:root {
    --bg: #f5f7fa;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --border: #e5e7eb;
    --primary: #16a34a;
    --primary-dark: #15803d;
    --danger: #dc2626;
    --receita: #16a34a;
    --despesa: #dc2626;

    /* paleta categórica (dataviz skill) — ordem fixa, nunca ciclar */
    --series-1: #2a78d6; /* blue */
    --series-2: #1baf7a; /* aqua */
    --series-3: #eda100; /* yellow */
    --series-4: #008300; /* green */
    --series-5: #4a3aa7; /* violet */
    --series-6: #e34948; /* red */
    --series-7: #e87ba4; /* magenta */
    --series-8: #eb6834; /* orange */
    --series-muted: #898781;
    --chart-surface: #fcfcfb;
    --chart-grid: #e1e0d9;
}

@media (prefers-color-scheme: dark) {
    :root {
        --series-1: #3987e5;
        --series-2: #199e70;
        --series-3: #c98500;
        --series-4: #008300;
        --series-5: #9085e9;
        --series-6: #e66767;
        --series-7: #d55181;
        --series-8: #d95926;
        --series-muted: #898781;
        --chart-surface: #1a1a19;
        --chart-grid: #2c2c2a;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 1.5rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.brand { font-weight: 700; color: var(--primary-dark); text-decoration: none; font-size: 1.1rem; }

.nav-links a {
    margin-left: 1rem;
    color: var(--muted);
    text-decoration: none;
    font-size: 0.9rem;
}
.nav-links a:hover { color: var(--text); }

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 1.5rem;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.25rem;
    margin-bottom: 1.25rem;
}

.cards-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.stat { text-align: left; }
.stat .label { color: var(--muted); font-size: 0.85rem; }
.stat .value { font-size: 1.6rem; font-weight: 700; }
.stat.receita .value { color: var(--receita); }
.stat.despesa .value { color: var(--despesa); }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 0.55rem 0.5rem; border-bottom: 1px solid var(--border); font-size: 0.9rem; }
th { color: var(--muted); font-weight: 600; }

.badge { display: inline-block; padding: 0.15rem 0.5rem; border-radius: 999px; font-size: 0.75rem; }
.badge.receita { background: #dcfce7; color: var(--primary-dark); }
.badge.despesa { background: #fee2e2; color: var(--danger); }
.badge.whatsapp { background: #dbeafe; color: #1d4ed8; }
.badge.painel { background: #f3f4f6; color: var(--muted); }

form.inline { display: inline; }

.form-group { margin-bottom: 1rem; }
label { display: block; margin-bottom: 0.3rem; font-size: 0.9rem; color: var(--muted); }
input, select, button, textarea {
    font-family: inherit;
    font-size: 0.95rem;
    padding: 0.55rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    width: 100%;
}

button, .btn {
    background: var(--primary);
    color: white;
    border: none;
    cursor: pointer;
    width: auto;
    text-decoration: none;
    display: inline-block;
}
button:hover, .btn:hover { background: var(--primary-dark); }
button.danger, .btn.danger { background: var(--danger); }
button.secondary, .btn.secondary { background: #6b7280; }

.filters { display: flex; gap: 0.75rem; flex-wrap: wrap; align-items: end; margin-bottom: 1rem; }
.filters .form-group { margin-bottom: 0; min-width: 140px; }

.flash { padding: 0.7rem 1rem; border-radius: 6px; margin-bottom: 1rem; font-size: 0.9rem; }
.flash-success { background: #dcfce7; color: var(--primary-dark); }
.flash-error { background: #fee2e2; color: var(--danger); }

.auth-box { max-width: 380px; margin: 3rem auto; }
.auth-box h1 { font-size: 1.3rem; text-align: center; }
.auth-box .switch { text-align: center; font-size: 0.9rem; margin-top: 1rem; }

.actions { display: flex; gap: 0.5rem; }

.charts-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.25rem; }

.code-box { font-size: 1.5rem; font-weight: 700; letter-spacing: 0.1em; background: #f3f4f6; padding: 0.75rem 1rem; border-radius: 8px; display: inline-block; }

.pagination { display: flex; gap: 0.5rem; margin-top: 1rem; }
.pagination a { padding: 0.3rem 0.7rem; border: 1px solid var(--border); border-radius: 6px; text-decoration: none; color: var(--text); }