:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-soft: #eef4fb;
  --text: #182033;
  --muted: #657087;
  --line: #dde6f2;
  --accent: #2f7df6;
  --accent-dark: #1f5fc6;
  --danger: #d63f3f;
  --shadow: 0 12px 30px rgba(29, 46, 76, 0.12);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle, rgba(47, 125, 246, 0.13) 1px, transparent 1px),
    var(--bg);
  background-size: 22px 22px;
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.hidden {
  display: none !important;
}

.app-shell {
  width: min(100%, 960px);
  margin: 0 auto;
  padding: 24px 16px 40px;
}

.app-header {
  display: block;
  padding: 10px 2px 18px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 8px;
  font-size: clamp(2rem, 8vw, 3.5rem);
  line-height: 1.08;
}

h2 {
  margin-bottom: 14px;
  font-size: 1.08rem;
}

.header-copy {
  max-width: 34rem;
  margin-bottom: 0;
  color: var(--muted);
}

.sync-panel {
  position: relative;
  width: 100%;
}

.mode-account-panels {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.mode-account-panels .sync-panel {
  grid-column: 1 / -1;
}

.mode-account-panels > .sync-panel {
  grid-column: auto;
}

.login-context-status {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  grid-column: 1 / -1;
  min-height: 40px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfdff;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 900;
}

.login-context-badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 10px;
  border-radius: 999px;
  background: #edf3fb;
  color: var(--muted);
}

.login-context-badge.connected,
.login-context-badge.personal {
  background: #eaf7f1;
  color: #167255;
}

.login-context-badge.group {
  background: #fff4e8;
  color: #9a5a16;
}

.login-context-badge.offline {
  background: #eef1f5;
  color: var(--muted);
}

.sync-toggle-button {
  display: grid;
  gap: 2px;
  width: 100%;
  min-height: 46px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--text);
  box-shadow: 0 8px 20px rgba(29, 46, 76, 0.08);
  text-align: left;
}

.sync-toggle-button span {
  font-size: 0.9rem;
  font-weight: 900;
}

.sync-toggle-button small {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
}

.sync-toggle-button:focus {
  outline: 3px solid rgba(47, 125, 246, 0.16);
  outline-offset: 3px;
}

.sync-account-panel {
  position: static;
  z-index: 12;
  width: 100%;
  margin-top: 8px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.sync-account-panel.hidden {
  display: none;
}

.sync-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.sync-heading h2 {
  margin-bottom: 0;
}

.sync-heading span {
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 800;
}

.sync-form {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.sync-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.secondary-button {
  min-height: 48px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #edf3fb;
  color: var(--accent-dark);
  font-weight: 800;
}

.secondary-button:disabled {
  background: #eef1f5;
  color: var(--muted);
  cursor: not-allowed;
}

.sync-logout-button {
  background: #f7eaea;
  color: var(--danger);
}

.sync-logout-button.hidden {
  display: none;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 18px;
}

.summary-card {
  min-width: 0;
  padding: 14px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 8px 20px rgba(29, 46, 76, 0.08);
}

.summary-label {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
}

.summary-card strong {
  display: block;
  margin-top: 4px;
  font-size: 1.6rem;
  line-height: 1;
}

.mode-switch {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 18px;
  padding: 6px;
  background: var(--surface-soft);
}

.mode-button {
  min-height: 46px;
  border: 2px solid transparent;
  border-radius: 12px;
  background: transparent;
  color: var(--muted);
  font-weight: 900;
}

.mode-button.active {
  border-color: rgba(47, 125, 246, 0.18);
  background: var(--surface);
  color: var(--accent-dark);
  box-shadow: 0 6px 16px rgba(29, 46, 76, 0.1);
}

.group-panel {
  display: grid;
  gap: 16px;
  margin-bottom: 18px;
}

.group-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 280px);
  gap: 14px;
  align-items: start;
}

