:root {
  color-scheme: light;
  --bg: #f4f5f2;
  --surface: #ffffff;
  --surface-subtle: #f8f9f7;
  --text: #17201c;
  --text-soft: #5d6862;
  --border: #d8ded9;
  --border-strong: #bcc7c0;
  --primary: #245f46;
  --primary-hover: #194a35;
  --primary-soft: #e8f2ec;
  --danger: #a63737;
  --danger-soft: #fbebeb;
  --shadow: 0 10px 30px rgba(25, 44, 34, 0.08);
  --focus: #1769aa;
  --q1: #a83f3f;
  --q1-soft: #fbefee;
  --q2: #27634a;
  --q2-soft: #ebf4ef;
  --q3: #9a6515;
  --q3-soft: #fbf3e4;
  --q4: #58616b;
  --q4-soft: #f0f2f4;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #111614;
  --surface: #1a211e;
  --surface-subtle: #202824;
  --text: #edf2ef;
  --text-soft: #aebbb4;
  --border: #37433d;
  --border-strong: #526159;
  --primary: #7dc29f;
  --primary-hover: #9ed4b8;
  --primary-soft: #1f392d;
  --danger: #f09a9a;
  --danger-soft: #3b2424;
  --shadow: 0 12px 36px rgba(0, 0, 0, 0.25);
  --focus: #70bdf1;
  --q1: #ef9292;
  --q1-soft: #332323;
  --q2: #82c8a5;
  --q2-soft: #1e3027;
  --q3: #e6b668;
  --q3-soft: #352c1d;
  --q4: #b5bec8;
  --q4-soft: #282d32;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Yu Gothic UI", "Hiragino Kaku Gothic ProN", Meiryo, system-ui, sans-serif;
  line-height: 1.55;
}

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

button,
select,
summary {
  cursor: pointer;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--focus) 35%, transparent);
  outline-offset: 2px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--text);
  color: var(--surface);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

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

.app-header,
.app-shell {
  width: min(1500px, calc(100% - 40px));
  margin-inline: auto;
}

.app-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 34px 0 20px;
}

.eyebrow {
  margin: 0 0 5px;
  color: var(--primary);
  font-size: 0.73rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 5px;
  font-size: clamp(1.75rem, 4vw, 2.65rem);
  line-height: 1.2;
  letter-spacing: -0.035em;
}

.lead {
  margin: 0;
  color: var(--text-soft);
}

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

.button,
.icon-button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-weight: 700;
  transition: background-color 120ms ease, border-color 120ms ease, transform 120ms ease;
}

.button {
  padding: 9px 15px;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  border-color: var(--primary);
  background: var(--primary);
  color: var(--surface);
}

html[data-theme="dark"] .button-primary {
  color: #102019;
}

.button-primary:hover {
  border-color: var(--primary-hover);
  background: var(--primary-hover);
}

.button-secondary {
  border-color: var(--border-strong);
  background: var(--surface);
}

.button-secondary:hover,
.button-quiet:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.button-quiet {
  border-color: transparent;
  background: transparent;
}

.button-danger {
  border-color: var(--danger);
  background: var(--danger);
  color: #fff;
}

.app-shell {
  padding-bottom: 42px;
}

.quick-add-panel,
.overview,
.completed-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.quick-add-panel {
  padding: clamp(18px, 3vw, 28px);
}

.quick-add-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 15px;
}

.quick-add-heading h2 {
  margin-bottom: 2px;
  font-size: 1.2rem;
}

.quick-add-heading p {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.92rem;
}

.local-badge {
  flex: 0 0 auto;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 700;
}

.quick-add-row {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(210px, auto) auto;
  gap: 10px;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--border-strong);
  border-radius: 9px;
  background: var(--surface);
}

input,
select {
  min-height: 44px;
  padding: 8px 11px;
}

textarea {
  min-height: 80px;
  padding: 10px 11px;
  resize: vertical;
}

input::placeholder,
textarea::placeholder {
  color: var(--text-soft);
  opacity: 0.75;
}

