@import url('https://fonts.googleapis.com/css2?family=Fredoka:wght@300..700&display=swap');

:root {
    --bg-app: #F0F4F8;
    --bg-card: #FFFFFF;
    --text-primary: #2C3E50;
    --text-secondary: #7F8C8D;
    
    /* Branding Core Palette */
    --color-primary: #6C5CE7;
    --color-primary-light: #ECE9FC;
    --color-primary-hover: #5A4AD1;
    
    /* Sub-resource Themes */
    --color-audio: #00A8B5;      /* Teal/Blue */
    --color-audio-light: #E0F7F8;
    
    --color-print: #F25C05;      /* Orange/Red */
    --color-print-light: #FFEFE5;
    
    --color-ebook: #8CC63F;      /* Green */
    --color-ebook-light: #F0F9E6;
    
    --color-yellow: #FFD200;
    --color-yellow-light: #FFF9E0;
    --color-red: #FF7675;
    
    /* System Borders and Radius */
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    --border-radius-pill: 50px;
    --transition-speed: 0.3s;
    --shadow-soft: 0 10px 30px rgba(108, 92, 231, 0.08);
    --shadow-medium: 0 15px 35px rgba(44, 62, 80, 0.12);
}

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

body {
    font-family: 'Fredoka', sans-serif;
    background-color: var(--bg-app);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Header & Navigation */
header {
    background-color: var(--bg-card);
    padding: 15px 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
}

.logo-img {
    animation: bounce 2s infinite ease-in-out;
}

.logo-icon {
    font-size: 32px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-audio));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: bounce 2s infinite ease-in-out;
}

.nav-links {
    display: flex;
    gap: 15px;
    list-style: none;
}

.nav-item {
    padding: 10px 20px;
    border-radius: var(--border-radius-pill);
    color: var(--text-primary);
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    transition: all var(--transition-speed) ease;
    cursor: pointer;
}

.nav-item:hover {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.nav-item.active {
    background-color: var(--color-primary);
    color: #FFFFFF;
    box-shadow: 0 4px 15px rgba(108, 92, 231, 0.3);
}

/* View Containers */
main {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 30px 20px;
}

.view-section {
    display: none;
    animation: fadeIn 0.4s ease-in-out forwards;
}

.view-section.active {
    display: block;
}

/* Hero Section */
.hero-container {
    background: linear-gradient(135deg, #FFEAA7, #FFAD55);
    border-radius: var(--border-radius-lg);
    padding: 60px 40px;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-soft);
    position: relative;
    overflow: hidden;
}

.hero-content {
    flex: 1;
    max-width: 600px;
    z-index: 2;
}

.hero-badge {
    background-color: #FFFFFF;
    color: #F25C05;
    padding: 8px 16px;
    border-radius: var(--border-radius-pill);
    font-size: 14px;
    font-weight: 700;
    display: inline-block;
    margin-bottom: 20px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    color: #2D3436;
    margin-bottom: 20px;
}

.hero-desc {
    font-size: 18px;
    color: #57606F;
    line-height: 1.6;
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
}

.btn {
    padding: 14px 28px;
    border-radius: var(--border-radius-pill);
    font-size: 18px;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: all var(--transition-speed) cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-4px) scale(1.02);
}

.btn:active {
    transform: translateY(1px);
}

.btn-primary {
    background-color: var(--color-primary);
    color: #FFFFFF;
    box-shadow: 0 8px 20px rgba(108, 92, 231, 0.35);
}

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

.btn-secondary {
    background-color: #FFFFFF;
    color: var(--text-primary);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
}

.hero-graphic {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-circle-art {
    width: 320px;
    height: 320px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.4);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 160px;
    animation: float 4s infinite ease-in-out;
}

/* Stats Ribbon */
.stats-ribbon {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 50px;
}

.stat-card {
    background-color: var(--bg-card);
    border-radius: var(--border-radius-md);
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow-soft);
    border: 2px solid transparent;
    transition: all var(--transition-speed) ease;
}

.stat-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-primary-light);
}

.stat-card.audio-theme:hover { border-color: var(--color-audio-light); }
.stat-card.print-theme:hover { border-color: var(--color-print-light); }
.stat-card.ebook-theme:hover { border-color: var(--color-ebook-light); }

