/**
 * Alfabeto Interativo - Estilos Principais
 * Desenvolvido por B20 Conteúdo Digital
 * https://www.b20.com.br
 */

/* ==========================================
   CSS Custom Properties (Design Tokens)
   ========================================== */
:root {
    /* Paleta Pastel Dreams */
    --primary-color: #7C3AED;
    --primary-light: #A78BFA;
    --primary-dark: #5B21B6;
    --secondary-color: #EC4899;
    --secondary-light: #F9A8D4;
    --accent-color: #10B981;
    --accent-light: #6EE7B7;
    
    /* Cores de Feedback */
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --error-color: #EF4444;
    --info-color: #3B82F6;
    
    /* Cores Neutras */
    --background-color: #FEF3F2;
    --surface-color: #FFFFFF;
    --text-color: #1F2937;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    --border-color: #E5E7EB;
    
    /* Cores de Letras */
    --vowel-color: #EC4899;
    --consonant-color: #7C3AED;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Tipografia */
    --font-primary: 'Nunito', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Fredoka One', cursive;
    
    /* Espaçamento */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transições */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Z-Index */
    --z-dropdown: 100;
    --z-sticky: 500;
    --z-fixed: 1000;
    --z-modal-backdrop: 1500;
    --z-modal: 2000;
    --z-toast: 2500;
    
    /* Configurações Mobile */
    --ad-banner-height: 0px;
}

/* Dark Mode */
.dark-mode {
    --background-color: #1F1F2E;
    --surface-color: #2D2D44;
    --text-color: #F9FAFB;
    --text-secondary: #D1D5DB;
    --text-muted: #9CA3AF;
    --border-color: #4B5563;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

/* ==========================================
   CSS Reset & Base Styles
   ========================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: clamp(14px, 2.5vw, 16px);
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    padding-top: 60px;
    padding-bottom: calc(80px + var(--ad-banner-height) + env(safe-area-inset-bottom, 0px));
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

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

/* Focus Visible */
:focus-visible {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

/* Selection */
::selection {
    background-color: var(--primary-light);
    color: white;
}

/* ==========================================
   Header Styles
   ========================================== */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--surface-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-md);
    box-shadow: var(--shadow-md);
    z-index: var(--z-fixed);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.header-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-logo .logo-img {
    width: 36px;
    height: 36px;
    object-fit: contain;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.header-logo h1 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--primary-color);
    white-space: nowrap;
}

.desktop-nav {
    display: none;
    gap: var(--spacing-xs);
}

.desktop-nav .nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.desktop-nav .nav-link:hover {
    background: var(--background-color);
    color: var(--primary-color);
}

.desktop-nav .nav-link.active {
    background: var(--primary-color);
    color: white;
}

.header-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

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

.btn-icon i {
    font-size: 1.125rem;
}

/* ==========================================
   Bottom Navigation (Mobile)
   ========================================== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: var(--surface-color);
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.08);
    z-index: var(--z-fixed);
    padding-bottom: env(safe-area-inset-bottom, 0);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 600;
    transition: all var(--transition-fast);
    min-width: 70px;
}

.nav-item i {
    font-size: 1.5rem;
    transition: transform var(--transition-fast);
}

.nav-item.active {
    color: var(--primary-color);
}

.nav-item.active i {
    transform: scale(1.15);
}

.nav-item-fab {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-full);
    margin-top: -28px;
    color: white !important;
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.4);
    padding: 0;
    min-width: auto;
}

.nav-item-fab i {
    font-size: 1.5rem;
}

.nav-item-fab span {
    display: none;
}

/* ==========================================
   Main Content & Sections
   ========================================== */
main {
    min-height: calc(100vh - 130px);
}

.section {
    padding: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.section.hidden {
    display: none;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-family: var(--font-display);
    font-size: 1.75rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

