:root {
  color-scheme: light;
  --surface-1: #fcfcfb;
  --surface-2: #f9f9f7;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #898781;
  --gridline: #e1e0d9;
  --baseline: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --series-1: #2a78d6;
  --series-1-track: #b7d3f6;
  --status-good: #0ca30c;
  --status-warning: #fab219;
  --status-critical: #d03b3b;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --surface-1: #1a1a19;
    --surface-2: #0d0d0d;
    --text-primary: #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted: #898781;
    --gridline: #2c2c2a;
    --baseline: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --series-1: #3987e5;
    --series-1-track: #184f95;
    --status-good: #0ca30c;
    --status-warning: #fab219;
    --status-critical: #e66767;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --surface-1: #1a1a19;
  --surface-2: #0d0d0d;
  --text-primary: #ffffff;
  --text-secondary: #c3c2b7;
  --text-muted: #898781;
  --gridline: #2c2c2a;
  --baseline: #383835;
  --border: rgba(255, 255, 255, 0.10);
  --series-1: #3987e5;
  --series-1-track: #184f95;
  --status-good: #0ca30c;
  --status-warning: #fab219;
  --status-critical: #e66767;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--surface-2);
  color: var(--text-primary);
}

.app {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}

h1 {
  font-size: 22px;
  margin: 0 0 4px;
}

.subtitle {
  color: var(--text-secondary);
  margin: 0 0 24px;
  font-size: 14px;
}

.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  margin-bottom: 16px;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.stat-tile {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
}

.stat-tile .label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.stat-tile .value {
  font-size: 28px;
  font-weight: 600;
}

section h2 {
  font-size: 16px;
  margin: 28px 0 12px;
}

form.inline-form {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: flex-end;
}

form.inline-form .field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

form.inline-form label {
  font-size: 12px;
  color: var(--text-secondary);
}

input, textarea {
  font: inherit;
  color: var(--text-primary);
  background: var(--surface-1);
  border: 1px solid var(--baseline);
  border-radius: 6px;
  padding: 7px 9px;
}

input:focus, textarea:focus, button:focus-visible {
  outline: 2px solid var(--series-1);
  outline-offset: 1px;
}

button {
  font: inherit;
  cursor: pointer;
  background: var(--series-1);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 8px 14px;
  font-weight: 600;
}

button.secondary {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--baseline);
}

button.danger {
  background: transparent;
  color: var(--status-critical);
  border: 1px solid var(--status-critical);
}

.error-banner {
  background: color-mix(in srgb, var(--status-critical) 12%, var(--surface-1));
  color: var(--status-critical);
  border: 1px solid var(--status-critical);
  border-radius: 8px;
  padding: 8px 12px;
  margin-bottom: 12px;
  font-size: 13px;
}

.todo-card .todo-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.todo-title {
  font-size: 16px;
  font-weight: 600;
  margin: 0;
}

.todo-desc {
  color: var(--text-secondary);
  font-size: 13px;
  margin: 4px 0 0;
}

.todo-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-secondary);
  margin: 10px 0 6px;
}

.meter {
  height: 10px;
  border-radius: 5px;
  background: var(--series-1-track);
  overflow: hidden;
  margin: 8px 0 4px;
}

.meter .fill {
  height: 100%;
  background: var(--series-1);
  border-radius: 5px 0 0 5px;
  transition: width 0.2s ease;
}

.allocation-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.allocation-hint.ok {
  color: var(--status-good);
}

ul.milestone-list {
  list-style: none;
  padding: 0;
  margin: 0 0 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.milestone-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.milestone-row.complete .m-title {
  text-decoration: line-through;
  color: var(--text-muted);
}

.milestone-row .m-title {
  flex: 1;
  font-size: 14px;
}

.milestone-row .m-hours {
  font-size: 12px;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.milestone-row button.icon-btn {
  background: transparent;
  color: var(--text-muted);
  border: none;
  padding: 2px 6px;
  font-size: 13px;
}

.card-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 8px;
}

.chart-card svg {
  width: 100%;
  height: auto;
  display: block;
  overflow: visible;
}

.chart-title {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 0 0 10px;
}

.chart-tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  transform: translate(-50%, -110%);
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.1s ease;
}

.chart-tooltip .t-date {
  color: var(--text-muted);
  margin-bottom: 2px;
}

.chart-tooltip .t-value {
  color: var(--text-primary);
  font-weight: 600;
}

.chart-wrap {
  position: relative;
}

.empty-state {
  color: var(--text-muted);
  font-size: 14px;
  padding: 20px 0;
  text-align: center;
}

@media (max-width: 520px) {
  .todo-head { flex-direction: column; }
}