.stat-icon {
    font-size: 40px;
    margin-bottom: 12px;
    display: inline-block;
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.stat-card.audio-theme .stat-value { color: var(--color-audio); }
.stat-card.print-theme .stat-value { color: var(--color-print); }
.stat-card.ebook-theme .stat-value { color: var(--color-ebook); }

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 600;
}

/* Section Header */
.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-tag {
    color: var(--color-primary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-size: 14px;
    margin-bottom: 10px;
    display: block;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
}

/* Quick Start / Alphabet Lessons Tab Layout */
.lessons-tabs-container {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.lessons-tabs-nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 10px;
}

.tab-btn {
    padding: 12px 24px;
    border-radius: var(--border-radius-pill);
    font-family: 'Fredoka', sans-serif;
    font-size: 16px;
    font-weight: 600;
    border: 2px solid transparent;
    background-color: var(--bg-card);
    color: var(--text-primary);
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0,0,0,0.02);
    transition: all var(--transition-speed) ease;
}

.tab-btn:hover {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.tab-btn.active {
    background-color: var(--color-primary);
    color: #FFFFFF;
    box-shadow: 0 6px 15px rgba(108, 92, 231, 0.25);
}

.lesson-panel {
    display: none;
}

.lesson-panel.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

.lesson-meta {
    background-color: var(--bg-card);
    border-radius: var(--border-radius-md);
    padding: 20px 30px;
    margin-bottom: 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-soft);
}

.lesson-info h3 {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.lesson-info p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Phoneme Cards Grid */
.phoneme-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 20px;
}

.phoneme-card {
    background-color: var(--bg-card);
    border-radius: var(--border-radius-md);
    padding: 30px 20px;
    text-align: center;
    box-shadow: var(--shadow-soft);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 3px solid transparent;
    position: relative;
    overflow: hidden;
}

.phoneme-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-medium);
    border-color: var(--color-primary-light);
}

.phoneme-letter {
    font-size: 42px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 10px;
}

.phoneme-card:nth-child(even) .phoneme-letter {
    color: var(--color-audio);
}

.phoneme-card:nth-child(3n) .phoneme-letter {
    color: var(--color-print);
}

.phoneme-card:nth-child(4n) .phoneme-letter {
    color: var(--color-ebook);
}

.phoneme-keyword {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 600;
}

.phoneme-tag {
    position: absolute;
    top: 8px;
    right: 8px;
    font-size: 16px;
}

/* Phoneme Hub Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(44, 62, 80, 0.55);
    backdrop-filter: blur(8px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 20px;
}

.modal-overlay.active {
    display: flex;
}

.modal-container {
    background-color: var(--bg-card);
    width: 100%;
    max-width: 900px;
    height: 90%;
    max-height: 700px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-medium);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: scaleUp 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.modal-header {
    background-color: var(--bg-app);
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid rgba(0, 0, 0, 0.05);
}

.modal-title-area {
    display: flex;
    align-items: center;
    gap: 15px;
}

.modal-letter-badge {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    background-color: var(--color-primary);
    color: #FFFFFF;
    font-size: 28px;
    font-weight: 700;
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-title h2 {
    font-size: 24px;
    font-weight: 700;
}

.modal-title p {
    font-size: 13px;
    color: var(--text-secondary);
}

.modal-close-btn {
    background: none;
    border: none;
    font-size: 28px;
    color: var(--text-secondary);
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background-color 0.2s;
}

.modal-close-btn:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

/* Modal Sub-tabs */
.modal-nav {
    display: flex;
    background-color: #F8FAFC;
    border-bottom: 2px solid rgba(0, 0, 0, 0.05);
}

.modal-nav-btn {
    flex: 1;
    padding: 16px;
    border: none;
    background: none;
    font-family: 'Fredoka', sans-serif;
    font-size: 16px;
    font-weight: 700;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    transition: all var(--transition-speed);
}

.modal-nav-btn:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

.modal-nav-btn.active[data-tab="soundcard"] {
    color: var(--color-audio);
    border-bottom: 4px solid var(--color-audio);
    background-color: #FFFFFF;
}