#quick-title {
  min-height: 50px;
  padding-inline: 16px;
  font-size: 1.05rem;
}

.quick-details {
  margin-top: 11px;
}

.quick-details > summary {
  width: fit-content;
  padding: 5px 2px;
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: 700;
}

.detail-fields,
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.detail-fields {
  margin-top: 10px;
  padding: 16px;
  border-radius: var(--radius-md);
  background: var(--surface-subtle);
}

.field {
  min-width: 0;
}

.field label,
.filter-field label {
  display: block;
  margin-bottom: 5px;
  font-size: 0.82rem;
  font-weight: 800;
}

.field label span {
  color: var(--text-soft);
  font-weight: 500;
}

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

.overview {
  display: flex;
  align-items: flex-end;
  gap: 24px;
  margin: 18px 0;
  padding: 16px 18px;
  box-shadow: none;
}

.stats {
  display: flex;
  flex: 0 0 auto;
  gap: 8px;
}

.stat {
  display: grid;
  min-width: 76px;
  padding: 7px 10px;
  border-radius: 10px;
  background: var(--surface-subtle);
  text-align: center;
}

.stat span {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.25;
}

.stat small {
  color: var(--text-soft);
  font-size: 0.7rem;
}

.stat-accent {
  background: var(--q1-soft);
}

.stat-accent span {
  color: var(--q1);
}

.filters {
  display: grid;
  width: 100%;
  grid-template-columns: minmax(190px, 1.4fr) minmax(150px, 1fr) auto auto;
  align-items: end;
  gap: 10px;
}

.filter-field input {
  min-height: 40px;
}

.checkbox-filter {
  display: flex;
  min-height: 40px;
  align-items: center;
  gap: 7px;
  padding: 0 5px;
  white-space: nowrap;
  font-size: 0.84rem;
  font-weight: 700;
}

.checkbox-filter input {
  width: 17px;
  min-height: auto;
  height: 17px;
}

.filter-reset {
  min-height: 40px;
  white-space: nowrap;
  font-size: 0.82rem;
}

.filter-result {
  display: none;
  margin: 0 0 2px;
  color: var(--text-soft);
  font-size: 0.8rem;
}

.matrix {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.quadrant {
  position: relative;
  min-height: 310px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-top: 4px solid var(--quadrant-color);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.quadrant-1 { --quadrant-color: var(--q1); --quadrant-soft: var(--q1-soft); }
.quadrant-2 { --quadrant-color: var(--q2); --quadrant-soft: var(--q2-soft); }
.quadrant-3 { --quadrant-color: var(--q3); --quadrant-soft: var(--q3-soft); }
.quadrant-4 { --quadrant-color: var(--q4); --quadrant-soft: var(--q4-soft); }

.quadrant.is-drag-over {
  border-color: var(--quadrant-color);
  box-shadow: inset 0 0 0 2px var(--quadrant-color);
}

.quadrant-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 17px 13px;
  border-bottom: 1px solid var(--border);
  background: var(--quadrant-soft);
}

.quadrant-heading {
  display: flex;
  min-width: 0;
  gap: 10px;
}

.quadrant-number {
  color: var(--quadrant-color);
  font-size: 1.4rem;
  font-weight: 800;
  line-height: 1.2;
}

.quadrant-heading h2 {
  margin-bottom: 1px;
  font-size: clamp(0.96rem, 2vw, 1.1rem);
}

.quadrant-heading p {
  margin: 0;
  color: var(--quadrant-color);
  font-size: 0.78rem;
  font-weight: 800;
}

.count {
  display: inline-flex;
  min-width: 24px;
  height: 24px;
  align-items: center;
  justify-content: center;
  margin-left: 3px;
  padding: 0 6px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--quadrant-color) 12%, var(--surface));
  color: var(--quadrant-color);
  font-size: 0.75rem;
}

.sort-control {
  flex: 0 0 auto;
  color: var(--text-soft);
  font-size: 0.68rem;
  font-weight: 700;
}

.sort-control select {
  display: block;
  width: auto;
  min-height: 31px;
  margin-top: 3px;
  padding: 3px 27px 3px 7px;
  font-size: 0.75rem;
}

