/* 
 * FITNESS CHALLENGE - NOVA PALETA DE CORES 2024
 * Paleta minimalista e energética
 * 
 * CORES PRINCIPAIS:
 * Laranja Vibrante: #FF9800 (energia e motivação)
 * Laranja Claro: #FFB74D (suavidade)
 * Cinza Escuro: #2E2E2E (contraste e texto)
 * Cinza Médio: #757575 (texto secundário)
 * Cinza Claro: #BDBDBD (elementos sutis)
 * Branco Puro: #FFFFFF (clareza e fundos)
 */

/* APLICAÇÃO DA NOVA PALETA LARANJA-CINZA */
.app-header h1,
.welcome-card h2,
.faq-section h2,
.faq-intro h2,
.stat-value,
.templates-container h3 { 
    color: #FF9800 !important; 
}

.primary-btn,
.progress-btn { 
    background: linear-gradient(135deg, #FF9800, #FFB74D) !important; 
    color: #FFFFFF !important;
}

#create-challenge-btn { 
    background: linear-gradient(135deg, #FF9800, #FFB74D) !important; 
    color: #FFFFFF !important;
}

.faq-category h3 {
    background: linear-gradient(135deg, #FF9800, #FFB74D) !important;
    color: #FFFFFF !important;
}

.faq-question:hover,
.faq-icon {
    color: #FF9800 !important;
}

.faq-question[aria-expanded="true"] .faq-icon {
    background: #FF9800 !important;
    color: #FFFFFF !important;
}

.progress-fill {
    background: linear-gradient(90deg, #FF9800, #FFB74D) !important;
}

.achievement-card.unlocked {
    border-left-color: #FF9800 !important;
}

/* APLICAÇÃO ADICIONAL DE CORES */
.welcome-card {
    background: linear-gradient(135deg, rgba(255, 152, 0, 0.05), rgba(189, 189, 189, 0.03)) !important;
    border: 1px solid rgba(255, 152, 0, 0.2) !important;
}

.welcome-card::before {
    background: linear-gradient(90deg, #FF9800, #FFB74D, #F57C00) !important;
}

/* APLICAÇÃO DA COR LARANJA #FF9800 */
.secondary-btn {
    background: linear-gradient(135deg, #FF9800, #FFB74D) !important;
    color: #FFFFFF !important;
    border: none !important;
}

.secondary-btn:hover {
    background: linear-gradient(135deg, #F57C00, #FF9800) !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 6px 20px rgba(255, 152, 0, 0.3) !important;
}

.warning-btn,
.challenge-card.expired .challenge-status {
    background: #FF9800 !important;
    color: #FFFFFF !important;
}

.bottom-nav .nav-item.active {
    color: #FF9800 !important;
}

.challenge-card:hover {
    border-left-color: #FF9800 !important;
}

/* APLICAÇÃO DE TONS NEUTROS */
.empty-state,
.form-container,
.stats-card {
    background: rgba(248, 249, 250, 0.8) !important;
    border: 1px solid rgba(189, 189, 189, 0.2) !important;
}

/* MAIS APLICAÇÕES DO LARANJA #FF9800 */
.template-card:hover {
    border-left-color: #FF9800 !important;
    transform: translateY(-2px) !important;
}

.achievement-card.locked .achievement-icon {
    color: #757575 !important;
    opacity: 0.7;
}

.delete-btn,
.danger-btn {
    background: linear-gradient(135deg, #2E2E2E, #424242) !important;
    color: #FFFFFF !important;
}

.delete-btn:hover,
.danger-btn:hover {
    background: linear-gradient(135deg, #424242, #2E2E2E) !important;
    box-shadow: 0 6px 20px rgba(46, 46, 46, 0.4) !important;
}

/* APLICAÇÃO DE TONS NEUTROS PARA HOVER */
.language-btn:hover,
.faq-item:hover,
.template-card:hover,
.achievement-card:hover {
    background: rgba(255, 152, 0, 0.05) !important;
}

.modal-content {
    background: rgba(248, 249, 250, 0.95) !important;
    backdrop-filter: blur(10px);
}

