
    color: var(--text-secondary);
    border-color: var(--border-color);
}

[data-theme="dark"] .btn-outline-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

[data-theme="dark"] .dropdown-menu {
    background-color: #1e2746;
    border-color: var(--border-color);
}

[data-theme="dark"] .dropdown-item {
    color: var(--text-secondary);
}

[data-theme="dark"] .dropdown-item:hover {
    background-color: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

[data-theme="dark"] .dropdown-divider {
    border-color: var(--border-color);
}

/* Cards */
[data-theme="dark"] .card {
    background-color: var(--bg-white);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .card-header {
    background-color: rgba(255, 255, 255, 0.05);
    border-bottom-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .card-body {
    color: var(--text-primary);
}

[data-theme="dark"] .card-footer {
    background-color: rgba(255, 255, 255, 0.03);
    border-top-color: var(--border-color);
}

/* Buttons */
[data-theme="dark"] .btn-outline-excel {
    color: var(--excel-green);
    border-color: var(--excel-green);
}

[data-theme="dark"] .btn-outline-excel:hover {
    background-color: var(--excel-green);
    color: #fff;
}

/* Forms */
[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background-color: #1e2746;
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    background-color: #243052;
    border-color: var(--excel-green);
    color: var(--text-primary);
    box-shadow: 0 0 0 0.25rem rgba(var(--excel-green-rgb), 0.25);
}

[data-theme="dark"] .form-control::placeholder {
    color: #6c6c8a;
}

[data-theme="dark"] .input-group-text {
    background-color: #1e2746;
    border-color: var(--border-color);
    color: var(--text-secondary);
}

/* Tables */
[data-theme="dark"] .table {
    color: var(--text-primary);
    border-color: var(--border-color);
}

[data-theme="dark"] .table > :not(caption) > * > * {
    background-color: transparent;
    border-bottom-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .table-striped > tbody > tr:nth-of-type(odd) > * {
    background-color: rgba(255, 255, 255, 0.03);
}

[data-theme="dark"] .table-hover > tbody > tr:hover > * {
    background-color: rgba(255, 255, 255, 0.06);
}

/* Alerts */
[data-theme="dark"] .alert-info {
    background-color: rgba(13, 110, 253, 0.15);
    border-color: rgba(13, 110, 253, 0.3);
    color: #6ea8fe;
}

[data-theme="dark"] .alert-success {
    background-color: rgba(25, 135, 84, 0.15);
    border-color: rgba(25, 135, 84, 0.3);
    color: #75b798;
}

[data-theme="dark"] .alert-warning {
    background-color: rgba(255, 193, 7, 0.15);
    border-color: rgba(255, 193, 7, 0.3);
    color: #ffda6a;
}

[data-theme="dark"] .alert-danger {
    background-color: rgba(220, 53, 69, 0.15);
    border-color: rgba(220, 53, 69, 0.3);
    color: #ea868f;
}

/* Badges */
[data-theme="dark"] .badge.bg-light {
    background-color: #2a2a4a !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .badge.bg-info {
    background-color: rgba(13, 202, 240, 0.2) !important;
    color: #6edff6 !important;
}

/* Footer */
[data-theme="dark"] footer {
    background-color: #0f1529 !important;
    border-top-color: var(--border-color) !important;
    color: var(--text-secondary);
}

[data-theme="dark"] footer h5,
[data-theme="dark"] footer h6 {
    color: var(--text-primary);
}

[data-theme="dark"] footer a.text-muted {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] footer a.text-muted:hover {
    color: var(--excel-green) !important;
}

[data-theme="dark"] footer hr {
    border-color: var(--border-color);
}

[data-theme="dark"] footer small.text-muted {
    color: var(--text-secondary) !important;
}

/* Breadcrumbs */
[data-theme="dark"] .breadcrumb {
    background-color: transparent;
}

[data-theme="dark"] .breadcrumb-item a {
    color: var(--excel-green);
}

[data-theme="dark"] .breadcrumb-item.active {
    color: var(--text-secondary);
}

/* Progress bars */
[data-theme="dark"] .progress {
    background-color: #2a2a4a;
}

/* Accordion (FAQ) */
[data-theme="dark"] .accordion-item {
    background-color: var(--bg-white);
    border-color: var(--border-color);
}

[data-theme="dark"] .accordion-button {
    background-color: var(--bg-white);
    color: var(--text-primary);
}

[data-theme="dark"] .accordion-button:not(.collapsed) {
    background-color: rgba(var(--excel-green-rgb), 0.15);
    color: var(--excel-green);
}

[data-theme="dark"] .accordion-button::after {
    filter: invert(1);
}

[data-theme="dark"] .accordion-body {
    background-color: var(--bg-white);
    color: var(--text-primary);
}

