/* ===================================================================
   Theme CSS Variables - Light & Dark Mode Support
   ================================================================ */

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

    /* Text Colors */
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-muted: #999999;
    --text-disabled: #adb5bd;

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

    /* Component Backgrounds */
    --card-bg: #ffffff;
    --card-border: #dee2e6;
    --modal-bg: #ffffff;
    --modal-header-bg: #f8f9fa;
    --dropdown-bg: #ffffff;
    --dropdown-hover-bg: #f8f9fa;
    --table-bg: #ffffff;
    --table-stripe-bg: #f8f9fa;
    --table-hover-bg: #f1f3f5;
    --input-bg: #ffffff;
    --input-border: #ced4da;
    --input-focus-border: #86b7fe;

    /* Sidebar/Navigation */
    --sidebar-bg: #ffffff;
    --sidebar-border: #dee2e6;
    --nav-link-color: #212529;
    --nav-link-hover-bg: #f8f9fa;
    --nav-link-active-bg: #e9ecef;

    /* Shadows */
    --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);

    /* Bootstrap Variable Overrides */
    --bs-body-bg: #ffffff;
    --bs-body-color: #212529;
    --bs-border-color: #dee2e6;
    --bs-emphasis-color: #000000;
    --bs-secondary-bg: #f8f9fa;
    --bs-tertiary-bg: #f8f9fa;
}

/* Dark Theme */
[data-theme="dark"] {
    /* Background Colors */
    --bg-primary: #0e1218;
    --bg-secondary: #151b23;
    --bg-tertiary: #1d2430;
    --bg-hover: #232b38;

    /* Text Colors */
    --text-primary: #e6edf5;
    --text-secondary: #b9c4d3;
    --text-muted: #94a3b8;
    --text-disabled: #64748b;

    /* Border Colors */
    --border-color: #2a3342;
    --border-color-light: #212a36;
    --border-color-dark: #3a4658;

    /* Component Backgrounds */
    --card-bg: #121821;
    --card-border: #2a3342;
    --modal-bg: #121821;
    --modal-header-bg: #151b23;
    --dropdown-bg: #121821;
    --dropdown-hover-bg: #1d2430;
    --table-bg: #121821;
    --table-stripe-bg: #151b23;
    --table-hover-bg: #1d2430;
    --input-bg: #0f141d;
    --input-border: #2a3445;
    --input-focus-border: #4fd1c5;

    /* Sidebar/Navigation */
    --sidebar-bg: #111722;
    --sidebar-border: #2a3342;
    --nav-link-color: #e6edf5;
    --nav-link-hover-bg: #1d2430;
    --nav-link-active-bg: #2a3342;

    /* Shadows */
    --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);

    /* Bootstrap Variable Overrides */
    --bs-body-bg: #0e1218;
    --bs-body-color: #e6edf5;
    --bs-border-color: #2a3342;
    --bs-emphasis-color: #ffffff;
    --bs-secondary-bg: #151b23;
    --bs-tertiary-bg: #1d2430;
}

/* ===================================================================
   Global Element Styles
   ================================================================ */

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

/* ===================================================================
   Bootstrap Component Overrides
   ================================================================ */

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

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

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

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

.modal-header {
    background-color: var(--modal-header-bg);
    border-bottom-color: var(--border-color);
}

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

[data-theme="dark"] .modal-header .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

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

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

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

.dropdown-divider {
    border-top-color: var(--border-color);
}

/* Tables */
.table {
    --bs-table-bg: var(--table-bg);
    --bs-table-color: var(--text-primary);
    --bs-table-border-color: var(--border-color);
    --bs-table-striped-bg: var(--table-stripe-bg);
    --bs-table-hover-bg: var(--table-hover-bg);
}

.table-bordered {
    border-color: var(--border-color);
}

.table-bordered th,
.table-bordered td {
    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(--text-muted);
}

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

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

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

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

/* Checkboxes and Radios */
.form-check-input {
    background-color: var(--input-bg);
    border-color: var(--input-border);
}

.form-check-input:checked {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

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

/* Accordions */
.accordion-item {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.accordion-item + .accordion-item {
    margin-top: 0.75rem;
}

.accordion-button {
    background: linear-gradient(180deg, var(--bg-secondary), var(--bg-tertiary));
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: 0.01em;
    padding: 0.9rem 1.1rem;
}

.accordion-button:not(.collapsed) {
    background: linear-gradient(180deg, var(--bg-tertiary), var(--bg-secondary));
    color: var(--text-primary);
    box-shadow: inset 0 -1px 0 var(--border-color);
}

.accordion-button:focus {
    box-shadow: none;
}

.accordion-button::after {
    filter: var(--bs-accordion-btn-icon-filter, none);
}

[data-theme="dark"] .accordion-button::after {
    filter: invert(1) grayscale(100%) brightness(200%);
}

.accordion-body {
    background-color: var(--card-bg);
    color: var(--text-primary);
    border-top: 1px solid var(--border-color);
    padding: 1rem 1.1rem;
}

[data-theme="dark"] .accordion-item {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .accordion-button {
    background: linear-gradient(180deg, var(--bg-secondary), var(--bg-tertiary));
}

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

/* 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(--bg-hover);
}

/* Badges */
.badge {
    /* Badges keep their contextual colors */
}

/* Navs and Tabs */
.nav-link {
    color: var(--nav-link-color);
}

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

.nav-tabs .nav-link {
    background-color: transparent;
    border-color: var(--border-color);
}

.nav-tabs .nav-link.active {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: var(--text-primary);
}

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

.page-link:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.page-item.active .page-link {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

.page-item.disabled .page-link {
    background-color: var(--bg-tertiary);
    color: var(--text-disabled);
}

/* Breadcrumbs */
.breadcrumb {
    background-color: var(--bg-secondary);
}

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

/* Popovers & Tooltips */
.popover {
    background-color: var(--card-bg);
    border-color: var(--border-color);
}

.popover-header {
    background-color: var(--bg-secondary);
    border-bottom-color: var(--border-color);
}

.popover-body {
    color: var(--text-primary);
}

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

/* Progress Bars */
.progress {
    background-color: var(--bg-tertiary);
}

/* Close buttons */
[data-theme="dark"] .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

/* HR dividers */
hr {
    border-color: var(--border-color);
    opacity: 1;
}

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

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

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

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

/* ===================================================================
   Custom Component Styles
   ================================================================ */

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

.sidebar .nav-link {
    color: var(--nav-link-color);
}

.sidebar .nav-link:hover {
    background-color: var(--nav-link-hover-bg);
}

.sidebar .nav-link.active {
    background-color: var(--nav-link-active-bg);
}

/* ===================================================================
   Smooth Transitions
   ================================================================ */

body,
.card,
.modal-content,
.dropdown-menu,
.form-control,
.form-select,
.btn,
.nav-link {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* Respect user's reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
}