.challenge-card.active {
    background: rgba(255, 152, 0, 0.05) !important;
}

/* ELEMENTOS COM COR LARANJA #FF9800 DESTACADOS */
.badge-warning,
.alert-warning,
.challenge-day-remaining {
    background: #FF9800 !important;
    color: #FFFFFF !important;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.progress-percentage {
    color: #FF9800 !important;
    font-weight: 700;
}

.nav-item:hover {
    color: #FF9800 !important;
    transform: scale(1.1);
}

/* ELEMENTOS COM TONS NEUTROS E LARANJA */
.input-group:focus-within,
.form-control:focus {
    background: rgba(255, 152, 0, 0.05) !important;
    border-color: #FF9800 !important;
}

.dropdown-menu,
.tooltip,
.popover {
    background: rgba(248, 249, 250, 0.95) !important;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(189, 189, 189, 0.3);
}

.empty-suggestions li {
    background: rgba(189, 189, 189, 0.1) !important;
}

.empty-suggestions li:hover {
    background: rgba(255, 152, 0, 0.1) !important;
    border-left: 3px solid #FF9800 !important;
}

:root {
    /* Paleta Principal - Minimalista Laranja */
    --vibrant-orange: #FF9800 !important;
    --vibrant-orange-light: #FFB74D !important;
    --vibrant-orange-dark: #F57C00 !important;
    --dark-neutral: #2E2E2E !important;
    --dark-neutral-light: #424242 !important;
    --medium-neutral: #757575 !important;
    --light-neutral: #BDBDBD !important;
    --pure-white: #FFFFFF !important;
    --neutral-bg: rgba(248, 249, 250, 1) !important;
    
    /* Cores de Sistema */
    --warning-orange: #FF9800;
    --warning-orange-light: #FFB74D;
    --danger-red: #F44336;
    --danger-red-light: #EF5350;
    
    /* Aplicação das Cores */
    --primary-color: var(--vibrant-orange) !important;
    --primary-color-light: var(--vibrant-orange-light) !important;
    --primary-color-dark: var(--vibrant-orange-dark) !important;
    --success-color: var(--vibrant-orange) !important;
    --success-color-light: var(--vibrant-orange-light) !important;
    --success-color-dark: var(--vibrant-orange-dark) !important;
    --danger-red: var(--danger-red);
    --danger-red-light: var(--danger-red-light);
    
    /* Backgrounds e Superfícies */
    --paper-bg: var(--pure-white);
    --paper-bg-alt: var(--neutral-bg);
    --paper-shadow: rgba(46, 46, 46, 0.1);
    --paper-shadow-hover: rgba(46, 46, 46, 0.15);
    
    /* Textos */
    --text-primary: var(--dark-neutral) !important;
    --text-secondary: var(--medium-neutral) !important;
    --text-disabled: var(--light-neutral) !important;
    --text-contrast: var(--pure-white) !important;
    
    /* Bordas e Divisores */
    --border-light: #E0E0E0;
    --border-medium: #BDBDBD;
    --border-dark: rgba(46, 46, 46, 0.2);
    
    /* Backgrounds de Layout */
    --background-primary: #F8F9FA;
    --background-secondary: #F1F3F4;
    --background-accent: rgba(33, 150, 243, 0.05);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #F8F9FA 0%, #F1F3F4 100%) !important;
    background-attachment: fixed;
    color: #2E2E2E !important;
    padding-bottom: 80px;
    min-height: 100vh;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(33, 150, 243, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(76, 175, 80, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(46, 46, 46, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}
.app-logo {
    width: 80px;       /* controla o tamanho */
    height: auto;
}
.logo-title {
    display: flex;
    align-items: center;
    gap: 12px;         /* espaço entre logo e título */
    justify-content: center;
}

.logo-title h1 {
    font-size: 2rem;
    color: var(--primary-blue, #2196F3);
    margin: 0;
}

.app-header {
    background: var(--paper-bg);
    padding: 1rem;
    box-shadow: 0 2px 8px var(--paper-shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 3px solid var(--primary-blue);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 800px;
    margin: 0 auto;
}

.language-selector {
    position: relative;
}

.language-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--paper-bg);
    border: 2px solid var(--border-light);
    border-radius: 8px;
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.language-btn:hover {
    border-color: var(--electric-blue);
    background: rgba(33, 150, 243, 0.05);
}

.language-btn .flag {
    font-size: 1.2rem;
}

.language-btn i {
    color: var(--text-secondary);
    transition: transform 0.2s ease;
}

