/* Variables */
:root {
    /* Light theme */
    --bg-primary: #f8f9fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f3f5;
    --text-primary: #212529;
    --text-secondary: #495057;
    --text-tertiary: #6c757d;
    --border-color: #dee2e6;
    --accent-color: #0066ff;
    --accent-hover: #0055d4;
    --accent-light: rgba(0, 102, 255, 0.1);
    --highlight-bg: rgba(0, 102, 255, 0.1);
    --match-highlight: rgba(25, 135, 84, 0.2);
    --input-bg: #ffffff;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --error-color: #dc3545;
    --success-color: #198754;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --modal-bg: rgba(0, 0, 0, 0.5);
    
    /* Visualization colors */
    --viz-literal: #4361ee;
    --viz-character-class: #3a0ca3;
    --viz-group: #7209b7;
    --viz-quantifier: #f72585;
    --viz-anchor: #4cc9f0;
    
    /* Component/theme extras (used in community cards, code blocks, etc.) */
    --card-bg: var(--bg-secondary);
    --code-bg: var(--bg-tertiary);
    --mono-font: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    --tag-bg: #eef2f7;
    --tag-text: #324055;
    --primary-color: var(--accent-color);
    --hover-bg: rgba(0, 0, 0, 0.05);
    
    /* Testing colors */
    --test-pass: #d9f0e0;
    --test-fail: #f9e3e3;
}

/* Dark theme variables */
.dark-mode {
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-tertiary: #2d2d2d;
    --text-primary: #f8f9fa;
    --text-secondary: #adb5bd;
    --text-tertiary: #868e96;
    --border-color: #343a40;
    --accent-color: #339af0;
    --accent-hover: #228be6;
    --accent-light: rgba(51, 154, 240, 0.2);
    --highlight-bg: rgba(51, 154, 240, 0.2);
    --match-highlight: rgba(40, 167, 69, 0.3);
    --input-bg: #2d2d2d;
    --shadow-color: rgba(0, 0, 0, 0.3);
    
    /* Testing colors */
    --test-pass: #163829;
    --test-fail: #3b1919;
    
    /* Component/theme extras (dark mode) */
    --card-bg: var(--bg-secondary);
    --code-bg: #1a1a1a;
    --tag-bg: #2a2f36;
    --tag-text: #c7d1dc;
    --hover-bg: rgba(255, 255, 255, 0.06);
}

/* Reset and base styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color 0.3s, color 0.3s;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

h1, h2, h3, h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

button, input, textarea, select {
    font-family: inherit;
}

input, textarea, select {
    background-color: var(--input-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.5rem;
    transition: all 0.2s ease;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-light);
}

/* Header styles */
header {
    background-color: var(--bg-secondary);
    padding: 1rem 0;
    box-shadow: 0 2px 5px var(--shadow-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.highlight {
    color: var(--accent-color);
}

/* Theme toggle */
.theme-toggle button {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background-color 0.3s;
}

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

/* Main sections */
main {
    padding: 2rem 0;
}

section {
    margin-bottom: 2rem;
}

.input-container {
    background-color: var(--bg-secondary);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 10px var(--shadow-color);
}

.input-header, .test-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 1rem;
    gap: 1rem;
}

.welcome-actions {
    display: flex;
    gap: 0.5rem;
}

.controls {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.flag-options {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.flag-options label {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    cursor: pointer;
    user-select: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Regex input styling */
.regex-input-wrapper {
    display: flex;
    align-items: center;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.5rem;
    margin-bottom: 1rem;
}

.regex-delimiter {
    color: var(--accent-color);
    font-size: 1.2rem;
    font-weight: bold;
    padding: 0 0.5rem;
}

#flags-display {
    color: var(--accent-color);
    font-style: italic;
    padding-left: 0.25rem;
}

#regex-input {
    flex: 1;
    border: none;
    outline: none;
    background-color: transparent;
    color: var(--text-primary);
    font-size: 1rem;
    padding: 0.5rem;
}

.action-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.btn {
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%, -50%);
    transform-origin: 50% 50%;
}

.btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.btn:active::after {
    animation: ripple 0.6s ease-out;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }
    100% {
        transform: scale(25, 25);
        opacity: 0;
    }
}

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

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

.btn-sm {
    padding: 0.35rem 0.7rem;
    font-size: 0.85rem;
}

/* Test input area */
#test-input {
    width: 100%;
    min-height: 150px;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--input-bg);
    color: var(--text-primary);
    font-size: 1rem;
    resize: vertical;
    outline: none;
    transition: border-color 0.2s;
}

#test-input:focus {
    border-color: var(--accent-color);
}

.match-info {
    margin-top: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Tab navigation */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.tab-btn {
    background-color: transparent;
    border: none;
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 1rem;
    position: relative;
    white-space: nowrap;
}

.tab-btn.active {
    color: var(--accent-color);
    font-weight: 500;
}

.tab-btn.active::after {
    content: "";
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--accent-color);
}

.tab-pane {
    display: none;
    padding: 1rem;
    background-color: var(--bg-secondary);
    border-radius: 0 0 8px 8px;
}

.tab-pane.active {
    display: block;
}

/* Match results styling */
#match-results {
    padding: 1rem;
    background-color: var(--bg-secondary);
    border-radius: 4px;
    min-height: 100px;
}

.match-highlight {
    background-color: var(--match-highlight);
    border-radius: 2px;
    cursor: pointer;
    transition: background-color 0.2s;
    padding: 0 2px;
}

.match-highlight:hover {
    background-color: var(--accent-light);
}

.highlighted-text {
    line-height: 1.6;
    margin-bottom: 1rem;
    background-color: var(--bg-tertiary);
    padding: 1rem;
    border-radius: 4px;
    white-space: pre-wrap;
}

.match-detail-item {
    padding: 0.75rem;
    border-radius: 4px;
    margin-bottom: 0.75rem;
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.match-detail-item:hover {
    box-shadow: 0 2px 5px var(--shadow-color);
}

.active-match {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px var(--accent-light);
    animation: highlight 1s ease;
}

.match-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.match-value {
    font-family: monospace;
    background-color: var(--bg-tertiary);
    padding: 0.5rem;
    border-radius: 4px;
    margin-bottom: 0.5rem;
}

.match-groups ul {
    margin-top: 0.5rem;
    padding-left: 1.5rem;
}

.empty-state {
    color: var(--text-secondary);
    text-align: center;
    padding: 2rem 0;
}

/* Explanation tab */
.explanation-toggle-container {
    margin-bottom: 1rem;
    display: flex;
    justify-content: flex-end;
}

#regex-explanation, #regex-plain-explanation {
    line-height: 1.8;
}

.explanation-item {
    margin-bottom: 0.75rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.explanation-item:last-child {
    border-bottom: none;
}

.token {
    font-family: monospace;
    background-color: var(--highlight-bg);
    padding: 0.15rem 0.3rem;
    border-radius: 3px;
}

/* Visualizer tab */
.visualizer-container {
    height: 500px;
    position: relative;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-tertiary);
}

#visualizer-graph {
    width: 100%;
    height: 100%;
}

.visualizer-legend {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 2px;
}

.legend-color.literal {
    background-color: var(--viz-literal);
}

.legend-color.character-class {
    background-color: var(--viz-character-class);
}

.legend-color.group {
    background-color: var(--viz-group);
}

.legend-color.quantifier {
    background-color: var(--viz-quantifier);
}

.legend-color.anchor {
    background-color: var(--viz-anchor);
}

.loading-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Pattern library */
.pattern-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.pattern-card {
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.pattern-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px var(--shadow-color);
}

.pattern-name {
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.pattern-regex {
    font-family: monospace;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
    word-break: break-all;
}

.pattern-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Community patterns tab */
.community-patterns-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.community-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.search-container {
    position: relative;
}

.search-container input {
    padding-right: 2.5rem;
    width: 250px;
}

.search-icon {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.community-patterns-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tag {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: 16px;
    padding: 0.25rem 0.75rem;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}

.tag.active {
    background-color: var(--accent-color);
    color: white;
}

.tag:hover:not(.active) {
    background-color: var(--accent-light);
}

.community-patterns-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.community-pattern-card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    background-color: var(--card-bg);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
}

