/* ============================================
   mPromptLab - Minimalistic UI Design System

   Color Palette:
   - Black: #2A1910
   - Pewter: #D9DDE0
   - Slate: #7E8890
   - Desert Sun: #663C10
   ============================================ */

:root {
    /* Fixed Values */
    --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --font-family-mono: 'SF Mono', 'Monaco', 'Consolas', 'Courier New', monospace;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* Color Palette */
    --color-black: #2A1910;
    --color-pewter: #D9DDE0;
    --color-slate: #7E8890;
    --color-desert-sun: #663C10;

    /* Semantic Colors */
    --color-primary: #663C10;
    --color-primary-light: #8B5217;
    --color-primary-lighter: #B8896A;
    --color-primary-rgb: 102, 60, 16;

    --color-text-primary: #2A1910;
    --color-text-secondary: rgba(42, 25, 16, 0.7);
    --color-text-muted: rgba(42, 25, 16, 0.5);
    --color-text-inverse: #FFFFFF;

    /* Background Colors */
    --color-bg-main: #F5F5F5;
    --color-bg-surface: #FFFFFF;
    --color-bg-card: rgba(255, 255, 255, 0.85);
    --color-bg-card-hover: rgba(255, 255, 255, 0.95);
    --color-bg-overlay: rgba(217, 221, 224, 0.3);
    --color-bg-elevated: rgba(255, 255, 255, 0.95);

    /* Border & Shadows */
    --color-border: rgba(126, 136, 144, 0.2);
    --color-border-light: rgba(126, 136, 144, 0.1);
    --color-border-focus: rgba(102, 60, 16, 0.4);
    --shadow-sm: 0 2px 8px rgba(42, 25, 16, 0.08);
    --shadow-md: 0 4px 16px rgba(42, 25, 16, 0.12);
    --shadow-lg: 0 8px 32px rgba(42, 25, 16, 0.16);

    /* Status Colors */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #7E8890;
}

/* ============================================
   Base Styles
   ============================================ */

html,
body {
    font-family: var(--font-family-base);
    font-size: 15px;
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-main);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    margin: 0;
    padding: 0;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-light);
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 2rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.5rem;
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.25rem;
}

h4 {
    font-size: 1.125rem;
}

h1:focus {
    outline: none;
}

/* ============================================
   Layout Structure
   ============================================ */

.page-wrapper {
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.top-navigation {
    width: 100%;
    z-index: 1000;
    position: sticky;
    top: 0;
    background: rgba(217, 221, 224, 0.7);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 2px 16px rgba(42, 25, 16, 0.06);
}

.main-content {
    flex: 1;
    background: linear-gradient(135deg, #F5F5F5 0%, rgba(217, 221, 224, 0.3) 100%);
    padding: 0;
}

.content-area {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl);
}

.content {
    padding-top: var(--spacing-sm);
}

/* ============================================
   Navigation
   ============================================ */

.navbar {
    padding: var(--spacing-md) 0;
    min-height: auto;
}

.navbar-dark.bg-gradient {
    background: linear-gradient(135deg,
        rgba(42, 25, 16, 0.95) 0%,
        rgba(102, 60, 16, 0.9) 100%) !important;
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-size: 1.25rem;
    letter-spacing: -0.02em;
    color: white !important;
    font-weight: 700;
    padding: var(--spacing-xs) 0;
    transition: transform var(--transition-fast);
}

.navbar-brand:hover {
    color: var(--color-baby-blue, #DCF5FF) !important;
    transform: translateX(2px);
}

.navbar-nav .nav-item {
    margin: 0 var(--spacing-xs);
}

.nav-link {
    font-weight: 500;
    transition: all var(--transition-base);
    color: rgba(255, 255, 255, 0.9) !important;
    border-radius: var(--radius-md);
    padding: 0.5rem 1rem !important;
    font-size: 0.9375rem;
    position: relative;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-baby-blue, #DCF5FF);
    transform: translateX(-50%);
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link:focus {
    background-color: rgba(255, 255, 255, 0.15);
    color: white !important;
    transform: translateY(-1px);
}

