:root {
  --bg: #f4f5f7;
  --card-bg: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --danger: #dc2626;
  --income: #16a34a;
  --expense: #dc2626;
}

* { box-sizing: border-box; }

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  flex-wrap: wrap;
}

.nav-brand { font-weight: 700; }
.nav-links { display: flex; gap: 16px; flex: 1; flex-wrap: wrap; }
.nav-links a { color: var(--text); text-decoration: none; }
.nav-links a:hover { color: var(--primary); }
.nav-logout { display: flex; align-items: center; gap: 12px; margin: 0; }
.nav-email { color: var(--muted); font-size: 0.9em; }

.lang-switcher { display: flex; gap: 8px; }
.lang-switcher a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.85em;
  padding: 2px 6px;
  border-radius: 4px;
}
.lang-switcher a.lang-active { background: var(--primary); color: #fff; }
.lang-switcher-public { justify-content: flex-end; padding: 12px 24px 0; }

h1 { margin-top: 0; }

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
}

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }

.stat-label { color: var(--muted); font-size: 0.9em; }
.stat-value { font-size: 1.8em; font-weight: 700; margin-top: 4px; }
.stat-income { color: var(--income); }
.stat-expense { color: var(--expense); }

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.btn {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
  font-size: 0.95em;
}

.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-ghost { background: transparent; border: none; color: var(--muted); }
.btn-link-danger { background: none; border: none; color: var(--danger); cursor: pointer; padding: 0; text-decoration: underline; font-size: 0.9em; }
.btn-link { background: none; border: none; color: var(--primary); cursor: pointer; padding: 0; text-decoration: underline; font-size: 0.9em; }

.form { display: flex; flex-direction: column; gap: 14px; max-width: 480px; }
.form label { display: flex; flex-direction: column; gap: 6px; font-size: 0.9em; color: var(--muted); }
.form input, .form select {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1em;
  color: var(--text);
}
.checkbox-label { flex-direction: row !important; align-items: center; gap: 8px !important; }

.auth-card {
  max-width: 360px;
  margin: 60px auto;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
}
.auth-card form { display: flex; flex-direction: column; gap: 12px; }
.auth-card label { display: flex; flex-direction: column; gap: 6px; font-size: 0.9em; color: var(--muted); }
.auth-card input { padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; }

.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 8px; border-bottom: 1px solid var(--border); font-size: 0.95em; }
.row-actions { display: flex; gap: 10px; align-items: center; white-space: nowrap; }
.row-actions form { margin: 0; }

.badge { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 6px; }

.breakdown-list { list-style: none; margin: 0; padding: 0; }
.breakdown-list li { display: flex; align-items: center; padding: 6px 0; border-bottom: 1px solid var(--border); }
.breakdown-name { flex: 1; }
.breakdown-amount { font-weight: 600; }

.category-list { list-style: none; margin: 0; padding: 0; }
.category-list li { display: flex; align-items: center; gap: 8px; padding: 8px 0; border-bottom: 1px solid var(--border); }
.category-list li > span:nth-child(2) { flex: 1; }

.budget-item { margin-bottom: 16px; }
.budget-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; gap: 12px; }
.progress-bar { background: #e5e7eb; border-radius: 6px; height: 10px; overflow: hidden; }
.progress-bar-fill { height: 100%; background: var(--primary); }
.progress-bar-fill.over { background: var(--danger); }

.filter-bar { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
.filter-bar input, .filter-bar select { padding: 8px; border: 1px solid var(--border); border-radius: 6px; }

.error-list { color: var(--danger); padding-left: 20px; }
.flash { padding: 10px 14px; border-radius: 6px; margin-bottom: 16px; }
.flash-error { background: #fee2e2; color: var(--danger); }
.flash-success { background: #dcfce7; color: var(--income); }
.flash-info { background: #dbeafe; color: var(--primary); }
.muted { color: var(--muted); }

@media (max-width: 640px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .nav { flex-direction: column; align-items: flex-start; gap: 8px; }
  .page-header { flex-direction: column; align-items: flex-start; gap: 10px; }
}