.modal-nav-btn.active[data-tab="trace"] {
    color: var(--color-print);
    border-bottom: 4px solid var(--color-print);
    background-color: #FFFFFF;
}

.modal-nav-btn.active[data-tab="ebook"] {
    color: var(--color-ebook);
    border-bottom: 4px solid var(--color-ebook);
    background-color: #FFFFFF;
}

.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 30px;
    position: relative;
    background-color: #FFFFFF;
}

.modal-tab-content {
    display: none;
    height: 100%;
}

.modal-tab-content.active {
    display: block;
}

/* Soundcard Carousel View */
.soundcard-view {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    position: relative;
}

.soundcard-carousel {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 550px;
    margin-bottom: 20px;
}

.carousel-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--color-audio-light);
    border: none;
    color: var(--color-audio);
    font-size: 20px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: all 0.2s ease;
}

.carousel-btn:hover {
    background-color: var(--color-audio);
    color: #FFFFFF;
}

.carousel-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.carousel-card {
    background: linear-gradient(135deg, var(--color-audio-light), #FFFFFF);
    border: 4px solid var(--color-audio);
    border-radius: var(--border-radius-lg);
    width: 320px;
    height: 280px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-shadow: var(--shadow-medium);
    transition: transform 0.3s ease;
    cursor: pointer;
    text-align: center;
    padding: 20px;
}

.carousel-card:hover {
    transform: scale(1.03);
}

.carousel-card-emoji {
    font-size: 100px;
    margin-bottom: 15px;
    filter: drop-shadow(0px 8px 12px rgba(0,0,0,0.1));
}

.carousel-card-word {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

.carousel-card-word span.highlight {
    color: var(--color-audio);
    text-decoration: underline;
}

.audio-controls-row {
    display: flex;
    gap: 15px;
    align-items: center;
    margin-bottom: 20px;
}

.audio-play-trigger {
    background-color: var(--color-audio);
    color: #FFFFFF;
    border: none;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 15px rgba(0, 168, 181, 0.35);
    transition: all 0.2s;
}

.audio-play-trigger:hover {
    background-color: #008E9B;
    transform: scale(1.08);
}

.carousel-dots {
    display: flex;
    gap: 8px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: #E2E8F0;
    cursor: pointer;
    transition: all 0.2s;
}

.dot.active {
    background-color: var(--color-audio);
    width: 24px;
    border-radius: var(--border-radius-pill);
}

/* Trace Canvas View */
.trace-view {
    display: grid;
    grid-template-columns: 1fr 180px;
    gap: 20px;
    height: 100%;
}

.canvas-container {
    background-color: #F8FAFC;
    border: 3px dashed var(--color-print);
    border-radius: var(--border-radius-md);
    position: relative;
    overflow: hidden;
    height: 100%;
    min-height: 320px;
    display: flex;
    justify-content: center;
    align-items: center;
}

#traceCanvas {
    background-color: transparent;
    cursor: crosshair;
    width: 100%;
    height: 100%;
    z-index: 2;
}

.canvas-guide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    pointer-events: none;
    z-index: 1;
}

.canvas-letter-hint {
    font-size: 240px;
    font-weight: 700;
    color: rgba(242, 92, 5, 0.08);
    user-select: none;
}

.canvas-horizontal-guide {
    position: absolute;
    width: 100%;
    height: 2px;
    border-top: 2px dashed rgba(242, 92, 5, 0.15);
    top: 50%;
    left: 0;
}

.trace-controls {
    display: flex;
    flex-direction: column;
    gap: 15px;
    justify-content: flex-start;
}

.control-group {
    background-color: #F8FAFC;
    padding: 15px;
    border-radius: var(--border-radius-md);
    border: 1px solid #E2E8F0;
}

.control-group-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 10px;
    text-transform: uppercase;
}

.color-palette {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.color-option {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 3px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
}

.color-option.active {
    border-color: #2C3E50;
    transform: scale(1.1);
}

.brush-sizes {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.brush-btn {
    padding: 8px;
    border-radius: var(--border-radius-sm);
    border: 1px solid #CBD5E1;
    background-color: #FFFFFF;
    font-family: 'Fredoka', sans-serif;
    font-weight: 600;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s;
}

