/* ==========================================================================
   Finance Dashboard — Styles
   ========================================================================== */

:root {
  --bg: #f4f6fb;
  --surface: #ffffff;
  --surface-alt: #f9fafc;
  --border: #e3e7ef;
  --text: #1f2433;
  --text-muted: #6b7280;
  --text-faint: #9aa1b1;

  --primary: #5b5bf0;
  --primary-dark: #4645d0;
  --primary-light: #eceafe;

  --income: #17a673;
  --income-bg: #e7f8f0;
  --expense: #e5484d;
  --expense-bg: #fdeceb;
  --balance-pos: #17a673;
  --balance-neg: #e5484d;

  --shadow-sm: 0 1px 2px rgba(20, 24, 40, 0.06);
  --shadow-md: 0 4px 16px rgba(20, 24, 40, 0.08);
  --radius: 14px;
  --radius-sm: 8px;

  font-size: 16px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.app {
  max-width: 1280px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------- Topbar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
}
.brand-icon { font-size: 1.6rem; }

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.month-picker {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
}
.month-picker input[type="month"] {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font-size: 0.9rem;
  background: var(--surface-alt);
  color: var(--text);
}

/* ---------- Buttons ---------- */
.btn {
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.05s ease, background 0.15s ease, box-shadow 0.15s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--primary-dark); }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--surface-alt); color: var(--text); }

.btn-danger-outline {
  background: transparent;
  border: 1px solid var(--expense);
  color: var(--expense);
}
.btn-danger-outline:hover { background: var(--expense-bg); }

.btn-icon-sm {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 9px;
  font-size: 0.8rem;
  cursor: pointer;
  color: var(--text-muted);
}
.btn-icon-sm:hover { background: var(--surface-alt); }
.btn-icon-sm.danger { color: var(--expense); border-color: #f7c9cb; }
.btn-icon-sm.danger:hover { background: var(--expense-bg); }

/* ---------- Content Layout ---------- */
.content {
  flex: 1;
  padding: 22px 24px 12px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

/* ---------- Cards ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 20px;
}

.card-title {
  margin: 0 0 14px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
}

/* ---------- Summary Cards ---------- */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.summary-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 20px;
}

.card-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.card-value {
  font-size: 1.7rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.card-sub {
  font-size: 0.78rem;
  color: var(--text-faint);
}

.income-card .card-value { color: var(--income); }
.expense-card .card-value { color: var(--expense); }
.balance-card .card-value.positive { color: var(--balance-pos); }
.balance-card .card-value.negative { color: var(--balance-neg); }
.count-card .card-value { color: var(--primary); }

/* ---------- Main Grid (form + charts) ---------- */
.main-grid {
  display: grid;
  grid-template-columns: 340px 1fr 1fr;
  gap: 18px;
  align-items: start;
}

.chart-card.wide {
  grid-column: span 2;
}

.chart-wrap {
  position: relative;
  height: 260px;
}

/* ---------- Form ---------- */
.form-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.form-row label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-row input,
.form-row select {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 0.95rem;
  background: var(--surface-alt);
  color: var(--text);
  width: 100%;
}

.form-row input:focus,
.form-row select:focus {
  outline: none;
  border-color: var(--primary);
  background: #fff;
}

.type-toggle {
  flex-direction: row;
  gap: 10px;
}

.radio-pill {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text-muted);
  background: var(--surface-alt);
  transition: all 0.15s ease;
  position: relative;
}
.radio-pill input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.radio-pill:has(input:checked) {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary-dark);
}
/* Fallback for browsers without :has() support */
.radio-pill.active {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary-dark);
}

.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 6px;
}
.form-actions .btn { flex: 1; }

/* ---------- History Section ---------- */
.history-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.history-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.history-controls input,
.history-controls select {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font-size: 0.85rem;
  background: var(--surface-alt);
  color: var(--text);
}

.history-controls input[type="search"] {
  min-width: 200px;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

thead th {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 2px solid var(--border);
  color: var(--text-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

th.sortable { cursor: pointer; user-select: none; }
th.sortable:hover { color: var(--text); }
.sort-arrow { font-size: 0.7rem; }

tbody td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

tbody tr:hover { background: var(--surface-alt); }

.type-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: capitalize;
}
.type-badge.income { background: var(--income-bg); color: var(--income); }
.type-badge.expense { background: var(--expense-bg); color: var(--expense); }

.amount-cell.income { color: var(--income); font-weight: 700; }
.amount-cell.expense { color: var(--expense); font-weight: 700; }

.actions-col, .actions-cell {
  white-space: nowrap;
  text-align: right;
}
.actions-cell .btn-icon-sm { margin-left: 6px; }

.desc-cell {
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---------- Breakdown ---------- */
.breakdown-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 10px;
}

.breakdown-item {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.breakdown-item .b-cat {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted);
}
.breakdown-item .b-amt {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--expense);
}

/* ---------- Empty States ---------- */
.empty-state {
  text-align: center;
  padding: 24px 12px;
  color: var(--text-faint);
  font-size: 0.9rem;
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #1f2433;
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 100;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast.error { background: var(--expense); }
.toast.success { background: var(--income); }

/* ---------- Footer ---------- */
.app-footer {
  text-align: center;
  padding: 16px;
  color: var(--text-faint);
  font-size: 0.78rem;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1100px) {
  .main-grid {
    grid-template-columns: 1fr 1fr;
  }
  .form-card { grid-column: span 2; }
  .chart-card.wide { grid-column: span 2; }
}

@media (max-width: 860px) {
  .summary-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .main-grid {
    grid-template-columns: 1fr;
  }
  .form-card, .chart-card.wide, .chart-card {
    grid-column: span 1;
  }
}

@media (max-width: 600px) {
  html, body { font-size: 15px; }

  .topbar {
    padding: 14px 16px;
    flex-direction: column;
    align-items: stretch;
  }
  .topbar-actions {
    justify-content: space-between;
  }

  .content {
    padding: 16px 14px 8px;
  }

  .summary-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }
  .summary-card { padding: 14px; }
  .card-value { font-size: 1.35rem; }

  .history-controls {
    width: 100%;
  }
  .history-controls input[type="search"] {
    flex: 1 1 100%;
  }

  .chart-wrap { height: 220px; }

  .desc-cell { max-width: 120px; }
}

@media (max-width: 420px) {
  .summary-grid {
    grid-template-columns: 1fr;
  }
}