.subsection-title {
    font-size: 1.25rem;
    color: var(--text-color);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* ==========================================
   Hero Section
   ========================================== */
.hero-section {
    text-align: center;
    padding: var(--spacing-xl) 0;
    position: relative;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-mascot {
    font-size: 5rem;
    margin-bottom: var(--spacing-md);
}

.hero-title {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    min-width: 100px;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.stat-icon {
    font-size: 1.5rem;
}

.stat-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* Floating Decorations */
.floating-decorations {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.floating-item {
    position: absolute;
    opacity: 0.7;
    filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.1));
}

.floating-letter {
    position: absolute;
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--primary-light);
    opacity: 0.3;
    animation: float 6s ease-in-out infinite;
    animation-delay: var(--delay, 0s);
    left: var(--x, 50%);
    top: -50px;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.3;
    }
    90% {
        opacity: 0.3;
    }
    100% {
        transform: translateY(calc(100vh + 100px)) rotate(360deg);
        opacity: 0;
    }
}

/* ==========================================
   Buttons
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
}

.btn-secondary {
    background: var(--surface-color);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-accent {
    background: linear-gradient(135deg, var(--accent-color), #059669);
    color: white;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #059669);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, var(--error-color), #DC2626);
    color: white;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.75rem;
}

.btn-sound {
    background: var(--background-color);
    color: var(--primary-color);
    border: 2px solid var(--primary-light);
}

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

/* ==========================================
   Quick Access Cards
   ========================================== */
.quick-access {
    margin-top: var(--spacing-2xl);
}

.cards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.access-card {
    background: var(--surface-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    cursor: pointer;
}

.access-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.access-card .card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.access-card h4 {
    font-size: 0.875rem;
    color: var(--text-color);
    margin-bottom: var(--spacing-xs);
}

.access-card p {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ==========================================
   Daily Challenge
   ========================================== */
.daily-challenge {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    color: white;
}

.challenge-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.challenge-icon {
    font-size: 1.5rem;
}

.challenge-header h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
}

.challenge-text {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.95;
}

.challenge-progress {
    display: flex;
    align-items: center;
    width: 100%;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.progress-bar {
    flex: 1;
    height: 12px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: white;
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

.progress-text {
    font-weight: 700;
    font-size: 0.875rem;
}

.daily-challenge .btn {
    background: white;
    color: var(--primary-color);
}

.daily-challenge .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* ==========================================
   Alphabet Grid
   ========================================== */
.alphabet-filters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    background: var(--surface-color);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.875rem;
    border: 2px solid transparent;
    transition: all var(--transition-fast);
}

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

.filter-btn.active {
    background: var(--primary-color);
    color: white;
}

.alphabet-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
    gap: var(--spacing-md);
}

.letter-card {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 3px solid transparent;
    position: relative;
    overflow: hidden;
}

.letter-card:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.letter-card.vowel {
    border-color: var(--vowel-color);
}

.letter-card.consonant {
    border-color: var(--consonant-color);
}

.letter-card.learned {
    background: linear-gradient(135deg, var(--success-color), var(--accent-color));
}

.letter-card.learned .letter-char {
    color: white;
}

.letter-card .letter-char {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--primary-color);
}

.letter-card .letter-type-indicator {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
}

.letter-card.vowel .letter-type-indicator {
    background: var(--vowel-color);
}

.letter-card.consonant .letter-type-indicator {
    background: var(--consonant-color);
}

.letter-card .learned-badge {
    position: absolute;
    bottom: 4px;
    right: 4px;
    font-size: 0.75rem;
}

/* ==========================================
   Modal Styles
   ========================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal[hidden] {
    display: none;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--surface-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn var(--transition-normal);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background: var(--background-color);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--error-color);
    color: white;
}

/* Letter Detail Modal */
.letter-detail .letter-display {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.letter-detail .big-letter {
    font-family: var(--font-display);
    font-size: 6rem;
    color: var(--primary-color);
    display: block;
    line-height: 1;
}

.letter-forms {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-md);
}

.letter-uppercase, .letter-lowercase {
    font-family: var(--font-display);
    font-size: 2rem;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--background-color);
    border-radius: var(--radius-md);
    color: var(--text-color);
}

