/* Light Mode (Default) - CSS Variables */
:root {
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-muted: #999999;
    --bg-primary: #ffffff;
    --bg-secondary: #f7f9fc;
    --bg-tertiary: #f8f9fa;
    --border-color: #dee2e6;
    --card-shadow: rgba(0, 0, 0, 0.08);
    --card-shadow-hover: rgba(0, 0, 0, 0.12);
    --navbar-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --welcome-card-color: #ffffff;
    --table-hover-bg: #f9f9f9;
    --input-bg: #ffffff;
    --input-border: #e0e0e0;
    --input-focus-border: #667eea;
    --input-focus-shadow: rgba(102, 126, 234, 0.1);
}

/* Dark Mode - Override CSS Variables */
[data-theme="dark"] {
    --text-primary: #e8e8e8;
    --text-secondary: #b8b8b8;
    --text-muted: #888888;
    --bg-primary: #1e1e1e;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;
    --border-color: #444444;
    --card-shadow: rgba(0, 0, 0, 0.3);
    --card-shadow-hover: rgba(0, 0, 0, 0.5);
    --navbar-bg: linear-gradient(135deg, #4a5f8f 0%, #5a3f7a 100%);
    --welcome-card-color: #e8e8e8;
    --table-hover-bg: #2d2d2d;
    --input-bg: #2d2d2d;
    --input-border: #444444;
    --input-focus-border: #7b8fd9;
    --input-focus-shadow: rgba(123, 143, 217, 0.2);
}

/* Apply Theme Variables to Elements */
body {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.footer {
    background-color: var(--bg-tertiary);
    border-top-color: var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.navbar-dark {
    background: var(--navbar-bg) !important;
    transition: background 0.3s ease;
}

.welcome-card {
    color: var(--welcome-card-color);
    transition: color 0.3s ease;
}

.welcome-card h1 {
    color: #1a1a2e;
    transition: color 0.3s ease;
    font-weight: 700;
}

.welcome-card p {
    color: rgba(255, 255, 255, 0.95);
}

[data-theme="dark"] .welcome-card h1 {
    color: #ffffff;
}

.stat-card {
    background: var(--bg-primary);
    color: var(--text-primary);
    box-shadow: 0 2px 8px var(--card-shadow);
    transition: background 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
}

.stat-card:hover {
    box-shadow: 0 8px 20px var(--card-shadow-hover);
}

.stat-content h3 {
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.stat-content p {
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.card {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border-color: var(--border-color);
    box-shadow: 0 2px 8px var(--card-shadow);
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    box-shadow: 0 8px 24px var(--card-shadow-hover);
}

.card-header {
    background-color: var(--bg-tertiary);
    border-bottom-color: var(--border-color);
    color: var(--text-primary);
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.card-header.bg-light {
    background-color: var(--bg-tertiary) !important;
    color: var(--text-primary) !important;
}

.card-header h1,
.card-header h2,
.card-header h3,
.card-header h4,
.card-header h5,
.card-header h6 {
    color: var(--text-primary);
    transition: color 0.3s ease;
    margin-bottom: 0;
}

.card-body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.card-footer {
    background-color: var(--bg-tertiary);
    border-top-color: var(--border-color);
    color: var(--text-primary);
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

/* Ensure good contrast in dark mode for card content */
[data-theme="dark"] .card {
    border-color: #444444;
}

[data-theme="dark"] .card-header {
    background-color: #3a3a3a;
    color: #e8e8e8;
}

[data-theme="dark"] .card-header h1,
[data-theme="dark"] .card-header h2,
[data-theme="dark"] .card-header h3,
[data-theme="dark"] .card-header h4,
[data-theme="dark"] .card-header h5,
[data-theme="dark"] .card-header h6 {
    color: #e8e8e8;
}

[data-theme="dark"] .card-body {
    background-color: #1e1e1e;
}

.module-card {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.module-card .card-title {
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.module-card .card-text {
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.table {
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    transition: color 0.3s ease, background-color 0.3s ease;
}

.table thead th {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-color);
    border-bottom: 2px solid var(--border-color) !important;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
    font-weight: 600;
}

.table tbody {
    background-color: var(--bg-secondary);
    transition: background-color 0.3s ease;
}

.table tbody td {
    background-color: var(--bg-secondary);
    border-bottom-color: var(--border-color);
    color: var(--text-primary);
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.table tbody tr {
    background-color: var(--bg-secondary);
    transition: background-color 0.3s ease;
}

