/* =====================================================
   GLOBAL RESET
===================================================== */
* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, sans-serif; background: #f4f6fb; color: #111827; }
a { color: inherit; text-decoration: none; }

/* =====================================================
   NAVIGATION
===================================================== */
.navbar { height: 70px; background: #111827; color: #fff; display: flex; align-items: center; justify-content: space-between; padding: 0 32px; }
.brand a { font-size: 20px; font-weight: 800; }
.nav-links { display: flex; align-items: center; gap: 16px; }
.nav-links form { margin: 0; }

/* =====================================================
   LAYOUT
===================================================== */
.container { max-width: 1180px; margin: 0 auto; padding: 32px 20px; }
.narrow { max-width: 720px; }
.page-head { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.page-head h1 { margin: 0 0 6px; font-size: 32px; }
.page-head p { margin: 0; color: #6b7280; }

/* =====================================================
   CARDS
===================================================== */
.card, .filter-card, .auth-card, .kpi-card { background: #fff; border: 1px solid #e5e7eb; border-radius: 18px; box-shadow: 0 10px 25px rgba(17, 24, 39, 0.06); }
.card { padding: 24px; overflow-x: auto; }
.card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.card-head h2 { margin: 0; }
.kpi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-bottom: 24px; }
.kpi-card { padding: 24px; }
.kpi-card span { display: block; color: #6b7280; margin-bottom: 8px; }
.kpi-card strong { font-size: 28px; }

/* =====================================================
   AUTH
===================================================== */
.auth-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; background: linear-gradient(135deg, #111827, #1f2937); }
.auth-card { width: 100%; max-width: 430px; padding: 32px; }
.auth-card h1 { margin: 0 0 8px; }
.auth-card p { color: #6b7280; }
.muted { text-align: center; }
.muted a { color: #f97316; font-weight: 700; }

/* =====================================================
   FORMS
===================================================== */
.form { display: flex; flex-direction: column; gap: 12px; }
.form label { font-weight: 700; font-size: 14px; }
input, select, textarea { width: 100%; padding: 13px 14px; border: 1px solid #d1d5db; border-radius: 12px; font-size: 15px; outline: none; }
input:focus, select:focus, textarea:focus { border-color: #f97316; }
.grid-form { gap: 14px; }
.filter-card { padding: 18px; margin-bottom: 20px; display: grid; grid-template-columns: 1.2fr 1fr 1fr auto; gap: 12px; }

/* =====================================================
   BUTTONS
===================================================== */
.btn { border: 0; border-radius: 12px; padding: 11px 16px; font-weight: 700; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; background: #e5e7eb; }
.btn-primary { background: #f97316; color: #fff; }
.btn-dark { background: #374151; color: #fff; }
.btn.full { width: 100%; margin-top: 8px; }
.btn.small { padding: 8px 11px; font-size: 13px; }
.btn.danger { background: #fee2e2; color: #991b1b; }

/* =====================================================
   TABLES
===================================================== */
table { width: 100%; border-collapse: collapse; min-width: 760px; }
th, td { text-align: left; padding: 14px 12px; border-bottom: 1px solid #e5e7eb; }
th { color: #6b7280; font-size: 13px; text-transform: uppercase; }
.actions { display: flex; gap: 8px; }
.actions form { margin: 0; }
.empty { text-align: center; color: #6b7280; padding: 28px; }
.badge { padding: 6px 10px; border-radius: 999px; font-size: 12px; font-weight: 800; text-transform: uppercase; }
.badge.income { background: #dcfce7; color: #166534; }
.badge.expense { background: #fee2e2; color: #991b1b; }

/* =====================================================
   ALERTS
===================================================== */
.alert { padding: 13px 16px; border-radius: 12px; margin-bottom: 16px; font-weight: 700; }
.alert.success { background: #dcfce7; color: #166534; }
.alert.error { background: #fee2e2; color: #991b1b; }

/* =====================================================
   RESPONSIVE
===================================================== */
@media (max-width: 760px) {
  .navbar { height: auto; padding: 18px; flex-direction: column; gap: 12px; align-items: flex-start; }
  .nav-links { flex-wrap: wrap; }
  .page-head { flex-direction: column; align-items: flex-start; }
  .kpi-grid { grid-template-columns: 1fr; }
  .filter-card { grid-template-columns: 1fr; }
}