.language-btn.active i {
    transform: rotate(180deg);
}

.language-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--paper-bg);
    border: 2px solid var(--border-light);
    border-radius: 8px;
    box-shadow: 0 4px 12px var(--paper-shadow);
    min-width: 150px;
    z-index: 1000;
    margin-top: 0.5rem;
}

.language-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.75rem 1rem;
    background: none;
    border: none;
    cursor: pointer;
    transition: background 0.2s ease;
    font-size: 0.9rem;
    text-align: left;
}

.language-option:hover {
    background: rgba(33, 150, 243, 0.05);
}

.language-option:first-child {
    border-radius: 6px 6px 0 0;
}

.language-option:last-child {
    border-radius: 0 0 6px 6px;
}

.language-option .flag {
    font-size: 1.1rem;
}

.language-option span:last-child {
    color: var(--text-primary);
}

.app-header h1 {
    color: var(--primary-blue);
    font-size: 1.5rem;
    font-weight: 700;
}

.app-main {
    padding: 1rem;
    max-width: 800px;
    margin: 0 auto;
}

.screen {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.screen.active {
    display: block;
}

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

.welcome-card {
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.04), rgba(76, 175, 80, 0.04));
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 6px 30px var(--paper-shadow);
    margin-bottom: 2rem;
    border: 1px solid rgba(33, 150, 243, 0.15);
    position: relative;
    text-align: center;
    overflow: hidden;
}

.welcome-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, var(--electric-blue), var(--vibrant-green), var(--warning-amber));
    border-radius: 20px 20px 0 0;
}

.welcome-card h2 {
    margin-bottom: 2rem;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.form-container, .screen-header, .stats-card {
    background: var(--paper-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--paper-shadow);
    margin-bottom: 1rem;
    border: 1px solid var(--border-light);
    position: relative;
}

.form-container::before, .stats-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--success-green), var(--warning-amber));
    border-radius: 12px 12px 0 0;
}

.screen-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
}

.screen-header h2 {
    color: var(--primary-blue);
    font-size: 1.4rem;
}

.challenges-grid, .templates-grid, .achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.challenge-card, .template-card, .achievement-card {
    background: var(--paper-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 3px 10px var(--paper-shadow);
    border-left: 4px solid var(--primary-blue);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.challenge-card:hover, .template-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--paper-shadow-hover);
}

.challenge-card.completed {
    border-left-color: var(--success-green);
    background: linear-gradient(135deg, rgba(102, 187, 106, 0.1) 0%, rgba(102, 187, 106, 0.05) 100%);
}

.challenge-card.expired {
    border-left-color: var(--danger-red);
    background: linear-gradient(135deg, rgba(239, 83, 80, 0.1) 0%, rgba(239, 83, 80, 0.05) 100%);
}

.challenge-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.challenge-description {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.challenge-progress {
    margin: 1rem 0;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border-light);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--electric-blue), var(--vibrant-green));
    border-radius: 4px;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
}

.challenge-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.progress-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.progress-btn {
    background: var(--electric-blue);
    color: var(--text-contrast);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.2rem;
    transition: background 0.2s ease, transform 0.1s ease;
    box-shadow: 0 2px 8px rgba(33, 150, 243, 0.2);
}

.progress-btn:hover {
    background: var(--electric-blue-dark);
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.3);
}

.progress-btn:active {
    transform: scale(0.95);
}

.progress-value {
    background: var(--paper-bg);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    border: 2px solid var(--border-light);
    font-weight: 600;
    min-width: 60px;
    text-align: center;
}

.primary-btn, .secondary-btn, .danger-btn, .success-btn {
    padding: 0.875rem 2rem;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    min-height: 48px;
}

.primary-btn {
    background: linear-gradient(135deg, var(--electric-blue), var(--electric-blue-light));
    color: var(--text-contrast);
    box-shadow: 0 4px 15px rgba(33, 150, 243, 0.25);
    text-shadow: 0 1px 2px rgba(46, 46, 46, 0.1);
    font-weight: 600;
}

.primary-btn:before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.primary-btn:hover:before {
    left: 100%;
}

.primary-btn:hover {
    background: linear-gradient(135deg, var(--electric-blue-dark), var(--electric-blue));
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(33, 150, 243, 0.35);
}

