/* Theme CSS Variables and Dark Mode Support */

:root {
    /* Light theme colors (default) */
    --bg-primary: #f3f4f6;       /* gray-100 */
    --bg-secondary: #ffffff;      /* white */
    --bg-tertiary: #f9fafb;       /* gray-50 */
    --bg-hover: #e5e7eb;          /* gray-200 */

    --text-primary: #1f2937;      /* gray-800 */
    --text-secondary: #374151;    /* gray-700 */
    --text-tertiary: #6b7280;     /* gray-500 */
    --text-muted: #9ca3af;        /* gray-400 */

    --border-primary: #e5e7eb;    /* gray-200 */
    --border-secondary: #d1d5db;  /* gray-300 */

    --accent-blue: #3b82f6;       /* blue-500 */
    --accent-blue-hover: #2563eb; /* blue-600 */
    --accent-green: #10b981;      /* green-500 */
    --accent-amber: #f59e0b;      /* amber-500 */
    --accent-red: #dc2626;        /* red-600 */
    --accent-purple: #8b5cf6;     /* purple-500 */

    /* Module colors - light */
    --module-bg: #dbeafe;         /* blue-100 */
    --module-border: #93c5fd;     /* blue-300 */
    --module-hover: #bfdbfe;      /* blue-200 */
    --module-accent: #3b82f6;     /* blue-500 */

    /* Lesson colors - light */
    --lesson-bg: #dcfce7;         /* green-100 */
    --lesson-border: #86efac;     /* green-300 */
    --lesson-hover: #bbf7d0;      /* green-200 */
    --lesson-accent: #10b981;     /* green-500 */

    /* Blueprint colors - light */
    --blueprint-bg: #fef3c7;      /* amber-100 */
    --blueprint-border: #fcd34d;  /* amber-300 */
    --blueprint-hover: #fde68a;   /* amber-200 */
    --blueprint-accent: #f59e0b;  /* amber-500 */

    /* Task colors - light */
    --task-bg: #e9d5ff;           /* purple-100 */
    --task-border: #c4b5fd;       /* purple-300 */
    --task-hover: #ddd6fe;        /* purple-200 */
    --task-accent: #8b5cf6;       /* purple-500 */

    /* Shadow colors */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px 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);

    /* Modal overlay */
    --overlay-bg: rgba(0, 0, 0, 0.5);

    /* Code/JSON colors */
    --code-bg: #f3f4f6;
    --code-key: #881391;
    --code-value: #1976d2;
    --code-string: #0b7500;

    /* Input backgrounds */
    --input-bg: #ffffff;
    --input-border: #d1d5db;
    --input-focus: #3b82f6;

    /* Kanban */
    --kanban-bg: #f3f4f6;
    --kanban-header-bg: #ffffff;
}

/* Dark theme */
[data-theme="dark"] {
    --bg-primary: #111827;        /* gray-900 */
    --bg-secondary: #1f2937;      /* gray-800 */
    --bg-tertiary: #374151;       /* gray-700 */
    --bg-hover: #4b5563;          /* gray-600 */

    --text-primary: #f9fafb;      /* gray-50 */
    --text-secondary: #e5e7eb;    /* gray-200 */
    --text-tertiary: #9ca3af;     /* gray-400 */
    --text-muted: #6b7280;        /* gray-500 */

    --border-primary: #374151;    /* gray-700 */
    --border-secondary: #4b5563;  /* gray-600 */

    --accent-blue: #60a5fa;       /* blue-400 */
    --accent-blue-hover: #3b82f6; /* blue-500 */
    --accent-green: #34d399;      /* green-400 */
    --accent-amber: #fbbf24;      /* amber-400 */
    --accent-red: #f87171;        /* red-400 */
    --accent-purple: #a78bfa;     /* purple-400 */

    /* Module colors - dark (muted, subtle) */
    --module-bg: #1e293b;
    --module-border: #475569;
    --module-hover: #293548;
    --module-accent: #60a5fa;

    /* Lesson colors - dark (muted, subtle) */
    --lesson-bg: #1a2e2a;
    --lesson-border: #374151;
    --lesson-hover: #233b36;
    --lesson-accent: #34d399;

