:root {
  --bg: #0f1419;
  --panel: #1a2029;
  --panel-2: #232c38;
  --text: #e6edf3;
  --muted: #8b97a7;
  --accent: #3fb950;
  --accent-2: #4a9eff;
  --red: #f85149;
  --border: #2d3744;
  --radius: 14px;
  font-size: 16px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  -webkit-tap-highlight-color: transparent;
}
.hidden { display: none !important; }
.muted { color: var(--muted); }
.empty { text-align: center; padding: 24px 12px; }

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  padding: 14px 20px;
  padding-top: calc(14px + env(safe-area-inset-top));
  padding-left: calc(20px + env(safe-area-inset-left));
  padding-right: calc(20px + env(safe-area-inset-right));
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}
header h1 { font-size: 1.15rem; margin: 0; }
nav { display: flex; gap: 6px; }
.nav-btn {
  background: transparent; color: var(--muted);
  border: 1px solid transparent; border-radius: 9px;
  padding: 7px 14px; cursor: pointer; font-size: 0.92rem;
}
.nav-btn:hover { color: var(--text); background: var(--panel); }
.nav-btn.active { color: var(--accent); background: var(--panel); border-color: var(--border); }

main {
  flex: 1; width: 100%; max-width: 640px; margin: 0 auto;
  padding: 18px 16px 90px;
}

.month-bar {
  display: flex; align-items: center; justify-content: center; gap: 18px;
  margin-bottom: 18px;
}
.month-nav {
  background: var(--panel); color: var(--text); border: 1px solid var(--border);
  border-radius: 10px; width: 40px; height: 40px; font-size: 1.3rem; cursor: pointer;
}
.month-nav:hover { border-color: var(--accent-2); }
#month-label { font-size: 1.05rem; font-weight: 600; min-width: 160px; text-align: center; }

/* summary cards */
.summary { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 8px; }
.sum-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 12px; text-align: center; }
.sum-lbl { color: var(--muted); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.5px; }
.sum-val { font-size: 1.3rem; font-weight: 700; margin-top: 4px; }
.sum-expense .sum-val { color: var(--red); }
.sum-income .sum-val { color: var(--accent); }
.sum-net .sum-val { color: var(--text); }
.sum-net .sum-val.neg { color: var(--red); }

.section-title { font-size: 0.95rem; color: var(--muted); margin: 24px 0 10px; font-weight: 600; }

/* breakdown */
.bd-row { display: flex; align-items: center; gap: 12px; padding: 9px 0; }
.bd-icon { width: 38px; height: 38px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; flex-shrink: 0; }
.bd-main { flex: 1; min-width: 0; }
.bd-top { display: flex; justify-content: space-between; font-size: 0.92rem; margin-bottom: 5px; }
.bd-bar { height: 7px; background: var(--panel-2); border-radius: 6px; overflow: hidden; }
.bd-fill { height: 100%; border-radius: 6px; }
.bd-pct { color: var(--muted); font-size: 0.8rem; width: 36px; text-align: right; }

/* budget progress */
.bp-row { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; margin-bottom: 10px; }
.bp-top { display: flex; justify-content: space-between; font-size: 0.92rem; margin-bottom: 8px; }
.bp-top .over { color: var(--red); font-weight: 600; }
.bp-bar { height: 9px; background: var(--panel-2); border-radius: 6px; overflow: hidden; }
.bp-fill { height: 100%; border-radius: 6px; }
.bp-fill.over { background: var(--red); }
.bp-warn { color: var(--red); font-size: 0.78rem; margin-top: 6px; }
.bp-left { color: var(--muted); font-size: 0.78rem; margin-top: 6px; }

/* transaction list */
.txn-row { display: flex; align-items: center; gap: 12px; padding: 11px 0; border-bottom: 1px solid var(--border); cursor: pointer; }
.txn-row:hover { background: var(--panel); }
.txn-icon { width: 40px; height: 40px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; flex-shrink: 0; }
.txn-mid { flex: 1; min-width: 0; }
.txn-note { font-weight: 600; font-size: 0.95rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.txn-sub { color: var(--muted); font-size: 0.78rem; margin-top: 2px; }
.recur-tag { color: var(--accent-2); }
.txn-amt { font-weight: 700; font-size: 0.98rem; white-space: nowrap; }
.txn-amt.expense { color: var(--text); }
.txn-amt.income { color: var(--accent); }
.txn-del { opacity: 0.5; }
.txn-del:hover { opacity: 1; }

