:root {
  color-scheme: light;
  --bg: #efe2c3;
  --panel: #fff8ea;
  --panel-soft: #f7eccf;
  --ink: #2a241b;
  --muted: #766d5f;
  --line: #deceb0;
  --line-strong: #cdb78f;
  --accent: #fda138;
  --accent-ink: #2f2111;
  --danger: #8e4b45;
  --shadow: 0 18px 48px rgba(75, 56, 24, 0.08);
  --radius: 8px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

:root[data-theme="calm"] {
  --bg: #dde6d5;
  --panel: #f8f8ef;
  --panel-soft: #edf2e6;
  --ink: #20281f;
  --muted: #667162;
  --line: #c7d1be;
  --line-strong: #aebca6;
  --accent: #fda138;
  --accent-ink: #2f2111;
  --danger: #8e4b45;
  --shadow: 0 18px 48px rgba(37, 55, 34, 0.08);
}

:root[data-theme="dusk"] {
  color-scheme: dark;
  --bg: #262721;
  --panel: #34342b;
  --panel-soft: #2f3028;
  --ink: #f1eadc;
  --muted: #bcb29d;
  --line: #4a4739;
  --line-strong: #625d4c;
  --accent: #fda138;
  --accent-ink: #2b1e10;
  --danger: #db8b7f;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.18);
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
}

body {
  color: var(--ink);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--panel) 38%, transparent), transparent 280px),
    var(--bg);
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.ui-icon {
  display: block;
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.shell {
  display: flex;
  flex-direction: column;
  width: 100%;
  min-height: 100dvh;
  padding: 16px;
  gap: 12px;
}

.app-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.view-tabs,
.mode-toggle,
.theme-options {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--panel) 72%, transparent);
}

.tab,
.mode-button,
.theme-button,
.quiet-button {
  min-height: 34px;
  border: 0;
  border-radius: 6px;
  color: var(--muted);
  background: transparent;
  white-space: nowrap;
}

.theme-button {
  padding: 0 14px;
}

.tab,
.mode-button {
  display: inline-grid;
  width: 38px;
  min-width: 38px;
  place-items: center;
  padding: 0;
  line-height: 1;
}

.tab .ui-icon {
  width: 18px;
  height: 18px;
  stroke-width: 1.7;
}

.settings-tab {
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 72%, transparent);
}

.tab-divider {
  width: 1px;
  height: 22px;
  margin: 0 4px;
  background: var(--line);
}

.quiet-button {
  padding: 0 11px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 64%, transparent);
}

.tab.is-active,
.mode-button.is-active,
.theme-button.is-active,
.quiet-button:hover,
.quiet-button:focus-visible {
  color: var(--ink);
  background: var(--panel);
  box-shadow: 0 3px 14px rgba(75, 56, 24, 0.07);
}

.quiet-button:disabled {
  cursor: default;
  opacity: 0.36;
  box-shadow: none;
}

.danger-button {
  color: var(--danger);
}

.view {
  display: none;
}

.view.is-active {
  display: flex;
  flex: 1;
  min-height: 0;
}

#tasksView {
  flex-direction: column;
  gap: 10px;
}

#noteView {
  flex-direction: column;
}

#settingsView {
  align-items: flex-start;
}

.settings-panel {
  display: grid;
  gap: 16px;
  width: min(720px, 100%);
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--panel) 72%, transparent);
  box-shadow: var(--shadow);
}

.setting-group {
  display: grid;
  gap: 8px;
}

.setting-label {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

.setting-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.task-control-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.task-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--panel) 78%, transparent);
  box-shadow: var(--shadow);
}

.task-form input {
  width: 100%;
  min-height: 42px;
  border: 0;
  outline: 0;
  padding: 0 12px;
  color: var(--ink);
  background: transparent;
}

.task-form input:focus-visible {
  border-radius: 6px;
  background: var(--panel);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--line-strong) 70%, var(--accent) 30%);
}

.task-form input::placeholder,
textarea::placeholder {
  color: #9c8d75;
}

.add-button {
  display: inline-grid;
  width: 42px;
  min-width: 42px;
  height: 42px;
  place-items: center;
  border: 0;
  border-radius: 6px;
  color: var(--accent-ink);
  font-size: 0;
  line-height: 1;
  background: var(--accent);
}

.add-button .ui-icon {
  width: 18px;
  height: 18px;
  stroke-width: 2.2;
}

.task-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.task-area {
  flex: 1;
  min-height: 0;
  overflow: auto;
}

.task-list {
  display: grid;
  gap: 8px;
}

.task-list.is-hidden,
.kanban-board.is-hidden {
  display: none;
}

.task-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--panel) 82%, transparent);
}

.task-main {
  display: grid;
  align-content: start;
  gap: 4px;
  min-width: 0;
}