.letter-info {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.letter-type {
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
}

.letter-type.vowel {
    background: var(--vowel-color);
    color: white;
}

.letter-type.consonant {
    background: var(--consonant-color);
    color: white;
}

.letter-words {
    margin-bottom: var(--spacing-lg);
}

.letter-words h4 {
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.words-carousel {
    display: flex;
    gap: var(--spacing-md);
    overflow-x: auto;
    padding: var(--spacing-sm) 0;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.word-card {
    flex: 0 0 auto;
    width: 120px;
    padding: var(--spacing-md);
    background: var(--background-color);
    border-radius: var(--radius-lg);
    text-align: center;
    scroll-snap-align: start;
}

.word-card .word-emoji {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
}

.word-card .word-text {
    font-weight: 700;
    color: var(--text-color);
    font-size: 0.875rem;
}

.letter-trace {
    margin-bottom: var(--spacing-lg);
}

.letter-trace h4 {
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.letter-trace canvas {
    width: 100%;
    height: 150px;
    background: var(--background-color);
    border-radius: var(--radius-lg);
    border: 2px dashed var(--border-color);
    touch-action: none;
}

.trace-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.modal-actions {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* ==========================================
   Games Section
   ========================================== */
.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.game-card {
    background: var(--surface-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.game-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.game-card .game-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.game-card:hover .game-icon {
    transform: scale(1.15) rotate(-5deg);
}

.game-card h3 {
    font-family: var(--font-display);
    font-size: 1.4rem;
    margin-bottom: var(--spacing-sm);
    color: inherit;
}

.game-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
    min-height: 40px;
}

.game-difficulty {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.difficulty-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

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

.difficulty-stars .far {
    color: var(--border-color);
}

/* Cores específicas para cada jogo */
.game-card[data-game="memory"] { border-color: #EC4899; }
.game-card[data-game="memory"] h3, .game-card[data-game="memory"] .game-icon { color: #EC4899; }
.game-card[data-game="memory"] .btn { background-color: #EC4899; box-shadow: 0 4px 10px rgba(236, 72, 153, 0.3); }

.game-card[data-game="dragdrop"] { border-color: #3B82F6; }
.game-card[data-game="dragdrop"] h3, .game-card[data-game="dragdrop"] .game-icon { color: #3B82F6; }
.game-card[data-game="dragdrop"] .btn { background-color: #3B82F6; box-shadow: 0 4px 10px rgba(59, 130, 246, 0.3); }

.game-card[data-game="complete"] { border-color: #10B981; }
.game-card[data-game="complete"] h3, .game-card[data-game="complete"] .game-icon { color: #10B981; }
.game-card[data-game="complete"] .btn { background-color: #10B981; box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3); }

.game-card[data-game="sound"] { border-color: #F59E0B; }
.game-card[data-game="sound"] h3, .game-card[data-game="sound"] .game-icon { color: #F59E0B; }
.game-card[data-game="sound"] .btn { background-color: #F59E0B; box-shadow: 0 4px 10px rgba(245, 158, 11, 0.3); }

.game-card .btn:hover {
    filter: brightness(1.1);
    transform: translateY(-2px);
}

/* Game Container */
.game-container {
    background: var(--surface-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.game-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-color);
}

.game-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--primary-color);
}

.game-stats {
    display: flex;
    gap: var(--spacing-md);
}

.game-score, .game-timer {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 700;
    color: var(--text-color);
}

.game-score i {
    color: var(--warning-color);
}

.game-timer i {
    color: var(--info-color);
}

.game-area {
    min-height: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.game-controls {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 2px solid var(--border-color);
}

/* Memory Game */
.memory-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
    max-width: 400px;
    width: 100%;
}

.memory-card {
    aspect-ratio: 1;
    background: var(--primary-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
    transform-style: preserve-3d;
}