.nav-link:hover::before {
    width: 60%;
}

.nav-link.active {
    background-color: rgba(255, 255, 255, 0.2);
    color: white !important;
    font-weight: 600;
}

.nav-link.active::before {
    width: 80%;
}

/* Navigation Tabs Override */
.nav-tabs {
    border-bottom: 2px solid var(--color-border);
}

.nav-tabs .nav-link {
    color: var(--color-text-secondary) !important;
    background-color: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    border-radius: 0;
    font-weight: 500;
    padding: var(--spacing-md) var(--spacing-lg) !important;
    margin-bottom: -2px;
    transform: none;
    transition: all var(--transition-fast);
}

.nav-tabs .nav-link::before {
    display: none;
}

.nav-tabs .nav-link:hover,
.nav-tabs .nav-link:focus {
    color: var(--color-primary) !important;
    background-color: rgba(146, 184, 255, 0.08);
    border-bottom-color: var(--color-primary-light);
    transform: none;
}

.nav-tabs .nav-link.active {
    color: var(--color-primary) !important;
    background-color: transparent;
    border-bottom-color: var(--color-primary);
    font-weight: 600;
    transform: none;
}

/* Navigation Pills Override */
.nav-pills .nav-link {
    color: var(--color-text-primary) !important;
    background-color: transparent !important;
    border-radius: var(--radius-md) !important;
    font-weight: 500 !important;
    padding: var(--spacing-sm) var(--spacing-md) !important;
    margin-right: var(--spacing-xs);
    transform: none !important;
    transition: all var(--transition-fast) !important;
    border: 1px solid transparent !important;
}

.nav-pills .nav-link::before {
    display: none;
}

.nav-pills .nav-link:hover,
.nav-pills .nav-link:focus {
    color: var(--color-primary) !important;
    background-color: rgba(146, 184, 255, 0.15) !important;
    transform: none !important;
}

.nav-pills .nav-link.active,
.nav-pills .nav-link.active:hover,
.nav-pills .nav-link.active:focus {
    color: white !important;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%) !important;
    font-weight: 600 !important;
    box-shadow: var(--shadow-sm);
    transform: none !important;
}

.navbar-toggler {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.875rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-sm);
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.9%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.container-fluid {
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

/* ============================================
   Cards
   ============================================ */

.card {
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.card:hover {
    background: var(--color-bg-card-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-header {
    background: rgba(220, 245, 255, 0.5);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) var(--spacing-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    background: rgba(220, 245, 255, 0.3);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* ============================================
   Forms
   ============================================ */

.form-label {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
    font-size: 0.9375rem;
}

.form-control,
.form-select {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0.625rem 1rem;
    font-size: 0.9375rem;
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

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

.form-control:focus,
.form-select:focus {
    background: rgba(255, 255, 255, 1);
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 4px rgba(25, 140, 193, 0.1);
    outline: none;
}

.form-control-lg {
    padding: 0.875rem 1.25rem;
    font-size: 1rem;
    border-radius: var(--radius-lg);
}

.input-group {
    margin-bottom: var(--spacing-md);
}

.input-group-text {
    background: rgba(220, 245, 255, 0.5);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
}

.input-group:focus-within .input-group-text {
    border-color: var(--color-border-focus);
    background: rgba(220, 245, 255, 0.7);
}

.input-group:focus-within .form-control {
    border-color: var(--color-border-focus);
}

.form-floating > .form-control::placeholder {
    color: var(--color-text-muted);
}

.form-floating > .form-control:focus::placeholder {
    text-align: start;
}

/* Form Validation */
.valid.modified:not([type=checkbox]) {
    border-color: #28a745;
    box-shadow: 0 0 0 3px rgba(40, 167, 69, 0.1);
}

.invalid {
    border-color: #dc3545;
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
}

.validation-message {
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    font-weight: 600;
    border-radius: var(--radius-md);
    padding: 0.625rem 1.25rem;
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
    border: none;
    letter-spacing: 0.01em;
}

