:root {
  --bg: #f4f7f8;
  --panel: #ffffff;
  --panel-soft: #f8fafb;
  --line: #dfe8ed;
  --ink: #16304a;
  --muted: #62758a;
  --accent: #1d7a8c;
  --accent-strong: #0d5867;
  --accent-soft: rgba(29, 122, 140, 0.1);
  --amber: #ffb347;
  --red: #d54b4b;
  --green: #2d9f76;
  --shadow: rgba(22, 48, 74, 0.08);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: "Noto Sans TC", "Microsoft JhengHei", sans-serif;
}

body {
  padding: 32px 20px 48px;
}

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

button {
  cursor: pointer;
}

.todo-shell {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.todo-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.8px;
}

h1 {
  margin: 8px 0 0;
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 1.08;
}

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

.secondary-link,
.ghost-button,
.nav-button,
.primary-button,
.secondary-button,
.task-item {
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.secondary-link,
.ghost-button,
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 16px;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
}

.secondary-link,
.ghost-button {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
}

.secondary-link:hover,
.ghost-button:hover,
.nav-button:hover,
.primary-button:hover,
.secondary-button:hover,
.task-item:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(22, 48, 74, 0.06);
}

.calendar-shell {
  position: relative;
  display: grid;
  gap: 16px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  box-shadow: 0 18px 28px var(--shadow);
}

.calendar-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.month-label {
  font-size: clamp(1.15rem, 2vw, 1.7rem);
  font-weight: 800;
  letter-spacing: 0.04em;
}

.nav-button {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--panel-soft);
  color: var(--ink);
  font-size: 1.7rem;
  line-height: 1;
}

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

.calendar-grid-wrap {
  position: relative;
  display: grid;
  gap: 0;
}

.calendar-event-layer {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  grid-auto-rows: 120px;
  --event-lane-offset: 38px;
  --event-lane-gap: 20px;
  gap: 0;
  pointer-events: none;
  z-index: 2;
}

.calendar-weekdays {
  padding-bottom: 6px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-align: center;
}

.calendar-grid {
  min-height: 470px;
}

.day-cell {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 120px;
  padding: 12px 10px 10px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: #fbfcfd;
  overflow: hidden;
}

.event-range {
  display: flex;
  align-items: center;
  align-self: start;
  height: 20px;
  min-width: 0;
  padding: 6px 10px;
  border: 1px solid rgba(29, 122, 140, 0.18);
  border-radius: 0;
  background: linear-gradient(135deg, rgba(29, 122, 140, 0.12), rgba(13, 88, 103, 0.18));
  color: var(--accent-strong);
  font-size: 0.72rem;
  font-weight: 800;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  box-shadow: 0 4px 12px rgba(22, 48, 74, 0.05);
}

.event-range.pending { background: rgba(255, 179, 71, 0.18); color: #8a5a00; }
.event-range.done { background: rgba(45, 159, 118, 0.16); color: #176846; }
.event-range.urgent { background: rgba(213, 75, 75, 0.16); color: #9f3030; }
.event-range.default { background: rgba(29, 122, 140, 0.16); color: var(--accent-strong); }
.event-range.event-overflow { background: #e9eef2; color: var(--muted); }

.event-range.category-colored, .task-pill.category-colored {
  border-color: hsl(var(--category-hue, 210) 38% 78%);
  background: hsl(var(--category-hue, 210) 48% 92%);
  color: hsl(var(--category-hue, 210) 42% 30%);
}
.event-range.category-branch-promo, .task-pill.category-branch-promo {
  border-color: rgba(29, 122, 140, 0.25);
  background: #dceff0;
  color: #145d69;
}

.day-cell.is-today {
  border-color: rgba(29, 122, 140, 0.45);
  background: rgba(29, 122, 140, 0.03);
}

.day-cell.is-selected {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px rgba(29, 122, 140, 0.35);
}

.day-cell.is-muted {
  background: #f4f6f8;
  color: rgba(22, 48, 74, 0.5);
}

.day-heading {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  min-height: 18px;
}