    /* Blueprint colors - dark (muted, subtle) */
    --blueprint-bg: #292524;
    --blueprint-border: #44403c;
    --blueprint-hover: #352f2c;
    --blueprint-accent: #fbbf24;

    /* Task colors - dark (muted, subtle) */
    --task-bg: #27272a;
    --task-border: #3f3f46;
    --task-hover: #323236;
    --task-accent: #a78bfa;

    /* Shadow colors - darker for dark mode */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);

    /* Modal overlay - darker */
    --overlay-bg: rgba(0, 0, 0, 0.8);

    /* Code/JSON colors - dark mode */
    --code-bg: #1f2937;
    --code-key: #c084fc;
    --code-value: #60a5fa;
    --code-string: #4ade80;

    /* Input backgrounds */
    --input-bg: #374151;
    --input-border: #4b5563;
    --input-focus: #60a5fa;

    /* Kanban */
    --kanban-bg: #1f2937;
    --kanban-header-bg: #374151;
}

/* Base element styles using CSS variables */
body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Override Tailwind classes for theming */
[data-theme="dark"] .bg-white {
    background-color: var(--bg-secondary) !important;
}

[data-theme="dark"] .bg-gray-50 {
    background-color: var(--bg-tertiary) !important;
}

[data-theme="dark"] .bg-gray-100 {
    background-color: var(--bg-primary) !important;
}

[data-theme="dark"] .bg-gray-200 {
    background-color: var(--bg-hover) !important;
}

[data-theme="dark"] .text-gray-900,
[data-theme="dark"] .text-gray-800 {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .text-gray-700 {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .text-gray-600,
[data-theme="dark"] .text-gray-500 {
    color: var(--text-tertiary) !important;
}

[data-theme="dark"] .text-gray-400 {
    color: var(--text-muted) !important;
}

[data-theme="dark"] .border-gray-200,
[data-theme="dark"] .border-gray-300 {
    border-color: var(--border-primary) !important;
}

[data-theme="dark"] .divide-gray-200 > :not([hidden]) ~ :not([hidden]) {
    border-color: var(--border-primary) !important;
}

/* Shadow overrides */
[data-theme="dark"] .shadow,
[data-theme="dark"] .shadow-md {
    box-shadow: var(--shadow-md) !important;
}

[data-theme="dark"] .shadow-sm {
    box-shadow: var(--shadow-sm) !important;
}

[data-theme="dark"] .shadow-lg {
    box-shadow: var(--shadow-lg) !important;
}

/* Input and form elements */
[data-theme="dark"] input,
[data-theme="dark"] textarea,
[data-theme="dark"] select {
    background-color: var(--input-bg) !important;
    border-color: var(--input-border) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] input::placeholder,
[data-theme="dark"] textarea::placeholder {
    color: var(--text-muted) !important;
}

[data-theme="dark"] input:focus,
[data-theme="dark"] textarea:focus,
[data-theme="dark"] select:focus {
    border-color: var(--input-focus) !important;
    box-shadow: 0 0 0 2px rgba(96, 165, 250, 0.3) !important;
}

/* Card and panel backgrounds */
[data-theme="dark"] .bg-blue-50,
[data-theme="dark"] .bg-green-50,
[data-theme="dark"] .bg-amber-50,
[data-theme="dark"] .bg-purple-50,
[data-theme="dark"] .bg-red-50 {
    background-color: var(--bg-tertiary) !important;
}

/* Hover states */
[data-theme="dark"] .hover\:bg-gray-50:hover,
[data-theme="dark"] .hover\:bg-gray-100:hover {
    background-color: var(--bg-hover) !important;
}

/* Modal backgrounds */
[data-theme="dark"] .bg-gray-900.bg-opacity-50,
[data-theme="dark"] .bg-gray-900.bg-opacity-80 {
    background-color: var(--overlay-bg) !important;
}