/* Sidebar */
[data-theme="dark"] .sidebar .list-group-item {
    background-color: transparent;
    color: var(--text-secondary);
}

[data-theme="dark"] .sidebar .list-group-item:hover {
    background-color: rgba(var(--excel-green-rgb), 0.1);
    color: var(--text-primary);
}

[data-theme="dark"] .sidebar .list-group-item.active {
    background-color: rgba(var(--excel-green-rgb), 0.2);
    color: var(--excel-green);
}

/* List group */
[data-theme="dark"] .list-group-item {
    background-color: var(--bg-white);
    border-color: var(--border-color);
    color: var(--text-primary);
}

/* Pagination */
[data-theme="dark"] .page-link {
    background-color: var(--bg-white);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .page-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--excel-green);
}

[data-theme="dark"] .page-item.active .page-link {
    background-color: var(--excel-green);
    border-color: var(--excel-green);
}

[data-theme="dark"] .page-item.disabled .page-link {
    background-color: #1a1a2e;
    border-color: var(--border-color);
    color: #4a4a6a;
}

/* Hero section - keep as is since it has its own bg */

/* Tags */
[data-theme="dark"] .tag {
    background-color: rgba(var(--excel-green-rgb), 0.2);
}

/* FAQ probability */
[data-theme="dark"] .faq-probability {
    background-color: #2a2a4a;
    color: var(--text-secondary);
}

/* Ad container */
[data-theme="dark"] .ad-container {
    background-color: var(--bg-white);
    border-color: var(--border-color);
}

/* Search form */
[data-theme="dark"] .search-form .form-control {
    background-color: #1e2746;
    border-color: var(--border-color);
    color: var(--text-primary);
}

/* Lesson navigation */
[data-theme="dark"] .lesson-nav a {
    background-color: var(--bg-white);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .lesson-nav a:hover {
    border-color: var(--excel-green);
    color: var(--excel-green);
}

/* Blog card */
[data-theme="dark"] .blog-meta {
    color: var(--text-secondary);
}

/* Text utilities */
[data-theme="dark"] .text-muted {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .text-dark {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .bg-white {
    background-color: var(--bg-white) !important;
}

[data-theme="dark"] .bg-light {
    background-color: var(--bg-light) !important;
}

[data-theme="dark"] .border {
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .border-top {
    border-top-color: var(--border-color) !important;
}

[data-theme="dark"] .border-bottom {
    border-bottom-color: var(--border-color) !important;
}

/* Modal */
[data-theme="dark"] .modal-content {
    background-color: #1e2746;
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .modal-header {
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .modal-footer {
    border-top-color: var(--border-color);
}

[data-theme="dark"] .btn-close {
    filter: invert(1);
}

/* Code blocks */
[data-theme="dark"] code {
    color: #e685b5;
    background-color: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] pre {
    background-color: #0d1117;
    color: #c9d1d9;
    border-color: var(--border-color);
}

/* Theme toggle button */
.theme-toggle {
    background: none;
    border: 1px solid transparent;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.375rem 0.5rem;
    border-radius: 0.375rem;
    font-size: 1.1rem;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    background-color: rgba(128, 128, 128, 0.15);
    color: var(--text-primary);
}

/* Analytics notice */
[data-theme="dark"] .analytics-notice {
    background-color: var(--bg-white);
    border-color: var(--border-color);
}

/* ========================================
   Trainer / Exercise page dark overrides
   ======================================== */

/* Trainer grid */
[data-theme="dark"] .trainer-grid-container {
    border-color: var(--border-color);
}

[data-theme="dark"] .trainer-table th,
[data-theme="dark"] .trainer-table td {
    border-color: #2a2a4a;
}

[data-theme="dark"] .trainer-table thead th {
    background: linear-gradient(to bottom, #1e2746, #19203a);
    color: #a0a0b0;
}

[data-theme="dark"] .trainer-table th.row-header {
    background: linear-gradient(to right, #1e2746, #19203a);
    color: #a0a0b0;
}

[data-theme="dark"] .trainer-cell {
    background: #16213e;
    color: var(--text-primary);
}

[data-theme="dark"] .trainer-cell:hover {
    background-color: #1e2f55;
}

[data-theme="dark"] .trainer-cell.selected {
    background-color: #1a3050 !important;
    outline-color: #3b82f6;
}

[data-theme="dark"] .trainer-cell.correct {
    background-color: #1a3a2a !important;
    color: #4ade80;
}

[data-theme="dark"] .trainer-cell.incorrect {
    background-color: #3a1a1a !important;
    color: #f87171;
}