.group-heading h2 {
  margin-bottom: 4px;
}

.group-heading p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

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

.group-progress-top,
.group-stats {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.group-progress-top strong {
  color: var(--accent-dark);
  font-size: 1.35rem;
}

.group-progress-top span,
.group-stats {
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 800;
}

.group-progress-track {
  height: 12px;
  overflow: hidden;
  border-radius: 999px;
  background: #edf3fb;
}

.group-progress-track span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
  transition: width 0.2s ease;
}

.group-editor {
  display: grid;
  gap: 10px;
}

.group-input-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 8px;
}

.group-input-row input {
  min-width: 0;
  min-height: 48px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfdff;
  color: var(--text);
}

.group-input-row input:focus {
  border-color: var(--accent);
  outline: 3px solid rgba(47, 125, 246, 0.16);
}

.group-delete-button {
  background: #f7eaea;
  color: var(--danger);
}

.group-member-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.group-member-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px 12px;
  min-height: 42px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfdff;
}

.member-progress-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.group-member-item span,
.member-progress-top span {
  overflow-wrap: anywhere;
  font-weight: 800;
}

.group-member-item small,
.member-progress-top small {
  color: var(--muted);
  font-weight: 900;
}

.member-progress-track {
  grid-column: 1;
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: #edf3fb;
}

.member-progress-track span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: #2f9e77;
}

.member-delete-button {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: center;
  min-height: 34px;
  padding: 0 10px;
  border: 0;
  border-radius: 10px;
  background: #f7eaea;
  color: var(--danger);
  font-size: 0.82rem;
  font-weight: 800;
}

.group-member-empty {
  padding: 12px;
  border: 1px dashed var(--line);
  border-radius: 12px;
  color: var(--muted);
  text-align: center;
}

.panel {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.task-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.field {
  display: grid;
  gap: 7px;
}

.field-wide {
  grid-column: 1 / -1;
}

.field span {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
}

.field-hint {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.field input,
.field textarea,
.field select {
  width: 100%;
  min-height: 48px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfdff;
  color: var(--text);
}

.datetime-field {
  position: relative;
  display: grid;
  gap: 3px;
  min-height: 48px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfdff;
}

.datetime-field input {
  position: relative;
  z-index: 2;
  min-height: 46px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: transparent;
  caret-color: transparent;
}

.datetime-field input:focus {
  outline: 0;
}

.datetime-field input::-webkit-datetime-edit,
.datetime-field input::-webkit-datetime-edit-fields-wrapper,
.datetime-field input::-webkit-datetime-edit-text,
.datetime-field input::-webkit-datetime-edit-month-field,
.datetime-field input::-webkit-datetime-edit-day-field,
.datetime-field input::-webkit-datetime-edit-year-field,
.datetime-field input::-webkit-datetime-edit-hour-field,
.datetime-field input::-webkit-datetime-edit-minute-field,
.datetime-field input::-webkit-datetime-edit-ampm-field {
  color: transparent;
}

.datetime-display {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  padding: 0 44px 0 12px;
  color: var(--text);
  font-weight: 800;
  pointer-events: none;
}

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

.datetime-field:focus-within {
  border-color: var(--accent);
  outline: 3px solid rgba(47, 125, 246, 0.16);
}

.field select[multiple] {
  min-height: 112px;
  padding: 8px;
}

.field textarea {
  min-height: 92px;
  padding: 12px 13px;
  resize: vertical;
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  border-color: var(--accent);
  outline: 3px solid rgba(47, 125, 246, 0.16);
}

.option-field {
  min-width: 0;
}

.option-select-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 7px;
}

.option-edit-button {
  min-width: 64px;
  height: 48px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #edf3fb;
  color: var(--accent-dark);
  font-size: 0.9rem;
  font-weight: 800;
}

.option-edit-button:disabled {
  background: #eef1f5;
  color: var(--muted);
  cursor: not-allowed;
}

