/**
 * Styles for Kathmandu Interactive English Lesson
 */

/* Base Styles and Typography */
:root {
    --primary-color: #3a86ff;
    --secondary-color: #8338ec;
    --accent-color: #ffbe0b;
    --background-color: #f8f9fa;
    --text-color: #212529;
    --light-text: #6c757d;
    --success-color: #2a9d8f;
    --warning-color: #ff9e00;
    --error-color: #e63946;
    --border-color: #dee2e6;
    --card-bg: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --border-radius: 8px;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    max-width: 100vw;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    margin-bottom: 0.75rem;
    line-height: 1.2;
    font-weight: 600;
    color: var(--text-color);
}

p {
    margin-bottom: 1rem;
}

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

a:hover {
    text-decoration: underline;
    color: var(--secondary-color);
}

/* Layout */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.header {
    text-align: center;
    padding: 2rem 0;
    margin-bottom: 1.5rem;
    position: relative;
}

.title {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.5rem;
    color: var(--light-text);
    margin-bottom: 0.5rem;
}

.reprint {
    font-size: 0.875rem;
    color: var(--light-text);
}

/* Navigation */
.nav-menu {
    background-color: var(--primary-color);
    padding: 0.75rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.nav-items {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
}

.nav-item {
    background: none;
    border: none;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-item:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.nav-item.active {
    background-color: white;
    color: var(--primary-color);
    font-weight: 600;
}

/* Audio Control */
.audio-control {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
}

.audio-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.audio-btn.muted {
    background-color: var(--light-text);
}

/* Achievement Popup */
.achievement-popup {
    position: fixed;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 1rem;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    z-index: 1100;
    width: 90%;
    max-width: 350px;
}

.achievement-popup.show {
    top: 20px;
}

.achievement-title {
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.achievement-desc {
    font-size: 0.9rem;
}

/* Progress Tracker */
.progress-container {
    margin-bottom: 2rem;
    background-color: var(--card-bg);
    padding: 1rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.progress-bar {
    height: 20px;
    background-color: #e9ecef;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-fill {
    height: 100%;
    background-color: var(--primary-color);
    text-align: center;
    color: white;
    font-size: 0.75rem;
    line-height: 20px;
    transition: width 0.5s ease;
}

.progress-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--light-text);
}

/* Modules */
.module {
    display: none;
}

.module.active {
    display: block;
}

/* Exercise Cards */
.exercise-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    overflow: hidden;
}

.exercise-title {
    padding: 1.5rem;
    background-color: var(--primary-color);
    color: white;
    margin-bottom: 0;
    display: flex;
    align-items: center;
}

.exercise-icon {
    margin-right: 0.75rem;
    font-size: 1.25rem;
}

.content-block {
    padding: 1.5rem;
}

.activity-title {
    padding: 1rem 1.5rem;
    background-color: rgba(58, 134, 255, 0.1);
    color: var(--primary-color);
    margin: 0;
}

/* Story Reader */
.story-reader {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    overflow: hidden;
}

.section-title {
    padding: 1.5rem;
    background-color: var(--primary-color);
    color: white;
    margin-bottom: 0;
    text-align: center;
}

.story-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 1rem;
    background-color: #f1f3f5;
    justify-content: center;
}

.reading-mode-btn {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.reading-mode-btn:hover {
    background-color: var(--primary-color);
    color: white;
}

.story-navigation {
    display: flex;
    padding: 1rem;
    background-color: #f1f3f5;
    border-top: 1px solid var(--border-color);
    justify-content: center;
    gap: 0.5rem;
}

.story-nav-btn {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.story-nav-btn:hover {
    background-color: var(--primary-color);
    color: white;
}

.story-nav-btn.active {
    background-color: var(--primary-color);
    color: white;
    font-weight: 500;
}

.story-content {
    padding: 1.5rem;
    min-height: 300px;
}

.story-part {
    display: none;
}

.story-part.active {
    display: block;
}

.story-part-title {
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

/* Interactive Components */
.interactive-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: 0.75rem 1.25rem;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 1rem;
    display: inline-block;
}

.interactive-btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

.button-container {
    text-align: center;
    padding: 1.5rem;
}

/* Reflection Exercise */
.reflection-exercise {
    padding: 1.5rem;
}

textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    resize: vertical;
    font-family: inherit;
    font-size: 1rem;
}

.feedback-message {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    display: none;
}

.feedback-message.show {
    display: block;
}

.feedback-message.success {
    background-color: rgba(42, 157, 143, 0.1);
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.feedback-message.warning {
    background-color: rgba(255, 158, 0, 0.1);
    color: var(--warning-color);
    border: 1px solid var(--warning-color);
}

.feedback-message.error {
    background-color: rgba(230, 57, 70, 0.1);
    color: var(--error-color);
    border: 1px solid var(--error-color);
}

/* Vocabulary and Grammar Exercises */
.vocabulary-exercise, .suffix-exercise, .editing-exercise {
    padding: 1.5rem;
}

.vocab-question, .suffix-item, .contraction-item, .editing-row {
    margin-bottom: 1rem;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: #f8f9fa;
}

.vocab-question select, .suffix-input, .suffix-input-2, .contraction-input, .editing-input {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: inherit;
    margin: 0 0.25rem;
}

.correct {
    border-color: var(--success-color);
    background-color: rgba(42, 157, 143, 0.1);
}