.task-list {
  display: grid;
  align-content: start;
  gap: 9px;
  min-height: 215px;
  padding: 12px;
}

.task-card {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--quadrant-color);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: 0 3px 12px rgba(21, 37, 29, 0.05);
}

.task-card:hover {
  border-color: var(--border-strong);
}

.task-card.is-dragging {
  opacity: 0.38;
}

.task-card.is-overdue {
  background: color-mix(in srgb, var(--danger-soft) 45%, var(--surface));
}

.drag-handle {
  align-self: start;
  padding: 4px 1px;
  border: 0;
  background: transparent;
  color: var(--text-soft);
  cursor: grab;
  font-size: 1rem;
  letter-spacing: -4px;
}

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

.task-title {
  margin: 0;
  overflow-wrap: anywhere;
  font-size: 0.95rem;
  font-weight: 800;
  line-height: 1.42;
}

.task-meta,
.task-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 7px;
}

.due-badge,
.tag-chip,
.quadrant-chip {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  font-size: 0.7rem;
}

.due-badge,
.tag-chip {
  padding: 3px 7px;
  background: var(--surface-subtle);
  color: var(--text-soft);
}

.due-badge.is-today,
.due-badge.is-tomorrow {
  background: var(--q3-soft);
  color: var(--q3);
  font-weight: 800;
}

.due-badge.is-overdue {
  background: var(--danger-soft);
  color: var(--danger);
  font-weight: 800;
}

.task-description-preview {
  display: -webkit-box;
  overflow: hidden;
  margin: 7px 0 0;
  color: var(--text-soft);
  font-size: 0.76rem;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.task-actions {
  display: flex;
  align-self: start;
  gap: 3px;
}

.icon-button {
  width: 34px;
  min-height: 34px;
  padding: 0;
  border-color: transparent;
  background: transparent;
  font-size: 1rem;
}

.icon-button:hover {
  border-color: var(--border);
  background: var(--surface-subtle);
}

.complete-button {
  color: var(--primary);
}

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

.mobile-move {
  grid-column: 2 / -1;
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--text-soft);
  font-size: 0.7rem;
}

.mobile-move select {
  min-height: 32px;
  padding-block: 3px;
  font-size: 0.73rem;
}

.empty-state {
  margin: 0;
  padding: 12px;
  color: var(--text-soft);
  font-size: 0.8rem;
  text-align: center;
}

.quadrant > .empty-state {
  display: none;
  margin: -175px 20px 0;
  padding: 24px 12px;
  border: 1px dashed var(--border-strong);
  border-radius: 10px;
}

.quadrant > .empty-state.is-visible {
  display: block;
}

.completed-panel {
  margin-top: 18px;
  padding: 3px 18px;
  box-shadow: none;
}

.completed-panel summary {
  padding: 14px 2px;
  font-weight: 800;
}

.completed-list {
  display: grid;
  gap: 7px;
  padding-bottom: 14px;
}

.completed-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 10px 12px;
  border-radius: 9px;
  background: var(--surface-subtle);
}

.completed-item h3 {
  margin: 0 0 3px;
  font-size: 0.88rem;
}

.completed-item p {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.72rem;
}

.completed-actions {
  display: flex;
  gap: 5px;
}

.completed-actions .button {
  min-height: 34px;
  padding: 5px 9px;
  font-size: 0.76rem;
}

.storage-note {
  max-width: 920px;
  margin: 17px auto 0;
  color: var(--text-soft);
  font-size: 0.76rem;
  text-align: center;
}

.modal {
  width: min(680px, calc(100% - 28px));
  max-height: min(88vh, 820px);
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.24);
}

.modal::backdrop {
  background: rgba(12, 19, 15, 0.55);
  backdrop-filter: blur(2px);
}

.modal-card {
  display: flex;
  max-height: min(88vh, 820px);
  flex-direction: column;
  margin: 0;
}

.modal-header,
.modal-footer {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  padding: 17px 20px;
}

