:root {
    /* Modern Color Palette */
    --primary: #1a1a1a;
    --primary-light: #2d2d2d;
    --secondary: #14b8a6;
    --secondary-light: #2dd4bf;
    --accent: #ec4899;
    --accent-light: #f472b6;
    --background: #ffffff;
    --surface: #f8fafc;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    
    /* Typography */
    --font-heading: 'Glacial Indifference', sans-serif;
    --font-body: 'Glacial Indifference', sans-serif;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--text);
    background-color: var(--background);
    -webkit-font-smoothing: antialiased;
    letter-spacing: 0.02em;
    margin: 0;
    padding: 0;
}

/* Header Styles */
header {
    background-color: var(--background);
    color: var(--text);
    padding: var(--space-sm) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
    border-bottom: 1px solid var(--border);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.logo-container {
    display: flex;
    flex-direction: column;
}

.tagline {
    font-size: 1rem;
    color: var(--text-light);
    margin-top: 0.25rem;
    font-weight: 400;
    font-style: italic;
    letter-spacing: 0.04em;
}

/* Navigation */
.nav-links {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
}

.nav-links a {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    padding: var(--space-xs) 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    border-radius: 6px;
    transition: var(--transition);
    font-size: 1.125rem;
    font-family: var(--font-body);
    font-weight: 500;
}

.dropdown-content {
    position: absolute;
    top: calc(100% - 5px); /* Pull up slightly to overlap the padding */
    right: 0;
    background: white;
    min-width: 280px;
    box-shadow: var(--shadow-lg);
    border-radius: 8px;
    z-index: 1000;
    padding: var(--space-xs) 0;
    opacity: 0;
    transform: translateY(-10px);
    transition: var(--transition);
    pointer-events: none;
    visibility: hidden;
}

/* Create invisible padding above dropdown content */
.dropdown-content::before {
    content: '';
    position: absolute;
    top: -20px; /* Match margin-top */
    left: 0;
    right: 0;
    height: 20px;
    background: transparent;
}

.dropdown:hover .dropdown-content {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    visibility: visible;
}

.dropdown-content a {
    color: var(--text);
    padding: var(--space-sm) var(--space-lg);
    display: block;
    transition: var(--transition);
    white-space: nowrap;
}

.dropdown-content a:hover {
    background: var(--surface);
    color: var(--secondary);
}

/* Main Content */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-lg);
}

/* Page Header */
.page-header {
    margin-bottom: var(--space-2xl);
    text-align: center;
}

.title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    color: var(--text);
    line-height: 1.1;
    letter-spacing: -0.02em;
    font-weight: 700;
    text-transform: uppercase;
    font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
    -webkit-font-smoothing: antialiased;
    margin-bottom: var(--space-lg);
}

/* Breadcrumb style for lesson pages */
.unit-title-breadcrumb {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-bottom: var(--space-md);
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-weight: 500;
    text-decoration: none;
    display: inline-block;
    transition: var(--transition);
    font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
    -webkit-font-smoothing: antialiased;
    opacity: 0.7;
    position: relative;
    padding-bottom: var(--space-xs);
}

.unit-title-breadcrumb:hover {
    color: var(--text);
    opacity: 1;
}

/* Activity Cards */
.activities-container {
    display: grid;
    gap: var(--space-xl);
    max-width: 800px;
    margin: 0 auto;
    padding-bottom: var(--space-xl);
}

.activity-card {
    background: var(--background);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: var(--space-xl);
    transition: var(--transition);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.activity-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary);
}

/* Special styling only for lesson template's last card */
.lesson-template .activity-card:last-child {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    padding: 0;
    overflow: hidden;
    background: var(--surface);
}

.lesson-template .activity-card:last-child .activity-image {
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    background-color: var(--surface);
    width: 100%;
    height: 100%;
    min-height: 400px;
}

.lesson-template .activity-card:last-child .activity-content {
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.lesson-template .activity-card:last-child .activity-title {
    font-size: 2.25rem;
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