.primary-btn:active {
    transform: translateY(0);
    box-shadow: 0 4px 15px rgba(33, 150, 243, 0.25);
}

/* Botão especial para criar desafio */
#create-challenge-btn {
    background: linear-gradient(135deg, var(--vibrant-green), var(--vibrant-green-light));
    font-size: 1.1rem;
    padding: 1.25rem 2.5rem;
    border-radius: 16px;
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.3);
    margin-top: 1rem;
    animation: pulse 2s infinite;
    color: var(--text-contrast);
    text-shadow: 0 1px 2px rgba(46, 46, 46, 0.1);
}

#create-challenge-btn:hover {
    background: linear-gradient(135deg, var(--vibrant-green-dark), var(--vibrant-green));
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(76, 175, 80, 0.4);
    animation: none;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 6px 20px rgba(76, 175, 80, 0.3);
    }
    50% {
        box-shadow: 0 8px 25px rgba(76, 175, 80, 0.4);
    }
}

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

.secondary-btn:hover {
    background: var(--border-medium);
}

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

.success-btn:hover {
    background: var(--success-green-light);
}

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

.danger-btn:hover {
    background: var(--danger-red-light);
}

.challenge-form {
    max-width: 500px;
    margin: 0 auto;
}

.challenge-form h3 {
    color: var(--primary-blue);
    margin-bottom: 1.5rem;
    text-align: center;
}

.challenge-form input, .challenge-form textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-light);
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 1rem;
    transition: border-color 0.2s ease;
}

.challenge-form input:focus, .challenge-form textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.challenge-form textarea {
    resize: vertical;
    min-height: 80px;
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1.5rem;
}

.templates-container {
    margin-top: 2rem;
}

.templates-container h3 {
    color: var(--electric-blue);
    margin-bottom: 1rem;
}

.template-card {
    border-left-color: var(--vibrant-green);
    cursor: pointer;
}

.template-card:hover {
    border-left-color: var(--electric-blue);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.stat-item {
    text-align: center;
    padding: 1rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 8px;
    border: 1px solid var(--border-light);
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--electric-blue);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

#progress-chart {
    width: 100%;
    max-width: 400px;
    height: 200px;
    margin: 1rem auto;
    display: block;
    background: var(--paper-bg);
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--paper-shadow);
}

.achievement-card {
    border-left-color: var(--warning-amber);
    text-align: center;
}

.achievement-card.unlocked {
    border-left-color: var(--vibrant-green);
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.1) 0%, rgba(76, 175, 80, 0.05) 100%);
}

.achievement-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.achievement-card.unlocked .achievement-icon {
    animation: bounce 0.5s ease-in-out;
}

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% { transform: translate3d(0,0,0); }
    40%, 43% { transform: translate3d(0, -8px, 0); }
    70% { transform: translate3d(0, -4px, 0); }
    90% { transform: translate3d(0, -2px, 0); }
}

.profile-container {
    max-width: 400px;
    margin: 0 auto;
}

.profile-card {
    text-align: center;
    margin-bottom: 2rem;
}

.profile-avatar {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.profile-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-section {
    background: transparent;
    padding: 2rem 0;
    margin: 3rem 0;
}

.faq-section h2 {
    color: var(--primary-blue);
    margin-bottom: 2rem;
    text-align: center;
    font-size: 1.8rem;
    font-weight: 700;
}

.faq-category {
    background: var(--paper-bg);
    border-radius: 16px;
    box-shadow: 0 4px 20px var(--paper-shadow);
    margin-bottom: 2rem;
    border: 1px solid var(--border-light);
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.faq-category:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--paper-shadow-hover);
}

.faq-category h3 {
    background: linear-gradient(135deg, var(--electric-blue), var(--electric-blue-light));
    color: var(--text-contrast);
    padding: 1.5rem;
    margin: 0;
    font-size: 1.2rem;
    font-weight: 600;
    text-align: center;
    border: none;
    text-shadow: 0 1px 2px rgba(46, 46, 46, 0.1);
}

.faq-item {
    border-bottom: 1px solid var(--border-light);
    background: var(--paper-bg);
    transition: background 0.2s ease;
}

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

.faq-item:hover {
    background: var(--paper-bg-alt);
}

.faq-question {
    width: 100%;
    padding: 1.5rem;
    background: none;
    border: none;
    text-align: left;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease;
    position: relative;
}