.brush-btn:hover {
    background-color: var(--color-print-light);
}

.brush-btn.active {
    background-color: var(--color-print);
    color: #FFFFFF;
    border-color: var(--color-print);
}

.canvas-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.canvas-btn {
    padding: 10px 16px;
    border-radius: var(--border-radius-pill);
    font-family: 'Fredoka', sans-serif;
    font-weight: 700;
    font-size: 14px;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
}

.canvas-btn-clear {
    background-color: #FEE2E2;
    color: #EF4444;
}

.canvas-btn-clear:hover {
    background-color: #FCA5A5;
}

.canvas-btn-undo {
    background-color: #E2E8F0;
    color: #475569;
}

.canvas-btn-undo:hover {
    background-color: #CBD5E1;
}

.canvas-btn-download {
    background-color: var(--color-print-light);
    color: var(--color-print);
}

.canvas-btn-download:hover {
    background-color: var(--color-print);
    color: #FFFFFF;
}

/* eBook View */
.ebook-view {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 10px;
}

.ebook-reader {
    background: linear-gradient(to right, #FCFBF7 0%, #FFFFFF 6%, #FFFFFF 94%, #FCFBF7 100%);
    border: 3px solid var(--color-ebook);
    border-radius: var(--border-radius-md);
    box-shadow: 0 10px 25px rgba(0,0,0,0.06);
    width: 100%;
    max-width: 600px;
    height: 330px;
    padding: 30px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
}

.ebook-page-art {
    font-size: 90px;
    margin-bottom: 20px;
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.05));
}

.ebook-text {
    font-size: 24px;
    line-height: 1.6;
    color: var(--text-primary);
    font-weight: 500;
}

.ebook-text span.highlight-phoneme {
    color: var(--color-ebook);
    font-weight: 700;
    text-decoration: underline;
}

.ebook-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 500px;
    margin-top: 20px;
}

.ebook-btn {
    padding: 10px 20px;
    border-radius: var(--border-radius-pill);
    border: none;
    font-family: 'Fredoka', sans-serif;
    font-weight: 700;
    font-size: 15px;
    cursor: pointer;
    transition: all 0.2s;
}

.ebook-btn-prev {
    background-color: var(--color-ebook-light);
    color: var(--color-ebook);
}

.ebook-btn-next {
    background-color: var(--color-ebook);
    color: #FFFFFF;
}

.ebook-btn:hover {
    transform: scale(1.04);
}

.ebook-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    transform: none;
}

.ebook-page-indicator {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 15px;
}

/* CVC Word Builder Game View */
.game-container {
    background-color: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-medium);
    padding: 30px;
    max-width: 800px;
    margin: 0 auto;
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid #F1F5F9;
    padding-bottom: 15px;
    margin-bottom: 25px;
}

.game-level-tabs {
    display: flex;
    gap: 8px;
}

.level-btn {
    padding: 8px 16px;
    border-radius: var(--border-radius-pill);
    border: 2px solid #E2E8F0;
    background: none;
    font-family: 'Fredoka', sans-serif;
    font-weight: 700;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.level-btn:hover {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    border-color: var(--color-primary-light);
}

.level-btn.active {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: #FFFFFF;
}

.game-stats {
    display: flex;
    gap: 20px;
    align-items: center;
}

.game-stat-badge {
    background-color: #F8FAFC;
    padding: 6px 14px;
    border-radius: var(--border-radius-pill);
    font-weight: 700;
    font-size: 14px;
    border: 1px solid #E2E8F0;
}

.game-stat-badge span {
    color: var(--color-primary);
}

.game-play-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 250px;
}

.game-word-art {
    font-size: 120px;
    margin-bottom: 20px;
    filter: drop-shadow(0 8px 16px rgba(0,0,0,0.08));
    animation: float 3s infinite ease-in-out;
}

.game-letter-slots {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
}

.letter-slot {
    width: 65px;
    height: 65px;
    border-radius: var(--border-radius-md);
    border: 3px dashed #CBD5E1;
    background-color: #F8FAFC;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.letter-slot.filled {
    border-style: solid;
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.letter-slot.correct {
    border-color: var(--color-ebook);
    background-color: var(--color-ebook-light);
    color: var(--color-ebook);
}

.game-choices-pool {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    min-height: 80px;
}