.day-number {
  flex: 0 0 auto;
  font-size: 0.9rem;
  font-weight: 800;
}

.day-number.is-red {
  color: #c43b3b;
}

.holiday-label {
  min-width: 0;
  overflow: hidden;
  color: #a43b3b;
  font-size: 0.66rem;
  font-weight: 700;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.day-tasks {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.task-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: 999px;
  color: var(--ink);
  font-size: 0.71rem;
  font-weight: 700;
  background: var(--accent-soft);
  border: 1px solid transparent;
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
}

.task-pill::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
}

.task-pill.pending { color: var(--amber); background: rgba(255, 179, 71, 0.1); }
.task-pill.done { color: var(--green); background: rgba(45, 159, 118, 0.1); }
.task-pill.urgent { color: var(--red); background: rgba(213, 75, 75, 0.1); }
.task-pill.default { color: var(--accent); background: var(--accent-soft); }

.task-panel {
  margin-top: 22px;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  box-shadow: 0 12px 24px var(--shadow);
}

.panel-header {
  margin-bottom: 12px;
}

.panel-header h2 {
  margin: 0;
  font-size: 1.15rem;
}

.task-list {
  display: grid;
  gap: 12px;
}

.task-item {
  display: grid;
  gap: 8px;
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfcfd;
  color: var(--ink);
  text-align: left;
}

.task-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.task-item h3 {
  margin: 0;
  font-size: 1.02rem;
}

.task-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 800;
}

.task-status.pending { background: rgba(255, 179, 71, 0.14); color: #bd7a05; }
.task-status.done { background: rgba(45, 159, 118, 0.12); color: var(--green); }
.task-status.urgent { background: rgba(213, 75, 75, 0.12); color: var(--red); }
.task-status.default { background: var(--accent-soft); color: var(--accent); }

.task-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted);
  font-size: 0.8rem;
}

.task-notes {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.6;
}

.loading-state,
.empty-state {
  display: grid;
  place-items: center;
  min-height: 130px;
  padding: 20px;
  border: 1px dashed var(--line);
  border-radius: 12px;
  background: var(--panel-soft);
  color: var(--muted);
  text-align: center;
}

.detail-shell {
  width: min(900px, 100%);
  margin: 0 auto;
}

.detail-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  box-shadow: 0 18px 28px var(--shadow);
}

.detail-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.detail-record-list {
  display: grid;
  gap: 12px;
}

.detail-record {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-soft);
}

.detail-record-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
}

.detail-record-header h2 {
  margin: 0;
  font-size: 1rem;
}

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

.detail-record-content,
.detail-editor {
  padding: 0 16px 16px;
}

.detail-values {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.detail-value {
  display: grid;
  gap: 5px;
  min-width: 0;
}

.detail-value-full {
  grid-column: 1 / -1;
}

.detail-value-label {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
}

.detail-value-text {
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.detail-editor .form-actions {
  margin-top: 14px;
}

.detail-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.form-field {
  display: grid;
  gap: 8px;
}

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

.form-field label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
}

.form-field textarea {
  min-height: 120px;
  resize: vertical;
}

.form-field input:disabled,
.form-field textarea:disabled,
.form-field select:disabled {
  background: #f4f6f8;
  color: var(--muted);
  cursor: not-allowed;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
}

.primary-button {
  border: none;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #fff;
}

.primary-button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.status-message {
  margin-top: 16px;
  min-height: 24px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--muted);
}

.status-message.success {
  color: var(--green);
}

.status-message.error {
  color: var(--red);
}

@media (max-width: 820px) {
  .todo-header,
  .detail-toolbar,
  .form-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .header-links {
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .calendar-weekdays,
  .calendar-grid {
    gap: 8px;
  }

  .calendar-grid {
    min-height: 360px;
  }

  .day-cell {
    min-height: 94px;
    padding: 8px;
  }

  .day-heading { gap: 4px; }
  .holiday-label { font-size: 0.58rem; }

  .calendar-event-layer {
    grid-auto-rows: 94px;
    --event-lane-offset: 30px;
    --event-lane-gap: 17px;
  }

  .event-range {
    height: 17px;
    padding: 2px 5px;
    font-size: 0.62rem;
  }

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

  .detail-values {
    grid-template-columns: 1fr;
  }

  .detail-record-header {
    align-items: flex-start;
  }
}