* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --accent: #4a9eff;
    --accent-hover: #3a8eef;
    --border: #404040;
    --shadow: rgba(0, 0, 0, 0.3);
}

body.light-mode {
    --bg-primary: #f5f5f5;
    --bg-secondary: #fff;
    --bg-tertiary: #f9f9f9;
    --text-primary: #333;
    --text-secondary: #666;
    --accent: #0066cc;
    --accent-hover: #0052a3;
    --border: #e0e0e0;
    --shadow: rgba(0, 0, 0, 0.1);
}

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

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

/* Skip to content link for accessibility */
.skip-to-content {
    position: absolute;
    top: 0;
    left: 0;
    background: var(--accent);
    color: #fff;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    font-weight: 500;
    z-index: 1000;
    border-radius: 0 0 4px 0;
    /* Extra 8px so no sub-pixel row of the bar shows when hidden */
    transform: translateY(calc(-100% - 8px));
    transition: transform 0.3s ease;
}

.skip-to-content:focus {
    transform: translateY(0);
}

/* Universal focus indicators for accessibility */
*:focus {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}

/* Enhanced focus indicators for specific elements */
a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus,
[tabindex]:focus {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
    box-shadow: 0 0 0 1px var(--bg-primary), 0 0 0 5px rgba(74, 158, 255, 0.2);
    border-radius: 2px;
}

/* Focus indicators for navigation elements */
nav a:focus {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
    background: rgba(74, 158, 255, 0.1);
    border-radius: 4px;
}

/* Focus indicators for buttons */
button:focus,
.btn:focus {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
    box-shadow: 0 0 0 1px var(--bg-primary), 0 0 0 5px rgba(74, 158, 255, 0.3);
}

/* Focus indicators for form elements */
input:focus,
select:focus,
textarea:focus {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--bg-primary), 0 0 0 5px rgba(74, 158, 255, 0.2);
}

/* Focus indicators for custom elements */
.theme-toggle:focus {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
    border-radius: 4px;
    background: rgba(74, 158, 255, 0.1);
}

/* Focus indicators for social links */
.social-link:focus {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
    transform: translateY(-2px);
    box-shadow: 0 0 0 1px var(--bg-primary), 0 4px 12px var(--shadow);
}

/* Focus indicators for modal elements */
.modal-close:focus {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
    background: rgba(74, 158, 255, 0.2);
    border-radius: 4px;
}

/* Focus indicators for range inputs (skill assessment) */
input[type="range"]:focus {
    outline: 3px solid var(--accent);
    outline-offset: 4px;
}

/* Focus indicators for info buttons */
.info-button:focus {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
    background: rgba(74, 158, 255, 0.2);
    border-radius: 50%;
}

/* Ensure focus indicators work in both themes */
body.light-mode *:focus,
body.light-mode a:focus,
body.light-mode button:focus,
body.light-mode input:focus,
body.light-mode select:focus,
body.light-mode textarea:focus {
    outline-color: var(--accent);
    box-shadow: 0 0 0 1px var(--bg-primary), 0 0 0 5px rgba(0, 102, 204, 0.2);
}

body.light-mode nav a:focus {
    background: rgba(0, 102, 204, 0.1);
}

body.light-mode .theme-toggle:focus {
    background: rgba(0, 102, 204, 0.1);
}

body.light-mode button:focus,
body.light-mode .btn:focus {
    box-shadow: 0 0 0 1px var(--bg-primary), 0 0 0 5px rgba(0, 102, 204, 0.3);
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    *:focus,
    a:focus,
    button:focus,
    input:focus,
    select:focus,
    textarea:focus {
        outline: 4px solid var(--accent);
        outline-offset: 2px;
        box-shadow: 0 0 0 2px var(--bg-primary), 0 0 0 6px var(--accent);
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .skip-to-content {
        transition: none;
    }
    
    *:focus {
        transition: none;
    }
}

nav {
    background: var(--bg-secondary);
    box-shadow: 0 2px 4px var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 2rem;
}

nav a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.3s;
}

nav a:hover,
nav a.active {
    color: var(--accent);
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    transition: transform 0.3s;
}

.theme-toggle:hover {
    transform: rotate(90deg);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
    fill: var(--text-primary);
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.hero {
    text-align: center;
    padding: 3rem 0;
}

