:root {
  --bg: #f4f6f9;
  --bg-card: #ffffff;
  --bg-elevated: #ffffff;
  --text: #1c2833;
  --text-muted: #6b7785;
  --border: #e1e6ec;
  --primary: #1b4f72;
  --primary-hover: #15405d;
  --primary-text: #ffffff;
  --accent: #2e86c1;
  --success: #1e8449;
  --success-bg: #d5f5e3;
  --danger: #c0392b;
  --danger-bg: #fdedec;
  --warning: #b9770e;
  --warning-bg: #fef9e7;
  --info-bg: #d6eaf8;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-lg: 0 4px 16px rgba(0,0,0,.12);
  --radius: 10px;
}

[data-theme="dark"] {
  --bg: #0f1620;
  --bg-card: #1a2433;
  --bg-elevated: #212f42;
  --text: #e8edf2;
  --text-muted: #8b9aab;
  --border: #2c3a4d;
  --primary: #2e86c1;
  --primary-hover: #3a97d4;
  --primary-text: #ffffff;
  --accent: #5dade2;
  --success: #2ecc71;
  --success-bg: #173d28;
  --danger: #e74c3c;
  --danger-bg: #3d1a17;
  --warning: #f39c12;
  --warning-bg: #3d2f12;
  --info-bg: #16304a;
  --shadow: 0 1px 3px rgba(0,0,0,.3);
  --shadow-lg: 0 4px 16px rgba(0,0,0,.5);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  transition: background .2s, color .2s;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Layout ── */
.app { display: flex; min-height: 100vh; }
.sidebar {
  width: 230px; background: var(--primary); color: var(--primary-text);
  display: flex; flex-direction: column; position: fixed; height: 100vh;
  overflow-y: auto; z-index: 100;
}
.sidebar-brand {
  padding: 18px 20px; font-size: 1.2rem; font-weight: 700;
  border-bottom: 1px solid rgba(255,255,255,.15); letter-spacing: .5px;
}
.sidebar-brand small { display:block; font-size:.7rem; font-weight:400; opacity:.7; }
.sidebar-nav { padding: 10px 0; flex: 1; }
.sidebar-nav a {
  display: flex; align-items: center; gap: 10px; padding: 11px 20px;
  color: rgba(255,255,255,.85); font-size: .92rem; border-left: 3px solid transparent;
}
.sidebar-nav a:hover { background: rgba(255,255,255,.08); color: #fff; text-decoration: none; }
.sidebar-nav a.active { background: rgba(255,255,255,.14); border-left-color: #fff; color: #fff; }
.sidebar-nav .nav-section { padding: 14px 20px 6px; font-size: .68rem; text-transform: uppercase;
  letter-spacing: 1px; opacity: .5; }

.main { flex: 1; margin-left: 230px; display: flex; flex-direction: column; }
.topbar {
  background: var(--bg-card); border-bottom: 1px solid var(--border);
  padding: 12px 24px; display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 50; box-shadow: var(--shadow);
}
.topbar-title { font-size: 1.05rem; font-weight: 600; }
.topbar-actions { display: flex; align-items: center; gap: 14px; }
.content { padding: 24px; flex: 1; }

/* ── Theme toggle ── */
.theme-toggle {
  background: none; border: 1px solid var(--border); border-radius: 20px;
  padding: 6px 12px; cursor: pointer; color: var(--text); font-size: .85rem;
  display: flex; align-items: center; gap: 6px;
}
.theme-toggle:hover { background: var(--bg-elevated); }

/* ── Cards ── */
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow); margin-bottom: 20px;
}
.card-header { padding: 14px 18px; border-bottom: 1px solid var(--border); font-weight: 600;
  display:flex; justify-content:space-between; align-items:center; }
.card-body { padding: 18px; }

