:root {
    --primary-blue: #6A8EAE;
    --primary-blue-dark: #5A7B9C;
    --secondary-light: #DCE2E8;
    --accent-green: #A8DADC;
    --text-dark: #333333;
    --text-muted: #6B7280;
    --background-light: #F8F9FA;
    --error-red: #dc3545;
    --success-green: #28a745;
}

* { box-sizing: border-box; }

body {
    font-family: 'Open Sans', sans-serif;
    background-color: var(--background-light);
    margin: 0;
    padding: 0;
    color: var(--text-dark);
    line-height: 1.6;
}

main {
    max-width: 1280px;
    margin: 30px auto;
    padding: 0 24px 60px;
}

/* Cabeçalho da página */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 24px;
}

.page-header h1 {
    color: var(--primary-blue);
    font-size: 2.2em;
    font-weight: 700;
    margin: 0 0 6px 0;
}

.page-subtitle {
    margin: 0;
    color: var(--text-muted);
    font-size: 1.02em;
    max-width: 640px;
}

/* Mensagem */
.mensagem {
    margin: 0 0 18px;
    padding: 12px 16px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.98em;
}

.mensagem.sucesso {
    color: var(--success-green);
    background-color: #e6ffed;
    border: 1px solid #b2dfc9;
}

.mensagem.erro {
    color: var(--error-red);
    background-color: #ffe6e6;
    border: 1px solid #f5c6cb;
}

/* Filtros */
.filter-bar {
    background-color: #fff;
    border-radius: 12px;
    padding: 20px 24px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
    margin-bottom: 18px;
}

.filter-form {
    display: grid;
    grid-template-columns: minmax(180px, 1fr) minmax(220px, 1.4fr) auto;
    gap: 16px;
    align-items: end;
}

.filter-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.filter-field label {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.92em;
    letter-spacing: 0.01em;
}

.filter-field input[type="month"],
.filter-field select {
    padding: 11px 14px;
    border: 1px solid var(--secondary-light);
    border-radius: 8px;
    background-color: #fff;
    font-size: 0.97em;
    color: var(--text-dark);
    font-family: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.filter-field input[type="month"]:focus,
.filter-field select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(106, 142, 174, 0.18);
}

.filter-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

/* Botões */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 22px;
    border-radius: 8px;
    border: 1px solid transparent;
    font-size: 0.98em;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    font-family: inherit;
    transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
}

.btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-primary {
    background-color: var(--primary-blue);
    color: #fff;
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-blue-dark);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(106, 142, 174, 0.25);
}

.btn-secondary {
    background-color: #fff;
    color: var(--primary-blue);
    border-color: var(--secondary-light);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--background-light);
    border-color: var(--primary-blue);
    transform: translateY(-1px);
}

/* Painel */
.panel {
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
    overflow: hidden;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 12px;
    padding: 20px 24px;
    border-bottom: 1px solid var(--secondary-light);
}

.panel-header h2 {
    margin: 0;
    color: var(--text-dark);
    font-size: 1.3em;
    font-weight: 700;
}

.panel-subtitle {
    margin: 4px 0 0;
    color: var(--text-muted);
    font-size: 0.92em;
}

/* Tabela */
.table-wrapper {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.96em;
}

.data-table thead th {
    background-color: var(--background-light);
    color: var(--text-muted);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.78em;
    letter-spacing: 0.05em;
    padding: 14px 18px;
    text-align: left;
    border-bottom: 1px solid var(--secondary-light);
    white-space: nowrap;
}

.data-table thead th:not(:first-child) {
    text-align: right;
}

.data-table tbody tr {
    transition: background-color 0.2s ease;
}

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

.data-table tbody td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--secondary-light);
    vertical-align: middle;
}

.data-table tbody td:not(:first-child) {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.data-table tbody td:first-child {
    font-weight: 600;
    color: var(--text-dark);
}

.row-empty td,
.row-loading td {
    text-align: center !important;
    color: var(--text-muted);
    font-style: italic;
    font-weight: 400 !important;
    padding: 32px 18px !important;
}

/* Responsividade */
@media (max-width: 860px) {
    .filter-form {
        grid-template-columns: 1fr 1fr;
    }
    .filter-actions {
        grid-column: 1 / -1;
        justify-content: stretch;
    }
    .filter-actions .btn {
        flex: 1;
    }
}

@media (max-width: 720px) {
    main { padding: 0 16px 40px; }
    .page-header h1 { font-size: 1.7em; }
    .filter-bar { padding: 16px 18px; }
    .panel-header { padding: 16px 18px; }
    .data-table thead th,
    .data-table tbody td {
        padding: 11px 14px;
    }
}

@media (max-width: 520px) {
    .filter-form {
        grid-template-columns: 1fr;
    }
}