.incorrect {
    border-color: var(--error-color);
    background-color: rgba(230, 57, 70, 0.1);
}

/* Matching Game */
.matching-game {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.match-column h3 {
    text-align: center;
    margin-bottom: 1rem;
}

.match-item {
    padding: 0.75rem;
    margin-bottom: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: #f8f9fa;
    cursor: pointer;
    transition: var(--transition);
}

.match-item:hover {
    background-color: #e9ecef;
}

.match-item.selected-term {
    background-color: rgba(58, 134, 255, 0.2);
    border-color: var(--primary-color);
}

.match-item.selected-def {
    background-color: rgba(131, 56, 236, 0.2);
    border-color: var(--secondary-color);
}

.match-item.matched {
    background-color: rgba(42, 157, 143, 0.2);
    border-color: var(--success-color);
    cursor: default;
}

/* Grammar Passage */
.grammar-passage {
    background-color: #f8f9fa;
    padding: 1.5rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    line-height: 1.8;
}

.editing-text {
    background-color: #f8f9fa;
    padding: 1.5rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    line-height: 1.8;
}

.error-word {
    color: var(--error-color);
    text-decoration: underline;
    cursor: pointer;
}

.editing-answers-grid {
    display: grid;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

/* Activities Section */
.activity-section {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.activity-section:last-child {
    border-bottom: none;
}

.activity-section h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.listening-notes, .writing-pad {
    margin-top: 1.5rem;
}

.listening-questions {
    margin-top: 1.5rem;
}

.question-item {
    margin-bottom: 1.5rem;
}

.project-resources {
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: #f8f9fa;
    border-radius: var(--border-radius);
}

.project-resources h4 {
    margin-bottom: 0.75rem;
}

.project-resources ul {
    list-style-type: none;
    padding-left: 0;
}

.project-resources li {
    margin-bottom: 0.5rem;
}

/* Fun Facts */
.fun-facts {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: #f8f9fa;
    border-radius: var(--border-radius);
}

.fun-facts h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
    text-align: center;
}

.fun-fact-item {
    margin-bottom: 1rem;
    padding: 0.75rem;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.fun-fact-item h4 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

/* Reading Indicator */
.reading-indicator {
    display: flex;
    align-items: center;
    margin-top: 1rem;
    padding: 0.75rem;
    background-color: rgba(58, 134, 255, 0.1);
    border-radius: var(--border-radius);
    color: var(--primary-color);
    gap: 0.5rem;
    animation: fadeIn 0.5s ease;
}

.reading-spinner {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(58, 134, 255, 0.3);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.stop-narration-btn {
    margin-left: auto;
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
    background-color: white;
    color: var(--primary-color);
    border: 1px solid currentColor;
}

.stop-narration-btn:hover {
    background-color: var(--error-color);
    color: white;
    border-color: var(--error-color);
}

.fade-out {
    animation: fadeOut 0.5s ease;
    opacity: 0;
}

/* Paragraph Highlight */
.paragraph-highlight {
    background-color: rgba(255, 190, 11, 0.2);
    border-radius: var(--border-radius);
    padding: 0.25rem;
    transition: background-color 0.3s ease;
}

/* Vocabulary Highlighting */
.highlight-vocab {
    position: relative;
    cursor: pointer;
    border-bottom: 1px dotted var(--primary-color);
}

.highlight-vocab .vocab-tooltip {
    display: none;
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--primary-color);
    color: white;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    width: max-content;
    max-width: 200px;
    z-index: 100;
}

.highlight-vocab:hover .vocab-tooltip {
    display: block;
}

.active-highlight {
    background-color: rgba(255, 190, 11, 0.3);
    border-bottom: none;
    padding: 0.1rem 0.25rem;
    border-radius: 2px;
}

/* Vocabulary Notes */
.vocabulary-note {
    display: none;
}

/* Comprehension Check */
.comprehension-check {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: #f8f9fa;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
}

.comprehension-check h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.comprehension-question {
    margin-bottom: 0.75rem;
    font-weight: 500;
}

.comprehension-options {
    margin-left: 1.5rem;
    margin-bottom: 1.5rem;
}

.option {
    margin-bottom: 0.5rem;
}

/* Print Mode */
.print-mode .nav-menu, 
.print-mode .audio-control,
.print-mode .progress-container,
.print-mode .button-container,
.print-mode .story-controls,
.print-mode .interactive-btn,
.print-mode footer {
    display: none;
}

.print-mode .container {
    width: 100%;
    max-width: none;
    padding: 0;
}

.print-mode .story-content {
    padding: 2cm;
}

.print-mode .vocabulary-note {
    display: block;
    margin-bottom: 1rem;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}

.print-mode .vocabulary-note .word {
    font-weight: 700;
}

.print-mode .vocabulary-note .definition {
    font-style: italic;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--light-text);
    font-size: 0.875rem;
}

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

@keyframes fadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Responsive Styles */
@media (max-width: 768px) {
    .nav-items {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-item {
        width: 100%;
        text-align: center;
    }
    
    .matching-game {
        grid-template-columns: 1fr;
    }
    
    .title {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1.25rem;
    }
}

/* Accessibility Focus Styles */
:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}.clickable {
    cursor: pointer;
    transition: transform 0.2s ease;
}

.clickable:hover {
    transform: translateY(-2px);
}