:root {
  --bg: #f4f6f5;
  --surface: #ffffff;
  --surface-2: #eef2f1;
  --text: #17201e;
  --muted: #5d6b68;
  --border: #dde4e2;
  --accent: #0f766e;
  --accent-soft: #d5efeb;
  --danger: #b42318;
  --warn: #b54708;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16, 24, 22, .06), 0 4px 16px rgba(16, 24, 22, .05);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1413;
    --surface: #161e1c;
    --surface-2: #1e2826;
    --text: #e7eeec;
    --muted: #93a39f;
    --border: #2a3634;
    --accent: #2dd4bf;
    --accent-soft: #123a36;
    --danger: #f97066;
    --warn: #fdb022;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

h2 { font-size: 1rem; margin: 0 0 12px; }
h3 { font-size: .95rem; margin: 22px 0 6px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* Top bar */
.topbar {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 20px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 1.05rem; }
.month-nav { display: flex; align-items: center; gap: 4px; }
.month-label {
  min-width: 150px; font: inherit; font-weight: 600; background: none; border: 0;
  color: var(--text); cursor: pointer; padding: 6px 8px; border-radius: 8px;
}
.month-label:hover { background: var(--surface-2); }
.top-actions { display: flex; align-items: center; gap: 6px; }

/* Layout */
.layout {
  max-width: 1100px; margin: 0 auto; padding: 20px;
  display: grid; gap: 16px;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  grid-template-areas:
    "add summary"
    "add breakdown"
    "list breakdown";
  align-items: start;
}
.add-card { grid-area: add; }
.summary-card { grid-area: summary; }
.breakdown-card { grid-area: breakdown; }
.list-card { grid-area: list; }

@media (max-width: 820px) {
  .layout {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas: "summary" "add" "breakdown" "list";
    padding: 12px 16px;
  }
  .topbar { padding: 8px 16px; }
  .brand span { display: none; }
  .month-label { min-width: 0; white-space: nowrap; padding: 6px 4px; }
  #installBtn { padding: 6px 10px; font-size: .8rem; }
}

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow);
}
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 12px; }
.card-head h2 { margin: 0; }

/* Form */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field > span { font-size: .8rem; font-weight: 600; color: var(--muted); }
.field em { font-weight: 400; font-style: normal; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row .field { flex: 0 0 auto; }
.row .grow { flex: 1 1 180px; }

input, select {
  font: inherit; color: var(--text); background: var(--surface);
  border: 1px solid var(--border); border-radius: 10px; padding: 9px 11px; min-width: 0;
}
input:focus, select:focus, button:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent;
}
.amount-wrap { position: relative; display: flex; align-items: center; }
.currency-sym { position: absolute; left: 12px; color: var(--muted); font-size: 1.3rem; pointer-events: none; }
#amount { width: 100%; font-size: 1.6rem; font-weight: 700; padding: 10px 12px 10px 38px; font-variant-numeric: tabular-nums; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  display: inline-flex; align-items: center; gap: 5px;
  border: 1px solid var(--border); background: var(--surface);
  color: var(--text); font: inherit; font-size: .85rem;
  padding: 6px 10px; border-radius: 999px; cursor: pointer;
}
.chip:hover { background: var(--surface-2); }
.chip[aria-checked="true"] {
  border-color: var(--chip-color, var(--accent));
  background: color-mix(in srgb, var(--chip-color, var(--accent)) 16%, var(--surface));
  font-weight: 600;
}

.form-actions { display: flex; justify-content: flex-end; gap: 8px; }
.import-row {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--border);
  font-size: .82rem; color: var(--muted);
}
.import-row span { flex: 1 1 200px; }
.file-btn[aria-busy="true"] { opacity: .6; pointer-events: none; }

/* Buttons */
.btn {
  font: inherit; font-size: .9rem; font-weight: 600; cursor: pointer;
  border: 1px solid var(--border); background: var(--surface-2); color: var(--text);
  padding: 9px 14px; border-radius: 10px; display: inline-flex; align-items: center; justify-content: center;
}
.btn:hover { filter: brightness(.97); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { .btn.primary { color: #06201d; } }
.btn.ghost { background: transparent; }
.btn.danger { color: var(--danger); }
.icon-btn {
  font: inherit; font-size: 1.25rem; line-height: 1; width: 36px; height: 36px;
  border: 0; border-radius: 10px; background: transparent; color: var(--text); cursor: pointer;
}
.icon-btn:hover { background: var(--surface-2); }
.link-btn { font: inherit; font-size: .85rem; border: 0; background: none; color: var(--accent); cursor: pointer; padding: 4px; }

