/* ========================================
   Theme System - Light and Dark Mode
   ======================================== */

/* Light Theme (Default) */
:root {
    /* Background colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --bg-hover: #f1f3f5;

    /* Text colors */
    --text-primary: #212529;      /* Contrast: 16:1 - WCAG AAA ✓ */
    --text-secondary: #495057;    /* Contrast: 8.5:1 - WCAG AAA ✓ (was #6c757d at 4.6:1) */
    --text-muted: #6c757d;        /* Contrast: 4.6:1 - WCAG AA ✓ (was #adb5bd at 2.8:1 ✗) */
    --text-inverse: #ffffff;

    /* Border colors */
    --border-color: #dee2e6;
    --border-light: #e9ecef;
    --border-dark: #ced4da;

    /* Component backgrounds */
    --card-bg: #ffffff;
    --modal-bg: #ffffff;
    --sidebar-bg: #f8f9fa;
    --header-bg: #ffffff;
    --footer-bg: #f8f9fa;

    /* Input colors */
    --input-bg: #ffffff;
    --input-border: #ced4da;
    --input-focus-border: #86b7fe;
    --input-placeholder: #6c757d;  /* Contrast: 4.6:1 - WCAG AA ✓ */

    /* Button colors */
    --btn-secondary-bg: #6c757d;
    --btn-secondary-hover: #5c636a;

    /* Brand colors */
    --primary-color: #0d6efd;

    /* Graph/canvas */
    --canvas-bg: #ffffff;
    --grid-color: #e9ecef;

    /* Shadow */
    --shadow-sm: 0 .125rem .25rem rgba(0,0,0,.075);
    --shadow: 0 .5rem 1rem rgba(0,0,0,.15);
    --shadow-lg: 0 1rem 3rem rgba(0,0,0,.175);

    /* Code/pre */
    --code-bg: #f8f9fa;
    --code-border: #dee2e6;

    /* List items */
    --list-hover-bg: #f8f9fa;
    --list-active-bg: #e7f1ff;

    /* Scrollbar */
    --scrollbar-track: #f1f1f1;
    --scrollbar-thumb: #c1c1c1;
    --scrollbar-thumb-hover: #a8a8a8;

    /* Concept/Graph Colors */
    --concept-default: #4A90E2;        /* Blue - default concept color */
    --concept-secondary: #6c757d;      /* Gray - fallback color */
    --concept-entity: #4A90E2;         /* Blue */
    --concept-process: #E67E22;        /* Orange */
    --concept-quality: #6BCF7F;        /* Green */
    --concept-role: #9B59B6;           /* Purple */
    --concept-function: #E74C3C;       /* Red */
    --concept-information: #3498DB;    /* Light Blue */
    --concept-event: #F39C12;          /* Amber */
    --concept-related: #1ABC9C;        /* Teal */
    --concept-attribute: #F4A261;      /* Peach */

    /* Code/Pre Colors */
    --code-bg-block: #f8f9fa;          /* Light gray for code blocks */
    --code-text: #212529;              /* Dark text */

    /* Border/Divider Colors */
    --divider-light: #dee2e6;          /* Light border */
    --divider-medium: #ced4da;         /* Medium border */

    /* Accent Colors */
    --accent-purple: #6f42c1;          /* Purple accent for headers */
    --accent-blue: #0d6efd;            /* Blue accent */
}

/* Dark Theme - Using Bootstrap 5.3+ data-bs-theme attribute */
[data-bs-theme="dark"] {
    /* Background colors */
    --bg-primary: #1a1d23;
    --bg-secondary: #2d3139;
    --bg-tertiary: #383d47;
    --bg-hover: #3a3f4a;

    /* Text colors */
    --text-primary: #e8eaed;
    --text-secondary: #b8bcc4;
    --text-muted: #868b94;
    --text-inverse: #1a1d23;

    /* Border colors */
    --border-color: #3a3f4a;
    --border-light: #2d3139;
    --border-dark: #4a4f5a;

    /* Component backgrounds */
    --card-bg: #2d3139;
    --modal-bg: #2d3139;
    --sidebar-bg: #1e2127;
    --header-bg: #1e2127;
    --footer-bg: #1e2127;

    /* Input colors */
    --input-bg: #2d3139;
    --input-border: #3a3f4a;
    --input-focus-border: #4a90e2;
    --input-placeholder: #868b94;

    /* Button colors */
    --btn-secondary-bg: #4a4f5a;
    --btn-secondary-hover: #5a5f6a;

    /* Brand colors */
    --primary-color: #4a90e2;

    /* Graph/canvas */
    --canvas-bg: #252931;
    --grid-color: #3a3f4a;

    /* Shadow */
    --shadow-sm: 0 .125rem .25rem rgba(0,0,0,.3);
    --shadow: 0 .5rem 1rem rgba(0,0,0,.4);
    --shadow-lg: 0 1rem 3rem rgba(0,0,0,.5);

    /* Code/pre */
    --code-bg: #1e2127;
    --code-border: #3a3f4a;

    /* List items */
    --list-hover-bg: #2d3139;
    --list-active-bg: #1e3a5f;

    /* Scrollbar */
    --scrollbar-track: #2d3139;
    --scrollbar-thumb: #4a4f5a;
    --scrollbar-thumb-hover: #5a5f6a;