.modal-header {
  border-bottom: 1px solid var(--border);
}

.modal-header h2 {
  margin: 0;
  font-size: 1.25rem;
}

.modal-header .eyebrow {
  margin-bottom: 1px;
}

.modal-header .icon-button {
  font-size: 1.35rem;
}

.modal-body {
  overflow-y: auto;
  padding: 20px;
}

.modal-footer {
  justify-content: flex-end;
  border-top: 1px solid var(--border);
  background: var(--surface-subtle);
}

.field-error {
  min-height: 1em;
  margin: 4px 0 0;
  color: var(--danger);
  font-size: 0.75rem;
}

.task-timestamps {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 0;
  padding: 11px 12px;
  border-radius: 9px;
  background: var(--surface-subtle);
  color: var(--text-soft);
  font-size: 0.75rem;
}

.task-timestamps div {
  display: flex;
  gap: 7px;
}

.task-timestamps dt {
  font-weight: 800;
}

.task-timestamps dd {
  margin: 0;
}

.data-card {
  max-width: 680px;
}

.data-section + .data-section {
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.data-section h3 {
  margin-bottom: 3px;
  font-size: 1rem;
}

.data-section p {
  margin-bottom: 12px;
  color: var(--text-soft);
  font-size: 0.82rem;
}

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

.data-actions-stack .button {
  flex: 1 1 180px;
}

.import-mode {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 14px;
  padding: 11px 13px;
  border: 1px solid var(--border);
  border-radius: 9px;
}

.import-mode legend {
  padding-inline: 4px;
  font-size: 0.76rem;
  font-weight: 800;
}

.import-mode label {
  font-size: 0.8rem;
}

.import-mode input {
  width: auto;
  min-height: auto;
}

.danger-zone h3 {
  color: var(--danger);
}

.toast {
  position: fixed;
  z-index: 200;
  right: 20px;
  bottom: 20px;
  max-width: min(420px, calc(100% - 40px));
  padding: 11px 15px;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  background: var(--text);
  color: var(--surface);
  box-shadow: var(--shadow);
  font-size: 0.85rem;
  font-weight: 700;
  opacity: 0;
  pointer-events: none;
  transform: translateY(14px);
  transition: opacity 160ms ease, transform 160ms ease;
}

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

.toast.is-error {
  border-color: var(--danger);
  background: var(--danger);
  color: #fff;
}

@media (min-width: 901px) {
  .mobile-move {
    display: none;
  }
}

@media (max-width: 1100px) {
  .overview {
    align-items: stretch;
    flex-direction: column;
    gap: 14px;
  }
}

@media (max-width: 800px) {
  .app-header,
  .app-shell {
    width: min(100% - 24px, 700px);
  }

  .app-header {
    padding-top: 22px;
  }

  .matrix {
    grid-template-columns: 1fr;
  }

  .quadrant {
    min-height: 260px;
  }

  .task-list {
    min-height: 165px;
  }

  .quadrant > .empty-state {
    margin-top: -135px;
  }

  .filters {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 580px) {
  .app-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  .header-actions {
    width: 100%;
  }

  .header-actions .button {
    flex: 1;
  }

  .quick-add-heading {
    flex-direction: column;
  }

  .quick-add-row {
    grid-template-columns: 1fr;
  }

  #quick-title {
    font-size: 1rem;
  }

  .detail-fields,
  .form-grid,
  .filters {
    grid-template-columns: 1fr;
  }

  .field-wide,
  .field-full {
    grid-column: auto;
  }

  .stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
  }

  .stat {
    min-width: 0;
  }

  .quadrant-header {
    align-items: stretch;
    flex-direction: column;
  }

  .sort-control {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 7px;
  }

  .sort-control select {
    margin-top: 0;
  }

  .task-card {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .drag-handle {
    display: none;
  }

  .mobile-move {
    grid-column: 1 / -1;
  }

  .completed-item {
    grid-template-columns: 1fr;
  }

  .completed-actions .button {
    flex: 1;
  }

  .modal-header,
  .modal-footer,
  .modal-body {
    padding-inline: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}