.lesson-template .activity-card:last-child .activity-description {
    font-size: 1.125rem;
    margin-bottom: var(--space-lg);
    color: var(--text-light);
    max-width: 40ch;
}

.lesson-template .activity-card:last-child .activity-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    max-width: 300px;
}

.lesson-template .activity-card:last-child .activity-link {
    width: 100%;
    justify-content: center;
    padding: var(--space-md) var(--space-lg);
}

.activity-header {
    display: flex;
    align-items: center;
    margin-bottom: var(--space-md);
}

.activity-title {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    color: var(--text);
    font-weight: 700;
    letter-spacing: 0.01em;
    margin-bottom: var(--space-xs);
    text-transform: none;
}

.activity-description {
    margin-bottom: var(--space-lg);
    color: var(--text-light);
    line-height: 1.8;
    font-size: 1.125rem;
    letter-spacing: 0.01em;
}

.activity-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    max-width: 300px;
}

.activity-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-md) var(--space-lg);
    width: 100%;
    background: var(--secondary);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-size: 1.125rem;
}

.activity-link i {
    font-size: 1.1em;
}

.activity-link:hover {
    background: var(--secondary-light);
}

/* Navigation Buttons */
.lesson-navigation {
    display: flex;
    justify-content: space-between;
    max-width: 800px;
    margin: var(--space-xl) auto var(--space-lg);
    gap: var(--space-lg);
}

.nav-button {
    padding: var(--space-sm) var(--space-lg);
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--border);
    border-radius: 6px;
    background: white;
    box-shadow: var(--shadow-sm);
    min-width: 150px;
    text-align: center;
}

.nav-button:hover {
    color: var(--text);
    border-color: var(--secondary);
    box-shadow: var(--shadow);
}

.nav-button:focus {
    outline: none;
}

.nav-button:active {
    transform: translateY(1px);
}

/* Footer */
footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: var(--space-xl) 0;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: grid;
    grid-template-columns: minmax(auto, 500px) minmax(auto, 200px);
    gap: var(--space-xl);
    justify-content: center;
    align-items: center;
}

.footer-section blockquote {
    font-style: italic;
    color: var(--text-light);
    line-height: 1.6;
    margin: 0;
    font-size: 1.125rem;
    max-width: 36ch;
}

.footer-section blockquote cite {
    font-style: normal;
    margin-left: var(--space-xs);
}

.footer-section .social-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-section .social-links a {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.2s ease;
    padding: var(--space-xs) 0;
    font-size: 1.125rem;
    white-space: nowrap;
}

.footer-section .social-links a:hover {
    color: var(--secondary);
}

/* Mobile Styles */
.menu-toggle {
    display: none;
}

@media (max-width: 968px) {
    .activity-card:last-child {
        grid-template-columns: 1fr;
    }

    .activity-card:last-child .activity-image {
        width: 100%;
        height: auto;
        aspect-ratio: 3/4;
    }

    .activity-card:last-child .activity-content {
        padding: var(--space-xl);
    }

    .activity-card:last-child .activity-title {
        font-size: 2rem;
    }

    .activity-card:last-child .activity-links {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: var(--space-sm) var(--space-md);
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: 0;
        width: 100%;
        height: 100vh;
        background: var(--background);
        flex-direction: column;
        gap: var(--space-sm);
        padding: var(--space-2xl) var(--space-lg);
        transform: translateX(100%);
        transition: transform var(--transition);
        z-index: 1000;
        overflow-y: auto;
        align-items: center;
    }

    .nav-links.active {
        transform: translateX(0);
    }

    .dropdown {
        width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .dropdown-toggle {
        width: auto;
        min-width: 0;
        justify-content: center;
        padding: var(--space-sm) var(--space-md);
        border: none;
        border-radius: 6px;
        background: none;
        display: flex;
        align-items: center;
        gap: var(--space-xs);
        font-size: 1.125rem;
        font-family: var(--font-body);
        font-weight: 500;
    }