.task-title-field {
  width: 100%;
  min-height: 34px;
  border: 1px solid transparent;
  border-radius: 6px;
  outline: 0;
  padding: 0 8px;
  color: var(--ink);
  background: transparent;
  font-weight: 560;
}

.task-title-field:hover,
.task-title-field:focus {
  border-color: var(--line);
  background: var(--panel);
}

.task-title-field:focus-visible {
  border-color: color-mix(in srgb, var(--line-strong) 70%, var(--accent) 30%);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}

.task-item .task-title-field[data-state="doing"] {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.task-item .task-title-field[data-state="done"] {
  text-decoration: line-through;
  color: var(--muted);
}

.task-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.state-icon {
  display: inline-grid;
  width: 18px;
  height: 18px;
  place-items: center;
  color: var(--muted);
}

.state-icon[data-status="new"],
.kanban-state-icon[data-status="new"] {
  color: #7895a5;
}

.state-icon[data-status="doing"],
.kanban-state-icon[data-status="doing"] {
  color: #c8a45f;
}

.state-icon[data-status="done"],
.kanban-state-icon[data-status="done"] {
  color: var(--accent);
}

.state-icon .ui-icon,
.icon-button .ui-icon,
.drag-handle .ui-icon {
  width: 16px;
  height: 16px;
}

.drag-handle .ui-icon {
  width: 18px;
  height: 18px;
  stroke-width: 2.1;
}

.task-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.icon-button {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--muted);
  background: color-mix(in srgb, var(--panel) 80%, transparent);
}

.icon-button:hover,
.icon-button:focus-visible {
  color: var(--ink);
  background: var(--panel);
  border-color: var(--line-strong);
}

.icon-button:disabled {
  cursor: default;
  opacity: 0.32;
}

.icon-button.delete {
  color: var(--danger);
}

.kanban-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(180px, 1fr));
  gap: 10px;
  min-height: 100%;
}

.kanban-column {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--panel) 46%, transparent);
  transition: background 140ms ease, border-color 140ms ease, box-shadow 140ms ease;
}

.kanban-column.is-drop-target {
  border-color: rgba(253, 161, 56, 0.7);
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  box-shadow: inset 0 0 0 1px rgba(253, 161, 56, 0.32);
}

.kanban-board.is-dragging .kanban-column {
  border-style: dashed;
}

.kanban-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
  padding: 0 2px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.kanban-title span:last-child {
  font-weight: 600;
}

.kanban-state-icon {
  display: inline-grid;
  width: auto;
  height: auto;
  place-items: center;
  color: var(--ink);
  line-height: 1;
}

.kanban-state-icon .ui-icon {
  width: 16px;
  height: 16px;
}

.kanban-stack {
  display: grid;
  align-content: start;
  gap: 8px;
  flex: 1;
}

.kanban-card {
  display: grid;
  gap: 8px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.kanban-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.kanban-card .task-actions {
  justify-content: flex-end;
}

.task-item.is-dragging,
.kanban-card.is-dragging {
  opacity: 0.5;
}

.drag-handle {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--muted);
  background: color-mix(in srgb, var(--panel) 72%, transparent);
  cursor: grab;
  line-height: 1;
}

.drag-handle:hover,
.drag-handle:focus-visible {
  color: var(--ink);
  border-color: var(--line-strong);
  background: var(--panel);
}

.drag-handle:active {
  cursor: grabbing;
}

.empty-state {
  min-height: 58px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--panel) 28%, transparent);
}

textarea {
  flex: 1;
  width: 100%;
  min-height: 0;
  resize: none;
  padding: clamp(18px, 4vw, 44px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  outline: 0;
  color: var(--ink);
  background: color-mix(in srgb, var(--panel) 78%, transparent);
  box-shadow: var(--shadow);
  line-height: 1.75;
}

textarea:focus-visible {
  border-color: color-mix(in srgb, var(--line-strong) 68%, var(--accent) 32%);
  box-shadow:
    0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent),
    var(--shadow);
}

button:focus-visible {
  outline: 3px solid rgba(253, 161, 56, 0.3);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

@media (max-width: 900px) {
  .kanban-board {
    grid-template-columns: 1fr;
  }

  .kanban-column {
    min-height: 180px;
  }
}

@media (max-width: 560px) {
  .shell {
    padding: 10px;
  }

  .app-bar,
  .task-control-row,
  .view-tabs,
  .mode-toggle,
  .theme-options,
  .settings-panel {
    width: 100%;
  }

  .app-bar {
    align-items: center;
    flex-direction: row;
  }

  .view-tabs {
    width: auto;
  }

  .mode-button,
  .theme-button {
    flex: 1;
  }

  .task-form,
  .task-item {
    grid-template-columns: 1fr;
  }

  .add-button {
    width: 100%;
    min-height: 40px;
  }

  .task-actions {
    justify-content: flex-end;
  }
}