:root {
  --page-bg: linear-gradient(135deg, #f4efe6 0%, #e7eef8 100%);
  --card-bg: rgba(255, 255, 255, 0.92);
  --text-main: #162033;
  --text-soft: #53627a;
  --border: rgba(22, 32, 51, 0.12);
  --shadow: 0 24px 60px rgba(37, 55, 84, 0.18);
  --priority-high-bg: #ffe3db;
  --priority-high-text: #8c2f10;
  --priority-high-accent: #dc2626;
  --priority-medium-bg: #fff3cd;
  --priority-medium-text: #7a5800;
  --priority-medium-accent: #f59e0b;
  --priority-low-bg: #d1fae5;
  --priority-low-text: #065f46;
  --priority-low-accent: #22c55e;
  --status-pending-bg: #e0e7ff;
  --status-pending-text: #3730a3;
  --status-progress-bg: #fff1bf;
  --status-progress-text: #7a5800;
  --status-done-bg: #dff2eb;
  --status-done-text: #13553c;
  --overdue-bg: #fde8e8;
  --overdue-text: #991b1b;
  --tag-bg: #edf2ff;
  --tag-text: #294b8f;
  --button-bg: #1d4ed8;
  --button-bg-hover: #1e40af;
  --button-danger: #a61b1b;
  --button-danger-hover: #7f1717;
  --focus: #0f766e;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "ABeeZee", sans-serif;
  font-weight: 400;
  font-style: normal;
  color: var(--text-main);
  background: var(--page-bg);
}

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

.page-container {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem 1rem;
}

.todo-card {
  position: relative;
  display: flex;
  flex-direction: column;
  width: min(100%, 42rem);
  padding: 1.75rem;
  padding-left: calc(1.75rem + 6px);
  border: 1px solid var(--border);
  border-radius: 1.5rem;
  background: var(--card-bg);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  overflow: hidden;
}

.priority-indicator {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  border-radius: 1.5rem 0 0 1.5rem;
  transition: background-color 250ms ease;
}

.priority-indicator.priority-high {
  background: var(--priority-high-accent);
}

.priority-indicator.priority-medium {
  background: var(--priority-medium-accent);
}

.priority-indicator.priority-low {
  background: var(--priority-low-accent);
}

.card-header,
.section-title-row,
.toggle-row,
.status-control-row,
.action-row {
  display: flex;
  align-items: center;
}

.card-header,
.action-row {
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1rem;
}

h1,
h2,
h3,
p,
dl {
  margin: 0;
}

h1 {
  font-size: clamp(1.65rem, 4vw, 2.2rem);
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.priority-high {
  background: var(--priority-high-bg);
  color: var(--priority-high-text);
}

.priority-medium {
  background: var(--priority-medium-bg);
  color: var(--priority-medium-text);
}

.priority-low {
  background: var(--priority-low-bg);
  color: var(--priority-low-text);
}

.status-pending {
  background: var(--status-pending-bg);
  color: var(--status-pending-text);
}

.status-in-progress {
  background: var(--status-progress-bg);
  color: var(--status-progress-text);
}

.status-done {
  background: var(--status-done-bg);
  color: var(--status-done-text);
}

.task-block {
  margin-top: 1.5rem;
}

.task-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.task-header-row h2 {
  font-size: 1.4rem;
}

.task-block p {
  color: var(--text-soft);
  line-height: 1.6;
  margin-top: 0.65rem;
}

.expand-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  width: 2rem;
  height: 2rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background-color 160ms ease;
}

.expand-toggle:hover {
  background: #f1f5f9;
}

.expand-toggle::after {
  content: "";
  border: solid var(--text-soft);
  border-width: 0 2px 2px 0;
  display: inline-block;
  padding: 4px;
  transform: rotate(45deg);
  transition: transform 200ms ease;
  margin-top: -4px;
}

.expand-toggle[aria-expanded="true"]::after {
  transform: rotate(-135deg);
  margin-top: 4px;
}

.collapsible-section {
  overflow: hidden;
  max-height: 500px;
  opacity: 1;
  transition:
    max-height 300ms ease,
    opacity 300ms ease;
}

