/**
 * Treinamento Ministerial - Styles
 * Desenvolvido por B20 Conteúdo Digital
 * https://www.b20.com.br
 */

/* ===== CSS RESET & BASE ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* ===== CSS VARIABLES ===== */
:root {
    /* Primary Palette - Forest Green */
    --primary-color: #2D5016;
    --secondary-color: #3E7C17;
    --accent-color: #52734D;
    --surface-color: #91C788;
    --text-color: #1a1a1a;
    
    /* Derived Colors */
    --primary-hover: #234010;
    --primary-light: rgba(45, 80, 22, 0.1);
    --secondary-light: rgba(62, 124, 23, 0.1);
    --accent-light: rgba(82, 115, 77, 0.1);
    
    /* Neutral Colors */
    --bg-color: #f8faf7;
    --bg-secondary: #ffffff;
    --text-muted: #666666;
    --text-light: #999999;
    --border-color: #e0e5dd;
    
    /* Semantic Colors */
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    
    /* Gold Accent */
    --gold-color: #D4AF37;
    --gold-light: rgba(212, 175, 55, 0.15);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 12px 48px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Typography */
    --font-ui: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-content: 'Merriweather', Georgia, serif;
    
    /* Z-Index Scale */
    --z-dropdown: 100;
    --z-sticky: 500;
    --z-fixed: 1000;
    --z-modal: 1500;
    --z-toast: 2000;
}

/* Dark Mode */
[data-theme="dark"] {
    --bg-color: #121212;
    --bg-secondary: #1e1e1e;
    --text-color: #f0f0f0;
    --text-muted: #a0a0a0;
    --text-light: #707070;
    --border-color: #333333;
    --surface-color: #2a3a25;
    --primary-light: rgba(45, 80, 22, 0.2);
    --secondary-light: rgba(62, 124, 23, 0.2);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: var(--font-ui);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    padding-top: 60px;
    padding-bottom: 80px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding-top: max(60px, env(safe-area-inset-top));
    padding-bottom: max(80px, env(safe-area-inset-bottom));
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-ui);
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-color);
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

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

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

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

/* ===== HEADER ===== */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-md);
    box-shadow: var(--shadow-sm);
    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 i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.header-logo h1 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--primary-color);
    white-space: nowrap;
}

.desktop-nav {
    display: none;
}

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

.btn-icon {
    width: 44px;
    height: 44px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    transition: all var(--transition-fast);
}

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

/* Desktop Navigation */
@media (min-width: 768px) {
    .header-logo h1 {
        font-size: 1.25rem;
    }
    
    .desktop-nav {
        display: flex;
        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-muted);
        font-weight: 500;
        font-size: 0.875rem;
        transition: all var(--transition-fast);
    }
    
    .desktop-nav .nav-link:hover {
        background: var(--primary-light);
        color: var(--primary-color);
        text-decoration: none;
    }
    
    .desktop-nav .nav-link.active {
        background: var(--primary-color);
        color: white;
    }
    
    .desktop-nav .nav-link i {
        font-size: 1rem;
    }
}

/* ===== BOTTOM NAVIGATION ===== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 65px;
    background: var(--bg-secondary);
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: var(--z-fixed);
    padding-bottom: env(safe-area-inset-bottom);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.6875rem;
    font-weight: 500;
    min-width: 64px;
    min-height: 48px;
    transition: all var(--transition-fast);
}

.nav-item i {
    font-size: 1.25rem;
    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: var(--primary-color);
    border-radius: 50%;
    margin-top: -28px;
    color: white !important;
    box-shadow: 0 4px 12px rgba(45, 80, 22, 0.4);
    padding: 0;
    min-width: 56px;
}

.nav-item-fab:hover {
    background: var(--primary-hover);
    transform: scale(1.05);
}

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

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

@media (min-width: 768px) {
    .bottom-nav {
        display: none !important;
    }
    
    body {
        padding-bottom: var(--spacing-xl);
    }
}

/* ===== MAIN CONTENT ===== */
.main-content {
    min-height: calc(100vh - 140px);
}