.bubble-letter {
    width: 58px;
    height: 58px;
    border-radius: 50%;
    background-color: #FFEAA7;
    border: 3px solid #F5B041;
    color: #D35400;
    font-size: 26px;
    font-weight: 700;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    box-shadow: 0 4px 8px rgba(0,0,0,0.08);
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    user-select: none;
    animation: bubbleFloat 4s infinite ease-in-out alternate;
}

.bubble-letter:hover {
    transform: scale(1.1) translateY(-3px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.12);
}

.bubble-letter:nth-child(even) {
    animation-delay: 0.5s;
    background-color: #DFF9FB;
    border-color: #22A6B3;
    color: #0A7E8C;
}

.bubble-letter:nth-child(3n) {
    animation-delay: 1s;
    background-color: #E8F8F5;
    border-color: #1ABC9C;
    color: #117A65;
}

.bubble-feedback-message {
    font-size: 22px;
    font-weight: 700;
    min-height: 35px;
    margin-top: 15px;
}

.bubble-feedback-message.correct {
    color: var(--color-ebook);
}

.bubble-feedback-message.incorrect {
    color: var(--color-red);
}

/* Printable Worksheets Screen */
.printables-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 30px;
}

.printables-sidebar {
    background-color: var(--bg-card);
    border-radius: var(--border-radius-md);
    padding: 24px;
    box-shadow: var(--shadow-soft);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.sidebar-heading {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    border-bottom: 2px solid #F1F5F9;
    padding-bottom: 10px;
}

.worksheet-select-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.worksheet-option-btn {
    padding: 12px 16px;
    border-radius: var(--border-radius-sm);
    border: 1px solid #E2E8F0;
    background-color: #FFFFFF;
    font-family: 'Fredoka', sans-serif;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 10px;
}

.worksheet-option-btn:hover {
    background-color: var(--color-print-light);
    color: var(--color-print);
}

.worksheet-option-btn.active {
    background-color: var(--color-print);
    color: #FFFFFF;
    border-color: var(--color-print);
}

.printable-viewer-container {
    background-color: var(--bg-card);
    border-radius: var(--border-radius-md);
    padding: 40px;
    box-shadow: var(--shadow-soft);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.printable-paper {
    width: 100%;
    max-width: 595px; /* A4 Ratio Width */
    min-height: 750px;
    border: 1px solid #E2E8F0;
    background-color: #FFFFFF;
    padding: 40px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.02);
    position: relative;
    overflow: hidden;
}

/* Inner worksheet graphics styling */
.worksheet-header {
    border-bottom: 3px solid var(--text-primary);
    padding-bottom: 15px;
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.worksheet-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.worksheet-student-info {
    font-size: 14px;
    color: var(--text-secondary);
    display: flex;
    gap: 20px;
}

.worksheet-field-line {
    border-bottom: 1px solid #94A3B8;
    width: 120px;
    display: inline-block;
    height: 15px;
}

.worksheet-instruction {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 25px;
    color: #475569;
}

/* Handwriting template lines */
.worksheet-trace-block {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 35px;
}

.worksheet-trace-row {
    display: flex;
    align-items: center;
    gap: 20px;
}

.worksheet-trace-letter-box {
    width: 60px;
    height: 60px;
    border: 2px solid #CBD5E1;
    border-radius: var(--border-radius-sm);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 36px;
    font-weight: 600;
}

.worksheet-four-lines-container {
    flex: 1;
    height: 60px;
    position: relative;
    border-top: 1px solid #CBD5E1;
    border-bottom: 1px solid #CBD5E1;
}

.worksheet-dashed-line-middle-1 {
    position: absolute;
    width: 100%;
    height: 0;
    border-top: 1px dashed #94A3B8;
    top: 33.3%;
}

.worksheet-dashed-line-middle-2 {
    position: absolute;
    width: 100%;
    height: 0;
    border-top: 1px dashed #94A3B8;
    top: 66.6%;
}

.worksheet-trace-letters-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    padding-left: 20px;
    gap: 40px;
    font-size: 32px;
    color: #CBD5E1; /* Light grey trace letters */
    font-weight: 500;
    letter-spacing: 20px;
}

/* Matching worksheet style */
.worksheet-match-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 20px;
}