.btn-sm {
    padding: 0.375rem 0.875rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1.0625rem;
    border-radius: var(--radius-lg);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #1579a8 0%, #7ba3e6 100%);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    color: white;
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:focus,
.btn:focus,
.btn:active:focus,
.btn-link.nav-link:focus,
.form-control:focus,
.form-check-input:focus {
    box-shadow: 0 0 0 4px rgba(25, 140, 193, 0.2);
}

.btn-secondary {
    background: rgba(146, 184, 255, 0.15);
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: rgba(146, 184, 255, 0.25);
    color: var(--color-primary);
    border-color: var(--color-primary-light);
    transform: translateY(-2px);
}

.btn-outline-light {
    border-color: rgba(255, 255, 255, 0.3);
    color: white;
}

.btn-outline-light:hover {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.5);
    color: white;
}

.btn-light {
    background: rgba(255, 255, 255, 0.8);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-light:hover {
    background: rgba(255, 255, 255, 1);
    border-color: var(--color-primary-light);
    color: var(--color-primary);
}

.btn-link {
    color: var(--color-primary);
    text-decoration: none;
}

.btn-link:hover {
    color: var(--color-primary-light);
    text-decoration: underline;
}

/* ============================================
   Alerts & Messages
   ============================================ */

.alert {
    border: none;
    border-radius: var(--radius-lg);
    border-left: 4px solid;
    padding: var(--spacing-md) var(--spacing-lg);
    backdrop-filter: blur(10px);
}

.alert-primary {
    background: rgba(146, 184, 255, 0.15);
    border-left-color: var(--color-primary);
    color: var(--color-text-primary);
}

.alert-success {
    background: rgba(40, 167, 69, 0.1);
    border-left-color: #28a745;
    color: var(--color-text-primary);
}

.alert-warning {
    background: rgba(255, 193, 7, 0.1);
    border-left-color: #ffc107;
    color: var(--color-text-primary);
}

.alert-danger {
    background: rgba(220, 53, 69, 0.1);
    border-left-color: #dc3545;
    color: var(--color-text-primary);
}

.alert-info {
    background: rgba(25, 140, 193, 0.1);
    border-left-color: var(--color-primary);
    color: var(--color-text-primary);
}

/* ============================================
   Badges
   ============================================ */

.badge {
    font-weight: 600;
    font-size: 0.8125rem;
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-sm);
    letter-spacing: 0.02em;
}

.badge.rounded-pill {
    padding: 0.375rem 1rem;
    border-radius: 50px;
}

.tag-badge {
    background: rgba(146, 184, 255, 0.2) !important;
    color: var(--color-primary) !important;
    border: 1px solid var(--color-border);
}

.status-badge-success {
    background: rgba(40, 167, 69, 0.15) !important;
    color: #1e7e34 !important;
}

.status-badge-failed {
    background: rgba(220, 53, 69, 0.15) !important;
    color: #c82333 !important;
}

.bg-primary-subtle {
    background: rgba(146, 184, 255, 0.2) !important;
}

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

.bg-warning-subtle {
    background: rgba(255, 193, 7, 0.15) !important;
}

.text-warning {
    color: #856404 !important;
}

/* ============================================
   Tables
   ============================================ */

.table {
    font-size: 0.9375rem;
    color: var(--color-text-primary);
}

.table th {
    font-weight: 600;
    border-top: none;
    padding: var(--spacing-md);
    background: rgba(220, 245, 255, 0.3);
    color: var(--color-text-primary);
}

.table td {
    padding: var(--spacing-md);
    vertical-align: middle;
    border-color: var(--color-border);
}

.table-hover tbody tr:hover {
    background: rgba(146, 184, 255, 0.08);
}

/* ============================================
   Dropdown
   ============================================ */

.dropdown-menu {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(16px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-sm);
}

.dropdown-item {
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    transition: all var(--transition-fast);
    color: var(--color-text-primary);
}

.dropdown-item:hover {
    background: rgba(146, 184, 255, 0.15);
    color: var(--color-primary);
    transform: translateX(4px);
}