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

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

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

[data-theme="dark"] tr:hover {
    background-color: var(--bg-hover);
}

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

[data-theme="dark"] ::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 4px;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* Theme toggle button */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background-color: transparent;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.theme-toggle:hover {
    background-color: var(--bg-hover);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

.theme-toggle:hover svg {
    color: var(--accent-blue);
}

/* Sun icon (shown in dark mode) */
.theme-toggle .sun-icon {
    display: none;
}

/* Moon icon (shown in light mode) */
.theme-toggle .moon-icon {
    display: block;
}

[data-theme="dark"] .theme-toggle .sun-icon {
    display: block;
}

[data-theme="dark"] .theme-toggle .moon-icon {
    display: none;
}

/* Ring/focus states */
[data-theme="dark"] .ring-blue-500 {
    --tw-ring-color: var(--accent-blue) !important;
}

/* Disabled states */
[data-theme="dark"] button:disabled,
[data-theme="dark"] input:disabled {
    background-color: var(--bg-tertiary) !important;
    color: var(--text-muted) !important;
    cursor: not-allowed;
}

/* Link colors */
[data-theme="dark"] a {
    color: var(--accent-blue);
}

[data-theme="dark"] a:hover {
    color: var(--accent-blue-hover);
}

/* Selection highlight */
[data-theme="dark"] ::selection {
    background-color: rgba(96, 165, 250, 0.3);
    color: var(--text-primary);
}

/* Notifications styling */
[data-theme="dark"] .notification {
    background-color: var(--bg-secondary);
    border-color: var(--border-primary);
    color: var(--text-primary);
}

/* Badge/chip styling */
[data-theme="dark"] .bg-blue-100 {
    background-color: rgba(59, 130, 246, 0.2) !important;
}

[data-theme="dark"] .bg-green-100 {
    background-color: rgba(16, 185, 129, 0.2) !important;
}

[data-theme="dark"] .bg-amber-100,
[data-theme="dark"] .bg-yellow-100 {
    background-color: rgba(245, 158, 11, 0.2) !important;
}

[data-theme="dark"] .bg-red-100 {
    background-color: rgba(239, 68, 68, 0.2) !important;
}

[data-theme="dark"] .bg-purple-100 {
    background-color: rgba(139, 92, 246, 0.2) !important;
}

[data-theme="dark"] .text-blue-600,
[data-theme="dark"] .text-blue-700,
[data-theme="dark"] .text-blue-800 {
    color: var(--accent-blue) !important;
}

[data-theme="dark"] .text-green-600,
[data-theme="dark"] .text-green-700,
[data-theme="dark"] .text-green-800 {
    color: var(--accent-green) !important;
}

[data-theme="dark"] .text-amber-600,
[data-theme="dark"] .text-amber-700,
[data-theme="dark"] .text-amber-800,
[data-theme="dark"] .text-yellow-600,
[data-theme="dark"] .text-yellow-700,
[data-theme="dark"] .text-yellow-800 {
    color: var(--accent-amber) !important;
}

[data-theme="dark"] .text-red-600,
[data-theme="dark"] .text-red-700,
[data-theme="dark"] .text-red-800 {
    color: var(--accent-red) !important;
}

[data-theme="dark"] .text-purple-600,
[data-theme="dark"] .text-purple-700,
[data-theme="dark"] .text-purple-800 {
    color: var(--accent-purple) !important;
}

/* Border colors for colored borders */
[data-theme="dark"] .border-blue-500 {
    border-color: var(--accent-blue) !important;
}

[data-theme="dark"] .border-green-500 {
    border-color: var(--accent-green) !important;
}

[data-theme="dark"] .border-amber-500,
[data-theme="dark"] .border-yellow-500 {
    border-color: var(--accent-amber) !important;
}

[data-theme="dark"] .border-red-500 {
    border-color: var(--accent-red) !important;
}

[data-theme="dark"] .border-purple-500 {
    border-color: var(--accent-purple) !important;
}

/* CodeMirror dark theme support */
[data-theme="dark"] .CodeMirror {
    background-color: var(--bg-secondary) !important;
    color: var(--text-primary) !important;
    border-color: var(--border-primary) !important;
}

