:root {
  color-scheme: light;
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #1f2a37;
  --muted: #6b7280;
  --accent: #3b82f6;
  --border: #e5e7eb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang TC", "Noto Sans TC", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding: 24px 40px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}

.title h1 {
  margin: 0;
  font-size: 28px;
}

.subtitle {
  margin: 4px 0 0;
  color: var(--muted);
}

.actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.actions input {
  padding: 10px 14px;
  min-width: 220px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
}

button {
  border: none;
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 14px;
  cursor: pointer;
}

button.primary {
  background: var(--accent);
  color: white;
}

button.ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

button.danger {
  background: #ef4444;
  color: white;
}

main {
  padding: 24px 40px 48px;
}

.meta {
  display: flex;
  gap: 24px;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 14px;
  flex-wrap: wrap;
}

.sync-status {
  color: #16a34a;
  font-weight: 600;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.sync-status.show {
  opacity: 1;
}

.filters {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.add-panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 20px;
}

.add-panel h2 {
  margin: 0 0 12px;
  font-size: 18px;
}

.add-form {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr auto;
  gap: 12px;
}

.add-form input {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
}

@media (max-width: 720px) {
  .add-form {
    grid-template-columns: 1fr;
  }
}

.filters select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: white;
}

.memo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 150px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  position: relative;
}

.card.completed {
  opacity: 0.7;
}

.card.completed .content {
  text-decoration: line-through;
}

.card-head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  font-size: 12px;
  color: var(--muted);
  gap: 8px;
}

.badge {
  background: rgba(59, 130, 246, 0.12);
  color: var(--accent);
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 600;
}

.content {
  font-size: 15px;
  line-height: 1.5;
  margin: 0;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.meta-row span {
  background: #f3f4f6;
  color: #374151;
  padding: 2px 8px;
  border-radius: 8px;
  font-size: 12px;
}

.card-actions {
  display: flex;
  gap: 8px;
  margin-top: auto;
}

.check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.check input {
  position: absolute;
  opacity: 0;
}

.check-mark {
  width: 18px;
  height: 18px;
  border-radius: 6px;
  border: 2px solid var(--border);
  display: inline-block;
  position: relative;
}

.check input:checked + .check-mark {
  background: var(--accent);
  border-color: var(--accent);
}

.check input:checked + .check-mark::after {
  content: "";
  position: absolute;
  width: 5px;
  height: 9px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
  left: 5px;
  top: 1px;
}

dialog::backdrop {
  background: rgba(15, 23, 42, 0.45);
}

dialog {
  border: none;
  border-radius: 16px;
  padding: 0;
  width: min(520px, 90vw);
}

.modal {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 24px;
}

.modal label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
}

.modal textarea,
.modal input {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.tag-editor {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
  color: #667085;
}

.tag-editor input {
  background: #fff;
  border: 1px solid #d0d5dd;
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 0.95rem;
}