.dropdown-item i {
    width: 20px;
    margin-right: var(--spacing-sm);
}

/* ============================================
   Pagination
   ============================================ */

.pagination {
    gap: var(--spacing-xs);
}

.page-link {
    border-radius: var(--radius-md) !important;
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    font-weight: 500;
    padding: 0.5rem 0.875rem;
    transition: all var(--transition-fast);
    background: var(--color-bg-card);
}

.page-link:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.page-item.active .page-link {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-color: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.page-item.disabled .page-link {
    background: rgba(220, 245, 255, 0.3);
    border-color: var(--color-border);
    color: var(--color-text-muted);
}

/* ============================================
   Breadcrumb
   ============================================ */

.breadcrumb {
    background-color: transparent;
    padding: var(--spacing-sm) 0;
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
}

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

.breadcrumb-item + .breadcrumb-item::before {
    color: var(--color-text-muted);
}

.breadcrumb-item.active {
    color: var(--color-text-primary);
    font-weight: 600;
}

/* ============================================
   Custom Components - Prompt Cards
   ============================================ */

.prompt-card,
.prompt-card-modern {
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.prompt-card::before,
.prompt-card-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.prompt-card:hover,
.prompt-card-modern:hover {
    background: var(--color-bg-card-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.prompt-card:hover::before,
.prompt-card-modern:hover::before {
    transform: scaleX(1);
}

.prompt-card .card-title,
.prompt-card-modern .card-title {
    color: var(--color-text-primary);
    font-size: 1.125rem;
    line-height: 1.4;
    font-weight: 600;
}

/* Category Card */
.category-card-modern {
    border-left: 4px solid var(--color-primary) !important;
}

.category-card-modern:hover {
    border-left-color: var(--color-primary-light) !important;
}

.category-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    box-shadow: var(--shadow-sm);
}

/* Template Preview */
.template-preview {
    font-family: var(--font-family-mono);
    font-size: 0.875rem;
    background: rgba(220, 245, 255, 0.3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    max-height: 200px;
    overflow-y: auto;
    color: var(--color-text-primary);
}

/* ============================================
   Diff Viewer
   ============================================ */

.diff-viewer {
    margin-bottom: var(--spacing-lg);
}

.diff-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-border);
}

.diff-container {
    font-family: var(--font-family-mono);
    font-size: 13px;
    line-height: 1.5;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: rgba(255, 255, 255, 0.9);
}

.diff-line {
    display: flex;
    padding: 0;
    margin: 0;
    font-family: inherit;
    white-space: pre;
}

.diff-line-number {
    display: inline-block;
    width: 45px;
    padding: 0 var(--spacing-sm);
    text-align: right;
    color: var(--color-text-muted);
    user-select: none;
    flex-shrink: 0;
}

.diff-line-prefix {
    display: inline-block;
    width: 20px;
    padding-left: var(--spacing-sm);
    user-select: none;
    flex-shrink: 0;
}

.diff-line-content {
    display: inline-block;
    flex: 1;
    padding: 0 var(--spacing-sm) 0 0;
    word-wrap: break-word;
    white-space: pre-wrap;
}

.diff-line-unchanged {
    background-color: transparent;
}

.diff-line-unchanged .diff-line-number {
    background: rgba(220, 245, 255, 0.2);
}

.diff-line-inserted {
    background: rgba(40, 167, 69, 0.08);
}

.diff-line-inserted .diff-line-number {
    background: rgba(40, 167, 69, 0.15);
    color: #1e7e34;
}

.diff-line-inserted .diff-line-prefix {
    color: #1e7e34;
}

.diff-line-deleted {
    background: rgba(220, 53, 69, 0.08);
}

.diff-line-deleted .diff-line-number {
    background: rgba(220, 53, 69, 0.15);
    color: #c82333;
}

.diff-line-deleted .diff-line-prefix {
    color: #c82333;
}

.diff-line-modified {
    background: rgba(255, 193, 7, 0.08);
}

.diff-line-modified .diff-line-number {
    background: rgba(255, 193, 7, 0.15);
    color: #856404;
}