.modal-open {
  overflow: hidden;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(24, 32, 51, 0.42);
}

.modal-overlay.hidden {
  display: none;
}

.modal-panel {
  width: min(100%, 560px);
  max-height: min(86vh, 720px);
  overflow: auto;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 24px 60px rgba(24, 32, 51, 0.28);
}

.modal-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.modal-heading h2 {
  margin-bottom: 0;
}

.modal-close-button {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 50%;
  background: #eef1f5;
  color: var(--muted);
  font-size: 1.2rem;
  font-weight: 900;
}

.option-add-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 52px auto;
  gap: 8px;
  align-items: center;
}

.editable-option-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 52px 42px 42px auto;
  gap: 8px;
  align-items: center;
}

.option-add-row {
  margin-bottom: 14px;
}

.editable-option-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.option-add-row input,
.editable-option-item input {
  min-width: 0;
  min-height: 42px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfdff;
  color: var(--text);
}

.option-add-row input:focus,
.editable-option-item input:focus {
  border-color: var(--accent);
  outline: 3px solid rgba(47, 125, 246, 0.16);
}

.color-input {
  width: 52px;
  padding: 4px;
}

.option-add-row button,
.editable-option-item button {
  min-height: 42px;
  padding: 0 14px;
  border: 0;
  border-radius: 12px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 800;
}

.editable-option-item .option-delete-button {
  background: #f7eaea;
  color: var(--danger);
}

.editable-option-item .option-move-button {
  padding: 0;
  background: #edf3fb;
  color: var(--accent-dark);
}

.option-add-row button:disabled,
.editable-option-item button:disabled {
  background: var(--muted);
  color: #ffffff;
  cursor: not-allowed;
}

.primary-button {
  grid-column: 1 / -1;
  min-height: 50px;
  border: 0;
  border-radius: 14px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 800;
  box-shadow: 0 10px 22px rgba(47, 125, 246, 0.24);
}

.primary-button:active {
  background: var(--accent-dark);
  transform: translateY(1px);
}

.primary-button:disabled {
  background: var(--muted);
  cursor: not-allowed;
  box-shadow: none;
}

.filter-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 18px 0;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-soft);
}

.filter-button {
  min-height: 44px;
  border: 2px solid transparent;
  border-radius: 12px;
  background: transparent;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 800;
}

.filter-button.active {
  background: var(--surface);
  color: var(--accent-dark);
  box-shadow: 0 6px 16px rgba(29, 46, 76, 0.1);
}

.category-filter-panel {
  position: relative;
  margin: -8px 0 18px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-soft);
}

.task-tools-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(180px, 240px);
  gap: 12px;
  margin: -8px 0 18px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: 0 8px 20px rgba(29, 46, 76, 0.08);
}

.help-panel {
  margin-bottom: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.help-panel summary {
  min-height: 48px;
  padding: 13px 16px;
  color: var(--accent-dark);
  font-weight: 900;
  cursor: pointer;
}

.help-content,
.help-grid {
  display: grid;
  gap: 12px;
  padding: 0 16px 16px;
}

.help-content section,
.help-grid article {
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.help-content h2 {
  margin-bottom: 6px;
  font-size: 0.95rem;
}

.help-content p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.category-filter-label {
  display: block;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 800;
}

.category-combobox {
  position: relative;
}

.category-filter-toggle {
  position: relative;
  width: 100%;
  min-height: 46px;
  padding: 0 42px 0 13px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text);
  font-weight: 800;
  text-align: left;
}

.category-filter-toggle::after {
  content: "▾";
  position: absolute;
  right: 14px;
  color: var(--muted);
}

.category-filter-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  z-index: 10;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.category-filter-menu.hidden {
  display: none;
}

.category-filter-menu input {
  width: 100%;
  min-height: 42px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfdff;
  color: var(--text);
}