    .dropdown-toggle::after {
        content: '\f107';
        font-family: 'Font Awesome 6 Free';
        font-weight: 900;
        transition: transform var(--transition);
        margin-left: 0.5em;
        font-size: 1em;
    }

    .dropdown.active .dropdown-toggle::after {
        transform: rotate(180deg);
    }

    .dropdown-content {
        position: static;
        box-shadow: none;
        margin-top: var(--space-xs);
        min-width: 100%;
        opacity: 1;
        transform: none;
        pointer-events: auto;
        visibility: visible;
        display: none;
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: 6px;
        padding: var(--space-xs) 0;
        align-items: center;
    }

    .dropdown-content::before {
        display: none;
    }

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

    .dropdown-content a {
        padding: var(--space-sm);
        text-align: center;
        border-top: 1px solid var(--border);
        width: 100%;
        display: block;
    }

    .dropdown-content a:first-child {
        border-top: none;
    }

    .nav-links a {
        text-align: center;
        width: 100%;
        display: block;
        font-size: 1.125rem;
    }

    .menu-toggle {
        display: block;
        background: none;
        border: none;
        color: var(--text);
        font-size: 1.5rem;
        cursor: pointer;
        padding: var(--space-xs);
        z-index: 1001;
    }

    .menu-toggle svg {
        width: 24px;
        height: 24px;
    }

    .lesson-navigation {
        flex-direction: column;
        padding: 0 var(--space-md);
        margin: var(--space-xl) auto;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
        text-align: center;
    }

    .footer-section .social-links a {
        justify-content: center;
    }

    .footer-section blockquote {
        margin: 0 auto;
    }

    .title {
        font-size: 2.5rem;
    }

    .unit-title-breadcrumb {
        font-size: 0.6875rem;
    }

    .activity-title {
        font-size: 1.25rem;
    }

    .dropdown-toggle.link-style {
        font-size: 1.125rem;
        font-family: var(--font-body);
        font-weight: 500;
        color: var(--text);
        background: none;
        border: none;
        padding: var(--space-sm) var(--space-md);
        text-align: center;
        width: 100%;
        display: block;
    }

    .activity-card-literature {
        display: flex !important;
        flex-direction: column !important;
        padding: 0;
        border-radius: 12px;
        box-shadow: var(--shadow);
        background: var(--surface);
        overflow: hidden;
    }
    .activity-card-literature .activity-image,
    .activity-card-literature .activity-content {
        width: 100%;
    }
    .activity-card-literature .activity-image {
        max-height: 200px;
        overflow: hidden;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .activity-card-literature .activity-image img {
        width: 100%;
        height: auto;
        object-fit: contain;
        display: block;
    }
    .activity-card-literature .activity-content {
        padding: var(--space-md);
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch;
    }
    .activity-card-literature .activity-title {
        font-size: 1.25rem;
        margin-bottom: var(--space-sm);
        line-height: 1.2;
        word-break: break-word;
    }
    .activity-card-literature .activity-links {
        max-width: 100%;
        margin-top: var(--space-sm);
    }
}

/* Accessibility */
.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;
}

/* Override global focus styles for nav buttons */
.nav-button:focus {
    outline: none;
}

/* Print Styles */
@media print {
    header, .lesson-navigation {
        display: none;
    }

    .container {
        padding: 0;
    }

    .activity-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid var(--border);
    }
}

/* Unit Content Styles */
.unit-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.unit-description {
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.125rem;
    line-height: 1.8;
    letter-spacing: 0.01em;
}

.lessons-container {
    display: grid;
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.lesson-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    transition: transform 0.3s;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.lesson-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.lesson-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary);
    min-width: 60px;
}

.lesson-title {
    font-size: 1.5rem;
    color: var(--primary);
    flex: 1;
}

.lesson-link {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background-color: var(--secondary);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: background-color 0.3s;
    white-space: nowrap;
}

.lesson-link:hover {
    background-color: var(--secondary-light);
}

@media (max-width: 768px) {
    .lesson-card {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .lesson-number {
        min-width: auto;
    }
}