/* budgets editor */
.budget-hint { margin: 0 0 16px; font-size: 0.85rem; }
.be-row { display: flex; align-items: center; justify-content: space-between; padding: 11px 0; border-bottom: 1px solid var(--border); }
.be-cat { display: flex; align-items: center; gap: 10px; font-size: 0.95rem; }
.be-icon { font-size: 1.2rem; }
.be-input { display: flex; align-items: center; gap: 6px; background: var(--panel); border: 1px solid var(--border); border-radius: 9px; padding: 6px 10px; }
.be-input span { color: var(--muted); }
.be-input input { width: 80px; background: transparent; border: none; color: var(--text); font-size: 1rem; text-align: right; outline: none; }

/* FAB */
#fab {
  position: fixed;
  right: calc(20px + env(safe-area-inset-right));
  bottom: calc(24px + env(safe-area-inset-bottom));
  width: 60px; height: 60px; border-radius: 50%;
  background: var(--accent); color: #07210d; border: none;
  font-size: 2rem; font-weight: 400; cursor: pointer;
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
  z-index: 20; line-height: 1;
}
#fab:hover { filter: brightness(1.08); }

/* modal */
.modal {
  position: fixed; inset: 0; background: rgba(0,0,0,0.6);
  display: flex; align-items: flex-end; justify-content: center;
  z-index: 30;
}
.modal-card {
  background: var(--panel); width: 100%; max-width: 480px;
  border-radius: 18px 18px 0 0; padding: 20px;
  padding-bottom: calc(20px + env(safe-area-inset-bottom));
  max-height: 92vh; overflow-y: auto;
  border: 1px solid var(--border);
}
@media (min-width: 520px) { .modal { align-items: center; } .modal-card { border-radius: 18px; } }
.modal-head { display: flex; justify-content: space-between; align-items: center; font-size: 1.1rem; font-weight: 600; margin-bottom: 16px; }
.icon-btn { background: transparent; border: none; color: var(--muted); cursor: pointer; font-size: 1.1rem; padding: 4px; }
.icon-btn:hover { color: var(--text); }

.type-toggle { display: flex; gap: 6px; background: var(--panel-2); border-radius: 10px; padding: 4px; margin-bottom: 16px; }
.type-btn { flex: 1; background: transparent; color: var(--muted); border: none; border-radius: 7px; padding: 10px; cursor: pointer; font-weight: 600; }
.type-btn.active { background: var(--panel); color: var(--accent); }

.field { display: block; margin-bottom: 14px; }
.field > span { display: block; font-size: 0.8rem; color: var(--muted); margin-bottom: 6px; }
.field input[type="number"], .field input[type="text"], .field input[type="date"] {
  width: 100%; background: var(--panel-2); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px; color: var(--text); font-size: 1rem; outline: none;
}
.field input:focus { border-color: var(--accent-2); }

.cat-picker { display: flex; flex-wrap: wrap; gap: 7px; }
.cat-chip {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--panel-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 20px;
  padding: 8px 12px; cursor: pointer; font-size: 0.88rem;
}
.cat-chip.active { border-color: var(--c); color: var(--c); background: color-mix(in srgb, var(--c) 14%, transparent); }

.check { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; font-size: 0.9rem; cursor: pointer; }
.check input { width: 18px; height: 18px; }

.rs-title { font-size: 0.8rem; color: var(--muted); margin-bottom: 8px; }
.rs-chips { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 16px; }
.rs-chip { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); border-radius: 20px; padding: 7px 11px; cursor: pointer; font-size: 0.82rem; }
.rs-chip:hover { border-color: var(--accent-2); }

button.primary { background: var(--accent); color: #07210d; border: none; border-radius: 10px; padding: 13px; font-size: 1rem; font-weight: 700; cursor: pointer; }
button.big { width: 100%; }
button.primary:hover { filter: brightness(1.08); }

footer {
  text-align: center; padding: 14px;
  padding-bottom: calc(14px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--border);
  font-size: 0.82rem; color: var(--muted);
}

@media (max-width: 560px) {
  :root { font-size: 15px; }
  header { padding: 11px 14px; padding-top: calc(11px + env(safe-area-inset-top)); }
  header h1 { width: 100%; text-align: center; font-size: 1.05rem; }
  nav { width: 100%; justify-content: space-between; }
  .nav-btn { flex: 1; text-align: center; padding: 9px 4px; font-size: 0.85rem; }
  .sum-val { font-size: 1.1rem; }
  .sum-lbl { font-size: 0.68rem; }
  button, .nav-btn, .cat-chip, .type-btn, .month-nav { touch-action: manipulation; }
}