.memory-card:hover {
    transform: scale(1.05);
}

.memory-card.flipped {
    background: var(--surface-color);
    color: var(--primary-color);
    border: 3px solid var(--primary-color);
}

.memory-card.matched {
    background: var(--success-color);
    color: white;
    border: none;
    pointer-events: none;
}

.memory-card .card-back {
    font-size: 1.5rem;
}

/* Drag and Drop Game */
.drag-drop-area {
    width: 100%;
}

.word-display {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.word-image {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.word-slots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.letter-slot {
    width: 50px;
    height: 60px;
    background: var(--background-color);
    border: 3px dashed var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: all var(--transition-fast);
}

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

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

.letter-slot.incorrect {
    border-color: var(--error-color);
    background: #FEE2E2;
}

.letter-slot.drag-over {
    border-color: var(--primary-color);
    background: var(--primary-light);
    transform: scale(1.1);
}

.draggable-letters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.draggable-letter {
    width: 50px;
    height: 60px;
    background: var(--primary-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: white;
    cursor: grab;
    transition: all var(--transition-fast);
    user-select: none;
    touch-action: none;
}

.draggable-letter:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.draggable-letter.dragging {
    opacity: 0.5;
    cursor: grabbing;
}

.draggable-letter.used {
    opacity: 0.3;
    pointer-events: none;
}

/* Complete Word Game */
.complete-word-area {
    text-align: center;
    width: 100%;
}

.complete-word-display {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.complete-word-text {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    font-family: var(--font-display);
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xl);
}

.complete-word-text .letter {
    color: var(--text-color);
}

.complete-word-text .missing {
    width: 50px;
    height: 60px;
    background: var(--background-color);
    border: 3px dashed var(--primary-color);
    border-radius: var(--radius-md);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
}

.letter-options {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.letter-option {
    width: 60px;
    height: 70px;
    background: var(--surface-color);
    border: 3px solid var(--primary-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--primary-color);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.letter-option:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

.letter-option.correct {
    background: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

.letter-option.incorrect {
    background: var(--error-color);
    border-color: var(--error-color);
    color: white;
}

/* Sound Game */
.sound-game-area {
    text-align: center;
    width: 100%;
}

.sound-prompt {
    margin-bottom: var(--spacing-xl);
}

.sound-prompt p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.play-sound-btn {
    width: 100px;
    height: 100px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-size: 2.5rem;
    box-shadow: 0 4px 20px rgba(124, 58, 237, 0.4);
    transition: all var(--transition-fast);
}

.play-sound-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 25px rgba(124, 58, 237, 0.5);
}

.play-sound-btn.playing {
    animation: pulse 0.5s ease infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* Game Complete Modal */
.game-complete {
    text-align: center;
}

.celebration-animation {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.celebration-animation .confetti {
    display: inline-block;
    animation: confettiFall 1s ease infinite;
}

.celebration-animation .confetti:nth-child(2) {
    animation-delay: 0.2s;
}

.celebration-animation .confetti:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes confettiFall {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-10px) rotate(180deg); }
}

.complete-title {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.complete-message {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.complete-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.complete-stats .stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.complete-stats .stat-icon {
    font-size: 1.5rem;
}

.complete-stats .stat-value {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--primary-color);
}

.complete-stats .stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.complete-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* ==========================================
   Progress Section
   ========================================== */
.progress-overview {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.progress-card {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), var(--surface-color));
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(124, 58, 237, 0.2);
}

.main-progress {
    text-align: center;
}

.progress-circle {
    width: 150px;
    height: 150px;
    margin: 0 auto var(--spacing-md);
    position: relative;
}

.progress-circle svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.progress-circle .progress-bg {
    fill: none;
    stroke: var(--border-color);
    stroke-width: 8;
}

.progress-circle .progress-fill {
    fill: none;
    stroke: var(--primary-color);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 283;
    stroke-dashoffset: 283;
    transition: stroke-dashoffset var(--transition-slow);
}

.progress-circle .progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.progress-circle .progress-value {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--primary-color);
    display: block;
}