.hero-with-image {
    display: flex;
    align-items: center;
    gap: 3rem;
    text-align: left;
    max-width: 900px;
    margin: 0 auto;
}

.hero-image {
    flex-shrink: 0;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--accent);
    box-shadow: 0 4px 12px var(--shadow);
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-text {
    flex: 1;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.content {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--shadow);
    margin-top: 2rem;
}

.content h2 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.content p {
    margin-bottom: 1rem;
}

/* Links inside running text: the browser default blue fails contrast on the dark theme */
.content p a:not(.btn),
.content li a:not(.btn) {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.content p a:not(.btn):hover,
.content li a:not(.btn):hover {
    color: var(--text-primary);
}

#privacy h3 {
    margin: 1.5rem 0 0.5rem;
    color: var(--text-primary);
}

#privacy ul {
    margin: 0 0 1rem 1.25rem;
}

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

.social-links {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--text-secondary);
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--text-secondary);
    border-radius: 8px;
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg);
    transform: translateY(-2px);
}

.social-link svg {
    flex-shrink: 0;
}

/* Links Page */
.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.link-card {
    background: var(--bg-tertiary);
    padding: 2rem;
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-primary);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 2px solid var(--border);
}

.link-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px var(--shadow);
}

.link-card h3 {
    margin-bottom: 0.5rem;
    color: var(--accent);
}

/* Presentations Page */
.presentation {
    margin-bottom: 3rem;
}

.presentation h3 {
    margin-bottom: 1rem;
}

.presentation-downloads {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.presentation-downloads .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.presentation-downloads svg {
    flex-shrink: 0;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    margin: 1rem 0;
    border-radius: 8px;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.external-video {
    margin: 1rem 0;
    padding: 3rem;
    border: 2px dashed var(--text-secondary);
    border-radius: 8px;
    text-align: center;
    background: var(--bg-secondary);
}

.video-link {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem 2rem;
    color: var(--accent);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.video-link:hover {
    color: var(--text);
    transform: translateY(-2px);
}

.video-link svg {
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.video-link:hover svg {
    opacity: 1;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--border);
    margin-bottom: 2rem;
}

.tab-button {
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s;
}

.tab-button:hover {
    color: var(--text-primary);
}

.tab-button.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.works-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.works-card {
    background: var(--bg-tertiary);
    padding: 1.5rem 2rem;
    border-radius: 8px;
    border-left: 4px solid var(--accent);
}

.works-card h3 {
    margin-bottom: 0.5rem;
}

.works-card h3 a {
    color: var(--text-primary);
    text-decoration: none;
}

.works-card h3 a:hover {
    color: var(--accent);
}

.works-card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.topic-page .topic-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.topic-versions {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.topic-versions h2 {
    margin-bottom: 1rem;
}

.version-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.empty-tab-message {
    color: var(--text-secondary);
    font-style: italic;
    padding: 2rem 0;
}

/* Books & Articles Page */
.articles-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin: 2rem 0 3rem 0;
}

.article-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 8px;
    border-left: 4px solid var(--accent);
}

.article-card h3 {
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.article-card p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.book-card {
    background: var(--bg-tertiary);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
}

.book-cover {
    width: 100%;
    height: 300px;
    background: var(--border);
    border-radius: 4px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.book-cover img {
    max-width: 100%;
    max-height: 100%;
    object-fit: cover;
}

.book-card h3 {
    margin-bottom: 0.5rem;
}

.book-card p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--accent);
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    transition: background 0.3s;
}

.btn:hover {
    background: var(--accent-hover);
}

footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    margin-top: 3rem;
}

/* Responsive */
@media (max-width: 768px) {
    nav ul {
        gap: 1rem;
        flex-wrap: wrap;
    }
    
    .hero-with-image {
        flex-direction: column;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-image {
        width: 200px;
        height: 200px;
    }
    
    .hero-text {
        text-align: center;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    main {
        padding: 1rem;
    }
}

/* Contact Form */
.contact-form {
    max-width: 700px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border);
    border-radius: 4px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 1rem;
}

.form-group-small,
.form-group-large {
    margin-bottom: 1.5rem;
}

.error-message {
    display: block;
    color: #ff4444;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    min-height: 1.25rem;
}

.form-group input.invalid,
.form-group select.invalid,
.form-group textarea.invalid {
    border-color: #ff4444;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.3s, transform 0.1s;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-primary:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.3);
}