.community-pattern-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

.community-pattern-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 10px;
}

.community-pattern-name {
    margin: 0;
    font-size: 1.1rem;
}

.community-pattern-author {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.community-pattern-regex {
    font-family: var(--mono-font);
    padding: 8px;
    background-color: var(--code-bg);
    border-radius: 4px;
    overflow-x: auto;
    margin-bottom: 10px;
    white-space: nowrap;
}

.community-pattern-description {
    font-size: 0.9rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.community-pattern-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.community-pattern-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.community-pattern-tag {
    font-size: 0.7rem;
    padding: 2px 6px;
    background-color: var(--tag-bg);
    color: var(--tag-text);
    border-radius: 12px;
}

.view-detail-link {
    color: var(--primary-color);
    font-size: 0.9rem;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.view-detail-link:hover {
    background-color: var(--hover-bg);
}

.loading-message {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
}

/* Saved patterns */
.saved-patterns-section {
    background-color: var(--bg-secondary);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 10px var(--shadow-color);
}

.saved-patterns-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.saved-pattern-card {
    position: relative;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem;
}

.saved-pattern-actions {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    display: flex;
    gap: 0.5rem;
}

.saved-pattern-actions button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.saved-pattern-actions button:hover {
    color: var(--accent-color);
}

.saved-pattern-name {
    font-weight: 500;
    margin-right: 2.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.saved-pattern-regex {
    font-family: monospace;
    color: var(--accent-color);
    word-break: break-all;
}

/* Modal styling */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--modal-bg);
    z-index: 1100;
    overflow-y: auto;
}

.modal-content {
    background-color: var(--bg-secondary);
    margin: 10vh auto;
    width: 90%;
    max-width: 600px;
    border-radius: 8px;
    box-shadow: 0 5px 20px var(--shadow-color);
    animation: modalFadeIn 0.3s;
}

.modal-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.modal-body {
    padding: 1.5rem;
}

/* Export modal styling */
.export-options {
    margin-bottom: 1.5rem;
}

.export-option-group {
    margin-bottom: 1rem;
}

.export-option-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.export-option-group select {
    width: 100%;
    padding: 0.5rem;
}

.export-preview {
    margin-bottom: 1.5rem;
}

.export-preview label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.export-preview pre {
    margin: 0;
    background-color: var(--bg-tertiary);
    border-radius: 4px;
    padding: 1rem;
    overflow-x: auto;
}

.export-actions {
    display: flex;
    gap: 1rem;
}

/* Publish modal styling */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.form-group input, .form-group textarea {
    width: 100%;
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.publish-example {
    padding: 1rem;
    background-color: var(--bg-tertiary);
    border-radius: 4px;
}

.pattern-preview {
    font-family: monospace;
    color: var(--accent-color);
}

.publish-actions {
    margin-top: 1rem;
    display: flex;
    justify-content: flex-end;
}

/* Share modal styling */
.share-url-container {
    display: flex;
    gap: 0.5rem;
}

.share-url-container input {
    flex: 1;
}

.checkbox-group {
    margin-top: 0.5rem;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
}

.share-qr-code {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
}

#share-qr-container {
    padding: 1rem;
    background-color: white;
    border-radius: 4px;
}

/* Test Suite Mode */
#test-suite-mode {
    margin-top: 1rem;
}

.test-suite-controls {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.test-cases-container {
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-tertiary);
}

#test-cases-table {
    width: 100%;
    border-collapse: collapse;
}

#test-cases-table th, #test-cases-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

#test-cases-table th {
    background-color: var(--bg-tertiary);
    position: sticky;
    top: 0;
    z-index: 10;
}

.test-row-pass {
    background-color: var(--test-pass);
    transition: background-color 0.3s ease;
    animation: slideIn 0.3s ease-out;
}

.test-row-fail {
    background-color: var(--test-fail);
    transition: background-color 0.3s ease;
    animation: slideIn 0.3s ease-out;
}