[data-theme="dark"] .trainer-cell input {
    color: var(--text-primary);
}

[data-theme="dark"] .trainer-formula-bar {
    background: #1a1f35;
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .trainer-toolbar {
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .trainer-result-panel {
    border-top-color: var(--border-color);
}

[data-theme="dark"] .trainer-task-panel {
    background-color: var(--bg-white);
}

[data-theme="dark"] .trainer-loading {
    color: var(--text-secondary);
}

[data-theme="dark"] .hint-text {
    background: rgba(13, 202, 240, 0.1);
    color: var(--text-primary);
}

/* Frozen panes */
[data-theme="dark"] .trainer-table .frozen-row {
    background: #16213e;
    border-bottom-color: #3b82f6;
}

[data-theme="dark"] .trainer-table .frozen-col {
    background: #16213e;
    border-right-color: #3b82f6;
}

/* Exercise detail standalone page */
[data-theme="dark"] .navbar-excel {
    background: #0f1529;
    border-bottom: 1px solid var(--border-color);
}

[data-theme="dark"] .breadcrumb-section {
    background: #16213e;
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .breadcrumb-section a {
    color: var(--excel-green);
}

[data-theme="dark"] .panel {
    background: #16213e;
    border-color: var(--border-color);
}

[data-theme="dark"] .panel-header {
    border-bottom-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .panel-header i {
    color: var(--text-secondary);
}

[data-theme="dark"] .panel-body {
    color: var(--text-primary);
}

[data-theme="dark"] .exercise-title,
[data-theme="dark"] .theory-title {
    color: var(--excel-green);
}

[data-theme="dark"] .theory-content {
    color: var(--text-primary);
}

[data-theme="dark"] .theory-content code {
    background: rgba(255, 255, 255, 0.08);
    color: var(--excel-green);
}

[data-theme="dark"] .task-box {
    background: #1a2235;
    border-left-color: #d4a017;
    color: var(--text-primary);
}

[data-theme="dark"] .hint-btn {
    background: #1e2746;
    border-color: var(--border-color);
    color: var(--text-secondary);
}

[data-theme="dark"] .hint-btn:hover {
    background: #243052;
}

[data-theme="dark"] .hint-content {
    background: #1a1f35;
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .btn-reset {
    background: #1e2746;
    border-color: var(--border-color);
    color: var(--text-secondary);
}

[data-theme="dark"] .btn-reset:hover {
    background: #243052;
}

[data-theme="dark"] .exercise-nav .btn,
[data-theme="dark"] .lesson-nav .btn {
    background: #16213e;
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .exercise-nav .btn:hover,
[data-theme="dark"] .lesson-nav .btn:hover {
    background: #1e2746;
    border-color: var(--excel-green);
    color: var(--excel-green);
}

[data-theme="dark"] .footer-simple {
    background: #0f1529;
    border-top-color: var(--border-color);
    color: var(--text-secondary);
}

/* Work panel overrides */
[data-theme="dark"] .work-panel #excel-trainer {
    background: #16213e;
}

[data-theme="dark"] .work-panel .trainer-formula-bar {
    background: #1a1f35;
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .work-panel .trainer-grid-container {
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .work-panel .trainer-table th {
    background: #1a1f35;
    color: #a0a0b0;
}

[data-theme="dark"] .work-panel .trainer-result-panel {
    background: #1a1f35;
}

/* Quiz styles */
[data-theme="dark"] .quiz-choice-label {
    color: var(--text-primary);
}

[data-theme="dark"] .quiz-choice-label:hover {
    background: rgba(255, 255, 255, 0.05);
}

/* Tools page */
[data-theme="dark"] .tools-header {
    background: linear-gradient(135deg, #1a5c38 0%, #0f3a22 100%);
}

[data-theme="dark"] .autofill-toolbar {
    background-color: #1e2746;
    border-color: var(--border-color);
}

[data-theme="dark"] #spreadsheet-container {
    border-color: var(--border-color);
}

[data-theme="dark"] .formula-check-section {
    background-color: #16213e;
    border-color: var(--border-color);
}

[data-theme="dark"] .formula-check-section input.form-control {
    background-color: #1e2746;
    color: var(--text-primary);
    border-color: var(--border-color);
}

/* Syntax highlighting (dark) */
[data-theme="dark"] .formula-highlight .function,
[data-theme="dark"] .formula-highlight .function_start,
[data-theme="dark"] .formula-highlight .function_stop {
    color: #4ade80;
}

[data-theme="dark"] .formula-highlight .quote_mark,
[data-theme="dark"] .formula-highlight .text {
    color: #60a5fa;
}

