/* --- VARIÁVEIS GLOBAIS DE CORES --- */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --accent-color: #2980b9;
    --success-color: #27ae60;
    --danger-color: #c0392b;
    --warning-color: #f39c12;
    --bg-color: #f4f7f6;
    --card-bg: #ffffff;
    --text-color: #333333;
    --border-color: #e0e0e0;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px;
}

/* --- ECRÃ DE AUTENTICAÇÃO (LOGIN / REGISTO) --- */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 35px 30px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    border-top: 5px solid var(--primary-color);
}

/* BOTÃO GOOGLE AUTH */
.btn-google {
    width: 100%;
    padding: 11px 16px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: #ffffff;
    color: #3c4043;
    font-size: 0.95em;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

.btn-google:hover {
    background-color: #f8f9fa;
    box-shadow: 0 1px 3px rgba(60, 64, 67, 0.15);
}

/* SEPARADOR VISUAL */
.auth-separator {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 20px 0;
    color: #888;
    font-size: 0.85em;
}

.auth-separator::before,
.auth-separator::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border-color);
}

.auth-separator span {
    padding: 0 10px;
}

/* --- BARRA DO UTILIZADOR AUTENTICADO --- */
.user-bar {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

/* --- CABEÇALHO E LOGÓTIPO --- */
header {
    text-align: center;
    margin-bottom: 25px;
}

header .logo-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.header-logo {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

header h1 {
    color: var(--primary-color);
    font-size: 2em;
}

header p {
    color: #666;
    font-size: 0.95em;
    margin-top: 4px;
}

/* --- CARDS DE RESUMO FINANCEIRO --- */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 15px;
    margin-bottom: 25px;
}

.card {
    background: var(--card-bg);
    border-radius: 10px;
    padding: 15px 20px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    border-top: 4px solid var(--primary-color);
}

.card h3 {
    font-size: 0.85em;
    color: #666;
    margin-bottom: 5px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card span {
    font-size: 1.4em;
    font-weight: bold;
}

.card-receber { border-top-color: var(--success-color); }
.card-receber span { color: var(--success-color); }

.card-pagar { border-top-color: var(--danger-color); }
.card-pagar span { color: var(--danger-color); }

.card-recebido { border-top-color: #00b894; }
.card-recebido span { color: #00b894; }

.card-saldo { border-top-color: var(--accent-color); }
.card-saldo span { color: var(--primary-color); }

/* --- NAVEGAÇÃO POR SEPARADORES --- */
.nav-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

.tab-btn {
    flex: 1;
    padding: 12px;
    background: #e0e6ed;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    color: var(--secondary-color);
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.tab-btn:hover {
    background: #d0d7de;
}

.tab-btn.active {
    background: var(--primary-color);
    color: #ffffff;
}

/* CONTEÚDO DOS SEPARADORES */
.tab-content {
    display: none;
}

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

/* --- SECÇÕES E FORMULÁRIOS --- */
.form-section, .list-section {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    margin-bottom: 25px;
}

h2 {
    font-size: 1.2em;
    color: var(--primary-color);
    margin-bottom: 15px;
    border-bottom: 2px solid var(--bg-color);
    padding-bottom: 8px;
}

.form-group {
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

label {
    font-weight: 600;
    font-size: 0.85em;
    margin-bottom: 5px;
    color: var(--secondary-color);
}

input, select {
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.95em;
    outline: none;
}

input:focus, select:focus {
    border-color: var(--accent-color);
}

/* BOTÕES DE GRAVAÇÃO */
.btn-salvar {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 6px;
    color: #ffffff;
    font-weight: bold;
    font-size: 1em;
    cursor: pointer;
    transition: background 0.3s ease;
}

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

.btn-receber { background-color: var(--success-color); }
.btn-receber:hover { background-color: #219150; }

/* --- TABELAS RESPONSIVAS --- */
.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9em;
}

th {
    background-color: var(--primary-color);
    color: #ffffff;
}

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

/* BADGES DE ESTADO */
.badge {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75em;
    font-weight: bold;
    display: inline-block;
}

.badge.pendente {
    background-color: #fde8e8;
    color: var(--danger-color);
}

.badge.pago {
    background-color: #e8f8f0;
    color: var(--success-color);
}

/* BOTÕES DE AÇÃO (BAIXA / EDITAR / ELIMINAR) */
.btn-baixa {
    padding: 6px 10px;
    border: none;
    border-radius: 4px;
    background-color: var(--accent-color);
    color: #ffffff;
    font-size: 0.8em;
    cursor: pointer;
    margin-right: 4px;
}

.btn-baixa:hover {
    opacity: 0.9;
}

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

.btn-editar:hover {
    background-color: #d68910;
}

/* --- MÓDULO DE RELATÓRIOS E GRÁFICOS --- */
.reports-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.report-card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.report-card h3 {
    font-size: 1em;
    color: var(--primary-color);
    margin-bottom: 15px;
    text-align: center;
}

.report-card-full {
    grid-column: 1 / -1;
}

.chart-container {
    position: relative;
    width: 100%;
    height: 260px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* --- MODAL UNIVERSAL DE EDIÇÃO --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 15px;
}

.modal-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 25px;
    width: 100%;
    max-width: 520px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--bg-color);
    padding-bottom: 12px;
    margin-bottom: 20px;
}

.btn-fechar-modal {
    background: transparent;
    border: none;
    font-size: 1.8em;
    color: #888;
    cursor: pointer;
    line-height: 1;
}

.btn-fechar-modal:hover {
    color: var(--danger-color);
}

/* --- RESPONSIVIDADE PARA DISPOSITIVOS MÓVEIS (PWA) --- */
@media (max-width: 600px) {
    .container {
        padding: 10px;
    }

    header h1 {
        font-size: 1.5em;
    }

    .header-logo {
        width: 34px;
        height: 34px;
        border-radius: 8px;
    }

    .summary-cards {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    .card {
        padding: 10px;
    }

    .card h3 {
        font-size: 0.7em;
    }

    .card span {
        font-size: 1.1em;
    }

    .nav-tabs {
        flex-wrap: nowrap;
        overflow-x: auto;
        padding-bottom: 8px;
        -webkit-overflow-scrolling: touch;
    }

    .tab-btn {
        flex: 0 0 auto;
        min-width: 110px;
        font-size: 0.85em;
        padding: 10px 12px;
    }

    .form-section, .list-section, .report-card {
        padding: 12px;
    }

    .chart-container {
        height: 220px;
    }
}