:root {
  --text-main: #1f2937;
  --text-muted: #6b7280;
  --bg-card: #ffffff;
  --bg-page: #f3f4f6;
  --border-color: #e5e7eb;
  --primary: #2563eb;
  --danger: #ef4444;
  --success: #10b981;
  --warning: #f59e0b;
  --radius: 8px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.todo-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px 20px 20px 24px;
  width: 100%;
  max-width: 500px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  overflow: hidden;
}

.priority-accent {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background-color: var(--border-color);
  transition: background-color 0.3s ease;
}

.todo-card[data-priority="High"] .priority-accent {
  background-color: var(--danger);
}
.todo-card[data-priority="Medium"] .priority-accent {
  background-color: var(--warning);
}
.todo-card[data-priority="Low"] .priority-accent {
  background-color: var(--success);
}

.todo-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 8px;
}
.todo-title {
  font-size: 1.25rem;
  line-height: 1.4;
  transition: all 0.3s;
  word-break: break-word;
}
.todo-description {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.todo-description.collapsed {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.btn-text {
  background: none;
  border: none;
  color: var(--primary);
  font-size: 0.85rem;
  cursor: pointer;
  padding: 4px 0;
  font-weight: 500;
}
.btn-text:hover {
  text-decoration: underline;
}

.badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 9999px;
  white-space: nowrap;
}
.todo-card[data-priority="High"] .priority-badge {
  background: #fee2e2;
  color: #991b1b;
}
.todo-card[data-priority="Medium"] .priority-badge {
  background: #fef3c7;
  color: #92400e;
}
.todo-card[data-priority="Low"] .priority-badge {
  background: #d1fae5;
  color: #065f46;
}

.todo-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 12px 0;
  border-top: 1px dashed var(--border-color);
  border-bottom: 1px dashed var(--border-color);
  margin: 12px 0;
}
.time-block {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.due-date {
  font-weight: 500;
  font-size: 0.85rem;
}
.time-status-wrapper {
  display: flex;
  align-items: center;
  gap: 6px;
}
.time-remaining {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}
.overdue-badge {
  font-size: 0.7rem;
  background: var(--danger);
  color: white;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: bold;
}

.status-control-wrapper {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}
.status-select {
  font-size: 0.85rem;
  padding: 4px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: var(--bg-card);
  cursor: pointer;
}
.status-display {
  display: none;
}

.todo-card.is-overdue .time-remaining {
  color: var(--danger);
}
.todo-card.is-completed .todo-title {
  text-decoration: line-through;
  color: var(--text-muted);
}
.todo-card.is-completed .time-remaining {
  color: var(--success);
}
.todo-card.is-in-progress {
  background-color: #f8fafc;
  border-color: #bae6fd;
}

.todo-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}
.tag {
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 4px;
}
.todo-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.checkbox-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
}
.actions {
  display: flex;
  gap: 8px;
}
.btn {
  background: transparent;
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}
.btn:hover {
  background-color: var(--bg-page);
}

.hidden {
  display: none !important;
}
.edit-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
}
.form-input {
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 0.95rem;
  font-family: inherit;
}
.form-input:focus {
  outline: 2px solid var(--primary);
  outline-offset: -1px;
}
.form-row {
  display: flex;
  gap: 12px;
}
.form-row .form-group {
  flex: 1;
}
.edit-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 8px;
}
.btn-save {
  background-color: var(--primary);
  color: white;
  border-color: var(--primary);
}
.btn-save:hover {
  background-color: #1d4ed8;
}

*:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

@media (max-width: 400px) {
  .form-row {
    flex-direction: column;
  }
}