.diff-line-modified .diff-line-prefix {
    color: #856404;
}

.diff-line-imaginary {
    opacity: 0.4;
}

/* ============================================
   Loading States
   ============================================ */

.skeleton-card {
    pointer-events: none;
    user-select: none;
}

.skeleton {
    background: linear-gradient(90deg,
        rgba(220, 245, 255, 0.4) 25%,
        rgba(146, 184, 255, 0.2) 50%,
        rgba(220, 245, 255, 0.4) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-sm);
}

.skeleton-text {
    height: 20px;
    width: 70%;
}

.skeleton-text-small {
    height: 14px;
    width: 50%;
}

.skeleton-badge {
    height: 24px;
    width: 80px;
    border-radius: 50px;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ============================================
   Empty States
   ============================================ */

.empty-state {
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
}

.empty-state-icon {
    font-size: 4rem;
    color: var(--color-primary-light);
    margin-bottom: var(--spacing-md);
    opacity: 0.6;
}

.empty-state h4 {
    color: var(--color-text-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.empty-state p {
    color: var(--color-text-secondary);
    font-size: 1rem;
}

/* ============================================
   Error Boundaries
   ============================================ */

.blazor-error-boundary {
    background: linear-gradient(135deg, #dc3545 0%, #c82333 100%);
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 3.5rem;
    color: white;
    border-radius: var(--radius-md);
    position: relative;
}

.blazor-error-boundary::before {
    content: "⚠";
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    font-size: 2rem;
}

.blazor-error-boundary::after {
    content: "An error has occurred.";
}

.darker-border-checkbox.form-check-input {
    border-color: var(--color-border);
}

#blazor-error-ui {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    bottom: 0;
    box-shadow: 0 -4px 16px rgba(42, 25, 16, 0.1);
    display: none;
    left: 0;
    padding: var(--spacing-md) var(--spacing-lg);
    position: fixed;
    width: 100%;
    z-index: 1000;
    border-top: 3px solid var(--color-primary);
    color: var(--color-text-primary);
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-secondary);
}

/* ============================================
   Utility Classes
   ============================================ */

.card-hover {
    transition: all var(--transition-base);
}

.card-hover:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.compact-form .mb-3 {
    margin-bottom: var(--spacing-md) !important;
}

.compact-form .form-control,
.compact-form .form-select {
    padding: 0.5rem 0.875rem;
    font-size: 0.9375rem;
}

.edit-tab {
    color: var(--color-text-primary) !important;
}

.edit-tab:hover,
.edit-tab.active {
    color: var(--color-primary) !important;
    font-weight: 600;
}

.mb-4 {
    margin-bottom: var(--spacing-lg) !important;
}

.py-3 {
    padding-top: var(--spacing-md) !important;
    padding-bottom: var(--spacing-md) !important;
}

.content-area {
    max-width: none !important;
    margin: 0 !important;
    padding: var(--spacing-md) !important;
}

.test-results-container {
    min-height: 400px;
}

.test-results-container pre {
    font-size: 0.875rem;
    line-height: 1.5;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 991.98px) {
    .navbar-nav {
        padding-top: var(--spacing-md);
    }

    .navbar-nav .nav-link {
        padding: var(--spacing-md) var(--spacing-lg);
        margin: var(--spacing-xs) 0;
    }
}

@media (max-width: 768px) {
    :root {
        font-size: 14px;
    }

    .content-area {
        padding: var(--spacing-md);
    }

    .navbar-brand {
        font-size: 1.125rem;
    }

    .nav-link {
        font-size: 0.9375rem;
        padding: 0.5rem 0.875rem !important;
    }

    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.375rem;
    }

    .empty-state {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .empty-state-icon {
        font-size: 3rem;
    }

    .prompt-card .card-title,
    .prompt-card-modern .card-title {
        font-size: 1rem;
    }