.match-column {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.match-item {
    border: 2px solid #CBD5E1;
    border-radius: var(--border-radius-md);
    padding: 15px;
    text-align: center;
    font-size: 24px;
    font-weight: 600;
    height: 80px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.match-item.emoji-item {
    font-size: 40px;
    background-color: #F8FAFC;
}

/* About / Phonics Explanation page */
.about-card {
    background-color: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-soft);
    margin-bottom: 30px;
}

.about-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    border-left: 5px solid var(--color-primary);
    padding-left: 15px;
}

.about-p {
    font-size: 16px;
    line-height: 1.8;
    color: #475569;
    margin-bottom: 20px;
}

.about-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.about-feature {
    background-color: #F8FAFC;
    border-radius: var(--border-radius-md);
    padding: 24px;
    border: 1px solid #E2E8F0;
}

.about-feature-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Footer Section */
footer {
    background-color: var(--bg-card);
    padding: 30px 40px;
    text-align: center;
    border-top: 1px solid #E2E8F0;
    margin-top: 50px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 15px;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: color 0.2s;
    cursor: pointer;
}

.footer-link:hover {
    color: var(--color-primary);
}

.footer-text {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes scaleUp {
    from { opacity: 0; transform: scale(0.92); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
}

@keyframes bubbleFloat {
    0% { transform: translateY(0px) rotate(0deg); }
    100% { transform: translateY(-8px) rotate(3deg); }
}

/* Media Queries */
@media (max-width: 992px) {
    .hero-container {
        flex-direction: column;
        padding: 40px 30px;
        gap: 30px;
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .stats-ribbon {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .printables-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    header {
        flex-direction: column;
        gap: 15px;
        padding: 15px;
    }
    
    .nav-links {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .nav-item {
        padding: 8px 12px;
        font-size: 14px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .stats-ribbon {
        grid-template-columns: 1fr;
    }
    
    .trace-view {
        grid-template-columns: 1fr;
    }
    
    .trace-controls {
        flex-direction: row;
        flex-wrap: wrap;
    }
}

/* Print Styling */
@media print {
    body, main {
        background-color: #FFFFFF !important;
        color: #000000 !important;
        margin: 0 !important;
        padding: 0 !important;
        width: 100% !important;
    }
    
    header, footer, .nav-links, .btn, .lessons-tabs-nav, .printables-sidebar, .sidebar-heading, .canvas-actions, .canvas-btn, .printable-viewer-container button {
        display: none !important;
    }
    
    .printable-viewer-container {
        padding: 0 !important;
        box-shadow: none !important;
        border: none !important;
        background-color: transparent !important;
    }
    
    .printable-paper {
        border: none !important;
        padding: 0 !important;
        box-shadow: none !important;
        width: 100% !important;
        max-width: 100% !important;
        min-height: auto !important;
    }
    
    .worksheet-trace-letters-overlay {
        color: #D1D5DB !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
}

/* Games Hub Selection View */
.games-hub-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 20px;
}

.game-hub-card {
    background-color: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: 40px 30px;
    text-align: center;
    box-shadow: var(--shadow-soft);
    border: 3px solid transparent;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.game-hub-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-medium);
}

.game-hub-card.speller:hover {
    border-color: var(--color-primary-light);
}

.game-hub-card.popper:hover {
    border-color: var(--color-audio-light);
}

.game-hub-icon {
    font-size: 80px;
    margin-bottom: 20px;
    display: inline-block;
    animation: float 3s infinite ease-in-out;
}

.game-hub-card.popper .game-hub-icon {
    animation-delay: 0.5s;
}

.game-hub-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
}

.game-hub-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 25px;
}

/* Balloon Pop Game Styles */
.balloon-game-container {
    background-color: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-medium);
    padding: 30px;
    max-width: 800px;
    margin: 0 auto;
}

.balloon-sky {
    background: linear-gradient(to bottom, #DFF9FB, #E0F7F8);
    height: 480px;
    width: 100%;
    border-radius: var(--border-radius-md);
    position: relative;
    overflow: hidden;
    border: 4px solid var(--color-audio);
    margin-bottom: 20px;
    box-shadow: inset 0 10px 20px rgba(0,0,0,0.03);
}