.container {
    width: 100%;
    max-width: 100%;
    padding: var(--spacing-md);
    margin: 0 auto;
}

@media (min-width: 768px) {
    .container {
        max-width: 720px;
        padding: var(--spacing-lg);
    }
}

@media (min-width: 1024px) {
    .container {
        max-width: 960px;
    }
}

@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }
}

/* ===== SECTIONS ===== */
.section {
    display: none;
    animation: fadeIn var(--transition-normal);
}

.section.active {
    display: block;
}

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

.section-header {
    margin-bottom: var(--spacing-lg);
}

.section-header h2 {
    margin-bottom: var(--spacing-xs);
}

.section-header p {
    color: var(--text-muted);
    margin-bottom: 0;
}

.section-header.with-back {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.btn-back {
    width: 44px;
    height: 44px;
    border: none;
    background: var(--bg-secondary);
    color: var(--text-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

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

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-ui);
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    min-height: 44px;
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
}

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

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

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

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

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

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

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background: #c82333;
}

.btn-gold {
    background: linear-gradient(135deg, var(--gold-color), #c9a227);
    color: #1a1a1a;
}

.btn-gold:hover {
    background: linear-gradient(135deg, #c9a227, var(--gold-color));
}

/* ===== CARDS ===== */
.card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

/* ===== WELCOME CARD ===== */
.welcome-card {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

.welcome-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

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

.welcome-content h2 {
    color: white;
    margin-bottom: var(--spacing-xs);
    font-size: 1.375rem;
}

.welcome-subtitle {
    opacity: 0.9;
    margin-bottom: var(--spacing-md) !important;
}

.welcome-stats {
    display: flex;
    gap: var(--spacing-lg);
}

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

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
}

.stat-label {
    font-size: 0.75rem;
    opacity: 0.8;
}

.welcome-icon {
    font-size: 4rem;
    opacity: 0.3;
    position: relative;
    z-index: 1;
}

@media (max-width: 480px) {
    .welcome-icon {
        display: none;
    }
    
    .welcome-stats {
        gap: var(--spacing-md);
    }
}

/* ===== QUICK ACTIONS ===== */
.quick-actions {
    margin-bottom: var(--spacing-lg);
}

.quick-actions h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.actions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .actions-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.action-card {
    background: var(--bg-secondary);
    border: none;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.action-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.action-card:hover .action-icon {
    background: var(--primary-color);
    color: white;
}

.action-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-light);
    color: var(--primary-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all var(--transition-fast);
}

.action-card span {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-color);
    text-align: center;
}

/* ===== PROGRESS SECTION ===== */
.current-progress-section,
.recent-activity-section {
    margin-bottom: var(--spacing-lg);
}

.current-progress-section h3,
.recent-activity-section h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.progress-overview {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.progress-cards {
    display: grid;
    gap: var(--spacing-md);
}

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.empty-state i {
    font-size: 3rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.empty-state h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-muted);
}

.empty-state p {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

.empty-state.small {
    padding: var(--spacing-lg);
}

.empty-state.small i {
    font-size: 2rem;
}

.empty-state.small p {
    margin-bottom: var(--spacing-md);
}

/* ===== ACTIVITY LIST ===== */
.activity-list {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition-fast);
}

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

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

.activity-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-light);
    color: var(--primary-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.activity-content {
    flex: 1;
    min-width: 0;
}

.activity-title {
    font-weight: 600;
    font-size: 0.9375rem;
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

.activity-xp {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--gold-color);
}

/* ===== TRACKS ===== */
.track-filters {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    overflow-x: auto;
    padding-bottom: var(--spacing-sm);
    -webkit-overflow-scrolling: touch;
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition-fast);
}

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

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

.tracks-grid {
    display: grid;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .tracks-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.track-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

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

.track-card.completed {
    border-color: var(--success-color);
}

.track-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.track-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.track-info {
    flex: 1;
    min-width: 0;
}