[data-theme="dark"] .formula-highlight .number {
    color: #f472b6;
}

[data-theme="dark"] .formula-highlight .error {
    color: #f87171;
}

[data-theme="dark"] .formula-highlight .operator {
    color: #a78bfa;
}

[data-theme="dark"] .formula-highlight .logical {
    color: #fb923c;
}

[data-theme="dark"] .formula-highlight .range {
    color: #34d399;
}

[data-theme="dark"] .formula-highlight .tabbed {
    border-left-color: #4a4a6a;
}

[data-theme="dark"] #token-table code {
    color: #4ade80;
}

/* Conditional formatting dark mode */
[data-theme="dark"] .cf-green {
    background-color: #1a3a2a !important;
    color: #4ade80;
}

[data-theme="dark"] .cf-yellow {
    background-color: #3a3520 !important;
    color: #fbbf24;
}

[data-theme="dark"] .cf-red {
    background-color: #3a1a1a !important;
    color: #f87171;
}

/* ========================================
   Additional Bootstrap overrides
   ======================================== */

/* Headings */
[data-theme="dark"] h1,
[data-theme="dark"] h2,
[data-theme="dark"] h3,
[data-theme="dark"] h4,
[data-theme="dark"] h5,
[data-theme="dark"] h6 {
    color: var(--text-primary);
}

/* Table light header */
[data-theme="dark"] .table-light {
    background-color: #1e2746 !important;
    color: var(--text-primary);
}

[data-theme="dark"] .table-light th,
[data-theme="dark"] .table-light td {
    background-color: #1e2746 !important;
    color: var(--text-primary) !important;
    border-color: var(--border-color);
}

/* Card header bg-light */
[data-theme="dark"] .card-header.bg-light {
    background-color: #1e2746 !important;
    color: var(--text-primary);
}

/* Card bg-light (legend etc.) */
[data-theme="dark"] .card.bg-light {
    background-color: var(--bg-white) !important;
}

/* Card border-bottom inside card */
[data-theme="dark"] .border-bottom {
    border-bottom-color: var(--border-color) !important;
}

/* Badge bg-warning */
[data-theme="dark"] .badge.bg-warning {
    background-color: rgba(255, 193, 7, 0.25) !important;
    color: #ffda6a !important;
}

/* Badge bg-danger */
[data-theme="dark"] .badge.bg-danger {
    background-color: rgba(220, 53, 69, 0.25) !important;
    color: #ea868f !important;
}

/* Badge bg-success */
[data-theme="dark"] .badge.bg-success {
    background-color: rgba(25, 135, 84, 0.25) !important;
    color: #75b798 !important;
}

/* Form labels */
[data-theme="dark"] .form-label {
    color: var(--text-primary);
}

/* Form helper text — Bootstrap defaults to a dark secondary color
   that becomes unreadable on dark backgrounds. */
[data-theme="dark"] .form-text {
    color: var(--text-secondary);
}

/* Links in tables */
[data-theme="dark"] a.text-decoration-none {
    color: var(--excel-green);
}

[data-theme="dark"] a.fw-medium {
    color: var(--excel-green);
}

/* Text utilities */
[data-theme="dark"] .text-primary {
    color: #6ea8fe !important;
}

[data-theme="dark"] .text-success {
    color: #75b798 !important;
}

[data-theme="dark"] .text-warning {
    color: #ffda6a !important;
}

[data-theme="dark"] .text-danger {
    color: #ea868f !important;
}

/* Card title */
[data-theme="dark"] .card-title {
    color: var(--text-primary);
}

[data-theme="dark"] .card-text {
    color: var(--text-secondary);
}

/* Home page trainer demo result */
.trainer-demo-result {
    background: #d4edda;
    color: #155724;
}

[data-theme="dark"] .trainer-demo-result {
    background: rgba(25, 135, 84, 0.2);
    color: #75b798;
}

/* Border-0 shadow cards in dark (accordion items etc.) */
[data-theme="dark"] .shadow-sm {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.4) !important;
}

/* btn-light in dark mode */
[data-theme="dark"] .btn-light {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

[data-theme="dark"] .btn-light:hover {
    background-color: rgba(255, 255, 255, 0.25);
    color: #fff;
}

/* btn-outline-light stays fine in dark mode since it's designed for dark bg */

/* Card footer bg-transparent */
[data-theme="dark"] .card-footer.bg-transparent {
    background-color: transparent !important;
    border-top-color: var(--border-color) !important;
}

/* Scrollbar dark mode */
[data-theme="dark"] ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

[data-theme="dark"] ::-webkit-scrollbar-track {
    background: #1a1a2e;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: #3a3a5a;
    border-radius: 4px;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: #4a4a6a;
}