    .category-icon {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }

    .pagination {
        font-size: 0.875rem;
    }

    .page-link {
        padding: 0.375rem 0.625rem;
    }

    .btn-lg {
        padding: 0.75rem 1.25rem;
        font-size: 1rem;
    }

    .diff-container {
        font-size: 12px;
    }

    .diff-line-number {
        width: 35px;
        padding: 0 var(--spacing-xs);
    }
}

@media (max-width: 640px) {
    .card-body {
        padding: var(--spacing-md);
    }

    .card-header,
    .card-footer {
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

/* ============================================
   Accessibility
   ============================================ */

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
.btn:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================
   Smooth Animations
   ============================================ */

* {
    transition-property: background-color, border-color, color, fill, stroke, opacity, box-shadow, transform;
    transition-duration: var(--transition-fast);
    transition-timing-function: ease;
}

button,
a,
input,
select,
textarea {
    transition-duration: var(--transition-fast);
}

.card,
.btn,
.nav-link {
    transition-duration: var(--transition-base);
}

/* ============================================
   Enhanced Toast Notifications
   ============================================ */

.mprompt-toast-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    pointer-events: none;
}

.mprompt-toast {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    min-width: 280px;
    max-width: 420px;
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px rgba(42, 25, 16, 0.12),
                0 2px 8px rgba(42, 25, 16, 0.08);
    pointer-events: auto;
    position: relative;
    overflow: hidden;
}

/* Toast Type Variants */
.mprompt-toast-success {
    border-left: 4px solid var(--color-success);
}

.mprompt-toast-error {
    border-left: 4px solid var(--color-error);
}

.mprompt-toast-warning {
    border-left: 4px solid var(--color-warning);
}

.mprompt-toast-info {
    border-left: 4px solid var(--color-info);
}

/* Toast Icon */
.mprompt-toast-icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-size: 1.125rem;
}

.mprompt-toast-success .mprompt-toast-icon {
    background: rgba(16, 185, 129, 0.12);
    color: var(--color-success);
}

.mprompt-toast-error .mprompt-toast-icon {
    background: rgba(239, 68, 68, 0.12);
    color: var(--color-error);
}

.mprompt-toast-warning .mprompt-toast-icon {
    background: rgba(245, 158, 11, 0.12);
    color: var(--color-warning);
}

.mprompt-toast-info .mprompt-toast-icon {
    background: rgba(126, 136, 144, 0.12);
    color: var(--color-info);
}

/* Animated Icon for Success */
.mprompt-toast-success .mprompt-toast-icon i {
    animation: toast-checkmark 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes toast-checkmark {
    0% {
        transform: scale(0) rotate(-45deg);
        opacity: 0;
    }
    50% {
        transform: scale(1.2) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: scale(1) rotate(0deg);
        opacity: 1;
    }
}

/* Toast Content */
.mprompt-toast-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    min-width: 0;
}

.mprompt-toast-message {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-primary);
    line-height: 1.5;
    word-wrap: break-word;
}

/* Close Button */
.mprompt-toast-close {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    padding: 0;
    font-size: 1.125rem;
}

.mprompt-toast-close:hover {
    background: rgba(42, 25, 16, 0.08);
    color: var(--color-text-primary);
    transform: rotate(90deg);
}

.mprompt-toast-close:active {
    transform: rotate(90deg) scale(0.9);
}

/* Entrance Animation */
.mprompt-toast-enter {
    animation: toast-slide-in 0.35s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes toast-slide-in {
    0% {
        transform: translateX(100%) scale(0.95);
        opacity: 0;
    }
    100% {
        transform: translateX(0) scale(1);
        opacity: 1;
    }
}

/* Progress Bar for Auto-Dismiss */
.mprompt-toast::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    height: 2px;
    width: 100%;
    background: linear-gradient(90deg,
        var(--color-success) 0%,
        var(--color-primary) 100%);
    transform-origin: left;
    animation: toast-progress 2s linear forwards;
    opacity: 0.3;
}

.mprompt-toast-error::after {
    background: linear-gradient(90deg,
        var(--color-error) 0%,
        #c82333 100%);
}

.mprompt-toast-warning::after {
    background: linear-gradient(90deg,
        var(--color-warning) 0%,
        #e89b00 100%);
}