    /* Concept/Graph Colors - Brighter for dark mode visibility */
    --concept-default: #5FA3F0;        /* Brighter blue */
    --concept-secondary: #8a8f98;      /* Lighter gray */
    --concept-entity: #5FA3F0;         /* Brighter blue */
    --concept-process: #F39746;        /* Brighter orange */
    --concept-quality: #7FDB95;        /* Brighter green */
    --concept-role: #B077D6;           /* Brighter purple */
    --concept-function: #F46B5E;       /* Brighter red */
    --concept-information: #4AA9E8;    /* Brighter light blue */
    --concept-event: #FFB038;          /* Brighter amber */
    --concept-related: #2DCFB3;        /* Brighter teal */
    --concept-attribute: #FFB88C;      /* Brighter peach */

    /* Code/Pre Colors - Dark mode appropriate */
    --code-bg-block: #1e2127;          /* Dark background for code */
    --code-text: #e8eaed;              /* Light text */

    /* Border/Divider Colors - Visible in dark mode */
    --divider-light: #3a3f4a;          /* Darker border */
    --divider-medium: #4a4f5a;         /* Medium-dark border */

    /* Accent Colors - Adjusted for dark mode */
    --accent-purple: #8B5FD6;          /* Lighter purple */
    --accent-blue: #4A90E2;            /* Lighter blue */
}

/* ========================================
   Apply Theme Variables to Components
   ======================================== */

/* Body and main containers */
body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Cards */
.card {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.card-header,
.card-footer {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
}

/* Modals */
.modal-content {
    background-color: var(--modal-bg);
    color: var(--text-primary);
}

.modal-header,
.modal-footer {
    border-color: var(--border-color);
}

/* Forms */
.form-control,
.form-select {
    background-color: var(--input-bg);
    border-color: var(--input-border);
    color: var(--text-primary);
}

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

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

/* List groups */
.list-group-item {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: var(--text-primary);
}

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

.list-group-item.active {
    background-color: var(--list-active-bg);
    border-color: var(--border-color);
}

/* Fix for list-group-item-action hover in dark mode */
[data-bs-theme="dark"] .list-group-item-action:hover,
[data-bs-theme="dark"] .list-group-item-action:focus {
    background-color: var(--list-hover-bg);
    color: var(--text-primary) !important;
}

[data-bs-theme="dark"] .list-group-item-action:hover h6,
[data-bs-theme="dark"] .list-group-item-action:hover p,
[data-bs-theme="dark"] .list-group-item-action:hover span,
[data-bs-theme="dark"] .list-group-item-action:hover em,
[data-bs-theme="dark"] .list-group-item-action:hover div {
    color: inherit !important;
}

[data-bs-theme="dark"] .list-group-item-action:hover .text-muted {
    color: var(--text-secondary) !important;
}

[data-bs-theme="dark"] .list-group-item-action:hover .badge {
    opacity: 0.9;
}

/* Dropdowns */
.dropdown-menu {
    background-color: var(--card-bg);
    border-color: var(--border-color);
}

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

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

/* Navigation */
.nav-link {
    color: var(--text-secondary);
}

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

.nav-link.active {
    color: var(--text-primary);
}

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

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

.btn-outline-secondary {
    color: var(--text-primary);
    border-color: #6c757d; /* Dark gray border for light mode */
}

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

/* Dark mode: Light gray border for better visibility */
[data-bs-theme="dark"] .btn-outline-secondary {
    border-color: #9ca3af; /* Light gray border for dark mode */
}

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

/* Improve contrast for other outline button types */
.btn-outline-info {
    border-color: #0dcaf0; /* Solid cyan border for light mode */
}

[data-bs-theme="dark"] .btn-outline-info {
    border-color: #3dd5f3; /* Brighter cyan for dark mode */
}

.btn-outline-success {
    border-color: #198754; /* Solid green border for light mode */
}

[data-bs-theme="dark"] .btn-outline-success {
    border-color: #20c997; /* Brighter green for dark mode */
}

.btn-outline-warning {
    border-color: #ffc107; /* Solid yellow/orange border for light mode */
}

[data-bs-theme="dark"] .btn-outline-warning {
    border-color: #ffca2c; /* Brighter yellow for dark mode */
}

/* Tables */
.table {
    color: var(--text-primary);
    border-color: var(--border-color);
}

.table-striped > tbody > tr:nth-of-type(odd) > * {
    --bs-table-bg-type: var(--bg-secondary);
}

.table-hover > tbody > tr:hover > * {
    --bs-table-bg-state: var(--bg-hover);
}

/* Alerts */
.alert {
    border-color: var(--border-color);
}

/* Code blocks */
pre,
code {
    background-color: var(--code-bg);
    border-color: var(--code-border);
    color: var(--text-primary);
}

/* Borders */
.border,
.border-top,
.border-bottom,
.border-start,
.border-end {
    border-color: var(--border-color) !important;
}

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

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

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

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

/* Custom scrollbar for dark mode */
[data-bs-theme="dark"] ::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

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

[data-bs-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 6px;
}

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

/* Graph visualization adjustments */
[data-bs-theme="dark"] #cy {
    background-color: var(--canvas-bg);
}

/* Tooltips */
.tooltip-inner {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Badges */
.badge {
    color: #fff;
}

/* Sidebar specific */
.sidebar {
    background-color: var(--sidebar-bg);
    border-color: var(--border-color);
}

/* Header specific */
header,
.navbar {
    background-color: var(--header-bg);
    border-color: var(--border-color);
}

/* Footer specific */
footer {
    background-color: var(--footer-bg);
    border-color: var(--border-color);
}

/* Smooth transitions for theme changes */
* {
    transition: background-color 0.3s ease,
                color 0.3s ease,
                border-color 0.3s ease;
}

/* Disable transitions for certain elements to avoid flashing */
.btn,
.form-control,
.form-select,
.modal,
.dropdown-menu {
    transition: none;
}