/* ── Stat cards (monitor) ── */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; }
.stat-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; box-shadow: var(--shadow); border-top: 3px solid var(--accent);
}
.stat-card.dinheiro { border-top-color: #1e8449; }
.stat-card.credito  { border-top-color: #2e86c1; }
.stat-card.debito   { border-top-color: #8e44ad; }
.stat-card.pix      { border-top-color: #16a085; }
.stat-card.fiado    { border-top-color: #d35400; }
.stat-card.total    { border-top-color: var(--primary); background: var(--info-bg); }
.stat-label { font-size: .78rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .5px; }
.stat-value { font-size: 1.6rem; font-weight: 700; margin-top: 4px; }
.stat-sub { font-size: .78rem; color: var(--text-muted); margin-top: 2px; }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 9px 16px;
  border: none; border-radius: 8px; font-size: .9rem; font-weight: 500;
  cursor: pointer; background: var(--bg-elevated); color: var(--text);
  border: 1px solid var(--border); transition: all .15s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-primary { background: var(--primary); color: var(--primary-text); border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-hover); }
.btn-success { background: var(--success); color: #fff; border-color: var(--success); }
.btn-danger  { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-sm { padding: 5px 10px; font-size: .8rem; }
.btn-lg { padding: 13px 22px; font-size: 1.05rem; }
.btn-block { width: 100%; justify-content: center; }

/* ── Forms ── */
.form-group { margin-bottom: 14px; }
.form-label { display: block; font-size: .85rem; font-weight: 500; margin-bottom: 5px; color: var(--text-muted); }
.form-control, .form-select {
  width: 100%; padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg-elevated); color: var(--text); font-size: .92rem;
}
.form-control:focus, .form-select:focus { outline: none; border-color: var(--accent); }
.form-row { display: flex; gap: 14px; flex-wrap: wrap; }
.form-row > .form-group { flex: 1; min-width: 160px; }

/* ── Tables ── */
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
.table th { font-size: .78rem; text-transform: uppercase; letter-spacing: .5px; color: var(--text-muted); }
.table tbody tr:hover { background: var(--bg-elevated); }
.table .text-right { text-align: right; }
.table .text-center { text-align: center; }

/* ── Badges ── */
.badge { display: inline-block; padding: 3px 9px; border-radius: 12px; font-size: .76rem; font-weight: 600; }
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-danger  { background: var(--danger-bg); color: var(--danger); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-info    { background: var(--info-bg); color: var(--accent); }
.badge-muted   { background: var(--bg-elevated); color: var(--text-muted); }

/* ── Alerts ── */
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 14px; font-size: .9rem; }
.alert-success { background: var(--success-bg); color: var(--success); }
.alert-danger  { background: var(--danger-bg); color: var(--danger); }
.alert-warning { background: var(--warning-bg); color: var(--warning); }
.alert-info    { background: var(--info-bg); color: var(--accent); }

/* ── Utilities ── */
.flex { display: flex; } .flex-between { display:flex; justify-content:space-between; align-items:center; }
.gap-2 { gap: 8px; } .gap-3 { gap: 14px; }
.mb-0 { margin-bottom: 0; } .mb-2 { margin-bottom: 10px; } .mb-3 { margin-bottom: 18px; }
.mt-2 { margin-top: 10px; } .mt-3 { margin-top: 18px; }
.text-muted { color: var(--text-muted); } .text-right { text-align: right; }
.text-success { color: var(--success); } .text-danger { color: var(--danger); }
.fw-bold { font-weight: 700; } .fs-sm { font-size: .85rem; } .fs-lg { font-size: 1.2rem; }
.page-title { font-size: 1.4rem; font-weight: 700; margin-bottom: 18px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.empty { text-align: center; padding: 40px; color: var(--text-muted); }

/* ── Auth / centered ── */
.auth-wrap { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 20px; }
.auth-card { background: var(--bg-card); border-radius: 14px; box-shadow: var(--shadow-lg);
  padding: 36px; width: 100%; max-width: 400px; border: 1px solid var(--border); }
.auth-brand { text-align: center; font-size: 1.5rem; font-weight: 700; color: var(--primary); margin-bottom: 6px; }
.auth-sub { text-align: center; color: var(--text-muted); margin-bottom: 24px; font-size: .9rem; }

/* ── Mobile ── */
@media (max-width: 820px) {
  .sidebar { transform: translateX(-100%); transition: transform .25s; }
  .sidebar.open { transform: translateX(0); }
  .main { margin-left: 0; }
  .menu-toggle { display: inline-flex !important; }
  .grid-2 { grid-template-columns: 1fr; }
}
.menu-toggle { display: none; background: none; border: none; font-size: 1.4rem; cursor: pointer; color: var(--text); }

/* Utilitários adicionais */
.center { text-align: center; }
.linha-nova { background: var(--warning-bg); }
.flex-between { display: flex; justify-content: space-between; align-items: center; }