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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 20px;
}

.login-container {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    max-width: 400px;
    width: 100%;
}

.login-container h1 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #555;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

button, .btn {
    padding: 12px 24px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
}

.btn-primary {
    background: #667eea;
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background: #5568d3;
}

.btn-success {
    background: #28a745;
    color: white;
}

.btn-success:hover {
    background: #218838;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

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

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
}

.dashboard-container {
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    padding: 20px;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background: white;
    border-radius: 10px;
    margin-bottom: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header h1 {
    color: #333;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.stat-card h3 {
    color: #666;
    font-size: 14px;
    margin-bottom: 10px;
}

.stat-card .number {
    font-size: 32px;
    font-weight: bold;
    color: #667eea;
}

.nav-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 2px solid #ddd;
    padding-bottom: 10px;
}

.nav-tabs button {
    background: transparent;
    color: #666;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    font-weight: 500;
    border-radius: 5px 5px 0 0;
}

.nav-tabs button.active {
    background: #667eea;
    color: white;
}

.content-section {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    display: none;
}

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

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

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

table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #333;
}

table tr:hover {
    background: #f8f9fa;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    padding: 30px;
    border-radius: 10px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-header h2 {
    color: #333;
}

.close-modal {
    background: transparent;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #999;
}

.alert {
    padding: 12px 20px;
    border-radius: 5px;
    margin-bottom: 20px;
}

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

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-blocked {
    background: #1a0a0a;
    color: #ff6b6b;
    border: 1px solid #c0392b;
    line-height: 1.6;
    font-size: 14px;
}

.qr-code-container {
    text-align: center;
    padding: 20px;
}

.qr-code-container img {
    max-width: 300px;
    margin: 20px auto;
}

.btn-group {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.status-badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.status-delivered {
    background: #d4edda;
    color: #155724;
}

.status-pending {
    background: #fff3cd;
    color: #856404;
}

.status-failed {
    background: #f8d7da;
    color: #721c24;
}

.whatsapp-status {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 5px;
    margin-bottom: 20px;
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.status-indicator.connected {
    background: #28a745;
}

.status-indicator.disconnected {
    background: #dc3545;
}

.loading {
    text-align: center;
    padding: 40px;
    color: #666;
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .header {
        flex-direction: column;
        gap: 15px;
    }

    .nav-tabs {
        overflow-x: auto;
        flex-wrap: nowrap;
    }

    table {
        font-size: 12px;
    }
}

.validation-results {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 15px;
}

.validation-result {
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid;
    background: #f8f9fa;
}

.validation-result.valid {
    border-left-color: #28a745;
    background: #d4edda;
}

.validation-result.invalid {
    border-left-color: #dc3545;
    background: #f8d7da;
}

.validation-result strong {
    display: inline-block;
    margin-right: 5px;
}