:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #898781;
  --grid: #e1e0d9;
  --baseline: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --blue: #2a78d6;
  --red: #e34948;
  --good: #006300;
  --bad: #d03b3b;
  --accent: #2a78d6;
}
@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --text-primary: #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted: #898781;
    --grid: #2c2c2a;
    --baseline: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --blue: #3987e5;
    --red: #e66767;
    --good: #0ca30c;
    --bad: #e66767;
    --accent: #3987e5;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --text-primary: #ffffff;
  --text-secondary: #c3c2b7;
  --text-muted: #898781;
  --grid: #2c2c2a;
  --baseline: #383835;
  --border: rgba(255, 255, 255, 0.10);
  --blue: #3987e5;
  --red: #e66767;
  --good: #0ca30c;
  --bad: #e66767;
  --accent: #3987e5;
}

* { box-sizing: border-box; }

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

.topbar {
  padding: 1rem 1.5rem 0;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.topbar h1 { font-size: 1.25rem; margin: 0; }
.topbar-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: .75rem;
}
.logout-link {
  font-size: .82rem;
  color: var(--text-muted);
  text-decoration: none;
}
.logout-link:hover { color: var(--accent); }

.tabs { display: flex; gap: .25rem; flex-wrap: wrap; }
.tab-btn {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  padding: .6rem 1rem;
  font-size: .9rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
}
.tab-btn:hover { color: var(--text-primary); }
.tab-btn.active {
  color: var(--text-primary);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

main { max-width: 900px; margin: 0 auto; padding: 1.25rem; }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}
.card h3 { margin-top: 0; font-size: 1rem; }

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: .75rem;
  margin-bottom: 1rem;
}
.month-nav { display: flex; gap: .4rem; align-items: center; }
.month-nav select, .month-nav button {
  padding: .4rem .6rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-primary);
  font-size: .9rem;
}
.month-nav button { cursor: pointer; }

.month-totals { font-size: .9rem; color: var(--text-secondary); text-align: right; }
.month-totals b { color: var(--text-primary); }

.form-grid {
  display: flex;
  flex-wrap: wrap;
  gap: .9rem;
  align-items: end;
}
.form-grid label {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  font-size: .8rem;
  color: var(--text-secondary);
}
.form-grid label.grow { flex: 1; min-width: 160px; }
.form-grid input[type=text], .form-grid input[type=date],
.form-grid input[type=time], .form-grid input[type=number] {
  padding: .45rem .55rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--page);
  color: var(--text-primary);
  font-size: .9rem;
}
.hint { font-weight: 400; color: var(--text-muted); font-size: .75rem; }
.form-grid label.checkbox {
  flex-direction: row;
  align-items: center;
  gap: .4rem;
  font-size: .85rem;
}
.form-actions { display: flex; gap: .5rem; }

button {
  font-family: inherit;
}
.form-actions button, .month-nav button {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: .5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: .85rem;
}
.form-actions button.secondary {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.form-actions button.danger { background: var(--bad); }
.hidden { display: none !important; }

table { width: 100%; border-collapse: collapse; font-size: .88rem; }
th, td { text-align: left; padding: .5rem .5rem; border-bottom: 1px solid var(--grid); }
th { color: var(--text-muted); font-weight: 500; font-size: .78rem; text-transform: uppercase; letter-spacing: .03em; }
tr.weekend td { color: var(--text-muted); }
tr.is-today { background: color-mix(in srgb, var(--accent) 10%, transparent); }
td.diff-pos { color: var(--good); font-variant-numeric: tabular-nums; }
td.diff-neg { color: var(--bad); font-variant-numeric: tabular-nums; }
td.num { font-variant-numeric: tabular-nums; }
.badge {
  display: inline-block;
  font-size: .72rem;
  padding: .1rem .45rem;
  border-radius: 999px;
  background: var(--grid);
  color: var(--text-secondary);
  margin-right: .25rem;
}
.row-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: .8rem;
  padding: .2rem .4rem;
}
.row-btn:hover { color: var(--accent); }
.row-btn.danger:hover { color: var(--bad); }

.simple-table { margin-top: .5rem; }

.summary-line { margin-top: .6rem; font-size: .88rem; color: var(--text-secondary); }
.summary-line b { color: var(--text-primary); }

.clock-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.clock-status { font-size: .95rem; color: var(--text-secondary); }
.clock-status b { color: var(--text-primary); }
.clock-status .dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: .4rem;
  background: var(--text-muted);
}
.clock-status.active .dot { background: var(--good); }
.clock-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: .65rem 1.4rem;
  border-radius: 8px;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
}
.clock-btn.active { background: var(--bad); }

.session-chip {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  background: var(--grid);
  color: var(--text-secondary);
  border-radius: 999px;
  padding: .15rem .3rem .15rem .55rem;
  font-size: .78rem;
  margin: 0 .25rem .25rem 0;
  font-variant-numeric: tabular-nums;
}
.session-chip.open { color: var(--text-primary); background: color-mix(in srgb, var(--accent) 16%, var(--grid)); }
.session-chip button {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: .75rem;
  padding: 0 .2rem;
  line-height: 1;
}
.session-chip button:hover { color: var(--accent); }
.session-chip button.del:hover { color: var(--bad); }

.weekday-grid { flex-direction: column; align-items: stretch; }
.weekday-grid .weekday-row { display: flex; align-items: center; gap: .75rem; }
.weekday-grid .weekday-row label { flex-direction: row; align-items: center; gap: .5rem; width: 140px; }
.weekday-grid input[type=number] { width: 90px; }

.toast {
  position: fixed;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-primary);
  color: var(--page);
  padding: .55rem 1rem;
  border-radius: 8px;
  font-size: .85rem;
  z-index: 50;
}

/* Bar chart */
.viz-root {
  --surface-1: var(--surface);
}
.bar-chart-caption {
  display: flex;
  gap: 1.25rem;
  font-size: .8rem;
  color: var(--text-secondary);
  margin-top: .5rem;
}
.bar-chart-caption .swatch {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  margin-right: .35rem;
  vertical-align: middle;
}
.chart-tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--text-primary);
  color: var(--page);
  font-size: .78rem;
  padding: .35rem .55rem;
  border-radius: 6px;
  transform: translate(-50%, -110%);
  white-space: nowrap;
  opacity: 0;
  transition: opacity .1s ease;
  z-index: 10;
}