:root {
    --primary-color: #2196F3;
    --success-color: #4CAF50;
    --warning-color: #FFC107;
    --danger-color: #F44336;
    --purple-color: #9C27B0;
    --background-color: #f5f7fa;
    --card-background: #ffffff;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --border-color: #e1e8ed;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-hover: 0 4px 20px rgba(0,0,0,0.15);
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    padding-bottom: 80px;
}

.header {
    background: linear-gradient(135deg, var(--primary-color), #1976D2);
    color: white;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.add-client-btn {
    background: rgba(255,255,255,0.2);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    backdrop-filter: blur(10px);
}

.add-client-btn:hover {
    background: rgba(255,255,255,0.3);
    transform: translateY(-1px);
}

.main-content {
    padding: 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section {
    display: none;
}

.section.active {
    display: block;
}

.metrics-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.metric-card {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: var(--transition);
}

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

.metric-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.metric-card:nth-child(1) .metric-icon {
    background: var(--primary-color);
}

.metric-card:nth-child(2) .metric-icon {
    background: var(--danger-color);
}

.metric-card:nth-child(3) .metric-icon {
    background: var(--warning-color);
}

.metric-card:nth-child(4) .metric-icon {
    background: var(--success-color);
}

.metric-info h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.metric-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.filters-container {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
}

.filter-group {
    flex: 1;
    min-width: 200px;
}

.filter-select,
.filter-input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    transition: var(--transition);
    background: white;
}

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

.export-btn {
    background: var(--success-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    font-weight: 500;
}

.export-btn:hover {
    background: #45a049;
    transform: translateY(-1px);
}

.chart-container {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    height: 300px;
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
}

.client-card {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
    border-left: 4px solid var(--primary-color);
    position: relative;
}

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

.client-card.status-compliant {
    border-left-color: var(--success-color);
}

.client-card.status-pending {
    border-left-color: var(--warning-color);
}

.client-card.status-critical {
    border-left-color: var(--danger-color);
}

.client-card.status-expiring {
    border-left-color: var(--purple-color);
}

.client-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 1rem;
}

.client-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

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

.client-status {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
}

.status-compliant {
    background: rgba(76, 175, 80, 0.1);
    color: var(--success-color);
}

.status-pending {
    background: rgba(255, 193, 7, 0.1);
    color: #f57c00;
}

.status-critical {
    background: rgba(244, 67, 54, 0.1);
    color: var(--danger-color);
}

.status-expiring {
    background: rgba(156, 39, 176, 0.1);
    color: var(--purple-color);
}

.client-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin-top: 1rem;
}

.info-item {
    display: flex;
    flex-direction: column;
}

.info-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.info-value {
    font-weight: 500;
    font-size: 0.9rem;
}

.client-actions {
    position: absolute;
    top: 1rem;
    right: 1rem;
    opacity: 0;
    transition: var(--transition);
}

.client-card:hover .client-actions {
    opacity: 1;
}

.action-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    margin-left: 0.5rem;
    border-radius: 4px;
    transition: var(--transition);
}

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

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-content {
    background: var(--card-background);
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

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

.modal-header h3 {
    font-size: 1.2rem;
    font-weight: 600;
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0.25rem;
    border-radius: 4px;
    transition: var(--transition);
}

.close-modal:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.client-form {
    padding: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    transition: var(--transition);
    font-family: inherit;
}

.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 rgba(33, 150, 243, 0.1);
}

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

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
}

.btn-primary,
.btn-secondary {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background: #1976D2;
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background: #d5dbdb;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.back-btn {
    background: var(--border-color);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.back-btn:hover {
    background: #d5dbdb;
}

.client-details {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.detail-section {
    margin-bottom: 2rem;
}

.detail-section h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.detail-item {
    padding: 1rem;
    background: var(--background-color);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--primary-color);
}

.detail-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    font-weight: 500;
}

.detail-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.faq-section {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow);
}

.faq-section h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

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

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

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: 1rem 0;
    text-align: left;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

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

.faq-icon {
    font-size: 1.2rem;
    transition: var(--transition);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 0 1rem 0;
    color: var(--text-secondary);
    line-height: 1.6;
    overflow: hidden;
    transition: var(--transition);
}

.faq-answer[hidden] {
    display: none;
}

.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--card-background);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    padding: 0.5rem 0;
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
}

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

.nav-item:hover,
.nav-item.active {
    color: var(--primary-color);
    background: rgba(33, 150, 243, 0.1);
}

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

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

footer {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
    background: var(--card-background);
    border-top: 1px solid var(--border-color);
    margin-top: 2rem;
}

.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--border-color);
}

.empty-state h3 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .header {
        padding: 0.75rem 1rem;
    }
    
    .header h1 {
        font-size: 1.2rem;
    }
    
    .add-client-btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
    }
    
    .metrics-container {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 0.75rem;
    }
    
    .metric-card {
        padding: 1rem;
    }
    
    .metric-icon {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .metric-info h3 {
        font-size: 1.5rem;
    }
    
    .filters-container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-group {
        min-width: auto;
    }
    
    .clients-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .client-card {
        padding: 1rem;
    }
    
    .client-info {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        margin: 1rem;
        max-height: calc(100vh - 2rem);
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .detail-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: 0.5rem;
    }
    
    .metrics-container {
        grid-template-columns: 1fr 1fr;
    }
    
    .metric-card {
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }
    
    .chart-container {
        height: 250px;
        padding: 1rem;
    }
    
    .faq-section,
    .client-details {
        padding: 1rem;
    }
}