/* Remove old classes */
.lesson-header,
.unit-header,
.lesson-title,
.unit-title {
    /* These classes are deprecated in favor of .page-header and .title */
}

.link-style {
    background: none;
    border: none;
    padding: 0;
    font: inherit;
    color: inherit;
    text-decoration: none;
    cursor: pointer;
}

.link-style:hover {
    color: var(--secondary);
}

/* Test Template Styles */
.test-container {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-xl);
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.test-screen {
    text-align: center;
}

.instructions-container {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
    padding: var(--space-md);
    background: var(--surface);
    border-radius: 8px;
}

.audio-button {
    background: var(--secondary);
    color: white;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
}

.audio-button:hover {
    background: var(--secondary-light);
    transform: scale(1.05);
}

.instructions {
    font-size: 1.125rem;
    color: var(--text);
    text-align: left;
    margin: 0;
    line-height: 1.5;
}

.primary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-md) var(--space-lg);
    width: 100%;
    max-width: 300px;
    background: var(--secondary);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-size: 1.125rem;
    border: none;
    cursor: pointer;
}

.primary-button i {
    font-size: 1.1em;
}

.primary-button:hover {
    background: var(--secondary-light);
}

.test-controls {
    margin-bottom: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.button-container {
    display: flex;
    justify-content: center;
    margin: 0 auto;
}

.feedback-container {
    height: 120px;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.feedback {
    font-size: 1.25rem;
    font-weight: 500;
    opacity: 0;
    transition: opacity 0.3s ease;
    position: absolute;
    top: 40%;
    transform: translateY(-50%);
    margin: 0;
    width: 100%;
    text-align: center;
}

.score {
    font-size: 1.125rem;
    color: var(--text-light);
    margin: 0;
    position: absolute;
    bottom: 0;
    width: 100%;
    text-align: center;
}

.feedback.correct {
    color: #10b981;
    opacity: 1;
}

.feedback.incorrect {
    color: #ef4444;
    opacity: 1;
}

.letter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: var(--space-md);
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-lg);
}

.letter-tile {
    aspect-ratio: 1;
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text);
}

.letter-tile:hover {
    background: var(--secondary-light);
    color: white;
    transform: translateY(-2px);
    border-color: var(--secondary-light);
}

/* Styles for multi-phonogram letter tiles */
.letter-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    width: 100%;
    line-height: 0.9;
    padding: 2px 0;
}

.letter-content div {
    font-size: 0.9em;
    margin: 1px 0;
}

.results-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--text);
    margin-bottom: var(--space-lg);
}

.final-score {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: var(--space-xl);
    color: var(--text);
}

.results-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

.result-item {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    border-radius: 6px;
    background: var(--surface);
    font-size: 1.125rem;
    /* Ensure all children are vertically centered */
}

.result-sound-group, .result-selected {
    display: flex;
    align-items: center;
    min-height: 2.2em;
    line-height: 1.2;
}

.result-item.correct {
    background: rgba(var(--secondary-rgb), 0.1);
    color: var(--secondary-dark);
    border: 1px solid rgba(var(--secondary-rgb), 0.2);
}

.result-item.incorrect {
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
}

.result-mark {
    font-size: 1.5rem;
    font-weight: bold;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: var(--space-sm);
}

.result-item.correct .result-mark {
    color: var(--secondary);
}

.result-item.incorrect .result-mark {
    color: rgb(244, 63, 94);
    font-size: 1.75rem;
    letter-spacing: -0.05em;
}

@media (max-width: 768px) {
    .test-container {
        padding: var(--space-md);
    }

    .letter-grid {
        grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
        gap: var(--space-sm);
        padding: var(--space-md);
    }

    .letter-tile {
        font-size: 1.25rem;
    }

    .result-item {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-sm);
    }

    .instructions-container {
        flex-direction: column;
        text-align: center;
    }

