:root {
  --bg: #f3f4f8;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #0f766e;
  --primary-dark: #115e59;
  --danger: #b91c1c;
  --border: #e5e7eb;
  --shadow: 0 8px 20px rgba(15, 23, 42, 0.06);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #eef2f7 0%, #f9fafb 100%);
}

.app {
  max-width: 1080px;
  margin: 2rem auto;
  padding: 0 1rem 2rem;
}

.app-header {
  margin-bottom: 1rem;
}

.app-header h1 {
  margin: 0;
  font-size: 1.8rem;
}

.app-header p {
  margin: 0.4rem 0 0;
  color: var(--muted);
}

.sync-status {
  font-size: 0.84rem;
}

.sync-status.error {
  color: var(--danger);
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 1rem;
  margin-bottom: 1rem;
}

.card h2 {
  margin: 0 0 0.8rem;
  font-size: 1.08rem;
}

.controls-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.member-grid,
.month-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.8rem;
}

.form {
  display: grid;
  gap: 0.75rem;
}

.recurring-form {
  margin-bottom: 0.8rem;
}

label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.92rem;
}

input,
select,
button {
  font: inherit;
}

input,
select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.6rem 0.65rem;
  background: #fff;
}

input:focus,
select:focus {
  outline: 2px solid rgba(15, 118, 110, 0.18);
  border-color: var(--primary);
}

.btn {
  border: none;
  border-radius: 10px;
  padding: 0.58rem 0.9rem;
  cursor: pointer;
}

.btn.primary {
  background: var(--primary);
  color: #fff;
}

.btn.primary:hover {
  background: var(--primary-dark);
}

.btn.secondary {
  width: fit-content;
  background: #e2e8f0;
  color: #1f2937;
}

.btn.danger {
  background: #fee2e2;
  color: var(--danger);
}

.summary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.7rem;
}

.metric {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.7rem;
  display: grid;
  gap: 0.2rem;
}

.metric span {
  color: var(--muted);
  font-size: 0.85rem;
}

.metric strong {
  font-size: 1.05rem;
}

.category-chart {
  display: grid;
  gap: 0.55rem;
}

.chart-row {
  display: grid;
  grid-template-columns: 110px 1fr auto;
  align-items: center;
  gap: 0.65rem;
}

.chart-label {
  font-size: 0.88rem;
  color: var(--muted);
}

.chart-bar-track {
  width: 100%;
  height: 10px;
  border-radius: 99px;
  background: #e5e7eb;
  overflow: hidden;
}

.chart-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #0f766e, #14b8a6);
}

.chart-value {
  font-size: 0.86rem;
  white-space: nowrap;
}

.list-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 540px;
}

th,
td {
  border-bottom: 1px solid var(--border);
  text-align: left;
  padding: 0.6rem 0.4rem;
  font-size: 0.89rem;
}

th {
  color: var(--muted);
  font-weight: 600;
}

.delete-btn {
  border: 1px solid #fecaca;
  background: #fff1f2;
  color: var(--danger);
  border-radius: 8px;
  padding: 0.34rem 0.52rem;
  cursor: pointer;
}

.empty {
  text-align: center;
  color: var(--muted);
  padding: 1rem;
}

@media (max-width: 900px) {
  .controls-card,
  .grid,
  .member-grid,
  .month-row,
  .summary-grid {
    grid-template-columns: 1fr;
  }

  .chart-row {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .app {
    margin-top: 1.2rem;
  }

  .button-row .btn {
    width: 100%;
  }
}

@media (max-width: 560px) {
  .card {
    padding: 0.85rem;
  }

  th,
  td {
    font-size: 0.8rem;
    padding: 0.5rem 0.35rem;
  }

  table {
    min-width: 480px;
  }
}