.btn-primary:disabled {
    background: var(--border);
    cursor: not-allowed;
    opacity: 0.6;
}

.btn-secondary {
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid var(--border);
    padding: 0.75rem 2rem;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: border-color 0.3s, color 0.3s;
}

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

.btn-secondary:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.1);
}

.form-status {
    margin-top: 2rem;
    padding: 1rem;
    border-radius: 4px;
    display: none;
}

.form-status.success {
    display: block;
    background: rgba(76, 175, 80, 0.1);
    border: 2px solid #4caf50;
    color: #4caf50;
}

.form-status.error {
    display: block;
    background: rgba(255, 68, 68, 0.1);
    border: 2px solid #ff4444;
    color: #ff4444;
}

.form-status.loading {
    display: block;
    background: rgba(74, 158, 255, 0.1);
    border: 2px solid var(--accent);
    color: var(--accent);
}

/* Responsive adjustments for contact form */
@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
    }
}

/* Modal Styles */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: 8px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: 0 4px 20px var(--shadow);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 2px solid var(--border);
}

.modal-header h2 {
    margin: 0;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: background 0.3s, color 0.3s;
}

.modal-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-close:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.3);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;
}

.modal-description {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.json-display {
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    border-radius: 4px;
    padding: 1rem;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-wrap: break-word;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 2px solid var(--border);
    display: flex;
    justify-content: flex-end;
}

/* Responsive modal */
@media (max-width: 768px) {
    .modal-content {
        max-height: 95vh;
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: 1rem;
    }
}

/* Learning Page Styles */
.learning-container {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    align-items: start;
}

.learning-nav {
    position: sticky;
    top: 80px;
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px var(--shadow);
    height: fit-content;
}

.learning-nav .nav-toggle {
    display: none;
}

.learning-nav nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.learning-nav nav a {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 4px;
    transition: background 0.3s, color 0.3s;
    font-weight: 500;
}

.learning-nav nav a:hover {
    background: var(--bg-tertiary);
    color: var(--accent);
}

.learning-nav nav a.active {
    background: var(--accent);
    color: #fff;
}

.learning-content {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 2.5rem;
    box-shadow: 0 2px 8px var(--shadow);
    max-width: 800px;
}

.topic-content {
    display: none;
}

.topic-content.active {
    display: block;
}

.topic-content h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    line-height: 1.2;
}

.topic-content h2 {
    font-size: 1.75rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border);
    padding-bottom: 0.5rem;
}

.topic-intro {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.topic-content p {
    margin-bottom: 1rem;
    line-height: 1.7;
}

.topic-content ul {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.topic-content li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.topic-navigation {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border);
}

.topic-navigation a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--accent);
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 500;
    transition: background 0.3s, transform 0.1s;
}

.topic-navigation a:hover {
    background: var(--accent-hover);
    transform: translateX(4px);
}

/* Mobile Navigation for Learning Page */
@media (max-width: 768px) {
    .learning-container {
        grid-template-columns: 1fr;
        padding: 1rem;
    }
    
    .learning-nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: 280px;
        height: 100vh;
        z-index: 200;
        transition: left 0.3s ease;
        border-radius: 0;
        padding-top: 4rem;
        overflow-y: auto;
    }
    
    .learning-nav.open {
        left: 0;
    }
    
    .learning-nav .nav-toggle {
        display: flex;
        position: fixed;
        top: 80px;
        left: 1rem;
        z-index: 201;
        background: var(--accent);
        color: #fff;
        border: none;
        border-radius: 4px;
        padding: 0.75rem 1rem;
        cursor: pointer;
        font-size: 1.25rem;
        box-shadow: 0 2px 8px var(--shadow);
        transition: background 0.3s;
    }
    
    .learning-nav .nav-toggle:hover {
        background: var(--accent-hover);
    }
    
    .learning-nav.open .nav-toggle .hamburger-icon::before {
        content: '✕';
    }
    
    .learning-content {
        padding: 1.5rem;
        margin-top: 3rem;
    }
    
    .topic-content h1 {
        font-size: 2rem;
    }
    
    .topic-content h2 {
        font-size: 1.5rem;
    }
}

/* Focus indicators for accessibility */
.learning-nav nav a:focus,
.topic-navigation a:focus,
.learning-nav .nav-toggle:focus {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}