:root {
    --primary: #2c3e50;
    --secondary: #3498db;
    --success: #27ae60;
    --warning: #f39c12;
    --danger: #e74c3c;
    --light: #ecf0f1;
    --dark: #34495e;
    --whatsapp: #25D366;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f7fa;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header */
header {
    background-color: var(--primary);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-logout {
    background: var(--danger);
    color: white;
    border: none;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

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

/* Navigation */
nav {
    background-color: var(--dark);
}

.nav-menu {
    display: flex;
    list-style: none;
}

.nav-menu li {
    padding: 15px 20px;
    cursor: pointer;
    transition: background 0.3s;
}

.nav-menu li:hover, .nav-menu li.active {
    background-color: var(--secondary);
}

.nav-menu li a {
    color: white;
    text-decoration: none;
    display: block;
}

/* Main Content */
main {
    padding: 20px 0;
    min-height: calc(100vh - 140px);
}

.page {
    display: none;
}

.page.active {
    display: block;
}

/* Cards */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.card h3 {
    font-size: 1rem;
    margin-bottom: 10px;
    color: var(--dark);
}

.card .number {
    font-size: 2rem;
    font-weight: bold;
}

.card.total-clients {
    border-top: 4px solid var(--secondary);
}

.card.active-clients {
    border-top: 4px solid var(--success);
}

.card.overdue-clients {
    border-top: 4px solid var(--danger);
}

/* Tables */
.table-container {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin-bottom: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

th {
    background-color: var(--light);
    font-weight: 600;
}

tr:hover {
    background-color: #f9f9f9;
}

/* Forms */
.form-container {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    max-width: 800px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

input, select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

/* Buttons */
.btn {
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

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

.btn-primary:hover:not(:disabled) {
    background: #2980b9;
    transform: translateY(-1px);
}

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

.btn-success:hover:not(:disabled) {
    background: #219a52;
}

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

.btn-danger:hover:not(:disabled) {
    background: #c82333;
    transform: translateY(-1px);
}

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

.btn-warning:hover:not(:disabled) {
    background: #e67e22;
}

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

.btn-whatsapp:hover:not(:disabled) {
    background: #1da851;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.85rem;
}

/* Login Page */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.login-box {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
    width: 100%;
    max-width: 400px;
}

.login-box h2 {
    text-align: center;
    margin-bottom: 20px;
    color: var(--dark);
}

/* Footer */
footer {
    background-color: var(--primary);
    color: white;
    text-align: center;
    padding: 15px 0;
    margin-top: 30px;
}

/* Status badges */
.status {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
    display: inline-block;
}

.status.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.status.danger {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f1b0b7;
}

.status.warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

/* WhatsApp Status */
.whatsapp-status {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid var(--dark);
}

.status-indicator {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-connected {
    background-color: var(--whatsapp);
    box-shadow: 0 0 15px rgba(37, 211, 102, 0.5);
}

.status-disconnected {
    background-color: var(--danger);
    box-shadow: 0 0 15px rgba(231, 76, 60, 0.5);
}

.status-text {
    font-size: 1.1rem;
    font-weight: 500;
}

.qrcode-container {
    text-align: center;
    margin-top: 20px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
}

.qrcode-image {
    max-width: 300px;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 10px;
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

#qrcode-info {
    margin-bottom: 15px;
    padding: 12px;
    background: white;
    border-radius: 6px;
    border-left: 4px solid var(--secondary);
}

#qrcode-info p {
    margin: 5px 0;
    font-size: 0.9rem;
}

@keyframes pulse {
    0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7);
    }
    
    70% {
        transform: scale(1);
        box-shadow: 0 0 0 12px rgba(37, 211, 102, 0);
    }
    
    100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0);
    }
}

/* Tabs */
.tabs {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 1px solid #ddd;
}

.tab {
    padding: 10px 20px;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.3s;
}

.tab.active {
    border-bottom-color: var(--secondary);
    color: var(--secondary);
    font-weight: 500;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Status Details */
#status-details {
    margin-top: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    border: 1px solid #e9ecef;
}

#status-details h3 {
    margin-bottom: 10px;
    color: var(--dark);
}

#status-details-content {
    background: white;
    padding: 15px;
    border-radius: 4px;
    overflow: auto;
    font-size: 0.85rem;
    border: 1px solid #e9ecef;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        flex-direction: column;
    }
    
    .cards {
        grid-template-columns: 1fr;
    }
    
    .table-container {
        overflow-x: auto;
    }
    
    .btn-group {
        flex-direction: column;
    }
    
    .whatsapp-status {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .header-content {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
    
    .container {
        padding: 0 10px;
    }
    
    th, td {
        padding: 8px 10px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .login-box {
        margin: 20px;
        padding: 20px;
    }
    
    .form-container {
        padding: 15px;
    }
    
    .qrcode-image {
        max-width: 250px;
    }
    
    .btn {
        padding: 8px 12px;
        font-size: 0.9rem;
    }
}

/* Loading states */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

/* Success/Error messages */
.alert {
    padding: 12px 15px;
    border-radius: 4px;
    margin-bottom: 15px;
    border-left: 4px solid;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border-color: #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border-color: #f1b0b7;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border-color: #ffeaa7;
}

/* Modal Styles */
.form-container {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    max-width: 800px;
    margin: 0 auto;
}

/* Para modais com scroll */
.form-container.scrollable {
    max-height: 80vh;
    overflow-y: auto;
}

/* Fechar modal ao clicar fora */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}