.progress-circle .progress-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.progress-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.detail-card {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.detail-card:nth-child(1) {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), var(--surface-color));
    border-left: 5px solid #3B82F6;
}

.detail-card:nth-child(2) {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), var(--surface-color));
    border-left: 5px solid var(--success-color);
}

.detail-card:nth-child(3) {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), var(--surface-color));
    border-left: 5px solid var(--warning-color);
}

.detail-card .detail-icon {
    font-size: 2rem;
}

.detail-info {
    flex: 1;
}

.detail-value {
    font-weight: 700;
    color: var(--text-color);
    display: block;
}

.detail-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.detail-bar {
    height: 8px;
    background: var(--border-color);
    border-radius: var(--radius-full);
    flex: 1;
    overflow: hidden;
}

.detail-bar .bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

.streak-flames {
    display: flex;
    gap: var(--spacing-xs);
}

.streak-flames .flame {
    font-size: 1.25rem;
    opacity: 0.3;
    transition: opacity var(--transition-fast);
}

.streak-flames .flame.active {
    opacity: 1;
}

/* Achievements */
.achievements-section {
    margin-bottom: var(--spacing-2xl);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--spacing-md);
}

.achievement-card {
    background: linear-gradient(135deg, rgba(156, 163, 175, 0.05), var(--surface-color));
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    opacity: 0.6;
    transition: all var(--transition-fast);
    border: 2px solid rgba(156, 163, 175, 0.2);
}

.achievement-card.unlocked {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.15), var(--surface-color));
    border-color: var(--warning-color);
    opacity: 1;
    box-shadow: var(--shadow-md);
}

.achievement-card.locked {
    opacity: 0.5;
}

.achievement-card .achievement-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.achievement-card.locked .achievement-icon {
    filter: grayscale(1);
}

.achievement-card h4 {
    font-size: 0.75rem;
    color: var(--text-color);
    margin-bottom: var(--spacing-xs);
}

.achievement-card p {
    font-size: 0.625rem;
    color: var(--text-secondary);
}

/* History Calendar */
.history-section {
    margin-bottom: var(--spacing-2xl);
}

.history-calendar {
    background: var(--surface-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.calendar-header h4 {
    font-size: 1rem;
    color: var(--text-color);
}

.calendar-nav {
    display: flex;
    gap: var(--spacing-sm);
}

.calendar-nav button {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: var(--background-color);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.calendar-nav button:hover {
    background: var(--primary-color);
    color: white;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: var(--spacing-xs);
}

.calendar-day-name {
    text-align: center;
    font-size: 0.625rem;
    color: var(--text-muted);
    font-weight: 600;
    padding: var(--spacing-xs);
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.calendar-day.other-month {
    opacity: 0.3;
}

.calendar-day.today {
    background: var(--primary-light);
    color: white;
    font-weight: 700;
}

.calendar-day.has-activity {
    background: var(--success-color);
    color: white;
}

.calendar-day.has-activity::after {
    content: '✓';
    font-size: 0.5rem;
    position: absolute;
}

/* ==========================================
   Parents Section
   ========================================== */
.pin-protection {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
}

.pin-card {
    background: var(--surface-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
    box-shadow: var(--shadow-lg);
    max-width: 350px;
    width: 100%;
}

.pin-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.pin-card h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.pin-card > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.pin-input-container {
    margin-bottom: var(--spacing-lg);
}

.pin-input {
    width: 100%;
    max-width: 200px;
    padding: var(--spacing-md);
    font-size: 1.5rem;
    text-align: center;
    letter-spacing: 0.5rem;
    border: 3px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--background-color);
    color: var(--text-color);
    transition: border-color var(--transition-fast);
}

.pin-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.pin-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--spacing-md);
}

/* Parents Dashboard */
.parents-dashboard {
    display: grid;
    gap: var(--spacing-lg);
}