.balloon-sky-clouds {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    opacity: 0.4;
}

.sky-cloud {
    position: absolute;
    font-size: 50px;
}

.balloon-ground {
    position: absolute;
    bottom: -10px;
    width: 100%;
    height: 40px;
    background-color: #7BE382;
    border-radius: 50% 50% 0 0 / 100% 100% 0 0;
    z-index: 2;
    pointer-events: none;
}

.balloon {
    position: absolute;
    width: 70px;
    height: 85px;
    border-radius: 50% 50% 50% 50% / 40% 40% 60% 60%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #FFFFFF;
    font-size: 32px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: inset -5px -8px 15px rgba(0, 0, 0, 0.15), 0 6px 12px rgba(0, 0, 0, 0.08);
    z-index: 5;
    user-select: none;
    transition: transform 0.15s ease;
}

.balloon::after {
    content: "";
    position: absolute;
    bottom: -8px;
    left: 31px;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-bottom: 8px solid currentColor;
}

.balloon-string {
    position: absolute;
    bottom: -32px;
    left: 34px;
    width: 2px;
    height: 25px;
    background-color: rgba(0, 0, 0, 0.2);
}

/* Balloon gradients */
.balloon-color-1 { background: radial-gradient(circle at 30% 30%, #FF7675, #D63031); color: #FFF; }
.balloon-color-2 { background: radial-gradient(circle at 30% 30%, #74B9FF, #0984E3); color: #FFF; }
.balloon-color-3 { background: radial-gradient(circle at 30% 30%, #55E6C1, #1DD1A1); color: #FFF; }
.balloon-color-4 { background: radial-gradient(circle at 30% 30%, #FFEAA7, #F5B041); color: #D35400; }
.balloon-color-5 { background: radial-gradient(circle at 30% 30%, #A29BFE, #6C5CE7); color: #FFF; }
.balloon-color-6 { background: radial-gradient(circle at 30% 30%, #FD79A8, #E84393); color: #FFF; }

.balloon.pop-effect {
    transform: scale(1.4);
    opacity: 0;
    pointer-events: none;
    transition: all 0.2s ease-out;
}

/* Lives container styling */
.game-lives {
    display: flex;
    gap: 5px;
    font-size: 20px;
}

/* Contact Us Page Styles */
.contact-container {
    background-color: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-medium);
    padding: 50px 40px;
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 40px;
}

.contact-info-column {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 30px;
}

.contact-mascot-box {
    background-color: var(--color-primary-light);
    border-radius: var(--border-radius-md);
    padding: 30px;
    text-align: center;
    border: 2px dashed var(--color-primary);
}

.contact-mascot-icon {
    font-size: 70px;
    margin-bottom: 12px;
    display: inline-block;
    animation: bounce 2.5s infinite ease-in-out;
}

.contact-mascot-text {
    font-size: 15px;
    color: var(--color-primary);
    font-weight: 600;
    line-height: 1.5;
}

.contact-details-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact-detail-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.contact-detail-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: #F1F5F9;
    font-size: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-primary);
}

.contact-detail-info {
    display: flex;
    flex-direction: column;
}

.contact-detail-label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
}

.contact-detail-value {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
}

.contact-form-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.contact-form-label {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
}

.contact-form-input {
    padding: 12px 16px;
    border-radius: var(--border-radius-sm);
    border: 2px solid #E2E8F0;
    font-family: 'Fredoka', sans-serif;
    font-size: 15px;
    transition: all 0.2s;
    background-color: #F8FAFC;
    width: 100%;
}

.contact-form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    background-color: #FFFFFF;
    box-shadow: 0 0 0 4px var(--color-primary-light);
}

select.contact-form-input {
    cursor: pointer;
}

/* Success Pop-up overlay styles */
.success-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(44, 62, 80, 0.55);
    backdrop-filter: blur(8px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    padding: 20px;
}

.success-overlay.active {
    display: flex;
}

.success-card {
    background-color: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-medium);
    padding: 40px;
    max-width: 450px;
    width: 100%;
    text-align: center;
    animation: scaleUp 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.success-mascot {
    font-size: 80px;
    margin-bottom: 20px;
    animation: float 3s infinite ease-in-out;
}

.success-title {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.success-message {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 25px;
}