.faq-question:hover {
    color: var(--electric-blue);
    padding-left: 2rem;
}

.faq-question:before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 0;
    background: var(--electric-blue);
    transition: height 0.2s ease;
}

.faq-question:hover:before {
    height: 60%;
}

.faq-icon {
    font-size: 1.4rem;
    color: var(--electric-blue);
    transition: transform 0.3s ease;
    font-weight: bold;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: rgba(33, 150, 243, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
    background: var(--electric-blue);
    color: var(--text-contrast);
}

.faq-answer {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-secondary);
    line-height: 1.7;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    background: rgba(33, 150, 243, 0.02);
    border-top: 1px solid var(--border-light);
}

.faq-answer[hidden] {
    display: block;
    max-height: 0;
    padding-bottom: 0;
    border-top: none;
}

.faq-answer:not([hidden]) {
    max-height: 300px;
}

.faq-answer p {
    margin: 0;
    font-size: 1rem;
}

.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--paper-bg);
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: space-around;
    padding: 0.5rem 0;
    box-shadow: 0 -2px 8px var(--paper-shadow);
    z-index: 1000;
    
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--text-secondary);
    padding: 0.5rem;
    transition: color 0.2s ease;
    min-width: 60px;
}

.nav-item i {
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
}

.nav-item span {
    font-size: 0.7rem;
    font-weight: 500;
}

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

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

footer {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
    background: var(--paper-bg);
    border-top: 1px solid var(--border-light);
    margin-top: 2rem;
  
}
footer a {
    color: #2196F3;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

footer a:hover {
    color: #1565c0;
    text-decoration: underline;
}


.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-content {
    background: var(--paper-bg);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    max-width: 500px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-light);
}

.modal-header h3 {
    color: var(--primary-blue);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.2s ease;
}

.modal-close:hover {
    background: var(--border-light);
}

.modal-body {
    padding: 1.5rem;
}

.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--success-green);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    z-index: 3000;
    animation: slideInRight 0.3s ease, slideOutRight 0.3s ease 2.7s forwards;
}

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

.toast.warning {
    background: var(--warning-amber);
    color: var(--text-primary);
}

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOutRight {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(100%); opacity: 0; }
}

@media (max-width: 768px) {
    .app-main {
        padding: 0.5rem;
    }
    
    .welcome-card {
        padding: 2rem 1.5rem;
    }
    
    .welcome-card h2 {
        font-size: 1.5rem;
    }
    
    #create-challenge-btn {
        padding: 1rem 2rem;
        font-size: 1rem;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .header-actions {
        flex-direction: column;
        gap: 1rem;
    }
    
    .language-selector {
        order: -1;
    }
    
    .challenges-grid, .templates-grid {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .challenge-actions {
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .faq-category h3 {
        font-size: 1.1rem;
        padding: 1.25rem;
    }
    
    .faq-question {
        padding: 1.25rem;
        font-size: 1rem;
    }
    
    .faq-answer {
        padding: 0 1.25rem 1.25rem;
    }
}

@media (max-width: 480px) {
    .app-header h1 {
        font-size: 1.2rem;
    }
    
    .welcome-card {
        padding: 1.5rem 1rem;
    }
    
    .welcome-card h2 {
        font-size: 1.3rem;
    }
    
    #create-challenge-btn {
        padding: 0.875rem 1.5rem;
        font-size: 0.95rem;
    }
    
    .empty-state {
        padding: 2rem 1rem;
    }
    
    .empty-icon {
        font-size: 3rem;
    }
    
    .empty-suggestions ul {
        grid-template-columns: 1fr;
    }
    
    .header-content {
        gap: 0.5rem;
    }
    
    .header-actions {
        flex-direction: row;
        justify-content: center;
        gap: 1rem;
    }
    
    .language-btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }
    
    .screen-header {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-item span {
        font-size: 0.6rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .faq-section h2 {
        font-size: 1.5rem;
    }
    
    .faq-category h3 {
        font-size: 1rem;
        padding: 1rem;
    }
    
    .faq-question {
        padding: 1rem;
        font-size: 0.95rem;
    }
    
    .faq-answer {
        padding: 0 1rem 1rem;
        font-size: 0.9rem;
    }
}