:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --primary: #0f766e;
  --primary-dark: #0d5f58;
  --income: #16a34a;
  --expense: #dc2626;
  --savings: #d97706;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
  --radius: 14px;
}
[data-theme="dark"] {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-2: #263449;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --border: #334155;
  --primary: #14b8a6;
  --primary-dark: #0d9488;
  --income: #4ade80;
  --expense: #f87171;
  --savings: #fbbf24;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.5;
  -webkit-font-smoothing: antialiased; min-height: 100vh;
  display: flex; flex-direction: column;
}

/* Header */
.app-header {
  background: var(--primary); color: #fff;
  padding: 12px 14px; padding-top: calc(12px + env(safe-area-inset-top));
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  position: sticky; top: 0; z-index: 20; box-shadow: var(--shadow);
}
.brand { display: flex; align-items: center; gap: 9px; }
.brand-logo { background: rgba(255,255,255,.2); width: 32px; height: 32px; border-radius: 9px; display: grid; place-items: center; font-size: 18px; font-weight: 700; }
.app-header h1 { font-size: 1.1rem; font-weight: 600; }
.header-actions { display: flex; align-items: center; gap: 6px; }
.month-filter { background: rgba(255,255,255,.15); color: #fff; border: none; padding: 8px 8px; border-radius: 9px; font-size: .88rem; cursor: pointer; max-width: 130px; }
.month-filter option { color: #1e293b; }
.icon-btn { background: rgba(255,255,255,.15); border: none; color: #fff; width: 36px; height: 36px; border-radius: 9px; cursor: pointer; font-size: 1.05rem; }
.icon-btn:hover { background: rgba(255,255,255,.28); }

/* Tabs */
.tabs {
  display: flex; gap: 4px; padding: 8px 10px; background: var(--surface);
  border-bottom: 1px solid var(--border); position: sticky; top: 56px; z-index: 15;
  overflow-x: auto; scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }
.tab {
  background: none; border: none; color: var(--text-muted);
  padding: 9px 13px; border-radius: 9px; font-size: .9rem; font-weight: 600;
  cursor: pointer; white-space: nowrap; flex-shrink: 0;
}
.tab.active { background: color-mix(in srgb, var(--primary) 14%, transparent); color: var(--primary); }

.tabpanel { display: none; flex-direction: column; gap: 14px; }
.tabpanel.active { display: flex; }

.container { width: 100%; max-width: 940px; margin: 0 auto; padding: 14px; flex: 1; }

/* Summary cards */
.summary { display: grid; gap: 10px; }
.summary-2 { grid-template-columns: repeat(2, 1fr); }
.summary-3 { grid-template-columns: repeat(3, 1fr); }
.summary-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--surface); border-radius: var(--radius); padding: 14px;
  box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 3px; border: 1px solid var(--border);
}
.card-label { font-size: .76rem; color: var(--text-muted); font-weight: 500; }
.card-value { font-size: 1.15rem; font-weight: 700; letter-spacing: -.02em; }
.card-balance .card-value { color: var(--primary); }
.card-income .card-value { color: var(--income); }
.card-expense .card-value { color: var(--expense); }
.card-savings .card-value { color: var(--savings); }
.pos { color: var(--income) !important; }
.neg { color: var(--expense) !important; }

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.panel { background: var(--surface); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); border: 1px solid var(--border); }
.panel h2 { font-size: 1rem; margin-bottom: 12px; font-weight: 600; }
.panel-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; gap: 8px; }
.panel-head h2 { margin: 0; }
.sub-h { font-size: .78rem; letter-spacing: .04em; color: var(--text-muted); font-weight: 700; margin-bottom: 8px; }
.hint-inline { font-size: .74rem; color: var(--text-muted); }

/* Mini list */
.mini-list { display: flex; flex-direction: column; gap: 8px; }
.mini-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; font-size: .9rem; padding: 7px 10px; background: var(--surface-2); border-radius: 9px; border: 1px solid var(--border); }
.mini-row .k { color: var(--text-muted); display: flex; align-items: center; gap: 7px; }
.mini-row .v { font-weight: 700; }

/* Tables */
.table-scroll { overflow-x: auto; }
.btable { width: 100%; border-collapse: collapse; font-size: .88rem; min-width: 340px; }
.btable th, .btable td { padding: 8px 8px; text-align: right; border-bottom: 1px solid var(--border); }
.btable th:first-child, .btable td:first-child { text-align: left; }
.btable thead th { color: var(--text-muted); font-weight: 600; font-size: .78rem; }
.btable tfoot td { border-top: 2px solid var(--border); }
.row-sum td { font-weight: 700; }
.row-strong td { color: var(--primary); font-size: .95rem; }
.cell-input {
  width: 100%; max-width: 120px; text-align: right; padding: 6px 8px;
  border: 1px solid var(--border); border-radius: 8px; background: var(--surface-2); color: var(--text); font-size: .86rem;
}
.cell-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 18%, transparent); }

/* Expense groups */
.exp-group { margin-bottom: 14px; }
.exp-group-head { display: flex; align-items: center; justify-content: space-between; font-weight: 600; padding: 6px 2px; font-size: .92rem; }
.exp-group-head .g-tot { color: var(--text-muted); font-weight: 700; }
.kv-list { display: flex; flex-direction: column; gap: 6px; }
.kv-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 6px 10px; background: var(--surface-2); border-radius: 9px; border: 1px solid var(--border); }
.kv-row .kv-name { font-size: .86rem; color: var(--text); flex: 1; }
.totline { display: flex; align-items: center; justify-content: space-between; padding: 12px 4px 2px; font-weight: 700; }
.totline-final { border-top: 2px solid var(--border); margin-top: 8px; padding-top: 12px; color: var(--primary); font-size: 1.05rem; }