.dashboard-card {
    background: var(--surface-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.dashboard-card h3 {
    font-size: 1.125rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Profile Form */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--spacing-xs);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--background-color);
    color: var(--text-color);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.avatar-selector {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.avatar-option {
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
    border-radius: var(--radius-full);
    border: 3px solid var(--border-color);
    background: var(--background-color);
    transition: all var(--transition-fast);
}

.avatar-option:hover {
    border-color: var(--primary-light);
}

.avatar-option.selected {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

/* Report Card */
.report-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.report-stat {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--background-color);
    border-radius: var(--radius-lg);
}

.report-stat .stat-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--primary-color);
    display: block;
}

.report-stat .stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.letters-progress-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
}

.letter-progress-item {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1rem;
    border-radius: var(--radius-sm);
    background: var(--border-color);
    color: var(--text-muted);
}

.letter-progress-item.learned {
    background: var(--success-color);
    color: white;
}

.letter-progress-item.in-progress {
    background: var(--warning-color);
    color: white;
}

/* Settings */
.setting-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-color);
}

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

.setting-info {
    flex: 1;
}

.setting-label {
    font-weight: 600;
    color: var(--text-color);
    display: block;
}

.setting-description {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.setting-item select {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--background-color);
    color: var(--text-color);
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 28px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: var(--transition-fast);
    border-radius: var(--radius-full);
}

.toggle-slider::before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition-fast);
    border-radius: var(--radius-full);
}

.toggle-switch input:checked + .toggle-slider {
    background-color: var(--primary-color);
}

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(22px);
}

/* Danger Zone */
.danger-zone {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--error-color);
}

.danger-zone h4 {
    color: var(--error-color);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

/* Tips */
.tips-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.tip-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--background-color);
    border-radius: var(--radius-lg);
}

.tip-item .tip-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.tip-item p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

/* ==========================================
   Toast Notifications
   ========================================== */
.toast-container {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    pointer-events: none;
}

.toast {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    animation: toastSlideIn var(--transition-normal);
    pointer-events: auto;
    max-width: 90vw;
}

.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--error-color);
}

.toast.warning {
    border-left: 4px solid var(--warning-color);
}

.toast.info {
    border-left: 4px solid var(--info-color);
}

.toast-icon {
    font-size: 1.25rem;
}

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

.toast.error .toast-icon {
    color: var(--error-color);
}

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

.toast.info .toast-icon {
    color: var(--info-color);
}

.toast-message {
    color: var(--text-color);
    font-size: 0.875rem;
}

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

.toast.hiding {
    animation: toastSlideOut var(--transition-normal) forwards;
}

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

/* ==========================================
   Footer
   ========================================== */
.app-footer {
    background: var(--surface-color);
    padding: var(--spacing-xl) var(--spacing-md) var(--spacing-md);
    border-top: 2px dashed var(--border-color);
    margin-bottom: 65px;
    font-family: var(--font-primary);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2xl);
    justify-content: space-between;
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.footer-brand {
    flex: 1 1 250px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.footer-logo {
    width: 64px;
    height: 64px;
    object-fit: contain;
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.1));
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
}

.footer-links-grid {
    flex: 2 1 400px;
    display: flex;
    gap: var(--spacing-2xl);
    justify-content: flex-end;
}

.footer-links-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links-group h4 {
    color: var(--text-color);
    font-family: var(--font-display);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
}

.footer-links-group a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 600;
    transition: color var(--transition-fast), transform var(--transition-fast);
}

.footer-links-group a:hover {
    color: var(--primary-color);
    transform: translateX(4px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    color: var(--text-muted);
    font-size: 0.875rem;
}

.b20-link {
    color: var(--primary-color);
    font-weight: 700;
    transition: all var(--transition-fast);
}

.b20-link:hover {
    text-decoration: underline;
}

/* ==========================================
   Utility Classes
   ========================================== */
.hidden {
    display: none !important;
}

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

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

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

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

.text-error {
    color: var(--error-color);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

/* ==========================================
   Scrollbar Styling
   ========================================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}