.track-info h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
}

.track-info p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.track-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.track-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

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

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xs);
    font-size: 0.8125rem;
}

.progress-text {
    color: var(--text-muted);
}

.progress-percentage {
    font-weight: 600;
    color: var(--primary-color);
}

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

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

.track-status {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.track-status.not-started {
    background: var(--border-color);
    color: var(--text-muted);
}

.track-status.in-progress {
    background: var(--gold-light);
    color: var(--gold-color);
}

.track-status.completed {
    background: rgba(40, 167, 69, 0.15);
    color: var(--success-color);
}

/* ===== LESSONS ===== */
.track-progress-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.lessons-list {
    display: grid;
    gap: var(--spacing-md);
}

.lesson-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.lesson-card:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.lesson-card.completed {
    border-color: var(--success-color);
    background: rgba(40, 167, 69, 0.05);
}

.lesson-card.locked {
    opacity: 0.6;
    cursor: not-allowed;
}

.lesson-card.locked:hover {
    transform: none;
}

.lesson-number {
    width: 44px;
    height: 44px;
    background: var(--primary-light);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
    flex-shrink: 0;
}

.lesson-card.completed .lesson-number {
    background: var(--success-color);
    color: white;
}

.lesson-card.completed .lesson-number::after {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
}

.lesson-card.completed .lesson-number span {
    display: none;
}

.lesson-card.locked .lesson-number {
    background: var(--border-color);
    color: var(--text-light);
}

.lesson-card.locked .lesson-number::after {
    content: '\f023';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
}

.lesson-card.locked .lesson-number span {
    display: none;
}

.lesson-info {
    flex: 1;
    min-width: 0;
}

.lesson-info h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.lesson-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.lesson-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.lesson-arrow {
    color: var(--text-light);
    font-size: 1rem;
}

/* ===== LESSON DETAIL ===== */
.lesson-content-wrapper {
    display: grid;
    gap: var(--spacing-lg);
}

.lesson-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.lesson-content h3 {
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.lesson-content h3 i {
    color: var(--primary-color);
}

.content-list {
    list-style: none;
}

.content-list li {
    padding: var(--spacing-md);
    background: var(--primary-light);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-content);
    line-height: 1.7;
    position: relative;
    padding-left: var(--spacing-xl);
}

.content-list li::before {
    content: '\f02d';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: var(--spacing-md);
    color: var(--primary-color);
}

.lesson-steps {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.lesson-steps h3 {
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.lesson-steps h3 i {
    color: var(--secondary-color);
}

.steps-list {
    display: grid;
    gap: var(--spacing-sm);
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--secondary-light);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.step-item.completed {
    background: rgba(40, 167, 69, 0.1);
}

.step-checkbox {
    width: 24px;
    height: 24px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

.step-item.completed .step-checkbox {
    background: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

.step-item.completed .step-checkbox::after {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 0.75rem;
}

.step-text {
    font-size: 0.9375rem;
    line-height: 1.5;
}

.lesson-challenge {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.lesson-challenge h3 {
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.lesson-challenge h3 i {
    color: var(--gold-color);
}

.challenge-card {
    background: var(--gold-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
}

.challenge-card p {
    font-family: var(--font-content);
    font-size: 1.0625rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-color);
}

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

.lesson-actions .btn {
    flex: 1;
    min-width: 120px;
}

@media (max-width: 480px) {
    .lesson-actions {
        flex-direction: column;
    }
    
    .lesson-actions .btn {
        width: 100%;
    }
}

/* ===== PRACTICE ===== */
.daily-challenge-card {
    background: linear-gradient(135deg, var(--gold-color), #c9a227);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    color: #1a1a1a;
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
}

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

.challenge-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
}

.challenge-badge i {
    font-size: 1.25rem;
}

.challenge-xp {
    background: rgba(0, 0, 0, 0.2);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 0.875rem;
}