/* Installment cards */
.card-block { border: 1px solid var(--border); border-radius: 12px; margin-bottom: 14px; overflow: hidden; }
.card-block-head { padding: 10px 12px; font-weight: 700; color: #fff; display: flex; justify-content: space-between; align-items: center; font-size: .92rem; }
.inst-row { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-bottom: 1px solid var(--border); }
.inst-row:last-child { border-bottom: none; }
.inst-info { flex: 1; min-width: 0; }
.inst-desc { font-weight: 600; font-size: .88rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.inst-meta { font-size: .74rem; color: var(--text-muted); }
.inst-right { text-align: right; }
.inst-monthly { font-weight: 700; font-size: .88rem; }
.inst-remaining { font-size: .74rem; color: var(--text-muted); }
.inst-paid { opacity: .5; }
.inst-active-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--expense); flex-shrink: 0; }
.inst-done-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--income); flex-shrink: 0; }
.mini-del { background: none; border: none; cursor: pointer; color: var(--text-muted); font-size: 1rem; padding: 4px; }
.mini-del:hover { color: var(--expense); }

/* Charts */
.chart-wrap { display: grid; place-items: center; min-height: 200px; }
.chart-bars { min-height: 220px; }
#chart, #trendChart { max-width: 100%; height: auto; }
.legend { list-style: none; margin-top: 12px; display: flex; flex-direction: column; gap: 6px; }
.legend li { display: flex; align-items: center; gap: 8px; font-size: .83rem; }
.legend .dot { width: 11px; height: 11px; border-radius: 3px; flex-shrink: 0; }
.legend .lg-name { flex: 1; color: var(--text-muted); }
.legend .lg-val { font-weight: 600; }
.chart-empty { color: var(--text-muted); font-size: .88rem; text-align: center; }

/* Transaction/gold list */
.tx-list { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.tx-item { display: flex; align-items: center; gap: 12px; padding: 11px; border-radius: 12px; background: var(--surface-2); border: 1px solid var(--border); }
.tx-icon { width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center; font-size: 1.1rem; flex-shrink: 0; background: color-mix(in srgb, var(--savings) 15%, transparent); }
.tx-info { flex: 1; min-width: 0; }
.tx-desc { font-weight: 600; font-size: .9rem; }
.tx-meta { font-size: .76rem; color: var(--text-muted); }
.tx-amount { font-weight: 700; font-size: .9rem; white-space: nowrap; }
.empty { text-align: center; color: var(--text-muted); padding: 20px 12px; font-size: .9rem; }

/* Buttons */
.btn-primary { background: var(--primary); color: #fff; border: none; padding: 11px 16px; border-radius: 10px; font-size: .95rem; font-weight: 600; cursor: pointer; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost { background: var(--surface); border: 1px solid var(--border); color: var(--text); padding: 11px 16px; border-radius: 10px; font-weight: 600; cursor: pointer; }
.btn-mini { background: color-mix(in srgb, var(--primary) 12%, transparent); color: var(--primary); border: none; padding: 7px 12px; border-radius: 8px; font-weight: 600; font-size: .82rem; cursor: pointer; }

/* Drawer */
.drawer { position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 40; display: flex; justify-content: flex-end; }
.drawer-body { background: var(--surface); width: min(320px, 85vw); height: 100%; padding: 20px; display: flex; flex-direction: column; gap: 8px; overflow-y: auto; padding-top: calc(20px + env(safe-area-inset-top)); }
.drawer-body h3 { margin-bottom: 8px; }
.drawer-item { display: block; width: 100%; text-align: left; background: var(--surface-2); border: 1px solid var(--border); color: var(--text); padding: 12px 14px; border-radius: 10px; font-size: .92rem; cursor: pointer; font-weight: 500; }
.drawer-item:hover { border-color: var(--primary); }
.drawer-item.danger { color: var(--expense); }
.drawer-item.ghost { background: none; }
.footer-note { font-size: .74rem; color: var(--text-muted); margin-top: auto; padding-top: 12px; }

/* Modal */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 50; display: grid; place-items: center; padding: 16px; }
.modal-box { background: var(--surface); border-radius: 16px; width: min(460px, 100%); max-height: 90vh; overflow-y: auto; padding: 20px; }
.modal-box h3 { margin-bottom: 14px; }
.modal-actions { display: flex; gap: 10px; margin-top: 16px; }
.modal-actions button { flex: 1; }
.field { display: flex; flex-direction: column; gap: 5px; margin-bottom: 11px; }
.field span { font-size: .8rem; color: var(--text-muted); font-weight: 500; }
.field input, .field select { padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; font-size: .95rem; background: var(--surface-2); color: var(--text); width: 100%; }
.field input:focus, .field select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 18%, transparent); }

/* Responsive */
@media (max-width: 720px) {
  .grid { grid-template-columns: 1fr; }
  .summary-4 { grid-template-columns: 1fr 1fr; }
  .card { flex-direction: row; align-items: center; justify-content: space-between; }
  .tabs { top: 54px; }
}
@media (max-width: 380px) {
  .summary-3 { grid-template-columns: 1fr; }
}