/* Summary */
.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.stat { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.stat-label { font-size: .78rem; color: var(--muted); font-weight: 600; }
.stat-value { font-size: 1.35rem; font-weight: 700; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.stat-value.up { color: var(--danger); }
.stat-value.down { color: var(--accent); }
.stat-value.over { color: var(--danger); }
.overall-bar { margin-top: 14px; }

.bar { height: 8px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.bar-fill { height: 100%; border-radius: 99px; background: var(--accent); transition: width .3s; }
.bar-fill.warn { background: var(--warn); }
.bar-fill.over { background: var(--danger); }

/* Breakdown */
.donut-wrap { position: relative; width: 170px; margin: 0 auto 14px; }
#donut { width: 100%; display: block; }
.donut-center {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; font-weight: 700; font-variant-numeric: tabular-nums;
}
.donut-center small { font-weight: 500; color: var(--muted); font-size: .75rem; }

.cat-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.cat-row { display: grid; grid-template-columns: auto 1fr auto; gap: 4px 10px; align-items: center; }
.cat-dot { width: 10px; height: 10px; border-radius: 50%; }
.cat-name { font-weight: 600; font-size: .9rem; }
.cat-amt { font-variant-numeric: tabular-nums; font-weight: 600; font-size: .9rem; text-align: right; }
.cat-sub { grid-column: 2 / 4; font-size: .78rem; color: var(--muted); display: flex; justify-content: space-between; gap: 8px; }
.cat-sub .over { color: var(--danger); font-weight: 600; }
.cat-row .bar { grid-column: 2 / 4; height: 6px; }

/* List */
.day-group { margin-bottom: 14px; }
.day-head {
  display: flex; justify-content: space-between; font-size: .78rem; font-weight: 600;
  color: var(--muted); padding: 4px 2px; border-bottom: 1px solid var(--border); margin-bottom: 4px;
}
.expense {
  display: grid; grid-template-columns: auto 1fr auto auto; align-items: center; gap: 10px;
  padding: 8px 2px; border-radius: 8px;
}
.expense:hover { background: var(--surface-2); }
.exp-icon {
  width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; font-size: 1.05rem;
  background: color-mix(in srgb, var(--c) 18%, var(--surface));
}
.exp-main { min-width: 0; }
.exp-title { font-weight: 600; font-size: .9rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.exp-cat { font-size: .78rem; color: var(--muted); }
.exp-amt { font-weight: 700; font-variant-numeric: tabular-nums; }
.exp-actions { display: flex; gap: 0; opacity: .55; }
.expense:hover .exp-actions, .exp-actions:focus-within { opacity: 1; }
.exp-actions .icon-btn { width: 30px; height: 30px; font-size: .95rem; }

.empty { text-align: center; color: var(--muted); padding: 24px 8px; font-size: .9rem; }

/* Dialog */
dialog {
  border: 1px solid var(--border); border-radius: var(--radius); padding: 0;
  background: var(--surface); color: var(--text);
  width: min(560px, calc(100vw - 32px)); max-height: calc(100vh - 48px);
}
dialog::backdrop { background: rgba(0, 0, 0, .4); }
.dialog-inner { padding: 18px 20px 22px; }
.dialog-head { display: flex; justify-content: space-between; align-items: center; }
.dialog-head h2 { margin: 0; font-size: 1.1rem; }
.hint { font-size: .82rem; color: var(--muted); margin: 0 0 10px; }

.cat-edit { display: grid; grid-template-columns: 52px 1fr 110px 36px; gap: 6px; margin-bottom: 6px; align-items: center; }
.cat-edit input { padding: 7px 9px; }
.cat-edit .emoji-in { text-align: center; }
.add-cat { display: grid; grid-template-columns: 52px 1fr auto; gap: 6px; margin-top: 8px; }
.add-cat input:first-child { text-align: center; }
.data-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.file-btn { cursor: pointer; }

@media (max-width: 480px) {
  .brand { display: none; }
  .topbar { gap: 6px; }
  .cat-edit { grid-template-columns: 44px 1fr 84px 32px; }
  .stat-value { font-size: 1.1rem; }
}

/* Toast */
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px);
  background: var(--text); color: var(--bg); padding: 10px 14px; border-radius: 10px;
  font-size: .9rem; opacity: 0; pointer-events: none; transition: .2s; display: flex; gap: 12px; align-items: center;
  max-width: calc(100vw - 32px);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); pointer-events: auto; }
.toast button { font: inherit; font-weight: 700; background: none; border: 0; color: inherit; text-decoration: underline; cursor: pointer; }