.category-filter-menu input:focus {
  border-color: var(--accent);
  outline: 3px solid rgba(47, 125, 246, 0.16);
}

.category-filter-list {
  display: grid;
  gap: 6px;
  max-height: 220px;
  margin: 9px 0 0;
  padding: 0;
  overflow: auto;
  list-style: none;
}

.category-filter-option {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr) 20px;
  gap: 9px;
  align-items: center;
  width: 100%;
  min-height: 40px;
  padding: 0 10px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  font-weight: 800;
  text-align: left;
}

.category-filter-option[aria-selected="true"] {
  border-color: var(--accent);
  background: #edf3fb;
  color: var(--accent-dark);
}

.category-filter-swatch {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--category-color, var(--line));
}

.category-filter-name {
  overflow-wrap: anywhere;
}

.category-filter-check {
  color: var(--accent-dark);
  font-weight: 900;
  opacity: 0;
  text-align: center;
}

.category-filter-option[aria-selected="true"] .category-filter-check {
  opacity: 1;
}

.category-filter-empty {
  padding: 12px;
  color: var(--muted);
  text-align: center;
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.section-heading h2 {
  margin-bottom: 0;
}

.section-heading span {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 0.85rem;
}

.task-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.task-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  gap: 12px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-left: 6px solid var(--priority-color);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.task-card.priority-high {
  --priority-color: #e25555;
}

.task-card.priority-medium {
  --priority-color: #d89a19;
}

.task-card.priority-low {
  --priority-color: #2f9e77;
}

.task-card.completed {
  opacity: 0.72;
}

.task-card.completed .task-title {
  color: var(--muted);
  text-decoration: line-through;
}

.task-card.due-today {
  background: #fffbed;
}

.task-card.due-tomorrow {
  background: #f7fbff;
}

.task-card.due-soon {
  background: #fbfff7;
}

.task-card.overdue {
  background: #fff2f2;
  border-color: #f0b7b7;
}

.complete-button,
.delete-button {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
}

.complete-button {
  border: 2px solid var(--priority-color);
  background: #ffffff;
  color: var(--priority-color);
  font-weight: 900;
}

.task-card.completed .complete-button {
  background: var(--priority-color);
  color: #ffffff;
}

.delete-button {
  border: 0;
  background: #f7eaea;
  color: var(--danger);
  font-size: 1.2rem;
  font-weight: 800;
}

.task-content {
  min-width: 0;
  padding: 4px;
  border-radius: 12px;
  cursor: pointer;
}

.task-content:hover {
  background: rgba(47, 125, 246, 0.06);
}

.task-content:focus {
  outline: 3px solid rgba(47, 125, 246, 0.16);
  outline-offset: 3px;
}

.task-title {
  overflow-wrap: anywhere;
  font-size: 1rem;
  font-weight: 800;
}

.task-memo {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.task-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 8px;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 9px;
  border-radius: 999px;
  background: #edf3fb;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.priority-badge {
  background: #fff4e8;
  color: var(--priority-color);
}

.category-badge {
  background: #eaf7f1;
  color: #167255;
}

.mode-badge {
  background: #eef0ff;
  color: #4c58b8;
}

.personal-mode-badge {
  background: #eaf7f1;
  color: #167255;
}

.group-mode-badge {
  background: #fff4e8;
  color: #9a5a16;
}

.task-card.category-job .category-badge {
  background: #eef0ff;
  color: #4c58b8;
}

.task-card.category-daily .category-badge {
  background: #fff0df;
  color: #9a5a16;
}

.deadline-badge.due-today {
  background: #fff0b8;
  color: #8b6300;
}

.deadline-badge.due-tomorrow {
  background: #dff0ff;
  color: #1f5f8f;
}

.deadline-badge.due-soon {
  background: #e7f7d8;
  color: #3f7a1f;
}

.start-badge {
  background: #eef0ff;
  color: #4c58b8;
}

.estimate-badge {
  background: #eaf7f1;
  color: #167255;
}

.actual-time-badge {
  background: #fff4e8;
  color: #9a5a16;
}

.subtask-progress {
  display: grid;
  gap: 6px;
  margin-top: 10px;
}

.subtask-progress-top {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.subtask-progress-track {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: #edf3fb;
}

