:root {
    --sidebar-width: 250px;
    --navbar-height: 60px;
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --accent-color: #3498db;
    --success-color: #2ecc71;
    --danger-color: #e74c3c;
    --warning-color: #f1c40f;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    color: var(--dark-color);
}

/* Navbar Styles */
.navbar {
    background-color: var(--primary-color);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    height: var(--navbar-height);
}

.navbar-brand {
    font-weight: 600;
    color: var(--light-color) !important;
}

.nav-link {
    color: var(--light-color) !important;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--accent-color) !important;
}

.nav-link.active {
    color: var(--accent-color) !important;
    font-weight: 600;
}

/* Container and Layout */
.dashboard-container {
    padding: 2rem 0;
}

.page-title {
    color: var(--primary-color);
    margin-bottom: 2rem;
    font-weight: 600;
    font-size: 1.75rem;
}

/* Card Styles */
.card {
    border: none;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    border-radius: 8px;
    margin-bottom: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

.card-header {
    background-color: white;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    padding: 1.25rem;
    font-weight: 500;
}

.card-title {
    color: var(--primary-color);
    margin: 0;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

/* Form Styles */
.search-form {
    background-color: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    margin-bottom: 2rem;
}

/* Table Styles */
.table {
    margin-bottom: 0;
    background-color: white;
}

.table th {
    background-color: #f8f9fa;
    color: var(--primary-color);
    font-weight: 600;
    border-bottom: 2px solid #dee2e6;
    padding: 1rem;
}

.table td {
    padding: 1rem;
    vertical-align: middle;
    border-bottom: 1px solid #dee2e6;
}

.table tbody tr:hover {
    background-color: #f8f9fa;
}

/* Status Styles */
.status-em-aberto, .em-aberto {
    color: var(--danger-color) !important;
    font-weight: 600;
}

.status-pago, .quitado {
    color: var(--success-color) !important;
    font-weight: 600;
}

.status-desistente {
    color: #95a5a6 !important;
    font-weight: 600;
}

.status-atrasado {
    color: var(--warning-color) !important;
    font-weight: 600;
}

/* Value Styles */
.valor-zero {
    color: var(--success-color) !important;
}

.valor-positivo {
    color: var(--accent-color) !important;
}

.valor-nulo {
    color: #7f8c8d !important;
    font-style: italic;
}

/* Button Styles */
.btn-primary {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background-color: #2980b9;
    border-color: #2980b9;
    transform: translateY(-2px);
}

/* DataTables Customization */
.dataTables_wrapper .dataTables_paginate .paginate_button.current {
    background: var(--accent-color) !important;
    border-color: var(--accent-color) !important;
    color: white !important;
}

.dataTables_wrapper .dataTables_paginate .paginate_button:hover {
    background: var(--secondary-color) !important;
    border-color: var(--secondary-color) !important;
    color: white !important;
}

/* Responsive Styles */
@media (max-width: 768px) {
    .dashboard-container {
        padding: 1rem 0;
    }
    
    .search-form {
        padding: 1rem;
    }
    
    .card {
        margin-bottom: 1rem;
    }
    
    .table-responsive {
        margin-bottom: 1rem;
        overflow-x: auto;
    }
    
    .page-title {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }
    
    .navbar-nav .nav-link i {
        font-size: 1.1rem;
        margin-right: 8px;
    }
    
    .navbar-nav .nav-item {
        border-bottom: 1px solid rgba(255,255,255,0.1);
        padding: 8px 0;
    }
    
    .navbar-toggler {
        border: 2px solid rgba(255,255,255,0.5);
        padding: 4px 8px;
    }
    
    .navbar-nav .nav-link {
        padding: 10px 15px;
    }
}

@media (max-width: 576px) {
    .container {
        padding-top: 10px;
    }
    
    .row {
        margin-left: -10px;
        margin-right: -10px;
    }
    
    .col, .col-md-6, .col-lg-4 {
        padding-left: 10px;
        padding-right: 10px;
    }
}

@media (max-width: 768px) {
    .form-group {
        margin-bottom: 15px;
    }
    
    .form-control {
        font-size: 16px;
    }
    
    .btn-block-xs {
        display: block;
        width: 100%;
        margin-bottom: 10px;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeIn 0.5s ease-out;
}