/* ============================================
   Melhorias Adicionais UX/UI
   ============================================ */

/* ===== Botão Voltar ao Topo Melhorado ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 9999;
    text-decoration: none;
    border: 3px solid white;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.6);
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

.back-to-top i {
    font-size: 1.25rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-5px);
    }
    60% {
        transform: translateY(-3px);
    }
}

/* ===== Compartilhamento Social ===== */
.social-share {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 2px solid #e9ecef;
}

.social-share-label {
    font-weight: 600;
    color: #333;
    margin-right: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.social-share-btn {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    font-size: 1.1rem;
}

.social-share-btn:hover {
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.25);
    color: white;
}

.social-share-btn.facebook {
    background: #1877f2;
}

.social-share-btn.twitter {
    background: #1da1f2;
}

.social-share-btn.whatsapp {
    background: #25d366;
}

.social-share-btn.linkedin {
    background: #0077b5;
}

.social-share-btn.email {
    background: #666;
}

.social-share-btn.copy-link {
    background: #6c757d;
}

/* ===== FAQ Inline ===== */
.faq-section {
    margin-top: 3rem;
    padding-top: 3rem;
    border-top: 2px solid #e9ecef;
}

.faq-title {
    font-size: 2rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 2rem;
    text-align: center;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: 12px;
    margin-bottom: 1rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.faq-item:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    border-color: #007bff;
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: #333;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.faq-question:hover {
    color: #007bff;
}

.faq-question i {
    color: #007bff;
    transition: transform 0.3s ease;
    font-size: 1.25rem;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 1.5rem;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 1.5rem 1.5rem 1.5rem;
}

.faq-answer-content {
    color: #666;
    line-height: 1.8;
    padding-top: 1rem;
}

/* ===== QR Code para Check-in ===== */
.qr-code-section {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    margin-top: 2rem;
}

.qr-code-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 1rem;
}

.qr-code-container {
    display: inline-block;
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    margin-bottom: 1rem;
}

.qr-code-container img {
    max-width: 200px;
    height: auto;
}

.qr-code-info {
    font-size: 0.9rem;
    color: #666;
    margin-top: 1rem;
}

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

.qr-code-btn {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: 2px solid transparent;
}

.qr-code-btn-primary {
    background: #007bff;
    color: white;
}

.qr-code-btn-primary:hover {
    background: #0056b3;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
    color: white;
}

.qr-code-btn-secondary {
    background: white;
    color: #007bff;
    border-color: #007bff;
}

.qr-code-btn-secondary:hover {
    background: #007bff;
    color: white;
}

/* ===== Modo Escuro (Dark Mode) ===== */
.dark-mode-toggle {
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: #333;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 9998;
    border: 3px solid white;
}

.dark-mode-toggle:hover {
    transform: scale(1.1);
    background: #555;
}

.dark-mode-toggle i {
    font-size: 1.25rem;
}

/* Dark Mode Styles */
body.dark-mode {
    background: #1a1a1a;
    color: #e0e0e0;
}

body.dark-mode .event-card,
body.dark-mode .lote-card,
body.dark-mode .checkout-summary,
body.dark-mode .checkout-form-container,
body.dark-mode .registration-card,
body.dark-mode .faq-item {
    background: #2d2d2d;
    color: #e0e0e0;
    border-color: #444;
}

body.dark-mode .event-card-title,
body.dark-mode .registration-event-name,
body.dark-mode .faq-question {
    color: #fff;
}

body.dark-mode .event-card-info-item,
body.dark-mode .registration-info-item {
    color: #b0b0b0;
}

body.dark-mode .filter-tab,
body.dark-mode .btn-filter-clear {
    background: #333;
    color: #e0e0e0;
    border-color: #555;
}

body.dark-mode .filter-tab.active {
    background: #007bff;
    color: white;
}

/* ===== Responsividade ===== */
@media (max-width: 768px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
    
    .dark-mode-toggle {
        bottom: 80px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
    
    .social-share {
        justify-content: center;
    }
    
    .qr-code-actions {
        flex-direction: column;
    }
    
    .qr-code-btn {
        width: 100%;
        justify-content: center;
    }
}