.subtask-progress-track span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: #2f9e77;
}

.timer-button {
  min-width: 92px;
  min-height: 38px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #edf3fb;
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 900;
}

.timer-button.running {
  background: #fff0b8;
  color: #8b6300;
}

.deadline-badge.overdue {
  background: #ffd9d9;
  color: #a32626;
}

.empty-message {
  display: none;
  margin: 20px 0 0;
  padding: 22px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.68);
  color: var(--muted);
  text-align: center;
}

.empty-message.visible {
  display: block;
}

.calendar-section {
  margin-top: 18px;
}

.calendar-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.calendar-heading h2 {
  margin-bottom: 0;
}

.calendar-controls {
  display: grid;
  grid-template-columns: 40px minmax(96px, auto) 40px;
  align-items: center;
  gap: 6px;
}

.calendar-controls button {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #edf3fb;
  color: var(--accent-dark);
  font-size: 1.3rem;
  font-weight: 900;
}

.calendar-controls strong {
  color: var(--text);
  font-size: 0.95rem;
  text-align: center;
}

.calendar-weekdays,
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 6px;
}

.calendar-weekdays {
  margin-bottom: 6px;
}

.calendar-weekdays span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-align: center;
}

.calendar-day {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  min-height: 76px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfdff;
}

.calendar-day[data-date] {
  cursor: pointer;
}

.calendar-day[data-date]:focus {
  border-color: var(--accent);
  outline: 3px solid rgba(47, 125, 246, 0.16);
}

.calendar-day.muted {
  background: rgba(251, 253, 255, 0.44);
}

.calendar-day.today {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px rgba(47, 125, 246, 0.2);
}

.calendar-day.has-task {
  background: #ffffff;
}

.calendar-date-number {
  color: var(--text);
  font-size: 0.86rem;
  font-weight: 900;
}

.calendar-task-dots {
  display: flex;
  flex-wrap: wrap;
  align-content: start;
  gap: 4px;
  margin-top: 7px;
}

.calendar-task-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.calendar-task-dot.completed {
  border: 1px solid currentColor;
  background: transparent !important;
}

.calendar-task-titles {
  display: grid;
  gap: 2px;
  min-width: 0;
  margin-top: 4px;
}

.calendar-task-title-chip {
  overflow: hidden;
  color: var(--text);
  font-size: 0.68rem;
  font-weight: 800;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.calendar-task-title-chip.completed {
  color: var(--muted);
  text-decoration: line-through;
}

.calendar-task-more {
  color: var(--accent-dark);
  font-size: 0.68rem;
  font-weight: 900;
  line-height: 1.25;
}

.calendar-task-count {
  justify-self: end;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
}

.calendar-task-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.calendar-task-item {
  padding: 12px;
  border: 1px solid var(--line);
  border-left: 6px solid var(--priority-color);
  border-radius: 12px;
  background: #fbfdff;
  cursor: pointer;
}

.calendar-task-item:hover {
  background: rgba(47, 125, 246, 0.06);
}

.calendar-task-item:focus {
  border-color: var(--accent);
  outline: 3px solid rgba(47, 125, 246, 0.16);
  outline-offset: 3px;
}

.calendar-task-item.completed {
  opacity: 0.72;
}

.calendar-task-item.completed .calendar-task-title {
  color: var(--muted);
  text-decoration: line-through;
}

.calendar-task-title {
  display: block;
  overflow-wrap: anywhere;
}

.calendar-task-memo {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.calendar-task-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 9px;
}

.calendar-task-empty {
  display: none;
  margin: 0;
  padding: 18px;
  border: 1px dashed var(--line);
  border-radius: 12px;
  color: var(--muted);
  text-align: center;
}