.test-result {
    font-weight: 500;
}

.test-result.pass {
    color: var(--success-color);
}

.test-result.fail {
    color: var(--error-color);
}

.test-summary {
    padding: 1rem;
    background-color: var(--bg-tertiary);
    border-radius: 4px;
    margin-top: 1rem;
    border-left: 4px solid var(--border-color);
    transition: all 0.3s ease;
}

.test-summary.success {
    border-left-color: var(--success-color);
}

.test-summary.error {
    border-left-color: var(--error-color);
}

.test-summary.warning {
    border-left-color: var(--warning-color);
}

.test-summary-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.test-summary-header h4 {
    margin: 0;
}

.test-percent {
    font-weight: bold;
    font-size: 1.1rem;
}

.test-summary-counts {
    display: flex;
    gap: 1rem;
}

.test-actions {
    display: flex;
    gap: 0.5rem;
}

.test-actions button {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.2s;
    padding: 0.25rem;
}

.test-actions button:hover {
    color: var(--accent-color);
    transform: scale(1.1);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Regex Coach */
.regex-coach-container {
    background-color: var(--accent-light);
    border-left: 4px solid var(--accent-color);
    padding: 1rem;
    margin-bottom: 1.5rem;
    border-radius: 0 4px 4px 0;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
}

.regex-coach-content {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.coach-icon {
    color: var(--accent-color);
    font-size: 1.2rem;
    padding-top: 2px;
}

.toggle-coach-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    padding: 0;
}

.toggle-coach-btn:hover {
    color: var(--text-primary);
}

/* Footer */
footer {
    background-color: var(--bg-secondary);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-secondary);
    margin-top: 3rem;
    border-top: 1px solid var(--border-color);
}

footer i {
    color: #e74c3c;
}

/* Utility classes */
.error {
    color: var(--error-color);
}

.success {
    color: var(--success-color);
}

.warning {
    color: var(--warning-color);
}

.hidden {
    display: none;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes modalFadeIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

@keyframes slideIn {
    from { transform: translateY(10px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

@keyframes highlight {
    0% { background-color: var(--accent-light); }
    100% { background-color: transparent; }
}

.fade-in {
    animation: fadeIn 0.3s ease-in-out;
}

.slide-in {
    animation: slideIn 0.3s ease-out;
}

/* Notification styling */
.notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 0.75rem 1.25rem;
    border-radius: 4px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
    transform: translateY(100px);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    z-index: 1200;
    max-width: 350px;
    display: flex;
    align-items: center;
}

.notification.success {
    background-color: var(--success-color);
    color: white;
}

.notification.error {
    background-color: var(--error-color);
    color: white;
}

.notification.warning {
    background-color: var(--warning-color);
    color: #212529;
}

.notification.info {
    background-color: var(--info-color);
    color: #212529;
}

.notification.show {
    transform: translateY(0);
    opacity: 1;
}

.notification::before {
    margin-right: 10px;
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
}

.notification.success::before {
    content: "\f00c"; /* checkmark */
}

.notification.error::before {
    content: "\f00d"; /* X */
}

.notification.warning::before {
    content: "\f071"; /* warning */
}

.notification.info::before {
    content: "\f05a"; /* info */
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .input-header, .test-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .welcome-actions {
        margin-bottom: 1rem;
        width: 100%;
    }
    
    .controls {
        margin-top: 0.5rem;
        width: 100%;
    }
    
    .flag-options {
        flex-direction: column;
        margin-top: 0.5rem;
        width: 100%;
    }
    
    .tabs {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 5px;
        margin-bottom: 0.5rem;
    }
    
    .tab-btn {
        padding: 0.75rem 1rem;
        white-space: nowrap;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .modal-content {
        margin: 5vh auto;
        width: 95%;
    }
    
    /* Improve action spacing */
    .action-buttons .btn {
        margin-bottom: 0.5rem;
    }
    
    /* Improved community tag layout */
    .community-patterns-tags {
        flex-wrap: nowrap;
        overflow-x: auto;
        padding-bottom: 5px;
        margin-bottom: 1rem;
    }
    
    /* Adjust test suite for mobile */
    .test-suite-controls {
        flex-direction: column;
        width: 100%;
    }
    
    .test-suite-controls .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }
}