.table tbody tr:hover {
    background-color: var(--table-hover-bg) !important;
    transition: background-color 0.3s ease;
}

/* Empty table state */
.table tbody td.text-center {
    color: var(--text-secondary);
}

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

/* Badge styling for tables */
.table .badge {
    transition: all 0.3s ease;
}

.form-control, 
.form-select {
    background-color: var(--input-bg);
    color: var(--text-primary);
    border-color: var(--input-border);
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.form-control::placeholder {
    color: var(--text-muted);
    transition: color 0.3s ease;
}

.form-control:disabled,
.form-select:disabled {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    border-color: var(--input-border);
}

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

.form-label {
    color: var(--text-primary);
    transition: color 0.3s ease;
    font-weight: 600;
}

.form-text {
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.list-group-item {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border-color: var(--border-color);
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

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

.list-group-item.active {
    background-color: #667eea;
    border-color: #667eea;
    color: white;
}

[data-theme="dark"] .list-group-item.active {
    background-color: #7b8fd9;
    border-color: #7b8fd9;
}

/* Alert Styling */
.alert-success {
    background-color: rgba(34, 197, 94, 0.15);
    color: #22c55e;
    border-left-color: #22c55e;
}

[data-theme="dark"] .alert-success {
    background-color: rgba(34, 197, 94, 0.2);
    color: #86efac;
    border-left-color: #86efac;
}

.alert-danger {
    background-color: rgba(239, 68, 68, 0.15);
    color: #ef4444;
    border-left-color: #ef4444;
}

[data-theme="dark"] .alert-danger {
    background-color: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
    border-left-color: #fca5a5;
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.15);
    color: #f59e0b;
    border-left-color: #f59e0b;
}

[data-theme="dark"] .alert-warning {
    background-color: rgba(245, 158, 11, 0.2);
    color: #fcd34d;
    border-left-color: #fcd34d;
}

.alert-info {
    background-color: rgba(59, 130, 246, 0.15);
    color: #3b82f6;
    border-left-color: #3b82f6;
}

[data-theme="dark"] .alert-info {
    background-color: rgba(59, 130, 246, 0.2);
    color: #93c5fd;
    border-left-color: #93c5fd;
}

/* Theme Toggle Button */
.theme-toggle {
    background: none;
    border: none;
    color: white;
    font-size: 18px;
    cursor: pointer;
    padding: 5px 10px;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: rotate(20deg);
}

.theme-toggle:focus {
    outline: none;
}

/* Dropdown Styling for Dark Mode */
[data-theme="dark"] .dropdown-menu {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

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

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

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

/* Close Button for Dark Mode */
[data-theme="dark"] .btn-close {
    filter: invert(1);
}

/* Empty State Message */
.empty-state-message {
    color: var(--text-secondary);
    transition: color 0.3s ease;
    font-size: 16px;
}

.empty-state-message i {
    opacity: 0.6;
    transition: opacity 0.3s ease;
}

/* Text Utilities */
.text-muted {
    color: var(--text-muted) !important;
    transition: color 0.3s ease;
}

.text-secondary {
    color: var(--text-secondary) !important;
    transition: color 0.3s ease;
}

.text-primary {
    color: var(--text-primary) !important;
    transition: color 0.3s ease;
}

/* Code blocks and inline code */
code, 
pre {
    background-color: var(--input-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 2px 6px;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

pre {
    padding: 10px;
    overflow-x: auto;
}

pre code {
    padding: 0;
    border: none;
    background-color: transparent;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    transition: color 0.3s ease;
}

/* Bootstrap Utility Classes - Dark Mode Overrides */
.bg-light {
    background-color: var(--bg-secondary) !important;
    transition: background-color 0.3s ease;
}

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

/* Ensure form elements in bg-light sections have proper contrast */
.bg-light .form-control,
.bg-light .form-select {
    background-color: var(--input-bg);
    color: var(--text-primary);
    border-color: var(--input-border);
}

[data-theme="dark"] .bg-light .form-control,
[data-theme="dark"] .bg-light .form-select {
    background-color: var(--input-bg);
    color: var(--text-primary);
    border-color: var(--input-border);
}

.bg-light .form-label {
    color: var(--text-primary);
}

[data-theme="dark"] .bg-light .form-label {
    color: var(--text-primary);
}