.challenge-body h3 {
    color: #1a1a1a;
    margin-bottom: var(--spacing-sm);
}

.challenge-body p {
    opacity: 0.9;
    margin-bottom: 0;
}

.challenge-footer {
    margin-top: var(--spacing-lg);
}

.challenge-footer .btn {
    background: #1a1a1a;
    color: var(--gold-color);
    width: 100%;
}

.challenge-footer .btn:hover {
    background: #333;
}

.practice-categories {
    margin-bottom: var(--spacing-lg);
}

.practice-categories h3 {
    margin-bottom: var(--spacing-md);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .categories-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.category-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
    border: 2px solid transparent;
}

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

.category-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-light);
    color: var(--primary-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto var(--spacing-sm);
}

.category-card h4 {
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-xs);
}

.category-card span {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.active-challenges-section,
.completed-challenges-section {
    margin-bottom: var(--spacing-lg);
}

.active-challenges-section h3,
.completed-challenges-section h3 {
    margin-bottom: var(--spacing-md);
}

.challenges-list {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.challenge-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition-fast);
}

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

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

.challenge-icon {
    width: 44px;
    height: 44px;
    background: var(--gold-light);
    color: var(--gold-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    flex-shrink: 0;
}

.challenge-info {
    flex: 1;
    min-width: 0;
}

.challenge-info h4 {
    font-size: 0.9375rem;
    margin-bottom: 2px;
}

.challenge-info p {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-bottom: 0;
}

.challenge-action {
    flex-shrink: 0;
}

/* ===== PROGRESS PAGE ===== */
.level-card {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    color: white;
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
}

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

.level-badge {
    width: 64px;
    height: 64px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid rgba(255, 255, 255, 0.5);
}

.level-number {
    font-size: 1.75rem;
    font-weight: 700;
}

.level-details h3 {
    color: white;
    margin-bottom: var(--spacing-xs);
}

.level-details p {
    opacity: 0.9;
    margin-bottom: 0;
    font-size: 0.875rem;
}

.xp-progress {
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.xp-info {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.xp-progress .progress-bar {
    background: rgba(255, 255, 255, 0.3);
}

.xp-progress .progress-fill {
    background: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

@media (min-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.stat-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.stat-card .stat-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-light);
    color: var(--primary-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin: 0 auto var(--spacing-sm);
}

.stat-card .stat-info .stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
}

.stat-card .stat-info .stat-label {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.achievements-section,
.tracks-progress-section {
    margin-bottom: var(--spacing-lg);
}

.achievements-section h3,
.tracks-progress-section h3 {
    margin-bottom: var(--spacing-md);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .achievements-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 1024px) {
    .achievements-grid {
        grid-template-columns: repeat(6, 1fr);
    }
}

.achievement-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.achievement-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.achievement-card.locked {
    opacity: 0.5;
    filter: grayscale(1);
}

.achievement-icon {
    width: 56px;
    height: 56px;
    background: var(--gold-light);
    color: var(--gold-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto var(--spacing-sm);
}

.achievement-card.locked .achievement-icon {
    background: var(--border-color);
    color: var(--text-light);
}

.achievement-card h4 {
    font-size: 0.75rem;
    margin-bottom: 0;
}

.tracks-progress-list {
    display: grid;
    gap: var(--spacing-md);
}

.track-progress-item {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

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

.track-progress-header h4 {
    font-size: 1rem;
}

.track-progress-header span {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* ===== PROFILE ===== */
.profile-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.profile-avatar {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    flex-shrink: 0;
}

.profile-info {
    flex: 1;
    min-width: 0;
}

.profile-info h3 {
    margin-bottom: var(--spacing-xs);
}

.profile-info p {
    color: var(--text-muted);
    margin-bottom: 0;
    font-size: 0.875rem;
}

.profile-form-wrapper {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

/* ===== FORMS ===== */
.form {
    display: grid;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: var(--font-ui);
    font-size: 1rem;
    background: var(--bg-color);
    color: var(--text-color);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-group input:invalid:not(:placeholder-shown),
.form-group input.error {
    border-color: var(--danger-color);
}