.collapsible-section.is-collapsed {
  max-height: 0;
  opacity: 0;
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
  margin-top: 1.5rem;
}

.meta-item {
  padding: 1rem;
  border-radius: 1rem;
  background: #f8fafc;
  border: 1px solid rgba(22, 32, 51, 0.08);
  transition:
    border-color 250ms ease,
    background-color 250ms ease;
}

.meta-item dt {
  margin-bottom: 0.45rem;
  color: var(--text-soft);
  font-size: 0.85rem;
  font-weight: 700;
}

.meta-item dd {
  font-weight: 600;
}

.overdue-badge {
  background: var(--overdue-bg);
  color: var(--overdue-text);
  font-size: 0.78rem;
  margin-left: 0.4rem;
  padding: 0.3rem 0.6rem;
}

.overdue-badge[hidden] {
  display: none;
}

.todo-card.is-overdue .meta-item:nth-child(2) {
  border-color: var(--overdue-text);
  background: var(--overdue-bg);
}

.todo-card.is-overdue .meta-item:nth-child(2) dd {
  color: var(--overdue-text);
}

.toggle-row,
.status-control-row {
  gap: 0.75rem;
  margin-top: 1rem;
}

.toggle-input {
  width: 1.1rem;
  height: 1.1rem;
  accent-color: var(--button-bg);
}

.toggle-label {
  font-weight: 600;
}

.status-select {
  padding: 0.5rem 0.75rem;
  border-radius: 0.6rem;
  border: 1px solid var(--border);
  font-weight: 600;
  font-size: 0.9rem;
  background: #f8fafc;
  cursor: pointer;
  color: var(--text-main);
}

.section-title-row {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.section-title-row h3 {
  font-size: 1rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tag-chip {
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: var(--tag-bg);
  color: var(--tag-text);
  font-size: 0.92rem;
  font-weight: 700;
  overflow-wrap: break-word;
  word-break: break-word;
}

.action-row {
  margin-top: 1.75rem;
}

.action-button {
  min-width: 7rem;
  padding: 0.85rem 1rem;
  border: 0;
  border-radius: 0.9rem;
  color: #ffffff;
  background: var(--button-bg);
  font-weight: 700;
  cursor: pointer;
  transition:
    transform 160ms ease,
    background-color 160ms ease;
}

.action-button:hover {
  background: var(--button-bg-hover);
  transform: translateY(-1px);
}

.action-button.danger {
  background: var(--button-danger);
}

.action-button.danger:hover {
  background: var(--button-danger-hover);
}

.action-button.secondary {
  background: #334155;
}

.action-button.secondary:hover {
  background: #1f2937;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.todo-card.is-complete .task-block h2,
.todo-card.is-complete .task-block p {
  opacity: 0.72;
}

.todo-card.is-complete .task-block h2 {
  text-decoration: line-through;
}

.todo-card.is-complete .meta-item:nth-child(2) dd {
  color: var(--status-done-text);
}

.todo-card.is-editing .task-block,
.todo-card.is-editing .meta-grid,
.todo-card.is-editing .toggle-row,
.todo-card.is-editing .status-control-row,
.todo-card.is-editing [aria-labelledby="tags-heading"],
.todo-card.is-editing .action-row {
  display: none;
}

.edit-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.5rem;
}

.edit-form label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-soft);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.edit-form label > span {
  display: block;
}

.edit-form input,
.edit-form textarea,
.edit-form select {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 0.7rem;
  font-size: 1rem;
  font-family: inherit;
  background: #f8fafc;
  color: var(--text-main);
}

.edit-form textarea {
  min-height: 5rem;
  resize: vertical;
}

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

@media (max-width: 640px) {
  .todo-card {
    padding: 1.25rem;
    padding-left: calc(1.25rem + 6px);
  }

  .card-header,
  .action-row,
  .edit-actions {
    flex-direction: column;
    align-items: flex-start;
  }

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

  .action-button {
    width: 100%;
  }

  .edit-actions .action-button {
    width: 100%;
  }
}