.calendar-task-empty.visible {
  display: block;
}

.edit-task-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.edit-task-form .field:first-child,
.edit-task-form .field:nth-child(2) {
  grid-column: 1 / -1;
}

.memo-edit-input {
  width: 100%;
  min-height: 140px;
  padding: 12px 13px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfdff;
  color: var(--text);
  resize: vertical;
}

.memo-edit-input:focus {
  border-color: var(--accent);
  outline: 3px solid rgba(47, 125, 246, 0.16);
}

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

.subtask-edit-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 36px 36px auto;
  gap: 8px;
  align-items: center;
  min-height: 38px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfdff;
  font-weight: 800;
}

.subtask-title-input {
  min-width: 0;
  min-height: 34px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #ffffff;
  color: var(--text);
}

.subtask-move-button,
.subtask-delete-button {
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #edf3fb;
  color: var(--accent-dark);
  font-weight: 900;
}

.subtask-delete-button {
  padding: 0 10px;
  background: #f7eaea;
  color: var(--danger);
}

.subtask-move-button:disabled {
  color: var(--muted);
  cursor: not-allowed;
  opacity: 0.55;
}

.subtask-empty {
  margin: 0;
  padding: 10px;
  border: 1px dashed var(--line);
  border-radius: 12px;
  color: var(--muted);
}

.memo-save-button {
  width: 100%;
  min-height: 46px;
  margin-top: 12px;
  border: 0;
  border-radius: 12px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 800;
}

.save-status-toast {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 30;
  max-width: min(360px, calc(100vw - 32px));
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #eaf7f1;
  color: #167255;
  box-shadow: var(--shadow);
  font-size: 0.86rem;
  font-weight: 900;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.save-status-toast.visible {
  opacity: 1;
  transform: translateY(0);
}

.save-status-toast.error {
  background: #fff2f2;
  color: var(--danger);
}

@media (max-width: 520px) {
  .app-shell {
    padding: 18px 12px 28px;
  }

  .app-header {
    grid-template-columns: 1fr;
  }

  .sync-panel {
    width: 100%;
  }

  .mode-account-panels {
    grid-template-columns: 1fr;
  }

  .personal-panel {
    width: 100%;
  }

  .sync-account-panel {
    width: 100%;
  }

  .summary-grid {
    gap: 8px;
  }

  .summary-card {
    padding: 12px 10px;
  }

  .summary-card strong {
    font-size: 1.35rem;
  }

  .group-heading,
  .group-input-row {
    grid-template-columns: 1fr;
  }

  .group-progress-top,
  .group-stats {
    align-items: flex-start;
    flex-direction: column;
  }

  .panel {
    padding: 16px;
  }

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

  .sync-form {
    grid-template-columns: 1fr;
  }

  .sync-actions {
    grid-template-columns: 1fr;
  }

  .filter-tabs {
    grid-template-columns: 1fr;
  }

  .task-tools-panel {
    grid-template-columns: 1fr;
  }

  .task-card {
    grid-template-columns: auto 1fr;
  }

  .timer-button {
    grid-column: 2;
    justify-self: start;
  }

  .calendar-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .calendar-controls {
    grid-template-columns: 40px 1fr 40px;
  }

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

  .subtask-edit-item {
    grid-template-columns: auto minmax(0, 1fr) 34px 34px;
  }

  .subtask-delete-button {
    grid-column: 2 / -1;
  }

  .editable-option-item {
    grid-template-columns: minmax(0, 1fr) 48px 38px 38px;
  }

  .editable-option-item .option-delete-button {
    grid-column: 1 / -1;
  }

  .calendar-day {
    min-height: 62px;
    padding: 6px;
  }

  .delete-button {
    grid-column: 2;
    justify-self: end;
    width: 52px;
    border-radius: 14px;
  }
}