.form-error {
    font-size: 0.75rem;
    color: var(--danger-color);
    min-height: 1rem;
}

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

/* ===== SETTINGS ===== */
.settings-section,
.data-section {
    margin-bottom: var(--spacing-lg);
}

.settings-section h3,
.data-section h3 {
    margin-bottom: var(--spacing-md);
}

.settings-list {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

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

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

.setting-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.setting-info i {
    width: 24px;
    color: var(--primary-color);
}

.setting-title {
    display: block;
    font-weight: 600;
    font-size: 0.9375rem;
}

.setting-description {
    display: block;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* Toggle Switch */
.toggle {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
}

.toggle 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: 50%;
    box-shadow: var(--shadow-sm);
}

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

.toggle input:checked + .toggle-slider::before {
    transform: translateX(24px);
}

.data-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* ===== FAQ ===== */
.faq-section {
    margin-bottom: var(--spacing-lg);
}

.faq-section h3 {
    margin-bottom: var(--spacing-md);
}

.faq-container {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.faq-item {
    border-bottom: 1px solid var(--border-color);
}

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

.faq-question {
    width: 100%;
    padding: var(--spacing-md);
    background: none;
    border: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-ui);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    text-align: left;
    transition: all var(--transition-fast);
}

.faq-question:hover {
    background: var(--primary-light);
}

.faq-icon {
    transition: transform var(--transition-fast);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: var(--text-muted);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.faq-answer p {
    margin-bottom: 0;
}

/* ===== MODALS ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    padding: var(--spacing-md);
    animation: fadeIn var(--transition-fast);
}

.modal {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-xl);
    animation: slideUp var(--transition-normal);
}

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    margin: 0;
}

.btn-close {
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-close:hover {
    background: var(--danger-color);
    color: white;
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

/* Celebration Modal */
.celebration-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    padding: var(--spacing-md);
}

.celebration-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
    max-width: 360px;
    animation: celebrationPop 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes celebrationPop {
    0% {
        opacity: 0;
        transform: scale(0.5);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.celebration-icon {
    width: 80px;
    height: 80px;
    background: var(--gold-light);
    color: var(--gold-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin: 0 auto var(--spacing-lg);
    animation: bounce 1s infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.celebration-content h2 {
    margin-bottom: var(--spacing-sm);
}

.celebration-content p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.celebration-xp {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gold-color);
    margin-bottom: var(--spacing-lg);
}

/* ===== TOAST ===== */
.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;
}

@media (min-width: 768px) {
    .toast-container {
        bottom: var(--spacing-lg);
    }
}

.toast {
    background: var(--text-color);
    color: var(--bg-color);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    animation: toastIn 0.3s ease, toastOut 0.3s ease 2.7s forwards;
    pointer-events: auto;
}

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

.toast.error {
    background: var(--danger-color);
    color: white;
}

.toast.warning {
    background: var(--warning-color);
    color: #1a1a1a;
}

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

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

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

/* ===== FOOTER ===== */
.app-footer {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 80px;
}

@media (min-width: 768px) {
    .app-footer {
        margin-bottom: 0;
    }
}

.app-footer p {
    margin-bottom: var(--spacing-xs);
}

.app-footer .b20-link {
    color: var(--primary-color);
    font-weight: 600;
    transition: all var(--transition-fast);
}

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

/* ===== SKELETON LOADING ===== */
.skeleton {
    background: linear-gradient(90deg, 
        var(--border-color) 25%, 
        var(--bg-secondary) 50%, 
        var(--border-color) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* ===== UTILITIES ===== */
.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;
}

.hidden {
    display: none !important;
}

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

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

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

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

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

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

/* ===== FOCUS STYLES ===== */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ===== PRINT STYLES ===== */
@media print {
    .app-header,
    .bottom-nav,
    .app-footer {
        display: none;
    }
    
    body {
        padding: 0;
    }
    
    .section {
        display: block !important;
    }
}