:root {
  --surface-1:      #fcfcfb;
  --page-plane:     #f9f9f7;
  --text-primary:   #0b0b0b;
  --text-secondary: #52514e;
  --text-muted:     #898781;
  --gridline:       #e1e0d9;
  --baseline:       #c3c2b7;
  --border:         rgba(11,11,11,0.10);

  --series-cash:    #2a78d6; /* blue   */
  --series-income:  #1baf7a; /* aqua   */
  --series-expense: #e34948; /* red    */
  --series-accent:  #4a3aa7; /* violet */

  /* Fixed-order categorical ramp (blue, aqua, yellow, green, violet, red,
     magenta, orange) — always assign in this order, never cycled/reordered
     by rank, so a filtered-down series set keeps its own color. */
  --cat-1: #2a78d6;
  --cat-2: #1baf7a;
  --cat-3: #eda100;
  --cat-4: #008300;
  --cat-5: #4a3aa7;
  --cat-6: #e34948;
  --cat-7: #e87ba4;
  --cat-8: #eb6834;

  --good:     #0ca30c;
  --critical: #d03b3b;
}

@media (prefers-color-scheme: dark) {
  :root {
    --surface-1:      #1a1a19;
    --page-plane:     #0d0d0d;
    --text-primary:   #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted:     #898781;
    --gridline:       #2c2c2a;
    --baseline:       #383835;
    --border:         rgba(255,255,255,0.10);

    --series-cash:    #3987e5;
    --series-income:  #199e70;
    --series-expense: #e66767;
    --series-accent:  #9085e9;

    --cat-1: #3987e5;
    --cat-2: #199e70;
    --cat-3: #c98500;
    --cat-4: #008300;
    --cat-5: #9085e9;
    --cat-6: #e66767;
    --cat-7: #d55181;
    --cat-8: #d95926;

    --good:     #0ca30c;
    --critical: #d03b3b;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--page-plane);
  color: var(--text-primary);
}

a { color: inherit; }

.app-shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--surface-1);
  border-right: 1px solid var(--border);
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand {
  font-weight: 600;
  font-size: 15px;
  padding: 0 10px 18px;
  color: var(--text-primary);
}
.brand span { color: var(--series-cash); }

.nav-link {
  display: block;
  padding: 9px 10px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 14px;
  color: var(--text-secondary);
}
.nav-link:hover { background: var(--gridline); }
.nav-link.active { background: var(--series-cash); color: #fff; }

.nav-spacer { flex: 1; }

.user-box {
  border-top: 1px solid var(--border);
  padding: 14px 10px 4px;
  font-size: 13px;
  color: var(--text-muted);
}
.user-box form { margin-top: 6px; }
.user-box button {
  background: none; border: none; padding: 0;
  color: var(--text-secondary); font-size: 13px; cursor: pointer; text-decoration: underline;
}

.main {
  flex: 1;
  padding: 28px 32px;
  max-width: 1100px;
}

.page-title {
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 4px;
}
.page-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0 0 24px;
}

.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

.grid {
  display: grid;
  gap: 16px;
}
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.stat-label {
  font-size: 12.5px;
  color: var(--text-muted);
  margin: 0 0 6px;
}
.stat-value {
  font-size: 26px;
  font-weight: 600;
  margin: 0;
}
.stat-value.cash { color: var(--series-cash); }
.stat-value.income { color: var(--series-income); }
.stat-value.expense { color: var(--series-expense); }
.stat-value.accent { color: var(--series-accent); }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}
th, td {
  text-align: left;
  padding: 9px 10px;
  border-bottom: 1px solid var(--gridline);
  font-variant-numeric: tabular-nums;
}
th {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
tr:last-child td { border-bottom: none; }
.num { text-align: right; }

.btn {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--series-cash);
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
}
.btn.secondary { background: var(--surface-1); color: var(--text-primary); }
.btn.danger { background: var(--critical); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.field { margin-bottom: 14px; }
.field label {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 5px;
}
.field input, .field select, .field textarea {
  width: 100%;
  padding: 9px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--page-plane);
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
}

.section-title {
  font-size: 14px;
  font-weight: 600;
  margin: 26px 0 12px;
  padding-top: 18px;
  border-top: 1px solid var(--gridline);
}

.row-line {
  display: grid;
  grid-template-columns: 1fr 1fr 2fr 1fr auto;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
}

.pill {
  display: inline-block;
  font-size: 11.5px;
  padding: 2px 8px;
  border-radius: 100px;
  background: var(--gridline);
  color: var(--text-secondary);
}

.badge-good { color: var(--good); }
.badge-critical { color: var(--critical); }

.flash {
  background: color-mix(in srgb, var(--good) 12%, var(--surface-1));
  border: 1px solid var(--good);
  color: var(--good);
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13.5px;
  margin-bottom: 18px;
}

.login-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-card {
  width: 340px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px;
}
.login-title { font-size: 18px; font-weight: 600; margin: 0 0 2px; }
.login-sub { font-size: 13px; color: var(--text-muted); margin: 0 0 22px; }
.login-error {
  background: color-mix(in srgb, var(--critical) 12%, var(--surface-1));
  border: 1px solid var(--critical);
  color: var(--critical);
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 16px;
}

.datepicker { position: relative; }
.datepicker-display { cursor: pointer; background: var(--page-plane); }
.datepicker-panel {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  z-index: 20;
  width: 240px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.18);
  padding: 10px;
}
.dp-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13.5px;
  font-weight: 600;
  margin-bottom: 8px;
}
.dp-nav {
  background: none;
  border: none;
  font-size: 16px;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 2px 8px;
  border-radius: 6px;
}
.dp-nav:hover { background: var(--gridline); }
.dp-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
  text-align: center;
}
.dp-dow { font-size: 11px; color: var(--text-muted); padding: 4px 0; }
.dp-day {
  background: none;
  border: none;
  padding: 6px 0;
  border-radius: 6px;
  font-size: 13px;
  color: var(--text-primary);
  cursor: pointer;
  font-variant-numeric: tabular-nums;
}
.dp-day:hover { background: var(--gridline); }
.dp-day.dp-selected { background: var(--series-cash); color: #fff; }

.chart-tooltip {
  position: absolute;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 12.5px;
  pointer-events: none;
  box-shadow: 0 4px 14px rgba(0,0,0,0.12);
  white-space: nowrap;
}

@media (max-width: 720px) {
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; flex-direction: row; overflow-x: auto; }
  .nav-spacer { display: none; }
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .row-line { grid-template-columns: 1fr; }
}