@keyframes toast-progress {
    0% {
        transform: scaleX(1);
    }
    100% {
        transform: scaleX(0);
    }
}

/* Responsive Design for Toasts */
@media (max-width: 640px) {
    .mprompt-toast-container {
        left: var(--spacing-sm) !important;
        right: var(--spacing-sm) !important;
        padding: var(--spacing-sm);
    }

    .mprompt-toast {
        min-width: 100%;
        max-width: 100%;
    }

    @keyframes toast-slide-in {
        0% {
            transform: translateY(-100%) scale(0.95);
            opacity: 0;
        }
        100% {
            transform: translateY(0) scale(1);
            opacity: 1;
        }
    }
}

/* Accessibility: Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .mprompt-toast-enter {
        animation: none;
    }

    .mprompt-toast-success .mprompt-toast-icon i {
        animation: none;
    }

    .mprompt-toast-close:hover {
        transform: none;
    }

    .mprompt-toast::after {
        animation: none;
    }
}

/* ============================================
   AI Enhancement Overlay
   ============================================ */

.ai-enhancement-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(8px) saturate(150%);
    -webkit-backdrop-filter: blur(8px) saturate(150%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    animation: ai-overlay-fade-in 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes ai-overlay-fade-in {
    0% {
        opacity: 0;
        transform: scale(0.98);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.ai-enhancement-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.ai-icon-container {
    position: relative;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-icon {
    font-size: 2.5rem;
    color: var(--color-primary);
    animation: ai-icon-pulse 2s ease-in-out infinite;
    z-index: 2;
    position: relative;
}

@keyframes ai-icon-pulse {
    0%, 100% {
        transform: scale(1);
        filter: brightness(1);
    }
    50% {
        transform: scale(1.1);
        filter: brightness(1.3);
    }
}

.ai-sparkle {
    position: absolute;
    width: 12px;
    height: 12px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: 50%;
    opacity: 0;
    animation: ai-sparkle 2s ease-in-out infinite;
}

.ai-sparkle-1 {
    top: 10px;
    right: 10px;
    animation-delay: 0s;
}

.ai-sparkle-2 {
    bottom: 10px;
    left: 10px;
    animation-delay: 0.6s;
}

.ai-sparkle-3 {
    top: 50%;
    left: -10px;
    transform: translateY(-50%);
    animation-delay: 1.2s;
}

@keyframes ai-sparkle {
    0%, 100% {
        opacity: 0;
        transform: scale(0) translateY(0);
    }
    50% {
        opacity: 1;
        transform: scale(1) translateY(-5px);
    }
}

.ai-text {
    color: var(--color-text-primary);
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.ai-dots {
    display: inline-flex;
    align-items: center;
    gap: 0.15rem;
}

.ai-dot {
    display: inline-block;
    animation: ai-dot-bounce 1.4s ease-in-out infinite;
    color: var(--color-primary);
}

.ai-dot:nth-child(1) {
    animation-delay: 0s;
}

.ai-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.ai-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes ai-dot-bounce {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.7;
    }
    30% {
        transform: translateY(-8px);
        opacity: 1;
    }
}

/* Textarea state when AI is enhancing */
.form-control.ai-enhancing {
    filter: blur(2px);
    opacity: 0.6;
    pointer-events: none;
    user-select: none;
}

/* Success animation when enhancement completes */
@keyframes ai-success-highlight {
    0% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

.ai-enhancement-success {
    animation: ai-success-highlight 0.6s ease-out;
}

/* Accessibility: Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .ai-enhancement-overlay {
        animation: none;
    }

    .ai-icon {
        animation: none;
    }

    .ai-sparkle {
        animation: none;
        display: none;
    }

    .ai-dot {
        animation: none;
    }

    .ai-enhancement-success {
        animation: none;
    }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .ai-icon-container {
        width: 60px;
        height: 60px;
    }

    .ai-icon {
        font-size: 2rem;
    }

    .ai-text {
        font-size: 0.9375rem;
    }
}