:root {
  color-scheme: light;
  --bg: #f6f8fc;
  --card: #ffffff;
  --line: #dfe5f0;
  --ink: #1f2a44;
  --muted: #5b6a87;
  --accent: #3f7cff;
  --good: #19a56f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
}

.app-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--line);
  background: var(--card);
}

h1, h2, h3 {
  margin: 0;
}

.subtitle {
  margin: 0.35rem 0 0;
  color: var(--muted);
}

.streak-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.75rem 1rem;
  min-width: 140px;
  text-align: center;
  background: #f9fbff;
}

.streak-card span {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
}

.streak-card strong {
  display: block;
  margin-top: 0.25rem;
  color: var(--accent);
}

.layout {
  padding: 1rem 1.5rem 1.5rem;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1rem;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
}

.tab-button {
  border: 0;
  background: transparent;
  padding: 0.75rem 1rem;
  cursor: pointer;
  color: var(--muted);
}

.tab-button.active {
  color: var(--accent);
  border-bottom: 2px solid var(--accent);
  font-weight: 600;
}

.tab-content {
  display: none;
  padding: 1rem;
}

.tab-content.active {
  display: block;
}

.task-list {
  display: grid;
  gap: 0.65rem;
}

.task-row {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.7rem;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 0.5rem;
}

.task-main {
  min-width: 0;
}

.task-check {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.task-title {
  font-weight: 600;
}

.task-meta {
  color: var(--muted);
}

.task-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  justify-content: flex-end;
  flex-wrap: wrap;
}

input, select, button {
  font: inherit;
}

label {
  display: grid;
  gap: 0.2rem;
  color: var(--muted);
  font-size: 0.88rem;
}

input[type="text"],
input[type="number"],
select {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.45rem 0.55rem;
  color: var(--ink);
  background: #fff;
}

button {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.45rem 0.75rem;
  cursor: pointer;
  background: #fff;
}

button:hover {
  border-color: var(--accent);
}

.task-complete:checked + .task-title {
  text-decoration: line-through;
  color: var(--muted);
}

.control-panel {
  padding: 1rem;
}

.task-form {
  display: grid;
  gap: 0.7rem;
}

.stats {
  margin-top: 1rem;
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.stat {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.6rem;
  background: #fafcff;
}

.stat strong {
  display: block;
  color: var(--accent);
}

.gantt-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.75rem;
}

.gantt-calendar {
  display: grid;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  min-width: 520px;
  background: #fff;
}

.gantt-cal-cell {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 0.25rem 0.2rem;
  font-size: 0.72rem;
}

.gantt-cal-header {
  background: #f7f9ff;
  color: var(--muted);
  font-weight: 600;
  text-align: center;
}

.gantt-cal-taskname {
  font-weight: 600;
  font-size: 0.78rem;
  line-height: 1.25;
  align-self: center;
}

.gantt-cal-taskname.gantt-cal-done {
  color: var(--muted);
  text-decoration: line-through;
}

.gantt-cal-body {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  min-height: 48px;
  background: #fcfdff;
}

.gantt-cal-today {
  background: #fff8e6;
}

.gantt-block {
  width: 72%;
  min-height: 3px;
  border-radius: 3px 3px 1px 1px;
}

.gantt-block-weekly {
  background: #5c7fd6;
}

.gantt-block-monthly {
  background: #8b6bc9;
}

.gantt-block-daily {
  background: #3daa7a;
}

.schedule-legend {
  margin: 0 0 0.65rem;
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.45;
}

.schedule-overflow {
  margin: 0 0 0.65rem;
  font-size: 0.9rem;
  color: #b45309;
  font-weight: 500;
}

.gantt {
  min-width: 720px;
  display: grid;
  grid-template-columns: 220px repeat(13, 1fr);
}

.gantt-cell {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  min-height: 34px;
  padding: 0.35rem;
  font-size: 0.82rem;
}

.gantt-header {
  background: #f7f9ff;
  color: var(--muted);
  font-weight: 600;
}

.gantt-task {
  font-weight: 600;
}

.bar-holder {
  position: relative;
  grid-column: 2 / -1;
}

.bar {
  position: absolute;
  top: 7px;
  height: 20px;
  border-radius: 999px;
  background: #b7c9ff;
}

.bar.done {
  background: var(--good);
}

.empty-state {
  color: var(--muted);
}

.btn-secondary {
  background: #f4f6fb;
}

.budget-banner {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #f9fbff 0%, #ffffff 100%);
}

.budget-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.budget-row small {
  color: var(--muted);
  display: block;
}

.budget-row strong {
  font-size: 1.15rem;
  color: var(--ink);
}

.budget-meta {
  margin: 0.45rem 0 0;
  font-size: 0.88rem;
  color: var(--muted);
}

.budget-note {
  font-weight: 400;
  font-size: 0.85rem;
  color: var(--muted);
}

.refresh-cal-inline {
  margin-top: 0.65rem;
}

.focus-intro,
.focus-summary,
.focus-section-desc {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0 0 0.75rem;
  line-height: 1.45;
}

.focus-summary {
  font-weight: 600;
  color: var(--ink);
}

.focus-section {
  margin-top: 1.25rem;
}

.focus-section:first-of-type {
  margin-top: 0.5rem;
}

.focus-section-title {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.settings-grid {
  display: grid;
  gap: 1.25rem;
  max-width: 720px;
}

.settings-block {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1rem;
  background: #fafcff;
}

.settings-block h3 {
  margin-bottom: 0.35rem;
}

.settings-help {
  margin: 0 0 0.75rem;
  font-size: 0.88rem;
  color: var(--muted);
}

.settings-help code {
  font-size: 0.82rem;
}

.inline-check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.65rem;
}

.inline-check input {
  width: auto;
}

.settings-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.settings-status {
  margin: 0.75rem 0 0;
  font-size: 0.88rem;
  color: var(--muted);
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .task-row {
    grid-template-columns: 1fr;
  }
  .budget-row {
    grid-template-columns: 1fr;
  }
}