/* Root Colors */
:root {
  --bg: #f7f7fb;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --primary: #3b82f6;
  --positive: #16a34a;
  --negative: #ef4444;
  --ring: 0 0 0 3px rgba(59,130,246,.25);
  --shadow: 0 10px 20px rgba(2, 8, 23, 0.06), 0 2px 6px rgba(2, 8, 23, 0.08);
  --border: #e5e7eb;
}
body.dark {
  --bg: #0b1220;
  --card: #0f172a;
  --text: #e2e8f0;
  --muted: #9aa4b2;
  --primary: #60a5fa;
  --positive: #22c55e;
  --negative: #f87171;
  --border: #1f2937;
  --shadow: 0 10px 20px rgba(0,0,0,0.35), 0 2px 6px rgba(0,0,0,0.4);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--bg);
  color: var(--text);
  transition: background .2s ease, color .2s ease;
}
a { color: inherit; }

/* Layout */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 16px 40px;
  display: grid;
  grid-template-columns: 1.2fr 1.8fr;
  gap: 20px;
}

header {
  position: sticky;
  top: 0;
  backdrop-filter: saturate(180%) blur(8px);
  background: color-mix(in oklab, var(--bg), transparent 30%);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}
.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  gap: 12px;
}
.title { font-size: 1.2rem; font-weight: 700; letter-spacing: .3px; }

/* Toggle */
.toggle {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--card); border: 1px solid var(--border);
  padding: 8px 12px; border-radius: 999px; box-shadow: var(--shadow);
  cursor: pointer; user-select: none;
}
.toggle input { display: none; }
.toggle .dot {
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--primary);
  box-shadow: inset 0 0 0 2px color-mix(in oklab, var(--bg), transparent 70%);
}

/* Cards */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 16px;
}
.card h3 { margin: 0 0 8px; font-size: .95rem; color: var(--muted); font-weight: 600; }
.value { font-size: 1.6rem; font-weight: 800; letter-spacing: .3px; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }

.value.positive { color: var(--positive); }
.value.negative { color: var(--negative); }

.section-title { font-size: 1.05rem; font-weight: 700; margin: 0 0 10px; }

/* Form */
form .field { display: grid; gap: 6px; margin-bottom: 12px; }
label { font-size: .92rem; color: var(--muted); }
input[type="text"], input[type="number"], input[type="date"], select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--card), transparent 10%);
  color: var(--text);
  border-radius: 12px;
  outline: none;
  transition: box-shadow .15s ease, border-color .15s ease;
}
input:focus, select:focus { box-shadow: var(--ring); border-color: var(--primary); }

.actions { display: flex; gap: 10px; }
button {
  padding: 10px 14px; border: none; border-radius: 12px; cursor: pointer; font-weight: 700;
  box-shadow: var(--shadow);
}
.btn-primary { background: var(--primary); color: white; }
.btn-secondary { background: color-mix(in oklab, var(--bg), #000 5%); color: var(--text); }
.btn-danger { background: var(--negative); color: white; }
button:active { transform: translateY(1px); }

/* Filters */
.filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 12px; }
.filters input[type="search"] { flex: 1 1 220px; }

/* Transaction History */
.history {
  display: grid; gap: 12px;
  grid-template-rows: auto 1fr auto;
  min-height: 420px;
}
.list {
  overflow: auto; max-height: 520px; border: 1px solid var(--border); border-radius: 14px;
  background: color-mix(in oklab, var(--card), transparent 6%);
}
.row {
  display: grid; grid-template-columns: 1.2fr .9fr .9fr .7fr 36px; gap: 10px; align-items: center;
  padding: 10px 12px; border-bottom: 1px solid var(--border);
}
.row.header { position: sticky; top: 0; background: var(--card); z-index: 1; font-weight: 700; }
.row:last-child { border-bottom: none; }
.amount { font-weight: 800; text-align: right; }
.amount.income { color: var(--positive); }
.amount.expense { color: var(--negative); }
.del { background: transparent; border-radius: 10px; border: 1px solid var(--border); width: 32px; height: 32px; display: grid; place-items: center; cursor: pointer; }

.chart-card { display: grid; gap: 10px; }
canvas { width: 100%; height: 280px; display: block; }

footer { text-align: center; color: var(--muted); font-size: .85rem; margin-top: 16px; }

/* Responsive */
@media (max-width: 980px) {
  .container { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .row { grid-template-columns: 1.1fr .8fr .9fr .7fr 36px; }
}
@media (max-width: 520px) {
  .row { grid-template-columns: 1.2fr .8fr .8fr .7fr 36px; font-size: .92rem; }
  .value { font-size: 1.4rem; }
  .header-inner { padding: 12px 12px; }
  .container { padding: 16px 12px 28px; }
}