    .instructions {
        text-align: center;
    }
}

.result-sound-group {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 1.1rem;
    margin-bottom: 2px;
}

.sound-play-icon {
    background: var(--secondary);
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s;
    font-size: 1.1rem;
    box-shadow: 0 1px 2px rgba(0,0,0,0.04);
    padding: 0;
}

.sound-play-icon:hover, .sound-play-icon:focus {
    background: var(--secondary-light);
    outline: none;
}

.ipa-text {
    font-family: 'Noto Sans', 'Arial', sans-serif;
    font-size: 1.1rem;
    color: var(--text);
    letter-spacing: 0.01em;
    padding-left: 2px;
}

.ipa-sound-btn {
    background: var(--secondary);
    color: #fff;
    border: none;
    border-radius: 999px;
    padding: 0.35em 1.1em;
    font-size: 1.1rem;
    font-family: 'Noto Sans', 'Arial', sans-serif;
    font-weight: 600;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s;
    box-shadow: 0 1px 2px rgba(0,0,0,0.04);
    display: inline-flex;
    align-items: center;
    line-height: 1.2;
    outline: none;
}

.ipa-sound-btn:hover, .ipa-sound-btn:focus {
    background: var(--secondary-light);
}

.result-item.incorrect .ipa-sound-btn {
    background: rgb(244, 63, 94);
    color: #fff;
}

.result-item.incorrect .ipa-sound-btn:hover,
.result-item.incorrect .ipa-sound-btn:focus {
    background: #fb7185;
    color: #fff;
}

/* Activity cards by type instead of position */
.activity-card-literature {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    padding: 0;
    overflow: hidden;
    background: var(--surface);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.activity-card-literature .activity-image {
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    background-color: var(--surface);
    width: 100%;
    height: 100%;
    min-height: 400px;
}

.activity-card-literature .activity-content {
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.activity-card-literature .activity-title {
    font-size: 2.25rem;
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

.activity-card-literature .activity-description {
    font-size: 1.125rem;
    margin-bottom: var(--space-lg);
    color: var(--text-light);
    max-width: 40ch;
}

.activity-card-literature .activity-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    max-width: 300px;
}

.activity-card-literature .activity-link {
    width: 100%;
    justify-content: center;
    padding: var(--space-md) var(--space-lg);
}

@media (max-width: 768px) {
    .activity-card-literature {
        grid-template-columns: 1fr;
    }
    
    .activity-card-literature .activity-image {
        height: 200px;
        min-height: auto;
    }
    
    .activity-card-literature .activity-content {
        padding: var(--space-xl);
    }
    
    .activity-card-literature .activity-title {
        font-size: 2rem;
    }
    
    .activity-card-literature .activity-links {
        max-width: 100%;
    }
}

/* Specific styling for the second-to-last literature card in lesson-45 */
.literature-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    padding: 0;
    overflow: hidden;
    background: var(--surface);
}

.literature-grid .activity-image {
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    background-color: var(--surface);
    width: 100%;
    height: 100%;
    min-height: 400px;
}

.literature-grid .activity-content {
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.literature-grid .activity-title {
    font-size: 2.25rem;
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

.literature-grid .activity-description {
    font-size: 1.125rem;
    margin-bottom: var(--space-lg);
    color: var(--text-light);
    max-width: 40ch;
}

.literature-grid .activity-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    max-width: 300px;
}

.literature-grid .activity-link {
    width: 100%;
    justify-content: center;
    padding: var(--space-md) var(--space-lg);
}

@media (max-width: 768px) {
    .literature-grid {
        grid-template-columns: 1fr;
    }
    
    .literature-grid .activity-image {
        height: 200px;
        min-height: auto;
    }
    
    .literature-grid .activity-content {
        padding: var(--space-xl);
    }
    
    .literature-grid .activity-title {
        font-size: 2rem;
    }
    
    .literature-grid .activity-links {
        max-width: 100%;
    }
}

.activity-card-literature .activity-image img,
.literature-grid .activity-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    background: var(--surface);
}