:root {
  --bg: #0f1320;
  --panel: #1a2032;
  --panel2: #232b42;
  --text: #e6e9f2;
  --muted: #97a0b8;
  --thu: #2e9e5b;
  --chi: #e3564f;
  --accent: #4a7dff;
  --border: #2c344c;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

/* Topbar */
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 22px; background: var(--panel); border-bottom: 1px solid var(--border);
  flex-wrap: wrap; gap: 12px;
}
.brand { font-size: 20px; font-weight: 700; }
.controls { display: flex; gap: 10px; align-items: center; }
select, input, button { font-size: 14px; font-family: inherit; }
select, input {
  background: var(--panel2); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px;
}
.seg { display: inline-flex; background: var(--panel2); border-radius: 8px; overflow: hidden; border: 1px solid var(--border); }
.seg button { background: transparent; color: var(--muted); border: none; padding: 8px 14px; cursor: pointer; }
.seg button.active { background: var(--accent); color: #fff; }
#refreshBtn { background: var(--panel2); color: var(--text); border: 1px solid var(--border); border-radius: 8px; padding: 8px 12px; cursor: pointer; }
.sheet-link { background: #1a7f4b; color: #fff; text-decoration: none; border-radius: 8px; padding: 8px 12px; font-size: 14px; }
.sheet-link:hover { background: #22a25f; }

/* Tabs */
.tabs { display: flex; gap: 4px; padding: 0 22px; background: var(--panel); border-bottom: 1px solid var(--border); }
.tabs button {
  background: transparent; color: var(--muted); border: none;
  padding: 12px 18px; cursor: pointer; border-bottom: 3px solid transparent; font-size: 15px;
}
.tabs button.active { color: var(--text); border-bottom-color: var(--accent); }

.demo-banner { background: #e0a23b; color: #1a1300; text-align: center; padding: 8px 16px; font-size: 13px; font-weight: 600; }

/* Login */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 28px; width: 320px; max-width: 92vw; display: flex; flex-direction: column; gap: 12px; }
.login-card .brand { font-size: 20px; font-weight: 700; text-align: center; }
.login-card h2 { margin: 0; font-size: 16px; font-weight: 600; text-align: center; color: var(--muted); }
.login-card input { background: var(--panel2); color: var(--text); border: 1px solid var(--border); border-radius: 8px; padding: 11px 12px; font-size: 15px; }
.login-card button { background: var(--accent); color: #fff; border: none; border-radius: 8px; padding: 11px; cursor: pointer; font-size: 15px; }
.login-error { background: rgba(227,86,79,.15); color: var(--chi); padding: 9px 12px; border-radius: 8px; font-size: 13px; text-align: center; }
.user-chip { color: var(--muted); font-size: 14px; }
.user-chip a { color: var(--accent); text-decoration: none; margin-left: 8px; }
.hidden { display: none !important; }
.group-sum { background: var(--panel2); border-radius: 8px; padding: 12px; margin-top: 10px; font-size: 14px; line-height: 1.6; }

main { padding: 22px; max-width: 1100px; margin: 0 auto; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.period-label { color: var(--muted); margin-bottom: 14px; font-size: 15px; }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 22px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.card .label { color: var(--muted); font-size: 13px; margin-bottom: 6px; }
.card .value { font-size: 22px; font-weight: 700; }
.card.thu .value { color: var(--thu); }
.card.chi .value { color: var(--chi); }
.card.sodu .value { color: var(--accent); }

/* Charts */
.charts { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.chart-box { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.chart-box h3 { margin: 0 0 12px; font-size: 15px; font-weight: 600; }

/* Table */
.tbl { width: 100%; border-collapse: collapse; background: var(--panel); border-radius: 12px; overflow: hidden; }
.tbl th, .tbl td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
.tbl th { color: var(--muted); font-weight: 600; }
.tbl td.right, .tbl th.right { text-align: right; }
.tbl .empty { text-align: center; color: var(--muted); padding: 24px; }
.badge { padding: 2px 8px; border-radius: 6px; font-size: 12px; }
.badge.thu { background: rgba(46,158,91,.18); color: var(--thu); }
.badge.chi { background: rgba(227,86,79,.18); color: var(--chi); }
.badge.chip { background: rgba(74,125,255,.18); color: var(--accent); }
.budget-item.total { border-color: var(--accent); }
.budget-form .tag { color: var(--muted); align-self: center; font-size: 14px; }
.del-btn { background: transparent; border: none; color: var(--muted); cursor: pointer; font-size: 16px; }
.del-btn:hover { color: var(--chi); }

/* Budgets */
.budget-form, #catForm { display: flex; gap: 10px; margin-bottom: 20px; flex-wrap: wrap; }
.budget-form button, #catForm button { background: var(--accent); color: #fff; border: none; border-radius: 8px; padding: 8px 16px; cursor: pointer; }
.budget-list { display: grid; gap: 12px; }
.budget-item { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 14px; }
.budget-item .head { display: flex; justify-content: space-between; margin-bottom: 8px; }
.bar { height: 10px; background: var(--panel2); border-radius: 6px; overflow: hidden; }
.bar > span { display: block; height: 100%; background: var(--thu); }
.bar > span.warn { background: #e0a23b; }
.bar > span.over { background: var(--chi); }

/* Config */
.config-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 24px; }
.config-grid .row { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; }
.config-grid .row .k { color: var(--muted); font-size: 12px; }
.config-grid .row .v { font-size: 15px; margin-top: 4px; word-break: break-all; }
.add-cat h3 { font-size: 15px; }

/* Config forms */
.cfg-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.cfg-card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.cfg-card.wide { grid-column: 1 / -1; }
.cfg-card h3 { margin: 0 0 14px; font-size: 15px; }
.cfg-card label { display: block; color: var(--muted); font-size: 13px; margin-bottom: 10px; }
.cfg-card label input[type=number], .cfg-card label input[type=text], .cfg-card label select {
  display: block; width: 100%; margin-top: 4px;
}
.cfg-card label.chk { display: flex; align-items: center; gap: 8px; color: var(--text); }
.cfg-card label.chk input { width: auto; margin: 0; }
.cfg-card button[data-save], #userForm button, #catForm button {
  background: var(--accent); color: #fff; border: none; border-radius: 8px; padding: 8px 16px; cursor: pointer; margin-top: 6px;
}
.hint { color: var(--muted); font-size: 12px; margin: 10px 0 0; }
.inline-form { display: flex; gap: 8px; margin: 10px 0; flex-wrap: wrap; }
.inline-form input { flex: 1; min-width: 120px; }
.mini-list { display: flex; flex-direction: column; gap: 6px; margin-bottom: 6px; }
.mini-item { display: flex; justify-content: space-between; align-items: center; background: var(--panel2); border-radius: 8px; padding: 7px 12px; font-size: 14px; }
.mini-item .acts { display: flex; gap: 8px; }
.mini-item button { background: transparent; border: none; cursor: pointer; color: var(--muted); font-size: 14px; }
.mini-item button:hover { color: var(--text); }
.mini-item button.del:hover { color: var(--chi); }

.foot { text-align: center; color: var(--muted); padding: 20px; font-size: 13px; }

/* Toast */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--panel2); color: var(--text); padding: 12px 20px; border-radius: 10px;
  border: 1px solid var(--border); opacity: 0; pointer-events: none; transition: opacity .25s;
}
.toast.show { opacity: 1; }

@media (max-width: 760px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .charts, .config-grid { grid-template-columns: 1fr; }
}