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

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

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

[data-theme="dark"] .CodeMirror-selected {
    background-color: rgba(96, 165, 250, 0.3) !important;
}

/* ================================== */
/* Select2 Dark Mode Styles           */
/* ================================== */

/* Main Select2 container */
[data-theme="dark"] .select2-container--default .select2-selection--single,
[data-theme="dark"] .select2-container--default .select2-selection--multiple {
    background-color: var(--input-bg) !important;
    border-color: var(--input-border) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .select2-container--default .select2-selection--single .select2-selection__rendered {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .select2-container--default .select2-selection--single .select2-selection__placeholder {
    color: var(--text-muted) !important;
}

[data-theme="dark"] .select2-container--default .select2-selection--single .select2-selection__arrow b {
    border-color: var(--text-tertiary) transparent transparent transparent !important;
}

[data-theme="dark"] .select2-container--default.select2-container--open .select2-selection--single .select2-selection__arrow b {
    border-color: transparent transparent var(--text-tertiary) transparent !important;
}

/* Dropdown */
[data-theme="dark"] .select2-dropdown {
    background-color: var(--bg-secondary) !important;
    border-color: var(--border-primary) !important;
    box-shadow: var(--shadow-lg) !important;
}

/* Search box inside dropdown */
[data-theme="dark"] .select2-search--dropdown .select2-search__field {
    background-color: var(--input-bg) !important;
    border-color: var(--input-border) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .select2-search--dropdown .select2-search__field:focus {
    border-color: var(--input-focus) !important;
    outline: none !important;
}

/* Results/Options */
[data-theme="dark"] .select2-results__option {
    background-color: var(--bg-secondary) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .select2-container--default .select2-results__option--highlighted[aria-selected],
[data-theme="dark"] .select2-container--default .select2-results__option--highlighted {
    background-color: var(--accent-blue) !important;
    color: #ffffff !important;
}

[data-theme="dark"] .select2-container--default .select2-results__option[aria-selected=true] {
    background-color: var(--bg-tertiary) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .select2-container--default .select2-results__option--disabled {
    color: var(--text-muted) !important;
}

/* Multiple selection tags */
[data-theme="dark"] .select2-container--default .select2-selection--multiple .select2-selection__choice {
    background-color: var(--accent-blue) !important;
    border-color: var(--accent-blue) !important;
    color: #ffffff !important;
}

[data-theme="dark"] .select2-container--default .select2-selection--multiple .select2-selection__choice__remove {
    color: rgba(255, 255, 255, 0.7) !important;
    border-right-color: rgba(255, 255, 255, 0.3) !important;
}

[data-theme="dark"] .select2-container--default .select2-selection--multiple .select2-selection__choice__remove:hover {
    color: #ffffff !important;
    background-color: rgba(0, 0, 0, 0.2) !important;
}

/* Focus state */
[data-theme="dark"] .select2-container--default.select2-container--focus .select2-selection--single,
[data-theme="dark"] .select2-container--default.select2-container--focus .select2-selection--multiple,
[data-theme="dark"] .select2-container--default.select2-container--open .select2-selection--single,
[data-theme="dark"] .select2-container--default.select2-container--open .select2-selection--multiple {
    border-color: var(--input-focus) !important;
    box-shadow: 0 0 0 2px rgba(96, 165, 250, 0.3) !important;
}

/* Option groups */
[data-theme="dark"] .select2-results__group {
    color: var(--text-tertiary) !important;
    background-color: var(--bg-tertiary) !important;
}

/* Clear button */
[data-theme="dark"] .select2-container--default .select2-selection__clear {
    color: var(--text-tertiary) !important;
}

[data-theme="dark"] .select2-container--default .select2-selection__clear:hover {
    color: var(--accent-red) !important;
}

/* Loading indicator */
[data-theme="dark"] .select2-container--default .select2-results__option--load-more,
[data-theme="dark"] .select2-container--default .select2-results__option--loading {
    color: var(--text-muted) !important;
}

/* No results message */
[data-theme="dark"] .select2-results__message {
    color: var(--text-muted) !important;
}