/*
 * Professional Dark/Light Theme System
 * Uses CSS Variables for easy theming
 */

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

    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;

    --border-color: #dee2e6;
    --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --shadow-md: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);

    /* Accent Colors (Stay same in both modes) */
    --accent-primary: #6366f1;
    --accent-success: #22c55e;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
    --accent-info: #3b82f6;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-warm: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);

    /* Theme toggle icon */
    --theme-icon: '☀️';
}

/* Dark Mode */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    --bg-hover: #334155;

    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;

    --border-color: #334155;
    --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.3);
    --shadow-md: 0 0.5rem 1rem rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.5);

    --theme-icon: '🌙';
}

/* Apply theme colors to body */
body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Cards and Containers */
.card {
    background-color: var(--bg-card) !important;
    border-color: var(--border-color) !important;
    color: var(--text-primary) !important;
    box-shadow: var(--shadow-sm) !important;
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-md) !important;
}

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

/* Navigation */
.navbar {
    background-color: var(--bg-card) !important;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.nav-link {
    color: var(--text-secondary) !important;
    transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-primary) !important;
}

/* Buttons */
.btn-outline-primary,
.btn-outline-secondary,
.btn-outline-success,
.btn-outline-warning,
.btn-outline-danger,
.btn-outline-info {
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-outline-primary:hover {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

/* Forms */
.form-control,
.form-select {
    background-color: var(--bg-secondary) !important;
    border-color: var(--border-color) !important;
    color: var(--text-primary) !important;
    transition: all 0.2s ease;
}

.form-control:focus,
.form-select:focus {
    background-color: var(--bg-primary) !important;
    border-color: var(--accent-primary) !important;
    box-shadow: 0 0 0 0.25rem rgba(99, 102, 241, 0.25) !important;
    color: var(--text-primary) !important;
}

.form-control::placeholder {
    color: var(--text-muted) !important;
}

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

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

.table > :not(caption) > * > * {
    background-color: var(--bg-card) !important;
    border-color: var(--border-color) !important;
    color: var(--text-primary) !important;
}

.table-hover > tbody > tr:hover > * {
    background-color: var(--bg-hover) !important;
}

.table thead th {
    border-color: var(--border-color) !important;
    color: var(--text-secondary) !important;
}

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

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

/* Badges */
.badge {
    transition: all 0.2s ease;
}

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

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

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

/* Dropdowns */
.dropdown-menu {
    background-color: var(--bg-card) !important;
    border-color: var(--border-color) !important;
    box-shadow: var(--shadow-md);
}

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

.dropdown-item:hover {
    background-color: var(--bg-hover) !important;
}

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

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

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

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

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

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

/* Theme Toggle Button Styles */
.theme-toggle {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transform: translateY(-2px) scale(1.05);
}

.theme-toggle:active {
    transform: translateY(0) scale(0.95);
}

.theme-toggle-icon {
    font-size: 1.4rem;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.3));
}

.theme-toggle:hover .theme-toggle-icon {
    transform: rotate(180deg) scale(1.1);
}

/* Enhanced visibility in navbar */
.navbar .theme-toggle {
    margin-left: 0.5rem;
}

/* Dark mode specific styling */
[data-theme="dark"] .theme-toggle {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.25);
}

[data-theme="dark"] .theme-toggle:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
}

/* Smooth transitions for theme changes */
* {
    transition-property: background-color, border-color, color, box-shadow;
    transition-duration: 0.3s;
    transition-timing-function: ease;
}

/* Prevent transition on page load */
.preload * {
    transition: none !important;
}

/* Admin Panel Specific Styles */
.admin-sidebar {
    background-color: var(--bg-card) !important;
    border-color: var(--border-color) !important;
}

.admin-sidebar .nav-item .nav-link {
    color: var(--text-secondary) !important;
    transition: all 0.2s ease;
}

.admin-sidebar .nav-item .nav-link:hover,
.admin-sidebar .nav-item .nav-link.active {
    background-color: var(--bg-hover) !important;
    color: var(--accent-primary) !important;
}

/* Scrollbar Styling for Dark Mode */
[data-theme="dark"] ::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

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

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 5px;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: #475569;
}

/* Special Elements */
.hero-section,
.feature-card,
.project-card {
    background-color: var(--bg-card) !important;
    border-color: var(--border-color) !important;
    box-shadow: var(--shadow-sm);
}

/* Links */
a {
    color: var(--accent-primary);
    transition: color 0.2s ease;
}

a:hover {
    color: var(--accent-info);
}

/* Selection */
::selection {
    background-color: var(--accent-primary);
    color: white;
}

/* Focus Visible */
:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

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

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

.popover-header {
    background-color: var(--bg-secondary) !important;
    border-color: var(--border-color) !important;
    color: var(--text-primary) !important;
}

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

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

/* Spinners and Loading States */
.spinner-border,
.spinner-grow {
    color: var(--accent-primary) !important;
}

/* Dark Mode Image Filter (Optional - subtle effect) */
[data-theme="dark"] img:not(.no-filter) {
    filter: brightness(0.9);
    transition: filter 0.3s ease;
}

[data-theme="dark"] img:not(.no-filter):hover {
    filter: brightness(1);
}